An upright dry powder feeding grinder

Abstract

This utility model discloses a vertical dry powder feeding and 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 main shaft pulley mounted on one end of the main shaft, a flange mounted on the side of the bearing seat away from the main shaft pulley, a reducer mounted on the top surface of one end of the frame, a first twin-screw drive device connected to one side of the reducer, and a twin-screw pump connected to the other side of the reducer, a feed hopper mounted on the top of the twin-screw pump, a conical twin-screw pump mounted on the top of the flange, a feed observation hopper mounted on the top of the conical twin-screw pump, and a second twin-screw drive device mounted on the top of the feed observation hopper. This utility model avoids clogging during the conveying and grinding of dry powder materials, solving the problem of low grinding efficiency and high grinding costs caused by the frequent need for manual unclogging in traditional dry powder grinding equipment using vertical feeding channels.

Description

Technical Field

[0001] This utility model relates to the field of dry powder grinding machines, and in particular to a vertical dry powder feeding 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. Excessive feeding speed or feed volume can lead to blockage of the feed channel. Traditional dry powder grinding equipment generally uses a vertical feed channel for feeding. Vertical feed channels are often blocked due to excessive dry powder feed volume. At the same time, because dry powder has poor flowability in the grinding cylinder, it is easy to cause blockage in the feed channel and the feed inlet of the grinding cylinder. As a result, workers often need to clear blockages in the feed channel and feed inlet of the dry powder grinder, leading to low grinding efficiency, high labor intensity for workers, and high grinding costs for enterprises. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a vertical dry powder feeding and grinding machine.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The vertical dry powder feeding and grinding machine includes a frame, a bearing seat is installed at the top of one end of the frame, a main shaft is rotatably installed in the bearing seat, a main shaft pulley is installed at one end of the main shaft, a main motor is installed in the frame, a motor pulley is installed at 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 the side of the bearing seat away from the main shaft pulley. A reducer is installed on the top surface of one end of the frame. A first twin-screw drive device is driven to one side of the reducer, and a twin-screw pump for conveying dry powder is driven to the other side of the reducer. A hopper for holding dry powder is installed on the top of the twin-screw pump. A conical twin-screw pump for conveying dry powder is installed on the top of the flange. A discharge observation hopper is installed on the top of the conical twin-screw pump, and a second twin-screw drive device is installed on the top of the discharge observation hopper.

[0006] Preferably, the twin-screw pump is arranged horizontally, and the bottom of the hopper is connected to the top of the twin-screw pump, with the hopper supplying dry powder to the twin-screw pump.

[0007] Preferably, the feeding observation hopper is arranged longitudinally, and the end of the twin-screw pump away from the reducer is connected to the middle of the feeding observation hopper, and the twin-screw pump supplies dry powder to the feeding observation hopper.

[0008] Specifically, the conical twin-screw pump is arranged longitudinally, and the top of the conical twin-screw pump is connected to the bottom of the discharge observation hopper, which supplies dry powder to the conical twin-screw pump.

[0009] Specifically, the output end of the second twin-screw drive device passes through the feeding observation hopper and is connected to the conical twin-screw pump.

[0010] Specifically, the bottom of the conical twin-screw pump is connected to the top of the flange, and the conical twin-screw pump supplies dry powder to the flange.

[0011] Preferably, a first spiral powder feeding rotor for conveying dry powder is fixedly sleeved on the main shaft, and the first spiral powder feeding rotor is located inside the flange.

[0012] Preferably, a controller or control system is provided for signal control of components such as the main motor, the first twin-screw drive, and the second twin-screw drive. The controller is a PLC programmable logic controller, which can be a programmable logic controller of model XDS-40T-D, but is not limited thereto.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. By installing a reducer on the top surface of one end of the frame, a first twin-screw drive device is driven to one side of the reducer, and a twin-screw pump for conveying dry powder is driven to the other side of the reducer. A hopper for holding dry powder is installed on the top of the twin-screw pump. The first twin-screw drive device drives the twin-screw pump at a predetermined speed to convey the dry powder raw material from the hopper at a constant speed and quantity, avoiding the accumulation of dry powder raw material from the hopper in the twin-screw pump and causing blockage. This ensures smooth and efficient feeding of the twin-screw pump. It realizes automatic unblocking of the feeding channel, thus solving the problem that the traditional vertical feeding channel for dry powder grinding easily causes dry powder material to block the feeding channel, resulting in low feeding efficiency and requiring workers to waste time unblocking the feeding channel.

