A scraper centrifuge

Abstract

A scraper centrifuge includes a centrifuge and a scraper device. The scraper device is fixedly installed on the centrifuge and scrapes the centrifuge drum to ensure continuous centrifugation. The scraper device includes a scraper lifting mechanism, a scraper assembly, and a crushing mechanism. The scraper lifting mechanism is fixedly installed on the centrifuge, and the scraper assembly is connected to the scraper lifting mechanism. The scraper lifting mechanism drives the scraper assembly to rise and fall. During centrifugation, the scraper assembly is raised to prevent the crushing mechanism from colliding with the centrifuge drum. The crushing mechanism is installed inside the scraper assembly and extends from the lower end of the scraper assembly. The scraper assembly scrapes the centrifuge drum, and the crushing mechanism crushes the scraped residue, thereby refining the residue and facilitating its discharge from the centrifuge drum.

Description

Technical Field

[0001] This invention relates to the field of centrifuge technology, and more specifically to a scraper centrifuge. Background Technology

[0002] The scraper discharge centrifuge can automatically perform feeding, separation, washing, dewatering, liquid discharge, unloading, and screen washing processes at full speed. It features a novel structure, stable operation, high degree of automation, low labor intensity, large production capacity, good washing effect, and low filter cake moisture content. It is suitable for separating suspensions containing solid particles larger than 0.015mm and with a concentration range of 25-60%, and is applicable to industries such as chemical, food, and pharmaceutical.

[0003] The invention with application number CN202020807416.5 discloses a scraper centrifuge particle crushing device, which relates to the field of scraper centrifuge technology. It includes a base, a crushing mechanism and a scraper mechanism. The drive motor is installed in the inner cavity of the base, the rotating shaft is installed at the output end of the drive motor, the centrifuge cylinder is fixedly connected to the rotating shaft, the differential bearing is installed above the rotating shaft, the conical block is sleeved on the top of the rotating shaft through the differential bearing, one end of the elastic rod is fixedly connected to the inner wall of the centrifuge cylinder, the crushing plate is fixedly connected to the other end of the elastic rod, and the crushing teeth are opened at the end of the crushing plate away from the elastic rod. The above scraper centrifuge has the following shortcomings: (1) During the scraping process, the scraper is prone to causing the adhering material to adhere to the scraper, which can easily dull the scraper blade and affect the service life of the scraper and the cleanliness of the centrifuge cylinder after scraping; (2) The crushing device cannot further refine the blocky adhering material, and it is inconvenient to discharge the refined adhering material from the centrifuge cylinder. Summary of the Invention

[0004] To address the above shortcomings, the technical problem to be solved by the present invention is to provide a scraper centrifuge. This centrifuge mechanism has a better effect on scraping off the attached material, ensuring the service life of the scraper, and has the function of better refining and discharging the attached material outside the centrifuge cylinder.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] A scraper centrifuge includes a centrifuge and a scraper device. The scraper device is fixedly installed on the centrifuge and includes a scraper lifting mechanism, a scraper assembly, and a crushing mechanism. The scraper lifting mechanism is fixedly installed on the centrifuge, and the scraper assembly is connected to the scraper lifting mechanism. The crushing mechanism is installed inside the scraper assembly and extends out of the lower end of the scraper assembly. The scraper assembly includes a rotating component, a scraper shaft, a scraping blade, and a cleaning blade. The scraping blade and the cleaning blade are respectively fixedly connected to the scraper shaft. The cutting edge of the cleaning blade is in contact with the scraping blade. The scraper shaft is rotatably installed on the centrifuge through the rotating component. The rotating component drives the scraping blade to scrape the inner wall of the centrifuge, and the rotating component drives the cleaning blade to clean the scraping blade.

[0007] As a preferred embodiment of the present invention, the scraping blade and the cleaning blade are respectively arranged in an arc shape, the cleaning blade is abutted against the inner side of the cleaning blade, the cutting edge of the scraping blade extends out of the cleaning blade, and a material discharge protrusion is connected at the inlet of the cleaning blade.

