CN215487686U - Friction-free ultra-clean magnetic suspension valve - Google Patents

Abstract

The utility model discloses a friction-free ultra-clean magnetic suspension valve. The valve seat and the valve cover enclose an ultra-clean flow chamber, and the ultra-clean flow chamber is provided with an inlet and an outlet flow channel; the magnetic suspension valve core is arranged in the ultra-clean flow chamber; the actuating assembly is installed outside the valve cover, the external permanent magnet layered magnetic assembly is embedded in the actuating assembly, the external permanent magnet layered magnetic assembly is driven by the actuating assembly to move up and down along the ultra-clean flow chamber, and then the magnetic suspension valve core in the ultra-clean flow chamber is driven by magnetism to move up and down along the ultra-clean flow chamber so as to be close to or far away from the inlet flow channel and the outlet of the valve seat, so that valve control is realized. The utility model avoids the dynamic sealing structure required by the valve rod to push the valve core, avoids the risk of external leakage, prolongs the service life of the valve, realizes the passive magnetic suspension of the valve core while adjusting the opening degree, avoids the collision of the valve core with the wall, and reduces the pollution caused by the falling of particles.

Description

Friction-free ultra-clean magnetic suspension valve

Technical Field

The utility model relates to a magnetic suspension valve in the technical field of valves, in particular to a friction-free ultra-clean magnetic suspension valve suitable for ultra-clean occasions.

Background

The fields of semiconductors, biological medicines, electronic grade chemical engineering and the like are very sensitive to pollutants such as particulate matters, very high cleanliness requirements are provided for liquid or gas required by a production process, and materials or processes which reach a certain cleanliness standard are called ultra-clean materials or ultra-clean processes. In the field of ultra-clean fluid or corrosive fluid transmission and control, the valve is required to strictly prevent internal media from being communicated with the outside, and the valve is safe, reliable and corrosion-resistant, and meanwhile, abrasion and particles cannot be generated in the opening and closing process of the valve. The traditional valve is generally provided with an external extending control part similar to a valve rod, so that a dynamic sealing point is difficult to eliminate in principle, external leakage is easy to generate in the long-term and repeated opening and closing process, even internal media are communicated with the outside, and the potential safety hazard caused by the external leakage, the pollution of conveyed fluid and other consequences are very huge. In addition, because the conventional valves (such as ball valves, gate valves and butterfly valves) generally have sliding sealing pairs, the components can generate abrasion and particle shedding during the long-term sealing action, so that the media are polluted and the sealing is not tight.

In this regard, the general measure in the industry is to use a flexible element with elasticity as a sealing member to completely isolate the driving device such as the outer valve rod from the flow channel, such as a diaphragm valve (see patent WO2007089689a2, CN101365904A, CN1836124A, US20030722168) and a bellows valve, which are widely used in the industry, but in these examples, because the requirement of ultra-cleanness needs to be met, the elastic acting element often needs to be made of ultra-clean fluoroplastic, but the elastic membrane made of these materials has poor mechanical properties, especially fatigue stress performance, and the service life thereof is far shorter than that of a common actuating member such as a spring, and the elastic membrane is easy to crack and perforate during long-term action, which severely limits the service life of the valve as a whole and increases the risk of cracking.

The utility model is a Chinese utility model with application number CN201911054740.2, which provides an embedded ultra-clean valve of permanent magnet, embedding the permanent magnet with ultra-clean material shell into the flow chamber, and the elements (such as external electromagnet and external permanent magnet) for controlling the opening and closing are arranged outside the flow chamber, and the magnetic force acts on the permanent magnet valve core remotely in a non-contact way to realize the opening and closing control of the valve, thus eliminating the dynamic sealing point of the traditional valve due to the arrangement of control elements such as valve rod, and fundamentally stopping the possibility of external leakage on the premise of ensuring ultra-clean and corrosion resistance; compared with the existing diaphragm valve and the existing corrugated pipe valve, the problems that the elastic diaphragm is short in service life, weak in protection capability after being broken and the like are solved, and the service life and the safety performance of the ultra-clean valve are greatly improved. However, the utility model has the following disadvantages: the embedded magnet has a single form and can only be used as a switch valve, and the position of the valve core is difficult to accurately control to realize the flow regulation function.

The Chinese utility model with the application number of CN202011163914.1 provides an ultra-clean proportional valve, which realizes opening and closing of a valve port by using the minimum magnetic resistance principle and can realize accurate control on the position of the valve port; however, the magnetic circuit drives the valve core to move by means of suction force, so that the valve core is in contact with the wall surface in the radial direction, a small amount of friction exists between the wall surface and the valve core, particle shedding is increased, and the ultra-clean characteristic of a medium is damaged.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a friction-free ultra-clean magnetic suspension valve, which not only can realize radial passive suspension of a magnetic suspension valve core by spatially layering the magnetic suspension valve core and a magnetic group in an external driving assembly, avoid the collision between the valve core and the inner wall surface of a flow chamber, but also can realize non-contact control of the movement of the valve core by means of magnetic force and control the opening and closing of a valve port, thereby realizing the flow regulation function without friction.

