Anti-caking self-crushing sewage treatment high-viscosity dosing cam rotor pump

Abstract

The present application relates to the technical field of rotor pump, in particular to a self-crushing anti-caking high-viscosity dosing cam rotor pump for sewage treatment. A mounting base is provided with a driving motor fixedly installed at the upper end, an output end of the driving motor is connected with a rotating shaft, the rotating shaft is connected with internal gears of a gear box, a driving rod is arranged at the left end of the gear box, a rotor pump is connected with the left side of the gear box, flow-through openings are symmetrically arranged at the front and rear ends of the rotor pump, a rotor cam is arranged inside the rotor pump, and the rotor cam is connected with the driving rod in a nested manner. A crushing pressure relief mechanism is arranged on the rotor cam, and is used for improving the impurity crushing efficiency and reducing material jamming. A rotating cleaning mechanism is arranged on the rotor cam, and is used for reducing impurity residues on the inner wall of the rotor pump. The mechanism improves the rapid crushing of impurities and the rapid flow of liquid, and reduces adhesion.

Description

Technical Field

[0001] This invention relates to the field of rotor pump technology, specifically to a high-viscosity chemical dosing cam rotor pump for wastewater treatment that prevents caking and has self-breaking properties. Background Technology

[0002] In wastewater treatment processes, high-viscosity agents such as flocculants and coagulants need to be continuously added. These agents are highly susceptible to moisture absorption, agglomeration, and crystallization during storage and transportation. Furthermore, the agent medium often contains fine impurities and fiber particles, making conventional pumps unsuitable for such complex conditions. Currently, the industry commonly uses lobe rotor pumps for high-viscosity chemical dosing and transportation. While these pumps offer advantages such as volumetric conveying, strong self-priming capability, and stable flow rate, making them suitable for high-viscosity media transportation scenarios, they still have several technical shortcomings in practical use.

[0003] Existing traditional lobe rotor pumps typically feature a smooth, rounded rotor edge, providing media transport but lacking self-crushing and pressure relief mechanisms. When transporting agglomerated chemicals or media containing impurities, they are ill-suited for shearing and crushing agglomerated and crystalline particles. Large agglomerated media easily become stuck in the rotor meshing gap and pump body flow channels, easily causing pump jamming and blockage. In severe cases, this can lead to equipment shutdown, motor overload and burnout, significantly impacting the continuity of wastewater treatment dosing processes. Furthermore, the meshing operation of traditional rotor pumps creates a closed, oil-trapped zone. High-viscosity media are compressed under instantaneous high pressure, which easily forces small agglomerated particles and impurities into the rotor meshing gap, exacerbating rotor wear, pump vibration, and noise. Over long-term operation, this significantly reduces equipment sealing and transport accuracy. In addition, high-viscosity chemicals in existing lobe rotor pumps easily adhere to and remain on the pump body wall. Prolonged standing of these residues can lead to secondary crystallization and solidification, not only narrowing the pump's flow channels and reducing transport efficiency but also fostering bacterial growth and media contamination, affecting the accuracy of wastewater treatment chemical dosing and treatment effectiveness. Conventional equipment relies solely on the natural flushing of the medium, which is inconvenient for cleaning the pump body. It requires frequent manual disassembly and cleaning, resulting in a large workload and high cost for operation and maintenance. Furthermore, frequent shutdowns for maintenance can seriously affect the stable operation of the sewage treatment system.

[0004] To address the aforementioned issues, innovative designs are urgently needed based on existing approaches. Summary of the Invention

[0005] The purpose of this invention is to provide a self-breaking, anti-caking, high-viscosity chemical dosing cam rotor pump for wastewater treatment, in order to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-viscosity dosing cam rotor pump for sewage treatment with anti-caking and self-breaking properties, comprising a mounting base, a drive motor fixedly mounted on the upper end of the mounting base, a rotating shaft connected to the output end of the drive motor, the rotating shaft connected to a gear inside a gearbox, a drive rod provided at the left end of the gearbox, a rotor pump connected to the left side of the gearbox, flow ports symmetrically provided at the front and rear ends of the rotor pump, a rotor cam provided inside the rotor pump, and the rotor cam nested and connected to the drive rod;

[0007] A crushing and pressure relief mechanism is provided, which is mounted on a rotor cam and is used to improve the efficiency of impurity crushing and reduce material jamming.

