Integrated flow guide structure and water pump applying same

Abstract

The utility model relates to an integrated flow guide structure and a water pump applying the same, and solves the problems that the structure is complicated, the assembly size is difficult to control, axial movement occurs during working and the like in the prior art. According to the technical scheme, the water purifier comprises an inner cylinder, an outer cylinder and a flow guide cover arranged in an inner cavity of the inner cylinder, the inner cylinder and the outer cylinder are provided with center water inlet channels which are sequentially communicated, the inner cylinder, the flow guide cover and the outer cylinder are of an integrated structure, and a plurality of flow guide walls which are arranged in a centrosymmetric vortex mode are arranged on the inner side wall of the outer end of the inner cylinder. The flow guide cover is fixed to the flow guide wall in a buckled mode, the outer side wall of the flow guide wall and the outer side wall of the flow guide cover are the inner side walls of the flow guide channel, the inner side wall of the inner cylinder is the outer side wall of the flow guide channel, and a flow guide opening is formed in the side wall of the outer cylinder. The integrated flow guide structure has the advantages of being beneficial to structure simplification, convenient to produce, machine and assemble, beneficial to improvement of assembly reliability and sealing performance, beneficial to prevention of axial movement, beneficial to guarantee of hydraulic efficiency of the water pump and reduction of noise due to the adoption of the integrated flow guide structure.

Description

Technical Field

[0001] This utility model relates to the field of water pump accessories and the field of water pumps, and in particular to an integrated flow guiding structure and a water pump using the same. Background Technology

[0002] Chinese utility model patent CN205918617U, entitled "Multistage Centrifugal Pump with Plastic Bracket Cover", discloses the following technical solution: It includes a motor, a pump body with its rear end mounted on a bracket, a return cover at the front end of the pump body, several guide vanes on the return cover, an impeller fixedly connected to the motor shaft, a pump cover between the foremost guide vane and the return cover, a through hole connecting the inlet chamber and the impeller on the pump cover, an inlet on the return cover communicating with the inlet chamber and extending to the outside of the pump body, a plastic bracket cover fitted onto the shaft and fastened to the pump body at the front of the bracket, a pump cavity formed between the bracket cover and the pump body, an outlet communicating with the pump cavity at the upper part of the pump body, the return cover and guide vanes located within the pump cavity, and a return structure for connecting the pump cavity and the inlet chamber on the return cover. In this technical solution, the return cover and the guide vane are independent components. During assembly, due to the existence of cumulative tolerances, both oversized and undersized machining dimensions are easily amplified. If the machining dimensions are too large, poor sealing is likely to occur during assembly; if the machining dimensions are too small, there will be a large gap after assembly, and the guide vane is prone to axial movement, producing a large abnormal noise, and also easily affecting hydraulic efficiency. Summary of the Invention

[0003] The purpose of this utility model is to solve the above-mentioned problems existing in the prior art by providing an integrated flow guide structure and a water pump using it. The flow guide structure, which integrates the guide vane, return cover and other structures into one integrated structure, avoids problems such as unreliable sealing or axial movement caused by accumulated tolerances between multiple components. It is beneficial to simplify the structure, facilitate production and assembly, improve assembly efficiency, assembly reliability and assembly sealing, thereby reducing production and processing costs, ensuring the hydraulic efficiency of the water pump, and reducing equipment operating noise.

[0004] The above-mentioned technical objectives of this utility model are mainly achieved through the following technical solutions:

[0005] The technical solution of the first technical subject of this utility model is: an integrated flow guiding structure, characterized in that it includes an inner cylinder, an outer cylinder, and a flow guiding cover disposed in the inner cavity of the inner cylinder, all having a centrally connected water inlet channel. The inner cylinder, the flow guiding cover, and the outer cylinder are an integrated structure. The inner sidewall of the outer end of the inner cylinder is provided with a plurality of flow guiding walls arranged in a centrally symmetrical vortex. The flow guiding cover is fastened and fixed to the flow guiding wall. The outer sidewall of the flow guiding wall and the outer sidewall of the flow guiding cover are the inner sidewall of the flow guiding channel. The inner sidewall of the inner cylinder is the outer sidewall of the flow guiding channel. The sidewall of the outer cylinder is provided with a flow guiding port. This technical solution integrates the existing guide vanes, return cover, and other structures into a single flow guide structure. This avoids problems such as poor assembly sealing or axial movement caused by accumulated tolerances between multiple components. It simplifies the structure, facilitates production and assembly, improves assembly efficiency and reliability, and enhances assembly sealing reliability. This, in turn, reduces production and processing costs, ensures the hydraulic efficiency of the water pump, and reduces equipment operating noise. The inner cylinder, outer cylinder, and flow guide cover can be manufactured independently initially, and then connected together using screws or welding to form a single integrated structure. The guide wall serves two purposes: firstly, it forms a flow channel inside the inner cylinder; secondly, it facilitates fixation with the guide vane and makes the outer wall of the guide vane part of the inner wall of the flow channel. This ensures that the flow channel has sufficient axial length and can smoothly connect with the flow port on the outer cylinder. During use, this facilitates smooth and unobstructed connection between the impeller cavity at the inner end of the inner cylinder and the water outlet channel on the pump body, reducing hydraulic losses, improving hydraulic efficiency, and reducing noise generated during hydraulic losses, thereby effectively reducing the noise of the water pump during operation.

[0006] As a further improvement and supplement to the above technical solution, this utility model adopts the following technical measures: each of the guide walls corresponds to and cooperates with each of the guide channels. The inlet of each guide channel is connected to the inner cavity of the inner cylinder, and the outlet of each guide channel is connected to the guide port. Each guide channel is isolated by its corresponding guide wall, making each guide channel relatively independent. However, the inlet of each guide channel is connected to the impeller cavity at the inner end of the inner cylinder, and the outlet of each guide channel is connected to the guide port on the side wall of the outer cylinder. This allows each guide channel to guide water relatively independently, reducing the possibility of eddies generated during the process of water flowing from the impeller into the outlet channel of the pump body. This helps to reduce hydraulic losses caused by eddies, thereby improving water flow efficiency, i.e., the working efficiency of the pump.

[0007] Preferably, one end of the guide wall is integrally formed with the inner wall of the inner cylinder, and the other end of the guide wall extends in a vortex toward the center of the inner cylinder. The outer wall of the guide cover is fastened and fixed to the guide wall. That is, the guide wall and the guide cover can be stably formed on an integral guide structure. Through the cooperation between the guide cover and the outer cylinder, the guide wall, the guide cover, and the outer cylinder form an integral structure, which helps to ensure the overall strength of the guide wall, avoid vibration during operation, and thus help to ensure pump efficiency and relatively low operating noise.

[0008] Preferably, the inner end wall of the guide wall has several axially arranged stepped structures, and the outer side wall of the guide cover has several axial mounting notches. The stepped structures on the guide wall correspond one-to-one with the mounting notches, and the outer side wall of the guide cover and the outer side wall of each guide wall form a smooth inner side wall of the guide channel. The cooperation between the stepped structures and the mounting notches not only facilitates positioning and fixing, but also increases the connection area between the guide wall and the guide cover, thereby increasing the connection strength. When the integrated guide structure is applied to the water pump, the cooperation between the stepped structures and the mounting notches can form axial and radial cooperation forces, which helps to ensure the reliability of the fixed position of the stepped structures and the mounting notches, thus helping to ensure the overall strength and operational reliability of the integrated guide structure.

[0009] Preferably, the inner end cavity of the inner cylinder is an impeller cavity, and the central water inlet channel on the inner cylinder is used to cooperate with the water inlet of the impeller. The water outlet of the impeller cavity, corresponding to the water outlet of the impeller, is the water outlet channel on the inner cylinder, and the water outlet channel on the inner cylinder is connected to the guide channel. That is, the central water inlet channel on the outer cylinder, the central water inlet channel of the guide cover on the guide cover, and the central water inlet channel of the guide cover on the inner cylinder are coaxially arranged and have compatible diameters. This allows the integrated guide structure to be applied to a water pump, so that the water inlet of the impeller in the impeller cavity is connected to the central water inlet channel, and the water inlet on the pump body is connected to the water inlet of the impeller through the central water inlet channel; while the water outlet of the impeller and the inner cavity of the inner cylinder form a water outlet channel, and the water outlet channel is connected to the water outlet channel on the pump body through the guide channel on the inner cylinder.

