JP3082018B2 - Retrofit swivel tank made of reinforced plastic - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retrofitted pre-swirl tank made of reinforced plastic, and more particularly, to a manhole or the like installed at an appropriate position in a sewage drainage piping system connecting a sewage generation source and a sewage treatment plant. Inside the suction tank of the pump,
The present invention relates to a retrofitted pre-swirl tank made of reinforced plastic installed at the bottom.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 4, 5 and 6, the bottom of a suction water tank 1 of a pump such as a manhole is installed at an appropriate place in a sewage drainage pipe system connecting a sewage generation source and a sewage treatment plant. There is known a technique of installing a substantially disc-shaped retrofitting pre-swirl tank 2 (hereinafter, simply referred to as a pre-swirl tank) near 1A, which is formed of a reinforced plastic such as FRP. This kind of pre-swirling tank 2 generally has two pumps P
A pair of pre-swirl tanks 2 into which suction ports 3 of P1 and P2 are separately inserted.
A, 2B, that is, the first pre-swirl tank 2A and the second pre-swirl tank 2B
Is provided at one side eccentric position with a predetermined width direction interval, and is provided on the other side of the first pre-swirl tank 2A and the second pre-swirl tank 2B so as to extend in the width direction and protrude from the first partition wall. 4 separates a pre-swirling tank forming area 5 on one side of the first partition wall 4 and a pre-swirling tank non-forming area 6 adjacent to the other side of the first partition wall 4. The second pre-swirl tub 2A and the second pre-swirl tub 2B separately from each other to extend to the pre-swirl tub formation area 5 side.
Are provided, and an inflow passage 8 for communicating the pre-swirl tub non-forming area 6 with the pre-swirl tub 2A and an inflow passage 9 for communicating the pre-swirl tub non-forming area 6 with the pre-swirl tub 2B. Is formed. Also, the pump P1,
Mounting portions 10 for mounting and fixing the discharge bend 13 are provided.

In a suction water tank 1 of a pump in which a pre-swirling tank 2 having such a structure is retrofitted and installed at the bottom, two pumps P
1, P2 are operated alternately. For example, by operating the first pump P1, the sewage in the suction water tank 1 is sucked up from the suction port 3 of the first pump P1, and the water level of the sewage drops below the upper end level of the pre-swirl tank 2 Flows into the first pre-swirl tank 2A through the inflow passage 8 and is sucked up by the first pump P1 while pre-swirl. Also, the second
Is operated, the sewage in the suction tank 1 is sucked up from the suction port 3 of the second pump P1,
After the water level of the sewage falls to or below the upper end level of the pre-swirl tub 2, the sewage flows into the second pre-swirl tub 2B through the inflow passage 9 and is sucked up by the second pump P2 while being pre-swirled. .

[0004] By the way, a substantially disk-shaped pre-swirling tank 2 is shown in FIG.
As shown in the figure, the mounting seats 10, 10 are connected to the suction water tank 1 of the pump.
5 and 6 and is formed between the pre-swirl tub 2 of FIG. 5 and FIG. 6 and the inner surface of the peripheral wall 1B of the suction water tub 1 of the pump in the erected and fixed state. The gap 14 formed between the one end side and the other end side of the substantially disk-shaped pre-swirling tank 2 and the inner surface of the peripheral wall 1B of the suction tank 1 of the pump, specifically the suction tank 1 of the pump. Of inner wall 1B, upper surface of bottom 1A and pre-rotation tank 2
Mortar or concrete 12 is placed in the space surrounded by the mortar or concrete 12 and is placed near the bottom 1A of the suction tank 1 of the pump.
After curing, the discharge bends 13 of the pumps P1 and P2 are mounted on the mounting seats 10 and fixed.

However, in a system in which mortar or concrete 12 is cast from gaps 14 formed between one end side and the other end side of the pre-swirling tank 2 and the inner surface of the peripheral wall 1B of the suction water tank 1 of the pump, The operation of uniformly placing the pre-swirl tank 2 at a long distance from the bases 14, 14, that is, the vicinity of the mounting seats 10, 10 is complicated. In addition, escape of the air existing in the space is hindered, and there is a possibility that an air layer may remain in the mortar or the concrete 12 casting portion. For this reason, there is a disadvantage that an uneven driving state is likely to occur, and there is a disadvantage that the uneven driving state cannot be confirmed.

[0006]

That is, in the conventional retrofitted pre-swirl tank made of reinforced plastic, the work of uniformly casting the center of the pre-swirl tank, which is long from the gap, is complicated, and the air is not easily removed. Escape is hindered, and there is a risk that an air layer may remain in the mortar or concrete casting portion. There are also difficulties that cannot be confirmed. Therefore, according to the invention of claim 1, a uniform operation of mortar or concrete is ensured by a simple operation, the remaining of the air layer can be eliminated, and the operation of the plastic can be confirmed. It is an object of the present invention to provide a retrofitting pre-swirl tank.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of pre-swirl tanks into which suction ports of a plurality of pumps are separately inserted are provided at predetermined eccentric positions on one side. The mounting seat, which is recessed with an interval in the width direction and on which a mounting seat on which a plurality of pump individual mounting portions are mounted is provided in the vicinity of each of the plurality of pre-swirling tanks, Is fixed to a gantry that is erected at the bottom of the suction tank of the pump, and the suction tank of the pump is removed from the gap formed between the plate-shaped body and the inner surface of the peripheral wall of the suction tank of the pump in the fixed state. In a retrofitted pre-swirl tank made of reinforced plastic installed near the bottom of the suction water tank of the pump by casting mortar or concrete in the space surrounded by the inner surface of the peripheral wall, the upper surface of the bottom, and the plate-like body, The seat is cut out to form a through hole In which was characterized by Rukoto. According to the first aspect of the present invention, the gap formed between the retrofitting pre-swirling tank formed of a disk-shaped body and the inner surface of the peripheral wall of the suction water tank of the pump and the through hole formed by cutting out the mounting seat are formed. Mortar or concrete can be poured into the space surrounded by the inner surface of the peripheral wall of the suction tank of the pump, the upper surface of the bottom portion, and the disk-shaped body. In addition, the through hole functions as an air escape hole, and can be used as an insertion hole for a stirring rod of a stirrer to stir mortar or concrete during a casting operation. In addition, the through hole also functions as a window for checking the mortar or concrete casting state.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; The feature of the first aspect of the present invention is a structure in which the mounting seat is cut out to form a through hole, and other structures and operations are the same as those of the conventional example shown in FIGS. Descriptions other than the seat and the notch will be omitted, and the same parts as those in the conventional example will be described using the same reference numerals.

