JPH0415340Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is applicable to valves connected to fluid transport pipes, such as branch pipes for fire hydrants connected to water pipes and branch pipes for air vent valves. This invention relates to a device for cleaning the inside of a branch pipe for installing a valve.

[Conventional technology]

For example, in the aforementioned branch pipes for fire hydrants and air vent valves, internal corrosion is unavoidable over time, and in order to maintain their function as branch pipes, it is necessary to fit sleeves inside the branch pipes or It is important to renovate the inner surface by applying anti-rust paint to the inner surface. When performing such inner surface rehabilitation, it is necessary to remove rust and limescale accumulated on the inner surface of the branch pipe. Conventionally, the method was to simply remove the fire hydrant or air vent valve from the branch pipe and then insert a cleaning tool such as a brush through the opening where the fire hydrant or air vent valve was removed to scrape off rust, limescale, etc. from the inner surface of the branch pipe. was.

[Problem that the invention attempts to solve]

However, when using the conventional means, scraped rust and limescale enter the water pipes and are mixed into the tap water. Normally, water accumulates inside the branch pipe and there is no water flow, so a large amount of rust and scale accumulates on the inner surface of the branch pipe, resulting in scraping. The amount of rust and limescale that gets mixed into tap water is extremely large. Therefore, in order to prevent water contaminated with such rust and limescale from being supplied to consumption points such as homes,
Extensive post-treatment is required, such as extracting the water from the portion of the water pipe that includes the branch pipe connection and washing it with water.

An object of the present invention is to provide a device that can clean the inside of a branch pipe without mixing rust, water scale, etc. into the fluid transport pipe.

[Means for solving problems]

The characteristic configuration of the branch pipe cleaning device according to the present invention is as follows:
A cleaning tool that can be inserted into and removed from the branch pipe through the valve removal opening of the branch pipe, and a fluid discharge means for discharging the fluid in the branch pipe are provided. and,
The effects and effects thereof are as follows.

[Effect]

When a cleaning tool is inserted into the branch pipe through the valve removal trace opening to clean the inner surface of the branch pipe, the fluid in the pipe is discharged from the valve removal trace opening by the fluid discharge means, and the cleaning causes the branching. Material scraped from the inner surface of the pipe can be discharged to the outside together with the fluid inside the discharge pipe.

[Effect of idea]

Therefore, according to the present invention, there is no scraping material mixed into the fluid transport pipe due to the cleaning, and there is no need to deal with accidents such as cleaning the fluid transport pipe due to scraping material. It is now possible to provide a branch pipe interior cleaning device useful for cleaning the interior of branch pipes connected to water pipes for fire hydrants and air vent valves.

〔Example〕

Next, an example of the present invention will be shown.

As shown in Fig. 2, a part of the inner surface rehabilitation of a branch pipe 3 that is connected vertically to a water pipe 1 (an example of a fluid transport pipe) and has a fire hydrant 2 (an example of a valve) flange-jointed to its upper end. This is a device for cleaning carried out as a process, and as shown in FIG. It includes a rotating brush 6 that can be freely inserted into and removed from the branch pipe 3 through the opening 3A, and a water drainage treatment 7 that discharges water in the branch pipe 3.

The rotating brush 6 rubs against the inner surface of the branch pipe 3 by rotating and moving in the insertion/extraction direction.

The water discharge means 7 is externally mounted on the rotating shaft 5 so as to be rotatable relative to the rotating shaft 5, and is inserted into and removed from the branch pipe 3 together with the rotating brush 6,
A suction pipe 7A whose one end is located near the rotating brush 6, and a vacuum pump which is connected to the other end of this suction pipe 7A via a bellows lock hose 7B and sucks and discharges the water in the suction pipe 7A. 7C
It consists of. At one end of the suction pipe 7A,
A trumpet-shaped opening member 7b forming a suction opening 7a having a size approximately comparable to the cross-sectional area of the branch pipe 3 is attached.

8 is a generator that serves as a power source for the hand motor 4 and the vacuum pump 7C.

