A multi-channel fluid control solenoid valve structure

Abstract

The present invention discloses a multi-channel fluid control solenoid valve structure, which belongs to the technical field of multi-way solenoid valves, and includes a multi-way solenoid valve core, which is composed of a pilot control slide plug, a fluid control slide plug and a fluid control column. The fluid control column is provided with a fluid control unit for detecting the fluid control slide plug's moving smoothness and cleaning the impurities at the blocked position. The present invention uses a fluid impurity cleaning mechanism equipped with a butterfly cleaning impeller to cooperate with a slide plug blocking detection mechanism. When the blocking detection ring is squeezed and contracted by adhered impurities, the limit magnetic ring is driven to contract, and the control of the slide plug blocking detection mechanism is released, so that the butterfly cleaning impeller rotates and moves horizontally, and the sliding path of the fluid control slide plug is cleaned in time. The internal flow medium is cut and cleaned by the rotation of the butterfly cleaning impeller, and when the impurities are difficult to clean, a prompt sound is emitted to remind the maintenance personnel.

Description

Technical Field

[0001] The invention relates to the technical field of multi-way solenoid valves, and in particular to a multi-channel fluid control solenoid valve structure. Background Art

[0002] Solenoid valves are divided into three categories in principle, namely direct-acting solenoid valves, step-by-step direct-acting solenoid valves, and pilot-operated solenoid valves. They play a key role in industrial automation, medical equipment, automotive industry, household appliances, aerospace, and environmental protection engineering. Solenoid valves generally include a valve seat, a valve core, an electromagnetic drive device, and a return spring. The valve seat includes a control chamber, and the valve core is arranged in the middle of the control chamber. The electromagnetic drive device includes an armature and a coil. The movement of the valve core is controlled by controlling the size or on-off of the current on the coil and thereby controlling the displacement of the armature.

[0003] When the solenoid valve is in use, the medium in the control pipeline may contain impurities in the working environment, causing impurities to invade the interior of the solenoid valve, or because the internal parts of the solenoid valve are damaged after long-term use, resulting in poor sealing, allowing impurities to enter the interior of the solenoid valve and contaminate the control chamber of the valve body.

[0004] At present, the cleaning method for impurities inside the solenoid valve is to regularly check the valve body and clean it, that is, when cleaning, disconnect the pipeline, flush the pipeline, clean the material residues and rust impurities contained therein, and set a filter structure at the medium inlet to filter the impurities. However, this cleaning method cannot promptly detect and remove impurities adhered to the inner wall of the solenoid valve, resulting in damage to the movement of the valve core. After the solenoid valve is operated multiple times in this state, internal parts such as springs and pistons are damaged, thereby reducing the control sensitivity and accuracy of the solenoid valve and affecting the normal circulation of the medium pipeline. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that in the prior art, the cleaning method for impurities inside the solenoid valve is to regularly check the valve body and clean it, but such cleaning method cannot timely detect and remove impurities adhered to the inner wall of the solenoid valve, resulting in damage to the movement of the valve core, so that the solenoid valve is operated multiple times in such a state, causing damage to internal parts such as springs and pistons. A multi-channel fluid control solenoid valve structure is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A multi-channel fluid control solenoid valve structure, comprising a multi-way solenoid valve core arranged in a pilot solenoid valve body, the multi-way solenoid valve core is composed of a pilot control slide plug arranged in a pilot control cavity of the pilot solenoid valve body, a fluid control slide plug arranged in a fluid control cavity of the pilot solenoid valve body, and a fluid control column, the fluid control column is provided with a fluid control unit for detecting the fluid control slide plug's moving smoothness and cleaning impurities at the blocked part, the fluid control unit is composed of a slide plug blocking detection mechanism and a fluid impurity cleaning mechanism;

[0008] The slide plug obstruction detection mechanism comprises an obstruction detection ring arranged on the fluid control column, the inner wall of the fluid control column is provided with an obstruction detection bracket, a support spring column is fixed to the outer side of the obstruction detection bracket, a limiting sleeve is fixed to the side of the obstruction detection ring close to the obstruction detection bracket, and a limiting magnetic ring is sleeved on the outer side of the limiting sleeve;

