Low-loss porcelain clay grinding and dynamic screening equipment and process for insulator production

Abstract

The present invention discloses a low-loss porcelain clay grinding and dynamic screening equipment and process for insulator production, which includes an equipment main body, a grinding component and a screening component. The grinding cone is driven to rotate by a motor, and at the same time, the grinding cone is transmitted to a transmission ring through a transmission gear to drive the separation sleeve to rotate. The porcelain clay passes through a feed hole and is intermittently fed to the top of a feed plate. A part of the porcelain clay subjected to centrifugal force and gravity passes through a screening net and enters the bottom of a screening cavity, and a part of the porcelain clay is screened layer by layer by the feed plate and enters area A for grinding. The screened porcelain clay is slowly transported to the area for grinding by the rotating feed plate. At the same time, the air flow is blown into the grinding cavity through the screening component and guided by the grinding groove to bring the fine powder in area A and inside the screening net out of the screening net, thereby promoting the screening of the particles after grinding, reducing the agglomeration of porcelain clay, and avoiding clogging of the screen holes.

Description

Technical Field

[0001] The present invention relates to the technical field of insulator preparation equipment, and in particular to a low-loss porcelain clay grinding and dynamic screening equipment and process for insulator production. Background Art

[0002] In the insulator production process, the grinding and screening of porcelain clay are important processes that determine key indicators such as the mechanical strength and electrical insulation performance of insulators. However, porcelain clay has an irregular shape, high hardness and a certain degree of toughness. The following problems are prone to occur during the grinding and screening process: (1) Severe particle agglomeration: Due to the irregular shape and high surface energy of porcelain clay particles, traditional impact or extrusion grinding methods easily cause particles to stick together to form hard agglomerates, resulting in uneven particle size distribution, which directly affects the dielectric properties of insulators; (2) Low screening efficiency: Irregular particles easily clog the screen during the screening process, resulting in poor dynamic screening continuity, requiring frequent shutdowns for cleaning, and seriously affecting production continuity.

[0003] Patent CN202410841008.4 discloses a stirring mill for producing ceramic insulators, which includes a frame with an outer barrel fixedly connected to the frame. Multiple inner barrels are arranged inside the outer barrel for rotation. The rotation and vibration cause the porcelain clay blocks to collide, squeeze and rub against each other, thereby stirring and grinding the porcelain clay. At the same time, the sieve plate is shaken up and down to prevent blockage.

[0004] However, porcelain clay has high viscosity. When the feed rate is high, the bonding force between particles is far greater than the mechanical force. After grinding, the particle size of the aggregates still exceeds the process requirements. Reducing the feed rate to control the agglomeration rate results in a decrease in unit processing energy efficiency. Furthermore, a grading treatment structure is not designed to address the aggregates. In light of this, the present invention provides low-loss porcelain clay grinding and dynamic screening equipment for insulator production. This equipment utilizes a grading pretreatment mechanism to reduce the load on the main grinding unit and, in conjunction with a multi-force field coordinated screening structure, improves grinding and screening efficiency. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a low-loss porcelain clay grinding and dynamic screening device for insulator production. In the technical solution of the present invention, the device includes a device body, the device body includes a screening chamber, and a transmission mechanism is provided at the top of the screening chamber;

[0006] The grinding assembly includes a motor, a drive shaft, a grinding column and a grinding cone installed on the top of the screening chamber. The upper and lower ends of the grinding column are fixedly connected to the drive shaft and the grinding cone respectively. The motor drives the grinding column and the grinding cone to rotate through the drive shaft;

[0007] The screening assembly includes a connecting ring rotatably connected to the top of the screening chamber, a separator sleeve and a screening net are fixedly connected to both sides of the lower end face of the connecting ring, the lower end of the screening net is fixedly connected to the grinding chamber, the separator sleeve is connected to the drive shaft through a transmission mechanism, the inner diameter of the separator sleeve is equal to the outer diameter of the grinding column, a feed plate is spirally provided on the inner wall of the screening net, the outer edge of the feed plate is fixedly connected to the inner wall of the screening net, the inner edge of the feed plate is rotatably connected to the outer wall of the grinding column, and porcelain clay is fed through the feed port to the upper end face of the feed plate;

[0008] The screening component is installed at the lower end of the grinding chamber. An external air pump blows air into the inner cavity of the grinding chamber through the screening component to screen the porcelain clay.

