Anti-clogging dry powder grinder

Abstract

This utility model discloses an anti-clogging dry powder grinding mill, comprising a bearing seat located at the top of one end of the frame, a main shaft rotatably mounted within the bearing seat, a flange mounted on one side of the bearing seat, a cooling cylinder mounted on the side of the flange away from the bearing seat, a grinding cylinder mounted inside the cooling cylinder, a powder outlet front plate mounted on the side of the cooling cylinder away from the flange, a conical screw feed pump mounted at the bottom of the powder outlet front plate, and a conical screw drive device mounted on the conical screw feed pump. At the other end of the main shaft, a first spiral powder feeding rotor, a first grinding turbine rotor, a second spiral powder feeding rotor, and a second grinding turbine rotor are sequentially mounted along a direction gradually moving away from the bearing seat. The overall structural design of this utility model provides functions such as anti-clogging, coarse grinding, fine grinding, screening and filtration, and automatic discharge of qualified ground dry powder materials. It solves the problem of current dry powder grinding equipment where material accumulation in the grinding zone and poor flowability within the grinding cylinder cause material blockage, affecting grinding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of dry powder grinding machines, and in particular to an anti-clogging dry powder grinding machine. Background Technology

[0002] Grinding equipment refers to the fine grinding of materials so that they reach the required level of fineness. Traditional grinding equipment is wet grinding, in which a modifier is mixed into the material to make it into a fluid state before the material is fed into the grinding equipment for grinding. After grinding, the material needs to be dried. This type of grinding equipment has low production efficiency and high equipment cost.

[0003] Dry powder grinding is a powder processing technology widely used in cement, chemical, and metallurgical industries. It mainly uses mechanical force to crush materials to the target particle size. Dry powder grinding generally involves two processes: coarse grinding and fine grinding. The main causes of clogging in dry powder grinding include uneven feeding and excessive feeding speed. Excessive or uneven feeding speed will cause material to accumulate in the grinding zone, making it impossible for the feeder to continuously and evenly supply material. At the same time, because dry powder has poor flowability in the grinding cylinder, the material will gradually form a blockage if it stays in the feed inlet and grinding cylinder for too long. This will require time to clear or remove the blockage, which is time-consuming and labor-intensive. This also results in low grinding efficiency and low grinding capacity. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an anti-clogging dry powder grinding machine.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: The anti-clogging dry powder grinding mill includes a frame, a bearing seat is installed at the top of one end of the frame, a main shaft is rotatably mounted inside the bearing seat, a main shaft pulley is installed on one end of the main shaft, a main motor is installed inside the frame, a motor pulley is installed on the output end of the main motor, and the motor pulley is connected to the main shaft pulley via a belt. A flange is installed on one side of the bearing seat, and a cooling cylinder is installed on the side of the flange away from the bearing seat. A grinding cylinder is installed inside the cooling cylinder, and a side of the cooling cylinder away from the flange... A powder discharge front plate is mounted on the side for collecting the ground powder. A conical screw feed pump for discharging the ground powder is mounted at the bottom of the powder discharge front plate. A conical screw drive device is mounted on the conical screw feed pump for driving the conical screw feed pump to discharge the powder. A first spiral powder feeding rotor, a first grinding turbine rotor, a second spiral powder feeding rotor, and a second grinding turbine rotor are sequentially mounted on the other end of the main shaft along the direction gradually away from the bearing seat. A powder discharge pin rotor is mounted on the end face of the same end of the main shaft. A plate-type powder discharge screen is installed between the cooling cylinder and the powder discharge front plate.

[0006] Preferably, the first spiral powder feeding rotor is located inside the flange and is used to convey dry powder; the first spiral powder feeding rotor includes a spiral shaft body, the spiral shaft body is provided with a shaft hole in the axial direction, and spiral blades are provided on the circumferential surface of the spiral shaft body. The structure of the second spiral powder feeding rotor is the same as that of the first spiral powder feeding rotor.

