Shield pump with heat dissipation acceleration function

Abstract

The invention relates to the field of shield pumps, in particular to a shield pump with an accelerated heat dissipation function, which comprises a pump body and a driving mechanism, the driving mechanism is fixedly connected with the pump body; the driving mechanism comprises a rotor assembly, a stator assembly and a shell assembly which are sequentially arranged from inside to outside; the driving mechanism further comprises a sealing cover and a shielding sleeve, the sealing cover is arranged between the pump body and the stator assembly, and the sealing cover is further provided with a plurality of through holes; the shielding sleeve is arranged between the rotor assembly and the stator assembly, forms a sealed cavity together with the sealing cover and the shell assembly, and is used for placing the stator assembly; the head end of the rotating shaft penetrates through the middle of the sealing cover and is fixedly connected with an impeller arranged in the pump body so as to drive the impeller to rotate; the impeller drives fluid to enter the rotor assembly through the gap between the rotating shaft and the sealing cover and the through hole, flow to the tail end of the rotating shaft through the gap between the rotor assembly and the shielding sleeve, and finally flow to the head end from the tail end, so that an inner circulation channel for fluid flowing is formed.

Description

Technical Field

[0001] The invention relates to the field of shielded pumps, in particular to a shielded pump with a function of accelerating heat dissipation. Background Art

[0002] CN202421243022.6 discloses a shielded pump internal circulation regulating mechanism and a shielded pump; comprising a telescopic component, arranged at the first end of an axial through hole opened in the center of the impeller shaft, wherein the first end of the axial through hole is the end away from the inlet of the shielded pump; a control component, connected to the telescopic component, configured to control the telescopic movement of the telescopic component to adjust the distance between the first end of the axial through hole and the telescopic component.

[0003] The above device can reduce the internal circulation volume of the shielded pump under low flow conditions through the telescopic component, thereby improving the efficiency of the water pump; however, when working under high flow conditions, the internal circulation volume cannot be further increased. If it works for a long time, heat will continue to accumulate, causing the motor to be overloaded and malfunction. Moreover, under high flow conditions, since the fluid is in a relatively static state, the heat outside the motor accumulates too quickly, making it impossible for the fluid outside the motor to be absorbed in time, which will also cause the motor to be overloaded. For this reason, the present invention provides a shielded pump with accelerated heat dissipation function. Summary of the invention

[0004] The object of the present invention is to provide a canned pump with the function of accelerating heat dissipation, so as to solve the problem of untimely heat dissipation under large flow conditions proposed in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A shielded pump with a heat dissipation acceleration function comprises a pump body and a driving mechanism; the driving mechanism is fixedly connected to the pump body; the driving mechanism comprises a rotor assembly, a stator assembly and a housing assembly which are sequentially arranged from the inside to the outside; The driving mechanism also includes a sealing cover and a shielding sleeve. The sealing cover is arranged between the pump body and the stator assembly, and the sealing cover is also provided with a plurality of through holes. The shielding sleeve is arranged between the rotor assembly and the stator assembly, and together with the sealing cover and the housing assembly, forms a sealed cavity for placing the stator assembly. A hollow rotating shaft is fixedly connected to the middle of the rotor assembly, and the head end of the rotating shaft passes through the middle of the sealing cover and is fixedly connected to the impeller provided in the pump body to drive the impeller to rotate. The impeller drives the fluid to enter the rotor assembly through the gap between the shaft and the sealing cover and the through hole, flows to the tail end of the shaft through the gap between the rotor assembly and the shielding sleeve, and finally flows from the tail end to the head end, thereby forming an internal circulation channel for fluid flow.

[0006] Preferably, a cooling device is also provided at the end of the shell assembly away from the pump body; the cooling device includes a heat sink assembly and a circulation pipe; the heat sink assembly is attached to the outer wall of the shell assembly and is connected to the liquid inlet of the pump body; the two ends of the circulation pipe are respectively connected to the tail end of the rotating shaft and the liquid outlet of the pump body.

[0007] Preferably, the heat sink assembly includes two groups of heat sinks, a pair of liquid collecting pipes and a pair of connecting pipes; the heat sinks are sealingly connected to the outer wall of the shell assembly and form a heat dissipation channel with the shell assembly; one end of each group of heat sinks is sealingly connected to the corresponding liquid collecting pipe, and the other end is sealingly connected to the connecting pipe, and the heat dissipation channel further passes through the connecting pipe; the lower part of the liquid collecting pipe is connected to an infusion pipe connected to the liquid inlet of the pump body.

