JP2001300458A - Pipe cleaning device and cleaning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe cleaning device which does not cause cleaning irregularities and an shorten the cleaning time and further, can easily clean even a pipe whose diameter exceeds 1 meter. SOLUTION: This pipe cleaning device 10 comprises a high pressure fluid supply source 11, a hose rotating unit 12 which receives the high pressure fluid from the supply source 11 and imparts a rotation to a high pressure hose 14 centered around central axis 14a, a hose feed device 13 which moves the high pressure hose 14 forward/backward in its axial direction, a nozzle 15 fitted to the tip of the high pressure hose 14 and a first opening 15a/a second opening 15b with a different diameter from each other, formed on the right/left sides in the direction where the nozzle 15 advances. The nozzle 15 leans to one of the sides of the pipe because of the diametral difference of the first and the second opening 15a and 15b by jetting a high pressure water from the first opening 15a and the second operation 15b simultaneously. Thus the inner wall to which the nozzle 15 gets close is cleaned. Since the high pressure hose 14 rotates, moving forward/backward, the nozzle 15 moves spirally through the pipe and cleans the entire inner wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cleaning apparatus and a cleaning method for cleaning the inner walls of pipes such as oil feed pipes, water supply pipes, sewer pipes, and chimneys.

[0002]

2. Description of the Related Art Generally, in order to clean the inner walls of pipes such as oil supply pipes and water supply pipes, high-pressure water is jetted from a jet nozzle to remove rust and sludge deposited on the pipe inner wall by the jet pressure. A method of removal is taken.

As a jet nozzle, four to six branch pipes extend radially from the tip of a central pipe connected to a hose, and an opening is provided at the tip of each branch pipe. By injecting high-pressure water from the nozzle by inclining the branch pipe slightly backwards like an umbrella bone, washing the pipe wall and applying the force to advance the nozzle at the same time, moving the pipe lightly in the pipeline Can be.

[0004]

However, in the above method, since the nozzle is moved manually by an operator, it is difficult to keep the feeding speed constant because of the presence of a worker and therefore, uneven cleaning. It is easy to make it, and it takes a long cleaning time to prevent uneven cleaning. Further, in the above-mentioned nozzle, a pipe diameter of about 20 cm is a limit, and when the pipe diameter becomes larger, the jet nozzle has to be handled completely by hand.

The present invention has been conceived based on the above-described facts, and does not cause uneven cleaning, can reduce the cleaning time, and can reduce
It is an object of the present invention to provide a tube cleaning apparatus and a cleaning method which can easily clean even a pipe having a diameter larger than the above.

[0006]

In order to achieve the above object, a tube cleaning apparatus according to the present invention comprises a high pressure fluid supply source and a high pressure hose which receives the high pressure fluid from the supply source and discharges the high pressure fluid. A hose rotation unit that provides rotation around the central axis of the high-pressure hose, a hose feeder that supports the rotating high-pressure hose and moves the high-pressure hose back and forth in the axial direction, a nozzle provided at the tip of the high-pressure hose,
It is characterized by having a first opening and a second opening having different diameters formed on both left and right sides in the direction of movement of the nozzle.

The hose feeder has a feed wheel capable of changing an angle at which the high pressure hose comes into contact with the rotation of the high pressure hose. The high pressure hose is moved forward or backward by changing an angle at which the feed wheel contacts the high pressure hose. Configuration.

Further, in the pipe cleaning method of the present invention, the high pressure hose is rotated about its central axis in the pipe and moved forward and backward in the central axis direction. High-pressure fluid is ejected from the first opening and the second opening having different diameters, the nozzle is brought close to one of the inner walls in the pipe by a difference in the ejection pressure, and the high-pressure hose rotates around the central axis, and By moving in the direction of the central axis, the nozzle spirally moves on the inner wall of the pipe while maintaining the state close to one inner wall, and cleans the inner wall of the pipe with the injected high-pressure fluid.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the overall configuration of the tube cleaning device of the present invention. The tube cleaning device 10 of the present invention includes a high-pressure fluid supply source 11, a hose rotation unit 12, a hose feeding device 13, a high-pressure hose 14, and a nozzle 15 attached to the tip thereof. The distal end of the high-pressure hose 14 enters the pipe 20.

As the high-pressure fluid supply source 11, a high-pressure washing vehicle is used. This high-pressure washing vehicle has a capability of discharging high-pressure water of about 100 MPa at about 120 to 180 l / min.

