Submersible motor with external cooling circulation and submersible pump

Abstract

The utility model provides a submersible motor with external cooling circulation and a submersible pump, and belongs to the technical field of submersible pumps, the submersible motor comprises a submersible motor body, a water outlet pipe, a water injection pipe, a circulating water pump and a water tank, the submersible motor body is provided with a water injection hole and a drainage hole, and the drainage hole is communicated with an inlet of the water tank through the water outlet pipe; an outlet of the circulating water pump communicates with the water injection hole through a water injection pipe. An active outer cooling circulation system composed of the water tank, the water outlet pipe, the water injection pipe and the circulating water pump can guarantee sufficient flowing of cooling water, the situation that cooling water flows slowly or stops flowing, and consequently heat dissipation is poor is avoided, and the shapes of position pipelines and the positions of all equipment can be flexibly arranged. The submersible motor with the external cooling circulation is applied to a submersible pump, the submersible pump can be used in an inclined or horizontal mode, the submersible motor can be used in special occasions such as mine inclined shafts or reservoirs, and the cooling effect of the submersible motor can be ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of submersible pumps, and more particularly relates to a submersible motor with external cooling circulation and a submersible pump. BACKGROUND

[0002] The use mode of the structural design of the submersible pump is vertical upright use, the submersible motor is a water-filled structure, the inlet is located above the motor, and is used for cooling the motor from bottom to top by water flow when used in deep wells, but in some special occasions, such as mine inclined shafts, reservoirs and the like, horizontal installation is required, the cooling effect of the submersible motor is poor due to the change of the water flow direction, and the service life of the submersible pump is reduced.

[0003] Based on the above problems, the Chinese utility model patent with the publication number CN217873444U discloses a horizontal submersible pump external circulation cooling mechanism. Figure 1 In the scheme shown in the patent, the water injection pipe joint, the drain pipe joint, the pipeline and the back-shaped pipe radiator form an external circulation cooling mechanism. During operation, heat is generated at the thrust bearing and the motor coil to heat the clean water, the clean water flows upward, flows out of the submersible motor cavity, exchanges heat with the surrounding water body in the back-shaped pipe radiator, and then flows back to the submersible motor cavity through the drain pipe joint, so that the submersible motor cavity is kept in a low-temperature operating state. The flow of clean water is realized by temperature difference.

[0004] However, in actual use, since the flow path of the clean water in the back-shaped pipe radiator is relatively long, the total flow resistance is also relatively increased, and the flow effect is poor due to the flow by temperature difference, so it is difficult to completely ensure the smooth circulation of cooling. At the same time, the water injection pipe and the drain pipe cannot be set too long, and the height difference between the entire external circulation cooling mechanism and the submersible motor cannot be set too large, otherwise the flowability of the clean water flowing by temperature difference will be further reduced. The above reasons will result in poor flexibility of the arrangement mode of the entire external circulation cooling mechanism, and it is difficult to meet the complex site environment. SUMMARY

[0005] To solve the problems of the prior art, the application provides a submersible motor with external cooling circulation and a submersible pump, which can cool the submersible motor by active circulation, ensure the flowability of the cooling water, and make the entire external circulation cooling mechanism more flexible.

[0006] To achieve the above-mentioned purpose, the technical scheme of the application provides a submersible motor with external cooling circulation, which comprises a submersible motor body, a water outlet pipe and a water injection pipe, the submersible motor body has a water injection hole and a drain hole; further comprising a circulating water pump and a water tank, the drain hole is communicated with the inlet of the water tank through the water outlet pipe, the outlet of the water tank is communicated with the inlet of the circulating water pump, and the outlet of the circulating water pump is communicated with the water injection hole through the water injection pipe.

[0007] Under the driving of the circulating water pump, the cooling water circulates in the submersible motor body, the water tank and the circulating water pump in turn to take away the heat in the submersible motor body. For the case of low heat generation, the cooling water can be naturally cooled and cooled in the water tank to dissipate heat. Since the circulating water pump can provide power for the circulation of the cooling water, the cooling water can flow and circulate fully, and the poor heat dissipation caused by slow or stagnant flow of the cooling water will not occur. At the same time, according to the site conditions, the water injection pipe and the drain pipe can also be set longer, and a certain bending or a hose can also be provided, and the height difference between the submersible motor body and the water tank and the circulating water pump can also be adjusted appropriately, so that the arrangement of the whole system is more flexible and less limited by space. The increased flow resistance is overcome by the power provided by the circulating water pump to ensure the flowability of the cooling water.

[0008] Optionally, the top of the water tank has a filling valve, and the bottom of the water tank has a drain valve. After a long time of use, the deposited sediment can be discharged through the drain valve, and the cooling water can be filled through the filling valve to ensure the sufficiency of the amount of cooling water.

[0009] Optionally, the part of the water outlet pipe close to the drain hole is a submerged section, and the outer side wall of the submerged section is provided with heat dissipation fins. In actual use, the submerged section will sink into the water, and heat exchange will be carried out with the water through the heat dissipation fins, and the heat dissipation effect is better than that of convection heat dissipation through air.

[0010] Optionally, the outer side of the heat dissipation fins is sleeved with a protective sleeve, and the outer side wall of the submerged section is provided with ribs, and the submerged section is connected with the protective sleeve through the ribs. The protective sleeve can protect the relatively fragile heat dissipation fins from being damaged by knocking.

[0011] Optionally, it further comprises a return pipe radiator, the inlet of the return pipe radiator is communicated with the inlet of the water tank through the water outlet pipe, and the outlet of the return pipe radiator is communicated with the inlet of the water tank. The return pipe radiator can further improve the heat dissipation efficiency of the whole system to meet the heat dissipation demand of the high-power submersible motor.

[0012] The technical scheme of the present application provides a submersible pump, which comprises a pump body and a submersible motor with external cooling circulation as shown in any one of the above, and the pump body is connected with the submersible motor body. The whole submersible pump has a driven external cooling circulation structure, and can be used in inclined or horizontal mode, which can be used in special occasions such as mine inclined shaft or reservoir, and can meet the heat dissipation demand of the submersible motor body.

[0013] Optionally, it further comprises a base, and the pump body and the submersible motor body are installed horizontally on the base. In use, the base sinks into the bottom of the water body and suspends the whole submersible pump, so that the inlet and outlet of the pump body will not contact the bottom of the water body, and too much debris will not enter and block the pump body.

[0014] The beneficial effects of the technical scheme of the present application relative to the prior art are:

[0015] The active external cooling circulation system composed of the water tank, the water outlet pipe, the water injection pipe and the circulating water pump can ensure sufficient flow of the cooling water, and will not cause poor heat dissipation caused by slow or stagnant flow of the cooling water, and can flexibly arrange the shape of the pipeline and the position of each device to meet the arrangement requirements of complex site environment. The submersible motor with external cooling circulation is applied in the submersible pump, can be used in inclined or horizontal manner, and can be used in special occasions such as mine inclined shaft or reservoir, and can ensure the cooling effect of the main body of the submersible motor. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of the first submersible motor with external cooling circulation.

[0018] Figure 2 It is a schematic diagram of the overall structure of the second submersible motor with external cooling circulation. Figure 1 It is a local enlarged view of A in the middle.

[0019] Figure 3 It is a schematic diagram of the overall structure of the third submersible motor with external cooling circulation.

[0020] Figure 4 It is a schematic diagram of the overall structure of the third submersible motor with external cooling circulation.

[0021] Figure 5 It is a schematic diagram of the overall structure of the submersible pump.

[0022] Figure legend: 1, submersible motor main body; 2, water outlet pipe; 3, water injection pipe; 4, water injection hole; 5, drain hole; 6, circulating water pump; 7, water tank; 8, filling valve; 9, drain valve; 10, immersion section; 11, heat dissipation fin; 12, protective sleeve; 13, rib; 14, back-shaped pipe radiator; 15, pump body; 16, base. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0024] Embodiment 1:

[0025] The embodiment provides a submersible motor with external cooling circulation, based on Figure 1 As shown in the figure, the submersible motor body 1 has a water injection hole 4 and a water outlet hole 5. On the basis of the above structure, a circulating water pump 6 and a water tank 7 are further included, the water outlet hole 5 is communicated with the inlet of the water tank 7 through the water outlet pipe 2, the outlet of the water tank 7 is communicated with the inlet of the circulating water pump 6, and the outlet of the circulating water pump 6 is communicated with the water injection hole 4 through the water injection pipe 3. The water outlet pipe 2, the water injection pipe 3, the water tank 7 and the circulating water pump 6 constitute a forced external circulation heat dissipation system of the submersible motor body 1. The entire system and the submersible motor body 1 are filled with cooling water.

[0026] In use, under the driving of the circulating water pump 6, the cooling water is sequentially circulated in the submersible motor, the water tank 7 and the circulating water pump 6 to take away the heat in the submersible motor. For the case that the heat is not high, the cooling water can be cooled by natural cooling in the water tank 7 to meet the cooling demand. Since the circulating water pump 6 can provide power for the circulation of the cooling water, the cooling water can fully flow and circulate, and the poor heat dissipation caused by slow or stagnant flow of the cooling water will not occur. Meanwhile, according to the site condition, the water injection pipe 3 and the water outlet pipe can be set to be long, can be set to be bent or be made of a hose, and the height difference between the submersible motor and the water tank 7 and the circulating water pump 6 can be appropriately made, so that the arrangement of the entire system is more flexible and is less limited by space. The increased flow resistance is overcome by the power provided by the circulating water pump 6, so that the flowability of the cooling water is ensured.

[0027] Meanwhile, the top of the water tank 7 is provided with a filling valve 8, and the bottom of the water tank 7 is provided with a blowdown valve 9. After long time use, the deposited residues can be discharged through the blowdown valve 9, and the cooling water can be filled through the filling valve 8 to ensure the sufficiency of the amount of the cooling water.

[0028] Further, based on Figure 1 and Figure 2 As shown in the figure, the part of the water outlet pipe 2 close to the water outlet hole 5 is a submerged section 10, and the outer side wall of the submerged section 10 is provided with heat dissipation fins 11. Since the submersible motor body 1 is located below the water surface during work, a part of the water outlet pipe 2 will be located below the liquid level. The submerged section 10 is the part immersed in the water during work. The heat dissipation fins 11 exchange heat with the external water body through convection to cool the cooling water, and the effect is better than that of air cooling. Since the heat dissipation fins 11 are located at the water outlet pipe 2 and close to the water outlet hole, the temperature difference between the cooling water and the external environment is the largest at this time, so that the heat dissipation efficiency is improved. Of course, even if the heat dissipation fins 11 are not completely immersed in the water, the heat dissipation fins 11 located above the liquid level can also improve the heat dissipation efficiency by increasing the contact area with the air.

[0029] The outer side of the heat dissipation fin 11 is sleeved with the protective sleeve 12, the outer side wall of the immersion section 10 is provided with the fin 13, and the immersion section 10 is connected with the protective sleeve 12 through the fin 13. The protective sleeve 12 can protect the relatively fragile heat dissipation fin 11 and avoid damage caused by knocking. The fin 13 will not affect the entry of the external water body into the protective sleeve 12.

[0030] Embodiment 2

[0031] The embodiment provides a submersible motor with an external cooling cycle, based on Figure 3 The difference between the technical scheme in the embodiment 1 and the technical scheme in the embodiment 2 lies in that the technical scheme in the embodiment 2 does not have the immersion section 10, the heat dissipation fin 11, the protective sleeve 12 and the fin 13 structure. The technical scheme in the embodiment 2 further comprises a return type pipe radiator 14, an inlet of the return type pipe radiator 14 is communicated with an inlet of the water tank 7 through the water outlet pipe 2, and an outlet of the return type pipe radiator 14 is communicated with the inlet of the water tank 7. The return type pipe radiator 14 further improves the heat dissipation efficiency of the whole system by increasing the heat exchange area with air.

[0032] Embodiment 3

[0033] The embodiment provides a submersible motor with an external cooling cycle, based on Figure 4 The difference between the technical scheme in the embodiment 1 and the technical scheme in the embodiment 2 lies in that the technical scheme in the embodiment 2 does not have the immersion section 10, the heat dissipation fin 11, the protective sleeve 12 and the fin 13 structure. The technical scheme in the embodiment 2 further comprises a return type pipe radiator 14, an inlet of the return type pipe radiator 14 is communicated with an inlet of the water tank 7 through the water outlet pipe 2, and an outlet of the return type pipe radiator 14 is communicated with the inlet of the water tank 7. The return type pipe radiator 14 further improves the heat dissipation efficiency of the whole system by increasing the heat exchange area with air.

[0034] Embodiment 4

[0035] The embodiment provides a submersible motor with an external cooling cycle, based on Figure 5 The difference between the technical scheme in the embodiment 1 and the technical scheme in the embodiment 2 lies in that the technical scheme in the embodiment 2 does not have the immersion section 10, the heat dissipation fin 11, the protective sleeve 12 and the fin 13 structure. The technical scheme in the embodiment 2 further comprises a return type pipe radiator 14, an inlet of the return type pipe radiator 14 is communicated with an inlet of the water tank 7 through the water outlet pipe 2, and an outlet of the return type pipe radiator 14 is communicated with the inlet of the water tank 7. The return type pipe radiator 14 further improves the heat dissipation efficiency of the whole system by increasing the heat exchange area with air.

[0036] Further, the pump body 15 and the submersible motor body 1 are horizontally installed on the base 16. During use, the base 16 is sunk into the bottom of the water body and the whole submersible pump is suspended, so that the inlet and outlet of the pump body 15 are not in contact with the bottom of the water body, and too much sundries are prevented from entering and clogging the pump body 15.

[0037] The above merely provides preferred embodiments of the application, and is not used to limit the application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the application shall fall within the protection scope of the application.

Claims

1. A submersible motor having an external cooling cycle, comprising a submersible motor body, a water outlet pipe, and a water injection pipe, the submersible motor body having a water injection hole and a water discharge hole; characterized in that: Further comprising a circulating water pump and a water tank, the drain hole is communicated with the inlet of the water tank through the water outlet pipe, the outlet of the water tank is communicated with the inlet of the circulating water pump, and the outlet of the circulating water pump is communicated with the water injection hole through the water injection pipe.

2. A submersible motor with external cooling circulation as claimed in claim 1, characterized in that: The top of the water tank is provided with a filling valve, and the bottom of the water tank is provided with a sewage valve.

3. A submersible motor with external cooling circulation according to claim 1 or 2, characterized in that: The part of the water outlet pipe close to the drain hole is a submerged section, and the outer side wall of the submerged section is provided with heat dissipation fins.

4. A submersible motor with external cooling circulation as claimed in claim 3, characterized in that: The outer side of the heat dissipation fins is sleeved with a protective sleeve, the outer side wall of the submerged section is provided with a rib, and the submerged section is connected with the protective sleeve through the rib.

5. A submersible motor with external cooling circulation as claimed in claim 1 or 2, characterized in that: Further comprising a U-tube radiator, the inlet of the U-tube radiator is communicated with the inlet of the water tank through the water outlet pipe, and the outlet of the U-tube radiator is communicated with the inlet of the water tank.

6. A submersible pump characterized by: Further comprising a base, and the pump body and the submersible motor body are horizontally installed on the base through bolts.

7. The submersible pump of claim 6, wherein: Further comprising a base, and the pump body and the submersible motor body are horizontally installed on the base through bolts.

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