JP3572160B2 - Membrane installation device and membrane installation method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for installing a membrane on the inner wall surface of an LNG underground tank, and a method for installing a membrane using the apparatus.
[0002]
[Prior art]
Conventionally, when a membrane is installed on the inner wall surface of an LNG underground tank or the like, a plurality of unit membranes (two in the horizontal direction and seven in the vertical direction) having bent portions formed at ends are connected by end pieces or the like. A membrane (membrane block) is manufactured at a factory and transported to the site, and is positioned on the inner wall surface of the tank 1 as shown in FIG. 34, and is positioned at the bent portion 201b of the membrane 201 as shown in FIG. The bent portions 202b of the installed membrane 202 are made adjacent to each other, and the bent portions 201b and 202b of the membranes 201 and 202 are fixed with a jig 210 or the like as shown in FIG. The ridges 203 are formed on the membranes 201 and 202 by edge welding of the protruding end portions (top portions). Here, in FIG. 34, 2 is a concrete body, 3 is a side cooling part, 4 is a gas detection tube, 5 is a body plate, 6 is a knuckle ring, 201a is a unit membrane, and 201e is an end piece.
[0003]
In the case of the joint welding, if the dimensions of the membranes 201 and 202 are different and the heights of the protruding ends of the bent portions 201b and 202b do not match, as shown in FIG. By adjusting the bending angle of the bent portion 201b of the installed membrane 201, the heights of the protruding ends of the bent portions 201b and 202b are made to match.
[0004]
[Problems to be solved by the invention]
In the membranes 201 and 202 as described above, since the bent portions 201b and 202b are edge-welded at the time of installation to form the fold 203 as described above, the number of welding locations is very large, and a great deal of labor is required. ing.
[0005]
Therefore, as shown in FIGS. 30 to 32, it is considered to use a membrane (membrane block) 101 in which a large unit membrane 101a having a concave fold 101b is connected by a connection piece 101e or the like. According to such a membrane 101, as shown in FIG. 30, it is positioned with respect to the inner wall surface of the tank 1, and as shown in FIGS. The fold 101b in the direction along the short direction of the membrane 101 (the direction along the horizontal direction) is attached to the fold 102b in the direction along the short direction (the direction along the horizontal direction) of the membrane 102 by a predetermined length (approximately (Approximately 100 mm), they are overlapped and fitted, and only the membranes 101 and 102 need to be welded together. In FIG. 30, 7 is a membrane anchor, 101f is a cap, 102a is a unit membrane, and 101d and 102d are anchor portions in FIG.
[0006]
However, when using the membranes 101 and 102 as described above, due to the manufacturing accuracy error (0.5 mm), when fitting the folds 101b and 102b as described above, the folds 102b of the membrane 102 are used. Not only does the fold 101b of the membrane 101 need to be pushed firmly, but also, as shown in FIG. 33, after the folds 101b and 102b are fitted, the flat plate portion 101c of the membrane 101 does not adhere to the flat plate portion 102c of the membrane 102. There is a possibility that the membranes 101 and 102 cannot be welded and joined together.
[0007]
In view of the above, an object of the present invention is to provide a membrane installation device capable of securely installing a membrane having a concave fold as described above, and a membrane installation method using the device.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a membrane mounting device according to the present invention is configured to convert a first membrane having a concave fold into a second membrane previously mounted in a structure similar to that of the first membrane. A membrane installation device to be installed adjacently, comprising: a frame; fold gripping means provided on the frame, gripping the fold of the first membrane to hold the membrane, and provided on the frame, Positioning means for positioning one membrane at a predetermined installation position, and the first membrane provided on the frame, the first membrane being fitted to the fold of the second membrane so as to fit the fold of the first membrane. A fold pressing means for pressing the fold, and a flat portion of the first membrane provided on the frame to pull the flat portion of the first membrane forward. A flat plate portion pulling means for fitting the fold to the second membrane, provided on the frame, pressing the flat plate portion of the first membrane, and pressing the flat plate portion of the first membrane and the second And a flat plate pressing means for matching the skin with the flat plate of the second membrane.