[0009] The fluid impurity cleaning mechanism includes a cleaning sleeve slidably connected to the outer surface of the fluid control column, a butterfly cleaning impeller is fixed to the outer surface of the cleaning sleeve, a cleaning control magnet is arranged on the inner side of the cleaning sleeve, and the cleaning sleeve is magnetically adsorbed with a magnetic control ring through the magnetic force of the cleaning control magnet, and the side surface of the magnetic control ring is magnetically attracted to the limiting magnetic ring.

[0010] Preferably, the blockage detection ring is arranged on the left and right sides of the fluid control slide plug, the fluid control slide plug slides with the inner wall of the fluid control cavity of the pilot solenoid valve body, and the diameter of the blockage detection ring is adapted to the diameter of the fluid control slide plug.

[0011] Preferably, the limiting sleeve is sealingly and slidably connected to the supporting spring column via a compression spring, a plurality of the blocking detection rings are provided, and contraction intervals are provided between the plurality of the blocking detection rings.

[0012] Preferably, a detection cavity is opened on the inner wall of the fluid control column, a side of the limiting magnetic ring close to the blocking detection ring is in contact with the inner wall of the detection cavity, and a permanent magnet is arranged on the side of the limiting magnetic ring.

[0013] Preferably, two butterfly-type cleaning impellers are provided, and flow grooves are provided on the surfaces of the butterfly-type cleaning impellers, and the flow grooves of two adjacent butterfly-type cleaning impellers are alternately arranged.

[0014] Preferably, the butterfly cleaning impeller is provided with fluid inclined blades, and the diameter of the butterfly cleaning impeller is matched with the diameter of the fluid control sliding plug.

[0015] Preferably, a pilot cavity cleaning mechanism is also provided on the pilot control slide plug for cleaning impurities in the pilot control cavity of the pilot solenoid valve body. The pilot cavity cleaning mechanism includes a flushing sleeve arranged on the side of the pilot control slide plug close to the fluid control column. The outer side of the flushing sleeve is provided with a spring limiting assembly arranged in the spring control cavity of the pilot solenoid valve body for limiting the sliding of the fluid control column.

[0016] Preferably, a vortex flushing hole is provided on the inner wall of the flushing sleeve, and a sealing plug for closing the spring control chamber is also provided on the outer side of the multi-way solenoid valve core.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The fluid impurity cleaning mechanism equipped with a butterfly cleaning impeller cooperates with the plug blockage detection mechanism. When the blockage detection ring is squeezed and contracted by the adhered impurities, the limit magnetic ring is driven to contract, and the control of the plug blockage detection mechanism is released, so that the butterfly cleaning impeller rotates and moves laterally, and the sliding path of the fluid control plug is cleaned in time. The internal flow medium is cut and cleared by the rotation of the butterfly cleaning impeller, and when the impurities are difficult to clean, a warning sound is issued to remind the maintenance personnel.

[0019] 2. By using a cleaning sleeve equipped with a butterfly cleaning impeller in conjunction with a magnetic control ring, when the blocking detection ring retracts due to sliding obstruction, the corresponding butterfly cleaning sleeve can be activated to cut and remove impurities at the blocked sliding position, thereby avoiding squeezing of the subsequent fluid control sliding plug, causing wear and reducing the control accuracy of the solenoid valve.