[0008] As a preferred embodiment of the present invention, the rotating component includes a rotating cylinder and a connecting rod. The connecting rod is fixedly connected to the side of the scraper shaft extending out of the centrifuge. The rotating cylinder is connected to the connecting rod, and the rotating cylinder drives the scraper shaft to rotate through the connecting rod.

[0009] As a preferred embodiment of the present invention, an installation cavity is formed inside the scraper shaft, a water spray pipe is installed in the installation cavity, a water inlet pipe is fixedly connected to the scraper shaft, the water inlet pipe is connected to the water spray pipe, a water spray rib is fixedly connected to the scraper blade, a nozzle is installed on the water spray rib, the nozzle is positioned facing the contact area between the scraper blade and the cleaning blade, and is connected to the water spray pipe.

[0010] As a preferred embodiment of the present invention, the compaction mechanism includes a compaction drive, a compaction rod, and a compaction plate. The compaction rod is slidably installed inside the scraper shaft, with both ends of the compaction rod extending out of the scraper shaft. The compaction plate is fixedly connected to the lower end of the compaction rod, and the compaction drive is connected to the upper end of the compaction rod to drive the compaction rod to move up and down.

[0011] As a preferred embodiment of the present invention, the rolling rod includes a first rod portion, a second rod portion, and a third rod portion connected to each other. The rolling drive component is connected to the first rod portion, the rolling plate is fixedly connected to the third rod portion, and a limiting disc is fixedly connected to the third rod portion. A return spring is connected between the limiting disc and the scraper shaft.

[0012] As a preferred embodiment of the present invention, the rolling drive includes a rolling motor and an eccentric wheel. The rolling motor is connected to the scraper shaft through a mounting plate, the eccentric wheel is mounted on the rolling motor, and the first rod abuts against the eccentric wheel.

[0013] As a preferred embodiment of the present invention, the mounting plate is fixedly connected to the cutter shaft connecting plate of the scraper shaft, and the rolling motor and the rotating cylinder are respectively connected to the cutter shaft connecting plate through the mounting plate.

[0014] As a preferred embodiment of the present invention, the scraper lifting mechanism includes a lifting seat, a lifting cylinder, a cylinder connector, and a cutter shaft connecting plate. The lifting seat is fixedly installed on the centrifuge, the lifting cylinder is fixedly installed on the lifting seat, the lifting cylinder and the cutter shaft connecting plate are fixedly connected by the cylinder connector, and the cutter shaft connecting plate is fixedly installed on the scraper shaft.

[0015] As a preferred embodiment of the present invention, the centrifuge includes a centrifuge cylinder, an outer cylinder, and a centrifugal drive component. The centrifuge cylinder is rotatably installed inside the outer cylinder. The centrifugal drive component is connected to the centrifuge cylinder and drives the centrifuge cylinder to rotate. A guide cylinder is fixedly connected to the lower end face of the centrifuge cylinder. The side wall of the guide cylinder is inclined. A slag discharge hole is connected to the lower end face of the centrifuge cylinder.

[0016] The beneficial effects of the present invention are: (1) the scraped material is crushed by the crushing mechanism, thereby refining the material and making it easier to discharge it out of the centrifuge tube.

[0017] (2) The scraper shaft is driven to rotate by the rotating component, so as to realize the functions of scraping the centrifuge cylinder by the scraping blade and cleaning the scraping blade by the cleaning blade, thereby improving the service life of the scraper assembly. Attached Figure Description

[0018] Figure 1 This is a half-sectional schematic diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the scraper device.

[0020] Figure 3 This is a magnified view of a portion of point A.

[0021] Figure 4 The section view is not provided for scraper devices.

[0022] Reference numerals: 1. Blade lifting mechanism; 1-1. Lifting seat; 1-2. Lifting cylinder; 1-3. Cylinder connector; 1-4. Blade shaft connecting plate; 2. Scraper assembly; 2-1. Rotating component; 2-2. Scraper shaft; 2-3. Scraping blade; 2-4. Cleaning blade; 2-5. Material discharge protrusion; 2-6. Rotating cylinder; 2-7. Connecting rod; 2-8. Mounting cavity; 2-9. Water spray pipe; 2-10. Water inlet pipe; 2-11. Water spray rib; 2-12. Spray nozzle; 2-13. Compacting nozzle; 3. Compacting mechanism; 3-1. Compacting drive component; 3-2. Compacting rod; 3-3. Compacting plate; 3-4. First rod part; 3-5. Second rod part; 3-6. Third rod part; 3-7. Limiting plate; 3-8. Reset spring; 3-9. Compacting motor; 3-10. Eccentric wheel; 3-11. Mounting plate; 4. Centrifugal cylinder; 5. Outer sleeve; 6. Centrifugal drive component; 7. Guide cylinder; 8. Slag discharge hole. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings.

[0024] A scraper centrifuge includes a centrifuge and a scraper device. The scraper device is fixedly installed on the centrifuge and scrapes the centrifuge drum to ensure that the centrifuge drum can continuously perform centrifugation operations.

[0025] The scraper device includes a scraper lifting mechanism 1, a scraper assembly 2, and a crushing mechanism 3. The scraper lifting mechanism 1 is fixedly installed on the centrifuge. The scraper assembly 2 is connected to the scraper lifting mechanism 1. The scraper lifting mechanism 1 drives the scraper assembly 2 to rise and fall. During centrifugation, the scraper assembly 2 is raised to prevent the crushing mechanism 3 from colliding with the centrifuge drum. The crushing mechanism 3 is installed inside the scraper assembly 2 and extends out of the lower end of the scraper assembly 2. The scraper assembly 2 scrapes the centrifuge drum, and the crushing mechanism 3 crushes the scraped residue, thereby refining the residue and making it easier to discharge from the centrifuge drum.

[0026] The scraper assembly 2 includes a rotating component 2-1, a scraper shaft 2-2, a scraping blade 2-3, and a cleaning blade 2-4. The scraping blade 2-3 and the cleaning blade 2-4 are fixedly connected to the scraper shaft 2-2, and the cutting edge of the cleaning blade 2-4 is attached to the scraping blade 2-3. The scraper shaft 2-2 is rotatably mounted on the centrifuge via the rotating component 2-1.

[0027] The rotating component 2-1 has three working angles. During centrifugation, the rotating component 2-1 rotates the scraper assembly 2 in the opposite direction, so that the scraping blade 2-3 and the cleaning blade 2-4 face the center of the centrifuge cylinder. During the scraping operation, the rotating component 2-1 rotates the scraper assembly 2 in the forward direction, so that the scraping blade 2-3 is attached to the inner wall of the centrifuge cylinder. When cleaning the scraping blade 2-3, the rotating component 2-1 continues to rotate the scraper assembly 2 in the forward direction. During the rotation, the scraping blade 2-3 is bent due to the restriction of the inner wall of the centrifuge cylinder, and the cutting edge of the cleaning blade 2-4 moves toward the cutting edge of the scraping blade 2-3, thereby removing the residual adhering substances on the scraping blade 2-3 and ensuring the service life of the scraping blade 2-3.

[0028] The scraping blade 2-3 and the cleaning blade 2-4 are respectively arranged in an arc shape. The cleaning blade 2-4 is abutted against the inner side of the cleaning blade 2-4. The cutting edge of the scraping blade 2-3 extends out of the cleaning blade 2-4 to prevent the cleaning blade 2-4 from scraping the inner wall of the centrifuge cylinder during the scraping process. A material discharge protrusion 2-5 is connected at the inlet of the cleaning blade 2-4. When the attached material touches the material discharge protrusion 2-5, the attached material deforms, thereby causing the attached material to fall off.

[0029] The rotating component 2-1 includes a rotating cylinder 2-6 and a connecting rod 2-7. The connecting rod 2-7 is fixedly connected to the scraper shaft 2-2 extending out of the centrifuge. The rotating cylinder 2-6 is connected to the connecting rod 2-7. The rotating cylinder 2-6 drives the scraper shaft 2-2 to rotate through the connecting rod 2-7. When the rotating cylinder 2-6 is installed, the rotating cylinder 2-6 can rotate relative to the mounting plate 3-11 to prevent the rotating component 2-1 from failing.

