Grinding device for heavy calcium carbonate

Abstract

The invention provides a ground calcium carbonate grinding device which comprises a grinding rotor and a power assembly, the outer side of the grinding rotor is sleeved with a grinding stator, a grinding channel is formed between the grinding rotor and the grinding stator, and the grinding rotor and the grinding stator are connected with a first cooling structure and a second cooling structure respectively; each of the first cooling structure and the second cooling structure comprises an evaporation cavity and a component; a water supply chamber is formed between one end of the water supply piston and the component, a first elastic piece is arranged between the other end of the water supply piston and the component, and a pneumatic chamber is formed between one end of the pneumatic piston and the component; the water supply chamber is connected with a water source through a water inlet channel and connected with the evaporation cavity through a water conveying channel, and the water inlet channel and the water conveying channel are connected with a first check valve and a second check valve respectively. The evaporation cavity is connected with the pneumatic chamber through a steam conveying channel; the pneumatic chamber is connected with the input end of the grinding channel through the steam exhaust channel. Heat generated in the dry grinding process can be effectively taken away.

Description

Technical Field

[0001] The invention relates to the technical field of calcium carbonate processing, in particular to a grinding device for heavy calcium carbonate. Background Art

[0002] Calcium carbonate is a neutral inorganic compound, commonly known as limestone, limestone, stone powder, marble, etc. It is difficult to dissolve in water, but soluble in hydrochloric acid. Calcium carbonate is not only an important building material, but also plays a key role as a filler and pigment in the production of modern polymer-based composite materials, plastics, rubber, adhesives, paints and coatings, and high-grade paper. In recent years, with the continuous expansion of market demand, calcium carbonate has become one of the largest industrial mineral raw materials used in the global paper and plastics industries.

[0003] During the production process, calcium carbonate often needs to be ground for the convenience of subsequent processing. Existing calcium carbonate grinding methods are mainly divided into dry grinding and wet grinding. However, during the dry grinding process, existing grinding devices generate a lot of heat. This heat may not only cause changes in the properties of calcium carbonate, thereby affecting the quality of the finished calcium carbonate product, but may also be transferred to the grinding parts, causing the grinding parts to overheat, thereby affecting the grinding accuracy of the grinding parts and reducing their service life. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a grinding device for heavy calcium carbonate, which can effectively remove the heat generated during dry grinding.

[0005] The present invention adopts the following technical solutions.

[0006] A grinding device for heavy calcium carbonate comprises a grinding rotor and a power assembly connected to the grinding rotor in a transmission manner, wherein a grinding stator is sleeved on the outer side of the grinding rotor, a grinding channel is formed between the grinding rotor and the grinding stator, and the grinding rotor and the grinding stator are respectively connected to a first cooling structure and a second cooling structure;

[0007] The first cooling structure and the second cooling structure both include an evaporation chamber and a component;

[0008] A water supply piston and a pneumatic piston are sealed and slidably connected in the component, a water supply chamber is formed between one end of the water supply piston and the component, a first elastic member is provided between the other end of the water supply piston and the component, a pneumatic chamber is formed between one end of the pneumatic piston and the component, the water supply piston and the pneumatic piston are arranged in linkage, and the volumes of the water supply chamber and the pneumatic chamber are in direct proportion;

[0009] The water supply chamber is connected to a water source through a water inlet channel, and is connected to the evaporation chamber through a water delivery channel, and the water inlet channel and the water delivery channel are respectively connected to a first check valve and a second check valve;

[0010] The evaporation chamber is connected to the pneumatic chamber through a steam delivery channel;

[0011] The pneumatic chamber is connected to the input end of the grinding channel through the exhaust channel.

[0012] Further, the component of the first cooling structure includes a cylinder body arranged coaxially with the grinding rotor, and the cylinder body and the grinding rotor are rotatably matched;

[0013] An annular water supply groove, steam supply groove and steam exhaust groove are provided on the outer side wall of the cylinder body. The water supply chamber is connected to the water supply channel through the water supply groove, the steam supply channel is connected to the pneumatic chamber through the steam supply groove, and the pneumatic chamber is connected to the steam exhaust channel through the steam exhaust groove.

