A centrifuge scraping mechanism

Abstract

A centrifuge scraping mechanism includes a scraping plate and a scraping knife shaft; the scraping plate is a vertically arranged rectangular plate, one side in the length direction of the scraping plate is connected to the lower part of the scraping knife shaft, and a plurality of through grooves are arranged at intervals along the length direction of the scraping plate on the lower side of the scraping plate. At the position on one side in the thickness direction of the scraping plate, an L-shaped rod is provided above each through groove. The L-shaped rod is composed of a horizontal part and a vertical part connected end to end. The horizontal part is connected to the scraping plate on the side away from the vertical part along its length direction, and the vertical part extends vertically downward along its length direction, and the lower side of the vertical part is flush with the lower side of the scraping plate. This mechanism can automatically perform scraping operations after the centrifugation operation is completed. After scraping, the solid-phase material can be directly broken and stirred and dissolved in the drum without transferring the material, which can simplify the operation steps, improve efficiency, and reduce costs.

Description

Technical Field

[0001] The present invention relates to a scraping mechanism for a centrifuge. Background Art

[0002] After centrifugation in the pharmaceutical processing field, the liquid phase will be extracted by a liquid pumping device, and the remaining solid-phase material will adhere to the inner wall of the centrifuge drum. Currently, there is generally a scraping step, and the so-called scraping step is to manually scrape the solid-phase material from the inner wall of the drum into the drum, and then transfer it to other containers to add a solvent, and manually crush and stir it to dissolve it. The obtained solution can be used for other purposes or subsequent processing.

[0003] This traditional method of manual scraping is not only laborious but also inefficient. In addition, since the solid-phase material needs to be transferred between two containers, the steps are relatively complex and the efficiency is not high, and bacteria and impurities are easily mixed in during the transfer process, which does not meet the GMP requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a scraping structure for a centrifuge, which can automatically complete scraping, and directly crush and stir and dissolve the solid-phase material in the drum.

[0005] To solve the above technical problem, the present invention provides a scraping mechanism for a centrifuge, including a scraping plate and a scraper shaft; the scraping plate is a vertically arranged rectangular plate, one side in the length direction of the scraping plate is connected to the lower part of the scraper shaft, and a plurality of through grooves are arranged at intervals along the length direction of the scraping plate on the lower side of the scraping plate. One L-shaped rod is provided above each through groove at one position in the thickness direction of the scraping plate. The L-shaped rod is composed of a horizontal part and a vertical part connected end to end. The horizontal part is connected to the scraping plate on the side away from the vertical part along its length direction, and the vertical part extends vertically downward along the length direction away from the horizontal part, and the lower side of the vertical part is flush with the lower side of the scraping plate.

[0006] For the sake of simplicity in explaining the problem, hereinafter, a scraping mechanism for a centrifuge described in the present invention is simply referred to as this mechanism.

[0007] The usage method of this mechanism is as follows: After centrifugation, the liquid phase is extracted by the liquid pumping device, and the remaining solid material will adhere to the inner wall of the centrifuge drum. At this time, the scraper shaft drives the scraper plate to rotate and approach the inner wall of the drum. When it is 8 - 10 mm away from the inner wall of the drum, it stops advancing. Keep the drum rotating at a low speed. As the drum rotates, the scraper shaft controls the scraper plate to gradually move downwards, and the material attached to the inner wall of the drum is scraped off from top to bottom in sequence. After scraping, the scraper plate resets, and the drum stops running. At this time, a solvent for dissolving the solid material is added into the drum, then the drum motor is started, and the scraper plate advances again to a position 8 - 10 mm away from the inner wall of the drum, slowly descends to the bottom of the drum, and reciprocates up and down at the liquid level. At this time, the scraper plate with through grooves is equivalent to a rake, which plays a role in crushing the solid material and stirring for dissolution. The solid material at different liquid levels is crushed and stirred until it is completely dissolved.

