Urban sewage treatment plant

Abstract

The present invention discloses a municipal sewage treatment device, and relates to the technical field of municipal sewage treatment, including a degradation pool, wherein an injection pipe is arranged above the injection pipe, a rotating disk is fixedly connected to the bottom end of the injection pipe, an air jet is installed on the outer wall of the rotating disk, and an injection mechanism and a feeding mechanism are also included. The present invention sets an injection mechanism, and the operation of the motor drives the movable seat to slide on the outer wall of the cross bar, and the displacement of the movable seat drives the injection pipe to move; the displacement of the movable seat drives the spur gear to move along the outer wall of the toothed plate, thereby driving the spur gear to rotate, and the rotation of the spur gear drives the injection pipe to rotate; the oxygen in the air intake pipe moves into the cross bar, and when the air intake moves into the movable seat, the C-shaped block is displaced to cancel the shielding of the air intake, and the oxygen is ejected through the air jet, so that the injection pipe automatically rotates while reciprocating in the degradation pool, and the air jet sprays oxygen into the degradation pool, so that the oxygen in the degradation pool is evenly distributed.

Description

Technical Field

[0001] The present invention relates to the technical field of urban sewage treatment, in particular to an urban sewage treatment device. Background Art

[0002] Generally, the main pollutants in urban sewage are easily degradable organic matter, so most urban sewage treatment plants use aerobic biological treatment methods.

[0003] During biodegradation treatment, sewage is injected into a degradation tank, where microorganisms decompose the organic matter in the sewage. When the degradation tank is in use, oxygen needs to be injected into the degradation tank through an air injection pipe. Simultaneously, ammonia in the sewage undergoes an oxidation-reduction reaction to produce nitrates, requiring the addition of ferrous salts into the tank for a replacement reaction. However, in the prior art, the air injection pipe is fixed in position within the degradation tank, which can easily lead to uneven oxygen distribution within the tank, affecting the activity of the microorganisms. Simultaneously, the manual addition of ferrous salts is labor-intensive and inefficient. In order to achieve the goal of uniformly injecting oxygen and adding ferrous salts into the degradation tank, a municipal sewage treatment device is provided. Summary of the Invention

[0004] The purpose of the present invention is to provide a municipal sewage treatment device in order to achieve the purpose of uniformly injecting oxygen and adding ferrous salt into a degradation pool.

[0005] To achieve the above object, the present invention provides the following technical solution: a municipal sewage treatment device, comprising a degradation tank, an air injection pipe is provided above the degradation tank, the bottom end of the air injection pipe is fixedly connected to a rotating disk, an air jet is installed on the outer wall of the rotating disk, the air injection pipe injects oxygen into the degradation tank through an air injection mechanism, and ferrous salt is fed into the degradation tank through a feeding mechanism;

[0006] The gas injection mechanism includes a mounting plate, which is symmetrically fixedly connected to the top of the degradation tank. A cross bar is fixedly connected between the two mounting plates, and the cross bar is hollow. One end of the cross bar is fixedly connected to an air inlet pipe, and the outer wall of the cross bar is slidably connected to a movable seat. The gas injection pipe is rotatably connected to the movable seat, and the top of the movable seat is fixedly connected to a connecting plate. A motor is installed on the outer wall of the mounting plate, and the output end of the motor is connected to a first threaded rod, which passes through the connecting plate.

[0007] As a further solution of the present invention: the air injection mechanism also includes a toothed plate, which is fixedly connected to the outer wall of one side of the cross bar, and the interior of the movable seat is located at the outer wall of the toothed plate and is rotatably connected to a spur gear, the bottom end of the spur gear is fixedly connected to a connecting shaft, the outer wall of the connecting shaft is fixedly connected to a first synchronous wheel, the outer wall of the first synchronous wheel is connected to a synchronous belt, the inner wall of one end of the synchronous belt is connected to a second synchronous wheel, the second synchronous wheel is fixedly connected to the air injection pipe, an air inlet is provided at the bottom end of the cross bar, the interior of the cross bar is slidably connected to an extrusion block extending to the top of the cross bar, the interior of the cross bar is slidably connected to a C-shaped block extending to the top of the air inlet, and a first spring is connected between the C-shaped block and the cross bar.