[0009] Furthermore, in the technical solution of the present invention, the grinding cone has the same shape and size as the inner cavity of the grinding chamber, and a plurality of grinding edges are fixedly connected to the outer wall of the grinding cone in the circumferential direction, and a plurality of grinding grooves are spaced apart in the circumferential direction on the inner wall of the grinding chamber.

[0010] Furthermore, in the technical solution of the present invention, a plurality of groups of feed openings are provided at intervals on the top of the connecting ring, and the feed openings intermittently overlap with the feed openings when the feed openings rotate.

[0011] Furthermore, in the technical solution of the present invention, a mounting groove is provided at the bottom of the inner cavity of the grinding chamber, an air inlet is provided at the bottom of the mounting groove, the diameter of the air inlet gradually increases in the vertical downward direction, and the lower end of the air inlet is rotatably connected to the top of the screening component.

[0012] Furthermore, in the technical solution of the present invention, the screening assembly includes: an air supply plate mounted in the mounting groove, a connecting nozzle rotatably connected to the bottom of the grinding chamber, and a connecting assembly connected to an external air pump;

[0013] The air supply plate includes a sealing cone and an elastic ring which are slidably connected to the inner cavity of the mounting groove. The sealing cone is in the shape of an inverted cone, and the elastic ring is in the shape of a circular ring. The inner side of the elastic ring is fixedly connected to the lower edge of the outer wall of the sealing cone, and the outer edge of the elastic ring is fixedly connected to the top edge of the side wall of the mounting groove.

[0014] Furthermore, in the technical solution of the present invention, a plurality of groups of air outlet holes are provided at intervals on the upper end surface of the elastic ring, and the positions and numbers of the air outlet holes correspond one to one with the grinding grooves.

[0015] Furthermore, in the technical solution of the present invention, a truncated cone-shaped hole is provided at the top of the connecting nozzle, the inner wall shape of the truncated cone-shaped hole is adapted to the outer wall shape of the bottom of the grinding chamber, and a sealing gasket is fixedly connected to the inner wall of the truncated cone-shaped hole.

[0016] Furthermore, in the technical solution of the present invention, the transmission gear ring and the driving gear rotate coaxially, and the speed ratio is 1:20-50.

[0017] A low-loss porcelain clay grinding and dynamic screening process for insulator production, porcelain clay is put in through a feed port, a motor drives the grinding cone to rotate, and at the same time, the transmission is transmitted to the transmission gear ring through a transmission gear to drive the separation sleeve to rotate. When the lower feed port overlaps with the feed hole, porcelain clay is intermittently put into the top of the feed plate, part of the porcelain clay passes through the screening mesh and enters the bottom of the screening cavity, and part of the porcelain clay is screened layer by layer by the feed plate and enters the grinding cavity for grinding. The porcelain clay that does not pass the screening is slowly transported to the grinding cavity for grinding by the rotating feed plate. At the same time, the air flow is blown into the grinding cavity through the screening component, and is guided by the grinding groove to bring out the fine powder in the grinding cavity and inside the screening mesh. The ground and screened porcelain clay is collected in the screening cavity and taken out through the discharge port.

