Metering screw feeder for superfine fly ash production

Abstract

The utility model discloses a kind of metering screw feeding devices of superfine fly ash production, including storage bin;The bottom end outlet of storage bin is connected with first screw feeder, and the lateral wall of first screw feeder is communicated with the bottom end of storage bin;The middle part of first screw feeder is provided with first discharge port, and first soft pipe is connected at first discharge port;The other end of first soft pipe is connected with slow-flow bin, and the bottom of slow-flow bin is provided with second discharge port, and second discharge port is connected with second soft pipe;Slow-flow bin is connected with weighing mechanism;The other end of second soft pipe is connected with second screw feeder, and the discharge port of second screw feeder is connected with discharge pipe;The controlled end of first screw feeder and second screw feeder is connected with PLC controller, and the output end of weighing mechanism is connected with PLC controller.The utility model has the advantages of improving the accuracy of measurement, the accuracy of feeding, keeping material uniform fluffy, and can also avoid the situation of material caking, uneven.

Description

Technical Field

[0001] This utility model relates to the field of fly ash production technology, and more specifically to a metering screw feeder for the production of ultrafine fly ash. Background Technology

[0002] Ultra-fine fly ash (UFFA) refers to fly ash with a particle size of less than 10 micrometers and a specific surface area of ​​more than 600 m² / kg (some can reach 1100 m² / kg). It has characteristics such as high activity and low water demand and is widely used in the building materials industry.

[0003] Screw feeders are commonly used in the production of ultrafine fly ash. A screw feeder is a machine that uses a motor to drive a screw to rotate and push materials to achieve the purpose of conveying. Although existing screw feeders can achieve continuous metering, the poor feeding stability and metering accuracy of much greater than 5% result in unstable metering and large fluctuations, which affect the quality of the finished product.

[0004] Therefore, there is an urgent need for a metering screw feeder for the production of ultrafine fly ash. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a metering screw feeder for the production of ultrafine fly ash, so as to solve the problems in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0007] A metering screw feeder for producing ultrafine fly ash includes a storage silo with a rectangular upper section and an isosceles trapezoidal lower section. The bottom outlet of the storage silo is connected to a horizontally positioned first screw feeder, and the bottom of the storage silo is connected to the side wall of the first screw feeder. The width of the bottom of the storage silo is the same as the length of the first screw feeder. A first discharge port is provided in the middle of the first screw feeder, and a first flexible connecting pipe is connected to the first discharge port. The other end of the first flexible connecting pipe is connected to a flow buffer, and a funnel-shaped second discharge port is provided at the bottom of the flow buffer, which is connected to a second flexible connecting pipe. The flow buffer is connected to a weighing mechanism, which is connected to a weighing frame mounted on the ground. The other end of the second flexible connecting pipe is connected to a second screw feeder, and the discharge port of the second screw feeder is connected to a discharge pipe. The controlled ends of both the first and second screw feeders are connected to a PLC controller, and the output end of the weighing mechanism is also connected to the PLC controller.

[0008] To further optimize the technical solution, the first screw feeder includes a first housing, with a first rotating shaft hinged inside the first housing; the end of the first rotating shaft extends out of the first housing and connects to a first motor, and two sets of symmetrically arranged auger blades are provided on the first rotating shaft, and the controlled end of the first motor is connected to a PLC controller.

[0009] To further optimize the technical solution, the width of the bottom outlet of the storage bin is greater than the radius of the first shell and less than the diameter of the first shell.

[0010] The technical solution is further optimized so that the volume of the slow-flow chamber is one-tenth to one-fifth of that of the storage chamber.

[0011] To further optimize the technical solution, the weighing mechanism includes lifting lugs connected to several slow-flow chambers, and the lifting lugs are connected to weighing sensors; the weighing sensors are connected to the weighing frame, and the output end of the weighing sensors is connected to the input end of the PLC controller.

[0012] To further optimize the technical solution, the second screw feeder includes a second housing that is connected to the second flexible pipe on the left side wall. A second rotating shaft is hinged inside the second housing and is axially arranged. The left end of the second rotating shaft extends out of the second housing and is connected to a second motor located outside the second housing. The controlled end of the second motor is connected to a PLC controller. An inclined chamber with a downward inclination of 15-30° is provided on the right end of the second housing, and the outlet of the inclined chamber is connected to a discharge pipe.

[0013] Due to the adoption of the above technical solutions, the technological progress achieved by this utility model is as follows.

[0014] This utility model provides a metering screw feeder for the production of ultrafine fly ash. By setting up a first screw feeder connected to a storage silo, it achieves the crushing of agglomerated materials. The symmetrically arranged auger blades increase the uniformity of material mixing. The crushed material is temporarily stored in a slow-flow silo, reducing silo pressure and keeping the material loose and uniform. An inclined silo is set up in the second screw feeder to prevent material accumulation and increase the stability of the material flow, thereby increasing metering accuracy. This utility model has the advantages of improving metering accuracy, feeding accuracy, and maintaining uniform and loose materials, while also preventing material agglomeration and unevenness. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a cross-sectional view of the first screw feeder in this utility model.

[0016] The components are: 1. Storage bin, 2. First screw feeder, 21. First housing, 22. First rotating shaft, 23. First motor, 3. Flow buffer, 4. Second screw feeder, 41. Second housing, 42. Second rotating shaft, 43. Second motor, 44. Inclined bin, 5. First flexible pipe, 6. Second flexible pipe, 7. Weighing sensor, 8. Lifting lug, 9. Weighing frame, 10. Discharge pipe. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] A metering screw feeder for the production of ultrafine fly ash, combined with Figures 1 to 3 As shown, the system includes a storage bin 1, a first screw feeder 2, a slow-flow bin 3, a second screw feeder 4, a first flexible connector 5, a second flexible connector 6, a weighing mechanism, and a discharge pipe 10. The first screw feeder 2 includes a first housing 21, a first rotating shaft 22, and a first motor 23; the second screw feeder 4 includes a second housing 41, a second rotating shaft 42, a second motor 43, and an inclined bin 44; the weighing mechanism includes a weighing sensor 7, a lifting lug 8, and a weighing frame 9.

[0019] The upper part of the storage silo 1 is rectangular, and the lower part is an isosceles trapezoid.

[0020] The bottom outlet of the storage bin 1 is connected to the horizontally arranged first screw feeder 2. The bottom of the storage bin 1 is connected to the side wall of the first screw feeder 2, and the bottom width of the storage bin 1 is the same as the length of the first screw feeder 2.

[0021] The first screw feeder 2 includes a first housing 21, with a first rotating shaft 22 hinged to its axial position within the housing 21. The end of the first rotating shaft 22 extends out of the housing 21 and is connected to a first motor 23, with the controlled end of the first motor 23 connected to a PLC controller. Two sets of symmetrically arranged auger blades are mounted on the first rotating shaft 22 to push material from both sides towards the center. The first screw feeder agitates the material and mixes the material in the storage bin in the middle, preventing coal powder from accumulating and agglomerating, thus preventing material from being fed out.

[0022] The width of the bottom outlet of the storage bin 1 is greater than the radius of the first shell and less than the diameter of the first shell 21, which ensures the conveying capacity of the first screw feeder and prevents it from running dry.

[0023] The first screw feeder 2 has a first discharge port in the middle, which is connected to a first flexible pipe 5, which is vertically positioned. The other end of the first flexible pipe 5 is connected to a flow buffer 3 located below, the volume of which is one-tenth to one-fifth of the storage silo 1. The first screw feeder 2 intermittently feeds the flow buffer 3, and the material is temporarily stored in the flow buffer 3, reducing the pressure in the flow buffer 3. Due to the small volume of the flow buffer 3, the powder in it can always remain in a loose and uniform state, thereby enabling the uniform conveying of the material in the next step.

[0024] The bottom of the slow-flow chamber 3 is provided with a funnel-shaped second discharge port, which is connected to the second flexible pipe 6. The other end of the second flexible pipe 6 is connected to the second screw feeder 4, and the discharge port of the second screw feeder 4 is connected to the discharge pipe 10.

[0025] The second screw feeder 4 includes a second housing 41 whose left sidewall is connected to the second flexible connecting pipe 6. A second rotating shaft 42, axially arranged, is hinged inside the second housing 41. The left end of the second rotating shaft 42 extends out of the second housing 41 and is connected to a second motor 43 located outside the second housing 41. The controlled end of the second motor is connected to a PLC controller. An inclined chamber 44, tilted downwards at 15-30°, is located at the right end of the second housing 41, and its outlet is connected to a discharge pipe 10. The inclined chamber 44 prevents material from accumulating at the end of the second screw feeder 4, preventing large clumps of material from falling and causing a sudden change in weight, thus affecting the accuracy of weighing.

