Adjustable impeller guide wheel and electric submersible pump

Abstract

The utility model provides an adjustable impeller guide wheel and an electric submersible pump, the impeller guide wheel comprises a guide shell and an impeller, and the impeller comprises a bottom plate, a top plate and a plurality of blades; wherein the bottom plate is provided with a connecting shaft part and a mounting hole penetrating through the connecting shaft part and the bottom plate; the top plate is connected with the bottom plate through a plurality of groups of locking structures, and a flow guide hole coaxial with the connecting shaft part is formed in the top plate; the multiple blades are arranged between the top plate and the bottom plate, the extending end of each blade is rotationally connected with the bottom plate through a radial adjusting structure, and an angle adjusting structure is further arranged between each blade and the top plate so as to connect the top plate, the bottom plate and the blades and fix the positions and angles of the blades. The electric submersible pump comprises the impeller guide wheel, and the impeller guide wheel and the electric submersible pump have the same beneficial effects. According to the adjustable impeller guide wheel and the electric submersible pump, the state of the blades can be changed by adjusting the radial adjusting structure and the angle adjusting structure, so that the impeller guide wheel does not need to be disassembled and assembled, and the working efficiency of the electric submersible pump under different flow speed requirements is improved.

Description

Technical Field

[0001] This application belongs to the technical field of mechanical oil production equipment, and particularly relates to an adjustable vane guide wheel and a submersible electric pump. Background Art

[0002] A submersible electric pump, also known as an electric submersible pump or a submerged submersible electric centrifugal pump, is a rodless oil pump applied in the field of mechanical oil production. The vane guide wheel in the related technology is an important component that can generate suction and pressure. It has good structural strength and relatively convenient maintenance means to cope with the structural pressure brought by the flow rate and achieve timely repair when components are damaged, ensuring long-term continuous operation.

[0003] The common vane guide wheel structure in the prior art includes an impeller and a guide housing. During actual use, the built-in motor of the submersible electric pump drives the impeller to rotate at a high speed in the guide housing, so that the fluid at the impeller (under the action of centrifugal force) is thrown to the periphery of the impeller through the impeller flow channel, thereby increasing the liquid velocity. Among them, the angle between the blades of the impeller and the flow channel will directly affect the flow velocity of the liquid. Usually, the vane guide wheels are classified according to the difference in the aforementioned angle, so as to correspond to vane guide wheel products with different liquid flow velocities.

[0004] The inventor found that during the use of the submersible electric pump, it is necessary to replace the vane guide wheel according to the required flow velocity of the budget. However, the process of disassembling and assembling the vane guide wheel is relatively complicated, reducing the use efficiency of the submersible electric pump and the stability of the mechanical oil production work. Summary of the Utility Model

[0005] The embodiments of this application provide an adjustable vane guide wheel and a submersible electric pump, aiming to eliminate the process of disassembling and assembling the vane guide wheel and improve the working efficiency of the submersible electric pump under different flow velocity requirements.

[0006] To achieve the above object, the technical solution adopted in this application is:

[0007] Provide an adjustable vane guide wheel, including a guide housing for installation in a flow channel, and an impeller disposed in the guide housing and in clearance fit with the guide housing; the impeller includes:

[0008] A bottom plate having a coupling portion extending upward and an installation hole penetrating from the extending end surface of the coupling portion to the lower side surface of the bottom plate; the installation hole is for the main shaft of the built-in motor in the submersible electric pump to pass through, so that the main shaft is in contact with the inner wall of the installation hole and the main shaft and the bottom plate rotate synchronously;

[0009] A top plate is arranged above the bottom plate, and the top plate is connected to the bottom plate through several sets of locking structures; a diversion hole coaxially arranged with the coupling part is formed on the top plate, and the diversion hole is used for the main shaft to pass through, so as to form an annular gap between the main shaft and the diversion hole; and

[0010] A plurality of blades are arranged between the top plate and the bottom plate, and the plurality of blades are arranged at intervals around the coupling part; each blade extends radially outward along the coupling part, is adapted to move radially along the coupling part, and the extending end of each blade is rotationally connected to the bottom plate in the vertical direction through a radial adjustment structure;

[0011] Wherein, an angle adjustment structure is further arranged between each blade and the top plate; the angle adjustment structure is used for connecting the blade and the top plate to limit the swing of the blade.

[0012] In a possible implementation manner, when the blade is connected to the bottom plate through the radial adjustment structure and connected to the top plate through the angle adjustment structure, the upper and lower sides of each blade respectively abut against the top plate and the bottom plate to limit the top plate and the bottom plate from moving towards each other; the locking structure includes:

[0013] An upper positioning hole is formed on the top plate, and its axis is parallel to the vertical direction;

[0014] A lower positioning hole is formed on the bottom plate, and it is coaxially arranged with the upper positioning hole; and

[0015] A locking screw is inserted into the mutually communicated upper positioning hole and the lower positioning hole, and its upper and lower ends respectively extend to the upper side of the top plate and the lower side of the bottom plate, and stop nuts are respectively screwed on both ends of the locking screw;

[0016] Wherein, the two stop nuts are adapted to respectively abut against the upper side surface of the top plate and the lower side surface of the bottom plate to limit the top plate and the bottom plate from moving away from each other; and, the locking screw is arranged to avoid the blade.

[0017] In a possible implementation manner, a diversion shaft sleeve is sleeved on the locking screw; the diversion shaft sleeve is adapted to rotate around the locking screw, and the upper and lower ends of the diversion shaft sleeve respectively abut against the top plate and the bottom plate.

[0018] In a possible implementation manner, when the upper and lower sides of the blade respectively abut against the top plate and the bottom plate, the coupling part passes through the diversion hole from bottom to top and extends out, and an annular gap is formed between the coupling part and the diversion hole.

[0019] In a possible implementation, the radial adjustment structure includes:

[0020] A plurality of jacks are all opened on the bottom plate and are arranged at intervals along the radial direction of the bottom plate;

[0021] A fixing screw is fixedly connected to the blade, is adapted to pass through any one of the jacks and extend out, and a connection nut is threadedly connected to the extending end of the fixing screw.

[0022] In a possible implementation, the lower side surface of the bottom plate has a plurality of strengthening arms corresponding to the plurality of blades one by one; wherein, each strengthening arm is slidably connected to the bottom plate along the radial direction of the bottom plate, and a through hole adapted to communicate with any one of the jacks and adapted to allow the fixing screw to pass through is opened on each strengthening arm.

[0023] In a possible implementation, the angle adjustment structure includes:

[0024] A positioning nut is fixedly connected to the upper side surface of the blade, and its axis is parallel to the up-down direction;

[0025] A plurality of groups of alignment holes are arranged at intervals along the radial direction of the top plate, and each group of alignment holes includes a plurality of the alignment holes; wherein, the plurality of alignment holes are arranged at intervals around the rotation axis of the bottom plate and the blade, and are all adapted to communicate coaxially with the positioning nut; and

[0026] A docking bolt is adapted to be inserted into any one of the alignment holes, and the docking bolt is also adapted to be threadedly connected to the positioning nut.

[0027] In a possible implementation, a sinking groove adapted to allow the positioning nut to be embedded is opened on the upper side surface of the blade, and a reserved groove adapted to allow the docking bolt to be inserted is opened at the bottom of the sinking groove.

[0028] In a possible implementation, a cover adapted to be buckled on the upper side of the alignment hole is provided on the upper side of the top plate.

[0029] In the embodiment of the present application, the top plate and the bottom plate can be connected through a locking structure, and at the same time, the bottom plate and the blade are connected through a radial adjustment structure, and the top plate and the blade are connected through an angle adjustment structure to realize the fixation of the top plate, the blade and the bottom plate; when adjustment is required, only the radial adjustment structure and the angle adjustment structure need to be adjusted, and there is no need to remove the impeller guide.

[0030] Compared with the prior art, the adjustable impeller guide provided in this embodiment can change the state of the blade by adjusting the radial adjustment structure and the angle adjustment structure, thereby eliminating the need to disassemble and assemble the impeller guide and improving the working efficiency of the submersible electric pump under different flow rate requirements.

[0031] The technical solution adopted in this application also provides a submersible electric pump, including the adjustable vane guide wheel proposed in any one of the foregoing.

[0032] The beneficial effects of the submersible electric pump provided in this embodiment are the same as those of the foregoing adjustable vane guide wheel, and will not be elaborated here. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 One of the three-dimensional structure diagrams of the adjustable vane guide wheel provided for the embodiment of this application;

[0035] Figure 2 Another three-dimensional structure diagram of the adjustable vane guide wheel provided for the embodiment of this application;

[0036] Figure 3 The exploded structure diagram of the adjustable vane guide wheel provided for the embodiment of this application;

[0037] Figure 4 The cross-sectional structure diagram of the bottom plate and the reinforcing arm adopted in the embodiment of this application in the combined state;

[0038] Figure 5 The partial enlarged view of the radial adjustment structure adopted in the embodiment of this application from the exploded perspective;

[0039] Figure 6 The exploded structure diagram of the locking structure adopted in the embodiment of this application;

[0040] Figure 7 The exploded structure diagram of the angle adjustment structure adopted in the embodiment of this application;

[0041] Figure 8 The cross-sectional structure diagram of the blade and the positioning nut adopted in the embodiment of this application from the exploded perspective;

[0042] Description of reference numerals: 1, bottom plate; 11, coupling part; 12, mounting hole; 13, reinforcing arm; 131, through hole; 2, top plate; 21, diversion hole; 22, retaining cover; 3, blade; 31, sinking groove; 32, reserved groove; 4, locking structure; 41, upper positioning hole; 42, lower positioning hole; 43, locking screw; 431, stop nut; 432, diversion bushing; 5, radial adjustment structure; 51, jack; 52, fixing screw; 521, connecting nut; 6, angle adjustment structure; 61, positioning nut; 62, alignment hole; 63, docking bolt; 100, main shaft. Detailed implementation manners

[0043] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0045] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0046] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0047] Please refer to Figures 1 to 8 , and now the adjustable vane guide wheel provided by the present application will be described. The adjustable vane guide wheel proposed by the present application includes a guide housing and an impeller; wherein, the guide housing is used for being installed in the flow channel of the downhole part of the submersible electric pump; the impeller is installed inside the guide housing and is in clearance fit with it.

[0048] In this embodiment, the impeller includes a bottom plate 1, a top plate 2, and a plurality of blades 3; both the bottom plate 1 and the top plate 2 adopt a plate structure with a circular cross-section, and the cross-sectional areas of the two circular sections are equal.

[0049] The bottom plate 1 has a coupling portion 11 extending upward, and a mounting hole 12 penetrating from the extending end surface of the coupling portion 11 to the lower side surface of the bottom plate 1; during actual use, this mounting hole 12 is used for the main shaft 100 of the built-in motor in the submersible electric pump to pass through (in this embodiment, this mounting hole 12 is a special-shaped hole, and the cross-section of the main shaft 100 is adapted to the cross-section of the mounting hole 12), so as to synchronize the rotation of the main shaft 100 and the bottom plate 1 (by the way of the outer wall of the main shaft 100 abutting against the inner wall of the mounting hole 12).

[0050] The top plate 2 is arranged above the bottom plate 1, and the top plate 2 is connected to the bottom plate 1 through several groups of locking structures 4 to limit the relative movement between the bottom plate 1 and the top plate 2; on this basis, the top plate 2 also has a diversion hole 21 coaxially arranged with the coupling portion 11, and this diversion hole 21 is used for the main shaft 100 to pass through, so as to form an annular gap for fluid to pass through between the main shaft 100 and the diversion hole 21.

[0051] A plurality of blades 3 are arranged between the top plate 2 and the bottom plate 1, and the plurality of blades 3 are arranged at intervals around the coupling portion 11; among them, each blade 3 extends radially outward along the coupling portion 11 and is adapted to move radially along the coupling portion 11, and the extending end of each blade 3 is rotationally connected to the bottom plate 1 in the up and down direction through a radial adjustment structure 5; that is to say, after the radial adjustment structure 5 is released, the blade 3 can move towards or away from the coupling portion 11 to change the relative position of the blade 3 relative to the top plate 2 and the bottom plate 1; after the position of the blade 3 is adjusted, the blade 3 and the bottom plate 1 can be connected through the radial adjustment structure 5 to limit the movement of the blade 3. It should be noted that when the radial adjustment structure 5 connects the blade 3 and the bottom plate 1, the blade 3 can still swing relative to the bottom plate 1.

[0052] In this embodiment, there is also an angle adjustment structure 6 between each blade 3 and the top plate 2; this angle adjustment structure 6 is used to connect the blade 3 and the top plate 2 to limit the swing of the blade 3.

[0053] In the embodiment of the present application, the top plate 2, the blade 3, and the bottom plate 1 can be fixed by connecting the top plate 2 and the bottom plate 1 through the locking structure 4, connecting the bottom plate 1 and the blade 3 through the radial adjustment structure 5, and connecting the top plate 2 and the blade 3 through the angle adjustment structure 6; when adjustment is required, only the radial adjustment structure 5 and the angle adjustment structure 6 need to be adjusted, and there is no need to remove the impeller guide wheel.

[0054] Compared with the prior art, the adjustable vane guide wheel provided in this embodiment can change the state of the vane 3 by adjusting the radial adjustment structure 5 and the angle adjustment structure 6, thus eliminating the need to disassemble and assemble the vane guide wheel and improving the working efficiency of the submersible electric pump under different flow rate requirements.

[0055] In some embodiments, as Figure 6 shown, when the vane 3 is connected to the bottom plate 1 through the radial adjustment structure 5 and connected to the top plate 2 through the angle adjustment structure 6, the upper and lower sides of each vane 3 respectively abut against the top plate 2 and the bottom plate 1 to limit the opposite movement of the top plate 2 and the bottom plate 1; that is to say, the locking structure 4 only needs to limit the back-to-back movement and parallel movement of the top plate 2 and the bottom plate 1 to achieve the locking effect.

[0056] Based on this, in this embodiment, the locking structure 4 includes an upper positioning hole 41, a lower positioning hole 42 and a locking screw 43.

[0057] The upper positioning hole 41 is opened on the top plate 2. The upper positioning hole 41 penetrates along the thickness direction of the top plate 2, and the axis of the upper positioning hole 41 is parallel to the up and down direction.

[0058] The lower positioning hole 42 is opened on the bottom plate 1. The lower positioning hole 42 penetrates along the thickness direction of the bottom plate 1; and after the top plate 2 and the bottom plate 1 are mutually positioned, the lower positioning hole 42 is coaxially arranged with the upper positioning hole 41.

[0059] The locking screw 43 is inserted into the mutually connected upper positioning hole 41 and lower positioning hole 42. Its upper and lower ends respectively extend to the upper side of the top plate 2 and the lower side of the bottom plate 1, and a stop nut 431 is threadedly connected to both ends of the locking screw 43.

[0060] It should be added that each locking screw 43 is arranged to avoid the vane 3 to ensure the normal use and position and angle adjustment of the vane 3.

[0061] By adopting the above technical solution, the two stop nuts 431 are adapted to respectively abut against the upper side surface of the top plate 2 and the lower side surface of the bottom plate 1 to limit the back-to-back movement of the top plate 2 and the bottom plate 1 and the relative movement of the top plate 2 and the bottom plate 1 in the horizontal direction (the radial direction of the top plate 2 and the bottom plate 1).

[0062] In some embodiments, as Figure 6 shown, a diversion bushing 432 is sleeved on the locking screw 43; this diversion bushing 432 is adapted to rotate with the locking screw 43 as the axis, so as to ensure the passage of fluid and avoid the structural damage caused by the fluid hitting the locking screw 43. And the upper and lower ends of this diversion bushing 432 respectively abut against the top plate 2 and the bottom plate 1 to assist the vane 3 to limit the opposite movement of the top plate 2 and the bottom plate 1.

[0063] In some embodiments, as Figure 1 andFigure 3 As shown, when the upper and lower sides of the blade 3 are respectively abutted against the top plate 2 and the bottom plate 1, the coupling portion 11 extends upward through the diversion hole 21 from bottom to top, and an annular gap is formed between the coupling portion 11 and the diversion hole 21.

[0064] By adopting the above technical solution, when the coupling portion 11 extends through the diversion hole 21, the length limitation of the coupling portion 11 can be released, and the contact area between the coupling portion 11 and the main shaft 100 can be increased, thereby improving the connection stability between this component and the main shaft 100; at the same time, between adjacent blade guide wheels, the lower side surface of the bottom plate 1 corresponding to one blade guide wheel abuts against the extended end surface of the coupling portion 11 corresponding to the other blade guide wheel, so as to realize the spaced fixation of the two blade guide wheels.

[0065] In some embodiments, as Figure 4 and Figure 5 shown, the radial adjustment structure 5 includes a plurality of jacks 51 and fixing screws 52.

[0066] The plurality of jacks 51 are all opened on the bottom plate 1, and are arranged at intervals along the radial direction of the bottom plate 1.

[0067] The fixing screw 52 is fixedly connected to the blade 3, and is adapted to pass through any one of the jacks 51 and extend out, and a connection nut 521 is threadedly connected to the extended end of the fixing screw 52.

[0068] During actual use, the connection nut 521 can abut against the lower side surface of the bottom plate 1 to limit the movement of the blade 3 away from the bottom plate 1, realize the rotational connection between the blade 3 and the bottom plate 1, and improve the structural stability of this device at the same time.

[0069] In some embodiments, as Figure 2 and Figure 5 shown, the lower side surface of the bottom plate 1 has a plurality of reinforcing arms 13 corresponding to the plurality of blades 3 one by one; wherein, each reinforcing arm 13 is slidably connected to the bottom plate 1, the sliding connection direction is parallel to the length direction of the reinforcing arm 13, and the length direction of the reinforcing arm 13 is perpendicular to the thickness direction of the bottom plate 1.

[0070] Each reinforcing arm 13 is provided with a through hole 131 adapted to communicate with any one of the jacks 51 and adapted to allow the fixing screw 52 to pass through; after the fixing screw 52 passes through the through hole 131, the connection nut 521 can abut against the lower side surface of the reinforcing arm 13, so as to abut against the lower side surface of the bottom plate 1 by abutting against the reinforcing arm 13, thereby realizing the structural damage caused by the arrangement of the jacks 51 and enhancing the structural strength of the bottom plate 1.

[0071] In some embodiments, as Figure 7 shown, the angle adjustment structure 6 includes a positioning nut 61, a plurality of pairs of alignment holes 62 and a docking bolt 63.

[0072] The positioning nut 61 is fixedly connected to the upper side surface of the blade 3, and its axis is parallel to the up and down direction.

[0073] Multiple groups of alignment holes 62 are arranged at intervals along the radial direction of the top plate 2 to correspond to different radial positions of the blade 3; in this embodiment, each group of alignment holes 62 includes a plurality of alignment holes 62, and the plurality of alignment holes 62 are arranged at intervals around the rotation axis of the bottom plate 1 and the blade 3 and are all adapted to be coaxially communicated with the positioning nut 61.

[0074] The docking bolt 63 is adapted to be inserted into any one of the alignment holes 62, and the docking bolt 63 is also adapted to be threadedly connected to the positioning nut 61.

[0075] By adopting the above technical solution, with the cooperation of multiple groups of alignment holes 62, the positioning connection of the blade 3 at different radial positions can be realized, ensuring the restriction of the swing of the blade 3.

[0076] In some embodiments, as Figure 8 shown, a sinking groove 31 adapted for the positioning nut 61 to be embedded is formed on the upper side surface of the blade 3, and a reserved groove 32 adapted for the docking bolt 63 to be inserted is formed at the bottom of the sinking groove 31; after connecting the docking bolt 63 with the positioning nut 61, the docking bolt 63 can be inserted into the reserved groove 32 by screwing the docking bolt 63 to ensure a sufficient and effective connection between the positioning nut 61 and the docking bolt 63.

[0077] In some embodiments, as Figure 1 and Figure 3 shown, the upper side of the top plate 2 has a cover 22 adapted to be buckled on the upper side of the alignment hole 62; through this cover 22, fluid can be prevented from entering the space between the top plate 2 and the bottom plate 1 through the alignment hole 62, ensuring that the fluid mainly enters the space between the top plate 2 and the bottom plate 1 from the annular gap inside the diversion hole 21.

[0078] Based on the same inventive concept, the embodiment of the present application also provides a submersible electric pump, including the adjustable vane guide wheel proposed in any one of the foregoing.

[0079] The beneficial effects of the submersible electric pump provided in this embodiment are the same as those of the foregoing adjustable vane guide wheel, and will not be elaborated here.

[0080] The above content is only the preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An adjustable impeller guide wheel, comprising a guide housing for installation in a flow channel, and an impeller arranged in the guide housing and having a clearance fit with the guide housing; characterized in that: The impeller comprises: The bottom plate has a connecting shaft portion extending upward, and a mounting hole extending from the extending end surface of the connecting shaft portion to the lower side surface of the bottom plate; the mounting hole is used for the main shaft of the built-in motor in the submersible electric pump to pass through, so that the main shaft is connected to the inner wall of the mounting hole, and the main shaft and the bottom plate rotate synchronously; A top plate is arranged above the bottom plate, and the top plate is connected to the bottom plate through a plurality of locking structures; the top plate has a guide hole coaxially arranged with the connecting shaft, and the guide hole is used for the main shaft to pass through, so that an annular gap is formed between the main shaft and the guide hole; and A plurality of blades are arranged between the top plate and the bottom plate, and the plurality of blades are arranged around the coupling portion at intervals; each blade extends radially outwardly along the coupling portion and is suitable for moving radially along the coupling portion, and an extended end of each blade is connected to the bottom plate for rotation in an up-and-down direction via a radial adjustment structure; There is an angle adjustment structure between each of the blades and the top plate; the angle adjustment structure is used to connect the blades and the top plate to limit the swing of the blades.

2. The adjustable impeller guide wheel according to claim 1, characterized in that: When the blade is connected to the bottom plate through the radial adjustment structure and connected to the top plate through the angle adjustment structure, the upper and lower sides of each blade abut against the top plate and the bottom plate respectively to limit the top plate and the bottom plate from moving toward each other; the locking structure includes: An upper positioning hole is provided on the top plate, and its axial direction is parallel to the up-down direction; a lower positioning hole, which is formed on the bottom plate and is coaxially arranged with the upper positioning hole; and A locking screw is inserted into the upper positioning hole and the lower positioning hole which are connected to each other, and its upper and lower ends extend to the upper side of the top plate and the lower side of the bottom plate respectively, and both ends of the locking screw are threadedly connected with a stop nut; The two stop nuts are suitable for respectively abutting against the upper side of the top plate and the lower side of the bottom plate to limit the back movement of the top plate and the bottom plate; and the locking screw is arranged to avoid the blade.

3. The adjustable impeller guide wheel according to claim 2, characterized in that: A guide sleeve is sleeved on the locking screw; the guide sleeve is suitable for rotating with the locking screw as the axis, and the upper and lower ends of the guide sleeve are respectively against the top plate and the bottom plate.

4. The adjustable impeller guide wheel according to claim 2, characterized in that: When the upper and lower sides of the blade respectively abut against the top plate and the bottom plate, the connecting shaft portion passes through the guide hole from bottom to top and extends out, and an annular gap is formed between the connecting shaft portion and the guide hole.

5. The adjustable impeller guide wheel according to claim 1, characterized in that: The radial adjustment structure comprises: A plurality of jacks are provided on the bottom plate and are arranged at intervals along the radial direction of the bottom plate; A fixing screw is fixedly connected to the blades and is suitable for passing through any one of the insertion holes and extending out, and a connecting nut is threadedly connected to the extending end of the fixing screw.

6. The adjustable impeller guide wheel according to claim 5, characterized in that: The lower side of the base plate has a plurality of reinforcing arms corresponding one by one to the plurality of blades; wherein each of the reinforcing arms is slidably connected to the base plate along the radial direction of the base plate, and each of the reinforcing arms is provided with a through hole suitable for connecting with any one of the sockets and for the fixing screw to pass through.

7. The adjustable impeller according to any one of claims 1 to 6, characterized in that: The angle adjustment structure comprises: A positioning nut, fixedly connected to the upper side of the blade, with its axial direction parallel to the up-down direction; A plurality of groups of alignment holes are arranged at intervals along the radial direction of the top plate, and each group of alignment holes includes a plurality of alignment holes; wherein the plurality of alignment holes are arranged at intervals around the bottom plate and the rotation axis of the blade, and are all suitable for being coaxially connected to the positioning nut; and The butt bolt is suitable for being inserted into any one of the alignment holes, and the butt bolt is also suitable for being threadedly connected with the positioning nut.

8. The adjustable impeller guide wheel according to claim 7, characterized in that: The upper side surface of the blade is provided with a sinking groove suitable for the positioning nut to be embedded, and the bottom of the sinking groove is provided with a reserved groove suitable for the butt bolt to be inserted.

9. The adjustable impeller guide wheel according to claim 7, characterized in that: The upper side of the top plate is provided with a blocking cover which is suitable for buckling on the upper side of the alignment hole.

10. A submersible electric pump, characterized in that: The invention comprises the adjustable impeller according to any one of claims 1 to 9.

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