Dust removal device for solving problems of wall hanging and bin binding of materials for weighing bin

Abstract

The utility model discloses a dust removal device for solving the problems of wall hanging and bin binding of materials for a weighing bin, which comprises a dust collection pipeline, a dust removal pipe coaxially arranged in the dust collection pipeline, an annular sealing plate arranged between the outer wall of the dust removal pipe and the outer wall of the dust collection pipeline, a top plate arranged at the upper end of the dust removal pipe, an air outlet formed in the middle of the top plate and connected with an air outlet pipe, a filter screen drum is coaxially arranged in the dust removal pipe, the upper end of the filter screen drum is fixed to the bottom of the top plate, the filter screen drum is sleeved with a filter cloth bag, the upper end of the filter cloth bag is fixedly connected with the outer wall of the filter screen drum, a driving motor is arranged at the bottom in the filter screen drum, and an output shaft of the driving motor is coaxially connected with a rotating shaft; a plurality of supporting rods distributed in the radial direction are arranged at the upper end of the rotating shaft in the circumferential direction, one end of each supporting rod is fixedly connected with the rotating shaft, the other end of each supporting rod is horizontally suspended, and a vertical brush roller is arranged at the suspended end of each supporting rod. The dust removal device is high in dust removal efficiency and capable of effectively solving the problem that materials of the weighing bin are hung on the wall and are bonded.

Description

Technical Field

[0001] The utility model relates to the technical field of roller mill weighing bin dust removal equipment, in particular to a dust removal device for a weighing bin to solve the problem of material hanging on the wall. Background Art

[0002] The cement grinding system is equipped with a roller press that matches the mill to form a combined grinding system. At present, bucket scales are widely used in coal powder, fly ash, mineral powder and other usage scenarios. In actual use, when using bucket scales to process powder, the raw materials of cementing materials are all fine powders. Fine powders have strong adsorption strength and are very easy to adhere to the smooth discharge pipe and the inner wall of the scale bucket, resulting in reduced weighing accuracy of the bucket scale. In addition, the raw materials weighed in the scale bucket will also be blocked in the process of being discharged from the bottom of the scale bucket due to inconsistent air pressure in the discharge pipe, and the dust concentration in the scale bucket will increase. In severe cases, dust explosions will occur.

[0003] At present, the roller mill weighing bin has serious material wall hanging in the bin during actual production and operation. The reason is that the pressure in the bin is too high and the moisture content of the material is high, which causes the gas material to stick to the inner wall of the bin, resulting in serious bin formation, unstable material discharge, frequent bin stepping, and poor control of the bin position in the central control operation. When controlling the frequent material stepping phenomenon, the weighing bin position is simply raised, but the effect is not obvious and cannot meet the production needs well. When the material stepping is serious, the current of the inlet and outlet roller elevators fluctuates greatly, the control is passive, the powder selection efficiency is low, and the raw material discharge of the finished product out of the mill is uneven, which seriously affects the raw material preparation process. The fineness of the raw material out of the mill fluctuates, and the quality of the clinker out of the kiln is seriously affected. Utility Model Content

[0004] The utility model provides a dust removal device for a weighing bin which can solve the problem of serious material sticking to the wall due to unstable air pressure in a traditional roller mill weighing bin.

[0005] The utility model provides a dust removal device for solving the problem of material wall hanging and bunkering in a weighing bin, comprising a dust collecting pipe, a dust collecting pipe is coaxially arranged in the dust collecting pipe, an annular sealing plate is arranged between the outer wall of the dust collecting pipe and the outer wall of the dust collecting pipe, a top plate is arranged at the upper end of the dust collecting pipe, an air outlet is arranged in the middle of the top plate, the air outlet is connected to the air outlet pipe, and an air vent is arranged on the air outlet pipe, a filter screen is coaxially arranged in the dust collecting pipe, the upper end of the filter screen is fixed to the bottom of the top plate, a filter bag is sleeved on the outside of the filter screen, the upper end of the filter bag is fixedly connected to the outer wall of the filter screen, a driving motor is arranged at the bottom of the filter screen, an output shaft of the driving motor passes downward through the bottom plate of the filter screen and extends to the bottom of the filter screen, a rotating shaft is coaxially connected to the output shaft of the driving motor, a plurality of radially distributed support rods are arranged on the upper end of the rotating shaft along the circumferential direction, one end of each support rod is fixedly connected to the rotating shaft, and the other end is suspended horizontally, and a vertical hair roller is arranged at the suspended end of each of the support rods.

