Rigidity valve

Abstract

The rigidity valve comprises a valve body and a valve seat, the valve body comprises a valve element and an electromagnetic driving mechanism, and the electromagnetic driving mechanism comprises an electromagnetic coil, a magnetism isolating sleeve and a movable iron core; a magnetic conductive base of the magnetic conductive assembly is connected to a magnetic isolation sleeve in a sleeving mode, the magnetic conductive base is connected with at least one permanent magnet in the circumferential direction, each permanent magnet comprises a first magnet, a second magnet and a third magnet which are distributed in the axial direction, and the longitudinal section of each permanent magnet is in a T shape so that containing spaces can be formed between the first magnet and the magnetic isolation sleeve and between the third magnet and the magnetic isolation sleeve. And a magnetic conducting ring is connected in each accommodating space. The rigidity valve is high in magnetic energy utilization rate, low in power consumption, low in noise and long in service life.

Description

Technical Field

[0001] The present application relates to the technical field of automobile air suspension system control valves, and in particular to a stiffness valve for an air suspension system. Background Art

[0002] Automotive air suspension is a device that controls the vehicle's suspension height through air pressure. The air suspension control solenoid valve is a crucial component in automotive air suspension systems. Its primary function is to control inflation or deflation, adjusting the air spring stiffness based on varying road conditions. Therefore, this solenoid valve is also known as the stiffness valve.

[0003] A related art stiffness valve for an automotive air suspension system comprises a valve body, an electromagnetic drive unit, a valve core, and a valve stem. One end of the valve stem is connected to the electromagnetic drive unit's armature and moves synchronously with the armature. The other end of the valve stem is connected to the valve core. Axial movement of the valve stem drives the valve core toward or away from the valve opening of the valve body, thereby closing or opening the valve opening. For example, Chinese patent application CN220286430U, entitled "Solenoid Valve," utilizes a magnetic field generated by an electromagnetic coil to drive the axial movement of a movable iron core, thereby controlling the opening and closing of the valve. When the electromagnetic coil is energized, the generated magnetic field attracts the movable iron core, pushing a sealing piston to close the valve. When the electromagnetic coil is de-energized, the movable iron core and sealing piston return to their initial positions due to spring force. However, maintaining the valve closed requires continuous flow of a high current through the electromagnetic coil, which not only increases the solenoid valve's power consumption but also increases heat generation, shortening its service life. Furthermore, when the current drops to zero, the residual magnetism of the electromagnetic coil is low, and the residual electromagnetic force is insufficient to effectively offset the spring force, resulting in a rapid valve closing speed and, in turn, loud noise.

[0004] To this end, permanent magnets have been incorporated into solenoid valves or stiffness control valves. The superposition of the permanent magnet's magnetic field and the electromagnetic coil's magnetic field reduces the solenoid valve's power consumption and improves its response speed. For example, in Chinese patent application CN221347884U, entitled "Solenoid Valve," a permanent magnet is mounted on the valve body surrounding the moving iron core to magnetize the moving iron core. Another example is Chinese patent application CN219911944U, entitled "Stiffness Control Valve," which incorporates a magnetically conductive assembly mounted on a magnetically isolating sleeve. This assembly comprises a retaining ring and a magnetic steel block disposed within a groove within the retaining ring's inner annular surface.

[0005] The solenoid valve or stiffness valve with permanent magnets in the above-mentioned related technologies has the following defects in actual use: First, although the permanent magnet in the solenoid valve or stiffness valve can provide pre-magnetized magnetic energy for the solenoid valve or stiffness valve and reduce some power consumption, the side or side and end faces of the permanent magnet are wrapped by magnetic conductive materials, resulting in a large amount of magnetic flux leakage from the permanent magnet. In addition, the magnetic pole edge of the permanent magnet has obvious magnetic leakage, resulting in low efficiency of magnetic energy utilization; therefore, it still requires a large current to maintain the closed state of the valve, and the power consumption reduction is not obvious. Furthermore, due to the concentration of magnetic flux at the magnetic pole edge of the permanent magnet, the magnetic field strength at the magnetic pole edge increases significantly, thereby affecting the overall performance of the magnetic circuit. That is, the existence of the magnetic circuit edge effect leads to low magnetic energy utilization, resulting in high power consumption, high heat generation and short service life of the solenoid valve. Utility Model Content

[0006] The technical problem to be solved by the present application is to overcome the defects of the above-mentioned related technologies and provide a rigidity valve with high magnetic energy utilization, low power consumption, low noise and long service life.

