JP2020133470A - Method for vertically inverting cabin half body, and rotary shaft bracket and inversion frame used for the same - Google Patents

Abstract

To provide a method for vertically inverting a cabin half body, capable of executing vertical inversion of a cabin half body easily at low cost while minimizing a use time of a ceiling crane.SOLUTION: Rotary shaft brackets 20A and 20B having a rotational shaft 21 are arranged on one side and the other side of a cabin upper half 1 in a turbine axial direction. Then, the rotary shaft brackets 20A and 20B are attached to the cabin upper half 1 so that the rotational shaft 21 on the one side and the rotational shaft 21 on the other side are coaxial and parallel to the turbine axial direction. Then, as the rotational shaft 21 is rotated about the central axis of the rotational shaft 21, the cabin upper half 1 is vertically inverted.SELECTED DRAWING: Figure 1

Description

An embodiment of the present invention relates to an upside-down method for a vehicle interior half body, a rotating shaft bracket and an inversion stand used therein.

A steam turbine is an external combustion engine that causes a steam flow accelerated by a nozzle (static blade) to flow into a moving blade and converts the energy of the steam into rotational energy of a turbine rotor by the moving blade. The steam turbine houses the nozzle and rotor blades in a container called a passenger compartment. The passenger compartment is generally composed of an internal passenger compartment that houses a nozzle, rotor blades, and a turbine rotor that holds the rotor blades, and an external passenger compartment that is provided outside the internal passenger compartment and accommodates the internal passenger compartment. .. Further, the internal passenger compartment and the external passenger compartment are generally divided into an upper half of the passenger compartment and a lower half of the passenger compartment, respectively. The upper half of the passenger compartment and the lower half of the passenger compartment are usually connected by fastening with bolts in a state where the joint surfaces provided on the peripheral edges of the upper half of the passenger compartment and the lower half of the passenger compartment are abutted against each other. ..

Power plants are obliged to carry out periodic inspections, and such periodic inspections also carry out inspections of steam turbines. At this time, along with the inspection of the steam turbine, repair work of each part of the steam turbine may be carried out. For example, in addition to non-destructive inspection of the inner and outer surfaces of the vehicle interior, repair work may be performed on the inner and outer surfaces, or joint surfaces of the upper half of the vehicle interior and the lower half of the vehicle interior may be repaired. The joint surface is a portion that is easily deformed by the heat of steam during the operation of the steam turbine, and it is likely that correction processing or the like is required.

When performing the above-mentioned repair work or the like, usually, the upside-down work of the upper half of the passenger compartment is carried out so that the joint surface of the upper half of the passenger compartment facing downward in the installed state faces upward. In this case, the upper half of the passenger compartment may be turned upside down by using an overhead crane installed in the turbine building of the power plant.

If the overhead crane installed in the turbine building of the power plant has a main winding and an auxiliary winding, and the auxiliary winding capacity is more than half the weight of the cabin half body, the main winding and the auxiliary winding are used together. It can be turned upside down by hanging at 4 points. However, if the supplementary winding capacity is less than half the weight of the passenger compartment half body, or if the overhead crane does not have supplementary winding, it cannot be turned upside down by suspending at four points. In this case, it is necessary to turn it upside down by suspending it at two points using only the main winding of the overhead crane.

Both the 4-point suspension and the 2-point suspension are technically difficult and dangerous tasks. In particular, 2-point suspension is a technically more difficult task than 4-point suspension, so it is necessary for a crane driver / sling signaler with skilled special skills to perform the work. However, these days, the number of such technicians is decreasing and becoming scarce.

In addition, during regular inspections, overhead cranes may be used for disassembling and repairing parts other than steam turbines, such as generators, and the frequency of use of overhead cranes increases. Therefore, it may be difficult to use the overhead crane in preference to the upside down of the upper half of the passenger compartment. In addition, it is naturally required to shorten the usage time of the overhead crane in the upside-down work of the upper half of the passenger compartment.

Hereinafter, a general method of upside down the vehicle interior by four-point suspension and two-point suspension will be described with reference to FIGS. 22 and 23. In FIGS. 22 and 23, reference numeral 1 indicates the upper half of the passenger compartment. One of the two side portions of the upper half of the passenger compartment 1 is provided with a pair of passenger compartment trunnions 2a and 2b, and the other is provided with a pair of passenger compartment trunnions 2c and 2d. The passenger compartment trunnions 2a and 2c are provided on one side in the turbine axial direction, and the passenger compartment trunnions 2b and 2d are provided on the other side in the turbine axial direction. Since the passenger compartment trunnions 2c and 2d are located on the back side of the paper in FIGS. 22 and 23, they do not appear in the drawings, but their respective installation positions are indicated by broken line leaders for convenience of explanation. There is. Further, FIG. 22 shows an overhead crane 100 having a main winding hook 101 and an auxiliary winding hook 102, and FIG. 23 shows an overhead crane 110 having one hook 111 without the auxiliary winding hook. ing.

First, upside down by hanging at four points will be described. With reference to FIG. 22 (A), the wire 300a is hung on the passenger compartment lane 2a and the main winding hook 101, and the wire 300c is hung on the passenger compartment lane 2c and the main winding hook 101. .. Further, the wire 300b is hung on the passenger compartment lane 2b and the auxiliary winding hook 102, and the wire 300d is hung on the passenger compartment lane 2d and the auxiliary winding hook 102. After that, the main winding hook 101 and the auxiliary winding hook 102 are wound up at the same time to lift the upper half 1 of the passenger compartment.

