Dual-core solenoid valve with switchable air path

Abstract

A dual-core solenoid valve with switchable air paths includes a valve housing with a mounting cavity. A solenoid valve assembly and a first valve group and a second valve group are disposed at opposite ends of the solenoid valve assembly. The solenoid valve assembly has a small moving core and a large moving core corresponding to the first and second valve groups. The small moving core is located at the end of the solenoid valve assembly closest to the first valve group, and the solenoid valve assembly controls the small moving core to provide sealing control for the first valve group. The large moving core is located at the end of the solenoid valve assembly closest to the second valve group, and the solenoid valve assembly controls the large moving core to provide sealing control for the second valve group. This design uses one solenoid valve to control two moving cores, enabling switching between multiple air path channels. Different currents input to the solenoid valve flexibly switch between channels, effectively solving the problem of switching between three air path states, thereby reducing the number of solenoid valves used and decreasing the overall assembly size.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve technology, and specifically to a dual-core solenoid valve with switchable air paths. Background Technology

[0002] An electromagnetic valve is an electromagnetically controlled industrial device, a fundamental component of automation used to control fluids. It belongs to the actuator category and is not limited to hydraulic or pneumatic systems. It is used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. Electromagnetic valves can be used with different circuits to achieve the desired control, ensuring both precision and flexibility.

[0003] Currently, conventional solenoid valves on the market use one solenoid valve to control one iron core, achieving the switching of two air paths, similar to a switch structure. They achieve air path on / off switching through a switching mechanism, but can only switch between two states and cannot handle multiple states. When multiple air paths need to be switched, the number of solenoid valves is increased to increase the number of switching channels, resulting in an increase in size. Summary of the Invention

[0004] In view of this, the present invention provides a dual-core solenoid valve with switchable air path.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A switchable pneumatic path dual-core solenoid valve includes a valve housing with a mounting cavity formed therein. A solenoid valve assembly and a first valve group and a second valve group are disposed at opposite ends of the solenoid valve assembly. The solenoid valve assembly has a small moving core and a large moving core corresponding to the first and second valve groups. The small moving core is located at the end of the solenoid valve assembly closer to the first valve group, and the solenoid valve assembly controls the small moving core to provide sealing control for the first valve group. The large moving core is located at the end of the solenoid valve assembly closer to the second valve group, and the solenoid valve assembly controls the large moving core to provide sealing control for the second valve group.

[0007] Preferably, the first valve group has a first circuit and a second circuit, the second valve group has a third circuit and a fourth circuit, the solenoid valve assembly has a solenoid valve passage, and the solenoid valve passage, the first circuit, the second circuit, the third circuit and the fourth circuit are all connected to the mounting cavity. The end of the first circuit near the small moving iron core forms a first sealing port, and the end of the fourth circuit near the large moving iron core is provided with a second sealing port. When the solenoid valve assembly is not energized, the first sealing port is closed and the second sealing port is open.

[0008] Preferably, the solenoid valve assembly includes a solenoid valve body and a stationary iron core. The solenoid valve body has a central groove, and the stationary iron core is disposed in the central groove. The two ends of the stationary iron core have corresponding small moving iron core fixing grooves and large moving iron core fixing grooves. The small moving iron core and large moving iron core extend into the corresponding small moving iron core fixing grooves and large moving iron core fixing grooves and connect with the stationary iron core. The small moving iron core and large moving iron core move within the corresponding small moving iron core fixing grooves and large moving iron core fixing grooves according to the magnitude of the current input into the solenoid valve body.

[0009] Preferably, the small moving iron core, the stationary iron core, and the large moving iron core are provided with corresponding small moving iron core passages, stationary iron core passages, and large moving iron core passages. The small moving iron core passages and the stationary iron core passages are connected. The large moving iron core passages are inclined. The end of the stationary iron core passages near the large moving iron core forms a third sealing port. When a certain current is applied to the solenoid valve assembly, the second sealing port closes and the third sealing port opens.

[0010] Preferably, there is a gap between the stationary iron core and the large moving iron core, and the end of the stationary iron core passage near the large moving iron core is connected to the gap, and the end of the large moving iron core passage near the stationary iron core is connected to the gap.

[0011] Preferably, both the end of the small moving iron core near the first valve group and the end of the large moving iron core near the second valve group are provided with elastic recovery elements.

[0012] Preferably, the elastic restoring member includes a first spring and a second spring. The first spring is sleeved on the top end of the small moving iron core, and the top end of the small moving iron core has a first spring fixing part. One end of the first spring abuts against the first spring fixing part, and the other end abuts against the top end of the groove wall of the small moving iron core fixing groove. The second spring is sleeved on the bottom end of the large moving iron core, and the large moving iron core has a second spring fixing part. One end of the second spring abuts against the second spring fixing part, and the other end abuts against the bottom end of the groove wall of the large moving iron core fixing groove.