[0007] The technical solution of this application is to provide a rigidity valve having the following structure:

[0008] A valve body and a valve seat, wherein the valve body includes a valve core and an electromagnetic drive mechanism for driving the valve core to axially move to open or close the valve seat, wherein the electromagnetic drive mechanism includes an electromagnetic coil, a magnetic isolation sleeve, and a movable iron core that slides in the magnetic isolation sleeve and is connected to the valve core;

[0009] A magnetic conductive assembly, comprising a magnetic conductive seat sleeved on the magnetic isolation sleeve, the magnetic conductive seat being circumferentially connected to at least one permanent magnet, each of the permanent magnets comprising a first magnet, a second magnet, and a third magnet distributed along the axial direction, the first magnet being magnetized in an outward-inward direction and inclined away from the second magnet, the second magnet being magnetized in an outward-inward direction and radially arranged, and the third magnet being magnetized in a mirror-symmetrical direction relative to the second magnet; and

[0010] The longitudinal section of the permanent magnet is T-shaped so that an accommodation space is formed between the first magnet and the third magnet and the magnetic isolation sleeve respectively, and a magnetic conductive ring is connected in each of the accommodation spaces.

[0011] In some embodiments, the first magnet, the second magnet, and the third magnet are all arc-shaped blocks extending circumferentially along the magnetic base, and the distance from the inner side wall of the first magnet and the third magnet to the magnetic isolation sleeve is greater than the distance from the inner side wall of the second magnet to the magnetic isolation sleeve.

[0012] In some embodiments, the inner wall of the magnetic base is circumferentially provided with at least one mounting groove that passes through the two end surfaces of the magnetic base, and the permanent magnet is connected in the mounting groove; the two magnetic rings are circumferentially extended along the magnetic isolation sleeve, and the outer sides of the two magnetic rings are respectively fitted with the inner sides of the first magnet and the third magnet, and there is a gap between the inner sides of the two magnetic rings and the outer sides of the magnetic isolation sleeve and they are flush with the inner sides of the second magnet.

[0013] In some embodiments, two permanent magnets are circumferentially disposed in each mounting slot, and a separation gap is provided between the two permanent magnets.

[0014] In some embodiments, the magnetic conductive base is provided with two mounting grooves symmetrically about the center of the magnetic isolation sleeve along the circumferential direction.

[0015] In some embodiments, the magnetic conductive component is located at an end of the electromagnetic coil away from the valve core and abuts against an end surface of the electromagnetic coil.

[0016] In some embodiments, the valve body includes a valve housing and a valve stem and a stop iron connected to the valve housing, the stop iron has a center hole, the valve stem is clearance-fitted in the center hole, and one end of the valve stem is connected to the moving iron core, and the other end of the valve stem is connected to the valve core; the end of the valve housing away from the valve seat is connected to an electrical connection seat electrically connected to the electromagnetic drive mechanism, and the inner end of the electrical connection seat is against the magnetic conductive component.

[0017] In some embodiments, an accommodating cavity coaxial with the center hole is provided on the end surface of the stop iron close to the valve seat, and the valve core is at least partially accommodated in the accommodating cavity; the end of the valve core close to the stop iron is connected to a shock-absorbing seat convex axially outward, and the free end of the valve core is connected to a sealing body that seals against the valve port of the valve seat.

[0018] In some embodiments, a first mounting hole coaxial with the center hole is provided on the end surface of the stop iron near one end of the moving iron core, and a second mounting hole coaxial with the center hole is provided on the end surface of the moving iron core near one end of the stop iron, an elastic member is provided between the moving iron core and the stop iron, and one end of the elastic member is connected to the first mounting hole and the other end of the elastic member is connected to the second mounting hole.

[0019] In some embodiments, an annular connecting groove is provided on the inner peripheral wall of the accommodating cavity, an annular sealing member is connected to the annular connecting groove, and the annular sealing member is provided with a sealing surface on the side close to the accommodating cavity that is sealed to the outer side wall of the valve core and extends axially along the valve core.