[0018] Effective gain: In the technical solution of the present invention, by setting up a screening assembly, the transmission gear ring is connected to the drive gear through the transmission gear, so that the grinding chamber and the grinding cone rotate in opposite directions, and the corresponding grinding efficiency can be achieved without the need for a strong driving device;

[0019] At the same time, the feeding ports are opened at intervals, so that the porcelain clay can be fed in intermittently. The fed porcelain clay is screened by the screening net, and the porcelain clay that meets the particle size is screened out first, and then screened by the sieve holes of the feeding plate into the grinding chamber to be ground by the grinding cone. The porcelain clay that does not pass the screening of the feeding plate is slowly transported to the grinding chamber by the rotating feeding plate for grinding. By controlling the speed ratio of the feeding plate and the grinding cone, continuous grinding is maintained while the grinding amount is controlled, thereby improving the porcelain clay grinding efficiency and avoiding agglomeration caused by excessive grinding.

[0020] Moreover, air is blown into the air inlet through the connecting nozzle, and the air flow pushes the sealing cone to slide upward along the inner wall of the installation groove, expanding the elastic ring, and the air flow passes through the air outlet and is guided through the grinding groove. When the air flow speed reaches a certain level, the porcelain clay powder attached to the inner wall of the grinding chamber and the fine particles attached to the screen holes of the screening mesh will flow with the air flow, and at the same time, the ultrafine particles are prevented from clogging the screen during the screening process or causing losses in subsequent processing, and powder agglomeration is avoided, thereby increasing the single operation time of the equipment and reducing the frequency of shutdowns.

[0021] Other features and advantages of the present invention will be set forth in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 This is a schematic structural diagram of the low-loss porcelain clay grinding and dynamic screening equipment for insulator production according to the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the equipment of the present invention;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the main body of the device of the present invention;

[0026] Figure 4 Schematic diagram of the grinding assembly structure of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the screening assembly of the present invention;

[0028] Figure 6 For the present invention Figure 5 A is an enlarged structural diagram;

[0029] Figure 7 Schematic diagram of the screening assembly structure of the present invention;

[0030] Figure 8 Schematic diagram of the air supply plate structure of the present invention;

[0031] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B.

[0032] In the figure: 1 equipment body, 11 screening chamber, 12 transmission gear, 13 drive gear, 14 annular groove, 15 air inlet nozzle, 2 grinding assembly, 21 motor, 22 drive shaft, 23 grinding cone, 24 grinding edge, 25 grinding column, 3 screening assembly, 31 grinding chamber, 32 screening net, 33 connecting ring, 34 separation sleeve, 35 transmission gear ring, 36 feeding port, 37 feeding plate, 38 grinding groove, 39 mounting groove, 310 air inlet, 4 screening assembly, 41 air supply plate, 411 elastic ring, 412 sealing frustum, 413 air outlet, 42 air supply pipe, 43 transition pipe, 44 connecting nozzle. DETAILED DESCRIPTION

[0033] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] On one hand, an embodiment of the present invention provides a low-loss porcelain clay grinding and dynamic screening device for insulator production, including a device body 1, a grinding component 2, a screening component 3 and a screening component 4.

[0035] See also Figures 1 to 3The main body 1 of the device includes a screening chamber 11. A transmission assembly is provided at the top of the inner cavity of the screening chamber 11. The transmission assembly includes a driving gear 13 and a transmission gear 12 rotatably connected to the top of the inner cavity of the screening chamber 11, and the transmission gear 12 is engaged with the driving gear 13. An annular groove 14 is also provided at the top of the inner cavity of the screening chamber 11. A feed hole communicating with the outside is provided at the top of the annular groove 14. An air inlet nozzle 15 is fixedly connected to the outer wall of the screening chamber 11.

[0036] The grinding assembly 2 is installed on the top of the screening chamber 11, and the lower end of the grinding assembly 2 extends into the inner cavity of the screening chamber 11 for grinding porcelain clay. The screening assembly 3 is rotatably connected to the inside of the screening chamber 11. The screening assembly 4 is arranged at the bottom of the screening assembly 3 to support the screening assembly 3. The external air pump blows air into the screening assembly 4 through the air inlet nozzle 15. The airflow enters the interior of the screening assembly 3 and passes through the screening assembly 3 to clean the screening assembly 3 to reduce blockage. At the same time, the screening assembly 3 rotates in the opposite direction to the grinding assembly 2. The porcelain clay enters the adjacent area of ​​the grinding assembly 2 and the screening assembly 3 through the feed hole, and the rotating grinding assembly 2 and the screening assembly 3 are ground and screened.

