Novel normally-open electromagnetic valve

Abstract

The utility model discloses a novel normally-open electromagnetic valve, which comprises a valve body, a valve core assembly and a coil assembly, and is characterized in that an air inlet channel, a connecting cavity and an air outlet channel are arranged on the valve body, the lower end of the valve core assembly is in threaded connection with the connecting cavity, and an inner cavity of a threaded part at the lower end of the valve core assembly is an adjusting cavity; one end of the air inlet channel and one end of the air outlet channel are both communicated with the adjusting cavity, the coil assembly is connected to the upper end of the valve element assembly in a sleeving mode and connected with the valve body, the lower end of the valve element assembly is connected with a valve element pad assembly, and the valve element pad assembly is used for blocking a connecting opening of the adjusting cavity and the air inlet channel; the first flow channel is used for communicating the air inlet channel and the adjusting cavity, and the valve element assembly is used for controlling the opening and closing state of the first flow channel. The valve element cushion assembly is reasonable in structure, and the valve element cushion assembly can slide up and down through the design of the valve element cushion assembly, so that the opening and closing state in the connecting cavity is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valves, and in particular to a novel normally open solenoid valve. Background Technology

[0002] Solenoid valves are electromagnetically controlled industrial devices, fundamental components of automation systems used to control fluids. They are actuators, not limited to hydraulic or pneumatic systems. Used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, ensuring both precision and flexibility.

[0003] During the use of a solenoid valve, its sealing performance is paramount. The sealing performance of commonly used solenoid valves is often determined solely by the seal between the valve needle and the inlet or outlet port. Once the valve needle wears down, its sealing performance will be significantly reduced. To address this issue, the following solution is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a novel normally open solenoid valve, which has the advantage of improving the sealing performance of the solenoid valve through double sealing.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A novel normally open solenoid valve includes a valve body, a valve core assembly, and a coil assembly. The valve body has an inlet channel, a connecting cavity, and an outlet channel. The lower end of the valve core assembly is threadedly connected to the connecting cavity. The inner cavity of the threaded portion at the lower end of the valve core assembly is the regulating cavity. One end of both the inlet channel and the outlet channel is connected to the regulating cavity. The coil assembly is sleeved on the upper end of the valve core assembly and connected to the valve body. The lower end of the valve core assembly is connected to a valve core gasket assembly. The valve core gasket assembly is used to seal the connection between the regulating cavity and the inlet channel. The valve core gasket assembly has a flow channel I for connecting the inlet channel and the regulating cavity. The valve core assembly is used to control the opening and closing state of the flow channel I.

[0007] Preferably, the valve core gasket assembly includes a valve core gasket and a valve core shell sleeved around the valve core gasket. The valve core shell includes an upper valve core shell and a lower valve core shell. The lower end of the upper valve core shell is sleeved on the upper end of the lower valve core shell and is slidably connected to the lower valve core shell. A pagoda spring is provided in the adjustment cavity. The upper end of the pagoda spring is fixedly connected to the lower end of the upper valve core shell. The pagoda spring is used to maintain a distance between the upper valve core shell and the lower valve core shell. A second flow channel is opened on the upper valve core shell and a third flow channel is opened on the lower valve core shell. When the upper valve core shell and the lower valve core shell maintain a distance, the second flow channel and the third flow channel communicate with each other.

[0008] Preferably, the valve core gasket includes an upper valve core gasket and a lower valve core gasket, the lower end of the upper valve core gasket is sleeved inside the lower valve core gasket and is slidably connected to the lower valve core gasket, and the inner wall of the upper valve core shell is fixedly connected to the upper valve core gasket.

[0009] Preferably, the outer edge of the lower valve core shell is sealed against the inner wall of the regulating cavity, so that the regulating cavity is divided into upper and lower parts. When the flow channel two and the flow channel three are connected, the upper and lower parts of the regulating cavity are connected.

