Municipal sewage treatment system

Abstract

The present invention discloses a municipal sewage treatment system, which belongs to the field of municipal sewage. The municipal sewage treatment system includes a combined inclined transmission structure, an elastic grille structure and an angled transmission structure. A chain group is provided in the internal engagement of the combined inclined transmission structure, and one end of the outer wall of the chain group is connected to the elastic grille structure. A double transmission structure is provided on one side of the outer wall of the combined inclined transmission structure, and one end of the outer wall of the double transmission structure is connected to the angled transmission structure. A solid-liquid separation unit is provided below the angled transmission structure. The first connecting block and the second connecting block of the present invention can be slidably adjusted inside the staggered connecting block, respectively. The movable space inside the staggered connecting block is used to relatively expand the first connecting block and the second connecting block to change the size of the gap formed by the assembly in the elastic grille structure, so that the engaged impurities and debris can fall off due to the enlargement of the gap, thereby reducing the blockage of the elastic grille structure.

Description

Technical Field

[0001] The present invention relates to the field of municipal sewage treatment, and more particularly to a municipal sewage treatment system. Background Art

[0002] Municipal sewage refers to domestic sewage, industrial sewage and other sewage collected through the sewer system. Municipal sewage needs to be treated with sewage treatment technology to remove suspended solid pollutants, organic pollutants, toxic substances, polluting organisms, polluting nutrients and other pollutants in the sewage, and can only be discharged after meeting the standards. Commonly used sewage treatment methods include physical treatment, biological treatment, sludge disposal generated by sewage treatment and chemical treatment.

[0003] The current municipal sewage treatment system includes a primary filtration treatment procedure, which is usually carried out through a coarse-sized screen interception and separation device for preliminary filtration treatment, sand settling and sedimentation. The secondary filtration treatment procedure is carried out through an aeration tank and a secondary sedimentation tank. The tertiary process treatment procedure uses chemical additives to remove both difficult-to-degrade organic matter and soluble inorganic matter such as nitrogen and phosphorus that can cause eutrophication of the water body. Among them, the screen interception and separation device is a special water treatment equipment that can continuously and automatically intercept and remove various shapes of debris in the fluid. At the same time, it uses a screen mesh belt to separate debris and impurities, and cooperates with the transmission unit to drive and move the screen mesh belt, driving the attached debris and impurities to be transported to achieve continuous separation.

[0004] As shown in the application number: CN202010589005.8, the present invention relates to the technical field of sewage removers and discloses a grille sewage remover, wherein a first motor is fixedly installed on the upper surface of the sewage discharge frame, and rake teeth are rotatably installed inside the sewage discharge frame, a fixing plate is welded on the front surface of the sewage discharge frame, and a second motor is installed on the upper surface of the fixing plate, an adjusting component is fixedly connected to the center position of one side of the sewage discharge frame, and a cleaning component is fixedly installed on the side of the front surface of the sewage discharge frame close to the fixing plate. By setting the adjusting component, the angle of the sewage discharge frame can be adjusted so that it can adapt to different angles to remove sewage, and the operation is simple and the adjustment is convenient, and the setting of the support rod can effectively play a supporting effect. By setting the cleaning component, it can be avoided that impurities on the surface of the rake teeth cannot fall off sufficiently, affecting its cleaning effect on sewage, and the cleaning sleeve is adhered by the adhesive layer for easy disassembly.

[0005] replace

[0006] Although the device has many beneficial effects, the following problems still exist: the screen dirt separation device in the municipal sewage treatment system transports the attached debris and impurities through the screen mesh belt, and then uses a physical rotating cleaning brush to clean the outer wall of the screen mesh belt. However, sewage now contains a lot of debris and impurities. Granular, linear and other sewage debris and impurities can be cleaned by a rotating cleaning brush, but based on water flushing and continuous processing requirements, hard debris and impurities that are the same or slightly larger than the gap size of the screen mesh belt are easily stuck with the screen mesh belt during the cleaning process, and such debris and impurities are stuck in the gap of the screen mesh belt, causing the screen mesh belt to become blocked. The stuck hard debris and impurities cannot be effectively cleaned by a physical rotating cleaning brush. In view of this, we propose a municipal sewage treatment system. Summary of the invention

[0007] 1. Technical issues to be solved

[0008] The object of the present invention is to provide a municipal sewage treatment system to solve the problems raised in the above background technology.

