JP2008174954A - Method for cleaning inside of drain pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for cleaning the inside of a drain pipe which enables the inside of the drain pipe to be surely cleaned in a short period of time even if many residues with great specific gravity such as egg shells and sea shells accumulated in the drain pipe are left. <P>SOLUTION: Air with a predetermined flow velocity is circulated in the horizontally-arranged drain pipe 2 in the direction of a cleaning opening for discharging the residues in the drain pipe which is provided in the drain pipe; water is fed into the drain pipe so that a water mass 9 can be generated in the drain pipe on the basis of the water; the inside of the drain pipe is partially closed with the water mass so that the circulation of the air circulated through the drain pipe can be blocked; the water mass is moved in the direction of the cleaning opening where atmospheric air becomes low while the atmospheric air in the drain pipe before and behind the water mass is changed to a high or low level; and the water mass makes the residues in the drain pipe removed by flowing in the direction of the cleaning opening. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for cleaning the inside of a drain pipe disposed in a lateral direction. More specifically, the present invention relates to an interior suitable for a drain pipe in which residues such as eggshells and shells pulverized by a sink disposer are deposited. The present invention relates to a cleaning method.

  Conventionally, when cleaning the drainage horizontal pipe that flows the sink drainage to the drainage main pipe arranged in the vertical direction of the building and the drainage horizontal main pipe connected to the lower end of this drainage main pipe, Insert a hose with a nozzle at the tip that can spray high-pressure water backward from the cleaning port to discharge the residue in the drain pipe provided in one or more places in the pipe, and discharge the high-pressure water radially from the nozzle. In addition, the hose is moved forward and backward toward the cleaning port to discharge the residue, and the deposits adhering to the inner wall of the drain pipe and the deposits deposited in the drain pipe are washed, The washed dirt is washed away by a high-pressure water sprayed from a nozzle toward a cleaning port for discharging the residue, and suctioned and removed from the cleaning port with a vacuum suction machine or the like (for example, see Patent Document 1). .

  However, if the deposit is heavy, such as eggshells and shells crushed by the sink disposer, the direction of the cleaning port for discharging the residue with high-pressure water sprayed from the nozzle is low However, if heavy residues such as eggshells and shells gather gradually as they are swept away and gather until they form a mountain in the drain, they can no longer be swept away by high-pressure water jets. .

In this way, when residues such as eggshells and shells with heavy specific gravity gather and become mountains, the flow of high-pressure water sprayed from the nozzle does not reach the cleaning port, so eggshells and shells with heavy specific gravity in the drain pipe It can be seen that there was a mountain where the residues of the mine gathered.
Therefore, in such a case, while the high pressure water was jetted from the nozzle, the hose provided with the nozzle at the tip was operated so that the nozzle moved forward and backward around the top of the mountain, and residues such as eggshells and shells gathered. The residue must be swept away from the top of the residue pile into the cleaning port in small portions.

Moreover, since the high-pressure water sprayed from the nozzles is sprayed radially backwards, it is extremely difficult to pinpoint this high-pressure water to the top of the mountain, and the pile of the residue formed by the accumulation of accumulated residue is difficult. To break down, the hose must be operated many times so that the nozzle moves back and forth around the top of the mountain.
Therefore, when there are many accumulation residues in a drain pipe, the skill and the work which requires a lot of time and labor were required.

JP 2004-267900 A (pages 1 to 10, FIGS. 1 to 10)

  The present invention can provide an internal cleaning method for a drain pipe that can reliably clean the inside of the drain pipe in a short time even if there are many residues with heavy specific gravity such as eggshells and shells deposited in the drain pipe. I made it.

  In order to solve the above-described problem, a drain pipe internal cleaning method according to the present invention is a drain pipe internal cleaning method arranged in a lateral direction, and a drain provided in the drain pipe in the drain pipe. Air of a predetermined flow velocity is circulated in the direction of the cleaning port for discharging the residue in the pipe, and water is sent into the drain pipe to generate a water mass in the drain pipe, and the water mass is drained by this water mass. Blocking a part of the pipe and blocking the flow of air flowing through the drainage pipe, moving the water mass toward the cleaning port where the atmospheric pressure is low while changing the pressure inside the drain pipe before and after the water mass to high and low The water mass is used to remove the residue in the drain pipe by flowing in the direction of the cleaning port.

