JPH0244597B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a method for cleaning water supply pipes in office buildings, condominiums, hotels, hospitals, etc.

[Conventional technology]

When the water supply pipes of office buildings, condominiums, hotels, hospitals, etc. (hereinafter referred to as "buildings") get old, water called red water begins to come out. This occurs when the iron in the pipes (mainly steel pipes) that make up the water supply and distribution pipes dissolves and becomes ferric hydroxide, which precipitates and becomes iron rust, which is iron oxide (commonly known as red iron oxide). It has an impact on the human body as water for daily use such as drinking water, eating, and washing, and has an unfavorable effect on equipment such as hot water supply and air conditioning. The causes of this red water are the proliferation of bacteria due to the deterioration of the quality of the water source, the addition of purification agents to prevent this, the reduction in pipe durability due to the purification agents (chemical agents), and the progress of corrosion of the iron surface. Rust occurs in the water supply and distribution pipes due to the combined effects of many causes, which become rust lumps and adhere to the inner surface of the pipes, causing blockages and producing unpleasant odors.

For this reason, many cleaning methods have been developed and put into practice, such as completely replacing the water supply and distribution pipes, a pipe rehabilitation method called sandblasting in which abrasives such as sand are introduced into the pipes, and pipe lining methods. .

[Problem that the invention seeks to solve]

However, the method of completely replacing the water supply and distribution pipes is very time-consuming, especially if the pipes are corroded to the extent that they are unusable, and in some places, the walls of the building must be destroyed, which is expensive. In the sandblasting method, the abrasive that is put into the pipe is a powder, but not a fluid, so it is difficult to put it in.The inside of the pipe through which the abrasive is passed must be completely dried at once, and a considerable amount of pressure is required to pass the abrasive. This requires extensive equipment, large-scale equipment, and is time-consuming. The same applies to the pipe lining method, and it is undeniable that any method takes time to process, resulting in a prolonged water outage.

Therefore, the present invention provides a cleaning method that can clean water supply and distribution pipes in a short time using a simple device and without introducing solids such as abrasives into the pipes. (first invention). Further, after cleaning is completed, the cleaning effect is maintained by sterilizing bacteria in the water supply so that rust does not easily occur again (second invention).

[Means for solving problems]

In order to achieve the above object, in this invention, water supply and distribution pipes of a building are connected to a water receiving tank, a pump, a pumping pipe, and a pumping pipe system reaching an elevated water tank, and a water supply pipe is provided from near the secondary side of the elevated water tank through a water supply pipe. The water supply pipe system leading to the tap is divided into two parts, and a drainage tank with a drain pipe is combined at the end of the water supply pipe to form the drainage system, and a cleaning pump, a flow meter, and an ozone mixer with an ozone generator are sequentially installed in two of the drainage tanks. A first cleaning system for cleaning the pumping pipe system is formed by intervening and connecting between the next side and the secondary side of the pump, as close as possible to the starting end of the pumping pipe, and water is supplied on the secondary side of the elevated water tank. A cleaning pump, a flow meter, and an ozone mixer equipped with an ozone generator are sequentially inserted and connected to the part of the pipe as close to the beginning of the pipe as possible to form a second cleaning system for cleaning the water supply pipe system. An ultraviolet sterilizer having an on-off valve on the secondary side is interposed and connected to the secondary side of the ozone mixer of the second cleaning system to form a finishing cleaning system, and the pipe system of both the pumping pipe system and the water supply pipe system is While injecting highly concentrated ozone into the running water inside, the slime, rust, and rust lumps in each pipe system are removed and drained into the above drainage tank, taken out from the drainage pipe system, and then water is supplied from the elevated water tank using an ultraviolet sterilizer. The running water of the pipe is sterilized by ultraviolet rays for final cleaning (first invention). The building's water supply and distribution pipes are further divided into a pumping pipe system that reaches the water receiving tank, water pump, water pump, and elevated water tank, and a water supply pipe system that runs from the secondary side of the elevated water tank via the water supply pipe to the water tap. A drainage tank with a drainage pipe is combined at the end of the above water supply pipe to form a drainage system, and a cleaning pump, a flow meter, and an ozone mixer with an ozone generator are used to pump up water at the secondary side of the drainage tank and the secondary side of the pump. A first cleaning system for cleaning the pumping pipe system is formed by intervening and connecting to a part of the pipe as close to the starting end as possible, and on the secondary side of the elevated water tank, cleaning is carried out to a part as close to the starting end of the water supply pipe as possible. A pump, a flow meter, and an ozone mixer with an on-off generator are interposed and connected in sequence to form a second cleaning system for cleaning the water supply pipe system, and an ultraviolet sterilization system that has a bypass path and on-off valves on the primary and secondary sides. the second device
A final cleaning system is formed by intervening and connecting to the secondary side of the ozone mixer of the cleaning system, and high-concentration ozone is injected into the flowing water in both the pumping pipe system and the water supply pipe system. Slime, rust, and rust lumps are removed and drained into the above drainage tank and taken out from the drainage pipe system, and the running water from the elevated water tank is sterilized with ultraviolet rays using an ultraviolet sterilizer, and the water is then final cleaned.After the final cleaning, the water is pumped up. The first and second cleaning systems are removed from both the pipe system and the water supply pipe system, but the ultraviolet sterilizer is left unremoved so that water sterilized by ultraviolet rays can be continuously supplied after the fact (second invention). .

