Miniature electromagnetic valve

Abstract

The utility model discloses a miniature electromagnetic valve which comprises a coil assembly and a valve body which are mutually fixed, and the coil assembly comprises a movable iron core. A valve port piece, a double-face plug, a plug support and a fixing piece are arranged in the valve body. A valve port communicated with the air inlet is formed in the opposite bottom of the valve port piece; the upper end face of the double-face plug corresponds to the valve port, and the lower end face corresponds to the exhaust port. The plug support is connected with the double-face plug, the top end of the plug support is provided with a push rod movably penetrating through the valve port piece, the push rod abuts against the lower end face of the movable iron core, and the movement of the movable iron core corresponds to the movement of the double-face plug. The fixing piece abuts against the side face of the valve port piece and is used for radial limiting of the valve port piece. According to the electromagnetic valve, the fixing piece is arranged to support the valve port piece, the valve port piece is limited in the radial direction, and the problems that internal parts of the electromagnetic valve fall off, displace and are not easy to assemble are solved on the premise that the appearance size is not increased and the internal structure is not changed greatly.

Description

Technical Field

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

[0002] Miniature solenoid valves used for pneumatic control have many small internal parts, commonly including sealing rings, valve ports, plug supports, rubber plugs, springs, etc. In particular, the connection between the valve port and the air intake channel contains a very small sealing ring to ensure a tight seal. When the existing valve port is installed inside the valve body, it is highly susceptible to displacement during assembly and handling, causing the sealing ring to loosen or fall off, leading to product failure. Utility Model Content

[0003] The purpose of this invention is to provide a miniature solenoid valve to solve the problems existing in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a miniature solenoid valve, comprising a coil assembly and a valve body fixed to each other, the coil assembly including a moving iron core, the valve body having an air inlet, a working port, and an exhaust port; the valve body having a valve port component, a double-sided plug, a plug bracket, and a fixing component; the valve port component is fixed to the valve body, and the bottom of the valve port component has a valve port communicating with the air inlet; the upper end face of the double-sided plug corresponds to the valve port, and the lower end face corresponds to the exhaust port, and the bottom of the double-sided plug has a plug spring; the plug bracket is connected to the double-sided plug, and the top of the plug bracket has a push rod that moves through the valve port component, the push rod abutting against the lower end face of the moving iron core, corresponding the movement of the moving iron core to the movement of the double-sided plug; the fixing component abutting against the side of the valve port component for radial limiting of the valve port component.

[0005] Preferably, the coil assembly includes a housing, a coil, a stationary iron core, and a moving iron core extending into the valve body. A moving iron core spring is provided between the moving iron core and the housing, and the moving iron core spring provides an elastic force that causes the moving iron core to have a downward tendency to move.

[0006] Preferably, the top end of the moving iron core has an inwardly opening spring mounting hole, and the moving iron core spring is disposed within the spring mounting hole. Preferably,

[0007] Preferably, the top edge of the valve port is provided with a guide support structure extending upward, and the top end of the guide support structure abuts against the lower end face of the coil assembly; the inner contour of the guide support structure matches the moving iron core, and the outer contour matches the inner surface of the valve body.

[0008] Preferably, the valve port is provided with an L-shaped air intake channel, one end of which is the valve port and the other end is the valve port air inlet located on the side of the valve port, and the valve port air inlet is connected to the air inlet of the valve body.

[0009] Preferably, the valve inlet is provided with a sealing ring.

[0010] Preferably, the fixing member is located on the side of the valve port that is away from the valve port inlet.

[0011] Preferably, the outer side of the fixing member is fitted with the inner surface of the valve body, and the inner side is fitted with the valve port.

[0012] Preferably, the plug bracket is provided with a groove for accommodating a double-sided plug, and the double-sided plug is embedded in the groove.

[0013] Preferably, there are two push rods, symmetrically distributed on both sides of the plug bracket.

