JP2010242564A - Vertical shaft pump - Google Patents

Abstract

A vertical shaft pump in which a bearing sliding member of an intermediate bearing 19 in a pump pipe can be easily detached from a pump shaft 9 is provided.
A pump shaft 9 is divided into an upper pump shaft 9a and a lower pump shaft 9b, and the upper pump shaft 9a and the lower pump shaft 9b are connected by an intermediate shaft coupling 32 in the pump pipe, and the upper end side of the lower pump shaft is connected. The part is supported by the intermediate bearing 19. The axial distance L between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b connected by the intermediate shaft joint 32 is set to the fixed side sliding member 23 used for the intermediate bearing 19 or to the rotation arranged to face the same. It is set longer than any of the axial lengths of the side sliding member 25. Moreover, the fixed side sliding member 23 and the rotation side sliding member 25 can be moved to the upper end of the lower pump shaft 9b with the intermediate shaft joint 32 disassembled. The fixed sliding member 23 and the rotating sliding member 25 are removed from the distance L between the upper pump shaft 9a and the lower pump shaft 9b.
[Selection] Figure 2

Description

  The present invention makes it easy to attach and remove the fixed-side sliding member and the rotating-side sliding member of the intermediate bearing that supports the pump shaft in the pump piping in a large vertical pump that an operator puts in the pump piping. This is related to the vertical shaft pump.

  An example of a conventional vertical shaft pump will be described with reference to FIGS. FIG. 7 is an overall configuration diagram of a conventional vertical shaft pump. FIG. 8 is a partially enlarged view of a longitudinal section of the intermediate shaft joint in FIG. FIG. 9 is an external view of the connecting member shown in FIG.

  In FIG. 7 thru | or 9, the suspension pipe 3 of a vertical shaft pump is arrange | positioned and fixed to the opening part 2 of the pump installation floor 1 of the suction water tank 8, and the discharge elbow 4 is arrange | positioned and fixed on the suspension pipe 3. The pumping pipe 5, the pump casing 6 and the suction bell 7 are sequentially connected and suspended under the suspension pipe 3, and the suction bell 7 is submerged under the surface of the suction water tank 8. Further, the pump shaft 9 is divided into an upper pump shaft 9a and a lower pump shaft 9b, and a slight gap is provided between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b so that the intermediate shaft joint 10 It is connected by. The intermediate shaft joint 10 is provided with a connecting member 11 shown in FIG. 9 straddling the lower end portion of the upper pump shaft 9a and the upper end portion of the lower pump shaft 9b, and this connecting member 11 and the upper and lower upper pump shafts 9a. The sleeve 12 is fitted over the lower pump shaft 9b. The sleeve 12 is configured such that relative movement in the rotational direction is restricted by the keys 13 a and 13 b with respect to the upper pump shaft 9 a and the lower pump shaft 9 b, and the rotational power of the upper pump shaft 9 a is transmitted to the lower pump shaft 9. Has been.

  As shown in FIG. 9, the connecting member 11 is formed by connecting members 11 a and 11 b that are divided into two in the circumferential direction at the axial center position on a plane parallel to the axial direction, and flange-shaped portions having a small inner diameter are formed at both ends in the axial direction. The upper pump shaft 9a and the lower pump shaft 9b are fitted in circumferential grooves respectively provided at the lower end portion of the upper pump shaft 9a and the upper end portion of the lower pump shaft 9b. The relative position is regulated. Further, the outer diameter of the connecting member 11 is slightly smaller than the outer diameters of the upper pump shaft 9a and the lower pump shaft 9b, and is formed so that the sleeve 12 can be externally fitted.

  The upper pump shaft 9a passes through the outer wall of the discharge elbow 4 and protrudes upward and its upper end is connected to the output shaft of a reduction gear or a motor (both not shown) via the space shaft joint 14. . A shaft sealing device 16 is provided in the penetrating portion 15 that is discharged from the upper pump shaft 9a and protrudes through the outer wall of the elbow 4, and an upper bearing 17 is provided at a slightly upper position so that the upper portion of the upper pump shaft 9a is Supported. The lower pump shaft 9b is supported by a lower bearing 21 provided in an inner pump casing 20 provided in the pump casing 6 at a slightly upper position with an impeller 18 disposed and fixed at a lower end thereof. . Note that the lower bearing 21 is disposed at a position higher than the minimum operation start water level LWL of the suction water tank 8 in the vertical shaft pump in which the preliminary standby operation is performed. Further, the lower pump shaft 9 b is supported by an intermediate bearing 19 disposed in the pumping pipe 5 at a position slightly below the intermediate shaft joint 10 at the upper end. The intermediate bearing 19 has a fixed sliding member 23 fitted and disposed in a bearing case 22 provided on an intermediate bearing support 24 disposed in the pumping pipe 5, and is opposed to this to the lower pump shaft 9 b on the rotary sliding member. 25 is externally fitted.