  In addition, the air in the drain pipe is sucked from the cleaning port, and an airflow flowing in the direction of the cleaning port is generated in the drain pipe.

  Further, when a plurality of the cleaning ports are arranged in the drain pipe, air of a predetermined flow velocity is blown from another cleaning port toward the discharge cleaning port for discharging the residue in the drain pipe. It is intended to be distributed.

  Further, a water supply hose is inserted into the drainage pipe from the cleaning port, and the water in the drainage pipe is rippled by the water flow supplied from the water supply hose, and this wave grows into the water mass.

  In addition, the water supply hose is inserted in advance from the cleaning port to a desired position in the drain pipe, and then the water supply hose is pulled toward the cleaning port while water is supplied from the water supply hose in the direction opposite to the insertion direction.

  Further, when a plurality of the cleaning ports are provided in the drain pipe, from a water supply hose inserted into the drain pipe from another cleaning port toward the discharge cleaning port for discharging the residue in the drain pipe. The water in the drain pipe is made to wave by the water flow to be sent out, and this wave grows into the water mass.

  Further, the water supply hose is inserted into the drain pipe from the other cleaning port, and then the water supply hose is pushed in the direction of the other cleaning port while water is supplied from the water supply hose in the insertion direction.

  Further, a water supply hose is inserted into the drain pipe from the discharge cleaning port, and then the water supply hose is drawn toward the discharge cleaning port while supplying water from the water supply hose in the direction opposite to the insertion direction.

  Further, an injection nozzle capable of injecting water radially is provided at the tip of the water supply hose.

  The water in the drain pipe is made to wave by the circulating air, and this wave grows into the water mass.

  Further, the drain pipe is internally cleaned with a predetermined flow velocity of air in the direction of the cleaning port for discharging the residue in the drain pipe provided in the drain pipe. In addition to circulating, a water mass is generated in the drainage pipe based on the water sent to the drainage pipe, and a part of the drainage pipe is blocked by this water mass to block the flow of air flowing in the drainage pipe. In addition to moving the water mass in the direction of the cleaning port where the atmospheric pressure is low while changing the air pressure in the drain pipe before and after the water mass to high and low, the turbulent water flow generated at the rear of the water mass due to the movement of the water mass This residue is taken up into a turbulent water stream that moves together with the water mass, and flows in the direction of the cleaning port to be removed.

  According to the internal cleaning method for a drain pipe of the present invention, by moving a water mass at a high speed into the drain pipe, the residue accumulated in the drain pipe due to the turbulent water flow generated at the full inner diameter of the rear of the water mass is removed from the bottom of the drain pipe. Compared with the conventional method in which the residue accumulated in the drain pipe is separated by a part of the high pressure water directed radially from the nozzle toward the bottom of the high pressure water pipe, the present invention is separated. In this method, since the residue in the drain pipe is peeled off by a very large force such as turbulent water flow, the residue can be easily and reliably removed from the bottom of the drain pipe even if the residue is an egg shell or a shell having a high specific gravity.

In addition, the residue peeled off from the bottom of the drainage pipe by the turbulent water flow that occurs across the inner diameter of the pipe at the rear of the water mass is provided in the drainage pipe by the turbulent water flow that is taken into the turbulent water flow and moves so as to be pulled by the water mass. It is conveyed in the direction of the cleaning port that discharges the remaining residue.
Therefore, as compared with the conventional case where a portion of the high-pressure water jetted radially from the nozzle is directed downwards by a portion of the high-pressure water, it is swept away by several tens of centimeters at a time. The transport of the residue can be continued until the water mass moving at high speed in the drain pipe is reduced and the turbulent water flow disappears, and the transport distance can be as long as several meters.

Therefore, the time for conveying the residue to the cleaning port is shortened, and the inside of the drain pipe can be cleaned in a short time.
In order to complete the cleaning of the drain pipe, it is sufficient to visually detect when the residue is no longer conveyed to the cleaning port.In the case of a meter, the vibration interval of the pressure gauge inserted in the drain pipe is sufficient. The completion of the cleaning can be known by the lengthening.
That is, in the past, the completion of the cleaning was determined depending on the operator's sense, but in the method of the present invention, the completion of the cleaning can be known when the residue in the drain pipe is removed, and the residue is removed. In spite of this, there is no waste of continuing the cleaning operation and no residue is left behind, so that an efficient cleaning operation can be performed.