[0014] 2. By installing a conical twin-screw pump for conveying dry powder on the top of the flange, and a discharge observation hopper on the top of the conical twin-screw pump, and a second twin-screw drive device on the top of the discharge observation hopper, the discharge observation hopper allows workers to promptly detect whether the dry powder feed is blocked, preventing further deterioration of the dry powder feed blockage and damage to the grinding feed equipment caused by the dry powder feed blockage. When the second twin-screw drive device drives the conical twin-screw pump in the opposite direction, it can clear blockages in the dry powder raw material, preventing further accumulation of dry powder raw material in the conical twin-screw pump and causing more serious blockages. It realizes automatic clearing of the feed inlet of the grinding cylinder, eliminating the need for workers to waste time clearing or unblocking the feed inlet of the grinding cylinder, greatly improving the grinding efficiency of dry powder, and thus effectively solving the problems of low grinding efficiency, high labor intensity, and high grinding cost of traditional dry powder grinding equipment due to easy blockage at the feed inlet of the grinding cylinder. Attached Figure Description

[0015] For ease of explanation, the present invention will be described in detail below with reference to the preferred embodiments and accompanying drawings.

[0016] Figure 1 This is a structural schematic diagram of a vertical dry powder feeding and grinding machine according to the present invention.

[0017] Figure 2 This is a perspective view of the first or second spiral feeding rotor of a vertical dry powder feeding grinder according to the present invention.

[0018] Figure 3 This is a schematic diagram of the plate-type powder discharge screen of a vertical dry powder feeding and grinding machine according to the present invention.

[0019] Figure 4 This is a perspective view of the powder outlet front plate of a vertical dry powder feeding and grinding machine according to this utility model. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] Reference Figure 1 As shown, this utility model discloses a vertical dry powder feeding and grinding machine, including a frame 1. A bearing seat 2 is mounted on the top of one end of the frame 1. A main shaft 3 is rotatably mounted inside the bearing seat 2. A main shaft pulley 4 is mounted on one end of the main shaft 3. A main motor 5 is installed inside the frame 1. A motor pulley 6 is mounted on the output end of the main motor 5. The motor pulley 6 is connected to the main shaft pulley 4 via a belt 61. A flange 7 is mounted on the side of the bearing seat 2 away from the main shaft pulley 4. A reducer 8 is mounted on the top surface of one end. A first twin-screw drive device 9 is driven to one side of the reducer 8. A twin-screw pump 10 for conveying dry powder is driven to the other side of the reducer 8. A hopper 11 for holding dry powder is mounted on the top of the twin-screw pump 10. A conical twin-screw pump 12 for conveying dry powder is mounted on the top of the flange 7. A discharge observation hopper 13 is mounted on the top of the conical twin-screw pump 12. A second twin-screw drive device 14 is mounted on the top of the discharge observation hopper 13.

[0023] Reference Figure 1 As shown, the twin-screw pump 10 is arranged horizontally, and the bottom of the hopper 11 is connected to the top of the twin-screw pump 10. The hopper 11 supplies dry powder to the twin-screw pump 10.

[0024] By adopting the above technical solution, the first twin-screw drive device 9 drives the twin-screw pump 10 to work at a preset speed to deliver the dry powder material from the feed hopper 11 at a constant speed and in a fixed quantity. This avoids the accumulation of dry powder material from the feed hopper 11 in the twin-screw pump 10, which would cause blockage. The design of the twin-screw pump 10 ensures smooth and efficient feeding, thus solving the problem that traditional dry powder grinding often results in blockage of the feed channel due to excessive dry powder feed when using a vertical feed channel.

[0025] Reference Figure 1 As shown, the feeding observation hopper 13 is arranged longitudinally, and the end of the twin screw pump 10 away from the reducer 8 is connected to the middle of the feeding observation hopper 13. The twin screw pump 10 supplies dry powder to the feeding observation hopper 13.

[0026] By adopting the above technical solution, the design of the feeding observation hopper 13 makes it easy for staff to observe the conveying of dry powder inside, so as to detect whether the dry powder feeding is blocked in time, avoid further deterioration of the dry powder feeding blockage and damage to the grinding feeding equipment caused by the dry powder feeding blockage, and thus further avoid dry powder feeding blockage and extend the service life of the grinding feeding equipment.

[0027] Reference Figure 1As shown, the conical twin-screw pump 12 is arranged longitudinally, and the top of the conical twin-screw pump 12 is connected to the bottom of the discharge observation hopper 13. The discharge observation hopper 13 supplies dry powder to the conical twin-screw pump 12.

[0028] Reference Figure 1 As shown, the output end of the second twin-screw drive device 14 passes through the feeding observation hopper 13 and is connected to the conical twin-screw pump 12.

[0029] By adopting the above technical solution, the second twin-screw drive device 14 can drive the conical twin-screw pump 12 to work in both forward and reverse directions. When the conical twin-screw pump 12 becomes clogged, the first twin-screw drive device 9 stops driving the twin-screw pump 10 to convey dry powder raw materials, and the second twin-screw drive device 14 drives the conical twin-screw pump 12 to work in the reverse direction to clear the blockage of the dry powder raw materials. This avoids further accumulation of dry powder raw materials in the conical twin-screw pump 12, which would cause more serious blockage. It effectively solves the problem of blockage in the feeding of the conical twin-screw pump 12.