[0009] 2. Technical solution

[0010] A municipal sewage treatment system comprises a combined inclined transmission structure, an elastic grille structure and an angled transmission structure, wherein a chain group is arranged in a snap-fitting manner inside the combined inclined transmission structure, and one end of the outer wall of the chain group is connected to the elastic grille structure, a double transmission structure is arranged on one side of the outer wall of the combined inclined transmission structure, and one end of the outer wall of the double transmission structure is connected to the angled transmission structure, a solid-liquid separation unit is arranged below the angled transmission structure, the elastic grille structure comprises a staggered connection block, and a rake tooth is fixed on one side of the outer wall of the staggered connection block, an I-shaped rotating block is arranged in a snap-fitting manner at both ends of the interior of the staggered connection block, and a middle-end connecting block is fixed on the middle end of the interior of the I-shaped rotating block, a first connecting block is arranged on one side of the exterior of the middle-end connecting block, and a first coiled spring is fixed on one side of the outer wall of the middle-end connecting block and the middle end of one side of the outer wall of the first connecting block, a second connecting block is arranged on the other side of the exterior of the middle-end connecting block, and a second coiled spring is fixed on one side of the outer wall of the second connecting block and the middle end of the other side of the outer wall of the middle-end connecting block.

[0011] Preferably, the staggered connection block is movably connected to the first connection block and the second connection block, and the first connection block and the second connection block are symmetrically distributed along both sides of the middle end of the middle end connection block.

[0012] Preferably, the first connecting block and the second connecting block respectively form an elastic structure with the middle connecting block through the first coil spring, the second coil spring and the middle connecting block, and the first coil spring and the second coil spring are in a conical coil shape.

[0013] Preferably, the combined inclined transmission structure includes a connecting frame, and an inclined transmission gear is arranged on one side of the inner upper end of the connecting frame, a micro-inclined transmission gear is arranged on the inner middle end of the connecting frame, and a bending auxiliary gear is arranged on the inner upper side of the middle end of the connecting frame, and a tail end gear is arranged on a layer of the inner lower end of the connecting frame.

[0014] Preferably, the tilt transmission gear is movably connected to the connecting frame via a bearing, and two tilt transmission gears are provided and distributed in a figure eight shape.

[0015] Preferably, the dual transmission structure includes a supporting frame, and a transmission motor is arranged at the inner lower end of the supporting frame, an auxiliary rotating positioning frame is fixedly provided on the top outer wall of the supporting frame, and a transmission belt turntable is connected to one side of the outer wall of the auxiliary rotating positioning frame, and the lower end of the outer belt of the transmission belt turntable is sleeved and connected to the auxiliary transmission belt turntable.

[0016] Preferably, the angle transmission structure comprises a first transmission shaft, and one end of the outer wall of the first transmission shaft is connected to a universal joint, and one end of the outer wall of the universal joint is connected to a second transmission shaft.

[0017] Preferably, the universal joint is fixedly connected to the second transmission shaft and the first transmission shaft, and the combined tilt transmission structure is composed of a transmission structure through the universal joint, the second transmission shaft, the first transmission shaft and the double transmission structure.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] 1. The first connecting block and the second connecting block of the present invention are in an I-shape during connection and installation. The first connecting block and the second connecting block can be slidably adjusted left and right inside the staggered connecting block. The movable space inside the staggered connecting block is used to relatively expand the first connecting block and the second connecting block to change the size of the gap formed by the assembly in the elastic grid structure, so that the impurities and debris can fall off due to the enlargement of the gap, thereby reducing the blockage of the elastic grid structure.

