A grinding device for paint production

Abstract

The application provides a grinding device for paint production, relates to the technical field of paint grinding, and comprises a cylinder and a grinding shaft, wherein the grinding shaft is driven by a driving mechanism, a filter disc is installed on the grinding shaft, and the cylinder is divided into a primary grinding cavity and a secondary grinding cavity; a plurality of grinding rods are installed on the grinding shaft in the primary grinding cavity, and a plurality of grinding discs are installed on the grinding shaft in the secondary grinding cavity; a reflux pipe is connected between the primary grinding cavity and the secondary grinding cavity, and a screw conveyor is installed in the reflux pipe. After large-particle materials in the primary grinding cavity are ground, the large-particle materials can enter the secondary grinding cavity to continue grinding through the filter disc; small-particle materials that do not meet the fineness requirement in the secondary grinding cavity can flow back to the primary grinding cavity to be ground again through the reflux pipe and enter the secondary grinding cavity through the filter disc, so that the circulation of the small-particle materials is realized, the flowability of the materials in the primary grinding cavity is improved, and the phenomenon of material blockage and heating is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paint grinding technology, and particularly relates to a grinding device for paint production. BACKGROUND

[0002] Paint is a material coated on the surface of an object to be protected or decorated, and can form a continuous film firmly attached to the object to be painted. It is usually made of resin, oil or emulsion, with or without pigments, fillers, and appropriate additives, and is prepared with organic solvents or water. The production process of paint usually includes the steps of pre-dispersion, grinding, mixing adjustment, color matching, detection, filtration and packaging. Among them, grinding is to refine and uniformly disperse solid particles such as pigments and fillers in the base material through a grinding device.

[0003] Horizontal sand mill is a commonly used grinding equipment for producing architectural paint such as latex paint, and its grinding medium is usually glass balls, because its hardness is moderate and will not contaminate latex paint. During grinding, the material and grinding medium are stirred by a high-speed rotating grinding disc, so that the pigment and filler agglomerate particles are gradually depolymerized or crushed to the required fineness.

[0004] For example, the patent document with publication number CN214554073U discloses a horizontal sand mill. The horizontal sand mill includes a base, a sand mill cylinder is arranged on the base, an inlet pipe and an outlet pipe are arranged on the sand mill cylinder, a rotating shaft is rotatably connected in the sand mill cylinder, a plurality of grinding discs are connected to the rotating shaft, and a driving mechanism for driving the rotating shaft to rotate is arranged on the base. Liquid material enters the sand mill cylinder through the inlet pipe, and the rotating shaft and the grinding discs are driven by the driving mechanism to rotate at high speed, so as to wet grind the liquid material. The ground liquid material is discharged through the outlet pipe.

[0005] However, when the horizontal sand mill is working, the grinding medium rotates and rolls at high speed in the cylinder body, and the grinding medium rubs against the material, the inner wall of the cylinder body and the grinding disc and other components. This friction generates a large amount of heat, which easily causes the horizontal sand mill to heat up, affecting the service life of the horizontal sand mill. In order to improve the heating condition of the horizontal sand mill, the patent document with publication number CN118204162B discloses a horizontal sand mill for grinding material in sections. The horizontal sand mill is provided with a primary grinding chamber and a secondary grinding chamber. The material enters the primary grinding chamber of the grinding device, the large-particle-size raw material is preliminarily crushed in the primary grinding chamber, and then reaches the secondary grinding chamber and rotates with the rotating shaft to enter the secondary grinding chamber and further crushed in the secondary grinding chamber. By arranging the sectional grinding chamber, the grinding speed and grinding force of the primary grinding chamber are smaller than those of the secondary grinding chamber, thereby reducing the blockage and serious heating caused by the excessive large particle size and strong force when the device is initially put into use.

[0006] However, the particles in the primary grinding chamber are relatively large, and there is a large contact area and rough surface between the particles. When the material moves in the sand mill, the friction between the particles increases, which hinders the smooth flow of the material, causing the movement of the grinding medium in the cylinder to be hindered, and the grinding medium cannot be uniformly dispersed in the material, which further intensifies the collision and friction between the grinding medium and the inner wall of the cylinder, the wheel disc and other components, thereby generating more heat and causing the equipment to heat up. SUMMARY

[0007] Therefore, the present application provides a grinding device for paint production, which solves the technical problem of equipment heating caused by the high-speed rotation and tumbling of the grinding medium in the cylinder during material grinding in the prior art.

