JP3182664B2 - Strong wheel structure of tank with spiral side plate peripheral joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical cylindrical tank for storing low-temperature or normal-temperature liquids, and more particularly to a structure of a strong ring provided on a side plate in which a side plate peripheral joint of the vertical cylindrical tank is formed in a spiral shape. Things.

[0002]

2. Description of the Related Art Generally, a side plate of a vertical cylindrical tank is constructed by a brick-laying method in which a rectangular flat plate having a predetermined curvature is sequentially stacked from bottom to top and assembled into a cylindrical shape and welded and joined. First of all, it is assembled into a cylindrical shape by the brickwork method and welded and joined, and while spirally winding up the uppermost side plate, side plates of a rectangular flat plate having a predetermined curvature are sequentially added from the bottom and at a low height work place It is assembled using a helical method or a spiral method that can be safely assembled into a cylindrical shape and welded (see Japanese Patent Publication No. 2-57183). FIG.
As shown in the above, in the vertical cylindrical tank 1 assembled by a helical construction method or a spiral construction method while winding up the uppermost side plate in a spiral shape, the side plate peripheral joint 3 is formed in a spiral shape. The general vertical cylindrical tank 1 is provided with a strengthening wheel for reinforcing the side plate and an intermediate strengthening wheel (hereinafter collectively referred to as a strengthening wheel 4) so as not to be deformed even when subjected to external pressure such as wind or internal pressure such as air shrinkage in the tank. (Referred to as JIS B) is wound horizontally around the outer peripheral surface or inner peripheral surface of the side plate 2 and attached thereto.
8501-1985, "Structure of Steel Oil Storage Tank").

Incidentally, the side plate peripheral joint 3 assembled by the helical method, the spiral method or the like has a helical shape, and the strengthening wheel 4 is wound around the side plate 2 horizontally for mounting. Mounting welded part is side plate peripheral joint 3
And the intersection 8 is formed. In particular, in a large cylindrical tank in which the spiral side plate peripheral joint 3 has a gentle inclination angle, an intersecting portion 8 is formed in which the strong wheel 4 and the strong wheel mounting weld intersect the side plate peripheral joint 3 over a long distance. You. As described above, in the structure in which the strong ring and the welded portion for attaching the strong ring intersect with the side plate peripheral joint, in order to install the strong ring after the weld inspection of the side plate peripheral joint, there is a process loss problem awaiting the inspection and welding of the side plate peripheral joint. There is a problem that the inspection of the peripheral joint weld is insufficient at the time of maintenance or the like because the part is covered with a strong ring, and there is a problem that there is a concern about occurrence of welding defects or embrittlement of the weld due to intersection of the welds.

[0004]

In order to solve such a problem, the invention of Japanese Utility Model Laid-Open No. 58-130989 has been proposed.
A mounting structure is provided in which ribs are provided on the side plate to fix the strong wheel away from the side plate. However, in this invention, a part of the side plate to which the strengthening wheel is attached is required because of the structure in which the strengthening ring is indirectly attached to the side plate via the ribs, so that the necessary cross-sectional coefficient of the strengthening wheel is required according to the deformation of the side plate. Therefore, there is an economic problem that it is necessary to use a strengthened wheel material having a larger section modulus, and there is also a problem that the rigidity of the strengthened wheel itself is concerned. further,
In the vertical cylindrical tank in which the side plate peripheral joint is formed in a helical shape, the reinforcing ring of the above-mentioned invention, which is mounted separately from the side plate via the rib, is wound around the side plate horizontally. The rib attachment welds will cross,
The same problem as described above, which is concerned about the structure intersecting with the side plate peripheral joint, can be considered. The present invention secures the rigidity of the strengthening wheel itself by directly attaching the strengthening wheel to the side plate by welding, and economically reinforces the deformation of the side plate with the strengthening wheel material having a required minimum section modulus. And a strong ring structure that solves the above-mentioned problem conceivable from the structure in which the side plate circumferential joint intersects with the strong ring in the vertical cylindrical tank in which the side plate circumferential joint is formed in a spiral shape and the structure where the strong ring mounting welded portion and the side plate circumferential joint intersect. Is what you do.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the first invention is to provide a side plate of a vertical cylindrical tank in which a side plate peripheral joint is formed in a spiral shape. Except for the part that intersects with the peripheral joint, the stiffening wheel is wound horizontally and attached, and the part excluding the stiffening ring is attached to the upper and / or lower side plate at a predetermined separation distance from the side plate peripheral joint. The second invention is a strong wheel structure with
A thick plate which does not need to be attached to the side plate material except for the portion intersecting with the side plate peripheral joint according to the invention, by wrapping the strengthening wheel horizontally and mounting only the side plate material corresponding to the portion excluding the strengthening wheel of the side plate. in stronger wheel structure formed by the side plate member, the third invention, the side plate surface of the vertical type cylindrical tank side plate circumferential joint is formed in a spiral shape, and parallel to the side plates circumferential joint provided Jo Tokoro隔接distance the wheel strengthening helically a wheel structure strengthened mounted to put orbiting wound.

