An electromagnetic valve
Patent Information
- Application Number
- CN202522329753.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-03
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-11-03
AI Technical Summary
然而，这种点胶连接方式存在着诸多明显的缺陷，首先，增加点胶工序无疑会延长电磁阀的生产周期，降低生产效率，其次，点胶连接的稳定性较差，在电磁阀长期使用过程中，由于活动铁芯不断地做往复运动，会产生一定的振动和冲击力，这进一步加速了胶水的老化失效，使得卡挡片容易从活动铁芯上脱落
活动铁芯设置有第一嵌合槽和第二嵌合槽，其中，第一止挡片装配在第一嵌合槽内部，第二止挡片装配在第二嵌合槽内部，极大地增强了第一卡挡片、第二卡挡片与活动铁芯之间的连接强度，有效避免了因振动、冲击等因素导致的松动或脱落，确保了连接的高度稳定性。
Smart Images
Figure CN224814493U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electromagnetic valve technology, specifically to an electromagnetic valve. Background Technology
[0002] In automated control systems and fluid handling equipment, solenoid valves are widely used as key switching elements for gas on / off control. However, in most solenoid valves on the market, the connection between the first and second retaining plates and the movable iron core is mainly achieved through a dispensing process. Specifically, during the manufacturing process of solenoid valves, after the basic assembly of the movable iron core, the first and second retaining plates is completed, an additional dispensing process is required. The specific operation involves using specialized dispensing equipment to precisely apply an appropriate amount of adhesive to the contact areas between the first and second retaining plates and the movable iron core. After the adhesive cures, the connection and fixation between the three components are achieved. However, this dispensing connection method has many obvious drawbacks. First, adding the dispensing process will undoubtedly prolong the production cycle of the solenoid valve and reduce production efficiency. Second, the stability of the dispensing connection is poor. During the long-term use of the solenoid valve, the continuous reciprocating motion of the moving iron core will generate a certain vibration and impact force, which will further accelerate the aging and failure of the adhesive, making it easy for the retaining plate to fall off the moving iron core. Utility Model Content
[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a solenoid valve that can effectively solve the technical problems mentioned in the background art.
[0004] The technical solution adopted by this utility model to solve its technical problem is: an electromagnetic valve, including a plastic seat, a coil and a fixed seat, the coil is sleeved on the outside of the plastic seat, the fixed seat is provided with a gas chamber, the fixed seat is provided with a first air nozzle and a second air nozzle, wherein the first air nozzle is provided with a first air hole communicating with the gas chamber, and the second air nozzle is provided with a second air hole communicating with the gas chamber. The plastic base has a hollow cavity. A fixed iron core is inserted into one end of the plastic base. The fixed iron core has an air inlet that communicates with the cavity. The other end has a movable iron core and an elastic element. The elastic element is located between the movable iron core and the fixed iron core. The two ends of the movable iron core are respectively provided with a first stop plate and a second stop plate. The movable iron core is configured to reciprocate along the axial direction within the cavity. The movable iron core is provided with a first fitting groove and a second fitting groove. The first stop plate is fitted inside the first fitting groove, and the second stop plate is fitted inside the second fitting groove.
[0005] Furthermore, the area of the top end face of the first stop piece is smaller than the area of its bottom end face, and the cross-sectional area of the inner end of the first fitting groove is larger than the cross-sectional area of the outer end, wherein the first stop piece is embedded inside the first fitting groove.
[0006] Furthermore, the area of the top end face of the second stop is smaller than the area of its bottom end face, and the cross-sectional area of the inner end of the second fitting groove is larger than the cross-sectional area of the outer end, wherein the second stop is embedded inside the second fitting groove.
[0007] Furthermore, it also includes a housing, with the plastic base assembled inside the housing, the fixing base assembled on the top of the housing, the bottom end face of the fixing base tightly fitting the top end face of the housing, and the top end of the plastic base extending into the gas chamber, the gas chamber communicating with the cavity.
[0008] Furthermore, the mounting base has a mounting groove on the side facing the outer shell, and a second sealing ring is fitted inside the mounting groove, which fits tightly against the outer wall of the plastic base.
[0009] Furthermore, a first sealing ring is fitted on the outer side of the fixed iron core, and the first sealing ring is tightly fitted to the inner wall of the plastic seat.
[0010] Furthermore, the outer wall of the first air nozzle is formed with at least one barbed protrusion, which is shaped like a frustum.
