Vertical pump alignment jig and vertical pump alignment method

Abstract

To improve alignment accuracy of a vertical pump, in a vertical pump alignment jig and a vertical pump alignment method.SOLUTION: In a vertical pump in which a rotational shaft is arranged inside a casing arranged along a vertical direction, an impeller is attached to a lower part of the rotational shaft, and a drive device is connected to an upper part thereof, an alignment jig for aligning an output shaft of the drive device with the rotational shaft comprises: a jig body that is detachably attached to the output shaft extending downward from the drive device; a lifting device that is provided on the jig body, and can lift the rotational shaft; and a rotation support device that rotatably supports the rotational shaft relative to the lifting device.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a vertical pump alignment jig and a vertical pump alignment method. [Background technology]

[0002] A vertical pump has a rotating shaft that is arranged vertically. The vertical pump has a lifting pipe and a vent pipe. The lifting pipe is arranged vertically, with its lower end extending toward the water tank. The vent pipe is connected to the upper part of the lifting pipe and bent from the vertical to the horizontal. The rotating shaft is arranged inside the lifting pipe, with a drive unit connected to its upper end and an impeller attached to its lower end. Therefore, when the drive unit is driven, the impeller rotates via the rotating shaft, and water from the water tank is sucked up from the lower end of the lifting pipe, rises, and is discharged through the bend pipe.

[0003] When inspecting a vertical pump, the drive unit is removed from the vertical pump. That is, when inspecting the vertical pump, the drive unit's output shaft is released from the vertical pump's rotating shaft, and the drive unit is lifted up and removed from the vertical pump using a crane. Then, when the inspection of the vertical pump is completed, the drive unit is lifted up using a crane and placed on top of the vertical pump, and the drive unit's output shaft is reconnected to the vertical pump's rotating shaft. An example of such a vertical pump is described in Patent Document 1 below. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 61-065300 Summary of the Invention [Problem to be solved by the invention]

[0005] When connecting the output shaft of a drive unit to the rotating shaft of a vertical pump, the horizontal position and inclination of the axis of the output shaft must be aligned with the axis of the rotating shaft. Conventionally, the drive unit is lifted and moved using a crane, and the output shaft is then moved to align it with the rotating shaft of the vertical pump. However, because the drive unit is heavy, when the crane lifts and moves the drive unit, the crane's boom can bend and deform, causing the drive unit to swing. This poses a challenge, making it difficult to properly align the output shaft of the drive unit with the rotating shaft of the vertical pump.

[0006] The present disclosure is devised to solve the above-mentioned problems, and aims to provide a vertical pump alignment jig and a vertical pump alignment method that improve the alignment accuracy of a vertical pump. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the alignment jig for a vertical pump of the present disclosure is an alignment jig for aligning the output shaft of the drive unit with the rotating shaft in a vertical pump in which a rotating shaft is arranged inside a casing arranged along the vertical direction, an impeller is attached to the lower part of the rotating shaft, and a drive unit is connected to the upper part, and the alignment jig includes: a jig main body that is detachable from the output shaft extending downward from the drive unit; an elevating device that is provided on the jig main body and can raise and lower the rotating shaft; and a rotation support device that rotatably supports the rotating shaft relative to the elevating device.

[0008] Furthermore, the method for aligning a vertical pump disclosed herein is a method for aligning an output shaft of a drive unit with a rotating shaft in a vertical pump in which a rotating shaft is arranged inside a casing arranged along the vertical direction, an impeller is attached to the lower part of the rotating shaft, and a drive unit is connected to the upper part, and includes the steps of attaching a jig main body to the output shaft extending downward from the drive unit, raising the rotating shaft using an elevating device provided on the jig main body, and rotating the rotating shaft relative to the elevating device to align it with the output shaft. [Effects of the Invention]

[0009] According to the vertical pump alignment jig and vertical pump alignment method of the present disclosure, it is possible to improve the alignment accuracy of the vertical pump. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing a vertical pump of this embodiment. [Figure 2] FIG. 2 is a schematic diagram showing the disassembly process of the vertical pump. [Figure 3] FIG. 3 is a detailed view showing the coupling structure between the output shaft and the rotary shaft of the driving device. [Figure 4] FIG. 4 is a front view showing the alignment jig for the vertical pump of this embodiment. [Figure 5] FIG. 5 is a plan view showing a positioning jig for a vertical pump. [Figure 6] FIG. 6 is a schematic diagram for explaining a method for aligning a vertical pump. DETAILED DESCRIPTION OF THE INVENTION

[0011] Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. Note that the present disclosure is not limited to these embodiments, and when there are multiple embodiments, the present disclosure also includes configurations that combine the embodiments. Furthermore, the components in the embodiments include those that can be easily imagined by a person skilled in the art, those that are substantially identical, and those that are within the so-called equivalent range.

[0012] [Embodiment] <Vertical pump> FIG. 1 is a schematic diagram showing a vertical pump of this embodiment.

[0013] As shown in FIG. 1, the vertical pump 10 includes a lifting pipe (casing) 11, a vent pipe (casing) 12, a rotating shaft 13, an impeller 14, and a drive unit 15.

[0014] The riser pipe 11 has a cylindrical shape and is arranged above a water intake tank (not shown) along a vertical axis O. A mounting base 21 is provided at the upper end of the riser pipe 11, and the mounting base 21 is supported by hanging from an upper support part 101. The middle part of the riser pipe 11 is supported by an intermediate support part 102 with a mounting bracket 22, and the lower end part is supported by a lower support part 103 with a mounting bracket 23. The riser pipe 11 is arranged so as to pass through through holes 104, 105, and 106 formed in the upper support part 101, the intermediate support part 102, and the lower support part 103.

[0015] A discharge bowl 24 is connected to the lower end of the lifting pipe 11, and a suction bell 25 is connected to the discharge bowl 24. The discharge bowl 24 has a spherical shape that bulges outward in the horizontal direction. The suction bell 25 has a bell-mouth shape that increases in diameter downward from the discharge bowl 24, and has a suction port 26 formed at its lower end.

[0016] The vent pipe 12 is connected to the mounting base 21 of the riser pipe 11. The vent pipe 12 has a curved shape that bends from the vertical direction to the horizontal direction. One end of the vent pipe 12 along the vertical direction is connected to the upper end of the riser pipe 11, and a discharge port 27 is formed at the other end along the horizontal direction. A discharge pipe (not shown) is connected to the discharge port 27 of the vent pipe 12.

[0017] The rotating shaft 13 is disposed inside the riser pipe 11. The rotating shaft 13 is disposed inside the riser pipe 11 along the vertical axis O, and is rotatably supported by a plurality of bearings (not shown) provided in the riser pipe 11. The impeller 14 is fixed integrally to the lower end of the rotating shaft 13. The impeller 14 is disposed inside the discharge bowl 24. The rotating shaft 13 and the impeller 14 are rotatable integrally about the vertical axis O.

[0018] The drive unit 15 is drivingly connected to the upper end of the rotation shaft 13. A support base 28 is connected to the upper part of the mounting base 21. The drive unit 15 is disposed on top of the support base 28. The drive unit 15 has a case 31, a drive motor 32, and an output shaft 33. The output shaft 33 has a motor shaft 34 and a motor-shaft-side coupling 35. The case 31 is detachably fixed to the upper part of the support base 28. The drive motor 32 is housed inside the case 31. The motor shaft 34 extends downward from the drive motor 32 along a vertical axis O. The motor-shaft-side coupling 35 is connected to the tip (lower end) of the motor shaft 34. The drive motor 32 can drive and rotate the motor shaft 34 and the motor-shaft-side coupling 35 that constitute the output shaft 33.

