JPH0417777A - Runner inspection scaffolding for hydraulic machinery - Google Patents

Abstract

PURPOSE:To enable a worker to perform a job through a manhole opening without going out to a main beam within a draft tube liner by providing an inspection scaffolding material IN/OUT means for taking out an inspection scaffolding material from storage space for laying on the main beam at the time of inspection, and storing the material in the storage space after the inspection. CONSTITUTION:In inspecting a runner 9, an inspection manhole 2 continuous to the observation passage 8 of a draft tube liner 1 is opened, and a main beam 5 is inserted through a runner inspection scaffolding main beam insertion seat 3 located at the lower part of the manhole 2. Then, the main beam 5 is extended and fixed to a main beam seat 4 on the inner surface of the draft tube liner 1 opposite to the side of the manhole 2. Thereafter, a drawing tool as an inspection scaffolding material IN/ OUT means is used for fitting the main beam 5 through the side of the manhole 2 to the end of an inspection scaffolding material 6 projected from the drawing-out outlet of inspection scaffolding material storage space 7 adjacently open to the upper end of the main beam seat 4. According to the aforesaid construction, the single continuous inspection scaffolding material 6 stored in the inspection scaffolding storage space 7 can be drawn out as it is, extended to the side of the manhole 2 and laid on the main beam 5. Finally, the anchor of material 6 is fastened.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) The present invention is directed to a hydraulic system used when inspecting the runners of hydraulic machines such as water turbines and pump turbines, or when disassembling or assembling hydraulic machines. Concerning machine runner inspection scaffolding.

(Prior art) Generally, in hydraulic machines such as water turbines and pump water turbines,
An inspection tool called a runner inspection scaffold is installed in communication with the inspection manhole that opens into the inspection path for the suction pipe liner to inspect the area around the runner when the hydraulic machine is stopped, or as a scaffolding material when disassembling or reassembling the hydraulic machine. . FIGS. 4 and 5 are longitudinal and cross-sectional views showing such conventional runner inspection scaffolding for hydraulic machines. In the figure, when inspecting the runner 9, open the inspection manhole 2 that opens into the inspection path 8 of the suction pipe runner 1, and insert the main beam 5 from the main beam insertion seat 3 of the runner inspection scaffold located at the bottom of this manhole 2. By this, the main beam 5 is passed and fixed so as to reach the main beam seat 4 on the inner surface of the suction pipe liner 1 facing the manhole 2 side. Then, one of the inspection scaffolding materials 6 made of a flat plate divided on the main beam 5 is carried into the suction pipe liner 1 through the opening of the manhole 2, and installed from the manhole 2 side so as to intersect with the main beam 5. is fixed. Thereafter, one of the next inspection scaffolding materials 6 is similarly carried in through the opening of the manhole 2 and identified. By repeating this process, the inspection scaffolding material was finally installed and fixed on the entire surface of the main beam 5.

(Problem to be solved by the invention) However, in such an inspection scaffold, the inspection scaffolding material 6 is
The installation is fixed for each sheet, and the input is carried in through the relatively narrow opening of the manhole 2, so other workers must be on top of the main beam 5 inside the suction pipe liner 1 beforehand, and the The inspection scaffolding material 6 that has been inspected must be removed and fixed in its proper position. Similarly, when the inspection scaffolding is disassembled or removed after the inspection is completed, it is necessary to have workers inside and outside the suction pipe liner 1.

For this reason, in particular, workers inside the suction pipe liner 1 must
This involves dangerous work at high places in unstable locations, and it is essential that workers not only check the safety of each other at a high level, but also that workers themselves take sufficient precautions. In addition, since the inspection scaffolding is assembled and disassembled manually by input, it takes a relatively long time in terms of work time and setup time. Therefore, the proportion of the total downtime of the hydraulic machine increases, which has a considerable effect on the efficient operation of the hydraulic machine.

In addition, as mentioned above, the inspection scaffolding materials 6 are divided into pieces after considering weight, size, etc., to the extent that they can be carried in according to the input, so not only the inspection scaffolding materials 6 but also each inspection scaffolding is separated. Supplies and working tools for installing and fixing the material 6 will also be brought into the suction pipe liner 1. In this case, care must always be taken to ensure that these instruments and inspection scaffolding materials do not fall into the suction pipe liner.

The present invention has been made in consideration of the above circumstances, and enables safe assembly and disassembly of runner inspection scaffolding.