[0020] 3. By setting a flushing sleeve in conjunction with the fluid control column, when the pilot control slide plug is driven by the medium pilot, a corresponding thrust can be generated on the pilot control slide plug on the other side, thereby increasing the thrust on the fluid control column, making it easier for the fluid control column to move to the specified position faster, and when the cleaning liquid flows through the vortex flushing hole, a vortex torrent can be formed to flush the inner wall of the pilot control cavity, thereby avoiding excessive accumulation of impurities due to the slow flow rate of the fluid in the pilot control cavity, thereby reducing the control accuracy of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a multi-way solenoid valve core structure of a multi-channel fluid control solenoid valve structure proposed by the present invention;

[0022] Figure 2 A schematic diagram of a multi-channel solenoid valve core, a flushing sleeve and a spring limiter assembly structure from one perspective of a multi-channel fluid control solenoid valve structure proposed by the present invention;

[0023] Figure 3A schematic diagram of a multi-channel solenoid valve core, a flushing sleeve and a spring limiter assembly structure from a second perspective of a multi-channel fluid control solenoid valve structure proposed by the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of a multi-channel solenoid valve core located in a fluid control chamber in a multi-channel fluid control solenoid valve structure proposed by the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of a multi-channel fluid control solenoid valve structure proposed by the present invention, in which a multi-channel solenoid valve core is located in a pilot control chamber;

[0026] Figure 6 An exploded view of a blockage detection bracket, a cleaning sleeve and a magnetic control ring structure in a multi-channel fluid control solenoid valve structure proposed by the present invention.

[0027] Figure numerals: 1. Multi-way solenoid valve core; 11. Pilot control slide plug; 12. Fluid control slide plug; 13. Fluid control column; 14. Sealing plug; 2. Blockage detection ring; 21. Limit sleeve; 22. Limit magnetic ring; 3. Blockage detection bracket; 31. Support spring column; 32. Compression spring; 4. Cleaning sleeve; 41. Butterfly cleaning impeller; 411. Fluid tilting blades; 42. Magnetic control ring; 5. Flush sleeve; 51. Vortex flushing hole; 6. Spring limit assembly. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Example, see Figures 1 to 6 A multi-channel fluid control solenoid valve structure includes a multi-way solenoid valve core 1 arranged in a pilot solenoid valve body. The multi-way solenoid valve core 1 is composed of a pilot control slide plug 11 arranged in a pilot control cavity of the pilot solenoid valve body, a fluid control slide plug 12 arranged in a fluid control cavity of the pilot solenoid valve body, and a fluid control column 13. A fluid control unit is arranged on the fluid control column 13 for detecting the moving smoothness of the fluid control slide plug 12 and cleaning impurities at the blocked position. The fluid control unit is composed of a slide plug blockage detection mechanism and a fluid impurity cleaning mechanism.

[0032] It should be noted that the solenoid valve used in the present invention is a pilot-operated three-position five-way solenoid valve. When the pilot-operated solenoid valve body is just injected with fluid, the fluid will enter the pilot control cavity through the pilot cavity fluid channel, and then the electromagnet on the corresponding side of the pilot-operated solenoid valve body is turned on according to the flow path required, so that the pilot control slide plug 11 on the corresponding side pushes the fluid control column 13 to move in another direction. This is the pilot control process of the pilot solenoid valve, which will not be repeated in the subsequent description of the pilot fluid control process of the pilot solenoid valve body.

[0033] Based on the above, three cavities are arranged in the pilot solenoid valve body, which are divided into: pilot control chamber, spring control chamber and fluid control chamber in the order from both ends to the center of the multi-way solenoid valve core 1, among which the movable range of the pilot control slide 11 corresponds to the pilot control chamber, the extension and compression space of the spring limit assembly 6 corresponds to the spring control chamber, the sliding range of the fluid control slide 12 and the fluid control column 13 corresponds to the fluid control chamber, and the channels for the sliding of the multi-way solenoid valve core 1 in the three cavities in the pilot-operated three-position five-way solenoid valve are all cylindrical. This is a characteristic of the cavity setting in the existing pilot-operated multi-way solenoid valve, and will not be repeated in the subsequent description of the cavity characteristics of the pilot control chamber, the spring control chamber and the fluid control chamber.

