Material distribution device and system of belt type drying equipment

Abstract

The invention discloses a material distribution device and system for belt type drying equipment, relates to the technical field of material conveying, and mainly aims to improve the uniformity of material distribution in the width direction of a mesh belt of a belt type drying machine. According to the main technical scheme, the material distribution device of the belt type drying equipment comprises a spiral conveying mechanism, the spiral conveying mechanism comprises a conveying pipe and a spiral blade, the spiral blade is coaxially arranged in the conveying pipe, a feeding port is formed in the upper side of one end of the conveying pipe, and a first spiral discharging port is formed in the side face of the other end of the conveying pipe; the shaft side of the other end of the conveying pipe is sleeved with the adjusting pipe, the adjusting pipe covers the first spiral discharging opening, and a second spiral discharging opening is formed in the side face of the pipe wall of the adjusting pipe; the projection of the first spiral discharge port on the vertical plane is a first projection line, the projection of the second spiral discharge port on the vertical plane is a second projection line, the first projection line has a first dip angle in the material conveying direction of the spiral conveying mechanism, the second projection line has a second dip angle, and the first dip angle is larger than the second dip angle.

Description

Technical Field

[0001] This invention relates to the field of material conveying technology, and in particular to a material feeding device and system for a belt drying equipment. Background Technology

[0002] Belt dryers are highly practical in modern industrial production, offering high dehydration efficiency during material drying. Conveyor belt dryers utilize forced air circulation, enabling rapid material drying in a short time. The drying process is relatively uniform, ensuring the quality of the dried material. Operating a conveyor belt dryer is very simple; automated production can be achieved by simply setting equipment parameters. It allows for continuous feeding and discharging, significantly increasing production capacity.

[0003] Currently, most belt drying equipment uses methods such as oscillating material feeders, vibrating feeders, or gravity-feeding material distribution. These methods often result in uneven material distribution, complex structures, difficulty in maintenance, or high maintenance costs. Furthermore, different material distribution devices have different requirements for the materials.

[0004] For example, patent CN109696047A describes a silica mud granulation and drying production line, which involves a swinging material feeding mechanism. The material feeding conveyor belt swings back and forth within a set angle, and the material continuously falls onto the dryer mesh belt within this angle. The mesh belt moves forward continuously, thus achieving continuous material feeding. However, in the actual feeding process, the two ends of the swinging mechanism pause briefly to reverse direction. This results in a material distribution on the mesh belt that is more abundant at the edges and less abundant in the middle, with obvious zigzag feeding marks. This uneven and inconsistent feeding leads to inconsistent drying times after the material enters the drying chamber, reducing drying efficiency and wasting energy. Summary of the Invention

[0005] In view of this, the present invention provides a material distribution device and system for a belt dryer, the main purpose of which is to improve the uniformity of material distribution in the width direction of the belt dryer.

[0006] To achieve the above objectives, the present invention mainly provides the following technical solutions:

[0007] On one hand, the present invention provides a fabric feeding device for a belt drying equipment, the device comprising: a screw conveyor mechanism and an adjusting pipe;

[0008] The spiral conveying mechanism includes a conveying pipe and spiral blades. The spiral blades are coaxially arranged inside the conveying pipe. A feed inlet is provided on the upper side of one end of the conveying pipe, and a first spiral discharge outlet is provided on the side of the other end of the conveying pipe.

[0009] The regulating tube is sleeved on the other end of the conveying tube, the regulating tube covers the first spiral discharge port, and the side wall of the regulating tube is provided with a second spiral discharge port.

[0010] Wherein, the projection of the first spiral discharge port on the vertical plane is the first projection line, and the projection of the second spiral discharge port on the vertical plane is the second projection line. Along the material conveying direction of the spiral conveying mechanism, the first projection line has a first inclination angle, and the second projection line has a second inclination angle. The first inclination angle is greater than the second inclination angle.

[0011] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0012] Optionally, the length of the first projection line is equal to the length of the second projection line, and the midpoint of the first projection line and the midpoint of the second projection line are located at the same radial cross-section of the conveying pipe.

