JP2015045250A - Pump lifting jig, pump lifting method, and pump disassembly method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable easy transportation of a rotation shaft and an impeller to improve the maintainability in a pump lifting jig, a pump lifting method, and a pump disassembly method.SOLUTION: A pump 10 includes: a casing 13 which is disposed along a vertical direction, the casing 13 where a suction port 11 is provided at the lower end side and a discharge port 12 is provided at a side part; a rotation shaft 15 which is disposed along the vertical direction in the casing 13 and is rotatably supported; and an impeller 16 fixed to a lower end part of the rotation shaft 15. A pump lifting jig 100 (150), which lifts the pump 10, is provided with: an attachment plate 101 (151) where a fitting hole 113 (161) in which an upper end part of the rotation shaft 15 fits is formed; a presser member 102 (152) which prevents the rotation shaft 15 from being dropped from the fitting hole 113 (161); and a connection member 104 (154) fixed to the attachment plate 101 (151), the connection member 104 (154) to which a shackle 132 (183) may be connected.

Description

  The present invention relates to a pump lifting jig, a pump lifting method, and a pump disassembling method in a pump applied to an axial flow pump, a mixed flow pump, and the like.

  The pump in which the rotation shaft is arranged along the vertical direction has a pumping pipe extending in the vertical direction toward the suction water tank, and a bend pipe whose upper part is bent along the horizontal direction. . And a rotating shaft is penetrated in the pumping pipe from the upper part, and the impeller is being fixed to the lower part. Therefore, when the rotary shaft is driven and rotated by the drive motor while the lower end opening of the pumping pipe is submerged in the fluid, the impeller rotates and the fluid flows into the pumping pipe, and the flow path is pumped upward to bend the bend. Discharged through the tube.

  Examples of such a pump include those described in the following patent documents. The vertical shaft pump described in Patent Document 1 includes a fluid suction port and a fluid discharge port, and a baffle that changes a flow direction in a flow path from the fluid suction port to the fluid discharge port. Moreover, the vertical shaft pump described in Patent Document 2 is a pump in which a pumping pipe and a bend pipe are connected and a main shaft having an impeller is disposed in the pumping pipe.

JP 2012-092806 A JP 2013-083242 A

  In the pump described above, a rotating shaft is disposed in a pumping pipe, and an impeller is attached to a lower portion of the rotating shaft, and it is necessary to periodically maintain the impeller. However, in a conventional pump, when removing an impeller with a rotating shaft, a pumping pipe will be removed and work will become difficult. Moreover, the rotating shaft to which the impeller is attached is heavy and needs to be transported safely.

  This invention solves the subject mentioned above, and aims at providing the pump lifting jig | tool, the pump lifting method, and the pump disassembly method which can transport a rotating shaft and an impeller easily, and improve maintainability.

  The pump lifting jig of the present invention for achieving the above object is a casing which is arranged along the vertical direction and has a suction port on the lower end side and a discharge port on the side, and a vertical in the casing. In a pump lifting jig that lifts a pump having a rotating shaft that is arranged along a direction and is rotatably supported, and an impeller fixed to the lower end portion of the rotating shaft, the upper end portion of the rotating shaft is A mounting plate in which a fitting hole capable of being fitted is formed; a pressing member that prevents the rotary shaft from dropping from the fitting hole; and a connecting member that is fixed to the mounting plate and to which a hanging tool can be connected. , Characterized by having.

  Accordingly, the upper end portion of the rotating shaft is fitted into the fitting hole of the mounting plate, and the hanging member is connected to the connecting member in a state where the holding member prevents the rotating shaft from dropping from the fitting hole. By raising, the rotating shaft can be lifted via the lifting jig. As a result, the rotating shaft and the impeller can be easily transported from the casing, and the maintainability can be improved.

  In the pump lifting jig of the present invention, the holding member is formed to have a larger diameter than the fitting hole, and a bolt is provided on the end of the rotating shaft from the side opposite to the side where the rotating shaft is fitted into the fitting hole. It is characterized by being fixable by.

  Therefore, it is possible to easily prevent the rotating shaft from dropping from the fitting hole by the presser member with a simple configuration.

  In the pump lifting jig according to the present invention, the connecting member is fixed in a direction substantially orthogonal to both side portions, and a direction substantially orthogonal to the mounting plate so as to pass through the center axis of the fitting hole. And is fixed to the mounting plate together with the reinforcing members, and the connecting member is connected to the hanger.

  Therefore, the connecting member, the reinforcing member, and the mounting plate are arranged and fixed in a substantially orthogonal direction, and sufficient strength in the lifting jig can be ensured to improve durability.

  In the pump lifting jig according to the present invention, the connecting members are respectively arranged on both sides of the fitting hole and fixed to the mounting plate, and the connecting members are connected to the lifting tool.

  Therefore, the two connecting members and the mounting plate are arranged and fixed in a direction substantially orthogonal to each other, so that sufficient strength in the lifting jig can be secured and durability can be improved, and the rotating shaft can be stabilized. Can be lifted.

  In the pump lifting jig of the present invention, the rotating shaft is formed with a stepped portion at an upper end portion to form a small diameter portion, and the small diameter portion can be fitted into the fitting hole, and the mounting plate It is characterized in that the stepped portion can be brought into contact with the lower surface of the plate.

  Therefore, the small-diameter portion of the rotating shaft is fitted into the fitting hole, and the stepped portion is in contact with the lower surface of the mounting plate, so that the rotating shaft and the mounting plate can be integrally connected without rattling.

  Further, the pump lifting method of the present invention includes a casing that is arranged along the vertical direction and is provided with a suction port at the lower end side and a discharge port at the side, and is arranged along the vertical direction in the casing. A pump lifting method for lifting a pump having a rotating shaft supported rotatably and an impeller fixed to a lower end portion of the rotating shaft, wherein a lifting jig is fixed to the upper end portion of the rotating shaft. A step of connecting a lifting tool to the lifting jig, a step of lifting the rotating shaft and the impeller from the casing by lifting the rotating shaft via the lifting jig by the lifting tool, It is characterized by having.

  Therefore, a lifting jig is fixed to the upper end of the rotating shaft, a lifting tool is connected to the lifting jig, and the rotating shaft is lifted by the lifting tool via the lifting jig so that the rotating shaft and the impeller are removed from the casing. As a result, the rotating shaft and the impeller can be easily transported from the casing, and the maintainability can be improved.

  In the pump lifting method of the present invention, a diffuser is fixed to the outer peripheral side of the impeller, and the rotating shaft, the impeller, and the rotating shaft are lifted by the lifting tool via the lifting jig. The diffuser is extracted from the casing.

  Therefore, in addition to the rotating shaft and the impeller, the diffuser can be easily transported from the casing, so that further maintainability can be improved.

  The pump disassembling method of the present invention includes a step of lifting and removing the drive device from the upper portion of the casing, a step of lifting and removing the cover from the upper portion of the casing, a step of lifting and removing the guide portion from the casing, and a rotating shaft. A step of fixing a lifting jig to the upper end portion of the blade, a step of connecting a lifting tool to the lifting jig, and lifting the rotating shaft by the lifting tool via the lifting jig to rotate the rotating shaft and the blade. And a step of extracting the vehicle from the casing.

  Therefore, it is possible to easily remove the rotating shaft and the impeller from the casing, thereby improving maintainability.

  The pump disassembling method of the present invention is characterized in that the rotating shaft, the impeller, and the diffuser are extracted from the casing by lifting the rotating shaft with the lifting tool through the lifting jig.

  Therefore, in addition to the rotating shaft and the impeller, the diffuser can be easily removed from the casing, thereby further improving maintainability.

  In the pump disassembling method of the present invention, the rotating shaft and the impeller are extracted from the casing by the hanging tool, and then the impeller is supported by a sideways jig installed at a predetermined position, and the rotating shaft is turned over. It is characterized by letting.

  Therefore, the rotating shaft and the impeller extracted from the casing are laid down and turned over by the jig, and the rotating shaft and the impeller can be easily maintained.

  According to the pump lifting jig, the pump lifting method, and the pump disassembling method of the present invention, since the lifting jig having the mounting plate, the pressing member, and the connecting member is used, the rotating shaft and the impeller can be easily transported from the casing. Maintainability can be improved.

FIG. 1 is a longitudinal sectional view showing the pump of this embodiment. 2 is a cross-sectional view taken along the line II-II in FIG. 1 showing the positioning structure of the casing and the diffuser. FIG. 3 is a front view of the pump lifting jig of the present embodiment. FIG. 4 is a side view of the pump lifting jig. FIG. 5 is a flowchart showing the pump disassembling method of this embodiment. FIG. 6 is a schematic diagram showing the pump disassembly method of this embodiment. FIG. 7 is a schematic diagram illustrating a pump disassembly method. FIG. 8 is a schematic diagram illustrating a pump disassembly method. FIG. 9 is a schematic diagram illustrating a pump disassembly method. FIG. 10 is a schematic diagram illustrating a pump disassembly method. FIG. 11 is a schematic diagram illustrating a pump disassembly method. FIG. 12 is a schematic diagram illustrating a pump disassembly method. FIG. 13 is a front view illustrating a modification of the pump lifting jig. FIG. 14 is a side view of the pump lifting jig.

  Exemplary embodiments of a pump lifting jig, a pump lifting method, and a pump disassembling method according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

  1 is a longitudinal sectional view showing the pump of this embodiment, FIG. 2 is a sectional view taken along the line II-II of FIG. 1 showing the positioning structure of the casing and the diffuser, and FIG. 3 is a front view of the pump lifting jig of this embodiment. 4 is a side view of the pump lifting jig, FIG. 5 is a flowchart showing the pump disassembling method of the present embodiment, FIGS. 6 to 12 are schematic views showing the pump disassembling method of the present embodiment, and FIG. FIG. 14 is a front view showing a modification of the pump lifting jig, and FIG. 14 is a side view of the pump lifting jig.

  In the present embodiment, as shown in FIG. 1, the vertical shaft pump 10 of the present embodiment is arranged in a casing 13 provided with a suction port 11 and a discharge port 12, a guide portion 14 provided in the casing 13, and the casing 13. A rotating shaft 15, an impeller 16 fixed to the rotating shaft 15, and a circulation portion 17.

  The casing 13 has a cylindrical shape, and includes an upper casing 21, a middle casing 22, and a lower casing 23 that are arranged in series along the vertical direction. The lower flange 21b of the upper casing 21 and the upper flange 22a of the middle casing 22 are joined by a plurality of bolts (nuts) 24, and the lower flange 22b of the middle casing 22 is joined to the upper flange 23a of the lower casing 23 by a plurality of bolts. (Nut) 25 is joined. As shown in FIG. 1, in the vertical shaft pump 10 of this embodiment, the inner casing 22 and the lower casing 23 have substantially the same inner diameter, and the upper casing 21 has a slightly larger inner diameter than the middle casing 22 and the lower casing 23. It is a dimension.

  The casing 13 is arranged along the vertical direction in the mounting hole 2 formed in the mounting base 1, is supported by being suspended by using the upper flange 21 a of the upper casing 21, and is sealed by a plurality of bolts 26 through a sealing material 27. It is fixed. The upper casing 21 is provided with a plurality of reinforcing ribs 21c that connect the outer peripheral portion and the upper flange 21a at predetermined intervals in the circumferential direction.

