Squeezing and capturing device for redundant materials in Dewar

Abstract

The invention relates to the technical field of infrared detection devices, in particular to an extrusion capture device for redundant materials in a Dewar flask, which comprises an adsorption structure which is a hollow closed shell, and a plurality of conical holes are formed in the bottom of the adsorption structure; the adsorption structure is driven by the movement mechanism to move in the height direction. The adsorption structure is attached to the Dewar cold finger and extrudes and adsorbs redundant materials on the Dewar cold finger, so that the redundant materials enter the cavity of the adsorption structure through the conical hole. In order to solve the problem that after a redundant object catching structure in a Dewar in the prior art catches redundant objects, the redundant objects still have the risk of separation, a hollow box-shaped adsorption structure is introduced, and the redundant objects are squeezed and caught through up-and-down movement and enter the adsorption structure through a conical hole; and after entering the adsorption structure, the redundant materials can be quickly separated from the conical hole area due to up-down vibration and are wrapped in the adsorption structure, and the risk of redundant material separation is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of infrared detection devices, in particular to a device for squeezing and capturing excess matter in a dewar. Background Art

[0002] An infrared detector is a sensor used to detect infrared radiation and is widely used in night vision, thermal imaging, industrial inspection, and other fields. Its structure includes a detector chip, a dewar, a cold head, circuitry, and packaging. Typically, to achieve a good signal-to-noise ratio, the detector chip needs to be cooled by refrigeration to reduce the device's own thermal noise, thereby facilitating the separation of tiny thermal radiation signals from background signals. To achieve this cooling process, the detector chip and related peripheral circuitry are typically placed in a dewar flask, which effectively isolates heat transfer. The cold head then contacts the detector chip's substrate to continuously cool it.

[0003] With the development of aerospace technology, infrared detectors are increasingly being used in vehicles such as aircraft and rockets that experience high vibration levels. However, high-level vibrations can cause friction, wear, and detachment between the getter and the inner surface coating of the cold shield inside the dewar, forming debris inside the dewar. This debris not only reduces the vacuum level but also interferes with chip imaging. For example, debris can adhere to pixels, obstructing normal imaging. During vibration, the debris can move irregularly, obstructing pixels and interfering with infrared imaging. It can also collide with pixels, forming blind pixels.

[0004] To solve this problem, the prior art usually uses grooves and other devices to capture excess matter. For example, Chinese patent CN202410675118.8 discloses a device for removing excess matter from the interior of the Dewar and a method for preparing an adsorbent, including an adsorbent for adsorbing excess matter. The adsorbent is rotatably arranged inside the Dewar around the axis of the Dewar. The adsorbent includes a soft matter body and a metal baffle at the bottom of the soft matter body. The bottom surface of the soft matter body on the side of the metal baffle facing the rotation direction of the adsorbent is provided with a first pit; an inner magnet is located inside the adsorbent; a transmission assembly is located outside the Dewar, and the transmission assembly includes an outer magnet for pulling the inner magnet. The transmission assembly pulls the outer magnet to drive the adsorbent to rotate, and the excess matter is adsorbed into the first pit. It can collect the excess matter inside the Dewar without generating additional excess matter, and also prolongs the vacuum service life and avoids the influence of the excess matter on the Dewar imaging.

[0005] For example, Chinese patent CN202111573876.1 provides an exhaust trough comprising a trough body, an exhaust passage for high-temperature gas, and a blocking structure for blocking excess material. The blocking structure comprises a plurality of protrusions disposed on the trough wall. Along the direction of high-temperature gas discharge from the exhaust passage, the angle between the edge of each protrusion near the exhaust passage outlet and the trough wall is greater than 0° and less than or equal to 90°. A cold shield is also provided, comprising a body and the aforementioned exhaust trough. A cold shield assembly is also provided. A cold head component is also provided. A dewar is also provided. An infrared detector is also provided. By providing protrusions within the trough body and controlling the angle between the protrusions and the trough wall, excess material from the outside can be blocked and prevented from entering the cold shield. Furthermore, when excess material accumulates in the exhaust passage to the point of saturation, the passage automatically closes, blocking any further excess material from entering, significantly reducing the likelihood of excess material accumulating within the cold shield.

