Disassembling tool for impeller top sleeve

Abstract

The utility model relates to a dismounting tool for an impeller top sleeve, which comprises a sleeve, two ends of the sleeve are of penetrating structures, a plurality of positioning threaded holes surrounding the sleeve are arranged on the outer wall of one end of the sleeve, a plurality of handles surrounding the sleeve are connected on the outer wall of the other end of the sleeve, and positioning screws are in threaded connection in the positioning threaded holes. A nut is arranged at the end, away from the sleeve, of the positioning screw. The pump shaft penetrates through the interior of the sleeve, so that the sleeve moves to the position where the top sleeve is located, the positioning threaded hole of the sleeve is aligned with the threaded hole of the top sleeve, then the positioning screw is screwed into the positioning threaded hole, the nut of the screw is tightened through a wrench, and the screw can be connected with the positioning threaded hole of the sleeve and the threaded hole of the top sleeve; and finally, the sleeve is rotated through the handle and drives the top sleeve to rotate, so that the top sleeve is unscrewed and screwed out of the pump shaft, the disassembly time is greatly saved, the efficiency is high, the top sleeve cannot be damaged, and meanwhile, the flammable and explosive safety risk is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of disassembly equipment, in particular to a disassembly tool for an impeller top sleeve. Background Art

[0002] Many equipment in petrochemical industry use multi-stage centrifugal pumps to transport various liquids. They have simple structure, high efficiency, stable operation and adaptability to various working conditions. Multi-stage centrifugal pumps are composed of two or more impellers, which are installed in series on the same pump shaft. Positioning sleeves and partitions are provided between the impellers. A threaded top sleeve is installed behind the last-stage impeller. When installing, the top sleeve is rotated to engage with the pump shaft thread and screwed to the end face of the impeller. Then, the top sleeve is fixed to the pump shaft by screws to prevent the impeller from axial loosening and causing collision and wear during operation. When the rotor is usually maintained, since the rotor is installed in the pump casing, the space inside the casing is small and maintenance is very difficult. The rotor needs to be pulled out of the pump casing for maintenance. The last-stage impeller needs to be disassembled before the rotor can be pulled out. The last-stage impeller can only be disassembled after the top sleeve is disassembled.

[0003] Today's multi-stage centrifugal pumps come into contact with the medium during operation, which causes coking between the pump shaft and the top sleeve, making it difficult to disassemble the top sleeve. Usually, a knocking tool is used to loosen the top sleeve first, and then the top sleeve is twisted out. It takes a lot of time to disassemble, which is not only inefficient and easy to damage the top sleeve. At the same time, the sparks generated by knocking on the top sleeve pose a safety risk of flammability and explosion. Utility Model Content

[0004] The purpose of the utility model is to design a disassembly tool for an impeller top sleeve, so as to solve the problems mentioned in the background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A disassembly tool for an impeller top sleeve comprises a sleeve, wherein both ends of the sleeve are through structures, a plurality of positioning threaded holes surrounding the sleeve are provided on the outer wall of one end of the sleeve, a plurality of handles surrounding the sleeve are connected to the outer wall of the other end, a positioning screw is threadedly connected to the inner thread of the positioning threaded hole, and a nut is provided on the end of the positioning screw away from the interior of the sleeve.

[0007] Furthermore, the positioning threaded holes are provided with two and are symmetrically arranged about the axis of the sleeve.

[0008] Furthermore, the handles are provided with three and are distributed in a ring shape about the sleeve.

[0009] Furthermore, a fixing threaded hole corresponding to the handle is provided on an outer wall of the sleeve at one end away from the positioning threaded hole, and a first external thread threadedly connected to the fixing threaded hole is provided at one end of the handle.

[0010] Furthermore, a side of the nut away from the positioning screw is a hexagonal structure.

[0011] Furthermore, a first positioning ring is provided on the inner wall of one end of the sleeve close to the positioning threaded hole, and a second positioning ring is provided on the inner wall of one end of the sleeve away from the positioning threaded hole.

