Sewage purification treatment mechanism for sewage pump

Abstract

The invention relates to the technical field of sewage pumps, in particular to a sewage purification treatment mechanism for a sewage pump, which comprises a filtering double-layer sleeve mounted at the input end of the sewage pump, a filtering chamber and a circulating chamber are arranged in the filtering double-layer sleeve, a liquid inlet is formed in one side of the filtering chamber, and a slag return opening is formed in one end, far away from the liquid inlet, of the filtering chamber. A water outlet communicated with the sewage pump is formed in one end of the circulation cavity, a rotary driving shaft is rotationally installed at the axis position of the filtering double-layer sleeve, a driving impeller is installed on the rotary driving shaft and arranged at the position of the water outlet, and a rotary scraping shaft is installed on the rotary driving shaft and arranged at the axis position of the filtering cavity; a cleaning sleeve is installed at a slag returning opening of the filtering double-layer sleeve, a sewage collecting box is installed at the bottom of the cleaning sleeve, and a switching linear driver is further installed on the cleaning sleeve. The equipment maintenance cost and the fault rate can be effectively reduced, and meanwhile the equipment operation stability and the working efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage pumps, and in particular to a sewage purification treatment mechanism for a sewage pump. Background Art

[0002] Chinese patent CN210945149U discloses a coal-containing wastewater treatment device, which relates to the field of wastewater treatment technology. The coal-containing wastewater treatment device includes a water collection tank, and a sewage pump, a sewage purifier, a sewage tank, a clean water tank and a backwash pump are installed on one side of the water collection tank from left to right. The water inlet end of the sewage pump is connected to the water collection tank through a connecting pipe, and the water outlet end of the sewage pump is connected to the sewage purifier through a water supply pipe. The clean water outlet of the sewage purifier is connected to the clean water tank through a first water outlet pipe, and the sewage outlet of the sewage purifier is connected to the sewage tank through a second water outlet pipe. In the utility model, through the paddle and the connecting rod and under the action of the motor, the paddle can stir the liquid medicine in the medicine box evenly to improve the efficiency of the liquid medicine in purifying wastewater. At the same time, the limit frame will also rotate synchronously with the paddle, so that the rubber strip will scrape the inner wall of the medicine box to improve the convenience of cleaning the medicine box.

[0003] The above-mentioned technical solution intercepts large particles of impurities through filter plates, reducing the burden on subsequent treatment equipment. However, existing filtration devices often only use a single layer of filter plates for initial filtration. While this effectively removes larger impurities, it is unable to effectively intercept small suspended solids and fine coal slag present in the wastewater. These small impurities can enter the sewage pump with the wastewater and, over long-term operation, cause wear on key components such as the impeller and seals within the pump body. This not only reduces the pump's efficiency and service life, but also increases maintenance costs and failure rates.

[0004] Furthermore, when wastewater containing small impurities enters the sewage purifier directly, the impurities tend to accumulate inside the purifier, affecting the permeability and purification efficiency of the filter media, and even causing purifier blockage, increasing backwash frequency and energy consumption. Although existing technologies use backwashing devices to clean pipelines, they fail to fundamentally solve the problem of wear and blockage caused by small impurities in sewage pumps and purifiers. Summary of the Invention

[0005] In order to solve the above problems, a sewage purification treatment mechanism for a sewage pump is provided, which can effectively reduce the equipment maintenance cost and failure rate through the pretreatment mechanism, while improving the stability and working efficiency of the equipment operation.

[0006] In order to solve the problems of the prior art, the present invention provides a sewage purification mechanism for a sewage pump, comprising a pretreatment mechanism installed at the input end of the sewage pump, the pretreatment mechanism comprising a double-layer filtering sleeve installed at the input end of the sewage pump, a filtering chamber and a circulation chamber being provided inside the double-layer filtering sleeve, the inner wall of the filtering chamber being connected to the circulation chamber, a liquid inlet being provided on one side of the filtering chamber, a slag discharge port being provided at one end of the filtering chamber away from the liquid inlet, a water outlet being provided at one end of the circulation chamber being connected to the sewage pump, a rotating drive shaft being rotatably installed at the axial position of the double-layer filtering sleeve, a driving impeller being installed on the rotating drive shaft, the driving impeller being arranged at the water outlet position, a rotating scraper shaft being installed on the rotating drive shaft, the rotating scraper shaft being limitedly slidably connected with the rotating drive shaft, the rotating scraper shaft being arranged at the axial position of the filtering chamber, a cleaning sleeve being installed at the slag discharge port of the double-layer filtering sleeve, a sewage collecting box being installed at the bottom of the cleaning sleeve, a switching linear drive being further installed on the cleaning sleeve, and a telescopic end of the switching linear drive being connected to the rotating scraper shaft.

[0007] Preferably, the interior of the double-layer filtering sleeve is divided into a filtering chamber and a flow chamber by a filtering sleeve, the filtering sleeve is detachably connected to the double-layer filtering sleeve, and a switching filtering mechanism is also installed at the liquid inlet of the double-layer filtering sleeve.

