Aluminum silver powder processing equipment with dynamic raking mechanism

Abstract

The aluminum silver powder processing equipment comprises a vacuum drying machine, the vacuum drying machine comprises a drying tank, a storage box with an opening in one end is arranged in the drying tank, and a plurality of through holes communicated with the drying tank are formed in the storage box; the opening direction of the storage box is the same as the opening direction of the drying tank, a plurality of material drying assemblies are longitudinally distributed in the storage box at intervals, and each material drying assembly comprises a material tray arranged in the storage box in a sliding mode and an overturning and raking assembly for overturning materials in the material tray; and the turning and harrowing assembly is used for turning and stirring the materials in the material tray along a random path. Materials are turned and stirred along a random path through the dynamic turning and harrowing assembly, a'drying shell layer 'formed in static drying is damaged, an inner layer solvent can rapidly escape, and the drying efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal powder processing, in particular to an aluminum silver powder processing equipment with a dynamic turning mechanism. BACKGROUND

[0002] In the field of metal powder processing, aluminum silver powder is a key raw material in high-end coating, ink and other fields, and its drying process directly affects product quality. At present, the industry generally uses vacuum oven static drying equipment, and its process is: aluminum silver powder containing solvent oil is flatly placed on a tray, and is subjected to distillation to remove solvent under the condition of 100℃±5℃ and vacuum degree -0.09MPa. However, this technology has the following significant defects: Low drying efficiency: with a material layer thickness of 4cm, the drying time is as long as 12-14 hours, which seriously restricts production efficiency; Poor heat transfer uniformity: there is a significant temperature gradient between the material layers, resulting in a higher oil content in the lower layer than in the upper layer due to insufficient heat transfer, and poor product uniformity; High solvent residue: the solid content of the finished product can only reach 98.3-98.7%, and the residual solvent accounts for 1.3-1.7%, which cannot meet the standard of solid content ≥99.8% (solvent residue ≤0.2%) for high-end applications (such as aerospace coatings and precision electronic inks); High energy consumption and labor cost: long drying time leads to a sharp increase in energy consumption, and static drying requires frequent manual loading and unloading of materials, which is labor-intensive.

[0003] In the prior art, the core problem of static drying is that the material is in a static state, and as the drying proceeds, a "dry shell layer" is formed on the surface, hindering the volatilization of the solvent in the inner layer and the heat transfer; at the same time, the lower layer of material is under greater pressure due to gravity, and the solvent has a long escape path, further exacerbating the difference between the layers. Therefore, developing an aluminum silver powder processing equipment that can break through the "shell effect" is the key to solving the above problems. SUMMARY

[0004] The main purpose of the present application is to provide an aluminum silver powder processing equipment with a dynamic turning mechanism, which aims to solve the technical problem of long drying time due to different dryness levels between the upper and lower layers of static drying material in the prior art.

[0005] To achieve the above purpose, the aluminum silver powder processing equipment with a dynamic turning mechanism provided by the present application comprises a vacuum dryer, wherein the vacuum dryer comprises a drying tank, the drying tank is connected with a dry dust collector, the dry dust collector is connected with a wet dust collector, the wet dust collector is connected with a condenser, the condenser is connected with a condensate receiving tank, the condensate receiving tank is connected with a vacuum pump, and the vacuum pump is connected with a water-gas separator. The dry tank is provided with a storage box with one end opening, a plurality of through holes are formed on the storage box and communicated with the dry tank, the opening direction of the storage box is the same as that of the dry tank, a plurality of groups of material drying assemblies are longitudinally and spacedly arranged in the storage box, the material drying assembly comprises a material tray slidingly arranged in the storage box and a turning rake assembly for turning over the material in the material tray, and the turning rake assembly is used for turning over the material in the material tray in a random path.

[0006] Preferably, the material drying assembly comprises a tray support arranged on the inner wall of the storage box and used for supporting the material tray and slidingly arranging the material tray in the storage box, and the tray support is provided with a buckle for fixing the position of the material tray.

[0007] Preferably, a heating space is formed on the bottom plate of the material tray, a heating wire is arranged in the heating space, a temperature sensor for detecting the temperature of the bottom plate of the material tray is embedded on the material tray, a first power supply contact is arranged on the tray support, and a second power supply contact is arranged below the material tray and used for contacting the first power supply contact.

[0008] Preferably, the turning rake assembly comprises a rake group, a moving assembly and a lifting assembly. The rake group is used for turning over the material in the material tray, the moving assembly is used for driving the rake group to move in the range of the material tray, the moving assembly is located above the material tray, and the lifting assembly is used for driving the material tray to move towards or away from one side of the material tray.

[0009] Preferably, the rake group comprises a vertically arranged support rod, a hollow connecting block connected to the lower end of the support rod, a first servo motor arranged in the support rod, a first bevel gear arranged in the connecting block, an output shaft of the first servo motor connected with the first bevel gear, two shafts symmetrically arranged on the two sides of the connecting block, one end of each shaft near the connecting block extending into the connecting block and rotationally matched with the connecting block, the shafts being horizontally arranged, one end of each shaft located on the connecting block being provided with a second bevel gear meshed with the first bevel gear, a sealing ring in sealing and rotationally matched with the connecting block arranged on the outer sleeve of the shaft, and a cylindrical cage composed of a plurality of iron rods horizontally sleeved on the outer wall of the shaft arranged on the outer side of the cylindrical cage.