In FIGS. 1 and 2, the mounting seats 10, 10 located substantially at the center of the pre-swirling tank 2 are largely cut out to form through holes 15. Therefore, as shown in FIG. 3, the mounting seats 10, 10 are connected to the bottom 1A of the suction water tank 1 of the pump.
After being erected on the gantry 11 and temporarily fixed,
In this fixed state, mortar or concrete 12 can be cast from the gaps 14, 14 at one end and the other end of the pre-swirl tank 2 in FIGS. 1 and 2 and the through holes 15 of the mounting seats 10, 10. it can.

Therefore, the peripheral wall 1 of the suction water tank 1 of the pump
The mortar or concrete 12 can be easily and uniformly poured over the entire area surrounded by the inner surface B, the upper surface of the bottom 1A, and the pre-rotation tank 2. Further, since the through hole 15 functions as an air escape hole, an air layer does not remain in the mortar or concrete 12 casting portion. In addition, the mortar or concrete 12 can be stirred at the time of casting by using the through hole 15 as an insertion hole of a stirring rod of a stirrer (not shown), so that uniform casting can be reliably performed. Further, the state of the mortar or concrete 12 can be confirmed from the through holes 15. That is, the through hole 15 also functions as a window for confirming the mortar or concrete 12 placement state.

In the above-described embodiment, the description has been made using the pre-swirl tank 2 of a single molding.
The present invention can also be applied to the pre-swirl tank 2 in which the upper surface 7A and the region on the extension of the upper surface 7A are divided into two parts, and the two parts are integrally joined.

[0012]

As described above, according to the first aspect of the present invention, the gap formed between the disk-shaped body and the inner surface of the peripheral wall of the suction tank of the pump and the through hole formed by cutting out the mounting seat are provided. Mortar or concrete can be cast from the inside of the pump, so that mortar or concrete can be easily and uniformly poured over the inner surface of the peripheral wall of the suction tank of the pump, the upper surface of the bottom portion, and the entire space surrounded by the pre-swirling tank.
Further, since the through holes function as air release holes, no air layer remains in the mortar or concrete casting portion. In addition, since the mortar or concrete can be stirred at the time of casting by using the through hole as an insertion hole of the stirring rod of the stirrer, uniform casting can be reliably performed. Further, the state of the mortar or concrete can be confirmed from the through holes.

[Brief description of the drawings]

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

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged cross-sectional view showing a state in which a pre-swirl tank is erected and fixed.

FIG. 4 is a perspective view of a retrofit pre-swirl tank.

FIG. 5 is a plan view of a retrofit pre-swirl tank.

FIG. 6 is a longitudinal sectional view showing a state in which a retrofit type pre-swirl tank is installed in a pump suction water tank.

FIG. 7 is an enlarged sectional view showing a conventional pre-swirl tank installed and fixed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump suction water tank 1A Bottom part of pump suction water tank 1B Peripheral wall of pump suction water tank 2 Retrofit type pre-rotation tank (board-like body) 2A 1st pre-rotation tank 2B 2nd pre-rotation tank 3 Pump suction port 10 Seat 11 Stand 12 Mortar or concrete 13 Pump discharge head (pump mounting part) 14 Gap 15 Through hole P1 Pump P2 Pump

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Iwao Imoto 1-1-1 Nakamiya Oike, Hirakata City, Osaka Prefecture Inside Kubota Hirakata Plant Co., Ltd. (72) Inventor Shiro Nakahara 1-1-1 Nakamiya Oike, Hirakata City, Osaka Prefecture No. Kubota Hirakata Factory Co., Ltd. (72) Nao Miyauchi 1-1-1, Nakamiya Oike, Hirakata City, Osaka Prefecture Kubota Hirakata Factory Co., Ltd. (56) References JP-A-6-280300 (JP, A) (58) ) Surveyed field (Int.Cl. ⁷ , DB name) E03F 1/00-11/00

Claims (1)

(57) [Claims] 1. A plurality of pre-swirling tanks into which suction ports of a plurality of pumps are separately inserted are recessed at one side eccentric position with a predetermined width direction interval, and mounting portions of the plurality of pumps are individually mounted. After the mounting seat on which the mounting seat is mounted is formed of a plate-like body provided in the vicinity of each of the plurality of pre-swirling tanks, and the mounting seat described above is fixedly mounted on a gantry that is erected at the bottom of the suction water tank of the pump, The mortar or concrete is filled into the space surrounded by the inner surface of the peripheral wall of the suction water tank of the pump, the upper surface of the bottom part, and the disk-shaped body through a gap formed between the plate-like body and the inner peripheral surface of the suction water tank of the pump in the fixed state. In a retrofitted pre-revolving tank made of reinforced plastic which is cast and installed near the bottom of the suction tank of the pump, a through hole is formed by notching the seat described above. A retro-rotating pre-swirling tank.