JPH06328054A - Cleaning of piping inner wall - Google Patents

Abstract

PURPOSE:To provide a method for cleaning a contaminant sticking to the inner wall of a piping efficiently, in which the distance between a nozzle for liquid ejection and the inner wall surface of the piping is kept constant and the liquid is ejected from a close range. CONSTITUTION:This cleaning method of the inner wall of a piping is to clean the inner wall of the piping using a nozzle 2 for cleaning the piping. The nozzle 2 for cleaning the piping is allowed to gyrate along the inner wall surface of the piping, forcing the nozzle 2 for cleaning the piping to come into contact with the inner wall surface of the piping 3 by the injection force of a liquid from the nozzle 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning dirt on an inner wall of a pipe, and more specifically, it can efficiently remove dirt by rotating a nozzle while abutting the inner wall of the pipe. Related to the cleaning method.

[0002]

2. Description of the Related Art Cleaning of drainage pipes in high-rise apartment houses represented by condominiums has hitherto been extremely important not only for the problem of clogging but also for preventing adverse effects on the building due to corrosion of the pipes. . To clean the inside of this pipe, insert a hose or other water-conducting means from the most downstream drainage port, and forcefully jet water from the water discharge means, such as a shower nozzle, provided at the tip, and the jetting force cleans the inner wall surface of the pipe. Generally, the method of rinsing off while knocking off is adopted.

[0003]

However, in such a conventional cleaning method, since the position of the shower nozzle is naturally located at the lowest portion in a pipe installed horizontally, the side surface of the pipe or In the vicinity of the upper surface, the distance from the shower nozzle becomes large, resulting in a problem that a sufficient cleaning effect cannot be obtained. In addition, the position of the shower nozzle is not constant in the pipe installed in the vertical direction, and the part far from the shower nozzle and the part close to the shower nozzle are irregularly generated, and a sufficient cleaning effect is obtained over the entire inner wall surface of the pipe. The problem is that it cannot be obtained.

[0004]

SUMMARY OF THE INVENTION The gist of the present invention, which has been made for the purpose of solving the above-mentioned conventional problems, is a method for cleaning an inner wall of a pipe using a nozzle for cleaning a pipe. The method for cleaning an inner wall of a pipe is characterized in that the pipe cleaning nozzle is swung along the inner wall of the pipe while being in contact with the inner wall of the pipe by the jetting force of the fluid. It is proposed to use liquid or gas as the fluid.

[0005]

In the cleaning method of the present invention, for example, as a nozzle, a fluid is jetted in a specific direction, the nozzle is brought into contact with the inner wall surface of the pipe by the jetting force from one direction, and the inner wall surface of the pipe is jetted by the jetting force from another direction. This can be achieved by swirling the nozzle along the line and knocking off the dirt. Further, in such a cleaning method, the distance between the nozzle and the inner wall surface of the pipe is constant, and the fluid is ejected from a close range.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the details of the present invention will be described in detail with reference to the drawings. FIG. 1 schematically shows the movement of the nozzle in the cleaning method of the present invention. In the example shown in the figure, a pipe cleaning nozzle 2 is attached to the tip of a hose 1 made of a flexible material, and the movement of the nozzle 2 when the inner wall surface of the pipe 3 is cleaned by supplying water as a fluid is schematically shown. It is a thing.
Here, the water pressure of the supply water is 80 to 250 kg / c
m ² , the outer diameter of the rotating body 8 is 8 to 25 mm, and the inner diameter of the pipe is preferably 25 to 200 mm. As can be seen from the figure, the jetting force of water swirls along the inner wall surface of the pipe and moves forward to remove dirt. Although this drawing shows the pipe 3 installed horizontally, it goes without saying that it is also applicable when installed vertically. In this case, the nozzle 2 can be raised in the pipe by the jetting force of water. According to such a cleaning method, not only the distance from the nozzle 2 to the inner wall surface of the pipe is always constant, but also the fluid can be jetted from a short distance, so that an extremely high cleaning power can be obtained. . The nozzle structure that enables such movement is described below.

