Natural graphite powder airflow shaping equipmentTechnical Field
The invention relates to the technical field of airflow shaping, in particular to natural graphite powder airflow shaping equipment.
Background
The graphite powder is mineral powder, the main component of the graphite powder is carbon simple substance, soft and black gray, is one of the most temperature-resistant minerals, has relatively stable chemical properties at normal temperature, and is insoluble in water, dilute acid, dilute alkali and organic solvent; the high-temperature-resistant conductive material can be used as a refractory material, a conductive material and a wear-resistant lubricating material, and when graphite powder is produced, the graphite powder is required to be subjected to airflow shaping operation, and is ground and separated.
When the existing natural graphite powder airflow shaping equipment is used, the classification operation is carried out on the graphite powder subjected to airflow grinding through the classification wheel, but after the classification wheel is used for a long time, a large amount of impurities are attached to the outer wall of the classification wheel, so that the classification wheel is blocked, the use requirements of people are not met, and therefore the natural graphite powder airflow shaping equipment is provided.
Disclosure of Invention
The invention aims to provide natural graphite powder airflow shaping equipment, which solves the problem that the classification wheel is blocked due to the fact that a large amount of impurities are attached to the outer wall of the classification wheel after the classification wheel is used for a long time in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a natural graphite powder air current plastic equipment, includes the casing, the inner wall fixedly connected with clearance frame of casing, clearance frame's bottom is provided with the clearance screw rod, clearance screw rod's outer wall threaded connection has flexible slider, flexible slider's top fixedly connected with link, the rotatory guide pillar of the equal fixedly connected with in both ends of link, one side swing joint of rotatory guide pillar and the rotatory rotary drum that clearance frame inner wall connects soon, rotatory guide slot has been seted up to the junction of rotary drum and rotatory guide pillar, the one end fixedly connected with rotating base of rotary drum, rotating base's outer wall edge fixedly connected with rotary brush, clearance frame outer wall fixedly connected with's reposition of redundant personnel frame, the outer wall fixedly connected with of reposition of redundant personnel frame and the reposition of redundant personnel grid of the outer wall laminating of rotary brush.
Based on the structure, the rotary guide pillar slides and drives the rotary drum to rotate through the double-spiral rotary guide groove, the rotary drum rotates and drives the rotary brush to slide along the outer wall of the shunt grid, impurities attached to the outer wall of the shunt grid are scraped, the operation of cleaning the shunt grid is realized, the separation efficiency of graphite fine powder after grinding the shunt grid is improved, a large amount of impurities are prevented from being attached to the outer wall of the shunt grid after the shunt grid is used for a long time, and the shunt grid is blocked.
Preferably, one end fixedly connected with work motor of clearance frame, the output fixedly connected with pivot of work motor, the one end of pivot extends to the inside fixedly connected with water conservancy diversion fan piece of reposition of redundant personnel grid, one side of water conservancy diversion fan piece be provided with shells inner wall fixedly connected with blown down tank piece, the ejection of compact guide hole has been seted up to the inner wall of blown down tank piece, the one end fixedly connected with of blown down tank piece and shells outer wall fixedly connected with's fine powder exit tube, the outer wall of casing is located clearance frame's below fixedly connected with overgrate air inlet tube, the outer wall of casing is located the below fixedly connected with raw materials inlet tube of overgrate air inlet tube, the bottom fixedly connected with middling exit tube of casing, the lateral wall fixedly connected with support frame of casing, the inner wall fixedly connected with circulation frame of support frame.
Preferably, the shape of the rotary guide groove is double-spiral, and the rotary cylinder forms a rotary structure through the rotary guide post, the rotary guide groove and the cleaning frame.
Preferably, the two groups of the flow dividing frames are arranged, the two groups of the flow dividing frames are centrosymmetric with respect to the discharge chute block, the appearance of the discharge guide hole is hyperbolic, and the appearance of the flow guiding fan blade is spiral.
Preferably, the outer wall fixedly connected with circulation motor of circulation frame, the output of circulation motor extends to the inside fixedly connected with rotary disk of circulation frame, the outer wall fixedly connected with water conservancy diversion strip of rotary disk, the outer wall fixedly connected with circulation pipe that is located circulation frame on one side of water conservancy diversion strip, the outer wall edge fixedly connected with rotating barrier of rotary disk, the outer wall of circulation frame just is located one side fixedly connected with circulation exit tube of rotating barrier.
