KR102584128B1 - Pipeline cleaning method for pig continuous launching, and apparatus used therefor - Google Patents

Abstract

The present invention is a pipe cleaning device and method in which the pipe cleaning operation progresses quickly by continuously inserting the pig 90. The pipe 10 is installed in the vertical direction in a branched shape so that the inside of the pipe is the inside of the pipe. A pig launch tube (20) in communication with the pig launch tube, a sealing cover (30) that can be opened and closed to inject the pig into the pig launch tube, a high pressure hose (40) for pushing the pig of the pig launch tube into the pipe, and the pig launch tube It includes an outlet valve 50 installed at the bottom of the.

Description

Pig continuous firing pipe cleaning method and device used therefor {PIPELINE CLEANING METHOD FOR PIG CONTINUOUS LAUNCHING, AND APPARATUS USED THEREFOR}

The present invention relates to a method for cleaning pig continuous firing pipes and a device used therefor. More specifically, the present invention relates to a pig continuous firing method and a device used therein. More specifically, the pig is continuously fired while water is flowing in a pipe such as a water pipe and the pig is passed through the water flow pressure. , relates to a cleaning method and device for removing water stains, scale, etc.

In the case of water pipes that supply drinking water to homes, businesses, etc., as the period of use elapses, scale accumulates inside the water pipes and causes scale or bacterial growth, so it is necessary to periodically clean the inside of the water pipes.

For such cleaning, a device and method for removing scale, etc. from inside the pipe by inserting a pig into the water pipe is widely known.

Figure 1 shows a conventional pipe cleaning device and method using a pig, and is shown in Patent Registration No. 10-1182363.

Referring to FIG. 1, the pipe cleaning device opens the inlet (1) formed in the water pipe (3) to insert the pig (5), and the cleaning target section where cleaning is performed opens water valves (4) on both outer sides of the cleaning target section. After everything is locked, propel the pig (5) with high-pressure water or high-pressure air and pass it at high speed.

Accordingly, the pig 5 moving at high speed can remove scale stuck on the inner wall of the water pipe 3 and then exit through the outlet 2 located next.

In the case of such a conventional pipe cleaning device and method, one pig performing cleaning in the cleaning target section must be propelled by high-pressure water or high-pressure air without stopping within the water pipe (3), so that it is discharged through the outlet (2). There is a problem that another pig (5) cannot be additionally inserted into the pipeline until the end.

This means that in a situation where repeated cleaning operations must be performed by sequentially inserting several pigs (5) into the cleaning target section to obtain good cleaning results, only one pig (5) can pass through the cleaning target section at a time. Therefore, there is a problem that the overall work time is delayed and the water shutoff time of the water pipe 3 becomes excessively long.

In addition, when the water pipe (3) is buried in the ground so as to extend horizontally and is inclined upward due to a hill, etc., the water pipe (3) is When the inlet (1) is opened to insert the pig into (3), the water remaining in the cleaning target section flows back and is ejected through the inlet (1), so the cleaning work cannot be performed until the ejection is completed and the work is not completed. There is also the problem of delay.

In addition, the area around the inlet (1) of the pig (5) is a puddle formed by removing soil or a concave inspection space used for inspection, so if water overflows and accumulates, it will make the surrounding environment messy and cause other problems such as future inspections. There are also problems that interfere with work.

The present invention was conceived from the above viewpoint, and the purpose of the present invention is to perform a cleaning operation of pipes such as water pipes using a pig, and the continuous input of the pig can be quickly performed to shorten the cleaning operation time of the pipe. The aim is to provide a pipe cleaning method and device that can minimize water outage time in pipes such as water pipes.

In addition, another object of the present invention is to eliminate or minimize the problem of water spouting or overflowing at the location where the pig is inserted into the pipe when cleaning the pipe by inserting the pig, thereby solving the problem of water accumulating in the puddle or inspection hole. Alternatively, a pipe cleaning method and device that can be minimized is provided.