[0021] 2. The first connecting block and the second connecting block of the present invention are connected to the middle connecting block through the first coiled spring and the second coiled spring respectively to form elastic force, so that the gaps of the elastic grille structure of the first connecting block and the second connecting block are in the size required for normal filtration when there is no external force. In addition, the first coiled spring and the second coiled spring are coiled in a conical shape so that the space volume required for the first connecting block and the second connecting block to be placed can be reduced as much as possible within a limited space, thereby meeting the basic working requirements of manufacturing and assembling the elastic grille structure to achieve the required filtration.

[0022] 3. The inclined transmission gears of the present invention are respectively arranged on one side of the inner upper end of the connecting frame, and are installed at a certain inclination angle. The two inclined transmission gears are installed and distributed in an eight-shaped shape, so that the chain group generates pulling force on both sides during the upward transmission process of the meshing transmission to unfold the elastic grating structure connected to the chain group. The two inclined transmission gears are used to meet the mechanical kinetic energy required for the expansion of the elastic grating structure, and at the same time form a cyclic expansion effect. There is no need for manual or suitable mechanical equipment to control the expansion of the elastic grating structure, and the overall structure is simple and easy to install and build.

[0023] 4. In the present invention, the second transmission shaft and the first transmission shaft are respectively connected to the inclined transmission gear and the transmission belt turntable. The double transmission structure drives the transmission belt turntable to rotate so that the inclined first transmission shaft rotates, and cooperates with the universal joint to drive the second transmission shaft and the inclined transmission gear to rotate, so that the second transmission shaft and the first transmission shaft with an inclined angle can be synchronously connected to perform rotational transmission work, without the need for power transmission through two sets of power devices, thereby reducing the cost required for installation and construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the chain assembly installation structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the combined tilt transmission structure of the present invention;

[0027] Figure 4 For the present invention Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0028] Figure 5 It is a three-dimensional structural schematic diagram of the dual transmission structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the working structure of the elastic grid structure of the present invention;

[0030] Figure 7 It is a schematic diagram of the cross-sectional structure of the elastic grid structure of the present invention;

[0031] Figure 8 It is a schematic diagram of the installation structure of the first coil spring and the second coil spring of the present invention;

[0032] Fig. 9 It is a schematic diagram of the internal side structure of the elastic grid structure of the present invention.

[0033] Explanation of the numbers in the figure: 1. Combined inclined transmission structure; 101. Connecting frame; 102. Inclined transmission gear; 103. Micro-inclined transmission gear; 104. Bending auxiliary gear; 105. Tail end gear; 2. Chain group; 3. Elastic grid structure; 301. Staggered connecting block; 302. Rake teeth; 303. I-shaped rotating block; 304. Middle end connecting block; 305. First connecting block; 306. First coil spring; 307. Second connecting block; 308. Second coil spring; 4. Double transmission structure; 401. Support frame; 402. Transmission motor; 403. Auxiliary rotating positioning frame; 404. Transmission belt turntable; 405. Auxiliary transmission belt turntable; 5. Angle transmission structure; 501. First transmission shaft; 502. Universal joint; 503. Second transmission shaft; 6. Solid-liquid separation unit. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present invention, “plurality” means two or more than two, unless otherwise clearly and specifically defined.

[0036] See also Figure 1-9 , the present invention provides a municipal sewage treatment system.

[0037] The municipal sewage treatment system includes a combined inclined transmission structure 1, a chain group 2, an elastic grid structure 3, a dual transmission structure 4, an angled transmission structure 5 and a solid-liquid separation unit 6; the chain group 2 is engaged with the interior of the combined inclined transmission structure 1, and one end of the outer wall of the chain group 2 is connected to the elastic grid structure 3; one side of the outer wall of the combined inclined transmission structure 1 is connected to the dual transmission structure 4, and one end of the outer wall of the dual transmission structure 4 is connected to the angled transmission structure 5; the bottom of the angled transmission structure 5 is connected to the solid-liquid separation unit 6.