[0034] like Figures 2 to 4As shown, the plug blockage detection mechanism includes a blockage detection ring 2 arranged on the fluid control column 13, the inner wall of the fluid control column 13 is provided with a blockage detection bracket 3, a support spring column 31 is fixed to the outer side of the blockage detection bracket 3, a limiting sleeve 21 is fixed to the side of the blockage detection ring 2 close to the blockage detection bracket 3, and a limiting magnetic ring 22 is sleeved on the outer side of the limiting sleeve 21.

[0035] Furthermore, the blockage detection ring 2 is arranged on the left and right sides of the fluid control slide plug 12, the fluid control slide plug 12 slides with the inner wall of the fluid control cavity of the pilot solenoid valve body, and the diameter of the blockage detection ring 2 is adapted to the diameter of the fluid control slide plug 12, so that when the blockage detection ring 2 retracts, it can be indicated that the impurities adhering to the inner wall of the fluid control cavity have affected the normal sliding of the fluid control slide plug 12;

[0036] The limiting sleeve 21 is sealingly and slidably connected to the supporting spring column 31 through the compression spring 32. A plurality of blocking detection rings 2 are provided, and a contraction interval is provided between the plurality of blocking detection rings 2 to provide a contraction space for the retraction of the blocking detection ring 2.

[0037] It should be noted that: in the fluid control chamber, the fluid control column 13 moves in the corresponding direction through the movement of the pilot control slide 11 in the pilot control chamber, so that the blockage detection ring 2 slides in the cylindrical channel. When there are too many impurities adhering to the inner wall of the cylindrical channel of the fluid control chamber, the blockage detection ring 2 will be blocked, so that it moves in the direction of the fluid control column 13, and drives the limit magnetic ring 22 to move in the axial direction of the fluid control column 13, so that the limit magnetic ring 22 does not contact the magnetic control ring 42, thereby driving the butterfly cleaning impeller 41 to rotate with the flow of the medium inside the valve body. When the adhered impurities are difficult to remove, the butterfly cleaning impeller 41 that no longer rotates cuts the flowing medium and sends a different prompt sound to the outside world, which prompts the maintenance personnel to timely understand the impurity adhesion accumulation in the pilot control chamber, thereby realizing the blockage detection function of whether the impurities adhering to the inner wall of the fluid control chamber hinder the sliding of the fluid control slide 12.

[0038] Further advantages of adopting the above method are: a detection cavity is provided on the inner wall of the fluid control column 13, and the side of the limiting magnetic ring 22 close to the blocking detection ring 2 is in contact with the inner wall of the detection cavity, so as to limit the maximum extension distance of the blocking detection ring 2, and a permanent magnet is arranged on the side of the limiting magnetic ring 22, so as to reduce the obstruction of the magnetic control ring 42 to the limiting magnetic ring 22 when the limiting magnetic ring 22 approaches or moves away from the axis of the fluid control column 13, and release the sliding control of the magnetic control ring 42 when the magnetic attraction parts of the limiting magnetic ring 22 and the magnetic control ring 42 do not correspond, so as to facilitate the subsequent butterfly cleaning impeller 41 to clean the inner wall of the valve body control channel without being affected by the magnetic force of the limiting magnetic ring 22.

[0039] like Figure 4 and Figure 6 As shown, the fluid impurity cleaning mechanism includes a cleaning sleeve 4 slidably connected to the outer surface of the fluid control column 13, a butterfly cleaning impeller 41 is fixed to the outer surface of the cleaning sleeve 4, a cleaning control magnet is arranged on the inner side of the cleaning sleeve 4, and the cleaning sleeve 4 is magnetically adsorbed with a magnetic control ring 42 through the magnetic force of the cleaning control magnet, and the side of the magnetic control ring 42 is magnetically attracted to the limiting magnetic ring 22.