[0014] Compared with the prior art, the advantages of this utility model are as follows:

[0015] 1. This utility model provides support for the valve port by setting a fixing component and radially limiting the valve port. On the one hand, it helps to fix the components in the valve body and improve stability. On the other hand, it can avoid the problem of loosening or displacement of the valve port during transportation or assembly, which would lead to the failure of the sealing ring. Without increasing the external size and without major changes to the internal structure, it solves the problems of internal parts falling off, shifting, and being difficult to assemble in solenoid valves.

[0016] 2. In a preferred embodiment of this utility model, the top of the valve port is integrally provided with a guide support structure. The valve port can be axially fixed by the fixed connection between the coil assembly and the valve port, without the need for additional axial fixing components, thus simplifying the internal structure and the number of parts.

[0017] 3. In a preferred embodiment of this utility model, the double-sided plug is embedded in the plug bracket for easy assembly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is an exploded structural diagram of the present invention.

[0020] Figure 3 This is a structural schematic diagram of the cable package component in this utility model.

[0021] Figure 4 This is a top view of the valve body in this utility model.

[0022] Figure 5 This is a cross-sectional view of the valve body in this utility model.

[0023] Figure 6 This is a structural schematic diagram of the valve port and plug bracket in this utility model.

[0024] Figure 7 This is a schematic diagram of the valve port component in this utility model.

[0025] Figure 8 This is an assembly diagram of the plug bracket and the double-sided plug in this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following embodiments will provide a more detailed description of this utility model.

[0027] Example: A miniature solenoid valve, referenced Figure 1-8 The system includes a valve body 7 and a coil assembly 1 fixed above the valve body 7. The coil assembly 1 includes a housing 2 and a coil 3, a stationary iron core 4, and a moving iron core 5 disposed within the housing 2. The moving iron core 5 extends partially into the valve body 7, and a moving iron core spring 6 is provided between the moving iron core 5 and the stationary iron core 4. This allows the moving iron core 5 to tend to move downward under the action of the moving iron core spring 6 when the power is off. When the coil is energized, the moving iron core 5 moves upward against the spring force. In this embodiment, a spring mounting hole is provided at the top of the moving iron core 5, and the moving iron core spring 6 is disposed in the spring mounting hole. The moving iron core spring 6 is constrained by the spring mounting hole, which increases the structural stability and simplifies installation.

[0028] The internal space of the valve body 7 is shaped like a waist hole, and the side is provided with an air inlet 8, a working port 9 and an exhaust port 10 in sequence. The cavity of the valve body 7 is provided with a valve port component 11, a plug bracket 12, a double-sided plug 13 and a plug spring 14 in sequence from top to bottom.

[0029] The valve port 11 is provided with an L-shaped air intake channel. One end of the air intake channel is located on the bottom end face of the valve port 15, and the other end is the valve port air inlet located on the side of the valve port 11. The valve port air inlet is connected to the air inlet 8 of the valve body, and a sealing ring 16 is provided at the valve port air inlet, so that the valve port 15 can be connected to the air inlet 8.

[0030] In the above structure, the cross-sectional shape of the valve port 11 is roughly square, and its two sides match the two waist planes of the waist hole in the valve body. A fixing member 17 is provided on the side away from the valve port air inlet. The outer side of the fixing member 17 is arc-shaped and fits with the arc part of the inner surface of the valve body. The inner side of the fixing member 17 fits with the contact position of the valve port 11. The fixing member 17 plays the role of supporting the valve port 11 at the end away from the valve port air inlet, thereby playing a certain role of pressing the sealing ring 16 and preventing the sealing ring 16 from loosening during handling or assembly.

[0031] In addition, the top edge of the valve port 11 extends upward integrally with a guide support structure 18. The top end of the guide support structure 18 abuts against the lower end face of the coil assembly 1, thereby achieving axial positioning. The inner contour of the guide support structure 18 matches the moving iron core 5 to guide the movement of the moving iron core 5. The outer contour is consistent with the valve port 11.

