Two-position three-way electromagnetic valve

Abstract

The invention relates to the technical field of electromagnetic valves, in particular to a two-position three-way electromagnetic valve which comprises a shell, a stop iron assembly is arranged in the middle of the shell, an air inlet channel is formed in the axis position of the stop iron assembly, a coil assembly is arranged on the outer side of the stop iron assembly, and a valve seat is arranged on the lower portion of the shell. A movable cavity is formed in the upper portion of the valve seat, a valve element is movably arranged in the movable cavity, an air leakage channel is formed in the middle of the valve seat, and an air channel is formed in the bottom of the shell and communicated with the movable cavity, so that the moving distance of the valve element is reduced, quick response is guaranteed, meanwhile, gaps are reduced, and the service life of the valve element is prolonged. The stability and durability of the electromagnetic valve are improved, and efficient and stable gas control is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of solenoid valves, and in particular to a two-position three-way solenoid valve. Background Art

[0002] As a relatively mature technology, solenoid valves have been widely used. Solenoid valves are industrial equipment controlled by electromagnetics and used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium.

[0003] In the past 20 years, natural gas (LNG) has been maturely developed in the transportation industry, and natural gas (LNG) engines have gradually been used in automobiles, ships and other equipment. In natural gas engine technology, there are also many kinds of valves. The two-position three-way solenoid valve is a relatively common solenoid valve. The common two-position three-way valve mainly includes a valve body, a valve core and a pilot valve. The valve core moves to switch direction. However, in the use of natural gas engines, due to the small volume required, if the movement stroke of the valve core is too large, the response time of the solenoid valve will be prolonged, and the gap will be large, which does not meet the needs of long-term stable use of the engine. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcoming of the two-position three-way solenoid valve in the prior art that the service life is relatively short in a natural gas engine, and to provide a two-position three-way solenoid valve.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical scheme: a two-position three-way solenoid valve, comprising a shell, a stop iron assembly is arranged in the middle position of the shell, an air intake channel is arranged at the axial position of the stop iron assembly, a coil assembly is arranged on the outer side of the stop iron assembly, a valve seat is arranged at the lower part of the shell, an active cavity is arranged at the upper part of the valve seat, a valve core is arranged inside the active cavity, an air release channel is arranged in the middle position of the valve seat, and an air channel is arranged at the bottom of the shell to communicate with the active cavity.

[0006] Furthermore, a support ring is provided at the bottom of the iron stop assembly, and the coil assembly is provided on the upper part of the support ring.

[0007] Furthermore, the coil assembly is provided with at least two groups and is relatively arranged on both sides of the coil assembly, an iron stop fixing ring is provided above the coil assembly, an insulating pad is provided above the iron stop fixing ring, and a pin connected to the coil assembly is provided inside the insulating pad.

[0008] Furthermore, an air outlet boss is provided at the bottom of the iron stop assembly, the air outlet of the air inlet channel is provided at the middle position of the air outlet boss, an air discharge boss is provided at the bottom of the active cavity, and the inlet position of the air discharge channel is provided at the middle position of the air discharge boss.

[0009] Furthermore, the iron stop assembly is made of magnetic conductive material, and a convex ring is provided at the lower part of the iron stop assembly to be clamped with the iron stop fixing ring.

[0010] Furthermore, an upward groove is provided on one side of the bottom of the support ring near the stop iron assembly, and the air channel is connected with the active cavity through the groove.

[0011] Furthermore, sealing gaskets are provided on the upper and lower end surfaces of the valve core, a through hole connecting the upper and lower parts of the valve core is provided on the valve core, and a spring is provided at the bottom of the iron stop assembly, and the spring abuts against the valve core.

[0012] Furthermore, a skirt connected to the valve seat is provided at the bottom of the shell, and a sealing ring is provided at the connection between the top of the skirt and the shell.

