A type of suspended submersible sewage pump

Abstract

This application provides a suspended submersible sewage pump, relating to the field of sewage pumps. It includes a pump body, an impeller disposed within the pump body, an outlet disposed on the pump body, and a fixed base disposed at the bottom of the pump body. To address the problem in existing suspended submersible sewage pumps where impurities and debris easily adhere to the outside of the inlet screen during operation, reducing its conveying efficiency, this application employs a scraping mechanism to remove impurities and debris from the filter screen surface, improving the filter screen's conveying efficiency and preventing impurities and debris from clogging the filter screen and affecting the normal operation of the pump. The scraping mechanism also solves the problem of cumbersome filter screen replacement affecting work efficiency in existing technologies; it addresses the problem of accelerated filter screen wear caused by mechanical cleaning methods in existing technologies; and it solves the problem of increased manual maintenance costs due to impurity accumulation in existing technologies.

Description

Technical Field

[0001] This invention relates to the field of sewage pumps, and more specifically, to a suspended submersible sewage pump. Background Technology

[0002] Submersible suspended sewage pumps are widely used in urban sewage treatment plants for transporting sludge and sewage. Their submersible design allows them to operate underwater, unaffected by surface fluctuations, ensuring stable sewage transport and improving sewage treatment efficiency. However, sewage contains a large amount of impurities and debris, which can easily adhere to the outside of the inlet screen, causing it to become clogged. Clogged inlet screens reduce the amount of sewage entering the pump, thus lowering the transport efficiency of the submersible suspended sewage pump.

[0003] For example, the specification of the "Suspended Submersible Sewage Pump" disclosed in Chinese Invention Patent (Application No.: 202111540131.5) states that the pump body draws water through the inlet screen at its lower end during operation. However, when the pump body is operating, the bottom of the water contains a large amount of impurities and garbage, which easily adhere to the outside of the inlet screen, causing the inlet screen to become blocked, thus affecting the subsequent normal water intake. The above patent can corroborate the defects of the prior art.

[0004] Therefore, we made improvements and proposed a suspended submersible sewage pump. Summary of the Invention

[0005] The purpose of this invention is to address the problem that impurities and debris easily adhere to the outside of the inlet screen of existing suspended submersible sewage pumps during operation, thus reducing their conveying efficiency.

[0006] To achieve the above-mentioned objectives, the present invention provides a suspended submersible sewage pump to improve the aforementioned problems.

[0007] The application is as follows:

[0008] Includes a pump body, an impeller disposed within the pump body, an outlet disposed on the pump body, a fixed base disposed at the bottom of the pump body, a base disposed on the fixed base, a filter screen disposed within the fixed base, and a scraping mechanism disposed on the fixed base.

[0009] The scraping mechanism includes a rectangular frame disposed on the outside of the fixed base, a drive shaft rotatably disposed on the rectangular frame, a roller disposed on the drive shaft, a scraper disposed on the roller, a sliding ring disposed in the fixed base, a connecting plate rotatably disposed on the sliding ring, and a connecting shaft disposed on the connecting plate.

[0010] As a preferred technical solution of this application, the connecting plate is provided with a plurality of through holes, the filter screen is disposed on the connecting plate, and the end of the connecting shaft away from the connecting plate is disposed on the impeller.

[0011] As a preferred technical solution of this application, a transmission shaft is rotatably mounted on the fixed base, and the transmission shaft and the drive shaft are connected by a universal joint.

[0012] As a preferred technical solution of this application, the fixed base is provided with an installation groove, the rectangular frame is provided with an L-shaped rod, the L-shaped rod and the installation groove are adapted to each other, the fixed base is provided with a sliding cavity, a limit post is slidably provided on the fixed base, a limit hole is provided on the L-shaped rod, the limit hole and the limit post are adapted to each other, a jacking ring is provided on the limit post, the jacking ring is slidably provided in the sliding cavity, a spring is provided on the outside of the limit post, the two ends of the spring are respectively connected to the corresponding surfaces of the jacking ring and the sliding cavity, and a transmission block is provided on the limit post.

[0013] As a preferred technical solution of this application, the transmission shaft is provided in two sets, and the two sets of transmission shafts are respectively provided with a drive gear and a transmission gear, and the drive gear and the transmission gear are adapted to each other.

