A scraper discharge apparatus for a centrifuge

Abstract

This utility model relates to a scraper unloading device for a centrifuge. The technical solution is as follows: A centrifuge is included, and a fixed block inclined to the left is installed on the top cover of the left side of the feeding cylinder of the centrifuge. A scraper mechanism is rotatably inserted into the middle opening of the fixed block through a built-in bearing. The scraper mechanism includes a rotating tube extending into the inner side of the left side wall of the rotating drum. A scraper is fixedly connected to the left side wall of the rotating tube. Several spray holes are evenly opened from top to bottom on both sides of the connection between the rotating tube and the scraper. A rotating sealing joint is connected to the top end of the rotating tube. The liquid inlet pipe on the left side of the rotating sealing joint is connected to the liquid outlet of a water pump. The lower part of the water pump is mounted on the fixed block through a first U-shaped bracket. The rotating tube is driven by a drive mechanism mounted on the right side of the fixed block. The beneficial effects of this utility model are: reduced scraping blind spots and residue, automatic rinsing, and improved unloading efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of centrifuges and relates to a scraper unloading device for centrifuges. Background Technology

[0002] A centrifuge utilizes the centrifugal force generated by the high-speed rotation of a rotating drum to separate the filtrate injected into the drum through filter bags lined with the drum. The filter residue remains in the drum, while the filtrate flows through the outlet to a collector. As a high-performance, bottom-discharge, intermittent centrifugal filtration device, the centrifuge is widely used in industries such as chemical, petroleum, pharmaceutical, food, coal, and water treatment. The scraper device of the centrifuge is a crucial component for achieving automatic operation; to enable automatic unloading, a scraper is typically used in conjunction with the rotating drum.

[0003] Existing Chinese patent CN221452926U discloses a scraper-discharge centrifuge for chemical products, relating to the technical field of solid-liquid separation devices. It solves the technical problem of inconvenient cooperation between the scraper and filter bag in existing bag-type scraper-discharge centrifuges, leading to mutual interference. This invention includes a housing, within which a scraper device is telescopically mounted. The scraper device includes a lifting component and a telescopic rod located at the telescopic end of the lifting component. One end of the telescopic rod is equipped with a scraper assembly for scraping the filter cake. This invention adjusts the scraping height and thickness of the scraped material through the scraper device, ensuring close contact scraping of the inner wall of the drum at different inclinations, preventing damage to the drum. Furthermore, it directly uses a drum with filter holes to achieve solid-liquid separation, eliminating the need for filter cloth and preventing the filter cloth from not adhering to the drum or being scraped up by the scraper, reducing safety hazards during the scraping process and ensuring no blind spots are missed.

[0004] In the aforementioned device, although the scraper assembly can move up and down along the inner wall of the drum, and the scraper group can achieve contact with the inner wall of the drum through the springs on the upper and lower sides, the telescopic rod cannot move laterally. As the telescopic rod moves the scraper group upward, a gap will be created between the blades of the scraper group and the drum. Consequently, the scraper group cannot completely cover the inner wall of the drum, resulting in residue during unloading and affecting the unloading effect. Therefore, this utility model provides a scraper unloading device for a centrifuge to solve the above problems. Utility Model Content

[0005] In view of the problems existing in the prior art, this utility model discloses a scraper unloading device for a centrifuge. The technical solution adopted is as follows: The centrifuge includes a housing. A motor tilted to the right is installed on the right side of the top cover of the housing. The output shaft of the motor is fixedly connected to a cloth cylinder extending into the housing. A feeding hopper is opened on the top cover of the housing, directly opposite the upper part of the circumferential side wall of the cloth cylinder. A rotating drum with uniformly distributed filter holes is installed inside the housing. The discharge pipe at the lower part of the rotating drum is rotatably and sealingly connected to the bottom of the housing through a sleeve bearing. A gear is also sleeved on the discharge pipe at the lower part of the rotating drum. The gear meshes with a gear sleeved on a drive motor. The motor is installed at the bottom of the housing. A fixed block tilted to the left is installed on the top cover on the left side of the fabric cylinder. A scraper mechanism is rotatably inserted through the middle opening of the fixed block via an internal bearing. The scraper mechanism includes a rotating tube that extends into the inner side of the left side wall of the drum. A scraper is fixedly connected to the left side wall of the rotating tube. Several spray holes are evenly opened from top to bottom on both sides of the connection between the rotating tube and the scraper. A rotating sealing joint is connected to the top of the rotating tube. The liquid inlet pipe on the left side of the rotating sealing joint is connected to the liquid outlet of the water pump. The lower part of the water pump is installed on the fixed block via a first U-shaped bracket. The rotating tube is driven by a drive mechanism installed on the right side of the fixed block.

[0006] As a preferred embodiment of this utility model, the blade of the scraper is parallel to the inner wall of the left side of the drum, and the distance between the two is 1-2mm; this design can effectively reduce the friction between the drum and the blade of the scraper and improve the service life of the scraper.

