Centrifugal precipitation device suitable for sewage treatment

Abstract

The invention discloses a centrifugal precipitation device suitable for sewage treatment, relates to the technical field of sewage centrifugal precipitation, and is used for solving the problems that automatic adjustment and deslagging cannot be performed according to the load condition of a centrifugal mechanism, and the service life of equipment is shortened due to long-time load work of the centrifugal mechanism. The rotating speed of the rotating shaft is adjusted through the electric control box, the height of the balance weight ball connected with the rotating arm is adjusted through the rotating speed adjustment of the rotating shaft, a baffle on the sleeve completes locking of the filter cylinder and abutting against the bottom of the filter cylinder, rotation assistance is carried out, and sliding of the sleeve can push a blocking piece in a drainage cavity to move; sewage which continuously inflows enters the bottom of the filter cartridge, centrifugal filtration work of the sewage is completed in the rotating process of the filter cartridge, when the filtering rate of the filter cartridge is reduced, the baffle is automatically pressed down by utilizing the weight of the sewage, automatic discharge of precipitated sewage is achieved, finally, the electric push rod is started through the electric control box, the scraping rod is pushed in, and cleaning of the inner wall of the filter cartridge is completed.

Description

Technical Field

[0001] The invention relates to the technical field of sewage centrifugal sedimentation, in particular to a centrifugal sedimentation device suitable for sewage treatment. Background Art

[0002] Modern wastewater treatment methods are mainly divided into three categories: physical treatment, chemical treatment and biological treatment. Physical treatment is a wastewater method that separates and recovers insoluble and suspended pollutants in wastewater through physical action. It can be divided into gravity separation, centrifugal separation and screening interception. The treatment units belonging to gravity separation are: sedimentation, flotation (air flotation), etc. The corresponding treatment equipment used is sand settling tank, sedimentation tank, oil separator, gas tank and its auxiliary devices. Centrifuge is commonly used to achieve liquid-solid separation, which is suitable for suspensions with particle size greater than 0.01 mm. Sedimentation centrifuge uses the sedimentation and stratification principle to achieve liquid-solid separation, which is suitable for suspensions with tiny particles or compressible deformation.

[0003] Taking into account the problem of impurity enrichment in the filter cartridge during the centrifugal sedimentation process, as mentioned in the invention patent with publication number CN111974084A, the rotational load of the centrifugal cartridge is realized by setting a rotating mechanism, the solid sediment is precipitated by setting a centrifugal cartridge, and the sediment at the bottom of the centrifugal cartridge is discharged by setting a lifting mechanism. However, the amount of impurities adsorbed on the inner wall of the centrifugal cartridge gradually increases during the centrifugal process, and the equipment cannot automatically detect it, resulting in a decrease in the subsequent centrifugal drainage rate of the centrifugal cartridge. Continuous discharge of liquid from the water inlet without water volume control can easily lead to an increase in the load on the motor, resulting in a reduction in the service life of the working equipment.

[0004] To this end, we propose a centrifugal sedimentation device suitable for sewage treatment. Summary of the invention

[0005] The object of the present invention is to provide a centrifugal sedimentation device suitable for sewage treatment, so as to solve the problem that the centrifugal process cannot automatically adjust the slag discharge according to the load of the centrifugal mechanism, and the centrifugal mechanism works under load for a long time, resulting in a reduction in the life of the equipment.

[0006] To achieve the above object, the present invention provides the following technical solution: a centrifugal sedimentation device suitable for sewage treatment, comprising a centrifugal cylinder, an electric control box is fixed to the top of the centrifugal cylinder by bolts, a rotating shaft is movably connected to the inner wall of the bottom of the centrifugal cylinder by a bearing, a gear is sleeved on the output end of the motor installed in the electric control box and meshes with a gear sleeved on the outer wall of the rotating shaft, a lifting mechanism is sleeved on the rotating shaft, a filter cartridge is sleeved on the outer side of the lifting mechanism, and slide grooves are evenly opened on the inner wall of the filter cartridge;

[0007] The lifting mechanism comprises a sleeve and a baffle, the rotating shaft is slidably connected with the sleeve, the sleeve is fixedly connected with the baffle, the outer wall of the baffle is correspondingly engaged with the sliding groove on the filter cartridge, and the baffle is slidably connected with the inner wall of the filter cartridge.

