JPH0786079B2 - Disassembling method of jacking device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a jacking device for adjusting the installation position of a waste heat recovery boiler in a power plant during installation work.

(Prior Art) A waste heat recovery boiler in a thermal power plant weighs 100 tons. Since this boiler escapes downward expansion due to thermal expansion, it is suspended from the floor and suspended between dedicated support frames. In the boiler installation work, it is difficult to make fine adjustments to arrange the boiler at a predetermined installation position only by the crane. Therefore, conventionally, a jacking device has been proposed in which the boiler is lifted and supported downward and the vertical and horizontal positions of the boiler are adjusted (for example, JP-A-60-20295). This device is placed on a rail that is passed over a horizontal beam of a support frame, and is moved below this rail to be installed below the boiler. A hydraulic jack installed on the rack supports the block. The vertical position of the boiler is adjusted via the, and the horizontal position is adjusted by the horizontal guide device.

(Problems to be solved by the invention) In the above-mentioned conventional device, since the hydraulic jack and the support block project onto the pedestal, they are moved to a working position through a space having a small height, and There was a problem that it became an obstacle when removing it.

The present invention relates to a method for solving the above-mentioned conventional problems and disassembling component parts such as a hydraulic jack and a support block for loading and unloading the device and storing them in a low position on a gantry.

(Means for Solving Problems) In order to solve the above conventional problems, in the present invention,
In a jacking device for a waste heat recovery boiler B in a power plant that moves to a work position after passing through a space S with a narrow height and is removed after passing through the same space S, it is installed on a gantry 1 during work A method for disassembling the hydraulic jack 6 and a support block 9 provided on the hydraulic jack 6 and supporting the boiler B on the upper part after the work is completed so that the narrow space S can be passed when the device is removed. After the installation work of the boiler B is completed, the upper portions of the four support legs 22 with the casters 23 housed in the low position on the pedestal 1 are fixed near the four corners of the support block 9, and both side edges of the pedestal 1 are fixed. The caster 23 is rolled up to pull out the support block 9 to bring it to a predetermined accommodation position of the gantry 1, and the head rotating jack 26 is installed in the lower center of the support block 9 to support the support block 9. After the support, and the support block 9
After removing the support legs 22 with the casters 23 from the support block 9 and rotating the support block 9 by 90 degrees about the head rotation jack 26, the support jack 9 is unloaded at the lower four corners of the support block 9.
After installing 27 and supporting the support block 9, the head rotation jack 26 is pulled out from under the support block 9 to be housed in a low position on the pedestal 1, and the unloading jack 27 is lowered to move the support block 9 up. The suspension beam 28 is placed between the upper portions of the four support legs 22 with the casters 23, which are accommodated in a low position on the pedestal 1 and then removed from the support block 9 first.
The hydraulic jack 6 is suspended from the suspension beam 28, the casters 23 are moved in the same manner as described above to bring the hydraulic jack 6 to a predetermined accommodation position on the gantry 1, and the unloading jack 27 previously used. The support leg 22 with the casters 23 is detached from the hydraulic jack 6 and is accommodated in a low position on the gantry 1 while the hydraulic jack 6 is being supported by, and the unloading jack 27 is lowered to move the hydraulic jack 6 to the low position on the gantry 1. To be housed in.

