Fast response electromagnetic valve with nested disc spring structure

Abstract

The fast response electromagnetic valve with the nested disc spring structure comprises an electromagnetic assembly, a valve seat, a valve element, a spring, a coil and a magnetism isolating gasket, the electromagnetic assembly comprises stop iron, a magnetism isolating ring, a fixing block, a shell and an inlet connecting nozzle, and the valve seat comprises a threaded connecting block and a supporting ring fixed to the top end of the connecting block; an outlet channel is formed in the middle of the threaded connecting block, the top face of the threaded connecting block is a valve seat interface, the area between the inner side of the supporting ring and the valve seat interface is an annular containing cavity, and the bottom end of the valve element is arranged in the annular containing cavity. The valve element is a split type valve element or an integrated valve element, a spring is installed between the valve element and the electromagnetic assembly, the magnetism isolating gasket is located between the valve element and the lower end face of the stop iron, and an air gap exists between the magnetism isolating gasket and the lower end face of the stop iron when the magnetism isolating gasket is in a free state. The disc spring with a larger force value can be used, and therefore the effect of the disc spring on improving the closing response characteristic of the electromagnetic valve is greatly achieved.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic valve technology, specifically relating to a fast-response electromagnetic valve with a nested disc spring structure. Background Technology

[0002] Solenoid valves are used in various hydraulic and pneumatic systems as control elements, performing functions such as system startup, shutdown, and flow regulation. In the field of test and measurement control, the high-speed operation of fast-response solenoid valves allows for wide-range pressure regulation of the medium using a Bang-Bang control method. In this application, high requirements are placed on the response speed of the solenoid valve.

[0003] In the fast-response technology of solenoid valves, in addition to using an accelerated release circuit, disc springs are often used as accelerated release devices. However, due to the small residual air gap of solenoid valves in micro systems, traditional solenoid valves often place the disc spring between the armature and the stop. This limits the thickness of the disc spring to the air gap, which greatly limits the mechanical performance design of the disc spring, making it difficult to increase the disc spring force, let alone optimize its disc spring force characteristics.

[0004] To address the issue that small, fast-response solenoid valves cannot accommodate disc springs to accelerate their closing response due to their small remaining air gap, a fast-response solenoid valve with a nested disc spring structure is proposed. This allows for a slight increase in the solenoid valve's structural weight and a minor adjustment in its size, thereby improving the closing response rate. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a fast-response solenoid valve with a nested disc spring structure to address the shortcomings of the prior art mentioned above.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a fast-response solenoid valve with a nested disc spring structure, comprising an electromagnetic assembly, a valve seat, a valve core, a spring, a coil, and a magnetic shielding gasket.

[0007] The electromagnetic component includes a stop, a magnetic shielding ring, a fixing block, a housing, and an inlet nozzle. The fixing block has a stepped hole interface. The top of the stop has an inlet nozzle. A magnetic shielding ring is placed between the stop and the fixing block. The bottom of the housing is fixed to the outside of the fixing block. The housing completes the connection between the stop, the magnetic shielding ring, and the fixing block. The coil is installed in the cavity formed by the stop, the magnetic shielding ring, the fixing block, and the housing. A valve core is installed in the blind hole formed by the stop, the magnetic shielding ring, and the fixing block. A valve seat is also installed at the bottom of the fixing block.

[0008] The valve seat includes a threaded connecting block and a support ring fixed to the top of the connecting block. The threaded connecting block has an outlet channel in the middle. The top surface of the threaded connecting block is the valve seat interface. The area between the inner side of the support ring and the valve seat interface is an annular cavity. The bottom end of the valve core is located in the annular cavity.

[0009] The valve core is either a split valve core or an integrated valve core. A spring is installed between the valve core and the electromagnetic component. The magnetic shielding gasket is located between the valve core and the lower end face of the stop. When the magnetic shielding gasket is in a free state, there is an air gap between it and the lower end face of the stop.

[0010] As a further explanation of the present invention, the split valve core includes an armature, a valve core head, a retaining ring and a disc spring. An armature blind hole is provided at the top center of the armature. A first through channel is also obliquely provided in the armature. The armature blind hole is connected to the lower end face of the armature through the first through channel.