  In the vertical shaft pump having such a configuration, periodic inspection is performed for maintenance management, and depending on the wear state of the bearing member, it is necessary to replace the bearing sliding member. In the conventional inspection of the bearing member and parts replacement work, the discharge elbow 4, the suspension pipe 3, the pumping pipe 5, the pump casing 6, the suction bell 7, the upper pump shaft 9a, the lower pump shaft 9b, the blades All the members such as the car 18 are disassembled once, and the bearing sliding members of the upper bearing 17, the intermediate bearing 19 and the lower bearing 21 are removed from the upper pump shaft 9a and the lower pump shaft 9b for inspection, and the bearings worn if necessary. The sliding member was replaced and reassembled. Such work requires a large vertical shaft pump that allows workers to enter the pump piping. The parts are large and heavy, and a crane is required to lift and suspend heavy objects. It took a lot of labor and time for any of the work.

Therefore, in order to solve such a problem, in order to disassemble and assemble a bearing sliding member of a large vertical shaft pump, a discharge elbow, a suspension pipe, a pumping pipe, a pump casing, a suction bell, a pump shaft, an impeller Bearings by disassembling the spacer shaft joint that drives and connects the upper end of the pump shaft protruding through the outer wall of the discharge elbow and the output shaft of the motor without having to disassemble all the members Japanese Patent No. 4066163 proposes a technique that allows the sliding member to be removed or attached from the upper end of the pump shaft.
Opened Japanese Patent No. 4066163

  The technique disclosed in Patent Document 1 does not need to disassemble the pump shaft and the impeller, and requires less labor and time compared to conventional inspection work that requires disassembly of all members. Is an excellent one. However, in order to remove or install the bearing sliding member from the upper end of the pump shaft, there is an intermediate bearing that needs to be replaced in the pump piping such as the discharge elbow or pumping pipe. In addition to removing the joint, it is also necessary to disassemble the shaft seal device of the pump shaft that penetrates the outer wall of the discharge elbow, the upper bearing of the pump shaft, and the like. Further, since the distance from the position where the intermediate bearing of the pump shaft is arranged to the upper end of the pump shaft becomes longer, if there is corrosion or deposits on the outer periphery of the pump shaft during this time, the bearing sliding member is pumped. It becomes difficult to move to the upper end of the shaft, making it difficult to mount and remove the bearing sliding member.

  The present invention has been made in view of the circumstances of the prior art, and is a large vertical pump that an operator can put in the pump pipe. The bearing sliding member of the intermediate bearing in the pump pipe can be easily removed from the pump shaft. An object of the present invention is to provide a vertical shaft pump that can be attached and detached.

  The present invention was made in order to improve the prior art as described above. In the vertical pump of the present invention, the pump shaft is divided into an upper pump shaft and a lower pump shaft, and the upper pump shaft and the lower pump shaft are discharged. In a vertical shaft pump connected by an intermediate shaft joint in the pump pipe upstream of the elbow and supported by an intermediate bearing at the upper end side portion of the lower pump shaft, the lower end of the upper pump shaft connected by the intermediate shaft joint and the The axial distance between the upper ends of the lower pump shafts is set to be longer than either the fixed side sliding member used for the intermediate bearing or the axial length of the rotating side sliding member disposed opposite thereto. Moreover, in a state where the intermediate shaft joint is disassembled, the fixed side sliding member and the rotation side sliding member can be moved to the upper end of the lower pump shaft.

  An inspection port through which an operator can enter and exit is provided on the outer wall of the discharge elbow, and the operator can enter the pump pipe from the inspection port to the position where the intermediate bearing is disposed.

  Furthermore, a lower bearing that supports the lower end side portion of the lower pump shaft may be disposed upstream of the impeller disposed on the lower pump shaft.

