KR20240062442A - Pipeline cleaning method and system for reducing red water - Google Patents

Abstract

The present invention provides a bypass pipe connecting the upstream and downstream sides of the first water valve with the first water valve in between when performing pulsation flow cleaning within the cleaning section set between the first water valve and the second water valve. After construction, water supply pipe cleaning can be performed using compressed air while supplying cleaning water through the bypass pipe. Therefore, it is possible to prevent water hammer generated by repeated opening and closing of the first water sluice valve from affecting the pipe on the upstream side of the washing section, causing water damage to occur due to foreign substances generated outside the washing section after pipe cleaning is completed.

Description

Pipeline cleaning method and system for reducing red water}

The present invention relates to a drip reduction pipe cleaning method, and more specifically, to a drip reduction pipe cleaning method that prevents the occurrence of dripping water by preventing foreign substances from being separated by water hammer upstream of the cleaning section when cleaning water pipes using pulsating waves. It is about the construction method and the pipe cleaning system for it.

Pipe cleaning is performed to remove foreign substances such as sediment, rust, slime, or corrosion products generated inside water pipes and improve water quality.

When water pipes that supply tap water are used for a long time after installation, foreign substances such as sediment, rust, slime, or corrosion products are deposited on the inner walls of the pipes, which interferes with the smooth flow of water. In addition, these foreign substances trapped in the pipe escape from the inner wall of the pipe when rapid control of water flow occurs within the pipe, worsening water quality. As the foreign substances released from the inner wall of the pipe are discharged together with the tap water, the tap water turns red. This is called an enemy.

To solve this problem of water leakage, pipe replacement and pipe cleaning are performed. Usually, replacing water pipes buried underground is not economical in terms of cost, and there is a risk of causing inconvenience to residents due to water outages.

Therefore, it is necessary to perform pipe cleaning periodically or when necessary to prevent the occurrence of red water and maintain the quality of tap water. The Ministry of Environment requires regular cleaning of water pipes to improve the reliability of tap water. When cleaning pipes, cleaning sections are designated for each block or water supply area.

Pipe cleaning methods include the flushing method, swab pig method, and air scouring method.

The flushing method is a method of cleaning the water pipe by removing air pockets in the water pipe, filling the inside of the water pipe with clean water, and then increasing the flow rate. The flushing method is known to have the disadvantage of using a large flow rate of washing water and having a short period of time to show the effect of improving water quality.

The swap pig method is an industry that inserts a swap pig inside a water supply pipe to remove and clean foreign substances such as slime and biofilm formed on the inside of the pipe. The swap pig method is carried out by launching and recovering the pig using hydraulic pressure, but it is generally not appropriate in cases where the pig is severely deteriorated or the formation of a layer of foreign substances such as scale due to corrosion is excessive.

The pulsation flow cleaning method is a cleaning method that injects compressed air into the tap water flowing inside the water pipe at regular intervals to create water slugs, removes foreign substances such as sediment or biofilm attached to the inside, and discharges them to the outside. .

The pulsation flow cleaning method injects compressed air at regular intervals from the upstream side to the downstream when viewed in the direction in which tap water flows within the cleaning section where water valves are installed on both sides, and the discharge port is installed adjacent to the upstream direction of the water water valve located on the downstream side. This is a method of discharging water containing foreign substances removed through a process, i.e. contaminated water, to the outside. For this pulsating flow cleaning, cleaning water must be supplied to the section where cleaning is performed. In other words, the pipe in the cleaning section is filled with water and compressed air is fired to discharge contaminated water containing separated foreign substances. The upstream water drain valve is opened to supply cleaning water (tap water) again and compressed air is fired. In this way, in the pulsation flow cleaning method, the water control valve located upstream of the part where compressed air is injected is periodically opened and closed to supply water flow for cleaning.

The pipe cleaning method is selected by comprehensively considering the soundness of the pipe, the state of contamination inside the pipe, the installation location of the pipe, the diameter of the pipe, etc. The pulsation flow cleaning method is a method with a low risk of damaging the pipe, and is relatively It has the advantage of being easy to perform, and is generally applied to water pipes with a diameter of 80 to 200 mm.