[0020] In summary, the stiffness valve of the present application has the following advantages compared with the related art:

[0021] First, the stiffness valve has a magnetic conductive component connected to the magnetic isolation sleeve, and a permanent magnet connected to the magnetic seat of the magnetic conductive component. This permanent magnet, while magnetizing the moving iron core, can also cause the moving iron core to cut the magnetic flux lines generated by the permanent magnet to generate resistance when the moving iron core drives the valve core to close the valve seat, thereby reducing the speed of the valve core movement to close the valve, thereby reducing the impact sound and noise. Before the electromagnetic coil is energized, the permanent magnet pre-magnetizes the moving iron core, thereby reducing the time required for the electromagnetic coil to magnetize the moving iron core, increasing the rate of increase of the magnetic force generated by the moving iron core, and improving the response speed of the stiffness valve. When the valve core closes the valve seat and maintains the valve seat closed, the magnetic force generated by the permanent magnet is superimposed with the electromagnetic force generated by the electromagnetic coil, thereby reducing the current flowing into the electromagnetic coil, thereby reducing the power consumption and heat generation of the stiffness valve, and extending the service life of the stiffness valve.

[0022] Secondly, the permanent magnets of the magnetic conductive assembly of the stiffness valve include a first magnet, a second magnet and a third magnet distributed axially along the magnetic isolation sleeve. The magnetization direction of the first magnet is from the outside to the inside and inclined in the direction away from the second magnet. The magnetization direction of the second magnet is radially arranged from the outside to the inside, and the magnetization direction of the third magnet is mirror-symmetrical with the magnetization direction of the first magnet relative to the magnetization direction of the second magnet. With this arrangement, most of the magnetic flux of the permanent magnet formed by the axial superposition of the first magnet, the second magnet and the third magnet is concentrated in the working area of the moving iron core, making the magnetic field strength in the working area of the moving iron core stronger, improving the utilization rate of magnetic energy, significantly reducing the power consumption of the stiffness valve, achieving good energy-saving effect and further improving the service life.

[0023] Furthermore, the longitudinal cross-section of the permanent magnet is T-shaped so that a magnetic ring is connected to the inner accommodating space of the first magnet and the third magnet. The magnetic ring can prevent magnetic leakage at the pole edge of the permanent magnet and can compress the divergent part of the main magnetic flux of the permanent magnet at the pole edge of the magnetic ring, thereby achieving a magnetic concentration effect; the magnetic ring guides the magnetic energy gathered at the pole edge of the permanent magnet, avoiding a significant increase in the magnetic field intensity at the pole edge, thereby making the overall performance of the magnetic circuit more stable, further improving the effective magnetic flux, and improving the utilization rate of magnetic energy. When the valve core closes the valve seat and maintains the closure, only a small current needs to be passed through the electromagnetic coil, significantly reducing power consumption and heat generation, and further extending the service life of the rigid valve. Moreover, when the rigid valve needs to be opened, due to the high utilization rate of magnetic energy, the rigid valve has a large amount of residual magnetism, and the residual magnetic force can effectively offset the force of the moving iron core moving away from the valve seat, thereby reducing the impact sound of the valve core and the inner iron stop of the valve body, reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of a stiffness valve in some embodiments of the present application.

[0025] Figure 2 is a cross-sectional view of a stiffness valve according to some embodiments of the present application.

[0026] Figure 3 This is a schematic diagram of the assembly structure of a stiffness valve in some embodiments of the present application.

[0027] Figure 4 is a cross-sectional view of a stiffness valve according to some embodiments of the present application.

[0028] Figure 5 This is a schematic diagram of the installation structure of a magnetic conductive component of a stiffness valve in some embodiments of the present application.

[0029] Figure 6 This is a structural schematic diagram of a magnetic conductive component of a stiffness valve in some embodiments of the present application.

[0030] Figure 7 This is a schematic diagram of the assembly structure of a magnetic conductive component of a stiffness valve in some embodiments of the present application.

[0031] Figure 8 This is a schematic structural diagram of a permanent magnet of a magnetic conductive component of a stiffness valve in some embodiments of the present application.

[0032] Figure 9 This is a three-dimensional diagram of the cross-sectional structure of a magnetic conductive component of a stiffness valve in some embodiments of the present application.

[0033] Figure 10 This is a cross-sectional view of a magnetic conductive component of a stiffness valve in some embodiments of the present application.

[0034] Figure 11 yes Figure 10 A magnified structure diagram of part A in .

