Powder sieving equipment

Abstract

The invention relates to the technical field of powder sieving, in particular to powder sieving equipment. The powder screening equipment comprises a grinding disc, a screening disc set, a vibration mechanism, a multi-axis mechanical arm and a grinding assembly. The screening disc group is connected to the lower end of the grinding disc; the vibrating mechanism is connected to the lower end of the screening disc group; the free end of the multi-axis mechanical arm is connected with the grinding assembly and used for driving the grinding assembly to change the position in the space. The grinding assembly is used for grinding materials on the grinding disc under the condition that the grinding assembly moves into the grinding disc; wherein a waste opening is formed in the periphery of the grinding disc; and a discharge hole is formed in the periphery of the screening disc group. According to the powder screening equipment, the grinding and screening quality of powder can be improved, meanwhile, the automation degree of the powder screening equipment can be improved, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of powder sieving, and more particularly, to a powder sieving device. Background Art

[0002] In modern industry, the production of powders occupies an important position, and the sieving process is crucial for ensuring the quality of powders. The traditional sieving of ammonium perchlorate powders mainly relies on manual labor, which is inefficient and has unstable precision, unable to meet the requirements of large-scale production. Moreover, some existing ammonium perchlorate powder sieving devices still have limitations such as low automation, unsatisfactory sieving precision, or poor stability, making it difficult to adapt to the requirements of high-quality production. Summary of the Invention

[0003] The objectives of the present invention include providing a powder sieving device that can improve the grinding and sieving quality of powders, while enhancing its automation level and production efficiency.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] The present invention provides a powder sieving device, which includes a grinding disk, a sieving disk group, a vibration mechanism, a multi-axis robotic arm, and a grinding assembly;

[0006] The sieving disk group is connected to the lower end of the grinding disk, and the vibration mechanism is connected to the lower end of the sieving disk group;

[0007] The free end of the multi-axis robotic arm is connected to the grinding assembly and is used to drive the grinding assembly to change positions in space; the grinding assembly is used to grind the materials on the grinding disk when it moves into the grinding disk.

[0008] Among them, a waste outlet is arranged on the outer periphery of the grinding disk; an outlet is arranged on the outer periphery of the sieving disk group.

[0009] In an alternative embodiment, a grinding mesh is provided inside the grinding disk, and the grinding mesh is located above the sieving disk group. The grinding assembly is used to grind the materials inside the grinding mesh;

[0010] Among them, the sieving disk group is used to receive the powdered materials passing through the grinding mesh; the waste outlet is used to discharge the materials that fail to pass through the grinding mesh.

[0011] In an alternative embodiment, the sieving disk group includes a first sieving disk and a second sieving disk;

[0012] The grinding disk is connected to the first sieving disk. The first sieving disk is located directly below the grinding mesh and is used to receive the powdered materials passing through the grinding mesh;

[0013] The first sieving disk is connected to the second sieving disk. The second sieving disk is located directly below the first sieving disk and is used to receive the powdered materials passing through the first sieving disk;

[0014] Wherein, the discharge port is arranged on the outer periphery of the second screening disk.

[0015] In an optional embodiment, the first screening disc is provided with a plurality of annular sealing protection strips, which are all arranged around the axis of the first screening disc, and the diameters of the plurality of annular sealing protection strips gradually increase, and an annular screening zone is enclosed between any two adjacent annular sealing protection strips; and a plurality of discharge holes are opened in each annular screening zone around the axis of the first screening disc toward the direction of the second screening disc;

[0016] Among them, each annular screening area is equipped with at least one screening-assisting bouncing ball.

[0017] In an optional embodiment, the vibration mechanism includes a vibration disc frame, a vibration disc, a vibration motor and a vibration sensor;

[0018] The vibrating disc is connected to the vibrating disc frame through a plurality of vibration buffer elastic parts, and the vibration motor is connected to the vibrating disc; the second screening disc is connected to the vibrating disc; and the vibration sensor is connected to the vibrating disc.

[0019] In an optional embodiment, the grinding assembly includes a grinding mounting plate, a first drive unit, a rotating spindle, a mounting block, a plurality of scrapers, and a plurality of grinding rods;

[0020] The first driving unit and the rotating spindle are connected to the grinding mounting plate, and the first driving unit is used to drive the rotating spindle to rotate; the mounting block is connected to one end of the rotating spindle away from the grinding mounting plate; a plurality of scrapers and a plurality of grinding rods are connected to the mounting block at intervals around the axis direction of the rotating spindle;

[0021] Wherein, the free end of the multi-axis mechanical arm is connected to the grinding mounting plate.

