A high-efficiency and stable performance sand mill

Abstract

The invention discloses a high-efficiency and stable-performance sand mill, comprising a foot, a frame, a sewage outlet, a cylinder cover, a feed port, a grinding rotor, an electric contact pressure gauge, an outer cylinder, an inner cylinder, a rotor gland, a shaft sleeve, a main shaft, a screen, a first discharge turbine, a second discharge turbine, a discharging moving ring, a discharging static ring, a discharging flange, a discharging port, a mechanical seal, a bearing seat and a driving motor. The grinding efficiency is increased because the discharging device is close to the main shaft. When the equipment is running, particles with larger particle sizes are close to the inside of the cylinder and cannot flow out. They can only flow out when they reach a certain fineness. The energy utilization rate is high. The original discharging device is on the cylinder, so large particles are easy to flow out, while fine particles are not easy to flow out, so the energy utilization rate is low. The screen has a long service life. Because the screen is fixed in the turbine, the screen does not contact the grinding medium and is not worn. The mechanical seal has a long service life.

Description

Technical Field

[0001] The invention relates to ultrafine grinding equipment, in particular to a sand mill with high efficiency and stable performance. Background Art

[0002] Sand mill is the most widely adaptable, most advanced and most efficient grinding equipment. According to the performance, it can be roughly divided into horizontal sand mill, basket sand mill, vertical sand mill, etc. The grinding chamber of the sand mill is relatively narrow, the clearance of the lever is small, and the grinding energy is relatively intensive. With the high-performance cooling system and automatic control system, it can realize continuous processing and continuous discharge of materials, greatly improving the production efficiency. In particular, the large horizontal sand mill among sand mills has become a reality for the ultra-fine grinding of mineral powder due to the maturity of design and manufacturing technology in recent years. Summary of the invention