[0007] Specifically, the top of the flange is provided with a powder inlet for receiving dry powder raw materials.

[0008] Preferably, at least one first grinding turbine rotor and at least one second grinding turbine rotor are provided, and a second spiral powder feeding rotor is located between the first grinding turbine rotor and the second grinding turbine rotor. At least one second spiral powder feeding rotor is provided, and the first grinding turbine rotor, the second spiral powder feeding rotor and the second grinding turbine rotor are all located inside the grinding cylinder.

[0009] Preferably, the plate-type powder discharge screen includes an outer connecting ring, a central plate inside the outer connecting ring, an inner connecting ring between the outer connecting ring and the central plate, a connecting plate connected radially between the central plate and the outer connecting ring, and the connecting plate is connected to the inner connecting ring, an inner radial rib is connected between the central plate and the inner connecting ring, an inner screen hole is provided between two adjacent inner radial ribs, an outer radial rib is connected between the inner connecting ring and the outer connecting ring, and an outer screen hole is provided between two adjacent outer radial ribs.

[0010] Preferably, the powder outlet front plate has a collection hole at its center, which is opposite to the plate-type powder outlet screen, and a powder discharge hole at the bottom of the powder outlet front plate, which is connected to the collection hole.

[0011] Specifically, the feed end of the conical screw feed pump is connected to the powder discharge hole of the powder discharge front plate, and a powder discharge port is installed on one side of the conical screw feed pump.

[0012] Preferably, the cooling cylinder is made of stainless steel, and the grinding cylinder is made of silicon carbide.

[0013] Preferably, the bottom of the cooling cylinder is provided with at least four rollers, and a track is provided on the top surface of the other end of the frame.

[0014] Preferably, a controller or control system is provided for signal control of components such as the main motor and the conical screw drive. The controller is a PLC programmable logic controller, and the PLC programmable logic controller can be a programmable logic controller of model XDS-40T-D, but is not limited thereto.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. By sequentially mounting a first spiral powder feeding rotor, a first grinding turbine rotor, a second spiral powder feeding rotor, and a second grinding turbine rotor on the other end of the main shaft in a direction gradually moving away from the bearing seat, and designing the structure of the first and second spiral powder feeding rotors, the rotating first and second spiral powder feeding rotors can respectively use the spiral blades on their circumferential surfaces to convey dry powder materials, thereby avoiding the phenomenon of dry powder materials accumulating and causing blockage. It achieves an anti-blocking function, avoiding the need to waste time clearing or removing blockages, thus greatly improving grinding efficiency and grinding capacity, and effectively solving the problem that current dry powder material grinding equipment suffers from material accumulation in the grinding zone and poor flowability in the grinding cylinder due to excessively fast or uneven feeding speed, which affects grinding efficiency and grinding effect.

[0016] 2. It features a powder outlet front plate installed on the side of the cooling cylinder away from the flange for collecting the ground powder, and a plate-type powder outlet screen installed between the cooling cylinder and the powder outlet front plate. The structure of the plate-type powder outlet screen and the powder outlet front plate are designed so that the dry powder after secondary grinding can be screened and filtered through the plate-type powder outlet screen. The dry powder that does not reach the fine particle size required for production will be filtered into the grinding cylinder for further grinding, while the dry powder that reaches the fine particle size required for production will be collected and discharged through the powder outlet front plate, so as to ensure that the grinding effect and grinding quality of the dry powder produced by it are good. Attached Figure Description

[0017] For ease of explanation, the present invention will be described in detail below with reference to the preferred embodiments and accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of an anti-clogging dry powder grinding machine according to the present invention.

[0019] Figure 2 This is a perspective view of the first or second spiral powder feeding rotor of an anti-clogging dry powder grinding machine according to the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of a plate-type powder discharge screen for an anti-clogging dry powder grinder according to the present invention.