The present invention relates to a pipe cleaning device for continuously firing pigs into a cleaning target section of a pipe extending in the horizontal direction through which water flows, wherein the pipe is installed in the vertical direction in a branched shape at one end of the cleaning target section. A pig launch tube whose interior is in communication with the inside of the pipe, a sealing cover installed on the pig launch tube that can be opened and closed to introduce pigs into the inside of the pig launch tube, and a pig launch tube connected to the pig launch tube to push the pig into the pipe. A high-pressure hose that supplies high-pressure fluid to the inside of the pig launch tube, and an outlet installed at the lower part of the pig launch tube to block and communicate the inside of the pig launch tube and the inside of the pipe to enable injection and launch of pigs into the pig launch tube. Characterized in that it includes a valve.

In addition, the present invention has another feature in that a drain hose that discharges water inside the pig launch tube is connected to the pig launch tube for injection of pigs.

In addition, in the present invention, the inner diameter of the pig launch tube is smaller than the outer diameter of the pig, so that the pig can be introduced into the pig launch tube by elastic deformation, and the lower port and upper port of the pig launch tube are connected and a blocking valve is installed in the middle. Another feature is that a bypass passage having a is installed so that water on the lower side of the pig can move to the upper side of the pig when the pig is introduced into the pig launch tube and moves downward between the lower port and the upper port. .

Additionally, another feature of the present invention is that the shut-off valve is a check valve that only allows water to move from the lower port to the upper port.

In addition, in the present invention, the high-pressure hose is connected to a water tank to receive high-pressure water by a high-pressure pump, the drain hose is installed with a drain pump to suck in and discharge water, and the pig launch pipe has an inner diameter of the pipe. The same thing has another feature.

Meanwhile, from another point of view, the present invention relates to a pig continuous firing type pipe cleaning method for cleaning a pipe in which the above-mentioned cleaning device is installed, wherein among the water water valves on both sides of the cleaning target section, the water valve on one end of the cleaning target section is provided. A preparation step of opening to allow water to pass, blocking the other end side water valve, and installing a water and pig discharge port in front of the other end side water valve; An input step of closing the outlet valve and opening the sealing cover to inject the pig into the pig launch tube; A firing step in which a pig is launched into the pipe by high-pressure fluid supplied from the high-pressure hose while the airtight cover is closed and the outlet valve is open; An additional input step of closing the outlet valve and opening the sealing cover to add additional pigs to the pig launch tube; While the pig in the firing step is passing through the pipe, an additional firing step in which the pig is additionally fired into the pipe by high-pressure fluid supplied from the high-pressure hose in a state in which the airtight cover is closed and the outlet valve is open; It is characterized by including.

In addition, the present invention provides a pig continuous launch type pipe cleaning method for cleaning a pipe in which the above-described cleaning device is installed, comprising the steps of closing the outlet valve and opening the sealing cover to inject the pig into the pig launch pipe; A firing step in which a pig is launched into the pipe by high-pressure fluid supplied from the high-pressure hose while the airtight cover is closed and the outlet valve is open; Close the outlet valve and open the sealing cover to add an additional pig to the pig launch tube. The pig is introduced in a state in which a predetermined amount of water is discharged through the drain hose, and the water flows into the bypass by the pig that descends upon injection. An additional input step to move to the upper side of the pig through the flow path; Another feature includes a; an additional firing step in which the pig is additionally fired into the pipe by high-pressure fluid supplied from the high-pressure hose while the sealing cover is closed and the outlet valve is opened.

The pipe cleaning method and device of the present invention includes a pig launch pipe installed in the vertical direction in a branched shape, a high-pressure hose equipped with a sealing cover and an outlet valve on the pig launch pipe, and connected to the inside of the pig launch pipe to supply high-pressure fluid. By including it, cleaning work is performed by pushing the pig into a pipe such as a water pipe, but the succeeding pig can be launched even while the preceding pig is progressing within the pipe, so continuous injection of the pig can be performed quickly, and the cleaning work can be done quickly. Time can be shortened and water outage times in pipes such as water pipes can be minimized.