[0006] However, during the actual implementation process, the inventors found that this type of technical solution usually uses grooves of a specific shape to guide the excess matter generated in the dewar so that the excess matter does not fall onto the cold screen. However, in some extreme working conditions, such as strong vibration scenarios, there is still a possibility that the excess matter will fall out of the groove. Summary of the Invention

[0007] In view of the above problems existing in the prior art, a device for squeezing and capturing excess matter in a dewar is now provided.

[0008] The specific technical solutions are as follows:

[0009] A device for squeezing and capturing excess matter in a dewar, comprising an adsorption structure and a motion mechanism;

[0010] The adsorption structure is disc-shaped when viewed from above;

[0011] The adsorption structure is a hollow closed shell, and a plurality of tapered holes are provided at the bottom of the adsorption structure;

[0012] The adsorption structure is driven by the motion mechanism to move along the height direction;

[0013] The adsorption structure fits the Dewar cold finger and squeezes and adsorbs excess matter on the Dewar cold finger, so that the excess matter enters the cavity of the adsorption structure through the tapered hole.

[0014] On the other hand, a first displacement magnet is provided on the outer side of the shell of the adsorption structure;

[0015] The motion mechanism is arranged outside the Dewar flask and includes a height drive rack and a vertical motor;

[0016] The outer side surface of the height driving rack is driven by the vertical motor to move in the height direction;

[0017] A second displacement magnet matching the first displacement magnet is provided on the inner side surface of the height driving rack;

[0018] The second displacement magnet attracts the first displacement magnet and moves in a height direction, so as to drive the adsorption structure to move up and down.

[0019] On the other hand, the motion mechanism further comprises an annular base and a horizontal motor;

[0020] The height drive rack and the vertical motor are mounted on the annular base via a bracket;

[0021] An annular rack is provided on the annular base;

[0022] The horizontal motor drives the annular rack to rotate, thereby driving the height drive rack to rotate;

[0023] The second displacement magnet causes the adsorption structure to rotate in the Dewar flask by adsorbing the first displacement magnet.

[0024] On the other hand, a first spiral structure is provided on the lower surface of the upper cover of the adsorption structure, and the first spiral structure is spiral in the upward direction;

[0025] The first helical structure rotates in a helical direction so that the excess matter entering the cavity moves toward the center along the helical line of the first helical structure;

[0026] The bottom of the adsorption structure at the center is provided with an adhesive material to fix the excess matter that has entered.

[0027] On the other hand, a second spiral structure is provided on the lower surface of the upper cover of the adsorption structure, and the second spiral structure is spiral in the upward direction;

[0028] The outermost circle of the second helical structure is provided with a helical cut-off region;

[0029] The spiral cutoff region includes a plurality of spirals having a slope greater than that of the second spiral structure;

[0030] The two ends of the spiral are respectively connected to adjacent pitches of the second spiral structure to obtain a plurality of quadrilateral regions as adsorption cavities;

[0031] A sticky material is provided in the adsorption cavity to fix the excess matter;

[0032] The second spiral structure rotates in the opposite direction of the spiral, so that the excess matter moves outward along the spiral line of the second spiral structure and enters the adsorption chamber to be captured.

[0033] On the other hand, a plurality of adsorption through holes are distributed on the upper cover of the adsorption structure;

[0034] The adsorption structure further includes an adsorption plate, and a plurality of adsorption columns are provided on the lower surface of the adsorption plate;

[0035] The adsorption column captures the excess matter by magnetic adsorption, electrostatic adsorption or porous material adsorption;

[0036] The adsorption column passes through the adsorption through hole to reach the interior of the adsorption structure;

[0037] The adsorption structure reciprocates within a preset height range, so that the adsorption plate generates a relative displacement relative to the adsorption structure at a fixed height, thereby causing the adsorption column to perform adsorption.

