JPS649480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improved method for installing outer cylinder parts of a pull-out type vertical shaft pump so that the pump can be installed using a crane with a small cargo handling capacity.

(Prior Art) FIG. 9 shows a schematic diagram of a pull-out type vertical shaft pump. In FIG. 9, a suction bell 1, an external casing 2, a lift pipe 3, a discharge elbow 4, a short support pipe 5,
The pump base 6 is sequentially assembled to form an outer cylinder component. Then, the pump base 6 of this outer cylindrical part is arranged and fixed to a base liner 8 disposed above the pump suction water tank 7, and the outer cylindrical part is suspended from the pump suction water tank 7. Furthermore, rotating parts 9 such as a wrapper tube, internal casing, and impeller, and inner cylindrical parts such as a shaft 10 and a curved plate 11 are assembled and arranged inside the outer cylindrical part. Further, a motor stand 12 and a motor 13 are assembled to the upper part of the outer cylinder part to form a vertical shaft pump.

By the way, the conventional method of installing the above-mentioned pull-out type vertical pump is as follows. First, the suction bell 1, external casing 2, and lift pipe 3 are
The first assembled body is assembled on the ground as shown in the figure, and this first assembled body is lowered into the pump suction tank 7 by the crane 14, and the upper end of the pumping pipe 3 is disassembled and assembled as shown in Figure 11. Temporarily place it on the base liner 8 using the tool 15. Furthermore, the discharge elbow 4,
The short support pipe 5 and the pump base 6 are assembled on the ground to form a second assembled body, and this second assembled body is lifted by the crane 14 and placed on the first assembled body, and the second assembled body is lifted by the crane 14 and placed on the first assembled body. As shown in the figure, the upper end flange of the first assembly and the lower end flange of the second assembly are connected to assemble the entire outer cylinder part. The entire outer cylindrical part on which the first and second assembled bodies are assembled is lifted by a crane 14, the disassembly and assembly tool 15 is removed, and the first assembled body is separated from the base liner 8. Then, the entire outer cylindrical part is further suspended into the pump suction water tank 7, and the pump base 6 is placed and fixed on the base liner 8 as shown in FIG. 13, and the outer cylindrical part is installed. After installing the outer cylinder part, the inner cylinder part is assembled, and then the motor stand 1 is installed on the top of the outer cylinder part.
2. Assemble the motor 13 to complete the installation of the pull-out vertical shaft pump.

(Problems to be Solved by the Invention) As described above, the hanging crane 14 is used when installing or disassembling the pull-out type vertical pump. The overall weight of the outer cylinder parts is heavy compared to the weight of the inner cylinder parts, etc., and the crane 1
The cargo handling capacity of No. 4 is determined by the weight of the entire outer cylinder part. However, the entire outer cylinder part was removed by crane 14.
The problem is that this is done only when installing a pull-out vertical shaft pump, which is uneconomical from the perspective of reducing equipment costs.

An object of the present invention was to solve the problem that the conventional installation method of the above-mentioned pull-out type vertical shaft pump requires a crane with a large cargo handling capacity and is uneconomical. An object of the present invention is to provide a method for installing an outer cylinder part of a pull-out type vertical shaft pump, in which a vertical shaft pump can be installed.

(Means for Solving the Problems) In order to achieve the above object, the method for installing an outer cylinder part of a pull-out type vertical pump of the present invention provides a method for installing an outer cylinder part of a pull-out type vertical pump according to the present invention. A first step in which the assembled body is suspended and temporarily placed on the bottom of the pump suction water tank, and a second step in which the assembled body, in which a part of the outer cylinder parts including the pump base is assembled, is suspended in the pump suction water tank. a second step of placing and fixing the pump base on a base liner provided above the pump suction water tank; lifting the first assembly; a third step of assembling the entire outer cylindrical part including the second assembly, and installing the outer cylindrical part above the pump suction water tank.

(Function) The second assembled body including the pump base is suspended into the pump suction water tank, the pump base is placed and fixed on the base liner, and the second assembly including the suction bell that was previously suspended into the pump suction water tank is suspended. The first assembled body is lifted up by a crane, connected to the second assembled body, and the outer cylinder parts are installed.
The entire outer cylindrical part does not need to be suspended by a crane, and the outer cylindrical part can be installed using a crane with a small cargo handling capacity.

