JP2000336740A - Support structure of prewhirl tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure and improve the manufacturing workability to reduce cost by supporting a prewhirl tank by a plurality of anchor bolts erected on the bottom of a structure for installing a pump. SOLUTION: A plurality of anchor bolts 4 are erected on the bottom 3A of a structure 3 for installing a pump or the like for a manhole or the like constructed at an appropriate position of a sewage downflow piping system and prewhirl tank support plate 7 is supported by the anchor bolt 4 and the prewhirl tank 1 is supported through the prewhirl tank support plates 7. Hence, the structure is simplified and the manufacturing workability is improved and further, cost can be reduced. Moreover, the weight is reduced by simplification of the structure. And it becomes easy to handle and installation workability can be improved. Meanwhile, the delivery bend pipe can be supported by the anchor bolts 4 through the prewhirl tank support plate 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure of a retrofitting pre-swirl tank installed at the bottom of a manhole constructed in an appropriate place in a sewage downflow piping system, for example.

[0002]

2. Description of the Related Art Conventionally, a retrofitting pre-swirl tank made of fiber-reinforced plastic (hereinafter simply referred to as a pre-swirling tank) is provided at the bottom of a concrete manhole constructed in an appropriate place of a sewage drainage piping system connecting a sewage generation source and a sewage treatment plant. The technology for setting up a swirl tank is well known.

[0003] As a conventional support structure for a pre-swirling tank, there is a support structure using gantry 10A, 10B shown in Figs. The gantry 10A, 10B is provided with an upper member 10a and a lower member 10b whose projected plane shape is H-shaped, and a leg member 10c for integrally connecting these two members.
b are fixed by four anchor bolts 12, 12... erected on the bottom member 11A of the manhole 11 (only two anchor bolts 12, 12 are shown in FIG. 10).

[0004] Each of the upper members 10 of the gantry 10A, 10B
a are fixedly attached to the four bolts 13, 13... Therefore, after fixing the lower members 10b of the gantry 10A, 10B to the bottom 11A of the manhole 11 by the anchor bolts 12, 12,...
As shown in FIG. 11 and FIG. 11, four through holes 1a, 1a... Provided in the mounting seats 1A, 1A of the pre-swirl tank 1 respectively (however, FIG. 10 and FIG. Only two through-holes 1a, 1a are shown) and projected upward, and a nut 14 is screwed into this projected portion, so that the pre-rotation tank 1 is supported by the gantry 10A, 10B. Pre-swirling tank 1 and bottom 11 of manhole 11
A mortar or concrete 18 is poured into the space formed between the nuts A, and after the mortar or concrete 18 has solidified,
Are unscrewed, and bolts 13, 13,.
(See FIG. 10 and FIG. 11, only two through-holes 2a, 2a are shown) and project upward through the four through-holes 2a, 2a provided in the base portion 2A. By screwing the nut 14 onto the portion,
A, 1A, the discharge curved pipes 2, 2 are placed, and the mounting seats 1A, 1A
The discharge curved pipes 2 and 2 are supported by the gantry 10A and 10B through the base.

[0005]

However, the conventional support structure for the pre-swirling tank has a structure in which the upper member 10a, the lower member 10b, and the leg member 10c are first cut and welded by L-shaped steel.
And a bolt 1 is attached to the upper member 10a.
, And four holes for inserting the anchor bolts 12, 12,... Are formed on the lower member 10b. Next, the upper member 10a, the lower member 10b, and the leg member 10c are integrally joined by welding, and further, bolts 13, 13,... Are inserted through the four holes provided in the upper member 10a from below, respectively.
Four bolts 13, 13,... On the upper member 10a by welding
Gantry 10A with a complicated structure through a complicated process of fixing
10B must be manufactured. For this reason, manufacturing workability is inferior and cost increases. Further, since the weight is heavy, handling becomes difficult, and the workability of installing the gantry 10A, 10B is inferior. In particular, when the pump installation structure is a manhole,
A heavy base 10 at the bottom of a relatively narrow manhole
Since A and 10B are handled, there is a problem that handling becomes more difficult and the workability of installing the gantry 10A and 10B is further deteriorated.

Accordingly, the present invention improves the manufacturing workability by simplifying the structure to reduce the cost, and also reduces the weight to facilitate the handling and improve the installation workability. It is an object of the present invention to provide a support structure for a pre-rotation tank that can be easily installed with good workability even at the bottom.