[0008] Furthermore, a dirt storage box is installed on the top of the centrifugal cylinder, a drainage cavity is opened on the rotating shaft, one end of the rotating shaft passes through the centrifugal cylinder and one side of the dirt storage box respectively, and the drainage cavity is connected to the dirt storage box.

[0009] Furthermore, the lifting mechanism also includes a limit slot rod, a sealing gasket, a sliding rod and a plugging piece. The outer wall of the sleeve and the bottom of the baffle are symmetrically fixed with the limit slot rod by spot welding. The top of the baffle is fixed with a sealing gasket by adhesion. One side of the sleeve passes through the drainage cavity and is connected to the sliding rod. One end of the sliding rod passes through the drainage cavity and extends into the dirt storage box. The end of the sliding rod located in the dirt storage box is fixed with a plugging piece by bolts.

[0010] Furthermore, the rotating shaft is located on the outer wall of the bottom of the sleeve and is symmetrically rotatably connected to a rotating arm through a bearing. One end of the rotating arm is slidably engaged with a slideway on the limiting groove rod, and the other end of the rotating arm is fixed with a counterweight ball by spot welding.

[0011] Furthermore, mesh holes are evenly opened on the filter cartridge, and a limiting cylinder is fixedly connected to the outside of the filter cartridge and located in the centrifugal cylinder. Balls are evenly embedded in the outer wall of the filter cartridge and are rollingly connected, and one side of the ball is in contact with the inner wall of the limiting cylinder.

[0012] Furthermore, a flow channel is provided on the inner wall of the limiting cylinder, a drainage hole is provided on the centrifugal cylinder, and slag outlets are evenly provided on the bottom of the centrifugal cylinder.

[0013] Furthermore, an electric push rod is fixed in the electric control box by bolts, one end of the electric push rod passes through the centrifugal cylinder and is fixedly connected to a placement rod, a scraper rod is rotatably connected to the placement rod, a spring is installed on one side of the scraper rod, and the other end of the spring is fixed to the outer wall of the placement rod, a rotating column is movably connected in the electric control box, a wire drum is fixedly mounted on the outer wall of the rotating column, a soft steel wire is wound around the wire drum, and the soft steel wire is connected to one end of the scraper rod.

[0014] The centrifugal sedimentation method suitable for sewage treatment is:

[0015] High-speed centrifugal drainage: Use the power switch on the electric control box to start the motor, the motor drives the shaft in the centrifugal cylinder to rotate, the sleeve slidably connected on the shaft drives the filter cylinder to rotate at 300r / min through the baffle, the counterweight ball on the shaft rotates and pushes the baffle to fit the inside of the filter cylinder, at this time the pipeline discharges sewage into the dirt storage box, the sewage follows the drainage cavity on the shaft to the top of the baffle, and fits the inner wall of the filter cylinder under high-speed rotation, the impurities in the sewage are adsorbed on the inner wall of the filter cylinder, and the filtered water thrown out by centrifugation fits the inner wall of the limit cylinder, and is finally discharged through the flow channel and the drainage hole on the centrifugal cylinder;

[0016] Low-speed scraping and slag removal: Set the rotation time of the high-speed filter cartridge, and when the set time is reached, the electric control box actively controls the motor speed to reduce the speed of the filter cartridge connected to the baffle on the rotating shaft to 60r / min. At this time, the suspension height of the counterweight ball is reduced, driving the rotating arm to rotate downward, so that the entire sleeve and the baffle on the sleeve move downward by 5cm, and the sliding rod on the sleeve pulls the plug down by 5cm at the same time, closing the drainage cavity on the entire rotating shaft;