The hose rotation unit 12 receives high-pressure water from the high-pressure fluid supply source 11 through the connection hose 16 and supplies the high-pressure water to the high-pressure hose 14, but at the same time, rotates the high-pressure hose 14 around its central axis 14a by a known configuration. Is to give. The hose rotating unit 12 has wheels 12a, and can move in the direction of the arrow as the high-pressure hose 14 moves in and out of the pipe 20. In addition, it is desirable to lay rails in order to facilitate the retreat.
Furthermore, when the high-pressure hose 14 retreats in the pipe 20, which is mainly when the high-pressure hose 14 comes out after the cleaning of the pipe wall, a winch 17 is added as necessary to accelerate the retreat movement. ing.

FIG. 2 is a perspective view showing a main part of the hose feeding device 13. The hose feeder 13 is provided with two rubber support wheels 13a and 13b and one feed wheel 13c, and a rotating high-pressure hose 14 is inserted between them. Each wheel is supported by a frame (not shown) of the hose feeder 13.

All three wheels 13a, 13b, 13c are in contact with the high-pressure hose 14 at an appropriate pressure. Among them, the lower two support wheels 13a and 13b have a rotating shaft whose central axis is that of the high-pressure hose 14. 14a, which supports the high-pressure hose 14 from below.
Between the two wheels and is stably held. on the other hand,
The upper feed wheel 13c comes into oblique contact with the high-pressure hose 14. In addition, this feed wheel 13c
13d is rotatable, and the feed wheel 13c is moved from a position where the contact angle α becomes an acute angle as shown in FIG.
An appropriate contact angle can be set between a position where the contact angle α shown in FIG. 3B becomes an obtuse angle.

If the feed wheel 13c has an angle α <9 shown in FIG.
When the high pressure hose 14 contacts the high pressure hose 14 at an angle of 0 °, the high pressure hose 14 moves from left to right in the figure. Feed wheel 1
When 3c contacts the high-pressure hose 14 at an angle of α> 90 ° shown in FIG. 3B, the high-pressure hose 14 moves in reverse from right to left in the figure. That is, the high pressure hose 14
By simply changing the contact angle α of the feed wheel 13c with the high-pressure hose 14 without changing the rotation direction of the high-pressure hose 14, the high-pressure hose 14 can be sent to the right or left. Also, by increasing or decreasing the contact angle α, the speed of forward / backward movement can be increased / decreased.

FIG. 4 is a perspective view of the nozzle 15. The nozzle 15 is connected to a tip of the high-pressure hose 14. There are a first opening 15a and a second opening 15b having different diameters on both left and right sides of the nozzle 15 in the advancing / retreating direction.
5a and the second opening 15b are connected to the central axis 15c of the nozzle 15.
. Nozzle center axis 15
c is on the extension of the central axis 14a of the high pressure hose 14.
The first and second openings are formed at both ends of one nozzle tip, and the nozzle tip is of a replaceable type that is detachable from the nozzle 15. Since the nozzle tip is straight, the first opening 15a and the second opening 15b are positioned just 180 ° apart from each other on the opposite side of the nozzle 15.

FIG. 5 is a view showing a state in which high-pressure water is jetted from the nozzle 15 in the pipe 20. The high-pressure water supplied from the high-pressure hose 14 is simultaneously sprayed as indicated by A and B from both the first opening 15a and the second opening 15b provided in opposite directions. Then, the first opening 15 of the nozzle 15
a and the diameter of the second opening 15b are larger in the second opening 15b, so that the water A, which is jetted from the two openings,
B has a different amount of water, and the second opening 15b having a larger diameter ejects a larger amount of water than the first opening. Since the nozzle 15 is attached only to the tip of the high-pressure hose 14 and is not fixed, the nozzle 15 is positioned at a position shown in FIG.
Move to a position close to one of the tube walls (the left tube wall in FIG. 5). Then, the inner wall of the pipe 20 is cleaned by the injection pressure of the water A injected from the first opening 15a near the pipe wall.

The diameters of the first opening 15a and the second opening 15b are
Since nozzles with different diameters can be used by exchanging the nozzle tips, prepare nozzle tips with various combinations of opening diameters. Is selected and attached.

As described above, since the high-pressure hose 14 rotates around its central axis, the nozzle 15 also rotates. Then, the jet direction of the high-pressure water also changes, so that the nozzle 15 rotates along the circle 18 close to the inner wall of the pipe 20. Since the rotation is added to the advance by the hose feeder 13, the nozzle 15 eventually cleans the inner wall of the pipe while spirally moving inside the pipe 20 as shown in FIG.

Accordingly, by appropriately setting the rotation speed of the high-pressure hose 14 and the feed speed of the hose feeder 13, the inner wall of the pipe can be cleaned without causing uneven cleaning.