[0010] Preferably, the moving assembly comprises two first horizontal rods horizontally and symmetrically arranged above the material tray and two second horizontal rods horizontally and symmetrically arranged, the extending direction of the second horizontal rods being perpendicular to the extending direction of the first horizontal rods, the first horizontal rods being located between the second horizontal rods, and the first horizontal rods and the second horizontal rods being mutually spliced to form a rectangular frame. A first receiving cavity is formed in each first horizontal rod, and a second receiving cavity is formed in each second horizontal rod. Each of the first accommodation cavity is provided with a second servo motor, the output shaft of the second servo motor is connected with a first screw rod, the extension direction of the first screw rod is same with the extension direction of the first cross bar, the first screw rod is threadedly engaged with a first sliding block, the first accommodation cavity is formed with a first sliding groove for the first sliding block to slide, the first sliding groove is used for preventing the first sliding block from rotating in the first accommodation cavity, the extension direction of the first sliding groove is same with the extension direction of the first screw rod, the side close to the second sliding groove of the first cross bar is recessed to form a second sliding groove, the first sliding groove is located on the side close to the second sliding groove, the extension direction of the second sliding groove is same with the extension direction of the first sliding groove, a first sliding rod is horizontally arranged between the two first cross bars, the first sliding rod is slidably provided with a first sliding block, the first sliding rod is symmetrically provided with a first electromagnet at both ends, the first sliding rod is inserted into the two second sliding grooves at both ends respectively, the side close to the second sliding groove of the first sliding block is provided with a second electromagnet, the first electromagnet and the second electromagnet are spaced to be adsorbed, so that the first sliding block moves to drive the first sliding rod to move; Each of the second accommodation cavity is provided with a third servo motor, the output shaft of the third servo motor is connected with a second screw rod, the extension direction of the second screw rod is same with the extension direction of the second cross bar, the second screw rod is threadedly engaged with a second sliding block, the second accommodation cavity is formed with a third sliding groove for the second sliding block to slide, the third sliding groove is used for preventing the second sliding block from rotating in the second accommodation cavity, the extension direction of the third sliding groove is same with the extension direction of the second screw rod, the side close to the fourth sliding groove of the second cross bar is recessed to form a fourth sliding groove, the third sliding groove is located on the side close to the fourth sliding groove, the extension direction of the fourth sliding groove is same with the extension direction of the third sliding groove, a second sliding rod is horizontally arranged between the two second cross bars, the second sliding rod is slidably provided with a second sliding block, the second sliding rod is symmetrically provided with a third electromagnet at both ends, the second sliding rod is inserted into the two fourth sliding grooves at both ends respectively, the side close to the fourth sliding groove of the second sliding block is provided with a fourth electromagnet, the third electromagnet and the fourth electromagnet are spaced to be adsorbed, so that the second sliding block moves to drive the second sliding rod to move; The first sliding rod is located above the second sliding rod, and the first sliding block is connected with the second sliding block. The moving assembly further comprises a path control module, and the path control module is used for controlling the second servo motor and the third servo motor to rotate randomly.

[0011] Preferably, the lifting assembly comprises a hydraulic cylinder fixed on the box body of the storage box, the hydraulic cylinder is connected with the rectangular frame, and the rubber scraper plate on the cylindrical cage is in contact with the bottom of the material tray when the output shaft of the hydraulic cylinder is fully extended.

[0012] Preferably, the rotating shaft is provided with a spherical cage at one end away from the connecting block, and the material tray is provided with an arc surface around the disc, and the arc of the arc surface is the same as the arc of the rotating outer edge path of the spherical cage.

[0013] Preferably, the path control module stores a plurality of different paths, and after a path is executed, any path is randomly selected from the plurality of paths; The plurality of different paths include at least three paths with different motion trajectories, specifically at least three of a circular path, an S-shaped reciprocating path, a zigzag path, and a local area covering path. The circular path is a circular motion trajectory with the center of the accommodation area of the material tray as the center. The S-shaped reciprocating path is a continuous S-shaped return motion trajectory along the length direction of the accommodation area of the material tray. The zigzag path is a motion trajectory with a plurality of zigzag lines alternately distributed along the width direction of the accommodation area of the material tray. The local area covering path is a dense covering motion trajectory for a preset local area in the accommodation area of the material tray.

[0014] Preferably, the path control module includes a path storage unit, a path execution unit, and a random selection unit. The path storage unit pre-stores motion parameter information corresponding to each path, and the motion parameter information includes motion coordinate sequence, motion speed, acceleration, and dwell time for controlling the rotation of the second servo motor and the third servo motor. The path execution unit is configured to control the rotation of the second servo motor and the third servo motor according to the motion parameter information of the current path, so as to drive the rake group to move along the current path. The random selection unit is integrated with a random number generator, and after the current path is executed, the random selection unit generates a random number through the random number generator, the random number corresponds to the plurality of paths stored in the path storage unit, and then a next path to be executed is randomly selected from the plurality of paths according to the generated random number. The path control module further includes a processing state detection unit, and the processing state detection unit is configured to detect the real-time agglomeration degree of the aluminum silver powder, and when the real-time agglomeration degree exceeds a preset threshold, the path control module controls the random selection unit to preferentially randomly select a path from the zigzag path and the local area covering path.