[0010] The beneficial effects of this utility model are as follows: In the initial state, the pagoda spring lifts up the upper valve core shell, and the flow channel two and the flow channel three are connected, so that the fluid can pass through the air inlet channel, flow channel one, the upper half of the connecting cavity, flow channel two, flow channel three, the lower half of the connecting cavity, and the air outlet channel in sequence, and finally flow out of the valve body.

[0011] When it needs to be closed, the valve needle of the valve core assembly is inserted into the upper end of the first flow channel of the upper valve core pad, pushing the upper valve core pad downward. At this time, the upper valve core shell also moves downward synchronously until the stepped part of the inner cavity of the upper valve core shell abuts against the stepped part of the outer surface of the lower valve core shell. At this time, the valve needle blocks the first flow channel. Since the second and third flow channels are not on the same straight line, after the upper and lower valve core shells abut, the second and third flow channels are no longer connected, achieving a second blockage, thereby greatly improving the sealing performance of the solenoid valve. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0013] Figure 2 This is a schematic diagram of the exploded structure of an embodiment;

[0014] Figure 3 This is a cross-sectional view of an embodiment;

[0015] Figure 4 This is a cross-sectional view used to illustrate the valve core gasket assembly in an embodiment.

[0016] Reference numerals in the attached diagram: 1. Valve body; 2. Valve core assembly; 3. Coil assembly; 4. Inlet passage; 5. Outlet passage; 6. Adjustment chamber; 7. Valve core gasket assembly; 8. Flow channel one; 9. Valve core gasket; 10. Valve core housing; 11. Upper valve core housing; 12. Lower valve core housing; 13. Pagoda spring; 14. Flow channel two; 15. Flow channel three; 16. Upper valve core gasket; 17. Lower valve core gasket. Detailed Implementation

[0017] The following description is merely a preferred embodiment of this utility model, and the scope of protection is not limited to this embodiment. All technical solutions falling within the scope of this utility model's concept should be protected. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom" and "top," "inner" and "outer" refer to directions toward or away from the geometric center of a specific component.

[0018] like Figures 1 to 4 As shown, a novel normally open solenoid valve includes a valve body 1, a valve core assembly 2, and a coil assembly 3. The valve body 1 has an inlet channel 4, a connecting cavity, and an outlet channel 5. The lower end of the valve core assembly 2 is threaded to the connecting cavity, and the inner cavity of the threaded portion at the lower end of the valve core assembly 2 serves as the adjusting cavity 6. The coil assembly 3 is sleeved on the upper end of the valve core assembly 2 and connected to the valve body 1 by screws or other fasteners. Both the valve core assembly 2 and the coil assembly 3 in this application are conventional designs; the coil assembly 3 only needs to control the up-and-down movement of the valve needle in the valve core assembly 2. The inlet channel 4 and the outlet channel 5 allow both gas and liquid to flow through.

[0019] The lower end of the valve core assembly 2 is connected to a valve core gasket assembly 7. A flow channel 8 is provided on the valve core gasket assembly 7, which connects the intake passage 4 and the regulating chamber 6. The valve core gasket assembly 7 includes a valve core gasket 9 and a valve core shell 10 fitted around the valve core gasket 9. The valve core gasket 9 includes an upper valve core gasket 16 and a lower valve core gasket 17, and the valve core shell 10 includes an upper valve core shell 11 and a lower valve core shell 12. The lower valve core shell 12 is fitted around the lower valve core gasket 17 and is fixedly connected to it. The outer edge of the lower valve core shell 12 seals against the inner wall of the regulating chamber 6, dividing the regulating chamber 6 into an upper and lower half.

[0020] The lower end of the upper valve core shell 11 is sleeved on the upper end of the lower valve core shell 12 and is slidably connected to the lower valve core shell 12. The upper valve core shell 11 has a second flow channel 14, and the lower valve core shell 12 has a third flow channel 15. Flow channels 14 and 15 are not on the same straight line. The inner cavity of the upper valve core shell 11 and the outer edge of the lower valve core shell 12 are both stepped. When the upper valve core shell 11 moves to abut against the stepped structure of the lower valve core shell 12, the inner cavity of the upper valve core shell 11 and the outer wall of the lower valve core shell 12 are sealed, so that a passage cannot be formed between the non-straight flow channels 14 and 15.