[0008] To solve the above technical problems, the present application provides a grinding device for paint production, which includes a cylinder arranged on a rack, a grinding shaft rotatably installed in the cylinder, the grinding shaft being driven by a driving mechanism, and a filter disc mounted on the grinding shaft, dividing the cylinder into a primary grinding chamber and a secondary grinding chamber.

[0009] A plurality of grinding rods are installed on the grinding shaft in the primary grinding chamber, and a plurality of grinding discs are installed on the grinding shaft in the secondary grinding chamber.

[0010] A reflux pipe is connected between the primary grinding chamber and the secondary grinding chamber, and an auger is installed in the reflux pipe to allow the material in the secondary grinding chamber to enter the primary grinding chamber, the auger being driven by the driving mechanism.

[0011] By using the above technical solution, large particle materials are transported to the primary grinding chamber for grinding, and small particle materials are transported to the secondary grinding chamber for grinding. The ground material in the primary grinding chamber can pass through the filter disc and enter the secondary grinding chamber for further grinding. The primary grinding chamber is equipped with multiple grinding rods for preliminary coarse grinding and dispersion of the paint raw materials. The design of the grinding rods allows the material to be refined to some extent before entering the secondary grinding chamber, laying a foundation for subsequent fine grinding. The secondary grinding chamber is equipped with multiple grinding discs, which can further grind the material to achieve smaller particle size distribution and higher grinding accuracy. The design of the staged grinding allows the material to be gradually refined, improves the grinding efficiency, and reduces the phenomenon of material blockage and cylinder heating.

[0012] The grinding rods are arranged in the primary grinding chamber, and the structure of the grinding rods makes them more advantageous when facing materials containing large particles. The longer shape provides a larger range of action, which can better push the large particle material to move in the grinding chamber, making it easier for the large particle material to contact and grind with the grinding medium. At the same time, the movement mode of the grinding rod can reduce the jamming and accumulation of large particle materials in the equipment.

[0013] The reflux pipe is connected with the first grinding cavity and the second grinding cavity, so that the material in the second grinding cavity which does not reach the fineness requirement can flow back to the first grinding cavity for regrinding. This design avoids waste of the material and improves the utilization rate of the material. Since the material in the first grinding cavity has a large particle size and poor flowability, the material in the second grinding cavity has a relatively small particle size and better flowability, and the circulating material in the second grinding cavity can improve the flowability of the material in the first grinding cavity, thereby facilitating reduction of the material blocking and heat generation.

[0014] The auger is installed in the reflux pipe and is driven by the driving mechanism, and can actively transport the material in the second grinding cavity to the first grinding cavity. The design of the auger not only improves the reflux efficiency of the material, but also facilitates improvement of the uniformity and stability of the material in the reflux process.

[0015] The filter disc can avoid the large grinding medium and the material in the first grinding cavity from flowing into the second grinding cavity, thereby causing the second grinding cavity to be blocked.

[0016] Preferably, the grinding rod comprises a rod body I installed on the grinding shaft and a rod body II ball-jointed with the rod body I, and a reset spring is further connected between the rod body I and the rod body II.

[0017] By adopting the above technical scheme, the rod body I and the rod body II are connected in a ball-joint manner, which allows the rod body II to freely rotate in multiple directions, so that the grinding rod can flexibly adjust the grinding angle and direction according to the surface shape and unevenness of the material. This self-adaptive capability facilitates uniform contact with the surface of the material in the grinding process, thereby improving the grinding quality. Since the grinding rod can better adapt to the surface of the material, the number of repeated grinding due to uneven grinding is reduced. Meanwhile, the presence of the reset spring enables the grinding rod to quickly return to the initial position after being subjected to external force, thereby maintaining the stability of the grinding process and improving the overall grinding efficiency.

[0018] Since the first grinding cavity is filled with large-particle material and grinding medium, when the grinding rod contacts the grinding medium, the grinding medium may exert force on the grinding rod from different directions due to irregular movement of the grinding medium in the material and contact with the grinding rod. The ball-joint design allows the rod body II to automatically adjust its angle according to the direction of the force exerted by the grinding medium, thereby avoiding formation of a rigid blocking state with the grinding medium, and facilitating smooth grinding of the material. When the grinding medium and the grinding rod are blocked, the relative movement between them and the cylinder wall is hindered, and the friction force increases sharply. The increased friction force causes more mechanical energy to be converted into heat energy, thereby causing the temperature of the cylinder wall to rise.