[0013] Optionally, a limiting bolt is also included. The wall of the adjusting pipe is provided with a radial threaded hole, and the limiting bolt is threaded into the radial threaded hole to abut against the wall of the conveying pipe.

[0014] Optionally, it also includes a bearing and an annular plate, wherein the inner ring of the bearing is fitted onto the conveying pipe, the two ends of the adjusting pipe are fixedly connected to the inner ring of the bearing, the conveying pipe is fixedly connected to the inner edge of the annular plate, and the outer edge of the annular plate is fixedly connected to the outer ring of the bearing.

[0015] Optionally, it may also include a driven gear ring and a drive gear, wherein the driven gear ring is coaxially connected to the shaft side of the adjusting tube, and the drive gear meshes with the driven gear ring.

[0016] Optionally, the diameter of the drive gear is one-fifth the diameter of the driven gear ring.

[0017] On the other hand, the present invention provides a fabric feeding system for a belt dryer, the system comprising: a controller, a laser profilometer, and the aforementioned fabric feeding device for the belt dryer, wherein the drive gear is coaxially connected to the output shaft of a stepper motor, the spiral blades are coaxially connected to the output shaft of the drive motor, the conveying pipe and the laser profilometer are arranged sequentially along the conveying direction of the dryer mesh belt, the axial direction of the conveying pipe is perpendicular to the conveying direction of the dryer mesh belt, the adjusting pipe is located directly above the dryer mesh belt, the laser profilometer is electrically connected to the input terminal of the controller, and the output terminal of the controller is electrically connected to the stepper motor and the drive motor respectively.

[0018] By employing the above technical solution, the present invention has at least the following advantages:

[0019] Before this device is put into operation, the screw conveyor mechanism is installed above the belt dryer, with the axis of the conveyor pipe perpendicular to the length of the dryer's mesh belt, and the adjusting pipe located directly above the dryer's mesh belt.

[0020] When the material flow rate of the screw conveyor is small and the material thickness at the bottom of the conveying pipe is thin (the material thickness is maintained below one-quarter of the conveying pipe diameter), the regulating pipe is rotated so that the second spiral discharge port approaches the first spiral discharge port from below. When the front end of the second spiral discharge port coincides with the front end of the first spiral discharge port, the rear end of the second spiral discharge port interferes with the rear end of the first spiral discharge port, forming a new material discharge port. The height difference between the front and rear ends of this material discharge port is reduced, and the longitudinal width of the rear end of the material discharge port becomes smaller. In this way, the material accumulation thickness can be aligned with the height of the front end of the material discharge port, allowing the material to overflow at the front end. At the same time, the longitudinal width of the rear end decreases, and the instantaneous overflow of the material decreases. The longitudinal width of the front end remains unchanged, indirectly increasing the instantaneous overflow of the material at the front end. Thus, the material overflow at the front and rear ends of the material discharge port tends to be balanced, thereby making the material thickness more uniform in the width direction of the dryer's mesh belt.

[0021] When the material flow rate of the screw conveyor is large and the material thickness is maintained at more than half the diameter of the conveying pipe, the regulating pipe is rotated so that the second spiral discharge port approaches the first spiral discharge port from above. When the rear end of the second spiral and the rear end of the first spiral discharge port coincide, the front end of the second spiral discharge port and the front end of the first spiral discharge port interfere with each other, forming a new material discharge port. The height difference between the front and rear ends of this material discharge port remains unchanged (because the material thickness in the conveying pipe is large at this time, the influence of the height difference between the front and rear ends of the material discharge port on the material overflow can be ignored). However, the longitudinal width of the front end of this material discharge port becomes smaller. Thus, even if the material density in the conveying pipe is large and the discharge pressure at the front end of this material discharge port is large, the instantaneous overflow at the front end will not be large. This allows most of the material to be pushed to the rear end, so that the instantaneous overflow at the rear end is not less than the instantaneous overflow at the front end. This makes the material overflow at the front and rear ends of this material discharge port tend to be balanced, and thus the material thickness tends to be consistent in the width direction of the dryer mesh belt.

