A screw press equipped with a back pressure device

Abstract

The application relates to the field of spiral extrusion equipment, in particular to a spiral press provided with a back pressure device, which comprises a feeding bin, a pressing bin and a spiral conveying shaft, conveying blades in a spiral shape are arranged on the spiral conveying shaft, the spiral conveying shaft rotates through the feeding bin and the pressing bin in sequence, a driving element for driving the spiral conveying shaft to rotate is arranged on the feeding bin, a back pressure ring plate and a screen cylinder are coaxially arranged on the spiral conveying shaft, the screen cylinder is rotationally arranged in the pressing bin, a rotating element for driving the screen cylinder to rotate is arranged on the pressing bin, the back pressure ring plate is located on the side of the screen cylinder away from the feeding bin, a pressing rod is rotationally arranged on the pressing bin, a back pressure element is arranged on the pressing rod, the back pressure element is used for pressing the back pressure ring plate against one end of the screen cylinder away from the feeding bin, a brush roller is rotationally arranged in the pressing bin, bristles on the brush roller are used for abutting against the outer side wall of the screen cylinder, and a cleaning element for driving the brush roller to rotate is arranged on the pressing bin. The application has the effect of improving the solid-liquid separation efficiency of the screen cylinder.

Description

Technical Field

[0001] This application relates to the field of screw extrusion equipment, and more particularly to a screw press equipped with a back pressure device. Background Technology

[0002] The screw press is a type of equipment widely used in food, chemical, pharmaceutical, environmental protection and other industries. Its working principle is mainly to squeeze the material through the screw blades on the screw shaft. The screw press is equipped with a back pressure head that can block the discharge port. While the screw shaft squeezes the material, the material squeezes the back pressure head. When the squeezing pressure of the material is greater than the back pressure of the back pressure head, the back pressure head retracts and the material is discharged from the gap between the back pressure head and the discharge port.

[0003] Currently, existing screw presses typically use screens to separate solids and liquids. However, the solid particles in the material vary in size, so after prolonged operation, the screens are easily clogged by solid particles, resulting in poor solid-liquid separation and other shortcomings. Utility Model Content

[0004] To address the problem of solid particles in materials easily clogging the screen cylinder, this application provides a screw press equipped with a back pressure device.

[0005] The screw press equipped with a back pressure device provided in this application adopts the following technical solution: A screw press equipped with a back pressure device includes a feeding bin, a pressing bin, and a screw conveyor shaft. Helical conveying blades are wound around the screw conveyor shaft, which rotates sequentially through the feeding bin and the pressing bin. A drive unit is provided on the feeding bin to drive the screw conveyor shaft. A back pressure ring plate and a screen cylinder are coaxially sleeved on the screw conveyor shaft. The screen cylinder is rotatably disposed within the pressing bin. A rotating component is provided on the pressing bin to drive the screen cylinder. The back pressure ring plate is located on the side of the screen cylinder facing away from the feeding bin. A pressure rod is rotatably disposed on the pressing bin, and a back pressure component is provided on the pressure rod. The back pressure component is used to press the back pressure ring plate against the end of the screen cylinder facing away from the feeding bin. A brush roller is rotatably disposed within the pressing bin, with its axis perpendicular to the axis of the screen cylinder. The bristles on the brush roller abut against the outer wall of the screen cylinder. A cleaning component is provided on the pressing bin to drive the brush roller to rotate.

[0006] By adopting the above technical solution, the driving component drives the screw conveyor shaft to rotate the conveyor blades, and the material enters from the feed hopper. The conveyor blades on the screw conveyor shaft transport the material to the screen cylinder in the pressing chamber. The liquid flows out from the mesh on the screen cylinder, while the solid material is continuously squeezed towards the back pressure ring plate. When the squeezed material overcomes the clamping force of the back pressure ring plate, the squeezed material is discharged from the end of the screen cylinder away from the feed hopper. During this process, the cleaning component drives the brush roller to rotate and clean the clogged mesh on the screen cylinder, while the rotating component drives the screen cylinder to rotate, so that the circumference of the screen cylinder is cleaned, thereby improving the solid-liquid separation efficiency of the screen cylinder.

