Electromagnetic valve with improved service life

Abstract

The utility model discloses an electromagnetic valve that improves service life, which comprises a valve body and a horizontally movable valve core, the valve body is provided with a first port on one side and a second port and a third port in communication on the other side, a filtering assembly is embedded in the inlet of each port, the filtering assembly comprises a supporting sleeve and a connecting sleeve screwed to the inner wall thereof, and a first filter screen, a second filter screen and a third filter screen are sequentially arranged in the supporting sleeve from top to bottom. The granular impurities in the inner wall of the valve core channel are scraped off by the eradication part, the diameter becomes smaller with abrasion, the acting part compensates for the lost gap of the reaction force, prevents the valve core from contacting the inner wall and reduces its abrasion, the three-layer filter screens filter large particles, fine particles and ferromagnetic substances in stages, avoid impurities from entering the valve core, improve the running stability, the filtering assembly is convenient to disassemble and assemble, enhances the filtering reliability and is suitable for various working conditions.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, and in particular to a solenoid valve with improved service life. Background Technology

[0002] A solenoid valve is a component used to control parameters such as the direction, flow rate, and velocity of fluids. In industrial control systems, it is commonly used as a check valve, safety valve, directional control valve, and speed control valve.

[0003] A solenoid valve includes a valve body, a movable valve core housed within the valve body, and a movable iron core that drives the movable valve core. A clearance is maintained between the movable valve core and the inner wall of the valve body. When impurities are present in the fluid, they may enter this clearance, causing obstruction of the valve core's movement and increased wear on the movable iron core. This affects the normal operation of the solenoid valve and reduces its service life. This problem is particularly prominent in applications where the fluid contains particulate matter or impurities, adversely impacting equipment stability and maintenance frequency. Furthermore, the accumulation of impurities within the clearance may lead to a decrease in sealing performance, further affecting the control accuracy and response speed of the solenoid valve. Therefore, it is necessary to improve the existing structure to enhance the adaptability and reliability of the solenoid valve under complex operating conditions. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of traditional solenoid valve designs and provide a product that improves operational reliability and extends service life.

[0005] An improved service life solenoid valve includes a valve body and a horizontally movable valve core. The valve body has a first port on one side and a second and third port on the other side. A filter assembly is embedded in the inlet of each port. The filter assembly includes a support sleeve and a connecting sleeve threaded to its inner wall. The support sleeve contains, from top to bottom, a first filter screen, a second filter screen, and a third filter screen. The connecting sleeve applies downward pressure to the first filter screen. The first filter screen intercepts large particles; the second filter screen intercepts fine particles; and the third filter screen adsorbs magnetic substances. The outer wall of the movable valve core has at least one sealing element located between the first and second ports, and between the first and third ports. The sealing element has inclined scraping portions on both sides, protruding from the outer wall of the movable valve core. The inner wall of the sealing element has an actuating portion, causing the scraping portions to fit tightly against the inner wall of the valve body, while the actuating portion abuts against the interior of the movable valve core.

[0006] Preferably, the valve body is provided with a valve core channel for the movement of the valve core, and the valve core channel is respectively provided with a first chamber, a second chamber, and a third chamber connecting a first port, a second port, and a third port.

[0007] Preferably, one end of the valve body is provided with a coil assembly, and the other end is provided with a return spring that acts on the moving valve core. The coil assembly contains a driving iron core.

[0008] Preferably, the inlets of the first port, the second port, and the third port are provided with countersunk holes.

[0009] Preferably, the support sleeve is threaded to the first port, the second port, and the third port, and a spacer ring is provided between the first filter screen and the second filter screen, and between the second filter screen and the third filter screen, to form a space for media to flow and for impurities to be retained.

[0010] Preferably, the end of the connecting sleeve is provided with a radially expanding extension, which is provided with a plurality of operating grooves evenly distributed around its circumference. The bottom of the extension is provided with a sealing part and is disposed in a countersunk hole. The sealing part is sleeved on the outer wall of the support sleeve. An O-ring is provided between the sealing part and the support sleeve. The bottom of the support sleeve is provided with a support part for supporting the third filter screen. The support part is provided with a through hole for fluid and gas media to pass through.

