CN116984092A

CN116984092A - Alloy grinding equipment and automatic alloy sample preparation system

Info

Publication number: CN116984092A
Application number: CN202310974355.XA
Authority: CN
Inventors: 刘佳; 刘学智
Original assignee: Jiangsu Daimipu Intelligent Technology Co ltd
Current assignee: Jiangsu Daimipu Intelligent Technology Co ltd
Priority date: 2023-08-03
Filing date: 2023-08-03
Publication date: 2023-11-03

Abstract

The invention discloses alloy grinding equipment and an alloy automatic sample preparation system, and belongs to the technical field of metal grinding sample preparation. The turntable is rotatably arranged on the frame, and the turntable is provided with a grinding assembly through an adjusting seat assembly; the grinding assembly comprises an upper half shell and a lower half shell which are buckled relatively, and the axle center is provided with a rotary main shaft; the upper half shell is provided with a feeding hole, and an upper grinding assembly is arranged in the upper half shell; a discharging hole is formed in the center of the lower end of the lower half shell, a lower grinding assembly is arranged in the lower half shell, and a spring assembly is connected between the lower grinding assembly and the upper grinding assembly; a power device for driving the rotary main shaft is fixed on the upper half shell; the lower end of the rotary main shaft is fixed with a sweeping brush for cleaning the inner bottom surface of the lower half shell. The invention adopts the mode that the peripheral surface of the grinding disc and the conical wall surface are matched for grinding, and can provide larger grinding force along with the rotation of the grinding disc, thereby improving the grinding efficiency; adopts a vertically symmetrical funnel type grinding structure, and improves the grinding precision by multi-layer and multi-stage grinding.

Description

Alloy grinding equipment and automatic alloy sample preparation system

Technical Field

The invention relates to the technical field of metal grinding and sample preparation, in particular to alloy grinding equipment and an alloy automatic sample preparation system.

Background

The hard alloy powder is metal powder formed by partially or completely alloying two or more components, and is generally formed by crushing the alloy and then grinding the crushed alloy by a grinder.

The existing grinding machine is generally based on the principle of grinding metal particles by means of two grinding discs which are oppositely engaged and rotated, for example a cemented carbide powder grinding device (CN 216573340U) disclosed in chinese patent, comprising a supporting tray; the support tray comprises a mounting sleeve, the outer side of the support tray is provided with a mounting sleeve, and the mounting sleeve is provided with a locking bolt; the bottom connecting disc is clamped in the supporting tray; the top connection pad is above the bottom connection pad, and the top connection pad has a feed port. The grinding component grinds the alloy, and the grinding component is respectively clamped between the bottom connecting disc and the top connecting disc.

The grinding device mainly comprises the following working processes: alloy particles enter between the two grinding discs from the upper grinding disc, and when the two grinding discs rotate relatively, the alloy particles are slowly ground, and in the grinding process, the alloy particles gradually move out of the grinding discs to the outer side. The defects of the method are as follows: the two grinding discs are in surface contact, so that the friction force is large, and the grinding efficiency is affected; some of the alloy particles may slip outwardly along the corner of the grinding strip on the grinding disk, resulting in insufficient accuracy of grinding or uneven grinding.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides alloy grinding equipment and an automatic alloy sample preparation system. The alloy grinding equipment adopts the peripheral surface of the grinding disc and the conical wall surface for grinding, so that larger grinding force can be provided; the whole funnel-type multistage grinding disc is adopted, so that the grinding precision can be improved.

