CN115138436A

CN115138436A - Material crushing grinder

Info

Publication number: CN115138436A
Application number: CN202211085153.1A
Authority: CN
Inventors: 牟世勤; 黄志刚
Original assignee: Yantai Aotong Chemical Co ltd
Current assignee: Yantai Aotong Chemical Co ltd
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2022-10-04
Anticipated expiration: 2042-09-06
Also published as: CN115138436B

Abstract

The invention discloses a material crushing and grinding device, which relates to the field of material grinding and comprises a grinding barrel, wherein the grinding barrel comprises an outer barrel and an inner barrel, a material storage cavity is arranged between the outer barrel and the inner barrel, a feed inlet is formed in the upper end part of the outer barrel, a discharge hopper is fixedly arranged at the lower end part of the outer barrel, a positioning box communicated with the inner barrel is fixedly connected above the inner barrel, a plurality of support rods fixedly connected with the outer barrel are fixedly connected with the positioning box, a grinding assembly used for crushing and grinding materials is arranged in the positioning box, a bottom plate is fixedly arranged in the inner barrel, a vertical rod is rotatably connected with the bottom plate, a centrifugal disc is fixedly connected at the upper end part of the vertical rod, a bulk material gap is formed between the centrifugal disc and the inner barrel, a plurality of through holes are formed in the inner barrel and the bottom plate, an air pump is fixedly connected with the inner wall of the outer barrel, the air pump is provided with a pumping pipe and a discharging pipe, the pumping pipe penetrates through the bottom plate to be communicated with the inner barrel, and one end, which is far away from the air pump, corresponds to the grinding assembly. This application has the material and is ground comparatively abundant effect.

Description

Material crushing grinder

Technical Field

The invention relates to the field of material grinding, in particular to a material grinding device.

Background

In the chemical production process, sodium hydroxide is a common strong base. Sodium hydroxide is generally white crystalline, readily soluble in water, highly corrosive, and useful as an acid neutralizer, developer, saponifier, and the like. When sodium hydroxide is used in industry, in order to ensure that sodium hydroxide reacts with other chemical raw materials sufficiently, solid flaky sodium hydroxide is generally added into a closed grinder to be ground and ground, and the ground sodium hydroxide is sent to a synthesis section through equipment and a pipeline.

Chinese patent that the prior art can refer to and bulletin number is CN204746403U discloses a portable high-efficient machine that grinds, including the precomminution chamber, grind quick-witted main part and grinding layer, the precomminution chamber is connected to pan feeding funnel downside, and precomminution intracavity portion left side is equipped with the driving gear, and the driving gear right side is equipped with driven gear, and precomminution chamber downside is connected with the quick-witted main part of grinding, is equipped with the grinding layer on the quick-witted main part inner wall of grinding, and grinding layer unevenness sets up on grinding quick-witted main part inner wall, evenly is equipped with four grinding rollers about grinding machine main part is inside, the utility model discloses portable high-efficient machine, engaged gear train carries out precomminution to the material earlier in the precomminution chamber, has improved the efficiency of follow-up grinding processing, and the material gets into the grinding roller and the abundant grinding of grinding layer on the inner wall after grinding machine.

According to the related technology, when the grinder grinds the materials, the materials fall from the gap under the action of gravity, and are crushed and ground by the pre-crushing and grinding rollers, so that the problem that part of the materials are crushed and ground to be weak is easily caused, and the materials are not crushed and ground sufficiently.

Disclosure of Invention

In order to make the material ground more fully, this application provides a comminuted grinder.

The application provides a material crushing grinder adopts following technical scheme:

the utility model provides a grinder is smashed to material, including the grinding barrel, the grinding barrel includes outer bucket and interior bucket, be equipped with the storage cavity between outer bucket and the interior bucket, the feed inlet has been seted up to outer bucket upper end, the tip has set firmly row hopper under the outer bucket, interior bucket top fixedly connected with and interior bucket be linked together the location case, location case fixedly connected with a plurality of and outer bucket fixed connection's bracing piece, the incasement that is equipped with the grinding component who is used for smashing the grinding material that fixes a position, interior bucket has set firmly the bottom plate, the bottom plate rotates and is connected with the montant, montant upper end fixedly connected with centrifugal disk, be equipped with the bulk cargo clearance between centrifugal disk and the interior bucket, a plurality of through-holes have all been seted up to interior bucket and bottom plate, outer bucket inner wall fixedly connected with the aspiration pump, the aspiration pipe is equipped with pumping pipe and discharging pipe, the pumping pipe is worn to establish the bottom plate and is linked together with interior bucket, the one end that the discharging pipe deviates from the aspiration pump is corresponding with grinding component.