[0038] Among them, the elastic grid structure 3 includes a staggered connecting block 301, a rake tooth 302 is fixed on one side of the outer wall of the staggered connecting block 301, an I-shaped rotating block 303 is clamped at both ends of the inside of the staggered connecting block 301, and a middle-end connecting block 304 is fixed at the middle end of the inside of the I-shaped rotating block 303, a first connecting block 305 is arranged on the outer side of the middle-end connecting block 304, and a first coiled spring 306 is fixed on one side of the outer wall of the middle-end connecting block 304 and the middle end of one side of the outer wall of the first connecting block 305, a second connecting block 307 is arranged on the other side of the outside of the middle-end connecting block 304, and a second coiled spring 308 is fixed on one side of the outer wall of the second connecting block 307 and the middle end of the other side of the outer wall of the middle-end connecting block 304.

[0039] The staggered connection block 301 is movably connected to the first connection block 305 and the second connection block 307, and the first connection block 305 and the second connection block 307 are symmetrically distributed along the two sides of the middle end of the middle connection block 304; the first connection block 305 and the second connection block 307 of the present invention are in an I-shape during the connection installation, and the first connection block 305 and the second connection block 307 can be slidably adjusted left and right inside the staggered connection block 301 respectively; the movable space inside the staggered connection block 301 is used to make the first connection block 305 and the second connection block 307 expand relatively, so as to change the size of the gap formed by the assembly in the elastic grid structure 3, so that the impurities and debris can fall off due to the enlargement of the gap, so as to reduce the blockage of the elastic grid structure 3.

[0040] The first connecting block 305 and the second connecting block 307 respectively form an elastic structure with the middle connecting block 304 through the first coiled spring 306 and the second coiled spring 308, and the first coiled spring 306 and the second coiled spring 308 are in a conical coiled shape; the first connecting block 305 and the second connecting block 307 of the present invention are respectively connected with the middle connecting block 304 through the first coiled spring 306 and the second coiled spring 308 to form an elastic force, so that the gap of the elastic grille structure 3 of the first connecting block 305 and the second connecting block 307 is in the size required for normal filtration when there is no external force, and the first coiled spring 306 and the second coiled spring 308 are coiled in a conical shape so that the first connecting block 305 and the second connecting block 307 can reduce the required space volume as much as possible within a limited space, so as to meet the basic working requirements of manufacturing and assembling the elastic grille structure 3 to achieve the required filtration.

[0041] The combined tilting transmission structure 1 includes a connecting frame 101, and an tilting transmission gear 102 is arranged on one side of the internal upper end of the connecting frame 101, a micro-tilt transmission gear 103 is arranged on the internal middle end of the connecting frame 101, and a bending auxiliary gear 104 is arranged on the internal upper side of the middle end of the connecting frame 101, and a tail gear 105 is arranged on a layer of the internal lower end of the connecting frame 101.

[0042] The inclined transmission gear 102 is movably connected to the connecting frame 101 through a bearing, and two inclined transmission gears 102 are arranged in an eight-shaped distribution; the inclined transmission gears 102 of the present invention are respectively arranged on one side of the inner upper end of the connecting frame 101, and after installation, a certain inclination angle is formed, and the two inclined transmission gears 102 are installed and distributed in an eight-shaped distribution, so that the chain group 2 generates a pulling force to both sides during the upward transmission process of the meshing transmission, so as to unfold the elastic grid structure 3 connected to the chain group 2; the two inclined transmission gears 102 are used to meet the mechanical kinetic energy required for the expansion of the elastic grid structure 3, and at the same time form a cyclic expansion effect, without the need for manual or adaptive mechanical equipment operation to control the expansion of the elastic grid structure 3, and its overall structure is simple and easy to install and build.

[0043] The dual transmission structure 4 includes a supporting frame 401, and a transmission motor 402 is arranged at the inner lower end of the supporting frame 401, an auxiliary rotating positioning frame 403 is fixedly provided on the top outer wall of the supporting frame 401, and a transmission belt turntable 404 is connected to one side of the outer wall of the auxiliary rotating positioning frame 403, and the lower end of the outer belt of the transmission belt turntable 404 is sleeved and connected to the auxiliary transmission belt turntable 405.