[0003] The object of the present invention is to provide a sand mill with high efficiency and stable performance to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A high-efficiency and stable performance sand mill, comprising feet, a frame, a sewage outlet, a cylinder cover, a feed port, a grinding rotor, an electric contact pressure gauge, an outer cylinder, an inner cylinder, a rotor gland, a shaft sleeve, a main shaft, a screen, a discharge turbine 1, a discharge turbine 2, a discharge dynamic ring, a discharge static ring, a discharge flange, a discharge port, a mechanical seal, a bearing seat and a drive motor. The frame is the main support of the sand mill, and the bottom surface of the frame is fixedly connected with six feet, and the feet are bolted and fixedly connected to the bolt seat set on the bottom surface of the frame for supporting and grinding the machine, and the balance of the frame can be adjusted by rotating the bolts, and the right end of the top surface of the frame is fixedly connected with the bearing seat and the transmission box, and the right side of the bearing seat is fixed Connect the left side of the transmission box, the center of the two sides of the bearing seat is connected to the right end of the main shaft through the bearing sliding, the right end of the main shaft passes through the bearing seat and extends into the transmission box, the right end of the main shaft is located in the transmission box and is connected to the output end of the drive motor through the V-belt, the drive motor is fixedly connected to the top of the bearing seat, and the main shaft is driven to rotate through the V-belt, thereby driving the grinding rotor to rotate. The material enters from the left side, and the speed of the material in the cylinder gradually decreases from the inside of the cylinder to the main shaft direction. When the material reaches the position of the filter device, the particle size distribution of the material decreases from the inside of the cylinder to the main shaft direction, and the material with a smaller particle size can easily flow out.Large-size particles are not easy to flow out. The grinding rotor is located inside the cylinder. The cylinder consists of an outer cylinder and an inner cylinder. The outer cylinder is fixedly connected to the left side of the top surface of the frame and is a cylindrical barrel. The inner wall of the outer cylinder is evenly distributed with multiple ribs to enhance the organizational structure and heat dissipation. The left end of the outer cylinder is fixedly connected to a cylinder cover by bolts. The cylinder cover is disc-shaped and is used to clean the inside of the cylinder and inspect the grinding rotor. A feed port is fixedly connected to the left top surface of the cylinder cover. The feed port is connected to the discharge port and the inside of the cylinder through a feed pump, which is used to transport the ground raw materials to the inside of the sand mill cylinder for grinding. An electric contact pressure gauge is provided at the corner of the feed port to sense and monitor the internal pressure of the sand mill. A sewage outlet is provided on the left bottom surface of the cylinder cover to clean the inside of the cylinder. , discharge grinding waste, the inner cylinder is fixed to the inside of the outer cylinder by an interference fit, is used to contact the grinding media and grinding raw materials, and is convenient for repair and replacement, the left end of the main shaft is placed inside the inner cylinder, and the right end of the outer cylinder is fixedly connected with a discharge flange, a circular through hole is provided in the center of the discharge flange, a discharge static ring is fixedly connected inside the through hole, the discharge static ring cooperates with the discharge dynamic ring connected to the main shaft by a key chain, when the equipment is running, when the main shaft reaches the set speed, a non-contact seal is formed between the discharge static ring and the discharge dynamic ring, and the material can only flow from the right to the left, when the equipment is stationary, the grinding medium will not flow out, and it is convenient to send the ground material to the bottom of the right discharge port, and a mechanical seal is provided between the grinding barrel and the opposite side of the bearing seat to prevent grinding The liquid and material powder enter the bearing seat, affecting the rotation of the main shaft. The main shaft is located at a section of the inner cylinder and is keyed to a grinding rotor, a screen, a discharge turbine 1 and a discharge turbine 2, which are used to grind and screen the materials, and discharge the ground materials from the discharge static ring and the discharge dynamic ring. The discharge turbine 1 and the discharge turbine 2 are disc-shaped, and the screen is fixed at the inner ring between the discharge turbine 1 and the discharge turbine 2. The discharge turbine 1 and the discharge turbine 2 are fixed together by locating pins. The discharge turbine 2 is located on the right side of the discharge turbine 1. The discharge turbine 1 and the discharge turbine 2 are driven by a flat key to the main shaft. The outer rings of the sides of the discharge turbine 1 and the discharge turbine 2 are provided with blades, and through holes are provided between the blades. The materials enter from the through holes on the side of the discharge turbine 1 and are centrifuged. The force throws the material to the screen for screening. The material that cannot pass through the screen is discharged from the side through hole of the second discharge turbine. Since the screen does not contact the grinding medium, the wear of the screen is reduced. There are four through holes evenly distributed on the side inner ring of the second discharge turbine, so that the material that passes through the screen enters from the second discharge turbine and is discharged through the side through holes corresponding to the discharge dynamic ring. The left end of the main shaft is keyed with multiple grinding rotors, which are separated by shaft sleeves. The top of the left end of the main shaft is fixedly connected with a rotor gland by threads to fix the grinding rotor. The grinding rotor is driven by the main shaft to drive the grinding medium to rotate, thereby grinding the material. The discharge port is set at the right end of the grinding barrel, which is used to connect the feed port of the feed pump, so that the material is circulated and ground in the grinding barrel. ,

[0006] As a further solution of the present invention: the heat exchange liquid interface on the outer cylinder is used to connect a circulating water pump to prevent the large amount of heat generated by the friction between the material, grinding media and grinding rotor in the cylinder from affecting the product quality, and to prevent the condensation of the slurry fed into the cylinder and the reduction of fluidity from affecting the grinding efficiency.

[0007] As a further solution of the present invention: an annular groove is provided on the right side surface of the cylinder cover for fixing the inner cylinder body.

[0008] As a further solution of the present invention: a shock absorbing device is provided between the driving motor and the bearing seat to reduce mechanical fatigue caused by the vibration of the driving motor and extend the service life of the equipment.

[0009] Compared with the prior art, the invention has the following beneficial effects: the grinding efficiency is increased, because the discharging device is close to the main shaft, when the equipment is running, the particles with larger particle size are close to the inside of the cylinder and cannot flow out, and can only flow out when they reach a certain fineness, and the energy utilization rate is high, while the original discharging device is on the cylinder, large particles are easy to flow out, but fine particles are not easy to flow out, the energy utilization rate is low, and the service life of the screen is long, because the screen is fixed inside the turbine, the screen does not contact with the grinding medium, and there is no wear

[0010] The mechanical seal has a long service life. There is a non-contact seal in front of the mechanical seal. The grinding medium does not come into contact with the mechanical seal. The product consistency is good. Only materials reaching a certain particle size can flow out. Therefore, the product consistency is better and the product quality is stable. It is environmentally friendly because the equipment basically has no wearing parts. Therefore, the equipment is basically not disassembled and generally no waste water is produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of a sand mill with high efficiency and stable performance;