[0014] As a preferred technical solution of this application, a worm gear is rotatably mounted on the fixed base, and a worm wheel is mounted on the transmission shaft, wherein the worm gear and the worm wheel are mutually adapted.

[0015] As a preferred technical solution of this application, the fixed base is provided with a guide groove, the sliding ring is slidably disposed on the guide groove, the connecting shaft is provided with a strip groove, the connecting disc and the filter screen are both slidably disposed on the strip groove, the connecting disc is provided with a gear ring, the worm gear is provided with a synchronous gear, and the synchronous gear is rotatably disposed on the fixed base.

[0016] As a preferred technical solution of this application, the output ends of the synchronous gear and the gear ring are both wedge-shaped, and the synchronous gear and the gear ring are mutually adapted.

[0017] As a preferred technical solution of this application, a lead screw is rotatably mounted on the fixed base, the sliding ring and the lead screw are connected by a thread, an adjusting gear is mounted on the lead screw, an electric push rod is mounted on the fixed base, a drive rack is mounted on the output end of the electric push rod, and the drive rack and the adjusting gear are mutually adapted.

[0018] As a preferred technical solution of this application, a plurality of scrapers are provided, and the plurality of scrapers are respectively distributed alternately on the roller.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] In the scheme of this application:

[0021] 1. In order to solve the problem that impurities and garbage easily adhere to the outside of the inlet screen of the existing suspended submersible sewage pump during operation, thus reducing its conveying efficiency, this application provides a scraping mechanism to scrape off impurities and garbage from the surface of the filter screen, thereby improving the conveying efficiency of the filter screen and preventing impurities and garbage from clogging the filter screen and affecting the normal operation of the pump.

[0022] 2. By using a scraping mechanism, the scraper is released from contact with the filter screen by releasing the limit on the L-shaped rod, making it convenient for staff to replace the filter screen and solving the problem of cumbersome filter screen replacement affecting work efficiency in the existing technology;

[0023] 3. Through the designed scraping mechanism, the scraper and the filter screen make active contact. The movable scraper can adaptively adjust according to the actual situation of the filter screen surface, reducing the wear of the filter screen and the scraper, and solving the problem of accelerated filter screen wear caused by mechanical cleaning methods in the prior art;

[0024] 4. The scraping mechanism, by driving two sets of scrapers to rotate in opposite directions, can crush impurities and garbage in the sewage, reduce their volume, and allow them to pass through the filter screen and be discharged. This prevents impurities and garbage from accumulating at the bottom of the pump body, eliminating the need for manual removal of impurities and garbage, reducing maintenance costs, and solving the problem of increased manual maintenance costs caused by impurity accumulation in existing technologies. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of the suspended submersible sewage pump provided in this application;

[0026] Figure 2 A partial cross-sectional structural diagram of the pump body of the suspended submersible sewage pump provided in this application;

[0027] Figure 3 A partial cross-sectional view of the base structure of the suspended submersible sewage pump provided in this application;

[0028] Figure 4 A schematic diagram of the internal structure of the mounting base for the suspended submersible sewage pump provided in this application;

[0029] Figure 5 A schematic diagram of the overall structure of the drum and scraper of the suspended submersible sewage pump provided in this application;

[0030] Figure 6 The suspended submersible sewage pump provided in this application Figure 5 Enlarged structural diagram of area A in the middle;

[0031] Figure 7A schematic diagram of the overall structure of the sliding ring of the suspended submersible sewage pump provided in this application;

[0032] Figure 8 The suspended submersible sewage pump provided in this application Figure 7 A magnified structural diagram of area B in the middle.

[0033] The image shows:

[0034] 1. Pump body; 101. Impeller; 102. Water outlet;

[0035] 2. Fixed base; 201. Base; 202. Filter screen; 203. Scraping mechanism; 204. Rectangular frame; 205. Drive shaft; 206. Roller; 207. Scraper; 208. Sliding ring; 209. Connecting plate; 210. Connecting shaft; 211. Through hole; 212. Drive shaft; 213. Universal joint; 214. Mounting groove; 215. L-shaped rod; 216. Sliding cavity; 217. Limiting post; 218. Limiting hole; 219. Pushing ring; 220. Spring; 221. Transmission block; 222. Drive gear; 223. Transmission gear; 224. Worm; 225. Worm wheel; 226. Guide groove; 227. Strip groove; 228. Gear ring; 229. Synchronizing gear; 230. Lead screw; 231. Adjusting gear; 232. Electric push rod; 233. Drive rack. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0037] As described in the background section, when a suspended submersible sewage pump is in operation, impurities and garbage easily adhere to the outside of the inlet screen, reducing its conveying efficiency.