[0038] On the other hand, when the adsorption column adopts electrostatic adsorption, the adsorption column is a glass column;

[0039] The inner wall of the adsorption through hole is provided with multiple groups of rubber threads;

[0040] When the adsorption structure moves, the glass column moves up and down relative to the adsorption structure and rubs against the rubber wire, so that the surface of the glass column is charged with static electricity.

[0041] On the other hand, a gel film is further provided at the end of the adsorption column, and the gel film is used to fix the excess matter.

[0042] In another aspect, the motion mechanism includes a magnetic height drive mechanism;

[0043] The magnetic height driving mechanism includes a conductive bearing and a coil;

[0044] The side wall of the Dewar flask is provided with a conductive strip running through the inside and outside, and the conductive strip is connected to an external power supply circuit;

[0045] The rotating shaft of the conductive bearing is installed on the side of the adsorption structure, and the conductive bearing is against the conductive strip;

[0046] One end of the coil is connected to the rotating shaft of the conductive bearing;

[0047] The coil surrounds the adsorption through hole;

[0048] The magnetic height driving mechanism changes the current intensity of the power supply circuit so that the magnetic field intensity of the coil changes, thereby driving the adsorption column to move up and down.

[0049] The above technical solution has the following advantages or beneficial effects:

[0050] In order to solve the problem that the excess matter capture structure in the existing technology still has the risk of escaping after capturing the excess matter, a hollow box-shaped adsorption structure is introduced. The excess matter is captured by squeezing and entering the adsorption structure through the conical hole through the up and down movement. After entering the adsorption structure, the excess matter will quickly escape from the conical hole area due to the up and down vibration and be wrapped inside the adsorption structure, which greatly reduces the risk of excess matter escaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The embodiments of the present invention will be described more fully with reference to the accompanying drawings, which are provided for illustration and description only and are not intended to limit the scope of the present invention.

[0052] Figure 1 is an overall schematic diagram of an embodiment of the present invention;

[0053] Figure 2 Schematic diagram of a cross-section of the structure in an embodiment of the present invention;

[0054] Figure 3 Schematic diagram of an annular base in an embodiment of the present invention;

[0055] Figure 4 This is a bottom view of the first spiral structure in an embodiment of the present invention;

[0056] Figure 5 Schematic diagram of cleaning the first spiral structure in an embodiment of the present invention;

[0057] Figure 6 This is a bottom view of the second spiral structure in an embodiment of the present invention;

[0058] Figure 7 Schematic diagram of cleaning the second spiral structure in an embodiment of the present invention;

[0059] Figure 8 Schematic diagram of an adsorption column in an embodiment of the present invention;

[0060] Figure 9 Schematic diagram of a glass column in an embodiment of the present invention;

[0061] Figure 10 Schematic diagram of the magnetic drive mechanism in an embodiment of the present invention. DETAILED DESCRIPTION

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0063] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this specification and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to this specification.

[0064] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other.

[0065] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0066] The present invention comprises:

[0067] A device for squeezing and capturing excess material in a Duvall, such as Figure 1 As shown, it includes an adsorption structure 1 and a motion mechanism 2;

[0068] The adsorption structure 1 is disc-shaped when viewed from above;

[0069] The adsorption structure 1 is a hollow closed shell, and a plurality of tapered holes 11 are provided at the bottom of the adsorption structure 1;

[0070] The adsorption structure 1 is driven by the motion mechanism 2 to move in the height direction;

[0071] The adsorption structure 1 fits the Dewar cold finger and squeezes and adsorbs the excess matter on the Dewar cold finger, so that the excess matter enters the cavity of the adsorption structure 1 through the tapered hole 11 .

[0072] Specifically, in order to address the problem that the excess matter capture structure in the prior art still has the risk of escaping after capturing the excess matter, a hollow box-shaped adsorption structure 1 is introduced. The excess matter is captured by squeezing the excess matter through the conical hole 11 through the up and down movement to enter the interior of the adsorption structure 1. After entering the adsorption structure 1, the excess matter will quickly escape from the conical hole area due to the up and down vibration and be wrapped inside the adsorption structure 1, which greatly reduces the risk of the excess matter escaping.