[0019] On the other hand, the rotating shaft 13 has a pump shaft 41 and a pump-shaft-side coupling 42. The pump shaft 41 is disposed inside the pumping pipe 11 along the vertical axis O. The pump-shaft-side coupling 42 is connected to the upper end of the pump shaft 41. The motor-shaft-side coupling 35 of the motor shaft 34 of the drive motor 32 and the pump-shaft-side coupling 42 of the pump shaft 41 are integrally connected. The rotational force of the motor-shaft-side coupling 35 is transmitted to the pump shaft 41 via the pump-shaft-side coupling 42, so that the pump shaft 41 can be driven to rotate.

[0020] Therefore, when the drive unit 15 is driven, a rotational force is transmitted to the rotary shaft 13, and the impeller 14 rotates together with the rotary shaft 13. When the impeller 14 rotates, an upward flow is generated inside the riser pipe 11, and water is sucked into the riser pipe 11 from the suction port 26 of the suction bell 25. The water sucked into the riser pipe 11 then flows upward in the vertical direction, is guided by the vent pipe 12, and is discharged from the discharge port 27 into the discharge pipe.

[0021] <Disassembly of a vertical pump> FIG. 2 is a schematic diagram showing the disassembly process of the vertical pump, and FIG. 3 is a detailed drawing showing the connection structure between the output shaft and the rotary shaft of the drive unit.

[0022] As shown in Fig. 2, during inspection of the vertical pump 10, the drive unit 15 is removed from the vertical pump 10. That is, in the vertical pump 10, first, the connection between the case 31 of the drive unit 15 and the support base 28 is released, and the connection between the output shaft 33 of the drive unit 15 and the rotating shaft 13 is released. Next, a crane (not shown) is moved, and the hoisting tool 111 is attached to the hoisting rope 112 connected to the drive unit 15. Next, the drive unit 15 is lifted by the crane (not shown) via the hoisting tool 111 and the hoisting rope 112, and removed from the vertical pump 10.

[0023] After the inspection of the vertical pump 10 is completed, the drive unit 15 is first lifted and moved using a crane and placed on the support base 28 of the vertical pump 10. Next, the case 31 of the drive unit 15 is connected to the support base 28, and the output shaft 33 of the drive unit 15 is coupled to the rotary shaft 13.

[0024] As shown in FIGS. 1 and 3 , in the drive unit 15, the drive motor 32 has an output shaft 33, and the output shaft 55 is composed of a motor shaft 34 and a motor-shaft-side coupling 35. That is, the motor shaft 34 extends downward from the drive motor 32 along the vertical axis O, and the motor-shaft-side coupling 35 is connected to its lower end. The motor-shaft-side coupling 35 has a coupling body 35a and a lower-end flange 35b. On the other hand, the rotating shaft 13 is composed of a pump shaft 41 and a pump-shaft-side coupling 42. That is, the pump shaft 41 is disposed along the vertical axis O, and the pump-shaft-side coupling 42 is connected to its upper end. The pump-shaft-side coupling 42 has a coupling body 42a and an upper-end flange 42b.

[0025] The lower flange 35b of the motor-shaft-side coupling 35 and the upper flange 42b of the pump-shaft-side coupling 42 face each other in the direction of the vertical axis O and are parallel to each other. The lower flange 35b and the upper flange 42b are tightly held together via a clamp 46. The clamp 46 is shaped like a two-part ring. The lower flange 35b and the upper flange 42b are fastened together with a plurality of bolts 47 and a number of nuts 48 provided on the outer periphery. By connecting the motor-shaft-side coupling 35 and the pump-shaft-side coupling 42, the motor shaft 34 and the pump shaft 41 of the drive motor 32, i.e., the drive unit 15 and the rotating shaft 13, are integrally connected. The support base 28 is provided with an access opening 29, through which an operator can connect and disconnect the motor-shaft-side coupling 35 and the pump-shaft-side coupling 42.

[0026] Incidentally, when connecting the motor shaft 34 of the drive unit 15 to the pump shaft 41 of the rotary shaft 13, it is necessary to align the horizontal positions of the motor shaft 34 and the pump shaft 41. For this reason, it is necessary to measure the amount of misalignment between the outer circumferential surface of the lower end flange 35b of the motor-shaft-side shaft coupling 35 connected to the motor shaft 34 and the outer circumferential surface of the upper end flange 42b of the pump-shaft-side shaft coupling 42 connected to the pump shaft 41. To measure this horizontal misalignment, it is necessary to measure the horizontal position of the lower end flange 35b relative to the upper end flange 42b at multiple positions around the circumference.