However, the pulsation flow cleaning method has the disadvantage of temporarily increasing the possibility of water leakage after cleaning the pipe. The water hammer generated in the process of periodically opening and closing the upstream water drain valve to supply washing water acts on the upstream side of the washing section to separate foreign substances inside the upstream pipe of the upstream water drain valve. Therefore, when the water is turned on after the washing of the washing section is completed, the foreign substances separated from the upstream side of the washing section are discharged together with the tap water in the user's area and are discharged into the water.

The present invention was developed to solve the above problems, and is designed to prevent the water hammer generated by the repeated opening and closing of the upstream water drain valve from affecting the pipe on the upstream side of the washing section and causing water damage. The purpose is to provide a reduction pipe cleaning method and a pipe cleaning system for the same.

According to one aspect of the present invention, it is a pipe cleaning method for reducing dripping water to prevent dripping water from occurring after cleaning is completed due to foreign substances separated from the water pipe at the upstream of the washing section, wherein the first water valve on the upstream side and the first water drain valve on the downstream side are used. Setting a washing section between the second water drain valves; Closing the first water control valve and the second water control valve, preparing a first inspection port on a downstream side adjacent to the first water control valve and a second inspection port on an upstream side adjacent to the second water control valve; Installing a bypass pipe in a water pipe that can supply washing water from upstream of the first water valve to downstream of the first water valve, with the first water valve in between; A cleaning preparation step including connecting a compressed air supply pipe that supplies compressed air provided from a compressed air injection device to the compressed air inlet of the first inspection port, and connecting a discharge pipe so that contaminated water is discharged to the outside from the second inspection port; And in a state where the first water sluice valve and the second water sluice valve are closed, water is introduced into the washing section through the bypass pipe and compressed air is fired from the compressed air injection device to the compressed air inlet to pipe the water pipe in the washing section. It includes a washing step in which foreign substances are separated from the inner wall of the , and contaminated water containing foreign substances is provided to a filter.

According to another aspect of the present invention, the inner wall of the water pipe in the washing section defined between the first water valve and the second water water valve is cleaned, and foreign substances separated from the water pipe upstream of the washing section generate water after the cleaning is completed. A water reduction pipe cleaning system for preventing water damage, comprising: a first inspection port installed adjacent to the first water valve within the cleaning section; a second inspection port installed adjacent to the second water valve within the washing section; A compressed air injection device provided to generate compressed air and provide it periodically or intermittently, and connected to the compressed air inlet of the first inspection port; And one end and the other end are connected with the first water valve in between, so that water upstream of the first water valve can flow into the washing section downstream of the first water valve in a closed state. A water reduction pipe cleaning system including a bypass pipe is provided.

According to an embodiment of the present invention, one end of the bypass pipe is connected to a water supply pipe upstream of the first water valve, and the other end of the bypass pipe is connected to the first inspection hole.

According to an embodiment of the present invention, the discharge pipe is connected to a filter located on the ground, and the filter filters the polluted water discharged from the discharge pipe and discharges the filtered water to the outside to prevent environmental pollution caused by the polluted water. prevent.

According to an embodiment of the present invention, the bypass pipe includes a control valve for controlling the supply amount and a flow meter for detecting the flow rate, and is formed to be able to adjust the cleaning flow rate.

According to an embodiment of the present invention, the filter includes a main body; A cover detachably coupled to the upper part of the main body; a top plate coupled to the top of the main body and forming a buffer space between the cover and the top of the main body; an introduction pipe connected to the discharge pipe and introducing contaminated water provided from the discharge pipe into the buffer space; and; and a cylindrical filter in which a plurality of filter installation openings are formed on the top plate and installed to extend into the main body through the filter installation openings, wherein contaminated water introduced through the inlet flows in the buffer space. As the direction changes, it is buffered and then flows into the cylindrical filter.

According to the water reduction pipe cleaning method and system according to the present invention, pulsation flow cleaning is performed while supplying washing water through the bypass pipe in a state in which the first water water valve is blocked, that is, the first water water valve does not repeat opening and closing operations. Since this is done, it is possible to prevent foreign substances from being separated from the upstream of the washing section to the inner wall of the water pipe due to water hammer, thereby preventing dripping water from occurring after washing is completed.

