Desulfurization slurry circulating pump impeller dismounting device

Abstract

The utility model provides a desulfurization slurry circulating pump impeller dismounting device, which relates to the field of circulating pump maintenance and comprises a top plate, a through hole is formed in the middle of the top plate, a threaded pull rod in threaded connection with an impeller is rotatably connected in the through hole, and a fixing nut is fixedly mounted at the end, away from a thread, of the threaded pull rod. An ejection mechanism is arranged between the ejection plate and the main shaft, a limiting mechanism for limiting the position of the ejection mechanism is arranged on the outer surface of the ejection mechanism, and the limiting mechanism is fixedly connected with the ejection plate. According to the impeller dismounting device for the desulfurization slurry circulating pump, the threaded pull rod is in threaded connection with the impeller, the hydraulic jack is arranged between the top plate and the main shaft, the position of the hydraulic jack is limited to be concentric with the main shaft through the symmetrical limiting semi-rings, and the hydraulic jack works to extrude the main shaft and the impeller to be separated; and by arranging the limiting semi-rings, the situation that the threaded pull rod is stressed unevenly due to inclination when the hydraulic jack is unfolded can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating pump maintenance, in particular to an impeller removal device for a desulfurization slurry circulating pump. Background Technique

[0002] In the desulfurization system of thermal power plants, the slurry circulating pump is one of the important equipment. However, due to the complex working conditions and the strong abrasion and corrosion of the working medium, the impeller needs to be regularly maintained or replaced.

[0003] The original tools are relatively bulky. Limited by the shape and material of the impeller, it is not convenient to use a sledgehammer to strike, and it is easy to cause damage to the impeller, which is time-consuming and laborious and affects work efficiency. When slurry enters between the impeller and the main shaft, it will cause the tightening force between the impeller and the main shaft to increase. The existing solution is to use a hydraulic jack that can squeeze the impeller and the main shaft in cooperation with a threaded tie rod threadedly connected to the impeller to form a puller, and separate the impeller and the main shaft by extrusion.

[0004] However, in such a setting, the hydraulic jack is suspended. During the operation process, the position of the hydraulic jack needs to be manually adjusted. When the hydraulic jack is tilted and unfolded, the threaded tie rod will be unevenly stressed, resulting in deformation of the threaded port of the impeller and affecting subsequent use. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides an impeller removal device for a desulfurization slurry circulating pump, which solves the problem that the threaded tie rod is unevenly stressed due to the uneven stress of the jacking mechanism and tilting jacking.

[0006] Technical Solution

[0007] To achieve the above purposes, the utility model is realized through the following technical solutions: an impeller removal device for a desulfurization slurry circulating pump, including a top plate. A through hole is provided in the middle of the top plate. A threaded tie rod threadedly connected to the impeller is rotatably connected inside the through hole. A fixing nut is fixedly installed at the end of the threaded tie rod away from the threaded end. A jacking mechanism is provided between the top plate and the main shaft. A limiting mechanism for restricting the position of the jacking mechanism is provided on the outer surface of the jacking mechanism. The limiting mechanism is fixedly connected to the top plate.

[0008] Further, the jacking mechanism is a hydraulic jack, and the limiting mechanism is a limiting semi-ring concentric with the hydraulic jack. The limiting semi-rings are symmetrically arranged, and the inner diameter of the limiting semi-ring is the same as the outer diameter of the hydraulic jack.

[0009] Further, the jacking mechanism is a threaded shaft, and the limiting mechanism is a threaded sleeve. The threaded sleeve is fixedly installed in the middle of the top plate, and the threaded shaft is threadedly connected inside the threaded sleeve and penetrates through the top plate.

[0010] Further, a limiting ring is fixedly installed at the tail end of the threaded shaft, and the reduction gearbox is fixedly connected to the top plate through a connecting rod, and the connecting rod is located between the limiting ring and the threaded pull rod.

[0011] Further, one end of the threaded pull rod behind the top plate is provided with a threaded groove, and a limiting nut is threadedly connected to the outer surface of the threaded groove.

[0012] Further, a limiting ring groove is formed at the edge of the top plate, a limiting ring shaft is slidably connected inside the limiting ring groove, a plugging groove communicating with the limiting ring groove is formed at the rear end of the top plate, an extension rod is fixedly installed on the outer surface of the limiting ring shaft, a telescopic sleeve perpendicular to the extension rod is fixedly installed at one end of the extension rod away from the limiting ring shaft, and a clamping rod parallel to the extension rod is fixedly installed at the free end of the telescopic sleeve, and the clamping rod is clamped with the pump body.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. For this desulfurization slurry circulation pump impeller removal device, by setting the threaded pull rod to be threadedly connected to the impeller, and arranging the hydraulic jack between the top plate and the main shaft, and restricting the position of the hydraulic jack to be concentric with the main shaft through symmetrical limiting half rings, the hydraulic jack can work to extrude the main shaft and the impeller for separation. By setting the limiting half rings, it can be avoided that the threaded pull rod is unevenly stressed due to tilting when the hydraulic jack expands.