[0007] Optionally, the driving component includes a gearbox and a drive motor mounted on the gearbox. The gearbox is mounted on the feed hopper, and the screw conveyor shaft is coaxially mounted on the output shaft of the gearbox.

[0008] By adopting the above technical solution, the gearbox reduces the speed of the drive motor output shaft, thereby giving the screw conveyor shaft a larger torque force, which is beneficial to improving the extrusion effect on the material.

[0009] Optionally, the rotating component includes a toothed ring coaxially disposed at the end of the screen cylinder, a torque shaft rotatably disposed on the pressing chamber, a rotating gear meshing with the toothed ring disposed on the torque shaft, a first pulley coaxially disposed on the spiral conveying shaft, a second pulley coaxially disposed on the torque shaft, and a belt is wound together between the first pulley and the second pulley.

[0010] By adopting the above technical solution, the spiral conveyor shaft drives the second pulley to rotate in the same direction through the first pulley and belt. The second pulley drives the rotating gear to rotate in the same direction through the torque shaft. The rotating gear drives the screen cylinder to rotate in the opposite direction through the gear ring. During this process, the solid particles in the mesh on the circumference of the screen cylinder will be cleaned by the bristles on the brush roller.

[0011] Optionally, the cleaning component includes a mounting plate disposed on the pressing chamber, a drive shaft rotatably disposed on the mounting plate, a brush roller coaxially sleeved on the drive shaft, and a gear set for transmitting torque disposed between the drive shaft and the torque shaft.

[0012] By adopting the above technical solution, the torque shaft transmits torque to the drive shaft through the gear set, and the drive shaft drives the brush roller to rotate, thereby continuously cleaning the mesh holes on the outer circumferential wall of the rotating screen cylinder.

[0013] Optionally, the pressing chamber is provided with an isolation plate and an isolation cover, the gear ring and the rotating gear are both located between the isolation plate and the inner wall of the pressing chamber, the screen cylinder rotates through the isolation plate, and the gear set is located between the isolation cover and the mounting plate.

[0014] By adopting the above technical solution, the possibility of solid particles discharged from the mesh of the sieve cylinder accidentally falling onto the gear ring, rotating gear, and gear set, thereby causing damage to the gear transmission, is reduced.

[0015] Optionally, the back pressure member includes a pressure rod disposed on the pressure rod, and a counterweight is bolted to the pressure rod.

[0016] By adopting the above technical solution, the pressure rod is pressed against the back pressure ring plate under the gravity of the counterweight.

[0017] Optionally, a back pressure wheel is rotatably mounted on the pressure rod, and the back pressure wheel presses against the back pressure ring plate.

[0018] By adopting the above technical solution, the back pressure roller reduces the possibility of mechanical self-locking between the pressure rod and the back pressure ring plate.

[0019] Optionally, multiple sets of brush rollers are arranged along the axial direction of the screen cylinder.

[0020] By adopting the above technical solution, the cleaning range of the mesh holes in the screen cylinder is increased, which is conducive to further improving the solid-liquid separation efficiency of the screen cylinder.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The drive unit drives the screw conveyor shaft to rotate the conveyor blades, and the material enters from the feed hopper. The conveyor blades on the screw conveyor shaft transport the material to the screen cylinder in the pressing chamber. The liquid flows out from the mesh on the screen cylinder, while the solid material is continuously squeezed towards the back pressure ring plate. When the squeezed material overcomes the clamping force of the back pressure ring plate, the squeezed material is discharged from the end of the screen cylinder away from the feed hopper. During this process, the cleaning unit drives the brush roller to rotate and clean the clogged mesh on the screen cylinder, while the rotating unit drives the screen cylinder to rotate, so that the circumference of the screen cylinder is cleaned, thereby improving the solid-liquid separation efficiency of the screen cylinder. 2. The screw conveyor shaft drives the second pulley to rotate in the same direction through the first pulley and belt. The second pulley drives the rotating gear to rotate in the same direction through the torque shaft. The rotating gear drives the screen cylinder to rotate in the opposite direction through the gear ring. During this process, the solid particles in the mesh on the circumferential direction of the screen cylinder will be cleaned by the bristles on the brush roller. 3. The torque shaft transmits torque to the drive shaft through the gear set. The drive shaft drives the brush roller to rotate, thereby continuously cleaning the mesh on the outer circumferential wall of the rotating screen cylinder. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0023] Figure 2This is a cross-sectional view used in the embodiments of this application to illustrate the positional relationship between the rotating gear, belt, and screw conveyor shaft.