The technical scheme adopted by the utility model is as follows:

the utility model comprises a valve seat and a valve cover, wherein the valve cover is arranged on the valve seat, and the utility model also comprises a magnetic suspension valve core and an actuating assembly; the valve seat and the valve cover are tightly assembled and are internally enclosed to form an ultra-clean flow chamber, and the ultra-clean flow chamber is provided with an inlet flow passage and an outlet flow passage which are communicated with the external environment; the magnetic suspension valve core is positioned in the ultra-clean flow chamber; the actuating assembly is installed outside the valve cover, the external permanent magnet layered magnetic assembly is embedded in the actuating assembly, the external permanent magnet layered magnetic assembly is driven by the actuating assembly to axially move up and down along the ultra-clean flow chamber, and then the magnetic suspension valve core in the ultra-clean flow chamber is magnetically driven to axially move up and down along the ultra-clean flow chamber so as to be close to or far away from the inlet flow channel and the outlet of the valve seat, so that valve control is realized.

The actuating assembly is integrally arranged on the outer wall of the valve cover and comprises an external permanent magnet layered magnetic group, a distance adjusting hand wheel and a connecting clamp, the external permanent magnet layered magnetic group, the distance adjusting hand wheel and the connecting clamp are arranged in a spatial layered mode, the distance adjusting hand wheel is sleeved on a threaded shaft at the upper end of the valve cover through threads, the connecting clamp is sleeved outside the valve cover below the distance adjusting hand wheel, an annular cavity is arranged between the bottom of the connecting clamp and the valve cover, and the external permanent magnet layered magnetic group is arranged in the annular cavity.

The connection clamp upper end be equipped with annular groove and annular bulge, the roll adjustment hand wheel lower extreme also is equipped with annular groove and annular bulge, the annular bulge of roll adjustment hand wheel inlays the annular groove of adorning in the connection clamp, the annular bulge of connection clamp inlays the annular groove of adorning in the roll adjustment hand wheel for connection clamp and roll adjustment hand wheel form axial rigid coupling relation each other.

The magnetic suspension valve core comprises an annular body, a block-shaped body, an embedded space layered magnetic assembly and a connecting arm; the annular body is positioned above the block-shaped body, an annular cavity is arranged in the annular body, an embedded space layering magnetic group is embedded in the annular cavity, the annular body is provided with a through flow hole, a gap in the vertical direction is formed between the annular body and the block-shaped body, the annular body and the block-shaped body are tightly connected through a plurality of connecting arms arranged at intervals along the circumferential direction, a hollow structure with an annular cavity is arranged in the annular body, and the block-shaped body is solid;

the top surface of the valve seat is provided with a convex surface at the outlet end of the inlet flow channel as a sealing boss, the bottom surface of the magnetic suspension valve core is provided with an inner concave surface as an annular sealing surface, and the sealing boss and the annular sealing surface are embedded corresponding to the phase line.

The embedded space layering magnetic component comprises an upper layer inner magnet, a middle layer inner connecting block and a attack, which are sequentially arranged from the upper layer to the lower layer, wherein the middle layer inner connecting block is positioned between the upper layer inner magnet and the lower layer inner magnet; the external permanent magnet layered magnetic component comprises an upper layer external magnet, a middle layer external connecting block and a lower layer external magnet which are sequentially arranged from the upper layer to the lower layer, wherein the middle layer external connecting block is positioned between the upper layer external magnet and the lower layer external magnet;

the upper layer inner magnet and the upper layer outer magnet are magnetized from inside to outside or from outside to inside along the radial direction, and the magnetizing directions are opposite; the inner magnet and the outer magnet of the lower layer are magnetized from inside to outside or from outside to inside along the radial direction, and the magnetizing directions are opposite; the magnetizing directions of the upper layer inner magnet and the lower layer inner magnet are the same, and the magnetizing directions of the upper layer outer magnet and the lower layer outer magnet are the same.

When the embedded spatial layered magnetic assembly is magnetically adsorbed by the external permanent magnet layered magnetic assembly through repulsive force, the mounting position of the upper inner magnet of the embedded spatial layered magnetic assembly is lower than that of the upper inner magnet of the external permanent magnet layered magnetic assembly, and meanwhile, the mounting position of the lower inner magnet of the embedded spatial layered magnetic assembly is higher than that of the lower inner magnet of the external permanent magnet layered magnetic assembly.

The embedded space layered magnetic component comprises an upper layer inner magnet positioned on the uppermost layer, a lower layer inner magnet positioned on the lowermost layer and at least one layer of magnetic ring positioned between the upper layer inner magnet and the lower layer inner magnet; the external permanent magnet layered magnetic component comprises an upper layer external magnet positioned on the uppermost layer, a lower layer external magnet positioned on the lowermost layer and at least one middle layer halbach annular array positioned between the upper layer external magnet and the lower layer external magnet;

the upper layer inner magnet and the upper layer outer magnet are magnetized from inside to outside or from outside to inside along the radial direction, and the magnetizing directions are opposite; the inner magnet and the outer magnet of the lower layer are magnetized from inside to outside or from outside to inside along the radial direction, and the magnetizing directions are opposite; the magnetizing directions of the upper layer inner magnet and the lower layer inner magnet are the same, and the magnetizing directions of the upper layer outer magnet and the lower layer outer magnet are the same; the magnetic ring is magnetized along the radial diameter in a single direction, the middle-layer halbach annular array is magnetized along the radial diameter in a single direction, and the magnetizing directions of the magnetic ring and the middle-layer halbach annular array are the same.