Next, as shown in FIG. 22 (B), the auxiliary winding hook 102 is hung from the main winding hook 101, and as shown in FIG. 22 (C), the joint surface of the upper half 1 of the passenger compartment is located along the vertical direction. Rotate the upper half 1 of the passenger compartment until.

Next, as shown in FIG. 22 (D), the wires 300b and 300d hung on the auxiliary winding hook 102 are removed from the passenger compartment trunnions 2b and 2d. Then, the upper half 1 of the passenger compartment suspended from the main winding hook 101 is rotated around the vertical axis, and is inverted around the vertical axis as shown in FIG. 22 (E). At this time, the wires 300b and 300d are held at predetermined positions so that the wires 300b and 300d hung on the auxiliary winding hook 102 do not interfere with the upper half 1 of the passenger compartment.

Next, the wires 300b and 300d removed in FIG. 22D are hung on the passenger compartment trunnions 2b and 2d again. Then, as shown in FIG. 22 (F), the auxiliary winding hook 102 is wound up to a position where the joint surface of the passenger compartment upper half 1 is along the horizontal direction, whereby the passenger compartment upper half 1 is turned upside down.

Next, the upside down of the passenger compartment by suspending at two points will be described. First, as shown in FIG. 23A, the wire 300a is hung on the passenger compartment lane 2a and hook 111, and the wire 300c is hung on the passenger compartment lane 2c and hook 111.

Next, as shown in FIG. 23B, the hook 111 is wound up to lift one side of the upper half 1 of the passenger compartment. At this time, as shown by the arrow C, the hook 111 is traversed toward the floor contact position of the upper half 1 of the passenger compartment. Then, as shown in FIG. 23C, the passenger compartment upper half 1 is rotated until the joint surface of the passenger compartment upper half 1 is along the vertical direction.

Next, the upper half 1 of the passenger compartment suspended by the hook 111 is rotated about the vertical axis and inverted around the vertical axis as shown in FIG. 23C.

Next, as shown in FIG. 23 (D), the upper half 1 of the passenger compartment is temporarily placed on the reversing stand 400A. At this time, the ends of the upper half 1 of the passenger compartment on the passenger compartment lanes 2b and 2d side are brought into contact with the upper surface of the reversing mount 400A from above. Subsequently, as shown by the arrow D in FIG. 23 (E), the hook 111 is lowered while traversing to the side away from the reversing pedestal 400A, and the end of the upper half 1 of the passenger compartment in contact with the reversing pedestal 400A is used as a fulcrum. As a result, the upper half 1 of the passenger compartment is tilted. Then, the hook 111 is operated until the joint surface of the passenger compartment upper half 1 is aligned with the horizontal direction, whereby the passenger compartment upper half 1 is turned upside down. At this time, the ends of the upper half 1 of the passenger compartment on the side of the passenger compartment lanes 2a and 2c are placed on the inverted pedestal 400B different from the inverting pedestal 400A.

As described above, 4-point suspension and 2-point suspension are tasks that require special skills, and it is necessary to invite a crane driver / slinging signaler with skilled special skills to carry out the tasks. In consideration of these points, various techniques have been proposed so far for the purpose of easily and efficiently upside down and disassembling the vehicle interior.

Japanese Unexamined Patent Publication No. 10-317912 Japanese Unexamined Patent Publication No. 2014-177888 JP-A-2017-125411

The problem to be solved by the present invention is a method of upside down the cabin half body, which can easily turn the cabin half body upside down at low cost while suppressing the usage time of the overhead crane as much as possible. It is an object of the present invention to provide a rotating shaft bracket and a pedestal for reversing to be used.

The method of turning the cabin half body upside down according to the embodiment is a method of turning the cabin half body upside down of the steam turbine, and the rotary shaft bracket having the rotating shaft is attached to the turbine shaft. The passenger compartment half is arranged on one side and the other side of the passenger compartment half body in the direction, and the rotary shaft on one side and the rotary shaft on the other side are coaxial and parallel to the turbine axial direction. It includes a step of attaching to the body and a step of turning the vehicle interior half body upside down by rotating the rotary shaft around the central axis of the rotary shaft.

Further, the rotary shaft bracket according to the embodiment is a rotary shaft bracket attached to the passenger compartment half body in order to turn the passenger compartment half body of the steam turbine upside down, and supports the rotary shaft and the rotary shaft. It also includes a bracket body that can be attached to the passenger compartment half body. The rotary shaft bracket is configured so that the rotary shaft is parallel to the turbine axial direction when the bracket body is attached to the passenger compartment half body. The rotary shaft bracket is configured to rotate the vehicle interior half body by rotating the rotary shaft around the central axis of the rotary shaft.

Further, the reversing pedestal according to the embodiment is the vehicle interior half body via a rotating shaft bracket having a rotating shaft, which is attached to the vehicle interior half body in order to turn the vehicle interior half body of the steam turbine upside down. It is a reversing stand that supports. The reversing pedestal is provided with a support surface rotatably supporting the rotary shaft at the upper portion, and a chain is attached to the other end of a towing wire whose one end is connected to the outer peripheral surface of the rotary shaft supported by the support surface. A tool holding portion for holding the chain driving portion of the chain traction tool to which one end is connected is provided on the side portion. The reversing pedestal is configured to rotate the rotating shaft on the supporting surface when one end of the chain moves toward the chain driving unit held by the tool holding portion.

According to the present invention, it is possible to easily upside down the vehicle interior half body at low cost while suppressing the usage time of the overhead traveling crane as much as possible.