FIG. 2 is an exploded view showing the structure of the pipe cleaning nozzle 2 that can be used in the cleaning method of the present invention. Reference numeral 4 in the drawing denotes a pipe body having a discharge hole 6 formed in a side wall 5, and in the illustrated example, a screw hole 8 into which a closing screw 7 can be screwed is formed on an inner wall surface on one end side. On the other hand, on the other end side, a straight body portion 9 is formed by increasing its diameter so that a hose or the like can be connected. The rotating body 10 is fitted onto the tubular body 4, and the disc fitting 11 is provided to prevent the rotating body 10 from falling off.
And the screw 7 is screwed into the screw hole 8 at the tip of the tube body 4 via the spring washer 12 to close one end side of the tube body 4, thereby rotating the rotating body 10 with respect to the tube body 4. I put it on in such a state. Further, the rotating body 10 is provided with the first injection port 13 and the second injection port 14, and the positional relationship between these injection ports is shown in FIG. 3 below.

Next, FIG. 3 illustrates the structure of the nozzle 2 shown in FIG. 2 in an easy-to-understand manner with reference to a side sectional view (a), a front view (b) and a rear view (c). First, in the side sectional view (a), reference numeral 4 denotes a tubular body, and 10 denotes a rotating body fitted to the tubular body 4, respectively. As described above, the rotary body can be rotated by the screw 7 via the disc fitting 11 and the spring washer 12. It is installed. The other end of the pipe body 4 has a diameter increased to form a straight body part 9 so that a hose or the like can be connected thereto, and a thread 15 is engraved inside the straight body part 9 to serve as a fluid supply port 16. The discharge holes 6 are communicated with each other. An annular groove 17 having a trapezoidal cross section is provided inside the rotating body 10 and at a position facing the discharge hole 6. From the side surface of the annular groove 17, the central axis of the penetration is relative to the central axis of the tubular body 4. The first injection port 13 that penetrates the rotating body 10 in a non-parallel manner is provided. The annular groove 17 is shown here as a trapezoidal shape, but the shape is not limited to this example, and other shapes such as a V-shaped cross section are also possible. And, as shown in the front view of FIG.
In this embodiment, two positions are provided at positions symmetrical with respect to the rotation center of the rotating body 10 and in a direction not intersecting with the rotation center of the rotating body 10. This first jet 1
By the jetting force of the fluid jetted from 3, 13, the dirt on the inner wall surface of the pipe is knocked off as described later.

A second injection port 14 is provided from the bottom surface of the annular groove 17 so that its central axis of penetration penetrates the rotary body 10 substantially perpendicularly to the central axis of the tubular body 4. Like the first injection ports 13 and 13, the second injection port 14 is also provided in a direction that does not intersect the rotation center of the rotating body 10 as shown in the front view of FIG. This second
Of the fluid ejected from the ejection port 14 of the
By the action of the projection 18 provided on the outer peripheral portion of the nozzle, the nozzle 2 swirls in the inner wall surface of the pipe while being in contact with the inner wall surface of the pipe as described later.

This fluid can be used either as a gas or a liquid, and as shown in the rear view of FIG.
A hose nipple or the like can be screwed onto the thread 15 provided on the inner surface, and a hose or the like can be attached to this for supply.

Next, the manner in which the nozzle 2 turns while contacting the inner wall surface of the pipe by the jetting force of the fluid will be described. FIG. 4 shows the positional relationship between the nozzle 2 and the pipe at the time of cleaning, that is, at the time of ejecting the fluid. In the figure, 3 indicates a pipe, and the inside diameter of the pipe 3 and the diameter of the nozzle 2 are selected within the above-mentioned range. In the figure, the rotating body 10 tries to rotate in the direction of the arrow 20 due to the ejection force of the fluid from the second injection port 14, but the protrusion 18 abuts the inner wall surface of the pipe 3 as shown in the figure, so the rotating body A propulsive force in the turning direction indicated by an arrow 21 along the inner wall surface of the pipe 3 is applied to the pipe 10, so that the rotating body 10 does not rotate on the spot and the pipe 3 is rotated.
It turns along the inner wall of the. At this time, since the tube body 4 itself does not make a rotational motion, the fluid supply means such as a hose connected to the tube body 4 is not twisted as the nozzle 2 rotates.