[0030] The scraper shaft 2-2 has a mounting cavity 2-8 formed inside, and a water spray pipe 2-9 is installed in the mounting cavity 2-8. A water inlet pipe 2-10 is fixedly connected to the scraper shaft 2-2 and is connected to the water spray pipe 2-9. A water spray rib 2-11 is fixedly connected to the scraper blade 2-3. The water spray rib 2-11 is designed to improve the rigidity of the scraper blade 2-3, thereby facilitating the scraper blade 2-3 to scrape the inner wall of the centrifuge. A nozzle 2-12 is installed on the water spray rib 2-11. The nozzle 2-12 is positioned towards the contact area between the scraper blade 2-3 and the cleaning blade 2-4 and is connected to the water spray pipe 2-9. Water is sprayed onto the blade edge through the nozzle 2-12 to soften the adhering substances and facilitate scraping.

[0031] A compaction nozzle 2-13 is installed on the lower end face of the mounting cavity 2-8. The compaction nozzle 2-13 is connected to the water spray pipe 2-9. The compaction nozzle 2-13 sprays water onto the compaction plate 3-3. The wet compaction plate 3-3 is more convenient for compacting and refining the attached material.

[0032] In some preferred embodiments, there is a certain gap between the end of the water spray rib 2-11 and the cutting edge of the scraper blade 2-3, so that the scraper blade 2-3 can bend sufficiently when the cleaning blade 2-4 cleans the scraper blade 2-3.

[0033] The compaction mechanism 3 includes a compaction drive component 3-1, a compaction rod 3-2, and a compaction plate 3-3. The compaction rod 3-2 is slidably installed inside the scraper shaft 2-2, with both ends of the compaction rod 3-2 extending out of the scraper shaft 2-2. The compaction plate 3-3 is fixedly connected to the lower end of the compaction rod 3-2. The compaction drive component 3-1 is connected to the upper end of the compaction rod 3-2, driving the compaction rod 3-2 to move up and down. The compaction drive component 3-1 drives the compaction plate 3-3 to move up and down, thereby facilitating the compaction and refining of the scraped-off attachments, and thus facilitating the discharge of the attachments from the centrifuge cylinder.

[0034] In some preferred embodiments, a groove is formed on the side wall of the scraper shaft 2-2, and the rolling rod 3-2 extends out of the scraper shaft 2-2 through the groove, so as to facilitate the rolling rod 3-2 to slide up and down.

[0035] The rolling rod 3-2 includes a first rod part 3-4, a second rod part 3-5, and a third rod part 3-6 that are connected to each other. The rolling drive component 3-1 is connected to the first rod part 3-4. The rolling plate 3-3 is fixedly connected to the third rod part 3-6. A limit plate 3-7 is fixedly connected to the third rod part 3-6. A return spring 3-8 is connected between the limit plate 3-7 and the scraper shaft 2-2. The return spring 3-8 lifts the rolling rod 3-2 to ensure that the rolling rod 3-2 can move up and down stably.

[0036] The compaction drive component 3-1 includes a compaction motor 3-9 and an eccentric wheel 3-10. The compaction motor 3-9 is connected to the scraper shaft 2-2 via a mounting plate 3-11. The eccentric wheel 3-10 is mounted on the compaction motor 3-9. The first rod 3-4 abuts against the eccentric wheel 3-10. The compaction rod 3-2 is driven to move up and down by the eccentric wheel 3-10, which facilitates the compaction and refinement of the scraped-off attachments.

[0037] Mounting plate 3-11 is fixedly connected to the cutter shaft connecting plate 1-4 of scraper shaft 2-2. Rolling motor 3-9 and rotating cylinder 2-6 are respectively connected to cutter shaft connecting plate 1-4 through mounting plate 3-11.