[0006] Furthermore, each of the hair rollers includes a central roller shaft, a rubber roller, and bristles. The central roller shaft is vertically arranged at the suspended end of the support rod. A vertical mounting hole is arranged at the suspended end of the support rod. The lower end portion of the central roller shaft is inserted into the mounting hole and is fastened to the support rod through a nut. The rubber roller is coaxially rotatably arranged on the central roller shaft, and bristles are arranged on the outer wall of the rubber roller.

[0007] Furthermore, the rotating shaft is a hollow shaft, a plurality of horizontal airflow tubes are arranged on the side wall of the rotating shaft along the circumferential direction, a plurality of exhaust ports are opened at the bottom of each airflow tube, and a gas nozzle is arranged at each exhaust port.

[0008] Furthermore, an air supply pipe is arranged at the lower end of the rotating shaft, one end of the air supply pipe is connected to the hollow inner cavity of the rotating shaft through a gas rotating joint, and the other end of the air supply pipe passes through the dust removal pipe and the dust collection pipe in sequence and extends to the outside to connect with the air pump for air supply.

[0009] Furthermore, an annular boss is arranged at the bottom of the top plate along the circumferential direction, the upper end of the filter screen cylinder is nested outside the annular boss, and the filter bag and the upper end of the filter screen cylinder are fastened to the annular boss through a throat clamp.

[0010] Furthermore, the lower end of the dust collecting duct is connected to the weighing bin, and the upper end is connected to the exhaust duct of the V-type powder classifier through an air flow duct.

[0011] It can be seen from the above technical solutions that the utility model provides a dust removal device for a weighing bin to solve the problem of material sticking to the wall.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The exhaust volume in the symmetrical weighing bin of the dust collecting pipe is controlled by the vent valve, so that the weighing bin is kept in a stable negative pressure state, and the dust gas entering the dust collecting pipe is quickly reduced. While the weighing bin is kept in a negative pressure state, the material in the air can be recovered. The structure has good stability and can effectively prevent the occurrence of material hanging on the wall of the weighing bin.

[0014] 2. The driving motor drives the rotating shaft to drive the wool roller to rotate and quickly clean up the adsorbed material on the filter bag to prevent the filter bag from being blocked, increase the ventilation efficiency, ensure that the weighing bin maintains a stable negative pressure state, and prevent the occurrence of frequent stepping on the material.

[0015] 3. The air is supplied to the hollow inner cavity of the rotating shaft through the air supply pipe, and the gas is ejected in reverse flow through the gas nozzle on the air flow pipe, which can evenly mix the gas and material turbulence and disperse them around the filter bag for filtering and dust removal. The filter bag has high utilization rate and good dust removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the utility model, the following is a brief introduction to the drawings required for use in the implementation cases. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a schematic diagram of the structure of a dust removal device proposed by the utility model for solving the problem of material sticking to the wall of a weighing bin;

[0018] Figure 2 This is a schematic diagram of the structure of the hair roller of a dust removal device for a weighing bin to solve the problem of material sticking to the wall;

[0019] Figure 3 The utility model discloses a schematic diagram of negative pressure air flow direction of a dust removal device for solving the problem of material adhering to the wall of a weighing bin.

