A disassembly tool for a vertical long-axis multistage pump

Abstract

The present invention relates to the field of disassembly tools, specifically a disassembly tool for a vertical long-axis multistage pump, which includes: a disassembly support plate, which passes horizontally through the top end cover of the vertical long-axis multistage pump, a disassembly sleeve is vertically and rotatably arranged at the bottom of the disassembly support plate, and a rotating assembly for driving the disassembly sleeve to rotate is arranged on the disassembly support plate; a top shaft bolt disassembly assembly is arranged on the disassembly support plate, and a force-applying member of the top shaft bolt disassembly assembly is located on the outside of the top end cover of the vertical long-axis multistage pump; and a support mechanism is arranged on a workbench to provide a limit for the disassembly support plate, and the support mechanism can rotate 360 ​​degrees in a plane to ensure that the disassembly support plate can be rotated for disassembly work. The present invention can quickly loosen the top shaft bolt, can adapt to the disassembly work of mechanical seals on more models of vertical long-axis multistage pumps, has a wide range of use, and has high efficiency in mechanical seal disassembly.

Description

Technical Field

[0001] The invention relates to the field of disassembly tools, in particular to a disassembly tool for a vertical long-axis multi-stage pump. Background Art

[0002] Vertical long-axis multistage pump is a common industrial pump used to transport clean water or liquids with physical and chemical properties similar to clean water. Its disassembly is mainly for inspection, repair or replacement of damaged parts.

[0003] A Chinese patent with publication number CN115106985A discloses a convenient tool for disassembling a multi-stage pump. By disassembling the setting of the sleeve and the hexagonal notch set at the bottom of the sleeve, the mechanical seal can be easily and quickly replaced. The original replacement of the mechanical seal took 2 hours, but after the improvement, it only takes 1 hour, and it effectively ensures that the new mechanical seal will not be damaged during installation.

[0004] However, the above-mentioned disclosed scheme has the following shortcomings: before disassembling the mechanical seal, it is necessary to loosen the three top shaft bolts on the mechanical seal (radially passing through the mechanical seal and tightening the main shaft), the bolts are hexagon socket bolts, and since the mechanical seal of the vertical long-axis multistage pump is located in the top end cover, the space is small, and it is very troublesome to loosen the three top shaft bolts, especially after the bolts are rusted, it is more difficult to operate in a small space, and the disclosed technical scheme cannot easily loosen the three top shaft bolts. In addition, the sleeve needs to be put on the mechanical seal from above, and it must pass through the hole on the top end cover for the motor output shaft to pass through. This requires that the through hole of the motor output shaft is larger than the hexagonal structure on the mechanical seal. For many types of vertical multistage pumps, it cannot be achieved, which also results in the disclosed scheme being unable to pass through the motor output shaft through the through hole to disassemble the mechanical seal, and the scope of application is greatly limited. Summary of the invention

[0005] The purpose of the present invention is to propose a disassembly tool for a vertical long-axis multistage pump to address the problems in the background technology that it is inconvenient to loosen the top shaft bolt on the mechanical seal in a narrow space, and the method of passing through the motor output shaft through the hole from above has a small scope of application and is difficult to apply to various types of vertical multistage pumps.

[0006] The technical solution of the present invention is: a disassembly tool for a vertical long-axis multistage pump, comprising a workbench, on which the vertical long-axis multistage pump is vertically fixed; and further comprising:

[0007] The disassembly support plate is passed horizontally through the top end cover of the vertical long-axis multistage pump. The disassembly support plate bottom is vertically and rotatably provided with a disassembly sleeve. When the mechanical seal on the vertical long-axis multistage pump is disassembled, the disassembly sleeve is fitted on the hexagonal plate of the mechanical seal. The disassembly support plate is provided with a rotating assembly that drives the disassembly sleeve to rotate;

[0008] A top shaft bolt disassembly assembly is arranged on a disassembly support plate, and is used to loosen the top shaft bolt on the mechanical seal. A force-applying member of the top shaft bolt disassembly assembly is located outside the top end cover of the vertical long-axis multistage pump;

[0009] And a support mechanism is arranged on the workbench to provide a limit for disassembling the support plate. The support mechanism can rotate 360 ​​degrees in a plane to ensure that the disassembly support plate can be rotated for disassembly work.