[0008] A rotating cleaning mechanism is provided on the rotor cam and is used to reduce impurities remaining on the inner wall of the rotor pump.

[0009] Preferably, the crushing and pressure relief mechanism includes a pressure relief groove, which is formed on the protruding outer edge of the rotor cam. The arc-shaped groove surface of the rotor cam is provided with a snap-fit ​​block, and the snap-fit ​​block is provided with intermittent crushing teeth.

[0010] Preferably, the pressure relief groove and the snap-fit ​​block are set at equal angles with the rotor cam as the center, and the rotor cam is set to mesh vertically with respect to the horizontal centerline of the rotor pump;

[0011] The width of the pressure relief groove is greater than the width of the snap-fit ​​block, and the pressure relief groove and the snap-fit ​​block are positioned in a one-to-one correspondence.

[0012] Preferably, the crushing and pressure relief mechanism further includes a flow divider rib, which is elastically and movably installed at the connection between the rotor pump and the flow port;

[0013] The flow dividers are evenly spaced in the rotor pump, and a connecting plate is fixedly installed at the upper end of each flow divider. The connecting plate is slidably installed in the inner wall of the rotor pump.

[0014] Preferably, the rotor pump has an internal limiting sliding installation of a squeezing block, the outer end of the squeezing block is an arc surface, and the squeezing block is fixedly installed with locking teeth at equal intervals at one end inside the rotor pump.

[0015] The arc surface of the extrusion block is located on the rotation trajectory of the rotor cam, and the extrusion block is symmetrically arranged about the vertical center line of the rotor pump.

[0016] Preferably, the snap-fit ​​teeth are triangular in shape, and are disposed at the intervals between adjacent diversion edges, with the inclined surface of the snap-fit ​​teeth abutting against the lower end of the connecting plate.

[0017] Preferably, the rotating cleaning mechanism includes a flow guide scraper, which is disposed on the end face of the rotor cam and fits against the inner wall of the rotor pump.

[0018] Preferably, the guide scraper is elastically limited and slidably mounted on the rotor cam, and a fixing block is installed at equal angles on the inner side of the guide scraper, with a pressure spring connected to the fixing block.

[0019] Preferably, the other end of the pressure spring is connected to a movable block, which is fixedly and slidably installed inside the rotor cam.

[0020] Preferably, the rotating cleaning mechanism further includes a counterweight block, which is movably mounted at equal angles inside the rotor cam. The counterweight block is trapezoidal when viewed from the front, and the inclined surface of the counterweight block abuts against the movable block.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. By creating pressure relief grooves on the outer edge of the rotor cam that correspond one-to-one with the crushing teeth, when the rotor meshes and generates trapped oil high pressure, the pressure relief grooves can quickly connect the high-pressure trapped oil area with the low-pressure feed side, releasing the instantaneous high pressure in real time. This prevents the high-pressure medium from squeezing fine particles into the rotor's mating gap, effectively reducing rotor wear and jamming. Simultaneously, the pressure relief grooves can store high-viscosity agents, forming a continuous liquid film lubrication during rotor rotation, reducing rotor dry friction loss, weakening equipment pressure pulsation and vibration noise, and significantly extending equipment service life. A flexible, movable diversion ridge is set at the connection between the rotor pump and the flow port, which can uniformly divert the high-viscosity medium and crushed fine particles entering the pump body, preventing the medium from concentrating and impacting the rotor, reducing local pressure unevenness and medium turbulence. At the same time, the diversion ridge works in conjunction with the connecting plate and the extrusion block, causing the diversion ridge to continuously move up and down, increasing the disturbance force on the passing medium and improving conveying efficiency.

