JP3080773U - Rust removal device for water pipe inner surface using rust dissolving chemical - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable rust removal of a water supply pipe laid in a detached house or the like by using only a minimum required amount of a chemical solution per household. SOLUTION: A pressure tank 11 accommodating a rust-dissolving chemical 12, and an air blower for supplying air 14 to the rust-dissolving chemical 12 by pushing air out of the tank by pressurizing air 14 into the pressure tank 11. 8 is provided so as to be portable. At the ceiling of the pressure tank 11, a chemical extraction pipe 15 is attached by vertically penetrating the lower end of the chemical extraction pipe 15.
Submerged in the chemical solution 12 for dissolving rust as a chemical solution outlet 15a and positioned near the inner bottom surface of the tank. At the upper end of the chemical solution outlet tube 15, a chemical solution supply pipe 17 having a diameter of 20 mm and a diameter of 13 mm
Are connected via the three-way switching cock 16. A chemical solution supply hose 21 that can be connected to a water supply tube is connected to the distal ends of the chemical solution supply tubes 17 and 18. With the pressure of the air 14 pumped from the blower 8 into the pressure tank 11,
The chemical solution 12 is transferred from the chemical solution withdrawal tube 15 to the chemical solution supply tube 17 or 1.
Then, a small amount of the solution is sent to the water supply pipe through the chemical solution supply hose 21 via the pipe 8.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an apparatus for removing rust from the inner surface of a water supply pipe using a rust dissolving chemical for dissolving and removing rust generated on the inner surface of a water supply pipe laid as a residential water supply pipe per household.

[0002]

[Prior art]

 Water supply pipes laid as residential water pipes generally use galvanized steel pipes after rising from the ground, so depending on the usage environment, they usually take 2-3 years. Oxidation begins to take place after about 10 years, just like iron rusts in the air, as well as the corrosion of the inner surface of the pipe gradually in water, and rusted red water comes out at the beginning of water use. As the aging progresses, the rust increases and the rust adheres to the dirt, lowering the pressure of the water coming out of the faucet, and drinking red water. There is a concern that the impact of this on health may be a concern.

[0003] Therefore, when red water comes out, it is necessary to remove rust generated on the inner surface of the water supply pipe to rehabilitate the water supply pipe and restore its function to the previous state.

[0004] As one method of removing rust on the inner surface of a water supply pipe, there is a method of dissolving rust in the pipe with a chemical solution. When using this chemical for dissolving rust, for example, when targeting water pipes laid in a multi-family building such as an apartment, put the chemical in an elevated water tank installed on the rooftop. Open all faucets (water taps) provided for each household for a required time to allow the chemical to reach the faucet through all water pipes, and then close all faucets and let them stand for a certain period of time. Has been done in the past.

[0005]

[Problems to be solved by the present invention] However, in the case of removing rust on the inner surface of the water supply pipe with the chemical solution for dissolving rust as described above, it is necessary to cover all apartment buildings, and it is not possible to carry out one household at a time. It was not. In other words, in condominiums and buildings, all households have an elevated water tank in the middle of the water supply system from the water pipe main buried underground to the faucet at the end of the water supply pipe. It is possible to inject chemicals into the water supply pipes for water supply, but it is not possible to selectively inject the chemicals into the water supply pipes of only one household out of many households. Since there was no open air partway along the road, the chemical could not be injected into the water supply pipe. Also, even if an atmosphere opening part is formed in the middle of the water supply pipe, the chemical solution cannot be sent using gravity like an elevated water tank, so a high-pressure pump, for example, will be used. However, in this case, since the feeding pressure cannot be adjusted, the chemical solution flows out from each faucet at a stretch, and it is difficult to stop the feeding of the chemical solution immediately after observing the condition of the chemical solution, which is wasteful. It is expected that the amount of the chemical solution that will flow will increase.

[0006] Therefore, the present invention provides a rust-dissolving chemical solution that can remove rust from a water supply pipe for each household not only in a detached house but also in an apartment house using only the minimum necessary amount of the chemical solution. An object of the present invention is to provide an apparatus for removing rust on the inner surface of a water supply pipe using the same.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a pressure tank containing a rust-dissolving chemical and a blower so as to be portable, and pressurizes the space above the rust-dissolving chemical in the pressure tank to dissolve the rust. An air discharge pipe connected to the blower is connected to the upper part of the pressure tank so that the chemical can be pushed out of the pressure tank, and inserted into the pressure tank through the ceiling of the pressure tank. One end of the drained chemical solution pipe is immersed in the chemical solution for dissolving rust and positioned near the bottom surface of the tank, and the other end of the chemical solution discharge pipe is connected to one end of the upstream end of the water supply pipe. It is configured to be connected to the other end of the supply hose, and further connected to the ceiling of the pressure tank with an air release pipe provided with an air release cock for adjusting the pressure of air in the pressure tank. .

