JP3004799U - Submersible pump device - Google Patents

Abstract

(57) [Summary] [Structure] This is a submersible pump device that is located in the cast-in-place pile hole and discharges the sand and mud accumulated at the bottom of the cast-in-place pile hole through the Tremi pipe connected to the upper and lower parts of the pump. The pump 20 is fixed in the casing 10 so that the center of gravity of the entire device is located on or near the center line of the submersible pump device, and the casing is formed into a cylindrical shape, and a flange for connecting the Tremi tubes 2 and 3 is provided. 12a and 14a are formed integrally with the casing 10 or fixed to the casing 10 by a support member 15. [Effect] When the pump device is hung by a crane and positioned in the cast-in-place pile hole, the balance of the pump device is improved to prevent the pump device from tilting, and the outer peripheral surface of the pump device is smoothed to slightly contact the inner wall. It prevents the inner wall from collapsing, and further prevents the pump from being destroyed due to the weight of the Tremi tube.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a submersible pump device used in the construction of cast-in-place piles, and is particularly suitable for connecting to the middle of a toremi pipe and discharging slime (sand mud) accumulated at the bottom of the cast-in-place pile holes. Submersible pump device.

[0002]

[Prior art]

 In recent years, "cast-in-place piles" are often used as the foundations of structures instead of "prepared pile foundations" in which ready-made piles are driven into the ground from the viewpoint of preventing noise and vibration. This "in-place pile" is a pile made by excavating the ground to a necessary depth to form a hole and filling the hole with concrete.

Conventionally, various construction methods have been known as construction methods for cast-in-place piles. Among the construction methods, there is a construction method in which water or bentonite solution is filled inside the holes. For example, in the reverse circulation method, without using caging (iron pipe that is driven into the ground to protect the hole wall), the hole wall is protected by hydrostatic pressure, while excavating with a rotating bit and scraped off. This is a method in which sand mud (sediment water) is sucked up from a pipe inserted in the hole and discharged to the ground while excavating the hole. Water is supplied between the pipe and the wall of the hole, and water is sent to the bottom of the hole through the space between the pipe and the wall of the hole, so that the inside of the hole is always filled with still water.

The earth drill method is a method in which a rotary bucket is used to scrape earth and sand, a bucket that is full is pulled up to the ground and the earth and sand are discharged, and the excavation is carried out by repeating this. In this case, if there is a risk of collapsing the drill hole, use a bentonite solution to protect the hole wall.

In the above-mentioned reverse circulation method and earth drill method using bentonite solution, after drilling a hole, a tremie pipe is inserted to the bottom of the hole, and concrete is poured into the bottom of the hole through the tremi pipe (placing). ) Procedure.

However, in the above-described conventional method of constructing a cast-in-place pile, sand mud (slime) accumulates at the bottom of the hole, and this slime adversely affects the properties of the pile. The tremie tube is inserted up to and the slime accumulated at the bottom is sucked up with a pump and discharged. In this case, the pump is placed in the water in the excavated hole to increase the head.

[0007]

[Problems to be solved by the device]

 However, the conventional submersible pump used for discharging slime has an asymmetrical shape as shown in Fig. 4, and the flanges 2a and 3a connecting the tremie tubes 2 and 3 are also deviated from the center. Therefore, the center of gravity is not located on the center line of the pump. Therefore, when the submersible pump 5 and the tremie pipes 2 and 3 are put in or taken out from the cast-in-place pile hole 1 as shown in FIG. It may end up. In this way, when the pump 5 and the Tremi tubes 2 and 3 incline in the hole, the pump 5 and the Tremi tube 2 and 3 come into contact with the inner wall of the hole 1 and collapse the inner wall, as shown in FIG. There was a problem such as losing. In addition, since the conventional pump has many irregularities in the outer shape, there is a problem that the inner wall is destroyed even if it slightly contacts the inner wall. Furthermore, since the pump is connected to the tremie pipe, the weight of the tremie pipe 2 connected to the lower part of the pump 5 is directly applied to the lower flange 2a of the pump, and the tremie pipe 2 at the lower part of the pump and the pump 5 itself are connected. Since the weight is directly applied to the upper flange 3a of the pump 5, there is a problem that the flanges 2a and 3a of the pump 5 are broken when a large number of tremie pipes are connected.

The present invention has been made to solve these problems, and the center of gravity is located almost on the center line of the pump device to improve the balance when the device is suspended by a crane or the like. In addition to preventing tilting, make the outer peripheral surface of the pump device as smooth as possible by removing the concave and convex parts so that the inner wall will not collapse even if it contacts the inner wall to some extent. By doing so, it is an object of the present invention to provide a submersible pump device that prevents the breakdown of the pump due to the weight of the Tremi tube.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the submersible pump device of the present invention is located in the cast-in-place pile hole and is a submersible pump device that discharges the sand and mud accumulated at the bottom of the hole through the Tremi pipe connected to the upper and lower parts of the pump. The pump is housed in a casing, and preferably the pump is fixed in the casing so that the center of gravity of the entire device is located on or near the center line of the submersible pump device. Also, the casing is formed in a cylindrical shape, and the flange is formed integrally with the casing or fixed to the casing so as to connect the tremie pipe. Further, a plurality of water passage holes are provided on the outer peripheral surface of the casing.

[0010]

[Action]

 According to the submersible system having the above-mentioned configuration, the pump device and the tremie pipe can be put in and out of the cast-in-place pile hole while keeping the vertical state, and the pump device and the tremie pipe do not come into contact with the inner wall of the hole. In addition, the weight of the connected toremi tube is received by the casing.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view of the appearance of the submersible pump device of this embodiment, and FIG. 2 is a front view of the casing portion in FIG. In these drawings, 10 is a casing, and 20 is a submersible pump housed in the casing 10. The casing 10 is formed in a cylindrical shape, and the submersible pump 20 is fixed to the bottom surface thereof. This fixing is performed by bolting a mounting plate 21 fixed to the bottom of the submersible pump 20 with a bolt through a long hole 11 provided in the bottom surface of the casing 10. Further, at the center of the bottom surface of the casing 10, a suction portion 12 having a lower flange 12a for connecting the tremie pipe 3 is integrally formed with the casing. The suction port 22 of the pump 20, the hole 21a of the mounting plate 21, and the suction portion 12 are aligned with each other.

A hole 13 is provided at the center of the upper surface of the casing 10, and a discharge portion 14 of the pump 20 projects above the casing 10 through the hole 13. Further, the discharge part 14 and the outlet of the pump 20 are connected by a bent pipe so that the discharge part 14 becomes the center of the casing 10. Further, an upper flange 14a for connecting the Tremi tube 3 is also provided at the tip of the discharge portion 14, and the upper flange 14a is fixed to the upper surface of the casing 10 by a supporting member 15.

To adjust the position of the center of gravity, the relative position of the casing 10 and the submersible pump 20 is changed by shifting the position of the mounting plate 21 so that the center of gravity of the entire pump device is located on the center line of the pump device. To do. The position of the center of gravity may be adjusted by slightly changing the shape of the pump or by attaching an adjusting weight to the casing. If the position of the center of gravity deviates slightly from the center line of the pump device, the balance will not be lost when the pump device is suspended, so the position of the center of gravity does not necessarily have to coincide with the center line.

A plurality of water passage holes 16 are provided on the upper and lower portions of the circular outer peripheral surface of the casing 10. This water passage hole 16 quickly guides the water in the hole 1 to the inside of the casing 10 when the pump device is put into the cast-in-place pile hole 1, so that the casing is quickly submerged in water (in the hole 1). Also, when the pump device is pulled up from the cast-in-place pile hole 1, slime and water inside the casing 10 are quickly discharged.

According to the device of the present invention having such a configuration, the lower flange 12a of the suction portion 12 protruding from the bottom surface of the casing 10 and the upper flange 14a of the discharge portion 14 protruding from the upper surface. Suspend the pump device, which is connected to the Torremi pipes 2 and 3, respectively, with a crane or the like, and insert them into the cast-in-place pile hole 1 in order. At this time, the pump device is in a balanced state, so that the tremie tubes 2, 3 and the pump device are maintained in a vertical state as shown in FIG. Therefore, the pump device and the Tremi tubes 2 and 3 do not tilt and come into contact with the inner wall of the hole 1.

Further, since the casing 10 of the pump device has a cylindrical shape, even if the casing 10 slightly contacts the wall surface of the hole 1, the wall surface does not collapse. Further, the Tremi tube 2 connected to the lower portion of the pump device is firmly supported by the casing 10 via the lower flange 12a, and the upper flange 14a that bears the weight of the pump device and the lower Tremi tube 2 is supported by the support member 15a. It is firmly supported by the casing 10 via.

It should be noted that the present invention is not limited to the above embodiments, but includes various modifications within the scope of the gist. For example, the suction portion 12 and the lower flange 12a are protruded from the lower portion of the casing 10 in a state where the suction portion 12 is connected to the pump 20 like the discharge portion 14 and the upper flange 14a, and the suction portion 12 or the lower flange 12a. Can be fixed to the casing 10 by a supporting member.

[0018]

[Effect of device]

 As described above, according to the submersible pump device of the present invention, the center of gravity is located almost on the center line of the pump device to improve the balance when suspended by a crane or the like and prevent the pump device from tilting. , The pump device or the tremie pipe should not come into contact with the inner wall of the cast-in-place pile hole, and the outer peripheral surface of the pump device should be made smooth so that the inner wall does not collapse even if it contacts the inner wall to some extent. It is possible to prevent the pump from being damaged due to the weight of the tremie tube by integrally forming or directly fixing the flange for connecting with the casing.

[Brief description of drawings]

FIG. 1 is an external perspective view of a submersible pump device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a mode of use of the submersible pump device of FIG.

FIG. 3 is a front view of a cross section of a casing portion of the submersible pump device shown in FIG.

FIG. 4 is a front view of a conventional submersible pump.

FIG. 5 is a diagram showing a usage mode of the submersible pump of FIG. 4.

[Explanation of symbols]

 1 Cast-in-place pile hole 2, 3 Tremi pipe 10 Casing 11 Long hole 12 Suction part 12a Lower flange 14 Discharge part 14a Upper flange 15 Support member 20 Pump 21 Mounting plate

Claims (6)

[Scope of utility model registration request] 1. A submersible pump device which is located in a cast-in-place pile hole and discharges sand and mud accumulated at the bottom of the cast-in-place pile hole through a toremi pipe connected to the upper and lower parts of the pump, A submersible pump device in which a pump is housed in a casing. 2. A submersible pump device which is located in a cast-in-place pile hole and discharges sand and mud accumulated at the bottom of the cast-in-place pile hole through a toremi pipe connected to the upper and lower parts of the pump. A submersible pump device comprising a submersible pump device composed of a pump and a casing, wherein the pump is fixed in the casing such that the center of gravity of the entire device is located on or near the center line of the submersible pump device. 3. The submersible pump device according to claim 1, wherein the casing has a cylindrical shape. 4. The submersible pump device according to claim 1, wherein a lower flange for connecting the tremie pipe is integrally fixed to a casing. 5. The submersible pump device according to claim 1, 2, 3, or 4, wherein an upper flange for connecting the tremie pipe is fixed to the casing by a supporting member. 6. The submersible pump device according to claim 1, wherein a water passage hole is provided on the outer peripheral surface of the casing.