In addition, in the present invention, when cleaning a pipe by inserting a pig, the cleaning work is performed in an on-line state with water (water) flowing in the pipe, and when the pig is inserted and fired, the sealing cover and the outlet valve are closed. Since either one has a structure that can be closed, even if the pipe extending horizontally in the ground is buried at an upward slope due to a hill, etc., the problem of water backflowing or spewing out through the pig launch pipe does not occur.

In addition, the present invention is configured to remove water from the pig launch tube by installing a drain hose on the pig launch tube, thereby enabling rapid introduction of the trailing pig and also solving or minimizing the problem of water overflowing from the pig launch tube when the pig is introduced. can do.

In addition, the present invention installs a bypass passage in the pig launch tube and makes the inner diameter of the pig launch tube smaller than the outer diameter of the pig so that the pig is injected through elastic deformation, so that even if water remains in the pig launch tube, the pig and the pig launch tube are connected. The inner friction force can offset the force of the pig floating and rising and maintain the pig's input state, so the pig can be easily lowered and inserted into the pig launch tube.

Figure 1 is an explanatory diagram illustrating a conventional pipe cleaning device using a pig.
Figure 2 is an explanatory diagram illustrating the configuration and operation of a pipe cleaning device according to an embodiment of the present invention
Figure 3 is a block diagram sequentially explaining the process of cleaning a pipe with a pig using a pipe cleaning device according to an embodiment of the present invention.
Figure 4 is an explanatory diagram illustrating the configuration and operation of the drain hose and bypass passage in the pipe cleaning device according to an embodiment of the present invention.

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

The pipe cleaning device according to an embodiment of the present invention is for continuously firing the pig 90 into the cleaning target section of the pipe 10 through which water flows, extending in the horizontal direction, and can be applied to the pipe supplying water. , In particular, it relates to a device suitable for cleaning water pipes by continuously inserting a pig (90).

Referring to FIG. 2, the pipe cleaning device of the present invention is a pig launch pipe (20) installed in the vertical direction in a branched shape at one end of the section to be cleaned, and the inside of the pipe 10 is in communication with the inside of the pipe 10. ), and a sealing cover 30 installed on the pig launch tube 20 that can be opened and closed to inject the pig 90 into the pig launch tube 20, and connected to the pig launch tube 20 to insert the pig 90. A high-pressure hose (40) that supplies high-pressure fluid to the inside of the pig launch tube (20) to push it into the pipe (10), and a high-pressure hose (40) installed at the lower part of the pig launch tube (20) to connect the inside of the pig launch tube (20) and the pipeline (10). It includes an outlet valve 50 that blocks and communicates the inside of the pig launch tube 20 to allow injection and launch of the pig 90 into the pig launch tube 20.

The pig launch tube 20 has a cylindrical shape with a short length and is installed to insert the pig 90 therein and launch it into the inside of the tube 10.

Since a normal water pipe extends in the horizontal direction and is a pipe 10 through which water flows, the pig launch pipe 20 is installed in the vertical direction in a shape in which the pipe 10 branches off at one end of the section to be washed, and the pig launch pipe 20 The upper part of the is exposed to the outside where the worker is.

Accordingly, the inside of the pig launch tube 20 and the inside of the pipe 10 meet each other in a T shape and have a branched shape so that the insides communicate with each other, so that the pig 90 of the pig launch tube 20 is connected to the pipe 10. You can go inside.

It is most desirable that the inner diameter of the pig launch tube (20) matches the inner diameter of the pipe (10), and the outer diameter of the pig (90) is larger than the inner diameter of the pig launch tube (20) or the inner diameter of the pipe (10) as in a typical case. It is made of urethane elastic material with a size of 5 to 10% and is injected into the pig launch tube (20) or pipe (10) through elastic deformation to pass through.

Forming the inner diameter of the pig launch tube 20 so that the pig 90 is elastically deformed even inside the pig launch tube 20 is due to the water remaining inside when the pig 90 is introduced into the pig launch tube 20. ) tries to float, thus interfering with the insertion operation. Therefore, if the pig 90 rubs against the inner wall in an elastically deformed state, it is advantageous to maintain the entered state by pushing it in even if there is residual water inside.

This makes it quick and easy to insert the pig 90 for continuous launch of the pig 90 along with the bypass passage 70, which will be described later.

