JP2002086096A - Apparatus for cleaning inside of pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly practical and well workable apparatus for cleaning the inside of a pipe which satisfactorily removes dust such as rust or fat and oil from the inside of a pipe and does not yet cause the pitting and piercing of the pipe even when it has a thin wall or a rusted area. SOLUTION: This apparatus consists of a guide 2 that is capable of being freely inserted into a pipe 1 and is provided with a rotary drive 3 at its front end, a rotating body 5 attached to a drive shaft 4 having an axis A extending along the longitudinal direction of the pipe 1 provided with the drive 3, a rotary shaft 6 having an axis B parallel with the shaft 4 and attached to a position eccentric from the axis 4 for the body 5, and a strike rotating body 7 that is attached to the body 5 in a freely swingable manner and impulsively strikes the inside 1a of the pipe 1 by being projected beyond the external periphery of the body 5 when the body 5 is rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe inner surface cleaning apparatus for cleaning dusts such as rust and oils and fats adhering to existing pipes such as drain pipes and gas pipes.

[0002]

2. Description of the Related Art There is a case where rust is generated, dusts such as oils and fats are adhered to the inner surface of an existing pipe which has been used for a predetermined period of time, and a corroded portion due to such rust is present. Conventionally, it is necessary to clean the inside of the pipe, and conventionally, the inner surface of the pipe is mainly cleaned by shot blast. In this method, abrasive is blown off from the tip of a nozzle inserted into a pipe by a high-speed air flow, and dust such as rust and oils and fats is removed by the impact to clean the inner surface of the pipe.

[0003]

According to the conventional pipe inner surface cleaning apparatus described above, a polishing agent such as iron powder, silica sand, ceramics or the like having a high polishing efficiency is used as the polishing agent. The abrasive can be blown off and applied almost perpendicularly to the inner wall of the pipe, and the abrasive can collide with rust etc. to remove dust such as rust and oils and fats, and clean the inner surface of the pipe. Very simple,
There is an advantage that the polishing effect is also excellent, but there is a risk that a relatively advanced corroded portion is cut too much and a hole is opened,
If the abrasive is concentrated on a thin walled tube,
There is a risk that holes will be opened due to excessive shaving of the tube wall. When a hole is formed in the pipe wall, the cleaning operation is interrupted, and extra work for repairing the hole is required, so that the workability is poor. In addition, it is necessary to perform troublesome work to remove and collect the ejected abrasive from the inside of the pipe, and there is a face that solidified oils and fats are difficult to remove unexpectedly, and there is room for improvement in that the application conditions are limited. Was left.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to easily penetrate even a corroded portion or a thin-walled tube while being excellent in the action of cleaning dust such as rust and oils and fats on the inner surface of the tube. It is an object of the present invention to provide a tube inner surface cleaning device which is practical and excellent in workability, and has no holes.

[0005]

[Structure] As shown in FIGS. 1 and 2, a rotation driving device 3 is provided at the tip of a guide 2 which can be inserted into a tube 1. A rotating body 5 is attached to a driving shaft 4 having an axis A along the longitudinal direction Y of the tube 1 provided in the rotary driving device 3, and the eccentricity of the rotating body 5 is different from that of the rotating axis A. A rotary shaft 6 having an axis B parallel to the drive shaft 4 is provided at the position where the rotary shaft 5 is driven. The rotary shaft 5 protrudes from the outer peripheral surface of the rotary member 5 and strikes the inner surface 1a of the pipe by the rotational drive. The impact rotating body 7 is mounted on the rotating shaft 6 so as to swing freely.

As shown in FIGS. 2 and 3, the rotary driving device 3 is a driving device main body 1.
1, a rotary blade 9 having a plurality of blades 10 is provided around a drive shaft 4, and a jet fluid R sprayed from the nozzle hole 8 is applied to the blade 10 to perform the driving. The shaft 4 is configured to be rotatable for driving.