[0024] Figure 3 This is a structural schematic diagram illustrating the positional relationship between the mounting plate, brush roller, and belt in the embodiments of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Feed hopper; 2. Pressing hopper; 3. Screw conveyor shaft; 4. Conveyor blades; 5. Drive component; 51. Gearbox; 52. Drive motor; 6. Back pressure ring plate; 7. Screen cylinder; 8. Rotating component; 81. Gear ring; 82. Torque shaft; 83. Rotating gear; 84. First pulley; 85. Second pulley; 86. Belt; 9. Pressure rod; 10. Back pressure component; 101. Pressure rod; 102. Counterweight; 11. Brush roller; 12. Cleaning component; 121. Mounting plate; 122. Drive shaft; 123. Gear set; 13. Isolation plate; 14. Isolation cover; 15. Back pressure roller. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0027] This application discloses a screw press equipped with a back pressure device.

[0028] Reference Figure 1 A screw press equipped with a back pressure device includes a feed bin 1, a pressing bin 2 and a screw conveyor shaft 3. The screw conveyor shaft 3 is wound with helical conveying blades 4. The screw conveyor shaft 3 rotates through the feed bin 1 and the pressing bin 2 in sequence. The feed bin 1 is provided with a drive component 5 that drives the screw conveyor shaft 3 to rotate.

[0029] Reference Figure 1 The drive unit 5 includes a reduction gearbox 51 and a drive motor 52 bolted to the reduction gearbox 51. The reduction gearbox 51 is bolted to the feed hopper 1, and the screw conveyor shaft 3 is coaxially bolted to the output shaft of the reduction gearbox 51.

[0030] Reference Figure 1 , Figure 2 and Figure 3 A back pressure ring plate 6 and a screen cylinder 7 are coaxially sleeved on the screw conveyor shaft 3. The screen cylinder 7 is sleeved on the outside of the conveyor blade 4 and is rotatably connected to the pressing chamber 2. A rotating component 8 that drives the screen cylinder 7 to rotate is arranged on the pressing chamber 2.

[0031] Reference Figure 1 , Figure 2 and Figure 3The rotating component 8 includes a toothed ring 81 coaxially welded to the end of the screen cylinder 7. A torque shaft 82 is rotatably connected to the pressing chamber 2. A rotating gear 83 that meshes with the toothed ring 81 is bolted to the torque shaft 82. An isolation plate 13 is bolted inside the pressing chamber 2. The end of the screen cylinder 7 rotates through the isolation plate 13. The toothed ring 81 and the rotating gear 83 are both located between the isolation plate 13 and the inner wall of the pressing chamber 2.

[0032] Reference Figure 2 and Figure 3 There are no mesh holes in the area of ​​the screen cylinder 7 where the toothed ring 81 between the isolation plate 13 and the pressing chamber 2 is located. A first pulley 84 is coaxially bolted to the screw conveyor shaft 3, and a second pulley 85 is coaxially bolted to the torque shaft 82. A belt 86 is wound together between the first pulley 84 and the second pulley 85.

[0033] The drive motor 52 drives the screw conveyor shaft 3 to rotate through the reduction gearbox 51. The material enters from the feed bin 1, and the conveying blades 4 on the screw conveyor shaft 3 will convey the material to the screen cylinder 7 in the pressing bin 2. A large amount of liquid in the material will flow out through the mesh on the screen cylinder 7. At the same time, the solid material will be continuously squeezed by the conveying blades 4 towards the back pressure ring plate 6, and the squeezed liquid will flow out through the mesh on the screen cylinder 7.

