Removing device for residual filter cake layer of centrifugal machine

Abstract

The utility model relates to a cleaning device for a residual filter cake layer of a centrifugal machine, which comprises an outer barrel and an inner rotating barrel, a scraper and a secondary cleaning device are arranged on a top cover of the outer barrel and vertically extend into a cavity of the inner rotating barrel, and a cleaning head capable of rotating around a vertical axis is arranged on one side of the lower end of the secondary cleaning device. The secondary clearing device can drive the clearing head to ascend and descend vertically, a roller is arranged on the side, away from the vertical axis, of the clearing head, when the clearing head rotates around the vertical axis, the roller can be driven to be away from or close to the inner side wall of the inner rotating barrel, and the roller can grind materials on the inner side wall of the inner rotating barrel so that the materials can fall off. When the centrifuge drum runs at a low speed, the roller device can be tightly attached to the inner side wall or the filter cloth, filter cakes left on the inner side wall or the filter cloth can be removed, meanwhile, the inner side wall or the filter cloth cannot be damaged, the roller is fixed through the elastic steel plate, the position, making contact with the inner side wall of the inner rotary barrel, of the roller can be adjusted, and when the thicknesses of materials on the inner side wall of the inner rotary barrel are different, the roller device can be conveniently detached. And a certain adjusting capability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, in particular to a device for removing residual filter cake layers of centrifuges. Background Art

[0002] When scraping materials in a vertical scraper centrifuge, in order to prevent the scraper from hitting the inner wall of the inner drum or the filter cloth, a filter cake gap of 8-10mm is generally reserved between the scraper blade and the inner wall of the inner drum to protect the inner wall or the filter cloth from being damaged. The materials remaining on the inner wall of the inner drum need to be manually removed, which is time-consuming and labor-intensive, increases the pollution of the materials, and some materials may cause harm to the human body. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a device for removing residual filter cake layer of a centrifuge, so as to solve the problem of completely scraping away materials from the centrifuge.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A device for removing residual filter cake layer of a centrifuge comprises a base and an outer barrel arranged on the top of the base, an inner rotating barrel is rotatably arranged in the cavity of the outer barrel, the bottom of the inner rotating barrel is rotatably arranged on the top of the base, a rotating motor is arranged in the middle of the top cover of the outer barrel, the output shaft of the lower end of the rotating motor extends into the cavity of the inner rotating barrel and is connected to the bottom of the cavity of the inner rotating barrel, and is characterized in that a scraper and a secondary cleaning device are vertically arranged on the top cover of the outer barrel, the lower ends of the scraper and the secondary cleaning device respectively extend vertically into the cavity of the inner rotating barrel, a cleaning head is rotatably arranged on one side of the lower end of the secondary cleaning device around a vertical axis, the secondary cleaning device can drive the cleaning head to move up and down, a roller is arranged on the side of the cleaning head away from the vertical axis, when the cleaning head rotates around the vertical axis, the roller can be driven to move away from or close to the inner side wall of the inner rotating barrel, the roller can crush the material on the inner side wall of the inner rotating barrel to make the material fall off.

[0006] As a preferred embodiment, the part of the secondary cleaning device fixed on the top cover of the outer barrel is an oil cylinder and a rotating device connected up and down. The telescopic rod inside the oil cylinder extends through the rotating device, and the lower end is connected to the cleaning head. The cleaning head can be extended and retracted up and down by the drive of the oil cylinder, and the cleaning head can be rotated by the action of the rotating device.

[0007] As a preferred embodiment, the oil cylinder includes an outer cylinder wall that is fixed on the outside, a center guide rod is coaxially sleeved inside the outer cylinder wall, the upper end of the center guide rod passes through the top of the outer cylinder wall and is fixed to the top of the outer cylinder wall by bolts, an inner sliding cylinder is coaxially sleeved on the outer circumference of the center guide rod, the upper end of the inner sliding cylinder is sealed with the outer side wall of the center guide rod through a sealing head, the outer side of the lower end of the center guide rod is sealed with the inner side surface of the inner sliding cylinder, the lower end of the inner sliding cylinder extends beyond the rotating device, and the inner sliding cylinder is The gap between the inner circumferential side wall and the outer circumferential side wall of the center guide rod is the first chamber, the outer sleeve of the inner sliding cylinder is provided with an outer rotating cylinder that can rotate around the axial direction, a first bearing is arranged between the upper end of the outer rotating cylinder and the upper end of the center guide rod, the axial position of the outer rotating cylinder is fixed, the lower end of the outer rotating cylinder extends to the inner lower end of the rotating device, the space above the top sealing head of the inner sliding cylinder and the inner side wall of the outer rotating cylinder is the second chamber, a sliding groove is opened on the outer rotating cylinder along the axial direction, and a guide bolt extending out of the sliding groove is arranged at the upper end of the inner sliding cylinder.