[0014] Furthermore, the components of the second cooling structure include a shell sleeved on the outside of the grinding stator, and the shell is integrally connected to the grinding stator.

[0015] Furthermore, the first cooling structure and the second cooling structure are both provided with a plurality of exhaust passages which are evenly distributed around the axis of the grinding rotor.

[0016] Furthermore, a conical screen bucket is provided below the output end of the grinding channel, and the tip of the screen bucket is arranged upward;

[0017] A first material discharge channel is provided below the screen bucket, and a second material discharge channel is provided outside the screen bucket.

[0018] Furthermore, the water supply piston and the pneumatic piston of the first cooling structure are connected as a whole through a first transmission rod, and the bottom end of the first transmission rod is provided with an impact head capable of impacting the screen bucket.

[0019] Furthermore, the water supply piston and the pneumatic piston of the second cooling structure are connected as a whole through a second transmission rod, and the top end of the second transmission rod is connected to an extrusion ring through a rib plate, and the extrusion ring is located above the input end of the grinding channel.

[0020] Furthermore, the output end of the power assembly is integrally connected to a vertically extending rotating shaft, a flange sleeve is rotatably sleeved on the rotating shaft, and the flange sleeve is integrally connected to the top end of the grinding rotor;

[0021] A guide groove is provided on the outer wall of the rotating shaft, and the guide groove spirally extends upward in the opposite direction of the rotation direction of the rotating shaft. A guide pin slidingly matched with the guide groove is provided on the inner wall of the flange sleeve, and a second elastic member is provided between the bottom end of the rotating shaft and the flange sleeve.

[0022] Furthermore, a water pump is connected between the water inlet channel and the water source, and the water pump is arranged in parallel with the first check valve.

[0023] The beneficial effects of the present invention are:

[0024] In the initial state, the first elastic member keeps the water supply piston at the position where the water supply chamber has the smallest volume, and the pneumatic piston is also kept at the position where the pneumatic chamber has the smallest volume. At this time, the exhaust passage is closed by the pneumatic piston.

[0025] During the dry grinding operation, the heat of the grinding rotor and the grinding stator is transferred to the evaporation chambers of the first cooling structure and the second cooling structure respectively. The cooling water in the evaporation chamber absorbs the heat and turns into steam. Then, the steam enters the pneumatic chamber through the steam delivery channel, increasing the air pressure in the pneumatic chamber, thereby pushing the pneumatic piston to move in the direction of increasing the volume of the pneumatic chamber. The movement of the pneumatic piston drives the water supply piston to move in the direction of increasing the volume of the water supply chamber, thereby sucking cooling water into the water supply chamber.

[0026] When the pneumatic piston moves to the predetermined position, the exhaust passage is opened, and the steam in the pneumatic chamber flows into the input end of the grinding passage through the exhaust passage. As the steam flows away, the air pressure in the pneumatic chamber decreases, and the first elastic member pushes the water supply piston and the pneumatic piston to return to their initial state. In the process of the water supply piston returning to its initial state, it injects the cooling water in the water supply chamber into the evaporation chamber again to prepare for the next cycle. The above process is repeated, and cooling water is continuously injected into the evaporation chamber to absorb heat, and the steam formed after absorbing heat is discharged through the exhaust passage, thereby effectively taking away the heat generated during the dry grinding process.

[0027] In addition, the steam flowing into the input end of the grinding channel can preheat and moisten the calcium carbonate before grinding. Preheating can slightly reduce the hardness of the calcium carbonate particles, and moistening can form a layer of water film on the surface of the calcium carbonate particles, thereby effectively reducing the friction and electrostatic adsorption effect between the calcium carbonate particles, making the grinding process smoother, reducing energy consumption, and improving grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0030] Figure 2 for Figure 1 A magnified view of the P part;

[0031] Figure 3 for Figure 1 Enlarged view of the Q part;

[0032] Figure 4 for Figure 1 Enlarged view of the R part;

[0033] Figure 5 Schematic diagram of the structure of the grinding rotor of this embodiment.