[0038] The scraper lifting mechanism 1 includes a lifting seat 1-1, a lifting cylinder 1-2, a cylinder connector 1-3, and a blade shaft connecting plate 1-4. The lifting seat 1-1 is fixedly installed on the centrifuge, the lifting cylinder 1-2 is fixedly installed on the lifting seat 1-1, the lifting cylinder 1-2 and the blade shaft connecting plate 1-4 are fixedly connected by the cylinder connector 1-3, and the blade shaft connecting plate 1-4 is fixedly installed on the scraper shaft 2-2. The scraper assembly 2 is driven to move up and down by the lifting cylinder 1-2 to prevent the scraper assembly 2 from colliding with the centrifuge cylinder during centrifugation.

[0039] The centrifuge includes a centrifuge cylinder 4, an outer sleeve 5, and a centrifugal drive unit 6. The centrifuge cylinder 4 is rotatably installed inside the outer sleeve 5. The centrifugal drive unit 6 is connected to the centrifuge cylinder 4 and drives the centrifuge cylinder 4 to rotate. A guide cylinder 7 is fixedly connected to the lower end face of the centrifuge cylinder 4. The side wall of the guide cylinder 7 is inclined to facilitate the accumulation of adhering substances below the crushing plate 3-3, thereby facilitating their crushing and refining. A slag discharge hole 8 is connected to the lower end face of the centrifuge cylinder 4 to facilitate the discharge of the refined adhering substances from the centrifuge cylinder. The centrifugal drive unit 6 uses a pulley and a drive motor to rotate the centrifuge cylinder 4.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0041] Although this document makes extensive use of terms corresponding to the figure labels, the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the essence of the invention; interpreting them as any kind of additional limitation would be contrary to the spirit of the invention.

Claims

1. A scraper centrifuge characterized in that, The centrifuge and scraper assembly are included. The scraper assembly is fixedly installed on the centrifuge. The scraper assembly includes a scraper lifting mechanism (1), a scraper assembly (2), and a crushing mechanism (3). The scraper lifting mechanism (1) is fixedly installed on the centrifuge. The scraper assembly (2) is connected to the scraper lifting mechanism (1). The crushing mechanism (3) is installed inside the scraper assembly (2) and extends out of the lower end of the scraper assembly (2). The scraper assembly (2) includes a rotating part (2-1), a scraper shaft (2-2), a scraping blade (2-3), and a cleaning blade (2-4). The scraping blade (2-3) and the cleaning blade (2-4) are also included. The cleaning blade (2-4) is fixedly connected to the scraper shaft (2-2). The cutting edge of the cleaning blade (2-4) is attached to the scraper blade (2-3). The scraper shaft (2-2) is rotatably mounted on the centrifuge via the rotating component (2-1). The rotating component (2-1) drives the scraper blade (2-3) to scrape the inner wall of the centrifuge, and the rotating component (2-1) drives the cleaning blade (2-4) to clean the scraper blade (2-3). The scraper blade (2-3) and the cleaning blade (2-4) are respectively arranged in an arc shape. The cleaning blade (2-4) abuts against the inner side of the cleaning blade (2-3). The cutting edge extends from the cleaning blade (2-4), and a material discharge protrusion (2-5) is connected to the cutting edge of the cleaning blade (2-4). The rotating component (2-1) includes a rotating cylinder (2-6) and a connecting rod (2-7). The connecting rod (2-7) is fixedly connected to the side of the scraper shaft (2-2) extending out of the centrifuge. The rotating cylinder (2-6) is connected to the connecting rod (2-7), and the rotating cylinder (2-6) drives the scraper shaft (2-2) to rotate through the connecting rod (2-7). The rotating component (2-1) has three working angles. During centrifugation, the rotating component (2-1) rotates the scraper assembly in the opposite direction. (2) Make the scraper blade (2-3) and cleaning blade (2-4) face the center of the centrifuge tube; during the scraping operation, the rotating part (2-1) rotates the scraper assembly (2) in the forward direction, so that the scraper blade (2-3) is attached to the inner wall of the centrifuge tube; when cleaning the scraper blade (2-3), the rotating part (2-1) continues to rotate the scraper assembly (2) in the forward direction. During the rotation, the scraper blade (2-3) is restricted by the inner wall of the centrifuge tube and bends. The cutting edge of the cleaning blade (2-4) moves toward the cutting edge of the scraper blade (2-3), thereby scraping away the residual adhering substances on the scraper blade (2-3).