[0027] Furthermore, when connecting the motor shaft 34 of the drive unit 15 to the pump shaft 41 of the rotary shaft 13, it is necessary to match the inclinations of the motor shaft 34 and the pump shaft 41 with respect to the vertical axis O. Therefore, it is necessary to measure the parallelism (amount of clearance) between the lower surface of the lower end flange 35b of the motor-shaft-side shaft coupling 35 connected to the motor shaft 34 and the upper surface of the upper end flange 42b of the pump-shaft-side shaft coupling 42 connected to the pump shaft 41. To measure this parallelism (amount of clearance), it is necessary to measure the distance of the clearance between the lower surface of the lower end flange 35b and the upper surface of the upper end flange 42b at multiple positions in the circumferential direction.

[0028] <Vertical pump alignment jig> FIG. 4 is a front view showing the positioning jig for the vertical pump of this embodiment, and FIG. 5 is a plan view showing the positioning jig for the vertical pump.

[0029] 4 and 5, the alignment jig 50 of this embodiment is used to align the output shaft 33 of the drive unit 15 and the rotating shaft 13 in the vertical pump 10. That is, the alignment jig 50 is used to measure the horizontal positions and inclinations of the motor-shaft-side coupling 35 connected to the motor shaft 34 and the pump-shaft-side coupling 42 connected to the pump shaft 41 relative to the vertical axis O when connecting the output shaft 33 of the drive unit 15 to the rotating shaft 13.

[0030] The alignment jig 50 includes a jig body 51 , an elevating device 52 , and a rotation support device 53 .

[0031] The jig body 51 is detachably attached to the output shaft 33 extending downward from the drive unit 15. The jig body 51 has a plurality of support frames 61 (two in this embodiment). However, the number of support frames 61 is not limited to two, and may be three or more. The plurality of support frames 61 are arranged at intervals (180 degrees in this embodiment) in the circumferential direction around the vertical axis O. The plurality of support frames 61 have the same shape. The plurality of support frames 61 are detachably attached to the output shaft 33, i.e., the lower end flange 35b of the motor shaft-side coupling 35, individually.

[0032] The support frame 61 has a horizontal U-shape. The support frame 61 has a first horizontal portion 61a, a first vertical portion 61b, a second horizontal portion 61c, a second vertical portion 61d, and a third horizontal portion 61e. The first horizontal portion 61a is located at the uppermost part of the support frame 61. The first horizontal portion 61a extends horizontally (in the radial direction of the motor-shaft-side coupling 35) when the support frame 61 is attached to the motor-shaft-side coupling 35. A support connecting hole 62 extending vertically is formed at one end of the first horizontal portion 61a. The motor-shaft-side coupling 35 has a plurality of (six in this embodiment) mounting holes 35c formed in the lower-end flange 35b at intervals in the circumferential direction. The support connecting hole 62 preferably has the same inner diameter as the mounting hole 35c.

[0033] The first vertical portion 61b is located below the first horizontal portion 61a. The first vertical portion 61b extends in the vertical direction when the support base 61 is attached to the motor-shaft-side coupling 35. The upper end of the first vertical portion 61b is integrally connected to the other end of the first horizontal portion 61a. The handle portion 63 is connected to the outer surface of the first vertical portion 61b. The second horizontal portion 61c is located below the first vertical portion 61b. The second horizontal portion 61c extends in the horizontal direction (the radial direction of the motor-shaft-side coupling 35) when the support base 61 is attached to the motor-shaft-side coupling 35. One end of the second horizontal portion 61c is integrally connected to the lower end of the first vertical portion 61b.