[0034] Reference Figure 2 and Figure 3 The back pressure ring plate 6 is located on the side of the screen cylinder 7 facing away from the feed bin 1. The pressing bin 2 is rotatably connected to the pressure rod 9, and the pressure rod 9 is rotatably connected to the back pressure wheel 15. The pressure rod 9 is provided with a back pressure component 10, which is used to press the back pressure wheel 15 against the end of the screen cylinder 7 facing away from the feed bin 1.

[0035] Reference Figure 3 The back pressure member 10 includes a pressure rod 101 welded to the pressure rod 9. The pressure rod 101 has an L-shaped cross-section, and a counterweight 102 is bolted to the end of the pressure rod 101 away from the pressure rod 9.

[0036] Reference Figure 1 , Figure 2 and Figure 3 Multiple sets of brush rollers 11 are rotatably arranged inside the pressing chamber 2. The multiple sets of brush rollers 11 are evenly arranged along the axial direction of the screen cylinder 7. The axis of the brush rollers 11 is perpendicular to the axis of the screen cylinder 7. The bristles on the brush rollers 11 are used to abut against the outer wall of the screen cylinder 7. A cleaning component 12 that drives the brush rollers 11 to rotate is arranged on the pressing chamber 2.

[0037] Reference Figure 1 , Figure 2 and Figure 3The cleaning component 12 includes a mounting plate 121 bolted to the pressing chamber 2. A drive shaft 122 is rotatably connected to the mounting plate 121. The brush roller 11 is coaxially sleeved on the drive shaft 122. A gear set 123 for transmitting torque is arranged between the drive shaft 122 and the torque shaft 82. The gear set 123 consists of multiple gears and shafts in the prior art. An isolation cover 14 is bolted to the mounting plate 121 inside the pressing chamber 2. The gear set 123 is located between the isolation cover 14 and the mounting plate 121.

[0038] During the rotation of the screw conveyor shaft 3, the screw conveyor shaft 3 drives the second pulley 85 to rotate in the same direction through the first pulley 84 and the belt 86. The second pulley 85 drives the rotating gear 83 to rotate in the same direction through the torque shaft 82. The rotating gear 83 drives the screen cylinder 7 to rotate in the opposite direction through the gear ring 81. At the same time, the gear set 123 transmits the torque on the torque shaft 82 to the transmission shaft 122. The transmission shaft 122 drives the brush roller 11 to rotate continuously, thereby removing the solid particles blocked on the mesh of the screen cylinder 7.

[0039] When the extruded material overcomes the clamping force of the back pressure ring plate 6, the pressure ring plate pushes the pressure rod 9 to rotate, and the extruded material will be discharged from the end of the screen cylinder 7 facing away from the feed bin 1, thereby achieving the effect of continuous extrusion.

[0040] The implementation principle of a screw press equipped with a back pressure device in this application embodiment is as follows: the drive motor 52 drives the screw conveyor shaft 3 to rotate through the reduction gearbox 51. The material enters from the feed bin 1, and the conveying blades 4 on the screw conveyor shaft 3 will convey the material to the screen cylinder 7 in the pressing bin 2. A large amount of liquid in the material will flow out through the mesh on the screen cylinder 7. At the same time, the solid material will be continuously squeezed by the conveying blades 4 towards the back pressure ring plate 6, and the squeezed liquid will flow out through the mesh on the screen cylinder 7.

[0041] During the rotation of the screw conveyor shaft 3, the screw conveyor shaft 3 drives the second pulley 85 to rotate in the same direction through the first pulley 84 and the belt 86. The second pulley 85 drives the rotating gear 83 to rotate in the same direction through the torque shaft 82. The rotating gear 83 drives the screen cylinder 7 to rotate in the opposite direction through the gear ring 81. At the same time, the gear set 123 transmits the torque on the torque shaft 82 to the transmission shaft 122. The transmission shaft 122 drives the brush roller 11 to rotate continuously, thereby removing the solid particles blocked on the mesh of the screen cylinder 7.