[0008] Advantages of this mechanism: This mechanism can automatically perform the scraping operation after the centrifuge is completed. After scraping, the solid material can be directly crushed and stirred for dissolution inside the drum without transferring the material, which can simplify the operation steps, improve efficiency, reduce costs. In addition, multiple L-shaped rods arranged at intervals form a rake. Since each L-shaped rod is provided with a through groove corresponding to it, the combined use of the two can not only reduce the resistance during stirring but also more quickly crush the solid material and stir it rapidly.

[0009] To achieve better use effects of this mechanism, its preferred solutions are as follows:

[0010] Preferably, slopes are provided on both the lower side of the scraper plate and the side of the scraper plate in the length direction away from the lifting oil cylinder.

[0011] The solid material after centrifugation is relatively hard. The slope provided on the scraper plate is equivalent to an edge, which can facilitate the insertion of the scraper plate into the solid material for scraping.

[0012] Preferably, a taper is provided on the lower side of the vertical portion.

[0013] The taper on the lower side of the vertical portion facilitates insertion into the solid material, and can more easily crush the solid material, thereby accelerating dissolution.

[0014] Preferably, the scraper shaft includes a lifting oil cylinder and a rotating assembly. The scraper plate is connected to the lower part of the cylinder body of the lifting oil cylinder. The rotating assembly includes a rotating chamber, a gear sleeve, a rack, and two pistons. The rack and the two pistons are both in the rotating chamber. The two pistons are respectively fixed on both sides of the rack. The two pistons divide both sides of the rotating chamber into two independent oil cavities. Oil port connectors identical to the two oil cavities are respectively installed at both ends of the rotating chamber. The gear sleeve is sleeved on the side wall of the cylinder body of the lifting oil cylinder, and the gear sleeve cooperates with the rack.

[0015] Adopting this structure can accurately control the lifting and rotation of the scraper plate. Description of the Drawings

[0016] Figure 1 is the front view of this mechanism.

[0017] Figure 2 is the top view of this mechanism.

[0018] Figure 3 is the three-dimensional view of the scraping plate in this mechanism.

[0019] Figure 4 is another three-dimensional view of the scraping plate in this mechanism.

[0020] Figure 5 is the schematic diagram of the installation state of this mechanism. Detailed Implementation Manner

[0021] Refer to Figures 1 - 5 , a centrifuge scraping mechanism, including a housing 1, a scraping plate 2 and a scraping knife shaft; the scraping knife shaft is arranged inside the housing 1, the middle part of the housing 1 is fixedly connected to the upper cover 6 of the centrifuge, and vertically extends out of the lower side of the housing 1 and extends into the drum 5; the scraping plate 2 at the lower end of the scraping knife shaft is a vertically arranged rectangular plate, one side in the length direction of the scraping plate 2 is connected to the lower part of the scraping knife shaft, and a plurality of through grooves 21 are arranged at intervals along the length direction of the scraping plate 2 on the lower side of the scraping plate 2. Above each through groove 21, an L-shaped rod 22 is provided at a position on one side in the thickness direction of the scraping plate 2. The L-shaped rod 22 is composed of a horizontal part 221 and a vertical part 222 connected end to end. One side of the horizontal part 221 away from the vertical part 222 along its length direction is connected to the scraping plate 2, and one side of the vertical part 222 away from the horizontal part 221 along its length direction extends vertically downward, and the lower side of the vertical part 222 is flush with the lower side of the scraping plate 2.

[0022] Both the lower side of the scraping plate 2 and the side of the scraping plate 2 away from the lifting oil cylinder 3 in the length direction are provided with slopes.

[0023] The lower side of the vertical part 222 is provided with a taper.

[0024] The scraping knife shaft includes a lifting oil cylinder 3 and a rotating assembly 4. The scraping plate 2 is connected to the lower part of the cylinder body 31 of the lifting oil cylinder 3. The rotating assembly 4 includes a rotating chamber 41, a gear sleeve 42, a rack 43 and two pistons 44. The rack 43 and the two pistons 44 are both in the rotating chamber 41. The two pistons 44 are respectively fixed on both sides of the rack 43. The two pistons 44 divide both sides of the rotating chamber 41 into two independent oil cavities. Oil port connectors 45 identical to the two oil cavities are respectively installed at both ends of the rotating chamber 41. The gear sleeve 42 is sleeved on the side wall of the cylinder body 31 of the lifting oil cylinder 3, and the gear sleeve 42 is engaged with the rack 43 (only one structure of the scraping knife shaft is given in this embodiment. The scraping knife shaft has the functions of axial telescoping and rotation, and other scraping knife shafts with this function can also be used in cooperation with the scraping plate 2).

