Electromagnetic valve

Abstract

The electromagnetic valve comprises a coil body and a valve seat, the coil body is provided with a through cavity with a downward opening, the valve seat is provided with an inner cavity with an upward opening, the inner cavity is communicated with an inlet and an outlet in the two ends of the valve seat, the lower portion of the coil body is in butt joint with a middle connecting piece, the lower portion of the middle connecting piece is inserted into the inner cavity of the valve seat, and the coil body, the middle connecting piece and the valve seat are fixed through screws. A spring and an iron core are sequentially placed in the through cavity downwards, the spring is sleeved on the upper portion of the iron core, a sealing ring is installed in an inner cavity of the valve seat, the sealing ring is sleeved outside a valve core, a pilot hole extending up and down is arranged in the center of the valve core, a plug is fixedly connected to the lower end of the iron core, and the plug is clamped at the upper end of the valve core and used for opening or blocking the pilot hole. When the electromagnetic valve is opened, the electromagnetic valve has the advantages of high speed and short response time of a direct-acting electromagnetic valve; on the basis of a pilot-operated type electromagnetic valve structure, large flux of flowing water can be realized; the closing effect is as excellent as that of a pilot mode, and in the closing state, the pressure difference under the control of the pilot hole is actually utilized, so that the pressure bearing capacity is high.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, specifically to an electromagnetic valve. Background Technology

[0002] Common solenoid valves include pilot-operated solenoid valves and direct-acting solenoid valves. Both utilize the magnetic force generated when the solenoid coil is energized to lift a metal guide post located in the center of the coil, thereby controlling the flow of water. Once the power is cut off, the metal guide post returns to its original position, disconnecting the water flow. Pilot-operated solenoid valves require pressure to operate. They primarily use pressure difference to open and close the water flow opening within the base (i.e., the main valve port). The metal guide post is mainly used for opening and closing with the pilot orifice. For the main valve port to open, the solenoid valve needs a certain starting pressure; without pressure, it can only open the pilot orifice and cannot open the main valve port. Direct-acting solenoid valves are simpler. For example, CN222783090U discloses a solenoid valve including a coil body and a valve seat. The coil body has a downward-facing cavity in the middle, and the valve seat has an upward-facing inner cavity. The lower part of the coil body is connected to a connecting piece, which is through the middle and inserted into the inner cavity of the valve seat. The coil body, connecting piece, and valve seat are fixed by screws. A spring and an iron core are placed in sequence with the cavity facing downward. The spring is sleeved on the upper part of the iron core, and a plug is sleeved on the lower part of the iron core. The diameter of the middle part of the iron core is larger than the diameter of its upper and lower ends. The lower part of the iron core has a butt that can be sleeved on the inner cavity of the plug. The upper part of the butt is a connecting rod, and the lower part of the connecting rod is a plug with a diameter larger than the connecting rod. The lower end of the plug blocks the water inlet in the inner cavity of the valve seat. In addition, the connecting piece and the coil, and the connecting piece and the valve seat are respectively provided with sealing rings and sealing rings. During operation, it can be directly closed or opened, and can work under zero pressure or negative pressure conditions.

[0003] Pilot-operated solenoid valves have small solenoid heads, low power consumption, large flow capacity, and can be energized frequently and for extended periods without burning out, while also being energy-efficient. Direct-acting solenoid valves have a smaller flow capacity than pilot-operated solenoid valves, but their direct-acting operation results in a faster response time. However, they suffer from higher power consumption and have a lower pressure resistance than pilot-operated solenoid valves.

[0004] Therefore, based on the structure of the pilot-operated solenoid valve, the advantages of both pilot-operated and direct-acting solenoid valves can be combined to give it the characteristics of fast response time, strong pressure resistance, and large flow capacity. Utility Model Content

[0005] In view of the above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a solenoid valve.

[0006] The technical solution of this utility model is: an electromagnetic valve, including a coil body that generates magnetism when energized and a valve seat. The coil body has a downward-opening cavity, and the valve seat has an upward-opening inner cavity. The inner cavity connects to the inlet and outlet at both ends of the valve seat. The lower part of the coil body is connected to a connecting piece, which is vertically connected and inserted into the inner cavity of the valve seat. The coil body, the connecting piece, and the valve seat are fixed by a screw. A spring and an iron core are placed sequentially with the cavity facing downward. The spring is sleeved on the upper part of the iron core. A sealing ring is installed in the inner cavity of the valve seat and is sleeved on the outside of a valve core. The valve core has a vertically extending pilot hole at its center. A plug is fixedly connected to the lower end of the iron core. The plug is engaged with the upper end of the valve core and is used to open or block the pilot hole.

[0007] Furthermore, the plug is fitted with a retainer, which engages the plug with the upper end of the valve core. The valve core has an upward-facing groove for the plug and retainer to engage.

[0008] Furthermore, the upper end of the connector is provided with a notch, and a sealing ring is built into the notch.

[0009] Furthermore, the upper part of the sealing ring is abutted against the bottom end of the cylinder at the lower part of the intermediate connector.

