Magnetic mechanical anti-leakage water inlet valve

Abstract

The utility model relates to a kind of magnetically controlled mechanical type leakage prevention water inlet valve, including valve body, the inside of water flow passage is equipped with valve core body, first magnet is equipped on valve core body, and valve core body is displaced when blocking water flow passage;The inside of valve body is equipped with valve body chamber not intercommunicating with water flow passage, the inside of valve body chamber is equipped with second magnet repelling with first magnet magnetism, and the magnetic force of second magnet is used to limit valve core body at set position, the inside of valve body chamber is also equipped with the expansion piece of water absorption expansion, and magnet limit piece that limit first magnet is equipped on expansion piece;The utility model it is kept valve core opening by setting repelling first magnet and second magnet, and using expansion piece displacement triggered by leakage to remove the limit of second magnet or make it overturn, to close valve core by the aid of magnetic attraction or hydraulic drive, realized no dynamic seal, non-contact trigger, key component dry area protection Pure mechanical type high-reliability leakage prevention.

Description

Technical Field

[0001] This utility model relates to the field of water inlet valve technology, specifically to a magnetically controlled mechanical leak-proof water inlet valve. Background Technology

[0002] Mechanical leak-protection inlet valves are safety devices installed in the water inlet pipes of household appliances such as washing machines and dishwashers. Their core component is an expansion block made of special materials such as wood pulp cotton. Upon contact with water, it rapidly expands, pushing the internal mechanical structure within seconds to automatically close the central pipe valve, quickly cutting off the water supply. This design effectively prevents continuous leaks caused by pipe ruptures, loose connections, or equipment malfunctions, avoiding unexpected water leaks in the home and providing a reliable automatic safety barrier for household water use.

[0003] The authorization announcement number CN103032614B discloses an expansion component for a leak-proof water inlet pipe assembly. According to its specification and drawings, after the central pressure pipe at the pressure hose ruptures, water enters the inner cavity of the corrugated pipe through the crack in the pressure hose, and then enters the cavity. The water is then absorbed by the expansion component. When the expansion rate of the compressed non-woven fabric reaches twice the normal value, it can push the expansion block mounting box to move along the linear guide post of the expansion block mounting base, thereby pushing the valve stem and causing the valve to close the central pressure pipe.

[0004] However, this design also has certain limitations: 1. The seal between the valve stem and the housing is the only dynamic sealing point in the entire inlet valve besides the static seal; its reliability directly determines the sealing performance of the interlayer space. Once the seal at the valve stem installation point fails due to material aging, installation defects, or accidental damage, the leaking water will cause the expansion element to expand incorrectly, leading to accidental closure; 2. In this design, the spring is located inside the central pressure pipeline. Even if the spring is made of stainless steel, it is still at risk of corrosion and stress corrosion cracking under long-term immersion in complex water conditions, leading to spring breakage or loss of elasticity, ultimately causing the valve to accidentally close the central pressure pipeline; 3. The expansion element to the valve is a straight push rod; the increased friction between the expansion element and the housing wall, the mounting box and the guide post, and the valve stem and the sealing ring due to scale, impurities, or slight deformation will directly consume the thrust of the expansion element, which may lead to slow, incomplete, or even failed closing action. Summary of the Invention

[0005] This invention addresses the aforementioned problems of mechanical inlet valves by proposing a magnetically controlled mechanical leak-proof inlet valve. By using magnetic attraction or hydraulic power to drive the valve core to close, it achieves highly reliable leak prevention through a purely mechanical system with no dynamic sealing, non-contact triggering, and key components located in a dry area.

[0006] The objective of this invention is achieved through the following technical solution: a magnetically controlled mechanical leak-proof water inlet valve, comprising a valve body, a water flow channel disposed inside the valve body, a valve core body disposed inside the water flow channel, a first magnet disposed on the valve core body, the valve core body being able to block the water flow channel when it moves with the direction of water flow; a valve body chamber disposed inside the valve body, which is not connected to the water flow channel, the opening of the valve body chamber and the outlet of the water flow channel being connected to an external pipeline, a second magnet disposed inside the valve body chamber, which is magnetically repulsive to the first magnet, the repulsive magnetic force of the second magnet being used to limit the valve core body to a set position, an expansion member disposed inside the valve body chamber, the expansion member being provided with a magnet limiting member that limits the second magnet, the volume change of the expansion member causing the position of the magnet limiting member to change, the position change of the magnet limiting member causing the second magnet to no longer generate a magnetic repulsive force on the first magnet.

[0007] Preferably, the valve body chamber is further provided with a recessed groove, and the magnet limiting member is further provided with an annular limiting groove. The annular limiting groove is provided with a first abutment plate. The annular limiting groove can press the second magnet into the recessed groove and the first abutment plate abuts against one end of the second magnet. The positional movement of the magnet limiting member is used to release the pressing of the annular limiting groove on the second magnet.