According to the present invention, pulsation flow cleaning is possible without repeated opening and closing of the first water valve, thereby reducing the work burden caused by periodic opening and closing control of the first water water valve.

According to the present invention, pulsating flow cleaning of water pipes is possible while preventing the generation of water even in water pipes with an upward gradient from upstream to downstream.

Figure 1 is a configuration diagram of a pipe cleaning system for the water reduction pipe cleaning method according to the present invention.
Figure 2 is a flowchart for explaining the water reduction pipe cleaning method according to the present invention.
Figure 3 is a cross-sectional view of a filter according to the present invention.

Hereinafter, specific details for implementing the present invention will be described with reference to the attached drawings. Also, in describing the present invention, if it is determined that related known functions may unnecessarily obscure the gist of the present invention as they are obvious to those skilled in the art, the detailed description thereof will be omitted.

Figure 1 is a configuration diagram of a pipe cleaning system for the water drop reduction pipe cleaning method according to the present invention, and Figure 2 is a flowchart for explaining the water drop reduction pipe cleaning method according to the present invention.

Referring to the drawing, the water reduction pipe cleaning method according to the present invention is a cleaning section setting step (S10), in which the first water valve 110 on the upstream side and the second water valve on the downstream side are used on the water pipe 100 through which water flows. A washing section (C) is set between the water drain valves (120).

The first water valve 110 and the second water valve 120 are valves that are installed in the pipe and allow or block the flow of water through opening and closing.

The first water valve 110 is located upstream of the water pipe 100 in the direction in which water flows. The first water valve 110 may block water from flowing into the washing section along the water pipe 100.

The second water valve 120 is located downstream of the pipe 100 in the direction in which water flows. The second water valve 120 may block water from flowing outside the washing section along the water pipe 100.

In general, when constructing a water pipe, water control valves are generally installed at intervals of 1 to 3 km to stop the running water inside the water pipe and control the water quantity, and a water control valve seal is installed so that the manager can access the water control valve. there is.

The first water control valve 110 and the second water control valve 120 may be water control valves already installed in the water control valve room during construction of the water pipe. However, it is not limited to this. When the washing section is set to a section other than between already installed water valves, for example, when additional installation of at least one of the first and second water valves 110 and 120 is required, the water pipe 100 buried in the ground The ground can be excavated to expose this and a water control valve can be installed in the water pipe 100.

According to the present invention, the area between the first water valve 110 installed on the upstream side and the second water valve 120 installed on the downstream side is set as a cleaning section, and pulsation flow cleaning is performed with the tap water supply to the user blocked. do.

When the washing section is set, the first water control valve 110 and the second water control valve 120 are closed to block the flow of water through the washing section.

Next, a washing preparation step (S20) is performed. In the cleaning preparation step (S20), first, an inspection hole is installed (S30). Inspection ports 130 and 150 are installed in the water pipe 100 on the downstream side adjacent to the first water valve 110 and on the upstream side adjacent to the second water valve 120. In this specification, among the inspection ports 130 and 150, the inspection port installed adjacent to the downstream side of the first water valve 110 is referred to as the first inspection port 130, and the inspection hole installed adjacent to the upstream side of the second water valve 120 is referred to as the first inspection port 130. The inspection port is referred to as the second inspection port (150).

Through the inspection ports (130, 150), the soundness of the water pipe pipe, such as whether the water pipe pipe is damaged, and the state of contamination are checked, and after the pulsation flow cleaning is completed, the contaminants are properly removed by cleaning the pipe through the inspection ports (130, 150). You can check whether it has been done or not.

According to the present invention, a compressed air injection device 200 is provided on the ground. The compressed air injection device 200 is provided in the form of a vehicle or a facility that can be moved by a vehicle.

The compressed air injection device 200 includes a compressor 210 and a pulsation flow generator 220.

The compressor 210 generates compressed air to be injected into the washing section. The pulsation flow generator 220 includes a solenoid valve and a timer. The solenoid valve is an air control valve. The pulsation flow generator 220 controls the supply of compressed air generated by the compressor 210 through the air supply pipe 230. The injection pressure injected through the air supply pipe 230 can be set through the solenoid valve. The timer can determine the injection interval of compressed air supplied through the air supply pipe 230, that is, the interval, by adjusting the opening and closing interval of the solenoid valve.

