Well submersible electric pump provided with split type delivery chamber

Abstract

The utility model belongs to the technical field of submersible electric pumps, and particularly relates to a well submersible electric pump provided with a split type delivery chamber, which comprises a motor, the motor drives a pump shaft in a pump cylinder to rotate through a coupler, a plurality of impellers rotating along with the shaft are mounted on the pump shaft, the impellers rotating at high speed pressurize a medium, and guide vanes are arranged to reduce the liquid flow speed. The speed energy is converted into pressure energy, liquid flowing out of an impeller outlet is collected and stably conveyed to an inlet of a next-stage impeller or a split type delivery chamber, the guide vane cover plate supports the guide vanes, it is ensured that the guide vanes are kept stable and do not deform or displace under the impact of high-speed water flow, the split type delivery chamber is arranged, the flow channel arrangement can be optimized, and the service life of the guide vanes is prolonged. The energy loss of fluid in the flowing process is reduced, so that the hydraulic efficiency of the pump is improved, when the delivery chamber is damaged or needs to be replaced, the split type design enables the maintenance work to be simpler, more convenient and faster, and the maintenance cost and time are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of submersible motor pumps, and particularly relates to a submersible motor pump for wells with a split volute chamber. Background Art

[0002] A submersible motor pump for wells is a pump that is immersed in a groundwater well for pumping and transporting water, and is widely used in farmland drainage and irrigation, industrial and mining enterprises, urban water supply and drainage, etc. A common submersible motor pump for wells generally consists of a motor and a pump barrel. One end of the pump barrel is provided with a motor, and multiple impellers are arranged inside the pump barrel. The impeller is an energy conversion device of a centrifugal pump, and its function is to collect the liquid thrown out by the impeller, reduce the flow rate of the liquid, convert part of the velocity energy head into pressure energy head, and then evenly introduce it into the next stage or discharge it through a diffuser pipe.

[0003] The existing submersible motor pumps for wells are usually of an integrated design, and the volute chamber part is directly fixedly connected to the pump barrel, making it difficult to disassemble and maintain. Moreover, during long-term use, due to the aging or wear of the seals, water leakage problems are likely to occur, affecting the service life and efficiency of the pump. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a submersible motor pump for wells with a split volute chamber in view of the above existing technical problems, so as to solve the problems put forward in the above background art.

[0005] In view of this, the utility model provides a submersible motor pump for wells with a split volute chamber, which includes a motor. The motor is detachably and fixedly connected to the water inlet section, and the water inlet section is detachably and fixedly connected to the pump barrel. The motor drives the pump shaft inside the pump barrel to rotate through a coupling. Multiple impellers that rotate with the shaft are installed on the pump shaft. A guide vane whose position and shape are both adapted to the impeller is fitted on the inner wall of the pump barrel. A plurality of guide vane covers for supporting the guide vane are arranged inside the pump barrel;

[0006] A split volute chamber, and a split volute chamber is detachably and fixedly connected to the end of the pump barrel far from the motor.

[0007] In the above technical solution, further, the split volute chamber includes:

[0008] An inner volute chamber, and the inner volute chamber is integrally installed inside the pump barrel;

[0009] An outer volute chamber, and the outer volute chamber is axially installed outside the pump barrel and nested with the inner volute chamber.

[0010] In the above technical solution, further, the split volute chamber further includes:

[0011] A rubber sealing ring, and a rubber sealing ring is arranged between the outer volute chamber and the inner volute chamber.

[0012] In the above technical solution, further, the tension pin passes through the positioning hole formed in the pump barrel in the circumferential direction of the pump barrel and is installed in the positioning pin hole formed in the inner pressure chamber. The tension bolt axially passes through the inner pressure chamber from the outer surface of the outer pressure chamber, is fixed to the tension pin by threads, and axially tensions the inner pressure chamber and the outer pressure chamber through the thread tightening force, and axially pushes the integral split pressure chamber into the pump barrel.

[0013] In the above technical solution, further, a pressure chamber gasket is arranged in the pump barrel, and it is located between the inner pressure chamber and one guide vane cover plate closest to the inner pressure chamber.

[0014] In the above technical solution, further, a rubber bearing is arranged between the inner pressure chamber and the pump shaft.

[0015] In the above technical solution, further, a rubber gasket is arranged between the inner pressure chamber and the pump barrel.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. The setting of the split pressure chamber can optimize the flow path setting, reduce the energy loss of the fluid during the flow process, thereby improving the hydraulic efficiency of the pump. The split pressure chamber can be flexibly configured and adjusted according to different working conditions to ensure the stable operation of the pump. When the pressure chamber is damaged or needs to be replaced, the split design makes the maintenance work simpler and faster, reducing the maintenance cost and time.

[0018] 2. The outer pressure chamber and the inner pressure chamber are sealed with a rubber sealing ring to prevent the leakage of the flowing medium.

[0019] 3. Through the threaded fixation of the tension pin and the tension bolt, and axially tensioning the inner pressure chamber and the outer pressure chamber through the thread tightening force, and axially pushing the integral split pressure chamber into the pump barrel, thereby pressing the components such as the guide parts in the pump barrel and improving the stability of the pump barrel structure. Description of the Drawings

[0020] Figure 1 is a structural schematic diagram of the present utility model;

[0021] The markings in the figure are shown as: 1 - motor, 2 - water inlet section, 3 - pump barrel, 4 - coupling, 5 - pump shaft, 6 - impeller, 7 - guide vane, 8 - guide vane cover plate, 9 - split pressure chamber, 10 - inner pressure chamber, 11 - outer pressure chamber, 12 - rubber sealing ring, 13 - tension pin, 14 - positioning hole, 15 - positioning pin shaft, 16 - tension bolt, 17 - pressure chamber gasket, 18 - rubber bearing, 19 - rubber gasket. Detailed Embodiments

[0022] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0023] Embodiment 1:

[0024] This embodiment provides a submersible motor pump for wells with a split volute chamber, including:

[0025] A motor 1, the motor 1 is detachably and fixedly connected to the water inlet section 2, the water inlet section 2 is detachably and fixedly connected to the pump barrel 3, the motor 1 drives the pump shaft 5 in the pump barrel 3 to rotate through a coupling 4, a plurality of impellers 6 that rotate with the shaft are installed on the pump shaft 5, a guide vane 7 whose position and shape are both adapted to the impeller 6 is arranged in a fitting manner on the inner wall of the pump barrel 3, and a plurality of guide vane covers 8 for supporting the guide vane 7 are arranged in the pump barrel 3;

[0026] A split volute chamber 9, the split volute chamber 9 is detachably and fixedly connected to one end of the pump barrel 3 away from the motor 1.

[0027] As can be seen from this embodiment, when the submersible motor pump for wells works, it is immersed in water. The power supply is sent to the motor 1 through a waterproof cable. The motor 1 drives the pump shaft 5 of the pump barrel 3 to rotate through the coupling 4. A plurality of impellers 6 that rotate with the shaft are installed on the pump shaft 5. The high-speed rotating impellers 6 boost the medium. The arrangement of the guide vane 7 can reduce the liquid flow velocity and convert the velocity energy into pressure energy, collect the liquid flowing out of the outlet of the impeller 6, and smoothly transport it to the inlet of the next-stage impeller 6 or into the split volute chamber 9. The guide vane cover 9 provides support for the guide vane 7 to ensure that the guide vane 7 remains stable under the impact of high-speed water flow and does not deform or displace. A sealing structure is formed between the guide vane cover 8 and the guide vane 7, effectively preventing the liquid in the pump from leaking to the outside of the pump under high pressure, ensuring the sealing performance of the pump barrel 3. The guide vane cover 8 also plays a role in isolating different-stage impellers 6 and guide vanes 7, ensuring the orderly flow of water between stages. The pump barrel 3 fixes the guide vanes 7 and the guide vane covers 8 at all levels in the pump barrel 3 through components such as the water inlet section 2 and the split volute chamber 9, collects the medium boosted by the impellers 6 at all levels, and finally transports it to the pipeline through the split volute chamber 9. The arrangement of the split volute chamber 9 can optimize the flow channel setting, reduce the energy loss during the fluid flow process, thereby improving the hydraulic efficiency of the pump. The split volute chamber 9 can be flexibly configured and adjusted according to different working conditions to ensure the stable operation of the pump. When the volute chamber is damaged or needs to be replaced, the split design makes the maintenance work simpler and faster, reducing the maintenance cost and time.

[0028] Embodiment 2:

[0029] This embodiment provides a submersible motor pump for wells with a split volute chamber. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0030] The split volute chamber 9 includes:

[0031] An inner volute chamber 10, which is integrally installed in the pump barrel 3;

[0032] An outer volute chamber 11, which is axially installed outside the pump barrel 3 and nested with the inner volute chamber 10.

[0033] As can be seen from this embodiment, the outer volute chamber 11 is connected to the water delivery pipeline and needs to have a relatively high strength, and a metal material with relatively high strength can be selected; the inner volute chamber 10 is integrally installed in the pump barrel 3 and functions to fix the rubber bearing 18 and the tension pin 13, and the strength requirement is relatively low, and an engineering plastic material can be selected.

[0034] Embodiment 3:

[0035] This embodiment provides a submersible motor pump for wells with a split volute chamber. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0036] The split volute chamber 9 further includes:

[0037] A rubber sealing ring 12, and a rubber sealing ring 12 is arranged between the outer volute chamber 11 and the inner volute chamber 10.

[0038] As can be seen from this embodiment, the outer volute chamber 11 and the inner volute chamber 10 are sealed with a rubber sealing ring 12 to prevent the leakage of the flowing medium.

[0039] Embodiment 4:

[0040] This embodiment provides a submersible motor pump for wells with a split volute chamber. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0041] The tension pin 13 passes through the positioning hole 14 opened on the pump barrel 3 in the circumferential direction of the pump barrel 3 and is installed in the positioning pin hole 15 opened on the inner volute chamber 10. The tension bolt 16 axially passes through the inner volute chamber 10 from the outer surface of the outer volute chamber 11, is fixed to the tension pin 13 by threads, and axially tightens the inner volute chamber 10 and the outer volute chamber 11 through the thread tightening force, and axially pushes the whole split volute chamber 9 into the pump barrel 3.

[0042] As can be seen from this embodiment, through the threaded fixation of the tension pin 13 and the tension bolt 16, and axially tightening the inner volute chamber 10 and the outer volute chamber 11 through the thread tightening force, and axially pushing the whole split volute chamber 9 into the pump barrel 3, so as to compress the components such as the guide parts in the pump barrel 3 and improve the structural stability of the pump barrel 3.

[0043] Example 5:

[0044] This embodiment provides a submersible motor pump for wells with a split-type discharge chamber. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0045] A discharge chamber gasket 17 is arranged in the pump barrel 3, and it is located between the inner discharge chamber 10 and a guide vane cover plate 8 closest to the inner discharge chamber 10.

[0046] It can be seen from this embodiment that by setting discharge chamber gaskets 17 with different sizes to connect the inner discharge chamber 10 and the guide vane cover plate 8, it is possible to adapt to pump barrels 3 with different axial dimensions and prevent the internal structure of the pump barrel 3 from loosening due to excessive axial dimensions.

[0047] Example 6:

[0048] This embodiment provides a submersible motor pump for wells with a split-type discharge chamber. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0049] A rubber bearing 18 is arranged between the inner discharge chamber 10 and the pump shaft 5.

[0050] It can be seen from this embodiment that the rubber bearing 18 is provided to support the pump shaft 5.

[0051] Example 7:

[0052] This embodiment provides a submersible motor pump for wells with a split-type discharge chamber. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0053] A rubber gasket 19 is arranged between the inner discharge chamber 10 and the pump barrel 3.

[0054] It can be seen from this embodiment that by setting the rubber gasket 19, leakage of the flowing medium can be prevented.

[0055] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A submersible motor pump for wells with a split volute chamber, characterized in that, Comprising: A motor (1), the motor (1) is detachably and fixedly connected to the water inlet section (2), the water inlet section (2) is detachably and fixedly connected to the pump barrel (3), the motor (1) drives the pump shaft (5) in the pump barrel (3) to rotate through a coupling (4), a plurality of impellers (6) rotating with the shaft are installed on the pump shaft (5), guide vanes (7) with positions and shapes adapted to the impellers (6) are arranged in a fitting manner on the inner wall of the pump barrel (3), and a plurality of guide vane covers (8) for supporting the guide vanes (7) are arranged in the pump barrel (3); A split volute chamber (9), the split volute chamber (9) is detachably and fixedly connected to one end of the pump barrel (3) far from the motor (1).

2. The submersible motor pump for well use with a split volute chamber according to claim 1, characterized in that, The split volute chamber (9) includes: An inner volute chamber (10), the inner volute chamber (10) is integrally installed in the pump barrel (3); An outer volute chamber (11), the outer volute chamber (11) is axially installed outside the pump barrel (3) and nested with the inner volute chamber (10).

3. The submersible motor pump for well with a split-type pressure chamber according to claim 2, characterized in that, The split volute chamber (9) further includes: A rubber sealing ring (12), a rubber sealing ring (12) is arranged between the outer volute chamber (11) and the inner volute chamber (10).

4. The submersible motor pump for well use with a split-type discharge chamber according to claim 3, characterized in that, The tension pin (13) passes through a positioning hole (14) opened on the pump barrel (3) in the circumferential direction of the pump barrel (3) and is installed in a positioning pin hole (15) opened on the inner volute chamber (10). The tension bolt (16) axially passes through the inner volute chamber (10) from the outer surface of the outer volute chamber (11), is fixedly connected to the tension pin (13) through threads, and axially tightens the inner volute chamber (10) and the outer volute chamber (11) through the thread tightening force, and axially pushes the whole split volute chamber (9) into the pump barrel (3).

5. The submersible motor pump for well with a split volute chamber according to claim 4, wherein, A volute chamber gasket (17) is arranged in the pump barrel (3), and it is located between the inner volute chamber (10) and the guide vane cover (8) closest to the inner volute chamber (10).

6. The submersible motor pump for well with a split-type volute chamber according to claim 5, characterized in that, A rubber bearing (18) is arranged between the inner volute chamber (10) and the pump shaft (5).

7. The submersible motor pump for well with a split-type volute chamber according to claim 6, characterized in that, A rubber gasket (19) is arranged between the inner volute chamber (10) and the pump barrel (3).

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