[0007]

In order to achieve the above object, a support structure for a pre-swirling tank according to the present invention is provided with a plurality of anchor bolts erected on the bottom of a pump installation structure. The pre-swirl tank is supported by this.

In order to achieve the above object, according to a second aspect of the present invention, there is provided a support structure for a pre-swirl tank, wherein the pre-swirl tank support plate is supported by a plurality of anchor bolts erected on the bottom. The pre-swirl tank is supported via the pre-swirl tank support plate.

According to a third aspect of the present invention, there is provided a support structure for a pre-swirl tub, wherein a bottom plate on which a plurality of anchor bolts are erected is provided at the bottom of the pump installation structure. The pre-swirl tank is fixed to the bottom portion over a hole that is provided and supported by the plurality of anchor bolts.

According to a fourth aspect of the present invention, there is provided a support structure for a pre-swirl tank, wherein the pre-swirl tank support plate is supported by a plurality of anchor bolts erected on the bottom plate. The pre-swirl tank is supported via the pre-swirl tank support plate.

According to the first aspect of the present invention, the structure is simplified because the pre-rotation tank is supported by the plurality of anchor bolts. Therefore, manufacturing workability can be improved and cost can be reduced. In addition, since the structure is simplified and the weight can be reduced, the handling becomes easy, and the plurality of anchor bolts can be installed by the simple work of standing upright on the bottom of the pump installation structure, so that the installation workability is improved. Further, the discharge curved pipe can be supported by a plurality of anchor bolts via the pre-swirl tank.

According to the second aspect of the present invention, since the pre-swirl tub is supported by the plurality of anchor bolts and the pre-swirl tub support plate, the structure is simplified. Therefore, manufacturing workability can be improved and cost can be reduced. In addition, since the structure can be simplified and the weight can be reduced, handling becomes easy,
Since a plurality of anchor bolts can be installed by a simple operation of erecting them on the bottom of the pump installation structure, installation workability is improved. Further, the discharge curved pipe can be supported by a plurality of anchor bolts via a pre-rotation tank support plate.

According to the third aspect of the present invention, since the pre-rotation tank is supported by the plurality of anchor bolts and the bottom plate on which the anchor bolts are erected, the structure is simplified. Therefore, manufacturing workability can be improved and cost can be reduced. In addition, since the structure is simplified and the weight can be reduced, the handling becomes easy, and the simple work of fixing the bottom plate to the bottom of the pump installation structure by straddling the hole provided in the bottom of the pump installation structure. Since installation is possible, installation workability is improved. Further, the discharge curved pipe can be supported by a plurality of anchor bolts via the pre-swirl tank.

According to the fourth aspect of the present invention, the pre-rotation tank is supported by the plurality of anchor bolts, the bottom plate on which the anchor bolts are erected, and the pre-rotation tank support plate supported by the anchor bolts. Therefore, the structure is simplified. Therefore, manufacturing workability can be improved and cost can be reduced. In addition, since the structure is simplified and the weight can be reduced, the handling becomes easy, and the simple work of fixing the bottom plate to the bottom of the pump installation structure by straddling the hole provided in the bottom of the pump installation structure. Since installation is possible, installation workability is improved. Further, the discharge curved pipe can be supported by a plurality of anchor bolts via a pre-rotation tank support plate.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of the invention described in claim 1. In this figure, a pre-swirling tank 1 has four sets of four standing on the bottom 3A of a manhole 3 for a total of eight pieces. Anchor bolts 4, 4 ... (However, FIG. 1
Are shown, only two anchor bolts 4, 4 are shown in total. In particular,
Anchor bolts 4 erected on the bottom 3A of the manhole 3
4. A male screw 4A is provided at each upper end, and a lower nut 5A is screwed into the male screw 4A in advance.
In this state, four through holes 1a, 1a... Provided in each of the mounting seats 1A, 1A of the pre-rotation tank 1 (however, only two through holes 1a, 1a are shown in FIG. 1). The male screws 4A of each of the anchor bolts 4, 4... Penetrate from below, and a part of the male screw 4A is projected above the mounting seats 1A, 1A.
And the lower nut 5A and the upper nut 5B sandwich the mounting seats 1A, 1A, so that two sets of four, a total of eight anchor bolts 4, 4,... I support.

