Self-circulation cooling type shield pump

Abstract

The invention relates to a self-circulation cooling type shield pump which comprises a pump body and a cooling device, a liquid inlet cavity and a cooling cavity are formed in the pump body, a shielding cover is arranged in the pump body and communicates with the liquid inlet cavity and the cooling cavity, a hollow rotating shaft is rotationally connected to the interior of the shielding cover, and a plurality of impellers are arranged at the two ends of the hollow rotating shaft correspondingly; the cooling device is used for cooling the pump body and comprises a plurality of cooling pipes and a conveying assembly, the cooling pipes are evenly distributed along the outer surface of the pump body, two of the cooling pipes communicate with the liquid inlet cavity, and the conveying assembly is used for conveying liquid in the liquid inlet cavity into the cooling pipes. Liquid in the liquid inlet cavity is conveyed into the multiple cooling pipes through the conveying assembly, the cooling pipes can increase the heat dissipation area of the surface of the pump body, then the liquid flows through the cooling pipes to dissipate heat of the cooling pipes, and cooling and heat dissipation of the outer side of the pump body are enhanced; in the working process of the shield pump, heat dissipation can be conducted on the interior and the exterior of the shield pump, and the heat dissipation performance of the shield pump is improved.

Description

Technical Field

[0001] The invention relates to the technical field of shielded pumps, in particular to a self-circulating cooling shielded pump. Background Art

[0002] The ‌canned motor‌ pump is a sealless pump. Its working principle is to fix the rotor of the three-phase asynchronous canned motor and the impeller of the pump together through the same shaft, and then use a shield to shield the rotor. The stator of the canned pump is surrounded by the shield, which is made of metal. The power is transmitted to the rotor through the magnetic field, and the entire rotor runs in the pumped liquid, so as to achieve complete leakage-free.

[0003] However, the motor stator winding and the sliding bearing friction pair are shielded in the shielding cover, and the heat dissipation conditions are poor. In particular, the high-power and high-speed shielded pump generates a lot of heat, which can easily cause the motor winding to burn or the friction pair to wear. Summary of the invention

[0004] In order to increase the heat dissipation of the canned motor pump, the present application provides a self-circulating cooling canned motor pump.

[0005] The present application provides a self-circulating cooling canned motor pump adopts the following technical solution: A self-circulating cooling shielded pump comprises a pump body and a cooling device, wherein a liquid inlet cavity and a cooling cavity are formed in the pump body, a shielding cover is provided in the pump body, the shielding cover connects the liquid inlet cavity and the cooling cavity, a hollow rotating shaft is rotatably connected inside the shielding cover, a plurality of impellers are respectively provided at both ends of the hollow rotating shaft, the cooling device is used to cool the pump body, the cooling device comprises a plurality of cooling pipes and a conveying assembly, the plurality of cooling pipes are respectively evenly distributed along the outer surface of the pump body, wherein two of the cooling pipes are respectively connected to the liquid inlet cavity, and the conveying assembly is used to convey the liquid in the liquid inlet cavity to the plurality of cooling pipes.

[0006] By adopting the above technical scheme, when the impeller in the cooling chamber rotates, it drives the liquid to flow from the liquid inlet chamber through the shielding cover to the cooling chamber, cools the inner side of the pump body, and transports the liquid in the liquid inlet chamber to multiple cooling pipes through the conveying component. The cooling pipes themselves can increase the heat dissipation area of ​​the pump body surface, and then the liquid flows through the cooling pipes to dissipate the heat of the cooling pipes, thereby enhancing the cooling and heat dissipation of the outer side of the pump body; during the operation of the shielded pump, the shielded pump can dissipate the heat inside and outside of itself respectively, thereby increasing the heat dissipation performance of the shielded pump.

[0007] Preferably, the conveying assembly includes multiple hoses and multiple rollers, one end of the multiple hoses in the axial direction are respectively fixedly connected to multiple cooling pipes, the other end of the multiple hoses in the axial direction are respectively fixedly connected to adjacent cooling pipes, the multiple rollers are respectively slidably connected to the pump body, and the multiple hoses are respectively located on the active paths of the multiple rollers. When the rollers slide onto the hoses, the hoses are squeezed and deformed.