  Conventionally, if the high-pressure water jetted from the nozzles collects heavy eggshells, shells, and other residues that are swept away in the direction of the cleaning port, creating a mountain in the drain pipe greatly improves the efficiency of the cleaning operation. In contrast to the conventional method, the method of the present invention creates a mountain in the drain pipe, so that the water sent into the drain pipe undulates upward by the mountain, and this wave flows in the drain pipe. Since it grows into a water mass by the air current, washing with the water mass is performed efficiently so that a pile of sediment is formed in the drain pipe.

The equipment used in this cleaning method can also use a high-pressure washing machine that can inject high-pressure water from a conventional nozzle, and vacuum suction is used to generate airflow in the drainage pipe and remove residues from the drainage pipe. Since these machines can be small and light-sized equipment for small scales, they are easy to work with and can be easily transported. Since it does not have to be taken widely and the transport time of the residue to the cleaning port can be shortened, the amount of water used for cleaning can be reduced as compared with the conventional method, and the cost for cleaning the inside of the drain pipe can be greatly reduced. .
In addition, according to the method of the present invention, tap water can be used for cleaning the inside of the drain pipe without adding a cleaning agent, etc., so that drainage is not contaminated with chemicals such as detergents, which contributes to environmental protection. it can.

Hereinafter, a method for internally cleaning a drain pipe according to the present invention will be described with reference to the accompanying drawings.
In the accompanying drawings, FIG. 1 shows the case where the drain pipe internal cleaning method of the present invention is used for internal cleaning of a drainage horizontal pipe 2 for flowing the drainage of the sink to the drainage vertical main pipe 1 arranged in the vertical direction of the building. Moreover, FIGS. 2-4 is an Example at the time of using for the internal washing | cleaning of the drainage horizontal main pipe 12 connected to the lower end part of the drainage vertical main pipe 1. FIG.

  As shown in FIG. 1, when cleaning the inside of the drainage horizontal pipe 2 connected to the drainage main pipe 1 that is disposed through each floor of a building such as an apartment, the drainage upstream side of the drainage horizontal pipe 2 Open the lid (not shown) of the cleaning port 3 provided in the vicinity of the disposer (not shown) of the sink to be used for airflow generation and residue suction removal from the cleaning port 3 into the drainage horizontal pipe 2 The suction hose 4 of the vacuum suction machine (not shown) is inserted, the water supply hose 5 of the high-pressure washing machine (illustration omitted) for cleaning the inside of the pipe and water mass is inserted, and the tip of the water supply hose 5 is vertically drained. Insert to the position near the connecting part of the main pipe 1.

  Thus, when the suction hose 4 and the water supply hose 5 are set in the drainage horizontal pipe 2, the vacuum suction machine is activated to generate the air flow 4a in the direction of the arrow in the drainage horizontal pipe 2, and the high pressure washer is activated. The spray nozzle 6 provided at the tip of the water supply hose 5 is an insertion port of the water supply hose 5 as appropriate while the cleaning water 7 is sprayed radially backward from the spray nozzle 6 provided at the tip of the water supply hose 5 and the water supply hose 5 is moved forward and backward. It draws in the direction of the cleaning port 3 to generate a water flow 7a in the direction of the arrow in the drainage horizontal pipe 2.

Further, the forward and backward movement of the water supply hose 5 is repeated, and the injection nozzle 6 also moves forward and backward. The dirt adhering to the inner wall of the drainage horizontal pipe 2 is appropriately cleaned by the cleaning water 7 injected from the injection nozzle 6, and the drainage Deposits such as eggshells and shells deposited on the horizontal tube 2 are also transported toward the cleaning port 3. The detailed movement of the washing water 7 inside the drainage horizontal pipe 2 will be described later with reference to FIG.
And the residue in the drainage horizontal pipe 2 washed by the method of the present invention and transported to the cleaning port 3 is sucked and removed together with water and air for washing by the suction hose 4 of the vacuum suction machine.

  As shown in FIGS. 2 to 4, when cleaning the inside of the drainage horizontal main pipe 12 connected to the lower end portion of the drainage vertical main pipe 1, a plurality of cleaning ports arranged in the drainage horizontal main pipe 12 are used. Open the lids (not shown) of the cleaning ports 3 and 3a in two places, and use a blower (not shown) and a vacuum suction machine (not shown) as appropriate according to the air flow generation mode. A blower hose 13 (not shown), a suction hose 4 of a vacuum suction machine (not shown), and a water supply hose 5 of a high-pressure washing machine (not shown) are inserted into the drainage horizontal main pipe 12 through the cleaning ports 3 and 3a. Wash.

