Grinding equipment for producing calcium carbonate powder

Abstract

The utility model discloses grinding equipment for producing calcium carbonate powder, which comprises a rack, a shell and a driving part which are arranged on the rack, and a grinding mechanism arranged in the shell, the grinding mechanism comprises a grinding disc, a grinding roller assembly and a rotating main shaft, the grinding disc is rotatably arranged in the shell, the rotating main shaft vertically penetrates through the grinding disc, and the grinding roller assembly is arranged in the shell. A star rack is fixed at the top end of the rotating main shaft, the grinding roller assembly is mounted on the star rack and extends into the grinding disc, a large gear ring is fixedly arranged at the bottom of the grinding disc, a sun gear is fixedly arranged on the rotating main shaft, a planet carrier is fixedly arranged in the shell, and a planet gear meshed with the sun gear and the large gear ring at the same time is arranged on the planet carrier. The grinding disc is driven to rotate reversely while the grinding roller assembly is driven to rotate through the driving piece, the relative movement speed between the grinding disc and the grinding roller assembly is increased, shearing, extruding and grinding effects on materials are more complex and stronger, distribution is more uniform, and the grinding efficiency and the product fineness are improved.

Description

Technical Field

[0001] This utility model relates to the field of calcium carbonate processing technology, specifically to a grinding device for producing calcium carbonate powder. Background Technology

[0002] Heavy calcium carbonate is an important food additive. It is made from natural carbonate minerals such as calcite, marble, and limestone. In the processing of calcium carbonate, especially when the raw materials are processed into powder, the raw materials need to be crushed and ground. First, the raw materials are crushed, and then they are transferred to grinding equipment for grinding. The grinding equipment plays an important role in the processing of calcium carbonate powder. However, whether it is the existing Raymond mill or the new vertical mill equipment on the market, the grinding efficiency and the stability and consistency of the quality of the ground products are relatively poor. Utility Model Content

[0003] The main objective of this invention is to overcome the deficiencies of the prior art and provide a grinding device for producing calcium carbonate powder.

[0004] To achieve the above objectives, this utility model proposes a grinding device for producing calcium carbonate powder, comprising a frame, a housing and a drive unit mounted on the frame, and a grinding mechanism disposed inside the housing. The drive unit is connected to the grinding mechanism. The housing is connected to a feed chute and a discharge port. The grinding mechanism includes a grinding disc, a grinding roller assembly, and a rotating spindle. The grinding disc is rotatably disposed within the housing. The rotating spindle passes vertically through the grinding disc. A perforated frame is fixed to the top of the rotating spindle. The grinding roller assembly is mounted on the perforated frame and extends into the interior of the grinding disc. A large gear ring is fixed to the bottom of the grinding disc. A central gear is fixed to the rotating spindle. A planetary carrier is fixed inside the housing. The planetary carrier is provided with planetary gears that mesh simultaneously with the central gear and the large gear ring. While driving several grinding roller assemblies to rotate synchronously, the central gear drives the grinding disc to rotate in the opposite direction through planetary gears, increasing the relative speed between the grinding disc and the grinding roller assembly. This makes the shearing, squeezing and grinding effects on the calcium carbonate particles more complex and intense, resulting in a more uniform distribution of calcium carbonate particles between the grinding disc and the grinding roller assembly. This improves grinding efficiency and product fineness while ensuring the stability and consistency of product quality.

[0005] To further optimize the technical solution, the grinding roller assembly includes a first roller and a second roller. The first roller corresponds to the inner bottom surface of the grinding disc, and the second roller corresponds to the inner sidewall of the grinding disc. The first roller performs roller pressing and grinding on the calcium carbonate particles on the inner bottom surface of the grinding disc, while the second roller performs roller pressing and grinding on the calcium carbonate particles on the inner wall surface of the grinding disc. This two-stage grinding effectively improves the grinding effect.

[0006] To further optimize the technical solution, the first roller includes a guide rod, a roller seat, and a first grinding roller. The guide rod is vertically and movably mounted on the plum blossom frame. The roller seat is fixedly connected to the bottom end of the guide rod. The first grinding roller is rotatably mounted on the roller seat. The roller surface of the first grinding roller abuts against the inner bottom surface of the grinding disc.

[0007] To further optimize the technical solution, the guide rod is equipped with a spring and an adjusting nut, the top end of the spring abuts against the bottom surface of the plum blossom frame, and the bottom end of the spring abuts against the top surface of the adjusting nut.

[0008] To further optimize the technical solution, the inner bottom surface of the grinding disc is provided with an annular groove, the first grinding roller extends into the edge of the annular groove, and the edge of the annular groove is chamfered.

[0009] To further optimize the technical solution, the second roller includes a swing arm and a second grinding roller. The top end of the swing arm is hinged to the plum blossom frame, and the second grinding roller is rotatably disposed at the bottom end of the swing arm. The second grinding roller abuts against the inner sidewall of the grinding disc.

[0010] To further optimize the technical solution, the roller seat is provided with an L-shaped scraper holder, and the bottom end of the L-shaped scraper holder is provided with a scraper, the scraper surface of which abuts against the inner bottom surface of the grinding disc.

[0011] To further optimize the technical solution, the rotating spindle has an internal ventilation channel. A rotary joint is located at the bottom of the rotating spindle, with its outlet connected to the ventilation channel. The inlet of the rotary joint is connected to an air-blowing device via an inlet pipe. Several air-blowing rods are mounted on the shaft of the rotating spindle within the grinding disc, all connected to the ventilation channel and blowing air upwards. The air blown out by the air-blowing device propels the calcium carbonate powder upwards towards the discharge port.

[0012] To further optimize the technical solution, a powder separator is installed above the grinding mechanism, and the outlet end of the powder separator is connected to the discharge port. The powder separator classifies the calcium carbonate powder, and qualified calcium carbonate powder is discharged from the discharge port, while unqualified particles fall back into the grinding mechanism below for further grinding.

[0013] To further optimize the technical solution, the feed end of the feed chute is connected to a feeder. The feeder provides uniform feeding, preventing excessive fluctuations in feeding that could negatively impact the grinding effect.

[0014] The beneficial effects of this utility model include: the driving component drives several grinding roller assemblies mounted on the plum blossom frame to rotate synchronously. During the rotation of the grinding roller assemblies, the calcium carbonate particles that have entered the grinding disc are ground. At the same time, the planetary gear transmission drives the grinding disc to rotate in the opposite direction, so that the grinding roller assemblies and the grinding disc rotate synchronously and in opposite directions. This increases the relative speed between the grinding disc and the grinding roller assemblies, making the shearing, squeezing and grinding effects on the calcium carbonate particles more complex and intense. The distribution of calcium carbonate particles between the grinding disc and the grinding roller assemblies is more uniform, improving grinding efficiency and product fineness while ensuring the stability and consistency of product quality. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of the grinding equipment used to produce calcium carbonate powder in an embodiment of this utility model.

[0016] Figure 2 This is a schematic diagram of the shell after being cut in an embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the bottom of the grinding mechanism in an embodiment of this utility model.

[0018] Figure 4 This is a schematic diagram of the grinding mechanism in an embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram of the installation of the first roller and the second roller in an embodiment of this utility model.