It is a figure which shows the state which the upper half of the vehicle interior which is upside down by the method of upside down of the vehicle interior half body which concerns on one Embodiment is supported by the pedestal for reversal via a rotary shaft bracket. It is the figure which looked at the upper half of the passenger compartment in the direction of arrow II of FIG. It is a side view of the upper half of the passenger compartment shown in FIG. It is a top view of the upper half of the passenger compartment shown in FIG. It is a front view of the rotary shaft bracket shown in FIG. It is a side view of the rotary shaft bracket shown in FIG. It is a top view of the rotary shaft bracket shown in FIG. It is a figure explaining the upside-down method of the vehicle interior half body which concerns on one Embodiment, and is the figure which shows the state which the upper half of the vehicle interior is installed on the setup cradle. FIG. 7 is a view of the upper half of the passenger compartment viewed in the direction of arrow VII in FIG. It is a figure explaining the work of attaching the rotary shaft bracket to the upper half of the passenger compartment installed in the setup cradle. It is a figure explaining the work of lifting the upper half of the passenger compartment to which the rotary shaft bracket is attached. It is a figure explaining the work of placing the upper half of the vehicle interior lifted from the state shown in FIG. 10 on the reversing stand. It is a figure explaining the work of providing the chain traction tool between the rotary shaft bracket attached to the upper half of the passenger compartment, and the reversing stand. It is the figure which looked at the upper half of the passenger compartment in the direction of the arrow XIII shown in FIG. It is a figure explaining the work of rotating the upper half of the vehicle interior on the reversing pedestal by the chain traction tool shown in FIG. It is a figure explaining the work of rotating the upper half of the vehicle interior on the reversing pedestal by the chain traction tool shown in FIG. It is a figure explaining the work of rotating the upper half of the vehicle interior on the reversing pedestal by the chain traction tool shown in FIG. It is a figure explaining the work of rotating the upper half of the vehicle interior on the reversing pedestal by the chain traction tool shown in FIG. It is a figure which shows the state which the upper half of the passenger compartment upside down from the state shown in FIG. It is a figure explaining the work of lifting the upper half of the vehicle interior shown in FIG. It is a figure explaining the work of placing the upper half of the vehicle interior lifted from the state shown in FIG. 18 on the setup cradle again. It is a figure which shows the state which removed the rotary shuff bracket from the upper half of the vehicle interior shown in FIG. It is a figure explaining the upside-down method of the vehicle interior by a general four-point suspension. It is a figure explaining the upside-down method of the vehicle interior by a general two-point suspension.

Hereinafter, one embodiment will be described in detail with reference to the accompanying drawings. Of the components in the following embodiments, the same components as those described with reference to FIGS. 21 and 22 are designated by the same reference numerals.

In FIG. 1, the upper half 1 of the passenger compartment, which is upside down by the method of turning upside down the half body of the steam turbine according to the embodiment, is supported by the inverted mounts 40A, 40B via the rotary shaft brackets 20A, 20B. It shows the state that was done. FIG. 2 is a view of the upper half 1 of the passenger compartment supported by the reversing mounts 40A and 40B in the direction of arrow II in FIG.

In the method of upside down the passenger compartment half body according to the present embodiment, the passenger compartment upper half 1 is rotated from the state shown in FIGS. 1 and 2 on the flipping pedestals 40A and 40B in the direction of the arrow of FIG. Then, it is turned upside down. Hereinafter, the details of the upper half 1 of the passenger compartment, the rotating shaft brackets 20A and 20B used for reversing the chassis, the reversing mounts 40A and 40B, and the upside down method will be described.

(Upper half of the passenger compartment)
First, the upper half 1 of the passenger compartment, which is the target of upside down, will be described with reference to FIGS. 3A and 3B. The upper half of the passenger compartment 1 is paired with the lower half of the passenger compartment (not shown) to accommodate nozzles (static blades) and moving blades. Generally, a steam turbine has an internal casing and an external casing provided outside the internal casing. The upper half of the passenger compartment 1 described here corresponds to the upper half of the passenger compartment of the external passenger compartment.

With reference to FIGS. 2 and 8 and the like, the passenger compartment upper half 1 has a semi-cylindrical upper half body 1A for accommodating nozzles and rotor blades. When the upper half body 1A accommodates the nozzle and the moving blade, the rotor shaft of the turbine rotor supporting the moving blade passes through the axial end portion of the upper half body 1A along the axial direction of the upper half body 1A. That is, when the upper half body 1A accommodates the nozzle and the moving blade, the axial direction of the upper half body 1A is the same as the turbine axial direction TD. Therefore, in the following, when the orientation of the upper half 1 of the passenger compartment and each part will be described, the term turbine axial direction TD may be used for convenience of explanation. In FIGS. 1, 3A and 3B, the turbine axial TD is indicated by an arrow.

The upper half 1 of the passenger compartment has flanges 1B extending from both sides of the upper half body 1A which is located so as to face each other in a direction orthogonal to the turbine axial direction TD in a plan view and extends along the turbine axial direction TD. are doing. The illustrated flange portion 1B includes a pair of portions extending along the turbine axial direction TD and a portion extending from both ends of each of these portions so as to wrap around to the axial end side of the upper half body 1A. .. The lower surface of the flange portion 1B forms a joint surface 4, and the joint surface 4 is provided with a plurality of bolt holes 6 penetrating the surface on the opposite side. In the upper half 1 and the lower half of the passenger compartment, the joint surface 4 is abutted against the joint surface of the lower half of the passenger compartment (not shown), and is provided on the bolt hole 6 of the joint surface 4 and the joint surface of the lower half of the passenger compartment. By fastening the bolts that are inserted across the bolt holes that have been formed, they are integrated with each other.