[0015] Process parameter closed loop control: the motion parameters (such as speed, acceleration, and dwell time) pre-stored in the path storage unit are accurately matched with the drying stage, and combined with the feedback of the temperature sensor, the full automation of the drying process can be realized, and the product consistency is improved.

[0016] In the technical solutions of the present application, since the aluminum silver powder dried by vacuum needs to be in contact with a heat source for drying, the drying thickness of the aluminum silver powder is best within 5 cm, so it needs to be carried out in a tray, and the path of the conventional material stirring device is fixed. The path is fixed, so that the material in the material tray has a stirring blind area. The present application randomly stirs the material in the material tray through the path-randomized turning rake assembly to avoid the stirring blind area caused by the fixed path Strengthen heat and mass transfer: during the stirring process, the material is constantly updated and in contact with the heating surface, combined with the low boiling point characteristics in the vacuum environment, the solvent evaporation rate is increased by 3-5 times, and the uniformity of heat transfer is significantly improved (the interlayer temperature gradient is reduced from 3-5℃ of the background technology to within 1℃).

[0017] Multi-stage solvent recovery: dry dust removal machine→wet dust removal machine→condenser→closed loop system of condensate tank, which can increase the solvent recovery rate from 85% of the background technology to more than 98%, and increase the solid content of the finished product from 98.3-98.7% to more than 99.8%, meeting the requirements of high-end applications.

[0018] Break the shell effect: through the dynamic turning rake assembly, the material is randomly stirred in a random path, which destroys the "dry shell layer" formed in the static drying, so that the inner layer solvent can quickly escape, and the drying efficiency is significantly improved (compared with the background technology, 4cm thickness needs 12-14 hours, and dynamic drying can be shortened to 3-5 hours). BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the structure of the drying tank opening of the present application; Figure 3 It is a schematic diagram of the structure of the material tray, rake group and moving assembly of the present application; Figure 4 It is a schematic diagram of the structure of the material tray and heating wire of the present application; Figure 5 It is a schematic diagram of the structure of the rake group of the present application; Figure 6 It is a schematic diagram of the internal structure of the connecting block of the present application; Figure 7 It is a schematic diagram of the structure of the moving assembly of the present application; Figure 8 A area local amplification structure schematic view in the present application Figure 7 A area local amplification structure schematic view in the present application Figure 9 B area local amplification structure schematic view in the present application Figure 10 C area local amplification structure schematic view in the present application Figure 11 D area local amplification structure schematic view in the present application

[0021] Brief Description of the Drawings: 1, drying tank; 2, storage box; 3, material tray; 4, heating wire; 5, rake group; 51, support rod; 52, connecting block; 53, first servo motor; 54, rotating shaft; 55, first bevel gear; 56, cylindrical cage; 57, second bevel gear; 58, spherical cage; 6, moving assembly; 61, first cross rod; 61a, first receiving cavity; 61b, first sliding groove; 61c, second sliding groove; 62, second cross rod; 62, second receiving cavity; 62a, second receiving cavity; 62b, third sliding groove; 62c, fourth sliding groove; 63, first sliding rod; 64, first sliding block; 65, second sliding rod; 66, second sliding block; 68, second servo motor; 69, first screw rod; 610, first sliding block; 611, second electromagnet; 612, first electromagnet; 613, third servo motor; 614, second screw rod; 615, second sliding block; 616, third electromagnet; 617, fourth electromagnet; 7, hydraulic cylinder.

[0022] The object, functional characteristics and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0024] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directionality indications also change accordingly.

[0025] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0026] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0028] The present application provides an aluminum silver powder processing equipment with a dynamic turning mechanism.

[0029] Please refer to Figures 1 to 11 The aluminum silver powder processing equipment with a dynamic turning mechanism, comprising a vacuum dryer, the vacuum dryer comprises a drying tank 1, the drying tank 1 is connected with a dry dust collector, the dry dust collector is connected with a wet dust collector, the wet dust collector is connected with a condenser, the condenser is connected with a condensate receiving tank, the condensate receiving tank is connected with a vacuum pump, the vacuum pump is connected with a steam-water separator; The drying tank 1 is provided with an open storage box 2, a plurality of through holes are formed in the storage box 2 and communicated with the drying tank 1, the opening direction of the storage box 2 is the same as that of the drying tank 1, a plurality of material drying assemblies are longitudinally and spacedly arranged in the storage box 2, the material drying assembly comprises a material tray 3 slidingly arranged in the storage box 2 and a turning mechanism 5 for turning the material in the material tray 3, the turning mechanism 5 is used for randomly turning and mixing the material in the material tray 3.