Two channels communicated with the outside and the ultra-clean flow chamber are arranged in the bottom end of the valve seat and are respectively used as an inlet channel and an outlet channel, and fluid enters the ultra-clean flow chamber through the inlet channel and is discharged from the ultra-clean flow chamber through the outlet channel.

The layered magnetic group of the embedded space and the external permanent magnet at least comprises two layers of permanent magnets in the vertical direction of valve installation, the inner magnets at the uppermost layer and the lowermost layer corresponding to the layered magnetic group of the embedded space and the external permanent magnet adopt a radial magnetizing mode, and the embedded magnet and the external magnet are oppositely magnetized, so that the like magnetic poles at the close ends of the same layer generate repulsion force, and the passive suspension of the valve core in the radial direction is realized.

The valve core has an axial position adjusting function, the valve core can be positioned and the opening degree of the valve core can be adjusted by clamping the embedded space layered magnetic assembly by two layers of arranged external permanent magnet layered magnetic assemblies through repulsive force, and the valve core can be axially adjusted by arranging a suction dragging layer in the middle layer by three or more layers of arranged magnetic arrays.

The embedded space layered magnetic group and the external permanent magnet layered magnetic group which are arranged in a space layered manner can be formed by pressing, bonding or fixedly connecting a plurality of permanent magnet clamps in different magnetizing directions, and a layered space structure can also be obtained by magnetizing a large permanent magnet in different regions.

The valve cover, the valve seat, the annular body of the magnetic suspension valve core, the block-shaped body and the connecting arm are all made of ultra-clean materials.

In order to ensure the ultra-clean characteristic, the embedded spatial layered magnetic groups which are spatially layered are embedded with ultra-clean materials in the injection molding process, or coated and coated on the surfaces of the embedded spatial layered magnetic groups by the ultra-clean materials to form the ultra-clean magnetic suspension valve core.

The ultra-clean material is fluorine-containing plastic and comprises perfluor alkoxy, polytetrafluoroethylene or polyvinylidene fluoride, or any combination thereof.

The ultra-clean differential electromagnetic valve is used for ultra-clean fluid output control in the fields of semiconductors, biological medicines, electronic grade chemical engineering and the like.

Through the arrangement of the magnetic layer structure, the magnetic suspension valve core 22 can better suspend in the ultra-clean flow chamber, and a certain gap is kept between the outer peripheral surface of the magnetic suspension valve core 22 and the inner wall of the ultra-clean flow chamber, so that the magnetic suspension valve core is not in contact with and has no friction.

The utility model drags the external permanent magnet layered magnetic assembly through the distance-adjusting hand wheel, changes the relative position of the embedded space layered magnetic assembly and the external permanent magnet layered magnetic assembly, realizes the non-contact control of the movement of the valve core, ensures the ultra-clean characteristic of fluid medium, and realizes the opening and closing of the valve port and the opening control.

The ultra-clean magnetic suspension valve can be used for ultra-clean fluid delivery control in the fields of semiconductors, biomedicines, electronic-grade chemical engineering and the like.

The utility model has the beneficial effects that:

the valve utilizes an ultra-clean material to coat the permanent magnet group in a layered manner to form the permanent magnet embedded magnetic suspension valve core arranged in a layered manner, and the magnetic suspension valve core can realize radial passive suspension through the layering of the magnetic group, so that the valve core is prevented from colliding with the inner wall surface of the flow chamber, and can realize non-contact control of the movement of the valve core by means of magnetic force to control the opening and closing of a valve port.

Compared with the traditional valve, the valve core of the utility model avoids the dynamic sealing structure required by the valve rod to push the valve core, and avoids the risk of external leakage. Compared with the existing mainstream ultra-clean valve, the ultra-clean valve has the advantages that quick-wear parts such as a diaphragm are not needed, and the overall service life of the valve is greatly prolonged. Compared with the existing ultra-clean magnetic drive proportional valve, the valve core passive magnetic suspension is realized while the opening degree can be adjusted, the valve core is prevented from colliding with the wall, the particle shedding pollution caused by friction pairs is reduced, and the ultra-clean requirement can be better met.

Drawings

FIG. 1 is a schematic structural view of example I of the present invention;

FIG. 2 is a schematic view of a magnetic levitation spool in accordance with an embodiment of the present invention; (a) is a three-dimensional view of the magnetic suspension valve core, and (b) is a sectional view of the magnetic suspension valve core;

FIG. 3 is a schematic external view of example I of the present invention;

FIG. 4 is a schematic structural diagram of example II of the present invention;

fig. 5 is a schematic diagram of a Halbach array and its internal magnetic field used in an intermediate layer in embodiment ii of the present invention.

