CN207298035U - A kind of electromagnetic drive type micro flow valve - Google Patents

Abstract

The utility model provides an electromagnetically driven miniature flow valve, which is composed of a valve body, an upper permanent magnet, a coil, pyrolytic graphite, a gasket, a lower permanent magnet, a baffle plate and a valve body cover, and the valve body cover is provided with a liquid inlet And the liquid outlet, when there is no current in the coil, because the magnetization direction of the upper permanent magnet and the lower permanent magnet is opposite, a repulsive force will be generated between the upper permanent magnet and the lower permanent magnet, and the liquid inlet is closed at this time. After an appropriate current is applied, an induced magnetic field will be generated in the coil, and when the induced magnetic field generated by the coil is large enough, it will attract the lower permanent magnet to drive the stop plate to move upward, so that the liquid inlet and the liquid outlet are in a connected state. The utility model has the advantages of simple structure, low power consumption and fast response speed, and because the pyrolytic graphite plate is provided, the force on the lower permanent magnet is more uniform, and it is not easy to tilt during the rising process, so that the structure is more stable and reliable.

Description

An electromagnetically driven miniature flow valve

technical field

The utility model relates to the field of electromagnetic valves, in particular to an electromagnetic-driven miniature flow valve.

Background technique

The miniature electromagnetic flow valve has a very wide range of applications and is an indispensable key component in the automation control system. The current miniature electromagnetic flow valve generally has problems such as complex structure, high power consumption, and slow response speed.

Contents of the invention

The utility model provides an electromagnetically driven miniature flow valve, which is used to solve the existing problems of the existing miniature electromagnetic flow valve such as complex structure, large power consumption, and slow response speed.

The technical scheme of the utility model is achieved in this way.

An electromagnetically driven miniature flow valve, consisting of a valve body, an upper permanent magnet, a coil, pyrolytic graphite, a gasket, a lower permanent magnet, a baffle plate and a valve body cover, the valve body cover is provided with a liquid inlet and a liquid outlet , the upper permanent magnet, pyrolytic graphite, lower permanent magnet and baffle are all cylinders, and the axes of the upper permanent magnet, pyrolytic graphite, lower permanent magnet and baffle are coincident, the magnetization of the upper permanent magnet and the lower permanent magnet The directions are all axial, and the magnetization directions of the upper permanent magnet and the lower permanent magnet are opposite. The upper permanent magnet is arranged in the center of the upper surface of the valve body cavity, and the lower permanent magnet is arranged on the upper surface of the stopper. When there is no current in the coil , since the magnetization direction of the upper permanent magnet is opposite to that of the lower permanent magnet, a repulsive force will be generated between the upper permanent magnet and the lower permanent magnet. At this time, the liquid inlet is closed. The induced magnetic field, when the induced magnetic field generated by the coil is large enough, will attract the lower permanent magnet to drive the stop plate to move upward, so that the liquid inlet and the liquid outlet are in a connected state.

The pyrolytic graphite is arranged in the cavity of the valve body, and is located between the upper permanent magnet and the lower permanent magnet. There is a certain cavity space between the pyrolytic graphite and the lower permanent magnet. The pyrolytic graphite passes through the adhesive It is connected and fixed with the inner wall of the valve, and the arrangement of pyrolytic graphite can effectively improve the uniformity of the magnetic force on the lower permanent magnet.

The coil can be configured as a single-layer, double-layer or multi-layer coil, preferably a multi-layer coil to enhance the intensity of the induced magnetic field generated.

The valve body, the gasket, the valve body cover and the baffle plate are all made of non-magnetic materials.

The upper permanent magnet and the lower permanent magnet can optionally adopt NdFeB magnets.

The lower permanent magnet is arranged at the center of the upper end surface of the baffle plate, and at the same time, it should be ensured that the surface roughness of the lower end surface of the baffle plate and the outer cylinder of the baffle plate is less than 3.2. The upper end surface of the valve body cover is parallel to the lower end surface of the baffle plate, and at the same time, it should be ensured that the surface roughness of the upper end surface of the valve body cover is less than 3.2.

The utility model solves the problems existing in the background technology and has the following gain effects.

An electromagnetically driven miniature flow valve has the advantages of simple structure, low power consumption, and fast response speed, and because of the pyrolytic graphite plate, the force on the lower permanent magnet is more uniform, and it is not easy to tilt during the rising process, thus making the structure more stable. Stable and reliable.

Description of drawings

Fig. 1 is a schematic diagram of the structure when no current is passed through the coil.

Fig. 2 is a schematic diagram of the structure when current is passed through the coil.

Labeling in the figure.

1. Valve body, 2. Upper permanent magnet, 3. Coil, 4. Pyrolytic graphite, 5. Gasket, 6. Lower permanent magnet, 7. Baffle plate, 8. Valve body cover, 9. Liquid inlet, 10 Liquid outlet .

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1.

