Disassembling tool special for multi-section centrifugal pump

Abstract

The utility model relates to a disassembling tool special for a multi-section centrifugal pump, and belongs to the technical field of water pump maintenance equipment in the metallurgical industry. According to the technical scheme, one end of a left pulling arm (1) and one end of a right pulling arm (2) are each provided with a pulling buckle (1-1) matched with a centrifugal pump (6), the other end of the left pulling arm (1) and the other end of the right pulling arm (2) are connected together through a pressing plate (3), and the distance between the left pulling arm (1) and the right pulling arm (2) is matched with the diameter of a pump body of the multi-section centrifugal pump (6); the pressing lead screw (4) is arranged between the left pull arm (1) and the right pull arm (2), the pressing lead screw (4) is in threaded connection with the pressing plate (3), one end of the pressing lead screw (4) is matched with a pump shaft (8) of the multi-section centrifugal pump (6), and the whole pressing lead screw (4) is symmetrically arranged on the two sides with the pressing lead screw (4) as the center. The multi-section centrifugal pump has the advantages that the maintenance efficiency of the multi-section centrifugal pump is improved, the labor intensity of maintenance personnel is reduced, and damage to pump parts in the maintenance process is reduced.

Description

Technical Field

[0001] This utility model relates to a special disassembly tool for multi-stage centrifugal pumps, belonging to the technical field of water pump maintenance equipment in the metallurgical industry. Background Technology

[0002] A multi-stage centrifugal pump consists of a front section, a rear section, and several intermediate sections, connected as a whole by four long bolts. The working principle of a multi-stage centrifugal pump is that the impeller drives the liquid to rotate at high speed, causing the liquid to gain energy through centrifugal force. Liquid in the suction chamber at the front of the first-stage impeller enters the first-stage impeller, where it performs work and is then thrown into the first-stage guide wheel. After being recharged by the first-stage guide wheel, it enters the second-stage impeller, and so on, until it is thrown out from the rear impeller. After being collected by the volute casing, it is discharged to the outlet.

[0003] After prolonged use, components such as the impeller and guide vanes inside a multi-stage centrifugal pump will wear down. Severe wear can prevent proper drainage, necessitating disassembly and overhaul. A common disassembly method involves hammering the pump casing with a hammer to separate the sections. However, due to the frequent corrosion of the impeller and shaft sleeve with the pump shaft after long-term use, disassembly is extremely difficult and prone to damaging intact internal components. This method is inefficient, labor-intensive, and costly to maintain. Utility Model Content

[0004] The purpose of this utility model is to provide a special disassembly tool for multi-stage centrifugal pumps, which improves the maintenance efficiency of multi-stage centrifugal pumps, reduces the labor intensity of maintenance personnel, reduces damage to pump components during maintenance, and solves the problems existing in the background art.

[0005] The technical solution of this utility model is:

[0006] A special disassembly tool for a multi-stage centrifugal pump includes a left pull arm, a right pull arm, a pressure plate, and a clamping screw. One end of the left and right pull arms is provided with a pull buckle that cooperates with the centrifugal pump. The other ends of the left and right pull arms are connected together by the pressure plate. The distance between the left and right pull arms matches the pump body diameter of the multi-stage centrifugal pump. The clamping screw is located between the left and right pull arms and is threaded onto the pressure plate. One end of the clamping screw cooperates with the pump shaft of the multi-stage centrifugal pump. The entire tool is symmetrically arranged on both sides with the clamping screw as the center.

[0007] The left pull arm and the pressure plate, as well as the right pull arm and the pressure plate, are connected together by fixing pins.

[0008] The left and right pull arms are each provided with several pressure plate fixing holes that match the fixing pins along their length.

[0009] The pressing plate is provided with a strip-shaped hole for cooperation with the left and right pull arms at both ends, and a center hole for cooperation with the pressing screw in the middle.

[0010] The pull-off buckles of the left and right pull arms are annular at one end for cooperation with the centrifugal pump.

[0011] The pressing screw is provided with a screw cone at one end for cooperation with the pump shaft of the multi-section centrifugal pump, and a screw handle at the other end.

