A centrifugal sedimentation device applicable to sewage treatment

Abstract

The present invention discloses a centrifugal sedimentation device applicable to sewage treatment, which relates to the technical field of sewage centrifugal sedimentation and is used to solve the problem that slag discharge cannot be automatically adjusted according to the load condition of the centrifugal mechanism, and the centrifugal mechanism works under load for a long time, resulting in a reduction in the service life of the equipment. In the present invention, the rotation speed of the rotating shaft is adjusted through an electric control box, and the height adjustment of the counterweight ball connected to the rotating arm is realized by adjusting the rotation speed of the rotating shaft, so that the baffle on the sleeve locks the filter cylinder and abuts against its bottom to assist in rotation. The sliding of the sleeve will also push the blocking piece located in the drainage cavity to move. The continuously incoming sewage enters the bottom of the filter cylinder and completes the centrifugal filtration of the sewage during the rotation of the filter cylinder. When the filtration rate of the filter cylinder decreases, the baffle is automatically pressed down by the weight of the sewage to realize the automatic discharge of the sedimented sewage. Finally, the electric control box starts the electric push rod to push in the scraping rod to complete the cleaning of the inner wall of the filter cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage centrifugal sedimentation, and specifically to a centrifugal sedimentation device suitable for sewage treatment. Background Technique

[0002] Modern wastewater treatment methods are mainly divided into three categories: physical treatment methods, chemical treatment methods, and biological treatment methods. Physical treatment methods are wastewater treatment methods that separate and recover insoluble and suspended pollutants in wastewater through physical actions, and can be divided into gravity separation methods, centrifugal separation methods, and sieve filtration and interception methods, etc. The treatment units belonging to the gravity separation method include: sedimentation, floating (flotation), etc. The corresponding treatment equipment used is grit chambers, sedimentation tanks, oil separation tanks, gas tanks and their auxiliary devices, etc. Centrifuges are commonly used to achieve liquid-solid separation and are suitable for suspensions containing particles larger than 0.01 mm. Sedimentation centrifuges use the sedimentation stratification principle to achieve liquid-solid separation and are suitable for suspensions with tiny particles or particles that can be compressed and deformed;

[0003] Considering the problem of impurity enrichment in the filter cylinder during the centrifugal sedimentation process, as mentioned in the invention patent with the publication number CN111974084A, the rotation and bearing of the centrifugal cylinder are realized by setting a rotating mechanism, the precipitation of solid sediments is realized by setting a centrifugal cylinder, and the discharge of sediments at the bottom of the centrifugal cylinder is realized by setting a lifting mechanism. However, during the centrifugation process, the amount of impurities adsorbed on the inner wall of the centrifugal cylinder gradually increases, and the equipment cannot automatically detect it, resulting in a decrease in the centrifugal drainage rate of the subsequent centrifugal cylinder. And the water inlet without water volume control continuously discharges liquid, which easily leads to an increase in the load of the motor and a reduction in the service life of the working equipment.

[0004] Therefore, we propose a centrifugal sedimentation device suitable for sewage treatment. Summary of the Invention

[0005] The purpose of the present invention is to provide a centrifugal sedimentation device suitable for sewage treatment to solve the problems mentioned in the above background technique, that is, during centrifugation, slag discharge cannot be automatically adjusted according to the load of the centrifugal mechanism, and the centrifugal mechanism works under long-term load, resulting in a reduction in the equipment life;

[0006] To achieve the above purpose, the present invention provides the following technical solution: A centrifugal sedimentation device suitable for sewage treatment, including a centrifugal cylinder, the top of the centrifugal cylinder is fixedly connected by bolts with an electric control box, the bottom inner wall of the centrifugal cylinder is movably connected by a bearing with a rotating shaft, the output end of a motor installed in the electric control box is sleeved with a gear that meshes with a gear sleeved on the outer wall of the rotating shaft, a lifting mechanism is sleeved and installed on the rotating shaft, the outside of the lifting mechanism is sleeved and connected with a filter cylinder, and the inner wall of the filter cylinder is evenly provided with sliding grooves;

[0007] The lifting mechanism includes a sleeve and a baffle. A sleeve is slidably connected to the rotating shaft, and a baffle is fixedly connected to the sleeve. The outer wall of the baffle is correspondingly clamped with the chute on the filter cartridge, and the baffle is slidably connected to the inner wall of the filter cartridge.