[0008] Preferably, the switching filter mechanism includes a rotating mounting frame rotatably mounted on the liquid inlet of the double-layer filter sleeve, the rotating mounting frame is provided with a sewage filter layer, and the switching filter mechanism also includes a rotary driver for driving the rotating mounting frame to rotate.

[0009] Preferably, a limit mounting hole is provided at the axis center position of the rotating scraper shaft, and the limit mounting hole is mounted on the outside of the rotating drive shaft. A spiral blade is provided on the outside of the rotating scraper shaft, and a rubber scraper strip is provided on the edge of the spiral blade. Sealing blocks are installed at both ends of the rotating scraper shaft.

[0010] Preferably, a feed port is provided at one end of the cleaning sleeve, a strip-shaped discharge port is provided on the side wall of the cleaning sleeve, a mounting bracket is fixedly installed on the outer side of the cleaning sleeve, a plurality of water spray pipes are installed on the inner wall of the cleaning sleeve, a plurality of water outlet holes are provided on the water spray pipes, a gap sealing device is installed on the feed port of the cleaning sleeve, and a closing device is installed on the strip-shaped discharge port of the cleaning sleeve.

[0011] Preferably, the gap sealing device includes a sealing air ring installed at the feed port of the cleaning sleeve, and the gap sealing device also includes an extrusion sleeve installed on the mounting bracket, a pushing air bag is installed inside the extrusion sleeve, and the pushing air bag is connected to the sealing air ring through an air pipe. A pushing linear drive is also installed on the extrusion sleeve, and the telescopic end of the pushing linear drive extends toward the interior of the extrusion sleeve.

[0012] Preferably, the closing device includes a closing strip installed on the strip-shaped discharge port, the closing strip is slidably connected to the mounting bracket, and a spring is installed between the closing strip and the mounting bracket. The closing device also includes a bidirectional ball screw slide installed on the mounting bracket, and two pushing rings are installed on the movable end of the bidirectional ball screw slide. The pushing ring sleeve is slidably connected to the cleaning sleeve, and a pushing angle is provided on the pushing ring sleeve.

[0013] Preferably, the sewage collection box includes a limiting slide rail slidably connected to the mounting bracket, and the sewage collection box is provided with a detachable filter layer plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a double-layer filtering sleeve to perform deep pretreatment on the sewage before it enters the sewage pump. The sewage flows into the filter chamber from the liquid inlet. Under the suction of the pump body, the sewage penetrates into the flow chamber from the inner wall of the filter chamber, while small particles of suspended matter and fine coal slag and other impurities are trapped in the filter chamber, effectively preventing these impurities from entering the sewage pump with the wastewater. This process fundamentally reduces the wear of key components such as the impeller and seals inside the sewage pump by impurities, extends the service life of the sewage pump, reduces equipment maintenance costs and failure rates, and at the same time, reduces the amount of wastewater containing small particles of impurities entering the sewage purifier, avoids the accumulation of impurities inside the purifier, ensures the permeability and purification effect of the filter medium, reduces the risk of clogging of the purifier, reduces the backwashing frequency and energy consumption, and improves the stability and economy of the entire sewage purification system.

[0015] 2. The present invention has the function of automatically cleaning dirt. It monitors the water flow in real time through the water flow detector. When the water flow is detected to be reduced, indicating that there are too many particulate dirt inside the filter chamber, the cleaning sleeve releases the sealing limit on the rotating scraper shaft, switches the linear drive to drive the rotating scraper shaft from the slag exit into the cleaning sleeve, and simultaneously moves the dirt accumulated in the filter chamber into the cleaning sleeve, so that the filter chamber can quickly restore the circulation efficiency. The cleaning sleeve then cleans the rotating scraper shaft, and the dirt and impurities generated by cleaning fall into the sewage collection box for subsequent treatment. During the entire cleaning process, the double-layer filtering sleeve can still perform sewage circulation operations normally, realizing non-stop operation. This automatic cleaning mechanism ensures that the pretreatment mechanism can continuously and stably perform its filtering function, improves the stability and work efficiency of the equipment operation, and reduces production interruptions and efficiency losses caused by shutdown for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of a sewage purification treatment mechanism for a sewage pump of the present invention.

[0017] Figure 2 It is a front view of a sewage purification treatment mechanism for a sewage pump of the present invention.

[0018] Figure 3 yes Figure 2 Plane sectional view at section AA.

[0019] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0020] Figure 5 It is a three-dimensional schematic diagram of a pre-treatment mechanism in a sewage purification mechanism for a sewage pump of the present invention.

[0021] Figure 6 It is a three-dimensional schematic diagram of a rotating scraper shaft in a sewage purification treatment mechanism for a sewage pump of the present invention.

[0022] Figure 7 This is a three-dimensional diagram of the cleaning sleeve and the switching linear drive in the sewage purification treatment mechanism of a sewage pump of the present invention. Figure 1 .