In the figure: the device comprises an inlet flow channel 1, a valve seat 2, a threaded sealing surface 3, a valve cover 4, a lower layer outer magnet 5, a middle layer outer connecting block 6, an upper layer outer magnet 7, an external permanent magnet layered magnet group 8, a connecting clamp 9, an annular protrusion 10, a distance adjusting hand wheel 11, threads 12, a shaft 13, an ultra-clean wall surface layer 14, a through hole 15, an upper layer inner magnet 16, a middle layer inner connecting block 17, a lower layer inner magnet 18, an embedded space layered magnet group 19, a connecting arm 20, an annular sealing surface 21, a magnetic suspension valve core 22, a sealing boss 23, an outlet flow channel 24, a lower layer outer magnet 25, a middle layer halbach annular array 26, an upper layer outer magnet 27, an external permanent magnet layered magnet group 28, an upper layer inner magnet 29, a magnetic ring 30, a lower layer inner magnet 31 and an embedded space layered magnet group 32.

Detailed Description

The utility model is further described with reference to the following figures and embodiments.

The examples of the utility model are as follows:

example I

As shown in fig. 1 and 3, one implementation valve structure includes a valve seat 2, a valve cover 4, a magnetic levitation spool 22, and an actuating assembly; the valve cover 4 is cylindrical, the valve cover 4 is arranged on the valve seat 2, the valve seat 2 and the valve cover 4 are tightly assembled and are enclosed inside to form an ultra-clean flow chamber, the valve seat 2 and the valve cover 4 are connected through a threaded sealing surface 3, and the ultra-clean flow chamber is provided with an inlet flow passage 1 and an outlet flow passage 24 which are communicated with the external environment; two channels communicated with the outside and the ultra-clean flow chamber are arranged in the bottom end of the valve seat 9 and are respectively used as an inlet channel 1 and an outlet channel 24, and fluid enters the ultra-clean flow chamber through the inlet channel 1 and is discharged from the ultra-clean flow chamber through the outlet channel 24. The valve seat 2 and the valve cover 4 are in threaded connection through a sealing surface at the position 3, and the valve seat and the valve cover surround to form an internal flow chamber; the magnetic levitation spool 22 is located within the ultra clean flow chamber.

The actuating assembly is integrally arranged on the outer wall of the valve cover 4 and is a displacement device, the actuating assembly comprises an external permanent magnet layered magnetic group 8, a distance adjusting hand wheel 11 and a connecting clamp 9 which are arranged in a spatial layered manner, the distance adjusting hand wheel 11 is sleeved on a threaded shaft 13 at the upper end of the valve cover 4 through threads 12, the shaft 13 with the threads 12 is arranged at the upper end of the valve cover 4, and the distance adjusting hand wheel 11 is screwed on the shaft 13 and can move up and down; the valve cover 4 under the distance adjusting hand wheel 11 is sleeved with a connecting hoop 9, an annular cavity is arranged between the bottom of the connecting hoop 9 and the valve cover 4, and an external permanent magnet layered magnetic group 8 is arranged in the annular cavity. The external permanent magnet layered magnetic group 8 and the magnetic suspension valve core 22 are oppositely matched and arranged.

The upper end of the connecting clamp 9 is provided with an annular groove and an annular bulge 10, the lower end of the distance adjusting hand wheel 11 is also provided with an annular groove and an annular bulge, the annular groove and the annular bulge 10 of the connecting clamp 9 and the distance adjusting hand wheel 11 are alternately embedded, the annular bulge of the distance adjusting hand wheel 11 is embedded in the annular groove of the connecting clamp 9, and the annular bulge of the connecting clamp 9 is embedded in the annular groove of the distance adjusting hand wheel 11, so that the connecting clamp 9 and the distance adjusting hand wheel 11 form an axial fixed connection relationship with each other.

As shown in fig. 2, the magnetic suspension valve core 22 comprises an annular body, a block body, an embedded space layered magnetic group 19 and a connecting arm 20; the annular body is positioned above the block-shaped body, a closed annular cavity is arranged in the annular body, an embedded space layered magnetic group 19 is embedded in the annular cavity, the annular body outside the embedded space layered magnetic group 19 forms an ultra-clean wall surface layer 14 for embedding the permanent magnet 11, the embedded space layered magnetic group 19 is embedded in the ultra-clean wall surface layer 14 in an injection molding mode, namely, the permanent magnet is ensured not to be contacted with a conveying medium, the annular body is provided with a through hole 15, a gap in the vertical direction is formed between the annular body and the block-shaped body, the annular body and the block-shaped body are tightly connected through a plurality of connecting arms 20 arranged at intervals along the circumferential direction, the connecting arms 20 are L-shaped, the inner part of the annular body is provided with a hollow structure with an annular cavity, and the inner part of the block-shaped body is solid; the annular body and the block body are made of non-magnetic materials.

The top surface of the valve seat 2 is provided with a convex surface as a sealing boss 23 at the outlet end of the inlet flow channel 1, the bottom surface of the block body of the magnetic suspension valve core 22 is provided with an inner concave surface as an annular sealing surface 21, and the sealing boss 23 and the annular sealing surface 21 are embedded corresponding to a phase line; the annular sealing surface 21 can be tightly attached to the sealing boss 23 and block the flow passage, and when the sealing boss 23 is embedded into the annular sealing surface 21, the magnetic suspension valve core 22 is hermetically mounted on the valve seat 9 and blocks the inlet flow passage 1. Therefore, the front end of the magnetic suspension valve core is provided with an annular sealing surface which can be tightly matched with a boss surface of the valve seat to block fluid.

