JP5442791B2 - Guide vane bush extractor - Google Patents

Description

  The present invention relates to a guide vane bushing extraction device for extracting a guide vane bushing from a main body that is cylindrical and has a plurality of lubricant insertion holes formed in an outer peripheral wall thereof and that is press-fitted into the main body of the waterwheel to support a guide vane shaft of the watermill. .

  First, the guide vane bush will be described with reference to FIGS. 9 and 10. FIG. 9 is a partial cross-sectional perspective view showing the configuration of a conventional water wheel 110. FIG. 10 is a longitudinal sectional view showing the vicinity of the guide vane 120 of the water wheel 110 of FIG. As shown in FIG. 9, conventionally, the water turbine 110 is gradually fed to the center while turning by passing water from the upper pond or the like to the spiral casing 111, passing through the stay vane 130 and the guide vane 120, and the runner. It flows into 140. Then, a rotational force is generated by the runner vane 150 of the runner 140, whereby the runner 140 rotates and a rotating shaft of a generator (not shown) connected to the main shaft 110a rotates to generate electric power (see, for example, Patent Document 1). .)

  As shown in FIG. 10, the guide vane 120 is supported by a support shaft 121. The upper end side and the lower end side of the support shaft 121 are bushes 2a attached to the upper cover 1a and the lower cover 1b of the water turbine cover 1, respectively. 2b. These bushes 2a and 2b are generally mounted directly on the upper cover 1a and the lower cover 1b, and are usually formed integrally into a cylindrical shape by casting or the like, and fixed in place by cold fitting. Yes.

  Such a bush 2 may be removed from the water turbine cover 1 in order to perform operations such as inspection and replacement during periodic inspection. At this time, there is a structure in which the water wheel cover (particularly the lower cover 1b) is embedded and cannot be disassembled. In such a structure, the inspection is performed by directly extracting the water wheel using a bush extraction device or the like.

  In this case, a bush extraction device (for example, refer to Patent Document 2) that extracts using a screw hole (fixing hole) screwed into the bush itself is known. This device includes a fixing member installed on a watermill cover in which a bush is fitted, and an elevating member fixed to the fixing member and elevating and lowering, and the elevating member and a fixing hole of the bush are connected by a bolt or the like. Thus, the bush is extracted from the cover as the elevating member moves up and down. That is, since the fixing holes that are pre-threaded in the bushes are extracted, the extracted bushes can be used again after inspection.

  On the other hand, a device (for example, see Patent Document 3) in which a new screw hole (fixing hole) is formed in the bush itself and is extracted is known. In this device, a support leg and a seat plate are installed on a pipe into which a bush is inserted, and a tap is disposed at one end of a screw shaft that is screwed to the seat plate. After fitting with a hole, the screw shaft is pulled up by screwing with the seat plate, and the bush is removed from the pipe. That is, without using the bush again, the bush can be removed from the pipe in a short time by opening the fixing hole with a tap and quickly attaching the screw shaft to the bush.

  As described above, in the conventional bush extraction device, the bush is appropriately extracted by using various extraction devices at the time of periodic inspection such as inspection and replacement, depending on whether the bush is reused or replaced.

JP 2006-138251 A Japanese Patent Laid-Open No. 06-126647 Registered Utility Model No. 3016627

  However, in the conventional bush extraction device (Patent Document 2), some bushes do not have a fixing hole for fixing in advance, and only the bush having the fixing hole can be extracted. In particular, the bush for vertical axis water turbine guide vanes, etc., may be press-fitted into the water turbine cover by cold fitting or the like (fitted with the bush cooled and contracted by dry ice) and may not have a fixing hole. In such a case, there was a problem that it could not be extracted.

  Further, in the conventional bush extraction device (Patent Document 3), it is necessary to cut and fit the screw hole with the tap to the bush, and the bush is damaged, so that it cannot be reused (the bush needs to be replaced, There was a problem that wasted cost).