[0013] The beneficial effects of the embodiments of the present invention are as follows: when the valve core moves upward, the sealing gasket on the upper end surface of the valve core blocks the air outlet of the air inlet channel. Since an air outlet boss is provided at the outlet of the air inlet channel, the diameter of the air outlet boss is smaller than the diameter of the sealing gasket. When the valve core moves upward, the air outlet boss abuts against the upper sealing gasket, thereby achieving the sealing effect of controlling the air outlet channel. When the pressure in the air channel needs to be supplemented, the coil assembly is powered off, and the valve core moves downward under the action of the spring, and the sealing gasket on the lower end surface acts on the air release boss to close the air release channel. A support platform for the valve core is provided at the bottom of the active cavity, and the height of the support platform is slightly lower than the height of the air release boss, which neither affects the movement of the valve core to ensure the sealing effect nor corrects the horizontal position of the valve core. At the same time, it also reduces the moving distance of the valve core and extends the service life of the valve core, thereby adjusting the flow direction and flow rate of the gas, reducing the moving distance of the valve core, ensuring rapid response, reducing the gap, improving the stability and durability of the solenoid valve, and achieving efficient and stable gas control. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0016] Figure 3 It is a cross-sectional structural schematic diagram of the present invention;

[0017] Figure 4 It is a schematic diagram of the enlarged structure of point A of the present invention;

[0018] In the figure: 1. shell; 101. air channel; 2. valve seat; 201. air release channel; 202. air release boss; 203. support platform; 3. iron stop fixing ring; 4. insulating pad; 5. pin; 6. valve core; 601. sealing pad; 602. through hole; 7. iron stop assembly; 701. air inlet channel; 702. air outlet boss; 8. coil assembly; 801. support ring; 9. spring. DETAILED DESCRIPTION

[0019] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0020] See also Figures 1 to 4 The embodiment of the present invention discloses a two-position three-way solenoid valve, which mainly includes a shell 1, a stop iron assembly 7, a coil assembly 8, a valve seat 2, a valve core 6 and other components. The shell 1 serves as a support and protection for the overall structure. A special installation area for the stop iron assembly 7 is arranged in the middle of the shell 1, and the bottom is connected to the valve seat 2. A skirt is also designed at the bottom of the shell 1 for close connection with the valve seat 2. A sealing ring is installed at the connection between the skirt and the shell 1 to ensure that the gas does not leak out. O-rings are arranged on the upper part of the stop iron assembly 7, the side of the shell 1 and the side of the valve seat 2 to ensure the sealing of the solenoid valve during installation.

[0021] The iron stop assembly 7 is arranged in the middle of the shell 1, and an air inlet channel 701 is provided at its axial position for introducing natural gas. The iron stop assembly 7 is made of magnetic conductive material, and a support ring 801 and an air outlet boss 702 are designed at the bottom. The center of the air outlet boss 702 is the air outlet of the air inlet channel 701. A convex ring is also provided at the lower part of the iron stop assembly 7, which is clamped with the iron stop fixing ring 3 to enhance the structural stability. An air channel 101 is provided at the bottom of the shell 1, which is connected to the active cavity through a groove at the bottom of the support ring 801. The valve seat 2 is installed at the bottom of the shell 1, and an active cavity for accommodating the valve core 6 is provided on the top of the valve seat 2. A gas release channel 201 is designed in the middle of the valve seat 2, and the inlet is located at the center of the gas release boss 202 and is connected to the bottom of the active cavity, which is used to release gas when needed. The air inlet channel 701 is connected with the air channel 101, or the air channel 101 is connected with the gas release channel 201 through the action of the valve core 6, so as to realize separate control, achieve the purpose of use, improve the control effect, and ensure that the internal pressure of the air channel 101 is within the threshold range.

[0022] At least two groups of coil assemblies 8 are arranged relatively on both sides of the iron block assembly 7, which are used to generate electromagnetic force to drive the valve core 6 to move, so that the valve core 6 is subjected to balanced force and remains stable and reliable when moving up and down. An iron block fixing ring 3 and an insulating pad 4 are provided above the coil assembly 8. The insulating pad 4 has a certain thickness and wraps the upper part of the iron block assembly 7 to prevent the magnetism of the iron block assembly from leaking out. The insulating pad 4 is embedded with a pin 5 connected to the coil assembly 8 to reduce vibration and ensure safe and reliable electrical connection.