[0012] Figure 2 This is a schematic diagram of the structure of the screen in the high-efficiency and stable performance sand mill;

[0013] Figure 3 This is a schematic diagram of the structure of the discharge turbine 1 in the high-efficiency and stable performance sand mill;

[0014] Figure 4 This is a schematic diagram of the structure of the discharge turbine 2 in the high-efficiency and stable performance sand mill;

[0015] Figure 5 This is a schematic diagram of the structure of the discharging moving ring in the high-efficiency and stable performance sand mill;

[0016] Figure 6 This is a schematic diagram of the structure of the discharge static ring in a high-efficiency and stable performance sand mill.

[0017] In the figure: foot 1, frame 2, drain outlet 3, cylinder head 4, feed port 5, grinding rotor 6, electric contact pressure gauge 7, outer cylinder 8, inner cylinder 9, rotor gland 10, sleeve 11, main shaft 12, screen 13, discharge turbine 1 14, discharge turbine 2 15, discharge dynamic ring 16, discharge static ring 17, discharge flange 18, discharge port 19, mechanical seal 20, bearing seat 21, drive motor 22. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 6In the embodiment of the present invention, a high-efficiency and stable performance sand mill includes a foot 1, a frame 2, a drain port 3, a cylinder head 4, a feed port 5, a grinding rotor 6, an electric contact pressure gauge 7, an outer cylinder 8, an inner cylinder 9, a rotor gland 10, a sleeve 11, a main shaft 12, a screen 13, a discharge turbine 14, a discharge turbine 2 15, a discharge dynamic ring 16, a discharge static ring 17, a discharge flange 18, a discharge port 19, a mechanical seal 20, a bearing seat 21 and a driving motor 22. The frame 2 is the main support of the sand mill. The bottom surface of the frame 2 is fixedly connected with six foot pins 1. The foot pins 1 are bolted and fixedly connected to the bolt seat set on the bottom surface of the frame 2 for supporting and grinding the machine, and the balance of the frame 2 can be adjusted by rotating the bolts. The right end of the top surface of the frame 2 is fixedly connected with a shaft The bearing seat 21 and the transmission box, the right side of the bearing seat 21 is fixedly connected to the left side of the transmission box, the centers of the two side surfaces of the bearing seat 21 are slidably connected to the right end of the main shaft 12 through bearings, and the right end of the main shaft 12 passes through the bearing seat 21 and extends into the transmission box. The right end of the main shaft 12 is located in the transmission box and is connected to a V-belt pulley through the output end of the V-belt and the drive motor 22. The drive motor 22 is fixedly connected to the top of the bearing seat 21, and the main shaft 12 is driven to rotate through the V-belt, thereby driving the grinding rotor 6 to rotate. The material enters from the left side, and the speed of the material in the cylinder gradually decreases from the inside of the cylinder to the direction of the main shaft 12. When the material reaches the position of the filtering device, the particle size distribution of the material decreases from the direction from the inside of the cylinder to the direction of the main shaft, and the particle size distribution decreases from large to small. The material with a small particle size is very It is easy to flow out, while large-size particles are not easy to flow out. The grinding rotor 6 is located inside the cylinder, which is composed of an outer cylinder 8 and an inner cylinder 9. The outer cylinder 8 is fixedly connected to the left side of the top surface of the frame 2 and is a cylindrical barrel. The inner wall of the outer cylinder 8 is evenly distributed with multiple ribs for enhancing the organizational structure and heat dissipation. The left end of the outer cylinder 8 is fixedly connected to the cylinder cover 4 by bolts. The cylinder cover 4 is disc-shaped and is used to clean the inside of the cylinder and overhaul the grinding rotor 6. The left