(Operation) In the present invention, after the installation work of the boiler B is completed, the hydraulic jack 6 and the support block 9 are arranged so that the jacking device can be removed through a space having a small height.
And are disassembled and housed in a low position on the gantry 1. In the disassembling work, first, the support legs 22 with the casters 23 are attached so that the support blocks 9 can be easily moved to a predetermined accommodation position, and the support blocks 9 are moved while rolling the casters 23. Stand 1
Bring it to the upper storage position. And head rotating jack
After supporting the support block 9 by arranging 26 at the lower center of the support block 9, the support leg 22 with the casters 23 is removed from the support block 9, and the support block 9 is rotated 90 degrees about the head rotation jack 26. On the pedestal 1 and then the lower part 4 of the support block 9
After mounting the unloading jack 27 at the corner to support the support block 9, the head rotating jack 26 is pulled out from under the support block 9 to be housed in a low position on the gantry 1, and the unloading jack 27 is lowered. Support block 9 to stand 1
The suspension beam 28 is erected between the upper portions of the four support legs 22 with the casters 23 previously removed from the support block 9, and the hydraulic jack 6 is suspended from the suspension beam 28. , The caster 23 is rolled in the same manner as described above to bring the hydraulic jack 6 to a predetermined accommodation position on the pedestal 1, and the hydraulic jack 6 is supported by the unloading jack 27 used previously, and the support legs with the caster 23 are provided. 22 is removed from the hydraulic jack 6 and is housed in the low position on the gantry 1, and the unloading jack 27 is lowered to house the hydraulic jack 6 in the low position on the gantry 1. If all the components and seals are housed in the low position on the gantry 1 in this way, the jacking device can be removed without difficulty through a space having a small height (Example) FIGS. 1 to 12 An example of the present invention is shown in FIG. 1 is a front view of the jacking device, FIG. 2 is a plan view of the jacking device, FIG. 3 is a side view of the jacking device, FIG. 4 is a plan view of a boiler installation site, and FIG. 5 is a boiler. Fig. 6 is a perspective view of the installation block, Fig. 6 is a perspective view of the support block with supporting legs attached, and Fig. 7 is a front view of the support block supported by the head rotation jack and the temporary receiving block. Fig. 9 is a plan view of the same, Fig. 9 is a front view of a support block supported by an unloading jack, Fig. 10 is a perspective view of a hydraulic jack hung on a support leg, and Fig. 11 is a pedestal of each component. It is a top view which shows the accommodation state above.

In the jacking device of the present invention, a pair of members work together to push up the boiler B. The jacking device is carried in and fixed to the lower part of a predetermined boiler installation position in a state in which nothing is mounted on the gantry 1, and after the boiler installation work is completed. It will be removed in the same condition. The pair of jacking devices are the same and can be disassembled from each other, but they are not assembled at first, but for convenience of explanation, first, the jacking device in a state where the assembly is completed will be described with reference to the drawings.

The cradle 1 of the jacking device comprises a pair of H-shaped steels 2 which are parallel to each other in a longitudinal direction, and both sides of the H-shaped steels 2 are connected to each other by a lateral beam 3 to form a bottom steel number 4. A caster 5 is attached near the outer ends of the H-shaped steel 2 so as to be vertically adjustable. A hydraulic jack 6 is attached to the center of the cross beam 3, and a tubular lifting guide member 7 is attached to the H-shaped steel 2 on both sides of the hydraulic jack 6. The hydraulic jack 6 is provided with a tubular support nut 8 with a handle 8a on the outside, and the vertical position can be adjusted by holding and rotating the handle 8a. A support block 9 supporting the bottom of the boiler B is placed on the hydraulic jack 6, and tubular corresponding guide members 10 attached to both lower sides of the support block 9 are vertically movable up and down by the elevating guide member 7. It is fitted. The outer surfaces of the two support blocks 9 located on both sides of the gantry 1 are connected to each other by connecting members 11. Further, on the outer side of the H-shaped steel 2, a large number of scaffolding plates 18 provided with handrails 17 of downward folding type are attached. Reference numeral 19 in the figure denotes a manual hydraulic pump for sending oil to the hydraulic jack 6.

The horizontal guide device 12 is a pair of mounts used for installation work.
It is provided on the horizontal beams 52 of the supporting frame located on both sides of 15. This horizontal guide device 12 is provided with two screw rods 14 and 15 which are orthogonal to each other on a support base 13, and each screw rod 14 and 15 is provided with a rotating handle 14a and 15a.

Next, a method of installing the waste heat recovery boiler B between the support frames 51, 51 using the above jacking device will be described.

