JP4397476B2 - How to repair the intermediate body of the vertical container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of repairing a part of an intermediate body portion of a vertical container such as an existing coke drum.
[0002]
[Prior art]
Conventionally, as a method of repairing an old coke drum (first type pressure vessel) by replacing the old part (about 40 tons) with a new one (ie, a new part) due to corrosion or the like, the following method is used. This method is generally adopted.
(1) After dismantling the existing upper frame, the old part of the coke drum is carried out from the upper part by a crane as an integral part, and the new part is carried in the reverse manner in the same manner and fixed by welding.
(2) Lay rails or rollers on the existing frame, carry out the old part side by side with a winch, etc., and carry the new part in the same way in the reverse way, and fix it by welding.
(3) Divide the body into several parts, cut and remove each part in a strip shape, and carry new parts into the removed parts each time and fix them by welding.
[0003]
[Problems to be solved by the invention]
However, the conventional method for repairing the intermediate body portion of the vertical container still has the following problems to be solved.
In (1), in order to dismantle the upper existing frame, it is necessary to restore the upper existing frame after replacement of the old part, and to lift the old part from the upper part as a single unit with a crane. A large crane was required, and the work to be carried out for this purpose could be dangerous.
In (2), in order to attach a winch or the like to an existing frame, it is necessary to reinforce the existing frame depending on the weight of the part to be carried out or carried in. Since the work is carried out with rollers, workability is inferior. As a result, the work period becomes longer and a dangerous work may be forced.
In (3), each part is cut into a strip shape and the part is welded. Therefore, the amount of welding at the site increases compared to the case of a single piece, resulting in an increase in welding work and a considerably longer construction period. At the same time, there is a problem that the risk of quality assurance by welding greatly increases.
[0004]
This invention is made | formed in view of such a situation, and it aims at providing the repair method of the intermediate | middle trunk | drum of a vertical container which can shorten a construction period, can improve safety | security, and can ensure quality.
[0005]
[Means for Solving the Problems]
The method for repairing the intermediate body portion of the vertical container according to the present invention in accordance with the above object is to replace the old part by cutting and removing the old part to be repaired from the intermediate body part of the vertical container disposed on the frame. This is a method for repairing the intermediate body of a vertical container that carries in and repairs a new part on the ground, in order to transport the old part from the installation position to the temporary placement position and to carry the new part from the temporary placement position to the installation position. A pair of left and right traveling rails that pass through the outer sides of the saddle-shaped container and lay on each side of the auxiliary container, and a plurality of small dollies that can be moved up and down on the traveling rail are arranged in advance. After attaching the number of auxiliary brackets corresponding to the small dolly to the aging part on the side corresponding to the traveling rail, and placing the aging part on multiple small dollies via the auxiliary bracket, On the ground by a hoist Next, the newly installed part with another auxiliary bracket is mounted on the small dolly by lifting it with a lifting machine and mounted on multiple small dollies in the temporary placement position. Transport to the installation position and weld and fix the remaining vertical container. As a result, the old part and the newly installed part can be carried out or carried in as a single unit without cutting the strip into a strip shape, without disassembling the upper existing frame, and without reinforcing the existing frame.
[0006]
In the method for repairing the intermediate body portion of the vertical container according to the present invention, the auxiliary frame can be installed separately from the frame, thereby making it possible to omit the modification work of the frame.
In the method for repairing the intermediate body portion of the vertical container according to the present invention, support members for connecting a plurality of small dollies respectively traveling on the left and right traveling rails are provided, the left and right auxiliary bracket groups of the aged portion, and the newly installed portion The left and right auxiliary bracket groups can also be mounted. Thereby, the load of the old part or the newly installed part on the small dolly can be more uniformly distributed.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
FIG. 1 is an overall front view of an intermediate barrel repair facility used in the method for repairing an intermediate barrel portion of a vertical container according to an embodiment of the present invention, and FIG. 2 is an intermediate barrel portion of the same bowl type container. FIG. 3 is an overall side view of the intermediate body repair equipment used for the repair method of the intermediate body of the same type container, and FIG. 4 is the same type container. FIG. 5 is a front view of the first small dolly used in the method for repairing the intermediate body of the same type container, and FIG. 6 is a front view of the same type container. It is a side view of the 1st small dolly used for the repair method of the intermediate | middle trunk | drum.
