Centrifugal pump impeller removal tool

Abstract

The utility model belongs to the technical field of pump body assembly, and specifically discloses a centrifugal pump impeller disassembly tool, including a screw, a screw nut connected to the screw external thread, a rotating seat coaxially connected to the lower end of the screw, and a pressure rod for abutting the shaft body coaxially connected to the lower end of the rotating seat. The pressure rod can be moved downward by rotating the screw, so as to stably abut the shaft body. A first guide groove is provided on the guide seat, and a plug rod for abutting the shaft key is slidably connected in the first guide groove, and the upper end of the plug rod is connected to the rotating seat. The plug rod can be accurately aligned with the shaft key, and the plug rod can be inserted or pulled out by rotating the screw, thereby facilitating the disassembly of the shaft key. A plurality of claws for buckling on the lower side of the impeller are connected to the outer peripheral side of the guide seat, and these claws can stably support the impeller on the bottom side to prevent the impeller from shaking or displacing during the disassembly process, thereby improving the fluency and stability of the impeller disassembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of pump body assembly, in particular to a centrifugal pump impeller disassembly tool. Background Art

[0002] The impeller of a centrifugal pump is usually connected to the shaft through a keyway or a matching nut; as one of the core components of the pump, the impeller may be affected by corrosion and wear after long-term operation, which will cause the impeller surface to become rough, increase the friction between the shaft or other components, and make disassembly difficult. The fit clearance between the impeller and the shaft is designed to be small to ensure that the impeller can work stably when rotating. However, this tight fit also requires overcoming greater friction during disassembly, increasing the difficulty of disassembly. If the locating pin between the impeller and the shaft is displaced, the relative position between the impeller and the shaft will change, increasing the difficulty of disassembly. The locking nut or connecting bolt on the impeller may rust due to long-term exposure to humid or corrosive environments, making it difficult to loosen during disassembly.

[0003] During the disassembly process, manual operation can easily cause the impeller to be damaged or stuck, further increasing the difficulty of disassembly. Utility Model Content

[0004] Aiming at the problem that the impeller of a centrifugal pump in the prior art is easily stuck or damaged when it is disassembled, a centrifugal pump impeller disassembly tool is proposed. The utility model provides the following technical solutions:

[0005] A centrifugal pump impeller disassembly tool comprises a screw rod, a screw nut is connected to the external thread of the screw rod, the lower end of the screw rod is coaxially rotatably connected to a rotating seat, a pressure rod for abutting a shaft body is coaxially rotatably connected under the rotating seat, the lower end of the screw nut is fixedly connected to a guide seat through a connecting rod, a first guide groove is provided on the guide seat, a plug rod for abutting a shaft key is slidably connected in the first guide groove, and the upper end of the plug rod is connected to the rotating seat; a plurality of claws for buckling on the lower side of the impeller are connected to the outer peripheral side of the guide seat.

[0006] Preferably, the pressure rod comprises a guide portion and a pressing portion from top to bottom in sequence, the guide portion has a diameter larger than that of the pressing portion, and the guide portion is provided with a second guide groove for slidingly connecting the plug rod.

[0007] Preferably, the second guide groove is arranged on the radial outside of the pressing portion.

[0008] Preferably, the first guide groove is a wedge-shaped groove, the insertion rod is a wedge-shaped rod, and the upper opening of the first guide groove is larger than the lower opening.

[0009] Preferably, the rotating seat comprises a base and a rotating drum, the rotating drum is rotatably connected to the base and fixedly connected to the screw rod, and the base is fixedly connected to the pressure rod.

[0010] Preferably, a first screw hole is provided on the outer wall of the base, the upper end of the insertion rod abuts against the base, and a connecting plate is fixedly connected to the outer side of the base, the connecting plate and the base are clearance-matched, a second screw hole is provided on the connecting plate, the first screw hole and the second screw hole are coaxially arranged, and an adjusting bolt is operably connected thereto.

[0011] Preferably, the clamping claw includes a radial adjustment rod, a vertical rod and a support plate for abutting the impeller, the radial adjustment rod is extended horizontally, the upper end of the vertical rod is connected to the radial adjustment rod, and the lower end is connected to the support plate, and the support plate is extended to the side close to the screw rod.

[0012] Preferably, the radial adjustment rod is provided with an elongated hole, the vertical rod is laterally slidably connected to the elongated hole, the upper end of the vertical rod is fixedly connected to a limiting block, and the limiting block is slidably connected to the upper surface of the radial adjustment rod.

[0013] Preferably, a crank handle is fixedly connected to the screw rod.

