JPH0929193A - Device for cleaning inside of pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the device capable of efficiently and surely cleaning the inner wall of an especially large-diameter pipe and capable of being used for the straight pipe and bent pipe. SOLUTION: At least three expansion legs 33 are radially provided around a central member 12 to form one set, another set is formed, and the two sets are connected with a flexible member. A flexible hihg-pressure hose 27 is inserted into the through-hole 26 of the central member 12, and a nozzle main body 29 is attached to the tip of the hose 27 to constitute the device for cleaning the inside of a pipe. The heights of the legs 33 are adjusted by setting the device to the inner diameter of a pipe 10 to be cleaned. The device is moved in the pipe 10, and a cleaning soln. 36 is jetted against the inner wall of the pipe 10 to wash off sludge 11. The leg 33 tends to return to the normal state at all times even if the leg 33 is inclined, the main body 29 is held almost at the central position in the pipe 10, and the device can be used for the straight pipe and bent pipe.

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 for cleaning the inner wall of a large diameter pipe such as an oil feed pipe, a water supply pipe, a sewer pipe or the like. More specifically, it relates to an in-pipe cleaning device used for scraping and cleaning sludge in oil pipes, sludge such as water pipes, sewer pipes, underdrain pipes, sediment such as earth and sand, pebbles, waste liquids, and organisms. Is.

[0002]

2. Description of the Related Art Generally, in the case of a large-diameter pipe,
Before an operator enters and works for repairing or coating the inner wall, cleaning work such as removal of sludge accumulated inside and removal of combustible gas is performed. For such a purpose, conventionally, the cleaning liquid is jetted while moving the jet nozzle in the oil feed pipe.

Further, in the case of dredging of a water pipe, a hose is fed from a high-pressure washing car on the ground through a manhole, and high-pressure water is jetted from a nozzle while moving a high-pressure jet device at the end of the hose in the water pipe. The sediment in the pipe was stirred and floated, collected under the manhole, and removed by suction with a sludge suction wheel.

[0004]

In the method of injecting the cleaning liquid while moving the jet nozzle in the oil feed pipe, it is troublesome to always keep the jet nozzle in the center position in the oil feed pipe in a large-diameter pipe. In the case of a curved pipe, there is a problem that cleaning is not performed well.

The method of moving the high-pressure injection device in the water pipe is effective with a small diameter, but with a large diameter and a long length, only a small deposit that is light can be agitated only by injecting water. If there is still water remaining in the water pipe, there is a problem that the injection of water from the high-pressure injection device is weakened and sufficient scraping cannot be performed.

The present invention is capable of efficiently and reliably cleaning the inner wall of a large-diameter pipe such as an oil feed pipe, a water supply pipe, a sewer pipe, etc.
The purpose of the present invention is to obtain a pipe cleaning device that can be used even in a curved pipe.

[0007]

The present invention provides a central member 12
At least three telescopic legs 33 are radially provided on the outer periphery of the so that the center angles thereof are substantially equal to each other.
Further, another pair is formed to connect these two pairs with a flexible member, and a flexible high pressure hose 27 is inserted into the through hole 26 of each central member 12, and the high pressure hose 27 In the pipe cleaning apparatus, a nozzle body 29 is attached to a tip portion.

[0008]

The height of the telescopic leg 33 is determined by the insertion position of the positioning pin 17 so that the height is matched with the inner diameter of the large-diameter pipe 10 to be cleaned. This in-pipe cleaning device is put into the pipe to be cleaned 10, and the high-pressure cleaning liquid 36 is fed to the high-pressure hose 27 while being pulled by the pulling rope 35 connected to the rope hooking tool 34 at the tip. The cleaning liquid 36 is supplied to the front injection nozzle 3 of the nozzle body 29.
0, the side jet nozzle 31, and the reverse jet nozzle 32 jet-jet the inner wall of the pipe 10 to be washed to wash away the sludge 11. When the caster 22 rides on the sludge 11, the caster 22 is pushed slightly toward the center against the spring 20 and smoothly moves in the pipe 10 to be cleaned.

The front and rear telescopic legs 33 are connected by a balancing spring 23, and the front and rear central members 12 are connected.
An attitude holding spring 24 is interposed between the attitude holding tube 25 and the attitude holding tube 25.
Is loosely fitted, even if the front or rear telescopic legs 33 are tilted when the curved pipe portion is moved or the casters 22 hit the sludge 11,
Always tries to return to normal. Therefore, the nozzle body 29 is held at a substantially central position in the tube to be cleaned 10, and the inside of the tube to be cleaned 10 is cleaned substantially all around.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 12 is a central member having a through hole 26 formed at the center of the hexagonal columnar body. 1 is provided on the outer peripheral portion of the central member 12.
Telescopic legs 33 are provided at intervals of 20 degrees. This telescopic leg 33 will be described in detail.
A support frame 18 having a U-shaped cross section is fixed to one side surface, and a guide rod 13 is fixedly attached vertically to the central portion of the support frame 18. Two links 19 are rotatably attached to both side plate portions of the support frame 18 by connecting pins 21.