[0030] Reference Figure 1 As shown, the bottom of the conical twin-screw pump 12 is connected to the top of the flange 7, and the conical twin-screw pump 12 supplies dry powder to the flange 7.

[0031] Reference Figure 1 As shown, a first spiral powder feeding rotor 15 for conveying dry powder is fixedly sleeved on the main shaft 3, and the first spiral powder feeding rotor 15 is located inside the flange 7.

[0032] By adopting the above technical solution, the main motor 5 drives the main shaft 3 to rotate through the motor pulley 6, belt 61 and main shaft pulley 4, which in turn drives the first spiral powder feeding rotor 15 to rotate. The rotating first spiral powder feeding rotor 15 conveys the dry powder raw material sent to the flange 7 by the conical twin screw pump 10, avoiding the accumulation of dry powder raw material in the flange 7 and causing blockage, thus solving the problem that dry powder raw material is prone to blockage due to poor flowability.

[0033] Reference Figure 1As shown, a cooling cylinder 16 is installed on the side of the flange 7 away from the bearing seat 2. A grinding cylinder 17 is installed inside the cooling cylinder 16. A powder outlet front plate 18 for collecting the ground powder is installed on the side of the cooling cylinder 16 away from the flange 7. A first grinding turbine rotor 19, a second spiral powder feeding rotor 20, and a second grinding turbine rotor 21 are sequentially mounted on the other end of the main shaft 3 along the direction gradually away from the bearing seat 2. A powder outlet pin rotor 22 is installed on the end face of the same end of the main shaft 3. A plate-type powder outlet screen 23 is installed between the cooling cylinder 16 and the powder outlet front plate 18. At least one first grinding turbine rotor 19 is provided, at least one second grinding turbine rotor 21 is provided, and the second spiral powder feeding rotor 20 is located between the first grinding turbine rotor 19 and the second grinding turbine rotor 21. At least one second spiral powder feeding rotor 20 is provided. The first grinding turbine rotor 19, the second spiral powder feeding rotor 20, and the second grinding turbine rotor 21 are all located inside the grinding cylinder 17.

[0034] Reference Figure 2 As shown, the first spiral powder feeding rotor 15 includes a spiral shaft body 151, the spiral shaft body 151 is provided with a shaft hole 152 along the axial direction, and a spiral blade 153 is provided on the circumferential surface of the spiral shaft body 151; the structure of the second spiral powder feeding rotor 20 is the same as that of the first spiral powder feeding rotor 15.

[0035] Reference Figure 3 As shown, the plate-type powder discharge screen 23 includes an outer connecting ring 231, a central plate 232 inside the outer connecting ring 231, an inner connecting ring 233 between the outer connecting ring 231 and the central plate 232, a connecting plate 234 connected radially between the central plate 232 and the outer connecting ring 231, and the connecting plate 234 is connected to the inner connecting ring 233, an inner radial rib 235 is connected between the central plate 232 and the inner connecting ring 233, an inner screen hole 236 is provided between two adjacent inner radial ribs 235, an outer radial rib 237 is connected between the inner connecting ring 233 and the outer connecting ring 231, and an outer screen hole 238 is provided between two adjacent outer radial ribs 237.

[0036] Reference Figure 1 and Figure 4 As shown, the powder outlet front plate 18 has a collection hole 181 at its center, which is opposite to the plate-type powder outlet screen 23. The bottom of the powder outlet front plate 18 has a powder discharge hole 182, which is connected to the collection hole 181.

[0037] Reference Figure 1 As shown, the bottom of the cooling cylinder 16 is provided with at least four rollers 24, and the top surface of the other end of the frame 1 is provided with a track 25. The cooling cylinder 16 moves on the track 25 by means of at least four rollers 24, so as to facilitate the separation of the grinding cylinder 17 from the flange 7 for maintenance.

