JP2010203255A - Overturning device for vertical centrifugal pump and disassembling method for the vertical centrifugal pump using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and stably overturn a vertical centrifugal pump 1 in a horizontal shaft condition; to facilitate overturning operation of the vertical centrifugal pump 1; and to improve maintenance of the vertical centrifugal pump 1. <P>SOLUTION: The overturning device is installed on an installation floor G of the vertical centrifugal pump 1 together with the vertical centrifugal pump 1, a plurality of contact members 44 and 45 are provided, which are brought into contact with a flange 16 on a suction nozzle 17 and a flange 19 on the delivery nozzle 20 of the vertical shaft type centrifugal pump 1 from the lower side. The vertical centrifugal pump 1 is supported from the lower side through the contact members 44 and 45, and is overturned around the suction nozzle 17 and the delivery nozzle 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rollover device for a vertical shaft centrifugal pump used during maintenance of a vertical shaft centrifugal pump, and a disassembling method of the vertical shaft centrifugal pump using the same.

  The mainstream of the centrifugal pump is a horizontal axis, but overseas, a vertical axis type (which has a horizontal axis installed so that the main axis is vertical), which requires less installation space, is often used. The external appearance of this vertical shaft type centrifugal pump is shown in FIGS. 1A, 1B and 1C, and the internal structure is shown in FIG. 1A is a front view of a vertical shaft centrifugal pump, FIG. 1B is a plan view of the vertical shaft centrifugal pump, FIG. 1C is a right side view of the vertical shaft centrifugal pump, and FIG. It is AA sectional drawing.

  As shown in FIGS. 1 (a), (b), (c) and FIG. 2, a vertical shaft centrifugal pump 1 includes a pump casing in which a main shaft 3 passes vertically through a substantially central portion of a double suction pump casing 2. The upper and lower portions of the main shaft 3 protrude from the upper and lower outer sides of the main shaft 3, and the upper and lower portions of the main shaft 3 are rotatably supported by the upper and lower outer bearings 4 and 5 of the pump casing 2. The upper end portion is directly connected to a motor or the like (not shown) installed directly above the vertical shaft centrifugal pump 1 by a shaft coupling 6, and the main shaft 3 is configured as a double suction type in which a double suction type impeller 7 is rotated in the pump casing 2. Has been.

  In addition, shaft sealing devices 8 and 9 made of a mechanical seal or the like are provided in a portion through which the main shaft 3 of the pump casing 2 passes, in order to prevent leakage of water and suction of air from the pump casing 2, and the pump casing 2 and the impeller 7. Between them, a liner ring 10 and possibly a wear ring 11 are provided in order to prevent the fixed pump casing 2 and the rotating impeller 7 from being slidably in contact with each other while preventing leakage of water.

  Further, the pump casing 2 has a split structure in which a vertical plane including the axis 3a of the main shaft 3 is split so that it can be disassembled and assembled during maintenance, and the rear casing 12 as a casing body and the front casing as a casing cover. 13, a pump foot 14 in the rear casing 12, a suction nozzle 17 that is a suction port having a suction port 15 and a pipe connection flange 16 at an end, a discharge port having a discharge port 18 and a pipe connection flange 19. A discharge nozzle 20 is provided. The suction nozzle 17 protrudes horizontally from the rear casing 12 toward the left side, the discharge nozzle 20 protrudes horizontally from the rear casing 12 toward the right side, and both nozzles 17 and 20 are coaxial (the vertical shaft type centrifugal pump 1 is viewed from the front). Is arranged on a single horizontal axis 21) orthogonal to the axis 3a of the main shaft 3. The pump foot 14 is provided with three front left and right and rear center, which are laid out in a triangular shape, and the two on the front left and right are arranged in front of the vertical plane including the axis 21.