[0008] Preferably, the valve body chamber is further provided with a recessed groove, and the magnet limiting member is further provided with an annular limiting groove. The annular limiting groove is further provided with a plurality of locking clamps and a second abutment plate. The outer wall of the locking clamp and the end of the second abutment plate are attached to the interior of the recessed groove. The second magnet is installed inside the adjacent locking clamp and the second abutment plate abuts against one end of the second magnet. The movement of the position of the magnet limiting member simultaneously drives the second magnet inside the locking clamp to move.

[0009] Preferably, the valve body chamber is further provided with an installation box, the installation box is provided with an expansion member, and the magnetic limiting member is slidably disposed on the outer side wall of the installation box; an elastic member with elasticity is also provided between the installation box and the magnetic limiting member, and the installation box is provided with a leakage water inlet communicating with the interior of the valve body chamber.

[0010] Preferably, the elastic element is a spring, and the magnetic limiting element is also provided with a sliding outer shell; the mounting box is integrally extended with a spring support plate, the sliding outer shell is provided with a relief groove to avoid the spring support plate, the sliding outer shell can slide on the mounting box, the surface of the sliding outer shell is also provided with a spring limiting ring, the spring is stuck between the spring limiting ring and the spring support plate, and the interior of the sliding outer shell is in contact with the surface of the expansion element.

[0011] Preferably, the valve body includes a valve body main body and a valve body outer shell installed on one side of the valve body main body. The area between the valve body main body and the valve body outer shell is the valve body chamber. The recessed groove is provided on the outer surface of the valve body main body, and the water flow channel is provided inside the valve body main body. The valve body main body is also provided with several snap-fit ​​grooves, and the mounting box is provided with snap-fit ​​posts that can be snapped into the snap-fit ​​grooves.

[0012] Preferably, the valve body housing is also provided with a viewing window, and an observation lens is provided inside the valve body housing and located inside the viewing window. The observation lens and the mounting box are made of transparent plastic. The valve body housing is connected to an external bellows, and the outlet of the water flow channel is connected to an external pressure hose. The viewing window and observation lens on the valve body shell in this design allow maintenance personnel to directly observe the position and status of key components such as the magnetic limiter and mounting box inside the valve body chamber without disassembling the valve body. This allows them to quickly determine whether the valve has been triggered, facilitating fault diagnosis and maintenance.

[0013] Preferably, the interior of the water flow channel includes a first flow channel, a second flow channel, and a third flow channel arranged in descending order of diameter. The interior of the first flow channel is provided with a water guide cover, which includes a first ring and a second ring. There is a water passage gap between the first ring and the second ring, and a supporting rib is provided at the connection between the first ring and the second ring. The diameter of the first ring is larger than that of the second ring. The interior of the first flow channel has several guide protrusions, and the sidewall of the first ring abuts against the guide protrusions. The interior of the second ring is provided with a slidable valve core body, and the diameter of the sealing ring on the valve core body is larger than that of the second flow channel. The structure of the water guide cover, its first ring, second ring, water passage gap, and supporting ribs can guide and distribute the incoming water flow, reducing turbulence; it can also provide a precise sliding guide cavity for the valve core body through the second ring; the first ring is positioned in the first flow channel by the guide protrusion, ensuring the stability of the entire water guide cover and guaranteeing the stable movement of the subsequent valve core body.

[0014] Preferably, the valve core body includes a valve core support column, a central limiting column, side wall limiting plates, and a sealing ring. The sealing ring is fitted onto the surface of the valve core support column. Several side wall limiting plates and a central limiting column are provided on the valve core support column near the second flow channel. The center of the first magnet is engaged with the central limiting column, and the side wall of the first magnet is attached to the inner wall of the side wall limiting plate. The interior of the second ring body is also provided with a conical protrusion, and the valve core support column is provided with a conical groove adapted to the conical protrusion. In this design, the tapered groove at the bottom of the valve core support column and the tapered protrusion in the second ring of the water guide cover not only provide a stable axial support point during normal water flow, but also play a good radial centering guiding role during the movement and closing of the valve core body, ensuring that the sealing ring can accurately and evenly press the sealing surface, thus improving the reliability and sealing of the closing action.

[0015] Preferably, the material of the expansion component is wood pulp cotton, compressed cotton, degreased cotton, compressed nonwoven fabric, sponge, or superabsorbent resin; this setting has a clear range of material selection, these materials all have the common property of water absorption and expansion, and are easy to obtain, resulting in a lower overall product production cost.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This solution completely eliminates the valve stem that penetrates the valve body. The valve core body, located inside the water flow channel, is controlled by a magnetic field due to the installation of a first magnet. It interacts with the second magnet, magnet limiting component, expansion component, and other components located within the valve body cavity through non-contact magnetic field forces. Furthermore, the water flow channel is physically isolated from the valve body cavity. This fundamentally eliminates the vulnerable dynamic sealing point of the valve stem, ensuring that the sensing area for the leakage trigger signal is completely independent of the water path within the valve body. Only when an external pipeline actually ruptures and water enters the valve body cavity will the magnet limiting component be triggered to change the magnetic force between the second and first magnets, greatly improving the reliability of preventing false triggering and extending the overall product lifespan. 2. In this design, when the inlet valve is not leaking, the magnetic repulsion between the first and second magnets, combined with the support of the conical protrusion on the water guide cover, stably maintains the valve core body in the open position; at this time, the expansion component does not generate any force. Only when leaked water passes through the valve body chamber and is absorbed by the expansion component, the thrust generated by the expansion component only needs to overcome the elastic component to push the position of the magnet limiting component to change, thereby changing the magnetic force between the second and first magnets; in this process, the expansion component does not need to pull or push extra parts, greatly reducing the risk of action failure caused by mechanical friction, and also reducing the performance requirements of the expansion component, improving the overall reliability and responsiveness of the system; 3. Due to the aforementioned ingenious triggering design, the elastic element, expansion element, and second magnet are arranged in a valve body chamber isolated from the main water channel. The most important elastic element only provides preload to the magnet limiting element under normal conditions through the spring support plate and spring limiting ring. This keeps the elastic element in a non-water flow environment for a long time, avoiding water flow corrosion and scale deposition, and significantly improving the long-term stability and lifespan of the elastic element. 4. This solution provides two innovative control structures: In the first embodiment, when leakage occurs, the magnetic limiting component slides out of the limiting position on the second magnet. Under the action of magnetic force, the second magnet flips, causing its magnetic pole relationship with the first magnet to change from repulsion to attraction. This generates a strong active magnetic attraction force, quickly pulling the valve core body to the closed position. This achieves the valve core body actively closing the water flow channel, completely independent of the water pressure in the water flow channel, enabling rapid and decisive active closure. Moreover, it has self-locking properties after closure, strong anti-interference ability, requires no manual intervention, and has extremely high safety. The second embodiment provides another simplified implementation method. During the displacement of the magnetic limiting component, the second magnet is simultaneously moved away, thereby eliminating the repulsive force of the second magnet on the first magnet. With the help of the water flow inside the water flow channel, the valve core body closes the water flow channel, which is equally reliable and rapid under normal water pressure in the water flow channel. 5. When the water flow rate in the water channel increases abnormally, causing the water pressure to exceed the preset threshold (e.g., the pressure corresponding to 20L / min), the water pressure impact force acting on the valve core body is sufficient to overcome the magnetic repulsion force, thus pushing the valve core body to block the second flow channel. The entire inlet valve can not only cope with water leakage caused by the rupture of the pressure hose, but also actively cut off the water circuit when the water supply system pressure rises abnormally, preventing damage or rupture of the pressure hose, washing machine inlet pipe, or other pipes due to excessive water pressure impact, as well as the risk of secondary leakage caused by this. At the same time, this overpressure protection function is a purely mechanical, passive protection that does not require any electronic control components or additional sensors, thus having the advantages of rapid response, reliable operation, and low failure rate. Attached Figure Description

[0017] Figure 1 These are perspective views of the first and second embodiments of this utility model; Figure 2 This is a partial cross-sectional view of the first embodiment of the present invention; Figure 3 The first embodiment of this utility model is in Figure 2 Enlarged view of region A in the image; Figure 4 This is a perspective view of the magnet limiting component according to the first embodiment of this utility model; Figure 5 This is a perspective view of the valve body body of the first embodiment of this utility model; Figure 6 This is a partial cross-sectional view of the second embodiment of the present invention; Figure 7 This is the second embodiment of the present utility model. Figure 6 Enlarged view of region B in the image; Figure 8 This is a perspective view of the magnet limiting member according to the second embodiment of the present utility model; Figure 9This is a perspective view of the valve body body of the second embodiment of this utility model; Figure 10 These are cross-sectional views of the first and second embodiments of this utility model; Figure 11 These are partial exploded views of the first and second embodiments of this utility model; Figure 12 These are partial cross-sectional views of the first and second embodiments of this utility model; Figure 13 This is a perspective view of the mounting box in the first and second embodiments of this utility model.