[0017] Then the electric control box controls the electric push rod to push the placement rod to contact the inner wall of the filter cartridge. At the same time, the rotating column drives the wire reel to rotate to tighten the soft steel wire, pulling the scraper rod on the entire placement rod to rotate, and the electric push rod continues to descend to complete the scraping of centrifugal impurities on the inner wall of the filter cartridge. The solid impurities that fall on the baffle will be thrown out from the mesh holes and finally discharged through the slag outlet.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, the shaft speed is adjusted through the electric control box, and the shaft speed adjustment is used to achieve the height adjustment of the counterweight ball located at the rotating arm connection, and at the same time, the sleeve is pushed to slide on the shaft, so that the baffle on the sleeve completes the locking of the filter cartridge and abuts against its bottom to assist the rotation, and the sliding of the sleeve will also promote the movement of the plugging plate located in the drainage chamber, and the continuously pouring sewage enters the bottom of the filter cartridge, and completes the centrifugal filtration of the sewage during the rotation of the filter cartridge, and when the filtration rate of the filter cartridge is reduced, the baffle is automatically pressed down by the weight of the sewage to realize the automatic discharge of the precipitated sewage, and finally the electric push rod is started by the electric control box to push the scraper rod to complete the cleaning of the inner wall of the filter cartridge, and at the same time reduce the shaft speed to realize the removal of impurities in the sewage in the filter cartridge, and realize the separation of the centrifugal precipitated sewage and the subsequent discharge of sewage by adjusting the motor speed, the operation and control are simple, and the material can be automatically discharged and the inner wall of the filter cartridge can be cleaned, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the expanded structure of the centrifuge cylinder of the present invention;

[0021] Figure 2 It is a schematic diagram of the front cross-sectional structure of the centrifugal sedimentation device suitable for sewage treatment of the present invention;

[0022] Figure 3 This is a schematic diagram of the connection structure of the lifting mechanism on the rotating shaft of the present invention;

[0023] Figure 4 This is a schematic diagram of the sealing gasket installation structure on the baffle of the present invention;

[0024] Figure 5 It is a schematic diagram of the overall structure of the limiting cylinder of the present invention;

[0025] Figure 6 This is a schematic diagram of the installation structure of the front end placement rod of the electric push rod of the present invention;

[0026] Figure 7 The present invention is a schematic diagram of the working process of the centrifugal sedimentation device suitable for sewage treatment.

[0027] In the figure: 1. centrifugal cylinder; 2. electric control box; 3. rotating shaft; 4. drainage chamber; 5. dirt storage box; 6. lifting mechanism; 601. sleeve; 602. limit groove rod; 603. baffle; 604. sealing gasket; 605. slide rod; 606. plug; 7. rotating arm; 8. counterweight ball; 9. filter cylinder; 10. mesh; 11. slide groove; 12. ball bearing; 13. limit cylinder; 14. flow channel; 15. drainage hole; 16. slag outlet; 17. electric push rod; 18. placement rod; 19. scraper rod; 20. spring; 21. rotating column; 22. wire drum; 23. soft steel wire. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-7 , the present invention provides a technical solution:

[0030] Example 1: Automatic sewage loading and slag discharge are realized through speed control, with a high degree of automation, such as Figure 1 As shown, a rotating shaft 3 is movably connected in the centrifugal cylinder 1, and the rotating shaft 3 is driven by a motor installed in the electric control box 2. The lower side of the rotating shaft 3 body is solid, and the upper side is hollow, and a drainage cavity 4 is opened. The drainage cavity 4 is located in the centrifugal cylinder 1 and has holes, so that water can be poured into one end of the drainage cavity 4, and the water flow is automatically discharged into the filter cylinder 9;

[0031] The chamber for centrifugal filtration is composed of the filter cartridge 9 and the baffle 603. Figure 3As shown, a lifting mechanism 6 is sleeved and installed on the outer wall of the rotating shaft 3 and located on the side of the drainage chamber 4. The main body of the lifting mechanism 6 is a sleeve 601. The sleeve 601 itself is slidably connected with the rotating shaft 3. At the same time, the sleeve 601 extends into the chamber of the drainage chamber 4 and is fixedly connected with the sliding rod 605 in the drainage chamber 4. Therefore, the sliding of the sleeve 601 is accompanied by the movement of the sliding rod 605 in the drainage chamber 4.

[0032] Meanwhile, a baffle 603 is fixedly connected to the sleeve 601. The structure of the entire baffle 603 is as follows: Figure 4 As shown, a protrusion is arranged on the outside and is engaged with the slide groove 11 on the outer wall of the filter cartridge 9. Therefore, after the rotating shaft 3 rotates, the sleeve 601 rotates to drive the baffle 603 to rotate, and the rotation of the baffle 603 can realize the rotation of the entire filter cartridge 9, thereby constructing a centrifugal space. After the subsequent sewage is discharged, it falls on the baffle 603 and the filter cartridge 9, and the centrifugal filtering operation is performed by the rotation of the rotating shaft 3.