[0021] Figure 4 This is a perspective view of the powder outlet front plate of an anti-clogging dry powder grinder according to the present invention. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0024] Reference Figure 1 As shown, this utility model discloses an anti-clogging dry powder grinder, comprising a frame 1, a bearing seat 2 mounted on the top of one end of the frame 1, a main shaft 3 rotatably mounted inside the bearing seat 2, a main shaft pulley 4 mounted on one end of the main shaft 3, a main motor 5 mounted inside the frame 1, a motor pulley 6 mounted on the output end of the main motor 5, and the motor pulley 6 being connected to the main shaft pulley 4 via a belt 7. A flange 8 is mounted on one side of the bearing seat 2, a cooling cylinder 9 is mounted on the side of the flange 8 away from the bearing seat 2, a grinding cylinder 10 is mounted inside the cooling cylinder 9, and a collection point for grinding is mounted on the side of the cooling cylinder 9 away from the flange 8. The powder discharge front plate 11 is equipped with a conical screw feed pump 12 for discharging the ground powder at the bottom of the powder discharge front plate 11. A conical screw drive device 13 for driving the conical screw feed pump 12 to discharge the powder is installed on the conical screw feed pump 12. At the other end of the main shaft 3, a first spiral powder feeding rotor 14, a first grinding turbine rotor 15, a second spiral powder feeding rotor 16 and a second grinding turbine rotor 17 are sequentially mounted along the direction gradually away from the bearing seat 2. A powder discharge pin rotor 18 is installed on the end face of the same end of the main shaft 3. A plate-type powder discharge screen 19 is installed between the cooling cylinder 9 and the powder discharge front plate 11.

[0025] In this embodiment, the conical screw drive device 13 is preferably configured as a motor.

[0026] Reference Figure 1 and Figure 2 As shown, the first spiral powder feeding rotor 14 is located inside the flange 8 and is used to convey dry powder; the first spiral powder feeding rotor 14 includes a spiral shaft body 141, the spiral shaft body 141 is provided with a shaft hole 142 along the axial direction, and a spiral blade 143 is provided on the circumferential surface of the spiral shaft body 141; the structure of the second spiral powder feeding rotor 16 is the same as the structure of the first spiral powder feeding rotor 14.

[0027] By adopting the above technical solution, the main motor 5 drives the main shaft 3 to rotate through the motor pulley 6, belt 7 and main shaft pulley 4, which in turn drives the first spiral powder feeding rotor 14 to rotate. The first spiral powder feeding rotor 14 conveys the dry powder raw material through the spiral blades 143 on its circumferential surface, avoiding the dry powder raw material from clogging in the flange 8. It achieves the function of anti-clogging, avoiding the need to waste time to clear or remove blockages, thus greatly improving the grinding efficiency. It also effectively solves the problem that the current dry powder material grinding equipment suffers from material accumulation in the grinding zone and poor flowability in the grinding cylinder due to excessively fast or uneven feeding speed, which affects the grinding efficiency and grinding effect.

[0028] Reference Figure 1 As shown, the top of the flange 8 is provided with a powder inlet 20 for receiving dry powder raw materials.

[0029] By adopting the above technical solution, the dry powder raw material enters the flange 8 through the powder inlet 20. The rotating first spiral powder feeding rotor 14 automatically conveys the dry powder raw material entering the flange 8 into the grinding cylinder 10 to prepare for the next step of grinding dry powder. This achieves high efficiency and good effect in conveying dry powder raw material, and avoids the accumulation of dry powder raw material in the flange 8, which would cause material blockage.

[0030] Reference Figure 1 As shown, at least one first grinding turbine rotor 15 is provided, at least one second grinding turbine rotor 17 is provided, and a second spiral powder feeding rotor 16 is located between the first grinding turbine rotor 15 and the second grinding turbine rotor 17. At least one second spiral powder feeding rotor 16 is provided, and the first grinding turbine rotor 15, the second spiral powder feeding rotor 16 and the second grinding turbine rotor 17 are all located inside the grinding cylinder 10.