[0008] As a preferred embodiment, the rotating device includes an outer cylinder wall, the top of the outer cylinder wall is fixed to the bottom of the outer cylinder wall, the bottom of the outer cylinder wall is fixed on the top cover of the outer barrel, the outer cylinder wall is sleeved on the outside of the lower end of the outer rotating cylinder, a second bearing and a third bearing are arranged between the upper and lower ends of the outer cylinder wall and the outer rotating cylinder, a motor is arranged on one side of the outer cylinder wall, a gear is sleeved on the outer rotating cylinder, the motor drives the gear to rotate, the gear drives the outer rotating cylinder to rotate, and the guide bolt in the outer rotating cylinder slide groove drives the inner sliding cylinder to rotate.

[0009] As a preferred embodiment, the cleaning head includes a mounting rod fixedly connected to the lower end of the inner sliding cylinder, a triangular bracket is provided on one side of the mounting rod, horizontal elastic steel plates are provided at the upper and lower ends of the triangular bracket, and rollers are provided on the outer ends of the two elastic steel plates.

[0010] As a preferred embodiment, two flat wheel discs are symmetrically arranged at both ends of the roller close to the vertical axis.

[0011] The utility model has the following beneficial effects: a secondary cleaning device is added to the centrifuge, and the secondary cleaning device is composed of an oil cylinder, a rotating device and a cleaning head from top to bottom. The structures of the oil cylinder and the rotating device cooperate with each other, so that the cleaning head at the bottom can be lifted and rotated, so that the cleaning head can be lifted and lowered along the vertical direction of the inner side wall of the inner rotating barrel, and can also be rotated away from or close to the inner side wall of the inner rotating barrel. A roller is arranged on the cleaning head, and the roller directly contacts the inner side wall of the inner rotating barrel. When the inner rotating barrel rotates at a low speed, the roller rolls on the inner side wall of the inner rotating barrel to separate the materials. The roller can be lifted and lowered and rotated left and right. The roller is mounted on an elastic steel plate. When the centrifuge drum is running at a low speed, the roller device can be close to the inner side wall or the filter cloth to remove the residual filter cake on the inner side wall or the filter cloth without damaging the inner side wall or the filter cloth. The roller is fixed by the elastic steel plate, so that the position where the roller contacts the inner side wall of the inner rotating barrel is elastically adjustable, and when the material thickness on the inner side wall of the inner rotating barrel is different, there is a certain adjustment ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the secondary cleaning device of the utility model;

[0015] Figure 3 A schematic diagram of a secondary cleaning device is shown;

[0016] Figure 4 This is a schematic diagram of the cleaning head structure of the utility model;

[0017] Figure 1~Figure 4 Explanation of the reference numerals in the accompanying drawings: 1. base; 2. outer barrel; 3. inner rotating barrel; 4. scraper; 5. rotating motor; 6. oil cylinder; 7. rotating device; 8. cleaning head; 61. outer cylinder wall; 62. center guide rod; 63. first bearing; 64. sealing head; 65. guide bolt; 66. inner sliding cylinder; 67. outer rotating cylinder; 68. guide groove; 69. first chamber; 610. second chamber; 71. outer cylinder wall; 72. motor; 73. gear; 74. second bearing; 75. third bearing; 81. mounting rod; 82. triangular bracket; 83. elastic steel plate; 84. roller. DETAILED DESCRIPTION

[0018] The specific implementation scheme of the utility model is described in detail below in conjunction with the accompanying drawings.