[0037] It should be noted that the grinding assembly 2 and the screening assembly 3 rotate coaxially and in opposite directions, and the rotation speed ratio of the screening assembly 3 to the grinding assembly 2 is 1:20-50.

[0038] See also Figure 4 The grinding assembly 2 includes a motor 21 installed on the top of the screening chamber 11. The driving end of the motor 21 passes through the screening chamber 11 and extends into the interior of the screening chamber 11 and is fixedly connected to a driving shaft 22. The lower end of the driving shaft 22 is fixedly connected to a grinding column 25. The lower end of the grinding column 25 is fixedly connected to a grinding cone 23. The outer wall of the grinding cone 23 is fixedly connected to several groups of grinding edges 24 at circumferential intervals.

[0039] Specifically, the motor 21 drives the driving shaft 22 to rotate, and the grinding cone 23 grinds the porcelain clay. The plurality of groups of grinding edges 24 are provided to improve the grinding efficiency of the porcelain clay.

[0040] It should be added that a discharge port is provided at the lower end of the outer wall of the screening chamber 11 .

[0041] See also Figures 5 and 6The screening assembly 3 includes a connecting ring 33 rotatably connected to the annular groove 14, and a plurality of groups of discharge ports 36 are circumferentially spaced apart at the top of the connecting ring 33. A separation sleeve 34 and a screening net 32 ​​are fixedly connected on both sides of the bottom of the connecting ring 33. The inner diameter of the separation sleeve 34 is equal to the outer diameter of the grinding column 25, and the bottom height of the separation sleeve 34 is lower than the top edge height of the grinding column 25. A transmission gear ring 35 is provided at the upper end of the inner side of the separation sleeve 34, and the transmission gear ring 35 is engaged with the transmission gear 12. The transmission gear ring 35 rotates coaxially with the drive gear 13, and the speed ratio is 1:20-50. The lower end of the screening net 32 ​​is fixedly connected to the grinding chamber 31. The inner shape of the grinding chamber 31 is the same as that of the grinding cone 23, and the inner size of the grinding chamber 31 is adapted to the outer size of the grinding cone 23.

[0042] Specifically, a feed plate 37 is spirally arranged inside the screening net 32, the outer edge of the feed plate 37 is fixedly connected to the inner wall of the screening net 32, and the inner edge of the feed plate 37 is rotatably connected to the outer wall of the grinding column 25. A sieve hole is opened at the upper end of the feed plate 37, and the diameter of the sieve hole decreases layer by layer along the vertical direction downward. The diameter of the sieve hole of the feed plate 37 is larger than the diameter of the sieve hole of the screening net 32.

[0043] It can be understood that the porcelain clay is put in through the feed hole, and as the connecting ring 33 rotates, the porcelain clay intermittently passes through the discharge port 36 and enters the inside of the screening net 32, realizing intermittent feeding. The porcelain clay that meets the screening requirements is subjected to the action of gravity and centrifugal force and passes through the screening net 32 ​​to enter the bottom of the inner cavity of the screening chamber 11. The remaining porcelain clay is screened layer by layer by the feeding plate 37 and falls into the adjacent area A of the grinding cone 23 and the grinding chamber 31. It is ground by the rotating grinding cone 23 and the grinding chamber 31. The porcelain clay that does not pass through the sieve hole is slowly transported to A by the rotating feeding plate 37 for grinding. By controlling the transmission speed of the feeding plate 37, continuous grinding is maintained while controlling the single grinding amount, thereby improving the porcelain clay grinding efficiency and avoiding agglomeration caused by excessive grinding.

