Spiral feeding machine capable of improving conveying efficiency

Abstract

The utility model relates to a spiral feeding machine capable of improving conveying efficiency, which comprises a rotating shaft, a power component for driving the rotating shaft to rotate and a shell sleeved outside the rotating shaft, spiral blades are wound on the outer circumference of the rotating shaft along the axial direction, the edge of the outer circumference of the spiral blades is close to the inner side wall of the shell, one end of the shell is provided with a feeding port, and the other end of the shell is provided with a discharging port. The other end of the shell is provided with a discharge port, and the outline of the cross section of the shell in the radial direction is a bent polygon. A traditional barrel-shaped shell of the spiral feeding machine is made into the polygonal shell with the section being the polygonal plate-shaped side walls, when the spiral blades rotate, materials can be effectively prevented from rotating in situ under the blocking of the multiple plate-shaped side walls in the polygonal shell, and light and thin materials can be smoothly conveyed along with the spiral blades; and one end of the rotating shaft is directly connected with the power output shaft combined by the motor and the speed reducer through the elastic coupling, so that the whole structure is compact, the conversion of kinetic energy is improved, and the transmission working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of feeding machine technology, and specifically to a screw feeder that can improve conveying efficiency. Background Technology

[0002] Screw conveyors utilize spiral blades to transport materials and are used in various material conveying applications. However, if the material being conveyed is thin or light, such as torn plastic film, it can easily spin in place within the cylindrical feeding chamber due to the spiral blades, preventing it from being conveyed properly. This stagnant material slides down to the bottom of the spiral blades, reducing conveying efficiency. Previously, baffles were added axially along the circumference of the inner wall of the feeding chamber to prevent spinning. However, this not only increases the diameter of the chamber but also leads to material accumulation on both sides of the baffles, further reducing conveying efficiency. Because the rotating shaft of the screw conveyor is relatively long, the two ends of the shaft are prone to deviating from the axis and wobbling. Therefore, the screw conveyor is connected to the power unit through a chain for transmission. This allows transmission to be achieved even when the rotating shaft is wobbling, but it reduces the conversion of kinetic energy and the transmission efficiency is low. When the conveyor is conveying upwards, the feed inlet is at the lower end, and the bearing at the lower end is set in the feeding chamber. Many sealing barriers need to be added to the bearing, but they cannot effectively prevent various materials and liquid components such as water in the materials from entering the bearing and contaminating it, causing the bearing to be damaged, rendering the conveyor unable to work, and reducing the service life of the conveyor. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a screw conveyor that can effectively prevent the material from spinning in place when conveying thin materials, thereby improving the conveying efficiency. In addition, it can further solve the problems of easy damage to bearings and low transmission efficiency in screw conveyors.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A screw conveyor that can improve conveying efficiency includes a rotating shaft and a power assembly for driving its rotation, a housing sleeved on the outside of the rotating shaft, helical blades axially surrounding the outer circumference of the rotating shaft, the outer circumferential edge of the helical blades being close to the inner sidewall of the housing, a feeding chamber inside the housing, a feed inlet at one end of the housing, a discharge outlet at the other end of the housing, and multiple support legs at the bottom of the housing. The radial cross-sectional profile of the housing is a bent polygon.

[0006] As a preferred embodiment, the polygonal cross-section of the outer shell is selected from a range of 8-12 regular polygons.

[0007] As a preferred embodiment, the upper side of the outer casing is provided with an opening, which is covered with an openable cover.

[0008] In a preferred embodiment, the two axial ends of the housing are respectively covered with end caps, and a first bracket and a second bracket are respectively fixed on the outer surfaces of the two end caps that are far apart. The two ends of the rotating shaft extend out of the two end caps and into the interior of the first bracket and the second bracket respectively. A first bearing is provided in the first bracket, and the first bearing is sleeved on the rotating shaft and close to the end cap. The outer end of the rotating shaft in the first bracket is connected to the power assembly for transmission. A first sealing assembly is provided on the rotating shaft in the first bracket, and the first sealing assembly is located between the end cap and the first bearing. A second bearing is provided on the outer end surface of the second bracket, and the second bearing is sleeved on the rotating shaft. A second sealing assembly is provided on the rotating shaft in the second bracket at the point where it passes through the end cap.

