A sedimentation tank for sewage treatment

Abstract

The present invention discloses a sedimentation tank for sewage treatment, which includes a sedimentation mechanism. Above the sedimentation mechanism, there is a sewage pumping pump, and the output port of the sewage pumping pump is fixedly connected with a sewage discharge pipe. A drying frame is arranged on the outer wall of the sedimentation mechanism, and a scraping mechanism is arranged inside the sedimentation mechanism. The scraping mechanism is used for loosening the sludge and scraping and piling up the sludge. A sewage pumping mechanism is arranged inside the sedimentation mechanism, and the sewage pumping mechanism is used for pumping out the piled-up sludge. By means of the cooperation of the scraping mechanism and the sewage pumping mechanism, the loosening component on the scraping mechanism facilitates the loosening of the sludge at the bottom of the tank body, enabling its scraper to pile up the sludge in the inner cavity of the tank body on one side, so that the sewage pumping mechanism can stably pump out the sludge into the inner cavity of the drying frame, facilitating the use of the sludge as fertile soil fertilizer, and improving the sewage pumping efficiency while being convenient for sewage pumping.

Description

Technical Field

[0001] The present invention relates to the technical field of sedimentation tanks, and particularly relates to a sedimentation tank for sewage treatment. Background Technique

[0002] A sedimentation tank is a structure that uses sedimentation to remove suspended solids in water. A sedimentation tank is generally a structure for separating muddy water before or after biochemical treatment. It is mostly used to separate sludge with finer particles. The one before biochemical treatment is called the primary sedimentation tank, and the sedimented sludge has more inorganic components, and the moisture content of the sludge is lower than that of the secondary sedimentation tank sludge. The sedimentation tank located after biochemical treatment is generally called the secondary sedimentation tank, mostly organic sludge, and the moisture content of the sludge is higher.

[0003] In sewage treatment technology, in order to ensure the treatment effect, the sludge at the bottom of the sedimentation tank needs to be treated after a certain period of use to prevent excessive sludge accumulation from affecting the sewage treatment efficiency. Currently, the sludge is generally pumped out by a sewage pump. However, since the inner cavity of the sedimentation tank is generally large, the sludge suction pipe at the end of the sewage pump cannot be completely distributed at the bottom of the sedimentation tank for sludge suction. Moreover, due to some sludge being too hard to accumulate, the sludge cannot be loosened, resulting in the sludge not being efficiently pumped out of the inner cavity of the sedimentation tank, leading to low treatment efficiency of the sludge at the bottom of the sedimentation tank. Summary of the Invention

[0004] The purpose of the present invention is to provide a sedimentation tank for sewage treatment to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A sedimentation tank for sewage treatment, comprising:

[0006] A sedimentation mechanism, above which there is a sewage pump, and the output port of the sewage pump is fixedly connected to a sewage outlet pipe;

[0007] A drying frame is arranged on the outer wall of the sedimentation mechanism, and a scraping mechanism is arranged in the inner cavity of the sedimentation mechanism, and the scraping mechanism is used for sludge loosening and sludge scraping and accumulation;

[0008] A sewage pumping mechanism is arranged in the inner cavity of the sedimentation mechanism, and the sewage pumping mechanism is used for pumping out the accumulated sludge.

[0009] Preferably, the sedimentation mechanism includes a tank body, a cleaning pipe, and a water outlet pipe. The cleaning pipe is fixedly inserted through the bottom of the tank body, and the water outlet pipe is fixedly inserted through one side of the tank body.

[0010] Preferably, the scraping mechanism includes a support rod, a servo motor, a positioning component, two scraping plates, a plurality of loosening components, and two snap rings. The support rod is fixed to the top of the inner wall of the pool body. The servo motor is fixedly arranged on the upper surface of the support rod. The positioning component is arranged at the bottom of the servo motor. The two scraping plates are respectively fixed to both sides of the positioning component. The bottoms and the opposite ends of the two scraping plates are rotatably and scrapingly connected to the inner wall of the pool body. The two snap rings are respectively fixed to the tops of the two scraping plates. The plurality of loosening components are respectively arranged at equal intervals on the opposite sides of the two scraping plates. The bottom of the sewage pumping mechanism is arranged on the opposite sides of the two scraping plates.

