JPH0450956Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is used to clean the inner surface of piping used as hydraulic piping, boiler piping, cooling piping, etc. when the piping is assembled into various equipment and used. This invention relates to a pipe cleaning device.

[Prior Art] Conventionally, when cleaning piping as described above, after installing the processed piping, the piping is dismantled and carried outside the premises for cleaning, and then washed, degreased, washed with water, etc. outside the premises.
So-called off-line processing, in which treatments such as pickling, washing with water, and neutralization to prevent corrosion are performed in a liquid tank, has been carried out, and the process of transporting the cleaned piping to the site and installing it has been adopted.

However, in the so-called off-line pipe cleaning method as described above, there is a problem in that the time and cost required for cleaning are large.

In consideration of this point, so-called off-line processing has been proposed, in which processed pipes are installed on-site and then cleaned on-site while still assembled without dismantling them.

In the case of the above-mentioned offline processing, the process of dismantling the pipes after installation, the process of transporting them to the site after cleaning and installing the pipes, etc. can be omitted, so it is possible to shorten the construction period and reduce costs, and also to install the pipes after cleaning. Since there is no need for cleaning, there is less ingress of contaminants, and there is an advantage that piping can be cleaned effectively by circulating the treatment liquid.

[Problems that the invention aims to solve] However, in the case of the above-mentioned method of cleaning the piping assembled on site in its original position, unlike liquid tank treatment such as the offline treatment method, it is necessary to flow the treatment liquid into the piping. Since this method cleans the inner surface of the piping, it is difficult to determine whether the oxide scale that has adhered to the inner surface of the pipe or the paint on the outer surface of the pipe that has penetrated the inner surface has been completely removed. Even if the cleaning is carried out at a set time, insufficient cleaning or over-cleaning may occur.

Therefore, the present invention aims to provide a pipe cleaning device that can perform efficient and effective cleaning by making it possible to determine the cleaning status of the inner surface of the pipe from the outside when cleaning the pipe while it is still assembled. .

[Means for Solving the Problems] In order to achieve the above-mentioned purpose, the present invention provides a pipe on the processing liquid supply side that can be joined to one end of the pipe assembled on site, and a pipe on the other end of the pipe. It has a pipe on the processing liquid discharge side that can be connected to the pipe, and in the middle of one of the pipes, a residual material chip cut out during the processing of the pipe is inserted as a sample, and the internal residual material chip is removed from the outside. A transparent container that is transparent for visual inspection is interposed to communicate the inside of the pipe with the inside of the transparent container, and the remaining chips in the transparent container are washed with a cleaning liquid that is flowed into the pipe to clean the pipe. The configuration is as follows.

[Operation] When the supply side pipe and the discharge side pipe are joined to both ends of the assembled pipe to be cleaned, and the processing liquid is flowed into the pipe through the supply side pipe, the inner surface of the pipe is cleaned. There is a transparent container in the middle of the discharge pipe that allows the inside to be seen from the outside, and by inserting a pipe residue chip into this transparent container as a sample, the sample is treated with the processing liquid. By viewing the situation from the outside, it is possible to determine the cleaning status of the inner surface of the pipe.

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

Figures 1 to 3 show an embodiment of the present invention, in which a plurality of supply side branch pipes are connected by a flange 2 to one end of a plurality of pipes 1 assembled on site. 3 is connected to one supply pipe 5 via a header 4, and a valve 6 is installed in the middle of each supply side branch pipe 3, so that the processing liquid 8 in the processing liquid tank 7 is pumped into the supply pipe 5 by a pump 9. and is led to the supply side branch pipe 3 via the header 4 and valve 6. On the other hand, a plurality of discharge side branch pipes 10, which are joined to the other ends of the plurality of pipes 1 as assembled above with flanges 2, are connected to one discharge pipe 12 via a header 11, The discharge pipe 12
are connected to the processing liquid tank 7 to circulate the processing liquid, and in the middle of each discharge side branch pipe 10, the main body is covered with a tempered glass 14, as shown in detail in FIGS. 2 and 3. A transparent container 13, in which a chip 16 left over from processing the pipe 1 to be cleaned is inserted as a sample, and sealed with an O-ring 15 to prevent the processing liquid from leaking, is placed in a transparent container 13 whose axis is in the direction of the branch pipe 10. They are interposed perpendicularly to the axial direction so that the processing liquid 8 that has passed through the assembled piping 1 flows through the transparent container 13, and a flow meter 17 and a valve 18 are respectively provided to connect the supply side branch pipes. 3 valve 6 and the valve 18 of the discharge side pipe 10
The flow velocity in the pipe 1 can be set by observing the flow velocity with a flow meter 17 while adjusting the opening degree of the pipe 1.