(Example) Hereinafter, an example of the method for installing outer cylinder parts of a pull-out type vertical shaft pump according to the present invention will be described with reference to FIGS. 1 to 8. 1, 2, 4 to 6 are diagrams showing each step of the installation method of the present invention, respectively,
FIG. 3 is a view taken along arrow A-A in FIG. 2, and FIG. 7 is an external perspective view of the steady rest lifting jig.
FIG. 8 is a diagram illustrating the usage state of the steady rest lifting jig.

First, as shown in FIG. 1, the suction bell 1, the external casing 2, and the pumping pipe 3 are sequentially assembled on the ground to form a first assembly, and a temporary stand 16 that can be disassembled is attached to the bottom of the pump suction water tank 7. Place. Then, the first assembly is lowered into the pump suction water tank 7 by a crane 14 for hanging, and temporarily placed on a temporary storage stand 16 as shown in FIG. Here, in order to prevent the first assembled body temporarily placed on the temporary storage stand 16 from falling over, embedded eye bolts 17, 17, etc. are provided in advance on the side wall of the pump suction water tank 7.
7, 17, . . . and supported by struts 18, wire ropes 19, turnbuckles 20, etc. as shown in FIG.

Next, the discharge elbow 4, the short support pipe 5, and the pump base 6 are sequentially assembled on the ground to form a second assembly, and the second assembly is lowered into the pump suction water tank 7 by the crane 14. , the pump base 6 is placed and fixed on the base liner 8 as shown in FIG.
Furthermore, as shown in FIG. 5, the crane 14 is lowered inside the second assembly and the first assembly is lifted up.
The upper end flange of the water lift pipe 3 of the first assembled body and the lower end flange of the discharge elbow 4 of the second assembled body are abutted and connected to assemble the entire outer cylinder part. When lifting this first assembly, a guide bolt is inserted in advance between the upper end flange of the water pump 3 and the lower end flange of the discharge elbow 4 for guidance. Furthermore, since the first assembled body is lifted using the internal hanging ears 21, 21, etc. provided on the inner wall of the suction bell 1 located below the center of gravity of the first assembled body, as shown in FIG. And a steady rest lifting jig 22 as shown in FIG. 8 is used. This steady rest lifting jig 22 is
Abutment parts 23, 23... that come into contact with the upper inner wall of the wire rope 2 are protruded radially from eye bolts 24, 24... provided on the abutment parts 23, 23...
5, 25... are lowered and connected to internal hanging ears 21, 21... provided on the inner wall of the suction bell 1, and wire ropes 26, 26... are hung from the eye bolts 24, 24... to the crane 14. It is composed of

Finally, the temporary stand 16 placed on the bottom of the pump suction water tank 7 is disassembled, and the crane 14 lowered inside the first and second assembled bodies lifts up the disassembled components and takes them out to the ground. Complete the installation of the outer cylinder parts as shown in Figure 6.

After the outer cylindrical parts are installed in this way, the inner cylindrical parts, the motor stand 12, and the motor 13 are assembled using a method similar to the conventional method, thereby completing the installation of the pull-out type vertical shaft pump.

In this installation method, the entire outer cylindrical part consisting of the first and second assemblies is not suspended by the crane 14, and the first and second assemblies can be hung individually as much as possible. The outer cylinder parts can be installed using a crane 14 with a cargo handling capacity of . Therefore, the cargo handling capacity of the crane 14 can be determined by the maximum weight of any one of the first and second assembled bodies, the inner cylinder part, the motor, and other components that are lighter than the total weight of the outer cylinder part. Furthermore, the cargo handling capacity of the crane 14 can be made smaller than in the past, and the equipment cost can be reduced accordingly. Being able to reduce the cargo handling capacity of the crane 14 not only makes the crane 14 itself less expensive, but also makes it possible to construct a building that supports the crane 14 at a lower cost without requiring strength.

