JPS62166297A - Propulsive cleaning device for inside of fluid tube - Google Patents

Abstract

PURPOSE:To clean strongly adhered scale easily by inserting a cleaning device which combines a cylindrical steel brush and a cylindrical plug made of foaming resin and propelling it through the inside of tube with pressure. CONSTITUTION:A steel brush 1 having an outer diameter of 13.4-14.0mm and a length of 5cm and a cylindrical plug 2 having about the same diameter as the brush 1 and made of semi-hard urethane foam as foaming resin were combined and they were used to clean 192 oil cooler tubes of 13.6mmX1,802mml. The brush 1 was tapered by making its outer diameter small at the tip to be able to insert easily into the tubes. From one end of the tube, the brush first, and the plug next, were inserted into the tube and toward their back compressed air having a pressure of 3-5kg/cm<2> was pushed in to propel them and complete cleaning is achieved by only one propulsion.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a fluid pipe propulsion cleaning tool that cleans various deposits firmly attached to the inner walls of pipes such as heat exchangers, such as scales, scales, etc.
This product relates to a container for removing and cleaning deposits and other foreign matter.

[Conventional technology]

Conventionally, the following tools have been used for cleaning the inner surfaces of heat exchanger tubes.

(1) An arrow with animal hair or plastic hair flocked around the shaft of the knife is exposed to a round steel light, and the inside of the pipe is manually moved back and forth several times to clean it. With one tool, the power to grind the scale inside the pipe is weak and the efficiency is poor.

(2) Round steel Easy to damage the inner wall of the pipe.

(3) Jet cleaning equipment Kono equipment uses high pressure water (50~100 kg/crrr
This is a device that cleans by using a jet nozzle that sprays water ('), and its cleaning effect is excellent, but equipment costs such as high-pressure pumps are expensive.

(4) Sand jet device This device cleans the pipe by sending a fluid mixture of nitrogen gas and abrasive into the pipe, and it has drawbacks such as (1) high cost.

In order to solve the above-mentioned problems, a shot cleaner was provided around 11 at a time, and the inside of the pipe is cleaned using this cleaning tool. The shot cleaner is a sponge-like shot that is propelled through the pipe by jetting fluid. This shot is, for example, bullet-shaped and has a highly elastic sponge body made of semi-hard urethane foam. The diameter of the shot is - Generally, pressing against the inner wall of the tube increases the force, so 'l? The tube should be 1 to 3 mm larger than the inner diameter, but various outer diameters should be selected and used depending on the scale of the tube inner diameter. The pressure of the pressure fluid at that time is 1 to 5 k
It is used at around g/cm m'.

[Problem that the invention seeks to solve]

This type of shot cleaner is capable of cleaning the inner walls of pipes in the conventional way.
Compared to J, it was an effective -r stage that was easy to operate, did not damage the inner wall of the pipe, and was inexpensive. However, the scale cap that has grown strongly and thickly is shot glue i.
On the other hand, the strength is a drawback, and when such scale is encountered, the shot deforms and propels the surface of the scale, failing to remove the scale. Therefore, complete cleaning not only requires repeated operations many times.

It is necessary to select various outside diameters of the shot, so try out shots with several different outside diameter dimensions! There are drawbacks, such as the need to clean ηi repeatedly, the operator's intuition being relied on, and repeated work required for complete cleaning, which takes a long time.

[Dingdan who solves problems]

In order to solve these problems, after various studies, we developed a cleaning tool that combines a cylindrical steel brush and a cylindrical stopper made of foam resin. Load this cleaning tool into the pipe,
By pushing this while pushing it inside the pipe, it is possible to easily clean the scale that has adhered to it, and what's more, cleaning the inside wall of the pipe, which previously required repeated cleaning and took a long time, can now be done once or twice. This makes it possible to clean completely.

[Effect]

By propelling a cylindrical steel brush and a cylindrical stopper made of foam resin through the pipe, the wire 5 of the cylindrical steel brush at the top removes the firmly attached scale while grinding, and removes it from the foam resin at the rear. The cylindrical stopper then polishes the inner surface of the tube to uniformly and completely restore the inner wall surface of the tube.

〔Example〕

A cylindrical steel brush l with an outer diameter of 13.4 to 14.0 mm and a length of 5 cm as shown in Fig. 1, and this cylindrical brush 1
and a cylindrical stopper 2 made of semi-rigid foamed urethane, which is a foamed resin having approximately the same outer diameter, to clean an oil cooler tube 13.6 mmφ x 1802 mm x 192 pieces of wood. The steel brush 1 was tapered so that the outer diameter of the brush on the front side was slightly thinner so that it could be easily inserted into the pipe.

First, the steel brush 1 is loaded into the cooler tube from one end, then the urethane cylindrical plug 2 is loaded, and then the urethane cylindrical plug 2 is loaded from the rear.
~5 kg/Cm' of compressed air 3 was fed to propel the cleaning tool of the present invention to the end of the cooler tube. Approximately one-third of the total number of tubes propelled the cleaning tools at the same time, and the required time was approximately 3 minutes per cycle. The cleaning result is inside the pipe 11
? Damage to q.

I was able to completely clean it in one push without any problems.

FIG. 4 shows an embodiment with a kite forest 4 inserted into a foam resin cylindrical plug 2 at the tail end of a cylindrical steel brush 1;
The cylindrical steel brush 1 and the foam resin cylindrical stopper 2 can be integrated. This embodiment allows for faster insertion into the tube.

FIGS. 5, 6, 7, and 8 show modified examples of the steel brush l according to the present invention, and the structure of the steel brush, the arrangement, pinch, and thickness of the brush wire 5 are shown in FIG. This example illustrates that an appropriate shape and structure can be formed depending on the size of the tube, the scale condition of the inner wall of the tube, etc.

〔Effect of the invention〕

In the case of the cooler tubes shown in Examples, 192 wooden tubes were cleaned in three groups, and the theoretical cleaning time was about 10 minutes. The conventional cleaning method using round steel required about 6 hours, so the working time was reduced to several times less.

In addition, when cleaning with foam resin shot, it was necessary to repeatedly propel the shot several times to clean firmly attached scale, but with the cleaning tool of the present invention, it is possible to completely clean in one time. became possible.

As described above, the cleaning tool of the present invention exhibits excellent effects both technically and economically due to its improved cleaning effect and shortened working time.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the fluid pipe propulsion cleaning tool of the present invention, FIG. 2 is a sectional view taken along line AA, and FIG. 3 is a sectional view taken along line BB.
FIG. 4 is a partially sectional side view of another embodiment, FIGS. 5 and 7 are side views of other embodiments of the steel brush, and FIGS. 6 and 8.
The figures are front views of FIGS. 5 and 7, respectively. l... Steel brush 2... Foam resin cylindrical stopper 3
...Compressed air 4...Guide cup 5...Steel wire

Claims (1)

[Claims] 1. A fluid pipe interior propelling cleaning tool comprising a combination of a cylindrical steel brush having an outer diameter that is press-fitted into the inner diameter of a fluid pipe and a cylindrical plug made of foam resin.