The invention adopts the following technical scheme: an alloy grinding device, which comprises a main body and a grinding head,

the grinding device comprises a frame and a vertical turntable rotatably arranged on the frame, wherein the turntable is provided with a grinding assembly through an adjusting seat assembly;

the grinding assembly comprises an upper half shell and a lower half shell which are buckled relatively, the inner surfaces of the upper half shell and the lower half shell are conical surfaces, and the axes of the upper half shell and the lower half shell are provided with a rotary main shaft;

the upper half shell is provided with a feeding hole, and an upper grinding assembly is arranged in the upper half shell;

the upper grinding assembly comprises a plurality of upper grinding discs sleeved on the rotary main shaft, and the upper grinding discs are stacked and fixed together; the upper grinding assembly further comprises an upper conical grinding cylinder sleeved and fixed in the upper half shell, and a grinding ring which is matched with the peripheral surface of the upper grinding disc in a relative manner is embedded and fixed on the inner wall of the upper conical grinding cylinder; the centers of the upper grinding disks are not coincident and are eccentrically arranged relative to the rotating main shaft, and grinding blocks are embedded and fixed at the positions of the upper grinding disks, which are close to the grinding ring;

a discharging hole is formed in the center of the lower end of the lower half shell, a lower grinding assembly symmetrical to the upper grinding assembly is arranged in the lower half shell, and a spring assembly is connected between the lower grinding assembly and the upper grinding assembly;

the upper end of the rotary main shaft penetrates through the upper half shell, and a power device for driving the rotary main shaft is fixed on the upper half shell; the lower end of the rotary main shaft is fixed with a sweeping brush for cleaning the inner bottom surface of the lower half shell.

Preferably: an inner spigot is arranged at the lower port of the upper half shell, and a compression ring for compressing the upper conical grinding cylinder is fixed in the inner spigot.

Preferably: the power device comprises a motor, and the motor is connected with the rotating main shaft through a speed reducer.

Preferably: the inner bottom surface of the lower half shell is a conical surface, and the broom is fixedly provided with a grinding strip matched with the inner bottom surface of the lower half shell.

Preferably: the spring assembly comprises a double-layer cylinder sliding sleeve;

the inner cylinder of the double-layer cylinder sliding sleeve is sleeved on the rotary main shaft in a sliding way, the upper end of the outer cylinder of the double-layer cylinder sliding sleeve is sleeved with an upper guide sleeve in a sliding way, the upper guide sleeve is fixedly connected with an upper grinding component, the lower end of the outer cylinder of the double-layer cylinder sliding sleeve is sleeved with a lower guide sleeve in a sliding way, the lower guide sleeve is fixedly connected with a lower grinding component,

an upper thrust spring is connected between the upper end of the double-layer cylinder sliding sleeve and the upper grinding assembly, and a lower thrust spring is connected between the lower end of the double-layer cylinder sliding sleeve and the lower grinding assembly.

Preferably: the adjusting seat assembly comprises a fixed supporting block fixed on the turntable and a movable supporting block slidably arranged on the turntable; the fixed supporting block is fixedly connected with the upper half shell of the grinding assembly, and the movable supporting block is fixedly connected with the lower half shell of the grinding assembly; and a locking mechanism for controlling the brake supporting block is also fixed on the turntable.

Preferably: the locking mechanism comprises a dovetail slideway fixed on the turntable and a lead screw rotatably arranged on the turntable, and the lead screw and the dovetail slideway are parallel to the upper half shell and the lower half shell; the movable supporting block is slidably arranged on the dovetail slideway and is in threaded connection with the screw rod; one end of the screw rod is fixed with an adjusting disc, and a handle is detachably connected to the adjusting disc.

Preferably: a rotary shaft is rotatably arranged on the frame, one end of the rotary shaft is fixedly connected with the turntable through a flange plate, the other end of the rotary shaft is connected with a driving wheel, and the driving wheel is connected with a power assembly for driving the driving wheel to rotate; and a positioning seat is also arranged on the frame, and a receiving cup opposite to the discharging hole of the grinding assembly is arranged on the positioning seat.

The double-acting jaw crusher comprises a box-type frame body, a feeding hopper is arranged at the upper end of the frame body, and a dust removing opening is formed at the lower end of the frame body; the frame body is internally provided with a crushing assembly, and a linear feeder is arranged below the crushing assembly; the feeding groove on the linear feeder is matched with the feeding hole of the crushing assembly; a discharge hole is formed in one side, close to the feed chute, of the frame body, and a material receiving box matched with the feed opening of the feed chute is arranged at the discharge hole.

Preferably: one end of the rotating shaft far away from the turntable is connected with a counterweight or the rotating shaft of another alloy grinding device.