[0019] like Figure 1~Figure 4The device for removing the residual cake layer of the centrifuge shown comprises a base 1 and an outer barrel 2 arranged on the top of the base 1, an inner rotating barrel 3 is rotatably arranged in the cavity of the outer barrel 2, the bottom of the inner rotating barrel 3 is rotatably arranged on the top of the base 1, a rotating motor 5 is arranged in the middle of the top cover of the outer barrel 2, the output shaft of the lower end of the rotating motor 5 extends into the cavity of the inner rotating barrel 3 and is connected to the bottom of the cavity of the inner rotating barrel 3, a scraper 4 and a secondary cleaning device are vertically arranged on the top cover of the outer barrel 2, the lower ends of the scraper 4 and the secondary cleaning device are respectively vertically extended into the cavity of the inner rotating barrel 3, a cleaning head 8 is rotatably arranged on one side of the lower end of the secondary cleaning device around a vertical axis, the secondary cleaning device can drive the cleaning head 8 to move up and down, a roller 84 is arranged on the side of the cleaning head 8 away from the vertical axis, when the cleaning head 8 rotates around the vertical axis, the roller 84 can be driven to move away from or close to the inner side wall of the inner rotating barrel 3, and the roller 84 can crush the material on the inner side wall of the inner rotating barrel 3 to make the material fall off.

[0020] Specifically, the centrifuge is provided with a scraper 4 extending into the inner cavity. After the scraper 4 cleans the material, a layer of material that has not been completely scraped off remains on the inner wall of the inner rotary barrel 3 or on the filter bag on the inner wall of the inner rotary barrel 3. At this time, the scraper 4 can no longer function, and the sharp blade of the scraper 4 is easily damaged. A secondary cleaning device is added. A roller 84 is provided on the cleaning head of the secondary cleaning device extending into the inner cavity. The wheel surface of the roller 84 can directly contact the inner wall of the inner rotary barrel 3. During the low-speed rotation of the inner rotary barrel 3, the roller 84 rotates and rolls on the inner wall of the inner rotary barrel 3 to squeeze and separate the material attached to the inner wall of the inner rotary barrel 3. The roller 84 can move up and down, and can also swing around the axis of the secondary cleaning device to clean the inner rotary barrel 3 in all directions.

[0021] Among them, the part of the secondary cleaning device fixed on the top cover of the outer barrel 2 is a cylinder 6 and a rotating device 7 connected up and down, the telescopic rod inside the cylinder 6 passes through the rotating device 7, and the lower end is connected to the cleaning head 8. The cleaning head 8 can be extended and retracted up and down by the drive of the cylinder 6, and the cleaning head 8 can be rotated by the rotating device 7. The cleaning head 8 needs to move up and down to adjust the cleaning position on the inner wall of the inner rotating barrel 3. The cleaning head 8 also needs to rotate away from the inner wall of the inner rotating barrel 3 when not cleaning, which requires the combination of the cylinder 6 and the rotating device 7 to achieve.

[0022] like Figure 2 and Figure 3The oil cylinder 6 includes an outer cylinder wall 61 fixed on the outside, a center guide rod 62 is coaxially sleeved inside the outer cylinder wall 61, the upper end of the center guide rod 62 passes through the top of the outer cylinder wall 61 and is fixed to the top of the outer cylinder wall 61 by bolts, an inner sliding cylinder 66 is coaxially sleeved on the outer circumference of the center guide rod 62, the upper end of the inner sliding cylinder 66 is sealed with the outer side wall of the center guide rod 62 through a sealing head 64, the outer side of the lower end of the center guide rod 62 is sealed with the inner side surface of the inner sliding cylinder 66, the lower end of the inner sliding cylinder 66 extends beyond the rotating device 7, and the inner circumferential side wall of the inner sliding cylinder 66 is sealed with the center guide rod 62. The gap between the outer circumferential side walls of the guide rod 62 is the first chamber 69, and the outer sleeve of the inner sliding cylinder 66 is provided with an outer rotating cylinder 67 that can rotate around the axial direction. A first bearing 63 is arranged between the upper end of the outer rotating cylinder 67 and the upper end of the center guide rod 62. The axial position of the outer rotating cylinder 67 is fixed, and the lower end of the outer rotating cylinder 67 extends to the inner lower end of the rotating device 7. The space above the top sealing head 64 of the inner sliding cylinder 66 and the inner side wall of the outer rotating cylinder 67 is the second chamber 610. A sliding groove 68 is opened on the outer rotating cylinder 67 along the axial direction, and a guide bolt 65 extending out of the sliding groove 68 is arranged at the upper end of the inner sliding cylinder 66.