[0022] In an optional embodiment, the mounting block includes a mounting shell, a mounting platform, and a plurality of second drive units;

[0023] The mounting platform is placed in the mounting shell, and the mounting platform is connected to the rotating main shaft, and the plurality of second driving units are all connected to the mounting platform;

[0024] The mounting shell has six sides, and each side of the mounting shell is provided with a nitrogen purge hole, and each side is correspondingly connected to a scraper or rotatably connected to a grinding rod;

[0025] Wherein, each grinding rod is correspondingly connected to a second driving unit in transmission.

[0026] In an optional embodiment, the rotating spindle includes a spindle section, a connecting shell, a linear bearing, an optical axis section, a retaining spring, a first buffer pad, an elastic member, a second buffer pad, and a dustproof shell;

[0027] Both ends of the main shaft section are respectively connected to the grinding mounting plate and the connecting shell;

[0028] The linear bearing is connected inside the connecting shell, and the optical axis section is connected to the linear bearing; The snap ring is connected to one end of the optical axis section and is used to abut against the linear bearing to limit the sliding of the optical axis section in the direction of sliding out of the connecting shell; The other end of the optical axis section is connected to the mounting table;

[0029] The first buffer pad, the elastic member and the second buffer pad are all sleeved on the optical axis section, and the elastic member is located between the first buffer pad and the second buffer pad; The first buffer pad abuts against the linear bearing, and the second buffer pad abuts against the mounting table;

[0030] The dust-proof shell is connected to the mounting shell, covers the outside of the optical axis section, and is slidably matched with the connecting shell.

[0031] In an alternative embodiment, the powder sieving device further includes a frame, an electrostatic eliminator and an electrostatic elimination table;

[0032] Both the electrostatic eliminator and the electrostatic elimination table are connected to the frame, and the electrostatic elimination table is located on the side of the frame close to the grinding disc.

[0033] In an alternative embodiment, the powder sieving device further includes a nitrogen generator connected to the frame. The nitrogen generator is connected to the mounting shell through a pipeline to supply nitrogen to the mounting shell.

[0034] The beneficial effects of the powder sieving device provided by the embodiments of the present invention include:

[0035] The powder sieving device includes a grinding disc, a screening disc group, a vibration mechanism, a multi-axis robotic arm and a grinding component; The screening disc group is connected to the lower end of the grinding disc, and the vibration mechanism is connected to the lower end of the screening disc group; The free end of the multi-axis robotic arm is connected to the grinding component and is used to drive the grinding component to change positions in space; The grinding component is used to grind the material on the grinding disc when it moves into the grinding disc; wherein, a waste outlet is arranged on the outer periphery of the grinding disc; An outlet is arranged on the outer periphery of the screening disc group. The powder sieving device can improve the grinding and sieving quality of the powder, and at the same time can improve its automation degree and production efficiency. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0037] Figure 1 It is a schematic structural diagram of the powder sieving device provided in this embodiment from the first perspective;

[0038] Figure 2 Structural schematic diagram of the powder sieving equipment provided in this embodiment from the second perspective;

[0039] Figure 3 Structural schematic diagram of the powder sieving equipment provided in this embodiment from the third perspective;

[0040] Figure 4 Structural schematic diagram of the grinding disc, screening disc group and vibration mechanism provided in this embodiment;

[0041] Figure 5 Cross-sectional view of the grinding disc, screening disc group and vibration mechanism provided in this embodiment;

[0042] Figure 6 Structural schematic diagram of the first screening disc provided in this embodiment;

[0043] Figure 7 Structural schematic diagram of the multi-axis robotic arm, grinding assembly and frame provided in this embodiment;

[0044] Figure 8 Structural schematic diagram of the multi-axis robotic arm and grinding assembly provided in this embodiment;

[0045] Figure 9 Structural schematic diagram of the grinding assembly provided in this embodiment;

[0046] Figure 10 Structural schematic diagram of the grinding mounting plate, first drive unit, rotating main shaft and mounting block provided in this embodiment;

[0047] Figure 11 Structural schematic diagram of the mounting shell, mounting table, linear bearing, optical axis section, circlip, first buffer pad, elastic member and second buffer pad provided in this embodiment;

[0048] Figure 12 Structural schematic diagram of the second drive unit provided in this embodiment.