An automatic alloy sample preparation system is characterized in that a secondary dividing machine, an automatic packaging machine and a plurality of alloy grinding devices are arranged around a carrying manipulator; one side of the secondary dividing machine is provided with a primary dividing machine, one side of the primary dividing machine is provided with a double-acting jaw crusher, and one side of the double-acting jaw crusher is provided with a lifting feeder.

The invention has the beneficial effects that:

the alloy grinding equipment adopts a mode that the peripheral surface of the grinding disc is matched with the conical wall surface for grinding, and can provide larger grinding force along with the rotation of the grinding disc, so that the grinding efficiency is improved;

the alloy grinding device adopts a funnel-type grinding structure which is vertically symmetrical, the multi-layer grinding discs are sequentially and eccentrically arranged, and the alloy crushed aggregates are sequentially ground from top to bottom; the grinding assembly can be inverted under the drive of the turntable, and the alloy material is ground for the second time, so that the grinding precision is improved; in addition, the upper and lower grinding structures of the alloy grinding device can be opened and closed, so that the replacement of the internal grinding member is very convenient;

the automatic alloy sample preparation system adopts a manipulator to replace workers and is matched with other equipment to sequentially finish various operations, so that the whole process of sample preparation is automatic, and the efficiency is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an alloy polishing apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an adjusting seat assembly according to a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a polishing assembly according to a first embodiment of the present invention.

Fig. 4 is a schematic view of the arrangement of the upper grinding disc of fig. 3.

Fig. 5 is a schematic view of the spring assembly at a in fig. 3.

Fig. 6 is a schematic view of the structure of the two alloy grinding apparatuses according to the first embodiment of the invention.

Reference numerals illustrate: 1. a frame; 2. a rotating shaft; 3. a driving wheel; 4. a flange plate; 5. a turntable;

6. an adjusting seat assembly; 61. a fixed supporting block; 62. a movable support block; 63. a screw rod; 64. dovetail slideway; 65. an adjusting plate;

7. a grinding assembly;

71. an upper half shell; 711. a feed hole; 712. a compression ring;

72. a lower half shell; 721. a discharge hole;

73. rotating the main shaft;

74. an upper grinding assembly; 741. a grinding disc is arranged; 742. grinding the blocks; 743. an upper conical grinding cylinder; 744. a grinding ring;

75. a lower grinding assembly; 76. a motor; 77. a speed reducer; 78. sweeping;

79. a spring assembly; 791. an upper thrust spring; 792. an upper guide sleeve; 793. a double-layer cylinder sliding sleeve; 794. a lower guide sleeve; 795. a lower thrust spring;

8. a receiving cup; 9. and a positioning seat.

FIG. 7 is a schematic diagram of an automatic two-alloy sample preparation system according to an embodiment of the present invention.

Reference numerals illustrate: 100. lifting the feeder; 200. a double-acting jaw crusher; 300. a first-level dividing machine; 400. a secondary dividing machine; 500. alloy grinding equipment; 600. a carrying manipulator; 700. and (5) an automatic bag sealing machine.

Fig. 8 is a front view of a triple double jaw crusher according to an embodiment of the invention.

Fig. 9 is a view in the direction B-B of fig. 8.

Reference numerals illustrate: 201. a feed hopper; 202. a frame body; 203. a discharge port; 204. crushing the assembly; 205. a feed chute; 206. a linear feeder; 207. a material receiving box; 208. a dust removing port.

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.

Example 1

Referring to fig. 1, an alloy grinding apparatus includes a housing in which components are mounted. A vertical beam is fixed on the frame 1, and a rotary shaft 2 is vertically and rotatably arranged on the vertical beam. The left end of the rotary shaft 2 is fixedly connected with a rotary disc 5 through a flange 4, and the rotary disc 5 is vertically arranged. The right end of the rotary shaft 2 is fixedly provided with a driving wheel 3. The driving wheel 3 is connected with a power assembly, such as a gear motor, for controlling the rotating shaft 2 to rotate slowly. The turntable 5 is provided with a grinding assembly 7 through an adjusting seat assembly 6. A receiving cup 8 is arranged on the positioning seat 9 of the frame 1, and the receiving cup 8 is opposite to the discharge hole 721 of the grinding assembly 7.

