A grinding and screening machine for abrasive production

Abstract

The utility model is specifically related to a kind of grinding and screening machine for abrasive production, it is characterized by including support, grinding bin is equipped on support, the side of grinding bin is equipped with feed inlet, lower part is equipped with discharge gate, the lower part of grinding bin is equipped with screening unit, grinding bin inside is equipped with grinding unit, the grinding unit includes the upper grinding disc and lower grinding disc installed in lower part in grinding bin, upper grinding disc is connected with drive unit, screening unit is ultrasonic wave vibrating screen classifier, multiple screen meshes are installed in ultrasonic wave vibrating screen classifier, tray and ultrasonic wave vibration generator are equipped in the bottom of ultrasonic wave vibrating screen classifier.The utility model has the advantages of high crushing efficiency, good grinding effect, stable and reliable work.

Description

Technical Field

[0001] This utility model belongs to the field of abrasive grinding and screening devices, specifically relating to a grinding and screening machine used in abrasive production. Background Technology

[0002] Ceramic corundum abrasives are produced using sol-gel technology, typically involving multiple process steps such as sol-gel preparation, gel drying, pre-crushing, sintering, and grinding. Grinding requires a grinder and a sieve. Therefore, those skilled in the art have developed grinders with sieving functions. For example, the utility model patent technology entitled "A Grinding Machine for Abrasive Production," authorized by the Chinese Patent Office on July 22, 2022, with publication number CN217016813U, includes a grinding chamber and a first rotating shaft within the grinding chamber. Grinding blocks are mounted on the first rotating shaft, and a grinding disc is mounted on the inner wall of the grinding chamber corresponding to the grinding blocks. A first grinding layer is positioned below the grinding blocks, a second grinding layer is positioned on the grinding disc, and a sieve is positioned below the grinding disc. A reflux mechanism is positioned on the outside of the grinding chamber corresponding to the sieve. This grinding machine uses grinding blocks and a grinding disc to grind abrasive particles, and can sieve the ground abrasive particles, allowing unqualified abrasive particles to be reintroduced into the grinding chamber for grinding via the reflux mechanism.

[0003] However, the grinding machine with the above structure also has the following drawbacks: 1) The gap between the grinding block and the grinding disc is not adjustable, which is inconvenient to use. Moreover, after long-term use, the grinding block and the grinding disc will wear down, causing the gap between the grinding block and the grinding disc to become larger, resulting in poor grinding effect on micro powder abrasives. 2) The grinding of abrasives is achieved solely by the rotation of the grinding blocks, resulting in a single grinding method and low grinding efficiency for large abrasive particles.

[0004] 3) The screen can only retain unqualified abrasive particles and cannot directly screen them into finished products of different particle sizes. Utility Model Content

[0005] The purpose of this utility model is to provide a grinding and screening machine for abrasive production, which improves the efficiency of large abrasive particles and the grinding effect of micro-powder abrasives by combining mechanical grinding with vibration crushing. By setting multiple layers of screens, it can be directly screened into finished products of different particle sizes.

[0006] This utility model is achieved through the following technical solution: A grinding and screening machine for abrasive production is characterized by comprising a support frame, a grinding chamber mounted on the support frame, a feed inlet on one side of the grinding chamber, a discharge outlet at the bottom, and a screening unit located below the grinding chamber. The grinding unit is housed inside the grinding chamber, and includes an upper grinding disc and a lower grinding disc mounted in the lower part of the grinding chamber. The upper grinding disc is conical, and the lower grinding disc has a conical groove matching the upper grinding disc. A discharge port penetrating the disc body is located in the middle of the lower grinding disc. The upper grinding disc is connected to a drive unit, which includes a geared motor, a linear stepper motor, and a first rotating shaft. The lower end of the first rotating shaft passes through the grinding chamber and connects to the upper grinding disc. The upper end is connected to the output shaft of a linear stepper motor mounted on the upper end of the bracket via a first bearing. A first spur gear is provided on the first shaft. On one side of the first shaft, a second shaft is mounted on the bracket via a second bearing. A second spur gear that meshes with the first spur gear is mounted on the second shaft. A second pulley is mounted on one end of the second shaft. A geared motor is mounted on the outer side of the bracket. A first pulley is mounted on the output shaft of the geared motor. A belt is provided between the first pulley and the second pulley. The screening unit is an ultrasonic vibrating screen. Multiple screens are installed inside the ultrasonic vibrating screen. A tray and an ultrasonic vibration generator are provided at the bottom of the ultrasonic vibrating screen.

[0007] The principle of this utility model is as follows: When the grinding unit is working, the upper grinding disc is first pushed downward by a linear stepper motor to press the abrasive. Then, the geared motor is started to drive the upper grinding disc to rotate and grind the abrasive. That is, the gap between the upper and lower grinding discs of this invention can be adjusted, which has a good grinding effect on micro powder abrasive.