[0049] Icons: 100 - Powder sieving equipment; 110 - Grinding disc; 120 - Sieving disc group; 130 - Vibration mechanism; 140 - Multi-axis robotic arm; 150 - Grinding assembly; 111 - Waste outlet; 121 - Discharge outlet; 112 - Grinding mesh; 122 - First sieving disc; 123 - Second sieving disc; 124 - Annular sealing protection strip; 125 - Feeding hole; 126 - Sieving boosting bouncing ball; 131 - Vibration disc frame; 132 - Vibration disc; 133 - Vibration motor; 134 - Vibration sensor; 151 - Grinding mounting plate; 152 - First driving unit; 153 - Rotating main shaft; 154 - Mounting block; 155 - Scraper; 156 - Grinding rod; 157 - Mounting shell; 158 - Mounting table; 159 - Second driving unit; 161 - Nitrogen purge hole; 162 - Main shaft section; 163 - Connecting shell; 164 - Linear bearing; 165 - Optical axis section; 166 - Snap ring; 167 - First buffer pad; 168 - Elastic member; 169 - Second buffer pad; 171 - Dust-proof shell; 172 - First driving coupling; 173 - Second driving coupling; 174 - Cover plate; 175 - Pressure sensor; 181 - Frame; 182 - Static eliminator; 183 - Static elimination table; 184 - Nitrogen generator. Detailed implementation manners

[0050] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0052] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0053] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0054] In addition, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they should not be construed as indicating or implying relative importance.

[0055] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0056] Please refer to Figures 1-4 , this embodiment provides a powder sieving device 100, which includes a grinding disc 110, a sieve disc group 120, a vibration mechanism 130, a multi-axis robotic arm 140, and a grinding assembly 150;

[0057] The sieve disc group 120 is connected to the lower end of the grinding disc 110, and the vibration mechanism 130 is connected to the lower end of the sieve disc group 120;

[0058] The free end of the multi-axis robotic arm 140 is connected to the grinding assembly 150 and is used to drive the grinding assembly 150 to change its position in space; the grinding assembly 150 is used to grind the material on the grinding disc 110 when it moves into the grinding disc 110;

[0059] Among them, a waste outlet 111 is arranged on the outer periphery of the grinding disc 110; an outlet 121 is arranged on the outer periphery of the sieve disc group 120.

[0060] Please refer to Figures 1-4 , the working principle of this powder sieving device 100 is as follows:

[0061] First of all, this embodiment takes the grinding and sieving of ammonium perchlorate powder by this powder sieving device 100 as an example for illustration. In other embodiments of the present invention, this powder sieving device 100 can also be applied to the processing of other types of powders.

[0062] This powder sieving device 100 includes a grinding disc 110, a sieve disc group 120, a vibration mechanism 130, a multi-axis robotic arm 140, and a grinding assembly 150;

[0063] Among them, the screening disk group 120 is connected to the lower end of the grinding disk 110, and the vibration mechanism 130 is connected to the lower end of the screening disk group 120; the free end of the multi-axis robotic arm 140 is connected to the grinding assembly 150 and is used to drive the grinding assembly 150 to change positions in space. Furthermore, the multi-axis robotic arm 140 can drive the grinding assembly 150 to move relative to the grinding disk 110, thereby adjusting the position and angle of the grinding assembly 150 inside the grinding disk 110, as well as the position and angle of the grinding assembly 150 outside the grinding disk 110, so as to achieve all-round and multi-angle grinding and dispersion, more effectively grinding the ammonium perchlorate powder inside the grinding disk 110 to a suitable particle size, ensuring smooth and accurate subsequent sieving;

[0064] Moreover, during the grinding process, as the grinding continues, the powder with a suitable particle size will fall onto the screening disk group 120. After being screened by multiple channels of the screening disk group 120, it will be discharged from the discharge port 121 on the outer periphery of the screening disk group 120, and the generated waste will be provided with a waste port 111 on the outer periphery of the grinding disk 110;

[0065] In summary, the powder sieving device 100 can improve the grinding and sieving quality of the powder, and at the same time can improve its automation degree and production efficiency.

[0066] Furthermore, please refer to Figures 1-6 , in this embodiment, a grinding mesh 112 is built into the grinding disk 110, and the grinding mesh 112 is located above the screening disk group 120. The grinding assembly 150 is used to grind the materials inside the grinding mesh 112; among them, the screening disk group 120 is used to receive the powder passing through the grinding mesh 112; the waste port 111 is used to discharge the materials that fail to pass through the grinding mesh 112. During the grinding process, the powder sieving device 100 drives the grinding assembly 150 to move relative to the grinding disk 110 through the multi-axis robotic arm 140, thereby adjusting the position and angle of the grinding assembly 150 inside the grinding disk 110, so as to achieve all-round and multi-angle grinding and dispersion, more effectively grinding the ammonium perchlorate powder inside the grinding disk 110 to a suitable particle size, ensuring smooth and accurate subsequent sieving.