[0020] Reference numerals: 1. Frame; 2. Housing; 201. Feed chute; 202. Discharge port; 203. Positioning groove; 3. Drive component; 4. Grinding mechanism; 401. Grinding disc; 4011. Annular groove; 4012. Snap ring; 402. Grinding roller assembly; 4021. First roller; 4022. Second roller; 4023. Guide rod; 4024. Roller seat; 4025. First grinding roller; 4026. Spring; 4027. Adjusting nut; 4028. Swing rod; 4029. Second grinding roller; 403. Rotary spindle; 404. Plum blossom frame; 405. Large gear ring; 406. Central gear; 407. Planetary carrier; 408. Planetary gear; 409. L-shaped shovel holder; 4010. Shovel; 5. Rotary joint; 6. Air inlet pipe; 7. Air blowing device; 8. Air jet bar; 9. Powder separator; 10. Feeder. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of the embodiments of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Please see Figures 1 to 5One embodiment of the disclosed grinding equipment for producing calcium carbonate powder includes a frame 1, a housing 2 mounted on the frame 1, a drive unit 3, and a grinding mechanism 4 disposed inside the housing 2. The drive unit 3 is a motor, which is connected to the grinding mechanism 4 via a belt drive to drive the grinding mechanism 4 to rotate. A feed chute 201 and a discharge port 202 are respectively connected to the housing 2. The grinding mechanism 4 includes a grinding disc 401, a grinding roller assembly 402, and a rotating spindle 403. The grinding disc 401 is rotatably disposed inside the housing 2, and the rotating spindle 403 passes vertically through the grinding disc 401. A perforated frame 404 is fixed at one end. Grinding roller assemblies 402 are evenly spaced and mounted around the perforated frame 404 and extend into the interior of the grinding disc 401. The grinding disc 401 has a concave disc structure. The grinding roller assemblies 402 extend into the interior of the grinding disc 401 and cooperate with the inner bottom surface and side wall of the grinding disc 401 to grind the calcium carbonate product. A large gear ring 405 is fixed at the bottom of the grinding disc 401. A central gear 406 is fixed on the rotating spindle 403. A planetary carrier 407 is fixed inside the housing 2. A planetary gear 408 is provided on the planetary carrier 407, which meshes with both the central gear 406 and the large gear ring 405. Specifically, the housing 2 and the grinding disc 401 are coaxially arranged. A positioning groove 203 is provided on the inner side wall of the housing 2, and a retaining ring 4012 that cooperates with the positioning groove 203 is provided on the outer periphery of the grinding disc 401. The retaining ring 4012 is engaged in the positioning groove 203 to prevent the grinding disc 401 from moving up and down. In this embodiment, the driving component 3 drives the rotating spindle 403 to rotate, and several grinding roller assemblies 402 mounted on the flower frame 404 rotate synchronously. During the rotation of the grinding roller assemblies 402, the calcium carbonate particles that have entered the grinding disc 401 are ground. At the same time, the central gear 406 drives the grinding disc 401 to rotate in the opposite direction through planetary gear transmission, increasing the relative speed between the grinding disc 401 and the grinding roller assembly 402. This makes the shearing, squeezing and grinding effects on the calcium carbonate particles more complex and intense, and the distribution of calcium carbonate particles between the grinding disc 401 and the grinding roller assembly 402 more uniform. This improves the grinding efficiency and the fineness of the product while ensuring the stability and consistency of product quality.

[0026] In a preferred embodiment, the grinding roller assembly 402 includes a first roller 4021 and a second roller 4022. The first roller 4021 corresponds to the inner bottom surface of the grinding disk 401, and the second roller 4022 corresponds to the inner sidewall of the grinding disk 401. The first roller 4021 performs roller pressing and grinding on the calcium carbonate particles falling onto the inner bottom surface of the grinding disk 401, and the second roller 4022 performs roller pressing and grinding on the calcium carbonate particles falling onto the inner wall surface of the grinding disk 401. Through two-stage grinding, the grinding effect can be effectively improved.

[0027] In a specific example, the first roller 4021 includes a guide rod 4023, a roller seat 4024, and a first grinding roller 4025. The guide rod 4023 is vertically and movably mounted on the perforated frame 404. The roller seat 4024 is fixedly connected to the bottom end of the guide rod 4023. The first grinding roller 4025 is rotatably mounted on the roller seat 4024, and the roller surface of the first grinding roller 4025 abuts against the inner bottom surface of the grinding disc 401. A spring 4026 and an adjusting nut 4027 are respectively provided on the guide rod 4023. The top end of the spring 4026 abuts against the bottom surface of the perforated frame 404, and the bottom end of the spring 4026 abuts against the adjusting nut 4027. The top surface of 7 abuts against the guide rod 4023, which has a threaded section (not shown) that mates with the adjusting nut 4027. By rotating the adjusting nut 4027, the compression of the spring 4026 is adjusted by moving the spring 4026 up and down along the guide rod 4023. When the adjusting nut 4027 moves upward along the guide rod 4023 to compress the spring 4026, the spring 4026 pushes the guide rod 4023 (first grinding roller 4025) downward to abut against the inner bottom surface of the grinding disc 401, increasing the squeezing force between the first grinding roller 4025 and the grinding disc 401, so that the material can be crushed and ground more effectively, improving grinding efficiency and product fineness.