[0011] Preferably, the positioning component includes a rotating column, a top rod, and a round head. The top of the rotating column is rotatably inserted through the middle of the support rod through a bearing. The rotating column is in transmission connection with the output end of the servo motor. The top rod is fixed to the bottom end of the rotating column. The round head is arranged at the bottom end of the top rod. The two scraping plates are respectively fixedly connected to both sides of the outer wall of the rotating column.

[0012] Preferably, the loosening component includes a push rod, an arc rod, and a plurality of loosening rods. The plurality of push rods are inserted and fixed at equal intervals on the tops of the two scraping plates. The arc rod is fixedly connected to the bottom of the adjacent push rod. The plurality of loosening rods are fixed at equal intervals on the bottom of the arc rod. The bottom of the arc rod is in sliding connection with the bottom end of the inner wall of the pool body.

[0013] Preferably, the sewage pumping mechanism includes a rotating groove, a plurality of rotating components, a support plate, a connecting pipe, two sludge suction pipes, two sludge suction heads, a plurality of protection components, two extension frames, and a plurality of connecting components. The rotating groove is opened at the top of the pool body. The plurality of rotating components are arranged at equal intervals at the bottom of the support plate. The rotating components are in sliding connection with the inner cavity of the rotating groove. The support plate is rotatably connected to the top of the pool body. The support plate is fixedly connected to the bottom of the sewage pump. The connecting pipe is fixedly inserted through the inner cavity of the support plate. The two sludge suction pipes are respectively fixedly inserted and connected to both ends of the connecting pipe. The two sludge suction heads are respectively fixed to the bottom ends of the sludge suction pipes. The bottom of the sludge suction pipe is movably clamped in the inner cavity of the snap ring. The plurality of protection components are arranged at equal intervals at the bottom of the sludge suction head. The extension frame is fixed to the bottom end of the sludge suction head. The plurality of connecting components are arranged between the support plate and the rotating column.

[0014] Preferably, the protection component includes an activity groove, an activity frame, a fixed rod, a compression spring, a protection block, and a ball. The plurality of activity grooves are opened at equal intervals at the bottom of the sludge suction head. The fixed rod is in sliding connection with the inner cavity of the activity frame. The compression spring is fixed between the fixed rod and the bottom of the activity frame. The ball is embedded in the bottom of the protection block.

[0015] Preferably, the sludge suction head is arranged on one side of the scraper. The movable frame is slidably inserted into the inner cavity of the movable groove. Both ends of the fixed rod are fixedly connected to the inner wall of the movable groove. The protective block is fixed to the bottom end of the movable frame. The ball is in rolling connection with the bottom of the inner wall of the pool body.

[0016] Preferably, the connection assembly includes a connecting rod, a T-shaped groove, a sliding rod and a clamping rod. A plurality of the connecting rods are fixedly arranged at equal intervals on the lower surface of the inner side of the support plate. The T-shaped groove is opened at the bottom of the connecting rod. One end of the sliding rod is slidably inserted into one end of the clamping rod. One end of the sliding rod is of a T-shaped structure. The other end of the sliding rod is of a hook structure. One end of the clamping rod is fixed to the outer wall of the rotating column. The other end of the sliding rod is slidably inserted into the other end of the clamping rod.

[0017] Preferably, the rotating assembly includes a rotating block, a limiting rod and two rollers. The rotating block is fixed to the lower surface of the support plate. The limiting rod is fixedly inserted through the bottom of the rotating block. The two rollers are respectively rotatably inserted through both ends of the limiting rod through bearings.

[0018] The technical effects and advantages of the present invention:

[0019] (1) By using the cooperation setting of the scraping mechanism and the sewage pumping mechanism, and through the loosening component on the scraping mechanism, it is convenient to loosen the sludge at the bottom of the pool body, so that the scraper can accumulate the sludge in the inner cavity of the pool body on one side of the scraper, and the sewage pumping mechanism can stably pump the sludge into the inner cavity of the drying frame, which is convenient for the sludge to be used as fertile soil fertilizer. While the sewage pumping is convenient, the sewage pumping efficiency can be improved.