[0035] Description of reference numerals:

[0036] 1. Valve body, 100. Valve housing, 101. Second annular groove, 102. Second sealing ring, 103. Valve stem, 104. Valve core, 105. Stop iron, 106. Second positioning hole, 107. Elastic member, 108. Center hole, 109. Accommodating cavity, 110. Annular connecting groove, 111. Annular sealing member, 112. Sealing surface, 113. Shock absorber seat, 114. First annular groove, 115. First sealing ring, 2. Valve seat, 200. First air hole, 201. Second air hole, 202. Valve port, 20 3. Third sealing ring, 204. Third annular groove, 3. Electrical connection seat, 4. Electromagnetic drive mechanism, 400. Electromagnetic coil, 401. Magnetic isolation sleeve, 402. Moving iron core, 403. First positioning hole, 5. Magnetic conductive component, 500. Magnetic conductive seat, 501. Mounting groove, 502. First magnet, 503. Second magnet, 504. Third magnet, 505. Magnetic conductive ring, 506. Separation gap, 507. Accommodating space, 508. First magnetizing direction, 509. Second magnetizing direction, 510. Third magnetizing direction. DETAILED DESCRIPTION

[0037] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0038] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0039] In the embodiments of the present application, 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 higher in 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 lower in level than the second feature.

[0040] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1 to 3As shown; the embodiment of the present application discloses a stiffness valve, which is used for an air pressure control valve of an automobile air suspension system. Its structure includes a valve body 1 and a valve seat 2 connected to the valve body 1. The valve body 1 includes a valve core 104 and an electromagnetic drive mechanism 4 that drives the valve core 104 to move axially to open or close the valve seat 2; the valve seat 2 has a valve cavity and a first air hole 200 provided at the end of the valve seat 2, a plurality of second air holes 201 provided on the side wall of the valve seat 2, and a valve port 202 provided in the valve seat 2 and connecting the first air hole 200 and the second air hole 201; the valve core 104 is clearance-fitted in the valve cavity and is used to open or close the valve port 202. The electromagnetic drive mechanism 4 includes an electromagnetic coil 400, a magnetic isolation sleeve 401, and a moving iron core 402 that slides axially in the magnetic isolation sleeve 401. The electromagnetic coil 400 is sleeved on the outside of the magnetic isolation sleeve 401.

[0042] Further in this embodiment, Figure 2 As shown, the valve body 1 also includes a valve housing 100, which is connected to a valve stem 103 and a stop iron 105. The stop iron 105 is fixedly connected between the electromagnetic drive mechanism 4 and the valve seat 2. The stop iron 105 has a center hole 108, and the valve stem 103 is clearance-fitted in the center hole 108. One end of the valve stem 103 is connected to the moving iron core 402, and the other end of the valve stem 103 is connected to the valve core 104; the end of the valve housing 100 close to the electromagnetic drive mechanism 4 is connected to an electrical connection seat 3 electrically connected to the electromagnetic drive mechanism 4, and the end of the valve housing 100 close to the stop iron 105 is connected to the valve seat 2; the electrical connection seat 3 is electrically connected to the electromagnetic coil 400 of the electromagnetic drive mechanism 4, and the electromagnetic coil 400 is energized to generate electromagnetic force to drive the moving iron core 402 to move axially, and the moving iron core 402 drives the valve core 104 to move through the valve stem 103 to adjust the opening of the valve port 202. The first and second air holes 200 and 201 of the stiffness valve in this embodiment of the present application are each connected to an air spring chamber in a vehicle's air suspension system. When the air spring needs to be closed to maintain or stabilize air pressure, the electromagnetic drive mechanism 4 drives the valve core 104 to close the valve port 202. When the air spring pressure drops significantly and needs to be replenished, the electromagnetic drive mechanism 4 drives the valve core 104 to open the valve port 202.

[0043] In this embodiment, the first air hole 200 and the second air hole 201 both have air inlet and outlet, such as the first air hole 200 for air inlet and the second air hole 201 for air outlet; or the first air hole 200 for air outlet and the second air hole 201 for air inlet.