[0022] This device allows for adaptive adjustment of the front and rear dimensions of the material discharge port as the thickness of the material inside the conveying pipe changes, ensuring uniform material distribution on the dryer's mesh belt. Attached Figure Description

[0023] Figure 1 This is a schematic diagram showing the disassembled structure of a fabric feeding device for a belt drying equipment according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the working state of a belt dryer material feeding device when the material flow rate is relatively small, provided by an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the working state of a belt dryer material feeding device when the material flow rate is large, provided by an embodiment of the present invention.

[0026] Figure 4 A partial perspective perspective view of a fabric feeding device for a belt drying equipment provided in an embodiment of the present invention;

[0027] Figure 5 This is a partial side view of a fabric feeding device for a belt drying equipment according to an embodiment of the present invention;

[0028] Figure 6 A first-view perspective perspective view of a fabric feeding system for a belt drying device provided in an embodiment of the present invention;

[0029] Figure 7 A second-view perspective perspective view of a fabric feeding system for a belt drying device provided in an embodiment of the present invention;

[0030] Figure 8 This is a top view of a fabric feeding system for a belt drying device provided in an embodiment of the present invention;

[0031] Figure 9 This is a control principle diagram of a fabric feeding system for a belt drying equipment provided in an embodiment of the present invention.

[0032] The reference numerals in the accompanying drawings include: 1. Conveying pipe; 2. Spiral blade; 3. Feed inlet; 4. First spiral discharge outlet; 5. Adjusting pipe; 6. Second spiral discharge outlet; 7. Limiting bolt; 8. Annular plate; 9. Inner ring; 10. Outer ring; 11. Driven gear ring; 12. Stepper motor; 13. Drive motor; 14. Laser profilometer; 15. Mesh belt; 16. Controller; 17. Detailed Implementation

[0033] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, in one aspect, an embodiment of the present invention provides a fabric feeding device for a belt drying equipment, which includes: a screw conveyor mechanism and an adjusting pipe 5;

[0036] The spiral conveying mechanism includes a conveying pipe 1 and a spiral blade 2. The spiral blade 2 is coaxially arranged inside the conveying pipe 1. A feed inlet 3 is provided on the upper side of one end of the conveying pipe 1, and a first spiral discharge outlet 4 is provided on the side of the other end of the conveying pipe 1.

[0037] The regulating pipe 5 is sleeved on the other end of the conveying pipe 1, the regulating pipe 5 covers the first spiral discharge port 4, and the side wall of the regulating pipe 5 is provided with a second spiral discharge port 6.

[0038] Wherein, the projection of the first spiral discharge port 4 on the vertical plane is the first projection line, and the projection of the second spiral discharge port 6 on the vertical plane is the second projection line. Along the material conveying direction of the spiral conveying mechanism, the first projection line has a first inclination angle, and the second projection line has a second inclination angle. The first inclination angle is greater than the second inclination angle.

[0039] The working process of a fabric feeding device in a belt drying equipment is as follows:

[0040] Before this device is put into operation, the screw conveyor mechanism is installed above the belt dryer, with the axis of the conveyor pipe 1 perpendicular to the length of the dryer mesh belt, and the adjusting pipe 5 located directly above the dryer mesh belt.

[0041] like Figure 2 As shown, when the material flow rate of the screw conveyor is small and the material thickness at the bottom of the conveying pipe 1 is thin (the material thickness is maintained below one-quarter of the diameter of the conveying pipe 1), the adjusting pipe 5 is rotated so that the second spiral discharge port 6 approaches the first spiral discharge port 4 from below. When the front end of the second spiral discharge port 6 coincides with the front end of the first spiral discharge port 4, the rear end of the second spiral discharge port 6 interferes with the rear end of the first spiral discharge port 4, forming a new material discharge port. The height difference between the front and rear ends of the material discharge port is reduced, and the longitudinal width of the rear end of the material discharge port becomes smaller. In this way, the material accumulation thickness can be aligned with the height of the front end of the material discharge port, allowing the material to overflow from the front end. At the same time, the longitudinal width of the rear end decreases, and the instantaneous overflow of the material decreases. The longitudinal width of the front end remains unchanged, indirectly increasing the instantaneous overflow of the material at the front end. Thus, the material overflow from the front and rear ends of the material discharge port tends to be balanced, thereby making the material thickness more uniform in the width direction of the dryer mesh belt.