[0006]

The strong wheel structure according to the present invention is applied to a vertical cylindrical tank in which a side plate peripheral joint is formed in a spiral shape, and the side plate of the tank is formed by a helical construction method in which the uppermost side plate is spirally wound up and assembled. Assembled by a spiral method. In the first and second inventions, the strengthening wheel is horizontally wound around and attached to the side plate except for a portion that intersects the spirally formed side plate peripheral joint. The removed portion has a structure in which a strengthening wheel is attached to the upper and / or lower side plate at a predetermined separation distance from the side plate peripheral joint, and in the second invention, a portion excluding the strong wheel of the first invention Only the side plate material corresponding to 、 is a thick side plate material that does not require a strong ring
It has a structure formed by. In the third invention,
A structure in which a helically formed side plate peripheral joint and a strengthening wheel that is wrapped around and attached to the side plate surface at a predetermined separation distance and formed in a helical shape parallel to the side plate peripheral joint. I have. In any of the inventions, the helically formed side plate peripheral joint and the strong wheel that is directly or horizontally helically wound and attached to the side plate surface and the strong wheel mounting welded portion directly intersect without directly overlapping each other. Nothing to do.

Further, in the first invention, the crossing portion where the helically formed side plate circumferential joint intersects with the stiffening wheel wound horizontally on the side plate intersects the stiffening ring over the entire outer periphery or inner surface of the side plate. After winding, cut off the strong wheel corresponding to the intersection,
Either move the notched reinforced wheel upward and / or downward and attach it, or separately manufacture a reinforced wheel with the length corresponding to the intersection deducted and a reinforced wheel corresponding to the reinforced wheel at the intersection. Then, attach it to the side plate to form a strong ring.
Further, in the second invention, only the side plate material located at a location excluding the strengthening ring at the intersection in the first invention is assembled by successively adding the side plate materials from below while spirally winding the upper side plate. At times, the strengthening wheel is assembled by adding a thick side plate material that does not require a strengthening wheel, and the strengthening wheel wound horizontally on the side plate is manufactured in advance with a strengthening wheel of a length obtained by subtracting the strengthening wheel from which the intersection is removed. After mounting or installing a strengthening wheel horizontally all around the side plate, the strengthening wheel at the intersection is cut out. Still further, in the third invention, the spiral strengthening wheel is formed of a side plate material to be added when the upper side plate is spirally wound up and the side plate members are sequentially added from below to be assembled .
A strong wheel is spirally wound around the surface, and the strong wheel is attached to the side plate together with the assembly of the side plate. Also in Izure the invention, in parallel with the side plate of the assembly work, Ru fitted with wheels strengthen the side plate in the work area lower height.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing one embodiment of the present invention,
FIG. 7 outlines the vertical cylindrical tank 1 in which the side plate peripheral joint 3 is formed in a spiral shape. A strong wheel 4 is horizontally wound around the outer peripheral surface of the side plate 2 of the vertical cylindrical tank 1. The vertical cylindrical tank 1 adds side plates in order from the bottom while spirally winding up the top side plate,
The side plate 2 is assembled by a helical method, a spiral method, or the like, which is assembled by welding, and the side plate peripheral joint 3 is formed in a spiral shape. Further, the outer peripheral surface of the side plate 2 of the vertical cylindrical tank 1 is made of a shaped steel material such as an angle steel or a grooved steel so as not to be deformed even when subjected to external pressure such as wind or internal pressure such as air shrinkage in the tank. A strengthening wheel for reinforcing the side plate and a strengthening wheel 4 for an intermediate strengthening wheel, which are made of a steel sheet material or the like, are horizontally wound and attached, and are fixed by welding. Since the side plate peripheral joint 3 is formed in a spiral shape and the strengthening wheel 4 wound around the side plate 2 is mounted horizontally, at the intersection 8, the strengthening wheel 4 and the welded portion of the strengthening wheel attachment and the side plate peripheral joint 3 are formed. And intersect. As for the portion where the side plate longitudinal joint 5 and the strengthening wheel 4 attached to the side plate 2 intersect, as before, a part of the strengthening wheel 4 only at the portion intersecting with the side plate longitudinal joint 5 is formed in a scalloped shape which is cut out in an arc shape. The side plate longitudinal joint 5 and the strong wheel 4 and the strong wheel mounting weld are formed so as not to directly intersect or directly overlap each other.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a first embodiment of the first invention.