[0009]
Further, in the membrane installation method according to the present invention using the above-described membrane installation apparatus, the fold of the first membrane is gripped by the fold gripping means to hold the membrane, and the positioning means fixes the membrane to a predetermined position. After being positioned at the position and temporarily welded, the fold of the membrane is pushed into the fold of the second membrane by the fold pressing means, and the flat plate portion of the first membrane is pulled by the flat plate tension means. Performing the skin fitting of the folds of the first membrane and the second membrane, and temporarily welding the folds, and then pressing the flat plate portion of the first membrane with the flat plate portion pressing means, The first membrane and the second membrane are skin-fitted to each other with the flat plate portion, and the flat plate portion is temporarily fixed and welded to thereby form the first membrane. And wherein the mounting the emissions.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a membrane installation device according to the present invention will be described with reference to FIGS. 1 is a plan view showing the overall schematic structure, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG. 1, FIG. 5 is a side view seen from the direction of arrow V in FIG. 4, FIG. 6 is a sectional view taken along line VI-VI in FIG. 1, and FIG. 6, FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 1, FIG. 9 is an extracted enlarged view of arrow IX in FIG. 8, and FIG. It is the side view seen from the arrow X direction. In addition, about the membrane which has the above-mentioned concave fold, LNG underground tank, etc., the code | symbol same as the code | symbol used in the above description is used, and the description is abbreviate | omitted.
[0011]
As shown in FIG. 1, an eye plate 12 is provided at each of four corners of a frame 11 assembled in a lattice so as to have a size substantially equal to the surface of the above-mentioned membrane 101 as a first membrane. . On the frame 11, the fold holding device 20, which is a fold holding means for holding the membrane 101 by holding the fold 101 b of the membrane 101, and the anchor portion 101 d of the membrane 101 are pressed against the membrane anchor 7 of the tank 1. Anchor gripping device 30 as positioning means for positioning the membrane 101 at a predetermined position with respect to the inner wall surface of tank 1, and folds of membrane 101 on folds 102 b of membrane 102, which is a second membrane previously installed. A fold pressing device 40, which is a fold pressing unit that presses and fits 101b, and a flat plate portion tension that pulls the flat plate portion 101c of the membrane 101 to fit the folds 101b and 102b of the membrane 101 and the membrane 102. A flat plate tensioning device 50 as a means, A flat plate pressing device 60, which is a flat plate pressing device for pressing the flat plate portion 101c of the membrane 101 to fit the surface of the flat plate portion 102c between the membrane 101 and the membrane 102, is provided at predetermined positions, respectively. Each of these devices 20, 30, 40, 50, 60 has the following structure.
[0012]
[Fold gripping device 20]
As shown in FIGS. 1 and 2, the fold holding device 20 can slide along the support shaft 21 attached to the frame 11, the guide shaft 22 supported by the support frame 21, and the guide shaft 22. Arm 23 provided on the guide shaft 22 as described above, rotatably supported by the support frame 21 and screwed into one of the grip arms 23 with a right-hand screw, and a left-hand screw with the other grip arm 23. And a rotation handle 25 provided at the base end of the feed screw shaft 24.
[0013]
That is, by turning the rotary handle 25 to rotate the feed screw shaft 24, the pair of gripping arms 23 are moved closer to and away from each other along the guide shaft 22, and the fold 101b of the membrane 101 Can be detachably gripped. In FIG. 1, the left fold gripping device 20 is disposed so as to be able to grip the fold 101 b in a direction along the short direction of the membrane 101, and the right fold gripping device 20 is arranged in the longitudinal direction of the membrane 101. The fold 101b is arranged so as to be able to grip the fold 101b along the direction.
[0014]
[Anchor gripping device 30]
As shown in FIGS. 1 and 3, the anchor gripping device 30 includes a support plate 31 attached to the frame 11, a pantograph-type jack 32 attached to the support plate 31 and extensible, and an attachment to the jack 32. A screw shaft 33 provided, and an anchor grip portion 34 provided at the tip of the screw shaft 33 are provided.
[0015]
That is, by contracting the jack 32, the anchor gripper 34 can press the anchor 101d of the membrane 101 via the screw shaft 33.
[0016]
[Fold pressing device 40]
As shown in FIGS. 1, 4, and 5, the fold pressing device 40 includes a support plate 41 attached to the frame 11, a pantograph-type jack 42 attached to the support plate 41 and extendable, and a jack 42. And a fold engaging member 43 made of resin and having a concave shape attached thereto.