Further, on the side surface of the flange portion 1B facing one side in the direction orthogonal to the turbine axial direction TD in a plan view, the passenger compartment trunnions 2a and 2b are provided, and the flange facing the other side in the direction orthogonal to the turbine axial direction TD. The passenger compartment trunnions 2c and 2d are provided on the side surface of the portion 1B. The passenger compartment trunnion 2a and the passenger compartment trunnion 2c are located at positions facing each other in a direction orthogonal to the turbine axial direction TD, and are located on one side (left side of FIGS. 3A and 3B) in the turbine axial direction TD. The passenger compartment trunnion 2b and the passenger compartment trunnion 2d are located at positions facing each other in a direction orthogonal to the turbine axial direction TD, and are located on the other side (right side of FIGS. 3A and 3B) in the turbine axial direction TD. The passenger compartment trunnions 2a to 2d are designed to be hung with wires, and are configured as suspension points for lifting the upper half 1 of the passenger compartment with a crane.

Further, a steam inlet pipe connecting portion 8 is provided above the upper half main body 1A. A steam inlet pipe (not shown) for supplying steam from a boiler (not shown) is connected to the steam inlet pipe connecting portion 8. Further, a crossover pipe connecting portion 9 is provided on the upper portion of the upper half main body 1A. A crossover pipe (not shown) that supplies steam from the upper half 1 of the passenger compartment to another steam turbine (low-pressure turbine) is connected to the crossover pipe connecting portion 9.

(Rotating shaft bracket)
Next, the rotary shaft brackets 20A and 20B will be described with reference to FIGS. 4 to 6. The rotary shaft bracket 20A is attached to the passenger compartment upper half 1 on one side in the turbine axial TD, and the rotary shaft bracket 20B is attached to the passenger compartment upper half 1 on the other side in the turbine axial TD. Since the rotary shaft brackets 20A and 20B have basically the same configuration except that the mounting positions are different, only the rotary shaft bracket 20A mounted on one side of the upper half 1 of the passenger compartment will be described below for rotation. The description of the shaft bracket 20B will be omitted.

As shown in FIGS. 4 to 6, the rotary shaft bracket 20A includes a rotary shaft 21 and a bracket main body 22 that supports the rotary shaft 21 and is attached to the upper half 1 of the passenger compartment. As shown in FIGS. 1 and 2, when the bracket main body 22 is attached to the upper half 1 of the passenger compartment, the rotating shaft 21 is supported by the bracket main body 22 so as to be parallel to the turbine axial direction TD. As will be described later, the rotary shaft bracket 20A rotates the upper half 1 of the passenger compartment by rotating the rotary shaft 21 around its central axis. That is, the rotary shaft 21 functions as a rotation center axis when the upper half 1 of the passenger compartment is turned upside down.

The bracket main body 22 has a flat plate-shaped base plate 23 fixed to the joint surface 4 of the upper half of the passenger compartment 1 and a pair of mounting plates 24 rising from the base plate 23, and is between the pair of mounting plates 24. It supports the rotating shaft 21. As shown in FIG. 6, the base plate 23 is provided with a plurality of base plate bolt holes 23A that are superposed on the plurality of bolt holes 6 provided on the joint surface 4 of the upper half 1 of the passenger compartment. ..

As shown in FIG. 1, the base plate 23 is abutted against the joint surface 4, and in this state, the bracket fastening bolts 23B are inserted into the plurality of bolt holes 6 and the plurality of base plate bolt holes 23A that overlap each other. Is fastened to the nut 23C arranged on the upper surface of the flange portion 1B. As a result, the base plate 23 is attached to the upper half 1 of the passenger compartment. When the base plate 23 is fixed to the joint surface 4 in this way, the rotating shaft 21 protrudes from the upper half 1 of the passenger compartment in the turbine axial direction TD, and as shown in FIG. 2, when viewed in the turbine axial direction TD. It is located inside the upper half 1 of the passenger compartment.

The rotary shaft 21 is supported by support bolts 24A penetrating each of the pair of mounting plates 24, and the support bolts 24A are screwed into the portion of the rotary shaft 21 located between the pair of mounting plates 24. Section 21A (see FIGS. 4 and 6) is provided. Further, in this example, the rotating shaft 21 is supported by the bracket body 22 so that the relative position with respect to the bracket body 22 can be adjusted. Specifically, as shown in FIG. 5, a plurality of bolt holes 24B into which the support bolts 24A can be inserted are provided in a matrix on the pair of mounting plates 24, and at a desired position from the plurality of bolt holes 24B. The height position of the rotary shaft 21 can be adjusted by selecting the bolt hole and inserting the support bolt 24A.

When the relative position of the rotary shaft 21 with respect to the bracket main body 22 can be adjusted, the position of the rotary shaft 21 when the rotary shaft bracket 20A is attached to the upper half 1 of the passenger compartment can be adjusted to a desired position. At this time, for example, when the position of the rotary shaft 21 is adjusted so as to overlap the center of gravity of the upper half 1 of the passenger compartment when viewed in the turbine axial direction TD, particularly so as to be coaxial, the passenger compartment It is possible to stably invert the upper half 1 upside down.