  In the embodiment shown in FIG. 2, the drainage horizontal main pipe 12 is connected to a suction hose 4 of a vacuum suction machine (not shown) for removing a residue and aspirating air from a cleaning port 3 provided in the drainage horizontal main pipe 12. In addition, a blower hose 13 of a blower for generating an air current (not shown) is inserted from the cleaning port 3a, and water is supplied from a cleaning port 3a to a high-pressure washer (not shown) for cleaning the pipe and generating water masses. The hose 5 is inserted and the tip of the water supply hose 5 is positioned near the lower part of the cleaning port 3a.

  Thus, when the suction hose 4, the blower hose 13, and the water supply hose 5 are set in the drainage horizontal main pipe 12, the blower and the vacuum suction machine are activated to generate the airflow 4a in the direction of the arrow in the drainage horizontal main pipe 12, The high-pressure washing machine is activated and the washing water 7 is sprayed radially forward from the jet nozzle 6 provided at the tip of the water supply hose 5 and the suction nozzle 6 provided at the tip of the water supply hose 5 is appropriately suctioned while moving the water supply hose 5 forward and backward. 4 is moved in the direction of the cleaning port 3, which is the insertion port 4, and a water flow 7 a in the direction of the arrow is generated in the drainage horizontal main pipe 12.

Further, the forward and backward movement of the water supply hose 5 is repeated, so that the spray nozzle 6 also moves forward and backward. The dirt adhering to the inner wall of the drainage horizontal main pipe 12 is appropriately cleaned by the cleaning water 7 sprayed from the spray nozzle 6, and the drainage Deposits such as eggshells and shells deposited on the horizontal main pipe 12 are also transported in the direction of the cleaning port 3. The detailed movement of the washing water 7 inside the drainage horizontal main pipe 12 will also be described later with reference to FIG.
The residue in the drainage horizontal main pipe 12 that has been washed by the method of the present invention and transported to the cleaning port 3 is sucked and removed together with water and air for washing by the suction hose 4 of the vacuum suction machine.

  In the embodiment shown in FIG. 3, a plurality of drainage horizontal main pipes 12 are provided with, for example, a suction hose 4 of a vacuum suction machine (not shown) for sucking and removing residues and aspirating air from the cleaning port 3. 12 and the water supply hose 5 of the high-pressure washing machine (illustration omitted) for cleaning the inside of the pipe and generating water mass is inserted from the cleaning port 3, and the tip of the water supply hose 5 is positioned near the lower portion of the cleaning port 3a, Further, a blower hose 13 of a blower (not shown) for generating an air current is inserted from the cleaning port 3a. In the case of this embodiment, the airflow passed through the drainage horizontal main pipe 12 is mainly air blown into the drainage horizontal main pipe 12 from the blower hose 13.

  Thus, when the suction hose 4, the blower hose 13, and the water supply hose 5 are set in the drainage horizontal main pipe 12, the blower and the vacuum suction machine are activated to generate the airflow 4a in the direction of the arrow in the drainage horizontal main pipe 12, The high-pressure washing machine is activated and the washing water 7 is sprayed radially backward from the jet nozzle 6 at the tip of the water supply hose 5, and the water jet hose 5 at the tip of the water feed hose 5 is appropriately moved while moving the water supply hose 5 back and forth. 5 is drawn in the direction of the cleaning port 3, which is the insertion port 5, and a water flow 7 a in the direction of the arrow is generated in the drainage horizontal main pipe 12.

Further, the forward and backward movement of the water supply hose 5 is repeated, so that the spray nozzle 6 also moves forward and backward. The dirt adhering to the inner wall of the drainage horizontal main pipe 12 is appropriately cleaned by the cleaning water 7 sprayed from the spray nozzle 6, and the drainage Deposits such as eggshells and shells deposited on the horizontal main pipe 12 are also transported in the direction of the cleaning port 3. The detailed movement of the washing water 7 inside the drainage horizontal main pipe 12 will be described later with reference to FIG. 5. In this embodiment, the water mass 9 generated in the drainage horizontal main pipe 12 is discharged from the blower hose 13 to the side of the drainage. It is boosted by the pressure of the air blown into the main pipe 12 and proceeds.
The residue in the drainage horizontal main pipe 12 that has been washed by the method of the present invention and transported to the cleaning port 3 is sucked and removed together with water and air for washing by the suction hose 4 of the vacuum suction machine.