[0023] Figure 8 This is a three-dimensional diagram of the cleaning sleeve and the switching linear drive in the sewage purification treatment mechanism of a sewage pump of the present invention. Figure 2 .

[0024] Figure 9 It is a front view of a cleaning sleeve and a switching linear drive in a sewage purification treatment mechanism for a sewage pump of the present invention.

[0025] Figure 10 yes Figure 9 Plane sectional view at CC section.

[0026] The numbers in the figure are: 1. Sewage pump; 2. Double-layer filter casing; 21. Liquid inlet; 22. Water outlet; 23. Slag outlet; 24. Filter sleeve; 25. Switchable filter mechanism; 251. Rotating mounting frame; 252. Sewage filter layer; 253. Rotating driver; 3. Rotating drive shaft; 31. Driving impeller; 4. Rotating scraper shaft; 41. Limiting mounting hole; 42. Blocking block; 43. Spiral blade; 431. Rubber scraper; 5. Cleaning sleeve; 51. Feed inlet; 52. Strip discharge Mouth; 53. Mounting bracket; 54. Gap sealing device; 541. Sealing air ring; 542. Extrusion sleeve; 543. Pushing linear actuator; 544. Pushing airbag; 545. Air pipe; 55. Closing device; 551. Closing strip; 552. Spring; 553. Bidirectional ball screw slide; 554. Pushing collar; 555. Pushing bevel; 56. Water spray pipe; 6. Switching linear actuator; 7. Sewage collection tank; 71. Limiting slide rail; 72. Filter layer plate. DETAILED DESCRIPTION

[0027] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] See also Figures 1 to 10 As shown, a sewage purification treatment mechanism for a sewage pump 1 includes a pretreatment mechanism installed at the input end of the sewage pump 1, the pretreatment mechanism includes a filtering double-layer casing 2 installed at the input end of the sewage pump 1, a filtering chamber and a flow chamber are provided inside the filtering double-layer casing 2, the inner wall of the filtering chamber is connected to the flow chamber, a liquid inlet 21 is provided on one side of the filtering chamber, a slag outlet 23 is provided at one end of the filtering chamber away from the liquid inlet 21, and a water outlet 22 connected to the sewage pump 1 is provided at one end of the flow chamber, and the axial position of the filtering double-layer casing 2 is rotatably installed. A rotating drive shaft 3 is provided with a driving impeller 31, which is arranged at the water outlet 22 position. A rotating scraper shaft 4 is provided on the rotating drive shaft 3, and the rotating scraper shaft 4 is slidingly connected with the rotating drive shaft 3. The rotating scraper shaft 4 is arranged at the axial position of the filter chamber. A cleaning sleeve 5 is provided at the slag discharge port 23 of the double-layer filtering sleeve 2, and a sewage collecting box 7 is provided at the bottom of the cleaning sleeve 5. A switching linear drive 6 is also provided on the cleaning sleeve 5, and the telescopic end of the switching linear drive 6 is connected to the rotating scraper shaft 4.

[0029] When sewage pump 1 is activated, the suction force generated forces sewage into the pump 1 through the pretreatment mechanism and is then transported to a designated area. During the suction process, sewage flows from the inlet 21 of the double-layer filter casing 2 into the filter chamber. Under the influence of the pump's suction, the sewage rapidly permeates the inner wall of the filter chamber and enters the circulation chamber, where impurity particles are trapped. Once inside the circulation chamber, sewage flows into the pump 1 through the outlet 22, completing the filtration, suction, and transportation of the sewage.

[0030] When sewage passes through the outlet 22, the rapidly flowing water impacts the driving impeller 31, generating a rotational force, which in turn drives the rotating drive shaft 3. When the rotating drive shaft 3 rotates, it simultaneously drives the rotating scraper shaft 4 to rotate. During the rotation process, the rotating scraper shaft 4 contacts impurities and dirt attached to the interior of the filter chamber and scrapes them away, effectively preventing dirt from depositing and ensuring that the filter chamber maintains good filtration flow.

[0031] When the water flow detector detects a decrease in water flow, it indicates excessive particulate matter within the filter chamber, making it impossible to maintain a stable flow rate solely through the rotation of the rotating scraper shaft 4. At this point, the cleaning sleeve 5 releases its seal on the rotating scraper shaft 4. Subsequently, the pretreatment mechanism activates the switching linear actuator 6, which drives the rotating scraper shaft 4 through the slag discharge port 23 and into the cleaning sleeve 5. As the rotating scraper shaft 4 moves, accumulated dirt in the filter chamber is simultaneously moved into the cleaning sleeve 5, quickly restoring the filter chamber's flow efficiency. Once the rotating scraper shaft 4 reaches its designated position, the cleaning sleeve 5 re-seals the rotating scraper shaft 4, preventing water from flowing into the double-layer filter sleeve 2. The cleaning sleeve 5 then cleans the rotating scraper shaft 4, and the resulting dirt and impurities fall into the wastewater collection tank 7 for further processing. While the rotating scraper shaft 4 is being cleaned, the double-layer filter sleeve 2 can continue to circulate wastewater normally, ensuring continuous operation and effectively improving the stability and efficiency of the equipment.