As shown in FIG. 5, a feature of the invention according to the third aspect of the present invention is to provide a nozzle body 21 which can be inserted into a pipe 1a and a liquid supply means 24 for supplying a fluid to the nozzle body 21. A fluid helical flow jetting mechanism 20 for helically circulating the jetting fluid R from 21 along the inner surface of the pipe 1 is provided.

As shown in FIG. 5, a feature of the invention according to claim 4 is that the fluid helical flow injection mechanism 20 is configured as follows.
A guide blade 23 for spirally guiding the fluid ejected from the nozzle hole 22 of the nozzle body 21 is provided on the nozzle body 21.

A feature of the invention according to claim 5 is that an abrasive can be freely mixed into the fluid.

[0010] As described above, the reference numerals are used for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Operation and Effect] According to the first aspect of the present invention,
A rotation drive device is provided at the tip of a guide that can be inserted into the pipe,
A rotating body is attached to a driving shaft having an axis along the longitudinal direction of the tube provided in the rotary driving device, and is parallel to the driving shaft at an eccentric position different from the rotating axis in the rotating body. A rotating shaft having a shaft center is provided, and a striking rotating body that protrudes from the outer peripheral surface of the rotating body and strikes the inner surface of the pipe by a rotational drive of the rotating body is swingably attached to the rotating shaft. Because of this, it is excellent in removing dust such as rust and oils and fats on the inner surface of the pipe, but does not easily penetrate even a corroded portion or a thin walled pipe. That is,
When the rotating body is rotationally driven by the rotating drive device provided at the tip of the guide, the striking rotating body protrudes from the outer peripheral surface of the rotating body due to the rotational driving of the rotating body, and is formed on the inner surface of the pipe and along the circumferential direction. Dusts such as rust and oils and fats on the inner surface of the tube can be scraped and removed by hitting with impact. At this time, the impact rotating body rotates along the inner surface of the tube while hitting the inner surface of the tube with an impact, and mainly focuses on dusts such as rust and oils and fats with a uniform thickness all around the inner surface of the tube. Because it is possible to scrape and remove, even if it is a corroded part or a thin wall, it is possible to cut it evenly along the inner surface of the pipe, and it is possible that holes will be opened through the pipe wall. Can be prevented. As a result, extra work for repairing the hole formed in the pipe wall as in the conventional example is not required, and the workability of the cleaning work can be improved.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, the rotary drive device has a nozzle hole formed in the drive device body and a drive shaft. Providing a rotating wing with multiple wings around,
Since the drive shaft is configured to be rotatable by applying the jet fluid ejected from the nozzle hole to the blade, the drive shaft can be driven and rotated with a simple structure. In other words, for example, with a rotary drive device that includes a motor and drives the drive shaft so that it can rotate freely by transmitting the rotational power of this motor, an electric wire that transmits power for operating the motor can be extended, Since it is necessary to provide a gear box or the like for transmitting the rotational force from the rotating shaft to the drive shaft after increasing or decreasing the rotational force, the device has a complicated drive mechanism. Although it is easy to cause a problem, in the case of the present case, compared with the above configuration, it does not require complicated mechanisms such as electric wires and gear boxes, and sprayed from the nozzle hole formed in the drive device body The drive shaft can be driven to rotate by applying the jet fluid to a plurality of blades provided around the drive shaft, and the jet speed of the jet fluid ejected from the nozzle hole is controlled by a fluid supply source. By changing in Ku, it is possible to easily change the rotational speed of the drive shaft. As a result, since the driving mechanism can be formed with a simple structure, compared to a motor having a complicated driving mechanism having the above-described motor,
It has become possible to provide a small-sized rotary drive device with few failures.

According to the third aspect of the present invention, a nozzle body which can be inserted into a pipe is provided, and a liquid supply means for supplying a fluid to the nozzle body is provided, and a jet fluid from the nozzle body is supplied along an inner surface of the pipe. It has a helical fluid injection mechanism that spirals and flows in a spiral manner, so it is excellent in cleaning dust such as rust and oils and fats on the inner surface of the pipe, but easily penetrates even corroded parts and thin pipes. No holes are created. That is, by the fluid spiral flow injection mechanism, the injection fluid injected from the nozzle body becomes a spiral swirling flow, and flows in the longitudinal direction of the pipe along the inner surface of the pipe. At this time, dust such as rust and oils and fats on the inner surface of the pipe is scraped and removed by the jet fluid, and flows while washing with a fluid. For example, even a corroded portion or a thin wall of a pipe is cut too much to form a hole. Since it is possible to prevent emptying and to discharge the shaved dust and the like together with the jetting fluid, it is not necessary to perform a complicated operation of removing and collecting the abrasive from the inside of the pipe as in the conventional example. As a result, it has become possible to provide a tube inner surface cleaning apparatus which is excellent in practicality and has good workability.

According to the fourth aspect of the present invention, in addition to the effect of the third aspect of the invention, in order to constitute the fluid helical flow injection mechanism, the fluid helical flow is ejected from the nozzle hole of the nozzle body. Since the guide wings for guiding the fluid fluid spirally are provided on the nozzle body, it is easy to make the jet fluid a spiral swirling flow. That is, for example, when processing the nozzle hole so that the jet fluid ejected from the nozzle hole becomes a spiral swirling flow, it is necessary to secure a long path of the nozzle hole in order to stabilize the directionality of the ejected fluid. In addition, the thickness of the nozzle body limits the length of the nozzle hole, and forming a nozzle hole having an injection angle in the nozzle body is a very difficult operation. However, in the case of the present invention, since the fluid ejected from the nozzle hole can be formed into a spiral swirling flow by the guide blades, the length of the nozzle hole and the injection angle of the nozzle hole are concerned as described above. Instead, the jet fluid can be formed into a spiral swirling flow and flow in the longitudinal direction of the pipe while being along the inner surface of the pipe. As a result, the operation of forming the fluid helical flow jetting mechanism has been facilitated as compared with the configuration in which the nozzle fluid is formed into a spiral swirling flow by processing the nozzle holes.

According to the invention of claim 5, according to claim 3 or 4,
In addition to achieving the function and effect of the invention, the abrasive can be mixed into the fluid, so that the polishing efficiency can be improved. In other words, if the abrasive is mixed into the spiral swirling fluid flowing along the inner surface of the pipe in the longitudinal direction of the pipe, rust, grease, etc. on the inner surface of the pipe will be higher than those in which the abrasive is not mixed into the fluid. It is possible to further improve the polishing action of scraping and removing the dust with a fluid. As a result, the workability of the cleaning operation of the inner surface of the pipe can be further improved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a tube inner surface cleaning device K according to an embodiment of the present invention. The cleaning device K includes an existing pipe 1 which is a pipe to be cleaned.
A guide 2 that can be inserted into the inside, a rotary driving device 3 that can rotate the drive shaft 4, a rotating body 5 that is driven to rotate by rotation of the drive shaft 4, and an outer periphery of the rotating body 5 that is driven to rotate by the rotating body 5. And a striking rotating body 7 that protrudes from the surface.

As shown in FIGS. 2 and 3, the rotary drive device 3 is provided with a metal tube 13 (guide device 2) that also serves as the guide device 2 with respect to a tube mounting portion 12 protruding from one end of a drive device body 11. Is connected and connected by a fitting 14 for external fitting, a nozzle hole 8 communicating with the metal pipe 13 is formed in the driving device main body 11, and the nozzle hole 8 is arranged on an axis A along the longitudinal direction Y of the existing pipe 1. A rotary blade 9 having a plurality of blades 10 is provided around the drive shaft 4 provided, and water vapor (an example of a jet fluid R) jetted from a nozzle hole 8 through a metal pipe 13 is orthogonal to a blade plane. The drive shaft 4 is configured to be rotatable in the direction and by contact with the tip of the wing plane.
In the drawing, reference numeral 17 denotes a discharge hole for discharging water vapor from the inside of the drive device main body 11 after rotating the drive shaft against the blade plane.