[0067] In order to filter the ground powder, when configuring the screening disk group 120, the screening disk group 120 includes a first screening disk 122 and a second screening disk 123. Among them, the grinding disk 110 is connected to the first screening disk 122. The first screening disk 122 is located directly below the grinding mesh 112 and is used to receive the powder passing through the grinding mesh 112;

[0068] The first screening disk 122 is connected to the second screening disk 123. The second screening disk 123 is located directly below the first screening disk 122 and is used to receive the powder passing through the first screening disk 122;

[0069] Among them, the discharge port 121 is provided on the outer periphery of the second screening plate 123.

[0070] Thus, through the above-mentioned setting method, the powder passing through the grinding mesh 112 can be received by the first screening plate 122, and after the powder is screened, it is introduced into the second screening plate 123 and discharged through the discharge port 121 on its outer periphery.

[0071] During the process of screening the powder by the screening plate group 120, the screening plate group 120 can be driven to vibrate synchronously by the vibration mechanism 130, thereby improving the screening efficiency of the powder.

[0072] Moreover, during the process of screening the powder, in order to improve the screening efficiency and prevent the powder from accumulating or blocking on the first screening plate 122, therefore, the first screening plate 122 is provided with multiple annular sealing protection strips 124. The multiple annular sealing protection strips 124 are all arranged around the axis of the first screening plate 122, and the diameters of the multiple annular sealing protection strips 124 gradually increase. An annular screening area is enclosed between any two adjacent annular sealing protection strips 124; multiple blanking holes 125 are opened in each annular screening area around the axis of the first screening plate 122 and towards the second screening plate 123;

[0073] Among them, at least one screening assistance bouncing ball 126 is arranged in each annular screening area.

[0074] Through such a setting method, during the blanking and screening process, under the vibration action of the vibration mechanism 130, the above-mentioned screening plate group 120 can be driven to vibrate. During this process, each screening assistance bouncing ball 126 can be made to bounce in its corresponding annular screening area, thereby improving the blanking efficiency of the powder in its corresponding annular screening area and preventing the occurrence of material accumulation or blockage.

[0075] When configuring the vibration mechanism 130, the function of the vibration mechanism 130 is to drive the screening plate group 120 to vibrate, thereby improving its blanking and screening efficiency. Based on this, the vibration mechanism 130 includes a vibration disc frame 131, a vibration disc 132, a vibration motor 133, and a vibration sensor 134;

[0076] The vibration disc 132 is connected to the vibration disc frame 131 through multiple vibration buffer elastic members 168, and the vibration motor 133 is connected to the vibration disc 132; the second screening plate 123 is connected to the vibration disc 132; the vibration sensor 134 is connected to the vibration disc 132.

[0077] Thus, through the above structural arrangement, when the vibration motor 133 operates, it can drive the vibration disc 132 and the second screening disc 123 connected to the vibration disc 132 to vibrate relative to the vibration disc frame 131. At the same time, the vibration sensor 134 detects its vibration frequency, thereby realizing the closed-loop control of vibration.

[0078] Please refer to Figures 1-12 , and when configuring the grinding assembly 150, its function is to move relative to the grinding disc 110 under the driving action of the multi-axis robotic arm 140, so that it can adjust its relative position inside the grinding disc 110 in the grinding state or its position outside the grinding disc 110 in the non-grinding state. Thus, the grinding assembly 150 includes a grinding mounting plate 151, a first driving unit 152, a rotating main shaft 153, a mounting block 154, a plurality of scraping plates 155, and a plurality of grinding rods 156;

[0079] The first driving unit 152 and the rotating main shaft 153 are connected to the grinding mounting plate 151, and the first driving unit 152 is used to drive the rotating main shaft 153 to rotate; the mounting block 154 is connected to one end of the rotating main shaft 153 away from the grinding mounting plate 151; a plurality of scraping plates 155 and a plurality of grinding rods 156 are connected to the mounting block 154 at intervals in the axial direction of the rotating main shaft 153;

[0080] Among them, the free end of the multi-axis robotic arm 140 is connected to the grinding mounting plate 151.

[0081] Through the above structural arrangement, the grinding mounting plate 151 can be connected to the free end of the multi-axis robotic arm 140, and then it can move relative to the grinding disc 110 under the driving action of the multi-axis robotic arm 140. During its use, the first driving unit 152 drives the rotating main shaft 153 to rotate, thereby driving a plurality of scraping plates 155 and a plurality of grinding rods 156 to perform grinding and scraping in the grinding disc 110. In this way, the grinding efficiency can be improved; and during its use, the rotation speed and relative position can be adjusted by controlling the multi-axis robotic arm 140 and the first driving unit 152, so that it can have a higher automation level, thereby improving its flexibility and adaptability in use.