[0011] Preferably, the outer wall of the moving valve core is provided with a groove to prevent the seal from shifting, and the groove is provided with a cavity for the mating part.

[0012] Preferably, the first filter screen is a stainless steel filter screen, the second filter screen is a stainless steel powder sintered filter screen, and the third filter screen is a magnetic filter screen. Beneficial effects

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) In this utility model, the scraping part removes particulate impurities attached to the inner wall of the valve core channel. As the scraping part is gradually worn, its diameter becomes smaller. The reaction force of the action part compensates for the reduced spacing of the scraping part, thereby keeping the scraping part in close contact with the inner wall of the valve core channel, preventing the moving valve core from directly contacting the inner wall of the valve core channel, reducing the risk of wear. This structural design helps to maintain the stability of the moving valve core movement and extend the overall service life.

[0014] (2) This utility model uses three layers of filter screens to filter large particles, fine particles and ferromagnetic materials in a graded manner, so as to prevent impurities from entering the valve core channel with the fluid or gas medium and prevent the valve body components from being contaminated, thereby improving the overall operational stability. The filter screen is fixed by applying pre-tightening force through the connecting sleeve, which enhances the stability of the filter structure and prevents the filter screen from shifting and creating gaps due to vibration or pressure fluctuations. The spacer ring design provides space for impurities to remain, reduces the frequency of clogging, and extends the maintenance cycle. The filter assembly adopts a threaded connection structure and is equipped with an operating groove to achieve quick disassembly and assembly, which is convenient for daily maintenance and replacement. This structural design helps to improve the filtration efficiency and system reliability and adapt to the use needs under various working conditions. Attached Figure Description

[0015] Figure 1 This is a side cross-sectional view of the electromagnetic valve of the present invention, which has an improved service life. Figure 2 This utility model Figure 1 A partial enlarged view A of a solenoid valve designed to improve service life; Figure 3 This utility model Figure 1 A partial enlarged view (B) of a solenoid valve designed to improve service life; Figure 4 This is an exploded view of an electromagnetic valve with improved service life according to the present invention. The correspondence between the labels and component names in the attached figures is as follows: Reference numerals: 1. Valve body; 2. Moving valve core; 3. Filter assembly; 4. Seal; 5. Coil assembly; 6. Return spring; 11. First port; 12. Second port; 13. Third port; 14. Valve core channel; 15. Countersunk hole; 141. First chamber; 142. Second chamber; 143. Third chamber; 21. Groove; 22. Cavity; 31. Support sleeve; 32. Connecting sleeve; 33. First filter screen; 34. Second filter screen; 35. Third filter screen; 36. Spacer ring; 37. O-ring seal; 311. Support part; 312. Through hole; 321. Extension; 322. Operating groove; 323. Sealing part; 41. Removal part; 42. Functional part; 51. Drive iron core. Detailed Implementation