Referring to fig. 3, the polishing assembly 7 includes an upper half shell 71 and a lower half shell 72 which are engaged with each other, and a rotation main shaft 73 is provided in the axial center of the upper half shell 71 and the lower half shell 72. The upper end of the rotating main shaft 73 passes through the upper half shell 71. The power device comprises a motor 76 and a speed reducer 77 which are fixed on the upper half shell 71, wherein the motor 76 is connected with the rotating main shaft 73 through the speed reducer 77 and is used for driving the rotating main shaft 73 to rotate.

The inner surface of the upper half shell 71 is a conical surface, a feeding hole 711 is formed in the upper end surface of the upper half shell 71, and an upper grinding assembly 74 is installed in the upper half shell 71.

The upper grinding assembly 74 includes a plurality of upper grinding disks 741 sleeved on the rotating main shaft 73, the plurality of upper grinding disks 741 are stacked and fixed together, and the fixed upper grinding disks 741 can move a certain distance on the rotating main shaft 73. The upper conical grinding cylinder 743 is sleeved and fixed in the upper half shell 71, an inner spigot is arranged at the lower port of the upper half shell 71, a compression ring 712 is fixed in the inner spigot, and the compression ring 712 is used for compressing the upper conical grinding cylinder 743.

Fig. 4 is a schematic view of an eccentric arrangement of a plurality of upper grinding disks 741, in which the upper tapered grinding drums 743 are simplified to be straight drums for ease of understanding, and the upper grinding disks 741 are equal-diameter disks. It can be seen that the centers of the plurality of upper grinding disks 741 are misaligned and eccentric with respect to the rotation main shaft 73, and the centers of the plurality of upper grinding disks 741 are disposed equidistantly around the rotation main shaft 73, forming a spiral-like structure as a whole. The inner wall of the upper conical grinding cylinder 743 is embedded and fixed with a grinding ring 744 which is matched with the peripheral surface of the upper grinding disc 741 in a relative way, the part of the upper grinding disc 741 close to the grinding ring 744 is embedded and fixed with a grinding block 742, and the surface of the grinding block 742 and the surface of the grinding ring 744 are conical surfaces which are matched with each other.

The inner surface of the lower half shell 72 is a conical surface, a discharging hole 721 is formed in the center of the lower end of the lower half shell 72, and a lower grinding assembly 75 is installed in the lower half shell 72. The lower polishing member 75 is symmetrical to the upper polishing member 74, and the description of the lower polishing member 75 is omitted in this embodiment. The inner bottom surface of the lower half shell 72 is a conical surface, and the discharge hole 721 is formed at the lowest position of the inner bottom surface of the lower half shell 72. The lower end of the rotary main shaft 73 is fixed with a sweeping brush 78, and the sweeping brush 78 is fixed with a grinding strip matched with the inner bottom surface of the lower half shell 72. The sweeping brush 78 is used for sweeping the inner bottom surface of the lower half shell 72, and can be matched with the inner bottom surface of the lower half shell 72 to further grind materials, and the width of the sweeping brush 78 is smaller than that of the discharge hole 721, so that smooth outflow of the materials is ensured. In addition, both ends of the lower and upper grinding members 75 and 74 may be provided with convex tapered surfaces or cambered surfaces to prevent accumulation of materials.

Referring to fig. 5, a spring assembly 79 is connected between the lower and upper grinder assemblies 75 and 74, specifically: the inner cylinder of the double-layer cylinder sliding sleeve 793 is sleeved on the rotary main shaft 73 in a sliding manner, the upper guide sleeve 792 is sleeved at the upper end of the outer cylinder of the double-layer cylinder sliding sleeve 793 in a sliding manner, and the upper guide sleeve 792 is fixedly connected with the upper grinding assembly 74. The lower guide sleeve 794 is slidably sleeved at the lower end of the outer cylinder of the double-layer cylinder sliding sleeve 793, and the lower guide sleeve 794 is fixedly connected with the lower grinding assembly 75. An upper thrust spring 791 is connected between the upper end of the double-layer cylinder sliding sleeve 793 and the upper grinding assembly 74, and a lower thrust spring 795 is connected between the lower end of the double-layer cylinder sliding sleeve 793 and the lower grinding assembly 75.