[0011] Compared with the prior art, the beneficial effects of this utility model are: The movable iron core is provided with a first fitting groove and a second fitting groove. The first stop plate is installed inside the first fitting groove, and the second stop plate is installed inside the second fitting groove. This greatly enhances the connection strength between the first stop plate, the second stop plate and the movable iron core, effectively preventing loosening or falling off due to vibration, impact and other factors, and ensuring the high stability of the connection. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of a solenoid valve. Figure 2 This is an exploded view of the structure of a solenoid valve; Figure 3 This is a cross-sectional view of a solenoid valve; Figure 4 This is a cross-sectional view of the movable iron core.
[0013] Numbering on the map: 1. Outer shell; 2. First air nozzle; 3. First air hole; 4. Barbed protrusion; 5. Second air nozzle; 6. Second air hole; 7. Fixing base; 8. Coil; 9. Fixing iron core; 10. Second sealing ring; 11. Plastic base; 12. Flat surface; 13. First stop plate; 14. Elastic element; 15. Boss; 16. Air inlet; 17. Movable iron core; 18. First sealing ring; 19. Second stop plate; 20. Cavity; 21. Gas chamber; 22. First fitting groove; 23. Second fitting groove. Detailed Implementation
[0014] 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.
[0015] like Figure 1-4 As shown, this utility model provides a solenoid valve, including a housing 1, a plastic seat 11, a coil 8 and a fixing seat 7. The plastic seat 11 is assembled inside the housing 1, and the coil 8 is tightly and coaxially sleeved on the outer circumferential surface of the plastic seat 11. When energized, it generates electromagnetic force to control the operation of the solenoid valve. The mounting base 7 is assembled on the top of the outer shell 1, and the bottom surface of the mounting base 7 is in close contact with the top surface of the outer shell 1. The mounting base 7 has a gas chamber 21 and a mounting groove on the side facing the outer shell 1. The gas chamber 21 is used to store and distribute gas, and the gas chamber 21 is connected to the cavity 20. A first air nozzle 2 is provided on one side of the mounting base 7, and a second air nozzle 5 is provided on the other side. The outer wall of the first air nozzle 2 is formed with at least one barbed protrusion 4. The barbed protrusion 4 is truncated cone-shaped. When the first air nozzle 2 is engaged with the connecting parts of the external equipment, the clamping force is generated by its truncated cone shape, thereby improving the connection stability. The top of the plastic base 11 extends into the gas chamber 21. The second sealing ring 10 is installed inside the mounting groove. The second sealing ring 10 fits tightly against the outer wall of the plastic base 11 to form a reliable sealing structure and prevent gas leakage. The first air nozzle 2 is provided with a first air hole 3 that communicates with the gas chamber 21, and the second air nozzle 5 is provided with a second air hole 6 that communicates with the gas chamber 21. The plastic base 11 has a hollow cavity 20. A fixed iron core 9 is inserted into one end of the plastic base 11 along its length. The fixed iron core 9 passes through the outer shell 1 and is welded to the outer shell 1. The fixed iron core 9 has an air inlet 16 that communicates with the cavity 20 for gas to enter. A first sealing ring 18 is fitted on the outside of the fixed iron core 9. The first sealing ring 18 fits tightly against the inner wall of the plastic base 11 to form a reliable sealing structure and prevent gas from leaking from the gap between the fixed iron core 9 and the plastic base 11. At the other end of the plastic base 11 along its length, there is a movable iron core 17 and an elastic element 14. At the two ends of the movable iron core 17, there are a first stop plate 13 and a second stop plate 19 respectively. The movable iron core 17 is configured to reciprocate along the axial direction within the cavity 20. The elastic element 14 is located between the movable iron core 17 and the fixed iron core 9. The elastic element 14 is a spring. The elastic element 14 provides elastic force for the movement of the movable iron core 17, so that it can be reset after the electromagnetic force disappears. Preferably, the movable iron core 17 has two opposite side walls respectively provided with planes 12 so that the movable iron core 17 can form a sufficient gap with the inner wall of the plastic base 11 to facilitate airflow. The movable iron core 17 is provided with a first fitting groove 22 and a second fitting groove 23. The first stop plate 13 is assembled inside the first fitting groove 22, and the second stop plate 19 is assembled inside the second fitting groove 23. More preferably, the area of the top end face of the first stop plate 13 is smaller than the area of its bottom end face, and the cross-sectional area of the inner end of the first fitting groove 22 is larger than the cross-sectional area of the outer end. The first retaining plate is embedded inside the first fitting groove 22. The area of the top end face of the second stop plate 19 is smaller than the area of its bottom end face, and the cross-sectional area of the inner end of the second fitting groove 23 is larger than the cross-sectional area of the outer end. The second retaining plate is embedded inside the second fitting groove 23, which greatly enhances the connection strength