[0013] Preferably, sealing gaskets are provided on both the end of the small moving iron core near the first sealing port and the end of the large moving iron core near the second sealing port.

[0014] The beneficial effects of this invention are as follows: This design uses a solenoid valve to control two moving iron cores, realizing the switching of multiple air passages. By inputting different currents to the solenoid valve, the various channels can be flexibly switched, effectively solving the problem of switching between three air passage states, thereby saving the number of solenoid valves used and reducing the overall volume; The solenoid valve assembly of this invention has high processing precision and high guiding performance, and can simultaneously separate the two moving iron cores to achieve independent control, thus avoiding motion interference between the small and large moving iron cores. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Appendix Figure 1 This is a schematic diagram of the non-energized structure of the present invention;

[0017] Appendix Figure 2 This is a schematic diagram of the structure of the present invention under a certain current condition;

[0018] Appendix Figure 3 This is a schematic diagram of the structure of the present invention under the condition of maximum current being applied;

[0019] Appendix Figure 4 For the appendix Figure 1 Enlarged view of point A in the image;

[0020] Appendix Figure 5 For the appendix Figure 1 Enlarged view of point B in the image;

[0021] Appendix Figure 6 For the appendix Figure 1 Enlarged view of point C in the image.

[0022] Figure label:

[0023] 1. Valve housing; 2. Mounting cavity; 3. Solenoid valve assembly; 4. First valve group; 5. Second valve group; 6. Small moving iron core; 7. Large moving iron core; 8. First circuit; 9. Second circuit; 10. Third circuit; 11. Fourth circuit; 12. First sealing port; 13. Second sealing port; 14. Third sealing port; 15. Solenoid valve body; 16. Stationary iron core; 17. Center groove; 18. Small moving iron core fixing groove; 19. Large moving iron core fixing groove; 20. First valve group mounting part; 21. Solenoid valve mounting part; 22. Second valve group mounting part; 23. Small moving iron core passage; 24. Stationary iron core passage; 25. Large moving iron core passage; 26. Clearance; 27. Elastic recovery element; 28. First spring; 29. ​​Second spring; 30. First spring fixing part; 31. Second spring fixing part; 32. Sealing gasket. Detailed Implementation

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

[0025] The present invention will now be further described with reference to the accompanying drawings.

[0026] This invention provides the following technical solution:

[0027] As attached Figures 1-6 As shown, this invention discloses a dual-core solenoid valve with switchable air paths, including a valve housing 1. A mounting cavity 2 is formed within the valve housing 1. A solenoid valve assembly 3 and a first valve group 4 and a second valve group 5 are disposed at opposite ends of the solenoid valve assembly 3. The solenoid valve assembly 3 has a small moving core 6 and a large moving core 7 corresponding to the first valve group 4 and the second valve group 5. The small moving core 6 is located at the end of the solenoid valve assembly 3 closest to the first valve group 4, and the solenoid valve assembly 3 controls the small moving core 6 to provide sealing control for the first valve group 4. The large moving core 7 is located at the end of the solenoid valve assembly 3 closest to the second valve group 5, and the solenoid valve assembly 3 controls the large moving core 7 to provide sealing control for the second valve group 5. Specifically, this design uses one solenoid valve to control two moving cores, enabling switching between multiple air path channels. Different currents are input to the solenoid valve to flexibly switch between channels, effectively solving the problem of switching between three air path states, thereby saving the number of solenoid valves used and reducing the overall assembly size.

[0028] When the solenoid valve body 15 is not energized, the small moving iron core 6 and the large moving iron core 7 will not move within the corresponding small moving iron core fixing slots 18 and large moving iron core fixing slots 19 at both ends of the stationary iron core 16. At this time, the suction force of the solenoid valve assembly 3 is less than the initial preload of the first spring 28 and the second spring 29. The second sealing port 13 is open, the first sealing port 12 is closed, and the third sealing port 14 is closed, so that the third circuit 10 is connected to the second circuit 9, the first circuit 8 is closed, and the fourth circuit 11 is closed. When a certain current is applied to the solenoid valve body 15, the large moving iron core 7 and the small moving iron core 6 obtain the suction force generated by the solenoid valve body 15 under the specific current. This suction force is greater than the initial preload of the second spring 29 and less than the initial preload of the first spring 28. In this state, The large moving iron core 7 is displaced within the large moving iron core fixing groove 19, causing the second sealing port 13 to close and the third sealing port 14 to open, thereby connecting the third circuit 10 and the fourth circuit 11, closing the first circuit 8 and the second circuit 9. When the maximum set current is applied to the solenoid valve body 15, the large moving iron core 7 and the small moving iron core 6 obtain the maximum attraction force generated by the solenoid valve body 15 under that current. At this time, the attraction force of the solenoid valve body 15 is greater than the initial preload force of the second spring 29 and the initial preload force of the first spring 28. The large moving iron core 7 and the small moving iron core 6 are displaced within the corresponding large moving iron core fixing groove 19 and small moving iron core fixing groove 18, causing the third circuit 10 and the fourth circuit 11 to connect, and the first circuit 8 and the second circuit 9 to connect.