As shown in FIG. 3A, since the first injection port 13 is not parallel to the central axis of the tube body 4 and penetrates toward the other end side of the tube body 4. By the jetting force of the fluid from the first jet port 13, the dirt adhering to the inner wall surface of the pipe 3 is knocked off, and at the same time, the dropped dirt is washed away behind the nozzle 2 and the nozzle 2 itself is moved forward. It is driven in the direction. On the other hand, on the contrary, when the first injection port 13 is penetrated toward the one end side of the pipe body 4, the nozzle 2 moves in the backward direction. As described above, the pipe cleaning nozzle of the present invention is provided with the two injection ports 13 and 14 having different functions, as shown in FIG.
As shown in Fig. 5, the inner wall surface of the pipe is swiveled to move forward and backward.

Further, the structure shown in FIG. 5 below is proposed as a structure capable of further enhancing the cleaning effect than the above-mentioned structure. FIG. 5 shows such a structure of the second embodiment as a side sectional view thereof, and a front view and a rear view thereof are the same as FIGS. In the figure, reference numeral 4 denotes a tubular body having a discharge hole 6 formed in the side wall 5, and 10 denotes a rotating body fitted to the tubular body 4, respectively. As described above, by means of the screw 7 through the disc metal fitting 11 and the spring washer 12. It is rotatably mounted. And the rotating body 1
A first annular groove 30 having a trapezoidal cross section is provided inside 0 and at a position facing the discharge hole 6, while the other end of the tube body 4 is provided outside the rotating body 10 with respect to the first annular groove 30. A second annular groove 31 having a V-shaped cross section is provided on the side so as to be adjacent to the first annular groove 30. And the first annular groove 30
The first injection port 13 is formed by penetrating between the side wall of the second annular groove 31 and the side wall of the second annular groove 31 in the direction in which the central axis of penetration is not parallel to the central axis of the tubular body 4. This first jet 1
Although not shown here, 3 is a point-symmetrical position with respect to the rotation center of the rotating body 10 as in the front view of FIG. It is provided. By providing the two annular grooves 30 and 31 in this way, the length of the through passage forming the first injection port 13 becomes shorter and the pressure loss of the fluid in the through passage becomes smaller, resulting in a higher cleaning effect. Is obtained.

Further, in the present embodiment, the second annular groove 31 is provided at a position adjacent to the first annular groove 30 on the other end side of the pipe body 4. It is also possible to appropriately select the provision of the second annular groove 31 at the adjacent position on one end side of the body 4 or the provision of the two second annular grooves 31 at both adjacent positions. Further, the cross-sectional shape of the first and second annular grooves 30 and 31 may be trapezoidal, V-shaped, or other various shapes.

From the bottom surface of the first annular groove 30, the central axis of the penetration is substantially perpendicular to the central axis of the tubular body 4, and the rotary body 1 is provided.
A second injection port 14 passing through 0 is provided. As with the first injection port 13, the second injection port 14 also has
As shown in the front view of FIG. 2B, it is provided in a direction that does not intersect the rotation center of the rotating body 10. Needless to say, the function of the second injection port 14 is the same as that of the first embodiment, and therefore the duplicated description here is omitted.

In addition to these, as the third and fourth embodiments, the structures shown in FIGS. 6 and 7 are proposed. FIG. 6 is different from the above-mentioned two examples in that the outer shape of the rotating body 10 is elliptical in order to have a structure in which no protrusion is provided on the outer peripheral portion of the rotating body 10. Since the annular groove in the outer peripheral portion of the rotating body 10 is the same as in the above two examples, only the front view will be described here. 13 and 14 are the first and
It is a second injection port and is penetrated in a direction that does not intersect the rotation center of the rotating body 10. With such a structure, the tip of the ellipse in the long axis direction has the above-mentioned protrusion 18
The nozzle 2 can be swirled with the same function as the above.