[0017]
That is, by extending the jack 42, the groove 43a of the fold engaging member 43 can be fitted into the fold 101b of the membrane 101 to press the fold 101b.
[0018]
[Plate tensioning device 50]
As shown in FIGS. 1, 6, and 7, the flat plate portion tensioning device 50 includes a support plate 51 attached to the frame 11, a screw shaft 52 screwed and supported by the support plate 51, and a screw shaft 52. A guide shaft 53 fitted on the support plate 51 so as to be slidable along the axial direction of the shaft, an attachment block 54 attached to the tip of the guide shaft 53 and the screw shaft 52, and an attachment block A support rod 55 having a base end attached to 54; a suction cup 56 attached to the tip of the support rod 55; a detachable handle 57 provided near the tip of the support rod 55 to detach the suction cup 56; A rotation handle 58 provided at the base end of the screw shaft 52.
[0019]
That is, by turning the rotary handle 58 to rotate the screw shaft 52, the suction cup 56 can be moved toward and away from the flat plate portion 101c of the membrane 101 via the mounting block 54 and the support rod 55, and the detachable handle 57 can be moved. By operating the suction cup 56, the suction cup 56 can be adsorbed to the flat plate portion 101c or detached from the flat plate portion 101c.
[0020]
[Flat plate pressing device 60]
As shown in FIGS. 1 and 8 to 10, the flat plate portion pressing device 60 includes a support plate 61 attached to the frame 11, a pantograph-type jack 62 attached to the support plate 61, and an expandable and contractible pantograph-type jack 62. , A plurality of rotatable rollers 64 arranged at predetermined intervals on the support beam 63, and a handle 65 connected to a rotation shaft 64a of the roller 64.
[0021]
That is, by extending the jack 62, each roller 64 can be pressed against the flat plate portion 101c of the membrane 101 via the support beam 63, and the roller 64 can be rotated by operating the handle 65. It has become.
[0022]
Next, a membrane installation method using such a membrane installation apparatus will be described with reference to FIGS. 11 to 29 are explanatory diagrams of the procedure.
[0023]
A plurality (6) of the membranes 101 manufactured in the factory are placed in a container horizontally and packed, and as shown in FIG. 11, a plurality of (two-stage) containers 110 are loaded on a trailer 111 by a truck crane 112 and transported to the site. .
[0024]
After being transported to the site, the container 110 is carried into the tank 1 through the opening 8a of the roof 8 of the tank 1 by the truck crane 112 as shown in FIG.
[0025]
As shown in FIG. 13, once the container 110 is temporarily placed on the temporary receiving stand 113 disposed on the bottom 1 a of the tank 1, the container 110 is lifted by the transport device 115 and transported.
[0026]
As shown in FIG. 14, when the transported container 110 is placed on the sleeper 114 near the installation position, the container 110 is unpacked.
[0027]
Subsequently, as shown in FIG. 15, the frame 11 of the above-described membrane installation device 10 is supported by the transport device 115, and the fold gripping device 20 of the installation device 10 and the fold 101 b of the membrane 101 in the container 110 are connected. When the installation device 10 is conveyed onto the container 110 so as to face each other, as shown in FIG. 16, the installation device 10 is gradually lowered, and the fold 101b of the membrane 101 is removed by the fold gripping device 20 of the installation device 10. After grasping (see FIG. 17) and confirming the tightening state of the fold grasping device 20, as shown in FIG. 18, the transport device 115 is operated to lift the installation device 10.
[0028]
When the installation device 10 is lifted, the transfer device 115 is moved to a predetermined installation position on the inner wall surface of the tank 1 as shown in FIG. 19, and the installation device 10 is lowered as shown in FIG. The hook 116a of the two-way hoist that can travel along the inner wall of the frame is hooked on the eye plate 12 on the wall surface of the tank 1 of the frame 11 of the installation device 10 and the eye plate 12 on the other side of the frame 11 is electrically driven. After the hook 117a of the forklift (for 5 tons) 117 is hooked and the installation device 10 is completely supported by the hooks 116a and 117a, the installation device 10 is removed from the transfer device 115 (see FIG. 21).