  And the suction opening 11 is formed in the casing 13 by the suction bell 28 being fixed to the lower end side of the lower casing 23. The suction bell 28 has a bell mouth shape with a large diameter toward the suction side (downward), and its upper end is joined to the lower flange 23 b of the lower casing 23 by a plurality of bolts (nuts) 29. In addition, the casing 13 is formed with the elbow piping portion 30 integrally with the middle casing 22, so that the discharge port 12 is formed on the side portion. The elbow piping section 30 forms a second flow path B that is curved at a substantially right angle from the first flow path A that is formed by the lower casing 23 and extends substantially along the vertical direction. In the elbow piping portion 30, the end portion protruding to the side of the middle casing 22 is finally substantially horizontal, and the discharge pipe 31 is connected to the flange portion 30a by a plurality of bolts 32. In addition, the elbow piping part 30 is provided with a plurality of reinforcing ribs 30b along the axial direction on the outer peripheral part at predetermined intervals in the circumferential direction.

  The guide unit 14 can guide the fluid sucked from the suction port 11 of the casing 13 toward the discharge port 12. This guide part 14 forms the 2nd flow path B with the elbow piping part 30. As shown in FIG. That is, the second flow path B includes an inner guide surface F1 positioned inside the bending direction in the elbow piping unit 30, a first outer guiding surface F2 positioned outside the bending direction in the elbow piping unit 30, and the guide unit 14. And a second outer guide surface F3 positioned outside in the bending direction. As shown in FIG. 1, the guide portion 14 has a second outer guide surface F3 of the guide portion 14 that is smooth without a step along the flow direction of the first outer guide surface F2 of the elbow pipe portion 30 and the second flow path B. It is arranged to be continuous. The second outer guide surface F3 of the guide portion 14 is also curved in the circumferential direction, and is arranged so as to be smoothly continuous with the inner surface of the middle casing 22 (elbow piping portion 30) without any step along the circumferential direction. .

  The guide portion 14 is integrally formed with an attachment tube 33 having a smaller diameter than the middle casing 22 at the upper portion. The mounting cylinder 33 has an upper flange 33a and a fitting portion 33b that hangs down from the outer periphery of the upper flange 33a. Further, reinforcing ribs 33 c are formed between the guide portion 14, the mounting cylinder 33 and the upper flange 33 a, and a plurality of the reinforcing ribs 33 c are provided at a predetermined interval in the circumferential direction of the mounting cylinder 33. In the mounting cylinder 33, the upper flange 33a is placed on the upper flange 22a of the middle casing 22, the fitting portion 33b is fitted to the inner peripheral surface of the middle casing 22, and the upper flange 33a is the upper flange 22a. Are joined by a plurality of bolts 34.

  In this case, the guide portion 14 can be carried into the casing 13 through the upper opening 13a formed in the casing 13, and can be carried out from the casing 13 to the outside of the casing 13 through the upper opening 13a. That is, the guide portion 14 can be attached to and detached from the middle casing 22 by a plurality of bolts 34, and can be carried in and taken out from above. Therefore, the guide part 14 is provided with a plurality of hanging brackets 35 on the upper flange 33a.

  The casing 13 is provided with a cover 41 that closes the upper opening 13a of the upper casing 21 at the upper end. The cover 41 has a disk shape, and an outer peripheral portion is placed on the upper flange 21 a of the upper casing 21 and fixed by a plurality of bolts 42. The cover 41 has a circular opening at the center, and the upper end of the support cylinder 43 is fitted. The support cylinder 43 is configured by connecting an upper support cylinder 44 and a lower support cylinder 45 by a connection cylinder 46, and is joined by a plurality of bolts (not shown). In the support cylinder 43, a fitting cylinder 47 joined to the upper support cylinder 44 is fitted in the opening of the cover 41.

  The support cylinder 43 has a diffuser (stator vane) 51 fixed to the lower end portion. The diffuser 51 includes a first diffuser 52 and a second diffuser 53. The first diffuser 52 includes a ring-shaped main body 52a, an inner casing 52b, and an outer casing 52c. The main body 52a and the inner casing 52b are connected at the upper end, and the inner casing 52b and the outer casing 52c are connected to a plurality of connecting ribs. They are connected by 52d. The second diffuser 53 includes an inner casing 53a and an outer casing 53b each having a ring shape, and the inner casing 53a and the outer casing 53b are connected by a plurality of connecting ribs 53c.

  In the first diffuser 52, the upper end portion of the main body 52 a is joined to the lower end portion of the lower support cylinder 45 in the support cylinder 43, and the outer casing 52 c is fitted to the inner peripheral surface of the lower casing 23. In this case, the 1st diffuser 52 is arrange | positioned along the inner peripheral wall of the lower end part of the lower casing 23, and as shown in FIG. 2, the positioning member is interposed between both. The positioning member includes a convex portion 54 formed on the outer peripheral portion of the outer casing 52c of the first diffuser 52 and a groove portion 55 formed on the inner peripheral portion of the lower casing 23. The convex portion 54 and the groove portion 55 are Relative movement is possible along the vertical direction, but relative movement is impossible along the horizontal circumferential direction. In addition, this positioning member (the convex part 54 and the groove part 55) may be one, and plural may be sufficient as it. Further, a groove portion may be formed on the outer peripheral portion of the first diffuser 52, and a convex portion may be formed on the inner peripheral portion of the lower casing 23. Further, the positioning member is not limited to the convex portion and the groove portion, and may be any shape that can position the first diffuser 52 and the lower casing 23 so as not to be relatively rotatable.

  In the second diffuser 53, the lower end portion of the outer casing 53 b is connected to the upper end portion of the outer casing 52 c in the first diffuser 52 by a plurality of bolts (nuts) 56. In the second diffuser 53, the flange portion 53 d of the outer casing 53 b is fitted to the inner peripheral surface of the lower casing 23. Therefore, the first flow path A is formed between the inner casings 52b and 53a and the outer casings 52c and 53b in the diffuser 51.