  In the embodiment shown in FIG. 4, the drainage horizontal main pipe 12 is provided with a suction hose 4 of a vacuum suction machine (not shown) for removing and sucking residues and generating air currents from a plurality of cleaning horizontal pipes 12, for example. In addition, a water supply hose 5 of a high pressure washer (not shown) for cleaning the inside of the pipe and generating water mass is inserted from the cleaning port 3a, and the tip of the water supply hose 5 is positioned near the lower portion of the cleaning port 3a.

  Thus, when the suction hose 4 and the water supply hose 5 are set in the drainage horizontal main pipe 12, the vacuum suction machine is activated to generate the air flow 4a in the direction of the arrow in the drainage horizontal main pipe 12, and the high pressure washer is activated. Then, the cleaning water 7 is sprayed radially forward from the spray nozzle 6 at the tip of the water supply hose 5 and the spray nozzle 6 at the tip of the water supply hose 5 is an insertion port of the suction hose 4 appropriately while moving the water supply hose 5 forward and backward. It is moved in the direction of the cleaning port 3 to generate a water flow 7a in the direction of the arrow in the drainage horizontal main pipe 12.

Further, the forward and backward movement of the water supply hose 5 is repeated, so that the spray nozzle 6 also moves forward and backward. The dirt adhering to the inner wall of the drainage horizontal main pipe 12 is appropriately cleaned by the cleaning water 7 sprayed from the spray nozzle 6, and the drainage Deposits such as eggshells and shells deposited on the horizontal main pipe 12 are also transported in the direction of the cleaning port 3. The detailed movement of the washing water 7 inside the horizontal drain main pipe 12 will be described later with reference to FIG.
The residue in the drainage horizontal main pipe 12 that has been washed by the method of the present invention and transported to the cleaning port 3 is sucked and removed together with water and air for washing by the suction hose 4 of the vacuum suction machine.

  The airflow 4a flowing through the drainage horizontal pipe 2 and the drainage horizontal main pipe 12 described above requires about 5 m / s to 15 m / s regardless of the size of the pipe diameter, but a suitable flow rate is about 15 m / s. is there. Of course, if there is no possibility of damaging the drain pipe, an air flow of 15 m / s or more may flow.

  Further, the pressure of the airflow 4a flowing through the drainage horizontal pipe 2 and the drainage horizontal main pipe 12, that is, the atmospheric pressure, requires an absolute value of 0.5 kPa to 20 kPa. Of course, if there is no possibility that the drain pipe is damaged, the pressure may be 20 kPa or more.

  The amount of water 7a required for cleaning in the drainage horizontal pipe 2 and the drainage horizontal main pipe 12 may be about 15 to 1/2 of the cross-sectional area in the pipe, but the appropriate amount is about 1/10. Is good.

  Next, detailed movement of the washing water 7 in the drainage horizontal pipe 2 and the drainage horizontal main pipe 12 will be described with reference to FIG. In FIG. 5, in order to clarify the movement of the washing water 7 in the drain pipe, the water supply hose 5 inserted in the drain pipe is not shown. In FIG. 5, it demonstrates using the drainage horizontal pipe 2 shown in FIG.

  When the cleaning water 7 is sprayed from the spray nozzle 6 at the tip of the water supply hose 5 and a water flow 7a in the direction of the cleaning port 3 (see FIG. 1) is generated, the water surface 7b of the cleaning water 7 is swollen by the water flow 7a, and the water surface 7b 5 is eventually grown into a wave 8 as shown in FIG. 5A, and this wave 8 moves in the direction of the cleaning port 3 (see FIG. 1) together with the water flow 7a.

  As the wave 8 moves by the water flow 7a, it grows into a larger wave 8 as shown in FIG. 5 (b) and is cleaned by being pushed by the air flow 4a flowing in the drainage horizontal pipe 2 together with the water flow 7a. It moves in the direction of the mouth 3 (see FIG. 1).