[0009] In a preferred embodiment, the power assembly includes a motor and a reducer connected by a drive. The reducer is fixed on the outer side of the first bracket, and the power output shaft of the reducer extends into the first bracket. The power output shaft is coaxial with and close to the rotating shaft, and the power output shaft and the rotating shaft are connected by a flexible coupling.

[0010] In a preferred embodiment, the first sealing assembly includes a baffle plate, one side of which is tightly connected to the side of the end cap, the inner circumference of which surrounds the rotating shaft, and an oil seal is used for the gap between the baffle plate and the rotating shaft.

[0011] In a preferred embodiment, the second sealing assembly includes a through cover, asbestos packing, and a clamping disc. The through cover is disposed at the annular gap through which the rotating shaft passes. The flange of the through cover is tightly connected to the side of the end cover away from the feeding chamber. A gap is left between the inner circumference of the through cover and the rotating shaft, and the asbestos packing is installed in the gap. The inner circumference of the through cover near the feeding chamber extends radially toward the outer circumference of the rotating shaft, forming a stepped surface that prevents the asbestos packing from falling into the feeding chamber. One end of the clamping disc for pressing against the asbestos packing is inserted into the gap opening on the side of the through cover away from the feeding chamber. The flange of the other end of the clamping disc is connected to the through cover by bolts.

[0012] In a preferred embodiment, the rotating shaft is inclined, the discharge port is at one end of the housing near the first support, the inlet is at one end of the housing near the second support, and the inlet is inclined from bottom to top from the discharge port.

[0013] As a preferred embodiment, a water filter box is provided at the bottom of the feed inlet on the outer shell, a water outlet is provided on the side of the water filter box near the bottom, and a filter screen is provided inside the water filter box near the spiral blades.

[0014] The beneficial effects of this utility model are as follows: The traditional cylindrical outer shell of the screw conveyor is made into a polygonal shell with a polygonal cross-section, thus having multiple flat sidewalls. The screw blades are close to the inner circle contour of the polygonal shell and can rotate smoothly. When the screw blades rotate, the material is blocked by several flat sidewalls in the polygonal shell, which can effectively prevent the material from spinning in place, allowing even thin materials to be smoothly conveyed with the screw blades, thereby effectively improving the conveying efficiency. One end of the rotating shaft is directly connected to the power output shaft of the motor and reducer combination through a flexible coupling, which not only makes the overall structure compact, but also improves the conversion of kinetic energy and the transmission efficiency. The bearings at both ends of the rotating shaft are set on the outside of the feeding chamber and fixed by brackets, which reduces the chance of material, especially liquids such as water, entering the bearings. The gap between the rotating shaft and the cover plate at the feed inlet end is plugged with asbestos packing and then compacted with a pressure disc. The sealing structure is easy to achieve, the sealing effect is good, the probability of bearing contamination and damage is reduced, and the overall service life is improved. Attached Figure Description

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0017] Figure 2 This is a side view of the present invention;

[0018] Figure 3 for Figure 2 A magnified view of part A in the image;

[0019] Figure 4 for Figure 2 A magnified view of part B in the image;

[0020] Figure 5 for Figure 2 Cross-sectional view along the middle CC;