[0008]
As shown in FIG. 1, an intermediate body repair facility 10 used in a method for repairing an intermediate body part of a vertical container according to an embodiment of the present invention is constructed on a foundation 12 that protrudes from the ground 11. Aged portion 15 (indicated by hatching) to be repaired of the coke drum 14 which is an example of a bowl-shaped container placed on the constructed frame 13 is cut from the intermediate body portion 16 and carried out of the frame 13, and the aged portion This is a facility for carrying in and replacing a newly installed portion (not shown, but substantially the same structure as the aging portion 15) on the ground in place of 15 in the frame 13. In the present embodiment, as shown in FIG. 3, the case where the old portions 15 and 15 a of the two coke drums 14 and 14 a arranged in the frame 13 are handled is shown. Since 14a has the same configuration, only the coke drum 14 will be described, and the coke drum 14a will be denoted by the same reference numeral with the letter a and will not be described.
[0009]
As shown in FIGS. 1 to 3, the intermediate body repair facility 10 is provided at a level of the aging part 15 of the coke drum 14 having a circular cross section, and is temporarily installed from the installation position A in the frame 13 to the outside of the frame 13. A pair of traveling rails 17 and 18 capable of carrying out the aging part 15 are provided at the placement position B. As shown in FIG. 3, the traveling rails 17 and 18 pass through both outer sides of the coke drum 14, and the inner rails 19 and 20 constituting the traveling rails 17 and 18 on the frame 13 side are installed on the foundation 12. 13 is attached to upper ends of rail support legs 21 to 23 as an example of a pair of auxiliary mounts provided separately from 13 via mounting brackets 24 to 26. The outer rails 27 and 27a constituting the running rails 17 and 18 outside the frame 13 are attached to the upper ends of the rail support legs 28 of the truss structure which is an example of the auxiliary frame which is a pair provided on the ground 11. Yes. As shown in FIG. 2, the outer rails 27 and 27a and the inner rails 19 and 20 are connected by a flange joint.
[0010]
As shown in FIGS. 2 and 3, a pair of traveling devices 29 that can travel on the pair of traveling rails 17 and 18 are provided, and the traveling devices 29 are arranged at intervals in the traveling direction. Two first small dollies 30 and one second small dolly 31 arranged in the center between the two first small dollies 30 are provided. Each traveling device 29 is provided with a support member 46 that connects the upper parts of two first small dollies 30 and one second small dolly 31 and supports the left and right sides of the aging part 15. It has been.
[0011]
As shown in FIGS. 4 to 6, the first small dolly 30, which is a component of the traveling device 29, includes two driving wheels 32 and 32 a that roll on the traveling rails 17 and 18, a driving wheel 32, A rectangular loading platform 33 to which 32a is attached; four driven wheels 34 and 35 which are provided at four corners of the loading platform 33 and roll on the traveling rails 17 and 18; The raising / lowering / mounting table 36 is provided. Each of the drive wheels 32 and 32a is provided with traveling means, and the traveling means includes a drive force transmission mechanism (not shown) such as a gear and a bearing provided with an output shaft of a motor 37 with a speed reducer attached to the lower portion of the loading platform 33. It is comprised so that the drive wheels 32 and 32a may be rotated through (not shown). The driven wheels 34 and 35 are not provided with a drive source, and are attached to the loading platform 33 via bearings.
[0012]
The elevating / mounting table 36 can be moved up and down by elevating means, and the elevating means has a driving force transmission mechanism (not shown) such as a worm gear or the like on the output shaft of the motor 38 with a speed reducer attached to the lower part of the cargo bed 33 shown in FIG. ) And a bearing (not shown). As shown in FIG. 4, a number of bolt holes 39 are formed on the upper surface of the elevating / mounting table 36 in order to fix the support member 46 with bolts and nuts.
The second small dolly 31 has a larger allowable load load than the first small dolly 30, but the description is omitted because it is structurally the same as the first small dolly 30.