  Then, the wave 8 moves in the direction of the cleaning port 3 (see FIG. 1) by the water flow 7a and the air flow 4a, and further grows into a larger wave 8, and eventually grows into a water mass 9 as shown in FIG. 5C. To do.

  When the waves 8 grow into the water mass 9 in this way, the inside of the drainage horizontal pipe 2 is blocked by the water mass 9, the flow of the air flow 4 a is blocked, and the front of the water mass 9 advances from the water mass 9 as a boundary. That is, the air pressure in the direction of the cleaning port 3 (see FIG. 1) becomes low (low air pressure) due to the suction of air in the drainage horizontal pipe 2 by a vacuum suction device (not shown), and the water mass 9 has a low air pressure. It moves so as to be sucked in the direction of the cleaning port 3 (see FIG. 1).

  Then, the water mass 9 is accelerated to approach the flow velocity of the sucked air. The speed at which the water mass 9 moves in the drainage horizontal pipe 2 is determined when the airflow velocity in the drainage horizontal pipe 2 is set to 10 m / s in experiments conducted under various conditions described later. Accelerates to 5 m / s and moves in the drainage horizontal pipe 2, and the moving distance until the water mass 9 disappears is about 15 m. Therefore, the residue 11 in the drainage horizontal pipe 2 also becomes the water mass 9. Will be transported until it disappears.

  The experiment was performed by arranging a pipe having an inner diameter of 70 mm in a plane U shape and flowing air of 10 m / s into the pipe. In this case, the airflow pressure in the pipe was 3 kPa when there was no load (no water mass 9), and 19 kPa (absolute value) when there was a load (with water mass 9).

  Further, as shown in FIG. 5 (d), a turbulent water flow 10 is generated at the rear part of the accelerated water mass 9, and the turbulent water flow 10 is analyzed by analyzing the video taken by the high speed camera. The water 7 located on the inner peripheral wall side of the drainage horizontal pipe 2 moves so as to sequentially flow toward the rear center of the water mass 9, and the water 7 at the rear of the water mass 9 rotates in the vertical direction of the inner wall of the drainage horizontal pipe 2. However, it moved to follow the water mass 9.

  Therefore, as shown in FIG. 5 (e), the turbulent water flow 10 generated at the rear of the water body 9 rolls up the heavy residue 11 such as eggshell and shells accumulated in the drainage horizontal pipe 2 and winds up this. The residue 11 is taken into the turbulent water flow 10 and the cleaning port 3 (see FIG. 1) is obtained together with the water mass 9 that has been propelled by suction of air in the drainage horizontal pipe 2 by a vacuum suction device (not shown). Flow in the direction.

  Then, the movement of the washing water 7 shown in FIGS. 5 (a) to 5 (e) is repeated in the drainage horizontal pipe 2, and dirt adhered to the inner wall of the drainage horizontal pipe 2 or eggshell deposited in the drainage horizontal pipe 2 Residue 11 having a high specific gravity, such as shells or shells, is transported toward the cleaning port 3.

  Further, the water mass 9 in FIG. 5 is generated by the water flow 7a in the drainage horizontal pipe 2, but the water mass 9 may be generated by the airflow 4a passing through the drainage horizontal pipe 2. In the case where the water mass 9 is generated by the air flow 4 a, the water surface 7 a in the cleaning water 7 easily grows into the water mass 9 when the amount of the cleaning water 7 in the drainage horizontal pipe 2 is increased to some extent.

  In the case of the embodiment shown in FIG. 3 described above, since the air flow 4a is generated in the drainage horizontal main pipe 12 by the air blown into the drainage horizontal main pipe 12 from the blower hose 13, the water generated in the drainage horizontal pipe 2 is generated. When the inside of the drainage horizontal pipe 2 is blocked by the lump 9 and the flow of the air flow 4a is interrupted, the drainage in the forward direction where the water lump 9 advances, that is, in the direction of the cleaning port 3 (see FIG. 1). Since the air pressure in the drainage horizontal pipe 2 on the side of the cleaning port 3a into which the blower hose 13 of the blower (not shown) is inserted becomes higher than the pressure in the horizontal pipe 2, the water mass 9 is blown from the blower. The air is moved in the direction of the cleaning port 3 (see FIG. 1) by the air (high atmospheric pressure).