As shown in Figure 1, an electromagnetically driven miniature flow valve consists of a valve body (1), an upper permanent magnet (2), a coil (3), pyrolytic graphite (4), a gasket (5), and a lower permanent magnet ( 6), the baffle plate (7) and the valve body cover (8), the valve body cover (8) is provided with a liquid inlet (9) and a liquid outlet (10), the upper permanent magnet (2), heat The decomposed graphite (4), the lower permanent magnet (6) and the baffle (7) are all cylinders, and the upper permanent magnet (2), pyrolytic graphite (4), the lower permanent magnet (6) and the baffle (7) The axes coincide, the magnetization directions of the upper permanent magnet (2) and the lower permanent magnet (6) are both axial, and the magnetization directions of the upper permanent magnet (2) and the lower permanent magnet (6) are opposite, the pyrolytic graphite ( 4) It is arranged in the cavity of the valve body (1), and is located between the upper permanent magnet (2) and the lower permanent magnet (6), and there is a certain distance between the pyrolytic graphite (4) and the lower permanent magnet (6). cavity space, the pyrolytic graphite (4) is connected to the inner wall of the valve body (1) through an adhesive. The valve body (1), gasket (5), valve body cover (8) and retaining plate (7) are all made of non-magnetic materials. The upper permanent magnet (2) is arranged at the center of the upper surface of the cavity of the valve body (1), and the upper permanent magnet (2) and the lower permanent magnet (6) adopt N35 type NdFeB magnets. The lower permanent magnet (6) is arranged on the upper end surface of the baffle plate (7), and the surface roughness of the lower end surface of the baffle plate (7) and the outer cylinder of the baffle plate (7) is 1.6. The upper end surface of the valve body cover (8) is parallel to the lower end surface of the baffle plate (7), and the surface roughness of the upper end surface of the valve body cover (8) is 1.6. The coil (3) is set as a three-layer coil. When there is no current in the coil (3), since the magnetization directions of the upper permanent magnet (2) and the lower permanent magnet (6) are opposite, the upper permanent magnet (2) and the lower permanent magnet A repulsive force will be generated between (6), and the liquid inlet (9) is in a closed state at this time.

Example 2.

As shown in Figure 2, an electromagnetically driven miniature flow valve consists of a valve body (1), an upper permanent magnet (2), a coil (3), pyrolytic graphite (4), a gasket (5), and a lower permanent magnet ( 6), the baffle plate (7) and the valve body cover (8), the valve body cover (8) is provided with a liquid inlet (9) and a liquid outlet (10), the upper permanent magnet (2), heat The decomposed graphite (4), the lower permanent magnet (6) and the baffle (7) are all cylinders, and the upper permanent magnet (2), pyrolytic graphite (4), the lower permanent magnet (6) and the baffle (7) The axes coincide, the magnetization directions of the upper permanent magnet (2) and the lower permanent magnet (6) are both axial, and the magnetization directions of the upper permanent magnet (2) and the lower permanent magnet (6) are opposite, the pyrolytic graphite ( 4) It is arranged in the cavity of the valve body (1), and is located between the upper permanent magnet (2) and the lower permanent magnet (6), and there is a certain distance between the pyrolytic graphite (4) and the lower permanent magnet (6). cavity space, the pyrolytic graphite (4) is connected to the inner wall of the valve body (1) through an adhesive. The valve body (1), gasket (5), valve body cover (8) and retaining plate (7) are all made of non-magnetic materials. The upper permanent magnet (2) is arranged at the center of the upper surface of the cavity of the valve body (1), and the upper permanent magnet (2) and the lower permanent magnet (6) adopt N35 type NdFeB magnets. The lower permanent magnet (6) is arranged on the upper end surface of the baffle plate (7), and the surface roughness of the lower end surface of the baffle plate (7) and the outer cylinder of the baffle plate (7) is 1.6. The upper end surface of the valve body cover (8) is parallel to the lower end surface of the baffle plate (7), and the surface roughness of the upper end surface of the valve body cover (8) is 1.6. The coil (3) is set as a three-layer coil. When an appropriate current is passed through the coil (3), an induced magnetic field will be generated in the coil (3). When the induced magnetic field generated by the coil (3) is large enough , will attract the lower permanent magnet (6) to drive the stop plate (7) to move upward, so that the liquid inlet (9) and the liquid outlet (10) are in a connected state, and the current permanent magnet (6) drives the stop plate (7) to rise to a certain After the distance, the stop disc (7) contacts with the washer (5), and the movement of the lower permanent magnet (6) and the stop disc (7) stops.

Claims (3)

1. An electromagnetically driven miniature flow valve, characterized in that it consists of a valve body (1), an upper permanent magnet (2), a coil (3), pyrolytic graphite (4), a gasket (5), and a lower permanent magnet ( 6), the baffle plate (7) and the valve body cover (8), the valve body cover (8) is provided with a liquid inlet (9) and a liquid outlet (10), the upper permanent magnet (2), heat The decomposed graphite (4), the lower permanent magnet (6) and the baffle (7) are all cylinders, and the upper permanent magnet (2), pyrolytic graphite (4), the lower permanent magnet (6) and the baffle (7) The axes coincide, the magnetization directions of the upper permanent magnet (2) and the lower permanent magnet (6) are axial, and the magnetization directions of the upper permanent magnet (2) and the lower permanent magnet (6) are opposite, and the upper permanent magnet ( 2) It is set in the center of the upper surface of the cavity of the valve body (1), and the upper surface of the stopper (7) is provided with a lower permanent magnet (6). When there is no current in the coil (3), due to the upper permanent magnet (2) Opposite to the magnetization direction of the lower permanent magnet (6), a repulsive force will be generated between the upper permanent magnet (2) and the lower permanent magnet (6). At this time, the liquid inlet (9) is closed. After an appropriate current is applied, an induced magnetic field will be generated in the coil (3), and when the induced magnetic field generated by the coil (3) is large enough, it will attract the lower permanent magnet (6) and drive the stopper (7) to move upward, making the liquid inlet (9) is in communication with the liquid outlet (10). 2. An electromagnetically driven micro-flow valve according to claim 1, characterized in that: the pyrolytic graphite (4) is set in the cavity of the valve body (1), and is located between the upper permanent magnet (2) and the lower Between the permanent magnets (6), there is a certain cavity space between the pyrolytic graphite (4) and the lower permanent magnet (6). 3. An electromagnetically driven micro-flow valve according to claim 1, characterized in that: the coil (3) can be set as a single-layer, double-layer or multi-layer coil.