[0008] By adopting the above technical scheme, the hose is squeezed by the sliding of the roller, so that the liquid in the hose is squeezed into the cooling pipe in the rolling direction of the roller. After the liquid in the hose is discharged, a local vacuum is generated, and the liquid on the other side is sucked into the hose. By orderly pressing multiple hoses, the liquid in the multiple hoses can circulate, the outer surface of the pump body is cooled and dissipated, and the heat dissipation of the shielded pump is increased.

[0009] Preferably, the multiple hoses are respectively located in the liquid inlet chamber and the cooling chamber, and the multiple hoses are evenly distributed around the circumferential side of the hollow rotating shaft, a plurality of connecting rods are provided on the hollow rotating shaft, the multiple connecting rods respectively correspond to a plurality of rollers, the multiple connecting rods are respectively arranged on the hollow rotating shaft, the multiple rollers are respectively rotatably connected to the connecting rods, and the multiple connecting rods in the liquid inlet chamber and the multiple connecting rods in the cooling chamber are staggered.

[0010] By adopting the above technical scheme, a connecting rod is arranged on the hollow shaft, and the roller is rotatably connected to the connecting rod, so that when the hollow shaft of the shielded pump moves, it drives the roller to squeeze the hose, that is, the faster the rotation speed of the hollow shaft is, the faster the flow rate of the liquid in the hose and the cooling pipe is; multiple hoses are respectively located in the liquid inlet cavity and the cooling cavity, and the liquid in the hose can be dissipated by the liquid in the liquid inlet cavity and the heat dissipation cavity, reducing the possibility of heat generation of the liquid flowing into the cooling pipe, thereby improving the heat dissipation of the shielded pump; and the connecting rod in the liquid inlet cavity and the connecting rod in the cooling cavity are staggered, so that the hoses at both ends of the cooling pipe are respectively pressurized, so that the flow of the liquid is smoother; the roller is rotatably connected to the connecting rod, and when the roller squeezes the hose, the friction between the roller and the hose causes the roller to rotate, thereby reducing the possibility of damage between the roller and the hose due to friction.

[0011] Preferably, a plurality of abutment blocks that can cooperate with the hoses are respectively provided in the liquid inlet cavity and the cooling cavity, and the plurality of abutment blocks correspond to a plurality of hoses respectively, and the outer surfaces of the plurality of hoses abut against the corresponding abutment blocks respectively.

[0012] By adopting the above technical solution, the setting of the abutment block plays a limiting role on one side of the inner ring of the hose, so that the deformation degree of the inner ring of the hose is reduced when the hose is squeezed, thereby reducing the possibility of failure to generate a local vacuum in the hose due to the outer ring and the inner ring of the hose deforming together when the roller squeezes the hose; at the same time, it plays a limiting role on the position of the hose in the cooling chamber or the water passage chamber, reducing the possibility of deviation of the axial position of the hose.

[0013] Preferably, it also includes a scraping assembly, which is used for scraping inside the cooling tube. The scraping assembly includes a plurality of scraping rings, a sliding rod and a driving member. The sliding rod is slidably connected in the cooling tube along the length direction of the cooling tube, and the plurality of scraping rings are respectively arranged on the sliding rod. The driving member is used to drive the sliding of the sliding rod.

[0014] By adopting the above technical solution, the sliding rod is driven to slide by the driving member, so that the scraper ring scrapes the inner wall of the cooling pipe and carries the liquid out of the cooling pipe through the flow, thereby reducing the possibility of scale accumulation on the inner wall of the cooling pipe. At the same time, the scraper ring plays a heat conduction role between the inner walls on both sides of the cooling pipe, thereby increasing the heat dissipation of the outer wall of the pump body.