[0008] As a further solution of the present invention: the feeding mechanism includes a material box, which is arranged at the bottom end of the movable seat, the top of the material box is provided with a feed port, the bottom end of the material box is provided with a discharge port, the bottom end of the movable seat is provided with a connecting groove, the inner wall of the connecting groove is provided with a fixing groove, the top end of the material box is fixedly connected to a connecting block, the interior of the connecting block is slidingly connected to a fixed block extending from the connecting block, a second spring is connected between the fixed block and the connecting block, the interior of the material box is slidingly connected to a push rod extending to the bottom end of the fixed block, the bottom end of the material box is rotatably connected to a rotating block, the top of the rotating block is fixedly connected to a second threaded rod, and the second threaded rod extends to the interior of the push rod.

[0009] As a further solution of the present invention: the feeding mechanism also includes a rotating cylinder, which is rotatably connected to the interior of the material box and located in the inner cavity of the discharge port, a groove is provided at the top of the rotating cylinder, one end of the rotating cylinder is fixedly connected to a first bevel gear, the interior of the material box is located on the outer wall of the first bevel gear and is rotatably connected to a second bevel gear, the top of the second bevel gear is fixedly connected to a rotating column, the top of the rotating column is provided with a docking groove, and the bottom end of the connecting shaft is fixedly connected to a docking block.

[0010] As a further solution of the present invention: a first threaded hole is formed on the outer wall of the connecting plate, and the first threaded hole matches the first threaded rod.

[0011] As a further solution of the present invention: the end of the extrusion block located outside the cross bar is triangular, the top of the C-shaped block is provided with a first inclined surface, and the bottom end of the extrusion block is in contact with the first inclined surface.

[0012] As a further solution of the present invention: the outer wall of the tooth plate is provided with tooth grooves, the tooth grooves are engaged with the spur gears, and the outer walls of the second synchronous wheel and the first synchronous wheel are provided with patterns matching the synchronous belt.

[0013] As a further solution of the present invention: the outer wall of the connecting block is in contact with the inner wall of the connecting groove, and the outer wall of one end of the fixing block is in contact with the inner wall of the fixing groove.

[0014] As a further solution of the present invention: the top end of the push rod is provided with a second inclined surface, the bottom end of the fixed block contacts the second inclined surface, and the bottom end of the push rod is provided with a second threaded hole, and the second threaded hole matches the second threaded rod.

[0015] As a further solution of the present invention, the first bevel gear is meshed with the second bevel gear, the inner wall of the docking groove is fitted with the outer wall of the docking block, and the outer wall of the docking block is square in shape.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting up a gas injection mechanism, the operation of the motor drives the movable seat to slide on the outer wall of the crossbar, and the movement of the movable seat drives the gas injection pipe to move; the movement of the movable seat drives the spur gear to move along the outer wall of the toothed plate, thereby driving the spur gear to rotate, and the rotation of the spur gear drives the gas injection pipe to rotate; the oxygen in the air intake pipe moves into the crossbar, and when the air inlet moves into the movable seat, the C-shaped block moves to remove the obstruction of the air inlet, and oxygen is ejected through the air jet, so that the gas injection pipe automatically rotates while moving back and forth in the degradation tank, and the air jet sprays oxygen into the degradation tank, so that the oxygen in the degradation tank is evenly distributed.

[0018] 2. By setting a feeding mechanism, when the material box is installed, the docking block is inserted into the docking groove, so that when the movable seat is displaced, the connecting shaft rotates to drive the docking block to rotate, the docking block rotates to drive the rotating column to rotate, the rotating column rotates to drive the second bevel gear to rotate, the second bevel gear rotates to drive the first bevel gear to rotate, and the first bevel gear rotates to drive the rotating cylinder to rotate. When the groove rotates to the top of the rotating cylinder, the material in the material box falls into the groove. When the groove rotates to the bottom of the rotating cylinder, the material in the groove falls into the degradation tank through the discharge port, so that as the movable seat moves, the ferrous salt is automatically and evenly fed into the degradation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 Schematic diagram of the installation of the crossbar of the present invention;

[0021] Figure 3 It is a schematic diagram of the internal structure of the movable seat of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the connecting shaft of the present invention;

[0023] Figure 5 Schematic diagram of the internal structure of the crossbar of the present invention;

[0024] Figure 6 This is a schematic diagram of the installation of the material box of the present invention;

[0025] Figure 7 Schematic diagram of the internal structure of the material box of the present invention;

[0026] Figure 8 It is a structural schematic diagram of the rotating drum of the present invention.