[0025] The usage method of this mechanism is as follows: After centrifugation, the liquid phase is extracted by the liquid pumping device, and the remaining solid-phase material will adhere to the inner wall of the centrifuge drum 5. At this time, the scraper shaft drives the scraper plate 2 to rotate and approach the inner wall of the drum 5. When the distance from the inner wall of the drum 5 is 8 - 10 mm, the rotation is stopped, and the drum 5 is kept rotating at a low speed. As the drum 5 rotates, the scraper shaft controls the scraper plate 2 to gradually move downwards, and the material adhering to the inner wall of the drum 5 is scraped off from top to bottom in sequence. After the scraping is completed, the scraper plate 2 returns to its original position, and the drum 5 stops running. At this time, a solvent for dissolving the solid-phase material is added into the drum 5, and then the drum motor is started. The scraper plate 2 rotates in again to a position 8 - 10 mm away from the inner wall of the drum 5, slowly descends to the lowest side of the drum 5, and reciprocates up and down on the liquid surface. At this time, the scraper plate 2 provided with the through groove 21 is equivalent to a rake, which plays a role in crushing the solid-phase material and stirring for dissolution. The solid-phase material at different liquid levels is crushed and stirred until it is completely dissolved.

[0026] Advantages of this mechanism: This mechanism can automatically perform scraping operation after the centrifugation operation. After scraping, the solid-phase material can be directly crushed and stirred for dissolution in the drum 5 without transferring the material, which can simplify the operation steps, improve efficiency, reduce costs. In addition, multiple L-shaped rods 22 arranged at intervals form a rake. Since each L-shaped rod 22 is provided corresponding to a through groove 21, the combined use of the two can not only reduce the resistance during stirring but also break the solid-phase material more quickly and stir it rapidly.

[0027] The solid-phase material after centrifugation is relatively hard. The slope provided on the scraper plate 2 is equivalent to an edge, which can facilitate the insertion of the scraper plate 2 into the solid-phase material for scraping.

[0028] The taper on the lower side of the vertical part 222 is convenient for inserting into the solid-phase material, and it can more easily break the solid-phase material, thus accelerating dissolution.

Claims

1. A centrifuge scraping mechanism, characterized in that: It includes a scraping plate and a scraping knife shaft; the scraping plate is a vertically arranged rectangular plate, one side in the length direction of the scraping plate is connected to the lower part of the scraping knife shaft, several through grooves are arranged at intervals along the length direction of the scraping plate on the lower side of the scraping plate, and an L-shaped rod is provided above each through groove at a position on one side in the thickness direction of the scraping plate. The L-shaped rod is composed of a horizontal part and a vertical part connected end to end. The horizontal part is connected to the scraping plate on the side away from the vertical part along its length direction, and the vertical part extends vertically downward along the length direction away from the horizontal part, and the lower side of the vertical part is flush with the lower side of the scraping plate; Both the lower side of the scraping plate and the side away from the lifting oil cylinder in the length direction of the scraping plate are provided with slopes; The lower side of the vertical part is provided with a taper; The scraping knife shaft includes a lifting oil cylinder and a rotating assembly. The scraping plate is connected to the lower part of the cylinder body of the lifting oil cylinder. The rotating assembly includes a rotating chamber, a gear sleeve, a rack and two pistons. The rack and the two pistons are both in the rotating chamber. The two pistons are respectively fixed on both sides of the rack. The two pistons divide both sides of the rotating chamber into two independent oil cavities. Oil port connectors identical to the two oil cavities are respectively installed at both ends of the rotating chamber. The gear sleeve is sleeved on the side wall of the cylinder body of the lifting oil cylinder, and the gear sleeve is matched with the rack.

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