[0010] Preferably, at least one of the outer walls of the inner cylinder and the outer cylinder is provided with an external lug. The external lug is an integral structure with the inner cylinder and / or the outer cylinder, and is used to fix it to the corresponding part of the pump body. The external lug can be a spaced-out protrusion or a protruding ring, etc. The external lug is fixed to the corresponding part of the pump body, thereby fixing the integrated flow guide structure in the pump body. This helps to ensure the fixed position of the integrated flow guide structure, avoids axial movement or circumferential rotation under the action of water flow during pump operation, and helps to ensure the reliability and hydraulic efficiency of the pump.

[0011] Preferably, a reflux hole is provided on the side wall of the outer cylinder, which is used to cooperate with the self-priming reflux channel on the pump body.

[0012] Preferably, the outer cylinder includes an outer cylinder portion and a water inlet cylinder portion disposed in the inner cavity of the outer cylinder portion. The outer end of the water inlet cylinder portion is radially folded outward to form an integral structure with the inner sidewall of the outer cylinder portion. The inner end of the water inlet cylinder portion forms an integral structure with the top wall of the guide cover. The inner cavity of the water inlet cylinder portion is the central water inlet channel on the outer cylinder portion, and the inner diameter of the central water inlet channel on the water inlet cylinder portion is adapted to the inner diameter of the central water inlet channel on the guide cover.

[0013] The second technical solution of this utility model relates to a water pump, comprising a motor, a pump body, an impeller driven by the motor, and a flow guiding structure cooperating with the impeller. The impeller and the flow guiding structure are disposed in the pump cavity of the pump body. The pump body is provided with a pump inlet and a pump outlet channel communicating with the pump cavity. The characteristic of this utility model is that the flow guiding structure is the aforementioned integrated flow guiding structure. The impeller is disposed in the impeller cavity of the inner cylinder. The inlet of the impeller is connected to the central inlet channel in the flow guiding structure. The outlet of the impeller is connected to the inlet of the flow guiding channel. The outlet of the flow guiding channel is connected to the pump outlet channel on the pump body through a flow guiding port on the outer cylinder. The inlet of the central inlet channel in the flow guiding structure is connected to the pump inlet on the pump body. The difference from the prior art is that the water pump adopts an integrated flow guiding structure, possessing all the technical effects of an integrated flow guiding structure.

[0014] Preferably, the pump body is provided with a self-priming return channel, which is connected to the central water inlet channel on the flow guide structure through a return hole on the flow guide structure.

[0015] The beneficial effects of this utility model are as follows: 1. By integrating the existing guide vane, return cover, and other structures into a single flow guiding structure, problems such as poor assembly sealing or axial movement caused by accumulated tolerances between multiple components can be avoided. This simplifies the structure, facilitates production and assembly, and improves assembly efficiency, reliability, and sealing, thereby reducing production and processing costs, ensuring the hydraulic efficiency of the water pump, and reducing equipment noise. 2. The flow guiding wall serves two purposes: firstly, it forms a flow guiding channel inside the inner cylinder; secondly, it facilitates fixation with the guide vane, and the outer wall of the guide vane forms part of the inner wall of the flow guiding channel. This ensures the flow guiding channel has sufficient axial length and can smoothly connect with the flow inlet on the outer cylinder, reducing or even eliminating eddy currents. This not only ensures water pump efficiency but also helps control the noise level during pump operation. 3. The stepped structure on the guide wall and the installation notch of the guide cover increase the connection area between them, thus increasing connection strength. When the integrated guide structure is used in the pump, the fit between the stepped structure and the installation notch creates axial and radial forces, ensuring reliable fixation and thus enhancing the overall strength and operational reliability of the integrated guide structure. 4. The external lugs facilitate fixing to the corresponding parts of the pump body, ensuring the integrated guide structure is securely installed within the pump body. This helps maintain the fixed position of the integrated guide structure, preventing axial movement and circumferential rotation during pump operation, ensuring pump reliability and hydraulic efficiency. 5. Return holes are provided on the side wall of the outer cylinder to cooperate with the self-priming return channel on the pump, enabling self-priming. Attached Figure Description

[0016] Figure 1 This is an exploded structural diagram of an integrated flow guiding structure (the inner cylinder, outer cylinder, and flow guiding cover explode open) involved in this utility model.

