JP2650020B2 - Pump barrel frame structure of low temperature storage tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a pump barrel frame structure of a low-temperature storage tank.

[0002]

2. Description of the Related Art Generally, in a ground-type flat bottom cylindrical storage tank such as a PCLNG storage tank including a PC outer tank and a steel inner tank, a low-temperature liquefied liquid such as LNG stored in the inner tank is provided with a function of a liquid barrier. It is not preferable from the viewpoint of the function of the liquid barrier that the water is paid out from a pipe penetrating a side plate made of a prestressed concrete structure of a PC outer tank that is also provided. So, PCL
In NG storage tanks and the like, a method is often used in which a low-temperature liquefied liquid is pumped up using a pump barrel and discharged from an inner tank roof structure. As a conventional pump barrel frame structure, as shown in FIG. 5, a plurality of pump barrels themselves are used as chord members of a support frame, and diagonal members (trusses) are arranged to further increase rigidity. Pump barrel structures are known. (See, for example, JP-A-5-118.
No. 498)

[0003]

The use of the pump barrel as a chord of the support frame as described above can increase the rigidity and improve the effect of earthquake resistance. Stress deformation due to the large temperature difference that occurs cannot be tolerated. The reason is that a part of the pump barrel suspended and supported by the roof structure comes into contact with a low-temperature liquefied liquid such as LNG, and the rest is in a gas atmosphere.
When one of the plurality of pump barrels is used for the liquid discharging operation, the entire pump barrel comes into contact with the low-temperature liquefied liquid and contracts under the influence of heat. There is a disadvantage in that a stress load due to thermal deformation occurs between the truss structure and the joint portion of the truss structure, which is inconvenient.

An object of the present invention is to provide a three-dimensional truss support frame separately from a pump barrel main body, and to support the pump barrel with a sleeve joint from this frame so as not to restrain axial displacement due to thermal effects. An object of the present invention is to provide a frame structure.

[0005]

SUMMARY OF THE INVENTION The above object is achieved by providing
At least three pump barrels suspended from the tank roof structure
A standing body truss supported to support the inner tank bottom plate or on the inner tank roof structure
Pump barrel frame structure of low-temperature storage tank supported on a supported frame
, The long vertical chord material should be at least
Arrange so as to be the vertices of a regular polygon equal to or greater than a triangle.
Horizontal chords can be set up in multiple stages between adjacent vertical chords.
At the same time, diagonal members are connected obliquely between adjacent vertical
The horizontal chord is set up on the other hand.
Ribs are extended to the left and right sides of each vertical chord
The ribs are formed by the vertical chords.
A large regular polygon similar to the regular polygon
The pump barrel is loosely inserted at the intersection of the ribs that make up the polygon
Set each of the sleeves to be stepped, and
The truss support frame is installed in the center of the enclosed area.
Achieved by contact. The above purpose is
At least three pump barrels suspended from the tank roof structure
Truss support to support the inner tank bottom plate or the inner tank roof structure
Pump barrel frame structure of low-temperature storage tank supported on a supported frame
, A long vertical chord material with a plane shape of square
To be the vertices of a regular polygonal shape formed by the even sides
And place horizontal chords between each adjacent vertical chord
And sloping diagonals between adjacent vertical chords.
To form a three-dimensional truss support frame.
In the part corresponding to the inside of the central part of the horizontal chord every other,
It is supposed that each of the sleeves into which the pump barrel is inserted
In addition, each sleeve and the corresponding horizontal chord
Connect the vertical chord with the rib material, and outside of each pump barrel
The outer truss support frame
Is done.

[0006]

[Function] A case where a large temperature difference occurs between the pump barrels by providing a rigid rigid space truss support frame separately from the pump barrel main body and inserting and supporting the pump barrel in a sleeve provided for the support frame. However, since the three-dimensional truss support frame itself does not restrain the axial displacement of the pump barrel, it is possible to easily handle stress loads due to thermal deformation and obtain a highly safe pump barrel.

[0007]

Next, details of an embodiment of the present invention will be described with reference to the drawings. 1 is an explanatory view of the present invention, FIG. 2 is a plan view of a three-dimensional truss support frame having a structure inscribed in a pump barrel, FIG.
FIG. 4 is a partially cutaway front view of a main part of FIG. 2, and FIG. 4 is a plan view of a three-dimensional truss support frame having a structure circumscribing a pump barrel.