[0018] Markings in the diagram: 1. Valve body; 10. Valve chamber; 11. Water flow channel; 111. First flow channel; 112. Second flow channel; 113. Third flow channel; 114. Guide protrusion; 12. Valve body; 121. Recessed groove; 122. Snap-fit ​​groove; 13. Valve shell; 130. Box limiting plate; 131. Observation lens; 2. Valve core body; 21. Valve core support column; 211. Conical groove; 22. Central limiting column; 23. Side wall limiting plate; 24. Sealing ring; 3. First magnet 4. Iron; 5. Second magnet; 6. Expansion piece; 7. Magnet limiting piece; 8. Annular limiting groove; 9. First abutment plate; 10. Locking clamp; 11. Second abutment plate; 12. Sliding outer shell; 13. Clearance groove; 14. Spring limiting ring; 15. Elastic piece; 26. Mounting box; 37. Leakage water inlet; 48. Spring support plate; 59. Snap-on column; 20. Water guide cover; 21. First ring; 22. Second ring; 33. Conical protrusion; 44. Support rib; 55. Water passage gap. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: like Figure 1 and Figure 2 As shown, a magnetically controlled mechanical leak-proof water inlet valve, in its first embodiment, includes a valve body 1 and a water flow channel 11 disposed inside the valve body 1. The valve body 1 includes a valve body main body 12 and a valve body outer shell 13 installed on one side of the valve body main body 12. The area between the valve body main body 12 and the valve body outer shell 13 is a valve body chamber 10. The opening of the valve body chamber 10 and the outlet of the water flow channel 11 are both connected to external pipelines.

[0020] During implementation, the valve body shell 13 is connected to the bellows, and the outlet of the water flow channel 11 is connected to the pressure hose. The pressure hose is mainly used to transport water from an external water source through the water flow channel 11 to the water inlet of appliances such as washing machines. The pressure hose is usually made of multiple layers of PVC material and can withstand a certain water pressure. The bellows is used to absorb the vibration and displacement generated during the washing machine's spin cycle, reducing the risk of pipe fatigue rupture. In the event of a leak in the pressure hose, the water is directed to the expansion element 5.

[0021] Please continue to refer to the reference. Figure 11 In the first embodiment, the interior of the water flow channel 11 includes a first flow channel 111, a second flow channel 112, and a third flow channel 113 arranged in descending order of diameter. The interior of the first flow channel 111 is provided with a water guide cover 8, which includes a first ring body 81 and a second ring body 82. There is a water passage gap 84 between the first ring body 81 and the second ring body 82, and a supporting rib 83 is provided at the connection between the first ring body 81 and the second ring body 82. The diameter of the first ring body 81 is larger than that of the second ring body 82. The interior of the first flow channel 111 has several guide protrusions 114, and the sidewall of the first ring body 81 abuts against the guide protrusions 114. The interior of the second ring body 82 is provided with a slidable valve core body 2, and the diameter of the sealing ring 24 on the valve core body 2 is larger than that of the second flow channel 112.

[0022] During implementation, when the sealing ring 24 on the valve core body 2 is not fitted into the interior of the second flow channel 112, the interior of the water flow channel 11 is in a conductive state. At this time, the water from the external water source enters through the inlet of the valve body 12. The incoming water passes through the water passage gap 84 and the outside of the valve core body 2, thus flowing into the interior of the first flow channel 111. The water in the first flow channel 111 continues to flow into the interiors of the second flow channel 112 and the third flow channel 113.

[0023] Please continue to refer to the reference. Figure 2 and Figure 3 In the first embodiment, the water flow channel 11 is provided with a valve core body 2 inside, and a first magnet 3 is provided on the valve core body 2; the valve body 1 is provided with a valve body chamber 10 inside, which is not connected to the water flow channel 11, and a second magnet 4 is provided inside the valve body chamber 10, which is magnetically repelled by the first magnet 3. The magnetic force of the second magnet 4 is used to limit the valve core body 2 to a set position. The valve body chamber 10 is also provided with an expansion member 5 that absorbs water and expands, and a magnet limiting member 6 that limits the second magnet 4 is provided on the expansion member 5.

[0024] During implementation, the materials of the expansion member 5 include, but are not limited to: wood pulp cotton, compressed cotton, compressed non-woven fabric, degreased cotton, sponge, or superabsorbent resin; these materials all expand after absorbing water, generating a certain physical thrust. When the water flow channel 11 or pressure hose ruptures, water directly enters the valve body chamber 10 through the crack between the valve body shell 13 and the pipeline, and is then absorbed by the expansion member 5; the thrust generated by the volume change of the expansion member 5 can push the magnet limiting member 6, causing the position of the magnet limiting member to change, and the position change of the magnet limiting member 6 is used to simultaneously drive the position change of the second magnet 4.

