Feeding equipment for automatic filtration of sand mill

Abstract

The invention relates to the technical field of sand mills, in particular to automatic filtering feeding equipment of a sand mill, which comprises a feeding cylinder, and further comprises a feeding hopper for conveying raw materials and sanded slurry to the feeding cylinder; the input pipeline is fixedly communicated with the side wall of the feeding hopper; the output pipeline is communicated with the bottom of the feeding cylinder and is used for conveying the raw materials or the slurry to the sanding cylinder; the first connecting pipe is communicated with the top of the feeding cylinder; the feeding and filtering assembly is communicated between the feeding hopper and the top of the first connecting pipe and is used for filtering the raw materials entering the first connecting pipe from the feeding hopper so as to filter and discharge particles which do not meet the sanding granularity requirement; according to the device, through the arrangement of the feeding and filtering assembly, materials can be efficiently refined to the required target particle size, and meanwhile unnecessary abrasion to grinding media and equipment due to too large particles can be avoided.

Description

Technical Field

[0001] The present invention relates to the field of sand mills, and particularly to a feeding device for automatic filtration of a sand mill. Background Art

[0002] A sand mill is a wet ultrafine grinding device that uses grinding media (such as zirconia beads, glass beads, etc.) to move at high speed in a cylinder to grind and disperse materials. Its working principle is to send materials into a grinding tank through a feeding pump. A rotor or dispersion disc installed on the main shaft rotates at high speed, imparting high-intensity kinetic energy to the grinding media, making the material particles finer and evenly dispersed. The ground material is separated from the grinding media through a separation device to obtain the final product. Sand mills are widely used in industries such as chemical engineering, ink, new energy, and pharmaceuticals, and are key equipment for ultrafine grinding and dispersion.

[0003] The raw materials of a sand mill need to be filtered mainly to remove large particle impurities and foreign objects. This step is crucial because it can effectively prevent large particles from entering the interior of the sand mill, avoid damage to components such as grinding media, stirring shafts, and dispersion discs, thereby extending the service life of the equipment. In addition, the filtered raw materials help improve the grinding efficiency and product quality, making the final product finer and more uniform, meeting the requirements of different industries for ultrafine grinding and dispersion. Summary of the Invention

[0004] The purpose of the present invention is to solve the drawbacks existing in the prior art and propose a feeding device for automatic filtration of a sand mill.

[0005] The present invention provides a feeding device for automatic filtration of a sand mill, including a feeding cylinder, and further including:

[0006] A feeding hopper for conveying raw materials and the slurry in the sand mill to the feeding cylinder;

[0007] An input pipeline fixedly connected to the side wall of the feeding hopper;

[0008] An output pipeline connected to the bottom of the feeding cylinder for conveying raw materials or slurry to the sand mill cylinder;

[0009] A first connecting pipe connected to the top of the feeding cylinder;

[0010] A feeding filtration assembly connected between the top of the feeding hopper and the first connecting pipe for filtering the raw materials entering the first connecting pipe from the feeding hopper to filter out particles that do not meet the sand grinding particle size requirements;

[0011] During the feeding process, the raw materials are conveyed into the interior of the feeding hopper. The raw materials enter the feeding and filtering assembly along the feeding hopper through the first connecting pipe. The feeding and filtering assembly filters the raw materials. Generally, it is required that the particle size of the raw material particles is less than [specific size] millimeters. Therefore, the particulate matter in the raw materials with a particle size larger than [specific size] is filtered, enabling the material to be efficiently refined to the required target particle size. At the same time, it helps to avoid unnecessary wear on the grinding medium and equipment caused by over-sized particles;

[0012] After being filtered by the feeding and filtering assembly, the raw materials enter the interior of the feeding cylinder, and then are pumped into the interior of the sand mill cylinder through the output pipe at the bottom for sanding. At the same time, a cycle is formed during the sanding process, enabling the slurry to be pumped into the interior of the feeding hopper again through the input pipe, thereby sanding the raw materials in a cycle.

