JPH0450957Y2 - - 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.

[Conventional technology]

Conventionally, when cleaning piping as described above, after installing the processed piping, the piping is dismantled from the site for cleaning, carried outside the premises, and washed - degreased - washed with water - pickled - washed with water - outside the premises. So-called off-line processing, in which neutralization, rust prevention, and other treatments are carried out in a liquid tank, involves transporting cleaned piping to the site and installing it.

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 online processing has been proposed, in which processed pipes are installed on-site and then the assembled pipes are cleaned on-site without disassembly.

When using the above online process, 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. There are advantages such as less intrusion of contaminants since there is no need to clean the pipes, and piping can be cleaned effectively by circulating the treatment liquid.

[Problem that the invention attempts to solve]

However, in the case of the above-mentioned method of cleaning piping assembled on-site in its original position, unlike liquid tank treatment such as off-line treatment, the inner surface of the piping is cleaned by flowing treatment liquid into the piping. Because of this, some parts have complicated bends, etc., making it difficult for the processing liquid to circulate sufficiently in some places. There are problems such as the need for a pump.

Therefore, the present invention makes it possible to easily clean areas where it is difficult for the treatment liquid to reach when cleaning the assembled continuous piping on-site, and also to easily shorten the cleaning processing time. It is an object of the present invention to provide a pipe cleaning device that can prevent over-treatment and poor treatment by making it possible to easily grasp the treatment status of the inner surface from the outside.

[Means for solving problems]

In order to achieve the above-mentioned purpose, the present invention consists of a processing liquid supply pipe that can be connected to one end of the piping assembled on site, and a processing liquid discharge pipe that can be connected to the other end of the piping. A pulsation generator is installed in the middle of one of the pipes to give pulsation to the processing liquid, and the remaining chips cut out during the processing of the pipe are put in as samples for processing. The remaining chips are treated with the liquid, and a transparent container is interposed so that the remaining chips inside can be visually observed from the outside.

[Effect]

By applying pulsation to the processing liquid flowing into the assembled piping, the processing liquid can be circulated more easily to areas that are difficult to reach, promoting the treatment of these areas and improving the cleaning effect as a whole. , the cleaning processing time can be shortened.

In addition, the processing status of the inner surface of the pipe at this time can be easily grasped by viewing the processing status of the sample inside the transparent container from the outside, and in particular, even when processing is accelerated by pulsation of the processing liquid, overtreatment may occur. This can be prevented.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figures 1 and 2 show an embodiment of the present invention, in which a plurality of supply side branches are connected by flanges 2 to one end of each of a plurality of pipes 1 assembled on site. Connect pipe 3 to 1 via header 4
A plurality of discharge side branch pipes 6 connected to the main supply pipe 5 and connected to the other end of each of the pipes 1 at flanges 2 are connected to one discharge pipe 8 via a header 7. Then, each end of the supply pipe 5 and the discharge pipe 8 is immersed in the processing liquid 10 in the processing liquid tank 9, so that the processing liquid 10 is circulated through the pipe 1. In the middle of the supply side branch pipe 3, there is a valve 1.
1 is installed, and pump 1 is installed in the middle of the supply pipe 5.
2, and the pump 12 supplies the processing liquid 10 to the supply pipe 5, the header 4, the supply side branch pipe 3, and the valve 1.
1 and into the pipe 1. On the other hand, in the middle of the discharge side branch pipe 6, the main body is covered with tempered glass, a chip left over from processing the pipe 1 to be cleaned is inserted as a sample, and the transparent pipe is sealed with an O-ring. Container 13
, install the flow meter 14, and the valve 15, respectively,
The opening degrees of the valve 11 of the supply side branch pipe 3 and the valve 15 of the discharge side branch pipe 6 are adjusted so that the flow rate in the pipe 1 can be set while checking the flow rate with the flow meter 14.

Further, on the discharge side of the pump 12 of the supply pipe 5, an accumulator 16 is provided as a pulsation generating device which is a feature of the present invention. Accumulator 16
As shown in FIG. 2, it consists of a gas chamber 18 formed in a rubber bag 17 and a liquid chamber 19 outside the gas chamber 18,
A pressure air pipe 21 that can be switched by a solenoid valve 20 is connected to the gas chamber 18, and
The liquid chamber 19 is communicated with the supply pipe 5, and the volume of the liquid chamber 19 is changed by turning on and off the air pressure to the gas chamber 18 using a solenoid valve 20, thereby giving pulsation to the processing liquid 10.