[0042] When the extruded material overcomes the clamping force of the back pressure ring plate 6, the pressure ring plate pushes the pressure rod 9 to rotate, and the extruded material will be discharged from the end of the screen cylinder 7 facing away from the feed bin 1, thereby achieving the effect of continuous extrusion.

[0043] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A screw press equipped with a back pressure device, characterized in that: The device includes a feeding hopper (1), a pressing chamber (2), and a screw conveyor shaft (3). The screw conveyor shaft (3) is wound with helical conveying blades (4). The screw conveyor shaft (3) rotates sequentially through the feeding hopper (1) and the pressing chamber (2). The feeding hopper (1) is equipped with a driving component (5) for rotating the screw conveyor shaft (3). A back pressure ring plate (6) and a screen cylinder (7) are coaxially mounted on the screw conveyor shaft (3). The screen cylinder (7) is rotatably disposed within the pressing chamber (2). The pressing chamber (2) is equipped with a rotating component (8) for rotating the screen cylinder (7). The back pressure ring plate (6) is positioned... On the side of the screen cylinder (7) facing away from the feed bin (1), a pressure rod (9) is rotatably mounted on the pressing bin (2), and a back pressure member (10) is mounted on the pressure rod (9). The back pressure member (10) is used to press the back pressure ring plate (6) against the end of the screen cylinder (7) facing away from the feed bin (1). A brush roller (11) is rotatably mounted inside the pressing bin (2). The axis of the brush roller (11) is perpendicular to the axis of the screen cylinder (7). The bristles on the brush roller (11) are used to abut against the outer wall of the screen cylinder (7). A cleaning member (12) is mounted on the pressing bin (2) to drive the brush roller (11) to rotate.

2. A screw press equipped with a back pressure device according to claim 1, characterized in that: The drive unit (5) includes a reduction gearbox (51) and a drive motor (52) mounted on the reduction gearbox (51). The reduction gearbox (51) is mounted on the feed hopper (1), and the screw conveyor shaft (3) is coaxially mounted on the output shaft of the reduction gearbox (51).

3. A screw press equipped with a back pressure device according to claim 1, characterized in that: The rotating component (8) includes a toothed ring (81) coaxially disposed at the end of the screen cylinder (7), a torque shaft (82) rotatably disposed on the pressing chamber (2), a rotating gear (83) meshing with the toothed ring (81) disposed on the torque shaft (82), a first pulley (84) coaxially disposed on the screw conveyor shaft (3), a second pulley (85) coaxially disposed on the torque shaft (82), and a belt (86) is wound together between the first pulley (84) and the second pulley (85).

4. A screw press equipped with a back pressure device according to claim 3, characterized in that: The cleaning component (12) includes a mounting plate (121) disposed on the pressing chamber (2), a drive shaft (122) is rotatably disposed on the mounting plate (121), the brush roller (11) is coaxially sleeved on the drive shaft (122), and a gear set (123) for transmitting torque is disposed between the drive shaft (122) and the torque shaft (82).

5. A screw press equipped with a back pressure device according to claim 4, characterized in that: The pressing chamber (2) is provided with an isolation plate (13) and an isolation cover (14). The gear ring (81) and the rotating gear (83) are both located between the isolation plate (13) and the inner wall of the pressing chamber (2). The screen cylinder (7) rotates through the isolation plate (13). The gear set (123) is located between the isolation cover (14) and the mounting plate (121).

6. A screw press equipped with a back pressure device according to claim 1, characterized in that: The back pressure member (10) includes a pressure rod (101) disposed on the pressure rod (9), and a counterweight (102) is bolted to the pressure rod (101).

7. A screw press equipped with a back pressure device according to claim 6, characterized in that: A back pressure wheel (15) is rotatably mounted on the pressure rod (9), and the back pressure wheel (15) presses against the back pressure ring plate (6).

8. A screw press equipped with a back pressure device according to claim 1, characterized in that: Multiple sets of brush rollers (11) are arranged along the axial direction of the screen cylinder (7).

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