[0038] Reference Figures 1 to 4 As shown, when the vertical dry powder feeding and grinding mill is working, the dry powder raw material is fed through the feeding hopper 11. The first twin-screw drive device 9 drives the twin-screw pump 10 through the reducer 8 to transfer the dry powder raw material from the feeding hopper 11 to the feeding observation hopper 13. The conical twin-screw pump 12 realizes the supply of dry powder raw material from the feeding observation hopper 13 to the flange 7. The second twin-screw drive device 14 drives the conical twin-screw pump 12 in both the forward and reverse directions to clear blockages in the dry powder raw material, so as to ensure that the dry powder raw material can be smoothly and efficiently transferred from the feeding observation hopper 13 into the flange 7. The main motor 5 drives the main shaft 3 to rotate via the motor pulley 6, belt 61 and main shaft pulley 4, which in turn drives the first spiral powder feeding rotor 15, the first grinding turbine rotor 19, the second spiral powder feeding rotor 20, the second grinding turbine rotor 21 and the powder discharge rod pin rotor 22 to rotate. The first spiral powder feeding rotor 15 conveys the dry powder raw material through its spiral blades 153 on its circumference, avoiding the dry powder raw material from being blocked in the flange 7, so that the dry powder raw material can smoothly and efficiently enter the grinding cylinder 17 to prepare for the next step of grinding dry powder. The rotating first grinding turbine rotor 19 performs preliminary grinding on the dry powder raw material in the grinding cylinder 17. The rotating second spiral powder feeding rotor 20 conveys the pre-ground dry powder to prevent clogging in the grinding cylinder 17. The rotating second grinding turbine rotor 21 performs secondary grinding on the pre-ground dry powder to achieve the required fine particle size. The rotating powder discharge pin rotor 22 agitates the secondary-ground dry powder. The plate-type powder discharge screen 23 uses its inner screen holes 236 and outer screen holes 238 to respectively grind the powder. The dry powder after grinding is screened and filtered. Powder that does not reach the required fine particle size is filtered and left in the grinding cylinder 17 for further grinding. Powder that reaches the required fine particle size passes through the inner sieve holes 236 and outer sieve holes 238 of the plate-type powder discharge screen 23 and enters the collection hole 181 in the powder discharge front plate 18. Then, the qualified dry powder leaks out through the powder discharge hole 182 of the powder discharge front plate 18 for collection. This achieves automatic screening, filtering, and collection of the ground dry powder, ensuring good grinding quality and effect. Furthermore, by using stainless steel for the cooling cylinder 16 and silicon carbide for the grinding cylinder, it possesses the advantages of high hardness and excellent wear resistance. Its overall structural design not only prevents blockages during the conveying and grinding of dry powder materials, but also allows for real-time monitoring of the material feed through the feeding observation hopper 13, further preventing blockages. This significantly improves the conveying efficiency, grinding efficiency, and grinding quality of dry powder, while eliminating the need for manual clearing. This reduces the labor intensity of workers and the grinding cost of dry powder, effectively solving the problem of material blockages in the feeding channel and the feed inlet of the grinding cylinder that often occur in dry powder grinding equipment with vertical feeding channels, requiring manual clearing.

[0039] In this embodiment, both the first twin-screw drive device 9 and the second twin-screw drive device 14 are preferably configured as motors.

[0040] 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 vertical dry powder feeding and grinding mill, comprising a frame, a bearing seat mounted on the top of one end of the frame, a main shaft rotatably mounted inside the bearing seat, a main shaft pulley mounted on one end of the main shaft, a main motor mounted inside 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 the side of the bearing housing away from the main shaft pulley. A reducer is installed on the top surface of one end of the frame. A first twin-screw drive device is driven to one side of the reducer, and a twin-screw pump for conveying dry powder is driven to the other side of the reducer. A hopper for holding dry powder is installed on the top of the twin-screw pump. A conical twin-screw pump for conveying dry powder is installed on the top of the flange. A discharge observation hopper is installed on the top of the conical twin-screw pump, and a second twin-screw drive device is installed on the top of the discharge observation hopper.

2. The vertical dry powder feeding and grinding mill according to claim 1, characterized in that: The twin-screw pump is arranged horizontally, and the bottom of the hopper is connected to the top of the twin-screw pump. The hopper supplies dry powder to the twin-screw pump.

3. The vertical dry powder feeding and grinding mill according to claim 1, characterized in that: The feeding observation hopper is arranged longitudinally, and the end of the twin-screw pump away from the reducer is connected to the middle of the feeding observation hopper. The twin-screw pump supplies dry powder to the feeding observation hopper.

4. A vertical dry powder feeding and grinding mill according to claim 3, characterized in that: The conical twin-screw pump is arranged longitudinally, and the top of the conical twin-screw pump is connected to the bottom of the discharge observation hopper, which supplies dry powder to the conical twin-screw pump.

5. A vertical dry powder feeding and grinding mill according to claim 4, characterized in that: The output end of the second twin-screw drive device passes through the feeding observation hopper and is connected to the conical twin-screw pump.

6. A vertical dry powder feeding and grinding mill according to claim 5, characterized in that: The bottom of the conical twin-screw pump is connected to the top of the flange, and the conical twin-screw pump supplies dry powder to the flange.

7. A vertical dry powder feeding and grinding mill according to claim 1, characterized in that: The main shaft is fixedly fitted with a first spiral powder feeding rotor for conveying dry powder, and the first spiral powder feeding rotor is located inside the flange.

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