[0028] In a preferred embodiment, an annular groove 4011 is provided on the inner bottom surface of the grinding disc 401, and the first grinding roller 4025 extends into the edge of the annular groove 4011. The edge of the annular groove 4011 is chamfered. When the calcium carbonate particles to be ground enter the annular groove 4011 of the grinding disc 401, during the rotation of the grinding disc 401, the calcium carbonate particles are thrown towards the edge of the annular groove 4011 under centrifugal force and are rolled and ground by the first grinding roller 4025. The chamfered edge of the annular groove 4011 facilitates the ejection of the calcium carbonate particles after being rolled and ground by the first grinding roller 4025 from the annular groove 4011 and into the inner wall area of ​​the grinding disc 401.

[0029] In a specific example, the second roller 4022 includes a rocker arm 4028 and a second grinding roller 4029. The top end of the rocker arm 4028 is hinged to the perforated frame 404, and the second grinding roller 4029 is rotatably mounted on the bottom end of the rocker arm 4028. The second grinding roller 4029 abuts against the inner wall of the grinding disc 401. During rotation, the rocker arm 4028 and the second grinding roller 4029 unfold outward under centrifugal force. The second grinding roller 4029 presses against the inner wall of the grinding disc 401 and rotates, performing secondary grinding on the calcium carbonate particles on the side wall of the grinding disc 401, further improving the fineness of the ground product.

[0030] In a preferred embodiment, an L-shaped scraper holder 409 is provided on the rear part of the roller seat 4024 in the rotation direction. One end of the L-shaped scraper holder 409 is fixed to the roller seat 4024, and a scraper 4010 is provided at the bottom end of the L-shaped scraper holder 409. The scraper surface of the scraper 4010 abuts against the inner bottom surface of the grinding disc 401. Specifically, the scraper surface of the scraper 4010 is located behind the first grinding roller 4025 and extends to the bottom surface outside the annular groove 4011. The scraper 4010 is rotated at a certain angle towards the inner wall of the grinding disc 401. After the first grinding roller 4025 grinds the powder, the calcium carbonate powder is scraped up and thrown into the space between the second grinding roller 4029 and the inner wall of the grinding disc 401 under the combined action of centrifugal force and the scraper 4010, and is rolled and ground again by the second grinding roller 4029 to improve the grinding efficiency.

[0031] In a preferred embodiment, a ventilation channel (not shown) is provided inside the rotating spindle 403. A rotary joint 5 is provided at the bottom end of the rotating spindle 403. The air outlet of the rotary joint 5 is connected to the ventilation channel, and the air inlet of the rotary joint 5 is connected to the air blowing device 7 through the air inlet pipe 6. The air blowing device 7 is a blower or an air compressor. Several air jet rods 8 are horizontally arranged on the shaft of the rotating spindle 403 located inside the grinding disc 401. The air jet rods 8 are all connected to the ventilation channel, and the air jet holes of the air jet rods 8 are opened upward so that the air blowing direction is upward. After the calcium carbonate powder is ground in the grinding disc 401, the air blown out by the air blowing device 7 is sprayed upward along the air inlet pipe 6, the rotary joint 5, and the air jet rods 8, which drives the calcium carbonate powder upward towards the discharge port 202, while the large calcium carbonate particles continue to remain in the grinding disc 40 for further grinding.

[0032] In a preferred embodiment, a powder separator 9 is provided above the grinding mechanism 4, and the outlet end of the powder separator 9 is connected to the discharge port 202. The powder separator 9 is a prior art device, and its specific structure will not be described in detail here. Calcium carbonate powder is blown upward into the powder separator 9, where it is classified. Qualified calcium carbonate powder is discharged from the discharge port 202, while unqualified particles fall back into the grinding mechanism 4 below for further grinding.