  In the vertical shaft centrifugal pump 1 configured as described above, the pump foot 14 is fixed on the three pump bases 22 which are laid out in the same manner and fixed to the pump installation floor G such as a concrete foundation. A suction pipe (not shown) is connected to the suction port 15, and a discharge pipe (not shown) is connected to the discharge port 18. Finally, the main shaft 3 is directly connected to a motor or the like with a shaft coupling 6 and is operated in this installed state. As the operation starts, the main shaft 3 rotates the both suction type impellers 7 in the pump casing 2, so that water is sucked into the water from both the upper and lower sides of the impeller 7 through the suction port 15. Both energy of pressure and speed is applied and discharged from the discharge port 18 through the spiral chamber 23 formed in the pump casing 2 from the outer periphery of the impeller 7, and the velocity energy is compressed while passing through the spiral chamber 23. It is converted into energy, the altitude from a low place, or is intended to perform water feeding from the low pressure location in the high pressure location. In the vertical shaft centrifugal pump 1, the flow of water discharged from the impeller 7 is in a horizontal plane perpendicular to the vertical main shaft 3.

  Also in such a vertical shaft type centrifugal pump 1, as in other pumps, the rotating body 24 including the main shaft 3, the impeller 7 provided on the main shaft 3, the shaft seal devices 8 and 9, and the bearings 4 and 5 is periodically provided. Maintenance is required, and the pump disassembly work process at this time is shown in FIGS. FIG. 3 is an explanatory view of the front casing removing process of the vertical shaft centrifugal pump, FIG. 4 is an explanatory view of the rotary body extracting preparation process of the vertical shaft centrifugal pump, and FIG. 5 is an explanatory view of the rotating body extracting process of the vertical shaft centrifugal pump. is there.

  In this vertical shaft type centrifugal pump 1, the rotating body 24 is normally taken out without removing the suction pipe and the discharge pipe in the vertical state (installed state). First, as shown in FIG. 3, in the front casing removing step, the front casing 13 is slung using a crane or the like, the fixing bolt 25 of the front casing 13 is removed, and the front casing 13 is lifted and removed. Since the front casing 13 cannot be lifted as it is in the vertical state, the lifting is performed after the front casing 13 is once moved in the horizontal direction (forward). In FIG. 3, 26 is an eye bolt provided on the front casing 13 for slinging, 27 is a wire rope for slinging, 28 is leakage of water from the joint surface between the flange 12a of the rear casing 12 and the flange 13a of the front casing 13. In order to prevent this, it is a gasket provided between the joint surfaces of both flanges 12a and 13a.

  Next, as shown in FIG. 4, the fixing bolt 30 that fixes the bearing support 29 of the upper and outer bearings 4 to the rear casing 12 is removed and the front and rear parts are divided by the split surface of the pump casing 3 as shown in FIG. The fixing bolt 33 fixing the front bearing support 31 of the structured lower outer bearing 5 to the rear bearing support 32 is removed, and the fixing bolt 35 of the bearing cover 34 of the lower outer bearing 5 is removed to remove the front and rear bearing supports 31, The rotating body 24 can be removed from the rear casing 12 by removing it from 32.

  Next, as shown in FIG. 5, in the rotating body extraction step, the rotating body 24 is slung using a crane or the like and lifted and taken out. However, at this time, the rotating body 24 cannot be lifted as it is in the vertical state. Therefore, as with the front casing 13, the lifting is performed after the rotating body 24 is once moved in the horizontal direction (forward). In FIG. 5, reference numeral 36 denotes two eyebolts attached to the upper end portion of the main shaft 3 for slinging.

  After the rotary body 24 thus taken out is disassembled, inspected, maintained, and assembled, it is attached in the original pump assembly work in the reverse order of the pump disassembly work. Since the removal and installation are performed in the vertical axis state, the work has become very difficult. In other words, the position of the center of gravity of the front casing 13 is difficult to understand, and not only does the work of moving horizontally without breaking the suspended load become difficult and requires skill, but also the rotating body 24 is mechanically sealed with the mechanical seals 8 and 9 and the liner ring 10. Also, the work of moving horizontally without damaging the wear ring 11 is very difficult and requires skill.

  In this way, in contrast to the vertical shaft type centrifugal pump 1 in which the operation of taking out and attaching the rotating body 24 becomes very difficult and needs to be left to an expert, the horizontal shaft type centrifugal pump has the main shaft arranged horizontally and the pump casing has a horizontal main shaft. Since it has a split structure on the horizontal plane including the shaft core, it is not necessary to move the casing cover (upper casing) and the rotating body horizontally when removing and installing the rotating body. There is an advantage that it can be taken out and attached easily and does not need to be left to an expert.

