A permanent magnet large flow submersible sewage pump

Abstract

The present application relates to a permanent magnet large flow submersible sewage pump, and relates to the field of submersible sewage pumps, which includes a pump body, a motor and an impeller. The pump body is provided with a water inlet and a water outlet, and the pump body is provided with a water inlet chamber. The impeller includes a rotating seat and blades, and the blades are inclined toward the direction close to the motor along the rotation direction of the rotating seat, and the blades abut against the inner wall of the water inlet chamber. The operation of the motor drives the impeller to rotate, and the impeller pushes the debris located in the water inlet chamber near the motor, so that the above-mentioned debris is pushed out of the space on one side of the water inlet chamber near the motor along the inclination direction of the blades as the blades rotate, and is pushed out from the water outlet, thereby reducing the accumulation of debris in the space on one side of the water inlet chamber near the motor, thereby reducing the situation where the debris blocks the impeller or the motor output shaft, making the rotation of the impeller more stable, thereby facilitating the stable operation of the submersible sewage pump.

Description

Technical Field

[0001] The present application relates to the field of submersible sewage pumps, and in particular to a permanent magnet large-flow submersible sewage pump. Background Art

[0002] Submersible sewage pump is an important equipment for deep well water extraction. When in use, the entire equipment submerges into the water to extract groundwater to the surface. It is often used in domestic water, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship loading and other fields.

[0003] For example, a Chinese utility model patent with patent announcement number CN204113672U discloses a submersible sewage pump, including a pump body with a water inlet and a water outlet, a connecting seat arranged on the upper part of the pump body and a motor structure arranged on the upper part of the connecting seat, the motor structure including a motor housing fixedly connected to the connecting seat, an upper end cover arranged on the upper part of the housing, a winding core arranged in the motor housing, a rotor arranged in the winding core and a rotating shaft passing through the rotor, the lower end of the rotating shaft passes through the connecting seat and extends into the pump body, an impeller is sleeved on the part of the rotating shaft located at the pump body, and a support structure for fixing the rotating shaft is provided between the upper end cover and the connecting seat, which has the advantages of low manufacturing cost and low processing difficulty.

[0004] When using the above-mentioned submersible sewage pump, foreign matter enters the pump body during the operation of the submersible sewage pump, and some of the foreign matter will remain in the space on one side of the impeller close to the motor structure. After long-term operation, the accumulation of foreign matter will cause the impeller or the shaft to be blocked, hindering the rotation of the impeller, and thus affecting the normal operation of the submersible sewage pump, which needs to be improved. Summary of the invention

[0005] In order to improve the problem of blockage in a submersible sewage pump, the present application provides a permanent magnet large-flow submersible sewage pump.

[0006] The present application provides a permanent magnet large flow submersible sewage pump adopts the following technical solution:

[0007] A permanent magnet large-flow submersible sewage pump comprises a pump body, a motor arranged on the pump body and an impeller rotatably connected to the pump body, the motor drives the impeller to rotate, a water inlet and a water outlet are provided on the pump body, a water inlet chamber is provided on the pump body, the impeller is located in the water inlet chamber, and the water inlet chamber is communicated with the water inlet and the water outlet, the impeller comprises a rotating seat rotatably connected to the pump body and blades arranged on the rotating seat, the blades are inclined toward the direction close to the motor along the rotation direction of the rotating seat, and the blades abut against the inner wall of the water inlet chamber.

[0008] By adopting the above technical solution, the operation of the motor drives the impeller to rotate, and the impeller abuts against the inner wall of the water inlet chamber, thereby pushing the debris located in the water inlet chamber near the motor, so that the above debris is pushed out of the space on one side of the water inlet chamber near the motor along the inclination direction of the blade as the blade rotates, and is pushed out from the water outlet during the continuous rotation of the blade, thereby reducing the accumulation of debris in the space on one side of the water inlet chamber near the motor, thereby reducing the situation where debris blocks the impeller or the output shaft of the motor, making the rotation of the impeller more stable, which is beneficial to the stable operation of the submersible sewage pump.

