JP2021116792A - Suspending tool for gas turbine combustor extraction and transfer and extraction and transfer method - Google Patents

Abstract

To provide a suspending tool which eliminates removal of instruments and piping, etc., and is capable of safely performing operations from extraction of a combustor to transfer to a mounting base with a simple device, and a combustor extraction and transfer method.SOLUTION: A suspending tool for gas turbine combustor extraction and transfer comprises: a rectangular horizontal frame 11 suspended by an overhead crane; a vertical longitudinal column 12 fixed in a center of one long side of the frame; a swivel drive 14 constituted of a worm speed reducer 14a in which a portable electric motor is connected in its lower end and rotated, and a mounting material 14b attached to the output shaft of the speed reducer; and a freely rotatable lock member 16 to be coupled with a flange surface of a combustor 1. The suspending tool mounts the lock member 16 on the flange surface of the combustor 1 and extracts it by moving the overhead crane and rotating the swivel drive 14, and the suspending tool moves through a narrow location while changing a load suspending attitude by actuating the swivel drive 14 and further transfers the combustor to a mounting base by bringing it into a vertical attitude.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hanging jig attached to an overhead crane that is taken out from the gas turbine main body and transferred to a mounting table for maintenance and inspection of the combustor.

In thermal power plants, gas turbines are often used in which compressors and combustors generate high-temperature, high-pressure gas to drive turbines to obtain rotational power.
The combustor is composed of two parts, for example, a head end (weight about 600 kg) and a unibody (weight about 400 kg), and a plurality (10 to 20 pieces) are arranged around the axis in front of the gas turbine body at a predetermined inclination angle. Has been done.
Since the combustor is exposed to high temperature and high pressure during operation, it has difficulty in durability, and in order to maintain its performance, it is taken out from the gas turbine body and inspected at regular intervals, and repairs or parts replacement are performed. It has been.

When taking out the combustor, it is necessary to attach a locking member to the flange surface of the combustor and pull it out in the axial direction of the combustor, but each combustor is attached radially with respect to the axis of the gas turbine. Therefore, the angle of the flange surface and the pull-out direction are different for each combustor.
For this reason, various means for easily pulling out the combustor have been developed. A suspension frame for pulling out the combustor is installed above the flange of the combustor (Patent Document 1), and a combustor is installed in an overhead crane. (Patent Document 2), etc., which is provided with a gripping means and an angle adjusting means so as to be compatible with each combustor.

The extraction device of Patent Document 1 was developed by the applicant, and includes a mounting base flange to be attached to the flange of the combustor, a rotary disk rotatably supported on the base flange side, and a base end on the rotary disk side. It is provided with a suspension frame that fixes a portion and projects the tip portion upward of the combustor, and pulls out the combustor by moving the suspension member back and forth along the suspension frame.
Further, the combustor assembly device of Patent Document 2 is equipped with a gripping means on a crane arm portion including a horizontal arm and a vertical arm formed in an inverted U shape, and is adjusted to adjust the inclination angle of the combustor. A part is provided.

Japanese Patent Application Laid-Open No. 2000-533370 JP 2015-25450

In the measure of Patent Document 1, the combustor can be easily taken out by attaching the locking member to the combustor and moving the suspension member back and forth along the suspension frame. However, this combustor take-out device needs to be installed above the combustor that takes out the take-out device for each combustor, and this work is performed by assembling the scaffolding, which requires a lot of time for the assembly and installation work. .. In addition, the taken out combustor must be transferred to the loading platform by preparing a trolley or a crane.

On the other hand, in the combustor assembly device of Patent Document 2, since the angle and the position can be adjusted for each combustor, there is little incidental work to be performed for each combustor.
However, in order to adjust the position of the gripping member on the flange surface of the combustor, the device is large and heavy because it is equipped with the first to third adjustment units. It is necessary to secure space by removing nearby structures and pipes. Further, since this adjustment unit is performed by operating the manual handle, it is laborious and takes a lot of time. It is difficult to transfer the combustor to the mounting table with an overhead crane while the combustor is gripped by this adjustment unit because the suspended load is unbalanced and other transfer means are required.