[0008] When removing rust on the inner surface of a water supply pipe of a detached house or the like, a water stopcock provided in the middle of the water supply pipe is closed, then the meter is removed, and the water supply pipe located downstream of the meter mounting portion is removed. With the chemical supply hose connected to the base end, the chemical in the pressure tank is gradually injected into the water supply pipe from the chemical extraction pipe through the chemical supply hose by the pressure of the air pumped into the pressure tank by the operation of the blower. When all the taps are opened and the chemicals start flowing out of the taps, close the taps, stop the operation of the blower and allow the chemicals to stay in the pipes for a certain period of time, then remove the chemical supply hose from the water supply pipe. Attach the meter, open the stopcock and faucet, and close the faucet when the water coming out of the faucet becomes clear.

In addition, two types of liquid supply pipes having different diameters can be connected to the other end of the liquid discharge pipe via a three-way switching cock, and a liquid supply hose can be connected to the tip of each liquid supply pipe. With this configuration, it is possible to select and use a chemical supply pipe and a chemical supply hose that match the diameter of the water supply pipe, so that one cleaning device can clean two types of water supply pipes having different diameters. It can be performed.

[0010]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which a power cable 6 is mounted on a base plate 3 of a transport vehicle 1 having wheels 2 attached to the lower end of a frame 4 having a grip 4a at the top. A blower 8 is provided which can be operated and stopped by operating a switch 7 provided in the middle of the above, and an opening 9 provided at a center position of a ceiling is attached to and detached from a lid 10 on a support base 5 above the blower 8. A pressure tank 11 which can be opened and closed by means of a rust-dissolving chemical solution 12 is placed inside, fixed to the frame 4 by lashing with a lashing material 11a, and the air discharge of the blower 8 is performed. The other end of the air discharge pipe 13 having one end connected to the outlet 8 a is communicated with the pressure tank 11 from a required position on the ceiling of the pressure tank 11, and the air 14 discharged from the blower 8 is passed through the air discharge pipe 13. Chemical solution 1 in tank 11 To pressurize the chemical solution 12 to the outside of the pressure tank 11 by applying pressure to the space above.

In addition, a chemical solution discharge pipe 15 is penetrated in a required location on the ceiling of the pressure tank 11 in a vertical direction that is inward and outward of the tank, and one end (lower end) serving as a chemical solution suction port 15 a of the chemical solution discharge pipe 15 is formed. ) Is immersed in the chemical solution 12 and is positioned near the inner bottom surface of the tank, and a first chemical solution having a diameter of 20 mm is provided at the other end (upper end) serving as the chemical solution outlet 15 b of the chemical solution outlet pipe 15. A supply pipe 17 is connected via a three-way switching cock 16 to a second chemical supply pipe 18 having an opening / closing cock 19 in the middle with a diameter of 13 mm and a chemical liquid supply pipe 17. The liquid supply hose 21 having a diameter corresponding to the diameter of the supply pipes 17 and 18 and having a water supply pipe connector 20 at the distal end thereof can be detachably connected to the base end thereof. Air in the space The chemical solution 12 pushed into the chemical solution discharge pipe 15 from the chemical solution suction port 15 a by the pressure of the chemical solution supply port 17 or 18 by operating the three-way switching cock 16 and the opening / closing cock 19, passes the chemical solution supply hose 21. Through the water pipe.

Further, a gauge tube 24 having a pressure gauge 22 and a safety valve 23 attached thereto is set up at a required location on the ceiling of the pressure tank 11 so as to communicate with the inside of the pressure tank 11, and the air pressure in the pressure tank 11 is reduced. It is possible to monitor and to branch-connect an air release pipe 26 provided with an air release cock 25 in the middle of the gauge pipe 24, and to release the air 14 in the pressure tank 11 by operating the air release cock 25. The pressure in the pressure tank 11 is adjusted so that the flow rate of the chemical solution 12 through the chemical solution supply hose 21 can be controlled. Further, a drain valve 27 having a drain valve 27 is provided at a lower part of the side wall of the pressure tank 11. A drain pipe 28 is connected to drain the drain in the pressure tank 11.

In FIG. 1, CV indicates a check valve provided in the middle of the chemical supply pipes 17 and 18.

In the above description, the chemical liquid supply pipe 17 having a diameter of 20 mm and the chemical liquid supply pipe 18 having a diameter of 13 mm are connected to the chemical liquid outlet 15 b of the chemical liquid outlet pipe 15 via the three-way switching cock 16. The diameter of the water supply pipes laid in this area is divided into two (approximately 90% or more) of 20 mm and 13 mm, so that it can be applied to water pipes of any of these diameters. .