In addition, the pulsation flow generator 220 is provided with a setting input unit in the form of a touch screen so that the operator can adjust the injection pressure and injection interval.

The air supply pipe 230 is connected to the first inspection port 130. Compressed air may be supplied at time intervals set by control of the pulsation flow generator 220. That is, the supply and blocking of compressed air through the air supply pipe 230 is performed repeatedly. As compressed air is supplied periodically through repeated supply and interruption through the water pipe, it shocks the layer of foreign substances inside the pipe in the form of pulsation waves, and foreign substances deposited inside the water pipe can be effectively peeled off by these shock waves. .

According to the present invention, a filter 300 is provided on the ground. The filter 300 is provided to filter water containing foreign substances and discharge the filtered water.

The filter 300 is disposed at a position higher than the water pipe 100, specifically higher than the second inspection port 150 through which contaminated water is discharged from the water supply pipe, for example, on the ground, and the second inspection port 150 and the discharge pipe 330. It is connected to Contaminated water containing foreign substances generated by pulsation flow cleaning is introduced into the filter 300 through the discharge pipe 330, is filtered by an internal filter, and is then discharged to the outside through the discharge port 340. This can solve environmental problems caused by the discharge of contaminated water. The filtered and separated foreign substances are treated as waste, and the filtered clear water is discharged through the discharge outlet.

Figure 3 is a schematic structural cross-sectional view of the filter 300 used in the water reduction pipe cleaning method according to the present invention.

The filter 300 includes a main body 301 on which the filter is installed and a cover 308 detachably coupled to the upper part of the main body 301.

The top of the main body 301 is provided with a top plate 302 to partition the space below the top plate 302 and a buffer space 309 defined by the upper side of the top plate 302 and the inner space of the cover 308. .

An inlet pipe 303 is installed on the top plate 302 to guide contaminated water introduced through the discharge pipe 330 to the buffer space 309. The lower end of the inlet pipe 303 extends outward through the main body 301 and is connected to the discharge pipe 330.

A plurality of filter installation holes 304 are formed in the top plate 302, and a cylindrical filter 305 with an open top is inserted and installed through the filter installation openings 304. A plurality of filter installation holes 304 are formed in an annular shape based on the center of the top plate 302, and a cylindrical filter 305 is installed in each.

Contaminated water discharged from the discharge pipe 330 through the inlet pipe 303 is introduced into the buffer space 309, and after the impact of the pulsating flow in the buffer space 309 is alleviated, the contaminated water is discharged into the lower cylindrical filter 305. The filtered water is introduced into the main body 301. Thereafter, water is discharged to the outside through the outlet 340. The discharge port 340 is formed at a higher position than the bottom of the main body 301, and a residual water treatment port 306 is formed at the bottom of the main body 301.

Residual foreign substances contained in the water filtered through the cylindrical filter 305 are collected at the bottom of the main body 301, and water containing these residual foreign substances can be treated separately along with the foreign substances filtered through the residual water treatment port 306. .

Looking at the flow of water within the filter 300, the direction in which contaminated water is introduced into the filter 300 and the direction in which the contaminated water flows through the cylindrical filter 305 are different, and in some embodiments, are reversed. In other words, it prevents contaminated water from flowing into the cylindrical filter 305 under the strong pressure generated during pulsating flow cleaning. By preventing foreign substances from passing through the cylindrical filter 305 by pressure, filtration efficiency is increased and damage to the cylindrical filter 305 is prevented.

When installation of the first and second inspection ports 130 and 150 is completed with the first water valve 110 and the second water valve 120 closed in the water pipe 100, the bypass pipe 400 Installation (S40), preparing for compressed air injection by connecting the compressed air injection device 200 and the air supply pipe 230 (S50), and connecting the discharge pipe 330 and the filter 300 to filter contaminated water. A step of preparing contaminated water filtration (S60) is performed. Installation of the bypass pipe (S40), preparation for compressed air injection (S50), and preparation for filtration of contaminated water (S60) are included in the cleaning preparation step (S20).

The cover 140 of the first inspection hole 130 is provided with a connection port for the bypass pipe 400 and a compressed air injection port 144.