[0032] See also Figures 1 to 5 As shown, the interior of the double-layer filtering sleeve 2 is divided into a filtering chamber and a flow chamber by a filtering sleeve 24 . The filtering sleeve 24 is detachably connected to the double-layer filtering sleeve 2 . A switching filtering mechanism 25 is also installed at the liquid inlet 21 of the double-layer filtering sleeve 2 .

[0033] The inner wall of the filter sleeve 24 is used to filter impurities in the sewage. The water flow rate is monitored in real time by a water flow detector. When a decrease in the water flow rate is detected, it indicates that there are too many particulate dirt inside the filter chamber, and the rotation of the rotating scraper shaft 4 alone is no longer able to maintain a stable flow rate. At this time, the pretreatment mechanism starts the switching filter mechanism 25, which performs preliminary filtration on the sewage flowing in from the liquid inlet 21 to prevent impurities and dirt from entering the filter sleeve 24 during the subsequent removal of the rotating scraper shaft 4. Subsequently, the cleaning sleeve 5 releases the sealing limit on the rotating scraper shaft 4, and the pretreatment mechanism starts the switching linear drive 6. The telescopic end of the switching linear drive 6 moves, driving the rotating scraper shaft 4 from the slag discharge port 23 into the cleaning sleeve 5. During the movement of the rotating scraper shaft 4, the dirt accumulated in the filter chamber is simultaneously driven into the cleaning sleeve 5, so that the filter chamber quickly restores its circulation efficiency.

[0034] When the rotating scraper shaft 4 moves to the specified position, the cleaning sleeve 5 will seal and limit the rotating scraper shaft 4 again to prevent the water in the double-layer filter sleeve 2 from flowing into the cleaning sleeve 5, thereby avoiding affecting the normal sewage filtration process. Subsequently, the cleaning sleeve 5 cleans the rotating scraper shaft 4, and the dirt and impurities generated by the cleaning fall into the sewage collection box 7 under the action of gravity for subsequent unified treatment. During the cleaning process of the rotating scraper shaft 4, since the switching filter mechanism 25 is still working, the double-layer filter sleeve 2 can still perform sewage circulation operations normally, achieving non-stop operation and effectively improving the stability and work efficiency of the equipment operation. After the cleaning is completed, the rotating scraper shaft 4 is reset, the switching filter mechanism 25 stops working, and the normal filtering working state is restored. At the same time, since the filter sleeve 24 is detachably connected to the double-layer filter sleeve 2, when the filter sleeve 24 is damaged or the filtering effect is reduced, it can be easily replaced and maintained to ensure the long-term stable operation of the double-layer filter sleeve 2.

[0035] See also Figures 1 to 5 As shown, the switching filter mechanism 25 includes a rotating mounting frame 251 rotatably mounted on the liquid inlet 21 of the double-layer filtering sleeve 2, a sewage filter layer 252 is provided on the rotating mounting frame 251, and a rotating driver 253 driving the rotating mounting frame 251 to rotate.

[0036] The water flow rate is monitored in real time using a water flow detector. When a decrease in water flow is detected, it indicates that there is too much particulate dirt inside the filter chamber, and relying solely on the rotation of the scraper shaft 4 to maintain a stable flow rate is no longer possible. At this time, the filter mechanism 25 is switched on. The rotary driver 253 begins to operate, driving the rotary mounting frame 251 to rotate 90 degrees, so that the rotary mounting frame 251 and the liquid inlet 21 remain coaxial. Because the rotary mounting frame 251 is provided with a sewage filter layer 252, when the rotary mounting frame 251 is rotated into place, the sewage filter layer 252 is located between the liquid inlet 21 and the filter chamber, and can perform preliminary filtration on the sewage flowing in from the liquid inlet 21. Impurities in the sewage are blocked by the sewage filter layer 252, preventing impurities and dirt from entering the filter sleeve 24 during the subsequent removal of the scraper shaft 4, ensuring that the scraper shaft 4 can be stably reset after cleaning.

[0037] See also Figures 3 to 5 As shown, a limit mounting hole 41 is provided at the axial center position of the rotating scraper shaft 4, and the limit mounting hole 41 is mounted on the outside of the rotating drive shaft 3. A spiral blade 43 is provided on the outside of the rotating scraper shaft 4, and a rubber scraper strip 431 is provided on the edge of the spiral blade 43. Sealing blocks 42 are installed at both ends of the rotating scraper shaft 4.

[0038] A limited mounting hole 41 is provided at the axis of the rotary scraper shaft 4. This limited mounting hole 41 is fitted onto the outside of the rotary drive shaft 3. Through a limited sliding connection, the rotary scraper shaft 4 can both rotate synchronously with the rotary drive shaft 3 and slide axially on the rotary drive shaft 3. A spiral blade 43 is provided on the outside of the rotary scraper shaft 4, and a rubber scraping strip 431 is attached to the edge of the spiral blade 43. This design increases the contact area with the inner wall of the filter chamber and impurities and dirt, thereby improving the scraping effect.

