Miniature electromagnetic valve fixing structure with contact

Abstract

The utility model relates to the field of miniature electromagnetic valves, in particular to a miniature electromagnetic valve fixing structure with a contact, which comprises a front end cover, a valve body in threaded connection with one end of the front end cover, six oil inlet inclined holes axially distributed on the outer side of the valve body, a valve core in sliding connection with the inner part of the valve body, and an electromagnetic guide structure arranged at one end of the valve body. The electromagnetic guide structure comprises a rear valve seat and a coil; a sleeve in sliding connection is further arranged in the rear valve seat; high-precision oil way control is achieved through the collaborative design of a multi-layer sealing structure and electromagnetic drive, the front end cover and the valve body are combined in an O-shaped ring sealing mode to ensure static sealing reliability, and a sealing ring is arranged between the valve element and the valve body to form a dynamic sealing barrier. The electromagnetic drive of the movable iron core and the static iron core is matched with the bidirectional reset mechanism of the tower-shaped spring and the telescopic spring, and the oil pressure balance design of the six oil inlet inclined holes is combined, so that quick response and stable opening and closing of the electromagnetic valve are achieved.

Description

Technical Field

[0001] This utility model relates to the field of miniature solenoid valves, and in particular to a miniature solenoid valve with a contact fixing structure. Background Technology

[0002] A solenoid valve is an automated actuator that uses electromagnetic principles to control the on / off state or flow direction of fluids (gas or liquid). It mainly consists of a coil, valve body, valve core (armature), and return spring. When the coil is energized, it generates electromagnetic force to drive the valve core, changing the opening and closing state of the valve port to achieve rapid start / stop, reversal, or flow regulation of the fluid. After de-energization, it returns to its original position by the spring or the pressure of the medium. It features fast response (milliseconds), good sealing, and small size, and is widely used in industrial automation (such as pneumatic control and hydraulic systems), home appliances (washing machines, water purifiers), medical equipment, and automobiles.

[0003] In existing technologies, the reset of the electromagnetic drive components of solenoid valves mostly relies on a single spring. After long-term use, the spring is prone to fatigue, which can lead to delayed action or jamming. In addition, the conventional solenoid valve pin fixing method is relatively weak and is prone to poor contact due to vibration or insertion and removal. Electrical connection components also mostly lack multiple sealing protection, and are prone to short circuits due to oil contamination after long-term use. As a result, existing solenoid valves have problems such as short service life and high maintenance costs.

[0004] To address the aforementioned technical shortcomings, a solution is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a miniature solenoid valve with a contact fixing structure to solve the aforementioned technical defects.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A miniature solenoid valve with a contact fixing structure includes a front end cover, a valve body with a threaded connection at one end of the front end cover, six axially distributed oil inlet oblique holes on the outer side of the valve body, a valve core with a sliding connection inside the valve body, and an electromagnetic guiding structure at one end of the valve body, the electromagnetic guiding structure including a rear valve seat and a coil.

[0008] The rear valve seat is further provided with a sliding sleeve inside, and a sliding moving iron core inside the sleeve. One end of the rear valve seat is provided with a threaded plug socket, and symmetrically distributed pins are installed inside the plug socket.

[0009] Preferably, a nozzle is provided inside the front end cover, an O-ring three is fitted on the outside of the front end cover, an O-ring four is installed between the valve body and the front end cover, a sealing ring is fitted on the outside of the valve core, and O-ring five and O-ring six are fitted on the outside of the valve body.

[0010] Preferably, the rear valve seat and the valve body are connected by threads, the coil is located inside the rear valve seat and is fixedly connected to the rear valve seat, an O-ring is installed between the rear valve seat and the valve body, a sealing strip is placed inside the moving iron core near the front end cover, and a cotter pin is also provided inside the moving iron core for fixed connection. The cotter pin passes through the moving iron core and the sealing strip and limits the moving iron core and the sealing strip.

[0011] Preferably, a tower-shaped spring is placed between the cotter pin and the rear valve seat, and a coil washer is fixedly connected to the end of the coil away from the front end cover. The coil washer has an internal mounting shaft, and a shaft retaining ring is fixedly installed on the outer side of one end of the mounting shaft. The shaft retaining ring is used to limit the movement of the mounting shaft, and a telescopic spring is placed at the other end of the mounting shaft.

[0012] Preferably, the other end of the telescopic spring is provided with a stationary iron core, the telescopic spring is in contact with the stationary iron core and the mounting shaft, and the other end of the stationary iron core is in contact with the moving iron core and the sleeve.