[0032] The plug bracket 12 is provided with a groove for the double-sided plug 13 to be inserted. During installation, the double-sided plug 13 can be pre-inserted into the groove to prevent it from falling out. The top of the double-sided plug 13 is symmetrically provided with two push rods 19 that can move through the valve port. The push rods 19 abut against the lower end face of the moving iron core 5, so that the movement of the moving iron core 5 corresponds to the movement of the double-sided plug 13, thereby controlling the movement of the double-sided plug 13 through the movement of the moving iron core 5.

[0033] The plug spring 14 is disposed between the double-sided plug 13 and the bottom surface of the valve body cavity, so that the double-sided plug 13 has an upward tendency when no external force is applied.

[0034] The upper end face of the double-sided plug 13 corresponds to the valve port 15, so that the double-sided plug 13 can block the valve port 15 when it moves upward; the lower end face of the double-sided plug 13 corresponds to the exhaust port 10 located at the other end of the valve body, so that the double-sided plug 13 can block the exhaust port 10 when it moves downward.

[0035] When the solenoid valve is de-energized, the moving iron core 5, under the elastic force of the moving iron core spring 6, pushes the push rod 19, causing the double-sided plug 13 to move downward and block the exhaust port 10. At this time, the air inlet 8 and the working port 9 are connected to allow air intake. When the solenoid valve is energized, under the action of electromagnetic force, the moving iron core 5 moves upward, and the double-sided plug 13, under the elastic force of the plug spring 14, moves upward and blocks the valve port 15. At this time, the working port 9 and the exhaust port 10 are connected to allow exhaust.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A micro electromagnetic valve, comprising a fixed coil assembly and a valve body, the fixed coil assembly comprising a moving iron core, the valve body being provided with an inlet port, a working port and an exhaust port; characterized in that, the valve body is provided with a valve port piece, a double-sided plug, a plug support and a fixing piece; the valve port piece is fixed in the valve body, and opposite bottom portions of the valve port piece are provided with valve ports in communication with the inlet port; the double-sided plug is provided with a plug spring at a bottom portion thereof, and upper and lower end faces of the double-sided plug correspond to the valve port and the exhaust port, respectively; the plug support is connected with the double-sided plug, and a push rod movably penetrating the valve port piece is provided at a top end of the plug support, the push rod abutting against a lower end face of the moving iron core to correspond the movement of the moving iron core to the movement of the double-sided plug; the fixing piece abuts against a side face of the valve port piece to limit the radial movement of the valve port piece.

2. A microsolenoid valve according to claim 1, wherein the fixed coil assembly comprises a housing, a coil, a static iron core and a moving iron core extending into the valve body, a moving iron core spring is provided between the moving iron core and the housing, and the moving iron core spring provides an elastic force for the moving iron core to have a downward movement tendency.

3. A microsolenoid valve according to claim 2, wherein a spring mounting hole is formed in a top end of the moving iron core, and the moving iron core spring is arranged in the spring mounting hole.

4. A micro electromagnetic valve according to claim 1, wherein a guide support structure is provided at a top edge of the valve port piece, a top end of the guide support structure abutting against a lower end face of the fixed coil assembly, an inner profile of the guide support structure matching the moving iron core, and an outer profile of the guide support structure matching an inner side surface of the valve body.

5. A micro electromagnetic valve according to claim 1 or 4, wherein an L-shaped inlet channel is provided in the valve port piece, one end of the inlet channel being the valve port, and the other end being an inlet port of the valve port located at a side face of the valve port piece, the inlet port of the valve port being in communication with the inlet port of the valve body.

6. A microsolenoid valve according to claim 5, wherein the inlet port of the valve port is provided with a sealing ring.

7. A microsolenoid valve according to claim 5, wherein the fixing piece is arranged at a side of the valve port piece away from the inlet port of the valve port.

8. A microsolenoid valve according to claim 7, wherein an inner side of the fixing piece is in contact with the valve port piece, and an outer side of the fixing piece is in contact with an inner surface of the valve body.

9. A micro electromagnetic valve according to claim 1, wherein the plug support is provided with a groove accommodating the double-sided plug, and the double-sided plug is embedded in the groove.

10. A micro electromagnetic valve according to claim 1, wherein the number of the push rods is two, and the push rods are symmetrically distributed at two sides of the plug support.

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