[0039] When the sewage pump 1 is activated, sewage flows into the filter chamber through the liquid inlet 21 of the double-layer filter casing 2. Under the influence of the pump's suction, the sewage rapidly permeates the inner wall of the filter chamber and enters the flow chamber, trapping any impurities in the sewage within. As the sewage passes through the outlet 22, the rapidly flowing water impacts the drive impeller 31, generating a rotational force that in turn drives the rotary drive shaft 3. Because the rotary scraper shaft 4 is mounted on the rotary drive shaft 3 through the retaining mounting holes 41, the rotation of the rotary drive shaft 3 simultaneously drives the rotary scraper shaft 4. As the rotary scraper shaft 4 rotates, its outer spiral blades 43 rotate with it. The rubber scraping strips 431 on the edges of the spiral blades 43 come into close contact with impurities and dirt adhering to the interior of the filter chamber, scraping and dislodging the dirt. As the spiral blades 43 continue to rotate, dirt is gradually transported toward one end of the filter chamber, effectively preventing dirt from accumulating within the filter chamber and ensuring good filtration flow, thereby improving the filtration effect and flow efficiency of the sewage.

[0040] The water flow rate is monitored in real time by a water flow detector. When a decrease in the water flow rate is detected, it indicates that there are too many particles and dirt inside the filter chamber, and it is no longer possible to maintain a stable flow rate by simply rotating the rotating scraper shaft 4. At this time, the pretreatment mechanism starts to switch the linear drive 6, switches the telescopic end of the linear drive 6, and drives the rotating scraper shaft 4 to move along the rotating drive shaft 3 from the slag outlet 23 to the cleaning sleeve 5. During the movement of the rotating scraper shaft 4, the blocking block 42 will push the impurities accumulated in the filter chamber to move synchronously, ensuring that all accumulated impurities can be removed from the filter chamber. When the rotating scraper shaft 4 moves to the specified position, the blocking block 42 cooperates closely with the cleaning sleeve 5 to achieve a blocking function, effectively preventing the water in the double-layer filter sleeve 2 from flowing into the cleaning sleeve 5, thereby avoiding affecting the normal sewage filtration process.

[0041] After the rotating scraper shaft 4 enters the cleaning sleeve 5, the cleaning sleeve 5 cleans the rotating scraper. During the cleaning process, the dirt and impurities attached to the spiral blades 43 outside the rotating scraper shaft 4 are washed off by the cleaning liquid and fall into the sewage collection box 7 at the bottom of the cleaning sleeve 5 under the action of gravity.

[0042] See also Figures 1 to 10As shown, a feed port 51 is provided at one end of the cleaning sleeve 5, a strip-shaped discharge port 52 is provided on the side wall of the cleaning sleeve 5, a mounting bracket 53 is fixedly installed on the outer side of the cleaning sleeve 5, a plurality of water spray pipes 56 are installed on the inner wall of the cleaning sleeve 5, and a plurality of water outlet holes are provided on the water spray pipes 56. A gap sealing device 54 is installed on the feed port 51 of the cleaning sleeve 5, and a closing device 55 is installed on the strip-shaped discharge port 52 of the cleaning sleeve 5.

[0043] The feed port 51 of the cleaning sleeve 5 is equipped with a gap sealing device 54 . Under normal working conditions, the gap sealing device 54 can seal the rotating scraper shaft 4 staying at the feed port 51 , effectively preventing the sewage in the circulation chamber from flowing into the cleaning sleeve 5 .

[0044] When the water flow detector detects a decrease in water flow, indicating that there are too many particles and dirt inside the filter chamber, the pretreatment mechanism starts to switch the linear drive 6, preparing to drive the rotating scraper shaft 4 into the cleaning sleeve 5 for cleaning. At this time, the gap sealing device 54 first releases the sealing state with the rotating scraper shaft 4, providing a channel for the movement of the rotating scraper shaft 4. Subsequently, the telescopic end of the switching linear drive 6 moves, driving the rotating scraper shaft 4 to move from the slag outlet 23 of the filter double-layer sleeve 2 through the feed port 51 to the inside of the cleaning sleeve 5. When the rotating scraper shaft 4 moves to the specified position, the gap sealing device 54 starts again to seal the rotating scraper shaft 4 and the feed port 51 to prevent the water in the filter double-layer sleeve 2 from flowing into the cleaning sleeve 5 during the subsequent cleaning process, thereby avoiding affecting the normal sewage filtration process.

[0045] When the rotating scraper shaft 4 moves to the designated position, the sealing device 55 at the strip-shaped outlet 52 of the cleaning sleeve 5 opens, and the water spray pipe 56 begins to operate. The water spray pipe 56 sprays water through multiple outlet holes toward the rotating scraper shaft 4, flushing it. The high-speed water flow quickly impacts dirt and impurities adhering to the rotating scraper shaft 4, removing them from the surface. Under the influence of gravity, the washed dirt and impurities flow out of the cleaning sleeve 5 through the opened strip-shaped outlet 52 and ultimately fall into the wastewater collection tank 7 installed at the bottom of the cleaning sleeve 5.