[0011] A spring cavity is formed between the blind hole of the armature and the lower end face of the stop, and the spring is installed in the spring cavity;

[0012] The valve core head has a threaded rod at its top, which connects to a blind hole at the bottom of the armature. A disc spring and a retaining ring are sleeved on the outside of the threaded rod. When the disc spring is in its free state, there is a gap between it and the lower end face of the retaining ring. The width of the gap is 0.25 to 0.33 times the stroke of the solenoid valve.

[0013] As a further explanation of the present invention, the retaining ring includes an outer ring and an inner ring, the outer ring is fixed to the outside of the inner ring, and a through hole is provided between the outer ring and the inner ring.

[0014] The first through channel is provided with 1 to 4, and the number of through holes is the same as the number of the first through channel.

[0015] As a further explanation of the present invention, the integrated valve core is provided with a shoulder, the upper surface of the shoulder is an annular mounting surface, and a disc spring is provided on the annular mounting surface. In this state, the upper contact surface of the disc spring is in contact with the lower surface of the interface between the stepped hole and the disc spring. When the disc spring is in a free state, the gap between it and the annular mounting surface is 0.25 to 0.33 times the solenoid valve stroke.

[0016] As a further explanation of the present invention, the integrated valve core also has a blind hole, an upper end face of the valve core, a second through channel and a lower end face of the valve core. A spring cavity is formed between the lower end face of the blind hole stop and the spring is installed in the spring cavity. The second through channel is used to complete the connection between the upper end face of the valve core and the lower end face of the valve core.

[0017] As a further explanation of the present invention, a sealing component is provided between the lower end face of the valve core and the valve seat interface on the threaded connecting block.

[0018] As a further explanation of the present invention, an annular gap is provided between the valve core and the intermediate blind hole formed by the stop, the magnetic shielding ring and the fixing block.

[0019] As a further explanation of the present invention, the coil is specifically a self-adhesive coil, which is inserted from the top of the inlet connector and the stop during installation.

[0020] As a further explanation of the present invention, the outer shell has a through hole and the fixing block has a threaded hole. The fixing effect of the outer shell and the fixing block is achieved by the cooperation of the screw with the through hole and the threaded hole.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. In this invention, due to the use of a nested valve core design method, the disc spring can be installed at the lower end of the valve core, so that the thickness of the disc spring is not affected by the remaining air gap, and a disc spring with a larger force value can be used, thereby greatly enhancing the role of the disc spring in improving the closing response characteristics of the solenoid valve. At the same time, due to this decoupling structure, in the optimization design of the solenoid valve itself, there is no need to consider the problem of matching with the disc spring structure.

[0023] 2. Because the present invention decouples the disc spring from the air gap of the solenoid valve, the maximum compression state of the disc spring is no longer limited. By adjusting the compression state of the disc spring through the threaded structure, the nonlinear force characteristics of the disc spring can be fully utilized, and different acceleration closing force variation characteristics can be achieved to meet the control requirements of the fast response solenoid valve for the variation of the closing additional force.

[0024] 3. This invention uses a self-adhesive coil, which is an integrated finished coil. It features high standardization and automation, and low cost. To meet the requirements for the assembly of finished coils, the outer diameter of the inlet connector and the diameter of the stop are both set to be smaller than the inner diameter of the coil, which facilitates the installation of the self-adhesive coil. This measure can significantly reduce the production cycle of the solenoid valve and reduce the cost of the solenoid valve. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the split valve core assembly structure of the present invention;

[0026] Figure 2 yes Figure 1 Enlarged view of the structure at point A in the middle.

[0027] Figure 3 This is a schematic diagram of the valve seat structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the split valve core structure of the present invention;

[0029] Figure 5This is a schematic diagram of the gap between the split valve core disc spring of the present invention;

[0030] Figure 6 This is a structural diagram of the retaining ring of the split valve core of the present invention;

[0031] Figure 7 This is a structural diagram of the electromagnetic component of the present invention;

[0032] Figure 8 This is a structural diagram of the outer casing of the present invention;

[0033] Figure 9 This is a structural diagram of the fixing block of the present invention;

[0034] Figure 10 This is a schematic diagram of the integrated valve core assembly structure of the present invention;

[0035] Figure 11 This is a structural diagram of the integrated valve core of the present invention;