  Further, in the conventional bush extraction device, it is necessary to select a device for extracting the bush depending on the situation, so that the operation is not constant and complicated by the selected device, and there is a problem that the work efficiency is poor.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a guide vane bush extraction device that can be extracted reusably without damaging the bush, and can be easily extracted to a certain size without a fixing hole.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a guide vane which is cylindrical and has a plurality of lubricant insertion holes formed in the outer peripheral wall thereof and is press-fitted into the main body of the water turbine to support the guide vane shaft of the water turbine. A guide vane bush extraction device for extracting a bush from the main body, wherein a projecting claw is engaged with the lubricant insertion hole, and is disposed in the guide vane bush. The front-end | tip part is provided with the connection member connected with the said arrangement | positioning member, and the extraction means which pulls out the said connection member in the state which the said arrangement | positioning member and the connection member connected.

  According to this invention, the disposing member is disposed by engaging the convex claw with the lubricant insertion hole in the guide vane bush press-fitted into the main body of the water turbine, and the disposing member extends in a rod shape. The connecting member is connected to the tip of the connecting member, and is provided with a pulling means that is attached to the other end of the connecting member and pulls the connecting member, and the pulling means pulls the connecting member to connect to the connecting member. The guide vane bush can be easily removed from the turbine body together with the members.

  According to a second aspect of the present invention, in the guide vane bush extraction device according to the first aspect, the disposing member having an arc shape, the claw is provided on the outer peripheral surface, and the first thread is formed on the inner peripheral surface. There are a plurality of threads, and a second screw thread is formed at the tip of the connecting member, and the first screw thread and the second screw thread are screwed together to connect the disposing member and the connecting member. It is characterized by.

  According to this invention, the arrangement member and the connection member can be easily connected by screwing the first screw thread of the arrangement member and the second thread of the connection member, and the guide vane bush extraction device Can be installed easily.

  According to the first aspect of the present invention, the claw of the arrangement member is engaged with and extracted from the lubricant insertion hole in the bush. Therefore, even if the bush itself does not have a fixing hole, a new screw hole is not opened. It can be removed without damaging the bush. As a result, it is not necessary to replace the entire bush after the inspection, so that it can be reused. Moreover, since it is a simple attachment structure that engages the claws of the arrangement member, the operator can easily perform the extraction work even in the work at the site, and the workability is improved. As a result, work efficiency such as inspection and replacement during periodic inspection can be improved, and work time during inspection can be shortened. Furthermore, since the size of the disposing member and the connecting member can be freely set with a simple structure, and it is possible to cope with a certain size change of the bush (diameter change in the bush), it can be easily extracted in the same operation procedure. As a result, versatility increases with respect to the sizes of various bushes, and there is no variation in work by the operator, and a constant work quality can be maintained.

  According to the second aspect of the present invention, the first screw thread of the disposing member and the second screw thread of the connecting member are screwed together to easily connect the disposing member and the connecting member. Therefore, it is possible to easily install the guide vane bush extraction device and to expect a significant reduction in work time.

It is an external appearance perspective view which shows the guide vane bush extraction apparatus which concerns on this invention. It is a figure which shows the operation | movement which attaches the guide vane bush extraction apparatus of FIG. 1, (a) shows attachment of an installation member, (b) shows attachment of a connection member, (c) shows attachment of a drawing member. Yes. It is a figure which shows the state after the attachment of the guide vane bush extraction apparatus of FIG. 1, (a) shows the side cross section of an attachment state, (b) has each shown the AA cross section of (a). It is a perspective view which shows other embodiment of the guide vane bush extraction apparatus of FIG. It is a figure which shows the operation | movement which attaches a connection member to the arrangement | positioning member of FIG. 4, (a) has shown the state in the middle of attachment, (b) has each shown the state after attachment. It is a perspective view which shows other embodiment of the arrangement | positioning member of FIG. It is a perspective view which shows other embodiment of the arrangement | positioning member of FIG. It is an external appearance perspective view which shows other embodiment of the connection member and extraction member of FIG. It is a fragmentary sectional perspective view which shows the structure of the conventional water wheel. It is the longitudinal cross-sectional view which showed the guide vane vicinity of the water turbine of FIG.

  The present invention will be described below based on the illustrated embodiments.

