JPH0443546Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an in-tower working unit used for cleaning and inspecting the inside of a tower having an opening at the top.

[Conventional technology] Conventionally, when cleaning and inspecting the inside of closed towers and tanks such as sludge melting furnaces, garbage incinerators, and steel melting furnaces,
First, the inside of the reactor was cooled down, and then workers entered the reactor and erected scaffolding.

[Problems that the invention aims to solve] However, in the case of such conventional work methods, it is difficult to efficiently cool the inside of the furnace, and it takes a long time to cool down the inside of the furnace. For the workers, the work was done in a bad environment with residual dust and gas. Moreover, the work of assembling the scaffolding along the furnace wall inside the furnace is extremely troublesome, resulting in a problem that the overall working time is lengthened.

This invention solves such problems.

[Means for solving the problem] The in-tower work unit of this invention is used for cleaning and inspecting the inside of a tower that has an opening at the top, and is suitable for use with cranes. The cylindrical unit body is suspended and inserted into the tower from the upper opening of the tower, and has a hollow interior through which workers can enter and exit, and a unit provided between the tower and the unit body and controlled from outside the tower. a lifting device for raising and lowering the unit body within the tower; an auxiliary means provided inside the unit body to assist workers in climbing up and down the hollow interior of the unit body; , an injection nozzle that is rotatable about an axis in the vertical direction; a rotation device that is controlled from outside the tower to rotate the injection nozzle; or a supply device for supplying gas; an angle adjustment device that is installed on the injection nozzle and is controlled from outside the tower to adjust the injection angle of the injection nozzle; It is characterized by consisting of a scaffolding beam that can be assembled.

[Function] The in-tower work unit of this invention enables unattended cleaning of the inside of the tower in adverse environments by rotating, raising and lowering, and adjusting the angle of the injection nozzle inside the tower by remote control from outside the tower. By making it possible to construct work scaffolds using scaffolding beams attached to the unit main body, we aim to reduce the work burden and shorten the work time. By cooling, the working time can be further shortened.

[Example] Hereinafter, an example of this invention will be described based on the drawings.

In the figure, 1 is a cylindrical unit body;
The hollow interior is large enough for workers to fit inside. The outer diameter of this unit body 1 is set smaller than the inner diameter of the upper opening of the furnace body 2 to be cleaned and inspected, and is designed to be suspended from a crane's suspension wire 3 and inserted into the furnace. There is. Further, the unit main body 1 is constructed so that the overall length can be adjusted by adding cylindrical bodies of predetermined dimensions. Further, a plurality of cylinder connecting portions 4 are provided on the outer circumferential portion of the unit body 1, shifted in the vertical direction, and these connecting portions 4 and the furnace body 2
A total of four lifting cylinders 5 are installed between the opening side of the
a, 5b, 5c, and 5d can be attached. Four lifting cylinders 5a, 5b, 5
c and 5d are installed at equal intervals along the circumferential direction of the unit main body 1, as shown in FIG. 3, and are controlled by a control device 6 outside the furnace, as will be described later. Ru. Further, when the unit main body 1 is inserted into the furnace, a guide roller 7 is provided at the opening of the furnace body 2.

A ramp (auxiliary means) 8 is provided on the inner periphery of the unit body 1 to assist the worker in climbing up and down the unit, and an entrance 1a for the worker is provided on the lower peripheral wall of the unit body 1. It's dawning.

Further, an injection device support column 9 extending downward is connected to the lower end of the unit main body 1, and the support column 9 is equipped with an injection nozzle 10 that pivots about an axis in the vertical direction. That is, this injection nozzle 10 is tiltably attached to the lower side of an arm 12 by a pin 11, and this arm 12 is further attached to the lower side of a swing ring 13, and the swing ring 13 is attached to the support column 9 side. It is rotatably supported between a plurality of upper and lower support rollers 14a and 14b. The turning ring 13 is a ring-shaped body with a trapezoidal cross section, and the upper and lower support rollers 14a and 14b are also trapezoidal in accordance with the shape.
By sandwiching the swing ring 13 from above and below, the swing ring 13 is supported in a fixed position so as to be freely swingable.
Note that a weight 15 is attached to the base end of the injection nozzle 10.

A gear 16 is formed on the outer periphery of the swing ring 13, and a motor 17 (swing device) is connected to the gear 16.
pinion 18 is in mesh. The motor 17 is mounted on the support column 9 and is adapted to be controlled by a control device 6 outside the furnace. Also,
An air cylinder (angle adjustment device) 19 is installed between the turning ring 13 and the injection nozzle 10, and is controlled by a control device 6 outside the furnace. A supply device 20 for supplying liquid or gas for injection is connected to the injection nozzle 10, and the injection nozzle 10 is configured to eject the supplied liquid or gas from the tip of the nozzle. Further, the supply device 20 is installed outside the furnace and is controlled outside the furnace.

The base ends of a plurality of scaffolding beams 21 are attached to the lower outer periphery of the unit body 1 by pins 22 so as to be rotatable in the vertical direction. One end of a chain 23 is connected to the tip of the scaffolding beam 21, and the other end of the chain 23 is connected to the first chain connecting portion P1 on the upper side of the unit main body 1 or the second chain connecting portion P1 on the lower side.
They are selectively connected at a connecting portion P2. When the chain 23 is connected to the former first connection part P1, the scaffolding beam 21 is connected to the first connection part P1.
As shown by the solid line in the figure, the scaffolding beam 2 is opened outward and held horizontally, while the chain 23 is connected to the latter second chain connection part P2.
1 is held in a vertical position constricting inward, as indicated by the two-dot chain line in FIG. Reference numeral 24 in FIG. 2 is a scaffolding board, which is placed on top of the scaffolding beam 22 when it is in a horizontal state.

Next, the effect will be explained.

First, the unit body 1 is suspended by the suspension wire 3 of a crane, and the unit body 1 is positioned above the opening of the furnace body 2. At that time, the air cylinder 19 is expanded in advance to make the injection nozzle 10 itself approximately vertical, with the nozzle tip facing downward, and the chain 23
The other end is connected to the lower connecting part P2, and the scaffolding beam 21 is narrowed in a vertical state.

In this manner, the unit body 1 is gradually lowered into the furnace while the injection nozzle 10 and the scaffolding beam 21 are kept in a configuration along the unit body 1. When descending, a guide roller 7 is attached in advance and the guide roller is used. After lowering the unit body 1 to some extent, the lifting cylinders 5a, 5b,
5c and 5d are connected to the unit main body 1. One set of cylinders 5a, 5c facing each other and another set of cylinders 5b, 5d facing each other are connected to connecting parts 4 having different heights, and from now on, these two
The unit body 1 is raised and lowered in the furnace by the expansion and contraction of the set of cylinders. If one set of cylinders shrinks completely while the unit body 1 is being lowered, move the connecting portion 4 of one set of cylinders to a higher position while supporting the unit body 1 with the other set of cylinders. . When the length of the unit main body 1 is insufficient, the next unit main body 1 is connected to the upper end. In addition, if one set of cylinders is fully extended while the unit main body 1 is rising, move the connecting part 4 of one set of cylinders to a lower position while the unit main body 1 is supported by the other set of cylinders. change.
The unit main body 1 is raised and lowered within the furnace by alternately operating the two sets of cylinders by a control device 6 outside the furnace.

When the unit main body 1 is moved up and down, the air cylinder 19 is controlled by the control device 6 outside the furnace, so that the injection nozzle 1 is directed perpendicularly to the wall surface inside the furnace as shown in FIG. and injection nozzle 1
While rotating the nozzle, water or air is injected from the nozzle tip. The rotation of the injection nozzle 10 is
This is done by operating the motor 17 by the control device 6, and the water or air to be injected is supplied from the supply device 20 outside the furnace. Also, injection nozzle 1
The injection angle of 0 can be adjusted as appropriate by controlling the air cylinder 19.

In this way, by remote control from outside the furnace, the unit main body 1 can be raised and lowered, and the injection nozzle 1 can be moved up and down.
While rotating the nozzle, water or air is injected from the nozzle tip. This forcibly cools the inside of the furnace and cleans the inside of the furnace to remove flying dust and gas.

After thoroughly cleaning the inside of the furnace, a gas detector is inserted into the unit body 1 to measure the gas concentration inside the furnace, and after confirming safety, the worker enters the inside of the unit body 1 and presses the ramp 8. Descend accordingly. The worker who has descended to the lower end of the unit body 1 changes the connection point of the other end of the chain 23 from the lower connection part P2 to the upper connection part P1. As a result, the scaffolding beam 21 is as shown by the solid line in Figure 1.
Open 90° and become horizontal. After that, unit body 1
A scaffolding board 24 is brought in from outside the furnace through the inside, and the scaffolding board 24 is set on the scaffolding beam 21. Then, the worker performs inspection work inside the furnace on the scaffold board 24.

After the inspection work is completed, the unit main body 1 is pulled out of the furnace by the reverse operation to that described above, and the series of work is completed.

[Effects of the invention] The in-tower working unit of this invention has the following effects due to the above-mentioned configuration and operation.

Since the injection nozzle can be rotated up and down and its angle adjusted by remote control from outside the tower, the inside of the tower can be cleaned unattended in adverse environments.

A scaffold for work inside a tower can be easily made based on the scaffolding beam attached to the unit main body, and the work burden is reduced.

There is no need to build a scaffolding frame inside the tower, which reduces work time.

Even immediately after the operation is stopped, the inside of the tower can be forcibly cooled, making it possible to further shorten the working time.

[Brief explanation of the drawing]

Fig. 1 is an overall schematic diagram of an embodiment of this invention, Fig. 2 is an enlarged view of the lower part of the unit main body in the same embodiment, and Fig. 3 is an enlarged sectional view taken along the - line in Fig. 1. It is. 1... Unit body, 2... Furnace body, 3... Hanging wire, 5a, 5b, 5c, 5d... Lifting cylinder, 6... Control device, 8... Tarap (auxiliary means), 10... Injection Nozzle, 17...Motor (swivel device).

Claims (1)

[Scope of claim for utility model registration] An in-tower work unit used for cleaning and inspecting the inside of a tower having an opening at the top, which is suspended by a crane from the upper opening of the tower. A cylindrical unit body that is inserted into the tower and has a hollow interior that allows workers to enter and exit, and is provided between the tower and the unit body and is controlled from outside the tower to raise the unit body within the tower. an elevating device for lowering the unit; an auxiliary means provided inside the unit body to assist the worker in climbing up and down the hollow interior of the unit body; a rotating device that is controlled from outside the tower to rotate the injection nozzle; a supply device connected to the injection nozzle and controlled from outside the tower that supplies liquid or gas for injection; It is characterized by consisting of an angle adjustment device that is equipped and controlled from outside the tower to adjust the injection angle of the injection nozzle, and a scaffolding beam that is installed at the lower end of the unit body and assembled horizontally inside the tower. A unit for working inside the tower.