A structure having the structure shown in FIG. 7 is also proposed as a fourth embodiment. In the example shown in the drawing, in the outer peripheral portion of the rotating body 10 having an elliptical cross section shown as the third embodiment, a saw-toothed concavo-convex section 32 is provided in the vicinity of the contact portion with the inner wall surface of the pipe. . With this structure,
It is possible to scrape off the adhered portion that is difficult to be removed only by the ejection force of the fluid. Furthermore, by making the tip of the unevenness 32 sharp, it is possible to cut the roots of plants that often enter the pipe when buried in the ground. The cutting of the root can be more effectively performed by providing the rotating body 10 with a quadrangular outer shape and providing the cutting blades 33 at the corners of the quadrangle in a sectional view, as shown in FIG. 8 below. That is, as shown in FIG.
There is proposed a structure in which the outer shape of the rotating body 10 is quadrangular so as to prevent the rotating body 10 itself from swinging in the rotating direction at the time of turning, and a cutting blade 33 is provided at a corner portion in the front in the traveling direction at the time of turning. Then, it is effective to incline the cutting blade 33 with respect to the turning direction shown by the arrow 22, as shown in FIG.

It goes without saying that the cutting blade 33 can be applied not only to the rotating body having a quadrangular outer shape, but also to the above-mentioned elliptical or circular one. Further, instead of the cutting blade 33 or together with the cutting blade 33, it is also effective to implant synthetic fibers, natural fibers, glass fibers or the like at appropriate places on the outer peripheral portion of the rotating body to form a brush structure. For example, as shown in FIG. 9, in the rotating body 10 having a quadrangular sectional view shown in FIG. 8, the protrusions 34, 3 are provided at the corner portions that come into contact with the inner wall of the pipe.
It is also a consideration to provide the No. 4 and to implant the synthetic fibers 35 having excellent abrasion resistance therebetween. In consideration of durability and replacement of the brush, the pedestal is planted on an appropriate pedestal and the brush is attached to the rotator 1.
Attaching to 0 is also effective. And, of course, it is also possible to install the above-mentioned cutting blade on the front part in the traveling direction at the time of turning. Further, this brush structure is also applicable to the above-mentioned elliptical or circular rotating body. Furthermore, for a nozzle having such a rotating body 10, a nozzle having a simpler structure and a cleaning method using the same are also proposed, and the details thereof will be described below.

FIG. 10 shows an example of a nozzle 40 that does not use a rotating body, as a side sectional view (a) and a front view (b) thereof. In the example shown in the drawing, one end is closed, and a tubular body 42 having an integral structure in which a protrusion 41 is provided on an outer peripheral portion penetrates the tubular body 42 with its penetration center axis non-parallel to the central axis of the tube body 42. A first injection port 43 and a second injection port 44 whose penetrating central axis penetrates the pipe body 42 substantially perpendicularly to the central axis of the pipe body 42 are provided, and the other end is a fluid supply port 45. It was done. In the present embodiment, the first and second injection ports 43 and 44 are also provided at the center of the pipe body 42 as shown in the front view of FIG. Two points are provided at positions symmetrical with respect to each other and in a direction that does not intersect the center of the tubular body 42.

However, when the cleaning method of the present invention is performed using the nozzle having such a structure, there is a problem that the fluid supply means such as the hose is twisted by the turning of the nozzle 40. Can be solved by the method.

FIG. 11 shows a connection form of the hose to the nozzle when such a nozzle 40 is used.
In the example shown in the drawing, the nozzle 40 has a first hose 46 at the front stage.
And a first hose 46 and a second hose 47 to which a fluid is supplied are connected by a joint 48. The joint 48 allows the first and second hoses 46 and 47 to rotate relative to each other while allowing fluid to flow therethrough, and thus even if the first hose 46 rotates as the nozzle 40 swivels, the second hose 46 does not rotate. 47 is not twisted.

It is needless to say that the nozzle 40 as described above can also be combined with an elliptic tubular structure, a cutting blade, or a brush, as in the case of having the rotating body 10.