[0042] like Figure 3As shown, when the material flow rate of the screw conveyor is large and the material thickness is maintained at more than half the diameter of the conveying pipe 1, the regulating pipe 5 is rotated so that the second spiral discharge port 6 approaches the first spiral discharge port 4 from above. When the rear end of the second spiral and the rear end of the first spiral discharge port 4 coincide, the front end of the second spiral discharge port and the front end of the first spiral discharge port 4 interfere with each other, forming a new material discharge port. The height difference between the front and rear ends of the material discharge port remains unchanged (because the material thickness in the conveying pipe 1 is large at this time, the influence of the height difference between the front and rear ends of the material discharge port on the material overflow can be ignored). However, the longitudinal width of the front end of the material discharge port becomes smaller. In this way, even if the material density in the conveying pipe 1 is large and the discharge pressure at the front end of the material discharge port is large, the instantaneous overflow at the front end will not be large, so that most of the material can be pushed to the rear end, so that the instantaneous overflow at the rear end is not less than the instantaneous overflow at the front end, so that the material overflow at the front and rear ends of the material discharge port tends to be balanced, and the material thickness tends to be consistent in the width direction of the dryer mesh belt.

[0043] With this device, the front and rear dimensions of the material outlet can be adaptively adjusted according to the change in the material thickness inside the conveying pipe 1, so that the material distribution on the dryer mesh belt remains uniform.

[0044] Specifically, the number of spiral coils in the first spiral discharge port 4 is less than a quarter turn, and the number of spiral coils in the second spiral discharge port 6 is less than a quarter turn.

[0045] In a specific embodiment, the length of the first projection line is equal to the length of the second projection line, and the midpoint of the first projection line and the midpoint of the second projection line are located at the same radial cross section of the conveying pipe 1.

[0046] In this embodiment, specifically, the midpoint of the first projection line and the midpoint of the second projection line are located on the same radial cross section of the conveying pipe 1. The center point of the first spiral discharge port 4 and the center point of the second spiral discharge port 6 are also located on the same radial cross section of the conveying pipe 1. When the second spiral discharge port 6 and the first spiral discharge port 4 approach each other, the center point of the first spiral discharge port 4 can coincide with the center point of the second spiral discharge port 6. At the same time, the front end of the second spiral discharge port 6 and the front end of the first spiral discharge port 4 can coincide with each other, or the rear end of the second spiral discharge port 6 and the rear end of the first spiral discharge port 4 can coincide with each other, thereby achieving the purpose of adjusting the discharge ratio of the front and rear ends of the first spiral discharge port 4.

[0047] like Figures 1 to 3As shown, in a specific embodiment, a limiting bolt 7 is also included. The wall of the adjusting pipe 5 is provided with a radial threaded hole, and the limiting bolt 7 is threadedly connected to the radial threaded hole to abut against the wall of the conveying pipe 1.

[0048] In this embodiment, specifically, when the material feeding amount at the feed port 3 of the screw conveyor tends to be stable, the thickness of the material continuously conveyed in the conveying pipe 1 also tends to be stable. After rotating the adjusting pipe 5, the relative positions of the first spiral discharge port 4 and the second spiral discharge port 6 can be temporarily fixed. At this time, tighten the limiting bolt 7, and the limiting bolt 7 abuts against the pipe wall of the conveying pipe 1, so that the adjusting pipe 5 is not easy to rotate relative to the conveying pipe 1.

[0049] like Figure 5 As shown, in a specific embodiment, it also includes a bearing and an annular plate 8. The inner ring 9 of the bearing is sleeved on the conveying pipe 1. The two ends of the adjusting pipe 5 are fixedly connected to the inner ring 9 of the bearing. The conveying pipe 1 is fixedly connected to the inner edge of the annular plate 8. The outer edge of the annular plate 8 is fixedly connected to the outer ring 10 of the bearing.

