A digital valve with adjustable dynamic and static characteristics and quick opening and closing

Abstract

The present invention discloses a bidirectional, rapid-opening and closing digital valve with adjustable dynamic and static characteristics. The valve comprises a valve bonnet, a valve sleeve fixedly connected to one side of the valve bonnet, a valve seat fixedly connected to the other side of the valve sleeve, a first coil frame fixedly connected to the valve sleeve, a first coil slidingly mounted on the first coil frame, a valve core slidingly mounted at the center of the first coil frame, a second coil frame fixedly mounted to the valve seat, a second coil wound around the second coil frame, a base with a clearance fit disposed within the inner bore of the second coil frame, and a second return spring disposed between the base and the valve seat. This digital valve utilizes dual electromagnetic coils, enabling rapid valve core actuation, shortening the time it takes to open and close the digital valve and providing faster response. The spring is controlled by screwing a bidirectional adjustment bolt, thereby adjusting the coil to a neutral position, a leftward shift, or a rightward shift, thereby varying the density of the magnetic path and thereby adjusting the dynamic and static characteristics of the digital valve.

Description

Technical Field

[0001] The present invention belongs to the field of digital valves, and in particular relates to a bidirectional fast-opening and closing digital valve with adjustable dynamic and static characteristics. Background Art

[0002] Digital valves are widely used in various industrial sectors, including machine tools, construction machinery, and materials testing machines, offering broad application prospects and promising economic and social benefits. Using PWM control, they organically integrate computer technology with fluid control techniques, enabling direct digital control of hydraulic systems. Compared to proportional valves and servo valves, digital valves offer advantages such as a simpler structure. As a critical component in hydraulic systems, their dynamic and static characteristics and response speed directly impact the system's performance. However, existing digital valve technologies suffer from issues such as slow response speed and a significant dependence of control characteristics on oil supply pressure. Summary of the Invention

[0003] The object of the present invention is to provide a bidirectional fast opening and closing digital valve with adjustable dynamic and static characteristics to solve the above problems.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A digital valve with bidirectional quick opening and closing and adjustable dynamic and static characteristics comprises a valve bonnet, a fixedly connected valve sleeve is provided on one side of the valve bonnet, a fixedly connected valve seat is provided on one side of the valve sleeve, a fixedly connected first coil skeleton is provided in the valve sleeve, a slidingly fitted first coil is provided on the first coil skeleton, a slidingly fitted valve core is provided at the center of the first coil skeleton, a fixedly connected second coil skeleton is provided in the valve seat, a second coil is wound on the second coil skeleton, a clearance-fitted base is provided in the inner hole of the second coil skeleton, a second return spring is provided between the base and the valve seat, a valve core cone is provided at one end of the valve core, the valve core cone matches the channel in the base to form a seal, and an oil outlet channel and an oil inlet channel are provided in the valve seat.

[0006] Preferably, a threaded hole is provided on the valve bonnet, a first adjusting bolt and a second adjusting bolt are provided in the threaded hole, light holes are opened on both sides of the first coil skeleton, a first adjusting spring is provided in the light hole on one side of the first coil skeleton, and a fourth adjusting spring is provided in the light hole on the other side, the first adjusting spring is located between the first adjusting bolt and the first coil, a fifth adjusting bolt with a threaded connection is provided on the valve seat, and the fourth adjusting spring is located between the fifth adjusting bolt and the first coil.

[0007] Preferably, the valve core includes a valve core rod and a valve core cone, the valve core rod and the valve core cone are interference fit, a first reset spring is provided between one end of the valve core rod and the second adjusting bolt, the outer cylindrical surface of the valve core rod and the inner cylindrical surface of the valve sleeve form an annular hole, a magnetic ring is provided in the annular hole, and the right end face of the magnetic ring and the right end face of the valve sleeve are on the same plane.

[0008] Preferably, the valve seat is sleeved on the valve core rod, the valve seat and the valve sleeve are fixedly connected by welding, and a lead wire channel is opened on the valve seat.

[0009] Preferably, one end of the second return spring is fixedly connected to the base, and the other end of the second return spring is fixedly connected to the valve seat.

[0010] Preferably, a first sealing ring is installed between the end face of the first coil skeleton and the end face of the valve bonnet step, and a second sealing ring is installed between the end face of the first coil skeleton and the end face of the magnetic ring; a third sealing ring is installed between the end face of the valve seat and the end face of the magnetic ring, a fourth sealing ring is installed on the outer cylindrical surface of the valve seat, and a seventh sealing ring is installed on the end of the valve seat; a fifth sealing ring is installed between the table surface of the second coil skeleton and the inner hole of the valve seat, a sixth sealing ring is installed between the table surface of the second coil skeleton and the inner hole of the valve seat, and an eighth sealing ring is installed between the outer cylindrical surface of the base and the cylindrical surface of the inner hole of the second coil skeleton.