[0034] The second vertical portion 61d is located below the second horizontal portion 61c. The second vertical portion 61d extends along the vertical direction when the support frame 61 is attached to the motor-shaft-side coupling 35. An upper end of the second vertical portion 61d is integrally connected to the other end of the second horizontal portion 61c. The third horizontal portion 61e is located below the second vertical portion 61d. The third horizontal portion 61e extends along the horizontal direction (the radial direction of the motor-shaft-side coupling 35) when the support frame 61 is attached to the motor-shaft-side coupling 35. One end of the third horizontal portion 61e is integrally connected to the lower end of the second vertical portion 61d.

[0035] The support frame 61 has a horizontal U-shape with a first horizontal portion 61a, a first vertical portion 61b, and a second horizontal portion 61c, and is disposed so as to surround the lower end flange 35b and the upper end flange 42b. The first horizontal portion 61a of the support frame 61 is supported by the lower end flange 35b. That is, with the first horizontal portion 61a placed on the upper surface of the lower end flange 35b, the connecting pin 64 is inserted from above into the support connecting hole 62 and the mounting hole 35c of the lower end flange 35b, whereby the support frame 61 is suspended and supported by the motor-shaft-side coupling 35, i.e., the output shaft 33.

[0036] The lifting device 52 is provided on the jig body 51. The lifting device 52 is capable of raising and lowering the pump shaft 41 (rotating shaft 13) via the upper end flange 42b of the pump shaft side coupling 42 relative to the motor shaft side coupling 35 on which the jig body 51 is suspended and supported. The lifting device 52 has a plurality of jack devices 71 (two in this embodiment). The plurality of jack devices 71 are arranged at intervals in the circumferential direction of the vertical axis O. In other words, the plurality of jack devices 71 are provided on a plurality of support frames 61, respectively.

[0037] The jack device 71 has a jack body 71a and a drive rod 71b. The jack body 71a is fixed to the third horizontal section 61e of the support base 61. The drive rod 71b extends vertically upward from the jack body 71a. The jack device 71 can be driven, for example, by supplying or discharging hydraulic pressure, and a hydraulic supply / discharge 71c is provided on the jack body 71a. The hydraulic supply / discharge 71c of the jack device 71 is disposed in a through-hole 65 formed in the second vertical section 61d of the support base 61, and is connected to hydraulic piping (not shown).

[0038] The rotary support device 53 rotatably supports the pump shaft 41 (rotary shaft 13) relative to the lifting device 52 via the pump-shaft-side coupling 42. The rotary support device 53 has a plurality of support rollers 72. The plurality of support rollers 72 are provided at the tip end of the drive rod 71b of the jack device 71. That is, the jack device 71 has a support shaft 73 connected to the upper end of the drive rod 71b along an axis that extends horizontally (in the radial direction of the pump-shaft-side coupling 42). Two support rollers 72 are rotatably supported at each end of the support shaft 73. The support rollers 72 supported by the drive rod 71b of the jack device 71 rotatably support the lower surface of the upper-end flange 42b of the pump-shaft-side coupling 42 about the vertical axis O.

[0039] An adjustment bolt 66 is provided on the third horizontal portion 61e of the support frame 61. The adjustment bolt 66 is arranged horizontally and is movable radially of the pump shaft-side coupling 42. By rotating the adjustment bolt 66 and moving it forward, the tip thereof presses against the outer circumferential surface of the coupling body 42a of the pump shaft-side coupling 42. This causes the support frame 61 to swing slightly around the connecting pin 64 as a fulcrum, making it possible to adjust the angle of the support frame 61 relative to the pump shaft-side coupling 42.

[0040] The alignment jig 50 also has a plurality of measuring instruments 81, 82. The measuring instruments 81, 82 measure the relative position between the motor shaft side coupling 35 and the pump shaft side coupling 42. A plurality of measuring instruments 81, 82 are provided at intervals in the circumferential direction of the pump shaft side coupling 42.

[0041] The measuring device 81 is attached to the outer periphery of the upper end flange 42b of the pump shaft side coupling 42. The measuring device 81 has a measuring probe 81a, which contacts the outer periphery of the lower end flange 35b of the motor shaft side coupling 35. The measuring probe 81a measures the horizontal position of the motor shaft side coupling 35 relative to the pump shaft side coupling 42, i.e., the horizontal position of the motor shaft 34 relative to the pump shaft 41.

