Disassembling and assembling tool for threaded impeller

Abstract

The utility model relates to a dismounting tool for a threaded impeller, which belongs to the field of maintenance tools for mechanical equipment and comprises a turning hub seat, a spinning blade (2) and a polygonal barrel (14). The turning hub seat comprises a base (1) and a sleeve (10). The base (1), the sleeve (10) and the polygonal barrel (14) are sequentially connected from right to left, and a shaft hole communicated with the sleeve (10) and the polygonal barrel (14) is formed in the base (1); the spinning slurry sheet (2) is detachably connected with the base (1); according to the thread impeller dismounting tool, safe dismounting of a high thread impeller, especially a closed thread impeller can be achieved, the impeller is not prone to being damaged or damaged, the thread impeller dismounting tool has the advantages of being compact in structure, convenient to mount and easy to operate, the safety of mounting and dismounting of the thread impeller can be greatly improved, and damage caused by overhauling is effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment maintenance tools, specifically, it relates to a tool for disassembling and assembling threaded impellers. Background Technology

[0002] Centrifugal pumps are widely used in industrial production, especially in the chemical industry, where they are an indispensable piece of equipment. Their working principle involves using the centrifugal force generated by a high-speed rotating impeller to energize and flow the liquid medium, thus achieving the transport of the liquid. A centrifugal pump mainly consists of components such as a pump casing, impeller, main shaft, pump cover, bearings, seals, intermediate supports, and suspension components.

[0003] The impeller is a crucial component of a centrifugal pump, responsible for energizing the transported medium and thus enabling its transport. Based on structural design, impellers are classified into three types: open impellers, semi-open impellers, and closed impellers. Furthermore, based on their installation method with the main shaft, impellers are divided into keyway impellers and threaded impellers. Due to their advantages such as high energizing power, high efficiency, and strong anti-loosening performance, closed threaded impellers are widely used in applications requiring high speed, high pressure, large head, and large flow rate for transporting media with low solid particle content.

[0004] A closed-type threaded impeller, as the name suggests, is a closed impeller with a disc, blades, and cover plate, and is threadedly connected to the main shaft. The threads of a threaded impeller are typically left-handed, meaning the thread direction is opposite to the direction of rotation of the main shaft. This ensures that if the main shaft and impeller move relative to each other due to excessive resistance during pump operation, the impeller will tighten further, preventing loosening or detachment and effectively avoiding pump failure. While threaded impellers offer strong anti-loosening capabilities and high installation reliability, maintenance is extremely inconvenient. After operation, the impeller and main shaft become very tightly fitted, making disassembly very difficult. Currently, no practical and effective disassembly tool has been found; simple tools such as pry bars and steel chisels are still used to insert into the impeller's flow channel for manipulation. This method is crude and results in single-point force on the impeller, leading to poor disassembly results, difficulty in removing the impeller, and potential damage to the impeller, thus reducing pump efficiency.

[0005] For example, when the mechanical seal of the engineering plastic centrifugal pump in the absorption circulation tank leaks, during the maintenance and replacement of the mechanical seal, a pry bar is used to insert into the closed threaded impeller flow channel to turn and remove the impeller. At this time, there is a problem that it cannot be turned. Once it cannot be turned, the impeller cannot be removed, and the mechanical seal cannot be replaced. If it is forcibly turned, it will cause damage to the impeller and pose a risk of equipment damage. Summary of the Invention

[0006] To overcome the problems existing in the background technology, this utility model provides a threaded impeller disassembly and assembly tool, which can safely disassemble threaded impellers, especially closed threaded impellers, without easily causing damage to the impeller. It also features a compact structure, convenient installation, and simple operation, which can greatly improve the safety of threaded impeller installation and disassembly and effectively avoid damage caused by maintenance.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0008] The aforementioned threaded impeller assembly and disassembly tool includes a rotating hub, a spinning blade, and a polygonal cylinder; the rotating hub includes a base and a sleeve; the base, sleeve, and polygonal cylinder are connected sequentially from right to left, and the base has a shaft hole that communicates with the sleeve and the polygonal cylinder; the spinning blade is detachably connected to the base.

[0009] Preferably, the base has circumferentially distributed blade mounting slots on its left end face; the blade mounting slot area has positioning threaded holes; the spun blade has a recessed platform that matches the blade mounting slots and the base; the recessed platform has a waist-shaped hole; the spun blade and the base are connected by positioning screws.

[0010] Preferably, the threaded impeller disassembly and assembly tool further includes a locking chuck; the base is also provided with a locking threaded hole; the locking threaded hole avoids the opening of the blade mounting slot; the locking chuck is a flange structure; the recess of the spun blade is clamped between the locking chuck and the base by a positioning screw and a locking bolt; wherein, the positioning screw is connected to the positioning threaded hole, and the locking bolt is connected to the locking threaded hole.

[0011] Preferably, the positioning screw is a double-ended bolt structure and is fitted with a clamping nut.