[0023] The valve core 6 is made of magnetic conductive material, and a sealing gasket 601 is installed in the middle position of the upper and lower end surfaces of the valve core 6. The sealing gasket 601 has a certain thickness. The valve core 6 is provided with a through hole 602 on the outer side of the sealing gasket 601 to connect its upper and lower parts. A spring 9 is installed at the bottom of the stop iron assembly 7. The spring 9 is in direct contact with the valve core 6 to provide a reset force for the valve core 6. When the coil assembly 8 is energized during use, the magnetic force generated will magnetize the stop iron assembly 7, and the magnetic force generated will move the valve core 6 upward. When the valve core 6 moves upward, the sealing gasket 601 on the upper end surface of the valve core 6 will block the air outlet of the air inlet channel 701. Since an air outlet boss 702 is provided at the outlet of the air inlet channel 701, the diameter of the air outlet boss 702 is smaller than the diameter of the sealing gasket 601. When the valve core 6 moves upward, the air outlet boss 702 abuts against the upper sealing gasket 601. Under the action of the upward suction force, the sealing gasket 601 will seal the air outlet boss 702, thereby achieving the sealing effect of controlling the air outlet channel. At this time, the air channel 101 arranged at the bottom of the shell 1 is connected with the air release channel 201 through the through hole 602 on the valve core 6, so as to ensure the stability of the natural gas pressure in the air channel 101. When the pressure of the air channel 101 needs to be supplemented, the coil assembly 8 is powered off, and the valve core 6 moves downward under the action of the spring 9, and the sealing gasket 601 on the lower end surface acts on the air release boss 202 to close the air release channel 201. At this time, the air inlet channel 701 and the air channel 101 form a passage on the upper part of the valve core 6 to achieve two-position three-way control. The height of the active cavity is slightly higher than the height of the valve core 6, and a support platform 203 of the valve core 6 is arranged at the bottom of the active cavity. The height of the support platform 203 is slightly lower than the height of the air release boss 202, which does not affect the movement of the valve core 6 to ensure the sealing effect, and corrects the horizontal position of the valve core 6. At the same time, it also reduces the moving distance of the valve core 6, extends the service life of the valve core 6, and enhances reliability. The on and off of the coil assembly 8 is used to drive the movement of the valve core 6, changing the connectivity between the air intake channel 701 and the air channel 101 and the air discharge channel 201, thereby adjusting the flow direction and flow of the gas, reducing the movement distance of the valve core 6, ensuring a quick response, reducing the gap, improving the stability and durability of the solenoid valve, and achieving efficient and stable gas control.

[0024] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0027] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A two-position three-way solenoid valve, comprising a housing, characterized in that: An iron stop assembly is provided in the middle position of the shell, an air intake channel is provided at the axial position of the iron stop assembly, a coil assembly is provided on the outer side of the iron stop assembly, a valve seat is provided at the lower part of the shell, an active cavity is provided at the upper part of the valve seat, a valve core is provided inside the active cavity, an air leakage channel is provided in the middle position of the valve seat, and an air channel connected to the active cavity is provided at the bottom of the shell.

2. The two-position three-way solenoid valve according to claim 1, characterized in that: A support ring is arranged at the bottom of the iron stop assembly, and the coil assembly is arranged on the upper part of the support ring.

3. The two-position three-way solenoid valve according to claim 2, characterized in that: The coil assembly is provided with at least two groups and is relatively arranged on both sides of the coil assembly. An iron stop fixing ring is arranged above the coil assembly, an insulating pad is arranged above the iron stop fixing ring, and a pin connected to the coil assembly is arranged inside the insulating pad.

4. The two-position three-way solenoid valve according to claim 1, characterized in that: An air outlet boss is arranged at the bottom of the iron stop assembly, the air outlet of the air inlet channel is arranged at the middle position of the air outlet boss, an air leakage boss is arranged at the bottom of the active cavity, and the inlet position of the air leakage channel is arranged at the middle position of the air leakage boss.

5. The two-position three-way solenoid valve according to claim 1, characterized in that: The iron stop assembly is made of magnetic conductive material, and a convex ring is provided at the lower part of the iron stop assembly to be clamped with the iron stop fixing ring.

6. The two-position three-way solenoid valve according to claim 2, characterized in that: A groove pointing upward is arranged on one side of the bottom of the support ring near the stop iron assembly, and the air channel is communicated with the active cavity through the groove.

7. The two-position three-way solenoid valve according to claim 1, characterized in that: The upper end surface and the lower end surface of the valve core are provided with sealing gaskets, the valve core is provided with a through hole connecting the upper part and the lower part of the valve core, and the bottom of the stop iron assembly is provided with a spring, and the spring abuts against the valve core.

8. The two-position three-way solenoid valve according to claim 1, characterized in that: The bottom of the shell is provided with a skirt connected with the valve seat, and the top of the skirt is provided with a sealing ring at the connection between the top and the shell.

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