  For this reason, the vertical shaft centrifugal pump 1 is strongly required to rotate (roll over) in the horizontal axis state at the installation site when performing maintenance.

  Patent Document 1 discloses a rollover method in which a vertical shaft pump is lifted by a chain block or the like and rotated in a suspended state during maintenance.

JP 2003-314495 A

  However, if the vertical shaft centrifugal pump 1 is to be rotated in a suspended state, the position of the center of gravity of the vertical shaft centrifugal pump 1 is difficult to understand, and the rotating operation is very difficult and requires skill. It takes time and effort. Also, since the rotation is in an unstable suspended state, it is necessary to give sufficient consideration to safety. In this respect, the difficulty of work increases, and the skill required for work increases proportionally. There was a problem of requiring labor.

  The present invention is configured so that the pump casing can be divided into a casing body and a casing cover on a plane including a vertical main shaft, pump feet, a suction port and a discharge port are provided in the casing body, and the casing cover is removed from the casing body. The vertical shaft centrifugal pump for taking out the rotating body including the main shaft and the impeller provided on the main shaft, the shaft seal device, and the bearing can be easily and stably rolled in the horizontal shaft state. An object of the present invention is to provide a roll-over device for a vertical-shaft centrifugal pump that simplifies the work and improves the maintainability of the vertical-shaft centrifugal pump and a method for disassembling the vertical-shaft centrifugal pump using the apparatus.

  The rollover device for a vertical shaft type centrifugal pump according to the present invention is configured so that a pump casing can be divided into a casing body and a casing cover on a plane including a vertical main shaft, and a pump foot, a suction port, and a discharge port are provided in the casing body, A rollover device for a vertical shaft centrifugal pump that removes the casing cover from the casing body and takes out the main shaft and an impeller provided on the main shaft, a shaft seal device, and a rotating body including a bearing, wherein the rollover device is placed on an installation floor A plurality of contact members that are installed together with the vertical shaft centrifugal pump and contact the circular portion at the suction port portion and the circular portion at the discharge port portion of the vertical shaft centrifugal pump from below are provided, The support member is supported from below via the contact member, and rolls over around the suction port portion and the discharge port portion.

  In this invention, it is preferable to provide the raising / lowering mechanism which lifts the said vertical shaft type centrifugal pump from an installation state in the state supported from the lower side via the said contact member.

  In the present invention, on the suction side and the discharge side of the vertical shaft type centrifugal pump, the upper frame body is erected and fixed to the installation floor of the vertical shaft type centrifugal pump, and the suction port portion and the discharge port portion of the vertical shaft type centrifugal pump are inserted. And a lower frame body having a frame that can be divided, the lower frame body having the contact member, and an upper frame body that is detachably fixed to the lower frame body. It is preferable to provide another contact member that makes contact with the circular portion and the circular portion of the discharge port portion from above.

  In the present invention, when there is a deviation between the circular core of the suction port portion of the vertical shaft type centrifugal pump and the circular core of the discharge port portion, the shaft is mounted on at least one of the circular portions, It is preferable to provide a centering member as an eccentric circular attachment for aligning the core.

  The vertical shaft centrifugal pump disassembly method of the present invention uses the vertical shaft centrifugal pump rollover device of the present invention, wherein the vertical shaft centrifugal pump is oriented so that the main shaft faces in the horizontal direction and the split surface of the pump casing is in a horizontal plane. After being arranged and rolled over in a horizontal axis state in which the casing cover is arranged on the upper side of the casing body, the upper casing cover is removed, and the rotating body is also taken out.

  According to the overturning device for a vertical shaft type centrifugal pump of the present invention, the circular portion in the suction port portion and the circular portion in the discharge port portion of the vertical shaft type centrifugal pump are supported on the installation floor of the vertical shaft type centrifugal pump through the contact member. The vertical shaft centrifugal pump can be rotated with the circular portion at the suction port and the circular portion at the discharge port as a fulcrum, so that the vertical centrifugal pump can be lifted and operated in the horizontal axis state. Can be rolled over easily and stably. Therefore, the vertical shaft centrifugal pump can be easily rolled over and the rollover operation can be simplified, so that the maintainability of the vertical shaft centrifugal pump can be improved.