Four sets of two, a total of eight anchor bolts 4,
4, the pre-rotation tank 1 is supported by the pre-rotation tank 1.
As shown in FIG. 2, mortar or concrete 6 is cast into a space formed between the mortar and the bottom 3 </ b> A of the manhole 3. Cast mortar or concrete 6
After the solidification, the upper nut 5B is unscrewed and the anchor bolts 4, 4,.
.. (Provided that only two through-holes 2a, 2a are shown in FIG. 2), and project upward. Of the mounting seats 1A, 1A
The discharge curved pipes 2, 2 are mounted on the base plate, and the discharge curved pipes 2, 2 are supported by a total of eight anchor bolts 4, 4,.

As described above, the support structure of the pre-swirl tub 1 is constituted by the four sets of four, a total of eight anchor bolts 4, 4. Compared with the support structure, the structure is simplified, the manufacturing workability is improved, and the cost can be reduced. Also, since the weight can be reduced, the handling becomes easy, and
The two sets, a total of eight anchor bolts 4, 4,..., Can be installed by a simple operation of erecting on the bottom 3A of the manhole 3, so that the installation workability is improved. Therefore, even if it is the bottom inside the manhole 1 which is relatively narrow, it can be easily installed with good workability.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a sectional view showing one embodiment of the invention described in claim 2. The same parts as those of the first aspect are denoted by the same reference numerals, and detailed description thereof will be omitted. In FIG. 3, two sets of four anchor bolts 4, 4 standing on the bottom 3A of the manhole 3, a total of eight anchor bolts 4, 4... Are shown) to support the pre-swirl tank support plates 7, 7 and the pre-swirl tank 1 via the pre-swirl tank support plates 7, 7. Specifically, the lower nut 5A is previously screwed to the male screw 4A of each of the anchor bolts 4, 4,.... In this state, the four through holes 7a,
7a... (However, only two through holes 7a, 7a are shown in FIG. 3), the male screws 4A of the anchor bolts 4, 4,. The upper nut 5B is screwed onto the projecting male screw 4A, and the pre-rotation tank support plates 7, 7 are sandwiched between the lower nut 5A and the upper nut 5B. The pre-swirl tank support plates 7, 4 are supported by a total of eight anchor bolts 4, 4.

On the other hand, the pre-swirl tank support plates 7 are provided with through holes 7.
Four through-holes 7b, 7b ... outside of a, 7a ... (however, FIG. 3 shows only two through-holes 7b, 7b)
Are provided in advance, and these four through holes 7b, 7b...
… Through the four bolts 8, 8 from the lower side (however, only two bolts 8, 8 are shown in FIG. 3) and are fixed to the pre-rotation tank support plates 7, 7 by welding. Keep it. Also,
The pre-swirling tank 1 is provided with cutouts 1B, 1B formed by cutting out portions corresponding to the seats 1A, 1A described above, and four through holes 1b, 1 around the cutouts 1B, 1B.
b (however, FIG. 3 shows only two through holes 1b, 1b). Therefore, when the pre-swirl tank support plates 7, 7 face the lower side of the notches 1B, 1B,
Four bolts 8, 8 from the lower side of the four through holes 1b, 1b.
, And projecting upward, and by screwing a nut 8A to the projecting portion, a total of eight anchor bolts 4, 4. Thereby, the pre-rotation tank 1 can be supported.

Two sets of four via the pre-rotation tank support plates 7
Pre-rotation tank 1 with a total of 8 anchor bolts 4, 4 ...
With the pre-swirl tank 1 and the bottom 3 of the manhole 3
Mortar or concrete 6 is cast in the space formed between the spaces A as shown in FIG. After the cast mortar or concrete 6 has solidified, the upper nut 5B is unscrewed, and the anchor bolts 4, 4... Each of the male screws 4A are provided in the base 2A of the discharge curved pipes 2, 2. 2a, 2a ... (however, only two through holes 2a, 2a are shown in FIG. 4) and project upward, and an upper nut 5B is screwed into this projecting portion, thereby preliminarily. The discharge curved pipes 2 and 2 are placed on the swirl tank support plates 7 and 7, and two sets of four are provided via the pre-swirl tank support plates 7 and 8 in total.
The discharge bending pipes 2, 2 are supported by the anchor bolts 4, 4,.