[0033] Considering that the sliding of the sleeve 601 will cause part of the sewage to flow down, it is necessary to fit the baffle 603 and the filter cartridge 9 during the centrifugal process. The outer wall of the rotating shaft 3 and the bottom of the baffle 603 are connected to the rotating arm 7 through a bearing for symmetrical rotation. The rotating arm 7 is "L"-shaped, and a counterweight ball 8 is fixed to one end by spot welding, and the other end is clamped with the upper limit groove rod 602 of the sleeve 601. When the entire rotating shaft 3 rotates, the centrifugal force generated drives the counterweight ball 8 to suspend, and at the same time, the counterweight ball 8 rises and drives the rotating arm 7 to rotate obliquely upward, thereby pushing the entire sleeve 601 and the baffle 603 on the sleeve 601 to move upward, so that the top of the baffle 603 is abutted against the filter cartridge 9, and the sealing gasket 604 adhered to the top of the baffle 603 is squeezed to improve the sealing performance, further preventing sewage from flowing out from the abutting side of the baffle 603 and the filter cartridge 9;

[0034] When the rotation speed of the shaft 3 decreases, the weight ball 8 moves downward for a distance due to gravity, causing the sleeve 601 connected to the entire baffle 603 to move downward on the surface of the shaft 3, and the contact position between the baffle 603 and the filter cartridge 9 changes, which is used for the subsequent discharge of the dirt adhered to the surface of the filter cartridge 9;

[0035] At the same time, since the entire sleeve 601 moves downward on the outer wall of the rotating shaft 3, the sliding rod 605 connected to the sleeve 601 in the drainage chamber 4 drives the plug 606 installed on the top to move downward. Figure 2As shown, one end of the entire rotating shaft 3 extends to the dirt storage box 5 installed on the top of the centrifugal drum 1, and the sewage stored in the dirt storage box 5 will flow into the top of the baffle 603 through the drainage chamber 4. When the rotating shaft 3 rotates at a high speed, the rising slide bar 605 pushes the plugging piece 606 to move, and the water inlet for sealing the drainage chamber 4 is not abutted by the plugging piece 606, and the sewage automatically flows in. When the speed of the entire rotating shaft 3 is reduced, the plugging piece 606 on the slide bar 605 presses down the end of the drainage chamber 4 to prevent the continuous discharge of sewage, thereby controlling the continuous internal discharge of sewage. During the gradual change of the speed of the rotating shaft 3, the sewage entering from the drainage chamber 4 will flush the surface of the baffle 603, completing the flushing of the baffle 603 and the mesh 10 at the bottom of the filter cartridge 9.

[0036] Taking into account that the filter cartridge 9 needs to rotate at high speed inside the limiting cylinder 13 and improving the rotation stability of the filter cartridge 9, balls 12 are evenly installed on the upper and lower sides of the outer wall of the filter cartridge 9, and the balls 12 are clamped with the arc groove on the limiting cylinder 13 to avoid the entire filter cartridge 9 from moving when the baffle 603 moves, causing changes in the water outlet position on the filter cartridge 9.

[0037] Embodiment 2: According to the different discharge modes of the centrifugal sedimentation device for sewage treatment, the high-speed rotation of the rotating shaft 3 drives the sleeve 601 to slide upward. At this time, the sewage in the sewage storage box 5 flows along the drainage cavity 4 to the inner wall of the filter cartridge 9. After continuous drainage and long-term centrifugal filtration, there are more impurities on the inner wall of the filter cartridge 9. At this time, the centrifugal drainage rate is reduced, and the water intake is greater than the water output. The sewage on the filter cartridge 9 begins to settle. At the same time, considering the dead weight of the sewage at this time, the baffle 603 on the sleeve 601 is continuously pressed down. The descent of the baffle 603 causes the sewage to be discharged from the mesh 10, and the reduction of the sewage will be lifted by the rotation of the counterweight ball 8, and the discharge of the precipitated sewage is automatically completed;

[0038] However, considering that the inner wall of the filter cartridge 9 is blocked by sludge impurities for a long time, some sewage with high impurity content may be discharged directly without being filtered. In this case, the sludge adhering to the inner wall of the filter cartridge 9 needs to be scraped off. A trigger can be set to be installed at the bottom of the baffle 603. Whether the baffle 603 falls when the rotating shaft 3 rotates at a normal high speed or when the speed decreases, the electric push rod 17 in the electric control box 2 will be triggered to work, and the trigger can directly monitor the height of the baffle 603.