[0033] In a preferred embodiment, a feeder 10 is connected to the feed end of the feed chute 201. The feeder 10 is a prior art device, and its specific structure will not be described in detail here. By feeding the material evenly through the feeder 10, the calcium carbonate particles to be ground are evenly fed into the grinding mechanism 4, avoiding excessive fluctuations in feeding that could affect the grinding effect.

[0034] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A grinding apparatus for producing calcium carbonate powder, characterized in that: The device includes a frame, a housing and a drive unit mounted on the frame, and a grinding mechanism disposed inside the housing. The drive unit is connected to the grinding mechanism. The housing is connected to a feed chute and a discharge port. The grinding mechanism includes a grinding disc, a grinding roller assembly, and a rotating spindle. The grinding disc is rotatably disposed inside the housing. The rotating spindle passes vertically through the grinding disc. A perforated frame is fixed to the top of the rotating spindle. The grinding roller assembly is mounted on the perforated frame and extends into the interior of the grinding disc. A large gear ring is fixed to the bottom of the grinding disc. A central gear is fixed to the rotating spindle. A planetary carrier is fixed inside the housing. The planetary carrier has planetary gears that mesh with both the central gear and the large gear ring.

2. The grinding equipment for producing calcium carbonate powder as described in claim 1, characterized in that: The grinding roller assembly includes a first roller and a second roller, wherein the first roller corresponds to the inner bottom surface of the grinding disk and the second roller corresponds to the inner sidewall of the grinding disk.

3. The grinding equipment for producing calcium carbonate powder as described in claim 2, characterized in that: The first roller includes a guide rod, a roller seat, and a first grinding roller. The guide rod is vertically and movably mounted on the perforated frame. The roller seat is fixedly connected to the bottom end of the guide rod. The first grinding roller is rotatably mounted on the roller seat. The roller surface of the first grinding roller abuts against the inner bottom surface of the grinding disc.

4. The grinding equipment for producing calcium carbonate powder as described in claim 3, characterized in that: The guide rod is equipped with a spring and an adjusting nut. The top end of the spring abuts against the bottom surface of the plum blossom frame, and the bottom end of the spring abuts against the top surface of the adjusting nut.

5. The grinding equipment for producing calcium carbonate powder as described in claim 4, characterized in that: The inner bottom surface of the grinding disc is provided with an annular groove, and the first grinding roller extends into the edge of the annular groove, the edge of the annular groove being chamfered.

6. The grinding apparatus for producing calcium carbonate powder as described in any one of claims 3 to 5, characterized in that: The second roller includes a swing arm and a second grinding roller. The top end of the swing arm is hinged to the plum blossom frame, and the second grinding roller is rotatably disposed at the bottom end of the swing arm. The second grinding roller abuts against the inner sidewall of the grinding disc.

7. The grinding equipment for producing calcium carbonate powder as described in claim 6, characterized in that: The roller seat is provided with an L-shaped scraper holder, and the bottom end of the L-shaped scraper holder is provided with a scraper. The scraper surface of the scraper abuts against the inner bottom surface of the grinding disc.

8. The grinding equipment for producing calcium carbonate powder as described in claim 7, characterized in that: The rotating spindle has an internal ventilation channel. The bottom end of the rotating spindle is equipped with a rotary joint. The air outlet of the rotary joint is connected to the ventilation channel. The air inlet of the rotary joint is connected to the air blowing device through an air inlet pipe. The rotating spindle has several air jet rods on its shaft inside the grinding disc. All of the air jet rods are connected to the ventilation channel and blow air upwards.

9. The grinding equipment for producing calcium carbonate powder as described in claim 8, characterized in that: A powder separator is provided above the grinding mechanism, and the outlet end of the powder separator is connected to the discharge port.

10. The grinding equipment for producing calcium carbonate powder as described in claim 9, characterized in that: The feed chute is connected to a feeder at its feed end.

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