top surface of the cylinder cover 4 is fixedly connected to a feed port 5. The feed port 5 is connected to the discharge port and the inside of the cylinder through a feed pump, which is used to transport the ground raw materials to the inside of the sand mill cylinder for grinding. An electric contact pressure gauge 7 is provided at the corner of the feed port 5 for sensing and monitoring the internal pressure of the sand mill. A sewage discharge port is provided on the left bottom surface of the cylinder cover 4. Port 3 is used to clean the inside of the cylinder and discharge the grinding waste. The inner cylinder 9 is fixed to the inside of the outer cylinder 8 by an interference fit, which is used to contact the grinding medium and the grinding raw material, and is convenient for repair and replacement. The left end of the main shaft 12 is placed inside the inner cylinder 9, and the right end of the outer cylinder 8 is fixedly connected with a discharge flange 18. A circular through hole is provided in the center of the discharge flange 18, and a discharge static ring 17 is fixedly connected inside the through hole. The discharge static ring 17 cooperates with the discharge dynamic ring 16 connected to the main shaft 12 by a key. When the equipment is running, when the main shaft 12 reaches the set speed, a non-contact seal is formed between the discharge static ring 17 and the discharge dynamic ring 16, and the material can only flow from the right to the left. When the equipment is stationary, the grinding medium will not flow out, so it is convenient to send the ground material to the bottom of the right discharge port 19.A mechanical seal 20 is provided between the opposite sides of the grinding barrel and the bearing seat 21 to prevent grinding liquid and material powder from entering the bearing seat 21 and affecting the rotation of the main shaft 12. The main shaft 12 is located on a section of the inner cylinder 9 and is key-linked with a grinding rotor 6, a screen 13, a discharge turbine 14 and a discharge turbine 2 15 for grinding and screening materials, and discharging the ground materials from the discharge static ring 17 and the discharge dynamic ring 16. The discharge turbine 14 and the discharge turbine 2 15 are disc-shaped, and the screen 13 is fixed on the inner ring between the discharge turbine 14 and the discharge turbine 2 15. The discharge turbine 14 and the discharge turbine 2 15 are fixed together by locating pins. The discharge turbine 2 15 is located on the right side of the discharge turbine 14. The discharge turbine 14 and the discharge turbine 2 15 are driven by a flat key with the main shaft 12. The outer rings of the sides of the discharge turbine 14 and the discharge turbine 2 15 are provided with blades, and through holes are provided between the blades. The material enters from the side through hole of the discharge turbine 14, and is thrown to the screen 13 for screening by centrifugal force. The material that cannot pass through the screen 13 is discharged from the side through hole of the discharge turbine 2 15. Since the screen 13 does not contact the grinding medium, the wear of the screen 13 is reduced. The side inner ring of the discharge turbine 2 15 is evenly distributed with four through holes, so that the material passing through the screen 13 enters from the discharge turbine 2 15 and is discharged through the side through holes corresponding to the discharge moving ring 16. A plurality of grinding rotors 6 are keyed to the left end of the main shaft 12, and the grinding rotors 6 are separated by shaft sleeves 11. The top of the left end of the main shaft 12 is fixedly connected with a rotor pressure cover 10 by threads, which is used to fix the grinding rotor 6. The grinding rotor 6 is driven by the main shaft 12 to drive the grinding medium to rotate, thereby grinding the material. The discharge port 19 is set at the right end of the grinding barrel, which is used to connect the feed port of the feed pump, so that the material is circulated and ground in the grinding barrel.