[0020] (2) By using the cooperation setting of the protection component and the connection component, through the protection component, the bottom of the sludge suction head can be protected and supported to a certain extent, which is convenient for the sludge to flow into the bottom of the inner cavity of the sludge suction head, and is convenient for the sludge with high water content to be sucked conveniently. And through the setting of the connection component, the sludge suction head and the support plate can stably rotate with the scraper, preventing phenomena such as the winding of the sludge suction pipe, improving the stability during the sludge suction process, facilitating the stable use of the sedimentation tank, and making the treatment of sewage not affected by the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a schematic diagram of the front sectional structure of the pool body of the present invention;

[0023] Figure 3 is a schematic diagram of the front sectional structure of the pool body of the present invention;

[0024] Figure 4Schematic side sectional view structure of the push rod of the present invention;

[0025] Figure 5 For the present invention Figure 3 Schematic enlarged partial structure view at position A in the present invention;

[0026] Figure 6 For the present invention Figure 3 Schematic enlarged partial structure view at position B in the present invention;

[0027] Figure 7 For the present invention Figure 3 Schematic enlarged partial structure view at position C in the present invention.

[0028] In the figure: 1. precipitation mechanism; 11. pool body; 12. cleaning pipe; 13. water outlet pipe; 2. sewage pumping pump; 3. sewage outlet pipe; 4. drying frame; 5. scraping mechanism; 51. support rod; 52. servo motor; 53. positioning component; 531. rotating column; 532. ejector rod; 533. round head; 54. scraper; 55. loosening component; 551. push rod; 552. arc rod; 553. loosening rod; 56. snap ring; 6. sewage pumping mechanism; 61. rotating groove; 62. rotating component; 621. rotating block; 622. limiting rod; 623. roller; 63. support plate; 64. connecting pipe; 65. sludge suction pipe; 66. sludge suction head; 67. protection component; 671. moving groove; 672. moving frame; 673. fixed rod; 674. compression spring; 675. protection block; 676. ball; 68. lengthening frame; 69. connecting component; 691. connecting rod; 692. T-shaped groove; 693. sliding rod; 694. clamping rod. Detailed implementation manners

[0029] 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.

[0030] The present invention provides a sewage sedimentation tank as Figure 1-7 shown, including:

[0031] The sedimentation mechanism 1 comprises a tank body 11, a cleaning pipe 12 and a water outlet pipe 13. The tank body 11 is a circular tank structure, and the bottom of the tank body 11 can be buried in the soil. The cleaning pipe 12 is fixedly inserted at the bottom of the tank body 11, so that the sewage at the bottom of the tank body 11 can be discharged. The water outlet pipe 13 is fixedly inserted at one side of the tank body 11. The water outlet pipe 13 has a certain distance from the bottom of the inner cavity of the tank body 11, so that the water after sedimentation can be discharged. A sewage pump 2 is arranged above the sedimentation mechanism 1, and the output port of the sewage pump 2 is fixedly connected to the sewage outlet pipe 3, so that the sludge can be pumped out from the inner cavity of the sewage outlet pipe 3;

[0032] The outer wall of the sedimentation mechanism 1 is provided with a drying frame 4, which is a circular ring frame structure. The drying frame 4 is fixed to the top of the outer wall of the tank body 11 and can carry the sludge. The inner cavity of the sedimentation mechanism 1 is provided with a scraping mechanism 5, which is used to loosen the sludge and scrape and accumulate the sludge.