[0010] Preferably, the supporting mechanism includes a rotating ring rotatably arranged on the workbench, two supporting rods vertically arranged on the rotating ring, a supporting block arranged on the top of the two supporting rods, and two clamping plates arranged on the supporting block; the two supporting rods are respectively located at the two ends of the diameter of the rotating ring, and the gap between the two clamping plates is for the disassembly support plate to pass through. A baffle is arranged at one end of the disassembly support plate, and when the mechanical seal is in a disassembled state, the baffle is in contact with the outer side of the support block.

[0011] Preferably, the rotating assembly includes a rotating shaft vertically arranged at the top center position of the disassembly sleeve, a gear arranged on the rotating shaft, and a rack slidably arranged on the disassembly support plate; the rotating shaft passes through the disassembly support plate, and the rack is meshed with the gear; in order to prevent the disassembly sleeve from rotating when the disassembly support plate is rotated, a rack limiting unit is arranged on the disassembly support plate.

[0012] Preferably, the rack limiting unit includes a bolt and a limiting rod, a threaded hole is arranged on the disassembly support plate, the bolt cooperates with the threaded hole, a limiting hole opposite to the threaded hole is arranged on the rack, and the limiting rod is arranged at the end of the bolt and cooperates to pass through the limiting hole.

[0013] Preferably, one end of the rack is located in the middle of the disassembly support plate, the other end extends outside the disassembly support plate, and a rack end plate is provided at the end away from the disassembly support plate.

[0014] Preferably, the top shaft bolt removal assembly includes a top shaft bolt removal rod inserted into the disassembly support plate, and a hexagonal removal head and a rotating disk arranged at both ends of the top shaft bolt removal rod, the hexagonal removal head is located outside the disassembly support plate, the rotating disk is located in an avoidance groove arranged on the disassembly support plate, and a plurality of through sockets are radially arranged on the rotating disk, one of which is adapted to pass through the insertion rod.

[0015] Preferably, when the top shaft bolts are removed, the rotating disk and the insertion rod are located outside the top end cover of the vertical long-axis multi-stage pump.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] The rotating disk and the insert rod are both located outside the narrow space of the top end cover, which makes the operation more convenient and labor-saving, and can quickly loosen the top shaft bolt. Especially when the top shaft bolt is rusted and requires a large rotation force, the insert rod can lengthen the torque, achieve the effect of labor saving, and smoothly loosen the top shaft bolt;

[0018] The disassembly sleeve does not need to pass through the through hole of the motor output shaft, but directly passes through the top end cover horizontally, and then the disassembly sleeve is put on the hexagonal plate. There is no need to consider the size of the through hole of the motor output shaft and the size of the hexagonal plate. It can adapt to the disassembly of mechanical seals on more models of vertical long-axis multi-stage pumps and has a wide range of uses.

[0019] By setting the rotating assembly, the mechanical seal can be quickly disassembled after the mechanical seal is loosened in the initial stage, avoiding the problem of repeated operations in a small space to unscrew the mechanical seal, thereby improving the disassembly efficiency of the mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the disassembly mechanism;

[0022] Figure 3 This is a schematic diagram of the removal of the top shaft bolt;

[0023] Figure 4 for Figure 3 A is an enlarged schematic diagram;

[0024] Figure 5 This is a schematic diagram of mechanical seal disassembly;

[0025] Figure 6 for Figure 5 Schematic diagram of part of the structure.