[0034] Description of reference numerals:

[0035] 11. Grinding rotor; 12. Grinding stator; 13. Grinding channel;

[0036] 2. Powertrain;

[0037] 21. Rotating shaft; 211. Guide groove;

[0038] 22. Flange sleeve; 221. Guide pin;

[0039] 23. a second elastic member;

[0040] 31. a first cooling structure; 32. a second cooling structure;

[0041] 3a, evaporation chamber; 3b, water supply piston; 3c, pneumatic piston; 3d, water supply chamber; 3e, first elastic member; 3f, pneumatic chamber; 3g, water inlet channel; 3h, water source; 3i, water supply channel; 3j, first check valve; 3k, second check valve; 3m, steam supply channel; 3n, exhaust channel;

[0042] 311, cylinder body; 312, first transmission rod; 313, impact head;

[0043] 321, housing; 322, second transmission rod; 323, rib plate; 324, extrusion ring;

[0044] 4. Screen bucket; 41. First discharge channel; 42. Second discharge channel;

[0045] 5. Water pump. DETAILED DESCRIPTION

[0046] The drawings are only used for illustrative purposes and should not be construed as limitations of this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product.

[0047] For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The technical solution of the present invention is further described below in conjunction with the drawings and embodiments.

[0048] As shown in the accompanying drawings, a grinding device for heavy calcium carbonate comprises a grinding rotor 11 and a power assembly 2 which is transmission-connected to the grinding rotor 11. A grinding stator 12 is sleeved on the outer side of the grinding rotor 11. A grinding channel 13 is formed between the grinding rotor 11 and the grinding stator 12. The grinding rotor 11 and the grinding stator 12 are respectively connected to a first cooling structure 31 and a second cooling structure 32.

[0049] The first cooling structure 31 and the second cooling structure 32 both include an evaporation chamber 3 a and components. The evaporation chamber 3 a of the first cooling structure 31 is disposed in the grinding rotor 11 , and the evaporation chamber 3 a of the second cooling structure 32 is disposed in the grinding stator 12 .

[0050] A water supply piston 3b and a pneumatic piston 3c are sealed and slidably connected in the component, a water supply chamber 3d is formed between one end of the water supply piston 3b and the component, a first elastic member 3e is provided between the other end of the water supply piston 3b and the component, a pneumatic chamber 3f is formed between one end of the pneumatic piston 3c and the component, the water supply piston 3b and the pneumatic piston 3c are linked, and the volumes of the water supply chamber 3d and the pneumatic chamber 3f are in direct proportion; the elastic force of the first elastic member 3e is used to push the water supply piston 3b and the pneumatic piston 3c to move in the direction of reducing the volumes of the water supply chamber 3d and the pneumatic chamber 3f, respectively. In this embodiment, the first elastic member 3e is a spring.

[0051] The water supply chamber 3d is connected to the water source 3h through the water inlet channel 3g, and is connected to the evaporation chamber 3a through the water delivery channel 3i. The water inlet channel 3g and the water delivery channel 3i are respectively connected to the first check valve 3j and the second check valve 3k; the first check valve 3j is used to prevent the cooling water in the water supply chamber 3d from flowing backward to the water source 3h through the water inlet channel 3g, and the second check valve 3k is used to prevent the cooling water in the evaporation chamber 3a from flowing backward to the water supply chamber 3d through the water delivery channel 3i;

[0052] The evaporation chamber 3a is connected to the pneumatic chamber 3f through the steam delivery channel 3m;

[0053] The pneumatic chamber 3f is connected to the input end of the grinding channel 13 through the exhaust channel 3n; when the pneumatic piston 3c is at the position where the volume of the pneumatic chamber 3f is the smallest, the side wall of the pneumatic piston 3c will block the exhaust channel 3n, thereby closing the exhaust channel 3n; as the air pressure in the pneumatic chamber 3f rises, the air pressure pushes the pneumatic piston 3c to move in the direction of increasing the volume of the pneumatic chamber 3f. When the pneumatic piston 3c moves to a predetermined position, the side wall of the pneumatic piston 3c is offset from the exhaust channel 3n, thereby opening the exhaust channel 3n.

[0054] In the initial state, the first elastic member 3e keeps the water supply piston 3b at the position where the volume of the water supply chamber 3d is the smallest, and the pneumatic piston 3c is also kept at the position where the volume of the pneumatic chamber 3f is the smallest. At this time, the exhaust passage 3n is closed by the pneumatic piston 3c.