[0036] Figure 12 This is a schematic diagram of the enlarged annular gap structure in this invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1-Electromagnetic assembly; 11-Stop; 111-Lower end face of stop; 12-Magnetic shielding ring; 13-Fixing block; 132-Threaded hole; 14-Outer shell; 141-Through hole; 15-Inlet nozzle; 2-Valve seat; 21-Connecting block; 22-Support ring; 23-Outlet channel; 24-Valve seat interface; 25-Annular cavity; 3-Valve core; 31-Armature; 311-Armature blind hole; 313-First through channel; 3 14-Legion lower end face; 32-Valve core head; 33-Retaining ring; 331-Outer ring; 332-Inner ring; 333-Through hole; 34-Disc spring; 31'-Shoulder; 311'-Annular mounting surface; 32'-Blind hole; 33'-Valve core upper end face; 34'-Second through channel; 35'-Valve core lower end face; 4-Spring; 5-Coil; 6-Magnetic shielding gasket; 7-Annular gap; 8-Air gap; 9-Screw. Detailed Implementation

[0039] 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.

[0040] like Figure 1-12As shown, the present invention provides a technical solution: a fast-response solenoid valve with a nested disc spring structure, including an electromagnetic component 1, a valve seat 2, a valve core 3, a spring 4, a coil 5, and a magnetic shielding pad 6;

[0041] The electromagnetic component 1 includes a stop 11, a magnetic shielding ring 12, a fixing block 13, a housing 14, and an inlet nozzle 15. The fixing block 13 has a stepped hole interface 131. The top of the stop 11 has an inlet nozzle 15. The magnetic shielding ring 12 is provided between the stop 11 and the fixing block 13. The bottom of the housing 14 is fixed to the outside of the fixing block 13. The housing 14 has a through hole 141. The fixing block 13 has a threaded hole 132. The fixing of the housing 14 and the fixing block 13 is achieved by the cooperation of the screw 9 with the through hole 141 and the threaded hole 132.

[0042] The connection between the stop 11, the magnetic shielding ring 12 and the fixing block 13 is completed under the action of the outer shell 14. The coil 5 is installed in the cavity formed by the stop 11, the magnetic shielding ring 12, the fixing block 13 and the outer shell 14. The coil 5 is specifically a self-adhesive coil, which is inserted from the inlet connector 15 and the top of the stop 11 during installation.

[0043] A valve core 3 is installed in the intermediate blind hole formed by the stop 11, the magnetic shielding ring 12 and the fixing block 13, and a valve seat 2 is also installed at the bottom of the fixing block 13.

[0044] The valve seat 2 includes a threaded connecting block 21 and a support ring 22 fixed to the top of the connecting block 21. The threaded connecting block 21 has an outlet channel 23 in the middle. The top surface of the threaded connecting block 21 is the valve seat interface 24. The area between the inner side of the support ring 22 and the valve seat interface 24 is an annular cavity 25. The bottom end of the valve core 3 is located in the annular cavity 25.

[0045] The valve core 3 is either a split valve core or an integrated valve core;

[0046] The split valve core includes an armature 31, a valve core head 32, a retaining ring 33, and a disc spring 34. An armature blind hole 311 is provided at the top center of the armature 31. A first through channel 313 is also obliquely provided in the armature 31. The armature blind hole 311 is connected to the lower end face 314 of the armature through the first through channel 313.

[0047] A spring cavity is formed between the blind hole 311 of the armature and the lower end face 111 of the stop, and the spring 4 is installed in the spring cavity;

[0048] The valve core head 32 is provided with a threaded rod 321 at the top end. The threaded rod 321 is connected to the blind hole at the bottom end of the armature 31. A disc spring 34 and a retaining ring 33 are sleeved on the outside of the threaded rod 321. When the disc spring 34 is in the free state, there is a gap 35 between it and the lower end face of the retaining ring 33. The width of the gap 35 is 0.25 to 0.33 times the stroke of the solenoid valve.

[0049] The retaining ring 33 includes an outer ring 331 and an inner ring 332. The outer ring 331 is fixed to the outside of the inner ring 332, and a through hole 333 is provided between the outer ring 331 and the inner ring 332.

[0050] The first through channel 313 is provided with 1 to 4, and the number of through holes 333 is the same as the number of the first through channel 313.

[0051] The integrated valve core is provided with a shoulder 31', the upper surface of which is an annular mounting surface 311'. A disc spring 34 is provided on the annular mounting surface 311'. In this state, the upper contact surface of the disc spring 34 is in contact with the lower surface of the stepped hole interface 131. When the disc spring 34 is in a free state, the gap between it and the annular mounting surface 311' is 0.25 to 0.33 times the solenoid valve stroke.