[0026] : 1. workbench; 2. vertical long-axis multi-stage pump; 3. fixing hole; 4. rotating ring; 5. support rod; 6. support block; 7. clamping plate; 8. disassembly support plate; 9. baffle; 10. rack; 11. rack end plate; 12. slide rail; 13. bolt; 14. limit rod; 15. disassembly sleeve; 16. rotating shaft; 17. gear; 18. mechanical seal; 19. hexagonal plate; 20. top shaft bolt; 21. top shaft bolt disassembly rod; 22. hexagonal disassembly head; 23. rotating disk; 24. socket; 25. plug rod. DETAILED DESCRIPTION

[0027] Embodiment 1, as Figure 1-Figure 2As shown, a disassembly tool for a vertical long-axis multistage pump proposed by the present invention includes a workbench 1, and a vertical long-axis multistage pump 2 is vertically fixed on the workbench 1. Specifically, a plurality of fixing holes 3 are arranged on the workbench 1, and a base of the vertical long-axis multistage pump 2 is connected to the workbench 1 through a plurality of bolts passing through the fixing holes 3; and also includes a disassembly support plate 8, a top shaft bolt disassembly assembly and a support mechanism, which are specifically as follows:

[0028] The support plate 8 is disassembled, and the top end cover of the vertical long-axis multistage pump 2 is passed horizontally. The disassembly sleeve 15 is vertically and rotatably arranged at the bottom of the disassembly support plate 8. When the mechanical seal 18 on the vertical long-axis multistage pump 2 is disassembled, the disassembly sleeve 15 is fitted on the hexagonal plate 19 of the mechanical seal 18. A rotating assembly for driving the disassembly sleeve 15 to rotate is arranged on the disassembly support plate 8. The rotating assembly drives the disassembly sleeve 15 to rotate, which can drive the hexagonal plate 19 and the mechanical seal 18 to rotate, so that the mechanical seal 18 can be quickly disassembled from the vertical long-axis multistage pump 2;

[0029] The top shaft bolt disassembly assembly is arranged on the disassembly support plate 8. The top shaft bolt disassembly assembly is used to loosen the top shaft bolt 20 on the mechanical seal 18. The force-applying member of the top shaft bolt disassembly assembly is located on the outer side of the top end cover of the vertical long-axis multi-stage pump 2. The force-applying point is changed from being in a narrow space to being in an external space, which is more convenient for applying force. In particular, when the top shaft bolt 20 is rusted and difficult to disassemble, when loosening the top shaft bolt 20, the impeller shaft is manually rotated as needed to drive the top shaft bolt 20 toward the top shaft bolt disassembly assembly, and then the top shaft bolt 20 is loosened. Three top shaft bolts 20 are usually provided. After loosening one, the impeller shaft is rotated to make the other top shaft bolt 20 face the top shaft bolt disassembly assembly, and the operation is performed in sequence to loosen all three top shaft bolts 20; wherein the disassembly support plate 8, the disassembly sleeve 15, the rotating assembly and the top shaft bolt disassembly assembly constitute a disassembly mechanism;

[0030] And a support mechanism is arranged on the workbench 1 to provide a limit for the disassembly support plate 8. The support mechanism can rotate 360 ​​degrees in a plane to ensure that the disassembly support plate 8 can be rotated for disassembly work.

[0031] Embodiment 2, as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the present invention proposes a disassembly tool for a vertical long-axis multi-stage pump. Compared with the first embodiment, this embodiment introduces the structure of the support mechanism in detail.

[0032] The supporting mechanism comprises a rotating ring 4 rotatably arranged on the workbench 1, two supporting rods 5 vertically arranged on the rotating ring 4, a supporting block 6 arranged on the top of the two supporting rods 5, and two clamping plates 7 arranged on the supporting block 6; the two supporting rods 5 are respectively located at the two ends of the diameter of the rotating ring 4, and the gap between the two clamping plates 7 is for the disassembly support plate 8 to pass through. A baffle plate 9 is arranged at one end of the disassembly support plate 8. When the mechanical seal is disassembled, the baffle plate 9 contacts the outer side of the supporting block 6. In order to enable the disassembly sleeve 15 to be smoothly sleeved on the hexagonal plate 19, the baffle plate 9 is arranged as an elastic plate, such as an elastic rubber plate, which can overcome the vertical long-axis multi-stage pump 2 Manufacturing deviation, the elastic baffle 9 can also provide a limit for disassembling the support plate 8. When disassembling the mechanical seal, the two ends of the disassembly support plate 8 are respectively located on the inner side of the two clamping plates 7, and the clamping plates 7 and the baffle 9 provide a limit. Then, the clamping plates 7 at both ends are respectively held with both hands, and the mechanical seal 18 can be loosened by applying force to rotate. The initial stage is the most difficult to twist. By disassembling the support plate 8 to lengthen the force arm, the mechanical seal 18 can be rotated more easily, and then the mechanical seal 18 can be driven to rotate by the rotating assembly, so that the mechanical seal 18 can be quickly disassembled. There is no need to use a traditional wrench to drive the mechanical seal 18 to rotate bit by bit, and the disassembly efficiency is higher.