[0023] 2. The rotating cleaning mechanism of this invention enables dynamic cleaning of the pump's inner wall. When the rotor cam rotates, the internal counterweight is compressed by centrifugal force against the movable block and pressure spring, driving the guide scraper to elastically conform to the inner wall of the pump and rotate to scrape away high-viscosity chemicals and residual impurities adhering to the pump wall in real time. No manual disassembly and cleaning is required, completely avoiding the problems of media residue solidification and secondary scaling, continuously maintaining unobstructed flow in the pump body, stabilizing equipment delivery performance, and significantly reducing equipment maintenance frequency and costs. This invention integrates crushing, pressure relief, diversion, and self-cleaning functions into the rotor pump's body structure, eliminating the need for additional auxiliary equipment. The overall structure is compact and easy to install. The various mechanisms work in tandem and coordination, perfectly adapting to the high-viscosity, easily agglomerated, and impurity-containing dosing conditions in wastewater treatment, effectively solving the shortcomings of traditional equipment such as single function, frequent failures, and cumbersome maintenance. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall connection structure of the present invention;

[0026] Figure 3 This is a schematic cross-sectional view of the positive rotor pump of the present invention;

[0027] Figure 4 This is a schematic diagram of the side rotor pump structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the connecting plate and snap-fit ​​teeth structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection structure between the rotor cam and the guide scraper of the present invention;

[0030] Figure 7 This is a schematic diagram of the internal cross-sectional structure of the rotor cam of the present invention;

[0031] Figure 8 This is a schematic diagram of the connection structure between the movable block and the counterweight block of the present invention.

[0032] In the diagram: 1. Mounting base; 2. Drive motor; 3. Rotating shaft; 4. Gearbox; 6. Rotary pump; 5. Drive rod; 7. Flow port; 8. Rotor cam; 9. Pressure relief groove; 10. Snap-fit ​​block; 11. Diverter ridge; 12. Connecting plate; 13. Extrusion block; 14. Snap-fit ​​teeth; 15. Guide scraper ridge; 16. Fixing block; 17. Pressure spring; 18. Movable block; 19. Counterweight block. Detailed Implementation

[0033] Please see Figures 1-8 The present invention provides a technical solution: a high-viscosity dosing cam rotor pump for sewage treatment with anti-caking and self-breaking properties, comprising a mounting base 1, a drive motor 2 fixedly mounted on the upper end of the mounting base 1, a rotating shaft 3 connected to the output end of the drive motor 2, the rotating shaft 3 being connected to the gear inside the gearbox 4, a drive rod 5 provided on the left end of the gearbox 4, a rotor pump 6 connected to the left side of the gearbox 4, flow ports 7 symmetrically provided at the front and rear ends of the rotor pump 6, a rotor cam 8 provided inside the rotor pump 6, and the rotor cam 8 being nested and connected to the drive rod 5;

[0034] The crushing and pressure relief mechanism is mounted on the rotor cam 8. The crushing and pressure relief mechanism is used to improve the crushing efficiency of impurities and reduce material jamming.

[0035] A rotating cleaning mechanism is installed on the rotor cam 8. The rotating cleaning mechanism is used to reduce impurities remaining on the inner wall of the rotor pump 6.

[0036] As one embodiment of the present invention, the crushing and pressure relief mechanism includes a pressure relief groove 9, which is formed on the protruding outer edge of the rotor cam 8. A snap-fit ​​block 10 is provided on the arc-shaped groove surface of the rotor cam 8, and intermittent crushing teeth are provided on the snap-fit ​​block 10.

[0037] In one embodiment of the present invention, the pressure relief groove 9 and the snap-fit ​​block 10 are set at equal angles with the rotor cam 8 as the center, and the rotor cam 8 is set to mesh vertically with the horizontal center line of the rotor pump 6.

[0038] The width of the pressure relief groove 9 is greater than the width of the snap-fit ​​block 10, and the positions of the pressure relief groove 9 and the snap-fit ​​block 10 correspond one-to-one.

[0039] As one embodiment of the present invention, the crushing and pressure relief mechanism further includes a flow divider 11, which is elastically and movably installed at the connection between the rotor pump 6 and the flow port 7.

[0040] Diverting ribs 11 are evenly spaced in the rotor pump 6. A connecting plate 12 is fixedly installed at the upper end of the diverting ribs 11. The connecting plate 12 is slidably installed in the inner wall of the rotor pump 6.

[0041] As one embodiment of the present invention, a squeezing block 13 is slidably installed inside the rotor pump 6. The outer end of the squeezing block 13 is an arc surface. A snap-fit ​​tooth 14 is fixedly installed at equal distances on one end of the squeezing block 13 inside the rotor pump 6.

[0042] The arc surface of the extrusion block 13 is located on the rotation trajectory of the rotor cam 8, and the extrusion block 13 is symmetrically arranged about the vertical center line of the rotor pump 6.