[0007] As a preferred embodiment of this utility model, the spray hole faces the front and rear sidewalls of the scraper; this design allows for spraying a comprehensive coating onto the scraper surface through the spray hole, effectively removing debris retained on its surface.

[0008] As a preferred embodiment of this utility model, the length of the scraper is equal to the inclination height of the left side wall of the drum; this design can fully cover the entire left side wall of the drum, eliminating the need to move the scraper up and down, thus improving the efficiency of unloading.

[0009] As a preferred embodiment of this utility model, after the scraper rotates 180 degrees around the rotating tube, its blade does not contact the cloth cylinder; this design allows the scraper blade to be rotated to face the cloth cylinder during centrifugal operation, thus preventing the scraper from blocking the material fragments that are dispersed and sprayed from the cloth cylinder towards the rotating drum for centrifugation.

[0010] As a preferred embodiment of this utility model, the driving mechanism includes a first gear fixedly mounted on the rotating tube, the right edge of the first gear meshing with the teeth of a second gear, the second gear fixedly mounted on the output shaft of an inverted servo motor, and the servo motor mounted on the upper right side of the fixed block via a second U-shaped bracket; by adopting a driving mechanism, it is convenient to drive the rotating tube and the scraper to rotate via the servo motor, thereby scraping off the debris accumulated on the inner wall of the drum layer by layer, thus realizing automatic unloading.

[0011] The beneficial effects of this utility model are:

[0012] The blade of the scraper is parallel to the inner wall of the left side of the drum and the distance between them is only 1-2mm, which ensures a tight fit when scraping the material. At the same time, the length of the scraper is equal to the tilt height of the left side wall of the drum, which reduces the blind spot and residue during scraping. In addition, there is no need to move the pipe up and down, which reduces the mechanical structure and makes it more stable.

[0013] The rotating tube drives the scraper to rotate 180 degrees and then does not contact the cloth cylinder, thus avoiding blocking the material debris that is dispersed and sprayed from the cloth cylinder to the rotating drum for centrifugation during the centrifugation process, thereby improving centrifugation efficiency. The spray holes on the rotating tube face the front and rear side walls of the scraper, so that the scraper and the inner wall of the rotating drum can be washed by the water flow delivered by the water pump at the same time as scraping, realizing simultaneous scraping and washing, improving the unloading effect, and reducing the tediousness of manually cleaning the scraper. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the centrifuge of this utility model;

[0016] Figure 3 This is a schematic diagram of the scraper mechanism and drive mechanism of this utility model;

[0017] Figure 4 This is a detailed cross-sectional view of the scraper mechanism of this utility model.

[0018] In the diagram: 1-Centrifuge, 11-Shell, 12-Fabricating cylinder, 13-Feeding hopper, 14-Drum, 15-Drive motor, 2-Fixing block, 3-Scraper mechanism, 31-Rotating tube, 311-Spray hole, 32-Scraper, 33-Rotating sealing joint, 34-Water pump, 35-First U-shaped bracket, 4-Drive mechanism, 41-First gear, 42-Second gear, 43-Servo motor, 44-Second U-shaped bracket. Detailed Implementation

[0019] Example 1

[0020] like Figures 1 to 4As shown, the scraper unloading device for a centrifuge according to this utility model adopts the following technical solution: A centrifuge 1 is included, comprising a housing 11. A motor tilted to the right is installed on the right side of the top cover of the housing 11. The output shaft of the motor is fixedly connected to a cloth cylinder 12 extending into the housing. A feeding hopper 13 is opened on the top cover of the housing, directly opposite the upper part of the circumferential side wall of the cloth cylinder 12. A rotating drum 14 with uniformly distributed filter holes is installed inside the housing 11. The discharge pipe at the lower part of the rotating drum 14 is rotatably and sealingly connected to the bottom of the housing 11 via a sleeve bearing. A gear is also sleeved on the discharge pipe at the lower part of the rotating drum 14. The gear meshes with a gear mounted on a drive motor 15. The drive motor 15 is installed at the bottom of the housing. A fixing block 2 tilted to the left is installed on the top cover on the left side of the cloth cylinder 12. A scraper mechanism 3 is rotatably inserted into the middle opening of the fixing block 2 via an internal bearing. The scraper mechanism 3 includes... The rotating tube 31 extends into the inner side of the left side wall of the rotating drum 14. A scraper 32 is fixedly connected to the left side wall of the rotating tube 31. The blade of the scraper 32 is parallel to the inner side wall of the left side of the rotating drum 14, and the distance between them is 1-2 mm. The length of the scraper 32 is equal to the tilt height of the left side wall of the rotating drum 14. After the scraper 32 rotates 180 degrees around the rotating tube 31, its blade does not contact the fabric cylinder 12. Several spray holes 311 are evenly opened from top to bottom on the front and rear sides of the connection between the rotating tube 31 and the scraper 32. The spray holes 311 face the front and rear side walls of the scraper 32. A rotating sealing joint 33 is connected to the top of the rotating tube 31. The liquid inlet pipe on the left side of the rotating sealing joint 33 is connected to the liquid outlet of the water pump 34. The lower part of the water pump 34 is mounted on the fixed block 2 through the first U-shaped bracket 35. The rotating tube 31 is driven by the driving mechanism 4 mounted on the right side of the fixed block 2.