Preferably, the shape of the guide strip is arc-shaped, one end of the circulating inlet pipe coincides with the rotation center of the rotating disc, and the guide strip and the rotating baffle are circumferentially distributed at equal angles relative to the rotation center of the rotating disc.
Preferably, the connection part fixedly connected with of circulation exit tube and raw materials income pipe switches the frame, the circulation advances pipe and goes out powder exit tube fixed connection through switching the frame, the outer wall that switches the frame is provided with the switching screw rod, the outer wall threaded connection who switches the screw rod has the switching slider, the equal fixedly connected with lifting orifice plate in both ends of switching slider, the outer wall swing joint who lifting orifice plate has the switching guide arm that connects soon with switching frame outer wall, the one end fixedly connected with of switching guide arm switches the piece, the switching guide hole has been seted up to the inner wall of switching the piece, the lateral wall fixedly connected with feed inlet of switching the frame, the lateral wall fixedly connected with discharge gate that the feed inlet was kept away from to the switching frame.
Preferably, the switching blocks are provided with two groups, the two groups of switching blocks are respectively positioned at the connection part of the circulating outlet pipe and the raw material inlet pipe and the connection part of the circulating inlet pipe and the coarse powder outlet pipe, and the appearance of the switching guide hole is in a T shape.
Preferably, the bottom fixedly connected with adjusting frame of reposition of redundant personnel frame, adjusting frame's inner wall is provided with adjusting bolt, adjusting bolt's outer wall threaded connection has adjusting slide, adjusting slide's outer wall fixedly connected with spliced pole, the outer wall swing joint of spliced pole has the connection orifice plate, the regulation guide slot has been seted up to the junction of connection orifice plate and spliced pole, the top fixedly connected with of connection orifice plate connects the adjusting ring soon with reposition of redundant personnel frame inner wall, the outer wall fixedly connected with of adjusting ring is with the regulation grid of laminating mutually with reposition of redundant personnel grid inner wall.
Preferably, the adjusting ring forms a rotating structure with the adjusting frame through the connecting column and the adjusting guide groove, and the center of the adjusting grid bar coincides with the center of the dividing grid bar.
Compared with the prior art, the invention has the beneficial effects that:
1. Through setting up the rotatory brush, rotatory guide pillar slip drives rotatory section of thick bamboo through the rotatory guide slot of double helix form and rotates, and rotatory section of thick bamboo rotates and drives rotatory brush and slide along the outer wall of reposition of redundant personnel grid, scrapes the impurity that will adhere to the outer wall of reposition of redundant personnel grid, realizes the clearance operation to reposition of redundant personnel grid, improves the separation efficiency of graphite fine powder after the reposition of redundant personnel grid grinds, avoids reposition of redundant personnel grid long-time use the back, and the outer wall of reposition of redundant personnel grid can adhere to a large amount of impurity, leads to the reposition of redundant personnel grid to take place to block up.
2. Through setting up the switching guide hole, the lifting pore plate slides and drives the switching piece through the switching guide arm and rotate, and the switching piece rotates and drives the switching guide hole and rotate, and the switching guide hole rotates and carries out switching operation to the flow direction of graphite powder to make coarse powder exit tube and circulation advance the pipe to be linked together and raw materials enter the pipe and be linked together with circulation exit tube.
3. Through setting up the regulation grid, the spliced pole slides and drives the connecting orifice through adjusting the guide slot and rotate, and the connecting orifice rotates and drives the regulation grid of adjusting ring outer wall and laminate the slip relatively with the reposition of redundant personnel grid, through adjusting reposition of redundant personnel grid and adjusting grid relative position, realizes the regulation operation to reposition of redundant personnel grid reposition of redundant personnel size, is convenient for select separately the operation to the graphite powder of equidimension not.
4. Through setting up the water conservancy diversion strip, circulation motor work drives water conservancy diversion strip and the rotating barrier rotation of rotary disk outer wall, and the water conservancy diversion strip rotates and drives graphite middlings after the air current plastic and discharges from circulation exit tube through centrifugal force, and graphite middlings after the air current plastic of circulation exit tube reentrant casing through switching the frame, realizes the circulation air current grinding operation to graphite powder.