[0046] See also Figures 7 to 10 As shown, the gap sealing device 54 includes a sealing air ring 541 installed at the feed port 51 of the cleaning sleeve 5, and the gap sealing device 54 also includes an extrusion sleeve 542 installed on the mounting bracket 53. A pushing air bag 544 is installed inside the extrusion sleeve 542. The pushing air bag 544 is connected to the sealing air ring 541 through an air pipe 545. A pushing linear drive 543 is also installed on the extrusion sleeve 542, and the telescopic end of the pushing linear drive 543 extends toward the interior of the extrusion sleeve 542.

[0047] Under normal operating conditions, to prevent sewage from the circulation chamber from flowing into the cleaning sleeve 5, the gap sealing device 54 must effectively seal the rotating scraper shaft 4, which is stationary at the feed port 51. At this point, the push linear actuator 543 is activated, and the telescopic end of the push linear actuator 543 extends into the extrusion sleeve 542, applying pressure to the push airbag 544 mounted within the extrusion sleeve 542. When the push airbag 544 is subjected to pressure, the air inside is squeezed, increasing the air pressure. Because the push airbag 544 is connected to the sealing air ring 541 mounted at the feed port 51 of the cleaning sleeve 5 via the air supply pipe 545, high-pressure air enters the sealing air ring 541 through the air supply pipe 545. The sealing air ring 541 expands under the action of air pressure, tightly filling the gap between the rotating scraper shaft 4 and the feed port 51, forming a reliable sealing barrier that effectively prevents sewage from flowing from the circulation chamber into the cleaning sleeve 5, ensuring the independence of the sewage flow path within the double-layer filter sleeve 2 and maintaining the normal suction and filtration operations of the sewage pump 1.

[0048] When the water flow detector detects a decrease in water flow, indicating excessive particulate matter inside the filter chamber, the pretreatment mechanism activates the switching linear actuator 6, driving the rotating scraper shaft 4 into the cleaning sleeve 5 for cleaning. During this process, the gap sealing device 54 releases its seal, providing a path for the rotating scraper shaft 4 to move. At this point, the telescopic end of the pushing linear actuator 543 retracts, releasing the pressure on the pushing airbag 544. The air pressure inside the pushing airbag 544 decreases, gradually returning to its original state. The air in the sealing air ring 541 flows back into the pushing airbag 544 through the air supply pipe 545, causing the sealing air ring 541 to reset and stop expanding, eliminating the sealing effect between the rotating scraper shaft 4 and the feed inlet 51. This allows the rotating scraper shaft 4, driven by the switching linear actuator 6, to move smoothly from the slag discharge port 23 of the double-layer filter sleeve 2, through the feed inlet 51, and into the cleaning sleeve 5 without being obstructed by the sealing air ring 541.

[0049] See also Figures 7 to 10 As shown, the closing device 55 includes a closing strip 551 installed on the strip-shaped discharge port 52, the closing strip 551 is slidably connected to the mounting bracket 53, and a spring 552 is installed between the closing strip 551 and the mounting bracket 53. The closing device 55 also includes a bidirectional ball screw slide 553 installed on the mounting bracket 53, and two pushing rings 554 are installed on the movable end of the bidirectional ball screw slide 553. The pushing ring 554 is slidably connected to the cleaning sleeve 5, and the pushing ring 554 is provided with a pushing bevel 555.

[0050] When the rotating scraper shaft 4 moves to a designated position within the cleaning sleeve 5 and it is time to clean the rotating scraper shaft 4 and remove dirt particles from the cleaning sleeve 5, the sealing device 55 is activated. The bidirectional ball screw slide 553 begins operating, and the movable end of the bidirectional ball screw slide drives the two push collars 554 to move away from each other along the cleaning sleeve 5. As the push collars 554 move, the push angle 555, which was originally in contact with the sealing strip 551, gradually disengages from the sealing strip 551, and the sealing strip 551 loses the pressure of the push collars 554. At this point, the spring 552 installed between the sealing strip 551 and the mounting bracket 53 begins to act due to its own elastic restoring force, pushing the sealing strip 551 away from the strip discharge port 52 until the sealing strip 551 is completely separated from the strip discharge port 52. At this point, the strip discharge port 52 is fully open, providing a channel for the discharge of dirt and impurities from the cleaning sleeve 5. Subsequently, the water spray pipe 56 inside the cleaning sleeve 5 starts to work to flush the rotating scraper shaft 4. The dirt and impurities flushed down flow out of the cleaning sleeve 5 from the opened strip discharge port 52 under the action of gravity, and finally fall into the sewage collection box 7 installed at the bottom of the cleaning sleeve 5.