[0012] Preferably, the threaded impeller assembly and disassembly tool also includes a wrench; the wrench is compatible with the polygonal cylinder.

[0013] Preferably, the base, sleeve, and polygonal cylindrical body are integral structures or welded together.

[0014] The beneficial effects of this utility model are:

[0015] This invention enables the safe removal of threaded impellers, especially closed threaded impellers, without easily causing damage to the impeller. It also features a compact structure, convenient installation, and simple operation, which greatly improves the safety of threaded impeller installation and disassembly, and effectively avoids damage caused by maintenance.

[0016] In operation, this utility model only requires inserting the rotating hub into the water pump main shaft, then installing the spinning impeller (for closed impellers, it is pinned in from inside the impeller flow channel), locking the chuck, and using the positioning screw, locking bolt, and clamping nut to fix and lock the spinning impeller onto the rotating hub. Then, the threaded impeller can be disassembled and assembled by using a heavy-duty wrench. This fills the gap in the field of disassembly and assembly tools for threaded impellers, especially closed threaded impellers. Moreover, during disassembly and assembly, the impeller is subjected to force at multiple points, solving the technical problems of current threaded impeller disassembly and assembly tools being simple, rough in operation, subject to single-point force on the impeller, difficult to disassemble, and prone to impeller damage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the rotating hub structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the spinning blade structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the locking chuck structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the heavy-duty wrench of this utility model;

[0022] Figure 6 This is a schematic diagram of the closed-loop threaded impeller structure related to this utility model;

[0023] Figure 7 This is a schematic diagram of the usage state of this utility model;

[0024] In the diagram, 1-base; 11-blade mounting slot; 12-positioning threaded hole; 13-locking threaded hole; 14-hexagonal cylinder; 2-spun blade; 21-recessed platform; 22-waist-shaped hole; 3-locking chuck; 4-power wrench; 5-positioning screw; 6-clamping nut; 7-locking bolt; 8-closed threaded impeller; 81-disc; 82-blade; 83-cover plate; 84-flow channel; 85-threaded mounting hole; 9-main shaft; 10-sleeve. Detailed Implementation

[0025] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0026] In the description of this utility model, unless otherwise stated, the terms "left", "right", etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] like Figure 1-6 As shown, the threaded impeller disassembly and assembly tool includes a rotating hub seat, a spinning impeller 2, a polygonal cylinder 14, and a heavy-duty wrench 4. The rotating hub seat includes a base 1 and a sleeve 10, wherein the base 1, sleeve 10, and polygonal cylinder 14 are connected sequentially from right to left, and the three are integrally machined or welded structures. The base 1 has a shaft hole that passes through the sleeve 10 and the polygonal cylinder 14.

[0029] The outer diameter of base 1 is larger than that of sleeve 10, and it is located on the left side of base 1 (within). Figure 2 The end face of the base 1 has circumferentially distributed blade mounting slots 11, and positioning threaded holes 12 are provided in the blade mounting slot area. The spun blade 2 has a recessed platform 21 that matches the blade mounting slots 11 and the base 1. The recessed platform 21 is engaged in the blade mounting slots 11, and the outer edge of the recessed platform is in contact with the outer edge of the base 1. The recessed platform 21 has a waist-shaped hole 22.

[0030] The base 1 is also provided with a locking threaded hole 13; the locking threaded hole 13 is provided to avoid the area of ​​the blade mounting slot 11; the locking chuck 3 is a flange structure, with threaded holes that are directly opposite the locking threaded hole 13 and the positioning threaded hole 12. The positioning screw 5 passes through the flange hole, the waist-shaped hole 22 and the positioning threaded hole 12 of the locking chuck 3 to clamp the spun blade 2 between the locking chuck 3 and the base 1. The locking bolt 7 passes through the flange hole and the locking threaded hole 13 of the locking chuck 3 to further clamp the spun blade 2. The positioning screw 5 is a double-ended bolt structure, with a clamping nut 6 installed at each end.

[0031] The heavy-duty wrench 4 is matched with the polygonal cylinder 14.

[0032] Demonstration of the working process of this utility model:

[0033] (1) Assemble and disassemble the closed-type threaded impeller

[0034] Insert the rotating hub from right to left onto the shaft end of the centrifugal pump main shaft 9, ensuring it aligns with the left end of the impeller disc; 1) Insert the spun impeller 2 through the impeller flow channel cavity into the impeller mounting slot embedded in the right end of the rotating hub; 2) Screw the positioning screw 5 through the slotted hole on the spun impeller 2 into the positioning threaded hole 12 of the rotating hub; 3) Repeat steps 1) and 2) until the required 3 spun impeller 2 pieces are installed; 4) Insert the locking chuck 3 onto the main shaft shaft end, ensuring the positioning threaded hole 12 passes through the positioning screw 5 and its right end face is in contact with the spun impeller 2; 5) Tighten the nut. 6) Screw in the positioning screw 5 to tighten the locking chuck 3; 6) Screw the right end thread of the locking bolt 7 through the threaded hole of the locking chuck into the locking threaded hole on the right side of the rotating hub to tighten the locking chuck 3; 7) Insert the opening of the wrench 4 into the hexagonal cylinder 14 on the left side of the rotating hub; 8) Secure the centrifugal pump main shaft 9 to prevent it from rotating; 9) Turn the wrench 4 clockwise to rotate the hub, causing the back of the spinning blade 2 to press against the ventral surface of the impeller blade. The torque is transmitted through the spinning blade 2 to the impeller blade, forcing the impeller to rotate relative to the main shaft, thereby achieving the disassembly of the impeller.