In one gas turbine, it takes a lot of workers to take out each combustor, transfer it to the mounting table, inspect and repair it, and assemble it to the gas turbine, and the gas turbine must be stopped for a long period of time.
In particular, a large number of equipment and pipes are laid around the gas turbine, and when removing the combustor, these must be removed to secure the necessary space.
Further, if the device of Patent Document 1 or Patent Document 2 is used, the combustor can be easily taken out and assembled, but the combustor is transferred to the mounting table by another transfer means, and the transshipment work and transfer to the transfer means are performed. There was a problem that the work had to be secured because the road had to be secured.

The present invention has been made in view of such circumstances, and it is possible to minimize incidental work such as removal of equipment and pipes around the combustor and assembly of scaffolds, and to take out the combustor with a simple device in a short period of time. It is an object of the present invention to provide a suspension jig for taking out and transferring a gas turbine combustor and a method for taking out and transferring a gas turbine combustor, which can be safely performed from the operation to the transfer to the mounting table without interruption.

The suspension jig for taking out and transferring the gas turbine combustor of the present invention has adopted the following means in order to achieve the above object. That is, it is a combustor suspension jig that is suspended by an overhead crane to take out a plurality of combustors attached to the outer periphery of the gas turbine casing and transfer them to a mounting table. The four corners are chain blocks and the hooks of the overhead crane. A rectangular horizontal frame suspended from a horizontal frame, a vertical vertical pillar fixed to the center of one of the long sides of the horizontal frame, and a vertical vertical pillar fixed to the center of the other long side fixed to the lower end of the vertical pillar. It consists of a swivel drive having a horizontal axis and a locking member connected to the swivel drive and connected to the flange surface of the combustor. The swivel drive connects a portable electric motor to an input shaft and rotates. It consists of a moving worm speed reducer and a mounting material attached to its output shaft, and the locking member is provided with a thrust bearing in the center and is rotatably attached to the mounting material, and the locking member rotates. It is characterized by having a means to lock the.

The suspension jig for taking out and transferring the gas turbine combustor of the present invention (hereinafter referred to as the main suspension jig) is provided with a swivel drive provided at the lower end of a vertical column fixed to a horizontal frame suspended by an overhead crane. Is provided with a locking member to be connected to the combustor, the combustor is taken out from the main body of the gas turbine, and the combustor is continuously transferred to the mounting table.
In this specification, the front-back and left-right directions are referred to as front-back in the direction in which the vertical column moves in the extension direction of the short side of the horizontal frame, and left-right in the direction in which the vertical column moves in the extension direction of the long side. Further, the combustor is divided into a head end and a unibody as described above, but since the locking member of this hanging jig is configured to be connected to any of them, it is particularly suitable for the head end and the unibody. There is no distinction, it is simply a combustor.

The size of the horizontal frame is not particularly limited, but may be about the size of the suspended load. The length of the vertical column may be appropriately adjusted depending on the position of the overhead crane and the height of the gas turbine.
The swivel drive is composed of a worm reducer fixed at the lower end of a vertical column and a mounting material attached to its output shaft. The worm reducer is for connecting and driving a portable electric motor, and the reduction ratio may be 1/50 to 1/100.
If a portable electric motor is connected to the input shaft of the worm reducer and operated, the mounting material rotates.
The mounting material is provided with a locking member for connecting to the flange surface of the combustor so as to be manually rotatable via a thrust bearing, and also has a function of locking the rotation by friction. ..

Since the two or three combustors located near the lower center of the gas turbine are in the shadow of the compressor and the locking member cannot reach them, when removing the combustors, as described in claim 2, as described in claim 2. An extension member may be attached between the vertical column and the swivel drive to position the locking member forward. It should be noted that 40 to 50 cm is sufficient for moving forward.