[0039] After the high-speed rotating shaft 3 realizes the preliminary discharge of sewage, the high-speed rotation and centrifugal filtration of the filter cartridge 9 complete the discharge of the filtered sewage, and under the action of high-speed centrifugation, the filtered water is thrown to the inner wall of the limiting cylinder 13, and then discharged through the flow channel 14 on the inner wall of the limiting cylinder 13. A drainage hole 15 is opened on the outer wall of the centrifugal cylinder 1. Figure 1As shown, the filtered sewage will be discharged directly, and the subsequent internal discharge of sewage and the accumulation of impurities on the inner wall of the filter cartridge 9 will cause the centrifugal discharge rate to decrease, and after reaching the critical value of the rotation of the counterweight ball 8, the baffle 603 will be driven down. At this time, the outgoing signal can be started by controlling the trigger, and when the processor in the electric control box 2 receives the signal, it will immediately control the electric push rod 17 to push the placement rod 18 to slide downward;

[0040] like Figure 5 As shown, a scraper rod 19 is movably connected to one side of the placement rod 18, and a scraper blade is arranged at the front end of the scraper rod 19. At the same time, a spring 20 is connected between the scraper rod 19 and the placement rod 18. A soft steel wire 23 is attached to the other end of the scraper rod 19. Considering the uncertainty of the thickness of the sludge accumulated on the inner wall of the filter cartridge 9, it is easy to cause damage to the scraper when the corresponding scraper is directly arranged to abut and scrape. For this reason, an upper rotating column 21 is also arranged in the electric control box 2, and a wire drum 22 is fixedly sleeved on the rotating column 21. One end of the soft steel wire 23 is connected to the wire drum 22. The soft steel wire 23 pulls one end of the scraper rod 19 to drive the scraper rod 19 to rotate, thereby changing the contact distance between the scraper rod 19 and the inner wall of the filter cartridge 9.

[0041] When the electric push rod 17 pushes the scraper rod 19 to move to the inner wall of the bottom of the filter cartridge 9, the placing rod 18 moves, and the wire drum 22 releases the wire at a constant rate. When removing impurities, the rotating column 21 rotates to reel in the soft steel wire 23, and the scraper rod 19 is pulled to rotate by the soft steel wire 23, and the scraper rod 19 gradually contacts the impurities on the inner wall of the filter cartridge 9, and the inner wall of the filter cartridge 9 is cleaned in coordination with the rotation of the filter cartridge 9 and the continuous rise of the electric push rod 17;

[0042] However, considering that the scraped impurities will reattach to the inner wall of the filter cartridge 9 under high-speed centrifugal conditions, the electric control box 2 will also control the motor speed, that is, control the centrifugal suspension height of the weighted ball 8 on the rotating shaft 3, to achieve height control of the baffle 603 at the bottom of the filter cartridge 9, so that the precipitated sewage is discharged from the mesh hole 10 on the filter cartridge 9, and finally discharged from the slag outlet 16 on the centrifugal cylinder 1. By increasing the load mass on the top of the baffle 603, the material is automatically pressed down for discharge, thus avoiding the problem of the liquid level in the filter cartridge rising due to the blockage of the inner wall of the filter cartridge 9 and the reduction of the centrifugal drainage rate, thus avoiding the long-term load rotation of the motor in the electric control box 2, and extending the overall service life of the motor;

[0043] Another working mode of the centrifugal drum 1 is to directly set the high-speed rotation time of the shaft 3, which is usually suitable for conditions where the sewage has a low impurity content. The high-speed rotating filter drum 9 completes the full filtration of the sewage. Therefore, the filter drum 9 only considers the mass of the adsorbed impurities and its own weight. After reaching the set time, the scraper rod 19 at the end of the electric push rod 17 is directly controlled to perform impurity removal processing, and at the same time, the rotation speed of the shaft 3 is controlled to complete the removal of wet impurities.