[0017] Figure 2 yes Figure 1 A schematic diagram of an explosion structure from another perspective.

[0018] Figure 3 This is an exploded structural diagram of an integrated flow guiding structure (the inner cylinder and the flow guiding cover are fitted together, and the outer cylinder explodes open) involved in this utility model.

[0019] Figure 4 This is a cross-sectional view of an integrated flow guiding structure involved in this utility model.

[0020] Figure 5This is a three-dimensional cross-sectional view of an integrated flow guiding structure in an explosive state, which is related to this utility model.

[0021] Figure 6 This is a three-dimensional cross-sectional structural diagram of the inner cylinder involved in this utility model.

[0022] Figure 7 This is a schematic diagram of the structure of a water pump involved in this utility model.

[0023] In the diagram: 1. Inner cylinder; 2. Guide cover; 3. Outer cylinder; 4. Central water inlet channel; 5. Guide wall; 6. Guide channel; 7. Guide port; 8. Stepped structure; 9. Installation notch; 10. Impeller cavity; 11. Outer lug; 12. Return hole; 13. Motor; 14. Pump body; 15. Impeller; 16. Pump inlet; 17. Pump outlet channel; 18. Self-priming return channel; 20. Outer cylinder; 21. Inlet cylinder; 22. Cover plate; 23. Positioning protrusion. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through embodiments and with reference to the accompanying drawings. In this document, the direction toward the impeller is referred to as "inner", and the direction toward the water inlet of the pump body is referred to as "outer".

[0025] Example 1: As Figures 1-7 As shown, an integrated flow guiding structure includes an inner cylinder 1, an outer cylinder 3, and a flow guiding cover 2 disposed in the inner cavity of the inner cylinder 1, all having a centrally connected water inlet channel 4. The inner cylinder 1, the flow guiding cover 2, and the outer cylinder 3 are an integrated structure. The inner sidewall of the outer end of the inner cylinder 1 is provided with a plurality of flow guiding walls 5 arranged in a centrally symmetrical vortex. The flow guiding cover 2 is fastened and fixed to the flow guiding wall 5. The outer sidewall of the flow guiding wall 5 and the outer sidewall of the flow guiding cover 2 are the inner sidewall of the flow guiding channel 6. The inner sidewall of the inner cylinder 1 is the outer sidewall of the flow guiding channel 6. The sidewall of the outer cylinder 3 is provided with a flow guiding port 7.

[0026] This technical solution integrates the existing guide vanes, return cover, and other structures into a single flow guide structure. This avoids problems such as poor assembly sealing or axial movement caused by accumulated tolerances between multiple components. It simplifies the structure, facilitates production and assembly, and improves assembly efficiency, reliability, and sealing. This reduces production and processing costs, ensures the hydraulic efficiency of the pump, and lowers equipment noise.

[0027] The inner cylinder 1, outer cylinder 3 and guide cover 2 can be produced independently first, and then fixed together to form an integrated structure by means of screw connection or welding (in this embodiment, ultrasonic welding is preferred).

[0028] In this technical solution, the guide wall 5 serves two purposes: firstly, it forms a guide channel 6 inside the inner cylinder 1; secondly, it facilitates fixation with the guide vane and makes the outer wall of the guide vane a part of the inner wall of the guide channel 6, ensuring that the guide channel 6 has sufficient axial length and can smoothly connect with the guide port 7 on the outer cylinder 3. During use, this facilitates smooth and unobstructed communication between the impeller cavity 10 at the inner end of the inner cylinder 1 and the water outlet channel on the pump body 14, reducing hydraulic losses, improving hydraulic efficiency, and minimizing noise generated during hydraulic loss, thereby effectively reducing the noise during pump operation.