[0009] Preferably, a blade is coaxially provided on the rotating seat, and the blade is located on the side of the water inlet away from the impeller. A plurality of cutting ropes are provided on the pump body, and the cutting ropes cross the water outlet, and the plurality of cutting ropes are distributed at intervals in the transverse and longitudinal directions, and the cutting ropes are flush with the inner wall of the water inlet chamber.

[0010] By adopting the above technical solution, a blade and a cutting rope are provided. When debris enters the water inlet, the rotating blade cuts the debris to reduce the size of the debris, thereby reducing the situation where large-sized debris enters the water inlet chamber and then blocks the impeller or the water outlet. The debris entering the water inlet chamber is discharged from the water outlet under the action of the centrifugal force generated by the rotation of the impeller. During the discharge process, the debris moves toward the water outlet and abuts against the cutting rope through the blades, so that the cutting rope separates some of the debris that are gathered together and cuts some viscous debris to facilitate the discharge of the debris from the water outlet, thereby reducing the situation where the debris is too large in size or too much gathered and then blocks the water outlet.

[0011] Preferably, a plurality of through holes are spliced ​​between the cutting ropes and between the cutting ropes and the pump body, and the sizes of the plurality of through holes gradually increase in a direction away from the motor.

[0012] By adopting the above technical solution, through holes are set. When the blades rotate, the blades push the debris through several through holes in the direction away from the motor. Under the action of centrifugal force, smaller debris is discharged through the through holes first, and larger debris is discharged through the through holes later, thereby achieving orderly discharge of debris from small to large sizes, reducing the situation where a large amount of debris is discharged at the same time, and further reducing the probability of the water outlet being blocked.

[0013] Preferably, the cutting rope is an elastic rope, and a mounting block is slidably connected to the pump body, the mounting block is located at opposite ends of the cutting rope, and the mounting block slides close to or away from the cutting rope. An elastic member 1 is also provided on the pump body, and the elastic member 1 is connected to the mounting block so that the mounting block has a tendency to move away from the cutting rope.

[0014] By adopting the above technical solution, when the size of the debris is slightly larger than the size of the through hole, the blades press the debris against the cutting rope, and the cutting rope is deformed to enlarge the through hole to facilitate the discharge of the debris, so that more debris can be discharged, and at the moment of debris discharge, the cutting rope is quickly reset, and the elastic force generated will shake off part of the debris attached to the cutting rope, which can reduce the long-term attachment of the debris to the cutting rope and reduce the accumulation of debris. When the cutting rope is stretched due to long-term use, the elastic member will pull the cutting rope for a while so that the cutting rope remains stretched for a long time, so that the blades can abut the cutting rope to cut the debris.

[0015] Preferably, the pump body includes a main body, an extension portion threadedly connected to the main body and a mounting ring detachably connected to the extension portion, the mounting ring is located on a side of the extension portion close to the main body, the water inlet is provided on the main body, the water outlet is provided on the extension plate, the water inlet chamber is formed by splicing the main body and the extension portion, the cutting rope, the mounting block and the elastic member are all provided on the mounting ring; the cutting rope includes a rope body and a mounting head provided on the rope body, the mounting head is located at opposite ends of the rope body, and the mounting block is provided with a mounting groove for the mounting head to be inserted into and a connecting groove for the rope body to be inserted into.

[0016] By adopting the above technical solution, when the cutting rope breaks, the extension part can be twisted to remove the extension part from the main body, and then the mounting ring can be removed from the extension part, and then the mounting head can be taken out from the mounting groove, so that the rope body is separated from the connecting groove, and the cutting rope can be removed, and the mounting head of the new cutting rope can be inserted into the mounting groove, and the rope body is inserted into the connecting groove, and the cutting rope can be installed on the mounting ring, and then the mounting ring is installed on the extension part, and then the extension part is twisted to install it back on the main body, and the replacement of the cutting rope can be completed, making the replacement of the cutting rope more convenient.

[0017] Preferably, a clamping block is provided on the mounting block, and a clamping groove for the clamping block to be clamped into is provided on the inner wall of the water outlet.