[0042] The measuring device 82 is attached to the outer periphery of the upper end flange 42b of the pump shaft side coupling 42. The measuring device 82 has a measuring probe 82a, which comes into contact with the lower surface of the lower end flange 35b of the motor shaft side coupling 35. The measuring probe 82a measures the vertical position of the motor shaft side coupling 35 relative to the pump shaft side coupling 42, i.e., the vertical position of the motor shaft 34 relative to the pump shaft 41.

[0043] <How to align a vertical pump> FIG. 6 is a schematic diagram for explaining a method for aligning a vertical pump.

[0044] The method for aligning a vertical pump in this embodiment includes the steps of attaching the jig body 51 to the output shaft 33 extending downward from the drive device 15, raising the rotating shaft 13 using the lifting device 52 provided on the jig body 51, and rotating the rotating shaft 13 relative to the lifting device 52 to align it with the output shaft 33.

[0045] As shown in Figure 6, an alignment jig 50 is attached to the output shaft 33 of the drive unit 15. Specifically, two support frames 61 are attached to the motor-shaft-side coupling 35 with connecting pins 64. Once the alignment jig 50 is attached, a centering jig 91 is first attached between the support cylinder 121 of the support base 28 and the pump shaft 41. Multiple measuring instruments 92 are attached to the support cylinder 121, and the horizontal position and movement of the pump shaft 41 are measured using the measuring instruments 92. The pump shaft 41 is centered, and the pump shaft 41 is positioned using positioning pins 93. Multiple measuring instruments 94 are attached to the centering jig 91. The jack device 71 is driven to raise the pump-shaft-side coupling 42 a predetermined amount, and the amount of lift is confirmed using the measuring instruments 94.

[0046] Attach measuring instruments 81, 82 to the pump shaft-side shaft coupling 42. Rotate the pump shaft 41 and the pump shaft-side shaft coupling 42 using a jig. At this time, check to see if the measurement values ​​of the measuring instruments 81, 82 fluctuate. Align the circumferential position of the pump shaft 41 with the motor shaft 34. Drive the jack device 71 to lower the pump shaft-side shaft coupling 42.

[0047] A plurality of adjustment screws 122 are attached to the top of the support base 28. A measuring instrument 95 is also attached to the top of the support base 28. While checking the horizontal position of the motor shaft 34 with the measuring instrument 95, the motor shaft 34 is centered using the plurality of adjustment screws 122. Once centering of the motor shaft 34 is complete, the measuring instrument 95 is adjusted to its zero point. The jack device 71 is driven, and the pump shaft-side coupling 42 is raised a predetermined amount. The measuring instruments 81 and 82 are adjusted to their zero points. The pump shaft 41 and the pump shaft-side coupling 42 are rotated 90 degrees using a jig, and measurement values ​​are obtained using the measuring instruments 81 and 82. The pump shaft 41 and the pump shaft-side coupling 42 are rotated another 90 degrees using the jig, and measurement values ​​are obtained using the measuring instruments 81 and 82 at each rotation position. The jack device 71 is driven, and the pump shaft-side coupling 42 is lowered, completing the measurement work. The worker adjusts the positions of the motor shaft 34 and the pump shaft 41 based on the measurement values ​​of the measuring instruments 81 and 82.

[0048] [Effects of this embodiment] The vertical pump alignment jig of the first embodiment comprises a jig body 51 that can be attached and detached to an output shaft 33 extending downward from a drive unit 15, a lifting device 52 that is provided on the jig body 51 and can raise and lower the rotating shaft 13, and a rotation support device 53 that supports the rotating shaft 13 rotatably relative to the lifting device 52.