[0033] The scraping mechanism 5 includes a support rod 51, a servo motor 52, a positioning assembly 53, two scrapers 54, a plurality of loosening assemblies 55 and two clamping rings 56. The support rod 51 is fixed to the top of the inner wall of the pool body 11. The servo motor 52 is fixedly arranged on the upper surface of the support rod 51. The support rod 51 is used for position support of the servo motor 52. The servo motor 52 is electrically connected to an external power supply through an external switch. The positioning assembly 53 is arranged at the bottom of the servo motor 52. The positioning assembly 53 includes a rotating column 531, a top rod 532 and a round head 533. The top of the rotating column 531 is rotatably connected with the middle part of the support rod 51 through a bearing, the rotating column 531 is transmission-connected with the output end of the servo motor 52, the top rod 532 is fixed to the bottom end of the rotating column 531, and the round head 533 is arranged at the bottom end of the top rod 532. The round head 533 is a hemispherical structure, and the round head 533 is fixed to the bottom end of the top rod 532, so that the round head 533 can fit with the middle part of the inner wall of the pool body 11, so that the top rod 532 can stably support the rotating column 531, which is convenient for the stability of the rotating column 531 when rotating;

[0034] The two scrapers 54 are fixed to the two sides of the positioning assembly 53, and the two scrapers 54 are fixedly connected to the two sides of the outer wall of the rotating column 531. The bottom and the opposite ends of the two scrapers 54 are rotatably connected to the inner wall of the tank body 11, so that the scrapers 54 can scrape the sludge at the bottom of the tank body 11, so that the sludge can be arranged in two piles on one side of the two scrapers 54.

[0035] A plurality of loose components 55 are respectively arranged at equal intervals on the opposite sides of the two scraping plates 54. Two clamping rings 56 are respectively fixed to the tops of the two scraping plates 54. The loose component 55 includes a push rod 551, an arc rod 552 and a plurality of loose rods 553. The push rod 551 is of a curved arc structure, and the arc rod 552 is of a semi-circular arc structure. A plurality of push rods 551 are fixedly inserted at equal intervals at the tops of the two scraping plates 54. The arc rod 552 is fixedly connected to the bottom of the adjacent push rod 551. A plurality of loose rods 553 are fixedly arranged at equal intervals at the bottom of the arc rod 552. The bottom of the arc rod 552 is in sliding fit with the bottom end of the inner wall of the pool body 11. Through the pushing of the scraping plate 54, it is convenient for the push rod 551 to push the plurality of loose rods 553 on the arc rod 552 to move, so that the loose rods 553 can penetrate and slide the precipitated sludge, facilitating the loosening of the sludge and making the suction of the sludge more convenient;

[0036] A sewage pumping mechanism 6 is arranged in the inner cavity of the precipitation mechanism 1. The sewage pumping mechanism 6 is used for pumping out the accumulated sludge. The bottom of the sewage pumping mechanism 6 is arranged on the opposite sides of the two scraping plates 54. The sewage pumping mechanism 6 includes a rotating groove 61, a plurality of rotating components 62, a support plate 63, a connecting pipe 64, two sludge suction pipes 65, two sludge suction heads 66, a plurality of protection components 67, two extension frames 68 and a plurality of connecting components 69. The rotating groove 61 is opened at the top end of the pool body 11. A plurality of rotating components 62 are arranged at equal intervals at the bottom of the support plate 63. The rotating component 62 is slidably connected to the inner cavity of the rotating groove 61. The rotating component 62 includes a rotating block 621, a limiting rod 622 and two rollers 623. The rotating block 621 is fixed to the lower surface of the support plate 63. The limiting rod 622 is fixedly inserted and connected to the bottom of the rotating block 621. The rotating block 621 is slidably connected to the inner cavity of the rotating groove 61, facilitating the stable support of the support plate 63 on the top of the pool body 11. The two ends of the limiting rod 622 are respectively slidably inserted and connected to the two sides of the bottom of the inner wall of the rotating groove 61. The two rollers 623 are respectively rotatably inserted and connected to the two ends of the limiting rod 622 through bearings, facilitating the smooth sliding of the support plate 63 on the top of the pool body 11 through the rollers 623;