Reference numeral 14 is a caster base having a U-shaped cross section. A caster 22 is attached to the upper surface of the caster base 14, and a fitting cylinder 15 into which the guide rod 13 is fitted is fixedly mounted on the lower surface. Is attached to. Two links 19 are provided on each side plate portion of the caster base 14.
Is rotatably attached by a connecting pin 21, and the link 19 and the link 19 on the side of the support frame 18 are rotatably connected by a connecting pin 21 in a panda-graph shape.

The fitting cylinder 15 is formed with elongated holes 16 orthogonal to the length direction at predetermined intervals, and the positioning pin 17 is inserted through the guide rod 13 from the elongated hole 16 at an appropriate position. The height of the telescopic leg 33 can be adjusted. A spring 20 is interposed between the left and right sides of the center of the Pandagraph to constantly urge the caster 22 outward. However, when the caster 22 is pushed inward, the long hole 1
Within the allowable range of 6, the spring 20 extends and the height of the caster 22 becomes slightly lower, so that the sludge 11 can cope with the change in the inner diameter of the pipe 10 to be cleaned.

The telescopic leg 33 constructed as described above is
One set is radially attached to the outer periphery of the central member 12 at intervals of a central angle of 120 degrees. Then, another pair is formed to form the through holes 26 of the respective center members 12.
A flexible high pressure hose 27 is inserted into the. At this time,
An attitude holding spring 24 that biases slightly outward is fitted between the two central members 12, and an attitude holding tube 25 made of a hard pipe is fitted without being fixed.
In addition, the spring 23 is provided between the two sets of the telescopic legs 33.
Are intervening and pulling each other. However, since the pulling forces of the three springs 23 are balanced so as to be slightly larger than the force urging the posture maintaining springs 24 to the outside, both ends of the posture maintaining tube 25 are located on the side surface of the central member 12. Touches.

A nozzle body 29 is attached to the tip of the high pressure hose 27 via a hose stopper 28 in a fixed screw type. A front jet nozzle 30, a side jet nozzle 31, and a reverse jet nozzle 32 are attached to the nozzle body 29. These front jet nozzle 30, side jet nozzle 31, and reverse jet nozzle 32 are
It may be attached with the ejection direction fixed, or may be rotated by water pressure or the like. Further, the front jet nozzle 30, the side jet nozzle 31, the reverse jet nozzle 3
2 may have all three, or may have any one or two. A rope hooking device 34 is provided at the tip of the nozzle body 29, and is pulled by a pulling rope 35.

The cleaning action of the pipe 10 to be cleaned by the pipe cleaning device constructed as described above will be described. The to-be-cleaned pipe 10 to be cleaned has a large diameter, for example, 700 mm to 1000 mm or more, and sludge or other sludge 1 is provided on the inner wall.
It is assumed that 1 is attached. The height of the telescopic leg 33 is determined by the insertion position of the positioning pin 17 so that the height matches the inner diameter of the pipe to be cleaned 10.

After adjusting the height, the pipe cleaning device is attached to the pipe 10 to be cleaned.
When put in, telescopic legs 33 are provided at 120 degree intervals,
Since the casters 22 can be moved up and down by the margin of the long hole 16,
It is set in a state of being substantially in contact with the inner wall of the pipe to be cleaned 10.
In this state, the high-pressure hose 27 is pulled while being pulled by the pull rope 35 connected to the rope hook 34 at the tip.
The high-pressure cleaning liquid 36 is sent to.

The cleaning liquid 36 is applied to the front jet nozzle 30, the side jet nozzle 31, and the reverse jet nozzle 3 of the nozzle body 29.
2 to jet-inject the inner wall of the pipe 10 to be cleaned with sludge 11
Wash off. If the cleaning liquid 36 is sprayed only from the backward spray nozzle 32, the cleaning liquid 36 can be automatically advanced without being pulled by the pull rope 35. Also,
When the casters 22 are riding on the sludge 11,
The casters 22 are slightly pushed in the central direction against the spring 20, so that the casters 22 smoothly move in the pipe 10 to be cleaned.

Since the front and rear telescopic legs 33 are connected by the springs 23, the posture holding springs 24 are interposed between the front and rear central members 12, and the posture holding pipes 25 are loosely fitted. As shown in FIG. 3, when the curved pipe portion of the pipe to be cleaned 10 is moved, or even when the caster 22 hits the sludge 11 and the telescopic legs 33 at the front or rear are inclined, the telescopic legs 33 are Always try to return to normal.
Therefore, the nozzle body 29 is always held at a substantially central position in the tube to be cleaned 10, and the inside of the tube to be cleaned 10 is cleaned substantially all around.