[0025] Please continue to refer to the reference. Figure 3 , Figure 4 and Figure 5 In the first embodiment, the valve body chamber 10 is further provided with a recessed groove 121. Specifically, the recessed groove 121 is located at the center of the outer side of the valve body 12; the water flow channel 11 passes through the valve body 12. The magnet limiting member 6 is also provided with an annular limiting groove 61, and the annular limiting groove 61 is provided with a first abutment plate 62 inside.

[0026] During implementation, with Figure 3 For reference, when the magnet limiting member 6 is in the set position, the annular limiting groove 61 can press the second magnet 4 into the interior of the recessed groove 121, and the first abutment plate 62 abuts against one end of the second magnet 4. The expansion member 5 absorbs the leaked water until the thrust generated by the volume change can push the position of the magnet limiting member 6 to change. After the magnet limiting member 6 slides upward, the magnet limiting member 6 can release the pressing of the annular limiting groove 61 on the second magnet 4.

[0027] At this point, because the magnetic pole of the second magnet 4 near the valve core body 2 in its initial position is the same as the magnetic pole of the first magnet 3 near the recess 121, the second magnet 4 will generate a repulsive magnetic field force on the first magnet 3. However, when the second magnet 4 loses the clamping force of the magnet limiting member 6, the second magnet 4 will flip under the influence of the reaction force of the repulsive magnetic force of the first magnet 3. After the second magnet 4 flips, it will attract the opposite magnetic poles of the first magnet 3. After the first magnet 3 on the valve core body 2 is attracted by the magnetic force, the valve core body 2 will move towards the interior of the second flow channel 112 until the sealing ring 24 on the valve core body 2 can deform and block the second flow channel 112, ultimately blocking the entire water flow channel 11; thus achieving a purely mechanical closure of the water circuit in case of leakage.

[0028] In the first embodiment, to further ensure that the external piping remains leak-free, the magnetic stop 6 is always in the set position. Please refer to the reference. Figure 3 , Figure 10 as well as Figure 12The valve body chamber 10 is further provided with an installation box 7. The valve body main body 12 is also provided with several snap-fit ​​grooves 122. The installation box 7 is provided with snap-fit ​​posts 73 that can be snapped into the snap-fit ​​grooves 122. The installation box 7 is provided with an expansion member 5. The magnetic limiting member 6 is slidably disposed on the outer wall of the installation box 7. An elastic member 70 with elasticity is also provided between the installation box 7 and the magnetic limiting member 6. The installation box 7 is provided with a leakage water inlet 71 that communicates with the inside of the valve body chamber 10. The valve body outer shell 13 is provided with several box limiting plates 130 that abut against the side wall of the spring support plate 72.

[0029] Specifically, the mounting box 7 is positioned after being secured in the snap-fit ​​groove 122 by the snap-fit ​​post 73. Subsequently, after the valve body body 12 and valve body shell 13 are locked together using snaps or screws, the box limiting plate 130 inside the valve body shell 13 can firmly abut against the side wall of the spring support plate 72. Since the spring support plate 72 and the mounting box 7 are an integral design, the box limiting plate 130 firmly presses the mounting box 7 into the set position.

[0030] In the first embodiment, the elastic element 70 is a spring, and the magnetic limiting element 6 is also provided with a sliding outer shell 65; the mounting box 7 is integrally extended with a spring support plate 72, the sliding outer shell 65 is provided with a relief groove 651 to avoid the spring support plate 72, the sliding outer shell 65 is slidably covered on the mounting box 7, the surface of the sliding outer shell 65 is also provided with a spring limiting ring 652, the spring is stuck between the spring limiting ring 652 and the spring support plate 72, and the interior of the sliding outer shell 65 is in contact with the surface of the expansion element 5.

[0031] With this configuration, the elastic element 70 is always inside the valve body chamber 10. Since there is no water inside the valve body chamber 10 when there is no leakage, the elastic element 70 will never be corroded by water and can be kept in the best working condition for a long time.

[0032] Still with Figure 3For reference purposes, during implementation, when the water flow channel 11 or bellows ruptures, water directly enters the valve body chamber 10 through the crack between the valve body shell 13 and the pipeline. Since the valve body chamber 10 is connected to the leakage water inlet 71, the leaked water will enter the interior of the mounting box 7 through the leakage water inlet 71; the expansion member 5 inside the mounting box 7 will expand after absorbing water. The thrust generated by the expansion acts on the interior of the sliding shell 65, causing the sliding shell 65 on the magnet limiting member 6 to slide upwards on the outer wall of the mounting box 7; the position of the magnet limiting member 6 also changes simultaneously. During the sliding of the magnet limiting member 6, the top of the sliding shell 65 will compress the elastic member 70, causing deformation, thus the elastic member 70 also loses its limiting effect on the magnet limiting member 6; the magnet limiting member 6 then releases its downward limiting effect on the second magnet 4.