[0013] Preferably, the feeding and filtering assembly includes:

[0014] A rotating cylinder, rotatably mounted on the top of the feeding cylinder through a mounting frame;

[0015] A cylindrical through groove, penetratingly opened at the top of the rotating cylinder;

[0016] A second connecting pipe, fixed to the top of the first connecting pipe and communicating with the bottom of the cylindrical through groove;

[0017] A third connecting pipe, fixed to the top of the mounting frame and communicating with the cylindrical through groove at the bottom;

[0018] Filter balls, rotatably mounted in the interior of the cylindrical through groove through a fixing frame. The raw materials enter the filter balls through the third connecting pipe from the feeding hopper for filtering;

[0019] The filter balls are installed inside the cylindrical through groove opened inside the rotating cylinder. The raw materials or slurry enter the interior of the cylindrical through groove through the third connecting pipe. When passing through the cylindrical through groove, they pass through the interior of the filter balls. The raw materials are filtered by the filter balls, and the particulate matter that does not meet the particle size requirements is filtered and intercepted. Subsequently, the raw materials or slurry that meet the particle size requirements enter the interior of the feeding cylinder along the second connecting pipe at the bottom, thereby realizing the filtration of the raw materials.

[0020] Preferably, the feeding and filtering assembly further includes:

[0021] A plurality of the cylindrical through grooves and the filter balls inside are provided, and are arranged in a circumferential array;

[0022] A blanking pipe, fixed to the bottom of the mounting frame and communicating with one of the cylindrical through grooves;

[0023] A commutation mechanism, installed on the mounting frame, for driving the rotating cylinder to rotate for commutation of the cylindrical through grooves;

[0024] The blanking driving mechanism is installed between the filtering ball and the mounting frame and is used to drive the filtering ball to rotate for blanking.

[0025] By providing a plurality of cylindrical through grooves, a plurality of filtering balls are also provided inside the cylindrical through grooves. After a filtering ball has been used for a period of time, a certain amount of particulate matter has been filtered inside the filtering ball. At this time, the transposition mechanism is activated. The transposition mechanism drives the rotating cylinder to rotate, and the rotating cylinder drives the cylindrical through grooves and the filtering balls inside to rotate for transposition. As a result, the cylindrical through groove that is currently located at the top of the second connecting pipe and is connected to it is switched to the top of the blanking pipeline and connected to it, so that a new cylindrical through groove and the filtering ball inside are switched to the top of the second connecting pipe and connected to it, thus realizing the replacement of the filtering ball, which is beneficial to maintaining the filtering effect of the filtering ball. After the filtering ball with particulate matter accumulated inside moves and is switched to the top of the blanking pipeline, and the blanking driving mechanism drives the filtering ball to rotate. After the filtering ball rotates, the round opening at the top faces downward, so that the filtered particulate matter inside falls downward into the blanking pipeline and is collected by an externally provided collection box along the blanking pipeline, thereby realizing the recovery of the filtered particulate matter, enabling the staff to grind the recovered particulate matter again until the particle size meets the requirements and then being able to input it into the feed cylinder again for feeding.

[0026] Preferably, the transposition mechanism includes:

[0027] A first gear fixed on the outer wall of the rotating cylinder;

[0028] A first motor fixed on the top of the mounting frame;

[0029] A second gear fixed on the output shaft of the first motor, and the first motor meshes with the first gear;

[0030] After the first motor is started, it drives the second gear connected to its output shaft to rotate. After the second gear rotates, it drives the first gear meshing with it to rotate, and the first gear drives the rotating cylinder to rotate, thereby realizing the switching of the cylindrical through grooves inside the rotating cylinder.

[0031] Preferably, the feed filtering assembly further includes:

[0032] A communication pipeline fixed to the bottom of the mounting frame. The top of the communication pipeline communicates with the bottom of one of the cylindrical through grooves, and the bottom of the communication pipeline communicates with the second connecting pipe;

[0033] By setting up a connecting pipe, when the filtering ball switches positions, it first switches to the top connection of the connecting pipe. When the filtering ball is located above the connecting pipe for connection, no new raw materials enter. At this time, the original raw materials continue to be filtered, so that the raw materials inside the filtering ball are fully filtered, which helps to avoid the situation where some raw materials that meet the particle size requirements are mixed into the filtered and recycled raw materials.

[0034] Preferably, the blanking driving mechanism includes:

[0035] A rotating pipe, fixed on the side wall of the filtering ball and penetrating through the rotating cylinder;

[0036] A first half gear, fixed on the outer wall of the rotating pipe through a second fixing plate;

[0037] A second motor, fixedly installed on the mounting frame. A second half gear is fixed on the output shaft of the second motor, and the second half gear is meshed and matched with the first half gear;

[0038] A first fixing plate, fixed on the side wall of the rotating cylinder;

[0039] A spring, fixed between the first fixing plate and the second fixing plate;