When the rust removing device of the present invention having the above configuration is used to clean, for example, rust on the inner surface of a water supply pipe laid in a detached house, the rust removal apparatus is installed in the middle of the water supply pipe. After removing the meter, the distal end of the chemical solution supply hose 21 is connected to the base end of the water supply tube on the downstream side after the meter is removed, and the chemical solution 12 is fed into the water supply tube at a small flow rate. .

More specifically, as schematically shown in FIG. 2, a water supply pipe 30 for a detached house 29 is branched from a water pipe main pipe 32 buried in the ground under a road 31 or the like. Then, it is drawn into the house 29 via the ground in the premises of the house 29, and a faucet 33 as a water tap is attached to a tip thereof. A water stopcock 34 and a meter 35 are attached in order from the side.

Therefore, a required amount (for example, 10 liters) of the colored rust-dissolving chemical solution 12 is stored in the pressure tank 11 in advance, and the chemical solution supply pipe having the same diameter as the diameter of the water supply pipe 30 to be applied. With the corresponding chemical solution supply hose 21 attached to 17 or 18, the water stopcock 34 is closed, the meter 35 is removed, and the water supply pipe located downstream from the mounting position of the meter 35 is removed. The distal end of the chemical solution feeding hose 21 is connected to the base end of the hose 30 via the connector 20. At this time, as shown by the solid line in FIG. 1, when connecting the chemical supply hose 21 to the chemical supply pipe 17, the open / close cock 19 is closed, and the three-way switching cock 16 is connected to the chemical supply pipe 17 and the chemical extraction pipe 1. 5 is switched to a position where it communicates.

In the above state, when the switch 7 of the blower 8 is turned on to start the operation of the blower 8, the air 14 is pressure-fed from the blower 8 through the air discharge pipe 13 into the pressure tank 11. Therefore, as the pressure in the space above the chemical solution 12 in the pressure tank 11 increases, the chemical solution 12 is pushed into the chemical solution discharge pipe 15 from the chemical solution suction port 15a at the lower end, and further, the chemical solution supply pipe 17 and the chemical solution delivery The chemical solution 12 is fed little by little into the water supply pipe 30 via the supply hose 21. At this time, the pressure in the pressure tank 11 is monitored by the pressure gauge 22, and when the pressure becomes higher than the set value, the air bleed cock 25 is operated to bleed the excess air 14 through the air bleed pipe 26. Thus, adjustment is made so that the chemical solution 12 is sent into the water supply pipe 30 in a small amount. When all the faucets 33 in the house 29 are opened, the water in the water supply pipe 30 flows out of the faucet 33, and the chemical solution 12 moves down the water supply pipe 30 to the downstream side. When the colored chemical solution 12 flows out of the faucet 33 attached to the water supply pipe 30 at a small flow rate, the faucet 33 is closed, and thereafter the outflow of the chemical solution 12 from all the faucets 33 is confirmed. Then, all the faucets 33 are closed. As a result, the chemical liquid 12 has reached all the water supply pipes 30. Next, the three-way switching cock 16 is operated to close the chemical liquid supply pipe 17 and stop the operation of the blower 8. The tube 30 is allowed to stand for a certain period of time until the rust on the inner surface is dissolved.

After a certain period of time, the chemical supply hose 21 is removed from the water supply pipe 30. Subsequently, the meter 35 that has been removed is attached to the water supply pipe 30 and then the water stopcock 34 is opened. Open 33. As a result, after a while, the water flowing out of the faucet 33 becomes transparent, so that the faucet 30 is closed at that time, and the clear water flows out from all the faucets 30, and all the faucets 30 are flushed. By closing, the rust removal operation of the water supply pipe 30 is completed. By regularly performing the above rust removal work, the soundness of the water supply pipe 30 can be maintained for a long time.

In the above, since the pressure of the air 14 pumped from the blower 8 is lower than the pressure generated by the pump, the pressure can be easily adjusted by operating the air bleeding cock 25. Is fed into the water supply pipe 30 in a small amount so as to reach the faucet 33 at the tip, so that the chemical solution 12 does not flow out at once from the faucet 33 but flows out at a small flow rate. The faucet 33 can be closed and opened while observing the state of the color density (whether or not water is mixed in) 12 and the like, so that the chemical solution 12 can be sent and stopped with a sufficient margin, thereby enabling the use of the chemical solution 12. The required amount of the chemical solution 12 can be reduced to the minimum required.