5. Through setting up two sets of frame that flow in, work motor work drives the water conservancy diversion fan piece through the pivot and rotates to make the inside negative pressure that produces of casing, simultaneously, the staff is toward overgrate air intake pipe injection air, drives through the casing and grinds back graphite fine powder and get into the ejection of compact guide hole of blown down tank piece through the reposition of redundant personnel grid, and will grind back graphite fine powder and follow the fine powder exit tube and discharge, the coarse powder in the graphite powder is discharged from the discharge gate of switching the frame outer wall through the coarse powder exit tube, is convenient for carry out multistage air current grinding operation to the graphite powder.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a housing structure according to the present invention;
FIG. 3 is a schematic view of a spout block connection structure of the present invention;
FIG. 4 is a schematic cross-sectional view of a spout block of the present invention;
FIG. 5 is a schematic cross-sectional view of a cleaning frame of the present invention;
FIG. 6 is a schematic view of a rotary drum according to the present invention;
FIG. 7 is a schematic cross-sectional view of a circulation frame of the present invention;
FIG. 8 is a schematic diagram of a switch frame structure according to the present invention;
FIG. 9 is a schematic cross-sectional view of a switch frame of the present invention;
FIG. 10 is a schematic diagram of a switching via operation structure according to the present invention;
fig. 11 is a schematic view of the structure of the adjusting grid bar of the present invention.
In the figure: 1. a housing; 2. cleaning the frame; 201. cleaning a screw; 202. a telescopic slide block; 203. a connecting frame; 204. rotating the guide post; 205. a rotary drum; 206. a rotary guide groove; 207. a rotating base; 208. a rotary brush; 3. a shunt frame; 301. a shunt grid; 4. a working motor; 401. a rotating shaft; 402. a deflector fan; 5. a discharge chute block; 501. a discharging guide hole; 502. fine powder outlet pipe; 6. a secondary air inlet pipe; 7. raw material is fed into the pipe; 8. a coarse powder outlet pipe; 9. a support frame; 10. a circulation frame; 1001. a circulation motor; 1002. a rotating disc; 1003. a flow guiding strip; 1004. circulating the pipe; 1005. rotating the baffle; 1006. a circulation outlet pipe; 11. a switching frame; 1101. switching the screw; 1102. a switching slider; 1103. lifting pore plates; 1104. switching the guide rod; 1105. a switching block; 1106. switching the guide hole; 1107. a feed inlet; 1108. a discharge port; 12. an adjusting frame; 1201. an adjusting bolt; 1202. an adjusting slide block; 1203. a connecting column; 1204. a connecting pore plate; 1205. adjusting the guide groove; 1206. an adjusting ring; 1207. and adjusting the grid bars.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 6, in an embodiment of the present invention, a natural graphite powder airflow shaping device includes a housing 1, a cleaning frame 2 is fixedly connected to an inner wall of the housing 1, a cleaning screw 201 (as shown in fig. 5) is disposed at a bottom end of the cleaning frame 2, a telescopic slider 202 is screwed to an outer wall of the cleaning screw 201, a connecting frame 203 is fixedly connected to a top end of the telescopic slider 202, rotating guide posts 204 are fixedly connected to two ends of the connecting frame 203, a rotating cylinder 205 screwed to an inner wall of the cleaning frame 2 is movably connected to one side of the rotating guide posts 204, a rotating guide slot 206 is formed at a connection portion between the rotating cylinder 205 and the rotating guide posts 204, a rotating base 207 is fixedly connected to one end of the rotating cylinder 205, a rotating brush 208 is fixedly connected to an outer wall edge of the rotating base 207, a shunt frame 3 is fixedly connected to an outer wall of the cleaning frame 2, and a shunt grid 301 attached to an outer wall of the rotating brush 208 is fixedly connected to an outer wall of the shunt frame 3.