Further, on the outer peripheral surface of the rotating shaft 21, a pair of connecting portions 25 capable of connecting one end of the towing wire 32 (see FIGS. 1 and 2) are provided. As will be described later, the towing wire 32 is connected to the rotating shaft 21 via the connecting portion 25, and the rotating shaft 21 is rotated by being pulled by the towing wire 32. The connecting portion 25 is not particularly limited as long as the towing wire 32 can be connected, but the connecting portion 25 of this example is an annular shape that can swing around a rotating shaft extending in the axial direction of the rotating shaft 21. It is composed of metal fittings. Further, two connecting portions 25 are provided on the outer peripheral surface of the rotating shaft 21, one of the two connecting portions 25 is provided on the upper surface of the rotating shaft 21, and the other is provided on the lower surface of the rotating shaft 21. The two connecting portions 25 in this example are provided so as to face each other with the central axis of the rotating shaft 21 interposed therebetween.

Further, on the upper surface of the rotary shaft 21, two eyebolt mounting screw holes 26 arranged so as to sandwich the connecting portion 25 are provided with reference to FIG. When the eyebolt is provided in the eyebolt mounting screw hole 26, for example, by hanging a wire on the eyebolt, the rotary shaft bracket 20A can be lifted and transported.

(Reversing stand)
Next, the reversing mounts 40A and 40B will be described with reference to FIGS. 1 and 2. The reversing pedestal 40A supports the rotating shaft 21 of the rotating shaft bracket 20A attached to the upper half 1 of the passenger compartment on one side of the turbine axial TD, and the reversing pedestal 40B is a vehicle on the other side of the turbine axial TD. The rotating shaft 21 of the rotating shaft bracket 20B attached to the upper half 1 of the chamber is supported. The reversing mounts 40A and 40B have basically the same configuration except that the arrangement is different.

As shown in FIGS. 1 and 2, the reversing mounts 40A and 40B are provided with a support surface 41 for supporting the rotary shaft 21 at the upper portion, and a tool holder for holding the chain drive portion 51 of the chain traction tool 50 on both sides. The part 42 is provided. The support surface 41 is an arcuate surface that is open upward, and is in contact with the outer peripheral surface of the rotary shaft 21 to support the rotary shaft 21 in a state in which the rotary shaft 21 can rotate about the central axis. In the present embodiment, one end of the chain 52 of the chain traction tool 50 is connected to the other end of the towing wire 32 whose one end is connected to the outer peripheral surface of the rotary shaft 21 supported by the support surface 41 via the above-mentioned connecting portion 25. The rotary shaft 21 is rotated by pulling the chain 52.

The chain pulling tool 50 pulls the chain 52 by the chain driving unit 51, and the chain driving unit 51 has a manual lever and pulls or feeds the chain 52 by operating the lever (so-called lever block (registered). (Trademark)), or the chain 52 may be towed or unwound by an electric motor. The tool holding portion 42 is provided to hold the chain driving portion 51 of such a chain traction tool 50 on the reversing mounts 40A and 40B, whereby one end of the chain 52 is held by the tool holding portion 42. When moving toward the chain drive unit 51, the rotary shaft 21 can be rotated on the support surface 41.

Further, as shown in FIG. 2, a wire sliding cover 43 is attached to each of the upper corners of the reversing mounts 40A and 40B located between the support surface 41 and the tool holding portion 42, respectively. The surface of the wire sliding cover 43 is an arc surface, and it is preferable that the wire sliding cover 43 is made of a plastic material or the like that is relatively flexible and has low frictional resistance. When the towing wire 32 and the chain towing tool 50 are interposed between the outer peripheral surface of the rotary shaft 21 and the tool holding portion 42 as described above, the wire sliding cover 43 may come into contact with the towing wire 32. This makes it possible to smoothly pull the chain traction tool 50.

(Upside down method)
Subsequently, the upside-down method according to the present embodiment using the rotary shaft brackets 20A and 20B and the reversing mounts 40A and 40B described above will be described in detail with reference to FIGS. 7 to 20.

7 and 8 show a state in which the upper half 1 of the passenger compartment is installed on the setup cradle 60A and 60B. In the present embodiment, first, the upper half 1 of the passenger compartment is placed on the two setup cradle 60A and 60B. The upper half 1 of the passenger compartment is supported by two setup cradle 60A and 60B with the joint surface 4 facing downward. One of the two setup cradle 60A and 60B, one of the setup cradle 60A, supports one side portion of the passenger compartment upper half 1 in the direction orthogonal to the turbine axial direction TD as shown in FIG. The other setup cradle 60A supports the other side of the upper half 1 of the passenger compartment in a direction orthogonal to the turbine axial direction TD.

The two setup cradle 60A and 60B support the central portion of the passenger compartment upper half 1 in the turbine axial direction TD, and the passenger compartment upper half 1 is the turbine shaft from the two setup cradle 60A and 60B. Overhanging in the direction TD. When the passenger compartment upper half 1 is placed on the two setup cradle 60A and 60B, in the present embodiment, the passenger compartment upper half 1 is lifted by an overhead crane via the passenger compartment trunnions 2a to 2d. Is omitted.

Next, as shown in FIG. 9, the rotary shaft brackets 20A and 20B are attached to the upper half 1 of the passenger compartment. The rotary shaft bracket 20A is arranged on one side of the passenger compartment upper half 1 in the turbine axial TD and then attached to the passenger compartment upper half 1, and the rotary shaft bracket 20B is attached to the passenger compartment upper half 1 in the turbine axial TD. After being placed on the other side of the vehicle, it is attached to the upper half of the passenger compartment 1. At this time, eyebolts (not shown) are attached to the eyebolt mounting screw holes 26 provided on the rotary shaft 21, and then the rotary shaft brackets 20A and 20B are via the eyebolts by an overhead crane 110 having one hook 111. Is lifted. The lifting work of the rotary shaft bracket 20A and the lifting work of the rotary shaft bracket 20B are performed separately.