Referring to fig. 2, the adjusting seat assembly 6 includes a fixed supporting block 61 and a movable supporting block 62, wherein the fixed supporting block 61 is fixed on the turntable 5, and the movable supporting block 62 is slidably mounted on a dovetail slideway 64 on the surface of the turntable 5. The fixed support block 61 is fixedly connected to the upper half shell 71, and the movable support block 62 is fixedly connected to the lower half shell 72. The screw 63 is rotatably mounted on the turntable 5, and the screw 63 and the dovetail slide 64 are parallel to the upper half-shell 71 and the lower half-shell 72. The movable supporting block 62 is in threaded connection with the screw rod 63, one end of the screw rod 63 is fixedly provided with an adjusting disc 65, and a handle is detachably connected to the adjusting disc 65. The upper half-shell 71 and the lower half-shell 72 can be controlled to be closed or separated by turning the adjusting disk 65 and the screw 63 by means of a handle. The screw 63 in this embodiment may be replaced with an oil cylinder or an air cylinder, so that the closing or separating of the upper half shell 71 and the lower half shell 72 may be more conveniently controlled.

As shown in fig. 6, the two alloy grinding apparatuses in this embodiment can connect the rotary shafts 2 to form a double station so as to balance the rotary shafts 2. A counterweight may be connected to one end of the rotating shaft 2 of the single alloy grinding apparatus to balance the rotating shaft 2.

Working principle:

opening the feed hole 711, allowing crushed alloy to enter the upper half shell from the feed hole 711, and closing the feed hole 711;

the motor 76 drives the rotary main shaft 73 to rotate through the speed reducer 77, the grinding assembly 7 starts to work, an upper grinding disc 741 and an upper conical grinding cylinder 743 in the upper grinding assembly 74 rotate relatively to grind the crushed alloy, the crushed alloy gradually enters the lower grinding assembly 75 downwards, and the lower grinding assembly 75 continues to grind the crushed alloy; the lowermost brush 78 also serves the function of grinding;

in the working process, the gear motor controls the rotary shaft 2 and the rotary table 5 to slowly rotate, the grinding assembly 7 starts to incline, so that crushed alloy below can flow back again, and the lower grinding assembly 75 and the upper grinding assembly 74 start to grind secondarily; in a specific setting, the grinding assembly 7 stays in a horizontal state and a vertical state for a certain time;

after finishing grinding, the grinding assembly 7 returns to the initial vertical state, the discharge hole 721 is opened, and the material is ensured to smoothly fall down to the receiving cup 8 under the rotation of the sweeping brush 78.

Example two

Referring to fig. 7, in accordance with the first embodiment, an automatic alloy sample preparation system includes: the secondary classifier 400, the automatic packing machine 700 and 3 alloy grinding devices 500 are arranged around the carrying manipulator 600, and the carrying manipulator 600 carries materials among the secondary classifier 400, the automatic packing machine 700 and 3 alloy grinding devices 500. The secondary dividing machine 400 is provided with a primary dividing machine 300 on one side, the primary dividing machine 300 is provided with a double-acting jaw crusher 200 on one side, and the double-acting jaw crusher 200 is provided with a lifting feeder 100 on one side.

In operation, incoming material is placed into the lift feeder 100, and the lift feeder 100 lifts and pours the material into the double jaw crusher 200. The crushed material of the double-acting jaw crusher 200 enters the primary dividing machine 300. The first-stage splitter 300 splits out selected samples, the rest enters a discarding bucket, and the selected samples enter the second-stage splitter 400. The second-stage splitter 400 splits out the reserved sample and the analysis sample, and the rest enters a waste collection box. The transport robot 600 transports the analysis sample to the alloy polishing apparatus 500. After the alloy grinding device 500 grinds the analysis sample, the grinded material is transported to the automatic packaging machine 700 by the transporting manipulator 600, and the material is packaged.

