Small-caliber direct-acting electromagnetic valve

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to a small-caliber direct-acting electromagnetic valve which achieves the effects of being small in size, fast in response and low in cost. Comprising a valve cover and a valve base, the movable iron core is installed in the valve cover in an up-down sliding mode, the static iron core is fixedly installed in the valve cover, the valve cover and the static iron core are matched to form a space for the valve needle to move, an air inlet is formed in the side edge of the valve base, and an air outlet and a small exhaust port are formed in the bottom end of the valve base. A coil assembly is installed outside the valve cover, a round hole table is arranged at the lower end of the static iron core, a valve needle and a return spring are installed between the valve cover and the static iron core, and a sealing rubber pad is arranged on the lower portion of the valve needle.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic valve, in particular to a small caliber direct acting electromagnetic valve. BACKGROUND

[0002] Electromagnetic valves are often used in various types of electromagnetic valves in thermal management systems in order to control and regulate fluid media.

[0003] Electromagnetic valves are key components in the field of industrial automation control, widely used in various fluid control systems. Among them, small caliber direct acting electromagnetic valves play an important role in small refrigeration equipment, kitchen appliances, ice machines, ice cabinets and other small and precise equipment due to their small size, fast response, high control precision and other characteristics. This paper aims to discuss the background technology of a small caliber direct acting electromagnetic valve, including its working principle, structural characteristics, application fields and development trend. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the utility model provides a kind of small caliber direct acting electromagnetic valve of the effect of realizing small size, fast response, low cost.

[0005] The utility model relates to a kind of small caliber direct acting electromagnetic valve, including valve cover and valve base, valve cover is installed in the upper portion of valve base;It further includes moving iron core, static iron core, valve needle, return spring and sealing rubber pad, moving iron core is slidably installed in the inside of valve cover, static iron core is fixedly installed in the inside of valve cover, space for valve needle activity is formed between valve cover and static iron core cooperation, the side of valve base is provided with air inlet, the bottom end of valve base is provided with gas outlet and small exhaust port, coil assembly is installed outside valve cover, static iron core lower end is provided with round hole platform, valve needle and return spring are installed between valve cover and static iron core, sealing rubber pad is arranged in the lower portion of valve needle;Valve normal state is in normal open state, the side of valve base air inlet is inhaled, and the gas outlet is discharged, moving iron core is supported by return spring to be in the valve top in normal state, when needing to close, coil winding generates magnetic field by electrification, so that moving iron core drives valve needle to move downward to push sealing rubber pad, so that sealing rubber pad and valve base gas outlet upper end port are pasted to make the whole valve be in closed state, when needing to open, coil winding is de-energized, moving iron core moves upward by valve needle and return spring, the sealing rubber pad of valve needle lower end opens valve base gas outlet upper end port, and gas is discharged from pressure relief port, to realize the effect of small size, fast response, low cost.

[0006] Preferably, the coil assembly is composed of a coil former, a coil winding, an injection molding shell, and a coil yoke. The coil former is sleeved with the coil winding, both of which are wrapped by the injection molding shell, and the coil yoke is installed outside the injection molding shell. This improves the convenience of driving the moving iron core.

[0007] Preferably, a sealing ring is further included, which is installed on the outer sidewall of the valve base; the sealing effect between the valve base and the external pipeline is improved.

[0008] Preferably, the upper end of the moving iron core is in the shape of a circular truncated cone.

[0009] Preferably, the moving iron core and the valve cover are connected by press welding; the connection firmness is improved, and the processing convenience is improved.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the valve is in the normally open state in the normal state, the side air inlet of the valve base admits air, and the air outlet discharges air; in the normal state, the moving iron core is supported by the return spring at the valve top, when it is needed to be closed, the coil winding generates a magnetic field by being electrified, so that the moving iron core drives the valve needle to move downward to push the sealing rubber pad, the sealing rubber pad is attached to the upper end of the air outlet of the valve base, and the whole valve is in the closed state; when it is needed to be opened, the coil winding is de-energized, the moving iron core moves upward by relying on the valve needle and the return spring, the sealing rubber pad at the lower end of the valve needle opens the upper end of the air outlet of the valve base, and the gas is discharged from the pressure relief port, so that the effects of small size, fast response and low cost are realized. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is the axonometric structure schematic diagram of the utility model;

[0012] Figure 2 is the axonometric local structure schematic diagram of the connection of the valve cover and the moving iron core;

[0013] Figure 3 is the axonometric local structure schematic diagram of the connection of the valve needle and the moving iron core;

[0014] Figure 4 is the axonometric structure schematic diagram of the connection of the valve cover and the valve base.