[0020] Preferably, the heat exchange liquid interface on the outer cylinder 8 is used to connect a circulating water pump to prevent the large amount of heat generated by the friction between the material, grinding media and grinding rotor in the cylinder from affecting the product quality, and to prevent the condensation of the slurry fed into the cylinder from reducing its fluidity and affecting the grinding efficiency.

[0021] Preferably, an annular groove is provided on the right side surface of the cylinder cover 4 for fixing the inner cylinder body 9.

[0022] Preferably, a shock absorbing device is provided between the driving motor 22 and the bearing seat 21 to reduce mechanical fatigue caused by the vibration of the driving motor 22 and extend the service life of the equipment.

[0023] The working principle of the present invention is: first start the driving motor, when the driving motor reaches a certain speed, start the feed pump, the feed port of the feed pump is connected to the right discharge port, so that the internal pressure of the grinding barrel is controlled within a certain range, to avoid excessive internal pressure of the grinding barrel to increase the equipment load, reduce energy consumption, the driving motor 22 is fixedly connected to the top of the bearing seat 21, and drives the main shaft 12 to rotate through the V-belt, thereby driving the grinding rotor 6 to rotate, the material enters from the left side, the speed of the material inside the cylinder from the inside of the cylinder to the main shaft 12 direction, the speed gradually decreases, when the material reaches the position of the filtering device, the material particle size changes from the inside of the cylinder to the main shaft direction, the particle size distribution decreases from large to small, the material with a small particle size is easy to flow out, and the large particle size is not easy to flow out, when the equipment is running, when the main shaft 12 reaches the set speed, a non-contact seal is formed between the discharge static ring 17 and the discharge dynamic ring 16, the material can only flow from the right to the left, when the equipment is stationary, the grinding medium will not flow out, it is convenient to send the ground material to the bottom of the right discharge port 19 for cyclic grinding.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-efficiency and stable performance sand mill, including a foot, a frame, a drain port, a cylinder cover, a feed port, a grinding rotor, an electric contact pressure gauge, an outer cylinder, an inner cylinder, a rotor gland, a sleeve, a main shaft, a screen, a discharge turbine 1, a discharge turbine 2, a discharge dynamic ring, a discharge static ring, a discharge flange, a discharge port, a mechanical seal, a bearing seat and a drive motor, characterized in that: The frame is the main support of the sand mill. The bottom surface of the frame is fixedly connected with six footings. The footings are bolted and fixedly connected to the bolt seats arranged on the bottom surface of the frame. The right end of the top surface of the frame is fixedly connected with the bearing seat and the transmission box. The right side of the bearing seat is fixedly connected to the left side of the transmission box. The centers of the two side surfaces of the bearing seat are slidably connected to the right end of the main shaft through bearings. The right end of the main shaft passes through the bearing seat and extends into the transmission box. The right end of the main shaft is located in the transmission box. The key chain is connected with a V-belt pulley at the part of the right end of the main shaft located in the transmission box. The drive motor is fixedly connected to the output end of the bearing seat through the V-belt. The top end, the grinding rotor is located inside the cylinder, the cylinder is composed of an outer cylinder and an inner cylinder, the outer cylinder is fixedly connected to the left side of the top surface of the frame, and is a cylindrical barrel, and the inner wall of the outer cylinder is evenly distributed with multiple ribs, the left end of the outer cylinder is fixedly connected with a cylinder cover by bolts, the cylinder cover is disc-shaped, the left top surface of the cylinder cover is fixedly connected with a feed port, the feed port is connected to the discharge port and the inside of the cylinder through a feed pump, an electric contact pressure gauge is provided at the corner of the feed port, and a sewage outlet is provided on the left bottom surface of the cylinder cover, and the inner cylinder is fixed to the inside of the outer cylinder by an interference fit, The left end of the main shaft is placed inside the inner cylinder, and the right end of the outer cylinder is fixedly connected with a discharge flange. A circular through hole is provided in the center of the discharge flange, and a discharge static ring is fixedly connected inside the through hole. The discharge static ring cooperates with a discharge dynamic ring key-linked on the main shaft, and a mechanical seal is provided between the grinding barrel and the opposite side of the bearing seat. The main shaft is located on a section of the inner cylinder and is key-linked with a grinding rotor, a screen, a discharge turbine 1 and a discharge turbine 2. The discharge turbine 1 and the discharge turbine 2 are disc-shaped, and the screen is fixed at the inner ring between the discharge turbine 1 and the discharge turbine 2. The first and second discharge turbines are fixed together by positioning pins, the second discharge turbine is located on the right side of the first discharge turbine, the first discharge turbine and the second discharge turbine are driven by a flat key to the main shaft, the outer rings of the side surfaces of the first discharge turbine and the second discharge turbine are provided with blades, through holes are provided between the blades, and the inner ring of the side surface of the second discharge turbine is evenly distributed with four through holes, a plurality of grinding rotors are connected by a key on the left end of the main shaft, the grinding rotors are separated by shaft sleeves, the top of the left end of the main shaft is fixedly connected with a rotor gland by a thread, the grinding rotor is driven by the main shaft, and the discharge port is arranged at the right end of the grinding barrel; A heat exchange liquid interface on the outer cylinder; An annular groove is provided on the right side surface of the cylinder cover; A shock absorbing device is arranged between the driving motor and the bearing seat.

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