Based on the above structure, the rotary guide pillar 204 slides and drives the rotary drum 205 to rotate through the rotary guide groove 206, the rotary drum 205 rotates and drives the rotary brush 208 to slide along the outer wall of the shunt grid 301 through the rotary base 207, a large amount of impurities attached to the outer wall of the shunt grid 301 are scraped, the cleaning operation of the shunt grid 301 is realized, the separation efficiency of graphite fine powder after grinding the shunt grid 301 is improved, and the phenomenon that a large amount of impurities are attached to the outer wall of the shunt grid 301 after the shunt grid 301 is used for a long time is avoided, so that the shunt grid 301 is blocked.
Further, referring to fig. 1 to 4, one end of the cleaning frame 2 is fixedly connected with the working motor 4, the output end of the working motor 4 is fixedly connected with the rotating shaft 401, one end of the rotating shaft 401 extends to the inside of the diversion grid 301 and is fixedly connected with the diversion fan 402, one side of the diversion fan 402 is provided with a discharge chute block 5 fixedly connected with the inner wall of the shell 1, a discharge guide hole 501 is formed in the inner wall of the discharge chute block 5, one end of the discharge chute block 5 is fixedly connected with a fine powder outlet pipe 502 fixedly connected with the outer wall of the shell 1, a secondary air inlet pipe 6 is fixedly connected with the outer wall of the shell 1 below the cleaning frame 2, a raw material inlet pipe 7 is fixedly connected with the outer wall of the shell 1 below the secondary air inlet pipe 6, a coarse powder outlet pipe 8 is fixedly connected with a support frame 9, the inner wall of the support frame 9 is fixedly connected with the circulation frame 10, during working, staff injects air into the secondary air inlet pipe 6, and drives ground graphite fine powder to enter the discharge 501 of the discharge chute block 5 through the diversion grid 301, and discharges the ground graphite fine powder from the discharge hole 502 through the discharge hole 502, thereby realizing the grinding operation of the fine powder.
Further, referring to fig. 5 and 6, the shape of the rotary guide slot 206 is double-spiral, the rotary drum 205 forms a rotary structure with the cleaning frame 2 through the rotary guide column 204 and the rotary guide slot 206, and when in operation, through setting the double-spiral rotary guide slot 206, the rotary guide column 204 slides to drive the rotary drum 205 to rotate through the double-spiral rotary guide slot 206, and the rotary drum 205 rotates to drive the rotary brush 208 to slide along the outer wall of the shunt grid 301 through the rotary base 207, so as to scrape a large amount of impurities attached to the outer wall of the shunt grid 301.
Further, referring to fig. 3 and 4, the split-flow frame 3 is provided with two groups, the two groups of split-flow frames 3 are centrally symmetrical with respect to the discharge chute block 5, the appearance of the discharge guide hole 501 is hyperbolic, the appearance of the guide fan 402 is spiral, during operation, the split-flow frame 3 is convenient for sort graphite powder with different sizes by arranging the two groups of split-flow frames 3, the guide fan 402 is driven to rotate by the working motor 4 through the rotating shaft 401 by arranging the spiral guide fan 402, so that negative pressure is generated inside the shell 1, fine powder in the graphite powder is subjected to air flow grinding operation by the split-flow grid 301.
Further, referring to fig. 7, the outer wall of the circulation frame 10 is fixedly connected with a circulation motor 1001, the output end of the circulation motor 1001 extends to the inside of the circulation frame 10 and is fixedly connected with a rotary disk 1002, the outer wall of the rotary disk 1002 is fixedly connected with a flow guide bar 1003, one side of the flow guide bar 1003 is positioned on the outer wall of the circulation frame 10 and is fixedly connected with a circulation inlet pipe 1004, the edge of the outer wall of the rotary disk 1002 is fixedly connected with a rotary baffle 1005, the outer wall of the circulation frame 10 and one side of the rotary baffle 1005 is fixedly connected with a circulation outlet pipe 1006, during operation, the circulation motor 1001 works to drive the flow guide bar 1003 and the rotary baffle 1005 on the outer wall of the rotary disk 1002 to rotate, the flow guide bar 1003 rotates to drive graphite coarse powder after airflow shaping to be discharged from the circulation outlet pipe 1006 through centrifugal force, and the graphite coarse powder after airflow shaping of the circulation outlet pipe 1006 enters the shell 1 again through the switching frame 11, so that the circulation airflow grinding operation of graphite powder is realized.