To attach the rotary shaft brackets 20A and 20B to the upper half 1 of the passenger compartment, the rotary shaft brackets 20A and 20B in the suspended state were moved horizontally by the overhead crane 110 and positioned with respect to the upper half 1 of the passenger compartment. Will be done later. In the rotary shaft bracket 20A, the base plate 23 of the bracket body 22 is abutted against one side of the joint surface 4 in the turbine axial direction TD, and the plurality of bolt holes 6 and the plurality of base plate bolt holes 23A overlap each other. After being positioned in (see FIGS. 3B and 6), it is attached to the upper half 1 of the passenger compartment by the bracket fastening bolt 23B. The rotary shaft bracket 20B is also attached to the upper half 1 of the passenger compartment in the same procedure as described above after the base plate 23 of the bracket body 22 is abutted against the other side of the joint surface 4 in the turbine axial direction TD.

In the rotary shaft brackets 20A and 20B attached to the upper half 1 of the passenger compartment, the respective rotary shafts 21 are coaxial and parallel to the turbine axial direction TD. Further, each rotary shaft 21 protrudes from the upper half 1 of the passenger compartment in the turbine axial direction TD, and is located inside the upper half 1 of the passenger compartment when viewed in the turbine axial direction TD. Further, the rotary shaft brackets 20A and 20B are attached to the upper half 1 of the passenger compartment so that the central axis of the rotary shaft 21 overlaps the center of gravity of the upper half 1 of the passenger compartment when viewed in the turbine axial direction TD. In this case, the upper half 1 of the passenger compartment can be stably rotated around the central axis of the rotating shaft 21.

Here, in the illustrated example, the hook 111 and the eyebolt are connected by the chain block 61 and the relay wire 62. The chain block 61 includes a hook chain having a hook at one end, a winding portion that meshes with a portion between one end and the other end of the hook chain and has a hook, and a winding chain and a winding chain for operating the winding portion. However, when the hoisting chain is pulled, one end of the hook chain is pulled toward the hoisting portion side, and when the hoisting chain is pulled, the hook chain is unwound. In FIG. 9, the hook at one end of the hook chain is connected to the relay wire 62, and the hook of the hoisting portion is hung on the hook 111 of the overhead crane 110. When such a chain block 61 is used, the operation of the chain block 61 makes it easier to maintain the postures of the rotating shaft brackets 20A and 20B horizontally, and the work efficiency is improved.

Next, as shown in FIG. 10, wires 300a to 300d are hung between the cabin trunnions 2a to 2d of the passenger compartment upper half 1 and the hook 111 of the overhead crane 110, and the passenger compartment upper half 1 is hung by the overhead crane 110. lift.

Next, as shown in FIG. 11, the upper half 1 of the passenger compartment is placed on the reversing mounts 40A and 40B via the rotary shaft brackets 20A and 20B. At this time, the rotating shaft 21 of the rotating shaft bracket 20A is rotatably supported by the support surface 41 of the reversing pedestal 40A, and the rotating shaft 21 of the rotating shaft bracket 20B is rotatably supported by the supporting surface 41 of the reversing pedestal 40B. Be supported. At this time, the overhead crane 110 bears a part or all of the load of the passenger compartment upper half 1 so that the entire load of the passenger compartment upper half 1 is not applied to the reversing mounts 40A and 40B. As a result, it is possible to prevent the upper half 1 of the passenger compartment from unexpectedly rotating on the reversing mounts 40A and 40B due to its own weight.

Next, as shown in FIGS. 12 and 13, one of the two connecting portions 25 on the outer peripheral surface of the rotating shaft 21 of the rotating shaft bracket 20A and one of the two tool holding portions 42 of the reversing mount 40A. Are connected by a towing wire 32 and a chain towing tool 50. Further, the other of the two connecting portions 25 on the outer peripheral surface of the rotating shaft 21 of the rotating shaft bracket 20A and the other of the two tool holding portions 42 of the reversing pedestal 40A are the towing wire 32 and the chain towing. It is connected by the tool 50. The two connecting portions 25 on the outer peripheral surface of the rotating shaft 21 of the rotating shaft bracket 20B and the two tool holding portions 42 of the reversing pedestal 40A are also connected to each other by a towing wire 32 and a chain towing tool 50, respectively. ..

Specifically, one end of the towing wire 32 is connected to the connecting portion 25 on the outer peripheral surface of the rotating shaft 21, and the towing wire 32 is pulled out along the outer peripheral surface of the rotating shaft 21. Then, the towing wire 32 is hung on a hook provided at one end of the chain of the chain towing tool 50 at the other end. Further, a hook provided on the chain drive portion 51 of the chain traction tool 50 is hung on the tool holding portion 42 of the reversing stand 40A. Here, the towing wire 32 connected to one of the two connecting portions 25 on the outer peripheral surface of the rotating shaft 21 and the towing wire 32 connected to the other of the two connecting portions 25 are rotating shafts. They are pulled out in opposite directions in the circumferential direction of 21 and connected to the corresponding chain traction tool 50.

After providing the towing wire 32 and the chain towing tool 50 as described above, each chain towing tool 50 is towed (rolled up) and tension is applied to each towing wire 32 to make the upper half 1 of the passenger compartment. It is held so that it does not rotate. After that, the chain block 61 and the relay wire 62 provided between the hook of the overhead crane 110 and the eyebolt of the rotary shaft 21 are removed. At this time, it is confirmed that the upper half 1 of the passenger compartment does not rotate due to its own weight. When the upper half 1 of the passenger compartment is about to rotate, the chain towing tool 50 is towed to increase the tension of the towing wire 32 so that the rotation is restricted by the towing wire 32.