In the above embodiment, the first assembly includes the suction bell 1, the outer casing 2, and the pumping pipe 3, and the discharge elbow 4, the short support pipe 5, and the pump base 6 are assembled in order. The outer cylindrical parts are separated into the second assembly body and the pump suction water tank 7.
Although the method for suspending is explained above, the method is not limited to this, and the structure of the first and second assembled bodies may be appropriately changed to a structure different from that of the above embodiment, and the outer cylindrical parts may be changed as appropriate. Alternatively, the assembly may be divided into a plurality of assembled bodies and lowered into the pump suction water tank one after another, and then lifted up one after another to assemble the entire outer cylindrical part. Furthermore, it goes without saying that the method for installing the outer cylinder component of the present invention can be applied to any pull-out type vertical shaft pump, such as a vertical shaft axial flow pump or a vertical shaft mixed flow pump.

(Effects of the Invention) As explained above, the method for installing the outer cylinder part of a pull-out type vertical pump according to the present invention involves lowering the second assembled body including the pump base into the pump suction water tank. The pump base is placed and fixed on the base liner, and the first pump is assembled including the suction bell that was previously suspended in the pump suction tank.
The first assembly is lifted by a crane, connected to the second assembly, the entire outer cylinder part is assembled, and the outer cylinder part is installed above the pump suction water tank, so the entire outer cylinder part is suspended by a crane. The outer cylinder parts can be installed using a crane with a small cargo handling capacity. Therefore, an excellent effect is achieved in that the cost of equipment such as the crane and the building supporting the crane can be reduced.

[Brief explanation of the drawing]

Figures 1 to 8 are diagrams for explaining an embodiment of the method for installing outer cylinder parts of a pull-out type vertical pump of the present invention, and Figure 1 shows the process of assembling the first assembly on the ground. FIG. 2 is a diagram showing the first
FIG. 3 is a view taken along arrow A-A in FIG. 2, and FIG. , FIG. 5 is a diagram showing the process of placing and fixing the second assembly on the base liner, FIG. 5 is a diagram showing the process of lifting the first assembly, and FIG. 6 is a diagram showing the process of lifting the first assembly. FIG. 7 is a perspective view of the appearance of the steady rest lifting jig, and FIG. 8 is a diagram illustrating how the steady rest lifting jig is used. FIG. 9 is a schematic diagram of a pull-out type vertical shaft pump. 10 to 13 are diagrams explaining an example of a method for installing the outer cylinder part of a conventional pull-out type vertical shaft pump, and FIG. 10 is a diagram showing a process of assembling the first assembly on the ground. FIG. 11 is a diagram showing the process of temporarily placing the first assembly on the base liner of the pump suction water tank, and FIG. 12 is a diagram showing the process of temporarily placing the first assembly on the base liner of the pump suction water tank. FIG. 13 is a diagram showing the process of connecting the bodies, and FIG. 13 is a diagram showing the process of suspending the entire outer cylinder component and placing it on the base liner. 1: Suction bell, 2: External casing, 3: Lift pipe, 4: Discharge elbow, 5: Support short pipe, 6: Pump base, 7: Pump suction tank, 8: Base liner, 14: Crane, 16: Temporary Stand.

Claims (1)

[Claims] 1. A first step of suspending and temporarily placing a first assembled body, in which a part of the outer cylindrical parts including the suction bell is assembled, on the bottom of the pump suction tank, and a pump base. A second assembly in which a part of the outer cylinder part is assembled is suspended onto the pump suction water tank, and the pump base is placed and fixed on a base liner provided above the pump suction water tank. a third step of lifting the first assembly and assembling the entire outer cylinder part including the first assembly and the second assembly; A method for installing an outer cylindrical part of a pull-out type vertical shaft pump, the method comprising: installing an outer cylinder part above the pump suction water tank. 2. In the first step, the first assembled body, in which the suction bell, the external casing, and the water pumping pipe are assembled in sequence, is suspended and temporarily placed on a temporary stand placed on the bottom of the pump suction water tank, and A second step is to suspend a second assembled body in which a discharge elbow, a short support pipe, and a pump base are sequentially assembled into the pump suction tank, and install the pump base above the pump suction tank. and the third step is to lift the first assembled body and bring the upper end of the first assembled body into contact with the lower end of the second assembled body. The method for installing an outer cylinder part of a pull-out type vertical shaft pump according to claim 1, characterized in that the outer cylinder part is connected and assembled as a whole, and the outer cylinder part is installed above the pump suction water tank.