[0044] The angled transmission structure 5 includes a first transmission shaft 501, and one end of the outer wall of the first transmission shaft 501 is connected to a universal joint 502, and one end of the outer wall of the universal joint 502 is connected to a second transmission shaft 503. At the same time, the universal joint 502 is fixedly connected with the second transmission shaft 503 and the first transmission shaft 501, and the combined tilting transmission structure 1 forms a transmission structure through the universal joint 502, the second transmission shaft 503, the first transmission shaft 501 and the double transmission structure 4; the second transmission shaft 503 and the first transmission shaft 501 of the present invention are respectively connected to the tilting transmission gear 102 and the transmission belt turntable 404; the double transmission structure 4 drives the transmission belt turntable 404 to rotate so that the tilted first transmission shaft 501 rotates, and cooperates with the universal joint 502 to drive the second transmission shaft 503 and the tilting transmission gear 102 to rotate, so that the second transmission shaft 503 and the first transmission shaft 501 with an inclined angle can be synchronously connected to perform rotation transmission work, without the need for power transmission through two sets of power devices, thereby reducing the cost required for installation and construction.

[0045] The matching transmission motor model is YE2-132S-4. In addition, the circuits, electronic components and modules involved in the present invention are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to the internal structure and methods.

[0046] Working principle: First, the screen dirt separation device in the municipal sewage treatment system is built and installed at the downstream or output end of the municipal sewage treatment pool, and then the transmission motor 402 is turned on to drive the transmission belt turntable 404 to rotate with the belt; the first transmission shaft 501 connected obliquely is rotated by the transmission belt turntable 404, and the universal joint 502 is used to drive the second transmission shaft 503 and the oblique transmission gear 102 to rotate, so that the second transmission shaft 503 and the first transmission shaft 501 with an inclined angle can be synchronously connected to perform rotation transmission; at the same time, the auxiliary transmission belt turntable 405 is driven to rotate, and the internal auger of the solid-liquid separation unit 6 is driven to rotate, without the need for power transmission through two or more power devices, so as to reduce the cost required for installation and construction;

[0047] Then, the first transmission shaft 501 and the second transmission shaft 503 respectively drive the two inclined transmission gears 102 to rotate, and the elastic grille structure 3 is transmitted through the chain group 2 connected to the outer wall in conjunction with the combined inclined transmission structure 1 to transport the impurities and debris attached by the flushing upward; the chain group 2 and the elastic grille structure 3 are partially transported to the bending auxiliary gear 104; at this time, the front end of the chain group 2 is meshed with the inclined transmission gear 102, and the inclined transmission gears 102 are respectively arranged on one side of the inner upper end of the connecting frame 101, and after installation, a certain inclination angle is formed, and the two inclined transmission gears 102 are installed and distributed in an eight-shaped shape, so that the chain group 2 generates a pulling force on both sides during the upward transmission process of the meshing transmission, so as to unfold the elastic grille structure 3 connected to the chain group 2; the two inclined transmission gears 102 are used to meet the mechanical kinetic energy required for the expansion of the elastic grille structure 3, and at the same time form a cyclic expansion effect, without the need for manual or adaptive mechanical equipment operation to control the expansion of the elastic grille structure 3;

[0048] At the same time, based on the inclined transmission gear 102, the chain group 2 and the elastic grid structure 3 are driven to unfold, and the first connecting block 305 and the second connecting block 307 are in an I-shape during the connection installation. The first connecting block 305 and the second connecting block 307 can be slid and adjusted left and right inside the staggered connecting block 301 respectively. The movable space inside the staggered connecting block 301 makes the first connecting block 305 and the second connecting block 307 expand relatively to change the size of the gap formed by the assembly in the elastic grid structure 3, so that the impurities and debris can fall off due to the enlargement of the gap, thereby reducing the blockage of the elastic grid structure 3, and facilitating cleaning by external cleaning structures such as cleaning brushes;

