JPH09105243A - Method for installing lining material for large tank and working carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability and to shorten the construction period by elevating a working stage mounted on a carrier, which moves on the bottom surface of a tank, and arranging a lining material such as a cold reserving panel and a membrane in the inner surface of a roof and the inner surface of a side wall of the tank. SOLUTION: A working carrier A is moved and fixed to the bottom of a tank C, and cold reserving panels are installed over from the lowest stage to the highest stage in order with a rise of a working stage 5. Next, the carrier A is moved along a side wall in the circumferential direction, and the cold reserving panels are installed over from the lowest stage to the highest stage in order, and the cold reserving panels are installed in all the circumference of the side wall. Membrane long panels 19 are hoisted by using a group of rollers, and after installing the cold reserving panel at the highest stage, the working stage 5 is operated for lowering in order, and the penal installation of the same line is performed. Next, the carrier A is moved in the circumferential direction along the side wall, and the panels 19 is installed in order by using a hoisting device 20 and a group of rollers 7. Installation of membrane in all the circumference of the side wall is thereby completed, and the workability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an improvement in a method of installing a lining material in a large storage tank such as an underground storage tank.

[0002]

2. Description of the Related Art Generally, when working on the inner surface of a roof of a large storage tank, a scaffold is constructed from the bottom of the storage tank to a workable height according to the inclination of the roof, and a cooling panel, a membrane, and the like are installed using the scaffold. Alternatively, as another method, construct a suspended work scaffold suspended from the roof on the entire inner surface of the roof,
Use the scaffold to install cold insulation panels and membranes. Also, the work of the side wall of the large storage tank is performed using a gondola scaffold. Specifically, a rail for a gondola and a hoist is installed near the outermost top of the inner surface of the roof, and the gondola and the hoist are set on the rail. . The worker in the gondola raises the gondola and stops at a predetermined position. After that, the hoist is operated and the cold insulation panel is lifted to a predetermined position and installed. Next, installation from the lowermost stage to the uppermost stage is performed in the same manner. This work is sequentially performed along the side wall in the circumferential direction to complete the installation of the cold insulation panel on the side wall. After installing the cold insulation panel, install the membrane on the surface. The construction method first raises the gondola to the uppermost installation position, then operates the hoist to pass the membrane between the cold insulation panel and the gondola, and lifts up to the installation position for installation. This installation operation is sequentially repeated while lowering the gondola to complete the installation in one vertical line. After completion, the gondola is moved laterally in the circumferential direction, and the above-mentioned installation work is repeated to complete the installation of the membrane. (For example, JP-A-57-155478, Japanese Patent Publication No. 3-30
(See Japanese Patent Publication No. 35)

[0003]

In the conventional working method as described above, the construction of the working scaffold was indispensable as described above. However, building and dismantling scaffolds requires a lot of time and effort. Also, the work on the side wall is unstable work on the gondola, and there is a problem in workability and safety.

An object of the present invention is to provide a method of installing a lining material in a large storage tank which is excellent in workability and safety.

[0005]

[Means for Solving the Problems] The above-mentioned object is to use a work stage mounted on a trolley that moves on the bottom surface of a storage tank to move up and down, and to provide a cold insulation panel on the inner surface of the roof and the inner surface of the side wall of the storage tank.
It is achieved by installing a lining material such as a membrane. The above-mentioned purpose is to install a plurality of masts around the self-propelled bogie, and to provide a work stage that can be moved up and down using each of these masts as a guide. This is achieved by providing a transport guide means for feeding the panel.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION With reference to the drawings, the details of a work trolley used for carrying out the method for installing a lining material according to an embodiment of the present invention will be described. 1 is a perspective view of a work cart showing a suspended state of a long membrane panel, FIG. 2 is a side view of FIG.
3 is a front view of FIG. 1, FIG. 4 is a plan view of a work carriage, FIG. 5 is an explanatory view of a feed roller portion of a long membrane panel, and FIG. 6 is an explanation showing a state in which a cold insulation panel is installed on the inner surface of a storage tank side wall portion. FIG. 7 and FIG. 7 are explanatory views showing a state in which the lining material is installed on the inner surface of the roof.