Through adopting above-mentioned technical scheme, in adding the grinding barrel with the material from feed inlet department, the material falls to the centrifugal disk after grinding subassembly is smashed, and the centrifugal disk rotates under the effect of centrifugal force, and the material after the grinding contacts with interior bucket inner wall, and the through-hole screens the material, and the less qualified material of particle diameter passes the through-hole and gets into the storage intracavity, and the great material of particle diameter that can't pass the through-hole scatters on the bottom plate. The air pump is periodically opened, the air pump lifts the materials with large particle sizes on the bottom plate to the feed inlet, the materials are ground and ground through the grinding assembly, the particle sizes of the materials are reduced, and the materials are ground and ground in a circulating mode for many times, so that the materials are ground more fully.

Optionally, grinding unit includes first motor, first commentaries on classics roller and second commentaries on classics roller, and first motor is located the positioning box outer wall, and first commentaries on classics roller and second are changeed the roller and are all rotated and connect in the positioning box, first motor output shaft and first commentaries on classics roller fixed connection, first motor output shaft fixedly connected with first gear, and second commentaries on classics roller fixedly connected with and first gear engaged with second gear mutually, first commentaries on classics roller and second are changeed and are equipped with the corresponding clearance of walking of discharging pipe between the roller.

Through adopting above-mentioned technical scheme, when the material ground, first motor drove first commentaries on classics roller and first gear revolve, and then made the second gear drive the second and changeed the roller and rotate, and the second changes the roller and rotates with first commentaries on classics roller in opposite directions, smashes the grinding to falling into the material of walking in the material clearance, and the crushing grinding operation of material is comparatively simple convenient.

Optionally, the first roller and the second roller are both fixedly connected with a plurality of protrusions.

Through adopting above-mentioned technical scheme, the arch is convenient for increase the extrusion force to the material, is favorable to improving the crushing grinding effect to the material.

Optionally, the first motor is connected with a linkage assembly for driving the centrifugal disc to rotate, the linkage assembly comprises a vertical rod, a first bevel gear, a second bevel gear, a support plate, a third gear, a transmission gear and a fourth gear, the outer barrel is fixedly connected with a positioning plate, the vertical rod is rotatably connected with the positioning plate, the first rotating roller is fixedly connected with a rotating rod penetrating through the positioning box, the first bevel gear is fixedly connected with the rotating rod, the second bevel gear is fixedly arranged on the vertical rod and meshed with the first bevel gear, the support plate penetrates through the inner barrel and is fixedly connected with the inner barrel, the transmission gear is rotatably connected to the support plate, the third gear is fixedly connected to the lower end of the vertical rod, the fourth gear is fixedly connected with the vertical rod, and the transmission gear is respectively meshed with the third gear and the fourth gear.

Through adopting above-mentioned technical scheme, first motor drives bull stick and first bevel gear and rotates for second bevel gear drives the pole setting and rotates, and the pole setting drives the third gear and rotates, and under drive gear's meshing transmission effect, the fourth gear drives the montant and rotates, realizes the rotation of centrifugal disc, and it is comparatively simple and convenient to operate.

Optionally, the vertical rod is fixedly connected with an elastic rope, and one end of the elastic rope, which is far away from the vertical rod, is fixedly connected with a knocking block matched with the inner barrel.

Through adopting above-mentioned technical scheme, the pole setting is rotated and is driven the elasticity rope and rotate, and then strikes the intermittent type nature of piece and strike interior bucket outer wall, is convenient for shake the material that blocks in the through-hole and fall.

Optionally, the supporting plate is fixedly connected with a protective cover, and the third gear, the transmission gear and the fourth gear are all located in the protective cover.

Through adopting above-mentioned technical scheme, the protection casing is convenient for protect the meshing transmission of third gear, drive gear and fourth gear, ensures normal meshing transmission effect.

