Scraping device for output of granular cellulose material bin

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By setting up a residual material continuous conveying and discharge structure and an arc-shaped paddle design at the bottom of the silo, combined with a conical cap structure, the problem of excessive residue in the silo is solved, continuous and stable feeding and low residue in the silo are achieved, and the operating intensity is reduced.

CN223341940UActive Publication Date: 2025-09-16SICHUAN NITROCELLULOSE CORP

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Patent Information

Application Number: CN202422618749.4
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-10-29
Publication Date: 2025-09-16
Estimated Expiration: 2034-10-29

AI Technical Summary

Technical Problem

After the existing cylindrical silo for granular pulp used for nitration feeding is discharged, a large amount of granular material remains in the scraping device at the bottom, and a large amount of material accumulates between the scraping device and the cylinder wall when the silo is about to be discharged, resulting in discontinuous discharge, increased operation intensity and material residue.

Method used

A scraping device is designed, which includes a silo, a non-metallic scraping assembly and a drive system. A continuous discharge structure for residual material is set up. Through the cooperation of the non-metallic scraping assembly and the drive system, residual particulate material in an extremely low material level state is continuously input into the strip-shaped output hole. Arc-shaped blades and a sloped covering structure are used to reduce accumulation, and a conical cap is set at the center of rotation to avoid material accumulation.

Benefits of technology

It achieves continuous and stable feeding when the material level in the silo is extremely low, reduces the material residue from 20kg to less than 1kg, avoids manual cleaning operations, and ensures the continuity and stability of discharging.

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Abstract

The utility model discloses a material scraping device, particularly discloses a material scraping device for outputting granular cellulose materials from a material bin, and belongs to the technical field of design and manufacture of chemical production process equipment. The utility model provides the scraping device for outputting the granular cellulose material from the stock bin, which is relatively thorough in discharging. The scraping device comprises a stock bin, a non-metal scraping and discharging assembly and a driving system, a strip-shaped output hole is formed in the bottom of the stock bin, the non-metal scraping and discharging assembly movably hinged to the interior of the stock bin is connected with the driving system through the power input end, stretching out of the stock bin, of the non-metal scraping and discharging assembly, and the scraping device further comprises a residual material continuous conveying and discharging structure. The residual material continuous conveying and discharging structure is arranged on the non-metal scraping and discharging assembly; in the granular cellulose material output process, residual granular cellulose materials in the extremely low material level state are continuously input into the strip-shaped output hole through the residual material continuous conveying and discharging structure under the cooperation of the non-metal scraping and discharging assembly and the driving system.

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Description

Technical Field

[0001] The utility model relates to a scraping device, in particular to a scraping device used for outputting granular cellulose material from a silo, and belongs to the technical field of design and manufacturing of chemical production process equipment. Background Art

[0002] After the existing cylindrical silo for granular pulp used for nitrification is completely discharged, a large amount of granular material eventually remains on the ribs and rotation center of the scraper mechanism at the bottom, requiring manual cleaning and increasing operational effort. Furthermore, as the silo nears the end of discharge, the outermost periphery of the scraper mechanism and the silo wall accumulate due to rotation, leaving the scraper mechanism with insufficient material to push into the spiral. This causes discontinuity and instability in the subsequent feeding process of the silo discharge spiral, forcing the subsequent nitrification feed to be stopped, which is also the reason for the high amount of residual material in the silo. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a scraping device for discharging granular cellulose materials from a silo with relatively thorough discharging.

[0004] The technical solution adopted to solve the above technical problems is: a scraping device for outputting granular cellulose material from a silo, comprising a silo, a non-metallic scraping assembly and a drive system, a strip output hole being provided at the bottom of the silo, and the non-metallic scraping assembly movably hinged in the silo being connected to the drive system through its power input end extending out of the silo, the scraping device also comprising a residual material continuous discharge structure, which is arranged on the non-metallic scraping assembly; during the output process of the granular cellulose material, the residual granular cellulose material in an extremely low material level state is continuously input into the strip output hole through the residual material continuous discharge structure in cooperation with the non-metallic scraping assembly and the drive system.

[0005] Furthermore, the silo is a cylindrical silo, and the non-metallic scraper assembly includes a connecting mounting shaft and at least two groups of scraper blades, each group of scraper blades is evenly distributed on the connecting mounting shaft along the circumference, and the non-metallic scraper assembly is hinged at the geometric center position of the bottom plate of the cylindrical silo through the connecting mounting shaft, and the power input end of the connecting mounting shaft passes downward through the bottom plate of the cylindrical silo and extends out of the silo, and a residual material continuous discharge structure is arranged on at least each group of scraper blades.

[0006] A preferred embodiment of the above solution is that the scraping blades are arranged in three to four groups along the circumferential direction on the connecting and mounting shaft, and each group of scraping blades extends in an arc-shaped structure along the length direction.