[0073] Specifically, the above-mentioned cleaning device is mainly arranged at the bottom of the Dewar flask, near the area of ​​the Dewar cold finger. The adsorption structure 1 is roughly hollow ring-shaped, and the middle through hole is used to allow the cold stage to pass through. The adsorption structure 1 has a certain thickness, and the inside of the ring is also a hollow structure for capturing excess matter.

[0074] A conical hole 11 is provided at the bottom of the adsorption structure 1. When the adsorption structure 1 moves up and down, the excess matter will be squeezed by the conical hole and then enter the interior of the adsorption structure 1. Since the adsorption structure 1 will move up and down under the drive of the motion mechanism, the excess matter will quickly leave the area of ​​the conical hole 11 after being squeezed into the conical hole 11 and enter the cavity of the adsorption structure 1.

[0075] Since the adsorption structure 1 itself is a hollow box-shaped structure, the excess matter will be stored in the cavity and will not affect the cold screen and the infrared detector, and the excess matter will not easily escape from the conical hole 11 in the reverse direction.

[0076] In order to achieve a better effect of capturing waste materials, a waste material collection structure can also be set in the adsorption structure 1, for example, a sticky material is set to bond and fix the waste materials, and the waste materials are further collected through a specific sweeping structure, etc. A variety of typical collection structures will be provided below.

[0077] In one embodiment, Figure 2 As shown, a first displacement magnet 12 is provided on the outer side of the shell of the adsorption structure 1;

[0078] The motion mechanism 2 is arranged outside the Dewar flask and includes a height drive rack 21 and a vertical motor 22;

[0079] The outer side surface of the height driving rack 21 is driven by the vertical motor 22 to move in the height direction;

[0080] A second displacement magnet 23 matching the first displacement magnet 12 is provided on the inner side surface of the height driving rack 21;

[0081] The second displacement magnet 23 attracts the first displacement magnet 12 and moves in the height direction, so as to drive the adsorption structure 1 to move up and down.

[0082] Specifically, considering that the friction between grease and bearings during the operation of the motor is likely to form additional waste, in this embodiment, the motion mechanism 2 is chosen to be set outside the adsorption structure 1, and the first displacement magnet 12 is adsorbed by the second displacement magnet 23 to move in the height direction, thereby driving the adsorption structure 1 to move up and down.

[0083] To achieve this transmission process based on magnetic adsorption, a motion mechanism 2 is required to be provided on the outside of the Dewar flask. A height-driven rack 21 and a vertical motor 22 are fixed to the bottom of the Dewar flask, near the outer wall, via a bracket (not shown in the figure). The bracket generally comprises a vertically mounted chute structure, in which the height-driven rack 21 is slidably mounted and capable of moving up and down along the chute structure. The bracket also comprises a motor bracket of a fixed height, on which the vertical motor 22 is mounted. A gear structure is provided at the end point of the drive shaft of the vertical motor 22, wherein the axial direction of the drive shaft is perpendicular to the chute structure. The gear structure is oriented in the same direction as the height-driven rack 21, and is used to engage with the height-driven rack 21 and drive the height-driven rack 21 to move up and down.

[0084] The rack surface of the height-driven rack 21 is set on the outside, with sliding structures matching the slide structure on both sides, and the second displacement magnet 23 is installed on the inside. The first displacement magnet 12 is set on the outside of the shell of the adsorption structure 1. The first displacement magnet 12 and the second displacement magnet 23 are fitted with the Dewar flask, which can achieve a relatively firm adsorption effect.

[0085] When the height driving rack 21 is driven by the vertical motor 22 to move in the height direction, the second displacement magnet 23 attracts the first displacement magnet 12 to move in the height direction, thereby driving the adsorption structure 1 to move up and down.

[0086] In one embodiment, Figure 3 As shown, the motion mechanism 2 further includes an annular base 24 and a horizontal motor 25;

[0087] The height drive rack 21 and the vertical motor 22 are mounted on the annular base 24 through a bracket; an annular rack is provided on the annular base 24;

[0088] The horizontal motor 25 drives the annular rack to rotate, thereby driving the height drive rack 21 to rotate;

[0089] The second displacement magnet 23 causes the adsorption structure 1 to rotate in the Dewar flask by adsorbing the first displacement magnet 12 .