[0040] After the second motor rotates, it drives the second half gear connected to it to rotate. The second half gear is meshed and matched with the first half gear. When the second half gear rotates to the tooth position of the first half gear, it meshes with the first half gear, thereby driving the first half gear to rotate. When the tooth position of the first half gear rotates out of the tooth position of the second half gear, the second half gear no longer drives the first half gear. At this time, the first half gear resets under the elastic action of the spring, thereby realizing the reciprocating drive of the rotating pipe, so that the rotating pipe drives the filtering ball to vibrate to promote the filtration of the raw materials inside the filtering ball;

[0041] At the position corresponding to one side of the blanking pipeline, the second half gear is a complete gear. At this time, the rotation of the second half gear drives the first half gear to rotate, so that the first half gear continuously rotates half a circle, thereby driving the filtering ball to rotate half a circle so that the round opening faces downward to pour out the internal particulate matter, thereby realizing the dumping of the particulate matter and enabling the particulate matter to be discharged along the blanking pipeline.

[0042] Preferably, it further includes:

[0043] A fixed cylinder, fixed on the top of the third connecting pipe and fixedly connected to the feed hopper at the top;

[0044] A spiral pipeline, arranged inside the fixed cylinder;

[0045] The circular plate is rotatably installed at the inner top of the fixed cylinder, and the tops of the spiral pipes all penetrate through and are fixed to the circular plate;

[0046] The first opening is penetratingly formed at the top of the fixed cylinder and communicates with the feed hopper;

[0047] The second opening is penetratingly formed at the bottom of the fixed cylinder and communicates with the third connecting pipe;

[0048] The magnetic mechanism is installed inside the spiral pipe and is used to separate metal particles in the raw materials through magnetic attraction force;

[0049] The raw materials enter the inside of the spiral pipe through the first opening from the feed hopper, so that the raw materials pass through the inside of the spiral pipe. The magnetic mechanism is arranged inside the spiral pipe, so that when the raw materials pass through the inside of the spiral pipe, they are dispersed under the action of the magnetic mechanism. The metal in the dispersed raw materials is adsorbed by the magnetic mechanism, so as to remain inside the spiral pipe, while the raw materials pass through the spiral pipe and enter the inside of the third connecting pipe through the second opening, thereby realizing the metal filtration of the raw materials.

[0050] Preferably, the magnetic mechanism includes:

[0051] Two first power-on interfaces are symmetrically fixed on the outer wall of the spiral pipe;

[0052] A plurality of electromagnets are all fixed between the two first power-on interfaces and penetrate through the spiral pipe and part of them are located inside the spiral pipe;

[0053] Two second power-on interfaces are symmetrically fixed on the top of the fixed cylinder and are adapted to the first power-on interfaces;

[0054] When the second power-on interface is aligned and connected with the first power-on interface, the electromagnets are powered on. After the electromagnets are powered on, they generate magnetism. Part of the structure of the electromagnets is arranged inside the spiral pipe, so that when the raw materials pass through the inside of the spiral pipe, the metal impurities in the raw materials are adsorbed, thereby filtering the metal impurities.

[0055] Preferably, the magnetic mechanism further includes:

[0056] There are two spiral pipes, which are arranged in a circumferential array. The two spiral pipes are also provided with electromagnets and first power-on interfaces in the same way;

[0057] The fourth gear is fixed to the bottom of the spiral pipe;

[0058] The third motor is fixed to the top of the mounting frame, and a fifth gear is fixed to the output shaft. The fifth gear meshes with the third motor;

[0059] After the third motor starts, it drives the fifth gear to rotate. The fifth gear drives the fourth gear to rotate, and the fourth gear drives the two spiral pipes to rotate and switch, so as to realize the replacement and use of the two spiral pipes. When there are too many metal impurities inside one spiral pipe and it affects the passage of raw materials, the other spiral pipe is replaced for use.

[0060] Preferably, it further includes:

[0061] An output cylinder, fixed to the bottom of the fixed cylinder;

[0062] A third opening, penetrating through the bottom of the fixed cylinder and communicating with the output cylinder;

[0063] There is only one set of second power-on interfaces. When the spiral pipes rotate and change positions, the first power-on interfaces on the spiral pipes after the position change are no longer connected to the second power-on interfaces, so that the electromagnets lose magnetic force, and the metal impurities inside the spiral pipes fall along the spiral pipes and enter the inside of the output cylinder through the third opening, so that the two spiral pipes can be used alternately in a reciprocating manner.

[0064] Compared with the prior art, the present invention has the following beneficial effects:

[0065] Through the setting of the feeding and filtering assembly, the present invention enables the material to be efficiently refined to the required target particle size, and at the same time helps to avoid unnecessary wear on the grinding medium and equipment due to too large particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0067] Figure 2 It is a schematic diagram of the structure of the feeding and filtering assembly of the present invention after sectioning Figure 1 .

