Electromagnetic valve with anti-falling sealing plug

Abstract

The electromagnetic valve comprises a shell, a coil assembly is arranged in a cavity of the shell, a valve element seat is arranged at a cavity opening in the end of the shell, a movable iron core and a static iron core which are matched with each other are arranged at a cavity defined by the coil assembly, and a first elastic piece is arranged between the movable iron core and the static iron core. The shaft diameter of at least part of the axial section of the partial sealing plug in the cavity above the outlet of the valve core seat is greater than the hole diameter of the outlet of the valve core seat; the hole diameter of the outlet of the valve element seat is limited, the sealing plug with the shaft diameter larger than the hole diameter of the outlet cannot fall off from the outlet of the valve element seat, and the phenomenon that the sealing plug is lost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve device technology, specifically to a solenoid valve with a sealing plug anti-dislodgement type. Background Technology

[0002] Solenoid valves are commonly used industrial devices, used to adjust the direction, flow rate, and speed of media. A common type of solenoid valve structure includes a housing, coil assembly, moving and stationary iron cores, a sealing plug, and a valve seat. The coil assembly is housed inside the housing cavity, and the moving and stationary iron cores are installed in the coil assembly cavity. A spring is installed between the moving and stationary iron cores. The valve seat is fixed at the opening of the housing cavity, and the sealing plug is placed at the outlet of the valve seat, with a spring at the end of the sealing plug. In use, if the housing is fixed to a valve plate or other mechanism, the spring between the moving and stationary iron cores pushes the moving iron core forward, which in turn pushes the sealing plug forward. The spring on the sealing plug is compressed, and the forward-moving sealing plug seals the corresponding cavity opening at the valve plate. In this structure, there is no positioning mechanism between the sealing plug and the valve seat. When the solenoid valve is removed from its relative installation position for maintenance, the sealing plug is prone to detaching from the valve seat, which can lead to the loss of the sealing plug. This needs to be improved. Utility Model Content

[0003] To address at least one of the aforementioned technical deficiencies, this utility model provides the following technical solution:

[0004] This application discloses a solenoid valve with a sealing plug anti-detachment type, including a housing, a coil assembly disposed within the cavity of the housing, and a valve core seat disposed at the end cavity of the housing. A moving iron core and a stationary iron core are disposed in a cavity enclosed by the coil assembly, and an elastic element is disposed between the moving iron core and the stationary iron core. The elastic element drives the moving iron core to move so that its end extends from the valve core seat inlet into its cavity. A sealing plug is disposed at the valve core seat outlet, and the sealing plug is at least partially located in the valve core seat cavity and forms a fit with the end of the moving iron core. On the portion of the sealing plug located in the cavity above the valve core seat outlet, the shaft diameter of at least a portion of its axial section is larger than the outlet orifice diameter of the valve core seat.

[0005] In this solenoid valve, the outlet orifice diameter of the valve core seat is limited. The sealing plug, whose shaft diameter is larger than the outlet orifice diameter, cannot fall off from the valve core seat outlet. The connection between the sealing plug and the valve core seat is stable, and the phenomenon of sealing plug loss is not easy to occur.

[0006] Furthermore, the valve core seat has protrusions on its cavity wall, and the orifice formed by the protrusions is the outlet of the valve core seat. The protrusions forming the outlet help to simplify the structure of the valve core seat.

[0007] Furthermore, the sealing plug is T-shaped and its horizontal portion is located in the valve core seat cavity. The horizontal shaft diameter of the sealing plug is larger than the outlet hole diameter of the valve core seat, and its vertical shaft diameter is smaller than the outlet hole diameter of the valve core seat. This restricts the configuration and corresponding size of the sealing plug, making it easier for the sealing plug portion to extend from the outlet to better seal the cavity opening, etc.

[0008] Furthermore, an elastic element two is provided at the first end of the sealing plug, and the elastic force of the first elastic element is greater than that of the second elastic element.

[0009] Furthermore, both the first elastic element and the second elastic element are springs, with the second elastic element fitted onto the first end of the sealing plug.