[0008] The ultrasonic vibrating screen of this utility model is a commercially available product with mature existing technology, and the preferred product is the CXZS-1000 model manufactured by Xinxiang Junsheng Machinery Equipment Co., Ltd.

[0009] Furthermore, the upper grinding disc of this utility model is internally fitted with an eccentric vibration motor. The upper grinding disc is connected to the first rotating shaft via a connecting body. The upper grinding disc and the connecting body are connected by a shock-absorbing mechanism. The connecting body is a conical structure symmetrical to the upper grinding disc. The edges of the connecting body and the upper grinding disc are respectively provided with multiple corresponding first and second limiting grooves. The cross-section of the first limiting groove is T-shaped, and the cross-section of the second limiting groove is an inverted T-shape. After the first and second limiting grooves are aligned, they form a limiting groove with an I-shaped cross-section. The shock-absorbing mechanism includes a shock-absorbing strip with an I-shaped cross-section. The shock-absorbing strip is inserted into two aligned first and second limiting grooves to connect the upper grinding disc and the connecting body together. The shock-absorbing strip includes an upper horizontal plate, a middle connecting plate, and a lower horizontal plate. The bottom surface of the upper horizontal plate located in the first limiting groove has symmetrically downward protruding limiting posts on both sides of the middle connecting plate. Each limiting post is fitted with a shock-absorbing spring, and the lower end of the shock-absorbing spring is provided with a shock-absorbing plate.

[0010] The connecting shock absorption mechanism of this utility model connects the upper grinding disc and the connecting body together, and then the top and bottom surfaces are fastened with bolts.

[0011] This invention features an eccentric vibration motor installed inside the upper grinding disc. When the upper grinding disc rotates, the eccentric vibration motor is activated. Through the impact and vibration generated by the eccentric motion, the abrasive is quickly crushed, improving the crushing efficiency of large abrasive particles. The damping spring connected to the damping mechanism is installed in the first limit groove, which can absorb 80% to 90% of the upward transmitted vibration, ensuring stable operation of the equipment.

[0012] Furthermore, the upper grinding disc of this utility model is divided into an outer coarse grinding zone and an inner fine grinding zone.

[0013] The grinding blocks in the coarse grinding zone have larger particle sizes and are used for the initial crushing of large abrasive particles. High-strength wear-resistant materials (such as tungsten carbide) are preferred.

[0014] The grinding blocks in the fine grinding zone have smaller particle sizes and are used for fine grinding of residual particles in the coarse grinding zone. Micro-fine ceramic grinding blocks are preferred.

[0015] Corresponding to the upper grinding disc, the lower grinding disc can also be divided into an outer coarse grinding zone and an inner fine grinding zone.

[0016] Furthermore, the screens of this invention are arranged from top to bottom in order of particle size from coarse to fine.

[0017] Furthermore, the bottom of the support frame and the bottom of the ultrasonic vibrating screen of this utility model are respectively provided with rollers.

[0018] By incorporating rollers, the ultrasonic vibrating screen and the support above can all move freely, making it flexible and convenient to use.

[0019] This utility model has the following advantages: 1) An eccentric vibration motor is installed in the traditional rotating upper grinding disc, which can quickly crush abrasive materials through the impact and vibration generated by the eccentric motion, thereby improving the crushing efficiency of large abrasive particles. 2) The gap between the upper and lower grinding discs can be adjusted, resulting in good grinding effect for micro-powder abrasives; 3) The grinding area of ​​the upper grinding disc is divided into a coarse grinding area and a fine grinding area. The grinding blocks in the fine grinding area have a coarse particle size, which is conducive to improving grinding efficiency. The fine grinding area further grinds the abrasive material flowing down from the coarse grinding area. 4) The screening unit has multiple screens with consecutive particle size numbers, which can be directly screened into finished products of different particle sizes according to the different particle size numbers of the screens. 5) The shock absorption mechanism connects the connecting body and the upper grinding disc. The shock absorption spring can effectively absorb the vibration transmitted upward by the eccentric vibration crusher, ensuring stable operation of the equipment. The grinding and screening machine of this invention is suitable for the grinding, crushing and screening stages of abrasives prepared by the sol-gel method. It can process sintered abrasive particles and realize continuous production. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the connector of this utility model; Figure 3 This is a three-dimensional structural diagram of the grinding disc of this utility model; Figure 4 This is a three-dimensional structural diagram of the shock absorption mechanism of this utility model; Figure 5 This is a three-dimensional structural diagram of the shock-absorbing mechanism of this utility model after removing the shock-absorbing spring and shock-absorbing plate. Figure 6 This is a schematic diagram of the structure of the grinding disc and connecting plate of this utility model when connected by a shock-absorbing mechanism.

