JPH0157222B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology belongs to the field of technology in which a membrane panel as an inner tank of a low temperature tank is attached and fixed to a cooler in an outer tank.

<Summary of the gist> The invention of this application is to package a set number of membrane panel block units that are pre-fabricated to a predetermined size at a factory, place them in a temporary storage area of a tank, and suspend them into the tank from there. A method for installing a membrane panel for a low-temperature tank, which is suspended along the cold insulation material on the side plate of the tank, fixed to anchor metal fittings that have been planted in advance on the cold insulation material of the side plate, and continuously welded, and an installation that is directly used in this method. This invention relates to jigs, and in particular, membrane panel blocks suspended inside a tank are clamped one by one to an installation jig made of a frame approximately the same size as the membrane panels, and are integrally held, and the upper end of the side plate is It is hoisted up via a wire by a hoist crane installed on the guide rail, centered and positioned at a predetermined height, and fixed by an installation device with a gondola-type work surface.The clamp to the installation jig is released and the installation jig is completed. This invention relates to a method for installing a membrane panel for a low-temperature tank in which only the components are suspended, and an installation jig that is directly used in the installation method.

<Prior art> As is well known, in low-temperature tanks for LPG-LNG storage, it is common practice to attach a membrane panel that can freely behave thermally inside the outer tank via a cold insulator. Since the membrane panel usually has a complicated corrugation, for example, a predetermined number of membrane panel blocks of a rectangular set size are hung, welded together, and fixed to the cold insulation material inside the side plate. It is made to be.

In this case, installing a work floor for installing the membrane panel on the side plate through the cold insulation material is easy to install because it is a so-called mounted type, but compared to this, Directly attaching a membrane panel block of a predetermined size requires a lot of troublesome work in carrying in, lifting, lifting, and fixing operations because the membrane panel block is attached in a vertical position. It is generally accompanied by

Conventionally, such work has been separated into individual processes that are not related to each other. For example, membrane panel blocks are transported by crane to a temporary storage area outside near the tank. Then, using a crawler crane, etc., temporarily store the package again in the temporary packaging storage area inside the tank side plate, unpack it there, and move it to each divided construction site using a forklift, etc., and then use a crawler crane, etc. It was lifted up and attached to the inner surface of the cold insulation material.

<Problem to be solved by the invention> Therefore, the construction procedure in each step is time-consuming and extremely inefficient, and in addition, it is difficult to unpack each membrane panel block in a temporary packaging storage area. In the process of lifting membrane panel blocks one by one using a crawler crane, the membrane panel blocks, which were temporarily placed in a substantially flat state at the temporary packaging storage area, are lifted by the crawler crane, which causes the membrane panel block to change from its initial flat state to a slanted state. As the membrane panel block is then lifted into a vertical position, it is inevitable that bending stress will be applied to the membrane panel block midway through the process.

In other words, membrane panel blocks are manufactured as large as possible for construction efficiency and to avoid welding heat stress when welding them together in the subsequent process, so they require a considerable area and weight. Therefore, in the process of transitioning from a horizontal position to a tilted position to a vertical position, a lifting force is applied to the point of application on the upper end side of the membrane panel block; The gravity acting on the lower end side applies a large bending stress to the entire membrane panel block, especially near the center of gravity. There is a disadvantage that bending deformation occurs, and it is very difficult to correct such bending deformation while attached to the side plate.Moreover, the work requires skill, and
There was a problem that it required a lot of man-hours and could be dangerous.

In addition, when attaching and fixing the side plates of the membrane panel block to the cold insulation material, it is recommended to follow the process of attaching from the top to the bottom for safety and convenience of post-processing. Normally, in order to solve the above problem, a guide rail is provided along the circumferential direction of the upper end of the side plate, a hoist crane is movably provided on the guide rail, and a working gondola is connected to the hoist crane via a wire. Techniques for suspending construction, such as the technique disclosed in Japanese Patent Application Laid-open No. 57-155478, have also been developed, but as mentioned above, membrane panel blocks require considerable size, area, and weight. Because of the large weight of the membrane panel block, it is difficult to lift the top membrane panel block and secure it to the anchor hardware that has been buried in the cold insulation material on the side plate. The hoist crane used to lift the membrane panel block is also quite large, and therefore, at the final stage where the membrane panel block is hoisted to the top stage, the upper end of the membrane panel block and the hoist crane interfere, causing the membrane panel to become a cold insulator. I had the inconvenience of not being able to install it.

Furthermore, interference between the gondola and the membrane panel block being lifted is unavoidable, and due to these technical constraints, it is extremely impossible to attach and secure the top membrane panel block to the side plate cold insulation material. I had a feeling that this was the case.