(Embodiment 1)
FIG. 1 is an external perspective view showing a guide vane bush extraction device 3 according to the present invention. The water turbine cover 1 and the bush 2 in FIG. 1 are the same components as those of the prior art in FIG. 10, and the same components are denoted by the same reference numerals. As shown in FIG. 1, this guide vane bush extraction device 3 is installed to extract a bush 2 of a guide vane such as a water turbine guide vane attached to a water turbine cover 1 which is a main body of the water turbine by cold fitting or the like. , The disposing member 10, the connecting member 20, and the drawing member 30. In other words, the present embodiment assumes a case where the bush 2 is cold-fitted to the water turbine cover 1 and no fixing hole is opened in the flange portion 2b. Further, in the present embodiment, the turbine cover 1 is not disassembled with the lower cover 1b shown in FIG. 10, for example, being buried (directly on site), regardless of whether or not the disassembly is performed. The purpose is to remove the bush 2 depending on the situation.

  Such a guide vane bush extraction device 3 according to the present embodiment is configured to extract the bush 2 chilled and fitted to the water turbine cover 1 according to the situation at the time of inspection, and is arranged in the bush 2 shown in FIG. The disposing member 10 is provided, a connecting member 20 connected to the disposing member 10, and a pulling member 30 which is a pulling means for pulling up (pulling out) the connecting member 20.

  The disposing member 10 extends along the inner periphery of the cylindrical bearing portion 2a of the bush 2 and is divided into a plurality of parts (in three equal parts in FIG. 1), and each arc plate 11 is spaced apart at equal intervals and extends in an arc shape. And a claw 12 projecting in a convex shape substantially at the center of the outer peripheral surface of the arc plate 11 and a first screw thread 13 having a screw formed on the inner peripheral surface of the arc plate 11. The claw 12 is formed so that it protrudes from the center of the circular arc plate 11 in a rod shape and the tip becomes narrow and conical toward the tip, so that it can be easily inserted into the lubricant insertion hole 2c of the bush 2. . The arc plate 11 can be adjusted in position by widening or narrowing the distance between the bushes 2 by using a segmented (split) type divided within the cylindrical bearing portion 2a of the bush 2. It has become. Further, when the circular arc plate 11 is arranged on the inner peripheral surface of the cylindrical bearing portion 2a of the bush 2, the first thread 13 formed on the inner peripheral surface on the inner side is a taper that narrows downward at a predetermined angle. It is a (diagonal) screw. This is because a second thread 21 of the connecting member 20 to be described later is a taper screw, so that when they are screwed together, they spread outward in the bush 2 and are firmly fixed (see FIG. 3). is there. That is, the circular arc plate 11 is spread outward by this taper screw so that it can cope with various inner diameter sizes in the cylindrical bearing portion 2a.

  The connecting member 20 is formed in a rod shape, a second screw thread 21 that is connected to the disposing member 10 at the rod-shaped tip portion, and a third screw thread 22 that is connected to a pull-out member 30 described later on the other end side. , Are formed. The second thread 21 is a taper (oblique) screw that narrows the rod-shaped tip at a predetermined angle in order to be screwed into the arc plate 11 described above. In other words, the second thread 21 (tapered screw) is screwed into (threaded into) the first thread 13 of the arc plate 11 so that the arc plate 11 is expanded outwardly in the bush 2 and firmly fixed. (See FIG. 3). Further, the third thread 22 is for connecting to the pulling member 30 in order to pull up the pulling member 20 in the state where the disposing member 10 and the connecting member 20 are connected.

  The pull-out member 30 includes a fixing base 31 that raises the connecting member 20 to a predetermined height, a hydraulic jack 32 that is placed on the fixing base 31, and a nut 33 that fixes the connecting member 20 to the hydraulic jack 32. It is configured.

  The fixed base 31 includes a support leg 31a extending vertically in parallel to both sides of the bush 2 inserted into the water turbine cover 1, and a top surface 31b formed in a U shape by connecting the upper ends of the support legs 31a. Are provided as a unit. The support leg 31a is set at a certain height so that the flange 2b of the bush 2 does not come into contact with the bush 2 when the bush 2 is pulled out from the turbine cover 1. Further, an insertion hole 31c is opened on the top surface 31b so that the connecting member 20 is inserted and pulled out.