[0021] A pagoda spring 13 is installed inside the regulating cavity 6, and the upper end of the pagoda spring 13 is fixedly connected to the lower end of the upper valve core shell 11. In the initial state, the pagoda spring 13 will push the upper valve core shell 11 upward, so that the stepped structure inside the upper valve core shell 11 and the stepped structure on the outer edge of the lower valve core shell 12 maintain a certain distance, thereby allowing the flow channel 2 14 and the flow channel 3 15 to communicate.

[0022] The lower end of the upper valve core gasket 16 is fitted inside the lower valve core gasket 17 and is slidably connected to the lower valve core gasket 17. The inner wall of the upper valve core shell 11 is fixedly connected to the upper valve core gasket 16. When the valve needle of the valve core assembly 2 is inserted into the upper end of the flow channel 8 of the upper valve core gasket 16 and the upper valve core gasket 16 is pushed downward, the upper valve core shell 11 will also move downward synchronously until the stepped part of the inner cavity of the upper valve core shell 11 abuts against the stepped part of the outer side of the lower valve core shell 12. At this time, the valve needle blocks the flow channel 8. Since the flow channels 14 and 15 are not on the same straight line, after the upper valve core shell 11 and the lower valve core shell 12 abut, the flow channels 14 and 15 are not connected, achieving a second blockage, thereby greatly improving the sealing performance of the solenoid valve.

[0023] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel normally open solenoid valve, comprising a valve body (1), a valve core assembly (2), and a coil assembly (3), characterized in that, The valve body (1) is provided with an air inlet channel (4), a connecting cavity and an air outlet channel (5). The lower end of the valve core assembly (2) is threadedly connected to the connecting cavity. The inner cavity of the threaded part at the lower end of the valve core assembly (2) is the regulating cavity (6). One end of the air inlet channel (4) and the air outlet channel (5) are connected to the regulating cavity (6). The coil assembly (3) is sleeved on the upper end of the valve core assembly (2) and connected to the valve body (1). The lower end of the valve core assembly (2) is connected to a valve core pad assembly (7). The valve core pad assembly (7) is used to block the connection between the regulating cavity (6) and the air inlet channel (4). The valve core pad assembly (7) is provided with a flow channel (8). The flow channel (8) is used to connect the air inlet channel (4) and the regulating cavity (6). The valve core assembly (2) is used to control the opening and closing state of the flow channel (8). The valve core assembly (7) includes a valve core pad (9) and a valve core shell (10) sleeved around the valve core pad (9). The valve core shell (10) includes an upper valve core shell (11) and a lower valve core shell (12). The lower end of the upper valve core shell (11) is sleeved around the upper end of the lower valve core shell (12) and is slidably connected to the lower valve core shell (12). A pagoda spring (13) is provided in the adjusting cavity (6). The upper end of the pagoda spring (13) is... The upper valve core shell (11) is fixedly connected to the lower end of the upper valve core shell (11). The pagoda spring (13) is used to maintain a distance between the upper valve core shell (11) and the lower valve core shell (12). The upper valve core shell (11) has a flow channel two (14) and the lower valve core shell (12) has a flow channel three (15). When the upper valve core shell (11) and the lower valve core shell (12) maintain a distance, the flow channel two (14) and the flow channel three (15) are connected.

2. The novel normally open solenoid valve according to claim 1, characterized in that, The valve core pad (9) includes an upper valve core pad (16) and a lower valve core pad (17). The lower end of the upper valve core pad (16) is sleeved inside the lower valve core pad (17) and is slidably connected to the lower valve core pad (17). The inner wall of the upper valve core shell (11) is fixedly connected to the upper valve core pad (16).

3. A novel normally open solenoid valve according to claim 1, characterized in that, The outer edge of the lower valve core shell (12) is sealed against the inner wall of the regulating cavity (6) so that the regulating cavity (6) is divided into upper and lower parts. When the flow channel two (14) and the flow channel three (15) are connected, the upper and lower parts of the regulating cavity (6) are connected.

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