[0038] To address this technical problem, the present invention provides a suspended submersible sewage pump, which is applied to sewage pumps.

[0039] For details, please refer to Figures 1-8As shown, the suspended submersible sewage pump specifically includes: a pump body 1, an impeller 101 disposed inside the pump body 1, an outlet 102 disposed on the pump body 1, a fixed base 2 disposed at the bottom of the pump body 1, a base 201 disposed on the fixed base 2, a filter screen 202 disposed inside the fixed base 2, and a scraping mechanism 203 disposed on the fixed base 2. In the prior art, the impeller 101 rotates under the drive of the pump body 1. After sewage enters the impeller 101, it is subjected to centrifugal force and is thrown towards the outer edge of the impeller 101, so that the sewage is discharged from the outlet 102. The outlet 102 is the channel for sewage to be discharged from the pump body 1.

[0040] The scraping mechanism 203 includes a rectangular frame 204 disposed on the outside of the fixed base 2, a drive shaft 205 rotatably disposed on the rectangular frame 204, a roller 206 disposed on the drive shaft 205, a scraper 207 disposed on the roller 206, a sliding ring 208 disposed inside the fixed base 2, a connecting plate 209 rotatably disposed on the sliding ring 208, and a connecting shaft 210 disposed on the connecting plate 209.

[0041] The suspended submersible sewage pump provided by this invention addresses the problem in the prior art where impurities and debris easily adhere to the outside of the inlet screen during operation, reducing its conveying efficiency. This application utilizes a scraping mechanism 203 to scrape away impurities and debris from the surface of the filter screen 202, thereby improving the conveying efficiency of the filter screen 202 and preventing impurities and debris from clogging the filter screen 202 and affecting the normal operation of the pump body 1.

[0042] By using the scraping mechanism 203, the L-shaped rod 215 is released from its limit, allowing the scraper 207 to disengage from the filter screen 202, making it easier for staff to replace the filter screen 202. This solves the problem of inconvenient filter screen replacement affecting work efficiency in the prior art.

[0043] By using the scraping mechanism 203, the scraper 207 and the filter screen 202 are in active contact. The movably connected scraper 207 can adaptively adjust according to the actual surface conditions of the filter screen 202, reducing the wear of the filter screen 202 and the scraper 207. This solves the problem that mechanical cleaning methods in the prior art cause the filter screen 202 to wear faster.

[0044] By using the scraping mechanism 203 to drive the two sets of scrapers 207 to rotate in opposite directions, impurities and garbage in the sewage can be crushed, reducing their volume so that they can pass through the filter screen 202 and be discharged. This prevents impurities and garbage from accumulating at the bottom of the pump body 1, eliminating the need for manual removal of impurities and garbage, reducing maintenance costs, and solving the problem of increased manual maintenance costs caused by impurity accumulation in the prior art.

[0045] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0046] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0048] Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a suspended submersible sewage pump has multiple through holes 211 on its connecting plate 209, a filter screen 202 is provided on the connecting plate 209, and the end of the connecting shaft 210 away from the connecting plate 209 is provided on the impeller 101.

[0049] During use, the pump body 1 drives the impeller 101 to rotate, and sewage enters the pump body 1 through the filter screen 202 and the through hole 211. The rotation of the impeller 101 drives the connecting shaft 210, the connecting plate 209 and the filter screen 202 to rotate synchronously. The scraper 207 on the drum 206 is in contact with the filter screen 202. Through the rotation of the filter screen 202, the impurities and garbage on the surface of the filter screen 202 are scraped off by the scraper 207, thereby improving the conveying efficiency of the filter screen 202 and preventing impurities and garbage from clogging the filter screen 202 and affecting the normal operation of the pump body 1.