In the above-mentioned invention disclosed in JP-A No. 57-155478, a gondola is set against a membrane panel block provided on a transport vehicle at the bottom of the tank, and the membrane panel block and the gondola are raised along the cold insulation material. However, as mentioned above, each unit of membrane panel block is quite heavy, so there are problems such as distortion of the membrane panel block and damage due to interference when replacing it in the gondola. In addition, hoist cranes and trolleys are heavy in order to lift the membrane panel blocks together with the gondolas, requiring large scale and large amounts of power.In addition, maintenance, inspection, etc. are cumbersome, and the initial assembly of the trolleys and hoist cranes is of course difficult. In addition, the inconvenience of difficulty in dissociation in subsequent steps is unavoidable.

In addition, from this point of view, each step of attaching and fixing the membrane panel blocks to the cold insulation material of the side plate is often extremely dangerous as described above, and as the number of panels increases and the number of steps increases, The disadvantage was that as the capacity of the tank increased, the degree of danger also increased.

Furthermore, the membrane panel stores the cryogenic liquid directly inside the container shape for the tank itself, as well as its corrugation.
The surrounding area also needs to be precisely processed and the state after processing needs to be maintained, but in order to lift and fix the membrane panel block to the inner surface of the cold insulation material of the side plate, conventionally, a crawler crane or hoist crane was used at the tip of the membrane panel block. It is necessary to attach a hanging piece, etc., which may cause deformation or damage to the surrounding area of the corrugation, which poses an undesirable problem of interfering with operation after completion.

As mentioned above, for example, even if a guide rail is provided at the upper end of the side plate and the membrane panel block is hoisted by a hoist crane,
Although the gondola used for this operation is a temporary structure, it has a complex structure, with two rows of guide rails inside and outside to avoid interference due to relative rise with the membrane panel block, as described above. However, it also had the disadvantage of high cost.

<Objective of the Invention> The object of the invention of this application is to solve the technical problem of attaching and fixing a membrane panel block to the cold insulation material on the inner surface of the side plate of a low-temperature tank based on the above-mentioned prior art, and to In the process after the membrane panel block is suspended, the membrane panel block is reliably and efficiently installed to the set height without damaging or deforming the membrane panel block. The storage technology in the energy industry has been improved by making it possible to lift the membrane panel onto the cold insulation material by lifting it up using a refrigerant, and by making it possible to reuse the installation jig repeatedly, improving safety, and making it possible to reliably install the membrane panel on the cold insulation material. It is an object of the present invention to provide an excellent method and jig for installing a membrane panel of a low temperature tank that is useful for various fields of application.

<Means/effects for solving the problem> In order to solve the above-mentioned problem, the invention of this application, which is based on the above-mentioned claims, is based on a membrane panel that is pre-fabricated to a preset size at a factory. A set number of block units are packaged and hung at a set location in the tank, unpacked, and integrally clamped via a clamper to a membrane panel installation jig made of a frame.
It is transported to the base of the lower side of the tank side plate via a receiving truck, a support truck, etc., and lifted from the base by a hoist crane installed on a guide rail provided at the upper end of the tank side plate. Even when the integrally held membrane panel block is lifted from a horizontal position to an inclined position and then to a vertical position, its rigidity is sufficiently maintained by the installation jig in the frame state, and the design shape is not deformed in any way. The spacer of the gondola-type installation device allows the gondola-type installation device to pass smoothly between the installation device and the cold insulation material without interfering with the cold insulation material due to the rollers, and therefore maintains the shape as initially formed. It is maintained and hoisted to a predetermined height along the cold insulating material, and is centered with respect to the cold insulating material by being operated by an installation device such as a gondola type that goes up and down via a hanging device also provided on the guide rail. It is temporarily attached to the anchor metal fittings that have been planted in advance on the cold insulation material, and then the clamper group that is integrally provided on the installation jig is released and only the installation jig is lowered to install the next membrane panel block. It is a technical measure designed to serve the needs of the public.

<Example> Next, an example of the invention of this application will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, 1 is LNG, LPG
This is a flat-bottomed cylindrical dome-roof low temperature tank of a general form for storage, and the dome roof is provided with a hanging deck 2, and in the illustrated embodiment, a side plate on the periphery of a bottom plate 3 on which no membrane panel is laid. A cold insulating material 5 is attached and fixed to the inner surface of the cold insulating material 5 via a gondola 6 for installing the cold insulating material, and membrane panel blocks 7', 7', . . . The membrane panels 7 are attached and connected next to each other, and a frame type installation jig 8 and a gondola type installation device 9 are used to attach and fix the membrane panels 7. As these jigs, a receiving cart 10 and a supporting cart 11 are made movable on the bottom plate 3 for use.

Note that 12 is a pump barrel that is vertically installed at the inner corner of the tank 1.