[0044] Furthermore, a plurality of groups of grinding grooves 38 are circumferentially spaced apart on the inner wall of the grinding chamber 31 , a mounting groove 39 is formed at the bottom of the inner cavity of the grinding chamber 31 , and an air inlet 310 is formed at the bottom of the mounting groove 39 .

[0045] It should be supplemented that the width of the grinding groove 38 gradually increases upward along the inner wall of the grinding chamber 31 .

[0046] See also Figures 7 to 9 The screening assembly 4 includes an air supply plate 41 fixedly connected to the interior of the mounting groove 39, a connecting nozzle 44 rotatably connected to the bottom of the grinding chamber 31, and a connecting assembly. The connecting assembly includes an air supply pipe 42 connected to the air inlet nozzle 15 and a transition pipe 43 connecting the air supply pipe 42 and the connecting nozzle 44. One end of the transition pipe 43 is fixedly connected to the connecting nozzle 44, and the other end of the transition pipe 43 passes through the bottom of the screening chamber 11 and is fixedly connected to the screening chamber 11.

[0047] Furthermore, a truncated cone-shaped hole is provided at the top of the connection nozzle 44 , the inner wall of the truncated cone-shaped hole is adapted to the outer wall of the bottom of the grinding chamber 31 , and a sealing gasket is fixedly connected to the inner wall of the truncated cone-shaped hole.

[0048] Furthermore, the air supply plate 41 includes a sealing cone 412 that is slidably connected to the inner wall of the mounting groove 39. The sealing cone 412 is in the shape of an inverted cone. The bottom edge of the sealing cone 412 is fixedly connected to an elastic ring 411. The elastic ring 411 is in the shape of a circular ring. The inner side of the elastic ring 411 is fixedly connected to the outer wall of the sealing cone 412. The outer edge of the elastic ring 411 is fixedly connected to the top of the inner wall of the mounting groove 39. A plurality of groups of air outlet holes 413 are spaced apart on the upper end surface of the elastic ring 411. The positions and numbers of the air outlet holes 413 correspond one-to-one to the grinding grooves 38.

[0049] It is understood that the air pump blows out air and is transported to the connecting nozzle 44 through the air supply pipe 42 and the transition pipe 43. The air flows through the air inlet 310 into the mounting groove 39 and pushes the sealing cone 412 to slide upward along the inner wall of the mounting groove 39. The sliding sealing cone 412 expands the elastic ring 411, and the air flows through the air outlet 413 and is guided to flow into the interior of the screening net 32 ​​through the grinding groove 38. The flowing air blows out the ground particles in area A and drives the particles through the sieve holes of the screening net 32, accelerating the screening of the ground porcelain clay and preventing clogging of the sieve holes. The inner cavity of the mounting groove 39 has the same shape as the sealing cone 412. When the sealing cone 412 moves upward, the resulting cone shape can reduce the number of particles that pass through the air outlet 413 and enter the interior of the connecting nozzle 44.

[0050] It should be added that the elastic ring 411 is made of elastic wear-resistant material, such as wear-resistant rubber, silicone rubber and TPE.

[0051] It should be noted that the annular width of the elastic ring 411 is much smaller than the diameter of the sealing cone 412. When there is no air blowing, the top of the sealing cone 412 is flush with the upper edge of the mounting groove 39, and the elastic ring 411 is stored in the adjacent area of ​​the sealing cone 412 and the mounting groove 39. When there is air blowing, the sealing cone 412 is pushed by the wind to slide a small height along the inner wall of the mounting groove 39, and the sealing cone 412 is unfolded. The air flow passes through the air outlet 413 and enters the screening net 32. Since the displacement height of the sealing cone 412 is very small, the influence on the stress state of the material grinding in the grinding chamber 31 is negligible.

[0052] It should also be noted that the air supply pipe 42 is fixedly connected to the side wall of the transition pipe 43, and the end of the transition pipe 43 facing away from the connecting nozzle 44 extends out of the screening chamber 11 and is closed by a sealing cover. At the moment when the air pump is started or shut down, and when the air flow rate is low during adjustment, trace particles will pass through the air outlet 413 into the interior of the mounting groove 39. The entering particles are collected to the bottom through the transition pipe 43, and the particles are cleaned by opening the sealing cover.