[0030] In the technical solution of the present application, since the aluminum silver powder dried by vacuum needs to be in contact with a heat source for drying, the drying thickness of the aluminum silver powder is best within 5 cm, so it needs to be carried out in a tray, and the path of the conventional material stirring device is fixed. The path is fixed, so that the material in the material tray 3 has a stirring blind area. The present application randomly stirs the material in the material tray 3 by the path-randomized turning rake group 5 to avoid the stirring blind area caused by the fixed path Strengthen heat and mass transfer: During the stirring process, the material is constantly updated and in contact with the heating surface, combined with the low boiling point characteristics in the vacuum environment, the solvent evaporation rate is increased by 3-5 times, and the uniformity of heat transfer is significantly improved (the interlayer temperature gradient is reduced from 3-5℃ of the background technology to within 1℃).

[0031] Multi-stage solvent recovery: dry dust removal machine→wet dust removal machine→condenser→closed loop system of condensate tank, which can increase the solvent recovery rate from 85% of the background technology to more than 98%, and increase the solid content of the finished product from 98.3-98.7% to more than 99.8%, meeting the requirements of high-end applications.

[0032] Break the shell effect: through the dynamic turning rake group 5 to randomly stir the material, the "dry shell layer" formed in the static drying is destroyed, so that the inner layer solvent can quickly escape, and the drying efficiency is significantly improved (compared with the background technology, 4cm thickness needs 12-14 hours, dynamic drying can be shortened to 3-5 hours).

[0033] Please refer to the attached Figures 1-2 , the material drying assembly comprises a disc support provided on the inner wall of the storage box 2 for supporting the material tray 3 and slidingly arranging the material tray 3 in the storage box 2, and a disc buckle provided on the disc support for fixing the position of the material tray 3.

[0034] Tray stability guarantee: The cooperation design of the disc support and the disc buckle ensures that the material tray 3 does not displace during the dynamic stirring process, avoids the blind area of the turning rake or the spilling of the material due to the shaking of the tray, and improves the reliability of the equipment operation.

[0035] Maintenance convenience: The sliding tray can be pulled out separately, which is convenient for cleaning and replacement, and reduces the downtime maintenance time (compared with the background technology, the maintenance efficiency is improved by 50%).

[0036] Please refer to the attached Figure 4 , a heating space is formed on the bottom plate of the material tray 3, a heating wire 4 is arranged in the heating space, a temperature sensor for detecting the temperature of the bottom of the material tray 3 is embedded on the material tray 3, a first power contact is arranged on the disc support, and a second power contact is arranged below the material tray 3 for contacting the first power contact.

[0037] Precise temperature control: The heating wire 4 is directly embedded in the bottom plate of the material tray 3, combined with real-time feedback of the temperature sensor, which can control the temperature fluctuation of the tray bottom within ±1℃, solving the problem of high oil content caused by insufficient heat transfer in the background technology (the difference in oil content between layers is reduced from 1.5-2.2% to within 0.5%).

[0038] Contactless power supply: The design of the first and second power supply contacts avoids the aging risk of traditional wire connection in a vacuum environment, while ensuring that the circuit is automatically disconnected when the tray is pulled out, improving safety.

[0039] Please refer to the attached Figure 3 , the rake group 5 includes a rake group 5, a moving assembly 6 and a lifting assembly; The rake group 5 is used for turning and mixing the material in the material tray 3; the moving assembly 6 is used to drive the rake group 5 to move within the range of the material tray 3, and the moving assembly 6 is located above the material tray 3; the lifting assembly is used to drive the material tray 3 to move towards or away from one side of the material tray 3.

[0040] Three-dimensional turning and mixing coverage: The moving assembly 6 drives the rake group 5 to move in multiple directions in the plane, and the lifting assembly adjusts the height of the rake group 5, realizing three-dimensional turning and mixing of different depth areas in the material tray 3, and completely eliminating the "dead angle" in static drying.

[0041] Dynamic adaptation to different thicknesses: By adjusting the distance between the rake group 5 and the tray bottom surface (0-5cm adjustable) through the lifting assembly, the drying thickness requirement of different batches of materials can be adapted, and the versatility of the equipment is enhanced.

[0042] Please refer to the attached Figure 3 and 5 -6, the rake group 5 includes a vertically arranged support rod 51, the lower end of the support rod 51 is connected with a hollow structure connecting block 52, the support rod 51 is provided with a first servo motor 53, the connecting block 52 is provided with a first bevel gear 55, the output shaft of the first servo motor 53 is connected with the first bevel gear 55, the connecting block 52 is symmetrically provided with a rotating shaft 54, one end of the rotating shaft 54 close to the connecting block 52 extends into the connecting block 52 and rotates with the connecting block 52, the rotating shaft 54 is horizontally arranged, one end of the rotating shaft 54 located in the connecting block 52 is provided with a second bevel gear 57 meshing with the first bevel gear 55; the rotating shaft 54 is provided with a sealing ring in sealing and rotating cooperation with the connecting block 52, the outer wall of the rotating shaft 54 is horizontally provided with a cylindrical cage 56 composed of a plurality of iron rods connected with each other, and the outer side of the cylindrical cage 56 is provided with a rubber scraper.

[0043] High efficiency and anti-adhesion: the rubber scraper outside the cylindrical cage 56 synchronously scrapes the inner wall of the tray during the mixing, preventing the aluminum powder from adhering and forming clumps, and the edge area mixing coverage is improved from 60% of the background technology to more than 95%.