[0012] Furthermore, the handle includes a first lever arm and a second lever arm, the first lever arm is provided with a accommodating cavity inside, one end of the first lever arm is connected to the sleeve, and the other end is provided with an opening connected to the accommodating cavity, the second lever arm is located in the accommodating cavity, one end of the second lever arm extends outward through the opening of the first lever arm and is provided with a handle.

[0013] Furthermore, an internal thread is provided on the inner wall of the accommodating cavity, and a second external thread threadably connected to the internal thread is provided on the outer wall of the second lever arm.

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

[0015] By setting a sleeve, the two ends of the sleeve are through structures. When using the sleeve, first loosen the screws fixing the top sleeve on the pump shaft. After removing the screws, pass the pump shaft through the inside of the sleeve to move the sleeve to the position of the top sleeve, and align the positioning threaded hole of the sleeve with the screw hole of the top sleeve. Then, screw the positioning screw into the positioning threaded hole, tighten the nut of the screw with a wrench, so that the screw can connect the positioning threaded hole of the sleeve and the screw hole of the top sleeve. Finally, rotate the sleeve by the handle, and the sleeve drives the top sleeve to rotate, thereby loosening the top sleeve and screwing it out from the pump shaft, which greatly saves the disassembly time. It is not only efficient but also will not damage the top sleeve, and it also eliminates the safety risks of flammable and explosive substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 It is a schematic diagram of the working structure of the utility model.

[0020] The names of the components marked in the figure are as follows:

[0021] 1. Sleeve; 2. Positioning threaded hole; 3. Handle; 4. Positioning screw; 5. Nut; 6. Fixed threaded hole; 7. First external thread; 8. First positioning ring; 9. Second positioning ring; 10. First lever arm; 11. Second lever arm; 12. Handle; 13. Internal thread; 14. Second external thread; 15. Pump shaft; 16. Top sleeve; 17. Impeller; 18. Casing. DETAILED DESCRIPTION

[0022] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0023] like Figure 1-3 As shown, a disassembly tool for an impeller top sleeve comprises a sleeve 1, both ends of the sleeve 1 are through structures, so that the sleeve 1 can pass through a pump shaft 15; two positioning threaded holes 2 are arranged symmetrically about the axis of the sleeve 1 on the outer wall of one end of the sleeve 1, and the existing top sleeve 16 has two screw holes arranged symmetrically about the axis of the top sleeve 16, and the positioning threaded holes 2 are arranged in a manner that facilitates alignment with the screw holes of the top sleeve 16; three handles 3 are connected to the outer wall of the other end of the sleeve 1 and are distributed in an annular manner about the sleeve 1, The positioning threaded hole 2 is internally threadedly connected with a positioning screw 4, and a nut 5 is provided at one end of the positioning screw 4 away from the inside of the sleeve 1. The side of the nut 5 away from the positioning screw 4 is a hexagonal structure, and the nut 5 is tightened by a hexagonal wrench so that the screw 4 can connect the positioning threaded hole 2 of the sleeve and the screw hole of the top sleeve 16; a first positioning ring 8 is provided on the inner wall of the sleeve 1 at one end close to the positioning threaded hole 2, and a second positioning ring 9 is provided on the inner wall of the sleeve 1 at one end away from the positioning threaded hole 2, so as to facilitate the positioning of the sleeve 1 on the pump shaft 15;

[0024] A fixing threaded hole 6 corresponding to the handle 3 is provided on the outer wall of the sleeve 1 away from the positioning threaded hole 2, and the handle 3 includes a first lever arm 10 and a second lever arm 11. The first lever arm 10 has an accommodating cavity inside, and one end of the first lever arm 10 is provided with a first external thread 7 threadedly connected to the fixing threaded hole 6, so as to facilitate the disassembly of the handle 3; the other end of the first lever arm 10 is provided with an opening connected to the accommodating cavity, and the second lever arm 11 is located in the accommodating cavity, and one end of the second lever arm 11 extends outward through the opening of the first lever arm 10 and is provided with a handle 12, and an internal thread 13 is provided on the inner wall of the accommodating cavity, and a second external thread 14 threadedly connected to the internal thread 13 is provided on the outer wall of the second lever arm 11, and the second lever arm 11 can be extended to the outside of the accommodating cavity by rotating the second lever arm 11, thereby making the handle 3 longer, and it can be more labor-saving when holding the handle 12 for rotation.