[0023]

As described above, in the method of cleaning the inner wall of the pipe according to the present invention, the nozzle is swirled while being in contact with the inner wall of the pipe. Therefore, the fluid is jetted over the entire inner wall of the pipe from a close distance. Therefore, it is possible to realize pipe cleaning that has an extremely high cleaning effect that has never been achieved. The nozzle that enables this cleaning method also has a very simple structure consisting of a tubular body and a rotating body that is externally fitted to this tubular body, so that not only is the manufacturing cost low, but it is also under severe operating conditions. Also, there is no fear of failure, and the durability will be excellent. Furthermore, since the nozzle itself can be moved forward and backward along with the cleaning by the jetting force of the fluid, it suffices to supply the fluid at an appropriate pressure, and it is not necessary to separately feed or pull out the hose. Further, since the nozzle can be advanced along the inner wall surface of the pipe, it is possible to easily enter a branched pipe such as a T-shape.

On the other hand, it is also possible to provide a brush structure by providing a flocked portion, provide irregularities on saw teeth, or use a nozzle equipped with a cutting blade. The roots of plants that have invaded can be easily removed. As described above, the cleaning method of the present invention solves all the conventional problems in pipe cleaning and renews the common sense of piping maintenance.

[Brief description of drawings]

FIG. 1 is an explanatory view schematically showing the movement of a nozzle and the connection form of a hose in a cleaning method of the present invention.

FIG. 2 is an exploded explanatory view showing an embodiment of a pipe cleaning nozzle capable of realizing the cleaning method of the present invention.

3A and 3B are structural explanatory views showing an embodiment of a pipe cleaning nozzle capable of realizing the cleaning method of the present invention, in which (A) is a side sectional view, (B) is a front view, and (C) is a rear view.

FIG. 4 is an explanatory diagram showing a positional relationship between nozzles and pipes during cleaning.

FIG. 5 is a structural explanatory view showing an embodiment of a nozzle for cleaning a pipe capable of realizing the cleaning method of the present invention as a side section.

FIG. 6 is an explanatory diagram showing, as a front view, an embodiment of a pipe cleaning nozzle that can realize the cleaning method of the present invention.

FIG. 7 is an explanatory view showing, as a front view, an embodiment of a pipe cleaning nozzle that can realize the cleaning method of the present invention.

FIG. 8 is a structural explanatory view showing a case where a cutting blade is attached in an embodiment of a nozzle for cleaning a pipe capable of realizing the cleaning method of the present invention, (a) is a front view, and (b) is a side view.

FIG. 9 is an explanatory view showing, as a front view, a case where a flocked portion is provided in an embodiment of a nozzle for cleaning a pipe capable of realizing the cleaning method of the present invention.

FIG. 10 is a structural explanatory view showing an embodiment of a pipe cleaning nozzle capable of realizing the cleaning method of the present invention, in which (a) is a side sectional view and (b) is a front view.

FIG. 11 is an explanatory view showing another hose connection form in the cleaning method of the present invention.

[Explanation of symbols]

1 Hose 2, 40 Nozzle 3 Piping 4, 42 Tubular Body 5 Side Wall 6 Discharge Hole 7 Screw 8 Screw Hole 9 Straight Body 10 Rotating Body 11 Disc Metal Fitting 12 Spring Washer 13, 43 First Injection Port 14, 44 Second Injection port 15 Screw thread 16, 45 Fluid supply port 17 Annular groove 18, 41 Protrusions 20, 21 Directional arrow 30 First annular aperture 31 Second annular aperture 32 Serrated irregularity 33 Cutting blade 34 Corner protrusion 35 Synthetic Fiber 46 First Hose 47 Second Hose 48 Joint

Claims (3)

[Claims] 1. A method for cleaning an inner wall of a pipe using a nozzle for cleaning the pipe, wherein the nozzle for cleaning the pipe is brought into contact with the inner wall of the pipe by the jetting force of fluid from the nozzle for cleaning the pipe, A method for cleaning an inner wall of a pipe, characterized by swirling. 2. A method for cleaning an inner wall of a pipe according to claim 1, wherein a liquid is used as the fluid according to claim 1. 3. The method for cleaning an inner wall of a pipe according to claim 1, wherein a gas is used as the fluid according to claim 1.