[0020] In the figure:

[0021] 1-Dust collection pipe;

[0022] 2-dust removal pipe; 20-annular sealing plate; 21-top plate; 22-air outlet pipe; 23-air release valve; 211-air outlet; 212-annular boss;

[0023] 3-filter screen cartridge; 31-throat clamp;

[0024] 4-Filter bag;

[0025] 5- driving motor;

[0026] 6-rotating shaft; 61-support rod; 62-air flow tube; 63-gas nozzle;

[0027] 7-hair roller; 71-center roller shaft; 72-rubber roller; 73-brush hair;

[0028] 8- air supply pipe;

[0029] 9- Gas rotary joint;

[0030] 10-Inspection window;

[0031] 100-weighing warehouse;

[0032] 200-V type powder classifier. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0034] See also Figure 1-3 A dust removal device for a weighing bin to solve the problem of material wall adhesion and silo formation, comprising a dust collecting pipe 1, a dust collecting pipe 2 is coaxially arranged in the dust collecting pipe 1, a constriction is arranged at the lower end of the dust collecting pipe 2, an annular sealing plate 20 is arranged between the outer wall of the dust collecting pipe 2 and the outer wall of the dust collecting pipe 1, a top plate 21 is arranged at the upper end of the dust collecting pipe 2, an air outlet 211 is arranged in the middle of the top plate 21, the air outlet 211 is connected to the air outlet pipe 22, an air vent valve 23 is arranged on the air outlet pipe 22, a filter screen 3 is coaxially arranged in the dust collecting pipe 2, the upper end of the filter screen 3 is fixed to the bottom of the top plate 21, and the filter screen 3 is fixed to the bottom of the top plate 21. A filter bag 4 is sleeved on the outside of the filter screen cylinder 3, and the upper end of the filter bag 4 is fixedly connected to the outer wall of the filter screen cylinder 3. A driving motor 5 is arranged at the bottom of the filter screen cylinder 3, and the output shaft of the driving motor 5 passes downward through the bottom plate of the filter screen cylinder 3 and extends to the bottom of the filter screen cylinder 3. The output shaft of the driving motor 5 is coaxially connected to a rotating shaft 6. A plurality of radially distributed support rods 61 are arranged at the upper end of the rotating shaft 6 in a circumferential direction, and one end of each support rod 61 is fixedly connected to the rotating shaft 6, and the other end is suspended horizontally. A vertical hair roller 7 is arranged at the suspended end of each support rod 61.

[0035] In the above embodiment, the air extraction volume in the weighing bin 100 is controlled by the vent valve 23 through the dust collecting pipe 1, so that the weighing bin 100 is maintained in a negative pressure state, and the dust gas entering the dust collecting pipe 1 is quickly reduced. While the weighing bin 100 is maintained in a negative pressure state, the material in the air can be recovered. The structure has good stability, and can effectively prevent the occurrence of material hanging on the wall of the weighing bin 100.

[0036] In this embodiment, see Figure 1 , 2Each of the hair rollers 7 includes a central roller shaft 71, a rubber roller 72, and bristles 73. The central roller shaft 71 is vertically arranged at the suspension end of the support rod 61. A vertical mounting hole is arranged at the suspension end of the support rod 61. The lower end 71 of the central roller shaft is partially inserted into the mounting hole and is fastened to the support rod 61 through a nut. The rubber roller 72 is coaxially rotatably arranged on the central roller shaft 71. Bristles 73 are arranged on the outer wall of the rubber roller 72. The rubber roller 72 is installed close to the filter screen cylinder 3. The rubber roller 72 rotates to clean up the adsorbed material on the filter bag 4 through the bristles 73, thereby increasing the permeability of the filter bag 4, improving the dust removal efficiency, and preventing air pressure fluctuations in the silo.

[0037] In this embodiment, see Figure 1 The rotating shaft 6 is a hollow shaft, and a plurality of horizontal airflow pipes 62 are arranged on the side wall of the rotating shaft 6 in the circumferential direction. A plurality of exhaust ports are provided at the bottom of each airflow pipe 62, and a gas nozzle 63 is provided at each exhaust port. The gas flow is sprayed in reverse direction by the gas nozzle 63, so that the gas flow is turbulently mixed and then evenly distributed to the surrounding of the filter screen cylinder 3 for filtering and dust removal, thereby increasing the utilization rate of the filter bag 4.