[0018] By adopting the above technical solution, a clamping block and a clamping slot are provided. When the mounting ring is disassembled, the mounting block is moved so that the clamping block is disengaged from the clamping slot, and the mounting ring can be removed from the extension portion. When the mounting ring is installed, the clamping blocks on several mounting blocks are clamped into the clamping slots, and the installation of the mounting ring can be realized, making the installation and disassembly of the mounting ring more convenient. In addition, during use, when the elastic force of the cutting rope decreases, the elastic member pulls the cutting rope to straighten, driving the mounting block to move so that the clamping block is clamped deeper into the clamping slot, further improving the installation stability of the mounting ring.

[0019] Preferably, a scraper block is slidingly connected in the water inlet chamber, and the sliding direction of the scraper block is parallel to the rotation axis of the impeller. An elastic block is provided on the scraper block, and a through groove is opened on the elastic block, and the blade is inserted into the through groove. When the blade is located in the through groove, the blade is pressed against the two opposite inner walls of the through groove. An elastic member 2 is also provided on the pump body, and the elastic member 2 is pressed against the scraper block, so that the scraper block tends to approach the motor.

[0020] By adopting the above technical solution, an elastic block, a through groove and an elastic member 2 are provided. During the rotation of the blade, the blade is stuck in the through groove, driving the scraper block to slide away from the motor. At the same time, the inner wall of the through groove is pressed against the blade to scrape off the debris remaining on the surface of the blade. After the blade is scraped, the blade is separated from the elastic block, and the scraper block is reset under the action of the elastic member 2 to continue scraping the next blade, thereby reducing the accumulation and adhesion of debris on the blade, thereby reducing the situation where the blade is blocked by debris, which is beneficial to improving the stability of the blade rotation.

[0021] Preferably, guide surface one and guide surface two are provided on the inner wall of the through groove, and the guide surface one and guide surface two are respectively located on opposite sides of the through groove along the rotation axis of the impeller, and the guide surface one and guide surface two are close to each other along the rotation direction of the impeller.

[0022] By adopting the above technical solution, the first guide surface and the second guide surface are provided to guide the blade so that the blade can be inserted into the through groove.

[0023] Preferably, the elastic block is slidably connected to the scraper block, the sliding direction of the elastic block is perpendicular to the rotation axis of the impeller, and the scraper block is provided with an elastic member three, and the elastic member three is pressed against the elastic block, so that the elastic block has a tendency to move in the opposite direction of the rotation direction of the impeller.

[0024] By adopting the above technical solution, after the blade is inserted into the through groove, the blade continues to rotate, driving the elastic block to slide close to the scraper block. At this time, the elastic member three presses against the elastic block to buffer the elastic block, reducing the impact on the scraper block and the elastic block caused by the blade being inserted into the through groove. When the blade is separated from the through groove, the elastic member three pushes the elastic block to reset, causing the elastic block to move against the flow, thereby increasing the impact of the water flow on the elastic block, so that the water flow can wash off the debris adhered to the inner wall of the through groove, reducing the accumulation of debris in the through groove.

[0025] Preferably, a slide groove is provided on the inner wall of the water inlet chamber, the scraper block is slidably connected in the slide groove, and a scraping surface is provided on the outer wall of the scraper block. The scraping surface is located on opposite sides of the elastic block along the sliding direction of the scraper block, and the end of the scraping surface away from the elastic block abuts against the inner wall of the bottom of the slide groove.

[0026] By adopting the above technical solution and setting a scraping surface, when the blade drives the scraper block to move, the scraping surface scrapes out the debris entering the chute, reducing the accumulation of debris in the chute and blocking the chute, which is beneficial to improving the sliding stability of the scraper block.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. By setting the blades, the motor drives the impeller to rotate, and the impeller pushes the debris located in the water inlet chamber near the motor, so that the above debris is pushed out of the space on the side of the water inlet chamber near the motor along the inclination direction of the blade as the blade rotates, and is pushed out from the water outlet, which reduces the accumulation of debris in the space on the side of the water inlet chamber near the motor, thereby reducing the situation where the debris blocks the impeller or the motor output shaft, making the rotation of the impeller more stable, which is conducive to the stable operation of the submersible sewage pump;