[0050] In this embodiment, the two ends of the regulating pipe 5 are fixedly connected to the inner ring 9 of the bearing, making it possible for the regulating pipe 5 and the inner ring 9 of the bearing to be fitted together on the conveying pipe 1. This also allows for a smaller gap between the regulating pipe 5 and the conveying pipe 1, preventing a large amount of conveyed material particles from entering the gap between the regulating pipe 5 and the conveying pipe 1. At the same time, the conveying pipe 1 is fixedly connected to the outer ring 10 of the bearing through the annular plate 8, which also ensures the coaxiality of the regulating pipe 5 and the conveying pipe 1.

[0051] like Figure 5 As shown, in a specific embodiment, it also includes a driven gear ring 11 and a drive gear 12. The driven gear ring 11 is coaxially connected to the shaft side of the adjusting tube 5, and the drive gear 12 meshes with the driven gear ring 11.

[0052] In this embodiment, specifically, the inner edge of the driven gear ring 11 is welded to the outer side of the tube wall of the regulating tube 5, and the drive gear 12 is keyed to the output shaft of the stepper motor 13, so that the stepper motor 13 can drive the regulating tube 5 to rotate through the meshing drive gear 12 and driven gear ring 11.

[0053] In a specific embodiment, the diameter of the drive gear 12 is one-fifth the diameter of the driven gear ring 11.

[0054] In this embodiment, specifically, the drive gear 12 is coaxially connected to the output shaft of the stepper motor 13. By controlling the step angle of the stepper motor 13, the drive gear 12 rotates by a first angle, thereby causing the driven gear ring 11 to rotate by one-fifth of a first angle. In this way, the adjustment tube 5 can be rotated at a small angle, thereby achieving a slight adjustment of the relative position of the first spiral discharge port 4 and the second spiral discharge port 6, thereby slightly adjusting the longitudinal width at both ends of the material discharge port.

[0055] like Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, another embodiment of the present invention provides a fabric feeding system for a belt dryer. The system includes: a controller 17, a laser profilometer 15, and the aforementioned fabric feeding device for the belt dryer. The drive gear 12 is coaxially connected to the output shaft of the stepper motor 13, and the spiral blade 2 is coaxially connected to the output shaft of the drive motor 14. The conveying pipe 1 and the laser profilometer 15 are arranged sequentially along the conveying direction of the dryer mesh belt 16. The axial direction of the conveying pipe 1 is perpendicular to the conveying direction of the dryer mesh belt 16. The adjusting pipe 5 is located directly above the dryer mesh belt 16. The laser profilometer 15 is electrically connected to the input terminal of the controller 17, and the output terminal of the controller 17 is electrically connected to the stepper motor 13 and the drive motor 14, respectively.

[0056] In this embodiment, specifically, the laser profilometer 15 includes a laser emitter and a photosensitive unit. The laser emitter emits a linear laser beam that illuminates the surface of the material on the conveyor belt 16. Due to the different shapes and heights of the material surface, the laser beam undergoes varying degrees of scattering and reflection. The reflected laser beam is received by the photosensitive unit (CCD or CMOS camera). The photosensitive unit converts the received light signal into an electrical signal and transmits it to the controller 17. The controller 17 extracts the contour line through an image processing algorithm and generates an intensity map, a depth map, and point cloud data to determine the material thickness in the width direction of the conveyor belt 16.

[0057] If the average thickness of the material in the width direction of the mesh belt 16 exceeds the set value, the controller 17 reduces the feed rate of the screw conveyor and adjusts the output power of the drive motor 14, thereby reducing the amount of material received by the mesh belt 16 per unit time and reducing the average thickness of the material on the mesh belt 16 to the set value.

[0058] Meanwhile, if the material thickness in the width direction of the mesh belt 16 is inconsistent, the controller 17 adjusts the stepping angle and direction of the stepper motor 13, thereby changing the overlapping position and area size of the first spiral discharge port 4 and the second spiral discharge port 6, thereby adjusting the front and rear dimensions of the material discharge port of the spiral conveyor mechanism, and thus adjusting the material thickness in the width direction of the mesh belt 16 to be more consistent. The specific logic for adjusting the material thickness of the mesh belt 16 is as described in the working process of the aforementioned device.