[0008] Preferably, the circulation pipeline includes a main circulation pipe, an accelerating tube and a sealing pipe fitting; the two ends of the main circulation pipe are fixedly connected to the liquid outlet of the pump body and the accelerating tube respectively; the accelerating tube is fixedly connected to the tail end of the rotating shaft; the sealing pipe fitting is sealed on the outside of the accelerating tube and the main circulation pipe; and a support frame is also arranged under the sealing pipe fitting.

[0009] Preferably, the accelerating tube is a Venturi tube, so that a liquid collecting chamber is formed between the accelerating tube and the sealing pipe; the liquid collecting chamber is connected to the gap between the rotor assembly and the shielding sleeve; a liquid inlet hole is opened in the tightening section in the middle of the accelerating tube for sucking the fluid in the liquid collecting chamber.

[0010] Preferably, the cooling device further includes a heat sink; the circulation pipeline further includes a flexible telescopic tube with telescopic capability, and both ends of the telescopic tube are respectively fixedly connected to the heat sink and the main circulation pipe.

[0011] Preferably, the heat sink includes a flow ring, a diverter pipe and a support rod; the flow ring is slidably connected to the upper surface of the support frame; the support rod is fixedly connected to the bottom of the inner wall of the flow ring; the diverter pipe is arranged inside the flow ring and connected to the flow ring.

[0012] Preferably, a pair of liquid storage cavities are symmetrically opened inside the flow ring along the support rod, and multiple plugs are fixedly connected to the side of the flow ring close to the joint pipe; the plugs are hollow inside and connected to the liquid storage cavities; the plugs are used to seal and plug into the heat dissipation channel in the joint pipe.

[0013] Preferably, the flow diversion pipe comprises a flow diversion pipe, two pairs of spoiler pipes and a flow diversion ring; the flow diversion ring is slidably connected to the outer wall of the sealing pipe; the two ends of the support rod are respectively fixedly connected to the flow diversion ring and the flow ring; the two ends of the flow diversion pipe are respectively fixedly connected to the flow diversion ring and the telescopic pipe; the flow diversion pipe and the flow diversion ring are hollowed out and communicated; the two pairs of spoiler pipes are symmetrically distributed along the support rod Preferably, the two ends of the spoiler tube are fixedly connected to the diverter ring and the flow ring, respectively, and are communicated with the hollow inside the diverter ring and the liquid storage cavity inside the flow ring, respectively, for conveying fluid; the spoiler tube is a Venturi tube, and the tightening section in the middle of the spoiler tube is provided with an air inlet facing the joint tube.

[0014] Compared with the prior art, the beneficial effect of the present invention is that the present application increases the supply amount of fluid during internal circulation by arranging through holes on the sealing cover, thereby achieving rapid heat dissipation.

[0015] By setting up a circulation pipeline, the speed of the fluid entering the shaft is increased by using an acceleration pipeline, and the flow speed of the fluid in the rotor assembly is also accelerated, so that the heat dissipation efficiency of the rotor assembly is further improved; it can also prevent tiny impurity particles from being deposited in the gap between the rotor assembly, especially the rotor assembly and the shielding sleeve, to affect the flow speed and ensure the heat dissipation effect. The fluid brought in by the main circulation pipe increases the fluid in the shaft, thereby taking away more heat and accelerating the cooling.

[0016] By setting up a heat sink assembly, the outer wall of the shell assembly can dissipate heat; by utilizing the suction force of the pump body's liquid inlet, the fluid outside the shell is always in a flowing state, allowing the fluid to better absorb the heat at the shell assembly, and achieve internal and external cooling together with the circulating pipe, ensuring that the drive mechanism can work stably for a long time.

[0017] By providing a heat sink, the environmental application range of the present application is increased. Not only can it work in a liquid, but it can also work outside a liquid without relying on an external cooling device. Through the fluid channel composed of a diverter ring, a spoiler tube, a liquid storage cavity, a plug, a heat dissipation channel, and an infusion tube, the fluid is used to cool the shell assembly. At the same time, the gas at the end of the drive structure can be sucked in through the air inlet of the spoiler tube, so that the gas at the end of the drive mechanism is in a flowing state, thereby achieving double cooling of the shell assembly and ensuring the stable operation of the drive mechanism under large flow conditions.

[0018] By setting up a separation device, the heat sink and the joint pipe can be separated more stably, avoiding damage to related pipelines at the sealing pipe fittings and reducing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a cross-sectional view of the internal structure of the driving structure of the present invention; Figure 3 A schematic diagram of the sealing cover structure of the present invention; Figure 4 It is a structural schematic diagram of the cooling device of the present invention; Figure 5 This is a structural disassembly diagram of the heat sink assembly of the present invention; Figure 6 A schematic diagram of the structure of the connection between the circulation pipeline and the separation device of the present invention; Figure 7 This is a cross-sectional view of the accelerating tube of the present invention (the arrow indicates the flow direction of the fluid); Figure 8 This is a schematic diagram of the structure of the heat sink of the present invention; Fig. 9 A cross-sectional view of the heat sink structure of the present invention; Fig.10 This is a structural schematic diagram of the heat sink and the joint pipe when connected.

[0020] In the figure: 1 pump body, 11 impeller, 2 driving mechanism, 21 rotor assembly, 22 stator assembly, 23 housing assembly, 24 sealing cover, 241 through hole, 25 shielding sleeve, 26 rotating shaft, 3 cooling device, 31 heat sink assembly, 311 heat sink, 312 liquid collecting pipe, 313 joint pipe, 314 liquid infusion pipe, 32 heat sink, 321 flow ring, 3211 liquid storage chamber, 3212 plug, 322 shunt pipe fitting, 323 support rod, 33 circulation pipe, 331 main circulation pipe, 332 acceleration tube, 3321 liquid inlet, 333 sealing pipe fitting, 3331 covering tube, 3332 sealing tube, 334 liquid collecting chamber, 335 telescopic tube, 4 support frame, 41 support plate, 521 diverter pipe, 522 spoiler pipe, 5221 air inlet, 523 diverter ring, 5231 diverter plate, 6 separation device, 61 separation plate, 62 rotating plate, 63 separation rod, 631 abutment plate. DETAILED DESCRIPTION

[0021] Embodiment 1:

[0022] See also Figure 1-Figure 7 The present invention provides a technical solution: Figure 1-3 As shown, a shielded pump with accelerated heat dissipation function includes a pump body 1 and a driving mechanism 2, and the driving mechanism 2 is fixedly connected to the pump body 1. The driving mechanism 2 includes a rotor assembly 21, a stator assembly 22 and a housing assembly 23 arranged in sequence from the inside to the outside; the driving mechanism 2 also includes a sealing cover 24 and a shielding sleeve 25, and the sealing cover 24 is arranged between the pump body 1 and the stator assembly 22. The shielding sleeve 25 is placed between the rotor assembly 21 and the stator assembly 22, and together with the sealing cover 24 and the housing assembly 23, forms a sealed cavity for placing the stator assembly 22. A hollow rotating shaft 26 is fixedly connected to the middle of the rotor assembly 21, and the head end of the rotating shaft 26 passes through the middle of the sealing cover 24 and is fixedly connected to the impeller 11 opened in the pump body 1 to drive the impeller 11 to rotate. The impeller 11 drives the fluid to enter the rotor assembly 21 through the gap between the rotating shaft 26 and the sealing cover 24, and flows to the tail end of the rotating shaft 26 through the gap between the rotor assembly 21 and the shielding sleeve 25, and finally flows from the tail end to the head end, thereby taking away the heat at the rotor assembly 21 for cooling. The sealing cover 24 is also provided with a plurality of through holes 241 to increase the flow speed of the fluid and accelerate heat dissipation.

[0023] The end of the housing assembly 23 away from the pump body 1 is also provided with a cooling device 3. The cooling device 3 includes a heat sink assembly 31 and a circulation pipe 33. The heat sink assembly 31 is attached to the outer wall of the housing assembly 23 and is connected to the liquid inlet of the pump body 1. The two ends of the circulation pipe 33 are respectively connected to the tail end of the rotating shaft 26 and the liquid outlet of the pump body 1 to increase the flow rate of the fluid in the rotor assembly 21 for cooling.

[0024] like Figure 2 and Figure 4-Figure 7 As shown, the heat sink assembly 31 includes two groups of heat sinks 311, a pair of liquid collecting pipes 312 and a pair of joint pipes 313. The cross section of the heat sink 311 is a "U"-shaped, and the heat sink 311 is fixedly connected to the outer wall of the shell assembly 23 and sealed, and a heat dissipation channel is formed with the shell assembly 23. The outer wall near one end of each group of heat sinks 311 is fixedly connected and communicated with the liquid collecting pipe 312, and the other end extends out of the end of the shell assembly 23 and is fixedly connected and sealed with the joint pipe 313, and the heat dissipation channel further extends through the joint pipe 313. The number of each group of heat sinks 311 is not less than one, and the specific number is determined according to the specifications of different shell assemblies 23. The lower part of the liquid collecting pipe 312 is fixedly connected to one end of the infusion pipe 314, and the other end of the infusion pipe 314 is connected to the liquid inlet of the pump body 1. Fins are arranged on the outer wall of the shell assembly 23, and the heat sink 311 is arranged between adjacent fins.

[0025] The circulation pipeline 33 includes a main circulation pipe 331, an acceleration pipe 332 and a sealing pipe 333. The cross section of the main circulation pipe 331 is a "U"-shaped, and the two ends of the "U" are placed horizontally. The end of the pipe of the lateral part of the upper section of the main circulation pipe 331 is fixedly connected to the liquid outlet of the pump body 1, and is also fixedly connected to the first valve, and the pipe of the lateral part of the lower section is fixedly connected to the acceleration pipe 332. The acceleration pipe 332 is fixedly connected to the tail end of the rotating shaft 26. The sealing pipe 333 is sleeved on the outside of the acceleration pipe 332. The acceleration pipe 332 is a Venturi tube, so that a liquid collecting chamber 334 is formed between the acceleration pipe 332 and the sealing pipe 333. The liquid collecting chamber 334 is connected to the gap between the rotor assembly 21 and the shielding sleeve 25. A liquid inlet hole 3321 is provided in the tightening section in the middle of the acceleration pipe 332. When the fluid flows toward the inside of the rotating shaft 26 through the accelerating tube 332, the accelerating tube 332 can increase the velocity of the fluid, and at the same time, the negative pressure at the liquid inlet hole 3321 can also quickly suck the fluid in the liquid collecting chamber 334 (see Figure 7 ), further increasing the moving speed of the fluid in the rotor assembly 21 and accelerating heat dissipation.

[0026] The sealing pipe 333 includes a covering pipe 3331 and a sealing pipe 3332. The covering pipe 3331 is sleeved on the outer wall of the accelerating pipe 332 and extends to the main circulation pipe 331. The sealing pipe 3332 is sleeved on the outer wall of the main circulation pipe 331. The two ends of the covering pipe 3331 are fixedly connected to the shielding sleeve 25 and the sealing pipe 3332 respectively, and the connection is sealed to prevent the fluid in the liquid collecting chamber 334 from flowing out.

[0027] A support frame 4 is also provided below the sealing pipe 333 , and a support plate 41 is fixedly connected to the support frame 4 . The outer wall of the end of the sealing pipe 3332 close to and away from the cladding pipe 3331 is fixedly connected to the support plate 41 , providing support for the sealing pipe 333 .

[0028] Working principle: The operator immerses the application in the fluid, starts the driving mechanism 2 to drive the impeller 11 to rotate and start the operation. During the operation, the driving mechanism 2 is cooled and cooled in three ways.

[0029] The first type: after the fluid enters through the liquid inlet of the pump body 1, part of the fluid enters the rotor assembly 21 through the gap between the rotating shaft 26 and the sealing cover 24 and the multiple through holes 241, and flows to the liquid collecting cavity 334 at the tail end of the rotating shaft 26 through the gap between the rotor assembly 21 and the shielding sleeve 25, and then enters the accelerating tube 332 through the liquid inlet hole 3321, and finally flows to the head end of the rotating shaft 26, forming an internal circulation. During the fluid flow process, the heat inside the rotor assembly 21 is taken away and the temperature is reduced.

[0030] The second method: open the first valve, and part of the fluid at the liquid outlet of the pump body 1 will enter the main circulation pipe 331, and flow to the head end of the rotating shaft 26 through the accelerating tube 332. When the fluid passes through the liquid inlet 3321 of the accelerating tube 332, a low pressure is formed to increase the speed at which the fluid in the liquid collecting cavity 334 enters the accelerating tube 332, thereby accelerating the flow rate of the fluid in the rotating assembly 21, thereby improving the heat dissipation effect. Since the flow rate of the fluid in the rotor assembly 21 is accelerated, it can prevent the tiny particles in the fluid from being deposited between the rotor assembly 21 and the shielding sleeve 25, thereby affecting the heat dissipation effect.

[0031] The third type: After the present application is immersed in the fluid, the heat dissipation channel will be filled with fluid. When the pump body 1 is working, due to the suction force of the liquid inlet, the fluid in the heat dissipation channel will be sucked away through the infusion tube 314, so that the fluid in the heat dissipation channel is always in a flowing state, thereby absorbing the heat at the shell component 23 for cooling.

[0032] Example 2

[0033] See also Figure 1-Figure 10 , based on Example 1, Figure 4 and Figure 8-Figure 10As shown, the cooling device 3 also includes a heat sink 32. The circulation pipeline 33 also includes a telescopic pipe 335, and the two ends of the telescopic pipe 335 are respectively fixedly connected to the heat sink 32 and the transverse pipe of the upper section of the main circulation pipe 331, and a second valve is also fixedly connected near the main circulation pipe 331. The telescopic pipe 335 is a flexible pipe with telescopic ability, such as a bellows.

[0034] The heat sink 32 includes a flow ring 321, a flow shunt pipe 322 and a support rod 323. The flow ring 321 has a raised bottom, which is slidably connected to a slide groove provided on the upper surface of the support frame 4. The support rod 323 is fixedly connected to the bottom of the inner wall of the flow ring 321, and the upper section of the support rod 323 is fixedly connected to the flow shunt pipe 322. The flow shunt pipe 322 is arranged inside the flow ring 321.

[0035] A pair of liquid storage chambers 3211 are symmetrically opened inside the flow ring 321 along the support rod 323. A plurality of plugs 3212 are fixedly connected to the side of the flow ring 321 close to the joint pipe 313. The plugs 3212 are hollow inside and communicate with the liquid storage chambers 3211. The plugs 3212 match the heat dissipation channel in the joint pipe 313 and are used to be inserted into the heat dissipation channel (see Fig.10 ); Each plug 3212 has a sealing ring on its outer wall to ensure that the plug 3212 is in a sealed state when inserted into the joint pipe 313.

[0036] The diverter pipe fitting 322 includes a diverter pipe 521, two pairs of spoiler pipes 522 and a diverter ring 523. The diverter ring 523 is slidably connected to the outer wall of the sealing pipe 3332 and can move along the sealing pipe fitting 333; the two ends of the support rod 323 are fixedly connected to the bottom of the outer wall of the diverter ring 523 and the bottom of the inner wall of the flow ring 321 respectively. The two ends of the diverter pipe 521 are fixedly connected to the diverter ring 523 and the telescopic tube 335 respectively; the diverter pipe 521 and the diverter ring 523 are hollowed out and communicated. A diverter plate 5231 is fixedly connected to the hollow inner wall of the diverter ring 523, and the diverter plate 5231 extends upward into the diverter pipe 521, which is used to divert the fluid in the diverter pipe 521 so that the fluid can flow evenly to both sides of the diverter plate 5231. Two pairs of spoiler tubes 522 are symmetrically distributed along the support rod 323. The two ends of the spoiler tubes 522 are fixedly connected to the diverter ring 523 and the flow ring 321, respectively, and are communicated with the hollow inside the diverter ring 523 and the liquid storage cavity 3211 inside the flow ring 321, respectively, for conveying fluid. The spoiler tube 522 is a venturi tube, and an air inlet 5221 is opened in the tightening section in the middle of the spoiler tube 522. The air inlet 5221 faces the joint tube 313.

[0037] Working principle: When the present application is working outside the fluid, the operator pushes the flow ring 321 to move toward the joint pipe 313 until the plug 3212 is inserted into the joint pipe 313, and then opens the second valve, and part of the fluid in the main circulation pipe 331 flows into the diverter pipe 521 through the telescopic pipe 335; after being diverted by the diverter plate 5231, it continues to flow, and finally flows to the liquid inlet of the pump body 1 through the diverter ring 523, the spoiler pipe 522, the liquid storage chamber 3211, the plug 3212, the heat dissipation channel and the infusion pipe 314, so as to dissipate the heat of the shell assembly 23. When the fluid passes through the spoiler pipe 522, the low-pressure area formed at the air inlet 5221 sucks in the external gas, and flows to the liquid inlet of the pump body 1 together with the fluid, so that the gas at the air inlet 5221 is in a flowing state. The air inlet 5221 is at the end of the driving mechanism 2 away from the pump body 1, so as to absorb the heat at the end of the driving mechanism 2, cool it down, and achieve double cooling.

[0038] Example 3

[0039] On the basis of Example 2, Figure 6 and Fig.10 As shown, a separation device 6 is also provided on the sealing tube 3332; the separation device 6 is located between the flow ring 321 and the support plate 41. The separation device 6 includes a separation plate 61, a rotating plate 62 and a plurality of separation rods 63. The separation plate 61 and the rotating plate 62 are rotatably connected, and the separation plate 61 is threadedly connected to the sealing tube 3332. A plurality of separation rods 63 are fixedly connected to one side of the rotating plate 62 close to the joint tube 313; the length of the separation rod 63 is equal to the moving distance of the flow ring 321 when the plug 3212 is inserted into the joint tube 313. The separation rod 63 passes between the diverter tube 521 and the spoiler tube 522, and the end of the separation rod 63 is fixedly connected with an abutment plate 631 for abutting the diverter tube 521 or the diverter ring 523.

[0040] Working principle: When the application finishes working outside the fluid, the operator rotates the separation plate 61, so that the separation plate 61 drives the rotating plate 62, the separation rod 63 and the abutment plate 631 to move in the direction away from the flow ring 321, and the abutment plate 631 pushes the flow ring 321 to move in the same direction, thereby separating the plug 3212 from the joint pipe 313, avoiding manual separation from causing damage to key parts such as the sealing pipe 333, the acceleration pipe 332 and the main circulation pipe 331, thereby reducing the service life.

Claims

1. A canned motor pump with accelerated heat dissipation function, characterized in that: The pump comprises a pump body (1) and a driving mechanism (2); the driving mechanism (2) is fixedly connected to the pump body (1); the driving mechanism (2) comprises a rotor assembly (21), a stator assembly (22) and a housing assembly (23) which are arranged in sequence from the inside to the outside; The driving mechanism (2) further comprises a sealing cover (24) and a shielding sleeve (25); the sealing cover (24) is arranged between the pump body (1) and the stator assembly (22); the sealing cover (24) is further provided with a plurality of through holes (241); the shielding sleeve (25) is arranged between the rotor assembly (21) and the stator assembly (22), and together with the sealing cover (24) and the housing assembly (23) forms a sealed cavity for accommodating the stator assembly (22); a hollow rotating shaft (26) is fixedly connected to the middle of the rotor assembly (21); the front end of the rotating shaft (26) passes through the middle of the sealing cover (24) and is fixedly connected to an impeller (11) provided in the pump body (1), so as to drive the impeller (11) to rotate; The impeller (11) drives the fluid to enter the rotor assembly (21) through the gap between the rotating shaft (26) and the sealing cover (24) and the through hole (241), and then flows to the rear end of the rotating shaft (26) through the gap between the rotor assembly (21) and the shielding sleeve (25), and finally flows from the rear end to the front end, thereby forming an internal circulation channel for the flow of the fluid.

2. A shielded pump with accelerated heat dissipation function according to claim 1, characterized in that: A cooling device (3) is also provided at the end of the shell component (23) away from the pump body (1); the cooling device (3) comprises a heat sink component (31) and a circulation pipe (33); the heat sink component (31) is attached to the outer wall of the shell component (23) and is connected to the liquid inlet of the pump body (1); and the two ends of the circulation pipe (33) are respectively connected to the rear end of the rotating shaft (26) and the liquid outlet of the pump body (1).

3. A shielded pump with accelerated heat dissipation function according to claim 2, characterized in that: The heat sink assembly (31) comprises two groups of heat sinks (311), a pair of liquid collecting pipes (312) and a pair of joint pipes (313); the heat sinks (311) are sealedly connected to the outer wall of the housing assembly (23) and form a heat dissipation channel with the housing assembly (23); one end of each group of heat sinks (311) is sealedly connected to the corresponding liquid collecting pipe (312), and the other end is sealedly connected to the joint pipe (313), and the heat dissipation channel further penetrates the joint pipe (313); the lower part of the liquid collecting pipe (312) is connected to a liquid infusion pipe (314) connected to the liquid inlet of the pump body (1).

4. A shielded pump with accelerated heat dissipation function according to claim 2, characterized in that: The circulation pipeline (33) comprises a main circulation pipe (331), an accelerating pipe (332) and a sealing pipe fitting (333); two ends of the main circulation pipe (331) are respectively fixedly connected to the liquid outlet of the pump body (1) and the accelerating pipe (332); the accelerating pipe (332) is fixedly connected to the tail end of the rotating shaft (26); the sealing pipe fitting (333) is sealed around the outside of the accelerating pipe (332) and the main circulation pipe (331); and a support frame (4) is further provided below the sealing pipe fitting (333).

5. A shielded pump with accelerated heat dissipation function according to claim 4, characterized in that: The accelerating tube (332) is a Venturi tube, so that a liquid collecting chamber (334) is formed between the accelerating tube (332) and the sealing tube (333); the liquid collecting chamber (334) is communicated with the gap between the rotor assembly (21) and the shielding sleeve (25); and a liquid inlet hole (3321) is provided in the tightening section in the middle of the accelerating tube (332) for sucking the fluid in the liquid collecting chamber (334).

6. A canned motor pump with accelerated heat dissipation function according to claim 4, characterized in that: The cooling device (3) further comprises a heat sink (32); the circulation pipeline (33) further comprises a flexible telescopic tube (335) having telescopic capability, and both ends of the telescopic tube (335) are respectively fixedly connected to the heat sink (32) and the main circulation pipe (331).

7. A canned motor pump with accelerated heat dissipation function according to claim 6, characterized in that: The heat sink (32) comprises a flow ring (321), a flow distribution pipe (322) and a support rod (323); the flow ring (321) is slidably connected to the upper surface of the support frame (4); the support rod (323) is fixedly connected to the bottom of the inner wall of the flow ring (321); the flow distribution pipe (322) is arranged inside the flow ring (321) and is in communication with the flow ring (321).

8. The canned motor pump with accelerated heat dissipation function according to claim 7, characterized in that: A pair of liquid storage cavities (3211) are symmetrically provided inside the flow ring (321) along the support rod (323); a plurality of plugs (3212) are fixedly connected to the side of the flow ring (321) close to the joint pipe (313); the plugs (3212) are hollow inside and communicate with the liquid storage cavities (3211); and the plugs (3212) are used for sealing and plugging with the heat dissipation channel in the joint pipe (313).

9. The canned motor pump with accelerated heat dissipation function according to claim 7, characterized in that: The flow diversion pipe fitting (322) comprises a flow diversion pipe (521), two pairs of spoiler pipes (522) and a flow diversion ring (523); the flow diversion ring (523) is slidably connected to the outer wall of the sealing pipe fitting (333); the two ends of the support rod (323) are respectively fixedly connected to the flow diversion ring (523) and the flow ring (321); the two ends of the flow diversion pipe (521) are respectively fixedly connected to the flow diversion ring (523) and the telescopic pipe (335); the flow diversion pipe (521) and the flow diversion ring (523) are hollow inside and communicate with each other; the two pairs of spoiler pipes (522) are symmetrically distributed along the support rod (323).

10. A canned motor pump with accelerated heat dissipation function according to claim 9, characterized in that: The two ends of the spoiler tube (522) are respectively fixedly connected to the diverter ring (523) and the flow ring (321), and are respectively in communication with the hollow space in the diverter ring (523) and the liquid storage cavity (3211) in the flow ring (321), for conveying fluid; the spoiler tube (522) is a Venturi tube, and a tightening section in the middle of the spoiler tube (522) is provided with an air inlet (5221) facing the joint tube (313).

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