[0044] Multi-angle broken agglomeration: the first servo motor 53 drives the rotating shaft 54 to rotate (the rotating speed is adjustable at 50-100 rpm), which cooperates with the transversely moving cylindrical cage 56 to effectively break the material agglomerates.

[0045] Please refer to the attached Figure 3 and 7 The moving assembly 6 comprises two first horizontal rods 61 and two second horizontal rods 62, which are transversely symmetrically arranged above the material tray 3, the extension direction of the two second horizontal rods 62 is perpendicular to the extension direction of the first horizontal rods 61, the two first horizontal rods 61 are located between the two second horizontal rods 62, and the two first horizontal rods 61 and the two second horizontal rods 62 are spliced to form a rectangular frame. A first receiving cavity 61a is formed in each first horizontal rod 61, and a second receiving cavity 62a is formed in each second horizontal rod 62. A second servo motor 68 is arranged in each first receiving cavity 61a, a first lead screw 69 is connected to the output shaft of the second servo motor 68, the extension direction of the first lead screw 69 is the same as that of the first horizontal rod 61, a first sliding block 610 is threadedly engaged on the first lead screw 69, a first sliding groove 61b for sliding the first sliding block 610 is formed in the first receiving cavity 61a, the first sliding groove 61b is used to prevent the first sliding block 610 from rotating in the first receiving cavity 61a, the extension direction of the first sliding groove 61b is the same as that of the first lead screw 69, a second sliding groove 61c is recessed on one side of each first horizontal rod 61, the first sliding groove 61b is located on the side close to the second sliding groove 61c, the extension direction of the second sliding groove 61c is the same as that of the first sliding groove 61b, a first sliding rod 63 is transversely arranged between the two first horizontal rods 61, a first sliding block 64 is slidably arranged on the first sliding rod 63, first electromagnets 612 are symmetrically arranged at the two ends of the first sliding rod 63, the first sliding rod 63 extends into the two second sliding grooves 61c at the two ends respectively, a second electromagnet 611 is arranged on the side of the first sliding block 610 close to the second sliding groove 61c, and the first electromagnets 612 and the second electromagnet 611 are spaced apart for adsorption, so that the first sliding block 610 moves to drive the first sliding rod 63 to move. A third servo motor 613 is arranged in each second accommodating cavity 62a, an output shaft of the third servo motor 613 is connected with a second screw rod 614, the extending direction of the second screw rod 614 is the same as the extending direction of the second cross rod 62, the second screw rod 614 is threadedly engaged with a second sliding block 615, a third sliding groove 62b for the sliding of the second sliding block 615 is formed in the second accommodating cavity 62a, the third sliding groove 62b is used for preventing the second sliding block 615 from rotating in the second accommodating cavity 62a, the extending direction of the third sliding groove 62b is the same as the extending direction of the second screw rod 614, fourth sliding grooves 62c are respectively recessed on one side of the two second cross rods 62 close to each other, the third sliding groove 62b is located on the side close to the fourth sliding groove 62c, the extending direction of the fourth sliding groove 62c is the same as the extending direction of the third sliding groove 62b, a second sliding rod 65 is arranged transversely between the two second cross rods 62, a second sliding block 66 is slidably arranged on the second sliding rod 65, third electromagnets 616 are symmetrically arranged at the two ends of the second sliding rod 65, the second sliding rod 65 extends into the two fourth sliding grooves 62c respectively and correspondingly, a fourth electromagnet 617 is arranged on the side of the second sliding block 615 close to the fourth sliding groove 62c, the third electromagnets 616 and the fourth electromagnet 617 are spaced to be adsorbed, so that the second sliding block 615 moves to drive the second sliding rod 65 to move; The first sliding rod 63 is located above the second sliding rod 65, and the first sliding block 64 is connected with the second sliding block 66; the second sliding block 66 is fixed at one end of the support rod 51 away from the connecting block 52; The moving assembly 6 further comprises a path control module, the path control module is used for controlling the random rotation of the second servo motor 68 and the third servo motor 613.

[0046] The interval adsorption type driving design can effectively prevent the aluminum silver powder from entering the accommodating cavity; The silver aluminum powder can be prevented from entering the first accommodating cavity 61a and the second accommodating cavity 62a, a plurality of first rolling balls are embedded in the groove bottom of the second sliding groove 61c, a plurality of second rolling balls are embedded in the groove bottom of the fourth sliding groove 62c, the first rolling balls are used for reducing the friction force between the second electromagnet 611 and the second sliding groove 61c, and the second rolling balls are used for reducing the friction force between the fourth electromagnet 617 and the fourth sliding groove 62c; Random path coverage: the path control module controls the second and third servo motors 613 to rotate randomly, so that the rake group 5 forms a random motion track in the tray, and the stirring blind area caused by the fixed path is avoided.

[0047] Please refer to the accompanying drawings Figure 1 The lifting assembly comprises a hydraulic cylinder 7 fixed on the box body of the storage box 2, the hydraulic cylinder 7 is connected with a rectangular frame, and the rubber scraper on the cylindrical cage 56 is in contact with the bottom of the material tray 3 when the output shaft of the hydraulic cylinder 7 is completely stretched out.