The connecting clamp 9 is driven to axially move up and down relative to the valve cover 4 by rotating the distance adjusting hand wheel 11, so as to drive the external permanent magnet layered magnetic set 8 in the annular cavity of the valve cover 4 to move up and down, and the relative position of the embedded space layered magnetic set 19 of the magnetic suspension valve core 22 and the external permanent magnet layered magnetic set 8 is changed.

Therefore, the position of the magnetic suspension valve core 22 is changed through the actuating assembly, the distance between the magnetic suspension valve core 22 and the sealing boss 23 on the valve seat 2 is adjusted, or the annular sealing surface 21 and the sealing boss 23 on the valve seat 2 are closed to block the outlet flow channel 24, and the flow regulation and opening and closing control functions of the valve are realized.

As shown in fig. 1 and 2, the embedded spatially layered magnetic component 19 arranged in a spatially layered manner is divided into an upper layer inner magnet 16, a middle layer inner connecting block 17, and a lower layer inner magnet 18, which are arranged in this order from the upper layer to the lower layer, the middle layer inner connecting block 17 being located between the upper layer inner magnet 16 and the lower layer inner magnet 18; correspondingly, the external permanent magnet layered magnetic group 8 which is spatially layered is composed of an upper layer external magnet 7, a middle layer external connecting block 6 and a lower layer external magnet 5 which are sequentially arranged from the upper layer to the lower layer, wherein the middle layer external connecting block 6 is positioned between the upper layer external magnet 7 and the lower layer external magnet 5;

the upper layer inner magnet 16 and the upper layer outer magnet 7 are magnetized from inside to outside or from outside to inside along the radial direction, the magnetizing directions are opposite, and specifically, if the inner ring of the upper layer inner magnet 16 is the N pole, the outer ring of the upper layer outer magnet 7 is the S pole, the outer ring of the N pole is the S pole; the lower layer inner magnet 18 and the lower layer outer magnet 5 are magnetized from inside to outside or from outside to inside along the radial direction, the magnetizing directions are opposite, and specifically, if the inner ring of the lower layer inner magnet 18, the outer ring of the N pole and the inner ring of the S pole are opposite, the outer ring of the lower layer outer magnet 5, the N pole and the inner ring of the S pole are opposite; the magnetizing directions of the upper layer inner magnet 16 and the lower layer inner magnet 18 are the same, and the magnetizing directions of the upper layer outer magnet 7 and the lower layer outer magnet 5 are the same. This causes a magnetic attraction of repulsive force nature between the embedded spatial layered magnetic grouping 19 and the external permanent magnet layered magnetic grouping 8.

The middle layer outer connecting block 6 and the middle layer inner connecting block 17 are made of non-magnetic materials, and the relation between the thickness of the middle layer outer connecting block 6 and the thickness of the middle layer inner connecting block 17 is as follows: the thickness of the middle layer inner connecting block 17 is smaller than that of the middle layer outer connecting block 6, so that the whole thickness of the embedded space layered magnetic assembly 19 is smaller than that of the external permanent magnet layered magnetic assembly 8. This enables the embedded spatial layer magnet assembly 19 to be held in place by a repulsive force in the middle of the magnetic field applied by the external permanent magnet layer magnet assembly 8.

When the internal embedded spatial layered magnetic assembly 19 is magnetically adsorbed by the external permanent magnet layered magnetic assembly 8 through a repulsive force, the mounting position of the upper inner magnet 16 of the internal embedded spatial layered magnetic assembly 19 is lower than that of the upper inner magnet 7 of the external permanent magnet layered magnetic assembly 8, and meanwhile, the mounting position of the lower inner magnet 18 of the internal embedded spatial layered magnetic assembly 19 is higher than that of the lower inner magnet 5 of the external permanent magnet layered magnetic assembly 8, namely, the magnetic suspension valve core 22 is subjected to the clamping force of the external permanent magnet layered magnetic assembly 8 in the axial direction.

The area determined by the respective central axis of the magnets in the upper layer and the lower layer of the magnetic suspension valve core 22 is the area (b) in the figure, the area determined by the respective central axis of the magnets in the upper layer and the lower layer of the external magnetic array 8 is the area (a) in the figure, and the area (b) in which the valve core works well cannot exceed the area (a), at the moment, the magnetic suspension valve core 22 is subjected to the stable clamping force of the external permanent magnet layered magnetic set 8, the connecting clamp 9 is driven to move up and down by rotating the distance adjusting hand wheel 11, the external permanent magnet layered magnetic set 8 is dragged to adjust the position of the magnetic suspension valve core 22, the non-contact control of the movement of the valve core is realized, and the functions of opening and closing the valve port and adjusting the opening degree are completed.

As shown in fig. 2, the magnetic suspension valve core 22 includes an ultra-clean material wall 14, a through hole 15 for fluid renewal and pressure difference balancing on two sides, an embedded permanent magnet array 19 divided into an upper layer, a middle layer and a lower layer, an ultra-clean material connecting arm 20 distributed along the circumference, and a sealing boss 21.