[0021] Figures 1-5 Explanation of reference numerals in the attached diagram: 1. Motor; 2. Reducer; 3. First support; 4. Discharge port; 5. Support leg; 6. Cover plate; 7. Housing; 8. Water filter tank; 9. Water outlet; 10. Second support; 11. Feed inlet; 12. Rotating shaft; 13. Spiral blade; 14. Power output shaft; 15. Flexible coupling; 16. First bearing; 17. End cover; 18. Second bearing; 19. Pressing disc; 20. Asbestos packing; 21. Filter screen; 22. Through cover; 23. Baffle plate. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0023] This utility model describes a screw conveyor that can improve conveying efficiency. See also: Figures 1-5 As shown, it includes a rotating shaft 12 and a power assembly that drives its rotation, a housing 7 sleeved on the outside of the rotating shaft 12, a spiral blade 13 circumferentially surrounding the outer circumference of the rotating shaft 12, the outer circumferential edge of the spiral blade 13 being close to the inner sidewall of the housing 7, a feeding chamber inside the housing 7, a feed inlet 11 at one end of the housing 7, a discharge outlet 4 at the other end of the housing 7, and multiple support legs 5 at the bottom of the housing 7, the radial cross-sectional profile of the housing 7 being a bent polygon.

[0024] Specifically, the outer shell 7 of the feeder is designed as a polygon. This polygonal shell with bends has multiple flat sidewalls. When the rotating shaft 12 drives the spiral blades 13 to feed the material, when the material comes into contact with the inner sidewall of the outer shell 7, compared with the smooth circumferential surface, the flat inner wall of each bend can block the material to a certain extent. This can effectively prevent thin materials from spinning in place, and make it easier for the material to enter the spiral feeding area of ​​the spiral blades 13 when the spiral blades 13 rotate, so as to continuously and efficiently convey the material.

[0025] The optimal range for the polygonal cross-section of the outer shell 7 is 8-12 regular polygons. Too few sides will make the structure too abrupt, with sharp edges, and materials will easily get stuck in the corners. Too many sides will make the polygon closer to a circle, which is not conducive to material blocking. The appropriate number of sides of the polygon can be selected according to the diameter of the outer shell 7.

[0026] like Figure 1 The outer casing 7 has an opening on its upward-facing side, which is covered by an openable cover plate 6. Opening the cover plate 6 to expose the outer casing 7 facilitates maintenance and troubleshooting, and also allows for easy observation of the feeding situation inside the feeding chamber.

[0027] like Figure 2The outer casing 7 has end caps 17 covering its two axial ends. A first bracket 3 and a second bracket 10 are fixed to the outer surfaces of the two end caps 17 that are far apart. The two ends of the rotating shaft 12 pass through the two end caps 17 and extend into the interior of the first bracket 3 and the second bracket 10, respectively. A first bearing 16 is provided in the first bracket 3. The first bearing 16 is sleeved on the rotating shaft 12 and close to the end cap 17. The outer end of the rotating shaft 12 in the first bracket 3 is connected to the power assembly for transmission. A first sealing assembly is provided on the rotating shaft 12 in the first bracket 3. The first sealing assembly is located between the end cap 17 and the first bearing 16. A second bearing 18 is provided on the outer end surface of the second bracket 10. The second bearing 18 is sleeved on the rotating shaft 12. A second sealing assembly is provided on the rotating shaft 12 in the second bracket 10 where it passes through the end cap 17. The first bearing 16 and the second bearing 18 at both ends of the rotating shaft 12 are set outside the feeding chamber and fixed inside the first bracket 3 and the second bracket 10 respectively. This allows the first bearing 16 and the second bearing 18 that support the rotation to be kept away from the material, reducing contamination, increasing the service life of the first bearing 16 and the second bearing 18, and improving the service life of the feeder.

[0028] like Figure 3 The power assembly includes a motor 1 and a reducer 2 connected by a drive mechanism. The reducer 2 is fixed to the outer side of the first bracket 3. The power output shaft 14 of the reducer 2 extends into the first bracket 3. The power output shaft 14 is coaxial with and close to the rotating shaft 12. The power output shaft 14 and the rotating shaft 12 are connected by a flexible coupling 15. The flexible coupling 15 contains rubber, which can provide a certain degree of cushioning and elasticity to accommodate the swaying of the rotating shaft 12. The motor 1 and the reducer 2 are directly connected to the rotating shaft 12, thereby improving the energy conversion efficiency.