A shown in the figure is a work carriage used for carrying out the installation method of the lining material in the large-sized storage tank of the present invention, and the work carriage A is constructed as follows.
Reference numeral 1 is a self-propelled trolley in which drive wheels 2 are mounted on both sides of one side and steering driven wheels 3 are rotatably mounted on the other side ends. The four corners of the trolley 1 are simply joined by bolts (not shown). With a prismatic block structure that can be easily assembled with, a mast 4 having a required height is erected, and a work stage 5 that moves up and down with the already assembled mast 4 as a guide is provided on the carriage 1. It is provided. The operation of raising and lowering the work stage 5 mounted on the mast 4 is performed, for example, by a rack gear (not shown) provided over substantially the entire length of one side surface of the mast 4,
This is performed by a lifting drive means or the like which is composed of a pinion (not shown) of a drive device mounted on the work stage 5 which meshes with this. In addition, transport guide means B for lightly sending a heavy object is disposed on the upper surface of the carriage 1, specifically, on substantially the entire upper surface between the left and right masts 4 erected on the carriage 1. As shown in FIGS. 4 and 5, the transport guide B means includes a plurality of shafts 6 provided on the carriage 1 along an axial direction orthogonal to the front-rear axis direction of the carriage 1. And a roller 7 made of synthetic resin is rotatably provided. Reference numeral 8 shown in FIG. 1 is a motor for driving the drive wheels 2 to rotate forward and backward, 9 is a turning shaft around which the driven wheels 3 are mounted, and 10 is a steering wheel. Also, as shown in FIG.
On the working stage 5, an assembly scaffold 12 made of a pipe material 11 is constructed as required.

[0008]

Example First, referring to FIG. 7, the steel roof 13 of the storage tank C is shown.
A method of installing a lining material such as the cold insulation panel 14 and the membrane 15 on the inner surface will be described. The work cart A is moved onto the bottom of the storage tank just below the roof work surface. Next, a worker is placed on the work stage 5 in a descending posture, tools, equipment and the like necessary for installation work are loaded, and then the work stage 5 is raised to the work surface, and the work stage 5 is fixed. After the fixing is completed, the scaffold 12 is made of pipe material 11 on the work stage 5 so that the inner surface construction work of the steel roof 13 is facilitated.
To assemble the work stage 5 and maintain the cold insulation panel 14
Start the installation work. For the installation work of the cold insulation panel 14, the worker goes up to the assembly scaffold 12, and the anchor bolts 16 already attached to the steel roof 13 by manual work.
The cold insulation panel 14 is attached to and fixed by the nut 17. When the installation of the cold insulation panels 14 within the workable range of the work stage 5 is completed in sequence, the work stage 5 is lowered and the work carriage A is moved to the joint work position. Thereafter, the work carriage A is similarly moved and the work stage 5 is repeatedly moved up and down, and if the cold insulation panel 14 is installed, the installation of the cold insulation panel 14 on the entire inner surface of the steel roof 13 is completed. Next, a membrane 15 serving as a lining material is installed on the cold insulating wall configured by installing the cold insulating panel 14. First, the work carriage A is operated in the same manner as the installation method of the cold insulation panel 14 to install the membrane 15, and the membrane 15 is installed on the entire inner surface of the steel roof 13 through the cold insulation wall, and if this work is completed. Next, the work proceeds to the side wall of the concrete skeleton 18 that constitutes the storage tank C. Since the assembly scaffold 12 is unnecessary for this side wall work, the assembly scaffold 12 should be removed, and the height of the mast 4 should be adjusted to the concrete frame 1
It is desirable to adjust the height to 8.