  In addition, when providing a lifting mechanism, even if there is a pump foot that interferes with the pump base when the vertical spiral pump rolls over, the vertical spiral pump is lifted by the lifting mechanism to avoid interference between the pump base and the pump foot, The vertical shaft centrifugal pump can be rotated with the circular portion at the suction port and the circular portion at the discharge port as fulcrums, which restricts the layout of the pump foot to roll over the vertical spiral pump. Thus, the roll shaft can be firmly and stably installed on the installation floor of the vertical shaft centrifugal pump, and the rollover device can be generalized.

  When another contact member is provided, the circular portion in the suction port portion and the circular portion in the discharge port portion of the vertical shaft type centrifugal pump can be surrounded via the contact member and the other contact member. It is possible to prevent dropping of the spiral pump from the rollover device and improve safety, and it is possible to install the rollover device in the vertical shaft spiral pump regardless of whether it is permanently installed or temporarily installed with a structure in which the frame can be divided.

  In addition, when a centering member is provided as an attachment, even if there is a deviation between the axis of the vertical part of the suction port of the vertical shaft centrifugal pump and the axis of the circular part of the outlet, the misalignment is centered. The rollover device can be generalized by eliminating the mounting of the members and rotating the vertical shaft centrifugal pump around the circular portion or attachment at the suction port and the circular portion or attachment at the discharge port. it can.

  According to the disassembling method of the vertical shaft type centrifugal pump of the present invention, the removal work of the rotating body of the vertical shaft type centrifugal pump can be easily performed similarly to the horizontal shaft type centrifugal pump, and it is not necessary to entrust only to an expert. The maintainability of the vertical shaft centrifugal pump can be improved.

(A) is a front view of a vertical shaft type centrifugal pump, (b) is a plan view of the vertical shaft type centrifugal pump, and (c) is a right side view of the vertical shaft type centrifugal pump. It is AA sectional drawing of FIG.1 (b). It is explanatory drawing of the front casing removal process of a vertical shaft spiral pump. It is explanatory drawing of the rotary body extraction preparation process of a vertical shaft type centrifugal pump. It is explanatory drawing of the rotary body extraction process of a vertical shaft type centrifugal pump. (A) is a front view of a suction side frame of a roll-over device for a vertical shaft type centrifugal pump according to an embodiment of the present invention, (b) is a left side view of (a), and (c) is an embodiment of the present invention. The front view of the discharge side mounting frame of the vertical shaft type centrifugal pump rollover device is shown, (d) is a right side view of (c). FIG. 7 is a front view of the vertical shaft centrifugal pump in a state where the rollover device for the vertical shaft centrifugal pump of FIG. 6 is installed. It is a top view of the vertical shaft type centrifugal pump of the state which installed the rollover apparatus for vertical shaft type centrifugal pumps of FIG. FIG. 7 is a right side view of the vertical shaft centrifugal pump in a state where the rollover device for the vertical shaft centrifugal pump of FIG. 6 is installed. It is explanatory drawing of the front casing removal process in the horizontal axis state of a vertical shaft type centrifugal pump. It is explanatory drawing of the rotary body extraction preparation process in the horizontal axis state of a vertical shaft type centrifugal pump. FIG. 12 is an explanatory view of the rotating body take-out step in the horizontal axis state of the vertical shaft type centrifugal pump. It is explanatory drawing of a raising / lowering mechanism. (A) is explanatory drawing of a movable upper contact member, (b) is explanatory drawing of another movable upper contact member. FIG. 15 is an explanatory diagram of another lifting mechanism. FIG. 16 is an explanatory view of a centering member as an attachment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Embodiment 1 will be described with reference to FIGS. FIG. 6A is a front view of a suction side mount of a vertical shaft type centrifugal pump rollover device according to an embodiment of the present invention, FIG. 6B is a left side view of FIG. 6A, and FIG. FIG. 7 is a right side view of FIG. 7C, and FIG. 7 is a vertical shaft in a state where the roll-over device for the vertical-shaft centrifugal pump of FIG. 6 is installed. FIG. 8 is a front view of the centrifugal pump, FIG. 8 is a plan view of the vertical centrifugal pump in the state in which the upright type centrifugal pump rollover device in FIG. 6 is installed, and FIG. 9 is in the state in which the vertical type centrifugal pump rollover device in FIG. It is a right view of a vertical shaft type centrifugal pump.