[0016] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0019] Reference example Figures 1 to 4 A solenoid valve with improved service life includes a valve body 1 and a horizontally movable valve core 2. The valve body 1 has a first port 11 on one side and a second port 12 and a third port 13 communicating with each other on the other side. A filter assembly 3 is embedded at the inlet of each port. The filter assembly 3 includes a support sleeve 31 and a connecting sleeve 32 threaded to its inner wall. A first filter screen 33, a second filter screen 34, and a third filter screen 35 are sequentially arranged from top to bottom inside the support sleeve 31. The connecting sleeve 32 applies downward pressure to the first filter screen 33. The first filter screen 33 is used to intercept large particulate media; the second filter screen 34 is used to intercept fine particulate media; the third filter screen 35 is used to adsorb magnetic substances. The outer wall of the moving valve core 2 is provided with at least one sealing element 4, which is located between the first port 11 and the second port 12, and between the first port 11 and the third port 13. The sealing element 4 has inclined scraping parts 41 on both sides, which protrude from the outer wall of the moving valve core 2. The inner wall of the sealing element 4 is provided with an action part 42, so that the scraping part 41 fits tightly against the inner wall of the valve body 1, while the action part 42 abuts against the inside of the moving valve core 2. The three-layer filter screen effectively filters large particles, fine particles, and ferromagnetic substances, preventing impurities from entering the valve core channel 14 with the fluid or gas medium and preventing contamination of the components inside the valve body 1. This improves overall operational stability. The filter screen is fixed by a pre-tightening force applied by the connecting sleeve 32, enhancing the stability of the filter structure and preventing displacement and gaps caused by vibration or pressure fluctuations. The spacer ring 36 provides space for impurities to remain, reducing clogging frequency and extending maintenance cycles. The filter assembly 3 adopts a threaded connection structure, which, together with the operating groove 322, allows for quick assembly and disassembly, facilitating daily maintenance and replacement. This structural design helps improve filtration efficiency and system reliability, adapting to various operating conditions. It is worth mentioning that the valve body 1 is provided with a valve core channel 14 for the movement of the valve core 2. The valve core channel 14 is provided with a first chamber 141, a second chamber 142, and a third chamber 143 respectively, which are connected to the first port 11, the second port 12, and the third port 13. It is worth mentioning that one end of the valve body 1 is provided with a coil assembly 5, and the other end is provided with a return spring 6, which acts on the moving valve core 2. The coil assembly 5 is provided with a driving iron core 51. When the coil assembly 5 is energized, the driving iron core 51 is affected by magnetic force and drives the moving valve core 2 to move towards the other end of the valve body 1, so that the return spring 6 is squeezed and stores energy, so that the first port 11 is connected to the second port 12. When the coil assembly 5 is de-energized, the return spring 6 and the spring in the coil assembly 5 drive the moving valve core 2 and the driving iron core 51 to quickly reset, so that the first port 11 is connected to the third port 13. It is worth mentioning that the inlets of the first port 11, the second port 12, and the third port 13 are provided with countersunk holes 15, which prevent the filter assembly 3 from protruding too much from the valve body 1. It is worth mentioning that the support sleeve 31 is threaded to the first port 11, the second port 12, and the third port 13. A spacer ring 36 is provided between the first filter screen 33 and the second filter screen 34, and between the second filter screen 34 and the third filter screen 35, forming a space for the medium to flow and for impurities to be retained. The connecting sleeve 32 applies downward pressure to the first filter screen 33, so that the adjacent filter screens are tightly fitted with the spacer ring 36, and the third filter screen 35 is pressed onto the support part 311. It is worth mentioning that the end of the connecting sleeve 32 is provided with a radially expanding extension 321, which has a plurality of operating grooves 322 evenly distributed around its circumference. The bottom of the extension 321 is provided with a sealing part 323 and is disposed in the countersunk hole 15. The sealing part 323 is sleeved on the outer wall of the support sleeve 31. An O-ring seal 37 is provided between the sealing part 323 and the support sleeve 31. The bottom of the support sleeve 31 is provided with a support part 311 for supporting the third filter screen 35. The support part 311 is provided with a through hole 312 for fluid or gas medium to pass through. The O-ring seal 37 is used to prevent fluid or gas medium from leaking from the support sleeve 31 and the inner wall of the port. The sealing part 323 and the countersunk hole 15, as well as the sealing part 323 and the support sleeve 31, are connected. A radial seal is formed between the sleeves 31, improving the overall sealing effect. When disassembling the filter assembly 3, insert the tool into the operating groove 322 and loosen it. After the support sleeve 31 is separated from the port, place the support sleeve 31 on the clamping fixture, and then loosen the connecting sleeve 32, thereby realizing the disassembly of the first filter screen 33, the second filter screen 34 and the third filter screen 35. This structural design ensures stable sealing performance, facilitates maintenance and replacement, and improves the ease of operation and system reliability. In addition, the use of the clamping fixture can enhance the stability during the disassembly process and avoid component deformation or damage. Since the clamping fixture is existing technology, it will not be described in detail here. The clamping fixture can be a milling machine fixture. It is worth mentioning that the outer wall of the moving valve core 2 is provided with a groove 21 to prevent the seal 4 from being displaced. The groove 21 is provided with a cavity 22 that matches the action part 42. The scraping part 41 scrapes away particulate impurities attached to the inner wall of the valve core channel 14. As the scraping part 41 is gradually worn, its diameter becomes smaller. The reaction force of the action part 42 compensates for the gap of the reduced diameter of the scraping part 41, thereby keeping the scraping part 41 in close contact with the inner wall of the valve core channel 14, preventing the moving valve core 2 from directly contacting the inner wall of the valve core channel 14, reducing the risk of wear. This structural design helps to maintain the stability of the movement of the moving valve core 2 and extend the overall service life. It is worth mentioning that the first filter screen 33 is a stainless steel filter screen, the second filter screen 34 is a stainless steel powder sintered filter screen, and the third filter screen 35 is a magnetic filter screen.