[0059] The actual application scenarios of this device and system are as follows:

[0060] The dryer has a mesh belt width of 1500mm. The first spiral discharge port 4 is 1365mm long, 83mm wide, and has a downward inclination angle of 3.5°. The second spiral discharge port 6 is 1365mm long, 93mm wide, and has a downward inclination angle of 1.7°. The material conveyed by the spiral conveyor mechanism is 10-100 mesh silicon powder with a moisture content of 15.4%. The mesh belt drive speed is adjusted to 2000mm / min, and the spiral conveying capacity is controlled at approximately 0.8m³ / h. The rotating regulating pipe 5 ensures uniform material distribution. The silicon powder is evenly distributed throughout the mesh belt, with a width of approximately 1350-1400mm and a thickness of approximately 5mm. There are no instances of thick or missing material in the middle of the dryer's mesh belt.

[0061] The material feeding device of this belt dryer enables materials of various particle sizes to be evenly laid on the drying mesh belt. The uniformity of material thickness in the width direction of the mesh belt can be adjusted by rotating the adjusting pipe 5.

[0062] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fabric feeding device for a belt drying equipment, characterized in that, include: A spiral conveying mechanism includes a conveying pipe and spiral blades. The spiral blades are coaxially arranged inside the conveying pipe. A feed inlet is provided on the upper side of one end of the conveying pipe, and a first spiral discharge outlet is provided on the side of the other end of the conveying pipe. An adjusting pipe is sleeved on the other end of the conveying pipe, the adjusting pipe covers the first spiral discharge port, and the adjusting pipe has a second spiral discharge port on its side wall. Wherein, the projection of the first spiral discharge port on the vertical plane is the first projection line, and the projection of the second spiral discharge port on the vertical plane is the second projection line. Along the material conveying direction of the spiral conveying mechanism, the first projection line has a first inclination angle, and the second projection line has a second inclination angle. The first inclination angle is greater than the second inclination angle.

2. The fabric feeding device of the belt dryer according to claim 1, characterized in that, The length of the first projection line is equal to the length of the second projection line, and the midpoint of the first projection line and the midpoint of the second projection line are located at the same radial cross section of the delivery pipe.

3. The fabric feeding device of the belt dryer according to claim 1, characterized in that, It also includes a limiting bolt, wherein the wall of the adjusting pipe is provided with a radial threaded hole, and the limiting bolt is threaded into the radial threaded hole to abut against the wall of the conveying pipe.

4. The fabric feeding device of the belt dryer according to claim 1, characterized in that, It also includes a bearing and an annular plate. The inner ring of the bearing is fitted onto the conveying pipe. The two ends of the adjusting pipe are fixedly connected to the inner ring of the bearing. The conveying pipe is fixedly connected to the inner edge of the annular plate. The outer edge of the annular plate is fixedly connected to the outer ring of the bearing.

5. The fabric feeding device of the belt dryer according to claim 4, characterized in that, It also includes a driven gear ring and a drive gear, wherein the driven gear ring is coaxially connected to the shaft side of the adjusting tube, and the drive gear meshes with the driven gear ring.

6. The fabric feeding device for the belt dryer according to claim 5, characterized in that, The diameter of the drive gear is one-fifth the diameter of the driven gear ring.

7. A fabric feeding system for a belt drying equipment, characterized in that, include: The device comprises a controller, a laser profilometer, and a fabric feeding device for a belt dryer as described in claim 4 or 5. The drive gear is coaxially connected to the output shaft of a stepper motor, and the spiral blades are coaxially connected to the output shaft of the drive motor. The conveying pipe and the laser profilometer are arranged sequentially along the conveying direction of the dryer's mesh belt. The axial direction of the conveying pipe is perpendicular to the conveying direction of the dryer's mesh belt. The adjusting pipe is located directly above the dryer's mesh belt. The laser profilometer is electrically connected to the input terminal of the controller, and the output terminal of the controller is electrically connected to the stepper motor and the drive motor, respectively.

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