[0011] Beneficial effects of the present invention:

[0012] The present invention proposes a two-way rapid opening and closing digital valve with adjustable dynamic and static characteristics. The valve adopts a dual electromagnetic coil, which can make the valve core move quickly, shorten the time spent on opening and closing of the digital valve, and have a faster response. By screwing the two-way adjustment bolt to control the adjustment spring, the coil is placed in the middle position, left shifted, and right shifted positions respectively, changing the density of the magnetic path, thereby adjusting the dynamic and static characteristics of the digital valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the digital valve of the present invention;

[0015] Figure 2 It is a cross-sectional schematic diagram of the overall structure of the digital valve of the present invention;

[0016] Figure 3 This is a schematic diagram of magnetic flux lines when the digital valve of the present invention is in position ① after the coil is in the middle position;

[0017] Figure 4 This is a schematic diagram of magnetic flux lines when the digital valve of the present invention is in position ② after the coil is moved to the left;

[0018] Figure 5 This is a schematic diagram of magnetic flux lines when the digital valve of the present invention is in position ③ after the coil is moved to the left;

[0019] Figure 6 is a graph showing the relationship between the electromagnetic force and the air gap length of the digital valve of the present invention;

[0020] Figure 7 This is a comparison diagram of the valve core opening response curve of the digital valve of the present invention;

[0021] Figure 8 1. The relationship curves between duty cycle and flow rate of the digital valve of the present invention at 50 Hz frequency when the coils are in positions ①, ②, and ③ respectively;

[0022] Figure 9 This is a graph showing different inlet pressures of the digital valve of the present invention;

[0023] Notes on the accompanying figures: 1. First adjusting bolt; 2. Second adjusting bolt; 3. Third adjusting bolt; 4. Valve bonnet; 5. First sealing ring; 6. First coil skeleton; 7. Second adjusting spring; 8. Valve sleeve; 9. First coil; 10. First return spring; 11. Valve core rod; 12. Third adjusting spring; 13. Second sealing ring; 14. Fourth adjusting bolt; 15. Magnetic ring; 16. Third sealing ring; 17. Lead wire channel; 18. Fourth sealing ring; 19. Valve core cone; 20. Fifth sealing ring; 21. Second coil; 22. Sixth sealing ring; 23. Valve seat; 24. Seventh sealing ring; 25. Second coil skeleton; 26. Second return spring; 27. Oil inlet channel; 28. Base; 29. Eighth sealing ring; 30. Oil outlet channel; 31. Fifth adjusting bolt; 32. Fourth adjusting spring; 33. First adjusting spring. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] See Figures 1 to 9, a two-way fast opening and closing digital valve with adjustable dynamic and static characteristics, including a valve bonnet 4, a valve sleeve 8 is provided on one side of the valve bonnet 4, a valve seat 23 is provided on one side of the valve sleeve 8, a first fixed coil skeleton 6 is provided in the valve sleeve 8, a first coil 9 is provided on the first coil skeleton 6 for sliding fit, a valve core with a clearance fit is provided at the center of 6, a second fixed coil skeleton 25 is provided in the valve seat 23, a second coil 21 is wound on the second coil skeleton 25, a base 28 with a clearance fit is provided in the inner hole of the second coil skeleton 25, a second return spring 26 is provided between the base 28 and the valve seat 23, a valve core cone 19 is provided at one end of the valve core, the valve core cone 19 matches the channel in the base 28 to form a seal, and an oil outlet channel 30 and an oil inlet channel 27 are provided in the valve seat 23.

[0027] Furthermore, the left end face of the valve bonnet 4 is provided with three countersunk threaded holes, one end of which is an external hexagonal structure and the other end is a cylindrical structure, and the first adjusting bolt 1, the second adjusting bolt 2 and the third adjusting bolt 3 are all installed in the countersunk threaded holes; the first coil 9 is wound on the first coil skeleton 6, and light holes are opened on both sides of the first coil skeleton 6. A first adjustment spring 33 is provided in the light hole on one side of the first coil skeleton 6, and a fourth adjustment spring 32 is provided in the light hole on the other side. The first adjustment spring 33 is located between the first adjusting bolt 1 and the first coil 9, and a fifth adjusting bolt 31 and a fourth adjusting bolt 14 are threadedly connected on the valve seat 23, and the fourth adjustment spring 32 is located between the fifth adjusting bolt 31 and the first coil 9.