[0037] The support plate 63 is of an annular plate structure. The support plate 63 is rotatably connected to the top of the pool body 11. The support plate 63 is fixedly connected to the bottom of the sewage pump 2. The connecting pipe 64 is fixedly inserted into the inner cavity of the support plate 63. The two sludge suction pipes 65 are respectively fixedly inserted and connected to the two ends of the connecting pipe 64. The tops of the two sludge suction pipes 65 are fixedly inserted and connected to the two ends of the support plate 63, facilitating the stable arrangement of the two sludge suction pipes 65 at the two ends of the bottom of the support plate 63. The bottom of the sludge suction head 66 is of a flat structure, facilitating the reduction of the space in the inner cavity of the sludge suction head 66 during adsorption, improving the negative pressure adsorption force, and facilitating the stable adsorption of the flowing sludge. The two sludge suction heads 66 are respectively fixed to the bottom ends of the sludge suction pipes 65. The bottom of the sludge suction pipe 65 is movably clamped in the inner cavity of the clamping ring 56, facilitating the stable arrangement of the sludge suction head 66 on one side of the scraping plate 54;

[0038] A plurality of protection components 67 are equidistantly arranged at the bottom of the mud suction head 66. The mud suction head 66 is arranged on one side of the scraper 54. The extension frame 68 is fixed to the bottom end of the mud suction head 66, which is convenient for blocking the bottom of the movable frame 672 to a certain extent, reducing the influence of the adsorption force on the movement of the movable frame 672, enabling the protection component 67 to stably protect the bottom of the mud suction head 66, and reducing the friction influence between the mud suction head 66 and the inner wall of the pool body 11;

[0039] The protection component 67 includes a movable groove 671, a movable frame 672, a fixed rod 673, a compression spring 674, a protection block 675 and a ball 676. The movable frame 672 is of a long rectangular frame structure. A plurality of movable grooves 671 are equidistantly opened at the bottom of the mud suction head 66. The fixed rod 673 is slidably connected to the inner cavity of the movable frame 672. The compression spring 674 is fixed between the fixed rod 673 and the bottom of the movable frame 672. A smooth rod is inserted through the inner cavity of the compression spring 674. Both ends of the smooth rod are fixedly connected to both ends of the inner wall of the movable frame 672. The smooth rod is slidably inserted through the middle of the fixed rod 673, which is convenient for the protection block 675 to elastically support at the bottom of the mud suction head 66 through the elasticity of the compression spring 674. The movable frame 672 is slidably inserted through the inner cavity of the movable groove 671. Both ends of the fixed rod 673 are fixedly connected to the inner wall of the movable groove 671. The protection block 675 is fixed to the bottom end of the movable frame 672. The ball 676 is rollingly connected to the bottom of the inner wall of the pool body 11. The ball 676 is embedded in the bottom of the protection block 675, which is convenient for stably supporting the mud suction head 66 and for the mud suction head 66 to stably move following the scraper 54;

[0040] A plurality of connection components 69 are arranged between the support plate 63 and the rotating column 531. The connection component 69 includes a connecting rod 691, a T-shaped groove 692, a sliding rod 693 and a clamping rod 694. A plurality of connecting rods 691 are equidistantly fixed to the lower surface of the inner side of the support plate 63. The T-shaped groove 692 is opened at the bottom of the connecting rod 691. One end of the sliding rod 693 is of a T-shaped structure. One end of the sliding rod 693 is slidably inserted through the inner cavity of the T-shaped groove 692. The other end of the sliding rod 693 is of a hook structure. One end of the sliding rod 693 is slidably inserted through one end of the clamping rod 694. One end of the clamping rod 694 is fixed to the outer wall of the rotating column 531. The other end of the sliding rod 693 is slidably inserted through the other end of the clamping rod 694. By slidably inserting the sliding rod 693 and the clamping rod 694, it is convenient for the rotating column 531 to stably drive the support plate 63 to move stably, improving the stability during the sludge suction process.