[0053] Furthermore, the bottom of the installation groove 39 may be configured to be a cone with a high edge and a low interior, so that the incoming particles are collected along the bottom of the installation groove 39 through the air inlet 310 into the transition pipe 43 .

[0054] A low-loss porcelain clay grinding and dynamic screening process for insulator production adopts the above-mentioned grinding and dynamic screening equipment. Porcelain clay is put in through the feed port, and the motor drives the grinding cone to rotate. At the same time, the transmission is transmitted to the transmission gear ring through the transmission gear to drive the separation sleeve to rotate. When the lower feed port and the feed hole overlap, the porcelain clay is intermittently put into the top of the feed plate. Part of the porcelain clay passes through the screening mesh and enters the bottom of the screening cavity, and part of the porcelain clay is screened layer by layer by the feed plate and enters the grinding cavity for grinding. The porcelain clay that has passed the screening is slowly transported to the grinding cavity by the rotating feed plate for grinding. At the same time, the air flow is blown into the grinding cavity through the screening component, and is guided by the grinding groove to bring out the fine powder in the grinding cavity and inside the screening mesh. The porcelain clay after grinding and screening is collected in the screening cavity and taken out through the discharge port.

[0055] Principle: The motor 21 drives the grinding cone 23 to rotate, and at the same time transmits it to the transmission gear ring 35 through the transmission gear 12 to drive the separation sleeve 34 to rotate. The porcelain clay passes through the feed hole. When the lower feed port 36 intermittently overlaps with the feed hole, the porcelain clay is intermittently put into the top of the feed plate 37. A part of the porcelain clay under the action of centrifugal force and gravity passes through the screening net 32 ​​and enters the bottom of the inner cavity of the screening chamber 11, and a part is screened layer by layer by the feed plate 37 and enters area A for grinding. The porcelain clay that has passed the screening is slowly transported to area A for grinding by the rotating feed plate 37. At the same time, the air flow is blown into the grinding chamber 31 through the screening component 4, and is guided through the grinding groove 38 to bring the fine powder in area A and inside the screening net 32 ​​out of the screening net 32, thereby promoting the screening of the particles after grinding, reducing the agglomeration of porcelain clay, and avoiding clogging of the screen holes.

[0056] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-loss porcelain clay grinding and dynamic screening equipment for insulator production, characterized in that: include: The device body (1) comprises a screening chamber (11), wherein a transmission mechanism is provided at the top of the inner cavity of the screening chamber (11); A grinding assembly (2) comprising a motor (21), a drive shaft (22), a grinding column (25), and a grinding cone (23) mounted on the top of the screening chamber (11), wherein the upper and lower ends of the grinding column (25) are fixedly connected to the drive shaft (22) and the grinding cone (23), respectively, and the motor (21) drives the grinding column (25) and the grinding cone (23) to rotate via the drive shaft (22); The screening assembly (3) comprises a connecting ring (33) rotatably connected to the top of the inner cavity of the screening cavity (11), a separator sleeve (34) and a screening net (32) are fixedly connected to both sides of the lower end surface of the connecting ring (33), the lower end of the screening net (32) is fixedly connected to the grinding cavity (31), the separator sleeve (34) is connected to the driving shaft (22) through a transmission mechanism, the inner diameter of the separator sleeve (34) is equal to the outer diameter of the grinding column (25), a feeding plate (37) is spirally provided on the inner wall of the screening net (32), the outer edge of the feeding plate (37) is fixedly connected to the inner wall of the screening net (32), the inner edge of the feeding plate (37) is rotatably connected to the outer wall of the grinding column (25), the upper end of the feeding plate (37) is provided with a sieve hole, and the diameter of the sieve hole decreases layer by layer in the vertical direction downward, and the porcelain clay passes through the feed port and is fed to the upper end surface of the feeding plate (37); The screening component (4) is installed at the lower end of the grinding chamber (31), and the external air pump blows air into the inner cavity of the grinding chamber (31) through the screening component (4) to screen the porcelain clay.

