High-temperature-resistant deep well submersible pump

Abstract

The utility model provides a high-temperature-resistant deep well submersible pump, which comprises a driving motor, a high-temperature-resistant submersible pump and a high-temperature-resistant submersible pump, the submersible pump body comprises a pump shell and fan blades which are arranged in the pump shell and are in transmission connection with the output shaft, a water pumping channel is formed between the pump shell and the fan blades, and a water inlet communicated with the water pumping channel is formed between the output shaft and the pump shell; the water lifting pipe is communicated with the water lifting channel and used for conveying the deep well water to the ground; a cooling cavity with an opening in the upper end is formed in the cooling sleeve shell, and a machine shell of the driving motor is arranged in the cooling cavity; according to the utility model, heat dissipation is carried out on the casing of the driving motor through the cooling water, the influence of high temperature of well water on the casing is reduced, the use amount of the cooling water is limited through the cooling sleeve casing, the input of the cooling water is controlled according to temperature feedback, waste caused by continuous water pumping is avoided, and the service life is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of submersible pump, in particular to a high temperature resistant deep well submersible pump. BACKGROUND

[0002] Submersible pump is the key equipment for deep well (such as machine well) water lifting, and is suitable for various occasions, including but not limited to domestic water supply, mine rescue, industrial cooling system, farmland irrigation, seawater lifting, ship load adjustment and fountain landscape design. Under certain special geological conditions, there may be high-temperature groundwater in newly drilled deep wells, and the temperature can be as high as 90 to 100 degrees Celsius. Such high-temperature environment poses a challenge to ordinary submersible pumps, which are easily damaged when working at extreme temperatures, resulting in a significantly shortened service life of only about a month.

[0003] In order to adapt to the application requirements in high-temperature well environment, it is necessary to develop a submersible pump solution that can withstand and work effectively. In the prior art, for example, Chinese utility model patent CN218509737U discloses a submersible pump specially designed for high-temperature hot spring well, which reduces the water temperature around the submersible pump by introducing an auxiliary pipe to transport cooling water into the well, thereby prolonging the service life of the submersible pump.

[0004] However, in order to achieve effective cooling effect, the above-mentioned scheme needs to continuously pump a large amount of cooling water into the deep well, and in order to maintain the normal operation of the submersible pump, the cooling process must be carried out continuously, which not only increases the operation complexity, but also causes waste of water resources.

[0005] Therefore, the present inventors specially designed a high-temperature resistant deep well submersible pump, and the present case was generated. SUMMARY

[0006] In order to solve the above problems, the technical scheme of the utility model is as follows:

[0007] A high-temperature resistant deep well submersible pump comprises, from bottom to top:

[0008] A driving motor comprising a motor housing and an output shaft;

[0009] A submersible pump body comprising a pump housing and a fan blade arranged in the pump housing and drivingly connected to the output shaft, a water lifting channel being formed between the pump housing and the fan blade, and a water inlet being formed between the output shaft and the pump housing and communicating with the water lifting channel;

[0010] A water lifting pipe communicating with the water lifting channel and used for conveying deep well water to the ground;

[0011] Further comprising:

[0012] A cooling sleeve, in which a cooling cavity with an open upper end is formed, and the motor housing of the driving motor is arranged in the cooling cavity;

[0013] cooling pipe, connecting the external water supply unit, for pumping cooling water into the cooling cavity.

[0014] Preferably, the cooling jacket is in the shape of an open-ended long cylinder, and the inner diameter of the cooling cavity is larger than the outer diameter of the casing to form a gap for the cooling water to flow out and into the cooling pipe.

[0015] Preferably, the cooling pipe comprises a stainless steel pipe attached to the water lifting pipe and the body of the submersible pump extending downward, and a PPR pipe connected to the stainless steel pipe through a joint to enter the cooling cavity through the gap.

[0016] Preferably, the cooling pipe is provided with at least two.

[0017] Preferably, the end of the cooling pipe extends to the bottom of the cooling cavity.

[0018] Preferably, the end of the cooling pipe is provided with a water distributor, and the surface of the water distributor is provided with a plurality of water distribution holes communicating with the cooling pipe.

[0019] Preferably, the water supply unit further comprises a cooling water supply unit and a booster pump, and the input end of the booster pump is connected to the water supply unit and the output end is connected to the cooling pipe.

[0020] Preferably, the control box is electrically connected to the driving motor.

[0021] Preferably, the driving motor is an oil-filled underwater motor or a surface line motor.

[0022] Preferably, the driving motor is a surface line motor, the casing of which is directly exposed to the water in the deep well, and the casing has a stator formed by a coil and a rotor formed by an output shaft, a flow gap is formed between the rotor and the stator, the surface of the casing forms a water inlet and a water outlet in the area where the flow gap is located, and the cooling pipe is directly connected to the water inlet on the casing.

[0023] The beneficial effects of the utility model are as follows:

[0024] The utility model restricts the casing of the driving motor in a certain range of cooling cavity, pumps the external cooling water into the cooling cavity through the cooling pipe, and cools the casing of the driving motor, which can prevent the casing from being directly affected by the high temperature of the water in the deep well and from being heated too quickly, and can also limit the range of the cooling water, greatly reducing the amount of the cooling water, and achieving the cooling effect of the prior art with less amount of the cooling water, thereby prolonging the service life of the deep well submersible pump.

[0025] Meanwhile, according to the temperature feedback of the driving motor, the input state of the cooling water can be controlled according to the temperature change, compared with the existing cooling scheme, the cooling water does not need to be continuously pumped, and the waste of cooling water and electric energy is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. The above and other aspects of the present application will become more apparent by describing in detail the embodiments thereof with reference to the attached drawings in which:

[0027] Wherein:

[0028] Figure 1 is a schematic diagram of the overall structure of the embodiment one of the present application;

[0029] Figure 2 is a schematic diagram of the local cross-sectional structure highlighting the driving motor and the cooling sleeve shell in the embodiment one of the present application;

[0030] Figure 3 is a schematic diagram of the local cross-sectional structure highlighting the cooling sleeve shell and the cooling pipe in the embodiment one of the present application;

[0031] Figure 4 is a connection principle block diagram of the embodiment one of the present application;

[0032] Figure 5 is a connection principle block diagram of the electric control system in the embodiment one of the present application;

[0033] Figure 6 is a schematic diagram of the local structure highlighting the driving motor in the embodiment two of the present application;

[0034] Figure 7 is a schematic diagram of the local cross-sectional structure of the water line type motor in the embodiment two of the present application.

[0035] Label explanation:

[0036] 10, driving motor; 11, machine shell; 111, water inlet; 112, water outlet; 113, stator; 114, rotor; 115, flow gap; 12, output shaft; 20, submersible pump body; 21, pump shell; 22, fan blade; 23, water inlet; 30, water lifting pipe; 40, cooling sleeve shell; 41, cooling cavity; 42, gap; 43, connecting sheet; 44, connecting hole; 50, cooling pipe; 51, stainless steel pipe; 52, PPR pipe; 60, booster pump; 70, water distributor; 71, water distribution hole; 80, control box; 81, electric control system; 82, waterproof cable; 90, motor temperature sensor. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects of the utility model clearer and more understandable, the utility model 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 utility model and not to limit the utility model. Embodiments

[0038] Please refer to Figures 1 to 5 , which is a high-temperature resistant deep-well submersible pump as the best embodiment of the utility model, sequentially comprising from bottom to top:

[0039] The driving motor 10 comprises a casing 11 and an output shaft 12.

[0040] The submersible pump body 20 comprises a pump casing 21 and a fan blade 22 arranged in the pump casing 21 and drivingly connected to the output shaft 12. A water lifting passage (not shown in the figure) is formed between the pump casing 21 and the fan blade 22, and a water inlet 23 is formed between the output shaft 12 and the pump casing 21 to communicate with the water lifting passage.

[0041] The water lifting pipe 30 communicates with the water lifting passage and is used to deliver the deep-well water to the ground.

[0042] In the embodiment, the driving motor 10, the submersible pump body 20 and the water lifting pipe 30 all have a cylindrical shape and are sequentially connected along the same axis, so that they can be conveniently placed in a deep well of a certain size.

[0043] The water lifting pipe 30 is bent and adapted according to actual needs above the wellhead of the deep well, and only the downhole part thereof is limited in the embodiment.

[0044] The sizes of the deep well in the prior art generally include 127 mm, 146 mm, 168 mm, 194 mm and 219 mm, and the sizes of the submersible pump for the above deep well are generally 4 inches, 6 inches, 8 inches and 10 inches.

[0045] As shown in Figure 1 , the deep-well water has a static water level in an initial state and a dynamic water level in a water pumping state. The deep-well submersible pump needs to be placed below the dynamic water level when pumping the well water to realize a stable water pumping process.

[0046] The embodiment further comprises a cooling sleeve 40, a cooling pipe 50 and an external water delivery unit.

[0047] The cooling sleeve 40 has a long cylindrical shape as a whole, and an open cooling cavity 41 is formed in the inside of the cooling sleeve 40, and the casing 11 of the driving motor 10 is arranged in the cooling cavity 41.

[0048] Specifically, as shown in Figure 2 , 3As shown, the inner diameter D1 of the cooling jacket 40 is larger than the outer diameter D2 of the casing 11, and the opening of the cooling jacket 40 is sleeved upward along the bottom of the casing 11 of the driving motor 10, so that the casing 11 of the driving motor 10 is completely placed in the cooling cavity 41, and a gap 42 is formed between the cooling cavity 41 and the outer circumferential side of the casing 11 for the outflow and inflow of the cooling water into the cooling pipe 50.

[0049] As shown in Figure 2 , 3 , in order to realize the connection and fixation of the cooling jacket 40, a plurality of connecting pieces 43 are integrally extended upward at the opening position of the upper end of the cooling cavity 41, and the upper end of the connecting piece 43 forms a connecting hole 44, so as to lock and fix the connecting piece 43 at the corresponding locking position on the pump casing 21 of the submersible pump body 20, so that the cooling jacket 40 is integrated with the entire deep-well submersible pump and maintains its stable state in the deep well.

[0050] Among them, the design position of the upper end opening of the cooling jacket 40 needs to be lower than the water inlet 23 at the lower end of the submersible pump body 20, so as to avoid affecting the normal pumping of the deep-well submersible pump.

[0051] In order to better realize the cooling of the driving motor 10, the cooling jacket 40 can be made of a corresponding heat preservation material, such as a metal jacket with a heat preservation layer, which can not only maintain its structural strength, but also can isolate the heat of the deep-well water to a certain extent, so as to avoid the direct action of high temperature on the casing 11 of the driving motor 10.

[0052] Further, the cooling pipe 50 is connected to an external water conveying unit for pumping cooling water into the cooling cavity 41.

[0053] In this embodiment, as shown in Figure 1 , 2 , the cooling pipe 50 includes a stainless steel pipe 51 and a PPR pipe 52, the stainless steel pipe 51 is attached to the water lifting pipe 30 and the submersible pump body 20 and extends downward, and the PPR pipe 52 is connected to the stainless steel pipe through a joint and then penetrates into the gap 42 to enter the cooling cavity 41.

[0054] In order to realize the attachment and fixation of the stainless steel pipe 51, it can be locked and fixed on the outer circumferential wall surface of the water lifting pipe 30 and the submersible pump body 20 by a clamp.

[0055] Alternatively, a limiting hole can be formed on the connecting flange of the water lifting pipe 30, the stainless steel pipe 51 is penetrated into the limiting hole, and the limiting fixation of the cooling pipe 50 can also be realized by the cooperation of a plurality of limiting holes (not shown in the figure).

[0056] In addition, the cooling pipe 50 can also extend to the bottom of the outer wall of the cooling jacket 40 and then penetrate into the cooling jacket 40. This design can further reduce the outer diameter of the cooling jacket 40, and the size of the gap 42 is also reduced synchronously. This can reduce the water output of the cooling water to a certain extent, which can be used as an alternative (not shown in the figure).

[0057] Preferably, as shown in the figure, the water supply unit includes a cooling water supply unit and a booster pump 60. The input end of the booster pump 60 is connected to the water supply unit, and the output end is connected to the cooling pipe 50. Figure 1

[0058] The water supply unit can be directly connected to the municipal water source or a storage container such as a cooling water storage tank. The booster pump 60 is used to increase the water pressure to overcome the water pressure of the deep well water and realize the smooth pumping of the cooling water in the cooling cavity 41. In addition, the cooling water is not specifically low-temperature water, and a water source with a water temperature lower than that of the deep well water can be selected, and the preferred is tap water at room temperature.

[0059] Preferably, as shown in the figure, the cooling pipe 50 is provided with at least two. Figure 3

[0060] In this embodiment, the cooling pipe 50 is provided with two, which can also be other more quantities, and here two is taken as an example. Two or more cooling pipes 50 can maintain the water flow of the cooling water, and the external water source generally contains a certain amount of impurities. During the long-time transportation process, the cooling pipe 50 is easy to be blocked. By increasing the number of cooling pipes 50, the cooling pipe 50 can be used as a standby pipeline, which can reduce the probability of causing the cooling water to be not timely transported due to the blockage of the cooling pipe 50, and the working temperature of the driving motor 10 is abnormally high.

[0061] Preferably, as shown in the figure, the end of the cooling pipe 50 extends to the bottom of the cooling cavity 41. Figure 1 2

[0062] Preferably, as shown in the figure, the end of the cooling pipe 50 is provided with a water distributor 70, and the surface of the water distributor 70 is provided with a plurality of water distribution holes 71 communicating with the cooling pipe 50. Figure 1 2

[0063] ​​​​​​In this embodiment, the water distributor 70 is a cylindrical structure, which forms a water distribution chamber (not shown in the figure) that connects to the cooling pipe 50. The surface of the water distributor 70 is evenly distributed with water distribution holes 71 that connect to the water distribution chamber. On the water supply unit side, a corresponding filter screen or other structure can be set to filter and remove impurities from the cooling water, so as to prevent impurities from flowing down the cooling pipe 50 and entering the cooling chamber 41 and being accidentally sucked into the drive motor 10 or the submersible pump body 20.

[0064] In particular, such as Figure 1 , 4 As shown in Figure 5, in order to achieve intelligent control of the entire process, the design scheme of this deep well submersible pump also includes a control box 80 and a motor temperature sensor 90, wherein:

[0065] The control box 80 contains an electrical control system 81, such as a PLC controller and an MCU circuit board. The outer surface of the control box is equipped with corresponding control buttons and a stop button (not shown in the figure). A waterproof cable 82 is led out from the electrical control system 81. The waterproof cable 82 extends downward along the periphery of the water delivery pipe 30 and the submersible pump body 20, and finally electrically connects to the control part inside the housing 11 of the drive motor 10, thereby controlling the start and stop of the drive motor 10. When the drive motor 10 is turned on, its output shaft 12 drives the fan blade 22 inside the submersible pump body 20 to rotate. The submersible pump body 20 generates a certain head, which draws well water below the dynamic water level of the deep well from the inlet 23 and transports it to the ground along the water delivery channel and the water delivery pipe 30.

[0066] In addition, a motor temperature sensor 90 for monitoring the temperature of the housing 11 can be added at the location of the drive motor 10 housing 11. It is electrically connected to the electrical control system 81 in the control box 80 through the waterproof cable 82 of the large motor. The output end of the electrical control system 81 is also electrically connected to the booster pump 60 (generally installed on the ground, which can be easily connected to the electrical control system 81). The standard operating temperature of the drive motor 10 is preset.

[0067] When the temperature of the well water in the deep well exceeds the high temperature of the healthy operating environment of the drive motor 10, the motor temperature sensor 90 detects that the temperature in the cooling chamber 41 outside the housing 11 is higher than the preset value. The electronic control system 81 will then activate the booster pump 60 to pump cooling water into the bottom of the cooling chamber 41, quickly replacing the water in the cooling chamber 41 with cooler water, thereby achieving the purpose of rapid cooling and bringing the operating temperature of the drive motor 10 back to the standard range.

[0068] If the temperature of the well water in the deep well is within the normal temperature range, and the motor temperature sensor 90 detects that the operating temperature of the drive motor 10 is within or below the standard range for a long time, the booster pump 60 can be turned off. There is no need to pump cooling water into the cooling chamber 41. Instead, the drive motor 10 can be kept cool and operate stably by relying on passive heat dissipation.

[0069] Preferably, in the embodiment, the driving motor 10 is an oil-filled underwater motor.

[0070] The oil-filled underwater motor has good sealing property, and can keep stable working state when being placed in a deep well or the cooling cavity 41. Embodiment

[0071] As shown in Figure 6 , 7 , it is a high-temperature-resistant deep-well submersible pump according to the second embodiment of the utility model, which is different from the first embodiment in that the driving motor 10 is a water-line motor.

[0072] The water-line motor can be directly placed in water to contact water for working, and therefore, the scheme of the embodiment can be replaced by canceling the cooling jacket 40 so that the machine shell 11 is directly exposed to deep-well water.

[0073] The machine shell 11 has a stator 113 and a rotor 114 formed by a coil, the rotor 114 is integrally connected with the output shaft 12 at the top, the flow gap 115 for water flow is formed between the rotor 114 and the stator 113, the water inlet 111 communicating with the flow gap 115 is formed at the bottom of the machine shell 11, the water outlet 112 communicating with the flow gap 115 is formed at the top of the machine shell 11, and the cooling pipe 50 is directly connected with the water inlet 111 of the machine shell 11.

[0074] Therefore, by using the water-line motor, the cooling pipe 50 can be directly connected with the flow gap 115 inside the machine shell 11, so that the cooling water is directly poured into the flow gap 115 for cooling, and finally flows into the deep well along the water outlet 112 and mixes with well water.

[0075] Compared with the scheme of the first embodiment, the scheme can save water source and achieve the same cooling effect, so that the driving motor 10 can keep good working state for a long time and the service life is sufficiently prolonged.

[0076] It is worth mentioning that in the scheme of the embodiment, the cooling water in the cooling pipe 50 needs to be filtered to remove impurities to avoid affecting the normal work of the driving motor 10.

[0077] The utility model has the advantages of the following:

[0078] This invention uses a cooling sleeve 40 to confine the housing 11 of the drive motor 10 within a certain range of a cooling chamber 41. External cooling water is pumped into the cooling chamber 41 through a cooling pipe 50 to dissipate heat from the housing 11 of the drive motor 10. On the one hand, this can relatively isolate the high temperature of the deep well water from directly acting on the housing 11 of the drive motor 10, preventing it from heating up too quickly. On the other hand, by limiting the effective range of the cooling water, the amount of cooling water used can be greatly reduced. The cooling effect of the prior art can be achieved with a smaller amount of cooling water, thereby significantly extending the service life of the deep well submersible pump.

[0079] Meanwhile, based on the temperature feedback of the drive motor 10, the input state of the cooling water can be controlled according to its temperature change. Compared with the existing cooling solution, there is no need to continuously pump cooling water, thus avoiding the waste of cooling water and electricity.

[0080] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A high-temperature resistant deep-well submersible pump, comprising, from bottom to top, a driving motor (10) including a motor casing (11) and an output shaft (12), a submersible pump body (20) including a pump casing (21) and a fan (22) disposed in the pump casing (21) and drivingly connected to the output shaft (12), a water-lifting channel being formed between the pump casing (21) and the fan (22), and a water inlet (23) being formed between the output shaft (12) and the pump casing (21) and communicating with the water-lifting channel, and a water-lifting pipe (30) communicating with the water-lifting channel and used for conveying deep-well water to the ground, characterized in that it further comprises a cooling jacket (40) having a cooling cavity (41) with an open upper end, the motor casing (11) of the driving motor (10) being disposed in the cooling cavity (41), and a cooling pipe (50) connected to an external water supply unit and used for pumping cooling water into the cooling cavity (41). The cooling jacket (40) is in the shape of a long tube with an open upper end, and the inner diameter of the cooling cavity (41) is greater than the outer diameter of the motor casing (11) to form a gap (42) for the outflow of cooling water and the penetration of the cooling pipe (50). The cooling pipe (50) includes a stainless steel pipe (51) and a PPR pipe (52), the stainless steel pipe (51) being attached to the water-lifting pipe (30) and the submersible pump body (20) and extending downward, and the PPR pipe (52) being connected to the stainless steel pipe (51) by a joint to penetrate into the gap (42) and enter the cooling cavity (41). The cooling pipe (50) is provided with at least two. The end of the cooling pipe (50) extends to the bottom of the cooling cavity (41). The end of the cooling pipe (50) is provided with a water distributor (70), and the surface of the water distributor (70) is provided with a plurality of water distribution holes (71) communicating with the cooling pipe (50). The water supply unit includes a cooling water supply unit and a booster pump (60), the input end of the booster pump (60) being connected to the water supply unit and the output end thereof being connected to the cooling pipe (50).

2. A high temperature resistant deep well submersible pump as claimed in claim 1, wherein, The control box (80) is electrically connected to the driving motor (10).

3. A high temperature resistant deep well submersible pump as claimed in claim 2, wherein, The driving motor (10) is an oil-filled underwater motor or a surface-piercing motor.

4. A high temperature resistant deep well submersible pump as claimed in claim 1 wherein, The driving motor (10) is a surface-piercing motor, the motor casing (11) of which is directly exposed to deep-well water, and the motor casing (11) has a stator (113) formed by a coil and a rotor (114) formed by the output shaft (12), a flow gap (115) being formed between the rotor (114) and the stator (113), the surface of the motor casing (11) being formed with a water injection port (111) and a water discharge port (112) in the region where the flow gap (115) is located, and the cooling pipe (50) being directly connected to the water injection port (111) on the motor casing (11).

5. A high temperature resistant deep well submersible pump as claimed in claim 1 wherein, ​ 6. A high temperature resistant deep well submersible pump as claimed in claim 1 wherein, ​ 7. A high temperature resistant deep well submersible pump as claimed in claim 1 wherein, ​ 8. A high temperature resistant deep well submersible pump as claimed in claim 7, wherein, ​ 9. A high temperature resistant deep-well submersible pump according to any one of claims 1 to 8, characterized in that, ​ 10. A high temperature resistant deep well submersible pump as claimed in claim 9, wherein, ​

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