  The vertical shaft type centrifugal pump shown in FIGS. 7 to 8 is the vertical type centrifugal pump 1 shown in FIGS. 1A, 1B, and 1C, but the suction port is provided so that the vertical type centrifugal pump 1 can be easily installed. The flange 16 of the 15 and the flange 19 of the discharge port 18 are connected to the suction pipe and the discharge pipe via loose flanges 37 and 38, respectively, and the axis that is the center of rollover (rotation) of the vertical spiral pump 1 The pump base 22 at the center of the rear portion disposed on the rear side of the vertical plane including 21 is provided with an anchor bolt passage groove 39 so that it can be removed laterally from between the installation floor G and the pump foot 14.

  As shown in FIGS. 6 (a), (b), (c), and (d) and FIGS. 7 to 9, the rollover device for the vertical shaft centrifugal pump is a vertical shaft centrifugal pump on the suction side and the discharge side of the vertical shaft centrifugal pump 1. One installation floor G is provided with a pair of pedestals 40 and 41 which are erected and fixed detachably with bolts.

  Further, on the suction side and discharge side bases 40 and 41, there are provided nozzles 17 and 20 and loose flanges 37 and 38 on the side and frame bodies 42 and 43 having inner holes of a size through which the pipes can be inserted. .

  The suction-side and discharge-side frames 42 and 43 are arranged in a plane perpendicular to the axis 21 that is the center of rollover of the vertical shaft type centrifugal pump 1, and the suction port 15 and the suction side 15 on the suction side and discharge side of the vertical shaft type centrifugal pump 1. Oppositely arranged in the direction of the axis 21 slightly outside the discharge port 18.

  Further, the lower half portions of the suction-side and discharge-side frame bodies 42 and 43 are brought into contact with the outer peripheral surfaces of the pipe connection flanges 16 and 19 at the ends of the nozzles 17 and 20 on the side, respectively, so Two lower contact members 44 and 45 that support the spiral pump 1 from below and roll over (rotate) around the axis 21 (suction side and discharge side nozzles 17 and 20) are provided.

  Further, the upper half portions of the suction side and discharge side frames 42 and 43 are also brought into contact with the outer peripheral surfaces of the pipe connection flanges 16 and 19 at the end portions of the nozzles 17 and 20 on the side, respectively, so that the lower contact member With the shafts 44 and 45 surrounding the flanges 16 and 19 (the movement in the vertical and longitudinal directions is restricted and only the rotation is allowed), the vertical shaft type centrifugal pump 1 is connected to the axis 21 (nozzles 17 and 20 on the suction side and the discharge side). One upper contact member 46, 47 that rolls over (rotates) around is provided.

  Each contact member 44, 45, 46, 47 is composed of a rolling contact member such as a bearing or a roller, and the upper contact members 46, 47 are arranged so that the rotation axis is in a vertical plane including the axis 21, and the lower contact member 44 and 45 are longitudinally symmetrical positions having a vertical plane including the axis 21 as a symmetry plane, arranged so as to contact the outer peripheral surfaces of the flanges 16 and 19 from the lower side, one upper contact member 46 and 47 and two lower contacts. The members 44 and 45 are laid out in a triangular shape, and the vertical shaft centrifugal pump 1 can be stably supported by a minimum number.

  Each contact member 44, 45, 46, 47 may be a sliding contact member that is in sliding contact with the flanges 16, 19. In that case, it is preferable to provide a sliding material such as PTFE on the sliding contact surface.