As described above, since the support structure of the pre-rotation tank 1 is constituted by the two sets of four anchor bolts 4, 4,... And the pre-rotation tank support plates 7, 7, the conventional gantry 10
A, Compared with the pre-swirling tank support structure using 10B,
The structure is simplified, manufacturing workability is improved, and costs can be reduced. In addition, since the weight reduction can be achieved, the handling becomes easy, and the four sets of four, a total of eight anchor bolts 4, 4... Can be installed by the simple work of erecting on the bottom 3A of the manhole 3. Therefore, the installation workability is improved. Therefore, even if it is the bottom inside the manhole 1 which is relatively narrow, it can be easily installed with good workability.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a sectional view showing one embodiment of the invention described in claim 3. The same parts as those of the first or second aspect of the invention are denoted by the same reference numerals, and detailed description thereof will be omitted. In FIG. 5, two sets of four bolts, a total of eight anchor bolts 4, 4... (However, only two sets of two anchor bolts 4, 4 are shown in FIG. The pre-swirl tank 1 is provided by these anchor bolts 4, 4.
Is supported. Specifically, the bottom plate 9 has four through holes 9a, 9a... (However, in FIG.
9a only) is provided in advance. Also,
A relatively large hole 3 is provided at the center of the bottom 3A of the manhole 3.
B are provided, and four fixing bolts 10, 10... (However, FIG.
(Only the fixing bolts 10, 10 of the book are shown) are implanted and project above the bottom 3A.

Therefore, the four through holes 9a, 9
a are inserted through the bottom of the bottom plate 9 and the nuts 10A are screwed onto the protruding portions to thereby fix the manhole 3. Bottom 3A straddling hole 3B provided in bottom 3A
After the bottom plate is fixed to the lower nut 5A, the lower nut 5A previously screwed to the male screw 4A provided at the upper end of each of the anchor bolts 4, 4,... And the upper nut 5 screwed to the male screw 4A
B, the mounting seats 1A, 1A are sandwiched, so that four sets of two, a total of eight anchor bolts 4, 4,... And a bottom plate 9 on which these anchor bolts 4, 4,. The tank 1 is supported.

Four sets of four, a total of eight anchor bolts 4,
In a state where the pre-swirling tank 1 is supported by 4 and the bottom plate 9,
As shown in FIG. 6, mortar or concrete 6 is poured into a space formed between the pre-swirling tank 1 and the bottom 3A of the manhole 3 and a hole 3B communicating with this space.
After the cast mortar or concrete 6 has solidified, the upper nut 5B is unscrewed, and the anchor bolts 4, 4... Each of the male screws 4A are provided in the base 2A of the discharge curved pipes 2, 2. 2a, 2a ... (however,
FIG. 6 shows only two through-holes 2a, 2a) and protrudes upward.
By screwing B, the discharge curved pipes 2 and 2 are mounted on the mounting seats 1A and 1A, and two sets of four are provided via the mounting seats 1A and 1A, for a total of eight anchor bolts 4, 4. Supports the discharge curved pipes 2 and 2.

In this way, four sets of four, a total of eight anchor bolts 4, 4,..., And these anchor bolts 4, 4,... Are erected and straddle the hole 3B of the bottom 3A of the manhole 3 to the bottom 3A. Since the supporting structure of the pre-swirl tank 1 is constituted by the fixed bottom plate 9, the conventional gantry 10A, 10B
As compared with the support structure of the pre-swirling tank that uses, the structure is simplified, the manufacturing workability is improved, and the cost can be reduced.
In addition, since the weight can be reduced, the handling becomes easy, and two sets of four anchor bolts 4 and 4 in total are provided.
Can be installed by a simple operation of erecting on the bottom 3A of the manhole 3, so that the installation workability is improved. Therefore, even if it is the bottom inside the manhole 1 which is relatively narrow, it can be easily installed with good workability.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a sectional view showing an embodiment of the invention described in claim 4. The same parts as those of the first, second, and third aspects are denoted by the same reference numerals, and detailed description thereof will be omitted.
In FIG. 7, two sets of four bolts erected on the bottom plate 9, a total of eight anchor bolts 4, 4...
(Only a total of four anchor bolts 4, 4 are shown)
The pre-swirl tank support plates 7 are supported by the pre-swirl tank support plates 7, and the pre-swirl tank 1 is supported via the pre-swirl tank support plates 7 and 7. Specifically, anchor bolts 4, 4.
A is screwed in advance with the lower nut 5A. In this state, four through holes 7a, 7a... Provided in each of the pre-swirl tank support plates 7, 7 (however, two through holes 7a,
7a is shown only) from the bottom to the anchor bolt 4,
4. Each male screw 4A is penetrated, a part of the male screw 4A is projected above the pre-rotation tank support plate 7, 7, and the upper nut 5B is screwed to the projected male screw 4A, and the lower nut 5B is screwed. By holding the pre-rotation tank support plates 7, 7 between the nut 5A and the upper nut 5B, the pre-rotation tank support plates 7, 7 are supported by a total of eight anchor bolts 4, 4,. I do.