[0027] In the figure: 1, degradation tank; 2, gas injection pipe; 3, rotating disk; 4, air injection port; 5, gas injection mechanism; 501, mounting plate; 502, cross bar; 503, air inlet pipe; 504, movable seat; 505, connecting plate; 506, first threaded rod; 507, motor; 508, tooth plate; 509, spur gear; 510, connecting shaft; 511, first synchronous wheel; 512, synchronous belt; 513, second synchronous wheel; 514, air inlet; 515, extrusion block; 516, first elastic Spring; 517, C-shaped block; 6, feeding mechanism; 601, material box; 602, feeding port; 603, discharging port; 604, connecting groove; 605, fixing groove; 606, connecting block; 607, fixing block; 608, second spring; 609, push rod; 610, second threaded rod; 611, rotating block; 612, rotating cylinder; 613, groove; 614, first bevel gear; 615, second bevel gear; 616, rotating column; 617, docking groove; 618, docking block. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or connected in one piece; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0030] See also Figures 1 to 8 In an embodiment of the present invention, a municipal sewage treatment device includes a degradation tank 1, an air injection pipe 2 is provided above the degradation tank 1, the bottom end of the air injection pipe 2 is fixedly connected to a rotating disk 3, an air jet 4 is installed on the outer wall of the rotating disk 3, the air injection pipe 2 injects oxygen into the degradation tank 1 through an air injection mechanism 5, and ferrous salt is fed into the degradation tank 1 through a feeding mechanism 6.

[0031] The gas injection mechanism 5 includes a mounting plate 501, which is symmetrically fixedly connected to the top of the degradation tank 1. A cross bar 502 is fixedly connected between the two mounting plates 501. The cross bar 502 is hollow, and one end of the cross bar 502 is fixedly connected to an air inlet pipe 503. The outer wall of the cross bar 502 is slidably connected to a movable seat 504. The gas injection pipe 2 is rotatably connected to the movable seat 504. The top of the movable seat 504 is fixedly connected to a connecting plate 505. A motor 507 is installed on the outer wall of the mounting plate 501. The output end of the motor 507 is connected to a first threaded rod 506. The first threaded rod 506 runs through the connecting plate 505. The gas injection mechanism 5 also includes a tooth plate 508. The tooth plate 508 is fixedly connected to the outer wall of one side of the cross bar 502. The movable seat The interior of 504 is located on the outer wall of the tooth plate 508 and is rotatably connected to a spur gear 509. The bottom end of the spur gear 509 is fixedly connected to a connecting shaft 510. The outer wall of the connecting shaft 510 is fixedly connected to a first synchronous wheel 511. The outer wall of the first synchronous wheel 511 is connected to a synchronous belt 512. The inner wall of one end of the synchronous belt 512 is connected to a second synchronous wheel 513. The second synchronous wheel 513 is fixedly connected to the gas injection pipe 2. An air inlet 514 is provided at the bottom end of the cross bar 502. The interior of the cross bar 502 is slidably connected to an extrusion block 515 extending to the top of the cross bar 502. The interior of the cross bar 502 is slidably connected to a C-shaped block 517 extending to the top of the air inlet 514. A first spring 516 is connected between the C-shaped block 517 and the cross bar 502.

[0032] In this embodiment: the operation of the motor 507 drives the first threaded rod 506 to rotate, the rotation of the first threaded rod 506 drives the connecting plate 505 to displace, the displacement of the connecting plate 505 drives the movable seat 504 to slide along the outer wall of the cross bar 502, and the displacement of the movable seat 504 drives the gas injection pipe 2 to displace; the displacement of the movable seat 504 drives the spur gear 509 to displace along the outer wall of the tooth plate 508, thereby driving the spur gear 509 to rotate, the rotation of the spur gear 509 drives the connecting shaft 510 to rotate, the rotation of the connecting shaft 510 drives the first synchronous wheel 511 to rotate, the rotation of the first synchronous wheel 511 drives the synchronous belt 512 to rotate, the rotation of the synchronous belt 512 drives the second synchronous wheel 513 to rotate, the rotation of the second synchronous wheel 513 drives the gas injection pipe 2 to rotate, and the rotation of the gas injection pipe 2 drives the rotating disk 3 and the jet nozzle 4 to rotate.