[0044] In this embodiment, if Figure 2 and Figure 3As shown, an accommodating cavity 109 coaxial with the center hole 108 of the stop iron 105 is provided on the end face of the stop iron 105 close to the valve seat 2, and the accommodating cavity 109 is cylindrical, and its inner diameter is adapted to the outer diameter of the valve core 104; the valve core 104 is at least partially accommodated in the accommodating cavity 109; that is, when the valve core 104 moves axially, a part of the valve core 104 is always in the accommodating cavity 109; in the embodiment of the present application, the end of the valve core 104 close to the stop iron 105 is connected to a shock-absorbing seat 113 protruding outward along the axial direction, and the free end face of the valve core 104 is connected to a sealing body that seals against the valve port 202. When the valve core 104 opens the valve port 202 , the shock absorbing seat 113 of the valve core 104 abuts against the bottom of the accommodating cavity 109 of the stop iron 105 , and when the valve core 104 closes the valve port 202 , the sealing body on the free end face of the valve core 104 abuts against the valve port 202 for sealing.

[0045] It is easy to understand that, in this embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, to improve the sealing performance of the solenoid valve, a first annular groove 114 is provided on the outer wall of the stop iron 105. A first sealing ring 115 is connected to the inner wall of the valve housing 100. Furthermore, to improve the sealing performance and stability of the solenoid valve during installation, a second annular groove 101 is formed radially inward at the end of the valve housing 100 away from the valve seat 2. A second sealing ring 102 is connected to the second annular groove 101. Furthermore, a third annular groove 204 is provided on the outer peripheral wall of the valve seat 2. A third sealing ring 203 is connected to the third annular groove 204.

[0046] like Figure 2 As shown, in this embodiment, a first positioning hole 403 coaxial with the center hole 108 is provided on the end surface of the stop iron 105 near the end of the movable iron core 402, and a second positioning hole 106 coaxial with the center hole 108 is provided on the end surface of the movable iron core 402 near the stop iron 105. An elastic member 107 is provided between the movable iron core 402 and the stop iron 105, with one end of the elastic member 107 connected to the first positioning hole 403 and the other end of the elastic member 107 connected to the second positioning hole 106. The elastic member 107 is a spring. When the electromagnetic drive mechanism 4 drives the valve core 104 to close the valve port 202, the elastic member 107 is compressed. When the electromagnetic drive mechanism 4 loses power, the elastic member 107 returns to its original position and drives the movable iron core 402 to return to its original position, thereby causing the valve core 104 to quickly open the valve port 202.

[0047] Further in this embodiment, Figure 2As shown, to ensure the sealing of the outer wall of the valve core 104, the rigidity valve is provided with an annular connecting groove 110 on the inner peripheral wall of the accommodating cavity 109 of the stop iron 105. An annular sealing member 111 is connected to the annular connecting groove 110. The side of the annular sealing member 111 close to the accommodating cavity 109 is provided with a sealing surface 112 that seals against the outer wall of the valve core 104 and extends axially along the valve core 104. The provision of the sealing surface 112 increases the contact area between the annular sealing member 111 and the outer wall of the valve core 104, thereby improving the sealing effect and making the axial movement of the valve core 104 more stable.

[0048] It can be understood that when the stiffness valve is in the power-off state, the valve port 202 is in the open state; when the electromagnetic coil 400 is energized, a magnetic field is generated, thereby magnetizing the moving iron core 402 and the stop iron 105. When the magnetic attraction between the moving iron core 402 and the stop iron 105 is greater than the elastic force of the elastic member 107, the moving iron core 402 is driven to move toward the valve seat 2 and the valve core 104 closes the valve port 202; in the process of maintaining the valve port 202 closed, the electromagnetic coil 400 needs to pass a larger current to generate a larger electromagnetic force to maintain the closed state of the valve port 202; similarly, if the electromagnetic coil 400 loses power, under the action of the elastic member 107, the moving iron core 402 drives the valve core 104 to open the valve port 202 through the valve stem 103.

[0049] Furthermore, when the electromagnetic coil 400 is energized and drives the movable iron core 402 toward the valve seat 2 to close the valve port 202, if the movable iron core 402 moves at a high speed, the sealing member at the free end face of the valve core 104 will collide with the valve port 202, causing a significant impact and generating noise. Similarly, after the electromagnetic coil 400 is de-energized, if the residual magnetism between the movable iron core 402 and the stop iron 105 is low, the movable iron core 402 will quickly reset, causing the shock absorber 113 at the rear end of the movable iron core 402 to collide with the bottom of the accommodating cavity 109 of the stop iron 105, generating a significant impact noise.