When the pipes 10 to be cleaned have different sizes, the positioning pin 17 is pulled out from the elongated hole 16 and the lengths of the guide rod 13 and the fitting cylinder 15 are adjusted to the pipes 10 to be cleaned. Insert the positioning pin 17 into the appropriate long hole 16 and insert the caster 2 from the center of the center member 12.
Adjust the length to the tip of 2. Make adjustments for a total of 6 locations in front and back. In addition, when it is not possible to finely adjust the pre-drilled intervals of the long holes 16, the telescopic legs 33 at three locations are used.
Even if the lengths are not all the same and the lengths at one or two positions are slightly different, the nozzle body 29 is slightly off the center, but there is almost no problem in actual use.

In the above embodiment, the posture holding spring 24 for pushing is interposed between the front and rear telescopic legs 33, and the posture holding tube 25 is loosely fitted, but the present invention is not limited to this. As shown in FIG. 4, a connection spring 37 that does not function as a push-out member or a puller member but may serve only as a bending member may be interposed. However, the spring 23
It should be large enough to withstand the pulling force of.
Further, as shown in FIG. 5, the flexible tubular body 38 may be used as a member that acts only for bending.

In the above embodiment, the front and rear telescopic legs 33 are
Although three pieces are arranged at intervals of 20 degrees, at least three pieces may be arranged and four pieces or more may be arranged.

[0022]

【The invention's effect】

(1) In the present invention, at least three telescopic legs 33 are radially provided on the outer periphery of the caster 22 so that the center angles thereof are substantially equal to each other, and one set is formed. These two sets are connected by a flexible member, a flexible high pressure hose 27 is inserted into the through hole 26 of each central member 12, and a nozzle body 29 is attached to the tip of this high pressure hose 27. Since the nozzle body 29 of the large-diameter pipe 10 to be cleaned can be always held at the center position of the pipe 10 to be cleaned, the cleaning can be performed well not only for straight pipes but also for curved pipes. be able to. (2) Even if the diameter is large and the length is long, it is possible to sufficiently stir and scrape the deposit.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a pipe cleaning apparatus according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a cross-sectional view showing a state in which a curved pipe is washed by the pipe washing apparatus according to the present invention.

FIG. 4 is an explanatory view of a main part showing another embodiment of the present invention in which front and rear expandable legs 33 are connected by a connecting spring 37.

FIG. 5 is an explanatory view of a main part showing still another embodiment of the present invention in which the front and rear stretchable legs 33 are connected by a flexible tubular body 38.

[Explanation of symbols]

10 ... Pipe to be washed, 11 ... Sludge, 12 ... Central member, 13 ...
Guide bar, 14 ... Castor stand, 15 ... Fitting cylinder, 16 ... Long hole 17 ... Positioning pin, 18 ... Support frame, 19 ... Link, 2
0 ... Spring, 21 ... Connection pin, 22 ... Casters, 23 ... Spring, 24 ... Posture holding spring, 25 ... Posture holding tube, 26 ... Through hole, 27 ... High pressure hose, 28 ... Hose stopper, 29 ...
Nozzle body, 30 ... Front jet nozzle, 31 ... Side jet nozzle, 32 ... Reverse jet nozzle, 33 ... Telescopic leg, 34
... rope hanging device, 35 ... pulling rope, 36 ... cleaning liquid, 37 ... connecting spring, 38 ... flexible cylinder.

Claims (4)

[Claims] 1. At least three telescopic legs 33 are radially provided on the outer periphery of the central member 12 so that the central angles thereof are substantially equidistant, and one set is formed, and another set is formed. These two sets are connected with a flexible member, and the flexible high pressure hose 2 is inserted into the through hole 26 of each central member 12.
7 is inserted, and a nozzle main body 29 is attached to the tip of the high-pressure hose 27. 2. A telescopic leg 33 has a support frame 18 fixed to an outer peripheral surface of a central member 12, a guide rod 13 fixedly attached to a central portion of the support frame 18 vertically, and the support frame 18 There are two links 1 on each side plate part of the
9 is rotatably attached by a connecting pin 21, and
The casters 22 are attached to the upper surface of the caster base 14, and the fitting cylinders 15 into which the guide rods 13 are fitted are fixedly attached to the lower surface thereof. Link 19 of each book is connecting pin 21
The pipe cleaning device according to claim 1, wherein the link 19 and the link 19 on the side of the supporting frame 18 are rotatably attached by a connecting pin 21 so as to be rotatable in a pandagraph shape. 3. A nozzle body 29 is attached to the tip of the high-pressure hose 27 via a hose stopper 28. The nozzle body 29 has a front injection nozzle 30, a side injection nozzle 31 or a reverse injection nozzle. 32. The in-pipe cleaning device according to claim 1, wherein 32 is attached. 4. The in-pipe cleaning device according to claim 1, wherein the guide rod 13 and the fitting cylinder 15 are provided so that their lengths can be adjusted.