[0040] Furthermore, two butterfly cleaning impellers 41 are provided, and a flow groove is provided on the surface of the butterfly cleaning impeller 41. The flow grooves of the two adjacent butterfly cleaning impellers 41 are arranged alternately. When the medium flows in the pilot solenoid valve body, when passing through the flow groove, it can provide a rotational drive for the butterfly cleaning impeller 41. The driving principle is the rotational thrust generated by the vortex or steering flow of the fluid on the impeller surface. It is a prior art, and when the medium flows horizontally relative to the butterfly cleaning impeller 41, it drives the butterfly cleaning impeller 41 to move in the flow direction of the medium, so that the butterfly cleaning impeller 41 rotates and slides on the fluid control column 13, and can remove and clean the impurities strongly adhered to the sliding path of the fluid control slide plug 12;

[0041] It should be noted that: when the blockage detection ring 2 is blocked by impurities adhering to the sliding path of the fluid control plug 12 and shrinks toward the fluid control column 13, the limit magnetic ring 22 is driven to shrink toward the axial direction of the fluid control column 13, thereby weakening the magnetic attraction of the limit magnetic ring 22 to the magnetic control ring 42, so that the butterfly cleaning impeller 41 can rotate and move laterally with the flow of fluid in the valve body, thereby clearing impurities adhering to the sliding path, and completing the cleaning process of impurities adhering to the control channel in the fluid control cavity of the valve body.

[0042] The further advantage of adopting the above method is that the butterfly cleaning impeller 41 is provided with fluid inclined blades 411, and the fluid inclined blades 411 are pushed by the transversely circulating medium to form corresponding inclined blades, thereby increasing the resistance to the flow of the diverted medium, and the diameter of the butterfly cleaning impeller 41 is adapted to the diameter of the fluid control slide plug 12, so that during the rotation and transverse movement of the butterfly cleaning impeller 41, the obstruction in the sliding direction of the fluid control slide plug 12 can be cleaned, and flow to the outside of the valve body with the flow of the medium, so that the impurities adhered to the inner wall of the valve body can be cleaned in time, avoiding the mutual squeezing of the fluid control slide plug 12 and the adhered impurities, causing wear and affecting the control accuracy of the valve body.

[0043] Based on the above, it is necessary to open the remaining passages in the pilot solenoid valve body to achieve the opposite action. At this time, the medium flows in the opposite direction, which can make the butterfly cleaning impeller 41 that slides to one side of the limit groove on the surface of the fluid control column 13 slide in the opposite direction until it contacts the limit magnetic ring 22 and stops sliding, thereby completing the reset operation of the butterfly cleaning impeller 41;

[0044] like Figure 2 , Figure 3 and Figure 5 As shown, a pilot cavity cleaning mechanism is also provided on the pilot control slide 11 for cleaning impurities in the pilot control cavity of the pilot solenoid valve body. The pilot cavity cleaning mechanism includes a flushing sleeve 5 arranged on the side of the pilot control slide 11 close to the fluid control column 13. A spring limiting assembly 6 arranged in the spring control cavity of the pilot solenoid valve body is sleeved on the outer side of the flushing sleeve 5 for limiting the sliding of the fluid control column 13.

[0045] Furthermore, a vortex flushing hole 51 is provided on the inner wall of the flushing sleeve 5, and a sealing plug 14 for closing the spring control chamber is also provided on the outer side of the multi-way solenoid valve core 1, so that the cleaning liquid will not enter the medium flow space, and the spring control chamber is sealed, so that the cleaning liquid will not enter the spring limit assembly 6 to affect the extension and telescoping of the spring therein;

[0046] It should be noted that: when the electromagnet is used on one side of the pilot solenoid valve body to control the accumulation of medium in the pilot control cavity, a thrust will be generated on the pilot control slide plug 11 on this side, and the flushing sleeve 5 will be driven to overlap with the blockage detection ring 2, thereby reducing the space of the flushing sleeve 5 on this side, and the cleaning liquid outside the flushing sleeve 5 (different from the circulating medium in the valve body) will be squeezed to the other side, and through the vortex flushing hole 51, when the cleaning liquid in the flushing sleeve 5 flows out or enters, a vortex torrent will be formed to flush the inner wall of the pilot control cavity, thereby completing the cleaning process of the inner wall of the pilot control cavity, and avoiding the slow flow of the fluid in the pilot control cavity, which causes impurities to continuously adhere to the inner wall of the pilot control cavity, affecting the precise movement of the pilot control slide plug 11, and making the fluid control column 13 and the fluid control slide plug 12 unable to slide into place, thereby reducing the control accuracy of the multi-way solenoid valve core 1.