[0033] The oxygen in the air intake pipe 503 is transported to the cross bar 502. At this time, the C-shaped block 517 blocks the air inlet 514. When the air inlet 514 moves into the movable seat 504, the extrusion block 515 contacts the movable seat 504 and is displaced by force. The displacement of the extrusion block 515 pushes the C-shaped block 517 to displace, causing extrusion on the first spring 516. The displacement of the C-shaped block 517 cancels the obstruction of the air inlet 514. The oxygen in the cross bar 502 enters the movable seat 504 through the air inlet 514, and then enters the air injection pipe 2 and the rotating disk 3, and then is ejected through the air jet 4, so that the air injection pipe 2 can automatically rotate while moving back and forth in the degradation tank 1. The air jet 4 sprays oxygen into the degradation tank 1, so that the oxygen in the degradation tank 1 is evenly distributed. It is worth noting that one end of the air intake pipe 503 is connected to the oxygen storage device.

[0034] Please refer to Figures 6 to 8 The feeding mechanism 6 includes a material box 601, which is arranged at the bottom end of the movable seat 504. A feeding port 602 is provided at the top of the material box 601, and a discharging port 603 is provided at the bottom end of the material box 601. A connecting groove 604 is provided at the bottom end of the movable seat 504, and a fixing groove 605 is provided on the inner wall of the connecting groove 604. A connecting block 606 is fixedly connected to the top of the material box 601, and a fixed block 607 extending from the connecting block 606 is slidably connected inside the connecting block 606. A second spring 608 is connected between the fixed block 607 and the connecting block 606. A push rod 609 extending to the bottom end of the fixed block 607 is slidably connected inside the material box 601, and the bottom end of the material box 601 is rotatably connected to the rotating block 6 11. The top of the rotating block 611 is fixedly connected to the second threaded rod 610, and the second threaded rod 610 extends to the inside of the push rod 609. The feeding mechanism 6 also includes a rotating cylinder 612, which is rotatably connected to the inside of the material box 601 and is located in the inner cavity of the discharge port 603. A groove 613 is provided at the top of the rotating cylinder 612. One end of the rotating cylinder 612 is fixedly connected to the first bevel gear 614. The interior of the material box 601 is located on the outer wall of the first bevel gear 614 and is rotatably connected to the second bevel gear 615. The top of the second bevel gear 615 is fixedly connected to the rotating column 616. The top of the rotating column 616 is provided with a docking groove 617. The bottom end of the connecting shaft 510 is fixedly connected to the docking block 618.

[0035] In this embodiment: ferrous salt is placed into the material box 601 through the feed port 602. When the material box 601 is installed, the connecting block 606 is inserted into the connecting groove 604. At this time, the fixed block 607 is engaged into the fixed groove 605 by the elastic force of the second spring 608, and the material box 601 is fixedly installed. When the material box 601 is removed, the rotating block 611 is rotated. The rotating block 611 rotates to drive the second threaded rod 610 to rotate. The second threaded rod 610 rotates to drive the push rod 609 to move. The push rod 609 moves to push the fixed block 607 to move. The fixed block 607 moves out of the fixed groove 605, and the material box 601 is fixed.

[0036] When the material box 601 is installed, the docking block 618 is inserted into the docking groove 617, so that when the movable seat 504 is displaced, the connecting shaft 510 rotates to drive the docking block 618 to rotate, the docking block 618 rotates to drive the rotating column 616 to rotate, the rotating column 616 rotates to drive the second bevel gear 615 to rotate, the second bevel gear 615 rotates to drive the first bevel gear 614 to rotate, the first bevel gear 614 rotates to drive the rotating cylinder 612 to rotate, when the groove 613 rotates to the top of the rotating cylinder 612, the material in the material box 601 falls into the groove 613, when the groove 613 rotates to the bottom of the rotating cylinder 612, the material in the groove 613 falls into the degradation tank 1 through the discharge port 603, so that as the movable seat 504 moves, the ferrous salt is automatically and evenly put into the degradation tank 1.

[0037] Please refer to Figures 1 to 2 A first threaded hole is formed on the outer wall of the connecting plate 505 , and the first threaded hole matches the first threaded rod 506 .

[0038] In this embodiment, the operation of the motor 507 drives the first threaded rod 506 to rotate, the rotation of the first threaded rod 506 drives the connecting plate 505 to move, and the displacement of the connecting plate 505 drives the movable seat 504 to slide on the outer wall of the crossbar 502.