[0049] Finally, after the chain group 2, the elastic grille structure 3, etc. have passed through the slightly inclined transmission gear 103, the first connecting block 305 and the second connecting block 307 are respectively connected to the middle connecting block 304 through the first coiled spring 306 and the second coiled spring 308 to form an elastic force, so that the first connecting block 305 and the second connecting block 307 have the gaps in the elastic grille structure 3 in the size required for normal filtration without the action of external force, and perform normal filtration and interception work. In addition, by using the first coiled spring 306 and the second coiled spring 308 coiled in a conical shape, the first connecting block 305 and the second connecting block 307 can reduce the required placement space volume as much as possible within a limited space, meet the basic working requirements of the elastic grille structure 3 to manufacture and assemble to achieve the required filtration, and at the same time, the transported impurities and debris are fixedly separated by the solid-liquid separation unit 6 to reduce moisture for easy collection and cleaning.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Municipal sewage treatment system, characterized by: The invention comprises a combined inclined transmission structure (1), an elastic grille structure (3) and an angled transmission structure (5); a chain group (2) is arranged in engagement with the interior of the combined inclined transmission structure (1), and one end of the outer wall of the chain group (2) is connected to the elastic grille structure (3); a double transmission structure (4) is arranged on one side of the outer wall of the combined inclined transmission structure (1), and one end of the outer wall of the double transmission structure (4) is connected to the angled transmission structure (5); a solid-liquid separation unit (6) is arranged below the angled transmission structure (5); the elastic grille structure (3) comprises an interlaced connection block (301), and rake teeth (302) are fixed on one side of the outer wall of the interlaced connection block (301); An I-shaped rotating block (303) is provided at both ends of the staggered connecting block (301), and a middle connecting block (304) is fixed to the middle end of the I-shaped rotating block (303); a first connecting block (305) is provided on one side of the outside of the middle connecting block (304), and a first coiled spring (306) is fixed to one side of the outer wall of the middle connecting block (304) and the middle end of one side of the outer wall of the first connecting block (305); a second connecting block (307) is provided on the other side of the outside of the middle connecting block (304), and a second coiled spring (308) is fixed to one side of the outer wall of the second connecting block (307) and the middle end of the other side of the outer wall of the middle connecting block (304); The combined tilt transmission structure (1) comprises a connecting frame (101), and a tilt transmission gear (102) is arranged on one side of the inner upper end of the connecting frame (101); the tilt transmission gear (102) is movably connected to the connecting frame (101) via a bearing, and two tilt transmission gears (102) are arranged in an eight-shaped distribution.

2. The municipal sewage treatment system according to claim 1, characterized in that: The staggered connection block (301) is movably connected to the first connection block (305) and the second connection block (307), and the first connection block (305) and the second connection block (307) are symmetrically distributed along both sides of the middle end of the middle end connection block (304).

3. The municipal sewage treatment system according to claim 1, characterized in that: The first connecting block (305) and the second connecting block (307) respectively form an elastic structure with the middle connecting block (304) through the first coiled spring (306) and the second coiled spring (308), and the first coiled spring (306) and the second coiled spring (308) are in a conical coiled shape.

4. The municipal sewage treatment system according to claim 1, characterized in that: A slightly inclined transmission gear (103) is provided at the middle end of the connecting frame (101), a bending auxiliary gear (104) is provided at the upper side of the middle end of the connecting frame (101), and a tail gear (105) is provided at the lower end of the connecting frame (101).

5. The municipal sewage treatment system according to claim 1, characterized in that: The dual transmission structure (4) comprises a support frame (401), and a transmission motor (402) is arranged at the lower end of the support frame (401); an auxiliary rotating positioning frame (403) is fixedly arranged on the top outer wall of the support frame (401); a transmission belt turntable (404) is connected to one side of the outer wall of the auxiliary rotating positioning frame (403); and the lower end of the outer belt of the transmission belt turntable (404) is sleeved and connected to the auxiliary transmission belt turntable (405).

6. The municipal sewage treatment system according to claim 1, characterized in that: The angled transmission structure (5) comprises a first transmission shaft (501), one end of the outer wall of the first transmission shaft (501) is connected to a universal joint (502), and one end of the outer wall of the universal joint (502) is connected to a second transmission shaft (503).

7. The municipal sewage treatment system according to claim 6, characterized in that: The universal joint (502) is fixedly connected to the second transmission shaft (503) and the first transmission shaft (501), and the combined tilt transmission structure (1) forms a transmission structure through the universal joint (502), the second transmission shaft (503), the first transmission shaft (501) and the dual transmission structure (4).

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