[0019] Preferably, the filter disc is provided with a plurality of filter holes, and the plurality of filter holes are arranged in a plurality of concentric annular shapes on the filter disc. The filter disc is provided with a plurality of guide covers on the side close to the primary grinding cavity and at the positions of the filter holes. The opening direction of the guide cover is opposite to the rotating direction of the filter disc.

[0020] By adopting the above technical scheme, when the filter disc rotates, the guide cover generates a pushing force on the material in the primary grinding cavity in the direction of the filter hole, accelerating the flow of the material to the secondary grinding cavity. This reduces the residence time of the material in the primary grinding cavity, so that more material can enter the secondary grinding cavity in time for further grinding, thereby improving the grinding efficiency.

[0021] Since the small-particle material in the primary grinding cavity has better flowability, under the pushing force of the guide cover, the small-particle material is more likely to pass through the filter hole and enter the secondary grinding cavity, thereby facilitating the improvement of the flowability of the material in the primary grinding cavity. The guide cover can change the flow direction and speed of the large-particle material, so that the large-particle material can be more uniformly distributed on the surface of the filter disc, rather than being concentrated near the filter hole. At the same time, the guide cover can also promote the flow of the material around the filter hole and timely remove the large-particle material that may be accumulated, thereby facilitating the reduction of the phenomenon of filter hole blockage.

[0022] Preferably, the grinding disc is triangular, and adjacent two grinding discs have an angular deflection. The grinding disc is provided with a plurality of grinding holes.

[0023] By adopting the above technical scheme, compared with the traditional circular shape, the edge of the triangular grinding disc is more irregular. When the grinding disc rotates in the cylinder, the triangular grinding disc can make the movement track of the material and grinding medium more complex. The angular deflection between adjacent two grinding discs further destroys the conventional flow pattern of the material and grinding medium, so that the material and grinding medium can collide and rub with each other more frequently, increasing the contact opportunities between them, thereby improving the grinding efficiency.

[0024] During the grinding process, the material may agglomerate, affecting the grinding effect. The complex flow and shear force generated by the triangular grinding disc and the angular deflection can effectively break the agglomerates of the material, so that the material participates in the grinding in a more dispersed state, thereby helping to improve the uniformity and efficiency of the grinding.

[0025] The grinding hole not only facilitates the passage of the material and the grinding medium, but also facilitates the cleaning of the grinding disc during equipment maintenance.

[0026] Preferably, a shell is installed on the outside of the cylinder, and a cooling cavity is left between the shell and the cylinder. The cooling cavity is filled with cooling liquid.

[0027] By adopting the technical scheme, in the grinding process, the grinding medium collides and rubs with the material, the inner wall of the cylinder and other components, and these mechanical actions generate a large amount of heat, which causes the temperature in the cylinder to rise sharply. The cooling liquid filled in the cooling cavity between the shell and the cylinder can timely absorb the heat, which is conducive to reducing the temperature of the cylinder.

[0028] Preferably, the rod body one, the grinding disc and the grinding shaft are connected through keys, a plurality of shaft sleeves one are arranged on the grinding shaft at intervals in the primary grinding cavity, the grinding rod is located between adjacent two shaft sleeves one, a plurality of shaft sleeves two are arranged on the grinding shaft at intervals in the secondary grinding cavity, the grinding disc is located between adjacent two shaft sleeves two, and the end portion of the grinding shaft is provided with an end portion shaft sleeve, and the end portion shaft sleeve and the grinding shaft are connected through bolts.

[0029] By adopting the technical scheme, the rod body one, the grinding disc and the grinding shaft are connected through keys, the keys can transmit torque between the shaft and the rotating component. The grinding rod is located between adjacent two shaft sleeves one, so that the grinding rod can be uniformly distributed in the primary grinding cavity, the contact area between the grinding rod and the material is increased, and the grinding efficiency is improved. Meanwhile, the shaft sleeve one can also position and support the grinding rod.