[Effect]

In the case of lifting pipes, water is flowed from the drainage tank through the first cleaning system to the lifting pipe and then to the elevated water tank using the cleaning pump of the first cleaning system, during which highly concentrated ozone is released in the first cleaning system. It is mixed into the running water in the pipeline from the ozone generator through the ozone mixer. Since ozone has a strong oxidizing power, the oxidation of slime, rust, and rust lumps is promoted and washed away by the pressure of running water. After the slime, rust, and rust lumps are removed and drained, a coating is created on the inner surface of the pipe by the oxidizing action of ozone to prevent new rust from adhering.

In the water supply pipe system, ozone at a high concentration is mixed with the water from the elevated water tank via the ozone mixer from the ozone generator of the second cleaning system, and as it flows into the water supply pipe, the strong oxidizing power of ozone is absorbed as described above. Using this method, slime, rust, and rust lumps are removed and flowed out, and a coating is created on the inner surface of the pipe to prevent new rust from adhering. In addition, the slime, rust, and rust lumps removed and discharged from the pumping pipe are taken out as appropriate through the water supply pipe through the water supply pipe via the elevated water tank or without passing through the elevated water tank, or are taken out as appropriate through the drain pipe from the drainage tank. The water is flowed back into the drainage system via a bypass path. In this way, by utilizing the properties of ozone, both the pumping pipe system and the water supply pipe system can be cleaned and treated in a short time.

Next, the water flowing through the water supply pipe system from the elevated water tank is sterilized by ultraviolet rays in an ultraviolet sterilizer, bacteria in the water supply is sterilized, and the pipes are finished cleaned to prevent slime from adhering to them (first invention).

After final cleaning, the first and second cleaning systems are removed from both the pumping pipe system and the water supply pipe system, but the ultraviolet sterilizer is not removed and the water inside the water supply pipe is continuously sterilized with ultraviolet light to eliminate bacteria. By continuing to prevent breeding, the above cleaning effect is maintained and slime,
This prevents the occurrence of rust and rust lumps (second invention).

〔Example〕

Examples of the present invention will be described below. Although the overall structure of the water supply and distribution pipes varies depending on the contents of the building, it still includes the water supply and distribution pipe's receiving tank 1, pump 2, pumping pipe 3, and the pumping pipe system 5 that reaches the elevated water tank 4, and the elevated water tank 4. The water supply pipe system 9 can be roughly divided into a water supply pipe system 9 extending from the vicinity of the secondary side 6 through a water supply pipe 7 to a water supply faucet 8, and the pumping pipe system 5 and the water supply pipe system 9, which are roughly divided, are each subjected to a first cleaning. A system 10 and a second cleaning system 11 are incorporated.

First, a drainage tank 14 with a drainage pipe 13 is combined with the end 12 of the water supply pipe 7 to form a drainage system 15. Reference numeral 16 denotes a drainage pump, which is used to appropriately take out drained slime, rust, and rust lumps from the drainage tank 14.

The first cleaning system 10 includes a cleaning pump 17 and a flow meter 1.
8. Ozone mixer 20 with ozone generator 19
Sequentially, on the secondary side of the drainage tank 14 and the secondary side of the pump 2, place 21 as close to the starting end of the pumping pipe 3 as possible.
It is used for cleaning the pumping pipe system by interposing and connecting it between the pipe and the pipe. A centrifugal pump is used as the cleaning pump 17, and the flow meter 18 has a float rod 22.
A floating flow meter that allows you to visually check the level of floating on the scale plate 23 can be used. The ozone generator 19 is of a silent discharge type, and receives oxygen from the oxygen cylinder 24 and generates it at a high concentration of 11000 ppm (1/m ³ ).
The amount of ozone generated is 1.19g/h (1/m ³ ), and a discharge pressure of 4Kg/cm ² is applied by a built-in pump to supply the ozone to the pipeline. The entire device is small and lightweight, and is a box-type device that is easy to carry via the handle 25, so that it can be transported and installed even in places with limited space. The first cleaning system 10 has a fluid pressure of 4 kg/cm ² due to the fluid pressure applied by the cleaning pump 17.
Highly concentrated ozone is mixed into the line under high pressure of and further via an ozone mixer 20. The ozone mixer 20 has a primary side connected to the flow meter 18 and a secondary side connected to a part 21 near the starting end of the pumping pipe 3, and has an ozone introduction nozzle near the inlet of the primary side of the cylindrical body 26. 27 is facing, and a mixing rod 28 is disposed in the longitudinal direction inside the cylindrical body 26.
It micronizes the water passing through it and converts it into gas (ozone).
The liquid (flowing water) is sufficiently mixed with the liquid (flowing water). In Figure 2, 29 is an oxygen pressure regulator, 30 is an oxygen hose, 31 is an oxygen flow meter, 32 is a power cord,
33 each indicates an ozone hose.

A cleaning pipe 34 is extended from the secondary side of the ozone mixer 20 of the first cleaning system 10 to the water receiving tank 1, and
A bypass pipe 35 extends to the drainage tank 14.

The second cleaning system 11 has a cleaning pump 3 installed at a site 6 as close as possible to the starting end of the water supply pipe 7 on the secondary side of the elevated water tank 4.
6. A flow meter 37 and an ozone mixer 39 with an ozone generator 38 are installed and connected in order to clean the water supply pipe system. These cleaning pump 36, flow meter 37, and ozone mixer 39 with ozone generator 38 have the same contents as those of the first cleaning system 10, so a description thereof will be omitted. 40 is a second bypass pipe, which connects the primary side of the elevated water tank 4 and the ozone mixer 39.
It is connected to the secondary side of the

As described above, the first cleaning system 10 and the second cleaning system 11 are combined with the pumping pipe system 5 and the water supply pipe system 9, and furthermore, the bypass passage [third bypass pipe 41] and the on-off valve 42 on the primary side and the secondary side, 43 and the ozone mixer 39 of the second cleaning system 11.
A finishing cleaning system 45 is formed by intervening and connecting to the next side. The ultraviolet sterilizer 44 includes a plurality of ultraviolet lamps 47 (four in FIG. 4) suspended inside a stainless steel vertical cylindrical case 48, with a double quartz tube 45 surrounding the branch line lamp body 46. condition. The running water enters the inside of the case 48 from the inlet 49, fills up there, and flows to the water supply pipe 7 from the outlet 50, but inside the case 48, it is irradiated with ultraviolet light from the ultraviolet lamp 47, and bacteria in the running water are sterilized. Reference numeral 51 is an acoustic sensor that detects when the quartz tube 45 is damaged by water hammer and cracks, or when any other abnormality occurs in the ultraviolet lamp 47, and activates the on-off valves 42 and 43 on the primary and secondary sides. I am trying to have it close automatically.