[0044] The working principle of the present invention is as follows: the motor is started by using the power switch on the electric control box 2, and the motor drives the rotating shaft 3 in the centrifugal cylinder 1 to rotate. The sleeve 601 slidably connected on the rotating shaft 3 drives the filter cylinder 9 to rotate at 300r / min through the baffle 603. The counterweight ball 8 on the rotating shaft 3 rotates and pushes the baffle 603 to fit the inside of the filter cylinder 9. At this time, the pipeline discharges sewage into the dirt storage box 5, and the sewage follows the drainage cavity 4 on the rotating shaft 3 to the top of the baffle 603, and fits the inner wall of the filter cylinder 9 under high-speed rotation. Impurities in the sewage are adsorbed on the inner wall of the filter cylinder 9, and the filtered water thrown out by centrifugation fits the inner wall of the limit cylinder 13, and is finally discharged through the flow channel 14 and the drainage hole 15 on the centrifugal cylinder 1.

[0045] The rotation time of the high-speed filter cartridge 9 is set, and when the set time is reached, the electric control box 2 actively controls the motor speed to reduce the speed of the filter cartridge 9 connected to the baffle 603 on the rotating shaft 3 to 60r / min. At this time, the suspension height of the counterweight ball 8 is reduced, driving the rotating arm 7 to rotate downward, so that the entire sleeve 601 and the baffle 603 on the sleeve 601 move downward by 5cm, and the sliding rod 605 on the sleeve 601 simultaneously pulls the blocking plate 606 down by 5cm, thereby closing the drainage cavity 4 on the entire rotating shaft 3;

[0046] Subsequently, the electric control box 2 controls the electric push rod 17 to push the placement rod 18 to contact the inner wall of the filter cartridge 9. At the same time, the rotating column 21 drives the wire drum 22 to rotate to tighten the soft steel wire 23, pulling the scraper rod 19 on the entire placement rod 18 to rotate, and cooperating with the electric push rod 17 to continue to descend, so as to complete the scraping of the centrifugal impurities on the inner wall of the filter cartridge 9, and the solid impurities that fall onto the baffle 603 will be thrown out from the mesh 10 and finally discharged through the slag outlet 16.

[0047] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A centrifugal sedimentation device suitable for sewage treatment, comprising a centrifugal cylinder (1), characterized in that: The top of the centrifugal cylinder (1) is fixed with an electric control box (2) by bolts, the inner wall of the bottom of the centrifugal cylinder (1) is movably connected with a rotating shaft (3) by a bearing, a gear is sleeved on the output end of the motor installed in the electric control box (2) and meshes with a gear sleeved on the outer wall of the rotating shaft (3), a lifting mechanism (6) is sleeved on the rotating shaft (3), a filter cartridge (9) is sleeved on the outer side of the lifting mechanism (6), and the inner wall of the filter cartridge (9) is evenly provided with sliding grooves (11); The lifting mechanism (6) comprises a sleeve (601) and a baffle (603); the sleeve (601) is slidably connected to the rotating shaft (3); the baffle (603) is fixedly connected to the sleeve (601); the outer wall of the baffle (603) is correspondingly engaged with the sliding groove (11) on the filter cartridge (9), and the baffle (603) is slidably connected to the inner wall of the filter cartridge (9).

2. A centrifugal sedimentation device suitable for sewage treatment according to claim 1, characterized in that: A dirt storage box (5) is installed on the top of the centrifugal cylinder (1), a drainage cavity (4) is opened on the rotating shaft (3), one end of the rotating shaft (3) passes through the centrifugal cylinder (1) and one side of the dirt storage box (5), and the drainage cavity (4) is connected to the dirt storage box (5).

3. A centrifugal sedimentation device suitable for sewage treatment according to claim 2, characterized in that: The lifting mechanism (6) further comprises a limiting groove rod (602), a sealing gasket (604), a sliding rod (605) and a plugging piece (606); the limiting groove rod (602) is symmetrically fixed to the outer wall of the sleeve (601) and located at the bottom of the baffle (603) by spot welding; the sealing gasket (604) is fixed to the top of the baffle (603) by adhesion; one side of the sleeve (601) passes through the drainage cavity (4) and is connected to the sliding rod (605); one end of the sliding rod (605) passes through the drainage cavity (4) and extends into the dirt storage box (5); one end of the sliding rod (605) located in the dirt storage box (5) is fixed to the plugging piece (606) by bolts.