  As shown in FIG. 1, in the first diffuser 52, the diameter of the inner casing 52b and the outer casing 52c decreases toward the upper side, but the passage sectional area of the first flow path A increases. On the other hand, in the second diffuser 53, the passage cross-sectional area of the first flow path A is increased by increasing the diameter of the outer casing 53b upward. The second diffuser 53 has an upper end portion that is smoothly continuous with the elbow pipe portion 30 and the guide portion 14. That is, the end portion of the fluid guide surface F4 of the second diffuser 53 and the end portion of the second outer guide surface F3 of the guide portion 14 are disposed at substantially the same position in the radial direction of the middle casing 22.

  The support cylinder 43 is supported so as not to rotate in the circumferential direction by fitting the convex portion 54 of the diffuser 51 (first diffuser 52) fixed to the lower end portion shown in FIG. 2 into the groove portion 55 of the lower casing 23. . Further, the lower end of the convex portion 54 of the support cylinder 43 is in contact with the lower casing 23. In the support cylinder 43, the lower ends of the plurality of bolts 57 screwed into the cover 41 press and support the flange 47 a of the fitting cylinder 47 downward. Therefore, the support cylinder 43 is positioned in the axial direction with respect to the casing 13.

  The cover 41 has a seal box 61 inserted through the opening 41a. In the seal box 61, a flange portion 63 is integrally formed outside the cylindrical portion 62, and a lower portion of the cylindrical portion 62 is inserted into the fitting tube 47 of the support tube 43 with a predetermined gap. The flange portion 63 of the seal box 61 is fixed to the cover 41 with a plurality of bolts 64.

  The support cylinder 43 has the rotating shaft 15 disposed therein. The rotary shaft 15 is rotatably supported on the support cylinder 43 by three bearings 71a, 71b, 71c. In this case, the rotary shaft 15 can be moved in the axial direction by a predetermined distance with respect to the support cylinder 43 through the gaps between the bearings 71a, 71b, 71c. The rotating shaft 15 is configured by connecting an upper rotating shaft 72 and a lower rotating shaft 73 by a connecting portion 74. However, the rotating shaft 15 may be integrally formed without being divided. The bearing 71 a is mounted in the cylindrical portion 62 of the seal box 61, the bearing 71 b is mounted in the connecting cylinder 46 that also serves as the bearing box, and the bearing 71 c is mounted in the main body 52 a of the first diffuser 52. .

  The impeller 16 is fixed to the lower end portion of the rotary shaft 15 so as to be integrally rotatable. In the impeller 16, the main body 75 is fitted to the lower end portion of the rotary shaft 15 via the key 15 a, is fixed by a bolt 76, and the bolt 76 is covered with a cap 77. Further, the impeller 16 is integrally formed with an umbrella-shaped casing 78, and an upper end portion thereof is fitted to a lower end portion of the inner casing 52 b of the first diffuser 52 via a casing ring 79 so as to be relatively rotatable. In the impeller 16, a plurality of blades 80 are provided on the outer periphery of the casing 78 at equal intervals in the circumferential direction. Each blade 80 is arranged in the first flow path A.

  In this case, the casing 13, the rotating shaft 15, and the support cylinder 43 are disposed concentrically. The rotating shaft 15, the impeller 16, the support cylinder 43, and the diffuser 51 can be attached to the casing 13 from above and can be removed upward.

  In the seal box 61, a seal member (for example, a gland packing) 81 is mounted on the upper inner peripheral surface of the cylindrical portion 62, and is supported by a lid member 82. The seal member 81 seals between the outer peripheral surface of the rotary shaft 15 and the inner peripheral surface of the seal box 61 (support tube 43). In the seal box 61, a coolant supply port (coolant supply unit) 83 for supplying a coolant (cooling water) to the cylindrical portion 62 is formed, and a coolant supply line 84 is connected to the coolant supply port 83. ing. The coolant supply line 84 is also supplied to the seal member 81. On the other hand, in the impeller 16, a plurality of coolant discharge ports (coolant discharge portions) 85 are formed in the casing 78. Therefore, the coolant supplied to the coolant supply port 83 from the coolant supply line 84 descends between the rotary shaft 15 and the support pipe 43, cools the bearings 71 a, 71 b, 71 c, and then the impeller 16. The coolant is discharged from the coolant outlet 85 to the outside.

  The guide part 14 is provided with a circulation part 17 through which the fluid sucked from the suction port 11 can be circulated from the casing 13 to the space C above the guide part 14. The circulation part 17 is an opening formed in the guide part 14 at a position concentric with the rotary shaft 15 and the support cylinder 43, and is secured as a gap between the opening and the support cylinder 43. Further, a vent line 86 capable of discharging the air in the space C to the outside of the casing 13 is provided. The vent line 86 communicates from the space C to the outside of the casing 13 through the cover 41, and is provided with a relief valve (not shown) that opens at a predetermined pressure.

  The rotary shaft 15 is connected to a drive shaft 93 of a drive device (motor and speed reducer) 92 via a shaft coupling 91 at the upper end. The driving device 92 is supported by a mounting base 94 fixed to the cover 41 so as to surround the shaft coupling 91.

  In this embodiment, since the rotation shaft 15 is constituted by the upper rotation shaft 72, the lower rotation shaft 73, and the connecting portion 74 and is sufficiently long, an anti-sway member may be provided. That is, as shown in FIG. 3, the connecting cylinder 46 (bearing 71 b) constituting the support cylinder 43 is disposed so as to face the outer peripheral side of the mounting cylinder 33 in the guide member 14 in the radial direction. A reinforcing rib 96 is provided between the connecting cylinder 46 and the mounting cylinder 33. The reinforcing ribs 96 connect the connecting cylinder 46 and the mounting cylinder 33, and a plurality of reinforcing ribs 96 are provided at predetermined intervals in the circumferential direction. In this case, the fluid flow in the second flow path B is not disturbed by disposing the connecting cylinder 46 and the reinforcing rib 96 above the guide member 14.

  Therefore, when the drive device 92 is driven, the rotational force is transmitted to the rotary shaft 15 via the shaft coupling 91, and the rotary shaft 15 rotates. Then, the impeller 16 fixed to the tip end portion of the rotating shaft 15 rotates and the pressure in the casing 13, that is, the pressure in the first flow path A rises, so that the fluid enters the casing 13 from the suction port 11. Inhaled. Then, the fluid sucked into the casing 13 flows through the first flow path A upward in the vertical direction, and after being reduced in pressure by the diffuser 51, is guided by the guide portion 14, thereby passing through the second flow path B. It flows in the horizontal direction and is discharged from the discharge port 12 to the discharge pipe 31.

  When the fluid sucked into the casing 13 flows while being guided by the guide portion 14, the fluid flows from the circulation portion 17 to the space C above the guide portion 14, and the liquid level of the fluid in the casing 13 rises. At this time, the pressure in the space portion C rises, but since the air in the space portion C is discharged outside the casing 13 through the vent line 86, the pressure rise in the casing 13 is suppressed, and the fluid hunting in the casing 13 is suppressed. Is suppressed. Therefore, when the fluid sucked into the casing 13 is guided from the first flow path A to the guide section 14 and flows through the second flow path B, the flow section 17 is filled with the fluid. Thus, the flow is properly guided without being disturbed.

  In the vertical shaft pump 10 of this embodiment configured as described above, each component can be taken out by disassembling during maintenance of the rotary shaft 15 and the impeller 16. In this case, in this embodiment, when the rotary shaft 15 is lifted by the lifting tool, a lifting jig is used.

  As shown in FIGS. 3 and 4, the pump lifting jig 100 includes a mounting plate 101, a pressing member 102, a bolt 103, and a connecting member 104. On the other hand, the rotating shaft 15 is formed with a stepped portion 15b at the upper end, thereby forming a small diameter portion 15c smaller than the outer diameter, and a screw hole 15d at the end surface.

  The mounting plate 101 has a rectangular shape in plan view and a corner portion that is chamfered. In the mounting plate 101, the first mounting upper surface portion 111 at the center is formed to be lower than the second mounting upper surface portions 112 at the left and right side portions by a predetermined dimension. The first mounting upper surface portion 111 has a fitting hole 113 formed in the center portion of the mounting plate 101. The fitting hole 113 can be fitted to the upper end of the rotating shaft 15. That is, the mounting plate 101 has a small diameter portion 15c of the rotary shaft 15 fitted from below, and the stepped portion 15b can be brought into contact with the lower surface.

  The holding member 102 prevents the rotary shaft 15 from dropping from the fitting hole 113. The presser member 102 has a rectangular shape in plan view and a cross-section of a downward U shape. The pressing member 102 includes a flat upper surface portion 121 and left and right side surface portions 122 depending from both sides of the upper surface portion 121, and a through hole 123 is formed in the upper surface portion 121. The pressing member 102 is formed with a larger diameter than the fitting hole 113. The bolt 103 has a head portion 124 and a screw portion 125, the outer diameter of the head portion 124 is set larger than the through hole 123 of the presser member 102, and the outer diameter of the screw portion 125 is set smaller than the through hole 123. The shaft 15 can be screwed into the screw hole 15d.

  The connecting member 104 has a flat plate shape, and is fixed to the left and right second mounting upper surface portions 112 of the mounting plate 101 by welding. Each connecting member 104 is disposed on both sides of the fitting hole 113 and is erected so as to be parallel to each other and substantially perpendicular to the mounting plate 101. Each connecting member 104 is formed with a connecting hole 131 at the same position, and a shackle 132 as a connecting member in the hanger is connected by a connecting shaft 133. Each shackle 132 is connected to a wire rope (or chain or the like) 134 as a hanging tool.

  Therefore, the small shaft portion 15c of the rotating shaft 15 is fitted into the fitting hole 113 of the mounting plate 101 from below and the stepped portion 15b is brought into contact with the lower surface of the mounting plate 101, whereby the rotating shaft 15 with respect to the mounting plate 101 is contacted. Perform positioning. Then, in a state where the small-diameter portion 15 c of the rotating shaft 15 is fitted in the fitting hole 113 of the mounting plate 101, the first mounting upper surface portion so that the pressing member 102 contacts the end surface of the rotating shaft 15 from above the mounting plate 101. The bolt 103 is screwed into the screw hole 15d of the rotating shaft 15 through the through hole 123 of the pressing member 102 from above. Therefore, the pump lifting jig 100 can be fixed to the upper end portion of the rotating shaft 15, and the rotating shaft 15 can be lifted by the two wire ropes 134 via the shackle 132 connected to each connecting member 104. .

  In addition, the lifting jig | tool of a present Example is not limited to this structure. For example, as shown in FIGS. 13 and 14, the pump lifting jig 150 includes a mounting plate 151, a pressing member 152, a bolt 153, and a connecting member 154.

  The mounting plate 151 has a rectangular shape in plan view, and a corner portion is chamfered. The mounting plate 151 has a fitting hole 161 formed at the center. The fitting hole 161 can be fitted to the upper end portion of the rotating shaft 15. That is, the mounting plate 151 is fitted with the small diameter portion 15c of the rotating shaft 15 from below, and the stepped portion 15b can contact the lower surface. In this case, the mounting plate 151 has a recess 162 formed on the lower surface that is larger than the outer diameter of the rotating shaft 15, and the stepped portion 15 b of the rotating shaft 15 contacts the recess 162.

  The pressing member 152 prevents the rotary shaft 15 from dropping from the fitting hole 161. The pressing member 152 has a rectangular flat plate shape and is formed to have a larger diameter than the fitting hole 161. The presser member 152 has a through-hole 171 at the center. The bolt 153 has a head portion 172 and a screw portion 173. The outer diameter of the head portion 172 is set larger than the through hole 171 of the pressing member 152, and the outer diameter of the screw portion 173 is set smaller than the through hole 171. The shaft 15 can be screwed into the screw hole 15d.