[0047] A further advantage of adopting the above method is that when the cleaning liquid in the flushing sleeve 5 on one side enters the flushing sleeve 5 on the other side through the fluid control column 13, the space on the other side where the pilot control slide plug 11 contacts the medium will be enriched, and then the driving force of the pilot control slide plug 11 can be increased by the flowing cleaning liquid, thereby accelerating the driving speed of the fluid control column 13.

[0048] Working principle:

[0049] When the present invention controls the amount of adhering impurities accumulated in the pilot solenoid valve body, it will sequentially perform a process of detecting the impurities adhering to the inner wall of the fluid control chamber, a process of cleaning the impurities adhering to the inner wall of the fluid control chamber, and a process of flushing and cleaning the inner wall of the pilot control chamber. The process of detecting the impurities adhering to the inner wall of the fluid control chamber is as follows: in the fluid control chamber, the fluid control column 13 moves in a corresponding direction by moving the pilot control slide plug 11 in the pilot control chamber, so that the blockage detection ring 2 slides in the cylindrical channel. When there are too many impurities adhering to the inner wall of the cylindrical channel of the fluid control chamber, the blockage detection ring 2 will be blocked. The impeller 41 is driven by the magnetic force control ring 42 to move toward the direction of the fluid control column 13, so that the magnetic force control ring 42 does not contact the magnetic force control ring 42, thereby driving the butterfly cleaning impeller 41 to rotate with the flow of the medium inside the valve body. When the adhered impurities are difficult to remove, the butterfly cleaning impeller 41 that no longer rotates cuts the flowing medium and sends a different prompt sound to the outside world, which prompts the maintenance personnel to timely understand the impurity adhesion accumulation in the pilot control chamber, thereby realizing the blockage detection function of whether the impurities adhered to the inner wall of the fluid control chamber hinder the sliding of the fluid control plug 12;

[0050] The cleaning process of the impurities adhered to the inner wall of the fluid control cavity is as follows: when the blocking detection ring 2 is blocked by the impurities adhered to the sliding path of the fluid control plug 12 and shrinks toward the fluid control column 13, the limit magnetic ring 22 is driven to shrink toward the axial direction of the fluid control column 13, thereby weakening the magnetic attraction of the limit magnetic ring 22 to the magnetic control ring 42, so that the butterfly cleaning impeller 41 can rotate and move laterally with the flow of the fluid in the valve body, and the impurities adhered to the sliding path are cleaned, thereby completing the cleaning process of the impurities adhered to the control channel in the fluid control cavity of the valve body;