Now, to explain in detail how the membrane panel blocks 7' of the invention of this application are sequentially installed on the surface inside the cold insulating material 5, the mode shown in FIG. 3 is a partial front view of a membrane panel 7, which has a large set area and a large weight as shown in FIG. Each membrane panel block 7' is formed in advance at the factory into a rectangular unit with an area of a predetermined size in accordance with the design, and each block has a mutually twill-like appearance on the surface. Holes 14, 14 for fixing anchor metal fittings (not shown), which have been buried and implanted in advance in the corrugation 13 intersecting with the cold insulation material 5 of the side plate 4, are bored in the flat part between the corrugations 13, 13. be.

Then, each unitized membrane panel block 7' is stacked in a predetermined number and packed, transported by truck or the like, and transported to a temporary storage site for tank construction as described later.

The installation work of the membrane panel block 7' on the cold insulation material 5 according to the invention of this application will be explained with reference to FIG. 4. The unitized membrane panel block 7' is shown in FIG. ) are clamped and fixed one by one to the installation jig 8,
It is suspended via a wire from a hoist crane 16 as a main lifting device movably mounted on one guide rail 15 provided in an annular manner between the top of the side plate 4 and the periphery of the hanging deck 2. A gondola-type installation device 9 is mounted on the guide rail 15 and suspended via a wire by hanging devices 17, 17 provided before and after the setting position of the hoist crane 16. The membrane panel block 7' is attached and fixed to the cold insulation material 5 from the upper stage through the middle stage to the lower stage by operation from the installation work floor.
Furthermore, the membrane panel 7 is moved in the circumferential direction for each work area so that the membrane panel 7 is attached to the entire circumference of the surface of the cold insulating material 5.

To further explain each major mechanism and device, first, as shown in Figures 5, 6, and 7, for the hoist crane 16 that suspends the installation jig 8, there is a A motor 19 is mounted on a frame 18 that is mounted via rollers (not shown) on a guide rail 15 that is circumferentially provided around the periphery.
is fixedly installed and equipped with a hoist crane main body 20, and a cable 22 for suspending a controller 21 shown in FIG. At the same time, there is a hook 23 for the installation jig 8 that clamps and suspends the membrane panel block 7' at its tip.
A wire 24 having a diameter is wound around the wire 24.

The hoist crane 16 has a pair of subframes 26, 26 integrally connected to each other via connecting fittings 25, 25 at the front and rear of the guide rail 15, and each subframe 26 is equipped with a motor. 27 is attached, and a chain block 29 is attached to the cantilever type bracket 28 at a portion offset a set distance from the guide rail 15 to the side plate 4 side, and an installation jig for holding the membrane panel block 7' is attached at the tip of the chain block 29. A wire 31 having a hook 30 for the tool 8 is made to be able to move up and down.

As shown in FIG. 7, the subframe 26 has rollers 32 for each upper surface of both lower flanges of the guide rail 15 and rollers 33 for the entire width of the lower surface of the flanges. The cantilever type bracket 28 prevents the chain block 29 from wobbling or tilting during operation.

On the other hand, as shown in FIGS. 8, 9, and 10, a gondola type installation device 9 is suspended from hanging devices 17, 17 as shown in FIG. Wire 3
The frame is suspended from 4 and 34 and can be raised and lowered freely, and the frame is integrated into two upper and lower stages, with an upper horizontal work floor and a lower vertical work floor that follows it, and each upper and lower work floor. The work surfaces 35, 35' are made to be accessible to workers by means of a ladder 36.

Further, as shown in FIG. 10, on the upper work surface 35, each push rod 38 is provided so as to be movable forward and backward relative to the cold insulation material 5 of the side plate 4 via a ball screw mechanism (not shown) by each motor 37 on both sides. A pair of pad-type negative pressure suction devices 40, 40 connected via a hose to an appropriate negative pressure generating device 39 provided on one side of the work surface 35 integrally sandwich the membrane panel block 7'. It is provided as an expandable spacer for relatively passing the installation jig 8 between the installation device 9 and the side plate 4. It is provided opposite to the cold insulation material 5 of No. 4.

Therefore, the side plate 4 between the left and right push rods 38, 38
The horizontal width in the direction along is made smaller than the horizontal width of the installation jig 8, and the installation jig 8 is pressed against the cold insulation material 5 surface by each of the push rods 38 as described later,
Also, the length of the negative pressure suction devices 40, 40 is determined by the installation jig 8.
It is sufficiently longer than the thickness of the mounting jig 8, and its width in the direction along the side plate 4 is larger than the width of the installation jig 8, so that the installation device can be passed through the installation jig 8 relatively.

Furthermore, 42 and 42' are safety nets, which are surrounded by the upper parts of the upper and lower work surfaces 35 and 35', and are designed to allow workers to perform necessary work and to protect their safety. , and 43 is an opening/closing lid, which is provided approximately at the center of the upper work surface 35, and is provided so that a worker can enter and exit between the upper and lower work surfaces 35, 35'.