[0048] Hydraulic cylinder 7 drives the rake group 5 to descend to the rubber scraper to contact the tray bottom surface, which can remove the bottom material residue caused by gravity compaction in traditional static drying.

[0049] By adjusting the stroke of the hydraulic cylinder 7 (0-3cm adjustable), the turning and stirring depth can be accurately controlled to adapt to the material state at different drying stages (such as deep turning and stirring at the initial stage and loose surface at the later stage).

[0050] Please refer to the attached Figure 1 , the end of the shaft 54 away from the connecting block 52 is provided with a spherical cage 58, and the periphery of the material tray 3 is an arc surface, and the arc of the arc surface is the same as the arc of the rotating outer edge path of the spherical cage 58.

[0051] Full coverage of the edge area: the rotating outer edge path of the spherical cage 58 is consistent with the arc of the arc surface of the tray, so that the turning and stirring coverage of the material in the 2cm range of the edge of the tray is improved from 40% in the background technology to more than 90%, solving the edge blind area problem of the traditional turning device.

[0052] Reduce material loss: the fit design of the rubber scraper and the arc surface improves the utilization rate of raw materials.

[0053] Please refer to the attached Figures 1-11 , the path control module stores a plurality of different paths, and after executing one path, any one path is randomly selected from the plurality of paths; The plurality of different paths include at least three paths with different motion trajectories, specifically at least three of the following: circular path, S-shaped reciprocating path, zigzag path and local area coverage path; The circular path is a circular motion trajectory with the center of the receiving area of the material tray 3 as the center; The S-shaped reciprocating path is a continuous S-shaped return motion trajectory along the length direction of the receiving area of the material tray 3; The zigzag path is a motion trajectory with multiple zigzag lines alternately distributed along the width direction of the receiving area of the material tray 3; The local area coverage path is a dense coverage motion trajectory for the preset local area in the receiving area of the material tray 3.

[0054] The combination of the circular path (center area reinforcement), the S-shaped reciprocating path (length direction uniformization), the zigzag path (width direction dispersion) and the local area coverage path (for high oil content area) can automatically switch strategies according to the material drying stage, so as to improve the drying uniformity.

[0055] The dense turning and stirring of the local area coverage path in the high oil content area can reduce the solvent residue in the area.

[0056] Please refer to the attached drawings Figures 1-11 The path control module comprises a path storage unit, a path execution unit and a random selection unit; The path storage unit pre-stores motion parameter information corresponding to each path, and the motion parameter information comprises motion coordinate sequence, motion speed, acceleration and dwell time for controlling the rotation of the second servo motor 68 and the third servo motor 613; The path execution unit is used for controlling the rotation of the second servo motor 68 and the third servo motor 613 according to the motion parameter information of the current path, so as to drive the rake group 5 to move along the current path; The random selection unit is integrated with a random number generator, and after the current path is executed, the random selection unit generates a random number through the random number generator, the random number corresponds to a plurality of paths stored in the path storage unit one by one, and then the next path to be executed is randomly selected from the plurality of paths according to the generated random number; The path control module further comprises a processing state detection unit, and the processing state detection unit is used for detecting the real-time agglomeration degree of the aluminum silver powder. When the real-time agglomeration degree exceeds a preset threshold, the path control module controls the random selection unit to preferentially randomly select a path from the zigzag staggered path and the local area coverage path.

[0057] Intelligent adaptive adjustment: the processing state detection unit monitors the material agglomeration degree in real time, and when the agglomeration degree exceeds a threshold (such as D50> 20μm), the system automatically preferentially selects a zigzag staggered path or a local area coverage path, so that the breaking efficiency of the agglomerate is improved by more than 40%.

[0058] Process parameter closed loop control: the motion parameters (such as speed, acceleration and dwell time) pre-stored in the path storage unit are accurately matched with the drying stage, and combined with the feedback of the temperature sensor, the automatic control of the drying process can be realized, and the product consistency is improved.

[0059] The specific operation mode of the application is as follows: the opening of the drying tank 1 is opened, the storage box 2 is taken out from the drying tank 1 (the storage box 2 is in the same direction with the opening of the drying tank 1, which is convenient for loading and unloading), the material tray 3 is taken out through the sliding structure of the tray, and the aluminum silver powder containing solvent oil is loaded into the tray (the material thickness is controlled within 5cm, which meets the requirement of the best drying thickness).

[0060] Put the material tray 3 back on the tray, fix it by the tray buckle (avoid the tray displacement when stirring), ensure the second power contact under the tray accurately contacts the first power contact on the tray (provide power for the heating wire 4 and the temperature sensor). Start the vacuum pump, separate the water vapor through the steam-water separator, then gradually reach -0.09MPa in the drying tank 1; at the same time, the heating wire 4 is powered on, the aluminum silver powder is heated through the heating space of the material tray 3 bottom plate, and the temperature sensor feeds back the temperature at the bottom of the tray in real time (fluctuation control within ±1℃), to ensure uniform heating.