[0033] Embodiment three, as Figure 2 As shown, the present invention proposes a disassembly tool for a vertical long-axis multi-stage pump. Compared with the first or second embodiment, this embodiment introduces the structure of the rotating assembly in detail.

[0034] The rotating assembly includes a rotating shaft 16 vertically arranged at the top center position of the disassembly sleeve 15, a gear 17 arranged on the rotating shaft 16, and a rack 10 slidably arranged on the disassembly support plate 8. Specifically, a slide rail 12 is arranged on the rack 10, and a slide groove is arranged on the side of the disassembly support plate 8, and the slide rail 12 cooperates with the slide groove; the rotating shaft 16 passes through the disassembly support plate 8, and the rack 10 is meshed with the gear 17; in order to prevent the disassembly sleeve 15 from rotating when the disassembly support plate 8 is rotated, a rack limit unit is arranged on the disassembly support plate 8.

[0035] Furthermore, the rack limiting unit includes a bolt 13 and a limiting rod 14. A threaded hole is arranged on the disassembly support plate 8, and the bolt 13 cooperates with the threaded hole. A limiting hole opposite to the threaded hole is arranged on the rack 10, and the limiting rod 14 is arranged at the end of the bolt 13 and cooperates to pass through the limiting hole; the position of the rack 10 is fixed by the limiting rod 14 so that it cannot move, thereby ensuring that the disassembly sleeve 15 will not rotate on its own. When the initial stage of loosening the mechanical seal 18 is completed, the bolt 13 is rotated to pull the limiting rod 14 out of the limiting hole, pushing the rack 10 to rotate, and then the disassembly sleeve 15 is driven to rotate quickly through the gear 17 and the rotating shaft 16, so that the mechanical seal 18 can be quickly disassembled.

[0036] Furthermore, one end of the rack 10 is located in the middle of the disassembly support plate 8, and the other end extends outside the disassembly support plate 8, and a rack end plate 11 is provided at an end away from the disassembly support plate 8. When the mechanical seal 18 cannot be disassembled by rotating the disassembly support plate 8 in the initial stage of disassembly, the rack end plate 11 can be hammered to drive the disassembly sleeve 15 to rotate through the instantaneous impact force, thereby completing the initial rotational disassembly of the mechanical seal 18.

[0037] Embodiment 4, as Figure 2-Figure 4 As shown, the present invention proposes a disassembly tool for a vertical long-axis multi-stage pump. Compared with the first embodiment, this embodiment introduces the structure of the top shaft bolt disassembly assembly in detail.

[0038] The top shaft bolt disassembly assembly includes a top shaft bolt disassembly rod 21 inserted into the disassembly support plate 8, and a hexagonal disassembly head 22 and a rotating disk 23 arranged at both ends of the top shaft bolt disassembly rod 21. The hexagonal disassembly head 22 is located outside the disassembly support plate 8, and the rotating disk 23 is located in the avoidance groove arranged on the disassembly support plate 8. A plurality of penetrating holes 24 are radially arranged on the rotating disk 23, and one of the holes 24 is matched to pass through the insertion rod 25. The torque can be increased by holding the insertion rod 25, and the rotating disk 23 can be easily driven to rotate, thereby loosening the top shaft bolt 20 through the hexagonal disassembly head 22.

[0039] Furthermore, when the top shaft bolt 20 is removed, the rotating disk 23 and the insertion rod 25 are located on the outside of the top end cover of the vertical long-axis multi-stage pump 2, and the disassembly sleeve 15 is located on the outside of the two support blocks 6. The rotating disk 23 and the insertion rod 25 are both located on the outside of the top end cover of the vertical long-axis multi-stage pump 2, avoiding operation in a small space and making disassembly more convenient.