Further, referring to fig. 7, the shape of the flow guide bar 1003 is arc, one end of the circulation inlet pipe 1004 coincides with the rotation center of the rotary disk 1002, the flow guide bar 1003 and the rotary baffle 1005 are all circumferentially distributed at equal angles with respect to the rotation center of the rotary disk 1002, and when in operation, the circulation motor 1001 works to drive the flow guide bar 1003 and the rotary baffle 1005 on the outer wall of the rotary disk 1002 to rotate, and the flow guide bar 1003 rotates to drive the graphite coarse powder after airflow shaping to be discharged from the circulation outlet pipe 1006 through centrifugal force.
Further, referring to fig. 8 to 10, a connection portion of the circulation outlet pipe 1006 and the raw material inlet pipe 7 is fixedly connected with a switching frame 11, the circulation inlet pipe 1004 is fixedly connected with the coarse powder outlet pipe 8 through the switching frame 11, a switching screw 1101 is arranged on the outer wall of the switching frame 11, a switching slider 1102 is connected to the outer wall of the switching screw 1101 in a threaded manner, lifting hole plates 1103 are fixedly connected to two ends of the switching slider 1102, a switching guide rod 1104 is movably connected to the outer wall of the switching frame 11 in a screwed manner, one end of the switching guide rod 1104 is fixedly connected with a switching block 1105, a switching guide hole 1106 is formed in the inner wall of the switching block 1105, a feed inlet 1107 is fixedly connected to the side wall of the switching frame 11, a discharge hole 1108 is fixedly connected to the side wall of the switching frame 11 away from the feed inlet 1107, and when the switching guide hole plates 1105 slide through the switching guide rod 1104 to drive the switching block 1105 to rotate, and the switching guide hole 1106 to rotate, so that the coarse powder outlet pipe 8 is communicated with the circulation inlet pipe 1004 and the raw material inlet pipe 7 is communicated with the circulation outlet pipe 1006.
Further, referring to fig. 8 to 10, two sets of switching blocks 1105 are provided, the two sets of switching blocks 1105 are respectively located at the connection part of the circulation outlet pipe 1006 and the raw material inlet pipe 7 and the connection part of the circulation inlet pipe 1004 and the coarse powder outlet pipe 8, the shape of the switching guide hole 1106 is in a T shape, and when in operation, the lifting hole plate 1103 slides through the switching guide rod 1104 to drive the switching block 1105 to rotate, the switching block 1105 rotates to drive the switching guide hole 1106 to rotate, and the switching guide hole 1106 rotates to switch the flowing direction of the graphite powder.
Further, referring to fig. 5 and 11, the bottom end of the shunt frame 3 is fixedly connected with an adjusting frame 12, an adjusting bolt 1201 is arranged on the inner wall of the adjusting frame 12, an adjusting slide block 1202 is connected to the outer wall of the adjusting bolt 1201 in a threaded manner, a connecting column 1203 is fixedly connected to the outer wall of the adjusting slide block 1202, a connecting hole plate 1204 is movably connected to the outer wall of the connecting column 1203, an adjusting guide groove 1205 is formed in the connecting position of the connecting hole plate 1204 and the connecting column 1203, an adjusting grid 1207 which is screwed with the inner wall of the shunt frame 3 is fixedly connected to the outer wall of the adjusting ring 1206, the connecting column 1203 is fixedly connected with an adjusting grid 1207 which is jointed with the inner wall of the shunt grid 301, during operation, the connecting hole plate 1204 is driven to rotate by the adjusting guide groove 1205, the adjusting grid 1207 on the outer wall of the adjusting ring 1206 is driven to be jointed with the shunt grid 301 in a sliding manner, and the adjusting operation of the shunt size of the shunt grid 301 is realized by adjusting the relative position of the adjusting grid 1207, and the graphite powder with different sizes is convenient to sort.
Further, referring to fig. 11, the adjusting ring 1206 forms a rotating structure between the adjusting guide slot 1205 and the adjusting frame 12 through the connecting post 1203, the center of the adjusting grid 1207 coincides with the center of the split grid 301, and when in operation, the connecting post 1203 slides through the adjusting guide slot 1205 to drive the connecting orifice 1204 to rotate, and the connecting orifice 1204 rotates to drive the adjusting grid 1207 on the outer wall of the adjusting ring 1206 to relatively attach to the split grid 301 to slide, so as to realize the rotation operation of the adjusting grid 1207.