Optionally, a plurality of stirring blades are fixedly connected to the lower end of the vertical rod along the circumferential direction.

Through adopting above-mentioned technical scheme, stirring vane stirs the stirring to the material on the bottom plate, is convenient for sieve out qualified finished product material.

Optionally, the vertical rod penetrates through the bottom plate and is fixedly connected with the spiral conveying blade.

Through adopting above-mentioned technical scheme, the helical conveying blade rotates and stirs, prevents to take place to block at row material in-process material.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the material falls to the centrifugal tray after grinding assembly crushing grinding, and under the effect of centrifugal force, the material after the grinding contacts with interior bucket inner wall, and the less qualified material of particle size gets into the storage intracavity, and the great material of particle size scatters on the bottom plate. The air pump crushes and grinds the materials with large particle size through the grinding assembly again, so that the materials are ground more fully;

2. under the meshing transmission effect of the transmission gear, the fourth gear drives the vertical rod to rotate, the rotation of the centrifugal disc is achieved, and the operation is convenient and fast.

Drawings

Fig. 1 is a schematic overall structure diagram of a material crushing and grinding device according to an embodiment of the present application.

Fig. 2 is a schematic view for highlighting the connection structure between the air pump and the tub.

Fig. 3 is intended to highlight the structural schematic of the linkage assembly.

Figure 4 is a schematic view of the structure of the polishing assembly.

Description of reference numerals: 1. a grinding barrel; 2. an outer tub; 3. an inner barrel; 11. a material storage cavity; 21. a feed inlet; 4. a discharge hopper; 5. a positioning box; 51. a support bar; 31. a base plate; 32. a vertical rod; 33. a centrifugal pan; 34. bulk gaps; 35. a through hole; 7. an air pump; 71. a material pumping pipe; 72. a discharge pipe; 61. a first motor; 62. a first rotating roller; 63. a second rotating roller; 611. a first gear; 631. a second gear; 64. a feeding gap; 621. a protrusion; 81. erecting a rod; 82. a first bevel gear; 83. a second bevel gear; 84. a support plate; 85. a third gear; 86. a transmission gear; 87. a fourth gear; 22. positioning plates; 622. a rotating rod; 811. an elastic cord; 812. knocking the block; 841. a protective cover; 321. a stirring blade; 322. a screw conveying blade; 41. a discharge pipe; 42. and (4) a valve.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses comminuted grinder.

Referring to fig. 1 and 2, the material crushing and grinding device comprises a grinding barrel 1, wherein the grinding barrel 1 comprises an outer barrel 2 and an inner barrel 3, and the cross section of the inner barrel 3 is concentric with that of the outer barrel 2. Be equipped with storage cavity 11 between outer bucket 2 and the interior bucket 3, feed inlet 21 has been seted up to outer bucket 2 upper end, when smashing the grinding to the material, operating personnel adds the material in grinding vessel 1 from feed inlet 21. The lower tip of outer bucket 2 sets firmly row hopper 4, and row hopper 4 outer wall fixedly connected with three landing leg adopts pig iron material, has good rigidity and bearing capacity, provides the support for whole grinding barrel 1.

Referring to fig. 2 and 3, a positioning box 5 communicated with the inner barrel 3 is fixedly connected above the inner barrel 3, and a plurality of support rods 51 fixedly connected with the inner wall of the outer barrel 2 are fixedly connected with the positioning box 5. The positioning box 5 is internally provided with a grinding assembly for grinding the ground materials, the grinding assembly comprises a first motor 61, a first rotating roller 62 and a second rotating roller 63, and the first rotating roller 62 and the second rotating roller 63 are arranged in parallel. First motor 61 is located the 5 outer walls of positioning box, and first roller 62 and the second of changeing is changeed roller 63 and is all rotated and connect in positioning box 5, and positioning box 5 and first roller 62 fixed connection are worn to establish by first motor 61 output shaft, and when grinding assembly ground the material, operating personnel started first motor 61, and first motor 61 output shaft rotates and drives first roller 62 and rotate.