[0028] Furthermore, the valve core includes a valve core rod 11 and a valve core cone 19. The valve core rod 11 and the valve core cone 19 are interference fit. A first reset spring 10 is provided between one end of the valve core rod 11 and the second adjusting bolt 2. The outer cylindrical surface of the valve core rod 11 and the inner cylindrical surface of the valve sleeve 8 form a circular ring hole. A magnetic ring 15 is provided in the hole. The right end face of the magnetic ring 15 is on the same plane as the right end face of the valve sleeve 8.

[0029] Furthermore, the valve seat 23 is sleeved on the valve core rod 11 , and the left end surface of the valve seat 23 is fixedly connected to the right end surface of the valve sleeve 8 by welding. A lead channel 17 is opened on the valve seat 23 .

[0030] Furthermore, the left end of the second return spring 26 is fixedly connected to the right end surface of the base 28, and the right end of the second return spring 26 is fixedly connected to the valve seat 23.

[0031] Furthermore, a first sealing ring 5 is installed between the left end face of the first coil skeleton 6 and the step end face of the valve cap 4, and a second sealing ring 13 is installed between the right end face of the first coil skeleton 6 and the left end face of the magnetic ring 15; a third sealing ring 16 is installed between the left end face of the valve seat 23 and the right end face of the magnetic ring 15, a fourth sealing ring 18 is installed on the outer cylindrical surface of the valve seat 23, and a seventh sealing ring 24 is installed on the right end of the valve seat 23; a fifth sealing ring 20 is installed between the left end table of the second coil skeleton 25 and the inner hole of the valve seat 23, a sixth sealing ring 22 is installed between the right end table of the second coil skeleton 25 and the inner hole of the valve seat 23, and an eighth sealing ring 29 is installed between the outer cylindrical surface of the base 28 and the cylindrical surface of the inner hole of the second coil skeleton 25.

[0032] More specifically, the right outer cylindrical surface of the valve seat 23 has a threaded structure, which facilitates the installation of the valve on other components. The left end of the valve cap 4 is an outer hexagonal structure, which is convenient for installation and disassembly.

[0033] More specifically, the cylindrical structure at the right end of the valve cap 4 is gap-fitted with the inner hole of the first coil skeleton 6, the outer cylindrical surface of the valve core rod 11 is gap-fitted with the inner hole of the first coil skeleton 6, the outer cylindrical surface of the valve core rod 11 is gap-fitted with the inner hole of the magnetic ring 15, the outer cylindrical surface of the valve core rod 11 is gap-fitted with the inner hole at the left end of the valve seat 23, and the inner hole on the right side of the valve core rod 11 and the left side boss of the valve core cone 19 are interference fit to form the valve core. These fits enable the valve core to move left and right after the first coil 9 is energized.

[0034] More specifically, the lead wire channel 17 is where the lead wire of the second coil 21 is placed. The left end leads to the outer cylindrical surface of the valve seat 23, and the right end is connected to the second coil 21. The lead wire is sealed with glue in the lead wire channel 17 to prevent moisture and provide insulation.

[0035] More specifically, the valve cap 4, the valve sleeve 8, the valve core rod 11 and the magnetic ring 15 are all made of soft magnetic materials to form a closed electromagnetic circuit.

[0036] More specifically, when the first coil 9 is energized, the valve core, consisting of the valve core rod 11 and the valve core cone 19, is attracted by the valve cap 4, causing the valve core to move axially from right to left, compressing the first return spring 10. Simultaneously, when the second coil 21 is energized, the seat 28 moves axially from left to right, compressing the second return spring 26. At this time, the seal between the conical surface of the valve core cone 19 and the channel of the seat 28 is opened, allowing hydraulic oil to enter through the oil inlet channel 27 of the valve seat 23 and be discharged through the oil outlet channel 30 of the valve seat 23, resulting in rapid opening of the valve core and a faster response time.

[0037] When the first coil 9 loses power, due to the loss of electromagnetic force, the valve core composed of the valve core rod 11 and the valve core cone 19 moves axially from left to right under the action of the restoring deformation elastic force of the first return spring 10. At the same time, the second coil 21 also loses power, and the base 28 moves axially from right to left under the action of the restoring deformation elastic force of the second return spring 26, so that the right end conical surface of the valve core cone 19 contacts and seals with the left end channel of the base 28. At this time, the oil inlet channel 27 and the oil outlet channel 30 of the valve seat 23 are blocked, and hydraulic oil cannot flow, so that the valve core closes quickly and the response time is faster.