[0050] Furthermore, a drive shaft 212 is rotatably mounted on the fixed base 2, and the drive shaft 212 and the drive shaft 205 are connected by a universal joint 213;

[0051] The universal joint allows the roller 206 on the drive shaft 205 to be adjusted, which in turn allows the scraper 207 on the roller 206 to be movably connected. The movably connected scraper 207 can adaptively adjust according to the actual surface of the filter screen 202 to avoid excessive friction and reduce the wear of the scraper 207 itself. The fixedly connected scraper 207 may wear out quickly due to continuous high pressure on the filter screen 202 and the scraper 207.

[0052] Furthermore, the fixed base 2 is provided with an installation groove 214, and the rectangular frame 204 is provided with an L-shaped rod 215. The L-shaped rod 215 and the installation groove 214 are adapted to each other. The fixed base 2 is provided with a sliding cavity 216. A limit post 217 is slidably provided on the fixed base 2. A limit hole 218 is provided on the L-shaped rod 215. The limit hole 218 and the limit post 217 are adapted to each other. A top moving ring 219 is provided on the limit post 217. The top moving ring 219 is slidably provided in the sliding cavity 216. A spring 220 is provided on the outside of the limit post 217. The two ends of the spring 220 are respectively connected to the corresponding surfaces of the top moving ring 219 and the sliding cavity 216. A transmission block 221 is provided on the limit post 217.

[0053] The limiting hole 218 is made of rubber and is used to mate with the movable scraper 207. When the limiting post 217 and the limiting hole 218 are mated, as... Figure 6 As shown, the limiting post 217 is used to limit the L-shaped rod 215. When the transmission block 221 is pulled outward, the transmission block 221 drives the limiting post 217 and the jacking ring 219 to move synchronously. When the limiting post 217 disengages from the limiting hole 218, the limiting post 217 releases its restriction on the L-shaped rod 215. The rectangular frame 204 rotates through the action of the universal joint 213. The roller 206 and scraper 207 on the rectangular frame 204 rotate synchronously. At this time, the scraper 207 disengages from the filter screen 202, and the filter screen 202 is exposed, making it convenient for the staff to replace the filter screen 202.

[0054] The scraping mechanism 203 removes impurities and debris from the surface of the filter screen 202, improving the conveying efficiency of the filter screen 202 and preventing impurities and debris from clogging the filter screen 202 and affecting the normal operation of the pump body 1. Through the active contact between the scraper 207 and the filter screen 202, the movable scraper 207 can be adaptively adjusted according to the actual situation of the surface of the filter screen 202, reducing the wear of the filter screen 202 and the scraper 207. By releasing the limit on the L-shaped rod 215, the scraper 207 is disengaged from the filter screen 202, making it convenient for the staff to replace the filter screen 202.

[0055] Example 2 further optimizes the suspended submersible sewage pump provided in Example 1, specifically, as follows: Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, there are two sets of drive shafts 212, and drive gears 222 and transmission gears 223 are respectively provided on the two sets of drive shafts 212. The drive gears 222 and transmission gears 223 are adapted to each other.

[0056] When the drive gear 222 rotates, it drives the transmission gear 223 to rotate in the opposite direction. At this time, the transmission shaft 212 rotates, which drives the universal joint 213, drive shaft 205, roller 206 and scraper 207 to rotate. The two rollers 206 and scraper 207 rotate in the opposite direction. The reverse rotation of the scraper 207 crushes the impurities and garbage in the sewage, reducing their volume so that they can pass through the filter screen 202 and be discharged. This prevents impurities and garbage from accumulating at the bottom of the pump body 1. When there are too many impurities and garbage in the sewage, there is no need to manually remove them, reducing maintenance costs.

[0057] Furthermore, a worm gear 224 is rotatably mounted on the fixed base 2, and a worm wheel 225 is mounted on the transmission shaft 212. The worm gear 224 and the worm wheel 225 are adapted to each other. When the worm gear 224 rotates, the worm gear 224 drives the worm wheel 225 to rotate, the worm wheel 225 drives the transmission shaft 212 to rotate, the transmission shaft 212 drives the drive gear 222 to rotate, and the drive gear 222 drives the transmission gear 223 to rotate.