It is a partial front explanatory view showing an embodiment, and the place shown by a broken line is an intersection 8A of a strong wheel 4 that intersects a spirally formed side plate peripheral joint 3, and the strong wheel 4 is attached to the intersection 8A. Without forming, a predetermined separation distance is provided so as not to affect the welding to the side plate peripheral joints 3 or the inspection of the welded portion of the side plate peripheral joints 3, and the reinforcing wheel 4 is horizontally wound around the side plate 2 and attached. I have. Also, the intersection 8A from which the strengthening wheel 4 is removed is provided with a predetermined separation distance so as not to affect the welding to the side plate peripheral joint 3 or to inspect the welded portion of the side plate peripheral joint 3, and to wind it horizontally. Side plate 2 at the lower position parallel to the strengthening wheel 4
A strong wheel 4A corresponding to the reinforcing force of the removed strong wheel 4 is wound and attached thereto, and fixed by welding. In addition, although the strong wheel 4A of FIG. 1 is installed below the intersection 8A, the installation position may be above the intersection 8A.
Further, the reinforcing wheel 4A may be a two-piece strengthening wheel 4A that is parallel to the upper and lower sides, but as one of these reinforcing structures, a strengthening wheel 4A having a reinforcing force equal to or greater than the strengthening wheel 4 removed from the upper and / or lower side plates 2 is used. It will be a structure to be attached. Also, both ends 4A ', 4A "of the strengthening wheel 4A are connected to both ends 4', 4" of the original strengthening wheel 4 so as to be substantially orthogonal to the side plate peripheral joint 3, respectively, as a reinforcing ring of the strengthening wheel 4. Either secure the integral rigidity or, as shown in FIG.
And 4 "are attached to each other, and a stronger wheel 4A longer than the length connecting the 4" and 4 "is attached to both ends 4 ', 4" and both ends 4A', 4 of the stronger wheel 4A.
A "are wrapped together to secure the integral rigidity of the reinforcing wheel 4 as a reinforcing ring. Both ends 4 ', 4" of the reinforcing wheel 4 wound and mounted horizontally and both ends of the reinforcing wheel 4A When connecting 4A 'and 4A ", the connecting portion of the portion intersecting with the side plate peripheral joint 3 is formed into a scalloped part of which is cut out in an arc shape, and the connection portion and the connection portion mounting welded portion and the side plate peripheral joint 3 are connected. It is formed so that it does not directly cross or directly overlap.

FIG. 2 is a partial front view showing a second embodiment of the first invention. The intersection 8B at the place where the side plate peripheral joint 3 intersects is influenced by welding to the side plate peripheral joint 3 and the side plate periphery. Fitting 3
The strong wheels 4 which are horizontally mounted at a predetermined distance so as not to interfere with the inspection of the welded portion are removed, and two strong wheels 4B are provided at the intersection 8B with one end of each. It is connected to the original strengthening wheel 4 and wound around and attached to the side plate 2 in parallel with the side plate peripheral joint 3. The strong wheel 4B is
It is formed of a member having a side plate reinforcing force corresponding to at least the strong wheel 4 removed at the intersection 8B. Further, FIG.
FIG. 4 is an enlarged partial front view showing a third embodiment of the present invention, and FIG. 4 is an enlarged partial sectional view showing an AA section in FIG. 3. At the intersection 8C excluding the strengthening wheel 4 at the location where the helical formed side plate peripheral joint 3 intersects, an appropriate predetermined separation distance is provided from the side plate peripheral joint 3 so as not to affect welding and inspection. A strengthening wheel 4C made of a concave material straddling over is attached to the side plate 2 directly by welding 6 in parallel with the side plate peripheral joint 3,
The strengthening wheel 4C of the crossing portion 8C and the strengthening wheel 4 which is horizontally wound around and attached to the side plate 2 are joined by welding. In the embodiment shown in FIGS. 3 and 4, the strengthening wheel 4 </ b> C made of a concave material is formed of an integral channel steel material, but two parallel plate materials directly attached to the side plate 2 and the two When one sheet material is detachably connected and formed into a concave material with one covering plate material, the side plate peripheral joint 3 covered with the concave material is formed.
The maintenance inspection after completion of the tank can be easily performed by removing the detachable cover plate.