  The hydraulic jack 32 is a center hole jack that can generate a large extension force that is generally used in power facilities. The hydraulic jack 32 is formed in a cylindrical shape, and a hollow insertion hole 32a is opened at the center. A rod-like member inserted through the insertion hole 32a is vertically expanded and lowered by an oil pressure in the axial direction. Can do.

  The nut 33 is screwed into the upper end (third screw thread 22) of the connecting member 20 that is inserted into the insertion hole 32a of the hydraulic jack 32 and protrudes, and the connecting member 20 is fixed (fixed) at the upper end of the hydraulic jack 32. The position can be adjusted.

  Next, the operation | movement using the guide vane bush extraction apparatus 3 of such a structure is demonstrated in detail with reference to FIGS. FIGS. 2A and 2B are views showing the operation of attaching the guide vane bushing extraction device 3 of FIG. 1. FIG. 2A shows the installation of the arrangement member 10, FIG. 2B shows the installation of the connecting member 20, and FIG. Each attachment of the member 30 is shown. 3 is a view showing a state after the guide vane bushing extraction device 3 of FIG. 1 is attached, (a) is a side cross-section of the attached state, and (b) is an AA shown in (a). Each cross section is shown. First, as shown in FIG. 2 (a), the segment-type disposing members 10 divided into a plurality of parts are sequentially disposed in the cylindrical bearing portion 2 a of the bush 2. At this time, the claw 12 of the disposing member 10 is inserted so as to fit into the lubricant insertion hole 2 c of the bush 2. Thereby, the disposing member 10 is attached using the lubricating oil filling hole 2c of the bush 2, and as shown in FIG. 2 (b), a tapered taper screw with a first thread 13 that narrows downward from above is provided. Is disposed.

  When the taper screw by the first thread 13 of the disposing member 10 is disposed in this way, as shown in FIG. 2B, the connecting member 20 is inserted into the cylindrical bearing portion 2a of the bush 2 from above. The second thread 21 side is inserted, and the first thread 13 and the second thread 21 are screwed together. At this time, the second screw 21 is screwed into the first screw 13 which is a taper screw, so that the arrangement member 11 divided into three equal parts shown in FIG. Within the part 2a, it spreads outward and is strongly pressed and fixed. Thereby, the arrangement member 10 and the connecting member 20 are attached to the bush 2 inserted into the water turbine cover 1 as shown in FIG. 2C, and the bush 2 is removed by attaching the extraction member 30. It becomes possible.

  As illustrated in FIG. 2C, the extraction member 30 is fixed to the connecting member 20 by first installing the fixing base 31 and the hydraulic jack 32 and then fastening the nut 33. Here, the fixing base 31 is lowered from above the connecting member 20 so as to be inserted into the insertion hole 31 c, and is installed so that the support leg 31 a is positioned on the turbine cover 1 across the flange 2 b of the bush 2. Thereafter, the insertion hole 32 a of the hydraulic jack 32 is inserted from above the connecting member 20 and placed on the fixing base 31, similarly to the fixing base 31. At this time, the fixing base 31 and the hydraulic jack 32 are adjusted and installed so that the connecting member 20 is positioned approximately at the center of the insertion holes 31c and 32a so that the connecting member 20 does not contact (see FIG. 3A). )

  Finally, the nut 33 is fastened to the third thread 22 of the connecting member 20 that protrudes to the upper end through the insertion holes 31c and 32a between the fixing base 31 and the hydraulic jack 32, so that FIG. As shown in FIG. 5, all the members are mounted, and the mounting operation is completed.