Since the cleaning target section of the pipe 10 is a section where cleaning is performed while the pig 90 moves through the pipe 10, the location where the pig launch tube 20 is installed becomes the starting point of the cleaning target section, and the pig 90 moves. The discharge port 80 becomes the end point of the cleaning target section.

The airtight cover 30 is installed on the pig launch tube 20 and can be opened and closed to introduce the pig 90 into the pig launch tube 20, and is bolted to close the upper entrance of the pig launch tube 20. Alternatively, it can be configured to open and close the upper entrance of the pig launch tube 20 by opening and closing it through a hinged connection.

Since the sealing cover 30 must seal the inside of the high-pressure pig launch tube 20, a sealing material is installed at the contact area to ensure a firm seal.

The high-pressure hose 40 is connected to the pig launch pipe 20 and supplies high-pressure fluid with a higher pressure than the inside of the pipe 10 to the inside of the pig launch tube 20 to push the pig 90 into the pipe 10. It is a means of doing it.

The high-pressure hose 40 can be coupled to the sealing cover 30 to supply high-pressure fluid to the inside of the pig launch tube 20, or it can be connected to the side wall of the upper end of the pig launch tube 20.

It is most desirable for the high-pressure hose 40 to be supplied with high-pressure water from the water tank 45 by the high-pressure pump 42. Unlike high-pressure air, high-pressure water can quickly launch the pig 90 without compressing the air, so it has an operational response. This is fast.

The outlet valve 50 is an on-off valve installed at the lower part of the pig launch tube 20 to block and communicate with the inside of the pig launch tube 20 and the inside of the pipe 10.

The outlet valve 50 may be of various types, such as a knife gate valve or a ball valve, and may have the same inner diameter as the pig launch tube 20 when the valve is opened so that the pig 90 can pass through without being caught. It is preferable that a passage of a certain diameter is formed.

Due to the installation of the outlet valve 50, in the open state, the pig 90 can be fired toward the inside of the pipe 10 under the pressure of high-pressure water, and in the closed state, the pressure of the water in the pipe 10 increases. Blocks transmission to the pig launch tube (20).

Meanwhile, a drain hose 60 is connected to the lower part of the pig launch tube 20, which discharges water inside the pig launch tube 20 for the introduction of the pig 90.

When continuously firing the pig 90, the drain hose 60 is filled with water inside the pig launch tube 20 with the outlet valve 50 opened and closed, so water is used for the injection of the pig 90. It is a means of releasing it.

The drain hose 60 is connected to the water tank 45 and can be connected to suck and recover water by a separate drain pump or to discharge it at a predetermined point at the work site. A drain valve is installed so that it is in a locked state except when draining. Make it possible.

Meanwhile, a bypass passage 70 connecting the lower port 71 and the upper port 72 of the pig launch tube 20 and having a blocking valve in the middle may be installed in the pig launch tube 20.

The bypass passage 70 is such that when the pig 90 is inserted into the pig launch tube 20 and moves downward between the lower port 71 and the upper port 72, the water on the lower side of the pig 90 flows into the pig 90. It is possible to move to the upper side of .

Accordingly, even if the water inside the pig launch tube 20 is not sufficiently discharged by the drain hose 60, if the pig 90 is pushed into the pig launch tube 20 while the water is discharged from the drain hose 60, the remaining water The existing water can move to the upper side of the pig 90, making it quick and easy to insert the pig 90 without the water preventing the pig 90 from descending.

A blocking valve 73 is installed in the middle of the bypass passage 70 to prevent high-pressure water from flowing into the lower side of the pig 90 through the bypass passage 70 when high-pressure water is supplied by the high-pressure hose 40. Make sure there is no such thing.

The shutoff valve 73 is preferably a check valve that only allows water to move from the lower port 71 to the upper port 72.

For reference, a guide means may be installed to guide the pig 90 to proceed more smoothly to the outlet 80 at the location of the outlet 80, and the guide means may be installed to guide the pig 90 from the pipe 10 to the outlet 80. ) may be a screen board temporarily installed within the pipe 10 to guide the progress of the process.