[0015] Preferably, the driving member includes two articulated rods and two arc blocks, the two arc blocks are respectively fixedly connected to the hoses on both sides of the cooling pipe, the two articulated rods correspond to the two arc blocks respectively, and the two ends of the two articulated rods in the length direction are respectively articulated connected to the sliding rod and the arc block.

[0016] By adopting the above technical solution, when the roller squeezes the hose to deform the hose, the arc tube on the hose is displaced, thereby driving the hinged rod to move, causing the sliding rod to move toward the other side. The movement of the sliding rod causes the hinged rod and the arc tube on the other side to be displaced, thereby causing the hose on the other side to rebound; that is, the compression deformation of the hose causes the sliding rod to move to scrape off the scale on the inner wall of the cooling pipe, and at the same time, the hose on the other side of the cooling pipe rebounds and recovers, thereby reducing the possibility of slow rebound or no rebound of the hose, thereby reducing the possibility of slow flow rate or no flow of water in the cooling pipe.

[0017] Preferably, filter screens are respectively provided at both ends of the shielding cover, and scraping blocks are respectively provided on the plurality of connecting rods, and the plurality of scraping blocks are respectively abutted against the filter screens on both sides.

[0018] By adopting the above technical solution, the setting of the filter can reduce the possibility of impurities entering the shielding cover and causing damage to the shielding cover and the hollow rotating shaft, and the scraper block can clean the surface of the filter through the rotation of the connecting rod, thereby reducing the accumulation of impurities on the surface of the filter and the possibility of liquid being unable to flow into the shielding cover.

[0019] Preferably, a partition is provided in the liquid inlet chamber, the hollow rotating shaft passes through and is rotatably connected to the partition, and a liquid flow gap is provided between the partition and the liquid inlet chamber.

[0020] By adopting the above technical solution, a partition is set to position the hollow shaft in the liquid inlet chamber, thereby reducing the possibility of eccentricity of the hollow shaft, and filtering the liquid flowing to the other side of the partition through the liquid flow gap between the partition and the liquid inlet chamber, thereby reducing the possibility of large particles entering the active path of the roller, thereby reducing the possibility of wear on the roller and the hose.

[0021] The technical effects of the present invention are mainly reflected in the following aspects: 1. The present invention provides a hose and a roller, and the hose is squeezed by the sliding of the roller, so that the liquid in the hose is squeezed into the cooling pipe in the rolling direction of the roller. After the liquid in the hose is discharged, a local vacuum is generated, and the liquid on the other side is sucked into the hose. By sequentially pressing multiple hoses, the liquid in the multiple hoses is circulated, the outer surface of the pump body is cooled and the heat dissipation is increased. 2. The present invention arranges a connecting rod, arranges a connecting rod on a hollow shaft, and makes a roller rotatably connected to the connecting rod, so that when the hollow shaft of the shielded pump moves, it drives the roller to squeeze the hose, that is, the faster the rotation speed of the hollow shaft is, the faster the flow rate of the liquid in the hose and the cooling pipe is; multiple hoses are respectively located in the liquid inlet cavity and the cooling cavity, and the liquid in the hose can be radiated by the liquid in the liquid inlet cavity and the heat dissipation cavity, reducing the possibility of the liquid flowing into the cooling pipe heating up, thereby improving the heat dissipation of the shielded pump; and the connecting rod in the liquid inlet cavity and the connecting rod in the cooling cavity are staggered, so that the hoses at both ends of the cooling pipe are respectively pressurized, so that the flow of the liquid is smoother; 3. The present invention sets a driving member. When the roller squeezes the hose to deform the hose, the arc tube on the hose is displaced, thereby driving the hinged rod to move, causing the sliding rod to move toward the other side. The movement of the sliding rod causes the hinged rod and the arc tube on the other side to be displaced, thereby causing the hose on the other side to rebound. That is, the compression deformation of the hose causes the sliding rod to move to scrape off the scale on the inner wall of the cooling pipe, and at the same time, the hose on the other side of the cooling pipe rebounds and recovers, thereby reducing the possibility of the hose rebounding slowly or not rebounding, thereby reducing the possibility of slow flow rate or no flow of water in the cooling pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0023] Figure 2 It is a schematic diagram of the pump body structure of an embodiment of the present application.

[0024] Figure 3 is along Figure 2Enlarged view of point A in the middle.

[0025] Figure 4 It is a schematic diagram of the structure of the liquid inlet chamber of an embodiment of the present application.

[0026] Figure 5 It is a schematic diagram of the cooling chamber structure of an embodiment of the present application.

[0027] Figure 6 is along Figure 5 Enlarged view of point B in the middle.

[0028] Figure 7 It is a schematic diagram of the structure of the cooling device of an embodiment of the present application.

[0029] Figure 8 It is a schematic diagram of the cooling tube structure of an embodiment of the present application.

[0030] Fig. 9 It is a schematic diagram of the structure of the wiper assembly according to an embodiment of the present application.

[0031] Fig.10 is along Fig. 9 Enlarged view of point C in the middle.

[0032] Explanation of the reference numerals: 1. Pump body; 11. Liquid inlet chamber; 111. Partition; 112. Liquid flow gap; 12. Cooling chamber; 13. Stator; 14. Hollow rotating shaft; 141. Water inlet hole; 15. Shielding cover; 151. Filter screen; 16. Impeller; 2. Cooling device; 21. Cooling pipe; 22. Conveying assembly; 221. Hose; 222. Roller; 223. Connecting rod; 23. Abutment block; 24. Wiping assembly; 241. Scraping ring; 242. Sliding rod; 25. Driving member; 251. Articulated rod; 252. Arc block. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-Figure 10 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0034] The embodiment of the present application discloses a self-circulating cooling canned motor pump.

[0035] Reference Figure 1 and Figure 2A self-circulating cooling shielded pump of the present embodiment includes a pump body 1 and a cooling device 2. A liquid inlet chamber 11 and a cooling chamber 12 are provided in the pump body 1. A stator 13 is fixedly connected to the pump body 1. A shielding cover 15 is fixedly connected to the pump body 1. The two ends of the shielding cover 15 in the axial direction are respectively connected to the liquid inlet chamber 11 and the cooling chamber 12. The stator 13 is located on the outside of the shielding cover 15. A hollow shaft 14 is coaxially and rotatably connected to the shielding cover 15. Impellers 16 are coaxially and fixedly connected to the two ends of the hollow shaft 14. A water inlet hole 141 is provided on the hollow shaft 14. The water inlet hole 141 is connected to the cooling chamber 12 through the hollow shaft 14.

[0036] Reference Figure 1 and Figure 4 The cooling device 2 is used to cool the pump body 1. The cooling device 2 includes a plurality of cooling tubes 21 and a conveying assembly 22. The plurality of cooling tubes 21 are evenly distributed along the outer surface of the pump body 1, wherein two cooling tubes 21 are respectively connected to the liquid inlet cavity 11, and the conveying assembly 22 is used to convey the liquid in the liquid inlet cavity 11 to the plurality of cooling tubes 21. The conveying assembly 22 includes a plurality of hoses 221 and a plurality of rollers 222. One end of the plurality of hoses 221 in the axial direction is respectively fixedly connected to the plurality of cooling tubes 21, and the other end of the plurality of hoses 221 in the axial direction is respectively fixedly connected to the adjacent cooling tubes 21, and the two hoses 221 at both ends of the cooling tube 21 are respectively connected to different cooling tubes 21 on the adjacent two sides; the plurality of hoses 221 are respectively located in the liquid inlet cavity 11 and the cooling cavity 12, and the plurality of hoses 221 are evenly distributed around the circumferential side of the hollow rotating shaft 14.

[0037] Reference Figure 2 and Figure 4 , multiple rollers 222 are respectively connected to the pump body 1 by sliding around the circumferential side of the hollow shaft 14, and multiple connecting rods 223 are respectively fixedly connected to the circumferential side of the hollow shaft 14, and the multiple connecting rods 223 correspond to the multiple rollers 222 respectively, and the multiple rollers 222 are respectively connected to the corresponding connecting rods 223 by rotating along the axial direction of the hollow shaft 14, and the multiple connecting rods 223 located in the liquid inlet cavity 11 and the multiple connecting rods 223 located in the cooling cavity 12 are arranged alternately. Multiple hoses 221 are respectively located on the active path of the rollers 222. When the rollers 222 slide onto the hoses 221, the hoses 221 are squeezed and deformed, and when the rollers 222 slide out of the range of the hoses 221, the hoses 221 rebound and recover.

[0038] Reference Figure 2 and Figure 5When the impeller 16 in the cooling chamber 12 rotates, the liquid is driven to flow from the liquid inlet chamber 11 through the shielding cover 15 and the liquid inlet hole into the cooling chamber 12, and the inner side of the pump body 1 and the hollow shaft 14 are cooled and dissipated. The liquid in the liquid inlet chamber 11 is transported to the plurality of cooling tubes 21 through the conveying assembly 22. The cooling tubes 21 themselves can increase the heat dissipation area of ​​the surface of the pump body 1, and then the liquid flows through the cooling tubes 21 to dissipate the heat of the cooling tubes 21, thereby enhancing the cooling and heat dissipation of the outer side of the pump body 1. The shielded pump can dissipate the heat inside and outside of itself separately during operation, thereby increasing the heat dissipation performance of the shielded pump.

[0039] Reference Figure 2 , Figure 3 and Figure 7 By arranging a connecting rod 223 on the hollow shaft 14 and making the roller 222 rotatably connected to the connecting rod 223, the hollow shaft 14 of the shielded pump drives the roller 222 to slide around the central axis of the hollow shaft 14 when it moves, and squeezes the hose 221, so that the liquid in the hose 221 is squeezed into the cooling pipe 21 in the rolling direction of the roller 222. After the liquid in the hose 221 is discharged, a local vacuum is generated, and the liquid on the other side is sucked into the hose 221. By orderly pressing multiple hoses 221, the liquid in the multiple hoses 221 is circulated, the outer surface of the pump body 1 is cooled and dissipated, and the heat dissipation of the shielded pump is increased; the multiple hoses 221 are respectively located in the liquid inlet cavity 11 and the cooling cavity 12, which can be passed through The liquid in the hose 221 is cooled by the liquid in the liquid inlet chamber 11 and the heat dissipation chamber, reducing the possibility of the liquid flowing into the cooling tube 21 heating up, thereby improving the heat dissipation of the shielded pump; when the rotation speed of the hollow shaft 14 is faster, the flow rate of the liquid in the hose 221 and the cooling tube 21 is also faster; and the connecting rod 223 in the liquid inlet chamber 11 and the connecting rod 223 in the cooling chamber 12 are staggered, so that the hoses 221 at both ends of the cooling tube 21 are respectively pressurized, so that the flow of liquid is smoother; the roller 222 is rotatably connected to the connecting rod 223, and when the roller 222 squeezes the hose 221, the friction between the roller 222 and the hose 221 causes the roller 222 to rotate, reducing the possibility of damage between the roller 222 and the hose 221 due to friction.

[0040] Reference Figure 4 and Figure 6, a plurality of abutment blocks 23 that can cooperate with the hose 221 are fixedly connected in the liquid inlet chamber 11 and the cooling chamber 12, and the plurality of abutment blocks 23 are respectively provided with anti-skid patterns, and the plurality of abutment blocks 23 correspond to the plurality of hoses 221, and the outer surfaces of the plurality of hoses 221 abut against the corresponding abutment blocks 23. The setting of the abutment blocks 23 plays a limiting role on one side of the inner ring of the hose 221, so that the deformation degree of one side of the inner ring of the hose 221 is reduced when the hose 221 is squeezed, thereby reducing the possibility that the outer ring of the hose 221 and the inner ring of the hose 221 are deformed together when the roller 222 squeezes the hose 221, resulting in the failure to generate a local vacuum in the hose 221; at the same time, it plays a limiting role on the position of the hose 221 in the cooling chamber 12 or the water passage chamber, reducing the possibility of the axis position of the hose 221 being offset.

[0041] Reference Figure 8-Figure 10 , and also includes a scraping assembly 24, which is used for scraping inside the cooling tube 21. The scraping assembly 24 includes a plurality of scraping rings 241, a sliding rod 242 and a driving member 25. The sliding rod 242 is slidably connected to the cooling tube 21 along the length direction of the cooling tube 21, and a plurality of scraping rings 241 are respectively fixedly connected to the sliding rod 242, and the plurality of scraping rings 241 are respectively evenly distributed along the length direction of the sliding rod 242. The driving member 25 drives the sliding of the sliding rod 242, so that the scraping ring 241 scrapes the inner wall of the cooling tube 21, and brings the liquid out of the cooling tube 21 through the flow, thereby reducing the possibility of scale accumulation on the inner wall of the cooling tube 21. At the same time, the scraping ring 241 plays a heat conduction role between the inner walls on both sides of the cooling tube 21, thereby increasing the heat dissipation of the outer wall of the pump body 1.

[0042] Reference Figure 8-Figure 10 The driving member 25 includes two hinged rods 251 and two arc blocks 252. The two arc blocks 252 are respectively fixedly connected to the hoses 221 on both sides of the cooling pipe 21. The two hinged rods 251 correspond to the two arc blocks 252 respectively. The two ends of the two hinged rods 251 in the length direction are respectively hingedly connected to the sliding rod 242 and the arc blocks 252. When the roller 222 squeezes the hose 221 to deform the hose 221, the arc tube on the hose 221 is displaced, thereby driving the hinged rod 251 to move, and the sliding rod 242 moves to the other side. When the sliding rod 242 moves, the hinged rod 251 and the arc tube on the other side are displaced, so that the hose 221 on the other side rebounds; that is, the compression deformation of the hose 221 causes the sliding rod 242 to move to scrape off the scale on the inner wall of the cooling pipe 21, and at the same time, the hose 221 on the other side of the cooling pipe 21 rebounds and recovers, thereby reducing the possibility of the hose 221 rebounding slowly or not rebounding, thereby reducing the possibility of the water flow in the cooling pipe 21 being slow or not flowing.

[0043] Reference Figure 2 and Figure 5, the two ends of the shielding cover 15 are respectively fixedly connected with the filter screen 151, and the multiple connecting rods 223 are respectively fixedly connected with the scraping blocks, and the multiple scraping blocks are respectively abutted on the filter screens 151 on both sides. The setting of the filter screen 151 can reduce the possibility of impurities entering the shielding cover 15 and causing damage to the shielding cover 15 and the hollow shaft 14, and the scraping blocks can clean the surface of the filter screen 151 through the rotation of the connecting rod 223, reducing the possibility of impurities accumulating on the surface of the filter screen 151 and preventing the liquid from flowing into the shielding cover 15.

[0044] Reference Figure 3 and Figure 6 A partition 111 is fixedly connected in the liquid inlet chamber 11, and a hollow shaft 14 is passed through and rotatably connected to the partition 111. A liquid flow gap 112 is opened between the partition 111 and the liquid inlet chamber 11. By setting the partition 111, the position of the hollow shaft 14 in the liquid inlet chamber 11 is positioned, reducing the possibility of eccentricity of the hollow shaft 14, and through the liquid flow gap 112 between the partition 111 and the liquid inlet chamber 11, the liquid flowing to the other side of the partition 111 is filtered once, reducing the possibility of large particles entering the activity path of the roller 222, thereby reducing the possibility of wear on the roller 222 and the hose 221.

[0045] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A self-circulating cooling canned motor pump, characterized in that: The invention comprises a pump body (1) and a cooling device (2), wherein a liquid inlet cavity (11) and a cooling cavity (12) are provided in the pump body (1), a shielding cover (15) is provided in the pump body (1), the shielding cover (15) is connected to the liquid inlet cavity (11) and the cooling cavity (12), a hollow rotating shaft (14) is rotatably connected in the shielding cover (15), and a plurality of impellers (16) are respectively provided at both ends of the hollow rotating shaft (14), the cooling device (2) is used for cooling the pump body (1), the cooling device (2) comprises a plurality of cooling pipes (21) and a conveying assembly (22), the plurality of cooling pipes (21) are respectively evenly distributed along the outer surface of the pump body (1), wherein two of the cooling pipes (21) are respectively connected to the liquid inlet cavity (11), and the conveying assembly (22) is used for conveying the liquid in the liquid inlet cavity (11) to the plurality of cooling pipes (21).

2. A self-circulating cooling canned motor pump according to claim 1, characterized in that: The conveying assembly (22) comprises a plurality of hoses (221) and a plurality of rollers (222); one end of the plurality of hoses (221) in the axial direction is respectively fixedly connected to a plurality of cooling pipes (21); the other end of the plurality of hoses (221) in the axial direction is respectively fixedly connected to adjacent cooling pipes (21); the plurality of rollers (222) are respectively slidably connected to the pump body (1); the plurality of hoses (221) are respectively located on the movable paths of the plurality of rollers (222); when the rollers (222) slide onto the hoses (221), the hoses (221) are squeezed and deformed.

3. A self-circulating cooling canned motor pump according to claim 2, characterized in that: The plurality of hoses (221) are respectively located in the liquid inlet chamber (11) and the cooling chamber (12), and the plurality of hoses (221) are respectively evenly distributed around the circumferential side of the hollow rotating shaft (14); a plurality of connecting rods (223) are provided on the hollow rotating shaft (14); the plurality of connecting rods (223) respectively correspond to a plurality of rollers (222); the plurality of connecting rods (223) are respectively arranged on the hollow rotating shaft (14); the plurality of rollers (222) are respectively rotatably connected to the connecting rods (223); and the plurality of connecting rods (223) located in the liquid inlet chamber (11) and the plurality of connecting rods (223) located in the cooling chamber (12) are arranged alternately.

4. A self-circulating cooling canned motor pump according to claim 3, characterized in that: A plurality of abutment blocks (23) that can cooperate with the hose (221) are respectively arranged in the liquid inlet chamber (11) and the cooling chamber (12); the plurality of abutment blocks (23) respectively correspond to the plurality of hoses (221); and the outer surfaces of the plurality of hoses (221) respectively abut against the corresponding abutment blocks (23).

5. The self-circulating cooling canned motor pump according to claim 2, characterized in that: The invention also comprises a scraping assembly (24), wherein the scraping assembly (24) is used for scraping inside the cooling tube (21), and the scraping assembly (24) comprises a plurality of scraping rings (241), a sliding rod (242) and a driving member (25), wherein the sliding rod (242) is slidably connected inside the cooling tube (21) along the length direction of the cooling tube (21), the plurality of scraping rings (241) are respectively arranged on the sliding rod (242), and the driving member (25) is used for driving the sliding rod (242) to slide.

6. A self-circulating cooling canned motor pump according to claim 5, characterized in that: The driving member (25) comprises two hinged rods (251) and two arc blocks (252); the two arc blocks (252) are respectively fixedly connected to the hoses (221) on both sides of the cooling pipe (21); the two hinged rods (251) correspond to the two arc blocks (252) respectively; and the two ends of the two hinged rods (251) in the length direction are respectively hingedly connected to the sliding rod (242) and the arc blocks (252).

7. The self-circulating cooling canned motor pump according to claim 3, characterized in that: Filters (151) are respectively provided at both ends of the shielding cover (15), and scraping blocks are respectively provided on the plurality of connecting rods (223), and the plurality of scraping blocks are respectively abutted against the filters (151) on both sides.

8. The self-circulating cooling canned motor pump according to claim 7, characterized in that: A partition plate (111) is provided in the liquid inlet chamber (11), the hollow rotating shaft (14) is passed through and rotatably connected to the partition plate (111), and a liquid flow gap (112) is provided between the partition plate (111) and the liquid inlet chamber (11).

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