[0029] The above technical solution will then be explained in detail:

[0030] In practical applications, each of the guide walls 5 corresponds to one of the guide channels 6. The inlet of the guide channel 6 is connected to the inner cavity of the inner cylinder 1, and the outlet of the guide channel 6 is connected to the guide port 7. That is, multiple guide walls 5 are formed on the inner sidewall of the inner cylinder 1, and multiple guide channels 6 are formed between the guide walls 5 (and the sidewalls of the guide vanes) and the inner sidewall of the inner cylinder 1.

[0031] In other words, in this technical solution, each guide channel 6 is isolated by each corresponding guide wall 5, making each guide channel 6 relatively independent. However, the inlet of each guide channel 6 is connected to the impeller cavity 10 at the inner end of the inner cylinder 1, and the outlet of each guide channel 6 is connected to the guide port 7 on the side wall of the outer cylinder 3. This allows each guide channel 6 to guide water relatively independently, reducing the possibility of eddies generated during the process of water flowing from the impeller 15 into the outlet channel of the pump body 14. This helps to reduce the hydraulic loss caused by eddies, and thus helps to improve the water flow efficiency, i.e., the working efficiency of the pump.

[0032] In practical applications, one end of the flow guide wall 5 is integrally formed with the inner sidewall of the inner cylinder 1, and the other end of the flow guide wall 5 extends in a vortex toward the middle of the inner cylinder 1. The outer sidewall of the flow guide cover 2 is fixed to the flow guide wall 5.

[0033] In this technical solution, the guide wall 5 and the guide cover 2 can be stably formed on the integrated guide structure. The guide wall 5, through the cooperation of the guide cover 2 and the outer cylinder 3, forms an integrated structure with the guide cover 2 and the outer cylinder 3. This helps to ensure the overall strength of the guide wall 5, avoid vibration during operation, and thus help to ensure pump efficiency and relatively low operating noise.

[0034] In practical applications, the inner end wall of the flow guide wall 5 has several axially arranged stepped structures 8, and the outer side wall of the flow guide cover 2 has several axially arranged mounting notches 9. The stepped structures 8 on the flow guide wall 5 correspond one-to-one with the mounting notches 9, and the outer side wall of the flow guide cover 2 and the outer side wall of each flow guide wall 5 form a flat inner side wall of the flow guide channel 6.

[0035] In this technical solution, the cooperation between the stepped structure 8 and the mounting notch 9 not only facilitates positioning and fixation, but also increases the connection area between the guide wall 5 and the guide cover 2, thereby increasing the connection strength. When the integrated guide structure is applied to the water pump, the cooperation between the stepped structure 8 and the mounting notch 9 can form axial and radial cooperation forces, which helps to ensure the reliability of the fixed cooperation between the stepped structure 8 and the mounting notch 9, thus helping to ensure the overall strength and operational reliability of the integrated guide structure.

[0036] In practical applications, the inner end cavity of the inner cylinder 1 is the impeller cavity 10, the central water inlet channel 4 on the inner cylinder 1 is used to cooperate with the water inlet of the impeller 15, the water outlet of the impeller cavity 10 corresponding to the water outlet of the impeller 15 is the water outlet channel on the inner cylinder 1, and the water outlet channel on the inner cylinder 1 is connected to the guide channel 6.

[0037] In this technical solution, the central water inlet channel 4 on the outer cylinder 3, the central water inlet channel 4 on the guide cover 2, and the central water inlet channel 4 on the guide cover 2 on the inner cylinder 1 are coaxially arranged and have compatible diameters (i.e., the same or approximately the same diameter; in this embodiment, the same diameter is preferred). This allows the integrated guide structure to be applied to the water pump, so that the water inlet of the impeller 15 located in the impeller cavity 10 is connected to the central water inlet channel 4, and the water inlet on the pump body 14 is connected to the water inlet of the impeller 15 through the central water inlet channel 4. A water outlet channel is formed between the water outlet of the impeller 15 and the inner cavity of the inner cylinder 1, and the water outlet channel is connected to the water outlet channel on the pump body 14 through the guide channel 6 on the inner cylinder 1.

[0038] In practical applications, at least one of the outer walls of the inner cylinder 1 and the outer cylinder 3 is provided with an external lug 11. The external lug 11 is an integral structure with the inner cylinder 1 and / or the outer cylinder 3. The external lug 11 is used to fix the corresponding part of the pump body 14.