[0010] Furthermore, the intermediate connector has a through channel running vertically through which the iron core passes.

[0011] The advantages of using the solenoid valve provided by this utility model are: when opening, it has the advantages of fast speed and short response time of a direct-acting solenoid valve; based on the structure of a pilot-operated solenoid valve, it can achieve a large flow rate; the closing effect is as good as that of a pilot-operated valve, and in the closed state, it actually utilizes the pressure difference controlled by the pilot orifice, so it exhibits strong pressure resistance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the plug, valve core, clamp, and sealing ring of this utility model after they are connected together;

[0014] Figure 3 This is a schematic diagram of the plug and valve core of this utility model.

[0015] In the figure: 1—coil body, 11—through cavity, 2—valve seat, 3—intermediate connector, 31—channel, 32—cylinder, 4—spring, 5—iron core, 6—sealing ring, 7—valve core, 71—pilot hole, 72—groove, 8—plug, 9—clamp, 10—sealing ring. Detailed Implementation

[0016] To provide a more intuitive and complete understanding of the technical solution of this utility model, the following non-limiting features are described in conjunction with the accompanying drawings:

[0017] like Figure 1 — Figure 3 As shown, a solenoid valve includes a coil body 1 that generates magnetism when energized and a valve seat 2. The coil body 1 has a downward-facing through cavity 11, and the valve seat 2 has an upward-facing inner cavity (not shown in the figure). The inner cavity connects to the inlet and outlet at both ends of the valve seat 2. The lower part of the coil body 1 is connected to a connecting piece 3, which is vertically continuous. The lower part of the connecting piece 3 is inserted into the inner cavity of the valve seat 2. The coil body 1, the connecting piece 3, and the valve seat 2 are fixed by screws. A spring 4 and an iron core 5 are placed in the downward-facing through cavity 11. The spring 4 is sleeved on the upper part of the iron core 5. A sealing ring 6 is installed in the inner cavity of the valve seat 2. The sealing ring 6 is sleeved on the outside of a valve core 7. The valve core 7 has a vertically extending pilot hole 71 at its center. A plug 8 is fixedly connected to the lower end of the iron core 5. The plug 8 is snapped onto the upper end of the valve core 7 and is used to open or block the pilot hole 71.

[0018] like Figure 2 , Figure 3 As shown, in order to facilitate the installation of the plug 8, a retaining piece 9 is fitted over the plug 8. The plug 8 is snapped onto the upper end of the valve core 7 by the retaining piece 9. The valve core 7 has a groove 72 with the opening facing upward for the plug 8 and the retaining piece 9 to be snapped into.

[0019] The upper end of the connector 3 is provided with a notch (not shown in the figure), and a sealing ring 10 is built into the notch to improve the sealing effect between the connector 3 and the coil body 1.

[0020] The upper part of the sealing ring 6 is abutted by the bottom end of the cylinder 32 at the lower part of the intermediate connector 3, resulting in a good sealing effect between the intermediate connector 3 and the valve seat 2.

[0021] The connecting piece 3 has a through channel 31 running vertically through it, through which the iron core 5 passes. This design ensures that the iron core 5 has a smooth telescopic channel 31.

[0022] The solenoid valve provided by this utility model has the advantages of fast opening speed and short response time of a direct-acting solenoid valve; based on the structure of a pilot-operated solenoid valve, it can achieve a large flow rate; the closing effect is as good as that of a pilot-operated valve. In the closed state, it actually utilizes the pressure difference controlled by the pilot hole 71, so it exhibits strong pressure resistance.

[0023] Of course, the above are only preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any simple modifications and equivalent structural changes made based on the contents of the present utility model specification and drawings should also be included within the patent protection scope of the present utility model.

Claims

1. A solenoid valve, comprising a coil body that generates magnetism upon energization and a valve seat, the coil body having a downward-opening cavity, the valve seat having an upward-opening inner cavity, the inner cavity connecting the inlet and outlet at both ends of the valve seat, the lower part of the coil body abutting a connecting piece, the connecting piece extending vertically, the lower part of the connecting piece inserted into the inner cavity of the valve seat, the coil body, the connecting piece, and the valve seat being fixed by a screw, a spring and an iron core being sequentially placed downward-facing in the cavity, the spring being sleeved on the upper part of the iron core, characterized in that: A sealing ring is installed inside the valve seat cavity. The sealing ring is fitted around a valve core. The valve core has a pilot hole extending vertically at its center. A plug is fixedly connected to the lower end of the iron core. The plug is engaged with the upper end of the valve core and is used to open or block the pilot hole.

2. The solenoid valve according to claim 1, wherein: The plug sleeve has a retainer, and the plug is secured to the upper end of the valve core by the retainer. The valve core has an upward-facing groove for the plug and retainer to be inserted.

3. The solenoid valve according to claim 1, wherein: The upper end of the connector has a notch with a sealing ring inside.

4. The solenoid valve according to claim 1, wherein: The upper part of the sealing ring is for the bottom end of the cylinder at the bottom of the middle connector to abut.

5. The solenoid valve according to claim 1, wherein: The connector has a through channel running vertically through which the iron core passes.

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