[0007] Furthermore, the residual material continuous conveying structure includes at least a number of reinforcing ribs with inclined covering structures, the number of which is equivalent to the number of scraping blades. Each reinforcing rib is horizontally arranged on the back of each group of scraping blades along the length direction. The high end of the inclined covering structure is flush with the top surface of the corresponding position of the corresponding scraping blade, and the low end of the inclined covering structure extends along the width direction to the end of the corresponding position of the corresponding reinforcing rib.

[0008] A preferred embodiment of the above solution is that the waste material continuous conveying and discharging structure further comprises a cone cap arranged on the top of the connecting and mounting shaft, and the angle between the oblique side of the cone cap and the horizontal plane is between 45-75 degrees.

[0009] Furthermore, the height of the cone cap is between 200-400 mm.

[0010] A preferred embodiment of the above solution is that the residual material continuous conveying and discharging structure further includes a structure on each group of scraping blades where the height thereof gradually decreases along the length with the connecting end as the starting point.

[0011] Furthermore, the height of the head connection end of each group of scraping blades is 100-200 mm, and the height of the free tail end is 15-40 mm.

[0012] A preferred embodiment of the above solution is that all surfaces of each group of scraping blades except the connecting end surfaces are coated with a hard polytetrafluoroethylene coating.

[0013] The beneficial effects of the present invention are as follows: the technical solution provided by the present application is based on the existing silo, non-metallic scraper assembly and drive system, and is combined with the characteristics of a strip output hole provided at the bottom of the silo, and the non-metallic scraper assembly movably hinged in the silo is connected to the drive system through its power input end extending out of the silo, and the scraper device of the present application is formed by adding a residual material continuous discharge structure, and the residual material continuous discharge structure is arranged on the non-metallic scraper assembly; then, during the output of the granular cellulose material, the residual granular cellulose material in an extremely low material level state is continuously input into the strip output hole through the residual material continuous discharge structure in cooperation with the non-metallic scraper assembly and the drive system. The technical problem in the prior art that a lot of granular material will eventually remain at the reinforcement ribs and the rotation center is solved. After adopting the technical solution of the present application, the granular material remaining at the reinforcement ribs and the rotation center of the non-metallic scraper assembly can be discharged from the silo more thoroughly through the residual material continuous discharge structure. At the same time, through further improvement of the scraping blades, that is, setting the scraping blades themselves into an arc structure along the length direction and designing them into a structure with gradually decreasing height outward, the material transportation can be relatively guaranteed, especially the continuity of material transportation when close to sound. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the existing structure involved in the scraping device for outputting granular cellulose material from a silo according to the present invention;

[0015] Figure 2 This is a three-dimensional structural schematic diagram of the scraping device for outputting granular cellulose material from a silo according to the utility model, in which the residual material continuous conveying structure is arranged on a non-metallic scraping assembly.

[0016] The markings in the figure are: silo 1, strip output hole 2, connecting and mounting shaft 3, scraping blade 4, inclined covering structure 5, reinforcing rib 6, cone cap 7. DETAILED DESCRIPTION

[0017] like Figure 1 、 Figure 2 The present invention illustrates a scraper device for discharging granular cellulose materials from a silo, providing a more thorough discharge. The scraper device comprises a silo 1, a non-metallic scraper assembly, and a drive system. A strip-shaped output aperture 2 is provided at the bottom of the silo 1. The non-metallic scraper assembly, movably hinged within the silo, is connected to the drive system via its power input end extending from the silo 1. The scraper device also includes a continuous residual material discharge structure, which is mounted on the non-metallic scraper assembly. During the granular cellulose material discharge process, any residual granular cellulose material at an extremely low material level is continuously fed into the strip-shaped output aperture 2 through the continuous residual material discharge structure, in conjunction with the non-metallic scraper assembly and the drive system. The technical solution provided by the present application is based on the existing silo, non-metallic scraper assembly and drive system, and is combined with the characteristics of a strip output hole provided at the bottom of the silo, and a non-metallic scraper assembly movably hinged in the silo connected to the drive system through its power input end extending out of the silo. The scraper device of the present application is formed by adding a residual material continuous discharge structure, and the residual material continuous discharge structure is arranged on the non-metallic scraper assembly; then, during the output of the granular cellulose material, the residual granular cellulose material at an extremely low material level is continuously input into the strip output hole through the residual material continuous discharge structure in cooperation with the non-metallic scraper assembly and the drive system. The technical problem in the prior art that a large amount of granular material will eventually remain at the reinforcement ribs and the rotation center is solved. After adopting the technical solution of the present application, the granular material remaining at the reinforcement ribs and the rotation center of the non-metallic scraper assembly can be discharged from the silo more thoroughly through the residual material continuous discharge structure.