By forming the above-described first cleaning system 10, second cleaning system 11, finishing cleaning system 45, and drainage system 15 in combination with a water supply pipe of a building, the following cleaning process is performed.

(A) While injecting high concentration ozone into the flowing water in both the pumping pipe system 5 and the water supply pipe system 9, the slime, rust, and rust lumps in each pipe system are removed from the drainage tank 14.
The waste water is removed and drained, and taken out from the drain pipe system 15. At this time, the first cleaning system 10 and the second cleaning system 1
In combination with 1, both pipe systems 10 and 11 can be cleaned with ozone, and the cleaning time can be considerably shortened. The cleaning process time depends on the size of the building, but it can be done in about 2 hours for an 8-story office building. High concentrations of ozone exhibit extremely strong oxidizing properties, oxidizing slime, rust, and rust lumps until they crumble and can be easily washed away by water pressure. At the same time, it creates a coating on the inner surface of the pipe to prevent new rust from forming. Then, the water flowing through the water supply pipe system 9 from the elevated water tank 4 is sterilized by ultraviolet rays in an ultraviolet sterilizer 44 for final cleaning. This ultraviolet sterilization kills bacteria and prevents the recurrence of slime, rust, and rust lumps.

(B) The elevated water tank 4 and the water receiving tank 1 will be cleaned by the first cleaning system 10. The flowing water from the lift pipe 3,
When the water flows through the elevated water tank 4 to the water supply pipe 7, the first cleaning system 10 performs ozone cleaning, and the elevated water tank 4 along with the water pumping pipe 3.
In addition, the water receiving tank 1 can be cleaned by turning off the temporary water supply system 52 described below and applying ozone-containing running water from the first cleaning system 10 to the cleaning pipe 34. Note that the elevated water tank 4 may be cleaned with ozone from the second cleaning system 11 by using the second bypass pipe 40.

(C) Finish cleaning is performed by sterilizing the flowing water in the water supply pipe system 9 from the elevated water tank 4 with ultraviolet rays in the ultraviolet sterilizer 44.

By the way, FIG. 1 shows a temporary water supply system 52. This temporary water supply system 52 makes it possible to separately supply drinking water and other water for daily use during the above-mentioned cleaning by putting the existing water supply pipe into a so-called water cut-off state, and includes a temporary pump 53, a pressure tank 54, and a water receiving tank. 1 is provided with a temporary pipe 55 having one end connected to the water tap 8 at the other end. Of course, this temporary water supply system 52 is unnecessary if there is no need to separately supply domestic water when cleaning the water supply pipes.

Furthermore, the ultraviolet sterilizer 44 used for final cleaning can be used continuously to maintain the cleaning effect (second invention). That is, after finishing cleaning, the first and second cleaning systems 10 and 11 are removed from the flow direction of the water pumping pipe system 5 and the water supply pipe system 9, but the ultraviolet sterilizer 4 is removed.
No. 4 is left in place without being removed so that water can be supplied after the fact with ultraviolet sterilization. Compared to the pumping pipe system 5, the water supply pipe system 9 is a pipe system in which water flows every time the water tap 8 is opened, and is more likely to generate slime, rust, and rust lumps than the pumping pipe system 5, and an ultraviolet sterilizer 44 is arranged here. By continuing to do so, the flowing water of the water supply pipe system 9 is actively and intensively sterilized, preventing the re-occurrence of slime, rust, and rust lumps, and at the same time sustaining the cleaning effect.

〔Effect of the invention〕

Since this invention is as explained above,
The water supply pipe system of a building can be cleaned in a short time using a simple device with relatively little effort and without introducing solids such as abrasives into the pipe (first invention). It has the excellent advantage of maintaining a cleaning effect while preventing the reoccurrence of rust and rust lumps, and is economical with short processing times, so it is used in the water supply pipe systems of many buildings to revive the water supply pipe system. This can prevent the occurrence of red water.

Note that if the elevated water tank and the water receiving tank are also cleaned as shown in the example, the water supply pipe system can be cleaned more thoroughly, and maintenance of the water supply pipe system after cleaning becomes easier.

[Brief explanation of drawings]

Fig. 1 is a water supply and distribution pipe system diagram showing an embodiment of the cleaning method of the present invention, Fig. 2 is an explanatory diagram of a combination of cleaning equipment that becomes the first cleaning system, and Fig. 3 is an ozone mixer used in the first cleaning system. 4 is a sectional view of the ultraviolet sterilizer, and FIG. 5 is a cross-sectional view taken along the arrow line in FIG. 4. 1... Water tank, 3... Lifting pipe, 4... Elevated water tank, 5... Lifting pipe system, 7... Water supply pipe, 9... Water supply pipe system, 10... First cleaning system, 11... No. 2 Cleaning system, 15... Drainage system, 19... Ozone generator, 2
0... Ozone mixer, 44... Ultraviolet sterilizer, 45... Finish cleaning system, 52... Temporary water supply system.

Claims (1)

[Scope of Claims] 1. A water supply pipe system that connects the water supply and distribution pipes of a building to a water tank, a water pump, a water pump, a water tank, and an elevated water tank, and a water supply pipe that extends from the vicinity of the secondary side of the elevated water tank to a water supply faucet. A drainage tank with a drain pipe is combined at the end of the above water supply pipe to form the drainage system, and a cleaning pump, flow meter, and ozone mixer with an ozone generator are sequentially connected to the secondary side of the drainage tank and pumping water. A first pipe for cleaning the pumping pipe system that is interposed and connected to a part of the pump on the secondary side of the pump as close as possible to the starting end of the pumping pipe.
A cleaning system is formed, and a cleaning pump, a flow meter, and an ozone mixer equipped with an ozone generator are successively interposed and connected to the secondary side of the elevated water tank as close as possible to the starting end of the water supply pipe to clean the water supply pipe system. A second cleaning system is formed, and an ultraviolet sterilizer having a bypass path and an on-off valve on the primary and secondary sides is interposed and connected to the secondary side of the ozone mixer of the second cleaning system to form a final cleaning system. , While injecting high concentration ozone into the flowing water in both the pumping pipe system and the water supply pipe system, the slime, rust, and rust lumps in each pipe system are removed and drained into the above drainage tank, and from the drainage pipe system. A method for cleaning water supply and distribution pipes, which is characterized by taking out the water, and then using an ultraviolet sterilizer to sterilize the flowing water of the water supply pipe system from an elevated water tank with ultraviolet rays for final cleaning. 2 Separate the water supply and distribution pipes of the building into a water receiving tank, a water pump, a water pump, and a water pipe system that reaches the elevated water tank, and a water supply pipe system that runs from the vicinity of the secondary side of the elevated water tank via the water service pipe to the water tap. A drainage tank with a drain pipe is combined at the end of the above water supply pipe to form a drainage system, and a cleaning pump, a flow meter, and an ozone mixer with an ozone generator are sequentially installed on the secondary side of the drainage tank and the secondary side of the pump. A first pipe for cleaning the pumping pipe system, which is interposed and connected to the part of the pumping pipe as close as possible to the starting end.
A cleaning system is formed, and a cleaning pump, a flow meter, and an ozone mixer equipped with an ozone generator are successively interposed and connected to the secondary side of the elevated water tank as close as possible to the starting end of the water supply pipe to clean the water supply pipe system. A second cleaning system is formed, and an ultraviolet sterilizer having a bypass path and an on-off valve on the primary and secondary sides is interposed and connected to the secondary side of the ozone mixer of the second cleaning system to form a final cleaning system. , While injecting highly concentrated ozone into the flowing water in both the pumping pipe system and the water supply pipe system, the slime, rust, and rust lumps in each pipe system are removed and drained into the above drainage tank, and from the drainage pipe system. Then, the water flowing from the water supply pipe system from the elevated water tank is sterilized with ultraviolet rays using an ultraviolet sterilizer, and the water from both the pumping pipe system and the water supply pipe system is cleaned after finishing cleaning.
A method for cleaning water supply and distribution pipes, characterized in that the cleaning system is removed, but the ultraviolet sterilizer is left in place, so that ultraviolet sterilized water can be continuously supplied after the fact.