[0020] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A solenoid valve with improved service life, comprising a valve body (1) and a horizontally movable moving valve core (2), characterized in that: The valve body (1) has a first port (11) on one side and a second port (12) and a third port (13) connected on the other side. A filter assembly (3) is embedded in the inlet of each port. The filter assembly (3) includes a support sleeve (31) and a connecting sleeve (32) threaded to its inner wall. The support sleeve (31) contains, from top to bottom, a first filter screen (33), a second filter screen (34), and a third filter screen (35). The connecting sleeve (32) applies downward pressure to the first filter screen (33), which is used to intercept large particles. The second filter screen (34) is used to intercept fine particulate media; the third filter screen (35) is used to adsorb magnetic substances. The outer wall of the moving valve core (2) is provided with at least one sealing element (4), which is located between the first port (11) and the second port (12), and between the first port (11) and the third port (13). The sealing element (4) has inclined scraping parts (41) on both sides, which protrude from the outer wall of the moving valve core (2). The inner wall of the sealing element (4) is provided with an action part (42), so that the scraping part (41) fits tightly against the inner wall of the valve body (1), and the action part (42) abuts against the inside of the moving valve core (2).

2. The solenoid valve with improved service life according to claim 1, characterized in that: The valve body (1) is provided with a valve core channel (14) for the valve core (2) to move. The valve core channel (14) is provided with a first chamber (141), a second chamber (142), and a third chamber (143) respectively connecting the first port (11), the second port (12), and the third port (13).

3. The solenoid valve with improved service life according to claim 1, characterized in that: One end of the valve body (1) is provided with a coil assembly (5) and the other end is provided with a reset spring (6), which acts on the moving valve core (2). The coil assembly (5) is provided with a driving iron core (51).

4. The solenoid valve with improved service life according to claim 1, characterized in that: The first port (11), the second port (12), and the third port (13) are provided with countersunk holes (15).

5. The solenoid valve with improved service life according to claim 1, characterized in that: The support sleeve (31) is threaded to the first port (11), the second port (12), and the third port (13). A spacer ring (36) is provided between the first filter screen (33) and the second filter screen (34), and between the second filter screen (34) and the third filter screen (35), forming a space for the medium to flow and for impurities to be retained.

6. The solenoid valve with improved service life according to claim 4, characterized in that: The end of the connecting sleeve (32) is provided with a radially expanding extension (321), which is provided with a plurality of operating grooves (322) evenly distributed around its circumference. The bottom of the extension (321) is provided with a sealing part (323) and is provided in the countersunk hole (15). The sealing part (323) is sleeved on the outer wall of the support sleeve (31). An O-ring (37) is provided between the sealing part (323) and the support sleeve (31). The bottom of the support sleeve (31) is provided with a support part (311) for supporting the third filter screen (35). The support part (311) is provided with a through hole (312) for fluid and gas media to pass through.

7. The solenoid valve with improved service life according to claim 1, characterized in that: The outer wall of the moving valve core (2) is provided with a groove (21) to prevent the seal (4) from being displaced, and the groove (21) is provided with a cavity (22) for the mating part (42).

8. The solenoid valve with improved service life according to any one of claims 2 to 7, characterized in that: The first filter screen (33) is a stainless steel filter screen, the second filter screen (34) is a stainless steel powder sintered filter screen, and the third filter screen (35) is a magnetic filter screen.

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