Furthermore, the purpose is to provide something that can be implemented reliably in a short period of time.

[Configuration of the Invention (Means for Solving the Problems)] In order to achieve the above object, the runner inspection scaffold for hydraulic machinery in the present invention includes an inspection manhole provided to open into the suction pipe liner inspection path, and this An inspection scaffold main beam insertion seat is provided on the suction pipe liner at the bottom of the manhole, and a main beam support is provided on the inner surface of the suction pipe liner facing the manhole side, and an inspection scaffold is installed on the back side of the suction pipe liner above the main beam support. The warehouse for inspecting scaffolding materials is equipped with an opening for pulling out inspection scaffolding materials at a position in contact with the upper end of the main beam seat on the inner surface of the suction pipe liner. The inspection scaffolding material is stored in a spiral shape as one continuous plate.
At the tip of the inspection scaffolding material, seats for pulling out and fixing the inspection scaffolding material are attached, for example, as inspection scaffolding material entry/exit means.

(Operation) As a result, the main beam is inserted from the main beam insertion seat for inspection scaffolding at the bottom of the manhole, passed to the main beam catch on the opposite side of the manhole and fixed, and then opened in contact with the upper end of the main beam catch. Pull out the inspection scaffolding material in the inspection scaffolding warehouse from the inspection scaffolding drawer opening, extend it over the main beam to the manhole side, and then fix it.

(Example) An example of a runner inspection scaffold for a hydraulic machine according to the present invention will be described below with reference to FIGS. 1, 2, and 3.

When inspecting the runner 9, open the inspection manhole 2 that opens into the inspection path 8 of the suction pipe liner 1, and
Insert the main beam 5 from the runner inspection scaffold main beam insertion seat 3 located at the bottom of the runner inspection scaffold. Then, it is passed to the main beam seat 4 on the inner surface of the suction pipe liner l facing the manhole 2 side and fixed. After that, from the manhole 2 side, use a pull-out tool as a means for taking in and out the inspection scaffolding material, and use the inspection scaffolding material 6 that has come out from the drawer opening of the inspection scaffolding material drawer store 7, which is in contact with the upper end of the main beam seat 4 and open. Attach to the tip of the As a result, one continuous piece of inspection scaffold material 6 stored in the inspection scaffold delivery warehouse 7 is directly extended onto the drawer main beam 5 to the manhole 2 side, and the fixing seat is fixed. Further, after the inspection is completed, the inspection scaffolding material 6 is unfixed, and the inspection scaffolding material 6 is returned to the inspection scaffolding delivery warehouse 7 and stored. Therefore, the operator must
Work can be carried out through the manhole opening in the inspection path 8 without having to go onto the main beam 5 inside the inspection path 8, and the runner inspection scaffold can be easily assembled, disassembled, or stored, allowing for safe and reliable construction in a short time. come. Here, the inspection scaffold material 6 may be rolled up and rolled up by a motor as the means for taking in and out the inspection scaffold material.

[Effects of the Invention] As described above, according to the present invention, the operator does not have to go directly onto the main beam inside the suction pipe liner.

Since work can be done from the manhole opening, safety during one work is effectively improved, and there is no need to worry about falling into the suction pipe liner. Furthermore, since the work itself is simplified, it is effective in shortening the work time and reducing the downtime of hydraulic machinery.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is an enlarged vertical sectional view of the area around the runner inspection scaffold according to the invention, and FIG. 3 is a cross-sectional plan view of the area around the runner inspection scaffold according to the invention. 4
The figure is a longitudinal cross-sectional view of the conventional example, and FIG. 5 is a cross-sectional plan view of the conventional example. 1... Suction pipe liner, 2... Manhole, 3...
Main beam insertion seat, 4... Main beam receiver, 5... Main beam, 6...
・Inspection scaffolding materials, 7.Inspection scaffolding delivery warehouse.

Claims (1)

[Claims] An inspection manhole provided in the suction pipe liner of the power machine, a delivery warehouse provided on the back side of the opposing surface of the inspection manhole and containing inspection scaffolding materials, and a storage area that is located between the lower part of the inspection manhole and the delivery warehouse during inspection. a main beam for inspection scaffolding that bridges the lower part of the inspection scaffold; and an inspection scaffolding material loading and unloading means for taking out the inspection scaffolding material from the delivery warehouse during the inspection and laying it on the main beam, and storing it in the delivery warehouse when the inspection is completed. A runner inspection scaffold for hydraulic machinery, characterized by comprising: