JPS595025B2 - Cylindrical structure inner lining method - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the creation of a method for lining the inner surface of a cylindrical structure,
It is an object of the present invention to provide a method for smoothly and efficiently lining the inner surface of a cylindrical structure such as a chimney.

A chimney-like tube. As a method of constructing a cylindrical structure, the spraying method has been used as a conventional and general construction method, but the spraying process is used to construct a cylindrical structure with only the reinforcing material assembled on the outer formwork or outer skin. A gondola on which a worker or the like can ride is installed in the middle part so that it can be raised and lowered, and the worker on this gondola performs spraying work by grasping the nozzle at the end of the spray material supply hose that is fed under pressure from the supply section. This method is limited in the construction range to which it can be applied, and the layer thickness must be determined by the worker's mere intuition, so it is almost impossible to obtain a uniform thickness for the resulting structure. At the same time, since the number of workers is limited and the spraying work is carried out within the outer shell or outer formwork, the generation of dust is extremely undesirable from the sanitary point of view of the working environment. The dust generated obstructs visibility during spraying work, resulting in a considerable drop in work efficiency and the inability to perform work accurately. In addition, since such construction requires work at heights of at least 50 meters (or more than 100+ meters), there is a high risk of accidents caused by workers or equipment falling. No 0
The present invention has been developed through research to eliminate the disadvantages and shortcomings of the conventional methods as described above. The outline of the equipment configuration for implementing this is shown in Figure 1! 5, the hull body 30 is formed by the lifting member 49 suspended from the top of the shell structure 50 of the cylindrical structure, which is formed by assembling the required reinforcement on the outer skin. It is set at the center position of the cylindrical structure 60 to be used, and is configured to be raised and lowered along its axial direction. Therefore, it can be done freely.

However, on the bottom surface of the lever-like hull body 30, there are provided a water or other liquid supply pipe 48, a lining material supply pipe 4 for supplying the lining material in a dry manner using compressed air, etc.
7 are connected by joint members 46 and 45, respectively.
However, the pipes 47 and 48 are introduced from an opening 60a formed in the side of the flue 60. However, such a hull body 30 is precisely connected to the cylindrical structure 6 by a plurality of retractable sliding rods 32 disposed equiangularly on the lower circumferential side thereof.
It is set at the center position of 0, and the sliding rod 3 is
At the tip of the contact member 39, a trochanter is provided as necessary to facilitate contact movement.
That is, the specific relationship is as shown separately in FIGS. 2 and 3, and in this embodiment, three supports are provided at the bottom of the aircraft hull member 30 at a distance of 120 mm. Tubes 31 are arranged in the radial direction, and each of these support tubes 31 is provided with a mounting seat 43 for mounting the sliding rod 32 therein and attaching the joint body 39 layered to the tip of the sliding rod 32. ,
Moreover, an engaging portion 33 is formed at the base end of the sliding rod 32,
The engaging portion 33 is engaged with a spiral cam portion 35 as shown in FIG. 3 of a rotating plate 34 that is rotatably provided with respect to the aircraft hull body 30, and the rotating plate 34 is formed with a concentric gear 36, and a separate hull body 3 is formed with respect to this gear 36.
The gear 37 of a motor 38 provided in the holder 40 is engaged with the gear 37 of the motor 38, and the motor 38 is driven to rotate the holder 40 to the center of the hull body 30 via a bearing 41. The rotating plate 34 is configured to rotate as appropriate. Note that an expandable cover cylinder body 42 is provided between the machine body body 30 of the sliding rod 32 and the intermediate joint 43, and is engaged in a telescopic manner to expand and contract, and is designed to cover and protect this part. It has become. Also, the aircraft hull body 3 as described above
A lining material supply pipe 27 connected to the above-mentioned supply pipe 47 is provided in the center of the 0, and this supply pipe 27
A proximal end of a discharge port body 20 is provided opposite to the distal end of the cylindrical structure 60, and the distal end of the discharge port body 20 is bent as shown in FIG. The discharge port body 20 is oriented toward the inner surface, and is separately attached to the upper end of a rotary cylinder 25 rotatably provided via bearings 22, 21 with respect to the rising portion 30a of the machine hull body 30. A water seal mechanism 24 is formed between the upper end of the rotary cylinder 25, the upper end of the supply pipe 27, and the lower end of the discharge port body 20 using another bearing 19 or the like. However, a liquid supply pipe 48 as described above is connected to this water seal mechanism section 24.
Water is added to the material sent from the water seal mechanism section 24 into the supply pipe 27 through the nozzle section 23.