[0038] More specifically, the distance between the right end surface of the valve cap 4 and the left end surface of the valve core rod 11 is adjusted by the second adjusting bolt 2, thereby adjusting the length of the air gap.

[0039] More specifically, the first adjustment spring 33, the second adjustment spring 7, the third adjustment spring 12 and the fourth adjustment spring 32 are acted on by the screwing length of the first adjustment bolt 1, the third adjustment bolt 3, the fourth adjustment bolt 14 and the fifth adjustment bolt 31, so that the first coil 9 moves, thereby adjusting the coil to be in the middle position ①, the left position ② and the right position ③ respectively.

[0040] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0042] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0043] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A digital valve, characterized in that: The invention comprises a valve bonnet (4), wherein one side of the valve bonnet (4) is provided with a fixedly connected valve sleeve (8), one side of the valve sleeve (8) is provided with a fixedly connected valve seat (23), a first coil skeleton (6) is provided in the valve sleeve (8), a first coil (9) with a sliding fit is provided on the first coil skeleton (6), a valve core with a sliding fit is provided at the center of the first coil skeleton (6), a second coil skeleton (25) is provided in the valve seat (23), a second coil (21) is wound on the second coil skeleton (25), a base (28) with a clearance fit is provided in the inner hole of the second coil skeleton (25), a second return spring (26) is provided between the base (28) and the valve seat (23), a valve core cone (19) is provided at one end of the valve core, the valve core cone (19) matches the channel in the base (28) to form a seal, and an oil outlet channel (30) and an oil inlet channel (27) are provided in the valve seat (23); The valve cap (4) is provided with a threaded hole, in which a first adjusting bolt (1), a second adjusting bolt (2) and a third adjusting bolt (3) are provided. Light holes are opened on both sides of the first coil skeleton (6). A first adjusting spring (33) and a second adjusting spring (7) are provided in the light hole on one side of the first coil skeleton (6), and a third adjusting spring (12) and a fourth adjusting spring (32) are provided in the light hole on the other side. The first adjusting spring (33) is located between the first adjusting bolt (1) and the first coil (9), and the second adjusting spring (7) is located between the third adjusting bolt (3) and the first coil (9). A fourth adjusting bolt (14) and a fifth adjusting bolt (31) are provided on the valve seat (23) in threaded connection. The fourth adjusting spring (32) is located between the fifth adjusting bolt (31) and the first coil (9), and the third adjusting spring (12) is located between the fourth adjusting bolt (14) and the first coil (9).

2. A digital valve according to claim 1, characterized in that: The valve core includes a valve core rod (11) and a valve core cone (19), the valve core rod (11) and the valve core cone (19) are interference fit, a first reset spring (10) is provided between one end of the valve core rod (11) and the second adjusting bolt (2), the outer cylindrical surface of the valve core rod (11) and the inner cylindrical surface of the valve sleeve (8) form an annular hole, a magnetic ring (15) is provided in the annular hole, and the right end surface of the magnetic ring (15) and the right end surface of the valve sleeve (8) are on the same plane.

3. A digital valve according to claim 1, characterized in that: The valve seat (23) is sleeved on the valve core rod (11), and the valve seat (23) and the valve sleeve (8) are fixedly connected by welding. A lead wire channel (17) is opened on the valve seat (23).

4. A digital valve according to claim 1, characterized in that: One end of the second return spring (26) is fixedly connected to the base (28), and the other end of the second return spring (26) is fixedly connected to the valve seat (23).

5. A digital valve according to any one of claims 1 to 4, characterized in that: A first sealing ring (5) is installed between the end face of the first coil skeleton (6) and the end face of the step of the valve cap (4), and a second sealing ring (13) is installed between the end face of the first coil skeleton (6) and the end face of the magnetic ring (15); a third sealing ring (16) is installed between the end face of the valve seat (23) and the end face of the magnetic ring (15), a fourth sealing ring (18) is installed on the outer cylindrical surface of the valve seat (23), and a seventh sealing ring (24) is installed at the end of the valve seat (23); a fifth sealing ring (20) is installed between the table surface of the second coil skeleton (25) and the inner hole of the valve seat (23), a sixth sealing ring (22) is installed between the table surface of the second coil skeleton (25) and the inner hole of the valve seat (23), and an eighth sealing ring (29) is installed between the outer cylindrical surface of the base (28) and the cylindrical surface of the inner hole of the second coil skeleton (25).

Images