[0068] Figure 3 It is of the present invention Figure 2 The enlarged schematic diagram of the structure at A in

[0069] Figure 4 It is of the present invention Figure 2 The enlarged schematic diagram of the structure at B in

[0070] Figure 5 It is of the present invention Figure 2 The enlarged schematic diagram of the structure at C in

[0071] Figure 6 It is a schematic diagram of the structure of the feeding and filtering assembly of the present invention after sectioning Figure 2 .

[0072] Figure 7 It is of the present invention Figure 6Schematic diagram of the enlarged structure at D in the [Chinese context].

[0073] Figure 8 Schematic diagram of the structure of the spiral pipeline of the present invention.

[0074] In the figure: 1, feeding cylinder; 101, input pipeline; 102, output pipeline; 103, first connecting pipe; 2, rotating cylinder; 201, second connecting pipe; 202, third connecting pipe; 203, cylindrical through groove; 204, filtering ball; 205, fixing bracket; 3, first gear; 301, second gear; 302, first motor; 4, blanking pipeline; 5, communicating pipeline; 6, rotating pipe; 601, first half gear; 602, second half gear; 603, second motor; 604, first fixing plate; 605, second fixing plate; 606, spring; 7, fixing cylinder; 701, spiral pipeline; 702, round plate; 703, feeding hopper; 704, first opening; 705, second opening; 8, fourth gear; 801, fifth gear; 802, third motor; 9, first power-on interface; 901, electromagnet; 902, second power-on interface; 10, output cylinder; 1001, third opening. Detailed implementation manners

[0075] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0076] As Figures 1 to 8 shown, a feeding device for automatic filtration of a sand mill includes a feeding cylinder 1, and further includes:

[0077] A feeding hopper 703 for conveying raw materials and the slurry during sand grinding to the feeding cylinder 1;

[0078] An input pipeline 101 fixedly connected to the side wall of the feeding hopper 703;

[0079] An output pipeline 102 connected to the bottom of the feeding cylinder 1 for conveying raw materials or slurry to the sand grinding cylinder;

[0080] A first connecting pipe 103 connected to the top of the feeding cylinder 1;

[0081] A feeding filtration assembly connected between the top of the feeding hopper 703 and the first connecting pipe 103 for filtering the raw materials entering the first connecting pipe 103 from the feeding hopper 703 to filter out the particles that do not meet the sand grinding particle size requirements;

[0082] The raw materials of the sand mill need to be filtered, mainly to remove large particle impurities and foreign objects therein. This step is crucial because it can effectively prevent large particles from entering the interior of the sand mill, avoid damage to components such as grinding media, stirring shafts, and dispersion discs, thereby extending the service life of the equipment. In addition, the filtered raw materials contribute to improving the grinding efficiency and product quality, making the final product more delicate and uniform, meeting the requirements of ultra-fine grinding and dispersion in different industries;

[0083] This embodiment of the present invention can solve the above problems. The specific implementation method is as follows. During the feeding process, the raw materials are conveyed into the interior of the feeding hopper 703. The raw materials enter the feeding and filtering assembly along the feeding hopper 703 through the first connecting pipe 103. The feeding and filtering assembly filters the raw materials. Generally, it is required that the particle size of the raw material particles is less than 80 mesh (less than 0.18 mm). Therefore, the particles in the raw materials with a particle size greater than 80 mesh are filtered, so that the material can be efficiently refined to the required target particle size, and at the same time, it is beneficial to avoid unnecessary wear on the grinding media and equipment due to too large particles;

[0084] After being filtered by the feeding and filtering assembly, the raw materials enter the interior of the feeding cylinder 1, and then are pumped into the interior of the sand mill cylinder through the output pipe 102 at the bottom for sanding. At the same time, a cycle is formed during the sanding process, so that the slurry can be pumped into the interior of the feeding hopper 703 again through the input pipe 101, thereby sanding the raw materials in a cycle.

[0085] As an optional embodiment, the feeding and filtering assembly includes:

[0086] A rotating cylinder 2, rotatably installed on the top of the feeding cylinder 1 through a mounting frame;

[0087] A cylindrical through groove 203, penetratingly opened on the top of the rotating cylinder 2;

[0088] A second connecting pipe 201, fixed to the top of the first connecting pipe 103 and communicating with the bottom of the cylindrical through groove 203;

[0089] A third connecting pipe 202, fixed to the top of the mounting frame and communicating with the bottom of the cylindrical through groove 203;

[0090] A filtering ball 204, rotatably installed in the cylindrical through groove 203 through a fixing frame 205. The raw materials enter the filtering ball 204 through the third connecting pipe 202 from the feeding hopper 703 for filtering;

[0091] The filtering ball 204 is installed inside the cylindrical through groove 203 opened inside the rotating cylinder 2. The raw material or slurry enters the inside of the cylindrical through groove 203 through the third connecting pipe 202. When passing through the cylindrical through groove 203, it passes through the inside of the filtering ball 204. The raw material is filtered by the filtering ball 204, and the particulate matter that does not meet the particle size requirements is filtered and intercepted. Subsequently, the raw material or slurry that meets the particle size requirements enters the inside of the feeding cylinder 1 along the second connecting pipe 201 at the bottom, thereby realizing the filtration of the raw material.

[0092] As an alternative embodiment, the feeding and filtering assembly further includes:

[0093] There are multiple cylindrical through grooves 203 and the filtering balls 204 inside, and they are arranged in a circumferential array;

[0094] The blanking pipeline 4 is fixed to the bottom of the mounting frame and communicates with the cylindrical through groove 203 at one position;

[0095] The position-changing mechanism is installed on the mounting frame and is used to drive the rotating cylinder 2 to rotate for the position change of the cylindrical through groove 203;

[0096] The blanking driving mechanism is installed between the filtering ball 204 and the mounting frame and is used to drive the filtering ball 204 to rotate for blanking;

[0097] Since there may be a large amount of particles in the raw material that do not meet the requirements, when the raw material is filtered by the filtering ball 204 at this time, a large amount of particulate matter remains inside the filtering ball 204, which will cause the inside of the filtering ball 204 to be blocked by the particulate matter, resulting in a weakened filtering effect of the filtering ball 204 or even being blocked, causing the raw material to not pass through;

[0098] This embodiment of the present invention can solve the above problems. The specific implementation is as follows. By providing a plurality of cylindrical through grooves 203, a plurality of filter balls 204 are also provided inside the cylindrical through grooves 203. After a filter ball 204 has been used for a period of time, a certain amount of particulate matter has been filtered inside the filter ball 204. At this time, the position-changing mechanism is activated. The position-changing mechanism drives the rotating cylinder 2 to rotate. The rotating cylinder 2 drives the cylindrical through grooves 203 and the filter balls 204 inside to rotate and change positions. As a result, the cylindrical through groove 203 currently located at the top of the second connecting pipe 201 and communicating with it is switched to the top of the blanking pipe 4 and communicates with it. Thus, a new cylindrical through groove and the filter ball 204 inside are switched to the top of the second connecting pipe 201 and communicate with it, thereby realizing the replacement of the filter ball 204, which is beneficial to maintaining the filtering effect of the filter ball 204. After the filter ball 204 with particulate matter accumulated inside is moved and switched to the top of the blanking pipe 4, and the blanking driving mechanism is activated. The blanking driving mechanism drives the filter ball 204 to rotate. After the filter ball 204 rotates, the round opening at the top faces downward, causing the filtered particulate matter inside to fall downward into the blanking pipe 4 and be collected by an external collection box along the blanking pipe 4, thereby realizing the recovery of the filtered particulate matter, enabling the staff to grind the recovered particulate matter again until the particle size meets the requirements and then input it into the feeding cylinder 1 again for feeding.

[0099] As an alternative embodiment, the position-changing mechanism includes:

[0100] A first gear 3, fixed on the outer wall of the rotating cylinder 2;

[0101] A first motor 302, fixed on the top of the mounting frame;

[0102] A second gear 301, fixed on the output shaft of the first motor 302, and the first motor 302 meshes with the first gear 3;

[0103] After the first motor 302 is started, it drives the second gear 301 connected to its output shaft to rotate. After the second gear 301 rotates, it drives the first gear 3 meshing with it to rotate. The first gear 3 drives the rotating cylinder 2 to rotate, thereby realizing the switching of the cylindrical through grooves 203 inside the rotating cylinder 2.