Further, the gear 26 provided on the outer periphery of the lower end of the rotary cylinder 25 is engaged with a motor gear 28 of a driving mechanism 29 separately installed in the hull body 30. The discharge port body 20 is rotated at a required speed via a rotary cylinder 25. Machinery body 30
Covers 15 and 16 are provided on the outside of the upper part as appropriate, and inside the cover 15 that covers the top part, a plurality of lining layer thickness detection rods 10 are arranged, similar to the above-mentioned sliding rod 32. These sensing rods 10 are connected to the elastic material 1 through the joints.
The proximal end is connected to the piston 14 of the cylinder 12 in which the structure 60 is housed, and the detection part 13 is attached to the tip thereof. The thickness of the lining layer is detected, and in response to the signal, the hull body 30 is moved upward via the suspension means 49 suspending the hull body 30 to the area where a new lining layer is to be formed. It is configured to cause discharge blowing from the discharge port body 20.

A specific example of the method of the present invention carried out using the above-mentioned apparatus will be described below.

Example 1 Outer diameter is 2,500111111 and inner diameter is 2,3407! IR
When constructing a chimney with a height of 120 m, after arranging reinforcement within its outer frame, about 2 m was installed at the bottom of the chimney to use as a foothold to stabilize the aircraft hull body 30. Thickness 8
071i11, spray lining is applied, and then the aircraft hull body 30 as described above is suspended by a lifting device hanging from the top of the chimney, each sliding rod 32 is extended, and the aircraft hull body 30 is
was set on the center line of the chimney, and the lining work was carried out while the aircraft hull body 30 was raised via the lifting device.

An acid-resistant lining material is used as the lining material, and 7s of compressed air of 10Nm8/11tπ is fed, and 5e/1! u′! L of water was added and sprayed horizontally through the discharge port body 20 at a discharge rate of 50Kη to n to form the structure 60.

When the hull body 30 was always pulled up and located on the center line and the inner surface of the formed structure 60 was detected by the detection rod 10 and worked, it was found that the thickness was 8011i11 and the width was 1501mm! Ill finish, the thickness variation is less than ±5 mm, and there are almost no lining boundaries each time it rises, making it possible to form a stable lining, which is different from the conventional lining finish. When compared with the method, the number of man-hours was reduced by about 30 fl.
According to the present invention as explained above, cylindrical structures such as chimneys, which conventionally required considerable man-hours, time, and costs, can be easily and efficiently constructed, and workers can easily and efficiently construct them in high places. It is possible to work under conditions where there is no danger of falling accidents or other dangers involving work equipment, etc., and in particular, it is possible to work outside the cylindrical structure to be constructed, so it is free from the conditions where dust is generated due to the spraying method. Construction can be carried out in a completely protected and comfortable environment, and the work will not be interrupted or interrupted by the generated dust, and the state of the lining layer can be constantly detected by the detection means. The layer thickness of the resulting cylindrical structure is always uniform because the work is carried out while the work is being carried out, and as a result, it is possible to carry out highly efficient and accurate construction smoothly and safely, which is why it is an industrial field. This is a highly effective invention.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is an explanatory diagram showing the general state of construction according to the present invention, FIG. 2 is a partially cutaway side view of the hull, and FIG. FIG. 3 is a cross-sectional plan view of the rotating plate portion.

Claims (1)

[Claims] 1 After assembling appropriate reinforcing materials in the outer formwork or outer skin, set the hull on the center line of the cylindrical structure to be constructed, and apply the necessary lining materials, water, etc. to the hull. The liquids are fed separately, water and other liquids are added to the lining material, and then the liquid is supplied to the discharge port body whose upper end side is bent toward the inner surface of the structure. The inner lining of a cylindrical structure is characterized in that the inner lining of a cylindrical structure is carried out by rotating the lining and moving the machine body along the center line while detecting the state of the formed lining layer with a detection means. Construction method.