The pipe 1 that has now been processed and installed on site,
If the assembly is to be cleaned on site, the supply side branch pipe 3 and the discharge side branch pipe 10 are connected to both ends of the pipe 1 with flanges 2, respectively, in the installed state. At this time, a residual chip 16 cut out during processing of the piping 1 to be cleaned is inserted as a sample into the transparent container 13.

When cleaning the piping 1, chemical cleaning is sequentially performed for each process such as degreasing, pickling, neutralization and rust prevention, etc., but the treatment liquid 8 necessary for cleaning in each of these treatment processes is stored in the treatment liquid tank 7.
The processing liquid is pumped from inside by a pump 9 and flows into the pipe 1 through the header 4 and the supply side branch pipe 3, and cleaning is performed by the flow rate of the processing liquid flowing inside the pipe 1 and the impact of the processing liquid hitting the inner surface of the pipe. , removal of oxidized scale and red rust adhering to the inner surface of the pipe 1, and removal of parts of paint applied to the outer surface of the pipe that have entered the inner surface of the pipe, etc. are performed. The removal of oxidized scale and red rust on the inner surface of the pipe 1, or the removal of paint that has penetrated and adhered to the inner surface, is performed by simultaneously cleaning the remaining chips 16 of the pipe inserted into the transparent container 13 with the treatment liquid. So, that chip is 16
The cleaning status of the transparent container 13 can be easily determined by visually checking it from outside the transparent container 13. As a result, it is possible to accurately grasp the cleaning processing time of the piping and the inner surface treatment state in each treatment process, and it is possible to prevent poor cleaning and over-cleaning.

In the above, when attempting to completely remove the processing liquid used from remaining in the pipe 1,
Volatile, high specific gravity with no flash point (specific gravity 1.5)
By cleaning with a fluorocarbon solvent, it is possible to completely remove residual processing liquid from complicated piping.

Note that the transparent container 13 may be provided in the middle of the supply side branch pipe 3.

[Effects of the invention] As described above, according to the pipe cleaning device of the present invention, the inner surface of the processed and assembled pipes can be cleaned.
In so-called on-line processing, which performs chemical cleaning treatments such as degreasing, pickling, and neutralization to prevent rust, processing liquid supply side pipes and discharge side pipes that can be joined to any assembled piping are: A transparent container is interposed in the middle of one of the pipes to contain the remaining chips cut out during the processing of the piping as a sample, and is transparent so that the remaining chips inside can be visually observed from the outside. The interior of the container is communicated with the inside of the container, and the remaining chips inside the transparent container are washed with the cleaning liquid that is flowed into the pipe to clean the pipe, so it can be used for degreasing, pickling, neutralization and rust prevention. It is possible to constantly check the processing status of the inner surface of the piping for each processing process by visually observing the processing status of the sample inside the transparent container from the outside of the transparent container, and to accurately understand the inner processing status of the piping. This makes it possible to prevent over-processing, poor cleaning, etc. that occur when cleaning is performed by setting a conventional time, making it possible to take full advantage of the advantages of online pipe cleaning. can be visually checked from the outside of the transparent container at all times, so there is no need to take the sample outside the tube to check the processing status, and the size of the transparent container can be adjusted to either the processing liquid supply side or the discharge side. By making the diameter larger than the diameter of the pipe, it becomes possible to use a sample that corresponds to the pipe, resulting in excellent effects such as enabling more accurate observation.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of the present invention;
The figure is a front view of the transparent container in the cleaning device of the present invention, and FIG. 3 is a side view of FIG. 2. DESCRIPTION OF SYMBOLS 1... Piping, 2... Flange, 3... Supply side branch pipe, 8... Processing liquid, 10... Discharge side branch pipe, 13...
...Transparent container, 16...Remaining chips.

Claims (1)

[Scope of utility model registration request] A processing liquid supply side pipe that can be connected to one end of the processed and assembled piping, and a processing liquid discharge side pipe that can be connected to the other end of the piping, and the processing liquid supply side Alternatively, a transparent container is interposed in the middle of one of the pipes on the discharge side, in which the remaining chips cut out during the processing of the piping are placed as samples, and the remaining chips inside are transparent so that the remaining chips inside can be visually observed from the outside. The inside of the pipe and the inside of the transparent container are communicated with each other, and the remaining chips inside the transparent container are simultaneously washed with a cleaning liquid that is flowed into the pipe to clean the pipe. cleaning equipment.