[0082] When configuring the mounting block 154, the mounting block 154 includes a mounting shell 157, a mounting table 158, and a plurality of second driving units 159;

[0083] The mounting table 158 is placed inside the mounting shell 157, and the mounting table 158 is connected to the rotating main shaft 153, and a plurality of second driving units 159 are all connected to the mounting table 158;

[0084] The mounting housing 157 has six sides, and nitrogen purge holes 161 are provided on each side of the mounting housing 157, and a scraper 155 is correspondingly connected to each side or a grinding rod 156 is rotatably connected thereto;

[0085] Among them, each grinding rod 156 is correspondingly connected to a second driving unit 159 in a transmission manner.

[0086] In this way, during the working process, the mounting table 158 is connected to the rotating main shaft 153, so that the rotating main shaft 153 can drive the mounting housing 157 to rotate under the driving action of the first driving unit 152, and further drive the scraper 155 and the grinding rod 156 connected to the mounting housing 157 to rotate synchronously; on this basis, since each grinding rod 156 is rotatably connected to the mounting housing 157, therefore, the corresponding grinding rod 156 can be driven to rotate by each second driving unit 159. Furthermore, when the rotating main shaft 153 rotates, it can drive the mounting block 154 and multiple scrapers 155 and grinding rods 156 to rotate relative to the axis of the rotating main shaft 153. At the same time, each grinding rod 156 can be driven by the second driving unit 159 to rotate along its axis. In this way, the grinding efficiency of the grinding rod 156 can be improved.

[0087] Furthermore, in this embodiment, the rotating main shaft 153 includes a main shaft section 162, a connecting housing 163, a linear bearing 164, a smooth shaft section 165, a snap ring 166, a first buffer pad 167, an elastic member 168, a second buffer pad 169, and a dust-proof housing 171;

[0088] Both ends of the main shaft section 162 are respectively connected to the grinding mounting plate 151 and the connecting housing 163;

[0089] The linear bearing 164 is connected inside the connecting housing 163, and the smooth shaft section 165 is connected to the linear bearing 164; the snap ring 166 is connected to one end of the smooth shaft section 165 and is used to abut against the linear bearing 164 to limit the sliding of the smooth shaft section 165 in the direction of sliding out of the connecting housing 163; the other end of the smooth shaft section 165 is connected to the mounting table 158;

[0090] The first buffer pad 167, the elastic member 168, and the second buffer pad 169 are all sleeved on the smooth shaft section 165, and the elastic member 168 is located between the first buffer pad 167 and the second buffer pad 169; the first buffer pad 167 abuts against the linear bearing 164, and the second buffer pad 169 abuts against the mounting table 158;

[0091] The dust-proof housing 171 is connected to the mounting housing 157, covers the outside of the smooth shaft section 165, and is slidably matched with the connecting housing 163.

[0092] With the above structural arrangement, when the first driving unit 152 drives the main shaft section 162 to rotate, the connecting shell 163 can be driven to rotate synchronously, and then the optical axis section 165 and the mounting block 154 can be driven to rotate synchronously. During this process, since the optical axis section 165 is connected to the linear bearing 164, it can slide relative to the linear bearing 164 and can be limited by the snap ring 166 to prevent it from sliding out of the linear bearing 164. In addition, through the structural arrangement of the first buffer pad 167, the elastic member 168 and the second buffer pad 169, during the grinding process, it can also buffer the rotation of the main shaft 153 to prevent it from vibrating or having relative displacement, which may cause damage to the grinding assembly 150.

[0093] Further, to improve the safety during the treatment of the diversion port, the powder sieving device 100 further includes a frame 181, an electrostatic eliminator 182, and an electrostatic elimination table 183. The electrostatic eliminator 182 and the electrostatic elimination table 183 are both connected to the frame 181, and the electrostatic elimination table 183 is located on the side of the frame 181 close to the grinding disc 110. In this way, the situation of powder explosion due to static electricity can be avoided. Moreover, during the grinding process, since the powder sieving device 100 further includes a nitrogen generator 184 connected to the frame 181, the nitrogen generator 184 is connected to the installation shell 157 through a pipeline to supply nitrogen to the installation shell 157. Then, nitrogen can be supplied to the installation shell 157 through the nitrogen generator 184 and sent out through the nitrogen purge holes 161, thereby purging the grinding disc 110 and improving the grinding efficiency.

[0094] In addition to the above structure, a pressure sensor 175 can also be configured at the connection between the multi-axis robotic arm 140 and the grinding mounting plate 151 to detect the pressure it receives during the grinding process.

[0095] In summary, please refer to Figures 1-12 , the specific structure of the powder sieving device 100 is as follows. The powder sieving device 100 includes a multi-axis robotic arm 140, a grinding disc 110, a sieve disc group 120, a vibration mechanism 130, and a grinding assembly 150.