[0040] Embodiment 5, based on the mechanical seal disassembly method of the above-mentioned disassembly tool embodiment of a vertical long-axis multi-stage pump, comprises the following steps:

[0041] S1, fix the vertical long-axis multistage pump 2 on the workbench 1, and fix the base of the vertical long-axis multistage pump 2 by multiple bolts;

[0042] S2, remove the protective cover of the top end cover of the vertical long-shaft multistage pump 2 to expose the coupling, then remove the coupling to expose the mechanical seal 18, and then remove the motor;

[0043] S3. Loosen the three top shaft bolts 20 in sequence through the top shaft bolt disassembly assembly. Specifically, rotate the impeller shaft to rotate the top shaft bolt 20 to a suitable angle, insert the hexagonal disassembly head 22 into the hexagonal hole of the head of the top shaft bolt 20, hold the disassembly support plate 8 with one hand, insert the insertion rod 25 into the insertion hole 24 with the other hand, and then rotate the insertion rod 25. The hexagonal disassembly head 22 is driven to rotate by the rotating disk 23, thereby loosening the top shaft bolt 20. Since the rotating disk 23 and the insertion rod 25 are both located in the external space, the operation is convenient, and the insertion rod 25 can provide a longer torque, and the operation is more labor-saving;

[0044] S4, limit the two ends of the disassembly support plate 8 by the support mechanism, and make the disassembly sleeve 15 sleeve on the hexagonal plate 19, rotate the disassembly support plate 8 to loosen the mechanical seal 18, specifically, the two ends of the disassembly support plate 8 are respectively located between the two clamping plates 7, and then hold the clamping plates 7 at both ends with both hands, and apply force to rotate to loosen the mechanical seal 18. It is the most difficult to twist in the initial stage. By lengthening the force arm by disassembling the support plate 8, the mechanical seal 18 can be rotated more easily;

[0045] S5. Drive the disassembly sleeve 15 to rotate through the rotating assembly to quickly disassemble the mechanical seal 18. Specifically, tighten the bolt 13, pull the limit rod 14 out of the limit hole on the rack 10, release the movement restriction of the rack 10, and then push the rack 10 with force. The disassembly sleeve 15 can be driven to rotate through the gear 17 and the rotating shaft 16, thereby driving the mechanical seal 18 to rotate, and the mechanical seal 18 can be quickly unscrewed from the vertical long-axis multi-stage pump 2.

[0046] In summary, when the present invention is in use, first fix the vertical long-axis multistage pump 2 on the workbench 1, remove the protective cover of the top end cover of the vertical long-axis multistage pump 2 to expose the coupling, then remove the coupling to expose the mechanical seal 18, then remove the motor, and then loosen the three top shaft bolts 20 in sequence through the top shaft bolt disassembly assembly, then limit the two ends of the disassembly support plate 8 through the support mechanism, and make the disassembly sleeve 15 sleeve on the hexagonal plate 19, rotate the disassembly support plate 8 to loosen the mechanical seal 18, and finally drive the disassembly sleeve 15 to rotate through the rotating assembly to quickly disassemble the mechanical seal 18.

[0047] In the present invention, the rotating disk 23 and the insert rod 25 are both located outside the narrow space of the top end cover, which makes the operation more convenient and labor-saving, and can quickly loosen the top shaft bolt 20. Especially when the top shaft bolt 20 is rusted and requires a large rotational force, the insert rod 25 can lengthen the torque, which has the effect of saving labor and smoothly loosens the top shaft bolt 20; the disassembly sleeve 15 does not need to pass through the through hole of the motor output shaft, but directly passes through the top end cover horizontally, and then the disassembly sleeve 15 is sleeved on the hexagonal plate 19, and there is no need to consider the size of the motor output shaft through hole and the size of the hexagonal plate 19. It can adapt to the disassembly of the mechanical seal 18 on more models of vertical long-axis multi-stage pumps 2, and has a wide range of uses. In addition, through the setting of the rotating assembly, after the mechanical seal 18 completes the initial stage of loosening, the mechanical seal 18 can be quickly disassembled, avoiding the problem of repeated operations in a narrow space to unscrew the mechanical seal 18, and improving the disassembly efficiency of the mechanical seal 18.