[0015] 2. For this desulfurization slurry circulation pump impeller removal device, by setting a limiting ring groove at the edge of the top plate, a limiting ring shaft is slidably connected inside the limiting ring groove, a plugging groove communicating with the limiting ring groove is formed at the rear end of the top plate, an extension rod is fixedly installed on the outer surface of the limiting ring shaft, a telescopic sleeve perpendicular to the extension rod is fixedly installed at one end of the extension rod away from the limiting ring shaft, and a clamping rod parallel to the extension rod is fixedly installed at the free end of the telescopic sleeve, and the clamping rod is clamped with the pump body. Through such a setting, the top plate can be limited by the clamping rod and the extension rod to make the top plate concentric with the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a schematic connection diagram of the hydraulic jack of the present utility model;

[0018] Figure 3 is a schematic connection diagram of the top plate of the present utility model;

[0019] Figure 4 is a schematic connection diagram of the threaded shaft of the present utility model.

[0020] Among them, 1. top plate; 2. through hole; 3. threaded pull rod; 4. fixing nut; 5. ejection mechanism; 6. limiting mechanism; 7. threaded groove; 8. limiting nut; 9. limiting ring groove; 10. limiting ring shaft; 11. plug-in groove; 13. telescopic sleeve; 14. clamping rod; 12. extension rod; 511, hydraulic jack; 611, limiting half ring; 621, threaded sleeve; 521, threaded shaft; 522, square groove; 523, square shaft; 524, reduction box; 525, plug-in block; 526, limiting ring; 527, connecting rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1-4 A desulfurization slurry circulation pump impeller removal device comprises a top plate 1, a through hole 2 is opened in the middle of the top plate 1, a threaded tie rod 3 connected to the impeller thread is rotatably connected inside the through hole 2, the threaded tie rod 3 is preferably 8, and a fixing nut 4 is fixedly installed on the threaded end of the threaded tie rod 3 away from the threaded end, an ejection mechanism 5 is arranged between the top plate 1 and the main shaft, and a limiting mechanism 6 for limiting the position of the ejection mechanism 5 is arranged on the outer surface of the ejection mechanism 5, and the limiting mechanism 6 is fixedly connected to the top plate 1.

[0023] Specifically, the ejection mechanism 5 is a hydraulic jack 511, and the limiting mechanism 6 is a limiting semi-ring 611 whose diameter is concentric with the hydraulic jack 511. The limiting semi-ring 611 is symmetrically arranged, and the inner diameter of the limiting semi-ring 611 is the same as the outer diameter of the hydraulic jack 511. The hydraulic jack 511 can separate the impeller and the main shaft through its own expansion and contraction. By setting the limiting semi-ring 611, it can be ensured that the hydraulic jack 511 is concentric with the main shaft and moves horizontally.

[0024] Specifically, the threaded rod 3 is located at one end of the threaded groove 7 behind the top plate 1, and the outer surface of the threaded groove 7 is threadedly connected to a limiting nut 8. Through this arrangement, the threaded rod 3 can be fine-tuned so that the threaded rod 3 is evenly stressed.

[0025] Specifically, a limiting ring groove 9 is formed at the edge of the top plate 1. A limiting ring shaft 10 is slidably connected inside the limiting ring groove 9. A plugging groove 11 communicating with the limiting ring groove 9 is formed at the rear end of the top plate 1. An extension rod 12 is fixedly installed on the outer surface of the limiting ring shaft 10. One end of the extension rod 12 far from the limiting ring shaft 10 is fixedly installed with a telescopic sleeve 13 perpendicular to the extension rod 12. A clamping rod 14 parallel to the extension rod 12 is fixedly installed at the free end of the telescopic sleeve 13. The clamping rod 14 is clamped with the pump body. Through such a setting, the top plate 1 can be limited by the clamping rod 14 and the extension rod 12, so that the top plate 1 is concentric with the main shaft. At the same time, the plugging groove 11 can be set to take out the limiting ring shaft 10.

[0026] Based on the above structure, in one embodiment, the ejecting mechanism 5 is a threaded shaft 521, and the limiting mechanism 6 is a threaded sleeve 621. The threaded sleeve 621 is fixedly installed in the middle of the top plate 1. The threaded shaft 521 is threadedly connected inside the threaded sleeve 621 and penetrates through the top plate 1. A square groove 522 is formed at the tail end of the threaded shaft 521. A square shaft 523 is slidably connected inside the square groove 522. A reduction gearbox 524 is fixedly installed at the rear end of the top plate 1. The output end of the reduction gearbox 524 is fixedly connected to the square shaft 523. A plugging block 525 is fixedly installed at the input end of the reduction gearbox 524. Since the hydraulic jack 511 has a large mass, the threaded tie rod 3 will be bent under the action of gravity. Therefore, replacing the threaded shaft 521 with a smaller mass can avoid the bending of the threaded tie rod 3. By driving the square shaft 523 to rotate through the power source, the threaded shaft 521 can be driven to rotate, and then it can move relative to the threaded sleeve 621, so as to squeeze the impeller and the main shaft to separate.

[0027] Specifically, a limiting ring 526 is fixedly installed at the tail end of the threaded shaft 521. The reduction gearbox 524 and the top plate 1 are fixedly connected through a connecting rod 527. The connecting rod 527 is located between the limiting ring 526 and the threaded tie rod 3. Through such a setting, a fixing effect can be achieved.

[0028] During use, the threaded tie rod 3 is threadedly connected with the impeller, and the hydraulic jack 511 is arranged between the top plate 1 and the main shaft. The position of the hydraulic jack 511 is restricted to be concentric with the main shaft through the symmetric limiting half rings 611. When the hydraulic jack 511 works, it can squeeze the main shaft and the impeller to separate. By setting the limiting half rings 611, it can be avoided that the threaded tie rod 3 is unevenly stressed due to the inclination when the hydraulic jack 511 expands.

[0029] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0030] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, making equivalent substitutions or changes should be covered within the protection scope of the present utility model.

Claims

1. A desulfurization slurry circulation pump impeller removal device, comprising a top plate (1), characterized in that: A through hole (2) is provided in the middle of the top plate (1), a threaded tie rod (3) threadably connected to the impeller is rotatably connected inside the through hole (2), a fixing nut (4) is fixedly installed away from the threaded end of the threaded tie rod (3), an ejection mechanism (5) is provided between the top plate (1) and the main shaft, a limiting mechanism (6) for limiting the position of the ejection mechanism is provided on the outer surface of the ejection mechanism (5), and the limiting mechanism (6) is fixedly connected to the top plate (1).

2. The desulfurization slurry circulation pump impeller removal device according to claim 1, characterized in that: The ejection mechanism (5) is a hydraulic jack (511), and the limiting mechanism (6) is a limiting semi-ring (611) whose diameter is concentric with the hydraulic jack (511). The limiting semi-rings (611) are symmetrically arranged, and the inner diameter of the limiting semi-ring (611) is the same as the outer diameter of the hydraulic jack (511).

3. The impeller removal device for a desulfurization slurry circulation pump according to claim 1, characterized in that: The ejection mechanism (5) is a threaded shaft (521), the limiting mechanism (6) is a threaded sleeve (621), the threaded sleeve (621) is fixedly mounted in the middle of the top plate (1), and the threaded shaft (521) is threadedly connected to the inside of the threaded sleeve (621) and passes through the top plate (1).

4. A desulfurization slurry circulation pump impeller removal device according to claim 3, characterized in that: A limit ring (526) is fixedly mounted on the tail end of the threaded shaft (521), and the reduction box (524) and the top plate (1) are fixedly connected via a connecting rod (527), wherein the connecting rod (527) is located between the limit ring (526) and the threaded pull rod (3).

5. A desulfurization slurry circulation pump impeller removal device according to any one of claims 1 to 4, characterized in that: The threaded pull rod (3) is located at a thread groove (7) at one end behind the top plate (1), and the outer surface of the thread groove (7) is threadedly connected to a limit nut (8).

6. A desulfurization slurry circulation pump impeller removal device according to claim 5, characterized in that: The edge of the top plate (1) is provided with a limit ring groove (9), the interior of the limit ring groove (9) is slidably connected to the limit ring shaft (10), the rear end of the top plate (1) is provided with a plug-in groove (11) connected to the limit ring groove (9), an extension rod (12) is fixedly mounted on the outer surface of the limit ring shaft (10), a telescopic sleeve (13) perpendicular to the extension rod (12) is fixedly mounted on one end of the extension rod (12) away from the limit ring shaft (10), a clamping rod (14) parallel to the extension rod (12) is fixedly mounted on the free end of the telescopic sleeve (13), and the clamping rod (14) is clamped to the pump body.

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