Hereinafter, the pig continuous firing type pipe cleaning method for cleaning the pipe 10 on which the above-described cleaning device is installed will be described according to the sequence of FIG. 3 with reference to FIG. 2.

First, with the installation of the washing device of the above-described structure in the pipe 10, the discharge port 80 of the water and the pig 90 is located in front of the water control valve 12 at the end point of the section to be washed, that is, the other end of the section to be washed. ) is installed.

When the cleaning device and the discharge port 80 are prepared, among the water valves on both outer sides of the section to be cleaned, the water valve 11 on one end of the section to be cleaned is opened to allow water to pass, and the water valve 12 on the other end is opened. A preparatory step to block occurs. (Step S10)

The water (water) in the pipe 10 continues to flow to the cleaning target section through the water sluice valve 11 on one end of the water sluice valves on both outsides, which serves to propel the pig 90, and the other end side. Since the water drain valve 12 is blocked, water and the pig 90 are discharged through the discharge port 80.

After the preparation step, an input step is performed in which the pig 90 is introduced into the pig launch tube 20 by opening the sealing cover 30 while the outlet valve 50 of the pig launch tube 20 is closed (step S20).

When the pig (90) is inserted, the sealing cover (30) is closed, the outlet valve (50) is opened, and the pig (90) is injected by high-pressure water supplied from the high-pressure hose (40) with the outlet valve (50) open. A firing step is carried out in which it is fired into the pipeline 10. (Step S30)

The high-pressure hose 40 can supply high-pressure water in either a state in which the airtight cover 30 is closed and the outlet valve 50 is open or the outlet valve 50 is closed.

The high-pressure water of the high-pressure hose 40 is higher than the internal pressure of the pipe 10, and pushes the pig 90 into the inside of the pipe 10.

Thereafter, in order to quickly launch the pig 90 continuously, while the launched pig 90 is passing through the pipe 10, the outlet valve 50 of the pig launch tube 20 is closed and the sealing cover 30 is closed. ) is opened and an additional input step is performed to add additional pigs (90) to the pig launch tube (20) (step S40).

Injecting another pig (90) into the pig launch tube (20) while it is passing through the pipe (10) without waiting for the launched preceding pig (90) to come out of the outlet (80) means continuously introducing pigs (90). This is to quickly proceed with the cleaning operation, reduce water outage time in the pipe 10 due to the operation, and reduce the amount of water (water) used that is discarded into the outlet 80 due to the cleaning operation.

In the additional injection step, the pig (90) is quickly added even when the water is not completely drained from the pig launch tube (20), but the water can move to the upper side of the pig (90) by the bypass passage (70). The downward input of (90) becomes easier.

That is, referring to FIG. 4, when the sealing cover 30 is opened to insert the additional pig 90, water remains inside the pig launch tube 20 when the preceding pig 90 is launched, so the drain Natural drainage is achieved by opening the valve of the hose 60, or drainage is achieved by operating a drain pump connected to the drain hose 60.

However, since draining through the drain hose 60 takes a certain amount of time, even if the water inside the pig launch tube 20 is not sufficiently discharged by the drain hose 60, the pig may be discharged during water discharge from the drain hose 60. When (90) is pushed into the pig launch tube (20), the remaining water can move to the upper side of the pig (90) through the bypass passage (70), making it easy to insert the pig (90), and the pig launch tube (20) Since the inner diameter is smaller than the outer diameter of the pig 90, the pig 90 is elastically deformed and rubs against the inner surface, so the pig 90 can maintain its lowered position even when submerged in water.

Accordingly, rapid insertion and continuous launch of the Pig 90 can be achieved without having to wait for the water in the Pig Launch Tube 20 to be sufficiently drained, thereby reducing the overall working time and thereby shortening the water outage time in the water pipe 10, etc. can contribute to

Meanwhile, in order to fire additional pigs 90, additional pigs 90 are introduced into the pig launch tube 20, the sealing cover 30 is closed, and the high pressure hose 40 is opened with the outlet valve 50 open. An additional firing step occurs in which the pig 90 is additionally launched into the pipeline 10 by high-pressure fluid supplied from ) (step S50).