[0008] Further, a dirt storage box is installed at the top of the centrifugal cylinder. A drainage cavity is provided on the rotating shaft. One end of the rotating shaft penetrates through the centrifugal cylinder and one side of the dirt storage box respectively, and the drainage cavity is communicated with the dirt storage box.

[0009] Further, the lifting mechanism further includes a limit groove rod, a sealing gasket, a sliding rod and a blocking piece. The limit groove rod is symmetrically fixed to the outer wall of the sleeve and at the bottom of the baffle by spot welding. The sealing gasket is fixedly adhered to the top of the baffle. One side of the sleeve penetrates through the drainage cavity and is connected with a sliding rod. One end of the sliding rod penetrates through the drainage cavity and extends into the dirt storage box. A blocking piece is fixed to the end of the sliding rod located in the dirt storage box by a bolt.

[0010] Further, the rotating shaft is symmetrically rotatably connected to a rotating arm through a bearing on the outer wall at the bottom of the sleeve. One end of the rotating arm is slidably clamped with the slideway on the limit groove rod, and a counterweight ball is fixedly connected to the other end of the rotating arm by spot welding.

[0011] Further, the filter cartridge is evenly provided with mesh holes. A limit cylinder is fixedly connected to the outside of the filter cartridge and inside the centrifugal cylinder. The outer wall of the filter cartridge is evenly embedded and rotatably connected with rolling balls, and one side of the rolling balls abuts against the inner wall of the limit cylinder.

[0012] Further, a flow channel is provided on the inner wall of the limit cylinder. A liquid discharge hole is provided on the centrifugal cylinder. The bottom of the centrifugal cylinder is evenly provided with slag discharge ports.

[0013] Further, an electric push rod is fixedly connected to the inside of the electric control box by a bolt. One end of the electric push rod penetrates through the centrifugal cylinder and is fixedly connected to a placement rod. A scraping rod is rotatably connected to the placement rod. A spring is installed on one side of the scraping rod, and the other end of the spring is fixed to the outer wall of the placement rod. A rotating column is movably connected to the inside of the electric control box. A wire reel is sleeved and fixed on the outer wall of the rotating column. A soft steel wire is wound and sleeved on the wire reel, and the soft steel wire is connected to one end of the scraping rod.

[0014] The centrifugal sedimentation method applicable to sewage treatment is as follows:

[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 Schematic diagram of the connection structure of the lifting mechanism on the rotating shaft of the present invention;

[0023] Figure 4 Schematic diagram of the installation structure of the sealing gasket on the baffle of the present invention;

[0024] Figure 5 Schematic diagram of the overall structure of the limiting cylinder of the present invention;

[0025] Figure 6 Schematic diagram of the installation structure of the placing rod at the front end of the electric push rod of the present invention;

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

[0027] In the figure: 1, centrifugal cylinder; 2, electric control box; 3, rotating shaft; 4, drainage cavity; 5, sewage storage tank; 6, lifting mechanism; 601, sleeve; 602, limiting groove rod; 603, baffle; 604, sealing gasket; 605, sliding rod; 606, blocking piece; 7, rotating arm; 8, counterweight ball; 9, filter cylinder; 10, mesh holes; 11, sliding groove; 12, ball; 13, limiting cylinder; 14, flow channel; 15, liquid discharge hole; 16, slag discharge port; 17, electric push rod; 18, placing rod; 19, scraping rod; 20, spring; 21, rotating column; 22, wire reel; 23, soft steel wire. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figure 1-7 , the present invention provides a technical solution:

[0030] Embodiment 1: Through speed control, automatic sewage feeding and slag discharging are realized, and the degree of automation is high. As Figure 1 shown, a rotating shaft 3 is movably connected inside 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 main body of the rotating shaft 3 is solid, and the upper side is hollow, with a drainage cavity 4 opened. A hole is opened in the centrifugal cylinder 1 for the drainage cavity 4, so that when one end of the drainage cavity 4 is filled with water, the water automatically drains into the filter cylinder 9;

[0031] For the chamber for centrifugal filtration, it is jointly composed of the installation of the filter cylinder 9 and the baffle 603. As 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 is slidably connected to the rotating shaft 3 itself. At the same time, the sleeve 601 extends into the chamber of the drainage chamber 4 and is fixedly connected to the slide bar 605 in the drainage chamber 4. Therefore, the sliding of the sleeve 601 is accompanied by the movement of the slide bar 605 in the drainage chamber 4;

[0032] At the same time, a baffle 603 is fixedly connected to the sleeve 601. The entire structure of the baffle 603 is as Figure 4 shown. A protrusion is provided on the outside and is clamped in the chute 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 onto the baffle 603 and the filter cartridge 9, and centrifugal filtration operation is carried out through the rotation of the rotating shaft 3;

[0033] Considering that the sliding of the sleeve 601 will cause some sewage to flow downward, it is necessary to carry out the fitting work between the baffle 603 and the filter cartridge 9 during the centrifugation process. On the outer wall of the rotating shaft 3 and at the bottom of the baffle 603, there are symmetrically rotatably connected to the rotating arms 7 through bearings. The rotating arms 7 are "L"-shaped. One end is fixedly welded with a counterweight ball 8, and the other end is clamped with the limit groove rod 602 on the sleeve 601. When the entire rotating shaft 3 rotates, the generated centrifugal force drives the counterweight ball 8 to float. At the same time, the rising of the counterweight ball 8 drives the rotating arm 7 to rotate obliquely upward. Therefore, the entire sleeve 601 and the baffle 603 on the sleeve 601 are pushed upward to realize the abutment of the top of the baffle 603 against the filter cartridge 9. The sealing gasket 604 adhered to the top of the baffle 603 has improved sealing performance after being extruded, further preventing sewage from flowing out from the abutting side of the baffle 603 and the filter cartridge 9;

[0034] When the rotational speed of the rotating shaft 3 decreases, at this time, the counterweight ball 8 moves downward by a certain distance due to the action of gravity, resulting in the downward movement of the sleeve 601 connected to the entire baffle 603 on the surface of the rotating shaft 3, and the abutting position between the baffle 603 and the filter cartridge 9 changes, which is used for the discharge of the dirt adhered to the surface of the filter cartridge 9 subsequently;

[0035] At the same time, due to the downward movement of the entire sleeve 601 on the outer wall of the rotating shaft 3, the slide bar 605 connected to the sleeve 601 in the drainage chamber 4 drives the plug 606 installed on the top to move downward, as Figure 2As shown in the figure, one end of the entire rotating shaft 3 extends into the sewage storage tank 5 installed at the top of the centrifugal cylinder 1. The sewage stored in the sewage storage tank 5 will flow into the top of the baffle 603 through the drainage cavity 4. When the rotating shaft 3 rotates at a high speed, the rising sliding rod 605 pushes the blocking piece 606 to move. The water inlet of the drainage cavity 4 for sealing has no blocking piece 606 abutting against it, and the sewage automatically flows in. When the rotation speed of the entire rotating shaft 3 decreases, at this time, the blocking piece 606 on the sliding rod 605 presses down the end of the drainage cavity 4 to prevent the continuous discharge of sewage, thereby controlling the continuous internal discharge of sewage. For the sewage entering from the drainage cavity 4 during the gradual change of the rotation speed of the rotating shaft 3, it will play a role in flushing the surface of the baffle 603, completing the flushing of the baffle 603 and the mesh holes 10 at the bottom of the filter cartridge 9;