[0043] In one embodiment of the present invention, the snap-fit ​​tooth 14 is triangular in shape and is disposed at the interval between adjacent diversion edges 11. The inclined surface of the snap-fit ​​tooth 14 abuts against the lower end of the connecting plate 12.

[0044] This mechanism mainly consists of a pressure relief groove 9 on the outer edge of the rotor cam 8, a snap-fit ​​block 10 with intermittent breaking teeth, a flow divider 11 at the flow port 7, a connecting plate 12, a pressing block 13, and snap-fit ​​teeth 14. In actual implementation, the pressure relief groove 9 and the snap-fit ​​block 10 are arranged alternately at equal angles with the rotor cam 8 as the center, and the width of the pressure relief groove 9 is greater than the width of the snap-fit ​​block 10 to ensure sufficient pressure relief and flow space.

[0045] During rotor meshing and rotation, the crushing teeth of the clamping block 10 can shear and crush the high-viscosity agent clumps and hard crystals entering the groove, achieving pre-crushing of clumps. At the same time, the pressure relief groove 9 connects the high-pressure trapped oil zone of the pump chamber with the low-pressure feed side in real time, quickly releasing instantaneous high pressure and avoiding particles from embedding in the meshing gap and causing jamming and wear. When the medium flows through the flow port 7, the equidistantly arranged elastic diversion ridges 11 can evenly divert and stabilize the flow, which, together with the squeezing block 13 and the abutment linkage between the triangular clamping teeth 14 and the connecting plate 12, improves the transportation efficiency.

[0046] As one embodiment of the present invention, the rotating cleaning mechanism includes a flow guide scraper 15, which is disposed on the end face of the rotor cam 8 and is in contact with the inner wall of the rotor pump 6.

[0047] In one embodiment of the present invention, the flow guide scraper 15 is elastically limited and slidably mounted on the rotor cam 8, and a fixing block 16 is installed at equal angles on the inner side of the flow guide scraper 15, and a pressure spring 17 is connected to the fixing block 16.

[0048] In one embodiment of the present invention, the other end of the pressure spring 17 is connected to a movable block 18, which is fixedly and slidably installed inside the rotor cam 8.

[0049] As one embodiment of the present invention, the rotating cleaning mechanism also includes a counterweight 19, which is movably installed inside the rotor cam 8 at equal angles. The counterweight 19 is trapezoidal when viewed from the front, and the inclined surface of the counterweight 19 abuts against the movable block 18.

[0050] This mechanism relies on the centrifugal elastic linkage structure built into the rotor cam 8 to achieve fully automatic wall scraping and cleaning. It mainly includes a flow guide scraper 15, a fixed block 16, a pressure spring 17, a movable block 18, and a trapezoidal counterweight block 19. In specific implementation, the flow guide scraper 15 is elastically slidably assembled on the end face of the rotor cam 8, and can rotate in close contact with the inner wall of the rotor pump 6.

[0051] When the equipment is running at high speed, the counterweight 19 slides radially outward under centrifugal force, and the movable block 18 is squeezed by the inclined surface, the pressure spring 17 is stretched and the flow guide scraper 15 is pushed by the fixed block 16, so that it elastically presses against the inner wall of the pump body, continuously scraping off the adhering high viscosity medium and fine impurities, and preventing residual scaling.

[0052] When the equipment is running at low speed, stopped, or unloaded, the centrifugal force dissipates, the counterweight 19 resets, the pressure spring 17 rebounds, reducing the clamping force of the guide scraper 15 and avoiding wear and deformation caused by long-term rigid contact.

[0053] Working Principle: The equipment is securely assembled and fixed on the mounting base 1, providing a stable support foundation for the operation of the entire machine. During operation, the drive motor 2 outputs rotational power as the power source, which is transmitted to the gear set inside the gearbox 4 via the rotating shaft 3 at the output end. The gearbox 4 completes the speed adjustment and direction switching, thereby driving the drive rod 5 at the left end to rotate stably. The rotor pump 6 is fixedly mounted on the left side of the gearbox 4. Its two sets of rotor cams 8 are nested and connected to the drive rod 5, and rotate synchronously in opposite directions with the drive rod 5. High-viscosity sewage treatment dosing medium enters the pump chamber through the symmetrically arranged flow ports 7 at the front and rear of the rotor pump 6. The continuous and stable delivery of the medium is achieved by relying on the periodic change of the pump chamber volume during the meshing of the rotor cams 8.