[0012] When the multi-section centrifugal pump is disassembled, the pull-off buckles of the left and right pull arms are connected with the knocking iron of the centrifugal pump, the pressing screw is used to press the water pump shaft, the pressing screw is twisted until the middle section of the centrifugal pump is disassembled, the step is repeated, and finally the multi-section centrifugal pump is completely disassembled.

[0013] The utility model has the advantages of simple structure, convenient carrying and use, improved disassembly efficiency of the multi-section centrifugal pump, small damage rate of the pump body, reduced labor intensity of workers, and ensured maintenance effectiveness. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a structural schematic diagram of the utility model;

[0015] Fig. 2 It is a schematic diagram of the utility model before use;

[0016] Fig. 3 It is a schematic diagram of the utility model after use;

[0017] In the drawing: left pull arm 1, right pull arm 2, pressing plate 3, pressing screw 4, fixed pin 5, multi-section centrifugal pump 6, knocking iron 7, pump shaft 8;

[0018] Pull-off buckle 1-1, pressing plate fixing hole 1-2;

[0019] Center hole 3-1, pull arm strip-shaped hole 3-2;

[0020] Screw cone 4-1, screw handle 4-2; DETAILED DESCRIPTION

[0021] The utility model will be further described through examples in combination with the drawings.

[0022] Refer to the attached Figs. 1-3A special disassembly tool for a multi-stage centrifugal pump includes a left pull arm 1, a right pull arm 2, a pressure plate 3, and a clamping screw 4. One end of the left pull arm 1 and the right pull arm 2 are respectively provided with a pull buckle 1-1 that cooperates with the centrifugal pump 6. The other ends of the left pull arm 1 and the right pull arm 2 are connected together by the pressure plate 3. The distance between the left pull arm 1 and the right pull arm 2 matches the pump body diameter of the multi-stage centrifugal pump 6. The clamping screw 4 is located between the left pull arm 1 and the right pull arm 2. The clamping screw 4 is threaded onto the pressure plate 3. One end of the clamping screw 4 cooperates with the pump shaft 8 of the multi-stage centrifugal pump 6. The entire assembly is symmetrically arranged on both sides with the clamping screw 4 as the center.

[0023] In this embodiment, refer to the appendix Figs. 1-3 The front ends of the left pull arm 1 and the right pull arm 2 are provided with pull buckles 1-1 that connect to the striking iron 7 of the multi-stage centrifugal pump 6. The arms of the left pull arm 1 and the right pull arm 2 are provided with multiple pressure plate fixing holes 1-2. The pressure plate fixing holes 1-2 are matched with the size of the fixing pin 5. The pressure plate 3 is provided with a pull arm strip hole 3-2 through which the left pull arm 1 and the right pull arm 2 can pass. The middle part of the pressure plate 3 is provided with a center hole 3-1 that matches the thread of the clamping screw 4. The front end of the clamping screw 4 is a screw taper 4-1, the middle part is threaded, and the rear end is a screw shank 4-2.

[0024] Fig. 1 , 2 As shown in Figure 3, the pull buckle 1-1 is a U-shaped steel piece with an inner hole slightly larger than the striking iron 7. When in use, the pull buckle 1-1 is inserted into the striking iron 7.

[0025] The left pull arm 1 and the right pull arm 2 are the same size and specifications. The left pull arm 1 and the right pull arm 2 are inserted into the pull arm strip holes 3-2 at the left and right ends of the pressure plate 3. The distance between the pull arm strip holes 3-2 at the left and right ends is equal to the outer diameter of the multi-stage centrifugal pump 6. The fixing pin 5 is inserted into the fixing hole 1-2 of the pressure plate.

