Submersible tubular pump blade adjusting structure

Abstract

The utility model provides a submersible tubular pump blade adjusting structure, which relates to the technical field of submersible tubular pumps and is characterized in that a plurality of threaded holes are formed in the outer surface of a hub body, screws are in threaded connection with the interiors of the threaded holes, gaskets are sleeved on the outer surfaces of the screws, a plurality of U-shaped holes are formed in the outer surfaces of blades, and the U-shaped holes are in threaded connection with the interiors of the U-shaped holes. A plurality of round pin columns are arranged on the outer surface of the hub body. The adjusting structure has the advantages of being simple in structure, low in machining cost, convenient to install, safe and reliable, counter bores in the blade handles are changed into the U-shaped holes, a connecting plate is omitted, and the threaded holes are formed in the hub body to fix the blades. The design parameter range of the hub ratio is enlarged while the angles of the blades are adjusted, so that the requirements of different parameters of the water pump are met, and the operation efficiency and cavitation resistance of the water pump are improved.

Description

Technical Field

[0001] This utility model relates to the field of submersible axial flow pump technology, and in particular to a submersible axial flow pump blade adjustment structure. Background Technology

[0002] Submersible axial flow pumps are mainly used for drainage and irrigation, pumping stations, and water intake from rivers. They are characterized by large flow rate and low head.

[0003] In existing technologies, traditional submersible axial flow pumps utilize the characteristic that the connecting plate can rotate with the blades to ensure that the blade angle can be adjusted within a wide range. However, due to the small internal space of the hub, it is difficult to align the holes on the connecting plate and the blade shank, requiring a certain amount of operating space. Especially for large axial flow pumps, the nuts need to be tightened through the internal space of the hub. These operations bring a series of inconveniences to workers. At the same time, in order to accommodate the connecting plate and the nuts, the internal space of the hub needs to be increased accordingly, and the outer diameter of the hub will also increase, thus increasing the manufacturing and processing costs of the hub. Utility Model Content

[0004] The purpose of this invention is to address the problem that in existing submersible axial flow pumps, the connecting plate rotates with the blades to ensure a wide range of blade angle adjustment. However, due to the small internal space of the hub, aligning the holes on the connecting plate and the blade shank is difficult and requires a certain amount of operating space. This is especially true for large axial flow pumps, where the nuts need to be tightened through the internal space of the hub. These operations bring a series of inconveniences to workers. In addition, in order to accommodate the connecting plate and the nuts, the internal space of the hub needs to be increased accordingly, and the outer diameter of the hub will also increase, thus increasing the manufacturing and processing costs of the hub. Therefore, this invention proposes a blade adjustment structure for submersible axial flow pumps.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a submersible axial flow pump blade adjustment structure, including a hub body: the outer surface of the hub body is provided with multiple threaded holes, each of the multiple threaded holes is threaded with a screw, the outer surface of each of the multiple screws is fitted with a washer, the outer surface of the blade is provided with multiple U-shaped holes, and the outer surface of the hub body is provided with multiple round pins.

[0006] Preferably, the plurality of screws are respectively matched with the plurality of U-shaped holes.

[0007] Preferably, the hub body and the blade are configured in a matching manner.

[0008] Preferably, the washer is located inside the U-shaped hole.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0010] In this utility model, the adjustment structure has the characteristics of simple structure, low processing cost, convenient installation, and safety and reliability. The countersunk hole on the blade shank is replaced with a U-shaped hole, the connecting plate is eliminated, and a threaded hole is opened on the hub body to fix the blade. This ensures that the design parameter range of the hub ratio is increased while the blade angle is adjusted, thereby meeting the needs of different parameters of the water pump, improving the efficiency of water pump operation and the anti-cavitation performance of the water pump. Attached Figure Description

[0011] Figure 1 A schematic diagram of adjusting and fixing the blades of a traditional small submersible axial flow pump;

[0012] Figure 2 A schematic diagram of adjusting and fixing the blades of a traditional large submersible axial flow pump;

[0013] Figure 3 This utility model provides a schematic diagram of a submersible axial flow pump blade adjustment structure;

[0014] Figure 4 This utility model provides a schematic diagram of the blade angle adjustment range of a submersible axial flow pump blade adjustment structure.