[0029] 2. By setting the cutting rope and through holes, the debris moves towards the water outlet. The cutting rope separates some of the debris that are gathered together and cuts some sticky debris, reducing the situation where the debris is too large or too much and blocks the water outlet. When the blade rotates, the blade pushes the debris through several through holes to achieve orderly discharge of debris from small to large sizes, reducing the situation where a large amount of debris is discharged at the same time, and further reducing the probability of the water outlet being blocked;

[0030] 3. By arranging the elastic block and the elastic member 3, when the blade is inserted into the through groove, the inner wall of the through groove is pressed against the blade, the debris remaining on the surface of the blade is scraped off, and the elastic block is driven to slide close to the scraping block. The elastic member 3 buffers the elastic block, reducing the impact on the scraping block and the elastic block caused by the blade being inserted into the through groove. When the blade is separated from the through groove, the elastic member 3 pushes the elastic block to reset, so that the water flow can wash off the debris adhering to the inner wall of the through groove, reducing the accumulation of debris in the through groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an overall schematic diagram of an embodiment of the present application;

[0032] Figure 2 This is a structural diagram of a part of the pump body of the embodiment of the present application, mainly showing the structure of the impeller;

[0033] Figure 3 It is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the through hole;

[0034] Figure 4 for Figure 3 The enlarged view of the middle A part mainly shows the structure of the installation slot and the connection slot;

[0035] Figure 5 for Figure 2The enlarged view of the middle B part mainly shows the structure of the card block and the card slot;

[0036] Figure 6 for Figure 2 The enlarged view of the middle C part mainly shows the structure of the chute;

[0037] Figure 7 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the movable slot;

[0038] Figure 8 It is a partial exploded structural diagram of an embodiment of the present application, mainly showing the structures of the sliding part and the limiting part.

[0039] Description of reference numerals: 1, pump body; 11, main body; 111, water inlet; 12, extension; 121, water outlet; 13, mounting ring; 131, sliding groove; 2, motor; 3, impeller; 31, rotating seat; 32, blade; 4, water inlet chamber; 5, blade; 6, cutting rope; 61, rope body; 62, mounting head; 7, through hole; 8, mounting block; 81, mounting groove; 82, connecting groove; 9, limit strip; 91. yield groove; 10. elastic member 1; 14. clamping block; 141. connecting portion; 142. clamping portion; 15. clamping groove; 16. sliding groove; 17. scraping block; 171. movable groove; 18. limiting groove; 19. elastic block; 191. sliding portion; 192. limiting portion; 20. elastic member 3; 21. through groove; 211. guide surface 1; 212. guide surface 2; 22. scraping surface; 23. elastic member 2. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-8 This application is described in further detail.

[0041] The present application discloses a permanent magnet large flow submersible sewage pump. Figure 1 and Figure 2 The permanent magnet large flow submersible sewage pump comprises a pump body 1, a motor 2 and an impeller 3. The pump body 1 comprises a main body 11, an extension 12 and a mounting ring 13. The extension 12 is located on one side of the main body 11 along the horizontal direction and is threadedly connected to the main body 11. The mounting ring 13 is located on the side of the extension 12 close to the main body 11. The main body 11 and the extension 12 are spliced ​​to form a water inlet chamber 4. A water inlet 111 is provided on the outer side wall of the main body 11. The water inlet 111 is located below the water inlet chamber 4 and is connected to the water inlet chamber 4. A water outlet 121 is provided at one end of the extension 12 away from the main body 11, and the water outlet 121 is connected to the water inlet chamber 4.

[0042] See also Figure 2The motor 2 is located above the water inlet chamber 4 and fixed in the main body 11. The impeller 3 is located in the water inlet chamber 4. The impeller 3 includes a rotating seat 31 and a plurality of blades 32. The output shaft of the motor 2 is passed through the main body 11 and fixedly connected to the rotating seat 31. The motor 2 drives the rotating seat 31 to rotate, and the rotating axis of the rotating seat 31 is vertically arranged. The plurality of blades 32 are evenly spaced around the outer circumference of the rotating seat 31 and fixedly connected to the rotating seat 31. Each blade 32 is attached to the inner wall of the water inlet chamber 4, and each blade 32 is inclined toward the direction close to the motor 2 along the rotation direction of the rotating seat 31. In this embodiment, the motor 2 is a permanent magnet motor 2.