  The lower contact members 44 and 45 are brought into contact with the outer peripheral surfaces of the flanges 16 and 19, but other circular portions (for example, the inner peripheral surface and the outer peripheral surface of the nozzle portion, the flange 16) of the nozzles 17 and 20 on the suction side and the discharge side. , 19 may be brought into contact with the peripheral wall surfaces of the suction port 15 and the discharge port 18). At that time, when the contact members 44, 45, 46, 47 are brought into contact with the inner peripheral surface, the layout is an inverted triangle with the apex downward.

  Further, the suction-side and discharge-side frames 42 and 43 have a vertically divided structure, and U-shaped lower frames 42a and 43a that are integrally open to the mounts 40 and 41, and the lower frames 42a and 43a. It consists of U-shaped upper frame bodies 42b and 43b that open downward and are detachably fixed to both ends by bolts.

  When the rotary body 24 is taken out during maintenance of the vertical shaft type centrifugal pump 1, all bolts of the flange 16 and the loose flange 37 of the suction port 15 and the flange 19 and the loose flange 38 of the discharge port 18 are removed, and the front left and right pumps The fastening of the foot 14 and the pump base 22 is released, the pump base 22 at the center of the rear is removed from between the installation floor G and the pump foot 14, and the front casing 13 is slung through the eyebolt 26 using a crane or the like. The front casing 13 is lifted.

  Thereby, the vertical shaft centrifugal pump 1 has the outer peripheral surfaces of the pipe connection flanges 16 and 19 at the ends of both the suction side and the discharge side nozzles 17 and 20 by the installation of the vertical shaft type centrifugal pump rollover device. Since it is supported from the lower side by the contact members 44 and 45 and is surrounded by the lower contact members 44 and 45 and the upper contact members 46 and 47, the vertical axis state shown by the solid line in FIG. 9 changes to the horizontal axis state shown by the phantom line. It is possible to roll over (rotate) about the axis 21. At this time, since the pump base 22 at the center of the rear portion has been removed in advance, there is no interference with the pump foot 14 at the center of the rear portion. In FIG. 9, reference numeral 48 denotes a horizontal shaft connecting the installation surface G, for example, the pump foot 14 of the vertical shaft centrifugal pump 1 to hold the vertical shaft centrifugal pump 1 after the rollover in a horizontal axis state with the vertical shaft centrifugal pump rollover device. It is a shaft state fixing member.

  In this way, the vertical-shaft centrifugal pump 1 rolls over to the horizontal axis state and starts to take out the rotating body 24. The pump disassembly work process at this time is shown in FIGS. FIG. 10 is an explanatory view of the front casing removing process in the horizontal axis state of the vertical shaft type centrifugal pump, FIG. 11 is an explanatory view of the rotating body extraction preparation process in the horizontal axis state of the vertical shaft type centrifugal pump, and FIG. It is explanatory drawing of the rotary body extraction process in the horizontal axis state of a pump.

  Since the vertical shaft type centrifugal pump 1 is in a horizontal axis state, the main shaft 3 is horizontally disposed, and the pump casing 2 has a split structure in a horizontal plane including the shaft core 3a of the horizontal main shaft 3, as shown in FIG. In addition, in the front casing removing step, the front casing (upper casing) 13 is slung using a crane or the like, the fixing bolt 25 of the front casing 13 is removed, and the front casing 13 is simply lifted and removed.

  Next, as shown in FIG. 11, in the rotating body take-out preparation step, the fixing bolt 30 that fixes the bearing support 29 of the upper and outer bearings 4 to the rear casing 12 is removed and divided by the split surface of the pump casing 3. The fixing bolt 33 fixing the front bearing support 31 of the structured lower outer bearing 5 to the rear bearing support 32 is removed, and the fixing bolt 35 of the bearing cover 34 of the lower outer bearing 5 is removed to remove the front and rear bearing supports 31, The rotating body 24 can be removed from the rear casing 12 by removing it from 32.

  Next, as shown in FIG. 12, also in the rotating body taking-out step, the rotating body 24 is simply slung using a crane or the like, lifted and taken out. In FIG. 12, 36 is an eyebolt attached to the end of the main shaft 3 for slinging.