The working principle of the invention is as follows: when the graphite powder airflow shaping equipment is used, firstly, the shunting size of the shunting grid 301 is adjusted, in the adjusting frame 12, an operator rotates the adjusting bolt 1201, the adjusting bolt 1201 rotates to drive the connecting column 1203 to slide through the adjusting sliding block 1202, the connecting column 1203 slides to drive the connecting hole plate 1204 to rotate through the adjusting guide groove 1205, the connecting hole plate 1204 rotates to drive the adjusting grid 1207 on the outer wall of the adjusting ring 1206 to be relatively attached to and slide with the shunting grid 301, and the adjusting operation on the shunting size of the shunting grid 301 is realized through adjusting the relative positions of the shunting grid 301 and the adjusting grid 1207, so that the graphite powder with different sizes is conveniently sorted.
Next, the staff injects graphite powder into the feed inlet 1107, the feed inlet 1107 is through switching frame 11 from raw materials admission tube 7 injection casing 1 in, then work motor 4 work drives the rotation of water conservancy diversion fan 402 through pivot 401, so that the inside negative pressure that produces of casing 1, simultaneously, the staff is toward overgrate air admission tube 6 injection air, the inside air current of casing 1 drives graphite powder and moves each other, grind the graphite powder, drive the graphite powder after grinding through casing 1 and get into the ejection of compact guide hole 501 of blown down tank piece 5 through reposition of redundant personnel grid 301, and discharge the graphite powder after grinding from fine powder exit tube 502, the middling in the graphite powder is discharged from the discharge gate 1108 of switching frame 11 outer wall through middling exit tube 8.
Normal graphite coarse powder is directly discharged through a discharge hole 1108, but graphite fine powder possibly adheres to the outer wall of the graphite coarse powder, so that the graphite coarse powder needs to be subjected to circulating air flow grinding operation; when the graphite coarse powder circulation airflow is ground, the graphite coarse powder enters the circulation frame 10 through the switching frame 11, is injected into the shell 1 again, a worker rotates the switching screw 1101, the switching screw 1101 drives the two groups of lifting pore plates 1103 to synchronously slide through the switching sliding blocks 1102, the lifting pore plates 1103 slide to drive the switching block 1105 to rotate through the switching guide rods 1104, and the switching block 1105 rotates to drive the switching guide holes 1106 to rotate, so that the coarse powder outlet pipe 8 and the circulation inlet pipe 1004 are communicated, and the raw material inlet pipe 7 and the circulation outlet pipe 1006 are communicated.
Then, the graphite coarse powder after the airflow shaping enters the circulation frame 10 through the switching frame 11, then the circulation motor 1001 works to drive the flow guide strips 1003 and the rotary baffle 1005 on the outer wall of the rotary disk 1002 to rotate, the flow guide strips 1003 rotate to drive the graphite coarse powder after the airflow shaping to be discharged from the circulation outlet pipe 1006 through centrifugal force, and the graphite coarse powder after the airflow shaping of the circulation outlet pipe 1006 reenters the shell 1 through the switching frame 11, so that the circulation airflow grinding operation of the graphite powder is realized.
Finally, after the shunt grid 301 is used for a long time, a large amount of impurities are adhered to the outer wall of the shunt grid 301, so that the shunt grid 301 is blocked, cleaning operation is needed to be performed on the shunt grid 301, a worker rotates the cleaning screw 201, the cleaning screw 201 rotates to drive the rotary guide posts 204 at two ends of the connecting frame 203 to slide through the telescopic sliding blocks 202, the rotary guide posts 204 slide to drive the rotary drum 205 to rotate through the double-spiral rotary guide grooves 206, the rotary drum 205 rotates to drive the rotary brush 208 to slide along the outer wall of the shunt grid 301 through the rotary base 207, a large amount of impurities adhered to the outer wall of the shunt grid 301 are scraped, cleaning operation on the shunt grid 301 is achieved, and the sorting efficiency of graphite fine powder after the shunt grid 301 is ground is improved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.