  The connecting member 154 has a flat plate shape, and a plate-shaped reinforcing member 181 extending in a direction substantially orthogonal to both side portions is fixed thereto. The connecting member 154 is disposed along the left-right direction of the mounting plate 151 so as to pass through the central axis of the fitting hole 161. The connecting member 154 is disposed along a direction substantially orthogonal to the mounting plate 151 and is fixed to the mounting plate 151 together with the reinforcing members 181 by welding. The connecting member 154 is formed with a connecting hole 182, and a shackle 183 as a connecting member in the hanger is connected by a connecting shaft 184. The shackle 183 is connected to a wire rope (or chain or the like) 185 as a hanging tool.

  Therefore, the small-diameter portion 15c of the rotating shaft 15 is fitted from below into the fitting hole 161 of the mounting plate 151, and the stepped portion 15b is brought into contact with the lower surface of the mounting plate 151, whereby the rotating shaft 15 with respect to the mounting plate 151 is contacted. Perform positioning. Then, with the small diameter portion 15c of the rotating shaft 15 fitted in the fitting hole 161 of the mounting plate 151, the holding member 152 is placed from above the mounting plate 151 so as to contact the end surface of the rotating shaft 15, and the bolt 153 is screwed into the screw hole 15d of the rotary shaft 15 through the through hole 171 of the pressing member 152 from above. Therefore, the lifting jig 150 can be fixed to the upper end portion of the rotating shaft 15, and the rotating shaft 15 can be lifted by one wire rope 185 via the shackle 183 connected to the connecting member 154.

  Here, the disassembly (disassembly) method (lifting method) of the vertical shaft pump 10 of the present embodiment will be described.

  In the disassembling method (lifting method) of the pump 10, as shown in FIGS. 5 and 6, the drive device 92 is removed from the casing 13 in step S <b> 11. That is, first, the hanging tool 202 is connected to the plurality of hanging metal fittings in the driving device 92 via the wire rope 134. Next, the fixing of the drive device 92 to the mounting base 94 is released, and the coupling of the shaft coupling 91 is released (the shaft couplings 91a and 91b are separated). Then, the driving device 92 is lifted by the wire rope 201 from the crane (not shown) via the lifting tool 202 and the wire rope 134 and is transported to a predetermined position.

  When the drive device 92 is removed, as shown in FIGS. 5 and 7, the mounting base 94 is removed in step S12. That is, first, the hanging tool 202 is connected to the plurality of hanging brackets on the mounting base 94 via the wire rope 134. Next, the bolt is loosened to release the mounting base 94 from being fixed. Then, the mounting base 94 is lifted by the wire rope 201 from the crane (not shown) via the lifting tool 202 and the wire rope 134, and conveyed to a predetermined position. Subsequently, in step S13, the shaft coupling 91a fixed to the upper end portion of the rotary shaft 15 is removed, and the shaft joint 91a is lifted in the same manner as the mounting base 94 and conveyed to a predetermined position. Subsequently, in step S14, the bolt 64 is loosened to release the fixation of the seal box 61, and is lifted and transported to a predetermined position in the same manner as the mounting base 94 and the shaft coupling 91a.

  When the seal box 61 is removed, the cover 41 is removed in step S15 as shown in FIGS. That is, first, the hanging tool 202 is connected to the plurality of hanging metal fittings in the cover 41 via the wire rope 134. Next, the cover 41 is released from the casing 13. Then, the cover 41 is lifted by the wire rope 201 from the crane (not shown) via the hanging tool 202 and the wire rope 134, and conveyed to a predetermined position.

  When the cover 41 is removed, the guide portion 14 is removed in step S16 as shown in FIGS. That is, first, the hanging tool 202 is connected to the plurality of hanging brackets 35 in the guide portion 14 via the wire rope 134. Next, the bolt 34 is loosened to release the fixing of the guide portion 14 to the casing 13. And the guide part 14 is lifted via the lifting tool 202 and the wire rope 134 with the wire rope 201 from the crane which is not illustrated, and it conveys to a predetermined position.

  When the guide portion 14 is removed and carried out to the outside, as shown in FIGS. 5 and 10, the rotary shaft 15, the support tube 43, the impeller 16, and the diffuser 51 are removed in step S17. That is, first, the pump lifting jig 100 is fixed to the upper end portion of the rotating shaft 15. As shown in FIGS. 3 and 4, the presser member 102 is moved in a state in which the fitting hole 113 of the mounting plate 101 is fitted into the small diameter portion 15 c of the rotating shaft 15 and the mounting plate 101 is in contact with the stepped portion 15 b. The bolt 103 is screwed into the screw hole 15d of the rotary shaft 15 through the through hole 123 of the pressing member 102. Next, two wire ropes 134 are connected to each connecting member 104 of the lifting jig 100 via a shackle 132. And the rotating shaft 15 is lifted with the wire rope 201 from the crane which is not shown in figure. Then, the support tube 43, the impeller 16, and the diffuser 51 connected to the rotating shaft 15 can be lifted, and the rotating shaft 15, the support tube 43, the impeller 16, and the diffuser 51 are carried out to the outside.

  When the rotating shaft 15 is lifted and the support tube 43, the impeller 16 and the diffuser 51 are carried out together, as shown in FIGS. 5 and 11, the rotating shaft 15 is turned sideways and the impeller 16 is turned down in step S18. And maintain the diffuser 51 and the like. That is, the sideways jig 211 installed at a predetermined position has a triangular shape and can support the lower portion of the impeller 16. Therefore, when the rotary shaft 15, the support tube 43, the impeller 16, and the diffuser 51 are lifted and carried out from the casing 13, the impeller 16 is supported by the sideways jig 211. And as shown in FIG. 12, the rotating shaft 15 is laid down horizontally by processing a crane horizontally. In this state, maintenance of the rotating shaft 15, the support tube 43, the impeller 16, the diffuser 51, etc. is performed.