  As described above, when the rotating body 24 is taken out, the front casing 13 (upper casing) and the rotating body 24 do not need to be moved horizontally, but can be simply lifted as they are, so that the work is very easy and less skill is required. The removal operation of the rotating body 24 can be easily performed without damaging the seals 8 and 9, the liner ring 10 and the wear ring 11.

  After the rotary body 24 thus taken out is disassembled, inspected, serviced, and assembled, it can be easily mounted in the pump assembly work in the reverse order of the pump disassembly work. The workability of taking out and attaching can be improved.

  Next, a second embodiment will be described with reference to FIGS. 13, 14 (a) and 14 (b). The second embodiment is obtained by adding a lifting mechanism to the first embodiment. FIG. 13 is an explanatory diagram of the lifting mechanism.

  A lifting mechanism 49 shown in FIG. 13 is supported by the lower frame bodies 42a and 43a so as to be swingable, and has a pair of bell cranks 50 to which lower contact members 44 and 45 are attached at one end, and a pair of links to the pair of bell cranks 50. A telescopic screw shaft 52 that connects the distal end portion via 51, and a gear mechanism 54 that is attached to the gantry 40, 41 and interlocks and connects the operation handle 53 to the base end portion of the telescopic screw shaft 52; The rotation operation of the operation handle 53 is transmitted to the expansion / contraction screw shaft 52 through the gear mechanism 54, and the expansion / contraction of the expansion / contraction screw shaft 52 causes the pair of bell cranks 50 to swing in opposite directions via the pair of links 51. By expanding or contracting the distance between the two lower contact members 44 and 45, interference between the pump foot 14 and the pump base 22 at the rear center can be avoided when the vertical shaft centrifugal pump 1 rolls over. Lifted from up to a height installation state that is intended to allow roll a vertical-shaft type centrifugal pump 1 in the unnecessary removal of the rear center of the pump base 22. In FIG. 13, 55 is a lowering stopper for setting the lowest descending position (height of the installed state) of the vertical shaft centrifugal pump 1, and 56 is a rising stopper for setting the highest rising position of the vertical shaft centrifugal pump 1. It is.

  At this time, the upper contact members 46 and 47 need to be moved up and down following the vertical movement of the vertical shaft centrifugal pump 1. FIG. 14A is an explanatory diagram of the movable upper contact member, and FIG. 14B is an explanatory diagram of another movable upper contact member. The movable upper contact member 57 shown in FIG. 14A follows up and down of the vertical spiral pump 1 by a coil spring 58 that constantly biases the movable upper contact member 57 downward and a movable restriction 59 of the upper contact member 57. . The movable upper contact member 60 shown in FIG. 14B does not follow up and down of the vertical shaft centrifugal pump 1, but is moved up and down corresponding to the rising and lowering positions of the vertical shaft centrifugal pump 1 by operating the adjustment bolt 61. They are lifted and pushed down. In this case, movable upper contact members 57 and 60 may be used instead of the upper contact members 46 and 47 of the first embodiment. In this case, the upper contact members 46 and 47 absorb the component dimensions and assembly errors, and each contact is made. The members 44, 45, 46, 47 can be reliably brought into contact with the flanges 16, 19.

  FIG. 15 is an explanatory diagram of another lifting mechanism. The elevating mechanisms 62 and 63 shown in FIG. 15 divide the bases 40 and 41 into two upper and lower parts on a horizontal plane, and overlap the upper bases 40a and 41a and the lower bases 40b and 41b with the split surfaces of the bases 40 and 41. The flanges 64 and 65 are provided, and one lifting mechanism 62 is composed of a jack bolt that is screwed into the screw hole 66 of the upper flange 64 from above, pushes the tip against the lower flange 65 and pushes up the upper frame 40a, and the other lifting mechanism 63 is The upper and lower flanges 64 and 65 are threaded from below and screwed to a bolt 67 whose head is fixed to the lower flange 65 by welding or the like. It consists of a tightening nut, and the upper base is pushed up with a jack nut.