[0039] In this technical solution, the external lug 11 can be an externally protruding block or ring or other externally protruding structure arranged at intervals. The external lug 11 is fixed to the corresponding part of the pump body 14, so that the integrated flow guide structure is fixed (i.e., detachably fixed) in the pump body 14. This helps to ensure that the integrated flow guide structure is fixed in position, avoids axial movement and circumferential rotation under the action of water flow when the water pump is running, and helps to ensure the reliability of the water pump and the hydraulic efficiency of the water pump.

[0040] In practical applications, a return hole 12 is provided on the side wall of the outer cylinder 3. The return hole 12 is used to cooperate with the self-priming return channel 18 on the pump body 14 to realize the self-priming function of the water pump.

[0041] In practical applications, the outer cylinder 3 includes an outer cylinder portion 20 and a water inlet cylinder portion 21 disposed in the inner cavity of the outer cylinder portion 20. The outer end of the water inlet cylinder portion 21 is radially folded outward to form an integral structure with the inner sidewall of the outer cylinder portion 20. The inner end of the water inlet cylinder portion 21 forms an integral structure with the top wall of the guide cover 2. The inner cavity of the water inlet cylinder portion 21 is the central water inlet channel 4 on the outer cylinder 3. The inner diameter of the central water inlet channel 4 on the water inlet cylinder portion 21 is adapted to the inner diameter of the central water inlet channel 4 on the guide cover 2.

[0042] In practical applications, the inner end of the water inlet cylinder 21 and the positioning protrusion 23 on the cover plate 22 of the guide cover 2 form a positioning fit. The central water inlet channel 4 is formed in the middle of the cover plate 22. The positioning protrusion 23 (a positioning ring or a positioning protrusion) is formed on the periphery of the central water inlet channel 4. The inner end of the water inlet cylinder 21 is inserted into the inner cavity surrounded by the positioning protrusion 23.

[0043] In this invention, the self-priming return channel 18 is directly formed on the outer cylinder 3, and the return hole 12 is located at the inner end of the self-priming return channel 18.

[0044] Example 2: Figures 1-7 As shown, the technical solution of the second technical subject matter involved in this utility model is as follows:

[0045] A water pump includes a motor 13, a pump body 14, an impeller 15 driven by the motor 13, and a flow guiding structure that cooperates with the impeller 15. The impeller 15 and the flow guiding structure are disposed in the pump cavity of the pump body 14. The pump body 14 is provided with a pump inlet 16 and a pump outlet channel 17 that communicate with the pump cavity.

[0046] The difference between this technical solution and the prior art is that: the flow guiding structure is the integrated flow guiding structure described in Embodiment 1; the impeller 15 is disposed in the impeller cavity 10 of the inner cylinder 1; the water inlet of the impeller 15 is connected to the central water inlet channel 4 in the flow guiding structure; the water outlet of the impeller 15 is connected to the water inlet of the flow guiding channel 6; the water outlet of the flow guiding channel 6 is connected to the pump outlet channel 17 on the pump body 14 through the flow guiding port 7 on the outer cylinder 3; and the water inlet of the central water inlet channel 4 in the flow guiding structure is connected to the pump inlet 16 on the pump body 14.

[0047] In practical applications, the pump body 14 is provided with a self-priming return channel 18, which is connected to the central water inlet channel 4 on the guide structure through the return hole 12 on the guide structure, so as to enable the water pump to complete the self-priming action.

[0048] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Various modifications and variations can be made to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated flow guiding structure, characterized in that... The device includes an inner cylinder (1), an outer cylinder (3), and a flow guide cover (2) disposed in the inner cavity of the inner cylinder (1), all having a central water inlet channel (4) connected in sequence. The inner cylinder (1), the flow guide cover (2), and the outer cylinder (3) are an integral structure. The inner sidewall of the outer end of the inner cylinder (1) is provided with several flow guide walls (5) arranged in a centrally symmetrical vortex. The flow guide cover (2) is fastened and fixed to the flow guide wall (5). The outer sidewall of the flow guide wall (5) and the outer sidewall of the flow guide cover (2) are the inner sidewall of the flow guide channel (6). The inner sidewall of the inner cylinder (1) is the outer sidewall of the flow guide channel (6). The sidewall of the outer cylinder (3) is provided with a flow guide port (7).