[0013]
Bolt holes (not shown) corresponding to the bolt holes 39 are formed on the lower surface of the support member 46 placed on the raising / lowering / mounting table 36 of the first small dolly 30 and the second small dolly 31. Yes. As shown in FIG. 2, a plurality of reinforcing plates 40 are provided in the vertical direction in the vicinity of the mounting position of the first small dolly 30 or the second small dolly 31 on the support member 46. As shown in FIGS. 2 and 3, on the side wall corresponding to the running rails 17 and 18 of the aging part 15, the upper position of the elevating / mounting table 36 of the first small dolly 30 or the second small dolly 31. In addition, a number of auxiliary brackets 41 and 42 corresponding to the first and second small dollies 30 and 31 that can be placed on the upper surface of the support member 46 are fixed by welding. Therefore, an auxiliary bracket group is constituted by one auxiliary bracket 41 and two auxiliary brackets 42 on the same side of the aging part 15 (or a newly installed part), and each side of the aging part 15 (or a newly installed part) is auxiliary. The bracket group will be welded.
[0014]
As shown in FIG. 1, the aging portion 15 mounted on the traveling device 29 disposed at the temporary placement position B is operated by an operator operating a tow crane 43 that is an example of a lifting machine disposed on the ground 11. 11 can be lowered. In addition, an auxiliary bracket (auxiliary bracket group) similar to the auxiliary brackets 41 and 42 of the aging part 15 is welded in advance to a new part (not shown) arranged on the ground instead of the aging part 15, and is lifted by the tow crane 43. Can be mounted on the traveling device 29 arranged at the temporary placement position B. As described above, the intermediate trunk portion repair facility 10 includes the tow crane 43, the traveling device 29, and the traveling rails 17 and 18.
[0015]
Next, the work performed using the repairing equipment 10 for the intermediate body will be described for the method for repairing the intermediate body of the vertical container according to the embodiment of the present invention.
(Preliminary work)
(1) Of the intermediate drum portion 16 of the coke drum 14, the aging portion 15 is determined based on the investigation results such as corrosion, and a new portion (including left and right auxiliary bracket groups) that replaces the aging portion 15 is manufactured.
(2) The specifications of the traveling device 29 and the specifications of the traveling rails 17 and 18 based on the weight, position (height) of the aging part 15, the capacity, the number, and the arrangement of the first and second small dollies 30, 31 The specifications of the rail support legs 21 to 23 and the rail support legs 28, the specifications of the support member 46, the specifications of the auxiliary brackets 41 and 42, etc. are determined and manufactured.
[0016]
(3) The traveling rails 17 and 18 are installed on the site via the rail support legs 21 to 23 and the rail support leg 28, and the tow crane 43 is arranged on the site.
(4) Auxiliary brackets 41 and 42 (left and right auxiliary bracket groups) are welded in advance to the aged portion 15 on the side corresponding to the left and right traveling rails 17 and 18.
(Cutting and unloading the old part 15)
(5) After the small dollies 30 and 31 are lifted by the tow crane 43 and placed on the travel rails 17 and 18 at the temporary placement position B, the small dollies 30 and 31 are connected by the support member 46 to form a pair of travel devices 29. To do.
(6) The traveling means of the traveling device 29 is driven to move to the installation position A in the frame 13 and stopped. At this time, a slight gap is provided between the lower surfaces of the auxiliary brackets 41 and 42 and the upper surface of the support member 46. Thereafter, the elevating means of the traveling device 29 is driven to raise the support member 46 so as to lightly contact the lower surfaces of the auxiliary brackets 41 and 42.
[0017]
(7) A required number of chain blocks (not shown) having the required capacity are attached to the frame 13 above the coke drum 14, and the coke drum 14 above the aged portion 15 is held by the chain block.
(8) The intermediate body portion 16 of the coke drum 14 is cut along the upper cutting line 44 of the aging portion 15. Even after cutting, the coke drum above the upper cutting line 44 is held by the chain block.
(9) Cut the lower intermediate body section cut along the upper cutting line 44 along the lower cutting line 45 of the aging part 15.
[0018]
(10) The upper trunk 16b (coke drum above the upper cutting line 44) cut by the upper cutting line 44 above the old part 15 is lifted by a chain block, and its lower end surface and the upper end surface of the old part 15 A gap is provided between
(11) The upper trunk part in which the upper and lower surfaces of the aging part 15 are lifted up by driving the lifting means provided in the small dollies 30 and 31 constituting the pair of traveling devices 29 to slightly raise the aging part 15. The lower end surface of the aging portion 15 is not contacted with the upper end surface of the lower trunk portion 16c while being fixed to the foundation.
