Discharging scraper of centrifugal machine

Abstract

A scraper head comprises a fixing block, three vertical blades are adjacently arranged on the vertical side face of the fixing block, the three vertical blades are the first blade, the second blade and the third blade in sequence from near to far away from an inner rotary drum during working, the back side of the first blade is fixedly installed on the fixing block, and the back side of the second blade is fixedly installed on the fixing block. One side of the back of the second blade and one side of the back of the third blade are installed in the wedge-shaped opening in a swinging mode through a hinge shaft, and elastic devices are arranged in the wedge-shaped opening of the second blade and the wedge-shaped opening of the third blade respectively, so that the second blade and the third blade get close to the sides away from the first blade under the action of elastic force. The second blade and the third blade in the scraper head are hinged, and after the scraper head scrapes materials and the blades are separated from a material layer, the second blade and the third blade swing towards one side under the action of the spring, so that the distance between the adjacent blades is increased, the blocked materials clamped between the two blades can be automatically separated and fall off, and automatic cleaning of the blades is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of centrifuges, in particular to a discharging scraper of a centrifuge. Background Art

[0002] During the use of the centrifuge, the raw materials after solid-liquid separation will adhere to the inner wall of the inner drum due to centrifugal force. The unloading scraper will scrape the raw materials from the inner wall and then take them out from the unloading port at the bottom of the inner drum. In order to improve the efficiency of scraping off the materials, the scraper head uses multiple adjacent blades to synchronously scrape off the materials at different depths on the inner drum, making it easier to scrape off the materials. However, in the process of scraping off the materials, the materials are easy to enter between the two adjacent blades and cause blockage, which is difficult to clean and affects the effect of the scraper scraping off the materials. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a centrifuge unloading scraper to solve the problem of material blockage between adjacent blades in the scraper and affecting the scraping effect of the scraper.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A centrifuge unloading scraper comprises a scraper head, the scraper head comprises a fixed block, three vertical blades are adjacently arranged on a vertical side surface of the fixed block, and the first blade, the second blade and the third blade are arranged in order from near to far from an inner drum during operation, the vertical backs of the three blades are installed on the vertical side surface of the fixed block, the three blades are suspended outward and the blade edges of the three blades face vertically outward, wherein the back of the first blade is fixedly installed on the fixed block, and the fixed block is respectively provided with wedge-shaped openings at the installation positions of the second blade and the third blade, the backs of the second blade and the third blade are swingably installed in the wedge-shaped opening through a hinge shaft, and the second blade and the third blade are respectively provided with elastic devices in the wedge-shaped opening, so that the second blade and the third blade are subjected to the action of elastic force to approach the side away from the first blade.

[0005] As a preferred embodiment, the elastic device includes a spring, and concave cavities are respectively opened on one side of the two wedge-shaped openings close to the first blade, the openings of the two cavities are respectively facing the corresponding second blade or third blade, and springs are respectively arranged in the two cavities, one end of the spring abuts against the side of the second blade or the third blade.

[0006] As a preferred embodiment, the wedge-shaped opening corresponding to the third blade is larger than the wedge-shaped opening of the second blade.

[0007] As a preferred embodiment, a baffle is vertically arranged between two adjacent blades, one side of the two baffles is respectively arranged on the side of the second blade and the third blade close to the first blade, the free ends of the two baffles can abut against the side of the adjacent blades, and the baffles are inclined from bottom to top toward the blade direction.

[0008] The beneficial effect of the present invention is that the second blade and the third blade in the scraper head are hinged, and after the scraper head scrapes away the material and the blades are separated from the material layer, the second blade and the third blade are swung to one side by the action of the spring, so that the distance between adjacent blades is increased, and the material stuck between the two blades will automatically separate and fall off, thereby realizing automatic cleaning of the blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein: Figure 1 It is a schematic diagram of the structure when the present invention is used; Figure 2 A schematic diagram of the blade position when the present invention is working; Figure 3 It is a schematic diagram of the blade position when not in operation of the present invention; Figure 1~Figure 3 Explanation of the reference numerals in the accompanying drawings: 1. inner drum; 2. material layer; 3. cutter head; 4. fixing block; 5. first blade; 6. second blade; 7. third blade; 8. hinge shaft; 9. baffle; 41. concave cavity; 42. spring; 43. wedge-shaped opening. DETAILED DESCRIPTION

[0010] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0011] like Figure 1~Figure 3 The unloading scraper of the centrifuge shown includes a scraper head 3, which includes a fixed block 4. Three vertical blades are adjacently arranged on a vertical side surface of the fixed block 4. When working, the first blade 5, the second blade 6 and the third blade 7 are arranged from near to far from the inner drum 1. The vertical back sides of the three blades are installed on the vertical side surface of the fixed block 4. The three blades are suspended outward and the blade edges of the three blades are vertically facing outward. The back side of the first blade 5 is fixedly installed on the fixed block 4. The fixed block 4 is respectively provided with wedge-shaped openings 43 at the installation positions of the second blade 6 and the third blade 7. The back sides of the second blade 6 and the third blade 7 are swingably installed in the wedge-shaped opening 43 through a hinge shaft 8. The second blade 6 and the third blade 7 are respectively provided with elastic devices in the wedge-shaped opening 43, so that the second blade 6 and the third blade 7 are subjected to the action of elastic force to approach the side away from the first blade 5.