The bottom plate 9 has four through holes 9a, 9a.
(However, only two through holes 9a, 9a are shown in FIG. 7) are provided in advance, and a relatively large hole 3B is provided at the center of the bottom 3A of the manhole 3. Four fixing bolts 10, 10... (However, only two fixing bolts 10, 10 are shown in FIG. 7) are implanted in the bottom 3A around the hole 3B, and the bottom 3A is formed.
Projecting upward.

On the other hand, the through holes 7 are provided in the pre-rotation tank support plates 7 and 7.
Four through-holes 7b, 7b ... outside of a, 7a ... (however, FIG. 7 shows only two through-holes 7b, 7b)
Are provided in advance, and these four through holes 7b, 7b...
… Through the four bolts 8, 8 from the lower side (however, only two bolts 8, 8 are shown in FIG. 7) and are fixed to the pre-rotation tank support plates 7, 7 by welding. Keep it. Also,
The pre-swirling tank 1 is provided with cutouts 1B, 1B formed by cutting out portions corresponding to the seats 1A, 1A described above, and four through holes 1b, 1 around the cutouts 1B, 1B.
b (however, FIG. 7 shows only two through holes 1b, 1b).

Therefore, the four through holes 9a, 9
a are inserted through the bottom of the bottom plate 9 and the nuts 10A are screwed onto the protruding portions to thereby fix the manhole 3. Bottom 3A straddling hole 3B provided in bottom 3A
After fixing the bottom plate 9 to the bottom, the pre-swirl tank support plates 7, 7 are exposed to the lower side of the cutouts 1B, 1B.
1b ... penetrates four bolts 8, 8 ... from the lower side to protrude upward, and by screwing a nut 8A to this protruding portion, the four bolts 8 via the pre-rotation tank support plate 7, 7 two sets,
The pre-rotation tank 1 can be supported by a total of eight anchor bolts 4, 4,.

The two sets of four via the pre-swirl tank support plates 7
Pre-rotation tank 1 with a total of 8 anchor bolts 4, 4 ...
With the pre-swirl tank 1 and the bottom 3 of the manhole 3
As shown in FIG. 8, mortar or concrete 6 is cast in the space formed between A. After the cast mortar or concrete 6 has solidified, the upper nut 5B is unscrewed, and the anchor bolts 4, 4... Each of the male screws 4A are provided in the base 2A of the discharge curved pipes 2, 2. 2a, 2a ... (however, only two through holes 2a, 2a are shown in FIG. 8) and project upward, and an upper nut 5B is screwed onto this projecting portion to thereby provide a preliminary The discharge curved pipes 2 and 2 are placed on the swirl tank support plates 7 and 7, and two sets of four are provided via the pre-swirl tank support plates 7 and 8 in total.
The discharge bending pipes 2, 2 are supported by the anchor bolts 4, 4,.

In this manner, two sets of four anchor bolts 4, 4,..., And a total of eight anchor bolts 4, 4,... Are erected to extend over the hole 3B of the bottom 3A of the manhole 3 to the bottom 3A. The fixed bottom plate 9 and the anchor bolts 4, 4
Since the support structure of the pre-swirl tank 1 is constituted by the pre-swirl tank support plates 7, 7 supported by.
A, Compared with the pre-swirling tank support structure using 10B,
The structure is simplified, manufacturing workability is improved, and costs can be reduced. In addition, since the weight reduction can be achieved, the handling becomes easy, and the four sets of four, a total of eight anchor bolts 4, 4... Can be installed by the simple work of erecting on the bottom 3A of the manhole 3. Therefore, the installation workability is improved. Therefore, even if it is the bottom inside the manhole 1 which is relatively narrow, it can be easily installed with good workability.