Example III

Referring to fig. 8 and 9, the double-acting jaw crusher 200 in the second embodiment includes a box-type frame 202, a feed hopper 201 is mounted at the upper end of the frame 202, and a dust removal opening 208 is formed at the lower end of the frame 202. The dust removal port 208 is externally connected with dust removal equipment and is used for removing dust in the frame 202 and cleaning particle dust generated during the operation of the crushing assembly 204. The crushing assembly 204 is fixed in the frame 202, and a linear feeder 206 is arranged below the crushing assembly 204. A feeding groove 205 on the linear feeder 206 is matched with the feeding opening of the crushing assembly 204 up and down relatively, and crushed materials of the crushing assembly 204 fall down to the feeding groove 205. A discharge hole 203 is formed in one side, close to the feed chute 205, of the frame 202, a material receiving box 207 is arranged at the discharge hole 203, and the material receiving box 207 is used for receiving materials conveyed by the feed chute 205.

In operation, the lift feeder 100 lifts and pours material into the feed hopper 201 of the double jaw crusher 200, the material falling down the feed hopper 201 to the crushing assembly 204; after the crushing assembly 204 is started, crushing the materials, and the crushed materials fall into the feeding groove 205; the chute 205 conveys the crushed material to the receiving bin 207, to which the crushing of the material is completed.

The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims

1. An alloy grinding device, which comprises a main body and a grinding head,

the method is characterized in that:

comprises a frame (1) and a vertical turntable (5) rotatably arranged on the frame (1), wherein a grinding assembly (7) is arranged on the turntable (5) through an adjusting seat assembly (6);

the grinding assembly (7) comprises an upper half shell (71) and a lower half shell (72) which are buckled relatively, wherein the inner surfaces of the upper half shell (71) and the lower half shell (72) are conical surfaces, and the axes of the upper half shell (71) and the lower half shell (72) are provided with a rotary main shaft (73);

a feeding hole (711) is formed in the upper half shell (71), and an upper grinding assembly (74) is arranged in the upper half shell (71);

the upper grinding assembly (74) comprises a plurality of upper grinding disks (741) sleeved on the rotary main shaft (73), and the upper grinding disks (741) are stacked and fixed together; the upper grinding assembly (74) further comprises an upper conical grinding cylinder (743) sleeved and fixed in the upper half shell (71), and a grinding ring (744) which is matched with the peripheral surface of the upper grinding disc (741) relatively is embedded and fixed on the inner wall of the upper conical grinding cylinder (743); the centers of the upper grinding disks (741) are not coincident and are eccentrically arranged relative to the rotating main shaft (73), and grinding blocks (742) are embedded and fixed at the positions, close to the grinding rings (744), of the upper grinding disks (741);

a discharge hole (721) is formed in the center of the lower end of the lower half shell (72), a lower grinding assembly (75) symmetrical to the upper grinding assembly (74) is arranged in the lower half shell (72), and a spring assembly (79) is connected between the lower grinding assembly (75) and the upper grinding assembly (74);

the upper end of the rotary main shaft (73) passes through the upper half shell (71), and a power device for driving the rotary main shaft (73) is fixed on the upper half shell (71); the lower end of the rotary main shaft (73) is fixed with a sweeping brush (78) for cleaning the inner bottom surface of the lower half shell (72).

2. The alloy grinding apparatus defined in claim 1, wherein: an inner spigot is arranged at the lower port of the upper half shell (71), and a compression ring (712) for compressing the upper conical grinding cylinder (743) is fixed in the inner spigot;

the inner bottom surface of the lower half shell (72) is a conical surface, and the sweeping brush (78) is fixedly provided with a grinding strip matched with the inner bottom surface of the lower half shell (72).

3. The alloy grinding apparatus defined in claim 1, wherein: the power device comprises a motor (76), and the motor (76) is connected with the rotary main shaft (73) through a speed reducer (77).