[0030] The grinding disc is located between adjacent two shaft sleeves two, so that the grinding disc can be arranged at a certain interval in the secondary grinding cavity to form a plurality of grinding areas. After the material is preliminarily ground in the primary grinding cavity, the material enters the secondary grinding cavity and is further ground between different grinding discs, so that the grinding fineness of the material is improved. The shaft sleeve two can also isolate and protect the grinding disc, reducing the mutual interference and wear between the grinding discs.

[0031] In the assembly process, the grinding rod, the grinding disc, the end portion shaft sleeve and other components can be conveniently assembled on the grinding shaft. When the equipment needs to be maintained or the components need to be replaced, the components can also be easily disassembled, reducing the maintenance time and cost. By adjusting the positions of the shaft sleeve one and the shaft sleeve two on the grinding shaft, the distance between the grinding rod and the grinding disc can be conveniently changed to adapt to the grinding requirements of different materials.

[0032] Preferably, a support sleeve is mounted on the rack, and the end of the grinding shaft away from the end portion shaft sleeve penetrates through the support sleeve.

[0033] By adopting the technical scheme, the support sleeve can provide strong support for the grinding shaft, reduce the bending or deformation of the grinding shaft due to uneven stress during operation, and limit the radial displacement of the grinding shaft to reduce vibration and shaking. In the high-speed rotation process, even a small vibration can cause the gap between the grinding components to change, affecting the grinding effect. The presence of the support sleeve enables the grinding shaft to maintain a relatively stable rotation track, improving the operation accuracy and stability of the equipment.

[0034] Preferably, the material inlet one is arranged on the barrel body in the first-stage grinding cavity, the material inlet two and the material outlet are arranged on the barrel body in the second-stage grinding cavity, and the filter screen is arranged at the material outlet.

[0035] By adopting the above technical scheme, the small-particle material enters the second-stage grinding cavity through the material inlet two for grinding, the large-particle material enters the first-stage grinding cavity through the material inlet one for grinding, and then enters the second-stage grinding cavity through the filter disc for further grinding, and the material meeting the particle size requirement is discharged through the filter screen, which is beneficial to improving the grinding efficiency. Compared with the case that both the large-particle and small-particle materials enter the first-stage grinding cavity, this design is also beneficial to reducing the blockage of the first-stage grinding cavity, thereby being beneficial to improving the grinding efficiency.

[0036] Preferably, the mounting table is arranged on the rack, the slide rail is arranged on the mounting table, the mounting frame is arranged on the shell, and the roller capable of sliding along the slide rail is rotatably connected to the mounting frame.

[0037] By adopting the above technical scheme, the shell can be flexibly moved relative to the rack through the roller sliding along the slide rail. During equipment installation, the shell can be preliminarily positioned on the rack through the cooperation of the roller and the slide rail, and then other components can be connected and fixed. Compared with the traditional fixed installation mode, this design reduces the positioning difficulty and adjustment time during installation, and improves the installation efficiency.

[0038] Preferably, the driving mechanism comprises a driving motor arranged on the rack, a synchronous belt one connected between the output shaft of the driving motor and the grinding shaft, and a synchronous belt two connected between the grinding shaft and the central shaft of the auger.

[0039] By adopting the above technical scheme, the driving motor drives the grinding shaft to rotate through the synchronous belt one, and then drives the grinding rod and the grinding disc to rotate, so as to realize the grinding of the material. The grinding shaft drives the auger to rotate through the synchronous belt two, so as to convey the material in the second-stage grinding cavity to the first-stage grinding cavity, which is beneficial to improving the flowability of the material in the first-stage grinding cavity, thereby being beneficial to reducing the material blockage and heating phenomenon.

[0040] The beneficial effects of the above technical scheme of the present application are as follows:

[0041] 1. The present application is provided with a first-stage grinding cavity and a second-stage grinding cavity, the large-particle material in the first-stage grinding cavity can enter the second-stage grinding cavity through the filter disc for further grinding after being ground, which improves the grinding efficiency while reducing the material blockage and heating phenomenon of the barrel body; the small-particle material in the second-stage grinding cavity that does not meet the fineness requirement can flow back to the first-stage grinding cavity through the backflow pipe for re-grinding and then enter the second-stage grinding cavity through the filter disc, realizing the circulation of the small-particle material, which can improve the flowability of the material in the first-stage grinding cavity, thereby being beneficial to reducing the material blockage and heating phenomenon.