  In the vertical shaft pump according to claim 1, the pump shaft is connected to the upper pump shaft and the lower pump shaft by an intermediate shaft joint in the pump pipe, and the lower end of the connected upper pump shaft and the upper end of the lower pump shaft are connected. The axial interval was set longer than either the axial length of the fixed sliding member or rotating sliding member used for the intermediate bearing that supports the upper end portion of the lower pump shaft, and the intermediate shaft joint was disassembled. In the state, the fixed side sliding member and the rotary side sliding member can be moved to the upper end of the lower pump shaft. Therefore, by disassembling the intermediate shaft joint, the fixed side sliding member of the intermediate bearing in the pump pipe And the rotation side sliding member can be easily removed from the lower pump shaft by moving to the upper end of the lower pump shaft. In addition, since the intermediate bearing is disposed slightly below the intermediate shaft joint, the distance from the position where the intermediate bearing is disposed to the upper end of the lower pump shaft is short, and the fixed-side sliding member and the rotary-side sliding It is easy to move the member to the upper end of the lower pump shaft. Therefore, it becomes easy to check the intermediate bearing and replace the parts of the large vertical pump shaft.

  In the vertical pump according to claim 2, an inspection port through which an operator can go in and out is provided on the outer wall of the discharge elbow so that the operator can enter the pump pipe to the position where the intermediate bearing is disposed. Therefore, replacement work or the like can be facilitated by assembling a temporary scaffold for work where the intermediate bearing is disposed. In addition, it is possible to easily carry parts, tools, and the like necessary for replacement work to the position where the intermediate bearing is disposed.

  Further, in the vertical shaft pump according to claim 3, since the lower bearing is disposed upstream of the impeller disposed on the lower pump shaft, the lower bearing is disassembled and the lower end of the lower pump shaft is disassembled. Further, the bearing sliding member can be easily removed or attached.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall configuration diagram of a first embodiment of a vertical shaft pump according to the present invention. FIG. 2 is a partially enlarged view of a longitudinal section of the intermediate shaft joint in FIG. FIG. 3 is an external view of the connecting member shown in FIG. FIG. 4 is a partially enlarged longitudinal sectional view of the lower bearing portion in FIG. 1. 1 to 4, the same or equivalent members as those shown in FIGS. 7 to 9 are assigned the same reference numerals and redundant description is omitted.

  In the vertical pump of the first embodiment shown in FIG. 1, the pump shaft 9 is divided into an upper pump shaft 9a and a lower pump shaft 9b, and the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b are arranged in the pump pipe. The drive coupling by the intermediate shaft coupling 32 is the same as the conventional example shown in FIG. However, the major difference from the conventional example is that the axial length of the intermediate shaft coupling 32 is set to be long, and the axial distance L between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b is The axial length L1 of the fixed-side sliding member 23 or the axial length L2 of the rotating-side sliding member 25 provided opposite thereto is set to be longer. Moreover, in a state where the intermediate shaft joint 32 is disassembled, the fixed side sliding member 23 and the rotation side sliding member 25 of the intermediate bearing 19 are configured to be easily movable to the upper end of the lower pump shaft 9b. The intermediate bearing 19 supports the upper end portion of the lower pump shaft 9b slightly below the intermediate shaft joint 32, and the distance from the position where the intermediate bearing 19 is disposed to the upper end of the lower pump shaft 9b is short. As shown in FIG. 3, the connecting member 30 of the intermediate shaft joint 32 has no structural difference except that the axial length is set to be longer than that of the conventional example. The sleeve 31 is externally fitted across the connecting member 30 and the upper and lower upper pump shafts 9a and 9b in response to the connection member 30 becoming longer in the axial direction. It is set long in the axial direction. An inspection port 33 through which an operator can enter and exit is provided on the outer wall of the discharge elbow 4, and the operator can enter the pump pipe from the inspection port 33 to the position where the intermediate bearing 19 is disposed. ing. Of course, the inspection port 33 is closed with a lid during normal operation of the pump and is opened only when an operator enters the pump pipe.

  Further, in the vertical shaft pump of the first embodiment, the lower bearing 40 that supports the lower end portion of the lower pump shaft 9b is disposed on the upstream side (lower side) of the impeller 18. A lower bearing support 44 is provided on the suction bell 7 at a position upstream (downward) from the impeller 18, and a bearing case storage portion 43 is provided on the lower bearing support 44. The bearing case 41 is inserted into the bearing case housing portion 43 from the lower side (upstream side), and the flange portion of the bearing case 41 is fastened and fixed to the bottom surface of the bearing case housing portion 43 from below with the bolt 46. A fixed sliding member 42 is fitted into the bearing case 41 from above. The rotation-side sliding member 47 is externally fitted to the lower pump shaft 9b from the lower end, and a stopper 48 is fastened and fixed to the lower end surface of the lower pump shaft 9b from below with a bolt 49. The downward movement of the sliding member 47 is restricted. The lower bearing 40 is desirably disposed below the surface of the suction water tank 8 below the minimum operation start water level LWL.