[0090] Specifically, in order to achieve a better cleaning effect, in this embodiment, a driving structure is further provided that can drive the height driving rack 21 to rotate along the circumferential direction of the bottom surface of the Dewar flask.

[0091] Specifically, the structure includes an annular base 24 and a horizontal motor 25. The annular base 24 is an annular structure, and the bottom is mounted on a base plate extending from the bottom of the Dewar flask through an annular groove or annular guide rail. The annular groove enables the annular base 24 to rotate freely in the circumferential direction and constrains movement in other directions.

[0092] The horizontal motor 25 is fixedly mounted on a base plate extending from the bottom of the Dewar flask. The front end of the drive shaft is provided with a gear that matches the annular rack provided on the annular base 24. The horizontal motor 25 drives the annular rack to rotate, thereby causing the annular base 24 to drive the upper bracket to rotate together. The height drive rack 21 is rotated through the mechanical transmission structure, and the second displacement magnet 23 rotates the adsorption structure 1 in the Dewar flask by adsorbing the first displacement magnet 12.

[0093] In one embodiment, Figure 4 、 5 As shown, the lower surface of the upper cover of the adsorption structure 1 is provided with a first spiral structure 13, and the first spiral structure 13 is spiral in the upward direction;

[0094] The first helical structure 13 rotates in a helical direction so that the excess matter entering the cavity moves toward the center along the helical line of the first helical structure 13;

[0095] The bottom of the suction structure 1 at the center is provided with an adhesive material to fix the incoming excess.

[0096] Specifically, in order to achieve a better capture effect on excess matter entering the adsorption structure 1 and prevent the excess matter from escaping from the adsorption structure 1, in this embodiment, a first spiral structure 13 is provided on the lower surface of the upper cover of the adsorption structure 1. The first spiral structure 13 is spiral in the upward direction and is a vertically arranged plate-like structure in the side direction.

[0097] The spiral of the first spiral structure 13 matches the position of the tapered hole 11 at the bottom. When excess matter passes through the tapered hole 11 , it usually falls into the empty slot between two pitches of the first spiral structure 13 .

[0098] The first spiral structure 13 will move along the spiral direction driven by the upper cover, for example, Figure 4 Taking the structure shown as an example, the first spiral structure 13 is a right spiral when viewed from above and moves in a counterclockwise direction.

[0099] The excess matter that enters the empty groove will be pushed toward the middle direction by the side wall of the spiral as the first spiral structure 13 rotates. A sticky material is provided in the groove in the middle direction, for example, a layer of 100-200 microns thick gel is adhered to the bottom of the adsorption chamber to adhere and fix the excess matter, thereby achieving a more effective fixing process.

[0100] In one embodiment, Figure 6 、 7 As shown, the lower surface of the upper cover of the adsorption structure 1 is provided with a second spiral structure 14, and the second spiral structure 14 is spiral in the upward direction;

[0101] The outermost circle of the second helical structure 14 is provided with a helical cut-off region 141;

[0102] The spiral cut-off region 141 includes a plurality of spirals having a slope greater than that of the second spiral structure;

[0103] The two ends of the spiral are respectively connected to the adjacent pitches of the second spiral structure to obtain a plurality of quadrilateral regions as adsorption cavities;

[0104] A sticky material is provided in the adsorption chamber to fix the excess material;

[0105] The second spiral structure 14 rotates in the opposite direction of the spiral so that the excess matter moves outward along the spiral line of the second spiral structure and enters the adsorption chamber to be captured.

[0106] Specifically, in order to achieve a better capture effect on excess matter entering the adsorption structure 1 and prevent the excess matter from escaping from the adsorption structure 1, in this embodiment, a second spiral structure 14 is provided on the lower surface of the upper cover of the adsorption structure 1. The second spiral structure 14 is spiral in the upward direction and is a vertically arranged plate-like structure in the side direction.