[0042] 2. The grinding rod is installed on the grinding shaft in the primary grinding chamber, the rod body one and the rod body two of the grinding rod are connected by ball joint and are connected with a return spring, the design allows the rod body two to automatically adjust the angle according to the direction of the force applied by the grinding medium, avoids the rigid jamming state with the grinding medium, thus is beneficial to the smooth grinding of the material, and reduces the heating of the cylinder caused by the increased friction force when the grinding medium and the grinding rod are jammed.

[0043] 3. The filter hole of the filter disc is provided with a guide cover, the guide cover can accelerate the flow of small particle materials to the secondary grinding chamber, is beneficial to improve the fluidity of the materials in the primary grinding chamber, thus is beneficial to reduce the jamming and heating phenomenon, and can change the flow direction and speed of the large particle materials, and reduces the blockage of the filter hole by the large particle materials. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is the structure schematic view of the grinding device for the paint production of the application;

[0045] Figure 2 It is the side view of the grinding device for the paint production of the application;

[0046] Figure 3 It is the sectional view of the grinding device for the paint production of the application;

[0047] Figure 4 It is the structure schematic view of the grinding rod of the application; Figure 3 It is the enlarged view of A in the application;

[0048] Figure 5 It is the enlarged view of B in the application; Figure 3 It is the enlarged view of B in the application;

[0049] Figure 6 It is the structure schematic view of the grinding shaft of the application;

[0050] Figure 7 It is the sectional view of the grinding rod of the application.

[0051] In the figure: 1, frame; 11, support sleeve; 12, mounting table; 13, slide rail; 2, barrel; 21, first-stage grinding cavity; 211, material inlet one; 22, second-stage grinding cavity; 221, material inlet two; 222, material outlet; 3, grinding shaft; 31, filter disc; 311, filter hole; 312, guide cover; 32, grinding rod; 321, rod body one; 322, rod body two; 323, return spring; 324, groove one; 325, groove two; 326, ball head; 327, mounting ring; 33, grinding disc; 331, grinding hole; 34, shaft sleeve one; 35, shaft sleeve two; 36, end shaft sleeve; 361, bolt; 4, driving mechanism; 41, driving motor; 42, synchronous belt one; 43, synchronous belt two; 44, pulley; 5, return pipe; 51, auger; 52, connecting rod; 6, housing; 61, cooling liquid inlet; 62, cooling liquid outlet; 63, mounting bracket; 64, roller. DETAILED DESCRIPTION

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will combine the objectives, technical solutions, and advantages of the embodiments of the present application with the Figures 1-7 The technical solutions of the embodiments of the present application are described clearly and completely.

[0053] EMBODIMENT

[0054] The present embodiment provides a grinding device for paint production, which is used for wet grinding. As shown in Figure 1 and Figure 3 , the grinding device comprises a frame 1, a barrel 2 mounted on the frame 1, and a grinding shaft 3 rotationally connected in the barrel 2, which is driven by a driving mechanism 4.

[0055] As shown in Figure 2 and Figure 3 , a housing 6 is mounted on the outer side of the barrel 2, the axis of the housing 6 is collinear with the axis of the barrel 2, a cooling cavity is left between the housing 6 and the barrel 2, and the cooling cavity is filled with cooling liquid. One end of the housing 6 is provided with a cooling liquid inlet 61, and the other end is provided with a cooling liquid outlet 62. The barrel 2 can be cooled by circulating the cooling liquid.

[0056] As shown in Figure 3 , a support sleeve 11 is mounted on the frame 1, the support sleeve 11 is located at one end of the barrel 2, one end of the grinding shaft 3 penetrates the one end of the barrel 2 and the support sleeve 11 in sequence, and a bearing is connected between the support sleeve 11 and the grinding shaft 3. The axis of the support sleeve 11, the grinding shaft 3, and the barrel 2 are collinear.

[0057] As shown in Figure 3 , the support sleeve 11 can provide strong support for the grinding shaft 3, reduce the bending or deformation of the grinding shaft 3 due to uneven stress during operation, and limit the radial displacement of the grinding shaft 3 to reduce its vibration and shaking.

[0058] As shown in Figure 3 , the filter disc 31 is installed on the grinding shaft 3, the axis of the filter disc 31 is collinear with the axis of the grinding shaft 3, and the filter disc 31 divides the cylinder 2 into a primary grinding cavity 21 and a secondary grinding cavity 22.