  In the first embodiment having such a configuration, when the intermediate bearing 19 is inspected, the lid of the inspection port 33 is first removed, the worker enters the pump pipe, and a scaffold plate or the like is laid on the intermediate bearing support 24. Temporary work floor. Next, the sleeve 31 of the intermediate shaft joint 32 is moved upward (downstream) to expose the connecting member 30 that connects the upper pump shaft 9a and the lower pump shaft 9b, and a surface parallel to the axial direction. The connecting members 30a and 30b divided into two at the axial center position are removed. Then, the fixed-side sliding member 23 and the rotating-side sliding member 25 of the intermediate bearing 19 are moved upward so that the upper end of the lower pump shaft 9b is at a distance L between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b. Pull out from the outside. Here, the axial distance L between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b is an axial length L1 of the fixed-side sliding member 23 and an axial length L2 of the rotating-side sliding member 25. Since it is set longer than either, it can be easily removed. Further, since the intermediate bearing 19 is disposed slightly below the intermediate shaft coupling 32, the distance from the position where the intermediate bearing 19 is disposed to the upper end of the lower pump shaft 9b is short, and the fixed-side sliding member 23 And it is easy to move the rotation side sliding member 25 to the upper end of the lower pump shaft 9b. Since the inspection port 33 through which the worker can enter and exit is provided on the outer wall of the discharge elbow 4 so that the worker can enter the pump pipe up to the position where the intermediate bearing 19 is disposed, the intermediate bearing 19 is disposed. It is easy to perform replacement work, for example, by building a working scaffold in the place. Further, parts and tools necessary for replacement work and the like can be easily carried to the position where the intermediate bearing 19 is disposed. Accordingly, it is easy to check the intermediate bearing 19 of the large vertical shaft and replace the parts.

  Further, in order to replace the fixed-side sliding member 42 and the rotating-side sliding member 47 of the lower bearing 40, the bolt 46 is removed and the bearing case 41 is removed downward from the bearing case storage portion 43, so that the fixed side The sliding member 42 can be removed. Further, by removing the bolt 49 from the lower end surface of the lower pump shaft 9b and removing the stopper 48 downward from the lower end of the lower pump shaft 9b, the rotation side sliding member 47 can be easily moved downward from the lower end of the lower pump shaft 9b. Can be removed. In this operation, if the lower bearing 40 is provided below the water surface below the minimum operation start water level LWL of the suction water tank 8, the water in the suction water tank 8 is first drained by an underwater pump or the like and the lower bearing 40 is moved to the water surface. It is only necessary to work after the water level of the suction tank 8 has been lowered to the level where the work can be performed. Here, since the lower bearing 40 is always kept in a state of being lubricated with water by providing the lower bearing 40 below the water surface below the minimum operation start water level LWL of the suction water tank 8, it is specially used for air-water operation or the like. Therefore, it is possible to use a highly versatile underwater bearing part. Therefore, when replacement of bearing parts becomes necessary due to damage of the lower bearing 40 or the like, necessary replacement parts can be procured in a short time, and the vertical shaft pump can be restored early.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a partially enlarged longitudinal sectional view of the intermediate shaft joint in the second embodiment of the vertical pump according to the present invention. 5, the same or equivalent members as those shown in FIGS. 1 to 4 and FIGS. 7 to 9 are denoted by the same reference numerals, and redundant description is omitted.