[0035] This utility model relates to the assembly, installation, and locking of a closed-type threaded impeller:

[0036] Insert the rotating hub from right to left onto the centrifugal pump main shaft end, aligning it with the left end of the impeller disk; 1) Insert the spun blade 2 through the impeller flow channel cavity into the blade mounting slot embedded in the right end of the rotating hub; 2) Screw the positioning screw 5 through the waist-shaped slot on the spun blade 2 into the positioning threaded hole 12 of the rotating hub; 3) Repeat steps 1) and 2) until the required 3 spun blades are installed; 4) Insert the locking chuck 3 onto the main shaft end, ensuring the positioning screw hole passes through the positioning screw and keeps the right end face in contact with the spun blade 2; 5) Tighten the clamping nut 6 into the positioning screw 5. 6) Tighten the locking chuck 3; 7) Screw the right end of the locking bolt 7 through the threaded hole of the locking chuck 3 into the locking threaded hole 13 of the rotating hub seat to tighten the locking chuck 3 and complete the assembly of this utility model; 8) Insert the opening of the wrench 4 into the hexagonal cylinder 14; 9) Secure the centrifugal pump main shaft 9 to prevent it from rotating; 10) Turn the wrench 4 counterclockwise to rotate the hub seat and press the bow of the spinning blade 2 against the bow of the impeller blade. The torque is transmitted to the impeller blade through the spinning blade, forcing the impeller to rotate relative to the main shaft, thereby realizing the installation and locking of the closed thread impeller.

[0037] Disassembly of this utility model:

[0038] 1) Disconnect the locking jaws of the wrench 4 from the hexagonal cylinder 14 of the hub seat and remove the wrench 4; 2) Use a tool to turn the hexagonal head of the locking bolt counterclockwise to loosen and remove the locking bolt 7; 3) Use a tool to turn the clamping nut 6 counterclockwise to loosen and remove the clamping nut 6; 4) After the locking bolt 7 and clamping nut 6 are completely removed, remove the locking chuck 3; 5) Use a suitable tool to loosen and remove the positioning screw 5; 6) Remove the spinning blade 2 from the impeller flow channel cavity; 7) Repeat steps 4) and 5) to completely remove the spinning blade 2; 8) Remove the hub seat from the centrifugal pump main shaft 9. The dismantling of this utility model is now complete.

[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A tool for disassembling and assembling a threaded impeller, characterized in that, It includes a rotating hub, a spinning blade (2), and a polygonal cylinder (14); the rotating hub includes a base (1) and a sleeve (10); the base (1), sleeve (10), and polygonal cylinder (14) are connected sequentially from right to left, and the base (1) has a shaft hole that communicates with the sleeve (10) and polygonal cylinder (14); the spinning blade (2) is detachably connected to the base (1).

2. The threaded impeller disassembly and assembly tool according to claim 1, characterized in that, The base (1) has a circumferentially distributed blade mounting slot (11) on its left end face; the blade mounting slot area has a positioning threaded hole (12); the spun blade (2) has a recess (21) that matches the blade mounting slot (11) and the base (1); the recess (21) has a waist-shaped hole (22); the spun blade (2) and the base (1) are connected by a positioning screw (5).

3. The threaded impeller disassembly and assembly tool according to claim 2, characterized in that, It also includes a locking chuck (3); a locking threaded hole (13) is also provided on the base (1); the locking threaded hole (13) is provided to avoid the area of ​​the blade mounting slot (11); the locking chuck (3) is a flange structure; the recess (21) of the spun blade (2) is clamped between the locking chuck (3) and the base (1) by a positioning screw (5) and a locking bolt (7); wherein, the positioning screw (5) is connected to the positioning threaded hole (12); the locking bolt (7) is connected to the locking threaded hole (13).

4. The threaded impeller disassembly and assembly tool according to claim 2 or 3, characterized in that, The positioning screw (5) is a double-headed bolt structure and is fitted with a clamping nut (6).

5. The threaded impeller disassembly and assembly tool according to claim 1, characterized in that, It also includes a wrench (4); the wrench (4) is matched with the polygonal cylinder (14).

6. The threaded impeller disassembly and assembly tool according to claim 1, characterized in that, The base, sleeve, and polygonal cylindrical body are either an integral structure or welded together.

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