[0036] Considering that the filter cartridge 9 needs to rotate at a high speed inside the limiting cylinder 13 to improve 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. The balls 12 are engaged with the arc grooves on the limiting cylinder 13 to prevent 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 discharging methods of the sewage treatment centrifugal sedimentation device, 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 tank 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 adhering to the inner wall of the filter cartridge 9. At this time, the centrifugal drainage rate decreases, and the water inflow is greater than the water outflow. The sewage on the filter cartridge 9 begins to precipitate. At the same time, considering the reason of the self-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 outward from the mesh holes 10, and the reduction of the sewage will be lifted by the rotation of the counterweight ball 8, automatically completing the external discharge of the precipitated sewage;

[0038] However, considering the long-term blockage of the inner wall of the filter cartridge 9 by sludge impurities, it will also cause some sewage with a high impurity content to be directly discharged without filtration. At this time, it is necessary to scrape the sludge adhering to the inner wall of the filter cartridge 9. A trigger can be installed at the bottom of the baffle 603. Whether it is the normal high-speed rotation of the rotating shaft 3 that causes the baffle 603 to descend, or the problem of the baffle 603 descending due to the reduction of the rotation speed, it will trigger the operation of the electric push rod 17 in the electric control box 2, and the trigger directly monitors the height of the baffle 603;

[0039] After the high-speed rotating shaft 3 realizes the preliminary discharge of sewage, at this time, the high-speed rotation and the centrifugal filtration of the filter cartridge 9 complete the discharge of the filtered sewage. 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. There are liquid discharge holes 15 opened on the outer wall of the centrifugal cylinder 1, as Figure 1As shown, the filtered sewage will be directly discharged. However, the internal discharge of the subsequent sewage and the accumulation of impurities on the inner wall of the filter cartridge 9 will cause the centrifugal discharge rate to decrease. After reaching the critical value of the rotation of the counterweight ball 8, the baffle 603 will be driven to descend. At this time, a trigger can be controlled to start transmitting a signal. When the processor in the electric control box 2 receives the signal, it immediately controls the electric push rod 17 to push the placement rod 18 to slide downward;

[0040] As Figure 5 shown, one side of the placement rod 18 is movably connected with a scraping rod 19. A scraping blade is arranged at the front end of the scraping rod 19. At the same time, a spring 20 is connected between the scraping rod 19 and the placement rod 18. A soft steel wire 23 is tied to the other end of the scraping rod 19. Considering the uncertainty of the thickness of the sludge deposited on the inner wall of the filter cartridge 9, when directly setting a corresponding scraping plate for abutting and scraping, it is easy to cause damage to the scraping plate. Therefore, an upper rotating column 21 is also arranged in the electric control box 2. A wire reel 22 is sleeved and fixed on the rotating column 21. One end of the soft steel wire 23 is connected to the wire reel 22. By pulling one end of the scraping rod 19 through the soft steel wire 23, the scraping rod 19 is driven to rotate, changing the contact distance between the scraping rod 19 and the inner wall of the filter cartridge 9;

[0041] When the electric push rod 17 pushes the scraping rod 19 to move to the inner wall of the bottom of the filter cartridge 9, while the placement rod 18 moves, the wire reel 22 pays out wire at a constant rate. When removing impurities, the rotating column 21 rotates to wind up the soft steel wire 23. The soft steel wire 23 is used to pull the scraping rod 19 to rotate, and the scraping rod 19 gradually contacts the impurities on the inner wall of the filter cartridge 9. Cooperating with the rotation of the filter cartridge 9 and the continuous rising of the electric push rod 17, the inner wall of the filter cartridge 9 is cleaned;