[0029] Furthermore, the first valve group 4 has a first circuit 8 and a second circuit 9, the second valve group 5 has a third circuit 10 and a fourth circuit 11, the solenoid valve assembly 3 has a solenoid valve passage, and the solenoid valve passage, the first circuit 8, the second circuit 9, the third circuit 10 and the fourth circuit 11 are all connected to the mounting cavity 2. The end of the first circuit 8 near the small moving iron core 6 forms a first sealing port 12, and the end of the fourth circuit 11 near the large moving iron core 7 is provided with a second sealing port 13.

[0030] Furthermore, the solenoid valve assembly 3 includes a solenoid valve body 15 and a stationary iron core 16. A central groove 17 is provided on the solenoid valve body 15, and the stationary iron core 16 is disposed in the central groove 17. The two ends of the stationary iron core 16 are provided with small moving iron core fixing grooves 18 and large moving iron core fixing grooves 19 corresponding to small moving iron core 6 and large moving iron core 7. The small moving iron core 6 and large moving iron core 7 extend into the corresponding small moving iron core fixing grooves 18 and large moving iron core fixing grooves 19 and are connected to the stationary iron core 16. The small moving iron core 6 and large moving iron core 7 move in the corresponding small moving iron core fixing grooves 18 and large moving iron core fixing grooves 19 according to the magnitude of the current input into the solenoid valve body 15. Specifically, by setting small moving iron core fixing grooves 18 and large moving iron core fixing grooves 19 at both ends of the stationary iron core 16, the horizontal positions of the small moving iron core 6 and the large moving iron core 7 are limited, and they can only move up and down within the corresponding grooves. Compared with some existing technologies that do not have a stationary iron core 16, the stationary iron core 16 structure in this design has high processing precision and guiding performance. It can separate the two moving iron cores at the same time, realize independent control, and avoid motion interference between the small moving iron core 6 and the large moving iron core 7.

[0031] In this design, the mounting cavity 2 has a first valve group mounting part 20, a solenoid valve mounting part 21, and a second valve group mounting part 22. The first valve group 4, the solenoid valve assembly 3, and the second valve group 5 are all installed in corresponding positions. In order to improve the guiding performance of the stationary iron core 16, the groove walls of the small moving iron core fixing groove 18 and the large moving iron core fixing groove 19 at both ends of the stationary iron core 16 extend to the first valve group mounting part 20 and the second valve group mounting part 22. This ensures that when the small moving iron core 6 and the large moving iron core 7 move into the first valve group mounting part 20 and the second valve group mounting part 22 during movement, the guiding performance of the stationary iron core 16 is always guaranteed, preventing deviations in the moving position.

[0032] Furthermore, the small moving iron core 6, the stationary iron core 16, and the large moving iron core 7 are provided with corresponding small moving iron core passages 23, stationary iron core passages 24, and large moving iron core passages 25. The small moving iron core passage 23 and the stationary iron core passage 24 are connected. The large moving iron core passage 25 is inclined, and the end of the stationary iron core passage 24 near the large moving iron core 7 forms a third sealing port 14. Specifically, the inclined arrangement of the large moving iron core passage 25 is to avoid the stationary iron core passage 24, so that when the large moving iron core 7 is engaged, a seal can be achieved between the stationary iron core 16 and the large moving iron core 7, that is, a seal at the third sealing port 14.

[0033] Furthermore, a gap 26 exists between the stationary iron core 16 and the large moving iron core 7. The end of the stationary iron core passage 24 near the large moving iron core 7 communicates with this gap 26, and the end of the large moving iron core passage 25 near the stationary iron core 16 communicates with this gap 26. Specifically, the gap 26 between the large moving iron core 7 and the stationary iron core 16 is generated by the natural drooping of the large moving iron core 7 when it is placed vertically in the large moving iron core fixing groove 19. This gap 26 can better ensure the movement of the large moving iron core 7 within the large moving iron core fixing groove 19, avoiding insufficient movement distance that would prevent smooth switching of the air path.