The work of taking out the combustor from the gas turbine main body and transferring it to the mounting table using this hanging jig may be performed as described in claim 3. That is, the four corners of the horizontal frame of this suspension jig are suspended by the hooks of the overhead crane via the chain block, and the lower end of the vertical column is moved to the front, back, left and right of the overhead crane and the lower end of the vertical column is moved to the gas turbine. Move it to the vicinity of the combustor, operate the swivel drive to face the locking member to the flange surface of the combustor, rotate the locking member to align the mounting holes, and bolt the locking member. In the first step of connecting to the flange surface of the combustor, the overhead crane is moved to pull out the combustor from the casing of the gas turbine, and the swivel drive and the locking member are rotated to change the suspension posture of the combustor. It consists of the second step of passing through a narrow place and the third step of operating a swivel drive in a space and transferring it to the mounting table in a nearly vertical posture with the flange surface of the combustor facing upward. It is a feature.

Operate the chain block appropriately so that the vertical columns are held vertically.
When the swivel drive is activated, the attitude of the combustor changes and the position of the center of gravity moves, so the position of the suspension core also changes, but since the horizontal frame is balanced, the suspended load is shaken and the vertical columns are It is possible to avoid a large tilt.
When operating the swivel drive, it is advisable to connect the portable electric motor to the input shaft of the worm reducer, operate it for a short time, and repeatedly operate it while checking the rotated state to change the attitude of the suspended load. In particular, in the work of changing the posture of the suspended load and passing through a narrow route in the second step, it is necessary to be careful not to let the suspended load come into contact with surrounding objects.

As described above, the suspension jig of the present invention includes a locking member that attaches a combustor to the lower end of a vertical column fixed to a horizontal frame suspended by an overhead crane via a swivel drive, and provides the combustor. It is taken out from the main body of the gas turbine and transferred to the mounting table. The swivel drive consists of a worm reducer that connects a portable electric motor to the input shaft and rotates it, and a mounting material attached to the output shaft. Since the stop member is attached to the mounting material and has a thrust bearing and a rotation locking means in the center, the locking member can be installed near the vertical column, becomes compact, and the locking member is connected to the combustor. It does not require complicated operations to take out.
In addition, there is no need to remove equipment and piping near the gas turbine to create space, and there is no need to install a dedicated combustor take-out device or scaffolding assembly work, and the taken-out combustor is transferred to the mounting table while being suspended. Therefore, the maintenance and inspection period can be significantly shortened as compared with the conventional case without interruption due to work such as transshipment of suspended loads.

Further, for the combustor in a position hidden in the plan view compressor of the gas turbine, as described in claim 2, an extension member may be attached between the vertical column and the swivel drive to position the locking member forward. For example, the combustor can be taken out in the same manner.

Further, in the work of taking out the combustor of the gas turbine and transferring it to the mounting table using this suspension jig, as described in claim 3, the swivel drive and the locking member are rotated to suspend the combustor. If you change the method and go through a narrow route (second step), and move to the mounting table in a nearly vertical posture with the flange surface of the combustor facing upward (third step) where there is space, the combustor can be moved. It can be transferred in a stable state in a short time, and the removal of equipment and pipes around the gas turbine is minimal (removal of fuel pipes, etc.), and the construction period can be greatly shortened.

It is an overall perspective view which shows the embodiment of this suspension jig of this invention. Similarly, (a) is a front view of FIG. 1, and (b) is a side view. In the same, it is a figure which shows the detail of the part B of FIG. 2 (a), and FIG. 2 (b) is a side view. Similarly, (a) is a front view of the mounting table, and (b) is a side view. Further, (c) is a side view showing a state in which the combustor is placed vertically. It is an overall perspective view which shows the use state of this hanging jig. The same, (a) is a front view which attached the extension member to this hanging jig, (b) is a perspective view.

Hereinafter, embodiments of the suspension jig will be described with reference to the drawings.
FIG. 1 is a perspective view showing the entire suspension jig, and FIG. 2 is a front view and a side view. Further, FIG. 3 is a diagram showing details of the swivel drive and the locking member.