Preferably, the through-flow hole 15 is formed in the center of the valve core, so that the air gap between magnetic poles can be reduced, and the mechanical efficiency of the magnet is improved; the number of the ultra-clean material connecting arms 20 is preferably three arranged along the circumference at 120 degrees; the sealing boss 21 is in a conical ring shape, can be tightly matched with the sealing boss 23 on the valve seat 2, and is reliable in sealing.

The inner and outer magnets on the same layer are magnetized in the opposite radial direction, so that the outer layer of the inner ring and the inner layer of the outer ring are homonymous magnetic poles, as shown in fig. 1 and 4, arrows in the figure point to N poles of the permanent magnets, the tail ends of the permanent magnets are S poles, the magnetizing directions of the inner and outer rings can be interchanged, the homonymous magnetic poles at the close ends of the inner and outer layers of the upper layer and the lower layer respectively generate repulsive force, the passive suspension of the valve core in the radial direction is realized, the contact between the magnetic suspension valve core 22 and the inner wall of the valve cover 4 is reduced, the friction and the falling of particles are reduced, and the ultra-clean characteristic of a medium is ensured.

In order to meet the requirement of high-cleanliness occasions, the wall surface in the ultra-clean magnetic suspension valve, which is in contact with fluid, is made of an ultra-clean material, the embedded spatial layered magnetic assembly 19 which is spatially layered is embedded in the ultra-clean material in the injection molding process, or the surface of the embedded spatial layered magnetic assembly is coated with the ultra-clean material to form the ultra-clean magnetic suspension valve core 22, and the optional ultra-clean material comprises but is not limited to fluorine-containing plastics such as Perfluoroalkoxy (PFA), Polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF) and the like or any combination thereof.

The embedded space layered magnetic group 19 and the external permanent magnet layered magnetic group 8 which are arranged in a space layered manner can be formed by pressing, bonding or fixedly connecting a plurality of permanent magnet clamps in different magnetizing directions, and a layered space structure can also be obtained by magnetizing a large permanent magnet in different regions.

Furthermore, the distance adjusting hand wheel and the motor of the utility model form an external magnetic group dragging device, but the external magnetic group dragging device comprises but is not limited to the distance adjusting hand wheel 11, and an electric device or a hydraulic device such as a motor can be used for dragging the external permanent magnet layered magnetic group 8 to axially move.

Example II

As shown in fig. 4, the embedded spatial layered magnetic groups 32 arranged in a spatial layered manner are divided into an upper layer inner magnet 29 positioned at the uppermost layer, a lower layer inner magnet 31 positioned at the lowermost layer, and at least one layer of magnetic ring 30 positioned between the upper layer inner magnet 29 and the lower layer inner magnet 31, if a plurality of magnetic rings 30 are provided, the plurality of magnetic rings 30 are arranged in an up-down stacked manner, and the upper layer inner magnet 29, the lower layer inner magnet 31 and the magnetic rings 30 are all arranged closely; correspondingly, the external permanent magnet layered magnetic group 28 which is spatially layered is composed of an upper layer outer magnet 27 positioned at the uppermost layer, a lower layer outer magnet 25 positioned at the lowermost layer and at least one middle layer halbach annular array 26 positioned between the upper layer outer magnet 27 and the lower layer outer magnet 25, if a plurality of middle layer halbach annular arrays 26 are arranged, the plurality of middle layer halbach annular arrays 26 are arranged in an up-and-down layered manner, and the upper layer outer magnet 27, the lower layer outer magnet 25 and the middle layer halbach annular array 26 are all arranged tightly; the number of the middle-layer halbach annular arrays 26 is the same as that of the magnetic rings 30, and the middle-layer halbach annular arrays correspond to the magnetic rings 30 one by one.

The upper layer inner magnet 29 and the upper layer outer magnet 27 are magnetized from inside to outside or from outside to inside along the radial direction, the magnetizing directions are opposite, and specifically, if the inner ring of the upper layer inner magnet 29 is the north pole, the outer ring of the inner ring is the south pole, and the outer ring of the upper layer outer magnet 27 is the south pole; the lower layer inner magnet 31 and the lower layer outer magnet 25 are magnetized from inside to outside or from outside to inside along the radial direction, the magnetizing directions are opposite, and specifically, if the inner ring of the lower layer inner magnet 31 is the N pole, the outer ring of the N pole is the S pole, the inner ring of the N pole is the S pole; the magnetizing directions of the upper layer inner magnet 29 and the lower layer inner magnet 31 are the same, and the magnetizing directions of the upper layer outer magnet 27 and the lower layer outer magnet 25 are the same; the magnet ring 30 is magnetized along the radial diameter in a single direction, the middle-layer halbach annular array 26 is magnetized along the radial diameter in a single direction, and the magnet ring 30 and the middle-layer halbach annular array 26 are magnetized along the same direction. Thus, the embedded space layered magnetic assembly 32 and the external permanent magnet layered magnetic assembly 28 form magnetic adsorption with repulsive force property between the uppermost layer and the lowermost layer, but form magnetic adsorption with attractive force property between the intermediate layers, and the movable working range of the magnetic suspension valve core 22 in the ultra-clean flow chamber is expanded.