[0041] The working principle of the present invention:

[0042] After the water sedimented at the bottom of the sedimentation tank body 11 is discharged through the water outlet pipe 13, only residual sewage and sludge remain in the inner cavity of the tank body 11. Driven by the servo motor 52, the rotating column 531 can rotate stably, so that the round head 533 at the bottom of its ejector rod 532 can stably push against the bottom of the rotating column 531, enabling the two scraping plates 54 to rotate around the rotating column 531 as the axis. The loose rods 553 in the rotating direction of the two scraping plates 54 can penetrate among the sedimented sludge, facilitating the loosening of the sludge sedimented together. The scraping plates 54 connected to the push rods 551 can scrape the sludge behind the loose rods 553, facilitating the scraping of the sludge sedimented at the bottom of the tank body 11 together, enabling the sludge to accumulate on one side of the two scraping plates 54 facing away from each other. At the same time, through the connection between the sliding rod 693 and the clamping rod 694, the support rod 51 can also rotate stably on the top of the tank body 11 following the rotating column 531, keeping the sludge suction head 66 stable on one side of the scraping plate 54;

[0043] By starting the sewage pump 2, the inner cavity of the connecting pipe 64 is in a negative pressure state, and the sludge suction heads 66 at the bottoms of the two sludge suction pipes 65 are in a negative pressure adsorption state, facilitating the adsorption of the sludge on one side of the scraping plate 54. Moreover, due to the flat structure at the bottom of the sludge suction head 66, it is convenient to adsorb more sludge. The sludge is pumped out from the inner cavity of the sewage outlet pipe 3 through the sewage pump 2 into the inner cavity of the drying frame 4, facilitating the temporary storage of the pumped-out sludge by the drying frame 4. The sludge can be dried and used as fertilizer for fertile soil, improving the utilization efficiency of the sludge. Finally, after the remaining sludge is washed with clean water, the sewage is discharged from the inner cavity of the cleaning pipe 12, facilitating the stable cleaning of the inner cavity of the sedimentation tank, improving the convenience and high efficiency of sludge cleaning, facilitating the repeated sedimentation treatment of sewage, and improving the practicality of the sedimentation tank.

[0044] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sedimentation tank for sewage treatment, comprising: A sedimentation mechanism (1), above which a sewage pumping pump (2) is arranged, and an outlet pipe (3) is fixedly connected to the output port of the sewage pumping pump (2); It is characterized in that a drying frame (4) is arranged on the outer wall of the sedimentation mechanism (1), and a scraping mechanism (5) is arranged in the inner cavity of the sedimentation mechanism (1), and the scraping mechanism (5) is used for sludge loosening and sludge scraping and accumulation; A sewage pumping mechanism (6) is arranged in the inner cavity of the sedimentation mechanism (1), and the sewage pumping mechanism (6) is used for pumping out the accumulated sludge; The sedimentation mechanism (1) includes a pool body (11), a cleaning pipe (12) and a water outlet pipe (13), the cleaning pipe (12) is fixedly inserted through the bottom of the pool body (11), and the water outlet pipe (13) is fixedly inserted through one side of the pool body (11); The scraping mechanism (5) includes a support rod (51), a servo motor (52), a positioning component (53), two scraping plates (54), a plurality of loosening components (55) and two snap rings (56), the support rod (51) is fixed to the top of the inner wall of the pool body (11), the servo motor (52) is fixedly arranged on the upper surface of the support rod (51), the positioning component (53) is arranged at the bottom of the servo motor (52), the two scraping plates (54) are respectively fixed on both sides of the positioning component (53), the bottoms and the opposite ends of the two scraping plates (54) are rotationally and scrapingly connected to the inner wall of the pool body (11), the two snap rings (56) are respectively fixed to the tops of the two scraping plates (54), and the plurality of loosening components (55) are respectively arranged at equal intervals on the opposite sides of the two scraping plates (54), and the bottom of the sewage pumping mechanism (6) is arranged on the opposite sides of the two scraping plates (54); The sewage pumping mechanism (6) includes a rotating groove (61), a plurality of rotating components (62), a support plate (63), a connecting pipe (64), two sludge pumping pipes (65), two sludge suction heads (66), a plurality of protection components (67), two lengthening frames (68) and a plurality of connecting components (69), the rotating groove (61) is opened at the top of the pool body (11), the plurality of rotating components (62) are arranged at equal intervals at the bottom of the support plate (63), the rotating components (62) are slidably connected to the inner cavity of the rotating groove (61), the support plate (63) is rotatably connected to the top of the pool body (11), the support plate (63) is fixedly connected to the bottom of the sewage pumping pump (2), the connecting pipe (64) is fixedly inserted through the inner cavity of the support plate (63), the two sludge pumping pipes (65) are respectively fixedly inserted and connected to both ends of the connecting pipe (64), the two sludge suction heads (66) are respectively fixed to the bottom ends of the sludge pumping pipes (65), the bottom of the sludge pumping pipe (65) is movably clamped in the inner cavity of the snap ring (56), the plurality of protection components (67) are arranged at equal intervals at the bottom of the sludge suction head (66), the lengthening frame (68) is fixed to the bottom end of the sludge suction head (66), and the plurality of connecting components (69) are arranged between the support plate (63) and the rotating column (531); The protection component (67) includes a movable groove (671), a movable frame (672), a fixed rod (673), a compression spring (674), a protection block (675) and a ball (676). A plurality of the movable grooves (671) are equidistantly formed at the bottom of the mud suction head (66). The fixed rod (673) is slidably connected to the inner cavity of the movable frame (672). The compression spring (674) is fixed between the bottom of the fixed rod (673) and the bottom of the movable frame (672). The ball (676) is embedded at the bottom of the protection block (675). The mud suction head (66) is arranged on one side of the scraper (54). The movable frame (672) is slidably inserted into the inner cavity of the movable groove (671). Both ends of the fixed rod (673) are fixedly connected to the inner wall of the movable groove (671). The protection block (675) is fixed to the bottom end of the movable frame (672). The ball (676) is in rolling connection with the bottom of the inner wall of the pool body (11).