In FIG. 1, as the nozzle 15 spirals into the pipe 20, the hose rotating unit 12 also advances toward the pipe 20 together with the high-pressure hose 14. On the other hand, the hose feeding device 13 is in a fixed state. Therefore, the hose rotating unit 12 is connected to the hose feeding device 13.
The cleaning is stopped once and the high pressure hose 1
4, the hose rotating unit 12 is retracted, and the same washing operation is started again. Nozzle 15 is tube 2
When the zero end is reached, the cleaning operation is completed.

Sludge and rust that have separated from the pipe wall due to washing accumulate at the bottom of the pipe 20.
Is switched to an obtuse angle, and the nozzle is retracted while being spirally rotated. Then, sludge, rust, and the like accumulated at the bottom of the pipe 20 are discharged by the water discharged at this time. In order to smoothly retreat the nozzle 15, the hose rotating unit 12 is pulled out by the winch 17.

In the above embodiment, the first opening 15a
And the second opening 15b are oriented in a direction orthogonal to the central axis 15c of the nozzle 15. With such a configuration, the cleaning power is the strongest. However, a configuration in which the nozzle 15 is slightly inclined backward with respect to the central axis 15c of the nozzle 15 may be employed.

The opening of the nozzle 15 is also the first opening and the second opening.
Although one pair of openings is two, two pairs may form a total of four openings, and a plurality of pairs of openings may be provided. As the numerical aperture increases, the discharge water amount increases accordingly, so that the cleaning speed can be increased. However, the increase in the discharge water amount is limited to a range allowed by the capacity of the high pressure fluid supply source 11. Further, in the above embodiment, water is used as the high-pressure fluid. However, other liquids may be used, or gas such as air may be used.

[0024]

According to the present invention as described above,
A high-pressure fluid supply source, a high-pressure hose that receives the high-pressure fluid from the high-pressure fluid and discharges the high-pressure fluid, and that rotates a high-pressure hose around the central axis of the high-pressure hose; and a high-pressure hose that supports the rotating high-pressure hose. A high-pressure hose, a nozzle provided at the tip of the high-pressure hose, and first and second openings having different diameters formed on both left and right sides in the moving direction of the nozzle. Therefore, when the high-pressure fluid is ejected from the first opening and the second opening at the same time, the nozzle comes close to one inner wall of the tube and cleans the adjacent inner wall with the high-pressure fluid. At the same time, the nozzle spirals in the tube to clean the entire inner wall of the tube. No manpower is required during this cleaning operation.

Further, if the hose feeder has wheels for moving the high-pressure hose forward and backward at an angle in contact with the rotation of the high-pressure hose, the structure of the hose feeder can be simplified.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a tube cleaning device of the present invention.

FIG. 2 is a diagram showing a main configuration of a hose feeder.

FIG. 3 is a diagram illustrating the operation of the hose feeder.

FIG. 4 is a perspective view of a nozzle.

FIG. 5 is a view for explaining a state of jetting a high-pressure fluid by a nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Pipe washing apparatus 11 High pressure fluid supply source 12 Hose rotation unit 13 Hose feeder 14 High pressure hose 14a Central axis of high pressure hose 15 Nozzle 15a First opening 15b Second opening 20 Pipe

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B08B 3/02 E03B 7/09 E03B 7/09 E03F 9/00 E03F 9/00 B08B 9/02 C F term (Reference) 2D063 FA03 FA04 FA16 3B116 AA13 BA35 BB22 BB43 BB47 BB90 3B201 AA13 AB56 BB22 BB43 BB47 BB54 BB90 BB92 CB01 4D075 AA38 4F035 AA03 CE05

Claims (3)

[Claims] 1. A high-pressure fluid supply source (11) and a high-pressure hose (14) receiving the high-pressure fluid from the supply source and discharging the high-pressure fluid from the high-pressure hose (14). 12), a hose feeder (13) for supporting the rotating high-pressure hose and moving the high-pressure hose in the axial direction, a nozzle (15) provided at the tip of the high-pressure hose, and A tube cleaning device having a first opening (15a) and a second opening (15b) having different diameters formed on both sides. 2. The hose feeder (13) has a feed wheel (13c) that can change the angle of contact with the rotation of the high pressure hose, and determines the angle (α) at which the feed wheel contacts the high pressure hose. The tube cleaning device according to claim 1, wherein the high-pressure hose is moved forward or backward by changing. 3. A high-pressure hose (14) is rotated around its central axis in a pipe (20), and is moved forward and backward in the direction of the central axis. A high-pressure fluid is ejected from a first opening (15a) and a second opening (15b) having different diameters formed on both sides, and the nozzle is brought closer to one inner wall in the pipe by a difference in ejection pressure. The nozzle rotates around the central axis and moves in the direction of the central axis so that the nozzle spirally moves on the inner wall of the pipe while maintaining the state close to one inner wall, and cleans the inner wall of the pipe with the injected high-pressure fluid. A tube washing method.