  Next, when the guide vane bush extraction device 3 is mounted on the water turbine cover 1 and the bush 2 in this way, an operation of extracting the bush 2 press-fitted into the water turbine cover 1 is executed. First, from the state in which the guide vane bush extraction device 3 shown in FIG. 3A is mounted, the bush 2 is gradually extracted (pushed up) from the water turbine cover 1 using the hydraulic jack 32. At this time, the hydraulic jack 32 generates a large extension force due to the hydraulic pressure, and presses it so as to widen the gap between the fixing base 31 and the nut 33 shown in FIG. With the extension force of the hydraulic jack 32, the fixed base 31 side presses the water turbine cover 1 downward, and the connecting member 20 screwed on the other nut 33 side presses upward, together with the arrangement member 10. Ascending, the bush 2 is pushed up in the direction of pulling upward.

  As a result, the bush 2 press-fitted into the water turbine cover 1 is extracted from the water turbine cover 1 and repaired or exchanged at a regular inspection and is press-fitted into the water turbine cover 1 (cold fitting). Here, as shown in FIG. 3B, the bush 2 can be pulled out without scratching other surrounding parts by engaging the claw 12 of the arrangement member 10 with the lubricant insertion hole 2c. After the inspection, it can be reused when no replacement is required.

  As described above, according to the guide vane bush extraction device 3, the bush 2 itself does not have a fixing hole because the claw 12 of the arrangement member 10 is engaged and extracted with the lubricant insertion hole 2 c in the bush 2. Even in this case, it is possible to remove the bush 2 without damaging the bush 2 without newly opening a screw hole. As a result, it is not necessary to replace the entire bush 2 after the inspection, so that it can be reused. Moreover, since it is a simple attachment structure which engages the claw 12 of the arrangement member 10, the operator can easily perform the extraction work even in the work on the site, and the workability is improved. As a result, work efficiency such as inspection and replacement at the regular inspection can be improved, and work time can be shortened. Furthermore, the size of the disposing member 10 and the connecting member 20 can be freely set with a simple structure, and it is possible to cope with a certain size change of the bush 2 (diameter change in the bush 2). Can be extracted. As a result, versatility increases with respect to the sizes of the various bushes 2, and there is no variation in work by the operator, and a constant work quality can be maintained.

  Further, according to the guide vane bushing extraction device 3, the first screw thread 13 of the disposing member 10 and the second screw thread 21 of the connecting member 20 are screwed together to connect to the disposing member 10. Since the member 20 can be easily connected, the guide vane bush extraction device 3 can be easily installed, and a significant reduction in work time can be expected.

(Embodiment 2)
Next, another embodiment of the guide vane bush extraction device will be described in detail with reference to FIGS. FIG. 4 is a perspective view showing another embodiment of the guide vane bush extraction device 3 of FIG. FIGS. 5A and 5B are views showing an operation of attaching the connecting member 50 to the arrangement member 40 of FIG. 4. FIG. 5A shows a state during attachment, and FIG. 5B shows a state after attachment. Here, the components other than the disposing member 40 and the connecting member 50 in FIG. 4 are the same as those in the guide vane bush extraction device 3 in FIG. To do. As shown in FIG. 4, the guide vane bush extraction device 4 includes an arrangement member 40, a connecting member 50, and a extraction member 30, as in the first embodiment, and includes a fixed base 31 as the extraction member 30, a hydraulic pressure A jack 32 and a nut 33 are provided.

  The disposing member 40 extends along the inner circumference of the bush 2 and is divided into a plurality of parts (in three equal parts in FIG. 4), and a plurality of arc plates 41 that are spaced apart at equal intervals and extend in an arc shape, and the arc plates And a claw 42 projecting in a convex shape substantially at the center of the outer peripheral surface of 41. Unlike the embodiment of FIG. 1, the arrangement member 40 is not formed with a tapered screw (first thread) that is inclined on the inner peripheral surface of the arc plate 41. That is, in the connection between the disposing member 40 and the connecting member 50, the connection can be made without using a screw thread structure. The circular arc plate 41 is disposed in the bush 2 and is formed in accordance with the outer dimension of the connecting member 50 so that the rod-like connecting member 50 described later can be inserted to be fixed between the bush 2 and the connecting member 50. Has been.