The additionally launched pig 90 is washed as it proceeds inside the pipe 10 by being pushed by the water (constant water) of the pipe 10 while maintaining the distance from the preceding pig 90, and when it reaches the discharge port 80, the discharge port ( 80) and is discharged together with water.

In the entire cleaning operation for the pipe 10, 2 to 10 pigs 90 may be continuously introduced depending on the internal contamination state of the pipe 10.

On the other hand, when the length of the pig launch tube 20 is extended so that the internal space is sufficient, it is possible to insert two or more pigs 90 at the same time.

With a plurality of pigs 90 mounted at the same time, when the outlet valve 50 is opened and high-pressure fluid is supplied from the high-pressure hose 40, the plurality of pigs 90 are pushed out and fired continuously into the pipe 10. It comes true.

In addition, in order to adjust the interval at which a plurality of pigs 90 are launched, the supply amount of high-pressure water, which is a high-pressure fluid, is adjusted, or a detection sensor is installed to detect when the pigs 90 are launched one by one, and the signal of the detection sensor is adjusted. By controlling the supply of high-pressure fluid from the high-pressure hose 40 to be intermittent, a plurality of pigs 90 can be launched sequentially with a time difference even if there is no opening or closing operation of the sealing cover 30.

Although the preferred embodiment of the present invention has been described above, the above embodiment is only an example within the scope of the technical idea of the present invention, and a person skilled in the art will Of course, other modified implementations are possible.

10; Conduit 11; water valve
12; water valve 20; Fig Launch Center
30; Sealing cover 40; high pressure hose
42; high pressure pump 45; water tank
50; outlet valve 60; drain hose
70; Bypass Euro 71; lower port
72; upper port 73; Shutoff valve
80; outlet 90; pig

Claims (6)

In a pipe cleaning device for continuously firing pigs into a cleaning target section of a pipe extending in the horizontal direction through which water flows,
A pig launch tube installed at one end of the cleaning target section in a vertical direction in a shape in which the pipe is branched, the inside of which is in communication with the inside of the pipe,
A sealing cover installed on the pig launch tube that can be opened and closed to introduce pigs into the pig launch tube;
A high-pressure hose connected to the pig launch tube and supplying high-pressure fluid to the inside of the pig launch tube to push the pig into the pipe,
It includes an outlet valve installed at the lower part of the pig launch tube to block and communicate with the inside of the pig launch tube and the inside of the pipe to enable injection and launch of pigs into the pig launch tube,
A drain hose that discharges water inside the pig launch tube is connected to the pig launch tube for injection of the pig,
The inner diameter of the pig launch tube is smaller than the outer diameter of the pig, so that the pig can be injected into the pig launch tube by elastic deformation,
A bypass passage connecting the lower port and the upper port of the pig launch tube and having a blocking valve in the middle is installed, so that when the pig is introduced into the pig launch tube and moves downward between the lower port and the upper port, the lower side of the pig Pig continuous firing pipe cleaning device, characterized in that water can move to the upper side of the pig. delete delete According to paragraph 1,
The shutoff valve is a check valve that only allows water to move from the lower port to the upper port. A pig continuous firing type pipe cleaning device. delete In the pig continuous firing type pipe cleaning method in which the pipe cleaning device according to paragraph 1 is installed and the pipe is cleaned,
An input step of opening the sealing cover while the outlet valve is closed and introducing the pig into the pig launch tube;
A firing step in which a pig is launched into the pipe by high-pressure fluid supplied from the high-pressure hose while the airtight cover is closed and the outlet valve is open;
Close the outlet valve and open the sealing cover to add an additional pig to the pig launch tube. The pig is introduced in a state in which a predetermined amount of water is discharged through the drain hose, and the water flows into the bypass by the pig that descends upon injection. An additional input step to move to the upper side of the pig through the flow path;
An additional firing step in which pigs are additionally fired into the pipeline by high-pressure fluid supplied from the high-pressure hose while the sealing cover is closed and the outlet valve is open. A pig continuous firing type pipeline cleaning method comprising a.

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