[0025] Working principle:

[0026] like Figure 1-3 As shown, when it is necessary to pull the impeller 17 out of the casing 18, first loosen the screws that fix the top sleeve 16 on the pump shaft 15. After removing the screws, pass the pump shaft 15 through the inside of the sleeve 1, so that the sleeve 1 moves to the position of the top sleeve 16, and align the positioning threaded hole 2 of the sleeve 1 with the screw hole of the top sleeve 16. Then, screw the positioning screw 4 into the positioning threaded hole 2, and tighten the nut 5 with the hexagonal wrench so that the screw 4 can connect the positioning threaded hole 4 and the screw hole of the top sleeve 16, so that the sleeve 1 is fixedly connected to the top sleeve 16. Finally, rotate the sleeve 1 through the handle 3, and the sleeve 1 drives the top sleeve 16 to rotate, thereby loosening the top sleeve 16 and screwing it out of the pump shaft 15. In the process of rotating the handle 3, the second lever arm 11 can be rotated as needed, so that the second lever arm 11 can extend out of the accommodating cavity, thereby making the handle 3 longer, which can save more effort when holding the grip 12 for rotation.

[0027] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A disassembly tool for an impeller top sleeve, characterized in that: The sleeve (1) comprises a sleeve (1), wherein both ends of the sleeve (1) are through structures, a plurality of positioning threaded holes (2) surrounding the sleeve (1) are arranged on the outer wall of one end of the sleeve (1), a plurality of handles (3) surrounding the sleeve (1) are connected to the outer wall of the other end, a positioning screw (4) is connected to the inner thread of the positioning threaded hole (2), and a nut (5) is arranged at the end of the positioning screw (4) away from the interior of the sleeve (1).

2. The disassembly tool for the impeller top sleeve according to claim 1, characterized in that: Two positioning threaded holes (2) are provided and are symmetrically arranged about the axis of the sleeve (1).

3. The disassembly tool for the impeller top sleeve according to claim 1 is characterized in that: There are three handles (3) which are distributed in a ring shape about the sleeve (1).

4. The disassembly tool for the impeller top sleeve according to claim 1, characterized in that: A fixing threaded hole (6) corresponding to the handle (3) is provided on the outer wall of the sleeve (1) at one end away from the positioning threaded hole (2), and a first external thread (7) threadedly connected to the fixing threaded hole (6) is provided at one end of the handle (3).

5. The disassembly tool for the impeller top sleeve according to claim 1, characterized in that: The side of the nut (5) away from the positioning screw (4) is a hexagonal structure.

6. The disassembly tool for the impeller top sleeve according to claim 1, characterized in that: A first positioning ring (8) is provided on the inner wall of one end of the sleeve (1) close to the positioning threaded hole (2), and a second positioning ring (9) is provided on the inner wall of one end of the sleeve (1) away from the positioning threaded hole (2).

7. The disassembly tool for the impeller top sleeve according to claim 1, characterized in that: The handle (3) comprises a first lever (10) and a second lever (11); a receiving chamber is provided inside the first lever (10); one end of the first lever (10) is connected to the sleeve (1); the other end is provided with an opening communicating with the receiving chamber; the second lever (11) is located in the receiving chamber; one end of the second lever (11) passes through the opening of the first lever (10) and extends outwards and is provided with a grip (12).

8. The disassembly tool for the impeller top sleeve according to claim 7, characterized in that: An internal thread (13) is provided on the inner wall of the accommodating cavity, and a second external thread (14) threadably connected to the internal thread (13) is provided on the outer wall of the second lever arm (11).

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