4. A centrifugal sedimentation device suitable for sewage treatment according to claim 3, characterized in that: The rotating shaft (3) is located on the outer wall of the bottom of the sleeve (601) and is symmetrically rotatably connected to a rotating arm (7) through a bearing. One end of the rotating arm (7) is slidably engaged with a slideway on the limiting groove rod (602), and the other end of the rotating arm (7) is fixed with a counterweight ball (8) by spot welding.

5. A centrifugal sedimentation device suitable for sewage treatment according to claim 4, characterized in that: The filter cartridge (9) is evenly provided with mesh holes (10), the outer side of the filter cartridge (9) is fixedly connected to a limiting cylinder (13) located inside the centrifugal cylinder (1), the outer wall of the filter cartridge (9) is evenly embedded with rolling balls (12), and one side of the ball (12) is in contact with the inner wall of the limiting cylinder (13).

6. A centrifugal sedimentation device suitable for sewage treatment according to claim 5, characterized in that: A flow channel (14) is provided on the inner wall of the limiting cylinder (13), a liquid discharge hole (15) is provided on the centrifugal cylinder (1), and slag discharge ports (16) are evenly provided at the bottom of the centrifugal cylinder (1).

7. A centrifugal sedimentation device suitable for sewage treatment according to claim 1, characterized in that: An electric push rod (17) is fixed in the electric control box (2) by bolts, one end of the electric push rod (17) passes through the centrifugal cylinder (1) and is fixedly connected to a placement rod (18), a scraper rod (19) is rotatably connected to the placement rod (18), a spring (20) is installed on one side of the scraper rod (19), and the other end of the spring (20) is fixed to the outer wall of the placement rod (18), a rotating column (21) is movably connected in the electric control box (2), a wire drum (22) is fixedly sleeved on the outer wall of the rotating column (21), a soft steel wire (23) is sleeved on the wire drum (22), and the soft steel wire (23) is connected to one end of the scraper rod (19).

8. A centrifugal sedimentation method suitable for sewage treatment, using a centrifugal sedimentation device suitable for sewage treatment as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: High-speed centrifugal drainage: The motor is started by using the power switch on the electric control box (2). The motor drives the rotating shaft (3) in the centrifugal cylinder (1) to rotate. The sleeve (601) slidably connected to the rotating shaft (3) drives the filter cylinder (9) to rotate at 300 r / min through the baffle (603). The counterweight ball (8) located on the rotating shaft (3) rotates and pushes the baffle (603) to fit the inside of the filter cylinder (9). At this time, the pipeline discharges sewage into the sewage storage box (5). The sewage flows along the drainage cavity (4) on the rotating shaft (3) to the top of the baffle (603) and fits the inner wall of the filter cylinder (9) under high-speed rotation. Impurities in the sewage are adsorbed on the inner wall of the filter cylinder (9), and the filtered water thrown out by centrifugation fits the inner wall of the limit cylinder (13) and is finally discharged through the flow channel (14) and the drainage hole (15) on the centrifugal cylinder (1); Low-speed scraping and slag removal: the rotation time of the high-speed filter cartridge (9) is set, and after the set time is reached, the electric control box (2) actively controls the motor speed to reduce the speed of the filter cartridge (9) connected to the baffle (603) on the rotating shaft (3) to 60r / min. At this time, the suspension height of the counterweight ball (8) is reduced, driving the rotating arm (7) to rotate downward, so that the entire sleeve (601) and the baffle (603) on the sleeve (601) move downward by 5cm, and the sliding rod (605) on the sleeve (601) simultaneously pulls the blocking plate (606) down by 5cm, thereby sealing the drainage cavity (4) on the entire rotating shaft (3); Subsequently, the electric control box (2) controls the electric push rod (17) to push the placement rod (18) to contact the inner wall of the filter cartridge (9). At the same time, the rotating column (21) drives the wire drum (22) to rotate to tighten the soft steel wire (23), thereby pulling the scraper rod (19) on the entire placement rod (18) to rotate, and the electric push rod (17) continues to descend, so as to complete the scraping of the centrifugal impurities on the inner wall of the filter cartridge (9). The solid impurities that fall onto the baffle (603) will be thrown out from the mesh (10) and finally discharged through the slag outlet (16).

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