[0029] The first sealing assembly includes a baffle plate 23, one side of which is tightly connected to the side of the end cover 17. The inner circumference of the baffle plate 23 surrounds the rotating shaft 12, and the gap between the baffle plate 23 and the rotating shaft 12 is sealed with an oil seal. This end is close to the discharge port 4, with less material contact, and a general seal can achieve a good sealing and blocking effect.

[0030] like Figure 4The second sealing assembly includes a through cover 22, asbestos packing 20, and a clamping disc 19. The through cover 22 is positioned at the annular gap through which the rotating shaft 12 passes the end cover 17. The flange of the through cover 22 is tightly connected to the side of the end cover 17 away from the feeding chamber. A gap is left between the inner circumference of the through cover 22 and the rotating shaft 12, and the asbestos packing 20 is installed in this gap. The inner circumference of the through cover 22 near the feeding chamber extends radially toward the outer circumference of the rotating shaft 12, forming a stepped surface that prevents the asbestos packing 20 from falling into the feeding chamber. One end of the clamping disc 19, which is used to press against the asbestos packing 20, extends into the gap opening on the side of the through cover 22 away from the feeding chamber. The flange of the other end of the clamping disc 19 is bolted to the through cover 22. Adjusting the distance between the clamping disc 19 and the through cover 22 can adjust the tightness of the asbestos packing 20 in the gap of the inner circumference of the through cover 22, thereby achieving a sealing effect.

[0031] like Figure 1 The rotating shaft 12 is inclined, the discharge port 4 is on the outer casing 7 near the first support 3, and the feed port 11 is on the outer casing 7 near the second support 10, with the feed port 11 inclined from bottom to top to the discharge port 4. The feeder is generally inclined, with one end of the feed port 11 directly contacting the material. Therefore, the second bearing 18 needs to be placed outside the feeding chamber and sealed with asbestos packing 20 to isolate it from material contamination, especially water and other liquid components in the material, thus improving its service life.

[0032] like Figure 2 A water filter tank 8 is provided at the bottom of the feed inlet 11 on the outer shell 7. A water outlet 9 is provided on the side of the water filter tank 8 near the bottom. A filter screen 21 is provided inside the water filter tank 8 near the spiral blades 13. The filter screen 21 blocks the material from being conveyed in the feeding chamber, and water flows out from the water filter tank 8. Due to gravity, the water in the material flows downward, and the water filter tank 8 can temporarily store the water and then discharge it from the water outlet 9 at regular intervals.

[0033] The working process of this utility model is as follows:

[0034] like Figure 1 Multiple support legs 5 are arranged in order from low to high, and the screw feeder is set at an angle. The feed port 11 opens upward and is close to the lower end, the discharge port 4 opens downward and is close to the upper end, and the motor 1 and reducer 2 are set at the upper end.

[0035] During feeding, motor 1 and reducer 2 drive rotating shaft 12 to rotate. Material falls in from feed port 11. Spiral blade 13 drives material upward in the outer shell 7. The material is smoothly and continuously transported by spiral blade 13 under the obstruction of the polygonal outer shell 7 with multiple flat sidewalls. Material falls from discharge port 4 to the next station. Oil seal is used between the upper rotating shaft 12 and end cover 17, so the chance of material reaching the top is relatively small.

[0036] The lower end of the rotating shaft 12 can be adjusted by adjusting the bolts of the clamping disc 19 to adjust the degree to which the clamping disc 19 presses against the asbestos packing 20, thus ensuring a sealing effect.

[0037] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A spiral feeder capable of improving the conveying efficiency, characterized in that, The utility model relates to a kind of spiral feeders, including rotating shaft (12) and the power component of driving its rotation, the shell (7) of being set outside rotating shaft (12), the outer circumference of rotating shaft (12) is surrounded with helical blade (13) along the axis, the outer circumferential edge of helical blade (13) is close to the inner side wall of shell (7), and the shell (7) is feeding cavity inside, the one end of shell (7) is provided with feeding port (11), the other end of shell (7) is provided with discharge port (4), and the bottom of shell (7) is further provided with multiple supporting legs (5), and the radial cross-sectional profile of the shell (7) is bent polygon.