The rotating body 5 is, as shown in FIGS.
A drive shaft mounting portion 15 that can be mounted on the drive shaft 4 is mounted and fixed, and a rotation shaft A
A plurality of holes 16 are provided at eccentric positions different from the above, and freely swingable via a rotary shaft 6 of a bolt and nut having an axis B parallel to the drive shaft 4 at an arbitrary position of the plurality of holes 16. The striking rotating body 7 formed by bending a metal plate is mounted so as to be in a retracted posture in the rotation direction of the rotating body 5 rather than in a posture along the radial direction of the rotating body 5.

The cleaning of the inner surface of the tube by the cleaning device K will be described along the procedure. First, metal tube 1
The drive device main body 11 attached to the tip of 3 is positioned by inserting the metal pipe 13 to a location in the existing pipe 1 where cleaning work is required. At this time, a guide mechanism (not shown) guides the drive shaft body A of the drive device main body 11 so that the drive shaft center A substantially coincides with the center of the existing pipe 1. (See FIG. 2) Then, the steam is supplied to the drive unit main body 11 through the metal pipe 13.
The drive shaft 4 is driven and rotated by spraying from a nozzle hole 8 formed on the drive shaft 4 and hitting a plurality of blades 10 provided around the drive shaft 4. (See FIG. 3) With the rotation of the rotating body 5 by the drive rotation of the drive shaft 4, the striking rotating body 7 protrudes from the outer peripheral surface of the rotating body 5 due to centrifugal force and impacts on the inner surface 1a of the pipe. Due to the reaction, the rotor 5 slightly swings toward the center of the rotating body 5, and alternately repeatedly strikes the inner surface 1a of the tube by centrifugal force, thereby rotating along the inner surface 1a of the tube. Dusts such as rust and oils and fats adhering to the existing pipe 1 can be evenly scraped and removed over the entire circumference of the pipe inner face 1a by the impact of the impact on the pipe inner face 1a.
(See FIG. 4) By performing the insertion operation of the metal pipe 13 along the longitudinal direction Y of the existing pipe 1 while maintaining the scraping operation, the cleaning of the existing pipe inner surface 1a in all of the circumferential direction X and the longitudinal direction Y is performed. Can be performed favorably. Another Embodiment Hereinafter, another embodiment will be described. <1> The number of striking rotating bodies attached to the rotating body is not limited to the single one described in the above embodiment, and a plurality of striking rotating bodies may be provided. According to this, the scraping efficiency of dust such as rust and oils and fats on the inner surface of the pipe can be further improved by the number of the impact rotating bodies. <2> The pipe inner surface cleaning device K is not limited to the configuration in which the impact rotating body described in the above embodiment is impacted against the pipe inner surface to scrape dust such as rust and oils and fats. A fluid helical jet is provided in which an insertable nozzle main body 21 is provided and a liquid supply means 24 for supplying a fluid to the nozzle main body 21 is provided, and the jet fluid R from the nozzle main body 21 spirally swirls and flows along the inner surface 1a of the pipe. It may have a mechanism 20. For example, as shown in FIG. 5, a pressurized fluid such as water (an example of the ejection fluid R) is ejected from a plurality of nozzle holes 22 of the nozzle body 21 from a pipe 25 connected to one end of the nozzle body 21, A spiral guide vane 23 (an example of a fluid spiral flow jetting mechanism 20) provided on the main body 21 guides the fluid ejected from the nozzle hole 22 to form a spiral swirling flow, and the existing piping is formed along the pipe inner surface 1a. 1, the towing wire 26 serving also as the guide 2 connected to the other end of the nozzle body 21 while flowing in the longitudinal direction Y.
To move the nozