Pump impeller structure

Abstract

The invention relates to the field of closed impellers, in particular to a pump impeller structure which comprises an upper cover plate and a lower cover plate, a plurality of upper impellers are fixedly connected to the bottom end of the upper cover plate in an array mode, a plurality of lower impellers are fixedly connected to the positions, corresponding to the upper impellers, of the top end of the lower cover plate in an array mode, and clamping mechanisms are arranged between the upper impellers and the lower impellers. The clamping mechanism comprises a plurality of first mounting grooves and a plurality of second mounting grooves, the first mounting grooves are formed in the bottom end of the upper impeller in an array mode along the track of the upper impeller, and the second mounting grooves are formed in the top end of the lower impeller in an array mode along the track of the lower impeller; according to the closed impeller, the upper inserting plate and the lower inserting plate are arranged, so that the closed impeller is convenient to assemble and disassemble, if the position of the impeller part is damaged, for example, the upper cover plate and the upper impeller or the lower cover plate and the lower impeller are damaged, the damaged position part can be replaced, and therefore loss is reduced.

Description

Technical Field

[0001] The invention relates to the field of closed impellers, and in particular to a pump impeller structure. Background Art

[0002] As a type of impeller, the closed impeller is a working part of a centrifugal pump. It relies on its high-speed rotation to do work on the liquid to achieve liquid transportation. It is one of the important parts of a centrifugal pump. The closed impeller is composed of blades and front and rear cover plates.

[0003] For example, the invention patent with publication number CN117823455B discloses a compression closed impeller for a centrifugal compressor, including multiple blades, an impeller and a wheel cover, the impeller is divided into a straight section, a gradient section and an annular section, the left end of the straight section is fixedly connected to the right end of the gradient section, the outer annular surface of the gradient section is fixedly connected to the inner annular surface of the annular section, a plurality of gradient inner grooves are provided on the inner straight surface of the straight section, the plurality of gradient inner grooves are matched with the plurality of blades respectively, an outward-expanding gradient groove is provided on the inner gradient surface of the gradient section, the plurality of outward-expanding gradient grooves are matched with the plurality of blades respectively, a plurality of gradient surface grooves are provided on the left end surface of the annular section, the plurality of gradient surface grooves are matched with the plurality of blades respectively, and the wheel cover includes a cover ring panel, an inner gradient outer slope ring and an inner liner.

[0004] In the above case, since the closed impeller has a narrow opening, when the liquid contains larger particles or long fibers, these substances are easily stuck in the narrow gap inside the impeller, and the impeller needs to be cleaned regularly. However, since the closed impeller has cover plates in front and behind the blades, and is usually connected by welding structure, it cannot be disassembled and separated, which easily blocks the cleaning area, making cleaning more difficult.

[0005] To this end, the present invention proposes a pump impeller structure to solve the above problems. Summary of the invention

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a pump impeller structure, comprising: an upper cover plate and a lower cover plate, wherein a plurality of upper impellers are fixedly connected in an array at the bottom end of the upper cover plate, and a plurality of lower impellers are fixedly connected in an array at the top end of the lower cover plate corresponding to the position of the upper impeller, and a clamping mechanism is provided between the upper impeller and the lower impeller; The clamping mechanism comprises: A plurality of first mounting grooves and a plurality of second mounting grooves, wherein the plurality of first mounting grooves are arranged in an array along the trajectory of the upper impeller at the bottom end of the upper impeller, and the plurality of second mounting grooves are arranged in an array along the trajectory of the lower impeller at the top end of the lower impeller; An upper plugboard, the top of which is fixedly connected in the first mounting groove, and the side wall of which is slidably connected with a first clamping block; A lower plug board, wherein the lower plug board is fixedly connected in the second mounting groove, and a second clamping groove is formed on a side wall of the lower plug board; The first pushing mechanism is used to push the first clamping block so that the first clamping block is inserted into the second clamping groove to achieve the connection between the upper impeller and the lower impeller.

[0007] Preferably, the clamping mechanism further includes: A first clamping groove, which is provided on a side wall of the upper plugboard and is located below the first clamping block; A second clamping block, wherein the second clamping block is slidably connected to the side wall of the lower plug board, and the second clamping block is located below the second clamping groove; The second pushing mechanism is used to push the second clamping block so that the second clamping block is inserted into the first clamping groove.

[0008] Preferably, the first pushing mechanism comprises: Two first drive plates, the two first drive plates are symmetrically slidably connected in the upper plug plate, a first spring is fixedly connected between the first drive plate and the inner wall of the upper plug plate, a first drive groove is opened on the side wall of the first drive plate, the first drive groove has a first straight groove and a first oblique groove, and first sliding pins are symmetrically fixedly connected on both sides of the first clamping block, and the first sliding pins are slidably connected in the first drive groove; The pushing component is used to push the two first driving plates so that the first driving plates drive the first clamping blocks to move.

[0009] Preferably, the second pushing mechanism comprises: Two second drive plates, the two second drive plates are symmetrically slidably connected in the lower plug plate, a second spring is fixedly connected between the second drive plate and the inner wall of the lower plug plate, a second inclined groove is opened on the side wall of the second drive plate, and second sliding pins are symmetrically fixedly connected on both sides of the second clamping block, and the second sliding pins are slidably connected in the second inclined groove; A U-shaped driving frame, the U-shaped driving frame is slidably connected in the second clamping groove, and the U-shaped driving frame has third inclined grooves symmetrically opened on both sides; Two driving rods, the bottom ends of the two driving rods are fixedly connected to the top end of the second driving plate, the top ends of the driving rods are fixedly connected with a third sliding pin, and the third sliding pin is slidably connected in the third inclined groove.

[0010] Preferably, the pushing assembly comprises: A cavity, wherein the cavity is opened in the upper cover plate; A piston plate, the piston plate is fixedly connected to the top ends of the two first drive plates, and the piston plate is slidably sealed on the inner wall of the top end of the upper insert plate; A pipe, wherein the bottom end of the pipe passes through the top end of the upper insert plate, and the top end of the pipe passes through the upper cover plate to communicate with the cavity; An annular groove, the annular groove is opened at the top of the upper cover plate, a plurality of air inlet holes are arranged in an array at the bottom end of the annular groove, and a plurality of thread grooves are arranged in an array in the annular groove; The motor shaft sleeve is fixedly connected with an annular compression plate on the outside of the motor shaft sleeve. The annular compression plate is inserted into the annular groove and fixed by bolts to connect and fix the motor shaft sleeve to the upper cover plate.

[0011] Preferably, it also includes: A plurality of arc-shaped slide grooves, wherein an array of the arc-shaped slide grooves is provided on the outer side wall of the upper impeller, wherein an L-shaped limit seat is slidably connected in the arc-shaped slide groove, a third spring is fixedly connected between the L-shaped limit seat and the arc-shaped slide groove, and a limit plug rod is fixedly connected to the top end of the L-shaped limit seat; A locking groove, wherein the locking groove is arranged on the outer side wall of the lower impeller at a position corresponding to the L-shaped limit seat, wherein the locking groove has a second straight groove and a V-shaped groove, wherein the top end of the second straight groove passes through the top end of the lower impeller, and the V-shaped groove has a fourth oblique groove and a fifth oblique groove, wherein the fourth oblique groove is inclined toward the center of the lower cover plate, and the fifth oblique groove is inclined away from the center of the lower cover plate.

[0012] Preferably, a base is fixedly connected to the bottom end of the upper impeller, and a limiting groove matched with the base is formed at the top end of the lower impeller.

[0013] Preferably, the L-shaped limiting seat is a metal counterweight seat.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an upper plug plate and a lower plug plate, so that the closed impeller is easy to assemble and disassemble, and if part of the impeller is damaged, such as the upper cover plate and the upper impeller or the lower cover plate and the lower impeller, the damaged part can be replaced, thereby reducing loss.

[0015] The present invention provides an L-shaped limit seat and a locking groove. During the installation process, the limit rod is squeezed by the fifth inclined groove in the locking groove, so that the lower cover plate is tightened, which is beneficial to make the upper impeller and the lower impeller surface fully fit together, and improve the stability of the connection between the upper cover plate and the lower cover plate. During use, the limit rod is moved along the fifth inclined groove under the action of centrifugal force. Under the squeezing action of the inclined surface of the second inclined groove, the lower cover plate is further tightened, so that the upper impeller and the lower impeller surfaces are further fully fitted together, and then the stability of the connection between the upper cover plate and the lower cover plate is further enhanced.

[0016] The present invention provides a clamping seat and a limiting groove to limit the axial direction of the upper cover plate and the lower cover plate, which is beneficial to avoid the possibility of misalignment, thereby improving the stability of the connection between the upper cover plate and the lower cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the connection between the upper cover plate and the lower cover plate of the present invention; Figure 2 It is a schematic diagram of the connection between the upper cover plate and the upper impeller of the present invention; Figure 3 It is a schematic diagram of the connection between the lower cover plate and the lower impeller of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 is a cross-sectional view of the upper cover plate of the present invention; Figure 6 It is a connection diagram of the motor sleeve and the annular compression plate of the present invention; Figure 7 is a cross-sectional view of the upper insert plate in the present invention; Figure 8 for Figure 7 Enlarged view of point B in the middle; Fig. 9 is a cross-sectional view of the lower plug plate of the present invention; Fig.10 for Fig. 9 Enlarged view of point C in the middle; Fig.11 for Fig. 9 Enlarged view of point D in the middle.

[0018] In the figure: upper cover plate 1, upper impeller 2, first mounting groove 3, cavity 4, upper plug plate 5, first clamping block 6, first clamping groove 7, first drive plate 8, first spring 9, first drive groove 10, first straight groove 1001, first inclined groove 1002, piston plate 11, pipeline 12, annular groove 13, air inlet 14, threaded groove 15, motor sleeve 16, annular compression plate 17, arc-shaped slide groove 18, L-shaped limit seat 19, third spring 20, limit plug rod 21, clamping seat 22, lower cover plate 23, lower impeller 24, second mounting groove 25, lower plug plate 26, second clamping groove 27, second clamping block 28, second drive plate 29, second spring 30, second inclined groove 31, U-shaped drive frame 32, third inclined groove 33, drive rod 34, second straight groove 35, V-shaped groove 36, fourth inclined groove 3601, fifth inclined groove 3602, limiting groove 37. DETAILED DESCRIPTION

[0019] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0020] like Figures 1 to 11A pump impeller structure shown includes: an upper cover plate 1 and a lower cover plate 23, wherein a plurality of upper impellers 2 are fixedly connected in an array at the bottom end of the upper cover plate 1, and a plurality of lower impellers 24 are fixedly connected in an array at the top end of the lower cover plate 23 corresponding to the position of the upper impeller 2, and a clamping mechanism is provided between the upper impeller 2 and the lower impeller 24; The card connection mechanism includes: A plurality of first mounting grooves 3 and a plurality of second mounting grooves 25, wherein the plurality of first mounting grooves 3 are arranged in an array along the trajectory of the upper impeller 2 at the bottom end of the upper impeller 2, and the plurality of second mounting grooves 25 are arranged in an array along the trajectory of the lower impeller 24 at the top end of the lower impeller 24; An upper plugboard 5, the top of which is fixedly connected to the first mounting groove 3, and a first clamping block 6 is slidably connected to the side wall of the upper plugboard 5; A lower plug board 26, which is fixedly connected in the second mounting groove 25, and a second clamping groove 27 is formed on the side wall of the lower plug board 26; A first pushing mechanism, the pushing mechanism is used to push the first clamping block 6 so that the first clamping block 6 is inserted into the second clamping groove 27 to achieve the connection between the upper impeller 2 and the lower impeller 24; The card connection mechanism also includes: A first clamping groove 7, which is provided on the side wall of the upper plug board 5 and is located below the first clamping block 6; A second clamping block 28, which is slidably connected to the side wall of the lower plug board 26, and is located below the second clamping groove 27; A second pushing mechanism, the second pushing mechanism is used to push the second clamping block 28 so that the second clamping block 28 is inserted into the first clamping groove 7; The first driving forces include: Two first drive plates 8, the two first drive plates 8 are symmetrically slidably connected in the upper plug plate 5, a first spring 9 is fixedly connected between the first drive plate 8 and the inner wall of the upper plug plate 5, a first drive groove 10 is opened on the side wall of the first drive plate 8, the first drive groove 10 has a first straight groove 1001 and a first oblique groove 1002, and first sliding pins are symmetrically fixedly connected on both sides of the first clamping block 6, and the first sliding pins are slidably connected in the first drive groove 10; A pushing component, which is used to push the two first driving plates 8 so that the first driving plates 8 drive the first clamping block 6 to move; The second driving force includes: Two second drive plates 29, the two second drive plates 29 are symmetrically slidably connected in the lower plug plate 26, a second spring 30 is fixedly connected between the second drive plates 29 and the inner wall of the lower plug plate 26, a second inclined groove 31 is opened on the side wall of the second drive plate 29, and second sliding pins are symmetrically fixedly connected on both sides of the second clamping block 28, and the second sliding pins are slidably connected in the second inclined groove 31; A U-shaped driving frame 32, the U-shaped driving frame 32 is slidably connected in the second clamping groove 27, and third inclined grooves 33 are symmetrically opened on both sides of the U-shaped driving frame 32; Two driving rods 34, the bottom ends of the two driving rods 34 are fixedly connected to the top end of the second driving plate 29, the top ends of the driving rods 34 are fixedly connected to a third sliding pin, and the third sliding pin is slidably connected in the third inclined slot 33; The push components include: A cavity 4 is provided in the upper cover plate 1; The piston plate 11 is fixedly connected to the top ends of the two first drive plates 8, and the piston plate 11 is slidably sealed on the inner wall of the top end of the upper insert plate 5; The pipe 12, the bottom end of the pipe 12 passes through the top end of the upper insert plate 5, and the top end of the pipe 12 passes through the upper cover plate 1 and communicates with the cavity 4; An annular groove 13, the annular groove 13 is opened at the top of the upper cover plate 1, a plurality of air inlet holes 14 are arranged in an array at the bottom end of the annular groove 13, and a plurality of thread grooves 15 are arranged in an array in the annular groove 13; The motor sleeve 16 is fixedly connected to the outer side of the motor sleeve 16 with an annular compression plate 17, which is inserted into the annular groove 13 and fixed by bolts to connect and fix the motor sleeve 16 to the upper cover plate 1; Specifically, in the prior art, since the closed impeller opening is narrow, when the liquid contains large particles or long fibers, these substances are easily stuck in the narrow gap in the impeller, and the impeller needs to be cleaned regularly. However, since the closed impeller has cover plates in front and behind the blades, and is usually connected by a welding structure, it is impossible to disassemble and separate, so it is easy to block the cleaning area, making cleaning more difficult. This technical solution can solve the above problems, and the specific operations are as follows: By setting the upper plug plate 5 and the lower plug plate 26, when the closed impeller needs to be assembled, the upper impeller 2 and the lower impeller 24 are aligned first, and then the upper cover plate 1 is pressed down to insert the upper plug plate 5 into the second mounting groove 25, and the lower plug plate 26 is inserted into the first mounting groove 3, and then the annular compression plate 17 on the motor sleeve 16 is inserted into the annular groove 13 to compress the air in the annular groove 13 to increase the pressure in the cavity 4, so that the piston plate 11 pushes the first drive plate 8 to move downward, and the first spring 9 is compressed to generate elastic force. During the downward movement of the first drive plate 8, the first sliding pin slides along the first inclined groove 1002 in the first drive groove 10, and then the first sliding pin slides into the first straight groove 1001. During the sliding process in the first inclined groove 1002, the first clamping block 6 extends out and is inserted into the second clamping groove 27, so that the upper plug plate 5 and the lower plug plate 26 are clamped together, and then the upper impeller 2 and the lower impeller 24 are connected together to form a closed impeller.

[0021] When the first clamping block 6 is inserted into the second clamping groove 27, the first clamping block 6 pushes and squeezes the U-shaped driving frame 32, so that the U-shaped driving frame 32 moves into the second clamping groove 27, so that the third sliding pin on the driving rod 34 slides along the third inclined groove 33. Driven by the third inclined groove 33, the driving rod 34 drives the second driving plate 29 to move upward, and the second spring 30 is compressed to generate elastic force, so that the second sliding pin slides along the second inclined groove 31. Driven by the second inclined groove 31, the second clamping block 28 is inserted into the first clamping groove 7, increasing the contact area between the upper plug plate 5 and the lower plug plate 26, thereby further improving the stability of the connection between the upper plug plate 5 and the lower plug plate 26, which is beneficial to improving the stability of the connection between the upper impeller 2 and the lower impeller 24. When it is necessary to clean the dirt in the impeller, the motor sleeve 16 is first disassembled from the upper cover plate 1, so that the annular compression plate 17 falls off from the annular groove 13, so that the air pressure is restored, and then under the action of the air pressure, the first spring 9 and the second spring 30, the first drive plate 8 and the second drive plate 29 are reset, and then the first clamping block 6 and the second clamping block 28 are respectively dropped from the second clamping groove 27 and the first clamping groove 7, so that the upper plug plate 5 and the lower plug plate 26 are disconnected, and then the upper cover plate 1 and the lower cover plate 23 are disassembled to clean the dirt on the surface of the impeller; In addition, if a part of the impeller is damaged, such as the upper cover plate 1 and the upper impeller 2 or the lower cover plate 23 and the lower impeller 24, the damaged part can be replaced to reduce the loss.

[0022] As a further embodiment of the present invention, it also includes: A plurality of arc-shaped slide grooves 18 are arranged in an array on the outer wall of the upper impeller 2. An L-shaped limit seat 19 is slidably connected in the arc-shaped slide groove 18. A third spring 20 is fixedly connected between the L-shaped limit seat 19 and the arc-shaped slide groove 18. A limit rod 21 is fixedly connected to the top of the L-shaped limit seat 19. A locking groove, the locking groove is provided on the outer side wall of the lower impeller 24 at a position corresponding to the L-shaped limit seat 19, the locking groove has a second straight groove 35 and a V-shaped groove 36, the top end of the second straight groove 35 passes through the top end of the lower impeller 24, the V-shaped groove 36 has a fourth inclined groove 3601 and a fifth inclined groove 3602, the fourth inclined groove 3601 is inclined toward the center of the lower cover plate 23, and the fifth inclined groove 3602 is inclined away from the center of the lower cover plate 23; It should be noted that the L-shaped limit seat 19 is a metal counterweight seat; Specifically, scenario 1: when installation is required, first press down the upper cover plate 1. During the process of pressing down the upper cover plate 1, the limiting rod 21 at the top of the L-shaped limiting seat 19 enters from the second straight groove 35, and then is guided by the fourth inclined groove 3601, so that the L-shaped limiting seat 19 moves toward the center of the circle of the lower cover plate 23, and the third spring 20 is pulled to generate elastic force, and then the limiting rod 21 moves to the bottom of the fourth inclined groove 3601. Under the action of the third spring 20, the limiting rod 21 enters the fifth inclined groove 3602 and is squeezed by the inclined surface of the fifth inclined groove 3602, thereby tightening the lower cover plate 23, which is conducive to fully fitting the surfaces of the upper impeller 2 and the lower impeller 24, and improving the stability of the connection between the upper cover plate 1 and the lower cover plate 23; Scenario 2: When in use, the upper cover plate 1 is driven to rotate by an external motor, so that the lower cover plate 23 rotates synchronously. Since the L-shaped limit seat 19 is a metal counterweight seat, under the action of centrifugal force, the L-shaped limit seat 19 makes centrifugal motion along the arc-shaped slide groove 18, so that the limit rod 21 moves along the fifth inclined groove 3602. Under the extrusion effect of the inclined surface of the second inclined groove 31, the lower cover plate 23 is further tightened, so that the surfaces of the upper impeller 2 and the lower impeller 24 are further fully fitted, and then the stability of the connection between the upper cover plate 1 and the lower cover plate 23 is further enhanced; It should be understood that: affected by the motor power, when the closed impeller rotates faster, the L-shaped limit seat 19 moves farther along the arc-shaped slide groove 18, and the limit rod 21 moves farther along the fifth inclined groove 3602, so that the L-shaped limit seat 19 is subjected to greater squeezing force from the inclined surface of the fifth inclined groove 3602, and the force is mutual, thereby enhancing the stability of the connection between the upper cover plate 1 and the lower cover plate 23.

[0023] As a further embodiment of the present invention, the bottom end of the upper impeller 2 is fixedly connected with a holder 22, and the top end of the lower impeller 24 is provided with a limiting groove 37 adapted to the holder 22; Specifically, by providing the clamping seat 22 and the limiting groove 37 to limit the axial direction of the upper cover plate 1 and the lower cover plate 23, it is helpful to avoid the possibility of misalignment, thereby improving the stability of the connection between the upper cover plate 1 and the lower cover plate 23.

[0024] Working principle of the present invention: By setting the upper plug plate 5 and the lower plug plate 26, when the closed impeller needs to be assembled, the upper impeller 2 and the lower impeller 24 are aligned first, and then the upper cover plate 1 is pressed down to insert the upper plug plate 5 into the second mounting groove 25, and the lower plug plate 26 is inserted into the first mounting groove 3, and then the annular compression plate 17 on the motor sleeve 16 is inserted into the annular groove 13 to compress the air in the annular groove 13 to increase the pressure in the cavity 4, so that the piston plate 11 pushes the first drive plate 8 to move downward, and the first spring 9 is compressed to generate elastic force. During the downward movement of the first drive plate 8, the first sliding pin slides along the first inclined groove 1002 in the first drive groove 10, and then the first sliding pin slides into the first straight groove 1001. During the sliding process in the first inclined groove 1002, the first clamping block 6 extends out and is inserted into the second clamping groove 27, so that the upper plug plate 5 and the lower plug plate 26 are clamped together, and then the upper impeller 2 and the lower impeller 24 are connected together to form a closed impeller.

[0025] When the first clamping block 6 is inserted into the second clamping groove 27, the first clamping block 6 pushes and squeezes the U-shaped driving frame 32, so that the U-shaped driving frame 32 moves into the second clamping groove 27, so that the third sliding pin on the driving rod 34 slides along the third inclined groove 33. Driven by the third inclined groove 33, the driving rod 34 drives the second driving plate 29 to move upward, and the second spring 30 is compressed to generate elastic force, so that the second sliding pin slides along the second inclined groove 31. Driven by the second inclined groove 31, the second clamping block 28 is inserted into the first clamping groove 7, increasing the contact area between the upper plug plate 5 and the lower plug plate 26, thereby further improving the stability of the connection between the upper plug plate 5 and the lower plug plate 26, which is beneficial to improving the stability of the connection between the upper impeller 2 and the lower impeller 24. When it is necessary to clean the dirt in the impeller, the motor sleeve 16 is first disassembled from the upper cover plate 1, so that the annular compression plate 17 falls off from the annular groove 13, so that the air pressure is restored, and then under the action of the air pressure, the first spring 9 and the second spring 30, the first drive plate 8 and the second drive plate 29 are reset, and then the first clamping block 6 and the second clamping block 28 are respectively dropped from the second clamping groove 27 and the first clamping groove 7, so that the upper plug plate 5 and the lower plug plate 26 are disconnected, and then the upper cover plate 1 and the lower cover plate 23 are disassembled to clean the dirt on the surface of the impeller; In addition, if a part of the impeller is damaged, such as the upper cover plate 1 and the upper impeller 2 or the lower cover plate 23 and the lower impeller 24, the damaged part can be replaced to reduce the loss.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A pump impeller structure, characterized in that: include: An upper cover plate (1) and a lower cover plate (23), wherein a plurality of upper impellers (2) are fixedly connected in an array at the bottom end of the upper cover plate (1), and a plurality of lower impellers (24) are fixedly connected in an array at the top end of the lower cover plate (23) at positions corresponding to the upper impellers (2), and a clamping mechanism is provided between the upper impellers (2) and the lower impellers (24); The clamping mechanism comprises: A plurality of first mounting grooves (3) and a plurality of second mounting grooves (25), wherein the plurality of first mounting grooves (3) are arranged in an array along the trajectory of the upper impeller (2) at the bottom end of the upper impeller (2), and the plurality of second mounting grooves (25) are arranged in an array along the trajectory of the lower impeller (24) at the top end of the lower impeller (24); An upper plug plate (5), the top end of the upper plug plate (5) being fixedly connected in the first mounting groove (3), and the side wall of the upper plug plate (5) being slidably connected to a first clamping block (6); A lower plug plate (26), the lower plug plate (26) being fixedly connected in the second mounting groove (25), and a second clamping groove (27) being formed on a side wall of the lower plug plate (26); A first pushing mechanism, the pushing mechanism being used to push the first clamping block (6) so that the first clamping block (6) is inserted into the second clamping groove (27) to achieve connection between the upper impeller (2) and the lower impeller (24).

2. A pump impeller structure according to claim 1, characterized in that: The clamping mechanism further comprises: A first clamping groove (7), the first clamping groove (7) being formed on a side wall of the upper plug plate (5), the first clamping groove (7) being located below the first clamping block (6); a second clamping block (28), the second clamping block (28) being slidably connected to a side wall of the lower plug plate (26), the second clamping block (28) being located below the second clamping slot (27); A second pushing mechanism, the second pushing mechanism is used to push the second clamping block (28) so that the second clamping block (28) is inserted into the first clamping groove (7).

3. A pump impeller structure according to claim 1, characterized in that: The first driving mechanism comprises: Two first drive plates (8), the two first drive plates (8) are symmetrically slidably connected in the upper plug plate (5), a first spring (9) is fixedly connected between the first drive plate (8) and the inner wall of the upper plug plate (5), a first drive groove (10) is opened on the side wall of the first drive plate (8), the first drive groove (10) has a first straight groove (1001) and a first inclined groove (1002), and first sliding pins are symmetrically fixedly connected on both sides of the first clamping block (6), and the first sliding pins are slidably connected in the first drive groove (10); A pushing component, the pushing component is used to push the two first drive plates (8), so that the first drive plates (8) drive the first clamping block (6) to move.

4. A pump impeller structure according to claim 2, characterized in that: The second driving mechanism comprises: Two second drive plates (29), the two second drive plates (29) are symmetrically slidably connected in the lower plug plate (26), a second spring (30) is fixedly connected between the second drive plates (29) and the inner wall of the lower plug plate (26), a second inclined groove (31) is formed on the side wall of the second drive plate (29), and second sliding pins are symmetrically fixedly connected on both sides of the second clamping block (28), and the second sliding pins are slidably connected in the second inclined groove (31); A U-shaped driving frame (32), the U-shaped driving frame (32) being slidably connected in the second clamping groove (27), and third inclined grooves (33) being symmetrically formed on both sides of the U-shaped driving frame (32); Two driving rods (34), the bottom ends of the two driving rods (34) are fixedly connected to the top end of the second driving plate (29), the top ends of the driving rods (34) are fixedly connected to a third sliding pin, and the third sliding pin is slidably connected in the third inclined groove (33).

5. A pump impeller structure according to claim 3, characterized in that: The pushing component comprises: A cavity (4), wherein the cavity (4) is formed in the upper cover plate (1); A piston plate (11), the piston plate (11) being fixedly connected to the top ends of the two first drive plates (8), the piston plate (11) being slidably sealed on the inner wall of the top end of the upper insert plate (5); A pipe (12), wherein the bottom end of the pipe (12) passes through the top end of the upper insert plate (5), and the top end of the pipe (12) passes through the interior of the upper cover plate (1) and communicates with the cavity (4); An annular groove (13), the annular groove (13) being provided at the top end of the upper cover plate (1), a plurality of air inlet holes (14) being provided in an array at the bottom end of the annular groove (13), and a plurality of thread grooves (15) being provided in an array inside the annular groove (13); A motor shaft sleeve (16), wherein an annular compression plate (17) is fixedly connected to the outside of the motor shaft sleeve (16), and the annular compression plate (17) is inserted into the annular groove (13) and fixed by bolts to connect and fix the motor shaft sleeve (16) to the upper cover plate (1).

6. A pump impeller structure according to claim 1, characterized in that: Also includes: A plurality of arc-shaped slide grooves (18), wherein an array of the arc-shaped slide grooves (18) is provided on the outer wall of the upper impeller (2), an L-shaped limit seat (19) is slidably connected in the arc-shaped slide groove (18), a third spring (20) is fixedly connected between the L-shaped limit seat (19) and the arc-shaped slide groove (18), and a limit plug rod (21) is fixedly connected to the top end of the L-shaped limit seat (19); A locking groove, the locking groove being provided on the outer side wall of the lower impeller (24) at a position corresponding to the L-shaped limit seat (19), the locking groove comprising a second straight groove (35) and a V-shaped groove (36), the top end of the second straight groove (35) passing through the top end of the lower impeller (24), the V-shaped groove (36) comprising a fourth inclined groove (3601) and a fifth inclined groove (3602), the fourth inclined groove (3601) being inclined toward the center of the circle of the lower cover plate (23), and the fifth inclined groove (3602) being inclined away from the center of the circle of the lower cover plate (23).

7. A pump impeller structure according to claim 1, characterized in that: The bottom end of the upper impeller (2) is fixedly connected to a clamping seat (22), and the top end of the lower impeller (24) is provided with a limiting groove (37) adapted to the clamping seat (22).

8. A pump impeller structure according to claim 6, characterized in that: The L-shaped limiting seat (19) is a metal counterweight seat.

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