2. A scraper centrifuge according to claim 1, characterised in that The scraper shaft (2-2) has an installation cavity (2-8) formed inside. A water spray pipe (2-9) is installed inside the installation cavity (2-8). A water inlet pipe (2-10) is fixedly connected to the scraper shaft (2-2). The water inlet pipe is connected to the water spray pipe (2-9). A water spray rib (2-11) is fixedly connected to the scraper blade (2-3). A nozzle (2-12) is installed on the water spray rib (2-11). The nozzle (2-12) is positioned facing the contact area between the scraper blade (2-3) and the cleaning blade (2-4) and is connected to the water spray pipe (2-9).

3. A scraper centrifuge according to claim 2, characterised in that A compaction nozzle (2-13) is installed on the lower end face of the mounting cavity (2-8), and the compaction nozzle (2-13) is connected to the water spray pipe (2-9).

4. A scraper centrifuge according to claim 1, characterized in that The compaction mechanism (3) includes a compaction drive (3-1), a compaction rod (3-2), and a compaction plate (3-3). The compaction rod (3-2) is slidably installed inside the scraper shaft (2-2). Both ends of the compaction rod (3-2) extend out of the scraper shaft (2-2). The compaction plate (3-3) is fixedly connected to the lower end of the compaction rod (3-2). The compaction drive (3-1) is connected to the upper end of the compaction rod (3-2) to drive the compaction rod (3-2) to move up and down.

5. A scraper centrifuge according to claim 4, characterised in that The rolling rod (3-2) includes a first rod part (3-4), a second rod part (3-5), and a third rod part (3-6) that are connected to each other. The rolling drive component (3-1) is connected to the first rod part (3-4). The rolling plate (3-3) is fixedly connected to the third rod part (3-6). A limit plate (3-7) is fixedly connected to the third rod part (3-6). A return spring (3-8) is connected between the limit plate (3-7) and the scraper shaft (2-2).

6. A scraper centrifuge according to claim 5, characterised in that The rolling drive component (3-1) includes a rolling motor (3-9) and an eccentric wheel (3-10). The rolling motor (3-9) is connected to the scraper shaft (2-2) via a mounting plate (3-11). The eccentric wheel (3-10) is mounted on the rolling motor (3-9). The first rod (3-4) abuts against the eccentric wheel (3-10). The mounting plate (3-11) is fixedly connected to the cutter shaft connecting plate (1-4) of the scraper shaft (2-2). The rolling motor (3-9) and the rotating cylinder (2-6) are respectively connected to the cutter shaft connecting plate (1-4) via the mounting plate (3-11).

7. A scraper centrifuge according to claim 1, wherein The scraper lifting mechanism (1) includes a lifting seat (1-1), a lifting cylinder (1-2), a cylinder connector (1-3), and a blade shaft connecting plate (1-4). The lifting seat (1-1) is fixedly installed on the centrifuge, the lifting cylinder (1-2) is fixedly installed on the lifting seat (1-1), the lifting cylinder (1-2) and the blade shaft connecting plate (1-4) are fixedly connected by the cylinder connector (1-3), and the blade shaft connecting plate (1-4) is fixedly installed on the scraper shaft (2-2).

8. A scraper centrifuge according to claim 7, characterised in that The centrifuge includes a centrifuge cylinder (4), an outer sleeve (5), and a centrifugal drive component (6). The centrifuge cylinder (4) is rotatably installed inside the outer sleeve (5). The centrifugal drive component (6) is connected to the centrifuge cylinder (4) and drives the centrifuge cylinder (4) to rotate. A guide cylinder (7) is fixedly connected to the lower end face of the centrifuge cylinder (4). The side wall of the guide cylinder (7) is inclined. A slag discharge hole (8) is connected to the lower end face of the centrifuge cylinder (4).

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