[0107] Furthermore, the outermost circle of the second spiral structure 14 is divided by several spirals with larger slopes to obtain multiple independent adsorption cavities. The adsorption cavity is provided with a viscous material, such as gel, which can fix the excess matter entering the adsorption cavity.

[0108] The spiral of the second spiral structure 14 matches the position of the tapered hole 11 at the bottom. When excess matter passes through the tapered hole 11 , it usually falls into the empty slot between two pitches of the second spiral structure 14 .

[0109] The second spiral structure 14 will move along the spiral direction driven by the upper cover, for example, Figure 6 Taking the structure shown as an example, the second spiral structure 14 is a right spiral when viewed from above and moves in a clockwise direction.

[0110] The excess material that enters the empty groove will be pushed toward the outer circle by the side wall of the spiral as the second spiral structure 14 rotates. When it reaches the outermost circle, it will pass through the spiral into the adsorption cavity and be fixed by the sticky material in the adsorption cavity, thereby achieving a more effective fixing process.

[0111] In one embodiment, Figure 8As shown, a plurality of adsorption through holes 17 are distributed on the upper cover of the adsorption structure 1;

[0112] The adsorption structure 1 further includes an adsorption plate 15 , and a plurality of adsorption columns 16 are provided on the lower surface of the adsorption plate 15 ;

[0113] The adsorption column 16 uses magnetic adsorption, electrostatic adsorption or porous material adsorption to capture excess matter;

[0114] The adsorption column 16 passes through the adsorption through hole 17 and reaches the interior of the adsorption structure 1;

[0115] The adsorption structure 1 moves back and forth within a preset height range, so that the adsorption plate 15 is relatively displaced relative to the adsorption structure 1 at a fixed height, thereby enabling the adsorption column to perform adsorption.

[0116] Specifically, to achieve better capture of various particulates, this embodiment uses columnar adsorption columns to further capture excess matter inside. Specifically, the top of the box-shaped adsorption structure 1 is provided with an adsorption through-hole 17, and an adsorption plate 15 is disposed above the adsorption structure 1. The lower surface of the adsorption plate 15 is provided with multiple adsorption columns 16. The adsorption columns 16 have adsorption properties on their surfaces, and when they pass through the adsorption through-hole 17 and reach the interior, they can adhere to excess matter inside the cavity.

[0117] Generally speaking, the adsorption plate 15 can be fixed at a specific height, for example, it can be sleeved on the bottom end of the cold platform. When the adsorption structure 1 moves back and forth within a preset height range, the adsorption plate 15 produces a relative displacement relative to the adsorption structure 1 at a fixed height. At the same time, the adsorption structure 1 causes the excess matter inside to vibrate, thereby being adsorbed by the adsorption column 16.

[0118] The following are several typical types of adsorption columns 16:

[0119] 1. Magnet column: This type of adsorption column 16 is made of magnetic material and is magnetized, and can adsorb magnetic materials, such as stripped iron powder.

[0120] 2. Porous column: The surface of the porous column is processed into a tiny porous structure, which can absorb excess matter with a size of less than 10 microns through van der Waals force;

[0121] 3. Glass column. The surface of the glass column has static electricity through friction charging, which can effectively adsorb and fix charged particles.

[0122] Among them, Figure 9 As shown, when a glass column is used, a plurality of groups of rubber wires are provided on the inner wall of the adsorption through hole 17 corresponding to the glass column as an electrifying device.

[0123] When the adsorption structure 1 moves back and forth within a preset height range, the adsorption plate 15 produces relative displacement relative to the adsorption structure 1 at a fixed height. Therefore, the glass column and the rubber wire produce relative movement, resulting in friction and static electricity on the surface of the glass column.

[0124] At least one of the three adsorption columns 16 can be selected according to needs and randomly distributed below the adsorption plate 15 to achieve effective adsorption of various types of excess matter.

[0125] In one embodiment, a gel film is further provided at the end of the adsorption column 16 , and the gel film is used to fix the excess matter.