Referring to fig. 2 and 4, an output shaft of the first motor 61 is fixedly connected with a first gear 611, the first motor 61 drives the first rotating roller 62 and the first gear 611 to rotate, the second rotating roller 63 is close to one end of the first motor 61 and is fixedly connected with a cross bar, the cross bar penetrates through the positioning box 5 and is rotatably connected with the positioning box 5, the cross bar is fixedly connected with a second gear 631, the second gear 631 is engaged with the first gear 611, and then the second gear 631 drives the second rotating roller 63 to rotate. A feeding gap 64 corresponding to the discharge pipe 72 is arranged between the first rotating roller 62 and the second rotating roller 63, and the feed opening 21 is positioned right above the feeding gap 64. The first rotating roller 62 and the second rotating roller 63 are each fixedly connected with a plurality of projections 621. The second roller 63 and the first roller 62 rotate in opposite directions, and then grind the material falling into the feeding gap 64.

Referring to fig. 2 and 3, the inner barrel 3 is fixedly provided with a bottom plate 31, the bottom plate 31 is rotatably connected with a vertical rod 32, the upper end of the vertical rod 32 is fixedly connected with a centrifugal disc 33, and the vertical rod 32 rotates to drive the centrifugal disc 33 to rotate. The first motor 61 is connected to a linkage assembly for driving the centrifugal disc 33 to rotate, and the linkage assembly comprises a vertical rod 81, a first bevel gear 82, a second bevel gear 83, a support plate 84, a third gear 85, a transmission gear 86 and a fourth gear 87. The first rotating roller 62 is fixedly connected with a rotating rod 622 (refer to fig. 4) penetrating through the positioning box 5, the first bevel gear 82 is fixedly connected with the rotating rod 622 (refer to fig. 4), and the first motor 61 drives the rotating rod 622 (refer to fig. 4) and the first bevel gear 82 to rotate.

Referring to fig. 2 and 3, the inner wall of the outer tub 2 is fixedly connected with a positioning plate 22, the lower end of the upright 81 is rotatably connected with the positioning plate 22, the second bevel gear 83 is fixedly disposed on the upright 81 and engaged with the first bevel gear 82, the first bevel gear 82 enables the second bevel gear 83 to drive the upright 81 to rotate, the third gear 85 is fixedly connected to the lower end of the upright 81, and the upright 81 drives the third gear 85 to rotate.

Referring to fig. 3 and 4, the support plate 84 penetrates through the inner barrel 3 and is fixedly connected with the inner barrel 3, the transmission gear 86 is rotatably connected to the support plate 84, and the support plate 84 supports the transmission gear 86. The fourth gear 87 is fixedly connected with the vertical rod 32, the transmission gear 86 is positioned between the third gear 85 and the fourth gear 87, two sides of the transmission gear 86 are respectively meshed with the third gear 85 and the fourth gear 87, and the vertical rod 81 and the vertical rod 32 penetrate through the support plate 84 and are rotatably connected with the support plate 84. The vertical rod 81 drives the third gear 85 to rotate, and under the meshing transmission action of the transmission gear 86, the fourth gear 87 drives the vertical rod 32 to rotate, so that the centrifugal disc 33 rotates.

Referring to fig. 3 and 4, the supporting plate 84 is fixedly connected with a protective cover 841, the third gear 85, the transmission gear 86 and the fourth gear 87 are all positioned in the protective cover 841, and the vertical rod 32 and the vertical rod 81 are all penetrated through the protective cover 841 and are rotationally connected with the protective cover 841. The protective cover 841 protects the meshing transmission of the third gear 85, the transmission gear 86 and the fourth gear 87, and ensures the normal meshing transmission function.

Referring to fig. 2, a bulk material gap 34 is provided between the centrifugal disc 33 and the inner wall of the inner barrel 3, the material is crushed and ground by the first rotating roller 62 and the second rotating roller 63, and then falls onto the centrifugal disc 33, and the ground material contacts the inner wall of the inner barrel 3 under the action of centrifugal force during the rotation of the centrifugal disc 33.

Referring to fig. 2 and 3, the inner barrel 3 and the bottom plate 31 are both provided with a plurality of through holes 35, the through holes 35 on the inner barrel 3 are circumferentially arranged along the barrel wall of the inner barrel 3, when the ground material is collided with the inner wall of the inner barrel 3, the ground material is screened by the through holes 35, the qualified material with small particle size passes through the through holes 35 on the inner barrel 3 and the bottom plate 31 to enter the material storage cavity 11, and the material with large particle size, which cannot pass through the through holes 35, is scattered on the bottom plate 31.