[0051] After the dirt and impurities are discharged, the strip discharge port 52 needs to be closed to prevent the sewage in the filter double-layer sleeve 2 from leaking from the strip discharge port 52 during the subsequent resetting of the rotating scraper shaft 4 and the normal operation of the equipment. At this time, the bidirectional ball screw slide 553 is started again, and the movable end of the bidirectional ball screw slide drives the two pushing rings 554 to move closer to each other along the cleaning sleeve 5. During the movement, the pushing bevel 555 on the pushing ring 554 first contacts the closing strip 551. Due to the inclined design of the pushing bevel 555, as the pushing ring 554 continues to approach, the pushing bevel 555 will guide the closing strip 551 to move toward the strip discharge port 52. When the two pushing rings 554 are completely fitted onto the closing strip 551, the closing strip 551 fits tightly against the strip discharge port 52, achieving a stable closure of the strip discharge port 52. This sealing method utilizes the guiding effect of the push angle 555 and the sleeve structure of the push collar 554 to ensure a more stable seal between the sealing strip 551 and the strip-shaped discharge port 52 and provide greater pressure resistance. When the rotating scraper shaft 4 is switched to enter the cleaning sleeve 5, it effectively prevents large amounts of sewage from leaking from the strip-shaped discharge port 52, ensuring stability during the equipment switching process and guaranteeing the normal operation of the sewage purification mechanism for the sewage pump 1.

[0052] See also Figures 1 to 5 As shown, the sewage collection box 7 includes a limiting slide rail 71 slidably connected to the mounting bracket 53 , and a detachable filter layer plate 72 is provided on the sewage collection box 7 .

[0053] As the cleaning sleeve 5 cleans the rotating scraper shaft 4, high-speed water jets from the water spray pipe 56 wash away dirt and impurities adhering to the rotating scraper shaft 4. This mixture of dirt and impurities, combined with the cleaning water, flows under the influence of gravity through the strip-shaped discharge port 52 provided in the sidewall of the cleaning sleeve 5 and directly into the wastewater collection tank 7 mounted below. This tank 7 provides a storage space for the mixture of dirt and impurities and cleaning water, thus collecting cleaning waste. Furthermore, the tank 7 is slidably connected to the mounting bracket 53 via a limit rail 71, which provides stable support and guidance for the tank 7.

[0054] When the mixture of dirt, impurities, and wash water falls into the sewage collection tank 7, the wash water, due to its fluidity, is able to penetrate downward through the pores in the filter layer 72, while the dirt and impurities are trapped above the filter layer 72. This solid-liquid separation method effectively reduces the solid particle content in the sewage, facilitates subsequent further treatment or discharge of the sewage, and improves the efficiency and quality of sewage treatment.

[0055] The removable filter plate 72 facilitates maintenance of the sewage collection tank 7. Over extended use, the filter plate 72 can trap large amounts of dirt and impurities, leading to a decrease in filtration efficiency. In this case, the filter plate 72 can be smoothly removed from the mounting bracket 53 using the retaining rails 71. The filter plate 72 can then be easily removed for cleaning or replacement. Cleaning simply removes accumulated dirt and impurities from the filter plate 72 to restore its filtration performance. If the filter plate 72 is severely damaged, it can be simply replaced with a new one.

[0056] Specific working principle: When sewage pump 1 is activated, the suction force generated forces sewage into the pump 1 through the pretreatment mechanism and is then transported to a designated area. During the suction process, sewage flows from the inlet 21 of the double-layer filter casing 2 into the filter chamber. Under the influence of the pump's suction, the sewage rapidly permeates the inner wall of the filter chamber and enters the circulation chamber, where impurity particles are trapped. Once inside the circulation chamber, sewage flows into the pump 1 through the outlet 22, completing the filtration, suction, and transportation of the sewage.

[0057] When sewage passes through the outlet 22, the rapidly flowing water impacts the driving impeller 31, generating a rotational force, which in turn drives the rotating drive shaft 3. When the rotating drive shaft 3 rotates, it simultaneously drives the rotating scraper shaft 4 to rotate. During the rotation process, the rotating scraper shaft 4 contacts impurities and dirt attached to the interior of the filter chamber and scrapes them away, effectively preventing dirt from depositing and ensuring that the filter chamber maintains good filtration flow.

[0058] When the water flow detector detects a decrease in water flow, it indicates excessive particulate matter within the filter chamber, making it impossible to maintain a stable flow rate solely through the rotation of the rotating scraper shaft 4. At this point, the cleaning sleeve 5 releases its seal on the rotating scraper shaft 4. Subsequently, the pretreatment mechanism activates the switching linear actuator 6, which drives the rotating scraper shaft 4 through the slag discharge port 23 and into the cleaning sleeve 5. As the rotating scraper shaft 4 moves, accumulated dirt in the filter chamber is simultaneously moved into the cleaning sleeve 5, quickly restoring the filter chamber's flow efficiency. Once the rotating scraper shaft 4 reaches its designated position, the cleaning sleeve 5 re-seals the rotating scraper shaft 4, preventing water from flowing into the double-layer filter sleeve 2. The cleaning sleeve 5 then cleans the rotating scraper shaft 4, and the resulting dirt and impurities fall into the wastewater collection tank 7 for further processing. While the rotating scraper shaft 4 is being cleaned, the double-layer filter sleeve 2 can continue to circulate wastewater normally, ensuring continuous operation and effectively improving the stability and efficiency of the equipment.