What is shown in FIG. 11 is an installation jig 8 that holds the membrane panel block 7', which has been prefabricated in a factory and made into a unit as described above, and raises it along the cold insulation material 5. , the size of the membrane panel block 7' in plan view is
Therefore, it has a rectangular shape like the membrane panel block 7' shown in FIG. The frame is integrally welded into a frame shape, and the tips of its four corners (only two are shown for convenience of illustration) are tilted at a set angle, and the frame is held together by a predetermined spring mechanism (not shown). Rollers 46 and 46 are provided so as to be folded flat on the same plane as the plane formed by the rollers 44 and 45 and extend and retract in the longitudinal direction so as not to damage the cold insulation material surface of the side plate 4.

Therefore, since each roller 46 is folded in the longitudinal direction, it does not protrude laterally, and therefore, as will be described later, the membrane panel block 7' can be held between the membrane panel blocks 7' and the work surface 35 of the gondola-type installation device 9. When relatively passing between the cold insulating material 5 of the side plate 4, the push rods 38, 38 in the retracted state and the negative pressure suction devices 40, 40 are prevented from interfering with each other.

Also, the frames 4 on both sides of the installation jig 8 in the vertical direction
As shown in FIG. 12, intermediate rollers 47, 47, 47 are provided at predetermined portions of 4, 44, and are provided with round holes 48 of the vertical frame 44 and horizontal rollers integrally welded to the vertical frame 44. A crank-shaped arm inserted into a round hole 50 of a holder bracket 49 that is welded and fixed to the frame 45 and extends parallel to the vertical frame 44 has a stopper flange 51 at its base end. A shank 52 having a rectangular cross section is formed to be inserted into the round hole 48 of the vertical frame 44, and is engaged with a disc spring 53 provided in the vertical frame 44 to switch between the downward and horizontal orientations. Further, a roller main body 55 is rotatably supported at the tip of a right-angled elbow portion 54 at the tip of the shank 52.

Therefore, when the intermediate roller 47 is manually bent downward at right angles from the state shown in FIGS. When the roller body 55 is bent into a hanging position like the rollers 46 and 46, the horizontal position is maintained by the spring 53 by bending it to a horizontal position, and the roller main body 55 is bent in the direction of the arrow along the horizontal frame 45. By pushing in, the elbow portion 54 and the roller main body 55 are housed in the vertical frame 44 having a U-shaped cross section, and the size of the installation jig 8 in the width direction is substantially reduced in the same way as the rollers 46 and 46 described above. Therefore, when the installation jig 8 passes relatively between the gondola type installation device 9 and the cold insulation material 5 while holding the membrane panel block 7', the push rods 38, 38 and the spacer It does not interfere with the negative pressure suction devices 40, 40, and can pass through smoothly.

Furthermore, as shown in FIG. 11, a pair of frames 4 are provided vertically at the center of the installation jig 8.
Between 4 and 4 are arms 58, 5 whose one end is pivotally supported by a pin 56 and whose tip is hooked to a hook 57 and can be detached.
8... are provided so as to be able to pivot 90 degrees left and right through the pins 56, and in the open state are installed perpendicularly to the vertical frames 44, 44 and between the hooks 57, In the closed state, one pin 5
As shown in FIGS.
Hollow bolt 61 as a clamper whose tightening state is adjusted with respect to 8 and can be freely raised and lowered and fixed.
has a handle 62 integrally formed with a knurl on the outer periphery at its lower end, and is provided opposite to the fixing hole 14 bored in the flat part between the corrugations 13, 13 of the membrane panel block 7'. In the internal hole 64 of the hollow bolt 61, there is a first hole.
As shown in FIG. 4, a forked fork 66 is attached to the hollow bolt 61 with a pin 65 pivotally supported at the upper end thereof, and each of the forked forks 66 serves as a clamp that engages with the lower surface of the fixing hole 14 at the tip thereof. It has stoppers 67, 67 in a flange shape and is provided in the center thereof,
An adjustment handle 69 is provided on a male screw shaft 68 that is screwed into a female screw (not shown) provided on the fork 66, and is manually rotated through a window 70 provided in the middle of the hollow bolt 61 to adjust each stopper 67 of the fork 66. The fixing hole 14 can be freely adjusted to expand or contract.

Therefore, by adjusting the adjustment handle 69, the fork 66 is closed away from the stopper 67, 6.
7 together so that the hollow bolt 61 comes out from the fixing hole 14, and by rotating the knurled handle 62, the lock nut 5 is removed.
By lifting the hollow bolt 61 from the arm 58 through the holes 9 and 60, the stoppers 67 and 67 can be extracted from the fixing holes 14 of the membrane panel block 7' and removed from the upper surface thereof.