  On the other hand, the connecting member 50 is formed in a rod shape, and a plurality of protrusions 51 that can be inserted into the spaced gaps of the disposing member 40 are connected to the rod-shaped tip portion, and the net 33 of the drawing member 30 is connected to the other end side. Third thread 52 to be formed is formed. A plurality of protrusions 51 project on the outer periphery of the lower end of the connecting member 50, and a plurality of protrusions 51 are arranged in accordance with the position where the arc plate 41 is divided (spaced space positions). That is, in FIG. 4, the disposing member 40 is divided into three equal parts on the inner periphery of the bush 2, so that 60 ° is provided on the outer periphery of the lower end of the connecting member 50 in accordance with the three gaps between the circular arc plates 41. Three protrusions 51 are formed at intervals.

  When connecting the connecting member 50 to the arrangement member 40 formed in this way, first, the arrangement member 40 shown in FIG. 4 is arranged in the bush 2. Thereafter, the protrusions 51 of the connecting member 50 are aligned so as to be positioned in the gaps between the plurality of arrangement members 40, and the protrusions 51 are positioned below the arrangement members 40 as shown in FIG. Insert until you do. Then, after the protruding portions 51 are positioned below the arrangement member 40, the connecting member 50 is rotated so that the lower ends of the plurality of arrangement members 40 are caused by the protrusion portions 51 as shown in FIG. Each supported. Here, in the case of FIG. 5, since the protrusions 51 are arranged at intervals of 60 °, the connecting member 50 can support the substantially center of the lower end of the arrangement member 40 by rotating 30 °. it can. Thereby, the arrangement | positioning member 40 and the connection member 50 are connected, and the bush 2 can be extracted by connecting the connection member 50 to the extraction member 30.

  As described above, according to the guide vane bush extraction device 4, the arrangement member 40 and the connection member 50 can be easily connected to extract the bush 2, so that the effect is obtained as in the first embodiment. In addition, since the connecting member 50 can be connected by simply inserting the connecting member 50 into the arrangement member 40 and rotating it, the guide vane bushing extraction device 4 can be attached more easily and quickly than the screw connection. Will improve.

(Embodiment 3)
Next, with reference to FIGS. 6 and 7, another embodiment of the disposing members 10 and 40 shown in FIGS. 1 and 4 will be described in detail. FIG. 6 is a perspective view showing another embodiment of the disposing member 10 of FIG. 1, and FIG. 7 is a perspective view showing another embodiment of the disposing member 40 of FIG. As shown in FIG. 6, the disposing member 60 according to this other embodiment is divided into a plurality of disposing members 10 shown in FIG. The circular arc plate 62 provided and divided is integrally accommodated and provided so as to be easily mounted in the bush 2.

  The disposing member 60 includes a main body 61 extending vertically and vertically in a cylindrical shape. The upper end of the disposing member 60 is closed by an upper surface 61a, and a screw hole 61b and a slide hole 61c for projecting the upper end of the arc plate 62 from the center of the upper surface 61a. Are opened. The disposing member 60 includes a pair of arc plates 62 accommodated in the cylindrical shape of the main body 61. The arc plate 62 has an upper end protruding from the inside of the main body 61 through the slide hole 61c, and is provided with a claw 62a on the outer surface so as to penetrate and protrude through the side surface of the main body 61. Further, the pair of arc plates 62 is urged so as to be pressed outward by a spring 63 within the main body 61. That is, the arrangement member 60 is in a state where the claw 62a protrudes from the side surface of the main body 61 in a normal state, and by sliding the pair of arcuate plates 62 in the direction opposite to the bias of the spring 63, The claw 62a is retracted. Further, the disposing member 60 is formed so that the second thread 21 of the connecting member 20 shown in FIG. 1 can be screwed into the screw hole 61b.