[0013] Preferably, an O-ring is installed between the plug socket and the rear valve seat, an E-type open retaining ring is installed on the outside of the pin, and an O-ring is provided between the pin and the plug socket.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model achieves high-precision oil circuit control through a multi-layer sealing structure and electromagnetic drive collaborative design. The O-ring seal combination between the front cover and the valve body ensures static sealing reliability, and the sealing ring between the valve core and the valve body forms a dynamic sealing barrier. By using electromagnetic drive with moving iron core and stationary iron core in combination with the bidirectional reset mechanism of tower spring and telescopic spring, combined with the oil pressure balance design of six oil inlet oblique holes, the electromagnetic valve achieves fast response and stable opening and closing.

[0016] 2. The plug socket of this utility model has a built-in gold-plated pin that is locked in position by an E-type open retaining ring, and works with a conductive spring-loaded top-pressure power supply interface to effectively improve the stability of electrical connection. Through the precise matching of the electromagnetic force of the coil and the spring force, the valve core is completely locked by the spring preload when the power is off, and the oil circuit is precisely opened by electromagnetic drive when the power is on. This gives the device the advantages of excellent sealing performance, high sensitivity of action, strong resistance to oil contamination, and long service life. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings;

[0018] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of the connection structure between the front cover, valve body and valve core in this utility model;

[0020] Figure 3 This is a cross-sectional schematic diagram of the connection structure between the rear valve seat, the plug seat, and the pin in this utility model;

[0021] Figure 4 This is a diagram showing the state of the nozzle spraying oil when the coil is energized in this utility model.

[0022] Figure 5 This is a diagram showing the state in which the coil is not energized and the nozzle cannot spray oil in this utility model.

[0023] Legend: 1. Front cover; 11. Valve body; 111. Oil inlet oblique hole; 12. Valve core; 13. Sealing ring; 14. Moving iron core; 15. Cotter pin; 16. Sealing strip; 17. Tower spring; 18. Sleeve; 19. Rear valve seat; 20. Coil; 21. Stationary iron core; 22. Telescopic spring; 23. Coil gasket; 24. Shaft retaining ring; 25. O-ring one; 26. Plug socket; 27. O-ring two; 28. E-type open retaining ring; 29. ​​Pin; 30. O-ring three; 31. O-ring four; 32. O-ring five; 33. O-ring six; 34. O-ring seven. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1:

[0026] Please see Figure 1 - Figure 5 As shown, this utility model is a miniature solenoid valve with a contact fixing structure, including a front cover 1, a nozzle is provided inside the front cover 1, an O-ring 30 is fitted on the outside of the front cover 1, a valve body 11 is threadedly connected to one end of the front cover 1, an O-ring 4 31 is installed between the valve body 11 and the front cover 1, the O-ring 4 31 is used to improve the sealing between the valve body 11 and the front cover 1, six axially distributed oil inlet oblique holes 111 are provided on the outside of the valve body 11, a valve core 12 is provided inside the valve body 11, a sealing ring 13 is fitted on the outside of the valve core 12, the sealing ring 13 is used to provide dynamic sealing between the valve body 11 and the valve core 12, and an O-ring 5 32 and an O-ring 6 33 are fitted on the outside of the valve body 11.

[0027] One end of the valve body 11 is provided with an electromagnetic guiding structure, which includes a rear valve seat 19 and a coil 20. The rear valve seat 19 and the valve body 11 are connected by threads. The coil 20 is located inside the rear valve seat 19 and is fixedly connected to the rear valve seat 19. An O-ring 34 is installed between the rear valve seat 19 and the valve body 11. The O-ring 34 is used to improve the sealing between the rear valve seat 19 and the valve body 11. The rear valve seat 19 is also provided with a sliding sleeve 18. The sleeve 18 is provided with a sliding moving iron core 14. A sealing strip 16 is placed inside the moving iron core 14 near the front end cover 1. The moving iron core 14 is also provided with a fixed cotter pin 15. The cotter pin 15 passes through the moving iron core 14 and the sealing strip 16 and limits the moving iron core 14 and the sealing strip 16.

[0028] A tower-shaped spring 17 is placed between the cotter pin 15 and the rear valve seat 19. A coil washer 23 is fixedly connected to the end of the coil 20 away from the front cover 1. The coil washer 23 has a mounting shaft inside. A shaft retaining ring 24 is fixedly installed on the outer side of one end of the mounting shaft. The shaft retaining ring 24 is used to limit the movement of the mounting shaft. A telescopic spring 22 is placed at the other end of the mounting shaft. A stationary iron core 21 is provided inside the other end of the telescopic spring 22. The telescopic spring 22 is in contact with the stationary iron core 21 and the mounting shaft. The other end of the stationary iron core 21 is in contact with the moving iron core 14 and the sleeve 18.