First, the receiving beams 53 are horizontally attached to the lower portions of the horizontal beams 52 facing each other of the supporting frame 51, and the insertion space S on the gantry 1 is formed between them. Then, the rail 16 is passed between the receiving beams 53, 53 of the adjacent supporting frames, the pedestal 5 of the pedestal 1 is placed on the rail 16, and the pedestal 1 is inserted from the insertion space S while rolling to receive the receiving beams 53, 53.
Raise the caster 5 while passing it in between, and receive the platform 1 to receive the beams 53, 53
Make it support above. During this time, no other components are attached to the gantry 1, and the gantry 1 passes through the insertion space S having a small height without colliding with the horizontal beam 52 without difficulty.

In the illustrated embodiment, three support frames are arranged in a row, and two boilers B are installed between these support frames 51, 51. In the installation work of the boiler B, two jacking devices are used to lift the boiler B from below, so the rails 16 are installed on both sides of the support frame 51, and after installing the boiler B in one support frame 51, 51, the other. Support frame of 51,51
The jacking device is moved along the rail 16 in order to install the boiler B on the rail.

Then, as described above, the receiving beams 53, 53 on both sides of the gantry 1 are
After mounting on the top, the frame 1 is fixed to the beam 53 by the clamp 20. Next, the hydraulic jack 6 housed on the pedestal 1 so as not to collide with the horizontal beam 51 is moved to and fixed at the center of the lateral beam 3 of the pedestal 1 by a crane or the like.
The lifting guide member 7 stored on the hydraulic jack 6
Are moved vertically to stand on both sides, and the corresponding guide member 10 is fitted to the outside thereof. Then, similarly, the support block 9 stored on the pedestal 1 is placed on the hydraulic jack 6, both support blocks 9 are connected by the connecting member 11, and the upper end of the corresponding guide member 10 is attached to the lower part of each support block 9. Fix it. Separately from this, scaffold plates 18 stored on the pedestal 1 so as not to collide with the horizontal beams 51 are horizontally installed on both side edges of the pedestal 1 to secure a working space, and similarly, the pedestal 1
The horizontal guide device 12 housed above is installed on the horizontal beams 52, 52 on both sides, and then, while the boiler B is suspended right above the support block 9, one screw rod of the horizontal guide device 12 is installed. Rotate 14 to contact the side surface of boiler B at a right angle, and rotate other screw rods to rotate boiler B.
Auxiliary bracket projecting at right angles to the other side
Abut on 21 at a right angle to determine the horizontal position of boiler B. Next, the hydraulic jack 6 is operated to push up the boiler B to a predetermined height position and fix the boiler B. This completes the installation of one boiler B.

After the installation of the boiler B is completed, the jacking device must be disassembled, removed from the lower part of the boiler, and moved to the next boiler installation position if necessary. Therefore, a method of disassembling the jacking device will be described next. First, the support block 9 is removed from the pedestal 1, and in order to move the support block 9 to a predetermined accommodation place on the pedestal 1, the connecting material 11 is detached from the support block 9 and accommodated on the pedestal 1, and both sides of the support block 9 are removed. Attach support legs 22 to. The support leg 22 is provided with casters 23 that can roll on the H-shaped steel 2 on both sides of the pedestal, and is provided with guide pins 24 that are adjacent to the casters 23 and extend downward. Then, after lowering the hydraulic jack 9 to support the support block 9 on the support leg 22, the lifting guide member 7 is removed from the pedestal 1 and the corresponding guide member 10 is removed from the support block 9 to lower positions on the pedestal 1, respectively. To house. Next, the casters 23 are rolled to pull out the support blocks 9 and move them to a predetermined accommodation position. At this time, the guide pins 24 are fitted inside the H-shaped steel 2 so that the casters 23 do not come off during running. I will guide you through the run. After moving the support block 9 to a predetermined position, the head rotating jack 26 housed on the pedestal 1 is installed at the center lower part of the support block 9 to support the support block 9, After arranging the temporary receiving block 25 on the pedestal 1, the head rotation jack 26 is lowered and the support block 9 is temporarily placed on the temporary receiving block 25, and the support legs 22 with the casters 23 are removed from the support block 9. Next, while the support block 9 is supported by the head rotation jack 26, the support block 9 is rotated 90 degrees around the head rotation jack 26 and is arranged in the passing direction of the gantry 1, and the four corners of the support block 9 are arranged. After mounting the unloading jack 27 on the lower part to support the support block 9, the head rotating jack 26 is pulled out from under the support block 9 and placed on the pedestal 1. Store in place. In the illustrated embodiment, the unloading jack 27 is inserted in the lower portion of the supporting jig 31 fixed to the side surface of the support block 9. Next, the unloading jack 27 is lowered to accommodate the support block 9 in the low position on the gantry 1, and then the unloading jack
Remove 27.