[0023] Among them, when the space of the first chamber 69 increases and the space of the second chamber 610 decreases, the inner sliding cylinder 66 is in an ascending process; when the space of the first chamber 69 decreases and the space of the second chamber 610 increases, the inner sliding cylinder 66 is in a descending process. When the inner sliding cylinder 66 rises or descends, the guide bolt 65 on the inner sliding cylinder 66 slides up and down in the slide groove 68, and the outer rotating cylinder 67 is fixed. When the inner sliding cylinder 66 rotates, the slide groove 68 on the outer rotating cylinder 67 is affected by the force of the guide bolt 65 and rotates synchronously.

[0024] like Figure 2 and Figure 3 The rotating device 7 includes an outer cylinder wall 71, the top of the outer cylinder wall 71 is fixed to the bottom of the outer cylinder wall 61, the bottom of the outer cylinder wall 71 is fixed to the top cover of the outer barrel 2, the outer cylinder wall 71 is sleeved on the outside of the lower end of the outer rotating cylinder 67, and a second bearing 74 and a third bearing 75 are arranged between the upper and lower ends of the outer cylinder wall 71 and the outer rotating cylinder 67. A motor 72 is arranged on one side of the outer cylinder wall 71, and a gear 73 is sleeved on the outer rotating cylinder 67. The motor 72 drives the gear 73 to rotate, and the gear 73 drives the outer rotating cylinder 67 to rotate. The guide bolt 65 in the slide groove 68 of the outer rotating cylinder 67 drives the inner sliding cylinder 66 to rotate. The rotating device 7 is arranged at the bottom of the oil cylinder 6, and the rotating device 7 and the oil cylinder 6 structure cooperate with each other to enable the cleaning head 8 to rise, fall, and rotate.

[0025] like Figure 4The cleaning head 8 includes a mounting rod 81 fixedly connected to the lower end of the inner sliding cylinder 66, a triangular bracket 82 is arranged on one side of the mounting rod 81, and horizontal elastic steel plates 83 are respectively arranged at the upper and lower ends of the triangular bracket 82, and rollers 84 are respectively arranged on the outer ends of the two elastic steel plates 83. The two groups of rollers 84 arranged up and down can shorten the stroke of the cleaning head 8 to move up and down, and the elastic steel plate 83 makes the rollers 84 contact the inner side wall of the inner rotating barrel 3 with a certain elastic buffer force, so that the rollers 84 can be attached to the inner rotating barrel 3 without forming too much pressure on the inner rotating barrel 3.

[0026] The roller 84 is symmetrically provided with two flat wheel discs at both ends near the vertical axis. The narrow circumferential surface of the flat wheel disc rolls on the inner wall of the inner rotating barrel 3, and the materials attached to the inner wall can be easily crushed and separated.

[0027] The working process of the utility model is as follows:

[0028] According to Figures 1-4, first, after the material is dehydrated, the inner rotary barrel 3 is rotated at a low speed, and the scraper 4 is started to make most of the material on the surface of the inner rotary barrel 3 fall off. Then, the scraper 4 is retracted, and the secondary cleaning device is started. The rotating device 7 is rotated to make the roller 84 close to the inner wall of the inner rotary barrel 3, and the material attached to the inner wall of the inner rotary barrel 3 on the horizontal line of the inner rotary barrel 3 is crushed and separated. The oil cylinder 6 is started to adjust up and down so that all areas on the inner wall of the inner rotary barrel 3 are crushed and peeled off. Finally, the secondary cleaning device is retracted to clean the material inside the inner rotary barrel 3.

[0029] The above embodiments are only illustrative of the principles and effects of the invention of the utility model, as well as some embodiments of its application, and are not intended to limit the invention of the utility model. 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 device for removing residual filter cake layer of a centrifuge, comprising a base (1) and an outer barrel (2) arranged on the top of the base (1), an inner rotating barrel (3) rotatably arranged in the cavity of the outer barrel (2), the bottom of the inner rotating barrel (3) rotatably arranged on the top of the base (1), a rotating motor (5) arranged in the middle of the top cover of the outer barrel (2), the output shaft at the lower end of the rotating motor (5) extending into the cavity of the inner rotating barrel (3) and connected to the bottom of the cavity of the inner rotating barrel (3), characterized in that: A scraper (4) and a secondary cleaning device are vertically arranged on the top cover of the outer barrel (2), and the lower ends of the scraper (4) and the secondary cleaning device are respectively vertically extended into the cavity of the inner rotating barrel (3). A cleaning head (8) is arranged on one side of the lower end of the secondary cleaning device and can rotate around a vertical axis. The secondary cleaning device can drive the cleaning head (8) to move up and down. A roller (84) is arranged on the side of the cleaning head (8) away from the vertical axis. When the cleaning head (8) rotates around the vertical axis, it can drive the roller (84) to move away from or close to the inner side wall of the inner rotating barrel (3). The roller (84) can crush the material on the inner side wall of the inner rotating barrel (3) to make the material fall off.