[0042] However, considering that the scraped impurities will reattach to the inner wall of the filter cartridge 9 under the high-speed centrifugal state, at this time, the electric control box 2 will also control the motor speed, that is, control the centrifugal suspension height of the counterweight ball 8 on the rotating shaft 3, to realize the height control of the baffle 603 at the bottom of the filter cartridge 9, so that the precipitated sewage is discharged from the mesh holes 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 discharge of materials is automatically pressed down, which avoids the problem of the liquid level rising in the filter cartridge due to the blockage of the inner wall of the filter cartridge 9 and the reduction of the centrifugal drainage rate, and also avoids the long-term load rotation of the motor in the electric control box 2, extending the overall service life of the motor;

[0043] For another working mode of the centrifugal cylinder 1, it is to directly set the high-speed rotation time of the rotating shaft 3, which is usually applicable to the condition of less sewage impurity content. The high-speed rotating filter cartridge 9 completes the full filtration of the sewage. Therefore, the filter cartridge 9 only considers the mass of the adsorbed impurities and its own weight. After reaching the set time, the electric push rod 17 at the end is directly controlled to drive the scraping rod 19 to remove impurities, and at the same time, the rotation speed of the rotating shaft 3 is controlled to complete the removal of wet impurities.

[0044] Working principle of the present invention: Start the motor by using the power switch on the electric control box 2. The motor drives the rotation of the rotating shaft 3 in the centrifugal cylinder 1. 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 inside the filter cylinder 9. At this time, the pipeline discharges sewage into the sewage storage tank 5. The sewage flows along the drainage cavity 4 on the rotating shaft 3 to the top of the baffle 603 and adheres to the inner wall of the filter cylinder 9 under high-speed rotation. The impurities in the sewage are adsorbed on the inner wall of the filter cylinder 9, and the filtered water centrifugally thrown out adheres to the inner wall of the limiting cylinder 13 and finally discharges through the flow channel 14 and the liquid discharge hole 15 on the centrifugal cylinder 1;

[0045] Set the rotation time of the high-speed filter cylinder 9. After reaching the set time, the electric control box 2 actively controls the motor speed to reduce the rotation speed of the filter cylinder 9 connected to the baffle 603 on the rotating shaft 3 to 60 r / min. At this time, the suspension height of the counterweight ball 8 decreases, driving the rotating arm 7 to rotate downward, causing the entire sleeve 601 and the baffle 603 on the sleeve 601 to move downward by 5 cm. The sliding rod 605 on the sleeve 601 simultaneously pulls the blocking piece 606 down by 5 cm to close 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 cylinder 9. At the same time, the rotating column 21 drives the wire reel 22 to rotate to tighten the soft steel wire 23, pulling the scraping rod 19 on the entire placement rod 18 to rotate. In cooperation with the continuous descent of the electric push rod 17, the centrifugal impurities on the inner wall of the filter cylinder 9 are scraped off. The solid impurities falling on the baffle 603 will be thrown out from the mesh holes 10 and finally discharged through the slag outlet 16.

[0047] The above content is only an example and description of the structure of the present invention. Those skilled in the art of the present technology make various modifications or supplements to the described specific embodiments or use similar methods to replace them. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should fall within the protection scope of the present invention.

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

[0049] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments only. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited 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 slide groove (11) on the filter cartridge (9), and the baffle (603) is slidably connected to the inner wall of the filter cartridge (9). 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). 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; 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 limit groove rod (602), and the other end of the rotating arm (7) is fixed with a counterweight ball (8) by spot welding.

2. A centrifugal sedimentation device suitable for sewage treatment according to claim 1, 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), and 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).

3. A centrifugal sedimentation device suitable for sewage treatment according to claim 2, 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 on the bottom of the centrifugal cylinder (1).

4. 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).

5. 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 4, 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 plate (603) on the rotating shaft (3) to 60 r / 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 plate (603) on the sleeve (601) move downward by 5 cm, and the sliding rod (605) on the sleeve (601) simultaneously pulls the blocking plate (606) down by 5 cm, 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 reel (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, thereby completing the scraping of the centrifugal impurities on the inner wall of the filter cartridge (9). The solid impurities that fall onto the baffle (603) are thrown out from the mesh (10) and finally discharged through the slag outlet (16).

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