[0126] Specifically, in order to achieve a better fixing effect, in this embodiment, a gel film is also fixed at the end of the adsorption column 16. The gel film is fixed to the bottom of the adsorption column 16 and wraps part of the side wall near the end. With the reciprocating motion, it can adhere to the excess materials that fall off, thereby achieving effective fixation.

[0127] In one embodiment, Figure 10 As shown, the motion mechanism includes a magnetic height drive mechanism;

[0128] The magnetic height driving mechanism includes a conductive bearing 181 and a coil 182;

[0129] The side wall of the Dewar flask is provided with a conductive strip 183 that runs through the inside and outside, and the conductive strip 183 is connected to the external power supply circuit;

[0130] The rotating shaft of the conductive bearing 181 is installed on the side of the adsorption structure, and the conductive bearing 181 is against the conductive strip 183;

[0131] One end of the coil 182 is connected to the rotating shaft of the conductive bearing 181;

[0132] The coil 182 surrounds the adsorption through hole 17;

[0133] The magnetic height driving mechanism 18 changes the current intensity of the power supply circuit to change the magnetic field intensity of the coil, thereby driving the adsorption column 16 to move up and down.

[0134] Specifically, in order to make the adsorption structure 1 move up and down to improve the adsorption effect, another height driving device is provided in this embodiment. The structure integrates a magnetic driving mechanism in the adsorption structure 1. The magnetic driving mechanism uses the magnetic field formed by the coil 182 and the magnetic adsorption column to achieve the attraction and hovering process at a specific height.

[0135] Specifically, a metal wire is embedded in the upper cover of the adsorption structure 1. One end of the metal wire is connected to the rotating shaft of the conductive bearing 181 on the side wall. After the other end reaches the adsorption through hole 17 corresponding to the magnet column, it wraps around the adsorption through hole 17 for multiple turns to form a coil structure, and then the other end is connected to the conductive bearing on the other side.

[0136] A conductive strip 183 is provided on the Dewar flask at a position corresponding to the conductive bearing 181 in the vertical direction. The conductive strip 183 is fixed to the Dewar flask with insulating material around it.

[0137] When the power supply circuit applies direct current to the conductive strips 183 on both sides, a current path is formed: conductive strip 183 - conductive bearing 181 - rotating shaft - coil 182 - rotating shaft on the other side - conductive bearing 181 on the other side - conductive strip 183 on the other side, so that the coil 182 generates a magnetic field in a specific direction, interacting with the magnet column through attraction or repulsion to change the height.

[0138] While the height is changing, the conductive bearing 181 rotates and moves along the conductive strip 183 , so the circuit is not blocked.

[0139] The terms used in the embodiments of this specification are for the purpose of describing specific embodiments only and are not intended to limit this specification. Unless otherwise defined, technical or scientific terms used in the embodiments of this specification should have the ordinary meaning understood by a person of ordinary skill in the art to which this specification belongs. The terms "first," "second," and similar terms used in this specification and claims do not denote any order, quantity, or importance, but are simply used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather denote the presence of at least one. "Multiple" or "several" means two or more. Unless otherwise indicated, terms such as "front," "rear," "lower," and / or "upper" are for convenience only and are not intended to limit to a single position or spatial orientation. Terms such as "include" or "comprising" mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," "said," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0140] Although the present application includes many specific implementation details, these should not be interpreted as limiting the scope of any disclosure or the scope of protection claimed, but are mainly used to describe the features of the specific disclosed embodiments. Certain features described in multiple embodiments of the present application can also be implemented in combination in a single embodiment. On the other hand, the various features described in a single embodiment can also be implemented separately in multiple embodiments or implemented in any suitable sub-combination. In addition, although features can work in some combinations as described and even initially claim protection, one or more features from the claimed combination can be removed from the combination in some cases, and the claimed combination can point to a sub-combination or a variation of the sub-combination.

[0141] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for squeezing and capturing excess matter in a dewar, characterized in that: Including adsorption structure and motion mechanism; The adsorption structure is disc-shaped when viewed from above; The adsorption structure is a hollow closed shell, and a plurality of tapered holes are provided at the bottom of the adsorption structure; The adsorption structure is driven by the motion mechanism to move along the height direction; The adsorption structure fits the Dewar cold finger and squeezes and adsorbs excess matter on the Dewar cold finger, so that the excess matter enters the cavity of the adsorption structure through the tapered hole.