[0029]
Next, as shown in FIG. 22, the hook 116a of the hoist 116 is wound up while operating the forklift 117 so that the installation device 10 does not collide with the inner wall surface of the tank 1, and the installation device 10 is dropped. When the hook 117 a of the forklift 117 is removed from the eye plate 12 of the installation device 10, an operator comes up on the installation device 10 and the membrane 101 supported by the installation device 10 is moved to a predetermined position on the inner wall surface of the tank 1. The hoist 116 is operated so as to be oriented to the installation position (see FIG. 23).
[0030]
When the membrane 101 is oriented to the predetermined installation position in this way, the anchor gripping device 30 of the installation device 10 is operated as described above, and the anchor 101 d of the membrane 101 is pressed to move the membrane 101 to the predetermined position. After positioning and matching the center reference, the membrane 101 is temporarily fixed and welded.
[0031]
Subsequently, as shown in FIG. 24, by extending the jack 40 of the fold pressing device 40 of the installation device 10, the groove 43a of the fold engaging member 43 is fitted into the fold 101b of the membrane 101, and the fold 101b is The fold 101b is pressed into the fold 102b of the membrane 102 previously installed (five places).
[0032]
Next, the suction cup 56 is brought into contact with the flat plate 101c of the membrane 101 by operating the rotary handle 58 of the flat plate tensioning device 50 of the installation device 10, and the suction cup 56 is moved by operating the detachable handle 57. When the suction is applied to the fold 101b, the rotating handle 58 is operated, and the flat plate portion 101c is pulled through the suction cup 56, so that the skin of the ridge 101b of the membrane 101 and the fold 102b of the membrane 102 are aligned with each other. All of the protruding ends of the fold 101b of the membrane 101 and the fold 102b of the membrane 102 are temporarily fixed (five places) (see FIGS. 25 and 26).
[0033]
After temporarily welding the protruding end portions of the folds 101b and 102b in this manner, the flat plate portion 101c of the membrane 101 is released from the suction by the suction cup 56 by operating the flat plate tensioning device 50 (see FIG. 27). As shown in FIG. 28, the folds 101b and 102b are temporarily fixed and welded while the skins of the flat portions of the folds 101b and 102b are aligned with the jig 118.
[0034]
Subsequently, the jack 62 of the flat plate portion pressing device 60 of the installation device 10 is extended to press the rollers 64 against the flat plate portion 101c of the membrane 101, and the handle 65 is operated to rotate the rollers 64. Then, the flat plate portion 101c of the membrane 101 and the flat plate portion 102c of the membrane 102 are aligned with each other (see FIG. 29), and the fixing of the flat plate portions 101c and 102c is performed, thereby completing the installation of the membrane 101.
[0035]
Therefore, the membranes 101 and 102 having the folds 101b and 102b as described above can be securely welded to each other and installed, so that the number of welding points is smaller than in the case where the membranes 201 and 202 described in the related art described above are used. Therefore, the working efficiency can be greatly improved, and the cost can be greatly reduced.
[0036]
【The invention's effect】
According to the membrane installation device and the membrane installation method of the present invention, even a membrane having a concave fold can be securely welded and installed, so that the number of welding points is reduced as compared with the case where a conventional membrane is used. Thus, the working efficiency can be greatly improved and the cost can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a plan view showing an overall schematic structure of an embodiment of a membrane installation device according to the present invention.
FIG. 2 is a sectional view taken along the line II-II in FIG.
FIG. 3 is a sectional view taken along line III-III in FIG. 1;
FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1;
FIG. 5 is a side view as seen from the direction of arrow V in FIG. 4;
FIG. 6 is a sectional view taken along the line VI-VI in FIG. 1;
FIG. 7 is an enlarged enlarged view of an arrow VII part of FIG. 6;
FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 1;
9 is an extracted enlarged view of an arrow IX part of FIG. 8;
FIG. 10 is a side view as seen from the direction of arrow X in FIG. 8;
FIG. 11 is an explanatory diagram of a work procedure of a membrane installation method according to the present invention.