Next, the upper half 1 of the passenger compartment is turned upside down. At this time, in each of the rotary shaft brackets 20A and 20B, between one of the two connecting portions 25 on the outer peripheral surface of the rotary shaft 21 and one of the two tool holding portions 42 of the reversing mount 40A. The chain traction tool 50 is towed, and the chain traction tool 50 between the other of the two connecting portions 25 and the other of the two tool holding portions 42 is extended (rolled down). As a result, as shown in FIGS. 14 to 17, by rotating the rotary shaft 21 around the central axis of the rotary shaft 21, the upper half 1 of the passenger compartment rotates on the support surfaces 41 of the reversing mounts 40A and 40B. Will be done. Then, as shown in FIG. 17, when the joint surface 4 of the passenger compartment upper half 1 becomes horizontal and faces upward, the operation of the chain traction tool 50 is stopped and the rotation of the passenger compartment upper half 1 is stopped. Let me.

Next, the rotating shaft brackets 20A and 20B are removed. At this time, first, as shown in FIGS. 18 and 19, wires 300a to 300d are hung between the passenger compartment trunnions 2a to 2d in the upper half of the passenger compartment 1 and the hook 111 of the overhead crane 110, and the overhead crane 110 is used. Lift the upper half 1 of the passenger compartment. Then, as shown in FIG. 20, the upper half 1 of the passenger compartment is placed on the setup cradle 60A and 60B.

Then, the towing wire 32 and the chain towing tool 50 between the connecting portion 25 of each rotating shaft 21 and the tool holding portion 42 of the reversing stand 40A are removed. After that, as shown in FIG. 21, the rotary shaft brackets 20A and 20B are removed from the upper half 1 of the passenger compartment while being lifted by the overhead crane 110 via the eyebolts.

In the present embodiment described above, the rotary shaft brackets 20A and 20B having the rotary shaft 21 are arranged on one side and the other side of the upper half 1 of the passenger compartment in the turbine axial direction TD, and together with the rotary shaft 21 on one side. It is attached to the upper half 1 of the passenger compartment so that the rotating shaft 21 on the other side is coaxial and parallel to the turbine axial direction TD. Then, by rotating the rotary shaft 21 around the central axis of the rotary shaft 21, the upper half 1 of the passenger compartment is turned upside down. In such a vertical flipping method, it is not necessary to use an overhead crane when flipping the upper half 1 of the passenger compartment upside down. Further, when the rotary shaft brackets 20A and 20B having the rotary shaft 21 are attached to the upper half 1 of the passenger compartment to rotate the rotary shaft 21, a tool for applying a force for rotation (traction wire 32, chain traction tool). 50) and the like can be easily attached to the rotating shaft 21, and the structure for attachment can be simplified. Therefore, according to the present embodiment, the upside down of the vehicle interior half body (vehicle compartment upper half 1) can be easily performed at low cost while suppressing the usage time of the overhead traveling crane as much as possible.

In particular, since the rotary shaft 21 is attached to the upper half 1 of the passenger compartment so as to protrude from the upper half 1 of the passenger compartment in the turbine axial direction TD, it is extremely easy to attach a tool for applying a force for rotation. Further, in the present embodiment, one end of the towing wire 32 is connected to the outer peripheral surface of the rotary shaft 21, and the other end of the towing wire 32 is connected to one end of the chain of the chain towing tool 50. The rotary shaft 21 is rotated by pulling the other end of the towing wire 32 by the chain. When the rotating shaft 21 is used, the upper half 1 of the passenger compartment can be turned upside down with a simple tool such as the towing wire 32 and the chain towing tool 50, so that the device cost and the workload can be reduced. It can be effectively suppressed.

Further, the rotary shaft brackets 20A and 20B are attached to the passenger compartment upper half 1 so that the central axis of the rotary shaft 21 overlaps the center of gravity of the passenger compartment upper half 1. In this case, it is possible to stably upside down the upper half 1 of the passenger compartment. Further, in the present embodiment, since the relative position of the rotating shaft 21 with respect to the bracket body 22 can be adjusted, the position of the rotating shaft 21 can be easily adjusted to a desired position, and convenience can be ensured. ..

Further, the rotary shaft brackets 20A and 20B are attached to the upper half of the passenger compartment 1 by bracket fastening bolts 23B inserted into the bolt holes 6 provided in the joint surface 4 of the upper half of the passenger compartment 1. In this case, the joint surface 4 receives the rotational force (torque) transmitted to the upper half 1 of the vehicle interior due to the rotation of the rotary shaft 21 on the surface, so that it is possible to suppress the local excessive surface pressure on the joint surface 4. Therefore, the upper half 1 of the passenger compartment can be rotated while suppressing undesired damage between the rotary shaft brackets 20A and 20B and the upper half 1 of the passenger compartment.

Further, the rotary shaft 21 is placed on the reversing pedestals 40A and 40B and rotated on the reversing pedestals 40A and 40B, so that the upper half 1 of the vehicle interior is turned upside down. In this case, the upper half 1 of the passenger compartment can be rotated stably. In particular, in the present embodiment, since the rotary shaft 21 is rotatably supported by the support surfaces 41 provided on the reversing mounts 40A and 40B and rotated on the support surface 41, the rotary shaft 21 is rotated at a fixed position. The upper half 1 of the passenger compartment can be rotated stably and with a small work space.