[0012] Specifically, three blades are arranged on the inner wall of the scraper head 3 facing the inner drum 1, and the blade edges of the three blades are arranged in sequence at a distance from the inner wall of the inner drum 1. In the process of scraping off the material layer 2, the material layer 2 is peeled off synchronously in three layers to increase the unloading efficiency. During unloading, the material is embedded in the gap between two adjacent blades, which is not easy to clean and affects the unloading. The second blade 6 and the third blade 7 are set to be movably swingably connected. In the working state, under the reaction force of the material layer 2, the second blade 6 and the third blade 7 are roughly parallel to the first blade 5. After leaving the material layer 2, the second blade 6 and the third blade 7 are acted upon by the spring 42 to swing away from the first blade 5, so that the distance between adjacent blades becomes larger, and the material sandwiched between adjacent blades is easy to fall off, and the blocked material can be automatically removed.

[0013] The elastic device includes a spring 42, and a concave cavity 41 is respectively opened on one side of the two wedge-shaped openings 43 near the first blade 5. The openings of the two concave cavities 41 face the corresponding second blade 6 or third blade 7 respectively. The two concave cavities 41 are respectively provided with a spring 42, and one end of the spring 42 abuts against the side of the second blade 6 or third blade 7. The spring 42 pushes the second blade 6 and the third blade 7 to swing to the other side in the wedge-shaped opening 43, thereby increasing the distance between the two adjacent blades. When the second blade 6 and the third blade 7 are unloading, the force compresses the spring 42 in the concave cavity 41, so that the three blades remain parallel.

[0014] The wedge-shaped opening 43 corresponding to the third blade 7 is larger than the wedge-shaped opening 43 of the second blade 7. In a non-working state, the distance between two adjacent blades is increased.

[0015] A baffle plate 9 is vertically arranged between two adjacent blades, one side of the two baffle plates 9 is respectively arranged on the side of the second blade 6 and the third blade 7 close to the first blade 5, the free ends of the two baffle plates 9 can abut against the side of the adjacent blades, and the baffle plates 9 are inclined from bottom to top toward the blade. In the working state, the baffle plates 9 prevent the material from falling to the inner side of the blade and block the wedge-shaped opening 43.

[0016] The working process of the present invention is as follows: As shown in Figures 1-3, first, the scraper head 3 is close to the material layer 2, the inner drum 1 rotates, and the three blades of the scraper head 3 are embedded in the material layer 2. The second blade 6 and the third blade 7 are subjected to the reaction force of the material layer when scraping, and the spring 42 is compressed to keep the three blades basically parallel, so that the materials at different positions of the material layer 2 are scraped away synchronously. Then, after the material layer 2 is unloaded, the second blade 6 and the third blade 7 of the scraper head 3 are acted upon by the elastic force of the spring 42, the distance between the two adjacent blades becomes larger, and the material blocked between the two blades falls down.

[0017] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A centrifuge discharging scraper, characterized in that: The scraper head (3) comprises a fixed block (4), and three vertical blades are adjacently arranged on a vertical side surface of the fixed block (4). When working, the first blade (5), the second blade (6) and the third blade (7) are arranged in order from near to far from the inner drum (1). The vertical back sides of the three blades are mounted on the vertical side surface of the fixed block (4). The three blades are suspended outward and the blade edges of the three blades face vertically outward. The back side of the first blade (5) is fixedly mounted on the fixed block (4). The fixed block (4) is respectively provided with wedge-shaped openings (43) at the mounting positions of the second blade (6) and the third blade (7). The back sides of the second blade (6) and the third blade (7) are swingably mounted in the wedge-shaped opening (43) via a hinge shaft (8). The second blade (6) and the third blade (7) are respectively provided with elastic devices in the wedge-shaped opening (43), so that the second blade (6) and the third blade (7) are moved closer to the side away from the first blade (5) under the action of elastic force.

2. The centrifuge discharge scraper according to claim 1, characterized in that: The elastic device comprises a spring (42). Concave cavities (41) are respectively provided on one side of the two wedge-shaped openings (43) close to the first blade (5). The openings of the two concave cavities (41) are respectively facing the corresponding second blade (6) or third blade (7). A spring (42) is respectively provided in the two concave cavities (41). One end of the spring (42) is respectively abutted against the side surface of the second blade (6) or the third blade (7).

3. The centrifuge discharge scraper according to claim 1, characterized in that: The wedge-shaped opening (43) corresponding to the third blade (7) is larger than the wedge-shaped opening (43) of the second blade (7).

4. The centrifuge discharge scraper according to claim 1, characterized in that: A baffle (9) is vertically arranged between two adjacent blades. One side of the two baffles (9) is respectively arranged on the side of the second blade (6) and the third blade (7) close to the first blade (5). The free ends of the two baffles (9) can abut against the side of the adjacent blades. The baffles (9) are inclined from bottom to top in the direction of the blade.

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