[0055] During the dry grinding operation, the heat of the grinding rotor 11 and the grinding stator 12 is transferred to the evaporation chamber 3a of the first cooling structure 31 and the second cooling structure 32 respectively. The cooling water in the evaporation chamber 3a absorbs the heat and turns into steam. Then, the steam enters the pneumatic chamber 3f through the steam delivery channel 3m, increasing the air pressure in the pneumatic chamber 3f, thereby pushing the pneumatic piston 3c to move in the direction of increasing the volume of the pneumatic chamber 3f. The movement of the pneumatic piston 3c drives the water supply piston 3b to move in the direction of increasing the volume of the water supply chamber 3d, thereby sucking the cooling water into the water supply chamber 3d.

[0056] When the pneumatic piston 3c moves to a predetermined position, the exhaust passage 3n is opened, allowing the steam in the pneumatic chamber 3f to flow into the input end of the grinding channel 13 through the exhaust passage 3n. As the steam flows away, the air pressure in the pneumatic chamber 3f decreases, so the first elastic member 3e pushes the water supply piston 3b and the pneumatic piston 3c to return to the initial state. In the process of the water supply piston 3b returning to the initial state, it injects the cooling water in the water supply chamber 3d into the evaporation chamber 3a again, thereby preparing for the next cycle. It should be noted that in order to prevent the cooling water in the evaporation chamber 3a from entering the pneumatic chamber 3f, the maximum volume of the water supply chamber 3d is designed to be smaller than the volume of the evaporation chamber 3a. In this embodiment, the maximum volume of the water supply chamber 3d is two-thirds of the evaporation chamber 3a. In addition, the pneumatic piston 3c is configured so that when the pressure in the pneumatic chamber 3f reaches a predetermined value, the pneumatic piston 3c moves to the position of opening the exhaust passage 3n. The predetermined value is determined based on the gas pressure value that can be reached in the evaporation chamber 3a after all the cooling water in the evaporation chamber 3a is evaporated.

[0057] The above process is repeated, so that the pneumatic piston 3c moves up and down, and continuously injects cooling water into the evaporation chamber 3a to absorb heat. The steam generated by the cooling water absorbing heat is discharged through the exhaust channel 3n, and finally takes away the heat generated during the dry grinding process.

[0058] In addition, the steam flowing into the input end of the grinding channel 13 can preheat and moisten the calcium carbonate particles before grinding. Preheating can slightly reduce the hardness of the calcium carbonate particles, and moistening can form a layer of water film on the surface of the calcium carbonate particles, thereby effectively reducing the friction and electrostatic adsorption effect between the calcium carbonate particles, making the grinding process smoother, reducing energy consumption, and improving grinding efficiency.

[0059] Preferably, the components of the first cooling structure 31 include a cylinder 311 coaxially arranged with the grinding rotor 11, and the cylinder 311 is rotatably matched with the grinding rotor 11;

[0060] An annular water supply groove, steam supply groove and exhaust groove are provided on the outer wall of the cylinder body 311. The water supply chamber 3d is connected to the water supply channel 3i through the water supply groove, the steam supply channel 3m is connected to the pneumatic chamber 3f through the steam supply groove, and the pneumatic chamber 3f is connected to the exhaust channel 3n through the exhaust groove. A plurality of sealing rings are provided between the grinding rotor 11 and the cylinder body 311. These sealing rings are respectively located at the upper and lower sides of the water supply groove, the steam supply groove and the exhaust groove to prevent cooling water and steam from leaking from the water supply groove, the steam supply groove and the exhaust groove.

[0061] Preferably, the components of the second cooling structure 32 include a shell 321 sleeved on the outside of the grinding stator 12 , and the shell 321 is integrally connected to the grinding stator 12 .

[0062] Preferably, the exhaust channels 3n of the first cooling structure 31 and the second cooling structure 32 are provided with a plurality of exhaust channels 3n and are evenly distributed around the axis of the grinding rotor 11. The evenly distributed plurality of exhaust channels 3n can evenly disperse the steam to the input end of the grinding channel 13, thereby evenly preheating and wetting the calcium carbonate particles at the input end of the grinding channel 13.