[0021] As shown in the figure: 1. Linear stepper motor; 2. Bracket; 3. First bearing; 4. First shaft; 5. Grinding chamber; 6. First spur gear; 7. Dust cover; 8. Connector; 9. Upper grinding disc; 10. Feed inlet; 11. Lower grinding disc; 12. Discharge outlet; 13. Ultrasonic vibrating screen; 14. Screen; 15. Tray; 16. Second bearing; 17. Second shaft; 18. First pulley; 19. Belt; 20. Second pulley; 21. Gear motor; 22. Second spur gear; 23. Eccentric vibrating motor; 24. Ultrasonic vibration generator; 41. Shock absorber strip; 42. Shock absorber plate; 43. Shock absorber spring; 44. Limiting post; 81. First limiting groove; 91. Fine grinding zone; 92. Coarse grinding zone; 93. Second limiting groove. Detailed Implementation

[0022] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present utility model and are not intended to limit its scope of protection. It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which this utility model pertains.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown: Support 2 is a vertical square frame structure with four legs at the bottom, each equipped with a roller. A grinding chamber 5 is located in the upper middle part of support 2. A feed inlet 10 is located on the right side of the grinding chamber 5. The bottom of the grinding chamber 5 is funnel-shaped, with a discharge outlet 12 at the lower end. The grinding chamber 5 contains an upper grinding disc 9 and a lower grinding disc 11. The upper grinding disc 9 is a conical structure with the tip pointing downwards, and an eccentric vibration motor 23 is embedded inside. The middle part of the upper grinding disc 9 is the fine grinding zone 91, and the outer part is the coarse grinding zone 92. The grinding blocks in the coarse grinding zone have a larger particle size and are used for preliminary crushing of large abrasive particles. The grinding blocks in the fine grinding zone 91 have a smaller particle size and are used for fine grinding of residual particles in the coarse grinding zone. The lower grinding disc 11 has a conical groove that matches the upper grinding disc 9. A feeding port penetrating the disc body is provided in the middle. The upper grinding disc 9 is connected to the first rotating shaft 4 via a connecting body 8. The upper grinding disc 9 and the connecting body 8 are connected by a shock-absorbing mechanism. The connecting body 8 is a conical structure symmetrical to the upper grinding disc 9. The edges of the connecting body 8 and the upper grinding disc 9 are respectively provided with four sets of corresponding first limiting grooves 81 and second limiting grooves 93. The cross-section of the first limiting groove 81 is T-shaped, and the cross-section of the second limiting groove 93 is an inverted T-shape. After each set of first limiting grooves 81 and second limiting grooves 93 is aligned, a limiting groove with an I-shaped cross-section is formed. The shock-absorbing mechanism includes a shock-absorbing strip 41 with an I-shaped cross-section. The shock-absorbing strip 41 is inserted into two aligned first limiting grooves 81 and second limiting grooves 93 to... The grinding disc 9 and the connecting body 8 are connected together. The shock-absorbing strip 41 includes an upper horizontal plate, a middle connecting plate, and a lower horizontal plate. The bottom surface of the upper horizontal plate, located in the first limiting groove 81, has symmetrically arranged downward protruding limiting posts 44 on both sides of the middle connecting plate. Each limiting post 44 is fitted with a shock-absorbing spring 43. The lower end of the shock-absorbing spring 43 is provided with a shock-absorbing plate 42. That is, all the shock-absorbing springs 43 and shock-absorbing plates 42 are located in the first limiting groove 81. The lower end of the first rotating shaft 4 passes through the grinding chamber 5 and is connected to the connecting body 8. The upper end is connected to the output shaft of the linear stepper motor 1 mounted on the upper end of the bracket 2 through the first bearing 3. The first rotating shaft 4 is provided with a first spur gear 6. On one side of the first rotating shaft 4, the bracket 2 is connected to the first spur gear 16 through the second bearing 16. A second rotating shaft 17 is installed, and a second spur gear 22 that meshes with the first spur gear 6 is installed on the second rotating shaft 17. A second pulley 20 is installed at the upper end of the second rotating shaft 17. A reduction motor 21 is installed on the outer side of the bracket 2. A first pulley 18 is installed on the output shaft of the reduction motor 21. A belt 19 is provided between the first pulley 18 and the second pulley 20. An ultrasonic vibrating screen 13 is provided below the grinding chamber 5. Multiple screens 14 are installed inside the ultrasonic vibrating screen 13, arranged from top to bottom in order of particle size from coarse to fine. A tray 15 and an ultrasonic vibration generator 24 are also provided at the bottom of the ultrasonic vibrating screen 13. Four rollers are also provided at the bottom of the ultrasonic vibrating screen 13.