[0038] In this embodiment, see Figure 1 An air supply pipe 8 is provided at the lower end of the rotating shaft 6, one end of the air supply pipe 8 is connected to the hollow inner cavity of the rotating shaft 6 through a gas rotating joint 9, and the other end of the air supply pipe 8 passes through the dust removal pipe 2 and the dust collection pipe 1 in turn and extends to the outside to connect with the air pump to supply air, thereby providing high-pressure air in the air supply pipe 8.

[0039] In this embodiment, see Figure 1 An annular boss 212 is provided at the bottom of the top plate 21 along the circumferential direction, and the upper end of the filter screen cylinder 3 is nested outside the annular boss 212. The filter bag 4 and the upper end of the filter screen cylinder 3 are fastened to the annular boss 212 through a throat hoop 31. The throat hoop 31 is an existing commercially available device, which is easy to disassemble and convenient for replacing the filter bag 4.

[0040] In this embodiment, see Figure 1 An inspection port 10 may also be provided on the outer wall of the dust collecting duct 1, through which the internal parts of the equipment may be inspected and replaced.

[0041] In this embodiment, see Figure 1 , 3The lower end of the dust collecting pipe 1 is connected to the weighing bin 100, and the upper end is connected to the exhaust pipe of the V-type powder selector 200 through the airflow pipe. The V-type powder selector 200 is an existing commercially available equipment. The material enters the powder selector from the feed port and falls down step by step along the breaking ventilation blades under the action of gravity. During the falling process, the cakes and agglomerates that are agglomerated together are broken up, and the fine powder is taken out from the air outlet by the air. The coarse powder is discharged from the coarse powder outlet at the bottom of the powder selector under the action of gravity. The moisture in the material is extracted by the pressure of the V-selection outlet, and the negative pressure state is always maintained inside the bin body, so that the material does not hang on the wall and the bin is not blocked, and there is no bin stepping phenomenon. The bin position is stable, ensuring normal material unloading. When the material is cut off on site, the central control operator can intuitively control the bin position within the controllable range to ensure that it is not affected by the bin position and causes the full bin phenomenon on site. The raw material preparation system operates stably when feeding again.

[0042] It can be seen from the above technical solution that when using, refer to Figure 1-3 , the control system starts the V-type powder classifier 200, so that a negative pressure is formed inside the dust collecting pipe 1. Under the action of this negative pressure, a negative pressure state is formed inside the weighing bin 100. At the same time, the dust inside the weighing bin 100 is extracted into the dust removal pipe 2 inside the dust collecting pipe 1, and the air passes through the filter bag 4 and enters the filter screen 3, and then is discharged from the air outlet 211 to the upper end of the dust collecting pipe 1 and then is drawn into the exhaust pipe of the V-type powder classifier 200 through the air flow pipe. The powder in the air flow is filtered by the filter bag 4 and adsorbed on the outer surface of the filter bag 4. The driving motor 5 is started by the controller. The driving motor 5 drives the rotating shaft 6 to rotate coaxially through its output shaft. The coaxial rotation of the rotating shaft 6 drives the support rod 61 to make a circular motion. During the rotation of the support rod 61, the hair roller 7 is driven to make a circular motion. During the rotation of the hair roller 7, the brush 73 contacts the outer surface of the filter bag 4 to adsorb the powder adsorbed on the outer surface of the filter bag 4. The powder is brushed off to keep the filter holes of the filter bag 4 unblocked. At the same time, during the coaxial rotation of the rotating shaft 6, air is supplied to the air flow pipe 62 through the air pump, and the air flow pipe 62 sprays air through the gas nozzle 63. The jet direction is opposite to the gas conveying direction in the dust removal pipe 2. The gas conveyed in the dust removal pipe 2 is mixed evenly in the turbulent flow in the dust removal pipe 2, and then flows evenly to the surroundings of the filter screen cylinder 3 to increase the dust removal efficiency of the screen cylinder. When the weighing bin is in a positive pressure state, the air volume is controlled by adjusting the vent valve. According to the size of the negative pressure at the outlet of the V-type powder selector 200, the vent valve is adjusted at any time by observing the size of the negative pressure inside the weighing bin body during on-site inspections until the inside of the bin body always maintains a negative pressure state. After the material is discharged normally, the central control operator reasonably controls the bin position, and through normal adjustment of the feeding actuator, the weighing bin position is continuously stable, the discharge is stable, and the bin stepping phenomenon is not easy to occur, thereby improving the quality of the raw material preparation process.