Then, the suspension beam 28 is installed between the upper portions of the support legs 22 with the casters 23, which are previously removed from the support block 9, and the suspension beams 28 are installed on the hydraulic jack 6. A pair of hoisting rods 29 penetrate vertically through the hoisting beam 28, and the vertical position can be adjusted by a nut, and the lower end of the hoisting bracket can be locked to the handle 8a of the hydraulic jack 6. Is equipped with. Then, it is locked to the handle 8a of the lifting bracket hydraulic jack 6 and the nut of the lifting rod 29 is turned to lift the hydraulic jack 6.
It is moved on the gantry 1 by the support legs 22 with the casters 23 and brought to a predetermined accommodation position. Then, the supporting legs 22 with the casters 23 are removed in a state where the lifting beam 28 is supported by the unloading jack 27, and the supporting legs 22 are accommodated in a low position on the gantry 1 and the unloading jack
27 is lowered to house the hydraulic jack 6 in a low position on the gantry 1.

Next, the scaffolding plate 18 is removed from the gantry 1 and the clamp metal fitting 20 is removed to be housed in a predetermined position on the gantry 1.

Thus, after disassembling all the parts that obstruct the passage of the gantry 1 when passing through the cradle insertion space S and storing them in a low position on the gantry 1, the casters 5 are projected downward to mount the gantry 1 on the rails 16. To surface. Then, the gantry 1 is moved along the rails 16, removed from the bottom of the installed boiler B, and brought to the installation position of another boiler B. Then, the same work as above is repeated to install another boiler B.

Incidentally, FIG. 12 shows a state in which each part is accommodated on the gantry 1.