[0014] Preferably, it also includes a frame, on which a screw motor is mounted, and the screw motor is coaxially driven and connected to the lead screw.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model utilizes the threaded connection between the lead screw and the first lead screw nut, and the pressure rod can be abutted and pressed down on the shaft body by rotating the lead screw. At the same time, the insertion rod slides in the first guide groove of the guide seat, and can accurately abut on the shaft key to achieve rapid disengagement of the shaft key. In addition, the setting of multiple claws can evenly abut on the lower side of the impeller to prevent the impeller from shaking or rotating during the disassembly process, ensure the smooth disassembly, and improve the fluency and stability of the impeller disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 4 It is another three-dimensional structural schematic diagram of the utility model;

[0021] In the accompanying drawings, 1, screw rod; 2, screw nut; 3, rotating seat; 31, base; 32, rotating drum; 4, connecting rod; 5, guide seat; 51, first guide groove; 52, third guide groove; 6, pressure rod; 61, guide part; 611, second guide groove; 612, guide block; 62, pressing part; 7, insertion rod; 71, connecting plate; 8, claw; 81, radial adjustment rod; 811, long hole; 82, vertical rod; 83, support plate; 9, limit block. DETAILED DESCRIPTION

[0022] The directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention of the utility model.

[0023] Example 1

[0024] like Figure 1-4 As shown, a centrifugal pump impeller disassembly tool comprises a screw 1, a screw nut 2 is externally threadedly connected to the screw 1, a rotating seat 3 is coaxially rotatably connected to the lower end of the screw 1, and a pressure rod 6 for abutting the shaft body is coaxially rotatably connected to the lower end of the rotating seat 3. The operator can be allowed to rotate the screw 1 to move the pressure rod 6 downward, so as to stably abut the shaft body. The lower end of the screw nut 2 is fixedly connected to a guide seat 5 through a connecting rod 4; four connecting rods 4 are arranged at equal intervals around the axis of the screw; a first guide groove 51 is arranged on the guide seat 5, and a plug rod 7 for abutting the shaft key is slidably connected in the first guide groove 51, and the upper end of the plug rod 7 is connected to the rotating seat 3. The plug rod 7 can be accurately aligned with the shaft key, and the plug rod 7 can be inserted or pulled out by rotating the screw 1, thereby facilitating the disassembly of the shaft key. The outer peripheral side of the guide seat 5 is connected with a plurality of claws 8 for buckling against the lower side of the impeller. These claws 8 can stably support the impeller at the bottom side to prevent the impeller from shaking or shifting during the disassembly process, thereby improving the smoothness and stability of the impeller disassembly.

[0025] Preferably, the pressure rod 6 includes a guide portion 61 and a pressing portion 62 from top to bottom, the diameter of the guide portion 61 is larger than that of the pressing portion 62, and a second guide groove 611 for sliding the plug rod 7 is provided on the guide portion 61. Such a design makes the plug rod 7 more stable during the sliding process, and also ensures that the pressure rod 6 is stably abutted against the shaft body.

[0026] The first guide groove 51 is designed as a wedge-shaped groove, the insertion rod 7 is a wedge-shaped rod, and the upper opening of the first guide groove 51 is larger than the lower opening. Such a design enables the insertion rod 7 to gradually adapt to the shape of the shaft key when inserted into the shaft key, thereby making it easier to insert into the shaft key and improving the convenience of disassembly.

[0027] The rotating seat 3 includes a base 31 and a rotating drum 32, the rotating drum 32 is rotatably connected to the base 31 and fixedly connected to the screw rod 1, and the pressure rod 6 is fixedly connected to the base 31. The rotating seat 3 can rotate stably, and the pressure rod 6 can move up and down through the rotation of the screw rod 1.

[0028] A first screw hole is provided on the outer wall of the base 31, the upper end of the insertion rod 7 abuts against the base 31, and a connecting plate 71 is fixedly connected to the outer side of the base 31, the connecting plate 71 and the base 31 are arranged with clearance, a second screw hole is provided on the connecting plate 71, the first screw hole and the second screw hole are arranged coaxially, and an adjusting bolt is operably connected. By rotating the adjusting bolt, the clearance between the insertion rod 7 and the base 31 can be adjusted, so as to adapt to shaft keys of different sizes, thereby improving the versatility of the tooling.

[0029] Furthermore, a guide block 612 is fixedly connected to the outer side of the guide portion 61 , a third guide groove 52 is provided on the inner side of the guide seat 5 , and the guide block 612 is slidably connected to the third guide groove 52 up and down, which can improve the movement stability of the pressure rod 6 .

[0030] The claw 8 includes a radial adjustment rod 81, a vertical rod 82 and a support plate 83 for abutting against the impeller. The radial adjustment rod 81 is horizontally extended, the upper end of the vertical rod 82 is connected to the radial adjustment rod 81, and the lower end is connected to the support plate 83. The support plate 83 is extended to the side close to the screw rod 1. The claw 8 can stably support the impeller, and through the adjustment of the radial adjustment rod 81, it can adapt to impellers of different sizes, thereby improving the applicability of the tooling.