FIG. 5 is a partial front view showing an embodiment of the second invention, and shows an intersection 8D at a point where a spirally formed side plate peripheral joint 3 and a horizontally mounted reinforcing wheel 4 intersect.
The reinforcing wheel 4 is removed only from the side plates 7 and 7 ′ of rectangular flat plates having a predetermined curvature forming the side plate 2 on which the removed reinforcing wheel 4 is located. Even if not attached, the side plate 2 of the tank 1 is formed of a thick plate that does not cause deformation or the like due to external pressure such as wind or internal pressure such as air shrinkage in the tank. Incidentally, the side plates circumferential joint 3 and intensified ranges excluding wheel 4 intersect is within the range not interfering with the welding effect and inspection, and the plank
Any range may be used as long as it is within the range of the side plate 2 formed by the side plate members 7 and 7 ' .

FIG. 6 is an explanatory partial front view showing an embodiment of the third invention, in which the spirally formed side plate peripheral joint 3 and the strengthening wheel 4E do not interfere with the welding and the inspection of the welded portion. Provide a predetermined separation distance that is not so large as shown in the figure.
3 and the entire circumference of the way the side plates 2 to be parallel to the spiral, i.e.
This is a structure of a strong wheel in which a rotating strong wheel 4E is wound and attached. The ends 4E 'and 4E "of the strengthening wheel 4E are respectively orthogonal to the side plate peripheral joint 3 so that the ends 4E' and 4E" thereof are substantially orthogonal to each other.
To secure the integral rigidity of the reinforcing ring 4E as a reinforcing ring, or as shown in FIG.
E ′ and 4E ″ are formed so as to overlap each other to secure the integral rigidity of the strengthening wheel 4E as a reinforcing ring.

[0013]

Since the present invention is configured as described above, the following effects can be obtained. First, claims 1 to 3
All In each invention, the side plates circumferential joint horizontal side plates of the vertical type cylindrical tank is formed in a spiral or helically wound with wheels strengthened mounted by the spiral side plates circumferential joint, that
Since there is no intersect is not examined insufficient problems that are concerned by the side plates circumferential joint is covered by the issue and stronger wheel step loss of waiting for the side plates circumferential joint weld inspection in order to attach the strengthening ring, In addition, there is no need to worry about weld defects or weld embrittlement caused by the intersection of the side plate peripheral joint weld and the strong ring attachment weld, and the strong wheel is wound directly on the side plate surface .
Since the structure for mounting Te, with strong rigidity of intensified wheels is ensured, Ru can economical reinforcement against deformation or the like of the side plate. Furthermore, the strengthening wheels, if the winding work to the side plate surface at a work site a low height of assembling a side plate, mounted safer strengthened wheel.

[0014] In addition, in the first invention according to claim 1, together with the attached put horizontally wound the wheels strengthen the side plate except at the intersection with the side plates circumferential joint formed in a spiral shape, a strengthened wheel The removed part is a simple structure because it has a structure in which a strong ring is attached to the side plate provided with a predetermined separation distance from the side plate circumferential joint, so it is a simple structure, and furthermore, the side plate circumferential joint and the strong ring intersect and are constructed. It can also be applied to the retrofitting of strong wheels of existing rigid cylindrical tanks, and the assembling time of the strong wheels can be freely adjusted. As a result, the rigid cylindrical tank construction process can be shortened.