[0096] Among them, the multi-axis robotic arm 140 is fixedly installed on the frame 181. The bottom surface of the frame 181 is equipped with an electrostatic eliminator 182 and a nitrogen generator 184. An electrostatic elimination table 183 is arranged on the upper surface of the frame 181 on the side close to the grinding disc 110.

[0097] The free end of the multi-axis robotic arm 140 is fixedly connected to the top of the grinding assembly 150 through a robotic arm connection flange, that is, connected to the grinding mounting plate 151, and a spoke-type pressure sensor 175 is installed at the connection.

[0098] When the rotating main shaft 153 is drivingly connected to the first driving unit 152, the first driving unit 152 includes a speed reducer and an explosion-proof motor. Both the speed reducer and the explosion-proof motor are connected to the grinding mounting plate 151, and the main shaft section 162 of the rotating main shaft 153 is connected to the speed reducer. Moreover, when connecting the main shaft section 162 to the lower part, the main shaft section 162 and the speed reducer can be connected through a first driving coupling 172, and the main shaft section 162 is connected to the connection housing 163.

[0099] One end of the optical axis section 165 extends into the connection housing 163 and is slidably connected to the linear bearing 164 inside the connection housing 163, and a snap ring 166 is used to limit its position. Thus, the optical axis section 165 can slide relative to the connection housing 163 along the axis of the main shaft section 162 with respect to the connection housing 163. In addition, the other end of the optical axis section 165 is connected to the lower mounting table 158, and a first buffer pad 167, an elastic member 168, and a second buffer pad 169 are arranged between the linear bearing 164 and the mounting table 158. Moreover, the first buffer pad 167 abuts against the linear bearing 164, and the second buffer pad 169 abuts against the mounting table 158. In this way, during the grinding process, the mounting table 158 can move along with the movement of the scraping plate 155 and the grinding rod 156, and thus move relative to the connection housing 163. As a result, it can slide relative to the linear bearing 164 through the optical axis section 165, and during this process, the first buffer pad 167, the elastic member 168, and the second buffer pad 169 play a buffering role. Moreover, during the grinding process, a dust-proof housing 171 sleeved outside the optical axis section 165 and slidably engaged with the connection housing 163 can also play a dust-proof role to maintain the operating stability of the rotating main shaft 153.

[0100] When connecting the optical axis section 165 to the mounting table 158, the optical axis section 165 is passed through the cover plate 174 of the mounting shell 157 and extends into the mounting shell 157, and the second buffer pad 169 is also located inside the mounting shell 157. That is, the space inside the mounting shell 157 can be relatively closed to the outside through the cover plate 174 of the mounting shell 157, and at this time, the dust-proof housing 171 is connected to the cover plate 174.

[0101] When configuring the mounting shell 157, six continuous side surfaces are provided on the outer periphery of the mounting shell 157, and the number of scraping plates 155 is three, and the number of grinding rods 156 is also three. In this way, the three scraping plates 155 and the three grinding rods 156 are respectively connected to one side surface around the axis of the rotating main shaft 153 and are arranged out of order. Moreover, in order to enable the nitrogen generated by the nitrogen generator 184 to purge the powder in the grinding disc 110, nitrogen purge holes 161 are opened on each side surface of the mounting shell 157.

[0102] Moreover, when installing the grinding rod 156, it is rotatably connected to the installation shell 157, and one end extending into the installation shell 157 is in transmission connection with the second driving unit 159; specifically, each second driving unit 159 includes a driving motor and a second driving coupling 173. The driving motor is connected to the installation table 158, and the number of driving motors is the same as the number of grinding rods 156 for one-to-one connection, that is, each grinding rod 156 is in transmission connection with the corresponding driving motor through the second driving coupling 173.

[0103] When configuring the grinding disc 110, the screening disc group 120 and the vibration mechanism 130, the grinding disc 110 and the screening disc group 120 are stacked above the vibration mechanism 130, so that the powder in the grinding disc 110 can be ground by the grinding assembly 150, and then, under the vibration of the vibration mechanism 130, the powder can be screened through the grinding disc 110 and the screening disc group 120; among them, when connecting the grinding disc 110, the first screening disc 122 and the second screening disc 123, the grinding disc 110 and the second screening disc 123 can be respectively connected by clamps, and the second screening disc 123 can be connected to the vibration disc 132.