  Thereafter, after maintaining the rotary shaft 15, the support tube 43, the impeller 16, the diffuser 51 and the like, the rotary shaft 15, the support tube 43, the impeller 16, the diffuser 51, the guide portion 14, and the cover 41 are performed in the reverse procedure described above. The seal box 61, the shaft coupling 91, the mounting base 94, and the driving device 92 are attached to the casing 13.

  As described above, in the pump lifting jig of the present embodiment, the casing 13 is disposed along the vertical direction, the suction port 11 is provided at the lower end side, and the discharge port 12 is provided at the side portion. In a pump lifting jig 100 (150) for lifting a pump 10 having a rotary shaft 15 that is arranged along the vertical direction and is rotatably supported, and an impeller 16 that is fixed to the lower end of the rotary shaft 15. The mounting plate 101 (151) in which the fitting hole 113 (161) into which the upper end portion of the rotating shaft 15 can be fitted is formed, and the pressing member that prevents the rotating shaft 15 from dropping off from the fitting hole 113 (161). 102 (152) and a connecting member 104 (154) that is fixed to the mounting plate 101 (151) and to which the shackle 132 (183) can be connected.

  Accordingly, the small diameter portion 15c of the rotating shaft 15 is fitted into the fitting hole 113 (161) of the mounting plate 101 (151), and the rotating shaft 15 is dropped from the fitting hole 113 (161) by the holding member 102 (152). In a state in which the shaft is blocked, the shackle 132 (183) is connected to the connecting member 104 (154) and is lifted by the wire rope 134 (185), whereby the rotary shaft 15 is lifted via the lifting jig 100 (150). be able to. As a result, the rotating shaft 15 and the impeller 16 can be easily transported from the casing 13 to the outside, and the maintainability of the impeller 16 as a movable part can be improved.

  In the pump lifting jig of this embodiment, the holding member 102 (152) is formed to have a larger diameter than the fitting hole 113 (161) of the mounting plate 101 (151), and the rotary shaft 15 is formed in the fitting hole 113 (161). A pressing member 102 (152) is arranged on the end surface of the rotary shaft 15 from the opposite side to the fitting side, and can be fixed by a bolt 103 (153). Therefore, it is possible to easily prevent the rotary shaft 15 from dropping from the fitting hole 113 (161) by the presser member 102 (152) with a simple configuration.

  In the pump lifting jig of this embodiment, the connecting members 104 are arranged on both sides of the fitting holes 113 and fixed to the mounting plate 101, and the shackles 132 are connected to the connecting members 104, respectively. Therefore, the two connecting members 104 and the mounting plate 101 are arranged and fixed in a substantially orthogonal direction, and sufficient strength in the lifting jig 100 can be ensured. That is, when the rotary shaft 15 is lifted by the shackle 132 via the lifting jig 100 and laid sideways, the rotating shaft 15 and the lifting jig 100 rotate about the connecting shaft 133 with the shackle 132 as a fulcrum. Therefore, in the lifting jig 100, stress is applied not in the thickness direction of each connecting member 104 but in the plane direction, and damage is prevented. As a result, the durability of the lifting jig 100 can be improved and the rotating shaft 15 can be lifted stably.

  In the pump lifting jig according to the present embodiment, the reinforcing members 181 are fixed to the both side portions of the connecting member 154 in a direction substantially orthogonal to each other, and the connecting member 154 passes through the center axis of the fitting hole 161. The connecting member 154 and the reinforcing plate 181 are fixed to the mounting plate 151, and the shackle 183 is connected to the connecting member 154. Accordingly, the connecting member 154, the reinforcing member 181 and the mounting plate 151 are arranged and fixed in a substantially orthogonal direction, and sufficient strength in the lifting jig 150 can be ensured. That is, when the rotary shaft 15 is lifted by the shackle 183 via the lifting jig 150 and turned sideways, the rotary shaft 15 and the lifting jig 150 are subjected to stress in the thickness direction or the planar direction of the connecting member 154. However, since the connecting member 154 is reinforced by the reinforcing member 181, damage is prevented. As a result, the durability of the lifting jig 150 can be improved, and the rotating shaft 15 can be lifted stably.

  In the pump lifting jig of the present embodiment, the rotary shaft 15 is formed with a stepped portion 15b at the upper end portion to form the small diameter portion 15c, and the small diameter portion 15c can be fitted into the fitting hole 113 (161). The stepped portion 15b can be brought into contact with the lower surface of the mounting plate 101 (151). Therefore, the rotating shaft 15 and the mounting plate 101 (151) can be integrated together at a predetermined position without rattling.

  In the pump lifting method of the embodiment, the step of fixing the lifting jigs 100 and 150 to the upper end portion of the rotary shaft 15, the step of connecting the shackles 132 and 183 to the lifting jigs 100 and 150, and the shackle There is provided a step of lifting the rotary shaft 15 and the impeller 16 from the casing 13 by lifting the rotary shaft 15 via the lifting jigs 100 and 150 by the wire ropes 134 and 185 connected to 132 and 183. Therefore, it is possible to easily transport the rotary shaft 15 and the impeller 16 from the casing 13 and improve the maintainability.

  In the pump disassembling method of the embodiment, the step of lifting and removing the drive device 92 from the upper portion of the casing 13, the step of lifting and removing the cover 41 from the upper portion of the casing 13, and the guide portion 14 is lifted from the casing 13. A step of fixing the lifting jigs 100 and 150 to the upper end portion of the rotating shaft 15, a step of connecting the shackles 132 and 183 to the lifting jigs 100 and 150, and a wire connected to the shackles 132 and 183. A step of removing the rotary shaft 15 and the impeller 16 from the casing 13 by lifting the rotary shaft 15 via the ropes 134 and 185 is provided. Accordingly, it is possible to easily remove the rotary shaft 15 and the impeller 16 from the casing 13 and improve the maintainability.