Then, by pivoting the arm 58 around the pin 56 in parallel to the vertical frame 44 and storing it, the membrane can be mounted while the installation jig 8 is held between the membrane panel blocks 7'. hole 14 for fixing panel block 7';
14... can be exposed and tack welding to the anchor hardware provided on the cold insulation material can be performed.

Then, by performing the reverse operation to that described above, as shown in FIG. 14, the fork 66 can be inserted into the fixing hole 14, and each stopper 67 can be used to clamp it to the membrane panel block 7'. I can do it.

Note that 71 is another lock nut.

As shown in FIGS. 11 and 15, clamping of the membrane panel block 7' around the installation jig 8 is done by attaching bolts 72 to the upper flanges of the frames 44 and 45. The seat 73 is screwed, another clamper 74 is provided on the seat 73, and the length of the long groove 75 of the U-shaped bracket 76, which has a long groove 75 perpendicular to the frames 44, 45, is fixed. The corrugation 13 of the membrane panel block 7' is formed by forming a rubber lining on the lower side 77, which has a shorter length than that of the membrane panel block 7'.
Insert it underhang on the back side of the.

In this state, a set gap is formed between the seat 73 and the bracket 76.

A tightening bolt 78 is integrally planted and extended near the seat 73 of the bracket 76, and the clamper 74 is inserted between the seats 79, 79.
The fork portion 80 of the clamper body is inserted.

When the handle 81 is pushed down in this state, the seat 7
3 is lowered, the gap between the seat 73 and the bracket 76 is eliminated, and the bolt 78 is tightened through the fork part 80.
is raised, with the lower part 77 of the bracket 76 inserted into the lower surface of the corrugation 13 of the membrane panel block 7', and as a result, the bracket 76 is pressed against the frames 44, 45 and the membrane panel block 7' is clamped. will be done.

To release this, the handle 81 is rotated in the opposite direction to raise the tightening bolt 78, thereby creating a gap 82 between the seat 73 and the bracket 76 again, and moving the bracket 76 outward in the left direction in FIG. By sliding the bracket 76 through the long groove 75 and pulling it out via the bolt 72, the lower part 77 of the bracket 76 is detached from the membrane panel block 7', and in this state, the membrane panel block 7 is suspended in a vertical position. ', the bracket 76 runs approximately parallel to the frames 44, 45 due to gravity rotation relative to the bolt 72, and the push rods 38, 38 on the work surface 35 of the gondola type installation device 9, the negative pressure suction device 40, 40
interference with the membrane panel block 7' is substantially avoided, and smooth passage between the cold insulation material 5 and the installation device 9 of the membrane panel block 7' is achieved.

The attachment and fixing of the membrane panel block 7' to the inside of the side plate 4 using the above-mentioned device will be explained with reference to the drawings from FIG. 16 onwards.
In order to sequentially attach and fix the membrane panel blocks 7', 7'..., mark the left, right, top and bottom for centering on the cold insulation material 5 of the side plate 4 by surveying.
Also, a gondola type installation device 9 is used.

Centering markings 83..., 83'... are also made on the membrane panel block 7'.

Of course, in this case, it is assumed that anchor metal fittings (not shown) for fixing holes 14 of the membrane panel block 7' are embedded in the cold insulation material 5.

Next, as shown in FIG. 17, a set number of membrane panel blocks 7', which have been prefabricated in a factory to a predetermined size as described above, are packed and accumulated in temporary storage areas 83, 83 at the construction site of the tank 1. Temporarily placed.

In addition, the work on the packed membrane panel block 7' on the bottom plate 3 in the tank 1 is performed on the side plate 4 of the tank 1, as shown in FIGS. 17 and 18.
The packaging materials are carried in through predetermined openings 84, 84, and placed in temporary packaging storage areas 85, 85', etc.

In this way, as shown in FIG.
Opening 8 of roof 88 of tank for forklift 86, trolley 87, etc. carried into bottom plate 3 inside
A packing material 91 containing a predetermined number of membrane panel blocks 7' is lifted onto the trolley 87 by a crawler crane 90 via a forklift 86, and moved to temporary storage areas 85, 85 near the opening 84, where it is , as shown in FIG.
Then, the plates 92, 92 are unpacked, and a set number of membrane panel blocks 7' are taken out.

Therefore, as shown in FIG. 21, the installation jig 8 is suspended and moved by the chain blocks 94, 94, etc. using the gate structure 93 with rollers, and is mounted on the membrane panel block 7' group. The installation jig 8 is placed and set on the uppermost membrane panel block 7' via the chain blocks 94, 94, . . . so that their peripheral parts are aligned.

Therefore, as shown in FIG. 22, as mentioned above,
As shown in Figures 11, 13, 14, and 15, each hollow bolt 61, clamper 74, etc. are used to clamp the membrane panel block 7', and the installation jig 8 is used to attach the topmost membrane panel. The block 7' is clamped and integrated, and the gate structure 93 is moved there.
As shown in FIG. 23, the central part of the carriage 10
The end portion is placed on the support cart 11.