[0049] According to the vertical pump alignment jig of the first aspect, a jig main body 51 is attached to the output shaft 33 of the drive unit 15, and an elevator device 52 and a rotary support device 53 are provided on the jig main body 51. Therefore, by driving the elevator device 52, the rotary shaft 13 is raised and lowered relative to the output shaft 33 of the drive unit 15, or the rotary shaft 13 is rotated relative to the output shaft 33 of the drive unit 15, thereby aligning the output shaft 33 with the rotary shaft 13. As a result, there is no need to lift and move the drive unit 15, which is a heavy object, using a crane or the like, and the alignment accuracy of the vertical pump 10 can be improved.

[0050] The vertical pump alignment jig according to the second aspect is the same as the vertical pump alignment jig according to the first aspect. The alignment jig further includes lifting device 52, which is a plurality of jack devices 71 that are arranged at intervals in the circumferential direction of rotating shaft 13 and can lift and lower rotating shaft 13 via upper end flange 42b on the rotating shaft 13 side. As a result, by arranging the plurality of jack devices 71 at intervals in the circumferential direction of rotating shaft 13, the rotating shaft 13 can be stably lifted and lowered by the plurality of jack devices 71.

[0051] The vertical pump alignment jig according to the third aspect is the vertical pump alignment jig according to the second aspect, and further includes a support roller 72 provided at the tip of a drive rod 71b of a jack device 71 and rotatable about a support shaft 73 extending in the horizontal direction. This allows the support roller 72 to stably rotate the rotation shaft 13 raised by the jack device 71.

[0052] The vertical pump alignment jig according to the fourth aspect is the vertical pump alignment jig according to any one of the first to third aspects, and further includes a jig body 51 having a plurality of support cradles 61 arranged at intervals in the circumferential direction of the rotating shaft 13, and the plurality of support cradles 61 are individually attachable to and detachable from the lower end flange 35b of the output shaft 33. This allows the plurality of support cradles 61 to be individually attachable to and detachable from the lower end flange 35b, improving the ease of attachment of the support cradles 61.

[0053] The vertical pump alignment jig according to the fifth aspect is the vertical pump alignment jig according to the fourth aspect, and further includes a support connecting hole 62 formed at the upper end of the support frame 61, and with the upper end placed on the upper surface of the lower end flange 35b, a connecting pin 64 is inserted into the support connecting hole 62 and the mounting hole 35c of the lower end flange 35b, whereby the support frame 61 is supported in a suspended state on the output shaft 33. This allows the support frame 61 to be easily supported in a suspended state on the output shaft 33.

[0054] The vertical pump alignment jig according to the sixth aspect is the vertical pump alignment jig according to the fourth or fifth aspect, and further includes a support frame 61 having a horizontal U-shape, an upper end supported by the lower end flange 35b, and a lifting device 52 disposed at the lower end. Thus, the support frame 61 having a horizontal U-shape can be suspended and supported by the motor shaft-side coupling 35 without interfering with the motor shaft-side coupling 35 and the pump shaft-side coupling 42, and the lifting device 52 can be appropriately disposed.

[0055] An alignment jig for a vertical pump according to a seventh aspect is the alignment jig for a vertical pump according to any one of the first to sixth aspects, and further comprises: the output shaft 33 is configured by connecting a motor-shaft-side coupling 35 to a tip end of a motor shaft 34 of a drive motor 32; the rotating shaft 13 is configured by connecting a pump-shaft-side coupling 42 to a tip end of a pump shaft 41; and includes measuring instruments 81 and 82 that measure the relative position of the motor-shaft-side coupling 35 and the pump-shaft-side coupling 36. This allows the measuring instruments 81 and 82 to appropriately measure the relative position of the output shaft 33 and the rotating shaft 13 via the motor-shaft-side coupling 35 and the pump-shaft-side coupling 36.

[0056] The vertical pump alignment method according to the eighth aspect includes the steps of attaching a jig body 51 to an output shaft 33 extending downward from a drive unit 15, raising the rotating shaft 13 using an elevating device 52 provided on the jig body 51, and rotating the rotating shaft 13 relative to the elevating device 52 to align it with the output shaft 33. This eliminates the need to lift and move the drive unit 15, which is a heavy object, using a crane or the like, and improves the alignment accuracy of the vertical pump 10.