  Next, Embodiment 3 will be described with reference to FIG. The third embodiment is different from the first embodiment only in that the vertical shaft centrifugal pump is displaced in the axis of the nozzles 17 and 20 on the suction side and the discharge side. FIG. 16 is an explanatory view of a centering member as an attachment. The centering member 68 shown in FIG. 16 has a disk shape and is provided at an eccentric position with respect to it, and has a circular through hole 69 into which at least one of the flanges 16 and 19 is fitted, and the centering member 68 is fitted into the through hole 69. A fixing bolt 70 is provided to be fixed to one of the flanges 16 and 19. In FIG. 16, a centering member 68 is externally fitted to the flange 19 on the small diameter side (discharge side), and the axis of the flange 19 on the small diameter side (discharge side) and the axis of the flange 16 on the large diameter side (suction side) are coaxial. What is provided on 21a is shown. In addition, when the vertical shaft centrifugal pump does not have a circular portion, a cylindrical portion may be configured by attaching another member as an attachment.

  As mentioned above, although one embodiment of the vertical shaft type centrifugal pump rollover device according to the present invention has been described, the present invention is not limited to this embodiment, and various modifications may be made without departing from the scope of the present invention. It is something that can be done. The rollover device for a vertical-shaft centrifugal pump according to the present invention may be located outside the place where the pump is installed.

DESCRIPTION OF SYMBOLS 1 Vertical shaft type centrifugal pump 2 Pump casing 3 Main shaft 4,5 Bearing 7 Impeller 8 Shaft seal device 9 Shaft seal device 10 Liner ring 11 Wear ring 12 Rear casing 13 Front casing 14 Pump foot 15 Suction port 16 Flange 17 Suction nozzle 18 Exhaust Outlet 19 Flange 20 Discharge nozzle 24 Rotating body 40, 41 Mount 42, 43 Frame 42a, 43a Lower frame 42b 43b Upper frame 44, 45, 46, 47 Contact member 62, 63 Lifting mechanism 68 Centering member G Installation floor

Claims (5)

  The pump casing is configured to be split into a casing main body and a casing cover on a plane including a vertical main shaft, and a pump foot, a suction port, and a discharge port are provided in the casing main body, the casing cover is removed from the casing main body, and the main shaft An upright type centrifugal pump rollover device for taking out a rotating body including an impeller, a shaft seal device, and a bearing provided on the main shaft, wherein the rollover device is installed together with the vertical shaft type centrifugal pump on an installation floor, the vertical shaft type Provided a plurality of contact members to contact the circular portion in the suction port portion and the circular portion in the discharge port portion from the lower side, supporting the vertical shaft type centrifugal pump from the lower side through the contact member, A rollover device for a vertical shaft centrifugal pump, wherein the rollover device rolls around the suction port and the discharge port.   The rollover device for a vertical shaft type centrifugal pump according to claim 1, further comprising an elevating mechanism that lifts the vertical shaft type centrifugal pump from an installed state while supporting the vertical shaft type centrifugal pump from below.   An upper frame body and a lower frame body that are erected and fixed to the installation floor of the vertical shaft type centrifugal pump on the suction side and the discharge side of the vertical shaft type centrifugal pump and that are inserted through the suction port portion and the discharge port portion of the vertical shaft type centrifugal pump. A circular portion of the suction port portion of the vertical shaft centrifugal pump on the upper frame that is provided on a gantry provided with a frame that can be divided into the upper frame, the contact member is provided on the lower frame, and is detachably fixed to the lower frame; The rollover device for a vertical-shaft centrifugal pump according to claim 1 or 2, wherein another contact member is provided to contact the circular portion of the discharge port portion from above.   If there is a discrepancy between the axis of the circular part of the suction port of the vertical shaft centrifugal pump and the axis of the circular part of the discharge port, it is attached to at least one of the circular parts and the center of the two circular parts is aligned. The rollover device for a vertical-shaft centrifugal pump according to any one of claims 1 to 3, wherein a centering member is provided as a centered circular attachment.   The rollover device according to any one of claims 1 to 4, wherein the vertical shaft type centrifugal pump is configured such that the main shaft is oriented in a horizontal direction, and a split surface of the pump casing is disposed in a horizontal plane. A vertical shaft centrifugal pump disassembling method, characterized in that after rolling over to a horizontal axis state in which the casing cover is arranged on the upper side of the main body, the upper casing cover is removed and the rotating body is also taken out.

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