In this state, the rollers 46, 47, . . . around the installation jig 8 are projected downward and bent to be in a hanging state.

Therefore, as shown in FIG. 24, the receiving cart 10,
The installation jig 8 holding the membrane panel block 7' on the support cart 11 is moved to the lower side of the attachment part in the vertical direction of the predetermined construction area, and the installation jig 8 is suspended from the hoist crane 16 of the guide rail 15 at the tip of the installation jig 8. The lifting hooks are hooked and connected to the hooks 23 of the wires 24 that are connected to each other.

Thus, the hoist crane 16 is stopped at a predetermined position on the guide rail 15, and is suspended via a wire from other hanging devices 17, 17, which are also stopped on the guide rail 15. 2
The hoist crane 16 is actuated through the operation of the stage work surface installation device 9, and its wire 24
When it is pulled up, the installation jig 8 holding the membrane panel block 7' moves up at its leading end and begins to tilt with its lower end supported by the support cart 11, as shown in FIG.

Therefore, the receiving cart 10 is moved to the temporary storage area 85 via its rollers for the next preparation.

When the hoist crane 16 continues to operate, the installation jig 8 becomes parallel to the cold insulation material 5 of the side plate 4 and is successively lifted up, as shown in FIG. .

Therefore, since the lower end of the installation jig 8 separates from the support cart 11, the support cart 11 also moves to the temporary storage area 8.
Let's move it to 5.

At this time, as shown in FIG. 24, the tip of the installation jig 8 rises and the lower end approaches the side plate 4, so a kind of rotational moment acts, and the lower roller 47 moves toward the side plate 4. Although it is light, a worker 96 should press the lower part of the installation jig 8 and gently shake it, as shown in FIG. The installation jig 8 is assisted in rising while restraining the movement of the installation jig 8.

The attachment and fixing of the membrane panel block 7' to the cold insulating material 5 in this manner is carried out in the order shown by the circle numbers as shown in FIG. 27.

Therefore, when attaching and fixing the first membrane panel block 7' on the uppermost stage to the cold insulating material 5, the negative pressure generating device is activated by operating the work surface 35 on the upper stage of the gondola type installation jig 9. 39 is activated to fix the negative pressure suction device 40 as a spacer on the cold insulation material 5 surface of the side plate 4, and as shown in FIGS. 28 and 24, the installation device 9 is kept at a constant distance from the cold insulation material 5. By the continuous operation of the hoist crane 16, the installation jig 8 is lifted up while holding the membrane panel block 7', and approaches the hoist crane 16 as shown in FIG.

However, in this state, the membrane panel block 7' has not yet reached its design height, so it is necessary to reassemble it, so the hoist crane 16 is stopped and the membrane panel blocks 7' on both sides are 29, 29 are operated on the installation device 9 to lower the wires 31, 31 and hook them to other prepared hooks of the installation jig 8, thereby releasing the hoist crane 16 from the hooks.

When the rearrangement is completed in this way and the chain blocks 29, 29 are operated, the chain blocks 29, 29 are moved to the cantilever with respect to the guide rail 15, as shown in FIG. 6, as shown in FIG. Since the installation jig 8 is offset from the side plate 4 through the bracket 28, the installation jig 8 is pulled up close to the inner surface of the cold insulation material 5.

At this time, the installation jig 8 relatively passes between the installation device 9 and the cold insulation material 5 of the side plate 4, but at this time, the negative pressure suction devices 40, 40 of the installation device 9 In order to maintain a sufficient gap between the device 9 and the cold insulating material 5 of the side plate 4, the installation jig 8 is smoothly lifted up through the gap.

In the process of the installation jig 8 rising relative to the installation device 9, the operator 96 in the installation device 9 will see that the installation jig 8 In the process of rising relative to The clamp on the membrane panel block 7' is released from above to make the arm 58 parallel to the frame 44, and all the fixing holes 14, 14, . . . of the membrane panel block 7' are exposed.

By doing this, as shown in FIG.
9,29 will be temporarily stopped.

Therefore, the left and right motors 37, 37 on the upper working surface 35 of the installation device 9 are operated to push out the push rods 38, 38 via the worm mechanism, and the push rods 38, 38 are pushed out, and the push rods 38, 38 are installed with a width narrower than the width of the membrane panel block 7'. By doing so, while lightly pressing the membrane panel block 7' against the inner surface of the cold insulation material 5 of the side plate 4, the installation device 9 is moved up and down slightly, and the vertical and horizontal markings made on the cold insulation material 5 of the side plate 4 are adjusted. Marks 83 and 83' formed in the area corresponding to the membrane panel block 7' are placed in the 32nd position.
Align as shown.

At this time, if the inclination of the membrane panel block 7' or the vertical or horizontal posture is uncertain, centering is ensured by independent operation of the hanging devices 17, 17.