[0063] Preferably, a conical screen bucket 4 is provided below the output end of the grinding channel 13, and the tip of the screen bucket 4 is arranged upward;

[0064] A first discharge channel 41 is provided below the sieve bucket 4, and a second discharge channel 42 is provided outside the sieve bucket 4. The sieve bucket 4 sieves the ground calcium carbonate, and the calcium carbonate that meets the requirements passes through the sieve holes of the sieve bucket 4 and falls into the first discharge channel 41 below; while the calcium carbonate that does not meet the requirements rolls down along the outer wall of the sieve bucket 4 and finally falls into the second discharge channel 42.

[0065] Preferably, the water supply piston 3b and the pneumatic piston 3c of the first cooling structure 31 are connected as a whole through the first transmission rod 312, and the bottom end of the first transmission rod 312 is provided with a collision head 313 capable of striking the screen bucket 4. Driven by the water supply piston 3b of the first cooling structure 31, the collision head 313 on the first transmission rod 312 moves up and down, thereby continuously striking the screen bucket 4, causing the screen bucket 4 to vibrate. This vibration not only allows the calcium carbonate particles that meet the requirements stuck in the sieve hole to fall smoothly, but also allows the calcium carbonate particles that do not meet the requirements attached to the outer wall of the screen bucket 4 to roll off, thereby cleaning the screen bucket 4 to prevent it from being blocked.

[0066] In dry grinding operation, oversized calcium carbonate particles are difficult to enter the grinding channel 13 and can only follow the movement of the grinding rotor 11, thereby reducing the grinding efficiency. Preferably, the water supply piston 3b of the second cooling structure 32 is connected to the pneumatic piston 3c as a whole through the second transmission rod 322, and the top of the second transmission rod 322 is connected to the extrusion ring 324 through the rib 323, and the extrusion ring 324 is located above the input end of the grinding channel 13. Driven by the water supply piston 3b of the second cooling structure 32, the extrusion ring 324 on the second transmission rod 322 moves up and down, thereby pressing the oversized calcium carbonate particles into the grinding channel 13, which is conducive to improving the grinding efficiency.

[0067] Preferably, the output end of the power assembly 2 is integrally connected to a vertically extending rotating shaft 21, a flange sleeve 22 is rotatably sleeved on the rotating shaft 21, and the flange sleeve 22 is integrally connected to the top end of the grinding rotor 11; in this embodiment, the power assembly 2 includes a motor and a reduction gearbox.

[0068] In order to prevent the grinding rotor 11 from getting stuck due to too many calcium carbonate particles in the grinding channel 13, a guide groove 211 is provided on the outer wall of the rotating shaft 21. The guide groove 211 spirally extends upward in the opposite direction of the rotation direction of the rotating shaft 21. A guide pin 221 that slides with the guide groove 211 is provided on the inner wall of the flange sleeve 22. A second elastic member 23 is provided between the bottom end of the rotating shaft 21 and the flange sleeve 22. The second elastic member 23 makes the grinding rotor 11 have a tendency to move away from the rotating shaft 21 and approach the grinding stator 12. When the rotation resistance encountered by the grinding rotor 11 is too large, the flange sleeve 22 will overcome the elastic force of the second elastic member 23 under the cooperation of the guide groove 211 and the guide pin 221, and drive the grinding rotor 11 to move in the direction away from the grinding stator 12, thereby expanding the grinding channel 13, allowing the calcium carbonate particles accumulated in the grinding channel 13 to fall off, and preventing the grinding rotor 11 from getting stuck due to too many calcium carbonate particles in the grinding channel 13.

[0069] Preferably, a water pump 5 is connected between the water inlet channel 3g and the water source 3h, and the water pump 5 is arranged in parallel with the first check valve 3j.

[0070] During the dry grinding operation, the water pump 5 does not work. At this time, the device uses the steam formed after the cooling water in the evaporation chamber 3a absorbs heat to drive the pneumatic piston 3c to move up and down. The movement of the pneumatic piston 3c then drives the water supply piston 3b to move up and down, thereby realizing that the cooling water of the water source 3h can be continuously injected into the evaporation chamber 3a without the water pump 5. In this way, not only can the heat generated during the dry grinding process be effectively taken away, but also the calcium carbonate particles at the input end of the grinding channel 13 can be preheated and moistened. When the water pump 5 is started, the water pump 5 will deliver a pulsed water flow to the water inlet channel 3g. The pulsed water flow will also drive the water supply piston 3b to move up and down, and make the impact head 313 and the extrusion ring 324 also move up and down. Finally, the pulsed water flow flows into the grinding channel 13 through the exhaust channel 3n to achieve wet grinding of calcium carbonate.