[0024] In use, the abrasive flows from top to bottom. The abrasive enters the grinding chamber 5 through the feed inlet 10 on the side of the grinding chamber 5, and then into the gap between the upper grinding disc 9 and the lower grinding disc 11. First, the linear stepper motor 1 pushes the connecting body 8 and the upper grinding disc 9 downwards to press the abrasive (when the first rotating shaft 4 is not rotating, the second spur gear 22 and the first spur gear 6 adopt a spur gear structure, which does not affect the vertical movement of the first rotating shaft 4). Then, the reduction motor 21 is started, and through the power transmission of the belt 19 and gears, the first rotating shaft 4, the connecting body 8, and the upper grinding disc 9 are driven to rotate. The lower grinding disc 11 is fixed inside the grinding chamber 5, and the rotation of the upper grinding disc 9 is sufficient for grinding. The grinding process involves a linear stepper motor 1 connected to a first rotating shaft 4 via a first bearing 3. The first bearing 3 ensures that the first rotating shaft 4 does not affect the linear stepper motor 1 during rotation. A dust cover 7 prevents dust contamination. During the grinding process, an eccentric vibration motor 23 is started. The impact and vibration generated by the eccentric motion quickly crush the abrasive, improving the crushing efficiency of large particles. A shock-absorbing spring 43 is installed in the first limit groove 81, which can absorb 80%~90% of the upward vibration, ensuring stable operation of the equipment. The ground and crushed abrasive enters the ultrasonic vibrating screen 13 through the discharge port 12 and is directly screened into finished products of different particle sizes through multiple continuous particle size screens 14.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A grinding and screening machine for abrasive production, characterized in that... The system includes a support frame, a grinding chamber mounted on the support frame, a feed inlet on one side of the grinding chamber, a discharge outlet at the bottom, and a screening unit located below the grinding chamber. Inside the grinding chamber is a grinding unit, which includes an upper grinding disc and a lower grinding disc mounted in the lower part of the grinding chamber. The upper grinding disc is conical, and the lower grinding disc has a conical groove matching the upper grinding disc. A discharge port penetrating the disc body is located in the middle of the lower grinding disc. The upper grinding disc is connected to a drive unit, which includes a geared motor, a linear stepper motor, and a first rotating shaft. The lower end of the first rotating shaft passes through the grinding chamber and connects to the upper grinding disc, while the upper end connects to a mounting plate via a first bearing. The output shaft of a linear stepper motor is connected to the upper end of the bracket. A first spur gear is provided on the first rotating shaft. On one side of the first rotating shaft, a second rotating shaft is mounted on the bracket via a second bearing. A second spur gear that meshes with the first spur gear is mounted on the second rotating shaft. A second pulley is mounted on one end of the second rotating shaft. A geared motor is mounted on the outer side of the bracket. A first pulley is mounted on the output shaft of the geared motor. A belt is provided between the first pulley and the second pulley. The screening unit is an ultrasonic vibrating screen. Multiple screens are installed inside the ultrasonic vibrating screen. A tray and an ultrasonic vibration generator are provided at the bottom of the ultrasonic vibrating screen.

2. A grinding and screening machine for abrasive production according to claim 1, characterized in that... An eccentric vibration motor is embedded inside the upper grinding disc. The upper grinding disc is connected to the first rotating shaft via a connecting body. The upper grinding disc and the connecting body are connected by a shock-absorbing mechanism. The connecting body is a conical structure symmetrical to the upper grinding disc. The edges of the connecting body and the upper grinding disc are respectively provided with multiple corresponding first and second limiting grooves. The cross-section of the first limiting groove is T-shaped, and the cross-section of the second limiting groove is an inverted T-shape. After the first and second limiting grooves are aligned, they form a limiting groove with an I-shaped cross-section. The shock-absorbing mechanism includes a shock-absorbing strip with an I-shaped cross-section. The shock-absorbing strip is inserted into two aligned first and second limiting grooves to connect the upper grinding disc and the connecting body together. The shock-absorbing strip includes an upper horizontal plate, a middle connecting plate, and a lower horizontal plate. The bottom surface of the upper horizontal plate, located in the first limiting groove, has symmetrically downward protruding limiting posts on both sides of the middle connecting plate. Each limiting post is fitted with a shock-absorbing spring, and the lower end of the shock-absorbing spring is provided with a shock-absorbing plate.

3. A grinding and screening machine for abrasive production according to claim 1, characterized in that... The upper grinding disc is divided into an outer coarse grinding zone and an inner fine grinding zone.

4. A grinding and screening machine for abrasive production according to claim 1, characterized in that... The sieves are arranged from top to bottom in order of particle size from coarse to fine.

5. A grinding and screening machine for abrasive production according to claim 1, characterized in that... Rollers are provided at the bottom of the support frame and the bottom of the ultrasonic vibrating screen.

Images