[0015] In the second invention according to claim 2, upper
In addition to the effects described above, only the side plate material corresponding to the portion excluding the strong wheel of the first invention is used for a thick plate that does not require the mounting of the strong wheel .
Since manually formed in the side plate member, the thickness of a portion except for the strengthening ring
Not only the labor of providing a special strengthening ring on the plate side plate is not only omitted, but also an accessory attached to a thick side plate on which the strengthening ring is not attached, for example, a reinforcing plate for the nozzle opening when attaching the side nozzle It is not required, or around
When installing stairs or fire extinguishing piping, etc.
It can be easily installed because there is no strong wheel
Etc., that Do and easy assembly of the side plate accessories. Furthermore, when assembling the side plate by adding the side plate material from the bottom in order while winding up the upper side plate in a spiral shape , from the thick plate that does not need to install a strong ring
Comprising replenishing the plate member assembly to side plate lever, the only height position <br/> attachment of <br/> stronger wheels mounted Runomi put horizontally wound the wheels strengthened other side plate of the location is completed So the installation work of the strong wheel
Ing and easier constructive wheel structure.

According to the third aspect of the present invention, in addition to the above-mentioned effects, in addition to the operation of assembling the side plates by sequentially joining the side plates from below while spirally winding the upper side plate, the strengthened wheel material is removed. attached to the side plate, at the same time as the assembly of the side plates, factory assembling a spiral of increasingly wheel at a lower same location
Because the law can be adopted , it is very workable and safer
The two sets erected that strengthened wheel structure.

[Brief description of the drawings]

FIG. 1 is a partial front explanatory view showing a first embodiment of a strong wheel structure of a tank having a spiral side plate peripheral joint according to a first invention of the present invention, with a part thereof being omitted;

FIG. 2 is a partial front explanatory view showing a second embodiment of a strong wheel structure of a tank having a spiral side plate peripheral joint according to the first invention of the present invention, with a part thereof omitted;

FIG. 3 is an enlarged partial front view showing a third embodiment of a strong wheel structure of a tank having a helical side plate peripheral joint according to the first invention of the present invention, in which a part is omitted and enlarged.

FIG. 4 is a partial cross-sectional explanatory view showing an AA cross section of FIG. 3 in an enlarged manner.

FIG. 5 is a partial front view, partially omitted, showing an embodiment of a strong wheel structure of a tank having a spiral side plate peripheral joint according to a second invention of the present invention.

FIG. 6 is a partial front explanatory view showing one embodiment of a strong wheel structure of a tank having a helical side plate peripheral joint according to a third invention of the present invention, with a part omitted.

FIG. 7 is an explanatory front view of a rigid cylindrical tank in which a reinforcing ring is horizontally wound around and attached to a side plate in which a side plate peripheral joint is formed in a spiral shape.

[Explanation of symbols]

1: Vertical cylindrical tank 2: Side plate 3: Spiral upper plate peripheral joint 4: Stronger ring 5: Side plate longitudinal joint 6: Stronger ring attachment welded part 7: Side plate material 8: Intersection between side plate peripheral joint and stronger ring

Claims (3)

(57) [Claims] 1. A strengthening wheel is horizontally wound around and attached to a side plate of a vertical cylindrical tank in which a side plate circumferential joint is formed in a helical shape, except for a portion intersecting with the side plate circumferential joint, and the strong wheel is removed. A strong wheel structure for a tank having a spiral side plate peripheral joint, wherein a strengthening ring is attached to an upper and / or lower side plate provided at a predetermined distance from the side plate peripheral joint. 2. A stiffening wheel is horizontally wound around a side plate of a vertical cylindrical tank in which a side plate peripheral joint is formed in a spiral shape except for a portion intersecting with the side plate peripheral joint, and the stiffening wheel of the side plate is attached. A strong wheel structure for a tank having a helical side plate peripheral joint, characterized in that only the side plate material corresponding to the removed portion is formed of a thick side plate material that does not require attachment of a strong wheel. Wherein the side plate to the side plate surface of the vertical type cylindrical tank circumferential joint is formed in a spiral shape, side plates provided Jo Tokoro隔接distance circumferential joint
Parallel spiral in the circumferential wound to the tank with a spiral plate peripheral joints characterized by this <br/> and Ru fitted with wheels strengthened strengthened wheel structure.