[0104] As an alternative embodiment, the feeding and filtering assembly further includes:

[0105] A connecting pipe 5, fixed on the bottom of the mounting frame. The top of the connecting pipe 5 communicates with the bottom of one of the cylindrical through grooves 203, and the bottom of the connecting pipe 5 communicates with the second connecting pipe 201;

[0106] When the cylindrical through groove 203 connected to the bottom of the third connecting pipe 202 filters the raw materials, the raw materials are continuously conveyed into the interior of the filtering ball 204. At this time, when the filtering ball 204 is switched with the rotating cylinder 2, there is still some raw material that meets the particle size requirements remaining inside the filtering ball 204 and not being screened and dropped. This will cause some raw materials that meet the particle size requirements to be mixed into the filtered and recycled raw materials;

[0107] This embodiment of the present invention can solve the above problems. The specific implementation method is as follows. By setting the connecting pipe 5, when the filtering ball 204 switches positions, it first switches to be connected to the top of the connecting pipe 5. When the filtering ball 204 is connected above the connecting pipe 5, no new raw materials enter. At this time, the original raw materials continue to be filtered, so that the raw materials inside the filtering ball 204 are fully filtered, which is conducive to avoiding the situation where some raw materials that meet the particle size requirements are mixed into the filtered and recycled raw materials.

[0108] As an alternative embodiment, the blanking driving mechanism includes:

[0109] A rotating pipe 6, fixed on the side wall of the filtering ball 204 and passing through the rotating cylinder 2;

[0110] A first half gear 601, fixed on the outer wall of the rotating pipe 6 through a second fixing plate 605;

[0111] A second motor 603, fixedly installed on the mounting frame. A second half gear 602 is fixed to the output shaft of the second motor 603, and the second half gear 602 is meshed and matched with the first half gear 601;

[0112] A first fixing plate 604, fixed on the side wall of the rotating cylinder 2;

[0113] A spring 606, fixed between the first fixing plate 604 and the second fixing plate 605;

[0114] After the second motor 603 rotates, it drives the second half gear 602 connected thereto to rotate. The second half gear 602 is meshed and matched with the first half gear 601. When the second half gear 602 rotates to the tooth position of the first half gear 601, it meshes with the first half gear 601, thereby driving the first half gear 601 to rotate. When the tooth position of the first half gear 601 rotates out of the tooth position of the second half gear 602, the second half gear 602 no longer drives the first half gear 601. At this time, the first half gear 601 is reset under the elastic action of the spring 606, thereby realizing the reciprocating drive of the rotating pipe 6, so that the rotating pipe 6 drives the filtering ball 204 to vibrate, so as to promote the filtering of the raw materials inside the filtering ball 204;

[0115] At a position corresponding to one side of the blanking pipeline 4, the second half gear 602 is a complete gear. At this time, the rotation of the second half gear 602 drives the rotation of the first half gear 601, causing the first half gear 601 to continuously rotate half a turn, thereby driving the filter ball 204 to rotate half a turn so that the round opening faces downward, in order to pour out the internal particulate matter, thereby realizing the dumping of the particulate matter, and enabling the particulate matter to be discharged along the blanking pipeline 4.

[0116] As an alternative embodiment, it further includes:

[0117] A fixed cylinder 7, fixed to the top of the third connecting pipe 202, and the top is fixedly connected to the feed hopper 703;

[0118] A spiral pipeline 701, arranged inside the fixed cylinder 7;

[0119] A circular plate 702, rotatably installed at the inner top of the fixed cylinder 7, and the top of the spiral pipeline 701 penetrates through and is fixed to the circular plate 702;

[0120] A first opening 704, penetratingly opened at the top of the fixed cylinder 7 and communicating with the feed hopper 703;

[0121] A second opening 705, penetratingly opened at the bottom of the fixed cylinder 7 and communicating with the third connecting pipe 202;

[0122] A magnetic mechanism, installed inside the spiral pipeline 701, for separating metal particles in the raw material through magnetic attraction;

[0123] There may be some metal impurities in the raw material for sand grinding. The metal impurities may come from the production process of the raw material itself, such as iron, copper and other metal particles mixed in during ore mining and smelting processes, or may also be metal particles brought in due to equipment wear or external mixing during the storage and transportation of the raw material. After the metal impurities enter the sand mill, they will not only affect the purity and quality of the product, but may also cause wear to the grinding medium and equipment components of the sand mill, reducing the service life of the equipment.

[0124] This embodiment of the present invention can solve the above problems. The specific implementation method is as follows. The raw material enters the inside of the spiral pipeline 701 through the first opening 704 from the feed hopper 703, so that the raw material passes through the inside of the spiral pipeline 701. The magnetic mechanism is arranged inside the spiral pipeline 701, so that when the raw material passes through the inside of the spiral pipeline 701, it is dispersed under the action of the magnetic mechanism. The metal in the dispersed raw material is adsorbed by the magnetic mechanism, thus remaining inside the spiral pipeline 701, while the raw material passes through the spiral pipeline 701 and enters the inside of the third connecting pipe 202 through the second opening 705, thereby realizing the metal filtration of the raw material.

[0125] As an alternative embodiment, the magnetic mechanism includes:

[0126] Two first power-on interfaces 9 are symmetrically fixed on the outer wall of the spiral pipe 701;

[0127] A plurality of electromagnets 901 are all fixed between the two first power-on interfaces 9 and penetrate through the spiral pipe 701 and part of them are located inside the spiral pipe 701;

[0128] Two second power-on interfaces 902 are symmetrically fixed on the top of the fixed cylinder 7 and are adapted to the first power-on interfaces 9;

[0129] When the second power-on interface 902 is aligned and connected with the first power-on interface 9, the electromagnet 901 is powered on. After the electromagnet 901 is powered on, it generates magnetism. Part of the structure of the electromagnet 901 is arranged inside the spiral pipe 701. Therefore, when the raw material passes through the inside of the spiral pipe 701, the metal impurities in the raw material are adsorbed, thereby filtering the metal impurities.

[0130] As an alternative embodiment, the magnetic mechanism further includes:

[0131] There are two spiral pipes 701, which are arranged in a circular array. The electromagnets 901 and the first power-on interfaces 9 are also arranged on both of the two spiral pipes 701;

[0132] The fourth gear 8 is fixed to the bottom of the spiral pipe 701;

[0133] The third motor 802 is fixed to the top of the mounting frame, and a fifth gear 801 is fixed to the output shaft. The fifth gear 801 meshes with the third motor 802;

[0134] After the third motor 802 is started, it drives the fifth gear 801 to rotate. The fifth gear 801 drives the fourth gear 8 to rotate. The fourth gear 8 drives the two spiral pipes 701 to rotate and switch, so as to realize the replacement and use of the two spiral pipes 701. When the metal impurities in one spiral pipe 701 are too many and affect the passage of the raw material, another spiral pipe 701 is replaced for use.

[0135] As an alternative embodiment, it further includes:

[0136] The output cylinder 10 is fixed to the bottom of the fixed cylinder 7;

[0137] The third opening 1001 penetrates through the bottom of the fixed cylinder 7 and communicates with the output cylinder 10;

[0138] The second power-on interface 902 is only provided with a single set, such that when the spiral pipe 701 rotates and changes position, the first power-on interface 9 on the spiral pipe 701 after the position change is no longer connected to the second power-on interface 902, thereby causing the electromagnet 901 to lose its magnetic force, enabling the metal impurities inside the spiral pipe 701 to fall along the spiral pipe 701 and enter the interior of the output cylinder 10 through the third opening 1001, so that the two spiral pipes 701 can be used alternately in a reciprocating manner.

[0139] Working principle of the present invention: During the feeding process, raw materials are conveyed into the interior of the feeding hopper 703, and the raw materials enter the feeding filtration assembly along the feeding hopper 703 through the first connecting pipe 103. The feeding filtration assembly filters the raw materials. Generally, it is required that the particle size of the raw material particles is less than 80 mesh and less than 0.18 mm. Therefore, the particulate matter in the raw materials with a particle size greater than 80 mesh is filtered, enabling the material to be efficiently refined to the required target particle size, and at the same time facilitating the avoidance of unnecessary wear on the grinding medium and equipment due to overly large particles.

[0140] After being filtered by the feeding filtration assembly, the raw materials enter the interior of the feeding cylinder 1, and then are pumped into the interior of the sanding cylinder through the output pipe 102 at the bottom for sanding. At the same time, a cycle is formed during the sanding process, enabling the slurry to be pumped into the interior of the feeding hopper 703 again through the input pipe 101, thereby cyclically sanding the raw materials.

[0141] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A feeding device for automatic filtration of a sand mill, comprising a feeding cylinder (1), characterized in that, Further comprising: A feed hopper (703) for conveying raw materials and the slurry during sand grinding to the feed cylinder (1); An input pipeline (101) fixedly connected to the side wall of the feed hopper (703); An output pipeline (102) connected to the bottom of the feed cylinder (1) for conveying raw materials or slurry to the sand grinding cylinder; A first connecting pipe (103) connected to the top of the feed cylinder (1); A feed filtration assembly connected between the top of the feed hopper (703) and the first connecting pipe (103) for filtering the raw materials entering the first connecting pipe (103) from the feed hopper (703) to filter out the particles that do not meet the sand grinding particle size requirements.