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 branch pipe 6 are connected to both ends of the pipe 1 with flanges 2, respectively, in the installed state. At this time, a remaining chip cut out during processing of the piping 2 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 anti-corrosion, but the treatment liquid 10 necessary for cleaning in each of these treatment processes is supplied from the treatment liquid tank 9. A part of the liquid is pumped by the pump 12, stored in the liquid chamber 19 of the accumulator 16, and the rest is flowed into the pipe 1 via the header 4, the supply branch pipe 3, and the valve 11. Processing liquid 10 flowing inside pipe 1
Cleaning is performed by the flow rate and the impact of the processing liquid 10 hitting the inner surface of the pipe 1. If the piping 1 is long and continuous, there will be parts where the processing liquid 10 is difficult to circulate, but the volume of the liquid chamber 19 of the accumulator 16 is
By changing the supply of pressurized air in the gas chamber 18 by turning on and off with the solenoid valve 20, the processing liquid can be made to pulsate, so the pulsation allows the processing liquid to reach areas where it would otherwise be difficult for the processing liquid to reach. The cleaning process can be further accelerated as the water can be rotated more efficiently. Thereby, the cleaning effect of the entire piping 1 can be enhanced, and the time required for cleaning the entire piping can be shortened.

The cleaning status of the piping 1 is that the remaining chips of the piping inserted into the transparent container 13 interposed in the middle of each discharge side branch pipe 6 are being simultaneously treated with the treatment liquid, so the cleaning status of the remaining chips is as follows. A transparent container 1
3 can be easily and accurately grasped by visually checking from the outside, and it is possible to prevent processing defects and over-processing in each processing step.

Next, FIG. 3 shows another embodiment of the present invention, in which an electric valve 22 is used instead of the accumulator 16 as a pulsation generating device that gives pulsations to the processing liquid 10.
installed on the discharge side of the pump 12 in the supply pipe 5,
The electric valve 22 is opened and closed by a motor 23 to generate pulsations in the processing liquid 10. The rest of the structure is the same as that in FIG. 1, and the same parts are given the same reference numerals.

In this embodiment as well, the processing liquid 10 supplied into the piping 1 from the supply pipe 5 is pulsated by increasing or restricting the flow rate by opening and closing the electric valve 22. This can be further promoted.

In addition, in each of the above embodiments, the accumulator 1
6. Although the case is shown in which the electric valve 22 is provided in the middle of the supply pipe 5, it may be provided in the middle of the discharge pipe 8 to cause the processing liquid to pulsate inside the pipe 1.

[Effect of idea]

As described above, according to the piping cleaning device of the present invention, the inner surface of the processed and assembled piping can be cleaned.
In so-called on-line processing, which involves chemical cleaning treatments such as degreasing, pickling, and neutralization to prevent rust, the pipes on the processing liquid supply side and the processing liquid discharge side can be connected in series to the assembled piping. A pulsation generator is installed in the middle of one of the pipes to give pulsation to the processing liquid flowing into the pipe, and
The remaining chips cut out during the processing of the piping are placed as samples, and the remaining chips are treated with the processing liquid, and a transparent container is interposed so that the remaining chips inside can be visually observed from the outside. Because of the structure, the pulsation allows the processing liquid to circulate better even in parts of the assembled piping where it is particularly difficult for the processing liquid to circulate, further promoting the cleaning of these parts and improving the overall processing effect. The cleaning process time can be shortened without using a conventional large-capacity pump, and the inside of the pipe is cleaned using a transparent container that is simultaneously cleaned with the processing liquid used to treat the inside of the pipe. The cleaning process status of the remaining chips as samples inside the pipe can be visually checked from outside the transparent container, so the cleaning process can be checked from the outside without having to take each sample out of the pipe and check it. By visually checking the processing status of the remaining chips in the transparent container, it is possible to immediately and accurately grasp the processing status of the piping, and it is possible to prevent processing defects and overprocessing in each processing process. The pulsation of the liquid accelerates the processing inside the pipes, resulting in efficient cleaning. By looking at the processing status of the remaining chips in the transparent container, you can accurately understand the processing status of the pipes and prevent over-processing. It can produce excellent effects.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing one embodiment of the present invention;
The figure is an enlarged view of the accumulator section in Figure 1.
FIG. 3 is a schematic diagram showing another embodiment of the present invention. 1... Piping, 2... Flange, 5... Supply pipe,
8...Discharge pipe, 9...Processing liquid tank, 10...Processing liquid, 12...Pump, 13...Transparent container, 16...
...Accumulator, 18...Gas chamber, 19...Liquid chamber, 22...Electric valve.

Claims (1)

[Scope of utility model registration request] It has 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 either one of the above A pulsation generating device is installed in the middle of the pipe to give pulsations to the processing liquid, and the remaining chips cut out during the processing of the pipe are put in as samples so that the processing liquid can treat the remaining chips. A pipe cleaning device characterized in that a transparent container is interposed so that residual chips inside can be visually observed from the outside.