[0051] Flushing and cleaning process of the inner wall of the pilot control chamber: when the electromagnet is used on one side of the pilot solenoid valve body to control the accumulation of medium in the pilot control chamber, a thrust will be generated on the pilot control slide plug 11 on this side, and the flushing sleeve 5 will be driven to overlap with the blockage detection ring 2, thereby reducing the space of the flushing sleeve 5 on this side, and the cleaning liquid outside the flushing sleeve 5 (different from the circulating medium in the valve body) will be squeezed to the other side, and through the vortex flushing hole 51, when the cleaning liquid in the flushing sleeve 5 gushes out or enters, a vortex torrent will be formed to flush the inner wall of the pilot control chamber, thereby completing the cleaning process of the inner wall of the pilot control chamber, and avoiding the slow flow of the fluid in the pilot control chamber, and the impurities continue to adhere to the inner wall of the pilot control chamber, affecting the precise movement of the pilot control slide plug 11, so that the fluid control column 13 and the fluid control slide plug 12 cannot slide into place, thereby reducing the control accuracy of the multi-way solenoid valve core 1.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-channel fluid control solenoid valve structure, comprising a multi-way solenoid valve core (1) arranged in a pilot solenoid valve body, characterized in that: The multi-way solenoid valve core (1) is composed of a pilot control slide plug (11) arranged in a pilot control chamber of a pilot solenoid valve body, a fluid control slide plug (12) arranged in a fluid control chamber of the pilot solenoid valve body, and a fluid control column (13); the fluid control column (13) is provided with a fluid control unit for detecting the smoothness of movement of the fluid control slide plug (12) and cleaning impurities at a blocked position; the fluid control unit is composed of a slide plug blockage detection mechanism and a fluid impurity cleaning mechanism; The pilot control slide plug (11) is also provided with a pilot cavity cleaning mechanism for cleaning impurities in the pilot control cavity of the pilot solenoid valve body. The pilot cavity cleaning mechanism comprises a flushing sleeve (5) arranged on the side of the pilot control slide plug (11) close to the fluid control column (13). The flushing sleeve (5) is sleeved on the outside with a spring limiter assembly (6) arranged in the spring control cavity of the pilot solenoid valve body for limiting the sliding of the fluid control column (13). The slide plug blockage detection mechanism comprises a blockage detection ring (2) arranged on a fluid control column (13); a blockage detection bracket (3) is arranged on the inner wall of the fluid control column (13); a support spring column (31) is fixed to the outside of the blockage detection bracket (3); a limiting sleeve (21) is fixed to the side of the blockage detection ring (2) close to the blockage detection bracket (3); and a limiting magnetic ring (22) is sleeved on the outside of the limiting sleeve (21); The blockage detection ring (2) is arranged on the left and right sides of the fluid control sliding plug (12), the fluid control sliding plug (12) slides with the inner wall of the fluid control cavity of the pilot solenoid valve body, and the diameter of the blockage detection ring (2) is adapted to the diameter of the fluid control sliding plug (12); The fluid impurity cleaning mechanism comprises a cleaning sleeve (4) slidably connected to the outer surface of a fluid control column (13); a butterfly-type cleaning impeller (41) is fixed to the outer surface of the cleaning sleeve (4); a cleaning control magnet is arranged on the inner side of the cleaning sleeve (4); a magnetic control ring (42) is magnetically attracted to the cleaning sleeve (44) by the cleaning control magnet; and a side surface of the magnetic control ring (42) is magnetically attracted to a limiting magnetic ring (22).

2. A multi-channel fluid control solenoid valve structure according to claim 1, characterized in that: The limiting sleeve (21) is sealingly and slidably connected to the supporting spring column (31) via a compression spring (32); a plurality of the blocking detection rings (2) are provided, and contraction intervals are provided between the plurality of the blocking detection rings (2).

3. A multi-channel fluid control solenoid valve structure according to claim 1, characterized in that: The inner wall of the fluid control column (13) is provided with a detection cavity, the side of the limit magnetic ring (22) close to the blocking detection ring (2) is in contact with the inner wall of the detection cavity, and a permanent magnet is provided on the side of the limit magnetic ring (22).

4. The multi-channel fluid control solenoid valve structure according to claim 1, characterized in that: Two butterfly-type cleaning impellers (41) are provided, and circulation grooves are provided on the surfaces of the butterfly-type cleaning impellers (41). The circulation grooves of two adjacent butterfly-type cleaning impellers (41) are arranged alternately.

5. A multi-channel fluid control solenoid valve structure according to claim 4, characterized in that: The butterfly cleaning impeller (41) is provided with fluid-inclined blades (411), and the diameter of the butterfly cleaning impeller (41) is matched to the diameter of the fluid control sliding plug (12).

6. The multi-channel fluid control solenoid valve structure according to claim 1, characterized in that: The inner wall of the flushing sleeve (5) is provided with a vortex flushing hole (51), and the outer side of the multi-way solenoid valve core (1) is also provided with a sealing plug (14) for closing the spring control chamber.

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