[0058] Furthermore, the fixed base 2 is provided with a guide groove 226, the sliding ring 208 is slidably disposed on the guide groove 226, the connecting shaft 210 is provided with a strip groove 227, the connecting disc 209 and the filter screen 202 are both slidably disposed on the strip groove 227, the connecting disc 209 is provided with a gear ring 228, the worm 224 is provided with a synchronous gear 229, and the synchronous gear 229 is rotatably disposed on the fixed base 2. When the sliding ring 208 slides along the guide groove 226, the connecting disc 209 and the filter screen 202 on the sliding ring 208 move synchronously along the strip groove 227. When the gear ring 228 on the connecting disc 209 and the synchronous gear 229 mesh, the connecting shaft 210 drives the gear ring 228 of the connecting disc 209 to rotate synchronously, the gear ring 228 drives the synchronous gear 229 to rotate, and the synchronous gear 229 drives the worm 224 to rotate.

[0059] Furthermore, the output ends of both the synchronous gear 229 and the gear ring 228 are wedge-shaped. The synchronous gear 229 and the gear ring 228 are adapted to each other, and the output ends of both the synchronous gear 229 and the gear ring 228 are wedge-shaped, so that the synchronous gear 229 and the gear ring 228 are prevented from getting stuck when meshing.

[0060] Furthermore, a lead screw 230 is rotatably mounted on the fixed base 2, and the sliding ring 208 and the lead screw 230 are connected by a thread. An adjusting gear 231 is mounted on the lead screw 230, and an electric push rod 232 is mounted on the fixed base 2. A drive rack 233 is mounted on the output end of the electric push rod 232. The drive rack 233 and the adjusting gear 231 are adapted to each other. By activating the electric push rod 232, the output end of the electric push rod 232 drives the drive rack 233 to move, the drive rack 233 drives the adjusting gear 231 to rotate, the adjusting gear 231 drives the lead screw 230 to rotate, and the lead screw 230 drives the sliding ring 208 to slide along the guide groove 226.

[0061] Furthermore, multiple scrapers 207 are provided, and the multiple scrapers 207 are staggered on the roller 206. The staggered design of the scrapers 207 allows the scrapers 207 on the two rollers 206 to crush the impurities and garbage in the sewage when they rotate, reducing the volume of the impurities and garbage.

[0062] By driving the two sets of scrapers 207 to rotate in opposite directions through the scraping mechanism 203, impurities and garbage in the sewage can be crushed, reducing their volume so that they can pass through the filter screen 202 and be discharged. This prevents impurities and garbage from accumulating at the bottom of the pump body 1, eliminating the need for manual removal of impurities and garbage and reducing maintenance costs.

[0063] The usage process of the suspended submersible sewage pump provided by this invention is as follows:

[0064] During operation, the pump body 1 is started, driving the impeller 101 to rotate. Wastewater enters the pump body 1 through the filter screen 202 and through hole 211. The rotation of the impeller 101 drives the connecting shaft 210, connecting disc 209, and filter screen 202 to rotate synchronously. The scraper 207 on the roller 206 is in contact with the filter screen 202. Through the rotating filter screen 202, impurities and debris on the surface of the filter screen 202 are scraped off by the scraper 207. When the filter screen 202 needs to be replaced, the transmission block 221 is pulled outward. The transmission block 221 drives the limiting post 217 and the jacking ring 219 to move synchronously. When the 17th pin disengages from the limiting hole 218, the limiting post 217 releases its restriction on the L-shaped rod 215. Through the action of the universal joint 213, the rectangular frame 204 rotates. The roller 206 and scraper 207 on the rectangular frame 204 rotate synchronously. At this time, the scraper 207 disengages from the filter screen 202, exposing the filter screen 202 for easy replacement by the operator. By activating the electric push rod 232, the output end of the electric push rod 232 drives the drive rack 233 to move, which in turn drives the adjusting gear 231 to rotate. The adjusting gear 231 then drives the lead screw 230 to rotate. 230 drives the sliding ring 208 to slide along the guide groove 226. The connecting disc 209 and the filter screen 202 on the sliding ring 208 move synchronously along the strip groove 227. When the gear ring 228 and the synchronous gear 229 on the connecting disc 209 mesh, the connecting shaft 210 drives the gear ring 228 of the connecting disc 209 to rotate synchronously. The gear ring 228 drives the synchronous gear 229 to rotate. The synchronous gear 229 drives the worm 224 to rotate. The worm 224 drives the worm wheel 225 to rotate. The worm wheel 225 drives the transmission shaft 212 to rotate. The transmission shaft 212 drives the drive gear 222 to rotate. The drive gear 222... 2 drives the transmission gear 223 to rotate, at which time the transmission shaft 212 rotates. The transmission shaft 212 drives the universal joint 213, drive shaft 205, roller 206 and scraper 207 to rotate. Among them, the two rollers 206 and scraper 207 rotate in opposite directions. The reverse rotation of scraper 207 crushes the impurities and garbage in the sewage, reduces the volume of impurities and garbage, and allows impurities and garbage to pass through filter screen 202 and be discharged. This prevents impurities and garbage from accumulating at the bottom of pump body 1. When there are too many impurities and garbage in the sewage, there is no need to manually remove the impurities and garbage, reducing maintenance costs.