[0033] Please continue to refer to this. Figure 2 In the first embodiment, the valve core body 2 includes a valve core support column 21, a central limiting column 22, a side wall limiting plate 23, and a sealing ring 24. The surface of the valve core support column 21 is fitted with a sealing ring 24. Several side wall limiting plates 23 and a central limiting column 22 are provided on the valve core support column 21 near the second flow channel 112. The center of the first magnet 3 is stuck on the central limiting column 22, and the side wall of the first magnet 3 is attached to the inner wall of the side wall limiting plate 23. The interior of the second ring body 82 is also provided with a conical protrusion 821, and the valve core support column 21 is provided with a conical groove 211 adapted to the conical protrusion 821.

[0034] With this configuration, the first magnet 3 is fixedly fastened to several side wall limiting plates 23 and the central limiting post 22. When the first magnet 3 is attracted by magnetic force, it can drive the entire valve core body 2 to move simultaneously. When the first magnet 3 is repelled by the magnetic force of the second magnet 4, the conical groove 211 on the valve core body 2 always abuts against the conical protrusion 821; thus, the conical protrusion 821 inside the second ring 82 plays a supporting and guiding role for the valve core body 2.

[0035] It should be noted that the valve body housing 13 is also provided with a viewing window, and an observation lens 131 is disposed inside the valve body housing 13 and located inside the viewing window. The observation lens 131 and the mounting box 7 are made of transparent plastic. This arrangement is used to observe the status of various components inside the valve body chamber 10 during maintenance. For example, to check whether the expansion member 5, the magnetic limiting member 6, and the elastic member 70 inside the mounting box 7 are in normal condition.

[0036] Please refer to Figures 6 to 9This is the second embodiment of the present invention. Unlike the first embodiment, the specific structure of the magnet limiting member 6 has been modified. Specifically, the magnet limiting member 6 is further provided with an annular limiting groove 61. The annular limiting groove 61 contains several locking clamps 63 and a second abutment plate 64. The outer walls of the locking clamps 63 and the ends of the second abutment plates 64 are fitted into the interior of the recessed groove 121. The second magnet 4 is installed inside an adjacent locking clamp 63, and the second abutment plate 64 abuts against one end of the second magnet 4.

[0037] Please refer to Figure 7 In the second embodiment, leaked water enters the interior of the mounting box 7 through the leak water inlet 71. The expansion member 5 inside the mounting box 7 expands after absorbing water. The thrust generated by the expansion acts on the interior of the sliding outer shell 65, causing the sliding outer shell 65 on the magnet limiting member 6 to slide upward on the outer wall of the mounting box 7. During the sliding process of the magnet limiting member 6, the top of the sliding outer shell 65 will compress the elastic member 70 and deform. Finally, the position of the magnet limiting member 6 also changes simultaneously.

[0038] In the second embodiment, it should be noted that the movement of the magnet limiting member 6 simultaneously moves the second magnet 4 inside the locking clamp 63. During this process, the second magnet 4 gradually moves away from the first magnet 3, thereby ultimately releasing the magnetic repulsion between the first magnet 3 and the second magnet 4. When the first magnet 3 on the valve core body 2 is not subjected to magnetic repulsion, the valve core body 2 will shift with the direction of water flow until the sealing ring 24 on the valve core body 2 can deform and block the second flow channel 112, ultimately blocking the entire water flow channel 11; thus achieving a purely mechanical closure of the water circuit in case of leakage.

[0039] Working principle and usage of this utility model: Under normal conditions without leakage, the second magnet 4 installed in the valve body chamber 10 has the same magnetic pole near the water flow channel 11 as the first magnet 3 fixed on the valve core body 2, generating a magnetic repulsion force. This repulsion force is transmitted through the valve core body 2, causing the sealing ring 24 on the valve core body 2 to move away from the sealing surface of the second flow channel 112. At the same time, the conical groove 211 of the valve core body 2 abuts against the conical protrusion 821 of the water guide cover 8, obtaining stable support and guidance. At this time, the water flow channel 11 is unobstructed.

[0040] External water enters from the inlet of the valve body 12, flows through the water passage gap 84 of the guide cover 8, the space between the outer side of the valve core body 2 and the inner wall of the second ring body 82, then enters the first flow channel 111, then through the second flow channel 112 and the third flow channel 113, and finally flows from the outlet to the pressure hose.