[0050] In this embodiment, the stiffness valve also includes a magnetic conductive component 5, which includes a magnetic conductive seat 500 sleeved on the magnetic isolation sleeve 401, and the magnetic conductive seat 500 is circumferentially connected to at least one permanent magnet, each permanent magnet includes a first magnet 502, a second magnet 503 and a third magnet 504 distributed along the axial direction, the magnetization direction of the first magnet 502 is from the outside to the inside and inclined in the direction away from the second magnet 503, the magnetization direction of the second magnet 503 is radially arranged from the outside to the inside, and the magnetization direction of the third magnet 504 is mirror-symmetrical with respect to the magnetization direction of the second magnet 503 and the magnetization direction of the first magnet 502.

[0051] For example, Figure 4 、 Figure 5 、 Figure 10 and Figure 11As shown, the magnetic base 500 of the magnetic conductive assembly 5 is arranged in a circular shape and is sleeved on the magnetic isolation sleeve 401. The permanent magnets connected to the magnetic base 500 include a first magnet 502, a second magnet 503 and a third magnet 504 distributed along the axial direction of the magnetic isolation sleeve 401, that is, the first magnet 502, the second magnet 503 and the third magnet 504 are stacked in sequence along the axial direction of the magnetic isolation sleeve 401; as shown in FIG. Figure 11 As shown, the magnetizing direction of the first magnet 502 is marked as a first magnetizing direction 508, the magnetizing direction of the second magnet 503 is marked as a second magnetizing direction 509, and the magnetizing direction of the third magnet 504 is marked as a third magnetizing direction 510. The first magnetizing direction 508 is inclined from the outside to the inside along the radial direction of the permanent magnet and in a direction away from the second magnet 503, and its magnetic pole is the inner upper N pole and the outer lower S pole. The second magnetizing direction 509 is radially arranged from the outside to the inside along the radial direction of the permanent magnet, and its magnetic pole is the inner N pole and the outer S pole. The third magnetizing direction 510 is inclined from the outside to the inside along the radial direction of the permanent magnet and in a direction away from the second magnet 503. The third magnetizing direction 510 is mirror-symmetrically arranged with the first magnetizing direction 508 about the second magnetizing direction 509, and its magnetic pole is the inner lower N pole and the outer upper S pole. Among them, the inside and outside refer to the permanent magnet relative to the magnetic isolation sleeve 401, the inside refers to the inner side of the permanent magnet, and the outside refers to the outer side of the permanent magnet. In this way, most of the magnetic flux of the permanent magnet formed by the axial superposition of the first magnet 502, the second magnet 503 and the third magnet 504 is concentrated in the working area of the moving iron core 402, so that the magnetic field intensity in the working area of the moving iron core 402 is stronger, the utilization rate of the magnetic energy is improved, the power consumption of the stiffness valve is significantly reduced, the energy-saving effect is good and the service life is further improved.

[0052] For example, Figure 11 As shown, with the second magnetizing direction 509 as a reference, the angle between the first magnetizing direction 508 and the second magnetizing direction 509 is 30 to 60 degrees, preferably 45 degrees; similarly, the angle between the third magnetizing direction 510 and the second magnetizing direction 509 is 30 to 60 degrees, preferably 45 degrees.

[0053] In the above embodiment, the stiffness valve has a magnetic conductive component 5 connected to the magnetic isolation sleeve 401, and a permanent magnet is connected to the magnetic seat 500 of the magnetic conductive component 5. The permanent magnet, while magnetizing the moving iron core 402, can also cause the moving iron core 402 to cut the magnetic flux lines generated by the permanent magnet to generate resistance when the moving iron core 402 drives the valve core 104 to close the valve seat 2, thereby reducing the speed at which the valve core 104 moves to close the valve, thereby reducing the impact force between the sealing body at the free end face of the valve core 104 and the valve port 202, and reducing noise. In other words, after the electromagnetic coil loses power, the magnetic field generated by the permanent magnet will continue to magnetize the moving iron core, so that there is still a magnetic attraction between the moving iron core and the fixed iron core, thereby reducing the speed at which the valve core closes the valve. It is not difficult to understand that after the electromagnetic coil loses power, the magnetic field of the electromagnetic coil does not disappear immediately, and the magnetic field still exists for a certain period of time, thereby causing a certain magnetic attraction between the moving iron core and the fixed iron core to reduce the speed at which the valve core closes the valve.