As shown in fig. 5, the middle-layer halbach annular array 26 is divided into a plurality of arc-shaped magnetic blocks sequentially arranged in an annular circle, the plurality of arc-shaped magnetic blocks are different in magnetizing direction, and are arranged in a certain rule, so that the arc-shaped magnetic blocks on two sides of the middle-layer halbach annular array 26 are symmetrically magnetized, and the middle-layer halbach annular array 26 is integrally magnetized along a radial diameter single direction.

Like this adopt between the interior outer magnet of upper strata and lower floor interbedded relative radial magnetization, make inner ring skin and outer loop inlayer be the same name magnetic pole, as shown in the figure, the arrow point in the figure is the N utmost point of permanent magnet, and the end is the S utmost point, and the interior outer loop direction of magnetizing can be exchanged, and the inner and outer inlayer of upper strata and lower floor is close to the end and produces the repulsion respectively, realizes the passive suspension of case radial direction, avoids the contact and the friction of magnetic suspension case 22 and valve gap 4 inner wall.

In the axial direction, the positioning of the magnetic suspension valve core 22 and the control of the valve opening degree do not depend on the clamping force of the upper and lower magnetic rings, but the valve core control opening degree is positioned through the suction force of the middle-layer halbach annular array 26 and the middle-layer magnetic ring 30 magnetized in the diameter direction, as shown in fig. 5, the axial view of the middle-layer halbach annular array 26 in the outer magnetic group is a group of annular permanent magnet arrays with different magnetizing directions, when the magnetic suspension valve core is combined in a magnetizing mode shown by an arrow, the magnetic field distribution of the inner annular surface of the array is as shown in fig. 5, the magnetic field distribution generates a suction effect on the middle-layer magnetic ring 30 magnetized in the diameter direction, and when the distance-adjusting hand wheel 11 is rotated to drag the external permanent magnet layered magnetic group 28, and the relative position of the embedded space layered magnetic group 32 and the external permanent magnet layered magnetic group 28 is changed, the magnetic suspension valve core is axially stressed to follow, so that the position adjustment and the flow rate adjustment function of the valve core are realized. At this time, the design of the working section of the valve core does not need to be limited according to the intervals (a) and (b) in the example I, and the upper end surface of the magnetic suspension valve core 22 is flush with or slightly lower than the upper end surface of the uppermost magnetic ring 27 of the external magnetic set.

The embedded space layered magnetic group 32, the external permanent magnet layered magnetic group 28 and the middle-layer halbach annular array 26 in the external magnetic group which are arranged in a spatial layered manner can be pressed, bonded or fixedly connected and formed by a plurality of permanent magnet clamps in different magnetizing directions, and a layered space structure can also be obtained by magnetizing a large permanent magnet in different regions.

In the positional relationship description of the present invention, the appearance of terms such as "inner", "outer", "upper", "lower", "left", "right", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings is merely for convenience of describing the embodiments and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and operation, and thus, is not to be construed as limiting the present invention.

The foregoing summary and structure are provided to explain the principles, general features, and advantages of the product and to enable others skilled in the art to understand the utility model. The foregoing examples and description have been presented to illustrate the principles of the utility model and are intended to provide various changes and modifications within the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (9)

1. The utility model provides a frictionless super clean magnetic levitation valve, includes disk seat (2) and valve gap (4), and its characterized in that is installed on disk seat (2) in valve gap (4): comprises a magnetic suspension valve core (22) and an actuating assembly; the valve seat (2) and the valve cover (4) are tightly assembled and are internally enclosed to form an ultra-clean flow chamber, and the ultra-clean flow chamber is provided with an inlet flow passage (1) and an outlet flow passage (24) which are communicated with the external environment; the magnetic suspension valve core (22) is positioned in the ultra-clean flow chamber; the actuating assembly is installed outside the valve cover (4), an external permanent magnet layered magnetic assembly (8/28) is embedded in the actuating assembly, the actuating assembly drives the external permanent magnet layered magnetic assembly (8/28) to move up and down along the ultra-clean flow chamber, and then the magnetic suspension valve core (22) in the ultra-clean flow chamber is driven by magnetism to move up and down along the ultra-clean flow chamber so as to be close to or far away from an inlet flow channel (1) and an outlet of the valve seat (2), and valve control is achieved.

2. The frictionless ultra-clean magnetic levitation valve as recited in claim 1, wherein:

the actuating assembly wholly sets up at valve gap (4) outer wall, actuating assembly includes external permanent magnet layering magnetism group (8/28), roll adjustment hand wheel (11) and connection clamp (9) that the space layering was arranged, roll adjustment hand wheel (11) are on screw shaft (13) of valve gap (4) upper end through screw thread (12) suit, valve gap (4) overcoat of roll adjustment hand wheel (11) below is equipped with and connects clamp (9), be equipped with between connection clamp (9) bottom and valve gap (4) annular chamber, install external permanent magnet layering magnetism group (8/28) in the annular chamber.