[0041] Within the normal operating water pressure range, the valve core 2, thanks to the magnetic repulsion between the first magnet 3 and the second magnet 4, can stably overcome the static and dynamic pressure of the water flow and remain in the set position. However, when the water flow rate in the water flow channel 11 increases abnormally, causing the water pressure to exceed a preset threshold (e.g., the pressure corresponding to 20 L / min), the hydrodynamic force acting on the valve core 2 will increase significantly. When this water pressure impact force is sufficient to overcome the magnetic repulsion between the first magnet 3 and the second magnet 4, it can push the valve core 2 to move towards the second flow channel 112, ultimately causing the sealing ring 24 to block the second flow channel 112 and automatically cut off the water flow; thus preventing high-pressure water from continuously supplying water to the pressure hose, and simultaneously preventing water in the pressure hose from flowing back into the interior of the water flow channel 11.

[0042] When the pressure in the water flow channel 11 returns to the normal working water pressure range, the valve core body 2 is pushed again by the magnetic repulsion between the first magnet 3 and the second magnet 4, which pushes the conical groove 211 of the valve core body 2 to abut against the conical protrusion 821 of the water guide cover 8, thereby obtaining stable support and guidance.

[0043] When the pressure hose connected to the valve body housing 13 ruptures, leaking water will enter the valve body chamber 10 through the crack. The leaking water enters the interior of the mounting housing 7 through the leakage water inlet 71 and is absorbed by the expansion element 5 (such as wood pulp cotton, superabsorbent resin, etc.). The expansion element 5 rapidly absorbs water and expands, generating expansion thrust.

[0044] The expansion thrust of the expansion member 5 acts on the inner wall of the sliding outer shell 65 of the magnet limiting member 6, pushing the magnet limiting member 6 to overcome the elastic force of the elastic member 70 and slide upward along the outer wall of the mounting box 7. This process completes the conversion of the water leakage signal into a mechanical displacement signal.

[0045] For the first embodiment: After the magnet limiting member 6 slides upward, its annular limiting groove 61 and the first abutment plate 62 release their pressure on the second magnet 4. The second magnet 4, which was originally forcibly fixed in the recessed groove 121 and maintained in a specific polarity, flips over under the reaction force of the repulsive force of the first magnet 3.

[0046] After being flipped, the magnetic poles of the second magnet 4 and the first magnet 3 become opposite poles, generating a strong magnetic attraction. This attraction pulls the valve core body 2 and the first magnet 3 rapidly toward the second flow channel 112. The valve core body 2 moves until the sealing ring 24 on it deforms, tightly blocking the second flow channel 112, thereby completely cutting off the water flow channel 11 and achieving active and rapid closure.

[0047] For the second embodiment: When the magnet limiting member 6 slides upward, the locking clamp 63 on it drives the second magnet 4 to move upward as a whole, gradually moving it away from the first magnet 3. As the distance the magnet limiting member 6 slides upward increases, the magnetic repulsion force of the second magnet 4 on the first magnet 3 rapidly weakens to negligible levels.

[0048] After the first magnet 3 on the valve core body 2 loses its magnetic repulsion support, the valve core body 2 is displaced towards the second flow channel 112 under the action of water flow pressure or slight external force, and finally the second flow channel 112 is blocked by the sealing ring 24, thus closing the water circuit.

[0049] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A magnetically controlled mechanical leak-proof water inlet valve, comprising a valve body (1) and a water flow channel (11) disposed inside the valve body (1), characterized in that, The water flow channel (11) is equipped with a valve core body (2), and a first magnet (3) is provided on the valve core body (2). When the valve core body (2) is displaced with the direction of water flow, it can block the water flow channel (11). The valve body (1) is equipped with a valve body chamber (10) that is not connected to the water flow channel (11). The opening of the valve body chamber (10) and the outlet of the water flow channel (11) are both connected to external pipelines. The valve body chamber (10) is equipped with a first magnet (3) inside. The second magnet (4) is magnetically repulsive. The magnetic force of the second magnet (4) restricts the valve core body (2) to a set position. The valve body chamber (10) is also provided with an expansion member (5) that absorbs water and expands. The expansion member (5) is provided with a magnet limiting member (6) that limits the second magnet (4). The volume change of the expansion member (5) drives the position of the magnet limiting member (6) to change. The position change of the magnet limiting member (6) makes the second magnet (4) no longer generate a magnetic repulsive force on the first magnet (3).

2. The magnetically controlled mechanical leak-proof inlet valve according to claim 1, characterized in that, The valve body chamber (10) is further provided with a recessed groove (121), and the magnet limiting member (6) is further provided with an annular limiting groove (61). The annular limiting groove (61) is provided with a first abutting plate (62). The annular limiting groove (61) can press the second magnet (4) into the recessed groove (121) and the first abutting plate (62) abuts against one end of the second magnet (4). The position movement of the magnet limiting member (6) is used to release the pressing of the annular limiting groove (61) on the second magnet (4).