FIG. 12 is an explanatory diagram of a work procedure following FIG. 11;
FIG. 13 is an explanatory diagram of a work procedure following FIG. 12;
FIG. 14 is an explanatory diagram of a work procedure following FIG. 13;
FIG. 15 is an explanatory diagram of a work procedure following FIG. 14;
FIG. 16 is an explanatory diagram of a work procedure following FIG. 15;
FIG. 17 is an explanatory diagram of a work procedure following FIG. 16;
FIG. 18 is an explanatory diagram of a work procedure following FIG. 17;
FIG. 19 is an explanatory diagram of a work procedure following FIG. 18;
FIG. 20 is an explanatory diagram of a work procedure following FIG. 19;
FIG. 21 is an explanatory diagram of a work procedure following FIG. 20;
FIG. 22 is an explanatory diagram of a work procedure following FIG. 21;
FIG. 23 is an explanatory diagram of a work procedure following FIG. 22;
FIG. 24 is an explanatory diagram of a work procedure following FIG. 23;
FIG. 25 is an explanatory diagram of a work procedure following FIG. 24;
FIG. 26 is an explanatory diagram of a work procedure following FIG. 25;
FIG. 27 is an explanatory diagram of a work procedure following FIG. 26;
FIG. 28 is an explanatory diagram of a work procedure following FIG. 27;
FIG. 29 is an explanatory diagram of a work procedure following FIG. 28;
FIG. 30 is a schematic structural view of a membrane to which a membrane installation device and a membrane installation method according to the present invention are applied.
FIG. 31 is an explanatory view of an arrangement state of the membrane in FIG. 30.
FIG. 32 is an explanatory diagram of a bonded state of the membrane of FIG. 30.
FIG. 33 is an explanatory view of a state where the folds of the membrane of FIG. 30 are superimposed.
FIG. 34 is a schematic structural view of a conventional membrane.
FIG. 35 is an explanatory view of a conventional membrane installation method.
FIG. 36 is an explanatory view of a conventional method for forming a fold of a membrane.
FIG. 37 is an explanatory view of a correction method when a protruding end of a bent portion of a conventional membrane is displaced.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Membrane installation apparatus 11 Frame 12 Eye plate 20 Fold gripping device 21 Support frame 22 Guide shaft 23 Gripping arm 24 Feed screw shaft 25 Rotating handle 30 Anchor gripping device 31 Support plate 32 Jack 33 Screw shaft 34 Anchor gripping part 40 Fold pressing device 41 Support plate 42 Jack 43 Fold engaging device 50 Flat plate tension device 51 Support plate 52 Screw shaft 53 Guide shaft 54 Mounting block 55 Support rod 56 Suction cup 57 Detachable handle 58 Rotating handle 60 Flat plate pressing device 61 Support plate 62 Jack 63 Support beam 64 Roller 65 Handle 101, 102 Membrane 101a, 102b Unit membrane 101b, 102b Fold 101c, 102c Flat plate 101d, 102d Anchor

Claims (2)

A membrane mounting device for mounting a first membrane having a concave fold, adjacent to a previously installed second membrane in a structure similar to the first membrane,
Frame and
Fold gripping means provided on the frame, for gripping the fold of the first membrane and holding the membrane;
Positioning means provided on the frame, for positioning the first membrane at a predetermined installation position,
Fold pressing means provided on the frame and pressing the fold of the first membrane so as to fit the fold of the first membrane to the fold of the second membrane;
Provided on the frame, a flat plate portion pulling means for pulling the flat plate portion of the first membrane to match the folds of the first membrane and the second membrane,
A flat plate portion pressing means provided on the frame, for pressing the flat plate portion of the first membrane to match the flat plate portion of the first membrane with the flat plate portion of the second membrane. A membrane installation device characterized by comprising: A membrane installation method using the membrane installation device according to claim 1, wherein the fold of the first membrane is gripped by the fold gripping means, the membrane is held, and the membrane is predetermined by the positioning means. After temporarily welding by positioning at the position, the fold of the membrane is pushed into the fold of the second membrane by the fold pressing means, and the flat portion of the first membrane is pressed by the flat portion pulling means. Pull, perform skin matching of the folds of the first membrane and the second membrane, and after temporarily welding the folds, press the flat plate portion of the first membrane with the flat plate pressing means. The first membrane and the second membrane are skinned with each other, and the first membrane is temporarily fixed and welded to the first membrane. Membrane installation method characterized by mounting the.

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