  In the second embodiment shown in FIG. 5, the pump shaft 9 is divided into an upper pump shaft 9a and a lower pump shaft 9b, and the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b are the same as the embodiment shown in FIG. Similarly, although it is drive-coupled by the intermediate shaft joint 63 in the pump pipe, the difference from the first embodiment is the structure of the intermediate shaft joint 63. Note that the axial distance L between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b is the axial length L1 of the stationary-side sliding member 61 of the intermediate bearing 60 or the rotation provided so as to face this. It is the same that it is set longer than any of the axial length L2 of the side sliding member 62. The structure of the intermediate shaft joint 63 is as follows. First, grooves 71 and 72 are respectively provided circumferentially on the lower end side portion of the upper pump shaft 9a and the upper end side portion of the lower pump shaft 9b, and the rings 71 and 72 are divided into two by a plane parallel to the axial direction. 64 and 65 are fitted in each. The inner diameters of the rings 64 and 65 are slightly larger than the outer diameters of the bottoms of the grooves 71 and 72, and the outer diameters of the rings 64 and 65 are set larger than the outer diameters of the upper pump shaft 9a and the lower pump shaft 9b. In addition, a sleeve 66 is fitted over the lower end portion of the upper pump shaft 9a and the upper end portion of the lower pump shaft 9b between the ring 64 fitted into the upper pump shaft 9a and the ring 65 fitted into the lower end side portion. ing. The sleeve 66, the upper pump shaft 9a, and the lower pump shaft 9b are configured such that rotational power is transmitted from the upper pump shaft 9a to the lower pump shaft 9b by keys 13a and 13b. Further, a holding member 67 fitted on the upper pump shaft 9a is fastened and fixed to the upper end surface of the sleeve 66 by a bolt 69 from above, and the ring 64 is nipped and fixed to the sleeve 66 and the holding member 67 to increase the diameter. Movement in a certain direction is restricted. Further, a holding member 68 fitted on the lower pump shaft 9b is fastened and fixed to the lower end surface of the sleeve 66 from below by a bolt 70, and the ring 65 is nipped and fixed to the sleeve 66 and the holding member 68 to increase the diameter. Movement in a certain direction is restricted.

  In order to remove the stationary sliding member 61 and the rotating sliding member 62 of the intermediate bearing 60 from the lower pump shaft 9b, the intermediate shaft joint 63 is disassembled and removed. First, the bolt 69 is removed, the holding member 67 is shifted upward, the ring 64 is divided and removed from the upper pump shaft 9a. Further, the bolt 70 is removed and the retaining member 67 is shifted downward to divide the ring 65 and remove it from the lower pump shaft 9b. Further, the sleeve 66 is moved upward and the pressing member 68 is also moved upward. The pressing member 68 is removed from the axial distance L between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b. Then, the fixed-side sliding member 61 and the rotating-side sliding member 62 are moved to the upper end of the lower pump shaft 9b and removed from the axial interval L between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b.

  Furthermore, a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a partially enlarged longitudinal cross-sectional view of the intermediate shaft coupling portion in the third embodiment of the vertical shaft pump of the present invention. 6, the same or equivalent members as those shown in FIG. 1 to FIG. 5 and FIG. 7 to FIG.

  In the third embodiment shown in FIG. 6, the pump shaft 9 is divided into an upper pump shaft 9 a and a lower pump shaft 9 b, and the lower end of the upper pump shaft 9 a and the upper end of the lower pump shaft 9 b are connected by the connection pipe 80. Drive connected in the pump piping. Note that the axial distance L between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b is the axial length L1 of the stationary sliding member 90 of the intermediate bearing 92 or the rotation provided so as to be opposed thereto. It is the same that the side sliding member 91 is set longer than any of the axial length L2. The structure for connecting the connecting pipe 80 is as follows. First, a flange-like portion is formed at the lower end portion of the upper pump shaft 9 a and is fastened and fixed to the flange-like portion 81 formed at the upper end portion of the connection pipe 80 with a bolt 82. Further, a connecting flange 84 is assembled to the upper end portion of the lower pump shaft 9b, and is fastened and fixed to the flange-shaped portion 83 formed at the lower end portion of the connecting pipe 80 with a bolt 85. The connecting flange 84 assembled to the upper end portion of the lower pump shaft 9b has the following structure. A groove 88 is provided in a circumferential shape in the upper end side portion of the lower pump shaft 9b, and a ring 89 divided into two by a plane parallel to the axial direction is fitted into the groove 88. The inner diameter of the ring 89 is slightly larger than the outer diameter of the bottom of the groove 88, and the outer diameter of the ring 89 is set larger than the outer diameter of the lower pump shaft 9b. A retaining member 87 is fitted on the lower pump shaft 9 b below the ring 89, and a locking member 86 is disposed above the ring 89. The ring 89 is nipped and fixed by the retaining member 87 and the locking member 86. In addition, a flange portion 83 provided on the lower end surface of the connection pipe 80 and a connecting flange 84 including a locking member 86 and a holding member 87 are fastened together by bolts 85. Further, the holding member 87 fitted on the lower pump shaft 9b is configured such that rotational power is transmitted from the holding member 87 to the lower pump shaft 9b by the key 13b with respect to the lower pump shaft 9b.