(12) As shown in FIG. 1, after the traveling device 29 is driven on the traveling rails 17 and 18 at the temporary placement position B by driving the traveling means, the aged portion 15 is lifted by the tow crane 43 and the ground 11 Take it down.
[0019]
(Transportation / repair work of the new department)
(13) The new part that has been manufactured and placed on the ground 11 is lifted by the tow crane 43 and mounted on the traveling device 29 in a state where the aging part 15 is lowered.
(14) The travel device 29 is traveled, moved to the installation position A in the frame 13 and stopped.
(15) Driving the elevating means of the traveling device 29 to slightly lower the newly installed portion, and the gap between the lower end surface of the newly installed portion and the upper end surface of the lower trunk portion 16c that is fixed to the foundation is a gap necessary for welding Position to have
(16) The lower end portion of the newly installed portion and the upper end portion of the lower trunk portion 16c that is fixed to the foundation are welded.
[0020]
(17) The upper trunk portion 16b that is lifted and held by the chain block is lowered and positioned so that the gap between the lower end surface and the upper end surface of the new portion has a gap necessary for welding.
(18) The upper end portion of the new portion and the lower end portion of the upper trunk portion 16b held by the chain block are welded. As a result, the old part 15 of the coke drum 11 is replaced and repaired by the new part.
(19) The lifting and lowering means of the traveling device 29 is driven to slightly lower the support member 46 of the traveling device 29, so that a slight gap is provided between the lower surface of each auxiliary bracket 41, 42 and the upper surface of the support member 46. Then, the traveling device 29 is moved to the temporary placement position B and stopped.
(20) The traveling device 29 is lifted by the tow crane 43 while being disassembled into the support member 46 and the small dollies 30 and 31 and lowered to the ground 11.
[0021]
In the above embodiment, the traveling rails 17 and 18 and the rail supporting legs 21 to 23 and the rail supporting legs 28 that support the traveling rails 17 and 18 have been described as being installed during repair work. However, it may be always provided. Alternatively, only the inner rails 19 and 20 in the frame 13 and the rail support legs 21 to 23 that support the inner rails 19 and 20 are always provided, and the outer rails 27 and 27a and the outer rails 27 and 27a outside the frame 13 are provided. The rail support legs 28 to be supported may be installed during repair work. In addition, although the traveling rails 17 and 18 and the rail supporting legs 21 to 23 and the rail supporting legs 28 that support the traveling rails 17 and 18 have been described as being manufactured during repair work, the frame 13 and the coke drum 11 are installed. Sometimes it can be installed.
The traveling rails 17 and 18 are supported by the rail support legs 21 to 23 fixed to the foundation 12 and the rail support legs 28 fixed to the ground 11, but depending on the situation, the rail supports provided on the frame 13 are supported. The inner rails 19 and 20 can be supported by rail support legs provided on the frame 13, and the outer rails 27 and 27 a are supported by rail support legs installed separately from the frame 13. You can also
[0022]
In the work steps (6), (11), (15) and (19), the elevating means of the traveling device 29 is used. However, the elevating means is not limited to this. For example, when the capacity is insufficient, the elevating means is provided. Instead of this, another jack means can be set on the traveling device and used.
In (7), (8), (10), (17) and (18) of the work process, the chain block is attached to the frame 13 and used. For example, when the strength of the frame 13 is insufficient, It can also be hung by the tow crane 43.
Support members 46 are provided to connect the upper portions of the small dollies 30 and 31 traveling on the left and right traveling rails 17 and 18, and the load of the aging part 15 is evenly distributed to the small dollies 30 and 31 by this support member 46 as much as possible. However, without using the support member 46, the load of the aging part 15 can be directly applied to the elevating / mounting table 36 of the small dollies 30 and 31 through the auxiliary brackets 41 and 42.
The traveling device 29 uses two types of small dollies 30 and 31 having different capacities, but is not limited to this, and one type or three or more types of small dollies can also be used. As the small dollies 30 and 31, existing ones or new ones can be used.