The figure which shows an example of the washing | cleaning operation embodiment in the drainage horizontal pipe by the method of this invention. The figure which shows an example of the washing | cleaning operation embodiment in the drainage horizontal main pipe by this invention method. The figure which shows another example of washing | cleaning operation embodiment in a drainage horizontal main pipe. The figure which shows another example of the washing | cleaning operation embodiment in a waste_water | drain main pipe. The figure which shows the motion of the washing water in a drain pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drainage main pipe 2 Drainage horizontal pipe 3 Cleaning port 3a Cleaning port 4 Suction hose 4a Air flow 5 Water supply hose 6 Injection nozzle 7 Washing water 7a Water flow 7b Water surface 8 Wave 9 Water mass 10 Turbulent flow 11 Residue 12 Drainage horizontal main tube 13 Blower hose

Claims (11)

  An internal cleaning method for a drain pipe arranged in a horizontal direction, wherein air having a predetermined flow velocity is circulated in the drain pipe in the direction of a cleaning port for discharging a residue in the drain pipe provided in the drain pipe. In addition, water is fed into the drainage pipe, and a water mass is generated in the drainage pipe based on this water, and a part of the drainage pipe is blocked by this water mass to block the flow of air flowing through the drainage pipe, While changing the air pressure in the drain pipe before and after the mass to high and low, the water mass is moved in the direction of the cleaning port where the air pressure becomes low, and the water mass removes the residue in the drain pipe by flowing in the direction of the cleaning port. Internal cleaning method for drain pipes.   The method for cleaning the inside of a drain pipe according to claim 1, wherein air in the drain pipe is sucked from the cleaning port, and an airflow flowing in the direction of the cleaning port is generated in the drain pipe.   When a plurality of the cleaning ports are provided in the drain pipe, the air is blown and distributed at a predetermined flow rate from the other cleaning ports toward the discharge cleaning port for discharging the residue in the drain pipe. The drain pipe internal cleaning method according to claim 1.   The method for internally cleaning a drain pipe according to claim 1, wherein a water supply hose is inserted into the drain pipe from the cleaning port, the water in the drain pipe is rippled by a water stream fed from the water feed hose, and the wave is grown into the water mass. .   The water supply hose is inserted in advance from the cleaning port to a desired position in the drain pipe, and then the water supply hose is drawn in the direction of the cleaning port while supplying water from the water supply hose in the direction opposite to the insertion direction. Internal cleaning method for drain pipes.   When a plurality of the cleaning ports are arranged in the drain pipe, it is sent from a water supply hose inserted into the drain pipe from another cleaning port toward the discharge cleaning port for discharging the residue in the drain pipe. The method for cleaning the inside of a drain pipe according to claim 1, wherein water in the drain pipe is waved by a flowing water, and the wave is grown on the water mass.   The internal cleaning method for a drain pipe according to claim 6, wherein a water hose is inserted into the drain pipe from the other cleaning port, and then the water hose is pushed in the direction of the other cleaning port while feeding water in the insertion direction from the water hose. .   The drainage pipe according to claim 6, wherein a water supply hose is inserted into the drainage pipe from the discharge cleaning port, and then the water supply hose is drawn in the direction of the drainage cleaning port while feeding water in the direction opposite to the insertion direction. Internal cleaning method.   The drain pipe internal cleaning method according to any one of claims 5, 7, and 8, wherein a spray nozzle capable of spraying water radially is provided at a tip of the water supply hose.   The method for cleaning the inside of a drain pipe according to claim 1, wherein water in the drain pipe is waved by the circulating air, and the wave is grown on the water mass.   An internal cleaning method for a drain pipe arranged in a horizontal direction, wherein air having a predetermined flow velocity is circulated in the drain pipe in the direction of a cleaning port for discharging a residue in the drain pipe provided in the drain pipe. In addition, a water mass is generated in the drainage pipe based on the water sent into the drainage pipe, and a part of the drainage pipe is blocked by this water mass to block the flow of air flowing through the drainage pipe, While changing the air pressure in the drain pipe before and after the mass to high and low, the water mass is moved in the direction of the cleaning port where the atmospheric pressure is low, and the residual water in the drain pipe is caused by the turbulent water flow generated at the rear of the water mass due to the movement of the water mass. A method for cleaning the inside of a drain pipe that winds up an object and takes the residue into a turbulent water stream that moves together with a water mass and flows it in the direction of the cleaning port.

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