[0054] It is understood that before electromagnetic coil 400 is energized, the permanent magnet pre-magnetizes movable iron core 402, thereby reducing the time required for magnetization of movable iron core 402, increasing the rate of increase in the magnetic force generated by movable iron core 402, and improving the response speed of the stiffness valve. When valve core 104 closes valve seat 2 and maintains the closed state of valve seat 2, the magnetic force generated by the permanent magnet and the electromagnetic force generated by energizing electromagnetic coil 400 are superimposed, thereby reducing the current flowing into electromagnetic coil 400, thereby reducing the power consumption and heat generation of the stiffness valve, and thus extending the service life of the stiffness valve.

[0055] Further in the above embodiment, if Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown, the longitudinal section of the permanent magnet is T-shaped so that an accommodation space 507 is formed between the first magnet 502 and the third magnet 504 and the magnetic isolation sleeve 401, and a magnetic conductive ring 505 is connected to each accommodation space 507. Specifically, the first magnet 502, the second magnet 503 and the third magnet 504 of the permanent magnet are all arc-shaped blocks extending circumferentially along the magnetic conductive base 500, and the distance from the inner side wall of the first magnet 502 and the third magnet 504 to the magnetic isolation sleeve 401 is greater than the distance from the inner side wall of the second magnet 503 to the magnetic isolation sleeve 401, so that the longitudinal section of the permanent magnet is T-shaped, as shown in FIG. Figure 8 and Figure 9As shown, two steps are formed on the upper and lower sides of the second magnet 503, forming a space for the installation of the magnetic ring 505. The magnetic ring 505 prevents magnetic flux leakage from the permanent magnet's pole edges and compresses the divergent portion of the permanent magnet's main magnetic flux at the pole edges of the magnetic ring 505, thereby achieving a magnetic concentration effect. The magnetic ring 505 guides the magnetic energy accumulated at the pole edges of the permanent magnet, preventing a significant increase in the magnetic field intensity at the pole edges. This makes the overall performance of the magnetic circuit more stable, further improves the effective magnetic flux, and enhances the magnetic energy utilization rate. When the valve core 104 closes the valve seat 2 and maintains the valve closed, only a small current needs to be passed through the electromagnetic coil 400, significantly reducing power consumption and heat generation, further extending the service life of the rigid valve. Moreover, when the rigid valve needs to be opened, due to its high magnetic energy utilization rate and high residual magnetism, the residual magnetic force can effectively offset the force of the moving iron core 402 moving away from the valve seat 2, thereby reducing the impact sound between the valve core 104 and the inner stop iron 105 of the valve body and reducing noise.

[0056] Furthermore, in the above embodiment, the inner wall of the magnetic base 500 is circumferentially provided with at least one mounting groove 501 extending through both end surfaces of the magnetic base 500, and the permanent magnet is connected within the mounting groove 501. Two magnetic rings 505 are circumferentially arranged along the magnetic isolation sleeve 401. The outer walls of the two magnetic rings 505 respectively mate with the inner walls of the first magnet 502 and the third magnet 504. A gap exists between the inner walls of the two magnetic rings 505 and the outer wall of the magnetic isolation sleeve 401, and the inner walls are flush with the inner wall of the second magnet 503. This arrangement facilitates the assembly and installation of the magnetic assembly 5.

[0057] Specifically in this embodiment, Figure 5 、 Figure 6 and Figure 7 As shown, two mounting grooves 501 are provided on the inner wall of the magnetic base 500 along the circumferential direction. The two mounting grooves 501 are symmetrically arranged about the center along the circumference of the magnetic base 500, and a permanent magnet is connected to each mounting groove 501. This arrangement makes the magnetic field generated by the magnetic conductive component 5 on the outside of the magnetic isolation sleeve 401 more uniform, effectively improving the magnetic flux.

[0058] In some embodiments, as Figure 6 、 Figure 7 and Figure 9 As shown, two permanent magnets are circumferentially arranged in each mounting slot 501, and a separation gap 506 is provided between the two permanent magnets. This arrangement facilitates the installation of the two permanent magnets and avoids interference during installation.

[0059] In some embodiments, in order to facilitate the installation of the magnetic component 5 and improve the structural stability of the installation, the magnetic component 5 is located at the end of the electromagnetic coil 400 away from the valve core 104 and is against the end face of the electromagnetic coil 400, and the end of the magnetic component 5 away from the valve seat 2 is against the inner end of the electrical connection seat 3 for limiting.