[0031] By adopting the above technical solution, the rotating main shaft 3 drives the first grinding turbine rotor 15, the second spiral powder feeding rotor 16, and the second grinding turbine rotor 17 to rotate around it. The rotating first grinding turbine rotor 15 performs preliminary grinding on the dry powder raw material, and the second spiral powder feeding rotor 16 actively conveys the dry powder after the preliminary grinding, avoiding the accumulation and blockage of the dry powder in the grinding cylinder 10. The rotating second grinding turbine rotor 17 performs secondary grinding on the dry powder after the preliminary grinding to achieve the fine particles required for production.

[0032] Reference Figure 3As shown, the plate-type powder discharge screen 19 includes an outer connecting ring 191, a central plate 192 inside the outer connecting ring 191, an inner connecting ring 193 between the outer connecting ring 191 and the central plate 192, a connecting plate 194 radially connecting the central plate 192 and the outer connecting ring 191, and the connecting plate 194 is connected to the inner connecting ring 193, an inner radial rib 195 connecting the central plate 192 and the inner connecting ring 193, an inner screen hole 196 between two adjacent inner radial ribs 195, an outer radial rib 197 connecting the inner connecting ring 193 and the outer connecting ring 191, and an outer screen hole 198 between two adjacent outer radial ribs 197.

[0033] By adopting the above technical solution, when the main shaft 3 rotates, it drives the powder discharge rod rotor 18 to rotate around it. The rotating powder discharge rod rotor 18 agitates the dry powder after secondary grinding, so that the dry powder after secondary grinding passes through the inner screen hole 196 and the outer screen hole 198 of the plate-type powder discharge screen 19 for screening and filtration. The dry powder particles that do not reach the required fineness are filtered in the grinding cylinder 10 for further grinding, while the dry powder particles that reach the required fineness pass through the inner screen hole 196 and the outer screen hole 198 and enter the powder discharge front plate 11. This realizes automatic screening and filtration of the dry powder after secondary grinding, and has the advantages of high screening and filtration efficiency and good screening and filtration effect, so as to ensure the good grinding quality of the dry powder.

[0034] Reference Figure 4 As shown, the powder outlet front plate 11 has a collection hole 111 at its center, which is opposite to the plate-type powder outlet screen 19. The bottom of the powder outlet front plate 11 has a powder discharge hole 112, which is connected to the collection hole 111.

[0035] By adopting the above technical solution, the dry powder particles that have reached the required fineness after being filtered by the plate-type powder discharge screen 19 pass through the inner screen hole 196 and the outer screen hole 198 and enter the collection hole 111 in the powder discharge front end plate 11. The qualified dry powder leaks out through the powder discharge hole 112 for collection.

[0036] Reference Figure 1 and Figure 4 As shown, the feed end of the conical screw feed pump 12 is connected to the powder discharge hole 112 of the powder discharge front plate 11, and a powder discharge port 21 is installed on one side of the conical screw feed pump 12.

[0037] Reference Figure 1 As shown, the cooling cylinder 9 is made of stainless steel, and the grinding cylinder 10 is made of silicon carbide.

[0038] By adopting the above technical solutions, the cooling cylinder 9 is made of stainless steel, which achieves good rust prevention and corrosion resistance; the grinding cylinder 10 is made of silicon carbide, which achieves high hardness and excellent wear resistance, thereby extending the service life of the grinding cylinder 10.

[0039] Reference Figure 1 As shown, at least four rollers 22 are provided at the bottom of the cooling cylinder 9, and a track 23 is provided on the top surface of the other end of the frame 1.

[0040] By adopting the above technical solution, the cooling cylinder 9 can move on the track 23 via at least four rollers 22, which facilitates the separation of the grinding cylinder 10 from the flange 8 for maintenance, thus achieving the purpose of convenient, quick, time-saving, and labor-saving maintenance.