Although one embodiment and its modifications have been described above, the above-described embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. This novel embodiment and modification can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. The above-described embodiments, modifications, and other modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and the equivalent scope thereof.

For example, in the above-described embodiment, the upside-down operation of the upper half 1 of the passenger compartment of the steam turbine has been described, but the upside-down method, the rotary shaft brackets 20A and 20B, and the upside-down mounts 40A and 40B according to the present embodiment have been described. It can also be applied upside down in the lower half of the passenger compartment.

1 ... Upper half of the passenger compartment, 1A ... Upper half body, 1B ... Flange portion, 2a, 2b, 2c, 2d ... Vehicle compartment tranny, 4 ... Joint surface, 6 ... Bolt hole, 20A, 20B ... Rotating shaft bracket, 21 ... Rotating shaft, 22 ... Bracket body, 23 ... Base plate, 23A ... Base plate bolt hole, 23B ... Bracket fastening bolt, 23C ... Nut, 24 ... Mounting plate, 32 ... Towing wire, 40A, 40B ... Reversing mount, 41 ... Support surface, 42 ... Tool holding part, 50 ... Chain traction tool, 51 ... Chain drive part, 60A, 60B ... Setup cradle, 61 ... Chain block, 62 ... Relay wire, 100, 110 ... Overhead crane, 101 ... Main winding hook, 102 ... Supplementary winding hook, 111 ... Hook, 300a, 300b, 300c, 300d ... Wire

Claims (13)

It is a method of flipping the cabin half of the steam turbine upside down.
A rotary shaft bracket having a rotary shaft is arranged on one side and the other side of the passenger compartment half body in the turbine axial direction, and the rotary shaft on one side and the rotary shaft on the other side are coaxial and the turbine shaft. The process of attaching to the cabin half body so that it is parallel to the direction,
A method for upside down a vehicle interior half body, comprising a step of turning the vehicle interior half body upside down by rotating the rotary shaft around a central axis of the rotating shaft. The method of upside down of the passenger compartment half body according to claim 1, wherein the rotating shaft is attached to the passenger compartment half body so as to project from the passenger compartment half body in the turbine axis direction. The passenger compartment half body and the other passenger compartment half bodies are connected by a bolt inserted so as to abut the joint surfaces provided on each of them and straddle the bolt holes provided on the respective joint surfaces. It has become
The passenger compartment according to claim 1 or 2, wherein the rotating shaft bracket is attached to the passenger compartment half body by a bracket fastening bolt inserted into the bolt hole provided in the joint surface of the passenger compartment half body. How to flip the half body upside down. A step of mounting each of the rotary shaft on one side in the turbine axial direction and the rotary shaft on the other side on the reversing pedestal and supporting the vehicle interior half body on the reversing pedestal is further provided.
The method for upside down the cabin half body according to any one of claims 1 to 3, wherein the rotary shaft is rotated on the flipping stand to turn the cabin half body upside down. The reversing pedestal has a support surface that rotatably supports the rotary shaft.
The method of upside down the passenger compartment half body according to claim 4, wherein the rotating shaft is rotated on the support surface. The upper and lower parts of the passenger compartment half body according to any one of claims 1 to 5, wherein the rotary shaft bracket is attached to the passenger compartment half body so that the central axis of the rotary shaft overlaps the center of gravity of the passenger compartment half body. Inversion method. Further provided is a step of connecting one end of the towing wire to the outer peripheral surface of the rotating shaft so that the towing wire runs along the outer peripheral surface of the rotating shaft.
The method of upside down the passenger compartment half body according to any one of claims 1 to 6, wherein the rotating shaft is rotated by pulling the other end of the towing wire. The upper and lower parts of the passenger compartment half body according to claim 7, wherein the other end of the towing wire is connected to one end of the chain of the chain towing tool, and the other end of the towing wire is pulled by the chain of the chain towing tool. Inversion method. A rotary shaft bracket attached to the passenger compartment half of the steam turbine to turn it upside down.
With a rotating shaft
It is provided with a bracket body that supports the rotating shaft and is attached to the passenger compartment half body.
When the bracket body is attached to the passenger compartment half body, the rotary shaft becomes parallel to the turbine axis direction, and the rotary shaft rotates about the central axis of the rotary shaft, whereby the passenger compartment half A rotating shaft bracket that rotates the body. The passenger compartment half body and the other passenger compartment half bodies are connected by a bolt inserted so as to abut the joint surfaces provided on each of them and straddle the bolt holes provided on the respective joint surfaces. It has become
The rotating shaft bracket according to claim 9, wherein the rotating shaft bracket is attached to the vehicle interior half body by a bracket fastening bolt that penetrates the bracket body and is inserted into the bolt hole. The rotary shaft bracket according to claim 9 or 10, wherein the rotary shaft is supported by the bracket body so that its relative position with respect to the bracket body can be adjusted. The rotary shaft bracket according to any one of claims 9 to 11, wherein a connecting portion capable of connecting one end of the towing wire is provided on the outer peripheral surface of the rotary shaft. A reversing pedestal that supports the vehicle interior half body via a rotating shaft bracket having a rotating shaft, which is attached to the vehicle interior half body to invert the vehicle interior half body of the steam turbine.
A support surface that rotatably supports the rotary shaft is provided on the upper portion, and one end of the chain is connected to the other end of a towing wire whose one end is connected to the outer peripheral surface of the rotary shaft supported by the support surface. A tool holder for holding the chain drive of the chain traction tool is provided on the side.
A reversing pedestal that rotates the rotating shaft on the support surface when one end of the chain moves toward the chain driving unit held by the tool holding unit.

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