[0034] Furthermore, both the end of the small moving iron core 6 near the first valve group 4 and the end of the large moving iron core 7 near the second valve group 5 are provided with elastic recovery members 27. Furthermore, the elastic recovery members include a first spring 28 and a second spring 29. The first spring 28 is sleeved on the top end of the small moving iron core 6, and the top end of the small moving iron core 6 has a first spring fixing part 30. One end of the first spring 28 abuts against the first spring fixing part 30, and the other end abuts against the top end of the groove wall of the small moving iron core fixing groove 18. The second spring 29 is sleeved on the bottom end of the large moving iron core 7, and the large moving iron core 7 has a second spring fixing part 31. One end of the second spring 29 abuts against the second spring fixing part 31, and the other end abuts against the bottom end of the groove wall of the large moving iron core fixing groove 19. Specifically, by providing elastic recovery elements 27 at the end of the small moving iron core 6 near the first valve group 4 and at the end of the large moving iron core 7 near the second valve group 5, after the input of current is disconnected from the solenoid valve body 15, the small moving iron core 6 and the large moving iron core 7 can return to their initial positions under the rebound action of the corresponding elastic recovery elements 27, and then perform another air circuit switching operation.

[0035] Furthermore, sealing gaskets 32 are provided on both the end of the small moving iron core 6 near the first sealing port 12 and the end of the large moving iron core 7 near the second sealing port 13. Specifically, by providing sealing gaskets 32, the sealing ports that need to be closed can be effectively sealed when switching the air circuit with power on, preventing the phenomenon of incomplete sealing.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-core solenoid valve with switchable air path, comprising a valve housing, wherein a mounting cavity is formed within the valve housing, and a solenoid valve assembly and a first valve group and a second valve group are disposed at both ends of the solenoid valve assembly, characterized in that: The solenoid valve assembly is equipped with a small moving iron core and a large moving iron core corresponding to the first valve group and the second valve group. The small moving iron core is located at the end of the solenoid valve assembly near the first valve group, and the solenoid valve assembly controls the small moving iron core to perform sealing control on the first valve group. The large moving iron core is located at the end of the solenoid valve assembly near the second valve group, and the solenoid valve assembly controls the large moving iron core to perform sealing control on the second valve group. The small moving iron core, the stationary iron core, and the large moving iron core are provided with corresponding small moving iron core passages, stationary iron core passages, and large moving iron core passages. The small moving iron core passage and the stationary iron core passage are connected. The large moving iron core passage is inclined. The end of the stationary iron core passage near the large moving iron core forms a third sealing port. When a certain current is applied to the solenoid valve assembly, the second sealing port closes and the third sealing port opens. Both the end of the small moving iron core near the first valve group and the end of the large moving iron core near the second valve group are provided with elastic recovery elements.

2. The dual-core solenoid valve with switchable air path according to claim 1, characterized in that: The first valve group has a first circuit and a second circuit, the second valve group has a third circuit and a fourth circuit, and the solenoid valve assembly has a solenoid valve passage. The solenoid valve passage, the first circuit, the second circuit, the third circuit and the fourth circuit are all connected to the mounting cavity. The end of the first circuit near the small moving iron core forms a first sealing port, and the end of the fourth circuit near the large moving iron core is provided with a second sealing port. When the solenoid valve assembly is not energized, the first sealing port is closed and the second sealing port is open.

3. The dual-core solenoid valve with switchable air path according to claim 2, characterized in that: The solenoid valve assembly includes a solenoid valve body and a stationary iron core. A central groove is provided on the solenoid valve body, and the stationary iron core is disposed in the central groove. The two ends of the stationary iron core are provided with small moving iron core fixing grooves and large moving iron core fixing grooves corresponding to the small moving iron core and the large moving iron core, respectively. The small moving iron core and the large moving iron core extend into the corresponding small moving iron core fixing grooves and the large moving iron core fixing grooves and connect with the stationary iron core. The small moving iron core and the large moving iron core move within the corresponding small moving iron core fixing grooves and the large moving iron core fixing grooves according to the magnitude of the current input into the solenoid valve body.

4. The dual-core solenoid valve with switchable air path according to claim 1, characterized in that: There is a gap between the stationary iron core and the large moving iron core. The end of the stationary iron core passage near the large moving iron core is connected to the gap, and the end of the large moving iron core passage near the stationary iron core is connected to the gap.

5. The dual-core solenoid valve with switchable air path according to claim 1, characterized in that: The elastic restoring component includes a first spring and a second spring. The first spring is sleeved on the top end of the small moving iron core, and the top end of the small moving iron core has a first spring fixing part. One end of the first spring abuts against the first spring fixing part, and the other end abuts against the top end of the groove wall of the small moving iron core fixing groove. The second spring is sleeved on the bottom end of the large moving iron core, and the large moving iron core has a second spring fixing part. One end of the second spring abuts against the second spring fixing part, and the other end abuts against the bottom end of the groove wall of the large moving iron core fixing groove.

6. The dual-core solenoid valve with switchable air path according to claim 2, characterized in that: Sealing gaskets are provided on the end of the small moving iron core near the first sealing port and the end of the large moving iron core near the second sealing port.

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