Referring to fig. 1 and 2, an air pump 7 is fixedly connected to the inner wall of the outer tub 2, the air pump 7 is connected to an air pumping pipe 71 and a discharge pipe 72, and the air pump 7 can continuously form negative pressure at the air pumping pipe 71; a positive pressure is established at the tapping pipe 72. One end of the pumping pipe 71 departing from the air pump 7 is penetrated through the bottom plate 31 to be communicated with the inner barrel 3, and one end of the discharging pipe 72 departing from the air pump 7 is penetrated through the upper end part of the outer barrel 2 to be corresponding to the material feeding gap 64. An operator periodically opens the air pump 7, and then the air pump 7 pumps the material with large particle size on the bottom plate 31 through the pumping pipe 71, and then the material with large particle size is lifted to the position of the outer barrel 2 close to the feed port 21 through the discharging pipe 72.

Referring to fig. 1 and 2, the material with large particle size falls from the discharge pipe 72, and is ground and ground by the grinding assembly, so that the particle size of the material is reduced, the material is centrifuged by the centrifugal disc 33 again, the qualified material with smaller particle size passes through the through hole 35 and enters the material storage cavity 11, the material is ground and ground in multiple cycles, the material is sufficiently ground, the qualified finished material is obtained in the material storage cavity 11, and the qualification rate of the finished material is improved.

Referring to fig. 2 and 3, there may be a portion of the material falling onto the floor 31 that is an acceptable finished material of small particle size. The lower end of the vertical rod 32 is fixedly connected with three stirring blades 321 along the circumferential direction, the vertical rod 32 rotates to drive the stirring blades 321 to rotate, so that the stirring blades 321 stir the materials on the bottom plate 31, the qualified finished materials pass through the through holes 35 and fall into the material storage cavity 11, and the doped qualified finished materials are conveniently screened out.

Referring to fig. 3 and 4, the ground material is thrown from the centrifugal disc 33 to the through hole 35 of the inner barrel 3, and there is a problem that some material is stuck in the through hole 35. Pole setting 81 fixed connection has elastic cord 811, and pole setting 81 rotates and drives elastic cord 811 and rotate, and elastic cord 811 deviates from the one end fixedly connected with of pole setting 81 and strikes piece 812, strikes piece 812 and is the spheroid of rigidity, strikes the diameter of piece 812 and is less than pole setting 81 to the distance between the interior barrel 3 outer wall. Elastic rope 811 drives and strikes piece 812 intermittent type nature and strikes 3 outer walls of interior bucket, will block the material shake of in through-hole 35 and fall, reduces the probability that the material in the through-hole 35 blockked subsequent material, and the guarantee grinds the effect to the circulation of material.

Referring to fig. 1 and 3, the vertical rod 32 penetrates through the bottom plate 31 and is fixedly connected with the spiral conveying blade 322, when finished materials are discharged from the discharge hopper 4, the vertical rod 32 drives the spiral conveying blade 322 to rotate, the spiral conveying blade 322 stirs the materials in the discharge hopper 4, and the materials are prevented from being blocked in the discharging process. The lower end of the discharge hopper 4 is provided with a discharge pipe 41, the discharge pipe 41 is connected with a valve 42, and finally, an operator opens the valve 42 to discharge the finished product material in the storage cavity 11 out of the grinding barrel 1 through the discharge pipe 41.