[0029] One end of the rear valve seat 19 has a threaded plug socket 26. An O-ring 25 is installed between the plug socket 26 and the rear valve seat 19. The O-ring 25 is used to improve the sealing between the plug socket 26 and the rear valve seat 19. The plug socket 26 has symmetrically distributed pins 29 installed inside. An E-type open retaining ring 28 is installed on the outside of the pins 29. The E-type open retaining ring 28 is used to lock the position of the pins 29, thereby preventing the pins 29 from moving. The outside of the pins 29 is gold-plated. An O-ring 27 is provided between the pins 29 and the plug socket 26. The O-ring 27 is used to improve the sealing between the pins 29 and the plug socket 26. The pins 29 are electrically connected to the coil 20 through leads. The pins 29 are powered by external conductive springs.

[0030] The working process and principle of this utility model are as follows:

[0031] In use, first contact the pin 29 with the external conductive spring. When there is no power supply at the pin 29, the tower spring 17 and the telescopic spring 22 push the moving iron core 14 and the stationary iron core 21 towards one end of the front cover 1 by their elastic force, thereby blocking the valve core 12 and preventing oil from flowing out of the nozzle. When the pin 29 is powered, the current flows through the lead wire to the coil 20. At this time, the moving iron core 14 and the stationary iron core 21 overcome the elastic force of the tower spring 17 and the telescopic spring 22 and move towards one end closer to the plug socket 26. At this time, the pressure oil outside the six oil inlet oblique holes 111 pushes the valve core 12 towards one end closer to the plug socket 26, and the oil is sprayed out from the nozzle inside the front cover 1.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A micro electromagnetic valve with contact fixing structure comprising a front end cover (1), characterized in that, One end of the front end cover (1) is provided with a threaded valve body (11), the outer side of the valve body (11) is provided with six oil inlet inclined holes (111) distributed in the axial direction, the inside of the valve body (11) is provided with a slidingly connected valve core (12), one end of the valve body (11) is provided with an electromagnetic guide structure, the electromagnetic guide structure comprises a rear valve seat (19) and a coil (20); The inside of the rear valve seat (19) is also provided with a slidingly connected sleeve (18), the inside of the sleeve (18) is provided with a slidingly connected moving iron core (14), one end of the inside of the rear valve seat (19) is provided with a threaded plug seat (26), the inside of the plug seat (26) is mounted with symmetrically distributed plug pins (29).

2. The microsolenoid valve with contact fixation structure according to claim 1, wherein The inside of the front end cover (1) is provided with a nozzle, the outside of the front end cover (1) is provided with an O-ring three (30), the valve body (11) and the front end cover (1) are mounted with an O-ring four (31), the outside of the valve core (12) is provided with a sealing ring (13), the outside of the valve body (11) is provided with an O-ring five (32) and an O-ring six (33).

3. The micro electromagnetic valve with contact fixing structure according to claim 1, characterized in that, The rear valve seat (19) and the valve body (11) are connected through threads, the coil (20) is located in the inside of the rear valve seat (19) and is fixedly connected with the rear valve seat (19), the O-ring seven (34) is mounted between the rear valve seat (19) and the valve body (11), the inside of the moving iron core (14) close to one end of the front end cover (1) is placed with a sealing strip (16), the inside of the moving iron core (14) is also provided with a fixedly connected split pin (15), the split pin (15) penetrates the moving iron core (14) and the sealing strip (16) and limits the moving iron core (14) and the sealing strip (16).

4. The microsolenoid valve with contact fixation structure according to claim 3, wherein The split pin (15) and the rear valve seat (19) are placed with a tower-shaped spring (17), one end of the coil (20) away from the front end cover (1) is provided with a fixedly connected coil gasket (23), the inside of the coil gasket (23) is provided with a mounting shaft, one end of the outside of the mounting shaft is fixedly installed with a shaft check ring (24), the shaft check ring (24) is used for limiting the movement of the mounting shaft, the other end of the mounting shaft is placed with a telescopic spring (22).

5. The microsolenoid valve with contact fixation structure according to claim 4, wherein The other end of the inside of the telescopic spring (22) is provided with a static iron core (21), the telescopic spring (22) is in contact with the static iron core (21) and the mounting shaft, the other end of the static iron core (21) is in contact with the moving iron core (14) and the sleeve (18).

6. The microsolenoid valve with contact fixation structure of claim 1, wherein The plug seat (26) and the rear valve seat (19) are mounted with an O-ring one (25), the outside of the plug pin (29) is mounted with an E-shaped split ring (28), the plug pin (29) and the plug seat (26) are provided with an O-ring two (27).

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