[0061] After the solvent volatilizes, the steam enters the drying tank 1 through the through hole of the storage box 2 in turn, then enters the dry dust collector (intercepting aluminum silver powder dust) → wet dust collector (further purifying trace dust) → condenser (solvent vapor liquefaction) → condensate tank (collecting solvent, recovery rate ≥98%) through the pipeline, to realize closed-loop recovery of the solvent.

[0062] Start the hydraulic cylinder 7 on the inner wall of the storage box 2, drive the rectangular frame (moving assembly 6) to descend, so that the rubber scraper of the rake group 5 contacts the bottom of the material tray 3; The first servo motor 53 is started, the first bevel gear 55 meshes with the second bevel gear 57, the rotating shaft 54 is driven to rotate, the cylindrical cage 56 (a plurality of iron rods are spliced) and the outer rubber scraper are driven to rotate (rotation speed 50-100rpm), to break the material agglomerates and scrape off the aluminum silver powder adhered to the inner wall of the tray; The random selection unit of the path control module selects an initial path through a random number generator, the path execution unit controls the moving assembly 6 according to the motion parameters (coordinate sequence, speed, acceleration, etc.) of the path, after the current path is executed, the random selection unit generates a random number again, and randomly selects a next path from the pre-stored paths (to avoid fixed path blind area); if the processing state detection unit detects that the agglomeration degree exceeds the threshold value, a path is preferentially selected from the zigzag staggered / local area coverage path, to ensure the uniformity of the material; When the total drying time reaches the preset value (or the detection of solvent residue ≤0.2%), stop the power supply of the heating wire 4, close the vacuum pump, and slowly introduce inert gas (such as nitrogen) into the drying tank 1 through the control valve to decompress to normal pressure.

[0063] Stop the rotation of the rake group 5 and the operation of the moving assembly 6, and the hydraulic cylinder 7 drives the rectangular frame to rise, so that the rake group 5 is separated from the material surface.

[0064] The above is only a preferred embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made under the concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. An aluminum silver powder processing apparatus with a dynamic turning mechanism, characterized by, The vacuum dryer comprises a drying tank, a dry dust collector, a wet dust collector, a condenser, a condensate receiving tank, a vacuum pump and a steam-water separator; The drying tank is provided with an open storage box, a plurality of through holes are formed in the storage box and communicated with the drying tank, the opening direction of the storage box is the same as that of the drying tank, a plurality of groups of material drying assemblies are longitudinally and spacedly arranged in the storage box, the material drying assembly comprises a material tray slidingly arranged in the storage box and a turning rake assembly for turning over the material in the material tray, and the turning rake assembly is used for randomly turning over the material in the material tray.

2. The aluminum silver powder processing apparatus with a dynamic turnover mechanism according to claim 1, characterized in that, The material drying assembly comprises a disc support arranged on the inner wall of the storage box and used for supporting the material tray and slidingly arranging the material tray in the storage box, and the disc support is provided with a disc buckle used for fixing the position of the material tray.

3. The aluminum silver powder processing apparatus with a dynamic turnover mechanism according to claim 2, characterized in that, A heating space is formed on the bottom plate of the material tray, a heating wire is arranged in the heating space, a temperature sensor is embedded on the material tray and used for detecting the temperature of the bottom plate of the material tray, a first power supply contact is arranged on the disc support, and a second power supply contact is arranged below the material tray and used for contacting the first power supply contact.

4. The aluminum silver powder processing apparatus with a dynamic turnover mechanism according to claim 1, characterized in that, The turning rake assembly comprises a rake group, a moving assembly and a lifting assembly. The rake group is used for turning over the material in the material tray, the moving assembly is used for driving the rake group to move in the range of the material tray, the moving assembly is located above the material tray, and the lifting assembly is used for driving the material tray to move towards or away from one side of the material tray.

5. The aluminum silver powder processing apparatus with a dynamic turnover mechanism according to claim 4, characterized in that, The rake group comprises a vertically arranged support rod, a hollow connecting block connected to the lower end of the support rod, a first servo motor arranged in the support rod, a first bevel gear arranged in the connecting block, an output shaft of the first servo motor connected with the first bevel gear, two shafts symmetrically arranged on the two sides of the connecting block, one end of each shaft near the connecting block extending into the connecting block and rotationally matched with the connecting block, the shafts being horizontally arranged, one end of each shaft near the connecting block being provided with a second bevel gear meshed with the first bevel gear, a sealing ring arranged in sealing and rotationally matched relationship between the shaft and the connecting block, and a cylindrical cage composed of a plurality of iron rods horizontally sleeved on the outer wall of the shaft and arranged on the outside of the cylindrical cage.