[0059] As shown in Figure 3 , the cylinder 2 is provided with a material inlet one 211 in the primary grinding cavity 21, and the cylinder 2 is provided with a material inlet two 221 and a material outlet 222 in the secondary grinding cavity 22, and the filter screen is arranged at the material outlet 222. The material inlet one 211, the material inlet two 221 and the material outlet 222 all penetrate the side wall of the shell 6.

[0060] As shown in Figure 3 , the small-particle material continuously enters the secondary grinding cavity 22 from the material inlet two 221 for grinding, the large-particle material continuously enters the primary grinding cavity 21 from the material inlet one 211 for grinding, and then enters the secondary grinding cavity 22 through the filter disc 31 for further grinding, and the material meeting the particle size requirement continuously passes through the filter screen and is discharged from the material outlet 222.

[0061] As shown in Figure 3 , a plurality of grinding rods 32 are installed on the grinding shaft 3 in the primary grinding cavity 21, and the grinding rods 32 are uniformly distributed in the circumferential direction of the grinding shaft 3. The grinding rods 32 can better push the large-particle material to move in the grinding cavity, so that the large-particle material is more easily contacted with the grinding medium and ground. At the same time, the movement mode of the grinding rod 32 can reduce the jamming and accumulation of the large-particle material in the equipment.

[0062] As shown in Figure 7 , the grinding rod 32 comprises a rod body one 321 installed on the grinding shaft 3 and a rod body two 322 ball-jointed with the rod body one 321, and a reset spring 323 is further connected between the rod body one 321 and the rod body two 322.

[0063] Specifically, as shown in Figure 7 , the rod body one 321 is connected with a ball head 326 at one end close to the rod body two 322, the rod body one 321 is provided with a groove one 324 at one end close to the ball head 326, the groove one 324 penetrates the ball head 326, the rod body two 322 is provided with a groove two 325 at one end close to the rod body one 321, the ball head 326 is rotationally connected in the groove two 325, one end of the reset spring 323 is connected with the groove two 325, the other end of the reset spring 323 is connected with the groove one 324, and the reset spring 323 is a torsional spring.

[0064] As shown in Figure 7As shown, this design allows the rod body two 322 to automatically adjust its angle according to the direction of the force exerted by the grinding medium, avoiding the formation of a rigid jamming state with the grinding medium, thereby facilitating the smooth progress of material grinding, while reducing the phenomenon of heating of the cylinder body 2 due to the increased friction force when the grinding medium and grinding rod 32 are jammed.

[0065] As shown in Figure 3 and Figure 6 shown, a plurality of grinding discs 33 are installed on the grinding shaft 3 inside the secondary grinding cavity 22; the grinding disc 33 is triangular, and adjacent two grinding discs 33 have angular deflection, that is, along the axial direction of the grinding shaft 3, adjacent two grinding discs 33 do not coincide, and the grinding disc 33 is provided with a plurality of grinding holes 331.

[0066] As shown in Figure 3 and Figure 6 shown, when the grinding disc 33 rotates in the cylinder body 2, the triangular grinding disc 33 can stir the movement trajectory of the material and the grinding medium more complex. The angular deflection between adjacent two grinding discs 33 further destroys the conventional flow pattern of the material and the grinding medium, so that the material and the grinding medium can collide and rub with each other more frequently, increasing the contact opportunity between them, thereby improving the grinding efficiency.

[0067] As shown in Figure 3 and Figure 7 shown, the rod body one 321, the grinding disc 33, the filter disc 31 and the grinding shaft 3 are connected by keys. Specifically, the rod body one 321 is installed on the mounting ring 327, the mounting ring 327 is sleeved on the grinding shaft 3, the grinding disc 33 and the filter disc 31 are sleeved on the grinding shaft 3, the grinding shaft 3 is provided with a key groove, and the mounting ring 327, the grinding disc 33 and the filter disc 31 are provided with keys matched with the key groove.

[0068] As shown in Figure 3 and Figure 4 shown, a plurality of shaft sleeves one 34 are arranged on the grinding shaft 3 inside the primary grinding cavity 21, and the grinding rod 32 is located between adjacent two shaft sleeves one 34. A plurality of shaft sleeves two 35 are arranged on the grinding shaft 3 inside the secondary grinding cavity 22, and the grinding disc 33 is located between adjacent two shaft sleeves two 35. The filter disc 31 is located between adjacent two shaft sleeves one 34 and shaft sleeves two 35. The end portion of the grinding shaft 3 is provided with an end portion shaft sleeve 36, and the end portion shaft sleeve 36 and the grinding shaft 3 are connected by bolts 361.

[0069] As shown in Figure 3 and Figure 4 shown, during assembly, the grinding rod 32, the grinding disc 33, the end portion shaft sleeve 36 and other components can be conveniently installed on the grinding shaft 3. When the equipment needs to be maintained or the components need to be replaced, these components can also be easily disassembled, reducing the maintenance time and cost.

[0070] As shown in Figure 3 and Figure 5 , a reflux pipe 5 is communicated between the primary grinding cavity 21 and the secondary grinding cavity 22, the reflux pipe 5 is located at the lower part of the barrel 2, and an auger 51 is rotatably installed in the reflux pipe 5 to make the material in the secondary grinding cavity 22 enter the primary grinding cavity 21, and the auger 51 is driven by the driving mechanism 4.

[0071] As shown in Figure 3 and Figure 5 , the reflux pipe 5 is communicated between the primary grinding cavity 21 and the secondary grinding cavity 22, so that the material in the secondary grinding cavity 22 that does not meet the fineness requirement can reflux to the primary grinding cavity 21 for regrinding and enter the secondary grinding cavity 22 through the filter disc 31 to realize the circulating flow of the small-particle material. Since the particle size of the material in the primary grinding cavity 21 is relatively large and the flowability is poor, the particle size of the material in the secondary grinding cavity 22 is relatively small and the flowability is better, and the circulating material in the secondary grinding cavity 22 can improve the flowability of the material in the primary grinding cavity 21, thereby being beneficial to reducing the material blocking and heat generation.

[0072] As shown in Figure 3 , the driving mechanism 4 includes a driving motor 41 arranged on the frame 1, a synchronous belt one 42 connected between the output shaft of the driving motor 41 and the grinding shaft 3, and a synchronous belt two 43 connected between the grinding shaft 3 and the central shaft of the auger 51.

[0073] As shown in Figure 3 and Figure 5 , a connecting rod 52 is rotatably connected to one end of the central shaft of the auger 51 on the frame 1, the connecting rod 52 is connected with the central shaft of the auger 51 through a shaft coupling, and a pulley 44 is arranged on the end of the connecting rod 52, the end of the grinding shaft 3 and the output shaft of the driving motor 41. The synchronous belt one 42 is drivingly connected between the pulley 44 on the grinding shaft 3 and the pulley 44 on the output shaft of the driving motor 41, and the synchronous belt two 43 is drivingly connected between the pulley 44 on the grinding shaft 3 and the pulley 44 on the connecting rod 52.

[0074] As shown in Figure 3 and Figure 5 , the driving motor 41 drives the grinding shaft 3 to rotate through the synchronous belt one 42, and then drives the grinding rod 32 and the grinding disc 33 to rotate, thereby realizing the grinding of the material. The grinding shaft 3 drives the auger 51 to rotate through the synchronous belt two 43 to transport the material in the secondary grinding cavity 22 to the primary grinding cavity 21, which is beneficial to improving the flowability of the material in the primary grinding cavity 21, thereby being beneficial to reducing the material blocking and heat generation.

[0075] As shown in Figure 6As shown, the filter disc 31 is provided with a plurality of filter holes 311, the plurality of filter holes 311 form a ring structure, along the radial direction of the filter disc 31, a plurality of concentric ring structures are formed, the side of the filter disc 31 close to the primary grinding cavity 21 and located at the part of the filter hole 311 is provided with a plurality of guide covers 312, the opening direction of the guide cover 312 is opposite to the rotating direction of the filter disc 31. That is, the filter disc 31 rotates clockwise, and the opening direction of the guide cover 312 on the ring structure of the filter hole 311 is distributed along the counterclockwise direction.

[0076] As shown in Figure 3 and Figure 6 When the filter disc 31 rotates, the guide cover 312 will generate a pushing force on the material in the primary grinding cavity 21 in the direction of the filter hole 311, accelerating the flow of the material to the secondary grinding cavity 22. Because the small particle material in the primary grinding cavity 21 has better flowability, under the action of the pushing force of the guide cover 312, the small particle material is more easily passed through the filter hole 311 and enters the secondary grinding cavity 22, thereby facilitating the improvement of the flowability of the material in the primary grinding cavity 21.