[0015] Markings in the drawings: 1, moving iron core; 2, static iron core; 3, valve cover; 4, valve needle; 5, return spring; 6, sealing rubber pad; 7, valve base; 8, sealing ring. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. The utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0017] Embodiment 1

[0018] As Figures 1 to 4As shown, this utility model discloses a small-diameter direct-acting solenoid valve, including a valve cover 3 and a valve base 7. The valve cover 3 is installed on the upper part of the valve base 7. It also includes a moving iron core 1, a stationary iron core 2, a valve needle 4, a return spring 5, and a sealing gasket 6. The moving iron core 1 is slidably installed inside the valve cover 3, and the stationary iron core 2 is fixedly installed inside the valve cover 3. The valve cover 3 and the stationary iron core 2 cooperate to form a space for the valve needle 4 to move. An air inlet is provided on the side of the valve base 7, and an air outlet and a small exhaust port are provided at the bottom of the valve base 7. A coil assembly is installed on the outside of the valve cover 3. A circular hole platform is provided at the lower end of the stationary iron core 2. The valve needle 4 and the return spring 5 are installed between the valve cover 3 and the stationary iron core 2. The sealing gasket 6 is provided at the lower part of the valve needle 4.

[0019] The coil assembly consists of a coil frame, coil windings, injection-molded shell, and coil yoke. The coil frame is covered with coil windings, and the two are wrapped by the injection-molded shell. The injection-molded shell is fitted with a coil yoke.

[0020] In this embodiment, the valve is normally open when in operation. Air enters through the side inlet of the valve base 7 and exits through the outlet. Under normal conditions, the moving iron core 1 is supported at the top of the valve by the return spring 5. When closing is required, the coil winding is energized to generate a magnetic field, causing the moving iron core 1 to drive the valve needle 4 downward and push the sealing gasket 6, so that the sealing gasket 6 is in contact with the upper port of the outlet of the valve base 7, thus closing the entire valve. When opening is required, the coil winding is de-energized, and the moving iron core 1 moves upward by relying on the valve needle 4 and the return spring 5. The sealing gasket 6 at the lower end of the valve needle 4 opens the upper port of the outlet of the valve base 7, and the gas is discharged from the pressure relief port, achieving the effects of small size, fast response, and low cost.

[0021] Example 2

[0022] Based on Example 1, such as Figure 2 As shown, the small-diameter direct-acting solenoid valve of this utility model also includes a sealing ring 8, which is installed on the outer wall of the valve base 7.

[0023] like Figure 2 As shown, the upper end of the moving iron core 1 is in the shape of a frustum;

[0024] like Figure 2 As shown, the stationary iron core 2 and the valve cover 3 are connected by pressure welding;

[0025] In this embodiment, the ease of driving the moving iron core 1 is improved, and the installation sealing effect between the valve base 7 and the external pipeline is improved.

[0026] This utility model discloses a small-diameter direct-acting solenoid valve. During operation, the valve is normally open, with air entering through the side inlet of the valve base 7 and exiting through the outlet. Under normal conditions, the moving iron core 1 is supported at the top of the valve by the return spring 5. When closing is required, the coil winding is energized to generate a magnetic field, causing the moving iron core 1 to drive the valve needle 4 downwards, pushing the sealing gasket 6 so that the sealing gasket 6 fits against the upper port of the outlet of the valve base 7, thus closing the entire valve. When opening is required, the coil winding is de-energized, and the moving iron core 1 moves upwards relying on the valve needle 4 and the return spring 5. The sealing gasket 6 at the lower end of the valve needle 4 opens the upper port of the outlet of the valve base 7, and gas is discharged from the pressure relief port.

[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A small-bore direct-acting solenoid valve comprising a valve cover (3) and a valve base (7), the valve cover (3) being mounted on the upper portion of the valve base (7); characterized in that, It also includes moving iron core (1), static iron core (2), valve needle (4), return spring (5) and sealing rubber pad (6), moving iron core (1) is slidably installed inside valve cover (3), static iron core (2) is fixedly installed in valve cover (3), valve cover (3) and static iron core (2) are cooperated to form a space for valve needle (4) to move, valve base (7) side is provided with air inlet, valve base (7) bottom end is provided with air outlet and small exhaust port, coil assembly is installed outside valve cover (3), static iron core (2) lower end is provided with round hole platform, valve needle (4) and return spring (5) are installed between valve cover (3) and static iron core (2), sealing rubber pad (6) is arranged at the lower part of valve needle (4).

2. A small-bore direct operated solenoid valve according to claim 1, characterized in that The coil assembly is composed of a coil skeleton, a coil winding, an injection molding shell and a coil yoke, the coil skeleton is sleeved with the coil winding, both are wrapped by the injection molding shell, and the coil yoke is installed on the outside of the injection molding shell.

3. A small-bore direct operated solenoid valve according to claim 1, characterized in that It also includes a sealing ring (8) installed on the outer sidewall of the valve base (7).

4. A small-bore direct operated solenoid valve according to claim 1, characterized in that The upper end of the moving iron core (1) is in the shape of a circular truncated cone.

5. A small-bore direct-acting solenoid valve as defined in claim 1, wherein The static iron core (2) and the valve cover (3) are connected by press welding. The upper end of the moving iron core (1) is in the shape of a circular truncated cone.

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