The implementation principle of the material crushing and grinding device in the embodiment of the application is as follows: an operator adds materials into the grinding barrel 1 from the feed port 21, the materials fall onto the centrifugal disc 33 after being ground and ground by the grinding assembly, the centrifugal disc 33 rotates, the ground materials are in contact with the inner wall of the inner barrel 3 under the action of centrifugal force, the ground materials are screened by the through holes 35, the ground qualified materials pass through the inner barrel 3 and the through holes 35 in the bottom plate 31 and enter the material storage cavity 11, and the materials with larger particle sizes which cannot pass through the through holes 35 are scattered on the bottom plate 31. An operator opens the air pump 7 regularly, the air pump 7 lifts the material with large particle size on the bottom plate 31 to a position close to the feed inlet 21 of the outer barrel 2, the material is ground and ground through the grinding assembly, the particle size of the material is reduced, the material is centrifuged through the centrifugal disc 33 again, the qualified material with small particle size passes through the through hole 35 and enters the material storage cavity 11, multiple times of circulation is achieved for grinding and grinding the material, the material is ground sufficiently, and the qualified finished material is obtained in the material storage cavity 11.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a material crushing grinder, includes grinding barrel (1), its characterized in that: grinding barrel (1) includes outer bucket (2) and interior bucket (3), be equipped with storage cavity (11) between outer bucket (2) and interior bucket (3), feed inlet (21) have been seted up to outer bucket (2) upper end, the tip has set firmly row hopper (4) under outer bucket (2), interior bucket (3) top fixedly connected with location case (5) that are linked together with interior bucket (3), location case (5) a plurality of bracing pieces (51) with outer bucket (2) fixed connection, be equipped with the grinding component who is used for smashing the grinding material in location case (5), interior bucket (3) have set firmly bottom plate (31), bottom plate (31) rotate and are connected with montant (32), montant (32) upper end fixedly connected with centrifugal disc (33), be equipped with bulk cargo clearance (34) between centrifugal disc (33) and interior bucket (3), interior bucket (3) and bottom plate (31) have all seted up a plurality of through-hole (35), outer bucket (2) inner wall fixedly connected with aspiration pump (7), aspiration pump (7) are equipped with tube (71) and discharging pipe (72), aspiration tube (71) wear to establish bottom plate (31) and are linked together, the one end that discharging pipe (3) deviates from corresponding grinding component.

2. The material crushing and grinding device according to claim 1, wherein: grinding unit includes first motor (61), roller (63) are changeed to first commentaries on classics roller (62) and second, first motor (61) are located location case (5) outer wall, first commentaries on classics roller (62) and second are changeed roller (63) and are all rotated and connect in location case (5), first motor (61) output shaft and first commentaries on classics roller (62) fixed connection, first motor (61) output shaft fixedly connected with first gear (611), second commentaries on classics roller (63) fixedly connected with and second gear (631) of first gear (611) looks meshing, be equipped with between first commentaries on classics roller (62) and second commentaries on classics roller (63) and walk material clearance (64) corresponding with discharging pipe (72).

3. A material crushing and grinding apparatus according to claim 2, wherein: the first rotating roller (62) and the second rotating roller (63) are fixedly connected with a plurality of protrusions (621).

4. A material crushing and grinding apparatus according to claim 2, wherein: the first motor (61) is connected with a linkage component for driving the centrifugal disc (33) to rotate, the linkage component comprises a vertical rod (81), a first bevel gear (82), a second bevel gear (83), a supporting plate (84), a third gear (85), a transmission gear (86) and a fourth gear (87), the outer barrel (2) is fixedly connected with a positioning sheet (22), the vertical rod (81) is rotatably connected with the positioning sheet (22), a rotating rod (622) penetrating through the positioning box (5) is fixedly connected with a first rotating roller (62), the first bevel gear (82) is fixedly connected with the rotating rod (622), the second bevel gear (83) is fixedly arranged on the vertical rod (81) and meshed with the first bevel gear (82), the supporting plate (84) penetrates through the inner barrel (3) and is fixedly connected with the inner barrel (3), the transmission gear (86) is rotatably connected with the supporting plate (84), the third gear (85) is fixedly connected with the lower end of the vertical rod (81), the fourth gear (87) is fixedly connected with the vertical rod (32), and the transmission gear (86) is respectively meshed with the third gear (85) and the fourth gear (87).

5. The material crushing and grinding device according to claim 4, wherein: the vertical rod (81) is fixedly connected with an elastic rope (811), and one end of the elastic rope (811) departing from the vertical rod (81) is fixedly connected with a knocking block (812) matched with the inner barrel (3).

6. A material crushing and grinding device according to claim 4, characterized in that: the supporting plate (84) is fixedly connected with a protective cover (841), and the third gear (85), the transmission gear (86) and the fourth gear (87) are all located in the protective cover (841).

7. The material crushing and grinding device according to claim 1, wherein: the lower end part of the vertical rod (32) is fixedly connected with a plurality of stirring blades (321) along the circumferential direction.

8. The material crushing and grinding device according to claim 1, wherein: the vertical rod (32) penetrates through the bottom plate (31) and is fixedly connected with a spiral conveying blade (322).