An air supply pipe 230 is connected to the top of the compressed air inlet 144. The compressed air inlet 144 may be arranged so that its lower end faces downstream within the water pipe 100. When compressed air is supplied into the water pipe 100 through the compressed air inlet 144, the compressed air inlet 144 fires compressed air toward the downstream.

According to the present invention, a bypass pipe 400 is provided that connects the upstream side of the washing section (C) and the inside of the washing section (C) with the first water valve 110 in between. The other end of the bypass pipe 400 is connected to the water pipe 100 by drilling a hole upstream of the first water valve 110 outside the washing section.

A control valve capable of controlling the flow of water is installed in the bypass pipe 400. Additionally, a flow meter capable of measuring flow rate may be installed in the bypass pipe 400. The operator can determine the supplied cleaning flow rate by selecting the diameter of the vise pipe 400 according to the size of the water pipe 100, and by selecting the opening degree of the control valve using the installed flow meter, the operator can determine the cleaning flow rate through the bypass pipe 400. The cleaning flow rate can be determined. The cleaning flow rate can be selected to achieve optimal efficiency according to the injection pressure and interval of compressed air.

With the first water valve 110 closed, a flow rate for cleaning is provided through the bypass pipe 400, and compressed air is provided at periodic intervals to perform pulsation flow cleaning.

One end of the bypass pipe 400 is drilled and connected to the water pipe 100 upstream of the first water valve 110 outside the washing section.

The other end of the bypass pipe 400 may be connected to a connector provided on the cover 140 of the first inspection hole 130. Through this, it is possible to reduce the number of perforations formed in the water pipe 100 and reduce the load of finishing work after the cleaning work is completed.

According to an embodiment of the present invention, the bypass pipe 400 can prevent shock from propagating upstream of the first water control valve 110 when compressed air is fired through the compressed air inlet 144. Since the bypass pipe 400 has a bent portion in its shape, it can induce water hammer relief to occur due to a change in flow flow.

One end of the discharge pipe 330 is connected to the discharge pipe connector of the cover 160 of the second inspection hole 150. The other end of the discharge pipe 330 is connected to the inlet pipe 303 of the filter 300.

When preparations for the cleaning operation are completed in this way, the cleaning step (S70) is performed.

A cleaning flow rate is provided through the bypass pipe 400, and the pulsation flow generator 220 in the compressed air injection device 200 intermittently controls the compressed air, and the compressed air injection port ( 144), the cleaning operation is performed in such a way that compressed air is provided periodically.

As compressed air is repeatedly fired and stopped, shock waves are provided to the inner wall of the water pipe 100 in the washing section, and through this, foreign substances attached to the pipe 100 can be effectively peeled off. As compressed air is fired while the washing water fills the washing section (C), foreign substances are separated from the inner wall of the water pipe 100 by the shock wave of the compressed air, and the contaminated water is located on the ground through the discharge pipe 330 by the pressure of the compressed air. It is pumped into the filter 300.

According to the present invention, the bypass pipe 400 is used to continuously supply washing water at the required flow rate for washing from the water pipe, thereby eliminating the problems that occur in the known method, that is, in the process of opening and closing the first water water valve 110. When a water hammer occurs, shock is transmitted to the inner wall of the water pipe 100 upstream of the first water valve 110, that is, upstream of the washing section (C), thereby preventing foreign substances from being separated from the water pipe on the upstream side outside the washing section. You can. In addition, it is possible to easily secure washing water at an appropriate flow rate through the bypass pipe 400.

High-pressure air, for example, 15 kg/cm2 or more, is fired from the compressed air inlet 144, and washing water is continuously supplied through the bypass pipe 400 while the first water valve 110 is closed, thereby eliminating shock waves. 1 Delivery to the outside of the washing section upstream of the water control valve 110 can be blocked.

Therefore, according to the present invention, when water is supplied to the water supply pipe after cleaning is completed in the washing section, it is possible to prevent dripping water from occurring due to foreign substances separated in the section upstream of the washing section.

Meanwhile, cleaning of water pipes is performed simultaneously with the filtration operation of discharged contaminated water. Contaminated water discharged through the discharge pipe 330 is filtered through the filter 300 and discharged through the discharge port 340 with foreign substances separated, that is, in the state of clear tap water. Therefore, additional environmental pollution caused by contaminated water can be prevented.

Although the present invention has been described in detail through representative examples above, the scope of the present invention is not limited to the description and expression of the examples described above. The scope of rights of the present invention cannot be limited due to changes or substitutions that are obvious in the technical field to which the present invention pertains, and the scope of rights of the present invention is determined not only by the claims described below but also by equivalents to these claims. .

100: Water pipe C: Washing section
110: first water valve 120: second water valve
130: first inspection hole 140: cover of first inspection hole
144: Compressed air inlet 150: Second inspection port
200: Compressed air injection device 210: Compressor
220: pulsation flow generator 300; filter
400: bypass pipe

Claims (9)

A pipe cleaning method to reduce dripping water to prevent dripping water from occurring after cleaning is completed due to foreign substances separated from the water pipe at the upstream of the washing section,
Setting a washing section between the first water valve on the upstream side and the second water valve on the downstream side;
Closing the first water control valve and the second water control valve, preparing a first inspection port on a downstream side adjacent to the first water control valve and a second inspection port on an upstream side adjacent to the second water control valve; Installing a bypass pipe in a water pipe that can supply washing water from upstream of the first water valve to downstream of the first water valve, with the first water valve in between; A cleaning preparation step including connecting a compressed air supply pipe that supplies compressed air provided from a compressed air injection device to the compressed air inlet of the first inspection port, and connecting a discharge pipe so that contaminated water is discharged to the outside from the second inspection port; and
In a state in which the first water sluice valve and the second water sluice valve are closed, water flows into the washing section through the bypass pipe and compressed air is fired from the compressed air injection device to the compressed air inlet to clean the water pipe in the washing section. A water reduction pipe cleaning method comprising a cleaning step of separating foreign substances from the inner wall and providing contaminated water containing foreign substances to a filter.
According to paragraph 1,
One end of the bypass pipe is drilled and connected to a water pipe upstream of the first water valve, and the other end of the bypass pipe is connected to the first inspection port.
According to paragraph 1,
The discharge pipe is connected to a filter located on the ground, and the filter filters the polluted water discharged from the discharge pipe and discharges the filtered water to the outside.
According to paragraph 1,
A water reduction pipe cleaning method, characterized in that the flow rate of washing water supplied through the bypass pipe is adjustable by a control valve.
A drip water reduction pipe that cleans the inner wall of the water pipe in the washing section defined between the first water valve and the second water water valve, and prevents dripping water from occurring after cleaning is completed due to foreign substances separated from the water pipe upstream of the washing section. As a washing system,
a first inspection port installed adjacent to the first water valve within the washing section;
a second inspection port installed adjacent to the second water valve within the washing section;
A compressed air injection device provided to generate compressed air and provide it periodically or intermittently, and connected to the compressed air injection port of the first inspection port; and
A bar connected to one end and the other end with the first water valve in between so that water upstream of the first water valve can flow into the washing section downstream of the first water valve when the first water valve is closed. A water reduction pipe cleaning system comprising a pass pipe.
According to clause 5,
One end of the bypass pipe is drilled and connected to a water pipe upstream of the first water valve, and the other end of the bypass pipe is connected to the first inspection port.
According to clause 5,
The bypass pipe is a water reduction pipe washing system, characterized in that it is equipped with a control valve that controls the flow rate of the supplied washing water and a flow meter that can measure the flow rate.
According to clause 5,
A water reduction pipe cleaning system comprising a filter to which the discharge pipe is connected, filtering the polluted water discharged from the discharge pipe, and discharging the filtered water to the outside.
According to clause 8,
The filter is,
main body;
A cover detachably coupled to the upper part of the main body;
a top plate coupled to the top of the main body and forming a buffer space between the cover and the top of the main body;
an introduction pipe connected to the discharge pipe and introducing contaminated water provided from the discharge pipe into the buffer space; and
A plurality of filter installation holes are formed on the top plate, and a cylindrical filter is installed to extend into the main body through the filter installation holes,
Contaminated water introduced through the inlet is buffered by changing the flow direction in the buffer space and then flows into the cylindrical filter.