[0039] Please refer to 5 in particular. The end of the extrusion block 515 located outside the crossbar 502 is triangular. The top of the C-shaped block 517 is provided with a first inclined surface, and the bottom end of the extrusion block 515 contacts the first inclined surface.

[0040] In this embodiment: when the air inlet 514 moves into the movable seat 504, the extrusion block 515 contacts the movable seat 504 and is displaced by force. The displacement of the extrusion block 515 pushes the C-shaped block 517 to displace, causing the first spring 516 to be squeezed. The displacement of the C-shaped block 517 cancels the obstruction of the air inlet 514, and the oxygen in the cross bar 502 enters the movable seat 504 through the air inlet 514.

[0041] Please refer to Figures 3 and 4The outer wall of the tooth plate 508 is provided with tooth grooves, which mesh with the spur gear 509 , and the outer walls of the second synchronous wheel 513 and the first synchronous wheel 511 are provided with patterns that match the synchronous belt 512 .

[0042] In this embodiment: the displacement of the movable seat 504 drives the spur gear 509 to move along the outer wall of the tooth plate 508, thereby driving the spur gear 509 to rotate, the rotation of the spur gear 509 drives the connecting shaft 510 to rotate, the rotation of the connecting shaft 510 drives the first synchronous wheel 511 to rotate, the rotation of the first synchronous wheel 511 drives the synchronous belt 512 to rotate, the rotation of the synchronous belt 512 drives the second synchronous wheel 513 to rotate, and the rotation of the second synchronous wheel 513 drives the gas injection pipe 2 to rotate.

[0043] Please refer to Figures 6 and 7 The outer wall of the connecting block 606 is in contact with the inner wall of the connecting groove 604 , and the outer wall of one end of the fixing block 607 is in contact with the inner wall of the fixing groove 605 .

[0044] In this embodiment, the connecting block 606 is inserted into the connecting groove 604 , and the fixing block 607 is engaged into the fixing groove 605 by the elastic force of the second spring 608 , thereby fixing the material box 601 .

[0045] Please refer to Figures 6 and 7 The top of the push rod 609 is provided with a second inclined surface, the bottom end of the fixing block 607 is in contact with the second inclined surface, and the bottom end of the push rod 609 is provided with a second threaded hole, which matches the second threaded rod 610.

[0046] In this embodiment: the rotating block 611 is rotated, the rotating block 611 drives the second threaded rod 610 to rotate, the second threaded rod 610 drives the push rod 609 to move, the push rod 609 moves and pushes the fixed block 607 to move, the fixed block 607 moves out of the fixed groove 605, and the fixation of the material box 601 is cancelled.

[0047] Please refer to Figures 6 to 8 The first bevel gear 614 is meshed with the second bevel gear 615 , and the inner wall of the docking groove 617 is fitted with the outer wall of the docking block 618 , and the outer wall of the docking block 618 is square in shape.

[0048] In this embodiment, the connecting shaft 510 rotates to drive the docking block 618 to rotate, the docking block 618 rotates to drive the rotating column 616 to rotate, the rotating column 616 rotates to drive the second bevel gear 615 to rotate, the second bevel gear 615 rotates to drive the first bevel gear 614 to rotate, and the first bevel gear 614 rotates to drive the rotating cylinder 612 to rotate.