The work of installing the lining material on the side wall of the concrete frame 18 is performed by first moving the work frame A so that the work stage 5 constituting the work frame A and the side wall of the concrete frame 18 are at a predetermined distance. And fixed to the bottom of the storage tank C. Next, as shown in FIG. 6, the cooling panel 14 is installed from the lowermost stage to the uppermost stage sequentially while raising the work stage 5, and after the installation of the uppermost cold insulating panel 14 is completed, the work stage 5 is mounted. Descend to complete the installation work for that row. As described above, the work cart A is moved in the circumferential direction by a predetermined distance along the side wall, and the cold insulation panels 14 are sequentially installed from the lowermost stage to the uppermost stage. I do. Next, the work of installing the membrane on the surface of the cold insulation panel 14 will be described in detail. In recent years, due to the development of a stainless steel material having a low coefficient of thermal expansion, a long panel-shaped membrane having no corrugation has been used. The installation work of the membrane long panel 19 will be described. The correspondence between the work stage 5 and the cold insulation panel 14 by moving the work carriage A is the same as the installation work of the cold insulation panel 14 described above. Numeral 19 is suspended by using a group of rollers 7 which constitute the conveyance guide means B provided on the carriage 1. First, the lifting device 2 is attached to one end of the long membrane panel.
Two wires 21 of 0 are connected. At that time, the work stage 5 is raised to secure a space for hanging the membrane long panel 19. A worker on the roof of the storage tank operates the hoisting device 20 to hoist the long membrane panel 19 so as to slide on the rollers 7.
After lifting to the specified position, stop. After the long membrane panel 19 is installed on the uppermost cold insulation panel 14, the work stage 5 is operated to sequentially lower it to finish the installation work in the same row. After the installation work in the same row is finished, the work carriage A is moved in the circumferential direction along the side wall, and the lifting device 20 and the group of rollers 7 are used to form the long membrane panel 19.
By sequentially performing the installation work of, the membrane installation on the entire circumference of the side wall is completed. In carrying out this installation work, it is necessary to dispose the lifting devices 20 at positions corresponding to the movement of the work carriage A.

In the installation work of the membrane long panel 19, the method of installing the work carriage A while sequentially moving it along the circumferential direction has been described, but there is also an installation method shown in FIG. 7 as another construction method. Next, the installation method will be described. The work cart A is fixed at a position corresponding to the lifting device 20. Then, the membrane long panel 19 lifted by the lifting device 20 in the same manner as described above is transferred to a hoist 22 movably suspended on an annular rail 21 disposed below the peripheral edge of the steel roof 13. The transferred membrane long panel 19 is moved to a predetermined position by the hoist 22. After the entire perimeter of the side wall is covered by sequentially operating the membrane long panel 19 by the same operation, the membrane long panel 19 is flowed from the uppermost stage to the lowermost cold insulation panel 14 by a plurality of work vehicles A. The installation of all the membrane long panels 19 is completed by performing the same installation work while sequentially moving each work carriage A.

[0011]

According to the configuration of the present invention as described above,
The following effects can be obtained. (A) Using a lifting work stage mounted on a trolley that moves on the bottom of the storage tank, installation work of lining materials such as cold insulation panels and membranes on the inner surface of the roof of the storage tank and the inner surface of the side wall can be performed on one work trolley. Since it does not require a scaffold for work to construct and dismantle as much time and effort as in the conventional technology, it has improved workability and drastically shortened construction period. Can be achieved. (B) When suspending a long membrane panel, by using rollers on the carriage, it is possible to suspend and install the long membrane panel easily and in a short time without using a dedicated jig. It is possible to improve the cleaning workability and shorten the construction period.

[Brief description of the drawings]

FIG. 1 is a perspective view of a work cart showing a suspended state of a long membrane panel.

FIG. 2 is a side view of FIG.

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a plan view of a work carriage.

FIG. 5 is an explanatory view of a feed roller portion of the membrane long panel.

FIG. 6 is an explanatory view showing a state in which a cool panel is installed on the inner surface of the storage tank side wall.

FIG. 7 is an explanatory view showing a state in which a lining material is installed on the inner surface of the roof.

[Explanation of symbols]

 A work trolley B transport guide means 1 trolley 2 drive wheel 3 driven wheel 4 mast 5 work stage 6 shaft rod 7 roller 8 motor 9 turning shaft 10 steering handle 11 pipe material 12 assembly scaffolding 13 steel roof 14 cold insulation panel 15 membrane 16 anchor Bolts 17 Nuts 18 Concrete frame 19 Membrane long panels 20 Lifting equipment 21 Wires 22 Hoists

Claims (2)

[Claims] 1. A lining material such as a cold insulation panel and a membrane is installed on an inner surface of a roof and a side wall of a storage tank by using an ascending / descending work stage mounted on a trolley that moves on the bottom surface of the storage tank. Installation method and work cart for lining materials in large storage tanks. 2. A plurality of masts are erected on the periphery of a self-propelled bogie, and a work stage using each of the masts as a guide is provided to be movable up and down, while a membrane length is provided on the upper surface of the bogie. A trolley for installing a lining material in a large-sized storage tank, which is provided with a transport guide means for feeding the length panel.