2. The integrated flow guiding structure according to claim 1, characterized in that... Each of the flow guide walls (5) corresponds to and is matched with each of the flow guide channels (6). The inlet of the flow guide channel (6) is connected to the inner cavity of the inner cylinder (1), and the outlet of the flow guide channel (6) is connected to the flow guide port (7).

3. The integrated flow guiding structure according to claim 2, characterized in that... One end of the guide wall (5) is integrally formed with the inner sidewall of the inner cylinder (1), and the other end of the guide wall (5) extends in a vortex toward the middle of the inner cylinder (1). The outer sidewall of the guide cover (2) is fixed to the guide wall (5).

4. The integrated flow guiding structure according to claim 3, characterized in that... The inner end wall of the guide wall (5) has several axially arranged stepped structures (8), and the outer side wall of the guide cover (2) has several axially arranged mounting notches (9). The stepped structures (8) on the guide wall (5) correspond to the mounting notches (9) one by one. The outer side wall of the guide cover (2) and the outer side wall of each guide wall (5) form the inner side wall of a flat guide channel (6).

5. The integrated flow guiding structure according to claim 4, characterized in that... The inner end cavity of the inner cylinder (1) is the impeller cavity (10). The central water inlet channel (4) on the inner cylinder (1) is used to cooperate with the water inlet of the impeller (15). The water outlet of the impeller cavity (10) corresponding to the water outlet of the impeller (15) is the water outlet channel on the inner cylinder (1). The water outlet channel on the inner cylinder (1) is connected to the guide channel (6).

6. The integrated flow guiding structure according to any one of claims 1-5, characterized in that... At least one of the inner cylinder (1) and the outer cylinder (3) is provided with an external lug (11), the external lug (11) is an integral structure with the inner cylinder (1) and / or the outer cylinder (3), and the external lug (11) is used to fix to the corresponding part of the pump body (14).

7. The integrated flow guiding structure according to any one of claims 1-5, characterized in that... A reflux hole (12) is provided on the side wall of the outer cylinder (3), and the reflux hole (12) is used to cooperate with the self-priming reflux channel on the pump body (14).

8. The integrated flow guiding structure according to any one of claims 1-5, characterized in that... The outer cylinder (3) includes an outer cylinder part (20) and a water inlet cylinder part (21) disposed in the inner cavity of the outer cylinder part (20). The outer end of the water inlet cylinder part (21) is radially folded outward to form an integral structure with the inner sidewall of the outer cylinder part (20). The inner end of the water inlet cylinder part (21) forms an integral structure with the top wall of the guide cover (2). The inner cavity of the water inlet cylinder part (21) is the central water inlet channel (4) on the outer cylinder (3). The inner diameter of the central water inlet channel (4) on the water inlet cylinder part (21) is adapted to the inner diameter of the central water inlet channel (4) on the guide cover (2).

9. A water pump, comprising a motor (13), a pump body (14), an impeller (15) driven by the motor (13), and a flow guiding structure cooperating with the impeller (15), wherein the impeller (15) and the flow guiding structure are disposed in the pump cavity of the pump body (14), and the pump body (14) is provided with a pump inlet (16) and a pump outlet channel (17) communicating with the pump cavity, characterized in that... The flow guiding structure is an integrated flow guiding structure as described in any one of claims 1-8. The impeller (15) is disposed in the impeller cavity (10) of the inner cylinder (1). The inlet of the impeller (15) is connected to the central water inlet channel (4) in the flow guiding structure. The outlet of the impeller (15) is connected to the inlet of the flow guiding channel (6). The outlet of the flow guiding channel (6) is connected to the pump outlet channel (17) on the pump body (14) through the flow guiding port (7) on the outer cylinder (3). The inlet of the central water inlet channel (4) in the flow guiding structure is connected to the pump inlet (16) on the pump body (14).

10. The water pump according to claim 9, characterized in that... The pump body (14) is provided with a self-priming return channel (18), which is connected to the central water inlet channel (4) on the guide structure through the return hole (12) on the guide structure.

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