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A grinding device for heavy calcium carbonate, comprising a grinding rotor and a power assembly connected to the grinding rotor, wherein a grinding stator is sleeved on the outer side of the grinding rotor, and a grinding channel is formed between the grinding rotor and the grinding stator, characterized in that: The grinding rotor and the grinding stator are respectively connected with a first cooling structure and a second cooling structure; The first cooling structure and the second cooling structure both include an evaporation chamber and a component; A water supply piston and a pneumatic piston are sealed and slidably connected in the component, a water supply chamber is formed between one end of the water supply piston and the component, a first elastic member is provided between the other end of the water supply piston and the component, a pneumatic chamber is formed between one end of the pneumatic piston and the component, the water supply piston and the pneumatic piston are arranged in linkage, and the volumes of the water supply chamber and the pneumatic chamber are in direct proportion; The water supply chamber is connected to a water source through a water inlet channel, and is connected to the evaporation chamber through a water delivery channel, and the water inlet channel and the water delivery channel are respectively connected to a first check valve and a second check valve; The evaporation chamber is connected to the pneumatic chamber through a steam delivery channel; The pneumatic chamber is connected to the input end of the grinding channel through the exhaust channel.

2. A grinding device for heavy calcium carbonate according to claim 1, characterized in that: The components of the first cooling structure include a cylinder body coaxially arranged with the grinding rotor, and the cylinder body and the grinding rotor are rotatably matched; An annular water supply groove, steam supply groove and steam exhaust groove are provided on the outer side wall of the cylinder body. The water supply chamber is connected to the water supply channel through the water supply groove, the steam supply channel is connected to the pneumatic chamber through the steam supply groove, and the pneumatic chamber is connected to the steam exhaust channel through the steam exhaust groove.

3. A grinding device for heavy calcium carbonate according to claim 1, characterized in that: The components of the second cooling structure include a shell sleeved on the outside of the grinding stator, and the shell is integrally connected to the grinding stator.

4. A grinding device for heavy calcium carbonate according to claim 1, characterized in that: The exhaust passages of the first cooling structure and the second cooling structure are both provided with a plurality of exhaust passages which are evenly distributed around the axis of the grinding rotor.

5. A grinding device for heavy calcium carbonate according to claim 1, characterized in that: A conical screen bucket is provided below the output end of the grinding channel, and the tip of the screen bucket is arranged upward; A first material discharge channel is provided below the screen bucket, and a second material discharge channel is provided outside the screen bucket.

6. A grinding device for heavy calcium carbonate according to claim 5, characterized in that: The water supply piston and the pneumatic piston of the first cooling structure are connected as a whole through a first transmission rod, and the bottom end of the first transmission rod is provided with an impact head capable of impacting the screen bucket.

7. A grinding device for heavy calcium carbonate according to claim 1, characterized in that: The water supply piston and the pneumatic piston of the second cooling structure are connected as a whole through a second transmission rod. The top end of the second transmission rod is connected with an extrusion ring through a rib plate. The extrusion ring is located above the input end of the grinding channel.

8. A grinding device for heavy calcium carbonate according to claim 1, characterized in that: The output end of the power assembly is integrally connected to a vertically extending rotating shaft, a flange sleeve is rotatably sleeved on the rotating shaft, and the flange sleeve is integrally connected to the top end of the grinding rotor; A guide groove is provided on the outer wall of the rotating shaft, and the guide groove spirally extends upward in the opposite direction of the rotation direction of the rotating shaft. A guide pin slidingly matched with the guide groove is provided on the inner wall of the flange sleeve, and a second elastic member is provided between the bottom end of the rotating shaft and the flange sleeve.

9. A grinding device for heavy calcium carbonate according to claim 1, characterized in that: A water pump is connected between the water inlet channel and the water source, and the water pump is arranged in parallel with the first check valve.

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