[0065] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0066] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A suspended submersible sewage pump, comprising a pump body, an impeller disposed within the pump body, and a water outlet disposed on the pump body, characterized in that, It includes a fixed base disposed at the bottom of the pump body, a base disposed on the fixed base, a filter screen disposed inside the fixed base, and a scraping mechanism disposed on the fixed base; The scraping mechanism includes a rectangular frame disposed on the outside of the fixed base, a drive shaft rotatably disposed on the rectangular frame, a roller disposed on the drive shaft, a scraper disposed on the roller, a sliding ring disposed in the fixed base, a connecting plate rotatably disposed on the sliding ring, and a connecting shaft disposed on the connecting plate; A drive shaft is rotatably mounted on the fixed base, and the drive shaft and the drive shaft are connected by a universal joint; The drive shaft is provided in two sets, and each set of the drive shaft is provided with a drive gear and a transmission gear, which are mutually compatible. When the drive gear rotates, it drives the transmission gear to rotate in the opposite direction. At this time, the transmission shaft rotates, which in turn drives the universal joint, drive shaft, rollers, and scraper to rotate. The two rollers, together with the scraper, rotate in the opposite direction. The reverse rotation of the scraper crushes the impurities and garbage in the sewage, reducing their volume so that they can pass through the filter screen and be discharged. This prevents impurities and garbage from accumulating at the bottom of the pump body. When there are too many impurities and garbage in the sewage, there is no need to manually remove them.

2. The suspended submersible sewage pump according to claim 1, characterized in that, The connecting plate is provided with multiple through holes, the filter screen is disposed on the connecting plate, and the end of the connecting shaft away from the connecting plate is disposed on the impeller.

3. A suspended submersible sewage pump according to claim 2, characterized in that, The fixed base is provided with a mounting groove, and the rectangular frame is provided with an L-shaped rod. The L-shaped rod and the mounting groove are adapted to each other. The fixed base is provided with a sliding cavity. A limit post is slidably provided on the fixed base. A limit hole is provided on the L-shaped rod. The limit hole and the limit post are adapted to each other. A jacking ring is provided on the limit post. The jacking ring is slidably provided in the sliding cavity. A spring is provided on the outside of the limit post. The two ends of the spring are respectively connected to the corresponding surfaces of the jacking ring and the sliding cavity. A transmission block is provided on the limit post.

4. A suspended submersible sewage pump according to claim 3, characterized in that, A worm gear is rotatably mounted on the fixed base, and a worm wheel is mounted on the transmission shaft. The worm gear and the worm wheel are adapted to each other.

5. A suspended submersible sewage pump according to claim 4, characterized in that, The fixed base is provided with a guide groove, the sliding ring is slidably disposed on the guide groove, the connecting shaft is provided with a strip groove, the connecting disc and the filter screen are both slidably disposed on the strip groove, the connecting disc is provided with a gear ring, the worm gear is provided with a synchronous gear, and the synchronous gear is rotatably disposed on the fixed base.

6. A suspended submersible sewage pump according to claim 5, characterized in that, The output ends of both the synchronizing gear and the gear ring are wedge-shaped, and the synchronizing gear and the gear ring are mutually adapted.

7. A suspended submersible sewage pump according to claim 6, characterized in that, A lead screw is rotatably mounted on the fixed base. The sliding ring and the lead screw are connected by a thread. An adjusting gear is mounted on the lead screw. An electric push rod is mounted on the fixed base. A drive rack is mounted on the output end of the electric push rod. The drive rack and the adjusting gear are mutually compatible.

8. A suspended submersible sewage pump according to claim 7, characterized in that, The scraper is provided in multiple ways, and the multiple scrapers are distributed alternately on the roller.

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