between the first retaining plate, the second retaining plate and the movable iron core 17, effectively avoids loosening or falling off due to vibration, impact and other factors, and ensures the high stability of the connection. When the coil 8 of the solenoid valve is not energized, the movable iron core 17 in the cavity 20 slides upward under the elastic force of the elastic element 14, the air inlet 16 of the fixed iron core 9 opens, the first stop plate 13 at the upper end of the movable iron core 17 presses against the second air hole 6, and the gas enters the cavity 20 from the air inlet 16 of the fixed iron core 9 and then exits from the first air hole 3. When the coil 8 of the solenoid valve is energized, the coil 8 generates a magnetic field. The magnetic conductors of the movable iron core 17 and the fixed iron core 9 are magnetized by the magnetic field and attract each other with magnetic force. The movable iron core 17 slides downward along the axial direction of the plastic seat 11, opening the second air hole 6 and compressing the elastic element 14 until the second stop plate 19 at the lower end of the movable iron core 17 presses against the boss 15 on the top surface of the fixed iron core 9. At this time, the air inlet 16 is closed, and the gas enters the gas chamber 21 from the first air hole 3 and is discharged through the second air hole 6. When the solenoid valve is de-energized, the magnetic field disappears, and the movable iron core 17 is reset under the action of the elastic element 14, returning to its original position.
[0016] Compared to traditional technologies: 1. The movable iron core 17 is provided with a first fitting groove 22 and a second fitting groove 23. The first stop plate 13 is assembled inside the first fitting groove 22, and the second stop plate 19 is assembled inside the second fitting groove 23. This greatly enhances the connection strength between the first stop plate, the second stop plate and the movable iron core 17, effectively preventing loosening or falling off due to vibration, impact and other factors, and ensuring the high stability of the connection. 2. The outer wall of the first air nozzle 2 is formed with at least one barbed protrusion 4. The barbed protrusion 4 is in the shape of a frustum. When the first air nozzle 2 is engaged with the connecting parts of the external equipment, the frustum shape generates a clamping force, thereby improving the connection stability.
[0017] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A solenoid valve, comprising a plastic base, a coil, and a fixing seat, wherein the coil is sleeved on the outside of the plastic base, the fixing seat has a gas chamber, and the fixing seat has a first gas nozzle and a second gas nozzle, wherein... The first air nozzle is provided with a first air hole communicating with the gas chamber, and the second air nozzle is provided with a second air hole communicating with the gas chamber; The plastic base has a hollow cavity. A fixed iron core is inserted into one end of the plastic base. The fixed iron core has an air inlet that communicates with the cavity. The other end has a movable iron core and an elastic element. The elastic element is located between the movable iron core and the fixed iron core. The two ends of the movable iron core are respectively provided with a first stop plate and a second stop plate. The movable iron core is configured to reciprocate along the axial direction within the cavity. The movable iron core is characterized by having a first fitting groove and a second fitting groove. The first stop plate is fitted inside the first fitting groove, and the second stop plate is fitted inside the second fitting groove.
2. The solenoid valve according to claim 1, characterized in that, The area of the top end face of the first stop piece is smaller than the area of its bottom end face, and the cross-sectional area of the inner end of the first fitting groove is larger than the cross-sectional area of the outer end, wherein the first stop piece is embedded inside the first fitting groove.
3. The solenoid valve according to claim 1, characterized in that, The area of the top end face of the second stop piece is smaller than the area of its bottom end face, and the cross-sectional area of the inner end of the second fitting groove is larger than the cross-sectional area of the outer end, wherein the second stop piece is embedded inside the second fitting groove.
4. A solenoid valve according to claim 1, characterized in that, It also includes a housing, the plastic base is assembled inside the housing, the fixing base is assembled on the top of the housing, the bottom end face of the fixing base is tightly fitted with the top end face of the housing, and the top end of the plastic base extends into the gas chamber, the gas chamber is connected to the cavity.
5. A solenoid valve according to claim 4, characterized in that, The mounting base has a mounting groove on the side facing the outer shell, and a second sealing ring is fitted inside the mounting groove. The second sealing ring fits tightly against the outer wall of the plastic base.
6. A solenoid valve according to claim 1, characterized in that, A first sealing ring is fitted on the outer side of the fixed iron core, and the first sealing ring is tightly fitted to the inner wall of the plastic seat.
7. A solenoid valve according to claim 1, characterized in that, The outer wall of the first air nozzle is formed with at least one barbed protrusion, which is shaped like a frustum.