[0048] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A disassembly tool for a vertical long-axis multistage pump, comprising a workbench (1), on which a vertical long-axis multistage pump (2) is vertically fixed; characterized in that: Also includes: The disassembly support plate (8) is horizontally passed through the top end cover of the vertical long-axis multistage pump (2), and a disassembly sleeve (15) is vertically and rotatably arranged at the bottom of the disassembly support plate (8). When the mechanical seal (18) on the vertical long-axis multistage pump (2) is disassembled, the disassembly sleeve (15) is fitted on the hexagonal plate (19) of the mechanical seal (18), and a rotating assembly is arranged on the disassembly support plate (8) to drive the disassembly sleeve (15) to rotate; A top shaft bolt disassembly assembly is arranged on a disassembly support plate (8), the top shaft bolt disassembly assembly is used to loosen the top shaft bolt (20) on the mechanical seal (18), and a force-applying member of the top shaft bolt disassembly assembly is located on the outside of the top end cover of the vertical long-axis multi-stage pump (2); and a support mechanism, which is arranged on the workbench (1) and provides a limit for the disassembly support plate (8), and the support mechanism can rotate 360 ​​degrees within a plane, so as to ensure that the disassembly support plate (8) can be rotated for disassembly; The support mechanism comprises a rotating ring (4) rotatably arranged on a workbench (1), two supporting rods (5) vertically arranged on the rotating ring (4), a supporting block (6) arranged on top of the two supporting rods (5), and two clamping plates (7) arranged on the supporting block (6); the two supporting rods (5) are respectively located at two ends of the diameter of the rotating ring (4); a gap between the two clamping plates (7) is provided for a disassembly supporting plate (8) to pass through; a baffle plate (9) is provided at one end of the disassembly supporting plate (8); and when the mechanical seal is in a disassembly state, the baffle plate (9) contacts the outer side of the supporting block (6).

2. The disassembly tool for the vertical long-axis multistage pump according to claim 1, characterized in that: The rotating assembly comprises a rotating shaft (16) vertically arranged at the top center position of the disassembly sleeve (15), a gear (17) arranged on the rotating shaft (16), and a rack (10) slidably arranged on the disassembly support plate (8); the rotating shaft (16) passes through the disassembly support plate (8), and the rack (10) is meshed with the gear (17); in order to prevent the disassembly sleeve (15) from rotating when the disassembly support plate (8) is rotated, a rack limiting unit is arranged on the disassembly support plate (8).

3. The disassembly tool for the vertical long-axis multistage pump according to claim 2, characterized in that: The rack limiting unit comprises a bolt (13) and a limiting rod (14); a threaded hole is provided on the disassembly support plate (8); the bolt (13) cooperates with the threaded hole; a limiting hole opposite to the threaded hole is provided on the rack (10); and the limiting rod (14) is provided at the end of the bolt (13) and cooperates to pass through the limiting hole.

4. The disassembly tool for the vertical long-axis multistage pump according to claim 2, characterized in that: One end of the rack (10) is located in the middle of the disassembly support plate (8), and the other end extends outside the disassembly support plate (8), and a rack end plate (11) is provided at the end away from the disassembly support plate (8).

5. The disassembly tool for the vertical long-axis multistage pump according to claim 1, characterized in that: The top shaft bolt disassembly assembly comprises a top shaft bolt disassembly rod (21) inserted into a disassembly support plate (8), and a hexagonal disassembly head (22) and a rotating disk (23) arranged at both ends of the top shaft bolt disassembly rod (21), the hexagonal disassembly head (22) being located outside the disassembly support plate (8), the rotating disk (23) being located in an avoidance groove arranged on the disassembly support plate (8), and a plurality of through-holes (24) being arranged radially on the rotating disk (23), wherein one of the holes (24) cooperates to pass through the insertion rod (25).

6. The disassembly tool for the vertical long-axis multistage pump according to claim 5, characterized in that: When the top shaft bolt (20) is removed, the rotating disk (23) and the insertion rod (25) are located outside the top end cover of the vertical long-axis multi-stage pump (2).

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