In the suspension jig 10, a swivel drive 14 is provided at the lower end of a vertical vertical column 12 fixed to the horizontal frame 11, and a mounting material is rotatably provided on the output shaft, to which the combustor 1 of the combustor 1 is provided. A locking member 16 for connecting to the flange surface 1a is provided.

The horizontal frame 11 is composed of a long side 11a and a short side 11b, and hanging metal fittings 11c for connecting the chain blocks 5 are attached to the four corners. The size of the horizontal frame 11 is 1500 mm × 800 mm here.
The upper end of the vertical pillar 12 is fixed to the center of one long side 11a of the horizontal frame 11, and diagonal stays 11d are fixed to the vertical pillar 12 from the four corners of the horizontal frame 11.
The vertical pillar 12 has a length of 5000 mm here, and a seat plate 13 is fixedly attached to the lower end of the vertical pillar 12, and a swivel drive 14 is fixedly attached to the seat plate 13.

The swivel drive 14 is composed of a worm reducer 14a and a mounting member 14b connected to its output shaft, and the worm reducer 14a has a reduction ratio of 1/60 here.
When operating this, a separately prepared portable electric motor 20 is connected to the input shaft. In this way, since the power source is separated, it can be made compact without the need for routing such as electric wires.

The locking member 16 is provided on the mounting member 14b via a thrust bearing 17, and is provided with an arm 16a extending in three directions and having a bolt hole for connecting with a bolt hole formed on the flange surface of the combustor 1. Has been done. The locking member 16 can be manually rotated by the thrust bearing 17, but is provided with a locking means 17a (not shown) that is stopped by friction so as to rotate only when necessary.

Since this suspension jig is configured in this way, the locking member 16 is moved by moving the overhead crane back and forth, left and right, moving up and down, and connecting the portable electric motor 20 to rotate the swivel drive 14. Can face the flange surface of the combustor 1. It should be noted that the operation of the overhead crane is convenient if it is operated by the remote controller while observing the moving state near the locking member. Further, in this case, if necessary, the vertical column 12 is manually rotated.

Further, when the bolt holes of the combustor 1 and the bolt holes of the locking member 16 are matched and connected by bolts, the locking means 17a is opened to make the locking member 16 rotatable and manually rotated.
The work of pulling out the combustor 1 from the casing and the work of transferring it to the mounting table are continuously performed while the combustor 1 is suspended. In this case, it is necessary to change the attitude of the suspended load by operating the swivel drive as necessary, such as when passing through a narrow place. If the posture of the combustor 1 is such that the flange surface is located at the upper end, the center of gravity of the suspended load is located substantially in the center of the horizontal frame 11, so that stable transfer can be performed without shaking. Let's take this position.

The transferred combustor 1 is placed on a mounting table for maintenance and inspection. The mounting table 30 is assembled by welding channel steel, for example, as shown in FIG. 4, and the combustor 1 is attached to (a) and (b). It can be placed horizontally as shown in (c) or vertically as shown in (c). The maintenance and inspection work is performed with the combustor 1 in the horizontal orientation, and when it is suspended, it is in the vertical orientation.

Next, an embodiment of the invention of claim 3 will be described.
This gas turbine combustor take-out transfer method is a work of taking out the combustor from the gas turbine main body using the main suspension jig and transferring it to the mounting table without interruption, and the locking member 16 of the main suspension jig 10 The first step of connecting the combustor 1 to the flange surface of the combustor 1 and the second step of taking out the combustor 1 from the gas turbine main body and operating a swivel drive to change the suspension posture of the combustor 1 while passing through a narrow place. It is composed of a third step of transferring the combustor 1 to the mounting table in a vertical state with the flange surface at the upper end.