(Effect of the Invention) As described above, in the present invention, the space S having a narrow height is used.
Move to the work position after passing through the same space S after the work is completed.
Waste heat recovery boiler B at a power plant that is removed after passing through
In this jacking device, a hydraulic jack 6 installed on the pedestal 1 during work, and a support block 9 provided on the hydraulic jack 6 and supporting the boiler B on the upper part thereof.
After the work is completed, disassemble and place the device in the narrow space S
And a caster housed in a low position on the gantry 1 after the installation work of the boiler B is completed.
The upper portions of the four support legs 22 with 23 are fixed near the four corners of the support block 9, and the casters are placed on both side edges of the pedestal 1.
After rolling the support block 9 out of the support block 9 by rolling the support block 9 out of the support block 9, the head rotation jack 26 is installed in the lower center of the support block 9 to support the support block 9, and then the support block 9 is supported. After removing the support leg 22 with the casters 23 from the block 9 and rotating the support block 9 by 90 degrees around the head rotation jack 26, install the unloading jacks 27 at the lower four corners of the support block 9. After supporting the support block 9, the head rotating jack 26
Of the support block 9 is housed in the low position on the gantry 1, and the loading jack 27 is lowered to house the support block 9 in the low position on the gantry 1 and then removed from the support block 9 first. The suspension beam 28 is installed between the upper portions of the four support legs 22 with the casters 23, and the hydraulic jack 6 is suspended from the suspension beam 28, and the casters 23 are moved in the same manner as described above to mount the hydraulic jack 6 on the mount 1. The unloading jack that was brought to the specified storage position above and used earlier
With the hydraulic jack 6 supported by 27, the support legs 22 with the casters 23 are detached from the hydraulic jack 6 and housed in a low position on the gantry 1, and the unloading jack 27 is lowered to place the hydraulic jack 6 on the gantry 1. Since it is stored in the position, all the components can be disassembled with the minimum tools, they can be moved to the predetermined position safely and securely, and they can be easily stored in the low position on the pedestal 15, and the height is narrow. There is an effect that the jacking device can be removed without difficulty after passing through the space S.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a front view of a jacking device, FIG. 2 is a plan view of the jacking device, FIG. 3 is a side view of the jacking device, and FIG. Fig. 5 is a plan view of the boiler installation site, Fig. 5 is a perspective view of the boiler installation site, Fig. 6 is a perspective view of the support block with supporting legs attached, and Fig. 7 is a head rotating jack and a temporary receiving block. Front view of the support block supported by
Fig. 9 is a plan view of the same, Fig. 9 is a front view of a support block supported by an unloading jack, Fig. 10 is a perspective view of a hydraulic jack hung on a support leg, and Fig. 11 is a pedestal of each component. It is a top view which shows the accommodation state above. 1 ... Stand, 6 ... Hydraulic jack, 9 ... Support block, 22 ... Support legs, 23 ... Casters, 26 ... Head rotating jack, 27 ... Unloading jack, 28 ... Hanging beam, B
…… Waste heat recovery boiler, S …… space.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiyoshi Maehara 2703 Nakaokamoto, Kawachi-cho, Kawachi-gun, Tochigi Sanwa Tech Co., Ltd. Utsunomiya Plant (72) Inventor Shunsuke Nakanishi 2703 Nakaokamoto, Kawauchi-cho, Tochigi Prefecture Sanwa Tekki Co., Ltd. Utsunomiya Factory

Claims (3)

[Claims] 1. A jacking device for a waste heat recovery boiler in a power plant, which moves to a work position after passing through a space having a small height and is then removed through the same space after the work is completed, on a pedestal during work. A method of disassembling a hydraulic jack installed on the hydraulic jack and a support block provided on the hydraulic jack and supporting the boiler at an upper part thereof to allow passage through the narrow space when the device is removed. After the installation position is completed, the upper parts of the four support legs with casters that were housed in the low position on the pedestal were fixed to the four corners of the support block, and the casters were rolled on both side edges of the pedestal to support. Pull out the block, bring it to the specified storage position on the gantry, install the head rotation jack in the lower center of the support block to support the support block, and then Said detach the casters support leg, after the support blocks around the head rotation jack is 90 degrees rotation, after supporting the support block by installing unloading jacks at the bottom four corners of the support block from,
The head rotating jack is pulled out from under the support block to be housed in the low position on the gantry, and the unloading jack is lowered to house the support block in the low position on the gantry, and then removed from the support block first. A suspension beam is installed between the upper parts of the four support legs with casters,
While suspending the hydraulic jack on the suspension beam, moving the casters in the same manner as above to bring the hydraulic jack to a predetermined accommodation position on the frame, and with the hydraulic jack supported by the previously used unloading jack. A method for disassembling a jacking device, characterized in that a support leg with casters is removed from a hydraulic jack to be housed in a low position on a gantry, and a unloading jack is lowered to house the hydraulic jack in a low position on the gantry. 2. The four support legs with casters are provided at their lower ends with guide pins projecting downward, and these guide pins are attached to the inside of the frame edge so that the support legs do not drop from the frame edge. The method for disassembling a jacking device according to claim (1), characterized in that the method is for blocking. 3. A suspension beam is made to pass vertically through a plurality of lifting rods, nuts are screwed onto the upper threaded portions of the lifting rods, and a bracket at the bottom of the lifting rods is hooked on the handle of the hydraulic jack. The method for disassembling a jacking device according to claim (1), wherein the nut is tightened to lift the lifting rod to lift and support the hydraulic jack.