[0010] Furthermore, it also includes a valve plate, in which a flow channel is provided and a mounting hole is provided on the side of the valve plate. The mounting hole and the flow channel are connected by a cavity. The housing is located at the mounting hole. With the cooperation of the moving iron core, the stationary iron core, elastic element one, and elastic element two, a sealing plug is used to open or seal the cavity opening in the mounting hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model limits the relative size of the outlet diameter of the valve core seat and the shaft diameter of the sealing plug, thereby limiting the separation of the sealing plug from the valve core seat outlet and making it less likely for the sealing plug to be lost. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the cross-sectional structure of the solenoid valve in Example 1;

[0015] Figure 2 This is a schematic diagram of the overall structure of this solenoid valve;

[0016] The attached figures are labeled as follows:

[0017] 1. Housing; 2. Coil assembly; 3. Stationary iron core; 4. Moving iron core; 5. Elastic element one; 6. Valve core seat; 7. Sealing plug; 8. Valve plate; 9. Elastic element two; 61. Protruding rib; 62. Outlet; 71. Horizontal part; 72. Vertical part; 81. Flow channel; 82. Cavity; 83. Mounting hole. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1

[0020] like Figure 1 , Figure 2As shown, in this example, a solenoid valve with a sealing plug anti-dislodgement type includes a housing 1, which is a common rectangular shape. A coil assembly 2 is placed inside the cavity of the housing 1. The coil assembly is a common type with wire wound on a wire frame. A stationary iron core 3 is placed in the cavity enclosed by the coil assembly 2. A matching moving iron core 4 is placed below the stationary iron core 3. An elastic element 5 is placed between the stationary iron core 3 and the moving iron core 4. For example, a spring can be used as the elastic element 5. Of course, other elastic mechanisms can also be used in the elastic element 5.

[0021] The cavity opening is located at the bottom of the housing 1, and the valve core seat 6 is fixed at the cavity opening. An inlet is formed at the top of the valve core seat 6. Under the push of the elastic element 5, the end of the moving iron core 4 extends into the cavity of the valve core seat 6 from the inlet. The sealing plug 7 is placed at the outlet 62 of the valve core seat 6 below the inlet. The sealing plug can be partially or entirely located in the cavity above the outlet. Figure 1 As shown, in this example, the sealing plug adopts a common T-shaped body. The upper part (i.e., the horizontal part 71) of the sealing plug is located in the valve core seat 6 cavity above the outlet 62 and forms a fit with the end of the moving iron core 4. For example, the top surface of the sealing plug 7 abuts against the end of the moving iron core 4 that extends into the cavity, and the moving iron core 4 pushes the sealing plug 7 down. The lower part (i.e., the vertical part 72) of the sealing plug extends out from the outlet to seal the required cavity opening, or the lower part of the sealing plug protrudes outward to seal the cavity opening inside the valve core seat cavity.

[0022] In this example, the orifice diameter of the valve core seat outlet is restricted to prevent the sealing plug from falling off. For example, on the portion of the sealing plug located in the cavity above the valve core seat outlet, at least a portion of its axial section has a shaft diameter larger than the outlet orifice diameter of the valve core seat. Figure 1 As shown, the diameter of the transverse portion of the sealing plug in the valve seat cavity is larger than the outlet orifice diameter, while the diameter of the longitudinal portion 72 of the sealing plug is smaller than the outlet orifice diameter 62. In this example, the transverse portion 71 of the sealing plug 7 is an axial end with a consistent diameter. Of course, this transverse portion can also adopt a configuration with inconsistent diameters, such as a stepped shaft, or the sealing plug as a whole can adopt other configurations, as long as the diameter of any part of the axial section of the sealing plug above the outlet is larger than the outlet orifice diameter of the valve seat.

[0023] Regarding the outlet configuration, the cavity at the bottom of the valve core seat can be directly constricted. Alternatively, a ridge can be formed on the existing valve core seat cavity wall, with the orifice formed by the ridge serving as the outlet, thus minimizing structural modifications to the valve core seat. Specifically, for example... Figure 1 As shown, a convex rib 61 is formed radially outward at the periphery of the bottom cavity of the valve core seat 6. The orifice formed by the convex rib 61 is the outlet 62 of the valve core seat. During the downward movement of the sealing plug, it abuts against the convex rib, and the sealing plug cannot be removed from the valve core seat due to the restriction of the convex rib.