[0018] Accordingly, in combination with the structural features of the prior art, in order to minimize the cost of modification, the silo 1 described in this application is a cylindrical silo, and the non-metallic scraper assembly includes a connecting and mounting shaft 3 and at least two groups of scraper blades 4. Each group of scraper blades 4 is evenly distributed along the circumference of the connecting and mounting shaft 3. The non-metallic scraper assembly is hinged to the geometric center of the cylindrical silo bottom plate through the connecting and mounting shaft 3. The power input end of the connecting and mounting shaft extends downward through the cylindrical silo bottom plate and out of the silo 1. A continuous waste material conveying structure is arranged on at least each group of scraper blades 4. A more preferred structure is that there are three to four groups of scraper blades 4 arranged circumferentially on the connecting and mounting shaft 3, and each group of scraper blades 4 extends in an arc-shaped structure along the length direction.

[0019] Furthermore, based on the structure of existing non-metallic scraper components, in order to minimize the residue of materials at extremely low material levels and the continuity of transportation, the residual material continuous conveying structure described in the present application includes at least a number of reinforcing ribs 6 containing bevel covering structures 5, which are equivalent to the number of scraper blades 4. Each reinforcing rib 6 is arranged horizontally along the length direction on the back of each group of scraper blades 4. The high end of the bevel covering structure 5 is flush with the top surface of the corresponding position of the corresponding scraper blade 4, and the low end of the bevel covering structure 5 extends along the width direction to the end of the corresponding position of the corresponding reinforcing rib 6. Furthermore, in order to avoid the residue of materials at the top of the connecting and installing shaft, the residual material continuous conveying structure described in the present application also includes a conical cap 7 arranged at the top of the connecting and installing shaft, and the angle between the bevel of the conical cap 7 and the horizontal plane is between 45-75°. At this time, the height of the conical cap 7 is preferably between 200-400mm. At the same time, to maximize the continuity of material output, the scrap material continuous conveying structure of the present application also includes a structure in which the height of each group of scraping blades 4 gradually decreases along the length direction starting from the connection end. Specifically, the height of the head connection end of each group of scraping blades is 100-200mm, and the height of the free tail end is 15-40mm.

[0020] Accordingly, in order to ensure the safety of transportation, all surfaces of each group of scraping blades 4 in the present application except the connecting end surface are coated with a hard polytetrafluoroethylene coating.

[0021] In summary, the main technical points of the technical solution provided by this application are:

[0022] The blade reinforcement ribs are covered with an inclined surface structure to avoid residual material accumulation on the blade reinforcement ribs; the height of the arc-shaped blades is gradually changed to reduce the amount of material accumulated at the outermost periphery of the scraper device and the silo wall due to rotation, ensuring continuous and stable feeding when the silo level is extremely low; and a conical cap is provided at the center of rotation to avoid residual material accumulation at the center of rotation.

[0023] In summary, the above technical solutions provided by this application are

[0024] 1) Ensures continuous and stable feeding when the material level in the silo is extremely low;

[0025] 2) The amount of material residue in the silo has been greatly reduced. The amount of granular pulp residue in the silo has been reduced from 20kg to less than 1kg, avoiding the need for manual entry into the equipment for cleaning operations.

[0026] The technical solution of this application is further described below through specific embodiments:

[0027] The technical problem to be solved by the present application is to provide a silo scraping device that can ensure continuous and stable feeding of granular pulp at an extremely low material level in the silo.

[0028] 1) The utility model is composed of a hard PTFE plate, blades, reinforcing ribs, a conical cap at the center of rotation and other structures.

[0029] 2) The front, bottom and tail of the blade are covered with hard PTFE material to avoid metal grinding chips.

[0030] 3) The back of the blade is a reinforcing rib, which is a horizontal structure. The back of the blade adopts an inclined structure (45-75 degrees) to cover the reinforcing rib to avoid the accumulation of reinforcing rib material.

[0031] 4) The propeller blades are curved with a gradient height structure, gradually decreasing from the center of rotation to the end. The highest point of the blade is 100-200mm, and the height of the tail end of the blade is 15-40mm.

[0032] 5) There are 2 to 4 curved blades, which are connected to the central rotating shaft at the bottom of the silo and are detachable.

[0033] 6) A conical cap structure is set at the rotation center of the scraper device. The bottom surface of the conical cap completely covers the rotation center. The height of the conical cap is 200-400mm.