[0077] As shown in Figure 3 and Figure 6 The guide cover 312 can change the flow direction and speed of the large particle material, so that the large particle material can be more uniformly distributed on the surface of the filter disc 31, rather than concentrated near the filter hole 311. At the same time, the guide cover 312 can also promote the flow of the material around the filter hole 311 and timely remove the large particle material that may be accumulated, thereby facilitating the reduction of the phenomenon of large particle material blocking the filter hole 311.

[0078] As shown in Figure 1 The rack 1 is provided with a mounting table 12, the mounting table 12 is provided with a sliding rail 13, the shell 6 is provided with a mounting frame 63, and the mounting frame 63 is rotatably connected with a roller 64 capable of sliding along the sliding rail 13. The length direction of the sliding rail 13 is parallel to the axial direction of the shell 6. During equipment installation, the shell 6 can be preliminarily positioned on the rack 1 through the cooperation of the roller 64 and the sliding rail 13, and then other components can be connected and fixed.

[0079] The implementation principle of the grinding device for paint production in the embodiment is as follows:

[0080] The small particle material continuously enters the secondary grinding cavity 22 from the material inlet two 221 for grinding, the large particle material continuously enters the primary grinding cavity 21 from the material inlet one 211 for grinding, and then enters the secondary grinding cavity 22 through the filter disc 31 for further grinding, and the material meeting the particle size requirement continuously passes through the filter screen and is discharged from the material outlet 222, thereby improving the grinding efficiency and reducing the phenomenon of material blocking and the heating of the cylinder 2.

[0081] The material that does not reach the required fineness in the secondary grinding chamber 22 can enter the return pipe 5, and is returned to the primary grinding chamber 21 for regrinding by the screw conveyor 51, and enters the secondary grinding chamber 22 through the filter disc 31, so that the circulation of the small-particle material is realized. Since the material in the primary grinding chamber 21 has a large particle size and poor flowability, the material in the secondary grinding chamber 22 has a relatively small particle size and better flowability, and the circulation of the material in the secondary grinding chamber 22 can improve the flowability of the material in the primary grinding chamber 21, thereby reducing the material blocking and heat generation.

[0082] In addition, it should be noted that, in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or connected through an intermediate medium.

Claims

1. A grinding device for paint production, comprising a barrel arranged on a frame, a grinding shaft rotatably mounted in the barrel, the grinding shaft being driven by a drive mechanism, characterized in that: The filter disc is installed on the grinding shaft, and divides the cylinder into a first grinding cavity and a second grinding cavity; the first material inlet is arranged in the first grinding cavity, and the second material inlet and the material outlet are arranged in the second grinding cavity. The grinding rod is installed in the first grinding cavity, and comprises a rod body one and a rod body two which are connected by a return spring. The grinding disc is installed in the second grinding cavity. The return pipe is arranged between the first grinding cavity and the second grinding cavity, and the auger is installed in the return pipe. The filter disc is provided with a plurality of filter holes which are arranged in a plurality of concentric annular shapes.

2. The grinding device for paint production according to claim 1, characterized in that: The grinding disc is triangular, and the adjacent two grinding discs are offset by an angle.

3. The paint production grinding device according to claim 2, characterized in that: The cylinder is provided with the shell, and the cooling cavity is arranged between the shell and the cylinder.

4. The paint production grinding device according to claim 3, characterized in that: The rod body one, the grinding disc and the grinding shaft are connected by the key.

5. The paint production grinding device according to claim 4, characterized in that: The end of the grinding shaft is provided with the end shaft sleeve, and the end shaft sleeve and the grinding shaft are connected by the bolt.

6. The paint production grinding device according to claim 5, characterized in that: The support sleeve is arranged on the frame.

7. A paint production grinding device according to claim 6, characterized in that: The installation table is arranged on the frame, and the slide rail is arranged on the installation table. The installation frame is arranged on the shell, and the roller which can slide along the slide rail is rotatably connected to the installation frame. The driving mechanism comprises the driving motor arranged on the frame, the synchronous belt one connected between the output shaft of the driving motor and the grinding shaft, and the synchronous belt two connected between the grinding shaft and the central shaft of the auger.

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