3. The frictionless ultra-clean magnetic levitation valve as recited in claim 2, wherein:

connection clamp (9) upper end be equipped with annular groove and annular bulge (10), roll adjustment hand wheel (11) lower extreme also is equipped with annular groove and annular bulge, the annular bulge of roll adjustment hand wheel (11) inlays the annular groove of inlaying in connection clamp (9), the annular bulge of connection clamp (9) inlays the annular groove of inlaying in roll adjustment hand wheel (11) for connect clamp (9) and roll adjustment hand wheel (11) and form axial rigid coupling relation each other.

4. The frictionless ultra-clean magnetic levitation valve as recited in claim 1, wherein:

the magnetic suspension valve core (22) comprises an annular body, a block body, an embedded space layered magnetic assembly (19/32) and a connecting arm (20); the ring body is located the massive body top, is equipped with annular cavity in the ring body, and embedded space layering magnetic unit (19/32) are installed to annular cavity embedded, and through-flow hole (15) are seted up to the ring body, have the clearance of upper and lower direction between ring body and the massive body, through a plurality of linking arms (20) zonulae occludens that set up along circumference interval around between ring body and the massive body, the inside hollow structure that sets up to having the annular chamber of ring body, the massive body is inside solid.

5. The frictionless ultra-clean magnetic levitation valve as recited in claim 1, wherein:

the top surface of the valve seat (2) is provided with a convex surface at the outlet end of the inlet flow channel (1) as a sealing boss (23), the bottom surface of the magnetic suspension valve core (22) is provided with an inner concave surface as an annular sealing surface (21), and the sealing boss (23) and the annular sealing surface (21) are embedded corresponding to the phase line.

6. The frictionless ultra-clean magnetic levitation valve as recited in claim 4, wherein:

the embedded space layered magnetic group (19/32) is divided into an upper layer inner magnet (16/29), a middle layer inner connecting block (17) and a lower layer inner magnet (18/31) which are sequentially arranged from the upper layer to the lower layer, wherein the middle layer inner connecting block (17) is positioned between the upper layer inner magnet (16/29) and the lower layer inner magnet (18/31); the external permanent magnet layered magnetic group (8/28) is divided into an upper layer external magnet (7/27), a middle layer external connecting block (6) and a lower layer external magnet (5/25) which are sequentially arranged from the upper layer to the lower layer, wherein the middle layer external connecting block (6) is positioned between the upper layer external magnet (7/27) and the lower layer external magnet (5/25);

the upper layer inner magnet (16/29) and the upper layer outer magnet (7/27) are magnetized from inside to outside or from outside to inside in the radial direction, and the magnetizing directions are opposite; the lower layer inner magnet (18/31) and the lower layer outer magnet (5/25) are magnetized from inside to outside or from outside to inside along the radial direction, and the magnetizing directions are opposite; the magnetizing directions of the upper layer inner magnet (16/29) and the lower layer inner magnet (18/31) are the same, and the magnetizing directions of the upper layer outer magnet (7/27) and the lower layer outer magnet (5/25) are the same.

7. The frictionless ultra-clean magnetic levitation valve as recited in claim 4, wherein:

the embedded space layered magnetic group (19/32) is divided into an upper layer inner magnet (16/29) positioned at the uppermost layer, a lower layer inner magnet (18/31) positioned at the lowermost layer and at least one layer of magnetic ring (30) positioned between the upper layer inner magnet (16/29) and the lower layer inner magnet (18/31); the external permanent magnet layered magnetic group (8/28) is divided into an upper layer outer magnet (7/27) positioned at the uppermost layer, a lower layer outer magnet (5/25) positioned at the lowermost layer and at least one layer of middle layer halbach annular array (26) positioned between the upper layer outer magnet (7/27) and the lower layer outer magnet (5/25);

the upper layer inner magnet (16/29) and the upper layer outer magnet (7/27) are magnetized from inside to outside or from outside to inside in the radial direction, and the magnetizing directions are opposite; the lower layer inner magnet (18/31) and the lower layer outer magnet (5/25) are magnetized from inside to outside or from outside to inside along the radial direction, and the magnetizing directions are opposite; the magnetizing directions of the upper layer inner magnet (16/29) and the lower layer inner magnet (18/31) are the same, and the magnetizing directions of the upper layer outer magnet (7/27) and the lower layer outer magnet (5/25) are the same; the magnetic ring (30) is magnetized along the radial diameter in a single direction, the middle-layer halbach annular array (26) is magnetized along the radial diameter in a single direction, and the magnetic ring (30) and the middle-layer halbach annular array (26) are magnetized in the same direction.

8. The frictionless ultra-clean magnetic levitation valve as recited in claim 1, wherein:

two channels communicated with the outside and the ultra-clean flow chamber are arranged in the bottom end of the valve seat (2) and are respectively used as an inlet channel (1) and an outlet channel (24), and fluid enters the ultra-clean flow chamber through the inlet channel (1) and is discharged from the ultra-clean flow chamber through the outlet channel (24).

9. The frictionless ultra-clean magnetic levitation valve as recited in claim 4, wherein:

the valve cover (4), the valve seat (2) and the annular body, the block-shaped body and the connecting arm (20) of the magnetic suspension valve core (22) are all made of ultra-clean materials.

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