In this case, the installation device 9 as shown in FIG.
Because the shape is horizontal in the upper row and vertical in the lower row, 3-point centering can be performed automatically by centering the left and right markings in the upper row and centering the lower writing in the lower row. As a result, centering of all stages can be performed.

When the centering is completed in this way, as shown in FIG. 33, in this state, bolts temporarily fixed to anchor metal fittings (not shown) buried in the cold insulation material 5 are inserted into each of the fixing holes 14, 14... Insert the minimum required number of nuts 98, 98 and temporarily tighten them.

In this case, if necessary, the installation device 9 is raised to perform upward alignment, as shown in FIG.

In this way, as shown in FIG. 35, the uppermost membrane panel block 7' can be aligned and temporarily fixed.

Next, the holes 14, 14 for fixing the hollow bolts 61, 61, . Since they are closed, they are all exposed, so temporary welding is performed between the fixing holes 14, 14... and the anchor hardware.

The welding order in this case is as shown in the circle numbers shown in FIG. 36. First, as shown in FIG. and membrane panel block 7' within the allowable range.
Tack welding 100 is performed as shown in FIG.

In this case, the previously temporarily tightened bolts are removed and tack welding 100 is performed in the same manner.

By performing tack welding 100 on all the fixing holes 14, 14... in this way, the membrane panel block 7' is fixed to the side plate 4, requiring suspension by chain blocks 29, 29... I won't.

Therefore, all the remaining clampers 74 for the membrane panel block 7' of the installation jig 8 are sequentially removed and stored in the frames 44 and 45, and the installation jig 8 is suspended and lowered by the reverse process to the above-mentioned process. , placed on the receiving cart 10 and the supporting cart 11 which are kept on standby at the lower end, and moved to the temporary storage area 85 for the next work.

In addition, in the work of attaching and fixing the membrane panel block 7' of the cold insulating material 5 by lifting the membrane panel block 7' of the installation jig 8 of the second and subsequent stages while holding the membrane panel block 7', as described above, the membrane panel block 7 of the uppermost stage is 'Unlike attaching and fixing, the work can be carried out by lifting only with the hoist crane 16. In this case, the lower membrane panel block 7' relative to the upper membrane panel block 7' is welded and joined 101 at its upper and lower ends as shown in FIG. 39. All you have to do is

In addition, as shown in Figure 1, the hanging deck 2 and the bottom plate 3
A pump barrel 12 is suspended vertically between the pump barrel 12 and the side plate 4 or its cold insulating material 5. Due to design conditions, there is not a sufficient gap between the pump barrel 12 and the side plate 4 or its cold insulating material 5. As shown in FIGS. 4, 24, and 25, the wire 24 is removed by a hoist crane 16 from a horizontal state in which the installation jig 8 integrally holding the membrane panel block 7' is supported by the receiving cart 10 and the supporting cart 11. In the step of moving from the tilted state to the lifted state through the pump, the pump barrel 12 may interfere within the triangular area shown in FIG. 24.

In such a case, the pump barrel 1
The hoist crane 16 is moved along the guide rail 15 to areas other than the construction zone order, avoiding the area where 2 is located.
Then, the chain blocks 29, 29 are moved together, and of course, the hanging devices 17, 17 are also moved together, and the gondola type installation device 9 is also moved, as described above, ie, FIGS. 4 and 24. , 25, the installation jig 8 is moved from the horizontal position to the tilted position and then to the vertical lifting state, and then the installation jig 8 is moved along the guide rail 15 to the attached position of the work section in the set order. 8, and an installation jig 8 which moves the installation guide rail 9 in parallel and moves it between the cold insulating material 5 of the side plate 4 and the pump barrel 12, and where it holds and integrates the membrane panel block 7'.
, and also raise and lower the installation device 9 to carry out the attachment fixing work similar to that described above. After releasing the membrane panel block 7' from the installation jig 8, the procedure for hanging the installation jig 8 is repeated again. At a location outside the construction area, the installation jig 8 is placed in a vertical position where it is suspended from the bottom plate 3, changes to an inclined position, and then to a horizontal position, and is transferred to a receiving cart 10, etc. Interference with the pump barrel 12 can be avoided when the pump is placed and moved.

It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned embodiments, and various embodiments can be adopted.

<Effects of the Invention> As described above, according to the invention of this application, after a set number of membrane panel blocks, which are pre-fabricated to a predetermined size at a factory, are packed, hung into a tank, and unpacked, the inner surface of the cold insulation material of the side plate is packed. In the process of attaching and fixing one membrane panel block to the core, the installation jig, which is framed by a frame, is held in place by the installation jig via an integrated clamp, and lifted from transportation. Since it is possible to perform unloading, tacking, etc., workability in each process can be carried out continuously. Therefore, the basic idea is that workability is good, efficiency is increased, and it can be done safely. Excellent effects can be achieved.