In this work, it is important to appropriately operate the chain block so that the vertical column 12 of the main suspension jig 10 is maintained vertically. In addition, when changing the suspension posture of the combustor, it is necessary to pay sufficient attention to the surrounding conditions.
In the first step, the locking member is aligned with the flange surface of the combustor by the operation of the overhead crane and the swivel drive, and the locking member is rotated and connected with bolts. Since the angles are different, it is necessary to operate the overhead crane and the swivel drive each time.

In this hanging jig 10, it can be brought close to most of the combustor 1 of the gas turbine and can be taken out, but two or three at the lowermost end are in the shadow of the compressor, and the locking member 16 I haven't received it. When taking out this combustor, as shown in FIG. 6, an extension member 25 is fixedly installed between the vertical column 12 and the swivel drive 14. With such a configuration, it is possible to prevent the vertical column 12 from interfering with the compressor, and the combustor 1 can be taken out and transferred in the same manner as in the above case. The length of the extension member 25 is set to 40 cm here.

In the second step, the posture of the combustor 1 when pulled out is not stable as shown in FIG. 5, but since it is a narrow place, it is operated with the swivel drive 14 and locked if necessary. The member 16 is also rotated to change the posture of the combustor 1 so as to pass through the combustor 1 so as not to hit the structure or the like.
Then, in the third step, the posture of the combustor 1 is changed so that the flange surface of the combustor 1 is located at the upper end by operating the swivel drive after exiting to a place having a space. In this posture, since the center of gravity of the suspended load is located substantially in the center of the horizontal frame 11, it can be said that the suspended load is in the most stable suspended state without being shaken.

1 Combustor 1a Flange surface 5 Chain block 10 Hanging jig 11 Horizontal frame 11a Long side 11b Short side 11c Hanging bracket 11d Stay 12 Vertical pillar 13 Seat plate 14 Swivel drive 14a Warm reducer 14b Mounting material 16 Locking member 16a Arm 17 Thrust bearing 17a Locking means 20 Portable motor 25 Extension member

Claims (3)

A combustor suspension jig that is suspended by an overhead crane to take out multiple combustors attached to the outer periphery of the gas turbine casing and transfer them to a mounting table. The four corners are suspended by chain blocks on the hooks of the overhead crane. A rectangular horizontal frame to be held, a vertical vertical column fixed to the center of one of the long sides of the horizontal frame, and a horizontal to the center of the other long side fixed to the lower end of the vertical column. It consists of a swivel drive having an axial center and a locking member connected to the swivel drive and connected to the flange surface of the combustor, and the swivel drive connects a portable electric motor to an input shaft to rotate it. It consists of a worm reducer and a mounting material attached to its output shaft, and the locking member is provided with a thrust bearing in the center and is rotatably attached to the mounting material and locks the rotation of the locking member. A hanging jig for taking out and transferring a gas turbine combustor, which is characterized by being provided with a means for carrying out the combustion. In order to take out two or three combustors attached to the positions hidden by the plan view compressor among the plurality of combustors, an extension member is attached between the vertical column and the swivel drive to move the locking member forward. The suspension jig for taking out and transferring a gas turbine combustor according to claim 1, wherein the gas turbine combustor is positioned at. The four corners of the horizontal frame of the suspension jig for taking out and transferring the gas turbine combustor are suspended by the hooks of the overhead crane via the chain block, and the vertical columns are moved by moving the overhead crane back and forth and left and right and moving the vertical columns up and down. Move the lower end to the vicinity of the combustor of the gas turbine, operate the swivel drive to make the locking member face the flange surface of the combustor, make the locking member rotatable, align the mounting holes, and bolt In the first step of connecting the locking member to the flange surface of the combustor, the overhead crane is moved to pull out the combustor from the casing of the gas turbine, and the swivel drive and the locking member are rotated to rotate the combustor. The second step of changing the suspension posture and passing through a narrow place, and the third step of operating the swivel drive in a space and transferring it to the mounting table in a nearly vertical posture with the flange surface of the combustor facing upward. A gas turbine combustor take-out and transfer method characterized by consisting of.

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