CN-122014686-A - Disassembling tool for open impeller of centrifugal pump

CN122014686ACN 122014686 ACN122014686 ACN 122014686ACN-122014686-A

Abstract

The invention relates to the technical field of centrifugal pump maintenance, in particular to a disassembling tool for an open impeller of a centrifugal pump, which comprises a chuck, a plurality of clamping columns, a locking mechanism and a handle, wherein the clamping columns are distributed along the circumferential direction of the chuck, each clamping column can be independently arranged on the chuck in a moving manner along the radial direction of the chuck, each clamping column is provided with a clamping section used for being contacted with the side surface of a blade of the open impeller, the clamping section is provided with a nonmetallic protection liner, the locking mechanism is used for independently locking each clamping column at different radial positions on the chuck, and the handle is fixedly connected with the chuck. Therefore, the problems that in the prior art, the disassembly scheme of the centrifugal pump open impeller mechanism is inconvenient to operate, difficult to disassemble, and easy to damage key parts and has potential safety hazards are solved.

Inventors

WANG HUAJIAN
CHEN LUJUN
Wan Jiankang
WU JIANG
DAI MIN

Assignees

中昊晨光化工研究院有限公司
中化蓝天集团有限公司

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (10)

1. A removal tool for an open impeller of a centrifugal pump, comprising: A chuck; The clamping columns are distributed along the circumferential direction of the chuck, each clamping column can be independently and movably arranged on the chuck along the radial direction of the chuck, each clamping column is provided with a clamping section used for being contacted with the side surface of a blade of the open impeller, and each clamping section is provided with a nonmetallic protective liner; A locking mechanism for locking each of the clamping posts independently at different radial positions on the chuck, and And the handle is fixedly connected with the chuck.
2. The removal tool for an open impeller of a centrifugal pump of claim 1, wherein the inner diameter of the chuck is larger than the outer diameter of the inducer of the centrifugal pump to be removed and the outer diameter of the chuck is smaller than the outer diameter of the open impeller to be removed.
3. The removing tool for an open impeller of a centrifugal pump according to claim 1, wherein the locking mechanism comprises a plurality of strip-shaped kidney-shaped holes provided on the chuck and a plurality of locking pieces in one-to-one correspondence with the kidney-shaped holes, and a length direction of each of the kidney-shaped holes extends in a radial direction of the chuck; the clamping columns penetrate through the corresponding kidney-shaped holes and are locked and fixed with the chuck through locking pieces.
4. A removal tool for an open impeller of a centrifugal pump as claimed in claim 3, wherein the locking member is a screw, and the clamping post is provided with a threaded hole which is matched with the screw.
5. The disassembling tool for an open impeller of a centrifugal pump according to claim 3, wherein the clamping column comprises an integrally formed insertion section, a pressing section and a clamping section, the insertion section is used for being inserted into the kidney-shaped hole and connected with the locking piece, the pressing section is larger than the kidney-shaped hole in size so as to be pressed against the chuck, and the clamping section is provided with the protection gasket.
6. The removing tool for an open impeller of a centrifugal pump according to claim 5, wherein the insertion section has a long strip shape, a long side of which has a size larger than a diameter of the kidney-shaped hole and a short side of which has a size smaller than the diameter of the kidney-shaped hole, so that the insertion section can move only in a length direction of the kidney-shaped hole in the kidney-shaped hole.
7. The removal tool for an open impeller of a centrifugal pump of claim 1, wherein the material of the protective liner is polyvinylidene fluoride or nylon.
8. The removal tool for an open impeller of a centrifugal pump of claim 1, wherein the protective liner is removably mounted to the clamping section of the clamping post.
9. The removal tool for an open impeller of a centrifugal pump of claim 1, wherein the number of clamping posts is at least three and is evenly distributed along the circumference of the chuck.
10. The removal tool for an open impeller of a centrifugal pump of any one of claims 1-9, wherein the handle is welded to the chuck.

Description

Disassembling tool for open impeller of centrifugal pump Technical Field The invention relates to the technical field of maintenance of centrifugal pumps, in particular to a disassembling tool for an open impeller of a centrifugal pump. Background The open impeller mechanism in the centrifugal pump can realize higher conveying efficiency under the working condition of high rotating speed due to the structural characteristics of the open impeller mechanism, and is widely applied to the industrial fields of petrochemical industry, energy power and the like. At present, an open impeller and an induced impeller of the pump are usually arranged on a rotating shaft in a fastening mode such as threads, and the centrifugal force and the axial force generated by high-speed rotation are relied on in the running process, so that the self-tightening effect is generated between the impeller and related matching parts. Although the self-tightening effect is beneficial to ensuring the structural stability and the tightness during operation, the self-tightening effect also brings difficulty to the disassembly work during regular maintenance or fault replacement. The existing disassembly method generally depends on a single fixed disassembly point preset in an assembly stage of a pump production plant. This point is typically located at the narrow gap between the open impeller and the inducer impeller, and the whole pump is provided with only this one stressed position. In the actual disassembly process, an operator needs to use a special tool or a general tool (such as a spanner, a puller and the like) to act on the point, and try to apply a reverse moment or pulling force to the impeller to overcome the self-tightening force. However, due to the mating surface compression force after high rotational speed operation, the disassembly torque provided by a single stress point is often insufficient, so that the impeller is difficult to loosen. To accomplish disassembly, field maintenance personnel are often forced to resort to unusual means such as extension levers, hammer strokes, forced prying, and the like. The method has the defects that firstly, concentrated and overlarge local stress is extremely easy to cause mechanical damage such as plastic deformation, cracks or collapse and the like of precise components such as an open impeller blade, a hub or an induced impeller, the pneumatic performance and dynamic balance precision of the impeller are seriously affected, the pump efficiency is reduced, vibration is increased, secondly, when a lengthening tool is used for applying force in a narrow space, unexpected situations such as tool slipping, sudden part collapse and the like are easy to occur, the personal safety of operators is threatened, and industrial accidents caused by the situations are caused on site, and furthermore, a single dismounting point is worn or deformed due to repeated dismounting, the reliability of the rotor assembly is further reduced, even the dismounting function is lost, and the whole rotor assembly is scrapped. Therefore, the disassembly scheme of the centrifugal pump open impeller mechanism in the prior art has the problems of inconvenient operation, difficult disassembly, easy damage to key parts and potential safety hazard. Therefore, there is a need for an improved and optimized structure of the present disassembly tool, which can facilitate the application of force, effectively disperse the disassembly load, thereby protecting the integrity of the components and ensuring the operation safety. Disclosure of Invention The invention aims to provide a disassembling tool for an open impeller of a centrifugal pump, which is used for solving the problems that in the disassembly scheme of an open impeller mechanism of the centrifugal pump in the prior art, the operation is inconvenient, the disassembly is difficult, key parts are easy to damage and potential safety hazards exist. In order to achieve the above purpose, the present invention provides the following technical solutions: A removal tool for an open impeller of a centrifugal pump, comprising: A chuck; The clamping columns are distributed along the circumferential direction of the chuck, each clamping column can be independently and movably arranged on the chuck along the radial direction of the chuck, each clamping column is provided with a clamping section used for being contacted with the side surface of a blade of the open impeller, and each clamping section is provided with a nonmetallic protective liner; A locking mechanism for locking each of the clamping posts independently at different radial positions on the chuck, and And the handle is fixedly connected with the chuck. Optionally, the inner edge diameter of the chuck is larger than the outer diameter of an inducer of the centrifugal pump to be disassembled, and the outer edge diameter of the chuck is smaller than the outer edge diameter of the open impeller to be disassembled. O