2. The squeeze capture device according to claim 1, characterized in that: A first displacement magnet is provided on the outer side of the shell of the adsorption structure; The motion mechanism is arranged outside the Dewar flask and includes a height drive rack and a vertical motor; The outer side surface of the height driving rack is driven by the vertical motor to move in the height direction; A second displacement magnet matching the first displacement magnet is provided on the inner side surface of the height driving rack; The second displacement magnet attracts the first displacement magnet and moves in a height direction, so as to drive the adsorption structure to move up and down.

3. The squeeze capture device according to claim 2, characterized in that: The motion mechanism also includes an annular base and a horizontal motor; The height drive rack and the vertical motor are mounted on the annular base via a bracket; An annular rack is provided on the annular base; The horizontal motor drives the annular rack to rotate, thereby driving the height drive rack to rotate; The second displacement magnet causes the adsorption structure to rotate in the Dewar flask by adsorbing the first displacement magnet.

4. The squeeze capture device according to claim 1, characterized in that: A first spiral structure is provided on the lower surface of the upper cover of the adsorption structure, and the first spiral structure is spiral in the upward direction; The first helical structure rotates in a helical direction so that the excess matter entering the cavity moves toward the center along the helical line of the first helical structure; The bottom of the adsorption structure at the center is provided with an adhesive material to fix the excess matter that has entered.

5. The squeeze capture device according to claim 1, characterized in that: A second spiral structure is provided on the lower surface of the upper cover of the adsorption structure, and the second spiral structure is spiral in the upward direction; The outermost circle of the second helical structure is provided with a helical cut-off region; The spiral cutoff region includes a plurality of spirals having a slope greater than that of the second spiral structure; The two ends of the spiral are respectively connected to adjacent pitches of the second spiral structure to obtain a plurality of quadrilateral regions as adsorption cavities; A sticky material is provided in the adsorption cavity to fix the excess matter; The second spiral structure rotates in the opposite direction of the spiral, so that the excess matter moves outward along the spiral line of the second spiral structure and enters the adsorption chamber to be captured.

6. The squeeze capture device according to claim 1, characterized in that: A plurality of adsorption through holes are distributed on the upper cover of the adsorption structure; The adsorption structure further comprises an adsorption plate, and a plurality of adsorption columns are provided on the lower surface of the adsorption plate; The adsorption column captures the excess matter by magnetic adsorption, electrostatic adsorption or porous material adsorption; The adsorption column passes through the adsorption through hole to reach the interior of the adsorption structure; The adsorption structure reciprocates within a preset height range, so that the adsorption plate generates a relative displacement relative to the adsorption structure at a fixed height, thereby causing the adsorption column to perform adsorption.

7. The squeeze capture device according to claim 6, characterized in that: When the adsorption column adopts electrostatic adsorption, the adsorption column is a glass column; The inner wall of the adsorption through hole is provided with multiple groups of rubber threads; When the adsorption structure moves, the glass column moves up and down relative to the adsorption structure and rubs against the rubber wire, so that the surface of the glass column is charged with static electricity.

8. The squeeze capture device according to claim 6, characterized in that: A gel film is further provided at the end of the adsorption column, and the gel film is used to fix the excess matter.

9. The squeeze capture device according to claim 6, characterized in that: The motion mechanism includes a magnetic height drive mechanism; The magnetic height driving mechanism includes a conductive bearing and a coil; The side wall of the Dewar flask is provided with a conductive strip running through the inside and outside, and the conductive strip is connected to the external power supply circuit; The rotating shaft of the conductive bearing is installed on the side of the adsorption structure, and the conductive bearing is against the conductive strip; One end of the coil is connected to the rotating shaft of the conductive bearing; The coil surrounds the adsorption through hole; The magnetic height driving mechanism changes the current intensity of the power supply circuit so that the magnetic field intensity of the coil changes, thereby driving the adsorption column to move up and down.

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