  In order to remove the stationary sliding member 90 and the rotating sliding member 91 of the intermediate bearing 92 from the lower pump shaft 9b, the connecting pipe 80 is removed. First, the bolt 82 is removed, and the upper pump shaft 9a and the connection pipe 80 are separated. Next, the bolt 85 is removed to separate the lower pump shaft 9b and the connecting pipe 80, and the connecting pipe 80 is removed from between the upper pump shaft 9a and the lower pump shaft 9b. Then, the retaining member 87 is shifted downward to divide the ring 89 and remove it from the lower pump shaft 9b. Further, the locking member 86 and the pressing member 87 are shifted upward, and the locking member 86 and the pressing member 87 are removed from the axial distance L between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b. Then, the fixed-side sliding member 90 and the rotating-side sliding member 91 are moved to the upper end of the lower pump shaft 9b and removed from the axial interval L between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b.

  In the vertical pump of the present invention, the axial distance L between the lower end of the upper pump shaft 9a and the upper end of the lower pump shaft 9b is the axial length of the fixed-side sliding members 23, 42, 61, 90. A member that is set longer than any of L1 and the axial length L2 of the rotation side sliding members 25, 47, 62, 91, and that allows the lower end portion of the upper pump shaft 9a and the upper end portion of the lower pump shaft 9b to be removed. The intermediate shaft couplings 32 and 63 as in the first and second embodiments and the structure using the connecting pipe 80 as in the third embodiment are not limited.

1 is an overall configuration diagram of a first embodiment of a vertical shaft pump according to the present invention. It is a longitudinal cross-section partial enlarged view of the part of the intermediate shaft coupling in FIG. It is an external view of the connection member shown in FIG. It is a longitudinal cross-section partial enlarged view of the part of the lower bearing in FIG. It is a longitudinal cross-section part enlarged view of the part of the intermediate shaft coupling in 2nd Example of the vertical shaft pump of this invention. It is a longitudinal cross-section part enlarged view of the part of the intermediate shaft coupling in 3rd Example of the vertical shaft pump of this invention. It is a whole block diagram of the conventional vertical shaft pump. It is a longitudinal cross-section partial enlarged view of the part of the intermediate shaft coupling in FIG. It is an external view of the connection member shown in FIG.

DESCRIPTION OF SYMBOLS 1 Pump installation floor 2 Opening part 3 Hanging pipe 4 Discharge elbow 5 Pumping pipe 6 Pump casing 7 Suction bell 8 Suction water tank 9 Pump shaft 9a Upper pump shaft 9b Lower pump shaft 10, 32, 63 Intermediate shaft couplings 11, 11a, 11b, 30, 30a, 30b Connecting member 12, 31, 66 Sleeve 13a, 13b Key 14 Space shaft joint 15 Through portion 16 Shaft seal device 17 Upper bearing 18 Impeller 19, 60, 92 Intermediate bearing 20 Inner pump casing 21, 40 Lower bearing 22 Bearing case 23, 42, 61, 90 Fixed sliding member 24 Intermediate bearing support 25, 47, 62, 91 Rotating sliding member 33 Inspection port 41 Bearing case 43 Bearing case storage portion 44 Lower bearing support 48 Stopper 46, 49, 69, 70, 82, 85 Bolt 64, 65, 89 Ring 67 68,87 pressing member 71,72,88 groove 80 connecting pipe 81, 83 flange-shaped section 84 connecting flange 86 the locking member

Claims (3)

The pump shaft is divided into an upper pump shaft and a lower pump shaft, the upper pump shaft and the lower pump shaft are discharged and connected by an intermediate shaft joint in the pump pipe upstream of the elbow, and an upper end side portion of the lower pump shaft In the vertical pump supported by the intermediate bearing, the axial interval between the lower end of the upper pump shaft and the upper end of the lower pump shaft connected by the intermediate shaft joint is fixed to the fixed sliding member used for the intermediate bearing or to this. In a state where the axial side length of the rotation side sliding member disposed opposite to each other is set longer than that of the rotation side sliding member and the intermediate shaft joint is disassembled, the fixed side sliding member and the rotation side sliding member are A vertical shaft pump configured to be movable to the upper end of the lower pump shaft. 2. The vertical shaft pump according to claim 1, wherein an inspection hole through which an operator can enter and exit is provided in an outer wall of the discharge elbow, and the operator enters the pump pipe from the inspection hole to a position where the intermediate bearing is disposed. A vertical shaft pump characterized by comprising The vertical shaft pump according to claim 1 or 2, wherein a lower bearing for supporting a lower end side portion of the lower pump shaft is disposed upstream of an impeller disposed on the lower pump shaft. The vertical shaft pump features.