[0104] Based on the above structural settings, please refer to Figures 1-12 , the working process of the powder sieving device 100 is as follows:

[0105] Before actual production operation, first conduct a comprehensive debugging of the equipment. After the debugging is completed, start the equipment, and place an appropriate amount of ammonium perchlorate powder to be processed in the grinding disc 110; the multi-axis robotic arm 140 drives the grinding assembly 150 to move to a suitable position above the grinding disc 110;

[0106] The grinding assembly 150 starts to work. The control system starts the explosion-proof motor according to the preset grinding speed and torque parameters. The power is sequentially transmitted to the rotating main shaft 153 through the reducer and the first driving connection coupling, driving the grinding rod 156 to rotate, grinding the ammonium perchlorate powder to make it broken and refined;

[0107] At the same time, the pneumatic driving motor drives the grinding rod 156 to rotate self - rotatably, making a circular motion along the inner wall of the grinding disc 110 and accompanied by small - amplitude up - and - down vibrations at the same time, constantly turning and dispersing the ammonium perchlorate powder to ensure the uniform distribution of the ammonium perchlorate powder in the grinding cavity;

[0108] The spoke-type pressure sensor 175 can monitor the grinding pressure in real time and transmit the pressure data to the control system. If the pressure is too high, the control system will reduce the motor speed or adjust the output power of the pneumatic drive motor to prevent over-grinding of the ammonium perchlorate powder or damage to the equipment; if the pressure is too low, the power output will be appropriately increased to ensure the grinding effect. During the whole process, the static eliminator 182 and the nitrogen generator 184 work together to remove static electricity and prevent the oxidation of the ammonium perchlorate powder.

[0109] After the grinding is completed, the ammonium perchlorate powder falls into the screening disc group 120 under the action of gravity; driven by the vibration motor, the vibration disc 132 and the screening disc group 120 vibrate relative to the vibration disc frame 131, and the ammonium perchlorate powder is screened under the action of vibration; at this time, the grinding mesh 112 in the grinding disc 110 can finely screen out larger particle impurities and conduct preliminary classification, while the first screening disc 122 further screens out ammonium perchlorate powder particles with qualified particle sizes. The screening assist bouncing balls 126 keep bouncing in the first screening disc 122, effectively preventing the first screening disc 122 from being blocked and ensuring the continuous and efficient progress of the screening process. The vibration sensor 134 monitors the vibration frequency and amplitude in real time and feeds the data back to the control system in real time. The control system accurately adjusts the output parameters of the vibration motor according to the feedback information to ensure the best screening effect. The qualified ammonium perchlorate powder after screening is discharged from the discharge port 121, and the waste is discharged from the waste port 111 and enters the next process.

[0110] Please refer to Figures 1-12 , the powder screening equipment 100 has the following advantages:

[0111] The powder screening equipment 100 is configured with multiple grinding rollers and scrapers 155. With the position adjustment of the multi-axis robotic arm 140, it can achieve all-round and multi-angle grinding and dispersion, more effectively grind the ammonium perchlorate powder to a suitable particle size, and ensure smooth and accurate subsequent screening;

[0112] When configuring the grinding rod 156, a tungsten carbide coating is applied to its outer layer, which can reduce wear when contacting the ammonium perchlorate powder and at the same time maintain the surface state to ensure uniform force applied to the powder. The outer surface of the scraper 155 is coated with polyurethane material, which maintains a good scraping effect when contacting the ammonium perchlorate powder and the screen. Its flexibility makes it better fit the surface of the screen, effectively removing the residual ammonium perchlorate powder and impurities and preventing the screen from being blocked;

[0113] During the screening process, a multi-layer screen combination configured with a grinding screen 112, a first screening plate 122, and a second screening plate 123 is adopted. And under the synergistic action of the vibration mechanism 130 and the screening-assisting bouncing balls 126, the screening accuracy can be significantly improved. Moreover, screens with different pore sizes can classify and screen the ammonium perchlorate powder to remove finer impurities and agglomerates. The screening-assisting bouncing balls 126 are made of stainless steel, and their bouncing prevents the screen from being blocked, ensuring efficient screening.

[0114] In addition, the powder sieving device 100 can control the multi-axis robotic arm 140, the first driving unit 152, the second driving unit 159, and the vibration mechanism 130. Furthermore, by setting the trajectory of the robotic arm, the operation process, and the grinding parameters, the frequency of the vibration screening mechanism can be monitored to ensure the grinding and screening effects. Key parameters are monitored by sensors and fed back to the control system to achieve intelligent control, automatically adjust relevant parameters, maintain the best state, improve the sieving accuracy and efficiency, and reduce energy consumption and equipment wear.

[0115] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A powder screening device, characterized in that: The powder screening equipment comprises a grinding disc, a screening disc group, a vibration mechanism, a multi-axis mechanical arm and a grinding assembly; The screening disc group is connected to the lower end of the grinding disc, and the vibration mechanism is connected to the lower end of the screening disc group; The free end of the multi-axis mechanical arm is connected to the grinding assembly and is used to drive the grinding assembly to change its position in space; the grinding assembly is used to grind the material on the grinding disc when it moves into the grinding disc; Wherein, the outer periphery of the grinding disc is configured with a waste port; the outer periphery of the screening disc group is configured with a discharge port.

2. The powder screening device according to claim 1, characterized in that: The grinding disc is equipped with a grinding net, and the grinding net is located above the screening disc group, and the grinding assembly is used to grind the material in the grinding net; The screening disc assembly is used to receive the powder passing through the grinding net; the waste material port is used to discharge the material that fails to pass through the grinding net.

3. The powder screening device according to claim 2, characterized in that: The screening disc set comprises a first screening disc and a second screening disc; The grinding disc is connected to the first screening disc, and the first screening disc is located directly below the grinding net and is used to receive the powder passing through the grinding net; The first screening disc is connected to the second screening disc, and the second screening disc is located directly below the first screening disc and is used to receive the powder material passing through the first screening disc; Wherein, the discharge port is arranged on the outer periphery of the second screening disk.

4. The powder screening device according to claim 3, characterized in that: The first screening disc is provided with a plurality of annular sealing protection strips, which are all arranged around the axis of the first screening disc, and the diameters of the plurality of annular sealing protection strips gradually increase, and an annular screening zone is enclosed between any two adjacent annular sealing protection strips; and a plurality of discharge holes are opened in each of the annular screening zones around the axis of the first screening disc toward the direction of the second screening disc; Wherein, each of the annular screening areas is provided with at least one screening-assisting bouncing ball.

5. The powder screening device according to claim 4, characterized in that: The vibration mechanism includes a vibration disc frame, a vibration disc, a vibration motor and a vibration sensor; The vibrating disc is connected to the vibrating disc frame through a plurality of vibration buffer elastic parts, and the vibration motor is connected to the vibrating disc; the second screening disc is connected to the vibrating disc; and the vibration sensor is connected to the vibrating disc.

6. The powder screening device according to claim 1, characterized in that: The grinding assembly includes a grinding mounting plate, a first driving unit, a rotating spindle, a mounting block, a plurality of scrapers, and a plurality of grinding rods; The first driving unit and the rotating spindle are connected to the grinding mounting plate, and the first driving unit is used to drive the rotating spindle to rotate; the mounting block is connected to one end of the rotating spindle away from the grinding mounting plate; the plurality of scrapers and the plurality of grinding rods are connected to the mounting block at intervals around the axis direction of the rotating spindle; Wherein, the free end of the multi-axis robotic arm is connected to the grinding mounting plate.

7. The powder screening device according to claim 6, characterized in that: The mounting block includes a mounting shell, a mounting platform and a plurality of second driving units; The mounting platform is placed in the mounting shell, and the mounting platform is connected to the rotating main shaft, and a plurality of the second driving units are all connected to the mounting platform; The mounting shell has six sides, and each side of the mounting shell is provided with a nitrogen purge hole, and each side is correspondingly connected to one of the scrapers or correspondingly rotatably connected to one of the grinding rods; Wherein, each of the grinding rods is correspondingly connected in transmission with one of the second driving units.

8. The powder screening device according to claim 7, characterized in that: The rotating main shaft comprises a main shaft section, a connecting shell, a linear bearing, an optical shaft section, a retaining spring, a first buffer pad, an elastic member, a second buffer pad and a dustproof shell; The two ends of the main shaft section are respectively connected to the grinding mounting plate and the connecting shell; The linear bearing is connected in the connecting shell, and the optical axis segment is connected to the linear bearing; the retaining spring is connected to one end of the optical axis segment and is used to abut against the linear bearing to limit the sliding of the optical axis segment in the direction of sliding out of the connecting shell; the other end of the optical axis segment is connected to the mounting platform; The first buffer pad, the elastic member and the second buffer pad are all sleeved on the optical axis segment, and the elastic member is located between the first buffer pad and the second buffer pad; the first buffer pad abuts against the linear bearing, and the second buffer pad abuts against the mounting platform; The dustproof shell is connected to the mounting shell, and is arranged outside the optical axis section, and is slidably matched with the connecting shell.

9. The powder screening device according to any one of claims 1 to 8, characterized in that: The powder screening equipment also includes a frame, a static eliminator and a static eliminator table; The static eliminator and the static eliminator platform are both connected to the frame, and the static eliminator platform is located on one side of the frame close to the grinding disc.

10. The powder screening device according to claim 9, characterized in that: The powder screening equipment further comprises a nitrogen generator connected to the frame, and the nitrogen generator is communicated with a pipeline of the installation shell to transport nitrogen to the installation shell.

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