  In the pump disassembling method of this embodiment, the rotary shaft 15, the impeller 16, and the diffuser 51 are extracted from the casing 13 by lifting the rotary shaft 15 via the lifting jigs 100 and 150. Accordingly, the diffuser 51 can be easily removed from the casing 13 in addition to the rotating shaft 15 and the impeller 16, and further maintainability can be improved.

  In the pump disassembling method of the present embodiment, after the rotary shaft 15 and the impeller 16 are extracted from the casing 13, the impeller 16 is supported by the sideways jig 211 installed at a predetermined position, and the rotary shaft 15 is rolled over. Therefore, the rotating shaft 15 and the impeller 16 extracted from the casing 13 are laid down and turned over by the jig 211, so that the rotating shaft 15 and the impeller 16 can be easily maintained.

  In the above-described embodiment, the diffuser 51 is fixed to the lower end portion of the support tube 43, and the diffuser 51 is supported on the casing 13 so as not to rotate in the circumferential direction by the convex portion 54 and the groove portion 55 as positioning members. The configuration is not limited. For example, the diffuser may be fixed to the lower end portion of the casing, and the lower end portion of the support pipe may be supported by the positioning member so as not to rotate in the circumferential direction. That is, the diffuser 51 may be fixed to either the support tube 43 side or the casing 13 side.

  In addition, the pump lifting jig, the pump lifting method, and the pump disassembling method of the present invention are not limited to the pump having the configuration described in the above-described embodiment because the rotating shaft 15 is lifted.

  In the above-described embodiment, the lifting jig 100 for two-point suspension or the lifting jig 150 for one-point suspension is used. However, a lifting jig for lifting three or more points may be used.

DESCRIPTION OF SYMBOLS 10 Vertical shaft pump 11 Suction port 12 Discharge port 13 Casing 14 Guide part 15 Rotating shaft 16 Impeller 17 Flowing part 21 Upper casing 22 Middle casing 23 Lower casing 28 Suction bell 30 Elbow piping part 33 Mounting cylinder 41 Cover 43 Support pipe 44 Upper support Tube 45 Lower support tube 46 Connection tube 47 Fitting tube 51 Diffuser 52 First diffuser 53 Second diffuser 54 Convex portion 55 Groove portion 61 Seal box 71a, 71b, 71c Bearing 72 Upper rotary shaft 73 Lower rotary shaft 74 Connection portion 80 Blade 83 Coolant supply port (coolant supply part)
84 Coolant supply line 85 Coolant outlet (coolant outlet)
86 Vent line 92, 122 Drive device 100, 150 Pump lifting jig 101, 151 Mounting plate 102, 152 Holding member 103, 153 Bolt 104, 154 Connecting member 113, 161 Fitting hole 132, 183 Shackle
A 1st flow path B 2nd flow path C Space part

Claims (10)

A casing which is arranged along the vertical direction and has a suction port on the lower end side and a discharge port on the side part;
A rotating shaft that is disposed along the vertical direction in the casing and is rotatably supported;
An impeller fixed to the lower end of the rotating shaft;
In a pump lifting jig for lifting a pump having
A mounting plate formed with a fitting hole into which the upper end of the rotating shaft can be fitted;
A holding member that prevents the rotary shaft from falling off from the fitting hole;
A connecting member fixed to the mounting plate and capable of connecting a hanging tool;
A pump lifting jig characterized by comprising:   The pressing member is formed to have a larger diameter than the fitting hole, and the rotating shaft can be fixed to the end of the rotating shaft by a bolt from the side opposite to the side fitting the fitting hole. The pump lifting jig according to claim 1.   Reinforcing members along the direction substantially orthogonal to both sides are fixed to the connecting member, respectively, and arranged along the direction substantially orthogonal to the mounting plate so as to pass through the center axis of the fitting hole. 3. The pump lifting jig according to claim 1, wherein the pump lifting jig is fixed to the mounting plate together with each reinforcing member, and the connecting member is connected to the hanging tool. 4.   The said connection member is each arrange | positioned at the both sides of the said fitting hole, is fixed to the said attachment plate, The said connection member in the said hanging tool is each connected, The Claim 1 or Claim 2 characterized by the above-mentioned. Pump lifting jig.   The rotating shaft has a small diameter portion formed by forming a stepped portion at an upper end portion, the small diameter portion can be fitted into the fitting hole, and the stepped portion is brought into contact with the lower surface of the mounting plate. The pump lifting jig according to any one of claims 1 to 4, wherein the pump lifting jig can be contacted. A casing which is arranged along the vertical direction and has a suction port on the lower end side and a discharge port on the side part;
A rotating shaft that is disposed along the vertical direction in the casing and is rotatably supported;
An impeller fixed to the lower end of the rotating shaft;
A pump lifting method for lifting a pump having
Fixing the lifting jig to the upper end of the rotating shaft;
Connecting a lifting tool to the lifting jig;
Removing the rotary shaft and the impeller from the casing by lifting the rotary shaft through the lifting jig by the lifting tool;
A pump lifting method characterized by comprising:   A diffuser is fixed to the outer peripheral side of the impeller, and the rotating shaft, the impeller, and the diffuser are removed from the casing by lifting the rotating shaft through the lifting jig by the lifting tool. The pump lifting method according to claim 6. Lifting the drive device from the top of the casing and removing it;
Lifting and removing the cover from the top of the casing;
Lifting and removing the guide portion from the casing;
Fixing the lifting jig to the upper end of the rotating shaft;
Connecting a lifting tool to the lifting jig;
Removing the rotary shaft and the impeller from the casing by lifting the rotary shaft via the lifting jig with the lifting tool;
A pump disassembling method characterized by comprising:   The pump disassembling method according to claim 8, wherein the rotating shaft, the impeller, and the diffuser are extracted from the casing by lifting the rotating shaft through the lifting jig by the lifting tool.   The rotary shaft and the impeller are pulled out from the casing by the lifting tool, and then the impeller is supported by a laterally laid jig installed at a predetermined position, and the rotary shaft is rolled over. The pump disassembling method according to claim 8 or 9.

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