6. The aluminum silver powder processing apparatus with a dynamic turnover mechanism according to claim 4, characterized in that, The moving assembly comprises two first horizontal rods horizontally and symmetrically arranged above the material tray and two second horizontal rods horizontally and symmetrically arranged, the extending directions of the second horizontal rods being perpendicular to the extending directions of the first horizontal rods, the first horizontal rods being located between the second horizontal rods, and the first horizontal rods and the second horizontal rods being mutually spliced to form a rectangular frame. Each first horizontal rod is provided with a first receiving cavity, and each second horizontal rod is provided with a second receiving cavity. Each first accommodating cavity is internally provided with a second servo motor, an output shaft of the second servo motor is connected with a first screw rod, the extending direction of the first screw rod is same with the extending direction of the first cross rod, the first screw rod is threadedly engaged with a first sliding block, a first sliding groove is formed in the first accommodating cavity for the sliding of the first sliding block, the first sliding groove is used for preventing the first sliding block from rotating in the first accommodating cavity, the extending direction of the first sliding groove is same with the extending direction of the first screw rod, the side close to the second sliding groove of the two first cross rods is recessed to form a second sliding groove respectively, the first sliding groove is located on the side close to the second sliding groove, the extending direction of the second sliding groove is same with the extending direction of the first sliding groove, a first sliding rod is horizontally arranged between the two first cross rods, the first sliding rod is slidably provided with a first sliding block, the first sliding rod is symmetrically provided with a first electromagnet at the two ends, the two ends of the first sliding rod respectively and one by one extend into the two second sliding grooves, the side close to the second sliding groove of the first sliding block is provided with a second electromagnet, the first electromagnet and the second electromagnet are spaced to be adsorbed, so that the first sliding block moves to drive the first sliding rod to move; Each second accommodating cavity is internally provided with a third servo motor, an output shaft of the third servo motor is connected with a second screw rod, the extending direction of the second screw rod is same with the extending direction of the second cross rod, the second screw rod is threadedly engaged with a second sliding block, a third sliding groove is formed in the second accommodating cavity for the sliding of the second sliding block, the third sliding groove is used for preventing the second sliding block from rotating in the second accommodating cavity, the extending direction of the third sliding groove is same with the extending direction of the second screw rod, the side close to the fourth sliding groove of the two second cross rods is recessed to form a fourth sliding groove respectively, the third sliding groove is located on the side close to the fourth sliding groove, the extending direction of the fourth sliding groove is same with the extending direction of the third sliding groove, a second sliding rod is horizontally arranged between the two second cross rods, the second sliding rod is slidably provided with a second sliding block, the second sliding rod is symmetrically provided with a third electromagnet at the two ends, the two ends of the second sliding rod respectively and one by one extend into the two fourth sliding grooves, the side close to the fourth sliding groove of the second sliding block is provided with a fourth electromagnet, the third electromagnet and the fourth electromagnet are spaced to be adsorbed, so that the second sliding block moves to drive the second sliding rod to move; The first sliding rod is located above the second sliding rod, the first sliding block is connected with the second sliding block, and the second sliding block is fixed at the end, away from the connecting block, of the supporting rod; The moving assembly further comprises a path control module, and the path control module is used for controlling the second servo motor and the third servo motor to randomly rotate.

7. The aluminum silver powder processing apparatus with a dynamic turnover mechanism according to claim 6, characterized in that, The lifting assembly comprises a hydraulic cylinder fixed on the box body of the storage box, the hydraulic cylinder is connected with the rectangular frame, and the rubber scraper on the cylindrical cage is in contact with the bottom of the material tray after the output shaft of the hydraulic cylinder is completely extended.

8. The aluminum silver powder processing apparatus with a dynamic turnover mechanism according to claim 5, characterized in that, The end, away from the connecting block, of the rotating shaft is provided with a spherical cage, the periphery of the material tray is an arc surface, and the curvature of the arc surface is same with the curvature of the arc surface of the rotating outer edge path of the spherical cage.

9. The aluminum silver powder processing apparatus with a dynamic turnover mechanism according to claim 6, characterized in that, The path control module stores a plurality of different paths, and after a path is executed, any path is randomly selected from the plurality of paths. The multiple different paths include at least three paths with different movement trajectories, specifically at least three of a loop path, an S-shaped reciprocating path, a zigzag path and a local area covering path. The loop path is a loop movement trajectory with the center of the accommodation area of the material tray as the center. The S-shaped reciprocating path is a continuous S-shaped turning movement trajectory along the length direction of the accommodation area of the material tray. The zigzag path is a movement trajectory with multiple segments of zigzag lines alternately distributed along the width direction of the accommodation area of the material tray. The local area covering path is a dense covering movement trajectory for a preset local area in the accommodation area of the material tray.

10. The aluminum silver powder processing apparatus with a dynamic turnover mechanism according to claim 9, characterized in that, The path control module includes a path storage unit, a path execution unit and a random selection unit. The path storage unit pre-stores movement parameter information corresponding to each path, and the movement parameter information includes movement coordinate sequence, movement speed, acceleration and dwell time for controlling the rotation of the second servo motor and the third servo motor. The path execution unit is configured to control the rotation of the second servo motor and the third servo motor according to the movement parameter information of the current path, so as to drive the rake group to move along the current path. The random selection unit is integrated with a random number generator, and after the current path is executed, the random selection unit generates a random number through the random number generator, which corresponds to the multiple paths stored in the path storage unit one by one, and then selects a next path to be executed from the multiple paths according to the generated random number. The path control module further includes a processing state detection unit configured to detect the real-time agglomeration degree of the aluminum silver powder, and when the real-time agglomeration degree exceeds a preset threshold, the path control module controls the random selection unit to preferentially select a path from the zigzag path and the local area covering path.

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