In the above-described embodiment, the supply of a chemical solution having a diameter of 20 mm to the chemical solution outlet 15 b of the chemical solution outlet pipe 15 is performed so that the water supply pipe having a diameter of 20 mm or the water supply pipe having a diameter of 13 mm can be used. The case where the pipe 17 and the chemical solution supply pipe 18 having a diameter of 13 mm are branched and connected is shown. However, when a dedicated rust removing device for only one of the water supply pipes is used, the diameter of the chemical solution discharge pipe 15 is determined. May be set to 20 mm or 13 mm, and an opening / closing cock may be provided in the vicinity of the distal end to connect the chemical solution supply hose 21. Also, the safety valve 23 and the air release cock 25 may be combined. In addition, in the embodiment, the case where the blower 8 and the pressurized tank 11 are mounted on the transport trolley 1 has been described, but if the transport trolley 1 can be carried, the transport trolley 1 is not used. Although the description has been made on the case of a detached house, it is apparent that the present invention can be applied to a single-family apartment, and that various changes can be made without departing from the scope of the present invention.

[0023]

[Effect of the invention]

 As described above, according to the rust removing device for the inner surface of the water supply pipe using the rust-dissolving chemical solution of the present invention, the pressure tank containing the rust-dissolving chemical solution and the blower are provided so as to be portable. The air discharge pipe connected to the blower is connected to the upper part of the pressure tank so that the upper space of the rust-dissolving chemical can be pressurized by applying pressure to the rust-dissolving chemical by pushing it out of the pressure tank, and One end of the chemical solution discharge pipe inserted through the ceiling of the pressure tank and inserted into the pressure tank is immersed in the chemical solution for dissolving rust and positioned near the tank inner bottom surface, and the other end of the chemical solution discharge pipe is One end is connected to the upstream end of the water supply pipe, the other end is connected to the other end of the chemical solution supply hose, and the pressure of the air in the pressure tank is adjusted to the ceiling of the pressure tank. Air bleed with air bleed cock Since the tube is connected, remove the meter in the middle of the water supply pipe, connect the chemical supply hose to the water supply pipe, and send the chemical through the chemical hose to the water supply pipe with the pressure of the air stored in the pressure tank. By doing so, the rust removal work on the inner surface of the water supply pipe can be carried out for each household, and at this time, the pressure for feeding the chemical can be adjusted by operating the air release cock, and a small amount of the chemical can be used. Since the liquid can be sent to the faucet, the faucet can be opened and closed while watching the state of the chemical flowing out of the faucet, and the chemical can be sent and stopped freely. In addition, two types of liquid supply pipes having different diameters can be connected to the other end of the liquid discharge pipe via a three-way switching cock, and a liquid supply hose can be connected to the tip of each liquid supply pipe. By adopting the above configuration, the three-way switching cock can be used to switch the chemical solution feeding system, so that rust removal work can be performed without problems even for water pipes with different diameters. Demonstrate.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of a rust removing device for an inner surface of a water supply pipe using a rust-dissolving chemical solution of the present invention.

FIG. 2 is a schematic view showing a state where a rust removing operation is being performed on a water supply pipe of a detached house.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transport cart 8 Blower 11 Pressure tank 12 Chemical liquid 13 Air discharge pipe 14 Air 15 Chemical liquid take-out pipe 16 Three-way switching cock 17, 18 Chemical liquid supply pipe 21 Chemical liquid supply hose 25 Air release cock 26 Air release pipe

Claims (2)

[Utility model registration claims] 1. A pressure tank containing a rust-dissolving chemical solution and a blower are provided so as to be portable, and the space above the rust-dissolving chemical solution in the pressure tank is pressurized to allow the rust-dissolving chemical solution to flow out of the pressure tank. An air discharge pipe connected to the blower is connected to the upper part of the pressure tank so that the pressure can be applied, and one end of the chemical solution discharge pipe inserted into the pressure tank through the ceiling of the pressure tank and inserted into the pressure tank is rusted. It is immersed in the solution for dissolution and is located near the bottom surface in the tank, and the other end of the solution take-out pipe is connected to the other end of the solution supply hose so that one end is connected to the upstream end of the water supply pipe. So that
Further, a water supply using a chemical solution for dissolving rust, characterized in that it has a configuration in which an air vent pipe provided with an air vent cock for adjusting the pressure of air in the pressure tank is connected to the ceiling of the pressure tank. Rust removal device for pipe inner surface. 2. A chemical liquid supply pipe having two different diameters is connected to the other end of the chemical liquid discharge pipe via a three-way switching cock, and a chemical liquid supply hose can be connected to a tip of each chemical liquid supply pipe. An apparatus for removing rust on the inner surface of a water supply pipe using the chemical solution for dissolving rust according to claim 1.