[0026] The slow-flow chamber 3 is connected to the weighing mechanism, and the weighing mechanism is connected to the weighing frame 9 set on the ground. The weighing mechanism includes a lifting lug 8 connected to several slow-flow chambers 3. The lifting lug 8 is connected to a load cell 7. The output end of the load cell is connected to the input end of the PLC controller, and the load cell 7 is connected to the weighing frame.

[0027] In practical use, the PLC controller starts the first and second motors. The first motor drives the first screw feeder. Material enters the first screw feeder from the storage bin, and then moves from both sides of the first screw feeder towards the center as the auger blades on the first shaft rotate. After entering the first flexible pipe from the first discharge port, it falls into the slow-flow bin. The weighing sensor connected to the slow-flow bin can weigh the entire bin and send the weighing data to the PLC controller to calculate the discharge amount. The material enters the second screw feeder from the second discharge port at the bottom of the slow-flow bin. The second screw feeder conveys the material to the right end and then enters the next process through the discharge pipe.

Claims

1. A metering screw feeder for producing ultrafine fly ash, characterized in that: The system includes a storage silo (1), the upper part of which is rectangular and the lower part is an isosceles trapezoid. The bottom outlet of the storage silo (1) is connected to a horizontally arranged first screw feeder (2), the bottom of which is connected to the side wall of the first screw feeder (2), and the bottom width of the storage silo (1) is the same as the length of the first screw feeder (2). A first discharge port is provided in the middle of the first screw feeder (2), and a first flexible pipe (5) is connected to the first discharge port. The other end of the first flexible pipe (5) is connected to a slow-flow chamber (3). The bottom of the slow-flow chamber (3) is provided with a second discharge port in the shape of a funnel, and the second discharge port is connected to the second flexible pipe (6); the slow-flow chamber (3) is connected to the weighing mechanism, and the weighing mechanism is connected to the weighing frame (9) set on the ground; the other end of the second flexible pipe (6) is connected to the second screw feeder (4), and the discharge port of the second screw feeder (4) is connected to the discharge pipe (10); the controlled ends of the first screw feeder (2) and the second screw feeder (4) are both connected to the PLC controller, and the output end of the weighing mechanism is connected to the PLC controller.

2. The metering screw feeder for producing ultrafine fly ash according to claim 1, characterized in that: The first screw feeder (2) includes a first housing (21), and a first rotating shaft (22) is hinged inside the first housing (21); the end of the first rotating shaft (22) extends out of the first housing (21) and is connected to a first motor (23); two sets of symmetrically arranged screw blades are provided on the first rotating shaft (22), and the controlled end of the first motor (23) is connected to a PLC controller.

3. The metering screw feeder for producing ultrafine fly ash according to claim 2, characterized in that: The bottom outlet width of the storage bin (1) is greater than the radius of the first shell and less than the diameter of the first shell (21).

4. The metering screw feeder for producing ultrafine fly ash according to claim 1, characterized in that: The volume of the slow-flow chamber (3) is one-tenth to one-fifth of that of the storage chamber (1).

5. A metering screw feeder for producing ultrafine fly ash according to claim 1, characterized in that: The weighing mechanism includes a lug (8) connected to several flow chambers (3), and the lug (8) is connected to a weighing sensor (7); the weighing sensor (7) is connected to the weighing frame, and the output end of the weighing sensor (7) is connected to the input end of the PLC controller.

6. The metering screw feeder for producing ultrafine fly ash according to claim 1, characterized in that: The second screw feeder (4) includes a second housing (41) whose left side wall is connected to the second flexible pipe (6). A second rotating shaft (42) is hinged inside the second housing (41) and is axially arranged. The left end of the second rotating shaft (42) extends out of the second housing (41) and is connected to a second motor (43) located outside the second housing (41). The controlled end of the second motor is connected to a PLC controller. An inclined chamber (44) with a downward inclination of 15-30° is provided at the right end of the second housing (41), and the outlet of the inclined chamber (44) is connected to the discharge pipe (10).

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