[0060] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0061] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0062] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A stiffness valve, characterized in that: include A valve body and a valve seat, wherein the valve body includes a valve core and an electromagnetic drive mechanism for driving the valve core to axially move to open or close the valve seat, wherein the electromagnetic drive mechanism includes an electromagnetic coil, a magnetic isolation sleeve, and a movable iron core that slides in the magnetic isolation sleeve and is connected to the valve core; A magnetic conductive assembly, comprising a magnetic conductive seat sleeved on the magnetic isolation sleeve, the magnetic conductive seat being circumferentially connected to at least one permanent magnet, each of the permanent magnets comprising a first magnet, a second magnet, and a third magnet distributed along the axial direction, the first magnet being magnetized in an outward-inward direction and inclined away from the second magnet, the second magnet being magnetized in an outward-inward direction and radially arranged, and the third magnet being magnetized in a mirror-symmetrical direction relative to the second magnet; and The longitudinal section of the permanent magnet is T-shaped so that an accommodation space is formed between the first magnet and the third magnet and the magnetic isolation sleeve respectively, and a magnetic conductive ring is connected in each of the accommodation spaces.

2. The stiffness valve according to claim 1, characterized in that: The first magnet, the second magnet and the third magnet are all arc-shaped blocks extending circumferentially along the magnetic base, and the distance from the inner side wall of the first magnet and the third magnet to the magnetic isolation sleeve is greater than the distance from the inner side wall of the second magnet to the magnetic isolation sleeve.

3. The stiffness valve according to claim 2, characterized in that: The inner wall of the magnetic base is circumferentially provided with at least one mounting groove which passes through the two end surfaces of the magnetic base, and the permanent magnet is connected in the mounting groove; the two magnetic rings are circumferentially extended along the magnetic isolation sleeve, and the outer side walls of the two magnetic rings are respectively fitted with the inner side walls of the first magnet and the third magnet, and there is a gap between the inner side walls of the two magnetic rings and the outer side walls of the magnetic isolation sleeve and they are flush with the inner side wall of the second magnet.

4. The stiffness valve according to claim 3, characterized in that: Two permanent magnets are arranged in each installation slot along the circumferential direction, and a separation gap is provided between the two permanent magnets.

5. The stiffness valve according to claim 3, characterized in that: The magnetic conductive seat is provided with two mounting grooves symmetrically about the center of the magnetic isolation sleeve along the circumferential direction.

6. The stiffness valve according to any one of claims 1 to 5, characterized in that: The magnetic conductive component is located at an end of the electromagnetic coil away from the valve core and abuts against an end surface of the electromagnetic coil.

7. The stiffness valve according to claim 1, characterized in that: The valve body includes a valve housing and a valve stem and a stop iron connected to the valve housing. The stop iron has a center hole. The valve stem is loosely fitted in the center hole, and one end of the valve stem is connected to the moving iron core, and the other end of the valve stem is connected to the valve core; the end of the valve housing away from the valve seat is connected to an electrical connection seat electrically connected to the electromagnetic drive mechanism, and the inner end of the electrical connection seat is against the magnetic conductive component.

8. The stiffness valve according to claim 7, characterized in that: An accommodating cavity coaxial with the center hole is provided on the end surface of the stop iron close to the valve seat, and the valve core is at least partially accommodated in the accommodating cavity; the end of the valve core close to the stop iron is connected to a shock-absorbing seat convex axially outward, and the free end of the valve core is connected to a sealing body that is sealed against the valve port of the valve seat.

9. The stiffness valve according to claim 7, characterized in that: A first mounting hole coaxial with the center hole is provided on the end surface of the stop iron close to one end of the moving iron core, and a second mounting hole coaxial with the center hole is provided on the end surface of the moving iron core close to the stop iron. An elastic member is provided between the moving iron core and the stop iron, and one end of the elastic member is connected to the first mounting hole and the other end of the elastic member is connected to the second mounting hole.

10. The stiffness valve according to claim 8, characterized in that: An annular connecting groove is provided on the inner peripheral wall of the accommodating cavity, an annular sealing member is connected to the annular connecting groove, and a sealing surface is provided on the side of the annular sealing member close to the accommodating cavity, which is sealed to the outer side wall of the valve core and extends axially along the valve core.

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