[0043] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the utility model disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only, and the true scope of the present invention is indicated by the claims.

[0044] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention.

Claims

1. A dust removal device for a weighing bin to solve the problem of material sticking to the wall, characterized in that: The invention comprises a dust collecting pipe (1), wherein a dust collecting pipe (2) is coaxially arranged in the dust collecting pipe (1), an annular sealing plate (20) is arranged between the outer wall of the dust collecting pipe (2) and the outer wall of the dust collecting pipe (1), a top plate (21) is arranged at the upper end of the dust collecting pipe (2), an air outlet (211) is arranged in the middle of the top plate (21), the air outlet (211) is connected to an air outlet pipe (22), an air release valve (23) is arranged on the air outlet pipe (22), a filter screen cartridge (3) is coaxially arranged in the dust collecting pipe (2), the upper end of the filter screen cartridge (3) is fixed to the bottom of the top plate (21), and a filter bag (23) is sleeved on the outside of the filter screen cartridge (3) 4), the upper end of the filter bag (4) is fixedly connected to the outer wall of the filter screen cylinder (3), a driving motor (5) is arranged at the inner bottom of the filter screen cylinder (3), the output shaft of the driving motor (5) passes through the bottom plate of the filter screen cylinder (3) downward and extends to the bottom of the filter screen cylinder (3), the output shaft of the driving motor (5) is coaxially connected to the rotating shaft (6), a plurality of radially distributed support rods (61) are arranged at the upper end of the rotating shaft (6) along the circumferential direction, one end of each support rod (61) is fixedly connected to the rotating shaft (6), and the other end is suspended horizontally, and a vertically arranged hair roller (7) is arranged at the suspended end of each support rod (61).

2. A dust removal device for solving the problem of material hanging on the wall of a weighing bin according to claim 1, characterized in that: Each of the hair rollers (7) comprises a central roller shaft (71), a rubber roller (72), and bristles (73); the central roller shaft (71) is vertically arranged at the suspended end of the support rod (61); a vertical mounting hole is arranged at the suspended end of the support rod (61); the lower end of the central roller shaft (71) is inserted into the mounting hole and is fastened to the support rod (61) via a nut; the rubber roller (72) is coaxially rotatably arranged on the central roller shaft (71); and bristles (73) are arranged on the outer wall of the rubber roller (72).

3. The dust removal device for solving the problem of material hanging on the wall of a weighing bin according to claim 1 is characterized in that: The rotating shaft (6) is a hollow shaft. A plurality of horizontal airflow pipes (62) are arranged on the side wall of the rotating shaft (6) along the circumferential direction. A plurality of exhaust ports are provided at the bottom of each airflow pipe (62), and a gas nozzle (63) is arranged at each exhaust port.

4. A dust removal device for solving the problem of material hanging on the wall of a weighing bin according to claim 3, characterized in that: An air supply pipe (8) is provided at the lower end of the rotating shaft (6), one end of the air supply pipe (8) is connected to the hollow inner cavity of the rotating shaft (6) via a gas rotating joint (9), and the other end of the air supply pipe (8) passes through the dust removal pipe (2) and the dust collection pipe (1) in sequence and extends to the outside to connect to the air pump for air supply.

5. The dust removal device for solving the problem of material hanging on the wall of a weighing bin according to claim 1 is characterized in that: An annular boss (212) is arranged at the bottom of the top plate (21) along the circumferential direction, the upper end of the filter screen cartridge (3) is nested outside the annular boss (212), and the filter cloth bag (4) and the upper end of the filter screen cartridge (3) are fastened to the annular boss (212) via a throat clamp (31).

6. The dust removal device for solving the problem of material hanging on the wall of a weighing bin according to claim 1 is characterized in that: The lower end of the dust collecting duct (1) is connected to the weighing bin (100), and the upper end is connected to the exhaust duct of the V-shaped powder classifier (200) through an air flow duct.

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