[0034] The reinforcement ribs on the back of the blades are provided with a sloped covering structure to avoid residual material accumulation on the reinforcement ribs; a conical cap structure is provided at the rotation center to avoid residual material accumulation at the rotation center; the height of the arc-shaped blades is a gradual structure, which gradually decreases from the rotation center to the end, that is, the height of the end of the blade is the lowest, so that when the silo is about to be discharged, the amount of material accumulated at the outermost periphery of the scraping device and the silo wall due to rotation is reduced, which greatly reduces the residual amount of granular material in the silo during discontinuous and stable feeding, and ensures continuous and stable feeding when the silo is at an extremely low material level.

[0035] Example 1

[0036] The granular material silo scraping device of the present application is composed of a hard PTFE plate, a paddle, a reinforcing rib, a conical cap at the center of rotation and other structures. The front, bottom and tail of the paddle are covered with a hard PTFE material, and the back of the paddle is a reinforcing rib. The reinforcing rib is a horizontal structure, and the back of the paddle adopts an inclined structure (55°) to cover the reinforcing rib. The paddle is an arc-shaped paddle, and the height of the arc-shaped paddle is a gradual structure. The height gradually decreases from the center of rotation to the end. The highest point of the paddle is 100mm, and the height of the tail end of the paddle is 30mm. There are 3 arc-shaped paddles, which are connected to the central rotation axis at the bottom of the silo and are detachable. A conical cap structure is set at the rotation center of the scraping device. The bottom surface of the conical cap completely covers the rotation center. The height of the conical cap is 350mm.

[0037] The silo scraper device ensures continuous and stable feeding when the silo level is extremely low. The granular pulp residue in the silo is reduced from the original 20kg to less than 1kg, avoiding manual entry into the equipment for cleaning operations.

Claims

1. A scraping device for discharging granular cellulose material from a silo, comprising a silo (1), a non-metallic scraping assembly, and a drive system, wherein a strip-shaped output hole (2) is provided at the bottom of the silo (1), and the non-metallic scraping assembly movably hinged in the silo is connected to the drive system via its power input end extending out of the silo (1), and is characterized in that: The scraping device further comprises a residual material continuous conveying and discharging structure, which is arranged on the non-metallic scraping assembly; during the output process of the granular cellulose material, the residual granular cellulose material at an extremely low material level is continuously input into the strip-shaped output hole (2) through the residual material continuous conveying and discharging structure in cooperation with the non-metallic scraping assembly and the driving system.

2. The scraping device for discharging granular cellulose material from a silo according to claim 1, characterized in that: The silo (1) is a cylindrical silo, and the non-metallic scraper assembly includes a connecting mounting shaft (3) and at least two groups of scraper blades (4), each group of scraper blades (4) is evenly distributed on the connecting mounting shaft (3) along the circumference, and the non-metallic scraper assembly is hinged at the geometric center position of the bottom plate of the cylindrical silo through the connecting mounting shaft (3), and the power input end of the connecting mounting shaft passes downward through the bottom plate of the cylindrical silo and extends out of the silo (1), and a residual material continuous conveying structure is arranged on at least each group of scraper blades (4).

3. The scraping device for discharging granular cellulose material from a silo according to claim 2, characterized in that: There are three to four groups of scraping blades (4) arranged circumferentially on the connecting mounting shaft (3), and each group of scraping blades (4) extends in an arc-shaped structure along the length direction.

4. The scraping device for discharging granular cellulose material from a silo according to claim 2 or 3, characterized in that: The residual material continuous conveying structure comprises at least a number of reinforcing ribs (6) including inclined surface covering structures (5) equal in number to the number of scraping blades (4), each reinforcing rib (6) being arranged horizontally along the length direction on the back of each group of scraping blades (4), the high end of the inclined surface covering structure (5) being flush with the top surface of the corresponding position of the corresponding scraping blade (4), and the low end of the inclined surface covering structure (5) extending along the width direction to the end of the corresponding position of the corresponding reinforcing rib (6).

5. The scraping device for discharging granular cellulose material from a silo according to claim 4, characterized in that: The residual material continuous conveying structure further comprises a cone cap (7) arranged on the top of the connecting mounting shaft, wherein the angle between the oblique side of the cone cap (7) and the horizontal plane is between 45° and 75°.

6. The scraping device for discharging granular cellulose material from a silo according to claim 5, characterized in that: The height of the cone cap (7) is between 200-400 mm.

7. The scraping device for discharging granular cellulose material from a silo according to claim 6, characterized in that: The residual material continuous conveying and discharging structure also includes a structure in which the height of each group of scraping blades (4) gradually decreases along the length direction with the connection end as the starting point.

8. The scraping device for discharging granular cellulose material from a silo according to claim 7, characterized in that: The height of the head connection end of each group of scraping blades is 100-200mm, and the height of the free tail end is 15-40mm.

9. The scraping device for discharging granular cellulose material from a silo according to claim 8, characterized in that: Each group of scraping blades (4) is coated with a hard polytetrafluoroethylene coating on all surfaces except the connection end surfaces.