[0049] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. An urban sewage treatment device, comprising a degradation tank (1), wherein an air injection pipe (2) is arranged above the degradation tank (1), a rotating disk (3) is fixedly connected to the bottom end of the air injection pipe (2), and an air jet (4) is installed on the outer wall of the rotating disk (3), characterized in that: The gas injection pipe (2) injects oxygen into the degradation tank (1) through a gas injection mechanism (5), and ferrous salt is fed into the degradation tank (1) through a feeding mechanism (6); The gas injection mechanism (5) comprises a mounting plate (501), the mounting plate (501) is symmetrically fixedly connected to the top of the degradation tank (1), a cross bar (502) is fixedly connected between the two mounting plates (501), the cross bar (502) is hollow, one end of the cross bar (502) is fixedly connected to an air inlet pipe (503), the outer wall of the cross bar (502) is slidably connected to a movable seat (504), the gas injection pipe (2) is rotatably connected to the movable seat (504), the top of the movable seat (504) is fixedly connected to a connecting plate (505), the outer wall of the mounting plate (501) is mounted with a motor (507), the output end of the motor (507) is connected to a first threaded rod (506), and the first threaded rod (506) passes through the connecting plate (505); The feeding mechanism (6) comprises a material box (601), the material box (601) is arranged at the bottom end of the movable seat (504), a material inlet (602) is provided at the top end of the material box (601), a material outlet (603) is provided at the bottom end of the material box (601), a connecting groove (604) is provided at the bottom end of the movable seat (504), a fixing groove (605) is provided on the inner wall of the connecting groove (604), a connecting block (606) is fixedly connected to the top end of the material box (601), and the inner wall of the connecting block (606) is provided with a sliding groove (605). A fixed block (607) extending from the connecting block (606) is connected, a second spring (608) is connected between the fixed block (607) and the connecting block (606), a push rod (609) extending to the bottom end of the fixed block (607) is slidably connected inside the material box (601), a rotating block (611) is rotatably connected at the bottom end of the material box (601), a second threaded rod (610) is fixedly connected to the top end of the rotating block (611), and the second threaded rod (610) extends to the inside of the push rod (609); The feeding mechanism (6) further comprises a rotating cylinder (612), the rotating cylinder (612) being rotatably connected to the interior of the material box (601) and located in the inner cavity of the material outlet (603), and a groove (613) is provided at the top end of the rotating cylinder (612).

2. The urban sewage treatment device according to claim 1, characterized in that: The gas injection mechanism (5) further comprises a toothed plate (508), wherein the toothed plate (508) is fixedly connected to an outer wall of one side of the crossbar (502), and an inner portion of the movable seat (504) is rotatably connected to an outer wall of the toothed plate (508), a spur gear (509) is fixedly connected to a connecting shaft (510) at the bottom end of the spur gear (509), a first synchronous wheel (511) is fixedly connected to an outer wall of the connecting shaft (510), a synchronous belt (512) is connected to an outer wall of the first synchronous wheel (511), and a synchronous belt (512) is connected to the outer wall of the synchronous belt (512). A second synchronous wheel (513) is connected to the inner wall of one end, and the second synchronous wheel (513) is fixedly connected to the gas injection pipe (2). An air inlet (514) is provided at the bottom end of the cross bar (502). An extrusion block (515) extending to the top of the cross bar (502) is slidably connected inside the cross bar (502). A C-shaped block (517) extending to the top of the air inlet (514) is slidably connected inside the cross bar (502), and a first spring (516) is connected between the C-shaped block (517) and the cross bar (502).

3. The urban sewage treatment device according to claim 2, characterized in that: One end of the rotating cylinder (612) is fixedly connected to a first bevel gear (614); the interior of the material box (601) is rotatably connected to an outer wall of the first bevel gear (614); the top end of the second bevel gear (615) is fixedly connected to a rotating column (616); a docking groove (617) is provided at the top end of the rotating column (616); and a docking block (618) is fixedly connected to the bottom end of the connecting shaft (510).

4. The urban sewage treatment device according to claim 2, characterized in that: The outer wall of the connecting plate (505) is provided with a first threaded hole, and the first threaded hole matches the first threaded rod (506).

5. The urban sewage treatment device according to claim 2, characterized in that: One end of the extrusion block (515) located outside the crossbar (502) is triangular in shape, a first inclined surface is provided at the top end of the C-shaped block (517), and a bottom end of the extrusion block (515) is in contact with the first inclined surface.

6. The urban sewage treatment device according to claim 2, characterized in that: The outer wall of the tooth plate (508) is provided with tooth grooves, the tooth grooves meshing with the spur gear (509), and the outer walls of the second synchronous wheel (513) and the first synchronous wheel (511) are provided with patterns matching the synchronous belt (512).

7. The urban sewage treatment device according to claim 1, characterized in that: The outer wall of the connecting block (606) fits with the inner wall of the connecting groove (604), and the outer wall of one end of the fixing block (607) fits with the inner wall of the fixing groove (605).

8. The urban sewage treatment device according to claim 1, characterized in that: The top end of the push rod (609) is provided with a second inclined surface, the bottom end of the fixing block (607) is in contact with the second inclined surface, and the bottom end of the push rod (609) is provided with a second threaded hole, which matches the second threaded rod (610).

9. The urban sewage treatment device according to claim 3, characterized in that: The first bevel gear (614) is meshed with the second bevel gear (615), the inner wall of the docking groove (617) is in contact with the outer wall of the docking block (618), and the outer wall of the docking block (618) is square in shape.

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