[0031] The radial adjustment rod 81 is provided with an elongated hole 811, the vertical rod 82 is slidably connected to the elongated hole 811, the upper end of the vertical rod 82 is fixedly connected to the limit block 9, and the limit block 9 is slidably connected to the upper surface of the radial adjustment rod 81. The claw 8 can be flexibly adjusted when supporting the impeller to ensure the stability of the impeller.

[0032] For the convenience of operation, a crank handle is fixedly connected to the screw rod 1, so that the operator can easily rotate the screw rod 1 to disassemble the impeller.

[0033] Example 2

[0034] In order to further improve the degree of automation of disassembly, the tooling also includes a frame, on which a lead screw motor is mounted, and the lead screw motor is coaxially driven and connected to the lead screw 1. Through the drive of the lead screw motor, the lead screw 1 can be automatically rotated, thereby realizing the automatic disassembly of the impeller, greatly improving the efficiency and convenience of disassembly, and reducing the difficulty and labor intensity of manual operation.

Claims

1. A centrifugal pump impeller disassembly tool, characterized in that: The invention comprises a screw rod (1), wherein the screw rod (1) is externally threadedly connected to a screw nut (2), the lower end of the screw rod (1) is coaxially rotatably connected to a rotating seat (3), a pressure rod (6) for abutting a shaft body is coaxially rotatably connected to the lower end of the rotating seat (3), the lower end of the screw nut (2) is fixedly connected to a guide seat (5) via a connecting rod (4), a first guide groove (51) is provided on the guide seat (5), a plug rod (7) for abutting a shaft key is slidably connected in the first guide groove (51), and the upper end of the plug rod (7) is connected to the rotating seat (3); a plurality of claws (8) for abutting against the lower side of an impeller are connected to the outer peripheral side of the guide seat (5).

2. The centrifugal pump impeller disassembly tool according to claim 1, characterized in that: The pressure rod (6) comprises, from top to bottom, a guide portion (61) and a downward pressure portion (62), the guide portion (61) having a diameter larger than that of the downward pressure portion (62), and a second guide groove (611) for slidingly connecting the plug rod (7) is provided on the guide portion (61).

3. The centrifugal pump impeller disassembly tool according to claim 2, characterized in that: The second guide groove (611) is arranged radially outside the pressing portion (62).

4. The centrifugal pump impeller disassembly tool according to claim 1, characterized in that: The first guide groove (51) is a wedge-shaped groove, the insertion rod (7) is a wedge-shaped rod, and the upper opening of the first guide groove (51) is larger than the lower opening.

5. The centrifugal pump impeller disassembly tool according to claim 1, characterized in that: The rotating seat (3) comprises a base (31) and a rotating drum (32); the rotating drum (32) is rotatably connected to the base (31) and fixedly connected to the screw rod (1); and the base (31) is fixedly connected to the pressure rod (6).

6. The centrifugal pump impeller disassembly tool according to claim 5, characterized in that: A first screw hole is provided on the outer wall of the base (31), the upper end of the insertion rod (7) abuts against the base (31), and a connecting plate (71) is fixedly connected to the outer side of the base (31), the connecting plate (71) and the base (31) are arranged with clearance, and a second screw hole is provided on the connecting plate (71), the first screw hole and the second screw hole are arranged coaxially, and an adjusting bolt is operably connected thereto.

7. The centrifugal pump impeller disassembly tool according to claim 1, characterized in that: The clamping claw (8) comprises a radial adjustment rod (81), a vertical rod (82) and a support plate (83) for abutting against the impeller. The radial adjustment rod (81) is horizontally extended. The vertical rod (82) is connected to the radial adjustment rod (81) at its upper end and to the support plate (83) at its lower end. The support plate (83) is extended toward a side close to the screw rod (1).

8. The centrifugal pump impeller disassembly tool according to claim 7, characterized in that: The radial adjustment rod (81) is provided with an elongated hole (811), the vertical rod (82) is laterally slidably connected to the elongated hole (811), the upper end of the vertical rod (82) is fixedly connected to a limiting block (9), and the limiting block (9) is slidably connected to the upper surface of the radial adjustment rod (81).

9. The centrifugal pump impeller disassembly tool according to claim 1, characterized in that: A crank handle is fixedly connected to the screw rod (1).

10. The centrifugal pump impeller disassembly tool according to claim 1, characterized in that: It also comprises a frame, on which a lead screw motor is mounted, and the lead screw motor is coaxially driven and connected to the lead screw (1).

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