2. The spiral feeder of claim 1, wherein The polygonal cross-section of the shell (7) is selected from the range of 8-12 regular polygons.

3. The spiral feeder of claim 1, wherein the spiral feeder is characterized by: The upward side of the shell (7) is provided with an opening, and the opening is covered with an openable cover plate (6).

4. The spiral feeder of claim 2 or 3, wherein The axial two ends of the shell (7) are respectively covered with end covers (17), the outer sides of the two end covers (17) away from each other are respectively fixed with a first bracket (3) and a second bracket (10), the two ends of the rotating shaft (12) respectively pass out of the two end covers (17) and respectively extend into the interiors of the first bracket (3) and the second bracket (10), the first bracket (3) is provided with a first bearing (16), the first bearing (16) is sleeved on the rotating shaft (12) and close to the end cover (17), the outer end of the rotating shaft (12) in the first bracket (3) is connected with the power component transmission, the rotating shaft (12) in the first bracket (3) is provided with a first sealing assembly, the first sealing assembly is arranged between the end cover (17) and the first bearing (16), the outer side end face of the second bracket (10) is provided with a second bearing (18), the second bearing (18) is sleeved on the rotating shaft (12), and the rotating shaft (12) in the second bracket (10) is provided with a second sealing assembly at the position passing through the end cover (17).

5. The spiral feeder of claim 4, wherein the spiral feeder is configured to rotate in a clockwise direction. The power component includes a motor (1) and a speed reducer (2) connected in transmission, the speed reducer (2) is fixed on the outer end side face of the first bracket (3), the power output shaft (14) of the speed reducer (2) extends into the first bracket (3), the power output shaft (14) is coaxial with the rotating shaft (12) close to, and the power output shaft (14) and the rotating shaft (12) are connected through an elastic coupling (15).

6. The spiral feeder of claim 4, wherein The first sealing assembly includes a baffle disc (23), one side face of the baffle disc (23) is tightly connected to the side face of the end cover (17), the inner circumference of the baffle disc (23) is close to the rotating shaft (12), and the gap between the baffle disc (23) and the rotating shaft (12) adopts an oil seal.

7. The spiral feeder of claim 4, wherein the spiral feeder is characterized by: The second sealing assembly comprises a transparent cover (22), an asbestos packing (20) and a pressing disc (19), the transparent cover (22) is arranged at the annular gap through which the rotating shaft (12) penetrates the end cover (17), the flange surface of the transparent cover (22) is tightly connected to the side surface of the end cover (17) away from the feeding cavity, the inner circumference of the transparent cover (22) leaves a gap with the rotating shaft (12), the gap is filled with the asbestos packing (20), the inner circumference of the transparent cover (22) close to the feeding cavity extends along the radial direction to the outer circumferential surface of the rotating shaft (12) to form a step surface for blocking the asbestos packing (20) from falling into the feeding cavity, one end of the pressing disc (19) for pressing the asbestos packing (20) is inserted into the gap opening of the transparent cover (22) away from the feeding cavity, and the flange surface of the other end of the pressing disc (19) is connected to the transparent cover (22) through bolts.

8. The spiral feeder of claim 4, wherein the spiral feeder is characterized by: The rotating shaft (12) is arranged obliquely, the discharge port (4) is arranged on the shell (7) close to one end of the first support (3), the feeding port (11) is arranged on the shell (7) close to one end of the second support (10), and the feeding port (11) is obliquely arranged from the bottom to the top to the discharge port (4).

9. The spiral feeder of claim 2 or 3, wherein The shell (7) is provided with a water filter tank (8) at the bottom of the feeding port (11), the side surface of the water filter tank (8) close to the bottom is provided with a water outlet (9), and the inside of the water filter tank (8) close to the spiral blade (13) is provided with a filter screen (21).

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