[0021] The drive mechanism 4 includes a first gear 41 fixedly mounted on the rotating tube 31. The right edge of the first gear 41 meshes with the teeth of a second gear 42. The second gear 42 is fixedly mounted on the output shaft of an inverted servo motor 43. The servo motor 43 is mounted on the upper right side of the fixed block 2 via a second U-shaped bracket 44.

[0022] The working principle of this utility model is as follows: During operation, the material enters the housing 11 through the feeding hopper 13 and falls onto the side wall of the cloth cylinder 12 driven by the motor. The rotation of the cloth cylinder 12 disperses the material, causing it to splash onto the inner wall of the rotating drum 14. The drive motor 15 drives the drum 14 to rotate via gear transmission, achieving material separation. The separated material adheres to the inclined inner wall of the drum 14. During this stage, the blade of the scraper 32 faces the cloth cylinder 12 to avoid obstructing the splashed material. In the unloading stage, the servo motor 43, through the second gear 4... 2. Drive the first gear 41 to rotate, which in turn drives the rotating tube 31 and the scraper 32 to rotate, so that the blade of the scraper 32 gradually approaches the inner wall of the left side of the drum 14. At the same time, the water pump 34 sends water into the rotating tube 31 through the rotating sealing joint 33, and sprays it onto the front and rear side walls of the scraper 32 and the inner wall of the drum through the spray hole 311. While the scraper 32 scrapes off the attached material, the water flow washes away the residual debris, ensuring that the unloading is thorough. After the unloading is completed, the servo motor 43 drives in the opposite direction, so that the scraper 32 rotates 180 degrees to reset, avoiding contact with the cloth cylinder 12 and not affecting the subsequent separation process.

[0023] Electrical connection methods or structures not described in detail in this article are existing technologies. For example, the driver that controls the servo motor and the PLC that controls the entire device are both existing technologies and will not be elaborated on one by one.

[0024] While the specific embodiments of this utility model have been described in detail above, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model. Modifications or variations that do not involve creative labor are still within the protection scope of this utility model.

Claims

1. A scraper discharge device for a centrifuge, comprising a centrifuge (1), the centrifuge (1) comprising a housing (11), a motor tilted to the right installed on the right side of the top cover of the housing (11), the output shaft of the motor being fixedly connected to a cloth cylinder (12) extending into the housing, a feeding hopper (13) being provided on the top cover of the housing directly opposite the upper part of the circumferential side wall of the cloth cylinder (12), a rotating drum (14) with uniformly distributed filter holes being installed inside the housing (11), a discharge pipe at the lower part of the rotating drum (14) being rotatably and sealingly connected to the bottom of the housing (11) via a sleeve bearing, a gear being sleeved on the discharge pipe at the lower part of the rotating drum (14), the gear meshing with a gear mounted on a drive motor (15), the drive motor (15) being installed at the bottom of the housing, characterized in that: A fixed block (2) tilted to the left is installed on the top cover on the left side of the fabric cylinder (12). A scraper mechanism (3) is inserted into the middle opening of the fixed block (2) through a built-in bearing. The scraper mechanism (3) includes a rotating tube (31) that extends into the inner side of the left side wall of the drum (14). A scraper (32) is fixedly connected to the left side wall of the rotating tube (31). Several spray holes (311) are evenly opened from top to bottom on the front and rear sides of the connection between the rotating tube (31) and the scraper (32). A rotating sealing joint (33) is connected to the top of the rotating tube (31). The liquid inlet pipe on the left side of the rotating sealing joint (33) is connected to the liquid outlet of the water pump (34). The lower part of the water pump (34) is installed on the fixed block (2) through a first U-shaped bracket (35). The rotating tube (31) is driven by the driving mechanism (4) installed on the right side of the fixed block (2).

2. The scraper unloading device for a centrifuge according to claim 1, characterized in that: The blade of the scraper (32) is parallel to the inner left wall of the drum (14), and the distance between the two is 1-2 mm.

3. The scraper discharge device for a centrifuge according to claim 1, characterized in that: The spray hole (311) faces the front and rear sidewalls of the scraper (32).

4. The scraper discharge device for a centrifuge according to claim 1, characterized in that: The length of the scraper (32) is equal to the tilt height of the left side wall of the drum (14).

5. The scraper unloading device for a centrifuge according to claim 1, characterized in that: After the scraper (32) rotates 180 degrees around the rotating tube (31), its blade does not contact the fabric tube (12).

6. The scraper unloading device for a centrifuge according to claim 1, characterized in that: The drive mechanism (4) includes a first gear (41) fixedly mounted on the rotating tube (31), the right edge of the first gear (41) meshing with the teeth of the second gear (42), the second gear (42) fixedly mounted on the output shaft of the inverted servo motor (43), and the servo motor (43) mounted on the upper right side of the fixed block (2) via a second U-shaped bracket (44).

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