[0024] In use, the housing 1 is fixed to the valve plate 8. A flow channel 81 is formed inside the valve plate 8, and a mounting hole is formed on the side of the valve plate 8. The mounting hole and the flow channel 81 are connected by a cavity 82. The housing 1 is fixed to the mounting hole with bolts, etc. The bottom of the valve core seat 6 is located in the mounting hole. An elastic element 9 is installed at the longitudinal part of the sealing plug 6. If a spring is used as the elastic element 9, the top of the spring is fitted onto the longitudinal part 72 of the sealing plug 6, and the bottom of the elastic element 9 abuts against the bottom wall of the mounting hole. Under normal conditions, the elastic force of the elastic element 9 is less than that of the elastic element 1. Under the pressure of the elastic element 1, the moving iron core pushes the sealing plug downwards, sealing the cavity opening below. After startup, the stationary iron core attracts the moving iron core, causing the sealing plug to move upwards with the cooperation of the elastic element 9, exposing the cavity opening. Part of the gas flowing through the flow channel is discharged from the cavity opening.

[0025] In the above configuration, the sealing plug cannot detach from the valve core seat and will separate from the valve plate along with the housing, reducing the phenomenon of sealing plug loss.

[0026] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A solenoid valve with a sealing plug anti-detachment type, comprising a housing (1), wherein a coil assembly (2) is disposed in the cavity of the housing (1) and a valve core seat (6) is disposed at the end cavity of the housing (1), wherein a moving iron core (4) and a stationary iron core (3) are disposed in the cavity formed by the coil assembly (2), and an elastic element (5) is disposed between the moving iron core (4) and the stationary iron core (3), wherein the elastic element (5) drives the moving iron core (4) to move so that its end extends into the cavity of the valve core seat (6) from the inlet, and a sealing plug (7) is disposed at the outlet (62) of the valve core seat (6), wherein the sealing plug (7) is at least partially located in the cavity of the valve core seat (6) and forms a fit with the end of the moving iron core (4), characterized in that, The portion of the sealing plug (7) located in the cavity above the outlet (62) of the valve core seat (6) has a shaft diameter on at least part of its axial section that is larger than the outlet (62) orifice diameter of the valve core seat (6).

2. The solenoid valve with anti-detachment sealing plug as described in claim 1, characterized in that: The valve core seat (6) has a protrusion (61) on its cavity wall, and the orifice formed by the protrusion (61) is the outlet (62) of the valve core seat (6).

3. The solenoid valve with anti-detachment sealing plug as described in claim 1, characterized in that: The sealing plug (7) is T-shaped and the horizontal part (71) of the sealing plug (7) is located in the cavity of the valve core seat (6). The axial diameter of the horizontal part (71) of the sealing plug (7) is larger than the outlet (62) aperture of the valve core seat (6) and the axial diameter of its vertical part (72) is smaller than the outlet (62) aperture of the valve core seat (6).

4. The solenoid valve with anti-detachment sealing plug as described in claim 1, characterized in that: The sealing plug (7) is provided with an elastic element two (9) at its first end, and the elastic force of the elastic element one (5) is greater than the elastic force of the elastic element two (9).

5. The solenoid valve with anti-detachment sealing plug as described in claim 4, characterized in that: Both the first elastic element (5) and the second elastic element (9) are springs, and the second elastic element (9) is fitted onto the first end of the sealing plug (7).

6. The solenoid valve with anti-detachment sealing plug as described in claim 4, characterized in that: It also includes a valve plate (8), in which a flow channel (81) is provided and a mounting hole is provided on the side of the valve plate (8). The mounting hole and the flow channel (81) are connected by a cavity (82). The housing (1) is located at the mounting hole. With the cooperation of the moving iron core (4), the stationary iron core (3), the first elastic element (5), and the second elastic element (9), the sealing plug (7) opens or seals the cavity opening in the mounting hole.

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