4. The alloy grinding apparatus defined in claim 1, wherein: the spring assembly (79) includes a double-layer barrel slip sleeve (793);

the inner cylinder of the double-layer cylinder sliding sleeve (793) is sleeved on the rotary main shaft (73) in a sliding way, the upper end of the outer cylinder of the double-layer cylinder sliding sleeve (793) is sleeved with an upper guide sleeve (792) in a sliding way, the upper guide sleeve (792) is fixedly connected with an upper grinding component (74), the lower end of the outer cylinder of the double-layer cylinder sliding sleeve (793) is sleeved with a lower guide sleeve (794) in a sliding way, the lower guide sleeve (794) is fixedly connected with a lower grinding component (75),

an upper thrust spring (791) is connected between the upper end of the double-layer cylinder sliding sleeve (793) and the upper grinding assembly (74), and a lower thrust spring (795) is connected between the lower end of the double-layer cylinder sliding sleeve (793) and the lower grinding assembly (75).

5. The alloy grinding apparatus defined in claim 1, wherein: the adjusting seat assembly (6) comprises a fixed supporting block (61) fixed on the rotary table (5) and a movable supporting block (62) slidably arranged on the rotary table (5); the fixed supporting block (61) is fixedly connected with the upper half shell (71) of the grinding assembly (7), and the movable supporting block (62) is fixedly connected with the lower half shell (72) of the grinding assembly (7); and a locking mechanism for controlling the brake supporting block (62) is also fixed on the turntable (5).

6. The alloy grinding apparatus defined in claim 5, wherein: the locking mechanism comprises a dovetail slide way (64) fixed on the turntable (5) and a screw rod (63) rotatably installed on the turntable (5), wherein the screw rod (63) and the dovetail slide way (64) are parallel to the upper half shell (71) and the lower half shell (72); the movable supporting block (62) is slidably arranged on the dovetail slideway (64), and the movable supporting block (62) is in threaded connection with the screw rod (63); one end of the screw rod (63) is fixed with an adjusting disc (65), and a handle is detachably connected to the adjusting disc (65).

7. The alloy grinding apparatus defined in claim 1, wherein: a rotary shaft (2) is rotatably arranged on the frame (1), one end of the rotary shaft (2) is fixedly connected with the rotary table (5) through a flange plate (4), the other end of the rotary shaft (2) is connected with a driving wheel (3), and the driving wheel (3) is connected with a power assembly for driving the driving wheel (3) to rotate; the machine frame (1) is also provided with a positioning seat (9), and a receiving cup (8) opposite to the discharging hole (721) of the grinding assembly (7) is arranged on the positioning seat (9).

8. An alloy grinding apparatus as set forth in claim 7 wherein: one end of the rotary shaft (2) far away from the turntable (5) is connected with a rotary shaft (2) of a counterweight or another alloy grinding device.

9. An automatic alloy sample preparation system, which adopts the alloy grinding equipment of any one of claims 1 to 8, and is characterized in that: a secondary dividing machine (400), an automatic packaging machine (700) and a plurality of alloy grinding devices (500) are arranged around the conveying mechanical arm (600); one side of the secondary dividing machine (400) is provided with a primary dividing machine (300), one side of the primary dividing machine (300) is provided with a double-acting jaw crusher (200), and one side of the double-acting jaw crusher (200) is provided with a lifting feeder (100).

10. The automated alloy sample preparation system of claim 9, wherein: the double-acting jaw crusher (200) comprises a box-type frame body (202), a feed hopper (201) is arranged at the upper end of the frame body (202), and a dust removing opening (208) is formed at the lower end of the frame body (202); a crushing assembly (204) is arranged in the frame body (202), and a linear feeder (206) is arranged below the crushing assembly (204); a feeding groove (205) on the linear feeder (206) is matched with a feed opening of the crushing assembly (204); a discharge hole (203) is formed in one side, close to the feed chute (205), of the frame body (202), and a material receiving box (207) matched with the discharge hole of the feed chute (205) is arranged at the discharge hole (203).