[0008] FIG. 1, inscribed type of pump barrel with in Figure 2
The frame structure will be described. The upper part was hung on the roof structure of inner tank 2.
Place at least three or more pump barrels 5 on the inner tank bottom plate
Is supported by a three-dimensional truss support frame supported by the inner tank roof structure.
Pump barrel structure of the low-temperature storage tank
When the vertical chord 1b is formed in a plane
Arranged to be the vertices of a regular polygon, and adjacent vertical strings
The horizontal chord members 1a are provided in multiple stages between the members 1b,
An oblique material 1c is obliquely connected between adjacent vertical chords 1b to form a three-dimensional structure.
A truss support frame 1 is constructed, while the horizontal chord 1
a on the left and right sides of the vertical chord 1b
The rib members 3 are extended, and the vertical
Large regular multiple similar to regular polygon formed by chord 1a
Intersection point of rib material 3 which forms a polygon and which forms this regular polygon
The sleeves 4 into which the pump barrels 5 are loosely inserted are provided step by step.
The center of the area surrounded by each pump barrel 5
And the space truss support frame 1 is inscribed therein.
In the figure, 2a is an inner tank side plate, and 4a is provided on the upper and lower sides of the sleeve 4.
The girder ring 6 is an arm member.

Referring to FIG. 4 , a circumscribed pump barrel frame structure is shown.
The construction will be described. The long vertical chord material 10b has a square shape of 4
Vertices of regular polygons formed by even-numbered sides that are square or larger
And arranged between the adjacent vertical chord members 10b.
The horizontal chord members 10a are provided in multiple stages and are adjacent to each other.
A diagonal member (not shown) is obliquely connected between the vertical chord members 10b to stand.
The body truss support frame 10 is constructed, while every other
In the portion corresponding to the inside of the central part of the horizontal chord material 10a,
When each of the sleeves 4 into which the pump barrel 5 is loosely inserted is set,
In each case, each sleeve 4 and the corresponding horizontal chord material 10a
Are connected to the vertical chord material 10b at both ends by rib material 3.
The three-dimensional truss support frame 10 is provided outside the pump barrel 5.
It was a circumscribed one.

[0010]

According to the configuration of the present invention as described above,
The following effects can be obtained. (A) Inscribed in this pump barrel separately from the pump barrel
Or, a truss support frame to be circumscribed is constructed, and a pump barrel that is suspended and supported on the inner tank roof structure is inserted and supported in a vertically slidable manner with respect to the sleeve provided on the three-dimensional truss support frame. During operation, a large temperature difference occurs between the pump barrels, and even if this temperature difference causes a stress load due to thermal deformation between the pump barrels, the axial displacement of the pump barrel may be restricted by the support frame. And the response is easy. (B) The space truss support frame can sufficiently withstand the thermal deformation of the inner tank during an earthquake or cooldown, and the thermal deformation of the space truss support frame during the earthquake or cooldown can affect the pump barrel. without further
In addition, safety can be improved more rationally.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the present invention.

FIG. 2 is a plan view of a space truss support frame having a structure inscribed in a pump barrel.

FIG. 3 is a partially cutaway front view of a main part of FIG. 2;

FIG. 4 is a plan view of a space truss support frame having a structure circumscribing a pump barrel.

FIG. 5 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inscribed three-dimensional truss support frame 1a Horizontal chord material 1b Vertical chord material 1c Diagonal material (truss) 2 Inner tub 2a Inner tub side plate 3 Rib material 4 Sleeve 4a Ring 5 Pump barrel 6 Arm material 10 External cubic truss support Frame 10a Horizontal chord 10b Vertical chord

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Patent Publication No. 50-22733 (JP, B2) Real Public Showa 60-556 (JP, Y2)

Claims (2)

(57) [Claims] 1. At least an upper part suspended from an inner tank roof structure
At least three pump barrels are mounted on the inner tank bottom plate or inner tank roof
Low-temperature storage tank supported on a space truss support frame
In the pump barrel frame structure of the long vertical chord material,
The vertices of a regular polygon whose plane shape is at least an equilateral triangle
And arrange horizontal chords between adjacent vertical chords.
It is set up in multiple stages, with diagonal bars between adjacent vertical chords.
To form a three-dimensional truss support frame.
, The left and right outer parts of each vertical chord where the horizontal chord is stepped
The rib material is extended to each side, and each rib material
A large positive similar to a regular polygon formed by the vertical chord
Intersection of the ribs that make up the polygon and this regular polygon
The sleeves into which the pump barrels are loosely inserted
To the center of the area enclosed by each pump barrel
The low-profile truss support frame is inscribed.
Pump barrel structure of warm storage tank. 2. At least an upper part suspended from an inner tank roof structure
At least three pump barrels are mounted on the inner tank bottom plate or inner tank roof
Low-temperature storage tank supported on a space truss support frame
In the pump barrel frame structure of
A regular shape whose surface shape is formed by even-numbered sides of a square or more
Arranged to be the vertices of the angular shape, each adjacent vertical chord
Horizontal chords are multi-tiered between the materials, and adjacent to each other
Space truss support frame with diagonal connection between each vertical chord
While the middle of every other horizontal chord
A slot into which the pump barrel is loosely inserted
Each sleeve and corresponding to each sleeve
To connect the vertical chords at both ends of the horizontal chords with ribs
Then, the space truss support frame is placed outside each pump barrel.
Pump barrel for cold storage tank characterized by external connection
Frame structure.