  When the arrangement member 60 having such a configuration is attached to the bush 2, first, the connecting member 20 shown in FIG. 1 is screwed into the screw hole 61 b of FIG. 6 and fixed. Thereby, when an operator inserts in the bush 2, it becomes possible to work by grasping the connecting member 20. Then, the operator holds the connecting member 20 and slides the tabs 62a in the state in which the upper ends of the pair of arcuate plates 62 in FIG. The installation member 60 is inserted into the bush 2. Thereafter, the arc plate 62 is gradually released at a predetermined position in the bush 2 to project the claw 62a, thereby being inserted into the lubricant insertion hole 2c in the bush 2 and engaged. As a result, the disposing member 60 is fixed in the bush 2, and thereafter, the connecting member 20 is attached to the pulling member 30 in the same manner as the guide vane bush pulling device 3 of FIG.

  On the other hand, in the case of a structure in which a plurality of protrusions 51 are provided at the tip as in the connecting member 50 of FIG. 4, as shown in FIG. 7, an opening hole 71b is provided at the center of the upper surface 71a of the main body 71 instead of a screw hole. . The opening hole 71b is provided with a notch 71b-1 at a position equally divided into three on the inner periphery so that the protrusion 51 can be inserted. Thus, similarly to the operation shown in FIG. 5, the protrusion 51 of the connecting member 50 is inserted in accordance with the notch 71 b-1 of the opening hole 71 b of the main body 71, and rotated, thereby rotating the arrangement member 70 and the connecting member. 50 can be connected. Thereafter, similarly to the arrangement member 60 described above, the claw 72 a of the arc plate 72 is retracted and mounted in the bush 2, whereby the bush 2 can be removed.

  As described above, according to the disposing members 60 and 70, since they are mounted in the bush 2 and the bush 2 can be removed, the same effects as those of the disposing members 10 and 40 shown in FIGS. Can be obtained. Moreover, according to the arrangement | positioning members 60 and 70, compared with what each installs the circular arc plates 11 and 41 like the arrangement | positioning members 10 and 40 shown in FIG. Since the circular arc plates 62 and 72 are integrated, it is easy to attach and detach the bush 2 and the attaching and detaching work can be executed in a short time.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above-described embodiment, the connection members 20 and 50 are described as being pulled up by the hydraulic jack 32 that is a center hole jack. However, the present invention is not limited to this, and as shown in FIG. The connecting member 80 provided and the pulling member 90 provided with the pinion 91 structure may be used. FIG. 8 is an external perspective view showing another embodiment of the connecting member and the drawing member of FIG. As shown in FIG. 8, the pulling member 90 is detachable from the upper end of the rack 81 of the connecting member 80. After the pulling member 90 is mounted on the rack 81, the drive shaft 100 is driven either automatically by a motor or manually. By applying a force, the driving force is transmitted from the pinion 91 to the rack 81. As described above, even when the structure of the rack 81 and the pinion 91 is used, the connecting member 80 can be moved up and down to perform the extraction operation of the bush 2.

1 Waterwheel cover (main body of watermill)
DESCRIPTION OF SYMBOLS 2 Bush 2a Cylindrical bearing part 2b Flange part 2c Lubricant insertion hole 3 Guide vane bush extraction apparatus 10 Arrangement member 11 Arc board 12 Nail | claw 13 1st thread 20 Connection member 21 2nd thread 22 3rd thread 30 Extraction member (extraction means)
31 Fixing base 31a Support leg 31b Top surface 31c Insertion hole 32 Hydraulic jack 32a Insertion hole 33 Nut

Claims (2)

A guide vane bush extraction device for extracting a guide vane bushing from the main body, which is cylindrical and has a plurality of lubricant insertion holes formed in the outer peripheral wall and is press-fitted into the main body of the water turbine to support the guide vane shaft of the water turbine. And
A disposing member disposed in the guide vane bush with a convex claw engaged with the lubricant insertion hole;
A connecting member that is rod-shaped and has a tip connected to the arrangement member;
In a state where the arrangement member and the connecting member are connected, a drawing means for pulling out the connecting member;
A guide vane bush extraction device comprising: A plurality of the disposing members each having an arc shape, the claw is provided on the outer peripheral surface, and the first thread is formed on the inner peripheral surface;
A second thread is formed at the tip of the connecting member,
The guide vane bush extraction device according to claim 1, wherein the disposing member and the connecting member are connected by screwing the first screw thread and the second screw thread.

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