[0015] Illustration: 1. Hub body; 2. Cylindrical pin; 3. Blade; 4. Screw; 5. Washer; 6. U-shaped hole. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0018] Example 1, such as Figures 1-4 As shown, this utility model provides a submersible axial flow pump blade adjustment structure, including a hub body: the outer surface of the hub body has multiple threaded holes, each of the multiple threaded holes is threaded with a screw, and each of the multiple screws is fitted with a washer on its outer surface; the outer surface of the blade has multiple U-shaped holes; the outer surface of the hub body is provided with multiple round pins; the multiple screws are respectively matched with the multiple U-shaped holes; the hub body and the blade are matched; and the washer is located inside the U-shaped hole.

[0019] The overall effect achieved by Example 1 is as follows: Figure 1A schematic diagram of adjusting and fixing blades for a traditional small submersible axial flow pump: After the angle of blade 2 is determined, the blade is fixed to the hub body with screws, washers, cylindrical pins, and connecting plates; Figure 2 A schematic diagram illustrating the adjustment and fixing of blades in a traditional large submersible axial flow pump: After the blade angle is determined, the blades are fixed to the hub body using studs, nuts, washers, cylindrical pins, and connecting plates. Figure 3 and Figure 1 and Figure 2 The difference lies in the fact that the countersunk hole on the blade 3 shank is replaced with a U-shaped hole, the connecting plate is eliminated, and a threaded hole is opened on the hub body 1 to fix the blade 3. The blade 3 is fixed to the hub body by a cylindrical pin 2, a screw 4, and a washer 5. When the angle of the blade 3 needs to be adjusted, the cylindrical pin 2, screw 4, and washer 5 are first removed. Then, the blade 3 is adjusted to the required angle according to the height difference, and then the cylindrical pin 2, screw 4, and washer 5 are used to fix the blade 3. Since the blade 3 shank has a U-shaped hole 6, the screw 4 and washer 5 can still fix the blade 3 to the hub body 1 through the U-shaped hole 6 after the blade 3 rotates a large angle range. This ensures that the blade 3 can be adjusted at the same time as the hub ratio design parameter range, thereby meeting the needs of different parameters of the water pump, improving the efficiency of water pump operation and the anti-cavitation performance of the water pump, and so on. Figure 4 As shown, the maximum adjustment angle range of blade 3 can be from -8° to +8°.

[0020] Working principle: Blade 3 is fixed to the hub body by cylindrical pin 2, screw 4, and washer 5. When the angle of blade 3 needs to be adjusted, first remove cylindrical pin 2, screw 4, and washer 5. Then, adjust blade 3 to the required angle according to the height difference, and then fix blade 3 with cylindrical pin 2, screw 4, and washer 5. Since the blade 3 shank has a U-shaped hole 6, screw 4 and washer 5 can still fix blade 3 to hub body 1 through the U-shaped hole 6 of blade 3 shank after blade 3 rotates a large angle range, thus ensuring that blade 3 can be adjusted at the same angle.

[0021] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A submersible axial flow pump blade adjustment structure, characterized in that, Includes a hub body (1): the outer surface of the hub body (1) is provided with multiple threaded holes, and screws (4) are threaded into the interior of each of the multiple threaded holes. Washers (5) are fitted on the outer surface of each of the multiple screws (4). Multiple U-shaped holes (6) are provided on the outer surface of the blade (3). Multiple round pins (2) are provided on the outer surface of the hub body (1).

2. The submersible axial flow pump blade adjustment structure according to claim 1, characterized in that: The screws (4) are respectively matched with the U-shaped holes (6).

3. The submersible axial flow pump blade adjustment structure according to claim 2, characterized in that: The hub body (1) and the blade (3) are configured in a matching manner.

4. The submersible axial flow pump blade adjustment structure according to claim 3, characterized in that: The washer (5) is located inside the U-shaped hole (6).

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