[0026] Fig. 2 , 3 The diagram shows that when disassembling the centrifugal water pump, first insert the rear ends of the left pull arm head 1 and the right pull arm 2 into the pull arm strip hole 3-2 of the pressure plate 3, and connect the left pull arm 1 and the right pull arm 2 to the pressure plate 3 through the fixing pin 5. Then connect the front pull buckle 1-1 of the left pull arm 1 and the right pull arm 2 to the striking iron 7 of the centrifugal pump 6. Finally, gradually screw the clamping screw 4 into the center hole 3-1 of the pressure plate 3 until the water pump shaft 8 is clamped. Continue to screw the clamping screw 4 until the middle section of the centrifugal pump is disassembled. Repeat this step until the multi-section centrifugal pump is completely disassembled.

[0027] An embodiment of this utility model is as follows:

[0028] The left pull arm 1 is 2000mm long, 120mm wide, and 10mm thick;

[0029] Pull-out buckle 1-1 has an outer side length of 160mm, an inner side length of 120mm, and a thickness of 10mm.

[0030] The inner diameter of the pressure plate fixing holes 1-2 is 22mm.

[0031] The left pull arm 1 is provided with 7 pressure plate fixing holes 1-2, with a distance of 200mm between the holes;

[0032] The length of pressure plate 3 is 1000mm, the width is 200mm, and the thickness is 10mm;

[0033] The center hole 3-1 has an inner diameter of 20mm and a pitch of 2.5mm.

[0034] The pull arm strip hole 3-2 is 125mm high, 12mm wide, and 10mm deep. There are four pull arm strip holes 3-2 on the pressure plate 3. The distance between the pull arm strip holes at both ends is 700mm. The remaining two can be set according to the requirements.

[0035] The clamping screw 4 has a length of 1500mm, a thread length of 1200mm, a thread large diameter of 18.38mm, an external thread minor diameter of 17.3mm, and a pitch of 2.5mm.

[0036] The lead screw tap 4-1 has a bottom circle diameter of 20mm and a height of 10mm.

[0037] The lead screw shank 4-2 has a length of 30mm, a width of 20mm, and a height of 20mm.

[0038] The fixing pin 5 has a length of 40mm and an inner diameter of 20mm.

Claims

1. A special disassembly tool for a multi-stage centrifugal pump, characterized in that: It includes a left pull arm (1), a right pull arm (2), a pressure plate (3) and a clamping screw (4). One end of the left pull arm (1) and the right pull arm (2) are respectively provided with a pull buckle (1-1) that cooperates with the centrifugal pump (6). The other end of the left pull arm (1) and the right pull arm (2) are connected together by the pressure plate (3). The distance between the left pull arm (1) and the right pull arm (2) matches the pump body diameter of the multi-stage centrifugal pump (6). The clamping screw (4) is set between the left pull arm (1) and the right pull arm (2). The clamping screw (4) is threaded on the pressure plate (3). One end of the clamping screw (4) cooperates with the pump shaft (8) of the multi-stage centrifugal pump (6). The whole is symmetrically arranged on both sides with the clamping screw (4) as the center.

2. The disassembly tool for a multi-stage centrifugal pump according to claim 1, characterized in that: The left pull arm (1) and the pressure plate (3) and the right pull arm (2) and the pressure plate (3) are respectively connected together by fixing pins (5).

3. The disassembly tool for a multi-stage centrifugal pump according to claim 2, characterized in that: The left pull arm (1) and the right pull arm (2) are respectively provided with a number of pressure plate fixing holes (1-2) that match the fixing pin (5) along the length direction.

4. The disassembly tool for a multi-stage centrifugal pump according to claim 3, characterized in that: The pressure plate (3) has pull arm strip holes (3-2) at both ends that cooperate with the left pull arm (1) and the right pull arm (2), and a center hole (3-1) in the middle of the pressure plate (3) that cooperates with the clamping screw (4).

5. The disassembly tool for a multi-stage centrifugal pump according to claim 1, characterized in that: The pull buckle (1-1) at one end of the left pull arm (1) and the right pull arm (2) that cooperates with the centrifugal pump (6) is ring-shaped.

6. The disassembly tool for a multi-stage centrifugal pump according to claim 1, characterized in that: The end of the clamping screw (4) that is engaged with the pump shaft (8) of the multi-stage centrifugal pump (6) is a screw taper (4-1), and the other end of the clamping screw (4) is a screw handle (4-2).

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