3. The magnetically controlled mechanical leak-proof inlet valve according to claim 1, characterized in that, The valve body chamber (10) is further provided with a recessed groove (121), and the magnet limiting member (6) is further provided with an annular limiting groove (61). The annular limiting groove (61) is further provided with a plurality of locking clamps (63) and a second abutment plate (64). The outer side wall of the locking clamp (63) and the end of the second abutment plate (64) are attached to the interior of the recessed groove (121). The second magnet (4) is installed inside the adjacent locking clamp (63) and the second abutment plate (64) abuts against one end of the second magnet (4). The position movement of the magnet limiting member (6) simultaneously drives the second magnet (4) inside the locking clamp (63) to move.

4. The magnetically controlled mechanical leak-proof inlet valve according to claim 2 or claim 3, characterized in that, The valve body chamber (10) is further provided with an installation box (7), the installation box (7) is provided with an expansion member (5), the magnet limiting member (6) is slidably disposed on the installation box (7); an elastic member (70) with elasticity is provided between the installation box (7) and the magnet limiting member (6), and a leakage water inlet (71) communicating with the inside of the valve body chamber (10) is provided on the installation box (7).

5. The magnetically controlled mechanical leak-proof inlet valve according to claim 4, characterized in that, The elastic element (70) is a spring, and the magnetic limiting element (6) is also provided with a sliding shell (65); the mounting box (7) is integrally extended with a spring support plate (72), the sliding shell (65) is provided with a relief groove (651) to avoid the spring support plate (72), the sliding shell (65) can slide on the mounting box (7), the surface of the sliding shell (65) is also provided with a spring limiting ring (652), the spring is stuck between the spring limiting ring (652) and the spring support plate (72), and the interior of the sliding shell (65) is attached to the surface of the expansion element (5).

6. The magnetically controlled mechanical leak-proof inlet valve according to claim 5, characterized in that, The valve body (1) includes a valve body (12) and a valve body shell (13) installed on one side of the valve body (12). The area between the valve body (12) and the valve body shell (13) is the valve body chamber (10). The recessed groove (121) is provided on the outer surface of the valve body (12), and the water flow channel (11) is provided inside the valve body (12). The valve body (12) is also provided with several snap-fit ​​grooves (122), and the mounting box (7) is provided with snap-fit ​​columns (73) that can be snapped into the snap-fit ​​grooves (122). The valve body shell (13) is provided with several box limiting plates (130) that abut against the side wall of the spring support plate (72).

7. The magnetically controlled mechanical leak-proof inlet valve according to claim 6, characterized in that, The valve body housing (13) is also provided with a viewing window. An observation lens (131) is provided inside the valve body housing (13) and the observation lens (131) is located inside the viewing window. The observation lens (131) and the mounting box (7) are made of transparent plastic. The valve body housing (13) is connected to a bellows, and the outlet of the water flow channel (11) is connected to a pressure hose.

8. The magnetically controlled mechanical leak-proof inlet valve according to claim 1, characterized in that, The interior of the water flow channel (11) includes a first flow channel (111), a second flow channel (112), and a third flow channel (113) arranged in descending order of diameter. The interior of the first flow channel (111) is provided with a water guide cover (8). The water guide cover (8) includes a first ring body (81) and a second ring body (82). There is a water passage gap (84) between the first ring body (81) and the second ring body (82), and a supporting rib (83) is provided at the connection between the first ring body (81) and the second ring body (82). The diameter of the first ring body (81) is larger than that of the second ring body (82). The interior of the first flow channel (111) has several guide protrusions (114). The sidewall of the first ring body (81) abuts against the guide protrusions (114). The interior of the second ring body (82) is provided with a slidable valve core body (2). The diameter of the sealing ring (24) on the valve core body (2) is larger than that of the second flow channel (112).

9. The magnetically controlled mechanical leak-proof inlet valve according to claim 8, characterized in that, The valve core body (2) includes a valve core support column (21), a central limiting column (22), a side wall limiting plate (23), and a sealing ring (24). The surface of the valve core support column (21) is fitted with a sealing ring (24). Several side wall limiting plates (23) and a central limiting column (22) are provided on the valve core support column (21) near the second flow channel (112). The center of the first magnet (3) is stuck on the central limiting column (22), and the side wall of the first magnet (3) is attached to the inner wall of the side wall limiting plate (23). The interior of the second ring body (82) is also provided with a conical protrusion (821), and the valve core support column (21) is provided with a conical groove (211) adapted to the conical protrusion (821).

10. The magnetically controlled mechanical leak-proof inlet valve according to any one of claims 1 to 9, characterized in that, The material of the expansion component (5) is: wood pulp cotton, compressed non-woven fabric, sponge or super absorbent resin.

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