Furthermore, since the membrane panel block after being suspended in the tank is always integrated with the installation jig until it is fixed to the cold insulating material, the membrane panel block maintains the predetermined shape created at the factory. Since the rigidity is sufficiently maintained during the attachment process to the cold insulation material, there is no deformation at all, so the accuracy of the tank after construction is good, and it has the excellent effect of increasing reliability. .

This is extremely effective when the membrane panel block is thin, and also has the advantage of improving yield.

In addition, each work can be performed directly on the installation jig via a clamper on the membrane panel block, which not only has the excellent effect of extremely high safety, but also minimizes the need for related equipment such as cargo handling equipment. Therefore, the number of temporary facilities etc. can be reduced as much as possible, and the cost can also be reduced.

In addition, as mentioned above, there are secondary benefits such as improved workability and safety due to fewer cargo handling equipment, temporary facilities, etc.

Furthermore, the installation jig is clamped to the membrane panel block by tightening and releasing the clamp.
Since disassembly can be performed, the installation jig can be used repeatedly,
There are also benefits that can always be used when using a large number of membrane panel blocks in the construction of cryogenic tanks.

In addition, since work can be performed continuously in each process, there is also the advantage that work procedures and construction management can be performed accurately and systematically.

In the installation jig, since a plurality of clampers for the membrane panel block are integrally attached to the frame, each clamper may be separated or separated when not only installing but also releasing the clamper. Since it cannot be lost, it can be easily attached and removed from the membrane panel block, and there is also an effect that there is no disadvantage such as shortage of parts.

In addition, due to the design, the clamps for the frame of the installation jig can be stored between the flanges of the frame, so the installation jig can be lifted up by holding the membrane panel block between the frames. By not interfering with the type of installation equipment, there is an effect that not only lifting but also centering and tacking processes can be performed easily, and high accuracy can also be obtained.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of the low temperature tank of the invention of this application, FIG. 2 is a partial front view of the membrane panel, FIG. 3 is a partial front view of the membrane panel block, and FIG. 4 is a partial front view of the membrane panel block. 5 is a side view of the guide rail lifting device, FIG. 6 is a side view of the same, FIG. 7 is a partial sectional view of the sub-lifting device, FIG. 8 is a perspective view of the gondola, FIG. 10 is a partial side view of the spacer, FIG. 11 is an overall perspective view of the installation jig, FIG. 12 is a partial sectional view of the roller structure, and FIG. 13 is a side view of the clamp at the center of the installation jig. Fig. 14 is a partial sectional view of the same;
Figure 15 is a partial sectional view of the structure of the clamp around the installation jig, Figure 16 is a front view of the membrane panel block, Figure 17 is a plan view of the temporary packaging material storage area, and Figure 18 is the temporary storage area inside the tank. Floor plan of storage area,
Fig. 19 is a side view of the packaging material being hung, Fig. 20 is a perspective view of the packaging material being unpacked, Figs. 21, 22, and 23 are perspective views of the process of installing the installation jig to the membrane panel block, and Figs. 24, 25, and 26. 27 is a side view of the installation jig when it is lifted, and FIGS. 27 to 39 are process diagrams of the attachment and fixation of the membrane panel work floor. 1...Tank, 4...Side plate, 5...Cold insulation material,
7'... Membrane panel block, 8... Installation jig, 9... Installation device, 35, 35'... Work surface,
44, 45...Frame, 46, 55...Roller, 61...Other clampers.

Claims (1)

[Scope of Claims] 1. A method in which a pre-fabricated membrane panel block is lifted along a cold insulating material on a tank side plate and fixed to an anchor metal fitting previously provided on the cold insulating material at a predetermined position. are clamped one by one to an installation jig made of a frame that is approximately the same size as the membrane panel block, and suspended movably from the cold insulation material through the lifting of the installation jig for membrane panel installation work. Positioned and fixed at a set position between the cold insulation material and a gondola-type installation device having at least one surface and a retractable spacer that allows the membrane panel to pass relative to the cold insulation material. Then, the installation device releases the clamp of the membrane panel block from the installation jig, fixes the membrane panel block to the anchor hardware, and suspends and lowers the installation jig for use in lifting the next membrane panel block. A method for installing a membrane panel for a low temperature tank, characterized in that the membrane panel is installed in a low temperature tank. 2. In an installation jig for lifting and fixing a prefabricated membrane panel block along the cold insulating material of the tank side plate, a plurality of frames for integrally fixing the membrane panel to the frame formed along the periphery of the membrane panel block are installed. A low-temperature tank characterized in that a clamper is attached, another clamper is attached to the mounting hole of the membrane panel block for the anchor hardware of the cold insulating material, and a foldable roller for the cold insulating material is attached to the frame. Membrane panel installation jig.