[0057] In the above-described embodiment, the multiple support pedestals 61 constituting the jig body 51 are individually detachable from the lower end flange 35b of the motor-shaft-side coupling 35, but the present invention is not limited to this configuration. For example, the multiple support pedestals 61 may be connected by a connecting member so that they are detachable as a unit from the lower end flange 35b of the motor-shaft-side coupling 35.

[0058] In addition, in the above-described embodiment, the alignment jig 50 aligns the motor shaft side coupling 35 of the output shaft 33 and the pump shaft side coupling 42 of the rotating shaft 13, but it may also be a jig that directly aligns the output shaft 33 and the rotating shaft 13. [Explanation of symbols]

[0059] 10 Vertical pump 11. Riser pipe (casing) 12 Vent pipe (casing) 13 Rotation axis 14 impeller 15 Drive unit 21 Mounting base 22,23 Mounting bracket 24 Discharge Bowl 25 Intake Bell 26 Intake port 27 Discharge port 28 Support stand 29 Working opening 31 cases 32 Drive motor 33 Output shaft 34 Motor shaft 35 Motor shaft side coupling 41 Pump shaft 42 Pump shaft side coupling 50 Alignment jig 51 Jig body 52 Lifting device 53 Rotation support device 61 Support stand 62 Support connection hole 63 Handle 64 connecting pin 65 through holes 71 Jacking device 72 Support roller 73 Support shaft 81,82 Measuring instruments

Claims

1. In a vertical pump, a rotating shaft is disposed inside a casing disposed along a vertical direction, an impeller is attached to a lower part of the rotating shaft, and a drive unit is connected to an upper part of the rotating shaft. An alignment jig for aligning an output shaft of the drive unit with the rotating shaft, comprising: a jig body that is detachably attached to an output shaft that extends downward from the drive device; an elevating device provided on the jig body and capable of elevating the rotation shaft; a rotation support device that rotatably supports the rotation shaft relative to the lifting device; A vertical pump alignment jig equipped with:

2. the lifting device is a plurality of jack devices, which are arranged at intervals in the circumferential direction of the rotating shaft and are capable of lifting and lowering the rotating shaft via an upper end flange of the rotating shaft; 2. The vertical pump alignment jig according to claim 1.

3. The rotary support device is provided at the tip of the drive rod of the jack device and has a support roller that is rotatable around an axis along the horizontal direction. The vertical pump alignment jig according to claim 2.

4. The jig body has a plurality of support frames arranged at intervals in the circumferential direction of the rotation shaft, and the plurality of support frames are individually attachable to and detachable from the lower end flange of the output shaft.

2. The vertical pump alignment jig according to claim 1.

5. The support frame has a support connection hole at its upper end, and is supported by being suspended from the output shaft by inserting a connection pin into the support connection hole and the mounting hole of the lower end flange with the upper end placed on the upper surface of the lower end flange. The vertical pump alignment jig according to claim 4.

6. The support frame has a horizontal U-shape, the upper end portion is supported by the lower end flange, and the lifting device is disposed at the lower end portion. The vertical pump alignment jig according to claim 5.

7. The output shaft is configured by connecting a motor shaft side coupling to a tip end of a motor shaft of a drive motor, and the rotating shaft is configured by connecting a pump shaft side coupling to a tip end of a pump shaft, and has a measuring device that measures the relative position between the motor shaft side coupling and the pump shaft side coupling.

2. The vertical pump alignment jig according to claim 1.

8. In a vertical pump, a rotating shaft is disposed inside a casing disposed along a vertical direction, an impeller is attached to a lower part of the rotating shaft, and a driving device is connected to an upper part of the rotating shaft. The method for aligning the output shaft of the driving device and the rotating shaft comprises the steps of: a step of attaching the jig body to an output shaft extending downward from the driving device; a step of lifting the rotation shaft by an elevator device provided in the jig body; rotating the rotation shaft relative to the lifting device to align it with the output shaft; A method for aligning a vertical pump having the above structure.

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