[0043] See also Figure 2 A blade 5 is coaxially fixed on the rotating seat 31. The blade 5 is located on the side of the water inlet 111 away from the impeller 3. In actual use, when the rotating seat 31 rotates, the rotating seat 31 drives the blade 5 to rotate to cut the debris.

[0044] See also Figure 3 and Figure 4 A plurality of cutting ropes 6 are installed on the mounting ring 13. The cutting ropes 6 are elastic ropes. The plurality of cutting ropes 6 are spaced apart in the transverse and longitudinal directions. Each cutting rope 6 includes a rope body 61 and two mounting heads 62. The rope body 61 crosses the water outlet 121 (see Figure 2 ), and the rope body 61 and the water inlet chamber 4 (see Figure 2 ) is flush with the inner wall, two mounting heads 62 are respectively located at opposite ends of the rope body 61 and are fixedly connected to the rope body 61, and a plurality of through holes 7 are formed by splicing between a plurality of rope bodies 61 and between a plurality of rope bodies 61 and the mounting ring 13. The size of the plurality of through holes 7 is away from the motor 2 (see Figure 2 ) direction, and the through hole 7 and the water outlet 121 (see Figure 2 In this embodiment, the rope body 61 and the mounting head 62 are both made of rubber.

[0045] See also Figure 2 and Figure 4A plurality of sliding grooves 131 are provided on the outer wall of the mounting ring 13 near the water inlet chamber 4. The number and position of the sliding grooves 131 correspond to the number and position of the mounting heads 62, and the sliding grooves 131 penetrate the mounting ring 13 in the direction close to the inner circle of the mounting ring 13. A plurality of mounting blocks 8 are slidingly connected to the mounting ring 13. The number and position of the mounting blocks 8 correspond to the number and position of the sliding grooves 131. The mounting blocks 8 are slidingly connected in the corresponding sliding grooves 131, and the mounting blocks 8 slide close to or away from the rope body 61. A clearance groove 91 is provided on the inner wall of the sliding groove 131. A limiting strip 9 is fixed on the outer wall of the mounting block 8. The limiting strip 9 is located in the clearance groove 91. When the mounting block 8 slides on the mounting ring 13, the limiting strip 9 abuts against the inner wall of the clearance groove 91, thereby limiting the mounting block 8 and reducing the situation where the mounting block 8 is separated from the sliding groove 131.

[0046] See also Figure 2 and Figure 4 Each mounting block 8 is provided with a mounting groove 81 and a connecting groove 82 on the outer side wall close to the water inlet chamber 4. The mounting groove 81 is for the corresponding mounting head 62 to be inserted into. The connecting groove 82 is connected to the mounting groove 81, and the connecting groove 82 is for the corresponding rope body 61 to be inserted into.

[0047] See also Figure 3 and Figure 4 A plurality of elastic members 10 are also fixed on the mounting ring 13, and the number and position of the elastic members 10 correspond to the number and position of the mounting blocks 8. The elastic members 10 are located on the side of the corresponding mounting block 8 away from the rope body 61 and are fixedly connected to the corresponding mounting block 8. The elastic members 10 tighten the mounting block 8, so that the mounting block 8 has a tendency to move away from the rope body 61. In this embodiment, the elastic members 10 are springs.

[0048] In actual use, the two mounting heads 62 on the rope body 61 are respectively inserted into the mounting grooves 81 on the corresponding mounting block 8, and the rope body 61 is inserted into the corresponding connecting groove 82. Then the mounting block 8 is loosened, and the elastic member 10 tightens the mounting block 8 and then tightens the rope body 61, so that the cutting rope 6 can be installed on the mounting ring 13. At this time, the mounting head 62 is pressed against the inner wall of the mounting groove 81 close to the connecting groove 82, thereby realizing the relative positioning between the mounting block 8 and the cutting rope 6.