2. The low-loss porcelain clay grinding and dynamic screening equipment for insulator production according to claim 1 is characterized in that: The grinding cone (23) has the same shape and size as the inner cavity of the grinding chamber (31), and a plurality of groups of grinding edges (24) are fixedly connected to the outer wall of the grinding cone (23) in the circumferential direction, and a plurality of groups of grinding grooves (38) are spaced apart in the circumferential direction on the inner wall of the grinding chamber (31).

3. The low-loss porcelain clay grinding and dynamic screening equipment for insulator production according to claim 2 is characterized in that: A plurality of groups of feed openings (36) are provided at intervals on the top of the connecting ring (33), and the feed openings (36) intermittently overlap with the feed opening when the feed openings (36) rotate.

4. The low-loss porcelain clay grinding and dynamic screening equipment for insulator production according to claim 3 is characterized in that: The bottom of the inner cavity of the grinding chamber (31) is provided with a mounting groove (39), and the bottom of the mounting groove (39) is provided with an air inlet hole (310). The diameter of the air inlet hole (310) gradually increases in a vertical downward direction, and the lower end of the air inlet hole (310) is rotatably connected to the top of the screening component (4).

5. The low-loss porcelain clay grinding and dynamic screening equipment for insulator production according to claim 4 is characterized in that: The screening assembly (4) comprises: an air supply plate (41) mounted in the mounting groove (39), a connecting nozzle (44) rotatably connected to the bottom of the grinding chamber (31), and a connecting assembly connected to an external air pump; The air supply plate (41) includes a sealing cone (412) and an elastic ring (411) slidably connected to the inner cavity of the mounting groove (39), wherein the sealing cone (412) is in the shape of an inverted cone, and the elastic ring (411) is in the shape of a circular ring. The inner side of the circular ring of the elastic ring (411) is fixedly connected to the lower edge of the outer wall of the sealing cone (412), and the outer edge of the circular ring of the elastic ring (411) is fixedly connected to the top edge of the side wall of the mounting groove (39).

6. The low-loss porcelain clay grinding and dynamic screening equipment for insulator production according to claim 5, characterized in that: The upper end surface of the elastic ring (411) is provided with a plurality of groups of air outlet holes (413) at intervals, and the positions and numbers of the air outlet holes (413) correspond one-to-one to the grinding grooves (38).

7. The low-loss porcelain clay grinding and dynamic screening equipment for insulator production according to claim 5, characterized in that: A truncated cone-shaped hole is provided at the top of the connection nozzle (44), the inner wall shape of the truncated cone-shaped hole is adapted to the outer wall shape of the bottom of the grinding chamber (31), and a sealing gasket is fixedly connected to the inner wall of the truncated cone-shaped hole.

8. A low-loss porcelain clay grinding and dynamic screening process for insulator production, characterized in that: Using the grinding and dynamic screening equipment described in any one of claims 3-7, porcelain clay is put in through the feed port, and the motor drives the grinding cone to rotate, and at the same time, it is transmitted to the transmission gear ring through the transmission gear to drive the separation sleeve to rotate. When the lower feed port overlaps with the feed port, porcelain clay is intermittently put into the top of the feed plate, and part of the porcelain clay passes through the screening net and enters the bottom of the screening cavity, and part of the porcelain clay is screened layer by layer by the feed plate and enters the grinding cavity for grinding. The porcelain clay that has not passed the screening is slowly transported to the grinding cavity by the rotating feed plate for grinding. At the same time, the air flow is blown into the grinding cavity through the screening component, and is guided by the grinding groove to bring out the fine powder in the grinding cavity and inside the screening net. The ground and screened porcelain clay is gathered in the screening cavity and taken out through the discharge port.

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