2. The sedimentation tank for sewage treatment according to claim 1, characterized in that, The positioning component (53) includes a rotating column (531), a top rod (532) and a round head (533). The top of the rotating column (531) is rotatably inserted through the middle of the support rod (51) through a bearing. The rotating column (531) is in transmission connection with the output end of the servo motor (52). The top rod (532) is fixed to the bottom end of the rotating column (531). The round head (533) is arranged at the bottom end of the top rod (532). The two scrapers (54) are respectively fixed to both sides of the outer wall of the rotating column (531).

3. A sedimentation tank for sewage treatment according to claim 1, wherein, The loosening component (55) includes a push rod (551), an arc rod (552) and a plurality of loosening rods (553). A plurality of the push rods (551) are equidistantly inserted and fixed at the top of the two scrapers (54). The arc rod (552) is fixed to the bottom of the adjacent push rod (551). A plurality of the loosening rods (553) are equidistantly fixed to the bottom of the arc rod (552). The bottom of the arc rod (552) is in sliding fit connection with the bottom end of the inner wall of the pool body (11).

4. A sedimentation tank for sewage treatment according to claim 1, wherein, The connection component (69) includes a connecting rod (691), a T-shaped groove (692), a sliding rod (693) and a clamping rod (694). A plurality of the connecting rods (691) are equidistantly fixed to the lower surface of the inner side of the support plate (63). The T-shaped groove (692) is formed at the bottom of the connecting rod (691). One end of the sliding rod (693) is slidably inserted through one end of the clamping rod (694). One end of the sliding rod (693) has a T-shaped structure. The other end of the sliding rod (693) has a hook structure. One end of the clamping rod (694) is fixed to the outer wall of the rotating column (531). The other end of the sliding rod (693) is slidably inserted through the other end of the clamping rod (694).

5. The sedimentation tank for sewage treatment according to claim 1, wherein The rotating assembly (62) includes a rotating block (621), a limiting rod (622) and two rollers (623). The rotating block (621) is fixed to the lower surface of the support plate (63). The limiting rod (622) is fixedly inserted through the bottom of the rotating block (621). The two rollers (623) are respectively rotatably inserted through the two ends of the limiting rod (622) by bearings.

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