2. The device for removing the residual cake layer of the centrifuge according to claim 1, characterized in that: The part of the secondary cleaning device fixed on the top cover of the outer barrel (2) is an oil cylinder (6) and a rotating device (7) connected up and down. The telescopic rod inside the oil cylinder (6) extends through the rotating device (7) and is connected to the cleaning head (8) at the lower end. The cleaning head (8) can be extended and retracted up and down by the oil cylinder (6), and can be rotated by the rotating device (7).

3. The device for removing the residual filter cake layer of the centrifuge according to claim 2, characterized in that: The oil cylinder (6) comprises an outer cylinder wall (61) fixed on the outside, a center guide rod (62) is coaxially sleeved inside the outer cylinder wall (61), the upper end of the center guide rod (62) passes through the top of the outer cylinder wall (61) and is fixed to the top of the outer cylinder wall (61) by bolts, an inner sliding cylinder (66) is coaxially sleeved on the outer circumference of the center guide rod (62), the upper end of the inner sliding cylinder (66) is sealed with the outer side wall of the center guide rod (62) through a sealing head (64), the outer side of the lower end of the center guide rod (62) is sealed with the inner side surface of the inner sliding cylinder (66), the lower end of the inner sliding cylinder (66) extends beyond the rotating device (7), the inner circumferential side wall of the inner sliding cylinder (66) is sealed with the center guide rod ( The space between the outer circumferential side walls of the inner sliding cylinder (62) is the first chamber (69), the outer sleeve of the inner sliding cylinder (66) is provided with an outer rotating cylinder (67) which can rotate around the axial direction, a first bearing (63) is provided between the upper end of the outer rotating cylinder (67) and the upper end of the central guide rod (62), the position of the outer rotating cylinder (67) along the axial direction is fixed, the lower end of the outer rotating cylinder (67) extends to the inner lower end of the rotating device (7), the space between the upper part of the top sealing head (64) of the inner sliding cylinder (66) and the inner side wall of the outer rotating cylinder (67) is the second chamber (610), the outer rotating cylinder (67) is provided with a slide groove (68) along the axial direction, and the upper end of the inner sliding cylinder (66) is provided with a guide bolt (65) extending out of the slide groove (68).

4. The device for removing the residual cake layer of the centrifuge according to claim 2, characterized in that: The rotating device (7) comprises an outer cylinder wall (71), the top of the outer cylinder wall (71) is fixed to the bottom of the outer cylinder wall (61), the bottom of the outer cylinder wall (71) is fixed to the top cover of the outer barrel (2), the outer cylinder wall (71) is sleeved on the outside of the lower end of the outer rotating cylinder (67), a second bearing (74) and a third bearing (75) are arranged between the upper and lower ends of the outer cylinder wall (71) and the outer rotating cylinder (67), a motor (72) is arranged on one side of the outer cylinder wall (71), a gear (73) is sleeved on the outer rotating cylinder (67), the motor (72) drives the gear (73) to rotate, the gear (73) drives the outer rotating cylinder (67) to rotate, and the guide bolt (65) in the slide groove (68) of the outer rotating cylinder (67) drives the inner sliding cylinder (66) to rotate.

5. The device for removing the residual cake layer of the centrifuge according to claim 1, characterized in that: The cleaning head (8) comprises a mounting rod (81) fixedly connected to the lower end of the inner sliding cylinder (66), a triangular bracket (82) is arranged on one side of the mounting rod (81), and horizontal elastic steel plates (83) are respectively arranged at the upper and lower ends of the triangular bracket (82), and rollers (84) are respectively arranged on the outer ends of the two elastic steel plates (83).

6. The device for removing the residual cake layer of the centrifuge according to claim 1, characterized in that: The roller (84) is symmetrically provided with two flat wheel discs at both ends close to the vertical axis.

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