[0023]
【The invention's effect】
In the repair method of the intermediate body part of the vertical container according to claims 1 to 3, the old part or the new part is not cut into a strip shape as in the prior art, and the upper existing frame is not dismantled. Since it is possible to carry out or carry in an old part or a new part as an integral object without reinforcing the existing frame, the welding amount is reduced, and as a result, quality is ensured and the construction period is shortened, and , Safety is also improved.
In particular, in the method for repairing the intermediate body portion of the vertical container according to claim 2, the work for remodeling the frame can be omitted, so that the construction period is further shortened.
In the method for repairing the intermediate body portion of the vertical container according to claim 3, since the load of the aged part or the newly installed part can be more uniformly distributed to a plurality of small dollies, the small dollies can be made compact and lightweight. This can reduce the cost of repair work.
[Brief description of the drawings]
FIG. 1 is an overall front view of an intermediate barrel repair facility used in a method for repairing an intermediate barrel of a vertical container according to an embodiment of the present invention.
FIG. 2 is a front view of an essential part of repair equipment for an intermediate body used in the method for repairing the intermediate body of the same container.
FIG. 3 is an overall side view of an intermediate barrel repair facility used in the method for repairing an intermediate barrel of the same container.
FIG. 4 is a plan view of a first small dolly used in a method for repairing an intermediate body portion of the same container.
FIG. 5 is a front view of a first small dolly used in a method for repairing an intermediate body portion of the same container.
FIG. 6 is a side view of a first small dolly used in the method for repairing an intermediate body portion of the same container.
[Explanation of symbols]
10: Repair equipment for the middle torso, 11: Ground, 12: Foundation, 13: Frame, 14, 14a: Coke drum, 15, 15a: Old part, 16, 16a: Middle torso, 16b: Upper torso, 16c : Lower trunk, 17, 17a: Traveling rail, 18, 18a: Traveling rail, 19, 20: Inner rail, 21, 22: Rail support legs (auxiliary mount), 23, 23a: Rail support legs (auxiliary mount) ), 24, 25, 26: mounting bracket, 27, 27a: outer rail, 28: rail support leg (auxiliary mount), 29: traveling device, 30: first small dolly, 31: second small dolly, 32, 32a: Driving wheel, 33: Loading platform, 34, 35: Driven wheel, 36: Lifting / mounting table, 37: Motor with reduction gear, 38: Motor with reduction gear, 39: Bolt hole, 40: Reinforcement plate, 41 42, 42a: Auxiliary bracket 43: Tow crane (crane), 44, 44a: upper cut line, 45, 45a: lower cut line, 46, 46a: support member

Claims (3)

The middle torso of a saddle type container that is repaired by cutting and removing an old part to be repaired from the middle torso of a saddle type container placed on a frame, and carrying in a new part on the ground in place of the old part A repair method,
An auxiliary frame is provided for transporting the aging part from the installation position to the temporary placement position and carrying out the new installation part from the temporary placement position to the installation position, and passes on both sides of the vertical container on the auxiliary frame. A pair of left and right traveling rails are laid, and a plurality of small dollies that can be moved up and down are arranged on the traveling rails, and the small dollies are accommodated in the old part on the side corresponding to the left and right traveling rails in advance. A number of auxiliary brackets are attached, and the aging part is placed on the plurality of small dollies via the auxiliary brackets and is taken out to the temporary placement position. At the mounting position on the dolly, the newly installed portion provided with another auxiliary bracket is lifted by the lifting machine and mounted on the plurality of small dollies at the temporary storage position, Conveying a plurality of said new portion with small dollies in the installation position, remaining vertical repairing method of the intermediate body portion of the container, characterized in that welded to the vertical vessel. 2. The method for repairing an intermediate body portion of a vertical container according to claim 1, wherein the auxiliary frame is installed separately from the frame. 3. The method for repairing an intermediate body portion of a vertical container according to claim 1 or 2, wherein a support member for connecting the plurality of small dollies respectively traveling on the left and right traveling rails is provided, and left and right assistance of the aging portion. A method for repairing an intermediate body portion of a vertical container, wherein a bracket group and other auxiliary bracket groups on the left and right sides of the newly installed portion are respectively placed.

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