[0049] See also Figure 2 and Figure 5A clamping block 14 is fixed on each mounting block 8, and the clamping block 14 includes a connecting portion 141 and a snap-in portion 142. The connecting portion 141 is located at the inner circle of the mounting ring 13, and the connecting portion 141 is located at a side of the mounting block 8 close to the extension portion 12 and is fixedly connected to the mounting block 8. The snap-in portion 142 is located at one end of the connecting portion 141 away from the mounting block 8 and at a side of the connecting portion 141 away from the rope body 61, and the snap-in portion 142 is fixedly connected to the connecting portion 141. A plurality of snap-in grooves 15 are provided on the inner wall of the water outlet 121, and the number and position of the snap-in grooves 15 correspond one-to-one to the number and position of the snap-in portions 142, and the snap-in grooves 15 are provided for the corresponding snap-in portions 142 to be snapped in.

[0050] In actual use, several mounting blocks 8 are moved toward the direction close to the rope body 61 so that the snap-in portions 142 and the extension portion 12 are staggered, and then the mounting ring 13 and the extension portion 12 are spliced ​​together so that the several snap-in portions 142 and the slots 15 are aligned one by one, and then the mounting blocks 8 are loosened, and the several snap-in portions 142 are snapped into the corresponding slots 15 under the action of the elastic member 10, and the mounting ring 13 can be installed on the extension portion 12 by the snap-in portions 142 abutting against the inner wall of the slot 15.

[0051] When removing the mounting ring 13 , the plurality of snap-in portions 142 are moved out of the snap-in slots 15 , and then the mounting ring 13 is moved away from the extending portion 12 , so that the mounting ring 13 can be removed.

[0052] See also Figure 2 and Figure 6 A slide groove 16 is provided on the inner wall of the water inlet chamber 4 , the length direction of the slide groove 16 is parallel to the rotation axis of the rotating seat 31 , a scraper block 17 is slidably connected in the slide groove 16 , and the sliding direction of the scraper block 17 is parallel to the length direction of the slide groove 16 .

[0053] See also Figure 6 and Figure 7 A movable groove 171 is provided on the outer wall of the scraper block 17 away from the bottom of the slide groove 16 , and limiting grooves 18 are provided on two opposite inner walls of the movable groove 171 distributed along the rotation axis of the rotating seat 31 .

[0054] See also Figure 2 and Figure 8, an elastic block 19 is slidably connected in the movable groove 171, and the elastic block 19 includes a sliding portion 191 and two limiting portions 192. The sliding portion 191 is slidably connected in the movable groove 171, and the sliding direction of the sliding portion 191 is perpendicular to the rotation axis of the rotating seat 31. The two limiting portions 192 are respectively located on opposite sides of the sliding portion 191 and are fixedly connected to the sliding portion 191. The two limiting portions 192 correspond to the two limiting grooves 18 one by one, and each limiting portion 192 is located in the corresponding limiting groove 18. When the sliding portion 191 slides, the limiting portion 192 is driven to be slidably connected in the corresponding limiting groove 18. In this embodiment, the material of the elastic block 19 is rubber.

[0055] See also Figure 2 and Figure 7 The scraper block 17 is fixed with an elastic member 3 20, which is located in the movable groove 171 and on the side of the sliding portion 191 along the rotation direction of the impeller 3, and the opposite ends of each elastic member 3 20 are respectively fixedly connected to the inner wall of the movable groove 171 and the sliding portion 191, and the opposite ends of each elastic member 3 20 are respectively pressed against the inner wall of the movable groove 171 and the sliding portion 191, so that the sliding portion 191 has a tendency to move in the opposite direction of the rotation direction of the impeller 3. In this embodiment, the elastic member 3 20 is a spring.

[0056] See also Figure 2 and Figure 7 A through groove 21 is provided on the outer wall of the sliding part 191 away from the scraper block 17. The through groove 21 penetrates the sliding part 191 in a direction perpendicular to the rotation axis of the rotating seat 31. The blade 32 is inserted into the through groove 21. A guide surface 1 211 and a guide surface 212 are formed on the inner wall of the through groove 21. The guide surface 1 211 and the guide surface 212 are respectively located on opposite sides of the through groove 21 along the rotation axis of the rotating seat 31, and the guide surface 1 211 is located on the side of the guide surface 212 close to the motor 2. The guide surface 1 211 and the guide surface 212 are both located at one end of the sliding part 191 away from the elastic member 3 20, and the guide surface 1 211 and the guide surface 212 are close to each other along the rotation direction of the rotating seat 31. When the blade 32 is located in the through groove 21, the blade 32 is pressed against the two opposite inner walls of the through groove 21 along the rotation axis of the impeller 3.

[0057] See also Figure 6 and Figure 7 Two scraping surfaces 22 are formed on the outer wall of the scraper block 17, and the two scraping surfaces 22 are respectively located on the opposite sides of the sliding portion 191 along the sliding direction of the scraper block 17. The distance between the two scraping surfaces 22 gradually increases toward the bottom of the slide groove 16, and the end of each scraping surface 22 away from the sliding portion 191 abuts against the inner wall of the bottom of the slide groove 16.

[0058] See also Figure 2 and Figure 6The pump body 1 is fixed with an elastic member 23, which is located in the chute 16 and on the side of the scraper block 17 away from the motor 2. The opposite ends of the elastic member 23 are respectively fixedly connected to the inner wall of the chute 16 and the scraper block 17, and the opposite ends of the elastic member 23 are respectively pressed against the inner wall of the chute 16 and the scraper block 17, so that the scraper block 17 has a tendency to approach the motor 2. In this embodiment, the elastic member 23 is a spring.

[0059] The implementation principle of a permanent magnet large flow submersible sewage pump in the embodiment of the present application is:

[0060] The operation of the motor 2 drives the impeller 3 to rotate, and the impeller 3 abuts against the inner wall of the water inlet chamber 4, thereby pushing the debris located in the water inlet chamber 4 near the motor 2, so that the above-mentioned debris is pushed out of the space on one side of the water inlet chamber 4 near the motor 2 along the inclination direction of the blade 32 as the blade 32 rotates, and in the continuous rotation of the blade 32, small-sized debris is pushed out from the water outlet 121 in order from large-sized debris through the through hole 7, thereby reducing the accumulation of debris in the space on one side of the water inlet chamber 4 near the motor 2, thereby reducing the situation where debris blocks the impeller 3 or the output shaft of the motor 2, making the rotation of the impeller 3 more stable, which is conducive to the stable operation of the submersible sewage pump.

[0061] During the rotation of the blade 32, the blade 32 is inserted into the through groove 21, and the friction resistance between the blade 32 and the inner wall of the through groove 21 drives the sliding part 191 to slide close to the elastic part 3 20, and drives the scraper block 17 to slide away from the motor 2. At the same time, the inner wall of the through groove 21 is pressed against the blade 32 to scrape off the debris remaining on the surface of the blade 32. After the blade 32 is scraped, the blade 32 is separated from the elastic block 19, and the sliding part 191 is reset under the action of the elastic part 3 20, and the scraper block 17 is reset under the action of the elastic part 23 to continue to scrape the next blade 32, thereby reducing the accumulation and adhesion of debris on the blade 32, thereby reducing the situation where the blade 32 is blocked by debris, which is conducive to improving the stability of the rotation of the blade 32. It should be pointed out that the distance between adjacent blades 32 is sufficient for the scraper block 17 to be reset under the action of the elastic part 23.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A permanent magnet large flow submersible sewage pump, comprising a pump body (1), a motor (2) arranged on the pump body (1) and an impeller (3) rotatably connected to the pump body (1), wherein the motor (2) drives the impeller (3) to rotate, the pump body (1) is provided with a water inlet (111) and a water outlet (121), the pump body (1) is provided with a water inlet chamber (4), the impeller (3) is located in the water inlet chamber (4), and the water inlet chamber (4) is connected to the water inlet (111) and the water outlet (121), characterized in that: The impeller (3) comprises a rotating seat (31) rotatably connected to the pump body (1) and blades (32) arranged on the rotating seat (31), the blades (32) being inclined in a direction close to the motor (2) along the rotation direction of the rotating seat (31), and the blades (32) abutting against the inner wall of the water inlet chamber (4); A scraper block (17) is slidably connected in the water inlet chamber (4), the sliding direction of the scraper block (17) is parallel to the rotation axis of the impeller (3), an elastic block (19) is provided on the scraper block (17), a through groove (21) is provided on the elastic block (19), the through groove (21) is for the blade (32) to be inserted, when the blade (32) is located in the through groove (21), the blade (32) is pressed against two opposite inner walls of the through groove (21), and the pump body (1) is also provided with a second elastic member (23), the second elastic member (23) is pressed against the scraper block (17), so that the scraper block (17) has a tendency to approach the motor (2); The elastic block (19) is slidably connected to the scraper block (17), the sliding direction of the elastic block (19) is perpendicular to the rotation axis of the impeller (3), and the scraper block (17) is provided with an elastic member three (20), and the elastic member three (20) is pressed against the elastic block (19), so that the elastic block (19) has a tendency to move in the opposite direction of the rotation direction of the impeller (3); During the rotation of the blade (32), the groove (21) scrapes off the debris on the surface of the blade (32).

2. The permanent magnet large flow submersible sewage pump according to claim 1 is characterized in that: A blade (5) is coaxially arranged on the rotating seat (31), and the blade (5) is located on a side of the water inlet (111) away from the impeller (3). A plurality of cutting ropes (6) are arranged on the pump body (1), and the cutting ropes (6) cross the water outlet (121). The plurality of cutting ropes (6) are distributed at intervals in the transverse and longitudinal directions, and the cutting ropes (6) are flush with the inner wall of the water inlet chamber (4).

3. The permanent magnet large flow submersible sewage pump according to claim 2 is characterized in that: A plurality of through holes (7) are formed by splicing between the plurality of cutting ropes (6) and between the cutting ropes and the pump body (1), and the sizes of the plurality of through holes (7) gradually increase in a direction away from the motor (2).

4. The permanent magnet large flow submersible sewage pump according to claim 3 is characterized in that: The cutting rope (6) is an elastic rope. A mounting block (8) is slidably connected to the pump body (1). The mounting block (8) is located at two opposite ends of the cutting rope (6). The mounting block (8) slides toward or away from the cutting rope (6). An elastic member (10) is also provided on the pump body (1). The elastic member (10) is connected to the mounting block (8) so that the mounting block (8) has a tendency to move away from the cutting rope (6).

5. The permanent magnet large flow submersible sewage pump according to claim 4 is characterized in that: The pump body (1) comprises a main body (11), an extension part (12) threadedly connected to the main body (11), and a mounting ring (13) detachably connected to the extension part (12); the mounting ring (13) is located on a side of the extension part (12) close to the main body (11); the water inlet (111) is provided on the main body (11); the water outlet (121) is provided on the extension part (12); the water inlet chamber (4) is formed by splicing the main body (11) and the extension part (12); the cutting rope (6), the mounting block (8) and the elastic member (10) are all provided on the mounting ring (13); The rope cutting device (6) comprises a rope body (61) and a mounting head (62) arranged on the rope body (61); the mounting head (62) is located at two opposite ends of the rope body (61); and the mounting block (8) is provided with a mounting groove (81) for the mounting head (62) to be inserted into and a connecting groove (82) for the rope body (61) to be inserted into.

6. The permanent magnet large flow submersible sewage pump according to claim 5 is characterized in that: A clamping block (14) is provided on the installation block (8), and a clamping groove (15) for the clamping block (14) to be clamped into is provided on the inner wall of the water outlet (121).

7. The permanent magnet large flow submersible sewage pump according to claim 1 is characterized in that: A first guide surface (211) and a second guide surface (212) are provided on the inner wall of the through groove (21); the first guide surface (211) and the second guide surface (212) are respectively located on opposite sides of the through groove (21) along the rotation axis of the impeller (3); and the first guide surface (211) and the second guide surface (212) are close to each other along the rotation direction of the impeller (3).

8. The permanent magnet large flow submersible sewage pump according to claim 1 is characterized in that: A slide groove (16) is provided on the inner wall of the water inlet chamber (4), the scraper block (17) is slidably connected in the slide groove (16), a scraper surface (22) is provided on the outer wall of the scraper block (17), the scraper surface (22) is located on two opposite sides of the elastic block (19) along the sliding direction of the scraper block (17), and the end of the scraper surface (22) away from the elastic block (19) abuts against the inner wall of the bottom of the slide groove (16).

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