2. The feeding device for automatic filtration of a sand mill according to claim 1, characterized in that, The feed filtration assembly includes: A rotating cylinder (2) rotatably mounted on the top of the feed cylinder (1) through a mounting frame; A cylindrical through groove (203) penetrating through the top of the rotating cylinder (2); A second connecting pipe (201) fixed to the top of the first connecting pipe (103) and communicating with the bottom of the cylindrical through groove (203); A third connecting pipe (202) fixed to the top of the mounting frame and having its bottom communicating with the cylindrical through groove (203); Filter balls (204) rotatably mounted inside the cylindrical through groove (203) through a fixing frame (205), and the raw materials enter the filter balls (204) from the feed hopper (703) through the third connecting pipe (202) for filtering.

3. The feeding device for automatic filtration of a sand mill according to claim 2, characterized in that, The feed filtration assembly further includes: A plurality of the cylindrical through grooves (203) and the filter balls (204) inside are provided and arranged in a circumferential array; A blanking pipeline (4) fixed to the bottom of the mounting frame and communicating with the cylindrical through groove (203) at one position; A position changing mechanism mounted on the mounting frame for driving the rotating cylinder (2) to rotate for changing the positions of the cylindrical through grooves (203); A blanking driving mechanism mounted between the filter balls (204) and the mounting frame for driving the filter balls (204) to rotate for blanking.

4. The feeding device for automatic filtration of a sand mill according to claim 3, characterized in that, The position changing mechanism includes: A first gear (3) fixed to the outer wall of the rotating cylinder (2); A first motor (302) fixed to the top of the mounting frame; A second gear (301) fixed to the output shaft of the first motor (302), and the first motor (302) is engaged with the first gear (3).

5. The feeding device for automatic filtration of a sand mill according to claim 3, characterized in that, The feed filtration assembly further includes: A communicating pipeline (5) fixed to the bottom of the mounting frame, the top of the communicating pipeline (5) communicating with the bottom of the cylindrical through groove (203) at one position, and the bottom of the communicating pipeline (5) communicating with the second connecting pipe (201).

6. The feeding device for automatic filtration of a sand mill according to claim 3, characterized in that, The blanking driving mechanism includes: A rotating pipe (6) fixed to the side wall of the filter ball (204) and penetrating through the rotating cylinder (2); A first half gear (601) fixed to the outer wall of the rotating pipe (6) through a second fixing plate (605); The second motor (603) is fixedly installed on the mounting bracket. A second half gear (602) is fixed to the output shaft of the second motor (603), and the second half gear (602) is meshed and matched with the first half gear (601); The first fixing plate (604) is fixed to the side wall of the rotating cylinder (2); The spring (606) is fixed between the first fixing plate (604) and the second fixing plate (605).

7. The feeding device for automatic filtration of a sand mill according to claim 2, characterized in that, It further includes: The fixed cylinder (7) is fixed to the top of the third connecting pipe (202), and its top is fixedly connected to the feed hopper (703); The spiral pipe (701) is arranged inside the fixed cylinder (7); The circular plate (702) is rotatably installed at the inner top of the fixed cylinder (7), and the top of the spiral pipe (701) penetrates through the circular plate (702) and is fixed thereto; The first opening (704) is penetrated and opened at the top of the fixed cylinder (7) and communicates with the feed hopper (703); The second opening (705) is penetrated and opened at the bottom of the fixed cylinder (7) and communicates with the third connecting pipe (202); The magnetic mechanism is installed inside the spiral pipe (701) and is used to separate metal particles in the raw materials through magnetic attraction.

8. The feeding device for automatic filtration of a sand mill according to claim 7, wherein, The magnetic mechanism includes: Two first power supply interfaces (9) are symmetrically fixed on the outer wall of the spiral pipe (701); A plurality of electromagnets (901) are all fixed between the two first power supply interfaces (9), and the part penetrating through the spiral pipe (701) is located inside the spiral pipe (701); Two second power supply interfaces (902) are symmetrically fixed on the top of the fixed cylinder (7) and are adapted to the first power supply interfaces (9).

9. The feeding device for automatic filtration of a sand mill according to claim 8, characterized in that, The magnetic mechanism further includes: There are two spiral pipes (701), which are arranged in a circumferential array. The electromagnets (901) and the first power supply interfaces (9) are also arranged on the two spiral pipes (701); The fourth gear (8) is fixed to the bottom of the spiral pipe (701); The third motor (802) is fixed to the top of the mounting bracket, and a fifth gear (801) is fixed to its output shaft. The fifth gear (801) is meshed with the third motor (802).

10. The feeding device for automatic filtration of a sand mill according to claim 9, characterized in that It further includes: The output cylinder (10) is fixed to the bottom of the fixed cylinder (7); The third opening (1001) is penetrated and opened at the bottom of the fixed cylinder (7) and communicates with the output cylinder (10).

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