[0054] The arc-shaped groove surface of the rotor cam 8 corresponds to the fixed mounting of the snap-fit ​​block 10 at equal angles. The snap-fit ​​block 10 has intermittent crushing teeth integrally set on its outer side. Among them, the pressure relief groove 9 corresponds to the snap-fit ​​block 10 and is arranged alternately, and the width of the pressure relief groove 9 is greater than the width of the snap-fit ​​block 10 to ensure sufficient pressure relief flow space. During the high-speed meshing rotation of the rotor cam 8, the snap-fit ​​block 10 also engages synchronously with the pressure relief groove 9. Therefore, the intermittent crushing teeth on the snap-fit ​​block 10 can shear, crush, and tear the high-viscosity flocculant clumps, crystalline hard particles, and media mixed impurities entering the pressure relief groove 9, breaking large agglomerated agent clumps into fine particles. This effectively avoids large impurities getting stuck in the rotor meshing gap and pump cavity flow channel, greatly reducing the probability of equipment stalling and jamming failures, and improving the overall efficiency of impurity crushing.

[0055] In traditional cam rotor meshing operations, a sealed oil-trapping zone is formed between the tooth tip and the inner wall of the pump chamber. The medium is rapidly compressed, generating instantaneous high pressure, which can easily cause rotor wear and medium jamming. This equipment, through the pressure relief groove 9 arranged on the outer edge of the rotor, can connect the sealed high-pressure zone with the low-pressure feed side at the moment the trapped oil high pressure is formed, quickly relieving the peak pressure inside the pump chamber, eliminating the high-pressure impact of trapped oil, and preventing the high-pressure medium from carrying fine particles and embedding them into the rotor fitting gap. Meanwhile, the pressure relief groove 9 can retain a portion of high-viscosity medium in real time. During the continuous rotation of the rotor, the retained medium continuously fills the rotor meshing gap, forming a stable liquid film lubrication layer, effectively reducing rotor friction loss, weakening equipment vibration and noise, and improving equipment operation stability. During the rotation of the rotor cam 8, it continuously applies pressure to the extrusion block 13, thereby causing the extrusion block 13 to drive the snap-fit ​​teeth 14 to reciprocate. At the same time, the snap-fit ​​teeth 14 continuously abut against the connecting plate 12, enabling the connecting plate 12 to drive the guide scraper 15 to move up and down, increasing the disturbance rate of the liquid and improving the fluid conveying efficiency.

[0056] During normal high-speed operation, the rotor cam 8 rotates, generating centrifugal force that drives the internal trapezoidal counterweight 19 to slide radially outward along the rotor. The inclined surface of the counterweight 19 continuously presses against the movable block 18, pushing the movable block 18 to move outward. During the displacement of the movable block 18, the pressure spring 17 is stretched, and the pushing force is transmitted to the guide scraper 15 through the fixed block 16, ensuring that the guide scraper 15 always maintains an elastic state that presses against the inner wall of the pump body. During continuous rotation, the guide scraper 15 evenly scrapes the inner wall of the rotor pump 6, removing adhering high-viscosity agents, broken residual fine particles, and impurities in real time, completely avoiding secondary crystallization and solidification scale problems caused by long-term adhesion and stagnation of the medium, and preventing the reduction of the pump cavity flow cross-section and the decrease in conveying efficiency.

[0057] When the equipment starts at low speed, stops, or runs under no-load, the rotor speed decreases, the centrifugal force is greatly reduced, and the counterweight 19 automatically resets after losing centrifugal thrust, thus eliminating the squeezing force on the movable block 18. At this time, the pressure spring 17 rebounds and contracts, reducing the pressure applied to the guide scraper 15 and releasing the high-strength compression state with the pump body wall. This effectively prevents the guide scraper 15 from being deformed and excessively worn under long-term pressure when the equipment is stationary or at low speed, greatly extending the service life of the cleaning structure. The entire process requires no manual intervention, achieving automation.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A self-breaking, anti-caking, high-viscosity chemical dosing cam rotor pump for wastewater treatment, comprising a mounting base (1), characterized in that: A drive motor (2) is fixedly installed on the upper end of the mounting base (1). The output end of the drive motor (2) is connected to a rotating shaft (3). The rotating shaft (3) is connected to the gear inside the gearbox (4). A drive rod (5) is provided on the left end of the gearbox (4). A rotor pump (6) is connected to the left side of the gearbox (4). Flow ports (7) are symmetrically provided at the front and rear ends of the rotor pump (6). A rotor cam (8) is provided inside the rotor pump (6). The rotor cam (8) is nested and connected to the drive rod (5). The crushing and pressure relief mechanism is mounted on the rotor cam (8) and is used to improve the crushing efficiency of impurities and reduce material jamming. A rotating cleaning mechanism is provided on the rotor cam (8) to reduce impurities remaining on the inner wall of the rotor pump (6).