In the above embodiment, four anchor bolts 4, 4,... Are used corresponding to one discharge curved pipe 2, but the number of anchor bolts 4, 4,. There may be. In addition, although it is installed on the bottom 3A of the manhole 3, it can be applied to installation on the bottom inside a pump installation structure other than the manhole 3.

[0033]

As described above, the support structure for the pre-swirl tank according to the first aspect of the present invention supports the pre-swirl tank with a plurality of anchor bolts erected on the bottom of the pump installation structure. As a result, the structure is simpler than that of the conventional pre-swirl tank support structure, so that the manufacturing workability can be improved and the cost can be reduced. Also, because it can achieve weight reduction,
The handling becomes easy, and a plurality of anchor bolts can be installed by a simple operation of standing on the bottom of the pump installation structure, so that the installation workability is improved. Therefore, even if it is a relatively narrow bottom part in the pump installation structure, it can be easily installed with good workability. Further, in the supporting structure of the pre-swirl tank according to the second aspect of the present invention, the pre-swirl tank support plate is supported by a plurality of anchor bolts erected on the bottom, and the pre-swirl tank support plate is pre-swirled via the pre-swirl tank support plate. Since the tank is supported, the same effect as the first aspect can be obtained.

According to a third aspect of the present invention, there is provided a support structure for a pre-swirling tank, wherein a bottom plate having a plurality of anchor bolts erected extends over a hole provided at the bottom of the pump installation structure. Since it is fixed and the pre-swirl tank is supported by the plurality of anchor bolts, the structure is simpler than in the conventional support structure of the pre-swirl tank, the manufacturing workability is improved, and the cost can be reduced. Further, since the weight reduction can be achieved, the handling becomes easy, and the plurality of anchor bolts can be installed by the simple work of erecting on the bottom of the pump installation structure, so that the installation workability is improved. . Therefore, even if it is the bottom of the pump installation structure which is relatively narrow, it can be easily installed with good workability. According to a fourth aspect of the present invention, the pre-swirl tank support structure supports the pre-swirl tank support plate with a plurality of anchor bolts erected on the bottom plate, and pre-swirl through the pre-swirl tank support plate. Since the tank is supported, the same effect as the invention described in claim 3 can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of the invention described in claim 1;

FIG. 2 is a sectional view showing a state in which the discharge curved pipe according to the first aspect of the present invention is supported.

FIG. 3 is a sectional view showing one embodiment of the invention described in claim 2;

FIG. 4 is a sectional view showing a state in which a discharge curved pipe according to the second aspect of the present invention is supported.

FIG. 5 is a sectional view showing one embodiment of the invention described in claim 3;

FIG. 6 is a sectional view showing a state in which a discharge curved pipe according to the third aspect of the invention is supported.

FIG. 7 is a sectional view showing one embodiment of the invention described in claim 4;

FIG. 8 is a cross-sectional view showing a support state of the discharge curved pipe according to the fourth aspect of the invention.

FIG. 9 is a perspective view of a conventional example.

FIG. 10 is a cross-sectional view showing a supporting state of a pre-swirling tank according to a conventional example.

FIG. 11 is an enlarged sectional view showing a state in which a discharge curved pipe is supported according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pre-rotation tank 3 Manhole (structure for pump installation) 3A Bottom part of structure for pump installation 3B hole 4 Anchor bolt 7 Pre-rotation tank support plate 9 Bottom plate

Claims (4)

[Claims] 1. A supporting structure for a pre-swirl tank, wherein the pre-swirl tank is supported by a plurality of anchor bolts erected on the bottom of the pump installation structure. 2. The pre-swirl tub support plate is supported by a plurality of anchor bolts erected on the bottom portion, and the pre-swirl tub support is supported via the pre-swirl tub support plate. The supporting structure of the pre-rotation tank described. 3. A bottom plate on which a plurality of anchor bolts are erected is fixed to the bottom of the pump installation structure so as to straddle a hole provided in the bottom of the pump installation structure, and the plurality of anchor bolts support a pre-swirl tank. A support structure for a pre-swirling tank. 4. The pre-swirl tank support plate is supported by a plurality of anchor bolts erected on the bottom plate, and the pre-swirl tank support is supported via the pre-swirl tank support plate. The supporting structure of the pre-rotation tank described.