Next, an example of a method for rehabilitating the branch pipe 3 using the cleaning device A configured as described above will be explained in order of steps.

[1] Of the water pipes 1, as shown in Figure 2,
The water stop valves 9A and 9B located upstream and downstream of the connection part of the branch pipe 3 are closed.

[2] Remove the fire hydrant 2 from the branch pipe 3.

[3] As shown in FIG. 1, insert the rotating brush 6 into the branch pipe 3 through the fire hydrant removal opening 3A, and while operating the vacuum pump 7C,
The rotary brush 6 is rotated and moved in the insertion/extraction direction to scrape off rust and limescale deposited on the inner surface of the branch pipe 3, and discharge the scraped rust and limescale together with water through the suction pipe 7A.

[4] As shown in FIG. 3, after carrying out a rehabilitation process in which the inner surface rehabilitation sleeve 10 is closely fitted into the branch pipe 3, the fire hydrant 2 is connected to the branch pipe 3, and both water stop valves 9A, Open 9B.

According to the cleaning device A having the configuration of the above embodiment, when cleaning with the rotating brush 6, the water is suctioned and discharged by the water discharge means 7, so that the rust scraped off from the inner surface of the branch pipe 3 by the rotating brush 6 is removed. Since rust and limescale can be discharged together with water, the rust and limescale do not settle in the water pipe 1.

[Another example]

Another embodiment of the present invention will be shown below.

[1] In the above embodiment, the water discharging means 7 is of the suction and discharging type, but as shown in FIG. At the same time as forming the water channel 7D, there is a groove in the extraction direction at the tip of the rotating shaft 5.
That is, a nozzle 7E is provided that spouts water from the water channel 7D toward the fire hydrant removal trace opening 3A side, and the water jet from the nozzle 7E directs the water flow toward the fire hydrant removal trace opening 3A to the branch pipe 3.
It may be generated internally and discharged from the fire hydrant removal trace opening 3A. In addition, as a means for pressure-feeding water to the nozzle 7E via the waterway 7D, a means for connecting the pump 7F to the waterway 7D can be mentioned. Further, in this case, the upstream water stop valve 9A may be opened to use the water pressure for the discharge, but the water can be discharged even if the water pressure is not used at the same time.
Reference numeral 11 denotes a drainage case that guides drainage from the fire hydrant removal opening 3A laterally.

[3] In the above embodiment, a fire hydrant is shown as the valve 2, but the valve 2 can also be an air vent valve.

[4] In the above embodiment, a means for closely fitting the sleeve 10 and the branch pipe 3 was shown as an inner surface rehabilitation treatment means for the branch pipe 3; It may also be a means for applying paint.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention,
Figure 1 is a vertical sectional view of the main part, Figure 2 is a side view, Figure 3
The figure is a partially cutaway side view of the main part. FIG. 4 is a longitudinal sectional view of the main parts showing another embodiment of the present invention. 1... Fluid transport pipe, 2... Valve, 3... Branch pipe,
3A... Valve removal trace opening, 6... Cleaning, 7... Fluid discharge means, 7A... Suction pipe, 7C... Vacuum pump.

Claims (1)

[Claims for Utility Model Registration] 1. A cleaning device for cleaning the inside of a branch pipe 3 for attaching a valve connected to a fluid transport pipe 1 and having a valve 2 attached thereto, the cleaning device cleaning the inside of a branch pipe 3 for valve installation, which is connected to a fluid transport pipe 1 and has a valve removed from the branch pipe 3. A cleaning tool 6 that can be inserted into and removed from the branch pipe 3 through the opening 3A
and a fluid discharge means 7 for discharging the fluid in the branch pipe 3. 2. Cleaning inside a branch pipe according to claim 1, wherein the cleaning tool 6 is a rotating brush that rubs against the inner surface of the branch pipe 3 by rotating around an axis along the insertion/extraction direction. Device. 3. A suction pipe 7A in which the fluid discharge means 7 is inserted into the branch pipe 3 together with the cleaning tool 6, and one end of which is positioned near the cleaning tool 6.
and a vacuum pump 7C connected to the other end of the suction pipe 7A.