2. The anti-caking, self-breaking high-viscosity chemical dosing cam rotor pump for sewage treatment according to claim 1, characterized in that: The crushing and pressure relief mechanism includes a pressure relief groove (9), which is opened on the protruding outer edge of the rotor cam (8). The arc-shaped groove surface of the rotor cam (8) is provided with a snap-fit ​​block (10), and the snap-fit ​​block (10) is provided with intermittent crushing teeth.

3. The anti-caking, self-breaking high-viscosity chemical dosing cam rotor pump for sewage treatment according to claim 2, characterized in that: The pressure relief groove (9) and the snap-fit ​​block (10) are set at equal angles with the rotor cam (8) as the center. The rotor cam (8) is set to mesh up and down with the horizontal center line of the rotor pump (6). The width of the pressure relief groove (9) is greater than the width of the snap-fit ​​block (10), and the positions of the pressure relief groove (9) and the snap-fit ​​block (10) correspond one-to-one.

4. The anti-caking, self-breaking high-viscosity chemical dosing cam rotor pump for sewage treatment according to claim 3, characterized in that: The crushing and pressure relief mechanism also includes a flow divider (11), which is elastically limited and movable at the connection between the rotor pump (6) and the flow port (7); The flow divider ribs (11) are evenly spaced in the rotor pump (6), and a connecting plate (12) is fixedly installed at the upper end of the flow divider ribs (11). The connecting plate (12) is slidably installed in the inner wall of the rotor pump (6).

5. The anti-caking, self-breaking high-viscosity chemical dosing cam rotor pump for sewage treatment according to claim 4, characterized in that: The rotor pump (6) is internally limited and slidably installed with a squeezing block (13). The outer end of the squeezing block (13) is an arc surface. The squeezing block (13) is located inside the rotor pump (6) and is fixedly installed with locking teeth (14) at equal distances. The arc surface of the extrusion block (13) is located on the rotation trajectory of the rotor cam (8), and the extrusion block (13) is symmetrically arranged about the vertical center line of the rotor pump (6).

6. The anti-caking, self-breaking high-viscosity chemical dosing cam rotor pump for sewage treatment according to claim 5, characterized in that: The snap-fit ​​tooth (14) is triangular in shape and is located at the interval between adjacent diversion edges (11). The inclined surface of the snap-fit ​​tooth (14) abuts against the lower end of the connecting plate (12).

7. The anti-caking, self-breaking high-viscosity chemical dosing cam rotor pump for sewage treatment according to claim 1, characterized in that: The rotating cleaning mechanism includes a flow guide scraper (15), which is disposed on the end face of the rotor cam (8) and is in contact with the inner wall of the rotor pump (6).

8. The anti-caking, self-breaking high-viscosity chemical dosing cam rotor pump for sewage treatment according to claim 7, characterized in that: The flow guide scraper (15) is elastically limited and slidably mounted on the rotor cam (8). A fixing block (16) is installed at equal angles on the inner side of the flow guide scraper (15). A pressure spring (17) is connected to the fixing block (16).

9. A self-breaking, anti-caking, high-viscosity chemical dosing cam rotor pump for wastewater treatment according to claim 8, characterized in that: The other end of the pressure spring (17) is connected to a movable block (18), which is fixedly and slidably installed inside the rotor cam (8).

10. A self-breaking, anti-caking, high-viscosity chemical dosing cam rotor pump for wastewater treatment according to claim 9, characterized in that: The rotating cleaning mechanism also includes a counterweight (19), which is movably installed inside the rotor cam (8) at equal angles. The counterweight (19) is trapezoidal when viewed from the front, and the inclined surface of the counterweight (19) abuts against the movable block (18).

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