[0052] The integrated valve core also has a blind hole 32', an upper end face 33', a second through channel 34', and a lower end face 35'. A spring cavity is formed between the lower end face 111 of the blind hole 32' and the stop iron. The spring 4 is installed in the spring cavity. The second through channel 34' is used to complete the connection between the upper end face 33' and the lower end face 35' of the valve core.

[0053] A spring 4 is installed between the valve core 3 and the electromagnetic component 1. The magnetic shielding pad 6 is located between the valve core 3 and the lower end face 111 of the stop. When the magnetic shielding pad 6 is in a free state, there is an air gap 8 between it and the lower end face 111 of the stop.

[0054] A sealing assembly is provided between the lower end face of the valve core 3 and the valve seat interface 24 on the threaded connection block 21.

[0055] An annular gap 7 is provided between the valve core 3 and the intermediate blind hole formed by the stop iron 11, the magnetic shielding ring 12 and the fixing block 13.

[0056] In practical use, when the valve core 3 is selected as a split valve core, when the fast-response solenoid valve is not energized, the spring 4 presses the valve core 3 onto the valve seat 2 to form a seal. After the medium passes through the inlet channel 151 in the inlet connector 15, it is collected into the annular cavity 25 through the first through channel 313 on the valve core 3 and the through channel 333 on the retaining ring 33. The entire valve core 3 is surrounded by the medium except for the sealing part. The valve core 3 is subjected to the medium force acting on the sealing area, which is in the direction of valve core closing, that is, downward, thus enhancing the sealing effect of the valve core 3.

[0057] In this state, when the fast-response solenoid valve is energized, an electromagnetic attraction is generated in the air gap 7 between the stop 11 and the valve core 3. When the attraction is greater than the sum of the spring force of the spring 4 and the medium force, the valve core 3 moves upward away from the valve seat 2 and contacts the disc spring 34. The disc spring 34 generates a downward disc spring force, which increases non-linearly from 0 to the maximum value. During this process, as the air gap 7 decreases, the electromagnetic attraction also increases non-linearly, which can still overcome the combined force of the spring force, the medium force and the disc spring force. Finally, the valve core 3 moves upward and fits against the magnetic isolation gasket 6, opening the sealing assembly between the annular cavity 25 and the outlet channel 23. The medium flows into the outlet channel 23 through the solenoid valve. At this time, the disc spring 34 is also compressed to the maximum compression state by the valve core 3 and the stop ring 33, and the disc spring force also increases to the maximum state.

[0058] If the fast-response solenoid valve is de-energized at this time, the disc spring force and the spring force will overcome the remaining suction force in the air gap 7, causing the valve core 3 to move downward until it is pressed onto the valve seat 2 to form a seal. The disc spring's effect on improving the closing response of the fast-response solenoid valve lies in the additional disc spring force at this time.

[0059] An experimental example is shown below, demonstrating the application of the aforementioned solenoid valve in a hydraulic control system:

[0060] A fast-response solenoid valve is used as the actuator for BangBang control pressure regulation in a certain hydraulic control system. According to the design requirements, the system working medium is high-pressure water with a pressure of 8MPa, the system control voltage is 27V, and the flow rate is 8g / s.

[0061] The experiment shows that, without an external control circuit, the solenoid valve has an opening time of 4ms, a closing time of 3ms, a flow resistance of 0.2MPa at a flow rate of 8g / s, and a weight of 0.06kg.

[0062] This valve is remotely controlled via electrical pulse signals, enabling dynamic pressure regulation in hydraulic systems. It boasts excellent performance characteristics such as being lightweight, compact, having a fast response time, and low power consumption. It can be widely applied to applications requiring rapid response.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fast-response solenoid valve with a nested disc spring structure, characterized in that: Includes an electromagnetic assembly (1), a valve seat (2), a valve core (3), a spring (4), a coil (5), and a magnetic shielding gasket (6). The electromagnetic component (1) includes a stop (11), a magnetic shielding ring (12), a fixing block (13), a housing (14), and an inlet nozzle (15). The fixing block (13) has a stepped hole interface (131). The top of the stop (11) has an inlet nozzle (15). The magnetic shielding ring (12) is provided between the stop (11) and the fixing block (13). The bottom of the housing (14) is fixed to the outside of the fixing block (13). Under the action of the outer shell (14), the connection between the stop (11), the magnetic shielding ring (12) and the fixing block (13) is completed. The coil (5) is installed in the cavity formed by the stop (11), the magnetic shielding ring (12), the fixing block (13) and the outer shell (14). The valve core (3) is installed in the middle blind hole formed by the stop (11), the magnetic shielding ring (12) and the fixing block (13). The valve seat (2) is also installed at the bottom of the fixing block (13). The valve seat (2) includes a threaded connecting block (21) and a support ring (22) fixed to the top of the connecting block (21). The threaded connecting block (21) has an outlet channel (23) in the middle. The top surface of the threaded connecting block (21) is the valve seat interface (24). The area between the inner side of the support ring (22) and the valve seat interface (24) is an annular cavity (25). The bottom end of the valve core (3) is located in the annular cavity (25). The valve core (3) is a split valve core or an integrated valve core. A spring (4) is installed between the valve core (3) and the electromagnetic component (1). The magnetic shielding pad (6) is located between the valve core (3) and the lower end face (111) of the stop. When the magnetic shielding pad (6) is in a free state, there is an air gap (8) between it and the lower end face (111) of the stop.

2. A fast-response solenoid valve with a nested disc spring structure according to claim 1, characterized in that, The split valve core includes an armature (31), a valve core head (32), a retaining ring (33), and a disc spring (34). An armature blind hole (311) is provided at the top center of the armature (31). A first through channel (313) is also provided obliquely inside the armature (3). The armature blind hole (311) is connected to the lower end face (314) of the armature through the first through channel (313). A spring cavity is formed between the blind hole (311) of the armature and the lower end face (111) of the stop, and the spring (4) is installed in the spring cavity; The valve core head (32) is provided with a threaded rod (321) at the top end. The threaded rod (321) is connected to the blind hole at the bottom end of the armature (31). A disc spring (34) and a retaining ring (33) are sleeved on the outside of the threaded rod (321). When the disc spring (34) is in a free state, there is a gap (35) between it and the lower end face of the retaining ring (33). The width of the gap (35) is 0.25 to 0.33 times the stroke size of the solenoid valve.

3. A fast-response solenoid valve with a nested disc spring structure according to claim 2, characterized in that, The retaining ring (33) includes an outer ring (331) and an inner ring (332). The outer ring (331) is fixed to the outside of the inner ring (332), and a through hole (333) is provided between the outer ring (331) and the inner ring (332). The first through channel (313) is provided with 1 to 4, and the number of through holes (333) is the same as the number of the first through channel (313).

4. A fast-response solenoid valve with a nested disc spring structure according to claim 1, characterized in that, The integrated valve core is provided with a shoulder (31'), the upper surface of which is an annular mounting surface (311'). A disc spring (34) is provided on the annular mounting surface (311'). In this state, the upper contact surface of the disc spring (34) is in contact with the lower surface of the stepped hole interface (131). When the disc spring (34) is in a free state, the gap between it and the annular mounting surface (311') is 0.25 to 0.33 times the solenoid valve stroke.

5. A fast-response solenoid valve with a nested disc spring structure according to claim 4, characterized in that, The integrated valve core also has a blind hole (32'), an upper end face (33'), a second through channel (34'), and a lower end face (35'). A spring cavity is formed between the blind hole (32') and the lower end face (111) of the stop iron. The spring (4) is installed in the spring cavity. The second through channel (34') is used to complete the connection between the upper end face (33') and the lower end face (35') of the valve core.

6. A fast-response solenoid valve with a nested disc spring structure according to claim 1, characterized in that, A sealing assembly is provided between the lower end face of the valve core (3) and the valve seat interface (24) on the threaded connection block (21).

7. A fast-response solenoid valve with a nested disc spring structure according to claim 1, characterized in that, An annular gap (7) is provided between the valve core (3) and the intermediate blind hole formed by the stop (11), the magnetic shielding ring (12) and the fixing block (13).

8. A fast-response solenoid valve with a nested disc spring structure according to claim 1, characterized in that, The coil (5) is specifically a self-adhesive coil, which is inserted from the top of the inlet connector (15) and the stop (11) during installation.

9. A fast-response solenoid valve with a nested disc spring structure according to claim 1, characterized in that, The outer shell (14) has a through hole (141), and the fixing block (13) has a threaded hole (132). The outer shell (14) and the fixing block (13) are fixed by the cooperation of the screw (9) with the through hole (141) and the threaded hole (132).

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