[0041] The above embodiments are merely examples of this utility model and are not intended to limit the implementation and scope of this utility model. All technical solutions that are the same as or equivalent to the contents described in the claims of this utility model should be included within the protection scope of this utility model.

Claims

1. A clog-resistant dry powder grinding mill, comprising a frame, a bearing seat mounted on the top of one end of the frame, a main shaft rotatably mounted within the bearing seat, a main shaft pulley mounted on one end of the main shaft, a main motor mounted within the frame, a motor pulley mounted on the output end of the main motor, and the motor pulley being connected to the main shaft pulley via a belt, characterized in that: A flange is installed on one side of the bearing housing. A cooling cylinder is installed on the side of the flange away from the bearing housing. A grinding cylinder is installed inside the cooling cylinder. A powder discharge front plate for collecting the ground powder is installed on the side of the cooling cylinder away from the flange. A conical screw feed pump for discharging the ground powder is installed at the bottom of the powder discharge front plate. A conical screw drive device for driving the conical screw feed pump to discharge the powder is installed on the conical screw feed pump. A first spiral powder feeding rotor, a first grinding turbine rotor, a second spiral powder feeding rotor, and a second grinding turbine rotor are sequentially mounted on the other end of the main shaft in a direction gradually away from the bearing housing. A powder discharge pin rotor is installed on the end face of the same end of the main shaft. A plate-type powder discharge screen is installed between the cooling cylinder and the powder discharge front plate.

2. A clog resistant dry powder mill according to claim 1, wherein: The first spiral powder feeding rotor is located inside the flange and is used to convey dry powder; the first spiral powder feeding rotor includes a spiral shaft body, the spiral shaft body is provided with a shaft hole along the axial direction, and spiral blades are provided on the circumferential surface of the spiral shaft body; The structure of the second spiral powder feeding rotor is the same as that of the first spiral powder feeding rotor.

3. A clog resistant dry powder mill according to claim 2, wherein: The top of the flange is provided with a powder inlet for receiving dry powder raw materials.

4. A clog resistant dry powder mill according to claim 1, wherein: At least one first grinding turbine rotor and at least one second grinding turbine rotor are provided. A second spiral powder feeding rotor is located between the first grinding turbine rotor and the second grinding turbine rotor. At least one second spiral powder feeding rotor is provided. The first grinding turbine rotor, the second spiral powder feeding rotor and the second grinding turbine rotor are all located inside the grinding cylinder.

5. The anti-clogging dry powder grinding mill according to claim 1, characterized in that: The plate-type powder discharge screen includes an outer connecting ring, a central plate inside the outer connecting ring, an inner connecting ring between the outer connecting ring and the central plate, a connecting plate connected radially between the central plate and the outer connecting ring, and the connecting plate connected to the inner connecting ring, inner radial ribs connected between the central plate and the inner connecting ring, inner screen holes between two adjacent inner radial ribs, outer radial ribs connected between the inner connecting ring and the outer connecting ring, and outer screen holes between two adjacent outer radial ribs.

6. A clog resistant dry powder mill according to claim 1, wherein: The powder outlet front plate has a collection hole at its center, which is opposite to the plate-type powder outlet screen. The bottom of the powder outlet front plate has a powder discharge hole, which is connected to the collection hole.

7. A choke-proof dry powder mill according to claim 6 wherein: The feed end of the conical screw feed pump is connected to the powder discharge hole of the powder discharge front plate, and a powder discharge port is installed on one side of the conical screw feed pump.

8. A clog resistant dry powder mill according to claim 1, wherein: The cooling cylinder is made of stainless steel, and the grinding cylinder is made of silicon carbide.

9. A clog resistant dry powder mill according to claim 1, wherein: The cooling cylinder is provided with at least four rollers at its bottom, and a track is provided on the top surface at the other end of the frame.

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