[0059] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. A sewage purification mechanism for a sewage pump, comprising a pretreatment mechanism installed at the input end of a sewage pump (1), characterized in that: The pretreatment mechanism comprises a filtering double-layer casing (2) installed at the input end of a sewage pump (1), a filtering chamber and a circulation chamber are provided inside the filtering double-layer casing (2), the inner wall of the filtering chamber is communicated with the circulation chamber, a liquid inlet (21) is provided on one side of the filtering chamber, a slag outlet (23) is provided at one end of the filtering chamber away from the liquid inlet (21), a water outlet (22) communicated with the sewage pump (1) is provided at one end of the circulation chamber, a rotating drive shaft (3) is rotatably installed at the axis position of the filtering double-layer casing (2), and a driving impeller (31) is installed on the rotating drive shaft (3) The driving impeller (31) is arranged at the water outlet (22), a rotating scraper shaft (4) is installed on the rotating drive shaft (3), the rotating scraper shaft (4) is limitedly slidably connected to the rotating drive shaft (3), the rotating scraper shaft (4) is arranged at the axis center of the filter chamber, the slag outlet (23) of the double-layer filter sleeve (2) is installed with a cleaning sleeve (5), a sewage collection box (7) is installed at the bottom of the cleaning sleeve (5), and a switching linear drive (6) is also installed on the cleaning sleeve (5), and the telescopic end of the switching linear drive (6) is connected to the rotating scraper shaft (4).

2. A sewage purification mechanism for a sewage pump according to claim 1, characterized in that: The interior of the filtering double-layer sleeve (2) is divided into a filtering chamber and a flow chamber by a filtering sleeve (24). The filtering sleeve (24) is detachably connected to the filtering double-layer sleeve (2). The liquid inlet (21) of the filtering double-layer sleeve (2) is also equipped with a switching filtering mechanism (25).

3. A sewage purification mechanism for a sewage pump according to claim 2, characterized in that: The switching filter mechanism (25) comprises a rotating mounting frame (251) rotatably mounted on the liquid inlet (21) of the filtering double-layer casing (2), a sewage filter layer (252) being provided on the rotating mounting frame (251), and a rotating driver (253) driving the rotating mounting frame (251) to rotate.

4. The sewage purification mechanism for a sewage pump according to claim 1, characterized in that: A limit mounting hole (41) is provided at the axis center of the rotary scraper shaft (4), and the limit mounting hole (41) is sleeved on the outer side of the rotary drive shaft (3). A spiral blade (43) is provided on the outer side of the rotary scraper shaft (4), and a rubber scraping strip (431) is provided on the edge of the spiral blade (43). Blocking blocks (42) are installed at both ends of the rotary scraper shaft (4).

5. The sewage purification mechanism for a sewage pump according to claim 1, characterized in that: One end of the cleaning sleeve (5) is provided with a feed port (51), a side wall of the cleaning sleeve (5) is provided with a strip-shaped discharge port (52), a mounting bracket (53) is fixedly installed on the outer side of the cleaning sleeve (5), a plurality of water spray pipes (56) are installed on the inner wall of the cleaning sleeve (5), a plurality of water outlet holes are provided on the water spray pipes (56), a gap sealing device (54) is installed on the feed port (51) of the cleaning sleeve (5), and a closing device (55) is installed on the strip-shaped discharge port (52) of the cleaning sleeve (5).

6. The sewage purification mechanism for a sewage pump according to claim 5, characterized in that: The gap sealing device (54) includes a sealing air ring (541) installed at the feed port (51) of the cleaning sleeve (5). The gap sealing device (54) also includes an extrusion sleeve (542) installed on the mounting bracket (53). A pushing air bag (544) is installed inside the extrusion sleeve (542). The pushing air bag (544) is connected to the sealing air ring (541) through an air supply pipe (545). A pushing linear driver (543) is also installed on the extrusion sleeve (542). The telescopic end of the pushing linear driver (543) extends toward the interior of the extrusion sleeve (542).

7. The sewage purification mechanism for a sewage pump according to claim 5, characterized in that: The closing device (55) includes a closing strip (551) mounted on the strip-shaped discharge port (52), the closing strip (551) being slidably connected to the mounting bracket (53), a spring (552) being installed between the closing strip (551) and the mounting bracket (53), the closing device (55) further including a bidirectional ball screw slide (553) mounted on the mounting bracket (53), two pushing collars (554) being installed on the movable end of the bidirectional ball screw slide (553), the pushing collar (554) being slidably connected to the cleaning sleeve (5), and a pushing bevel (555) being provided on the pushing collar (554).

8. The sewage purification mechanism for a sewage pump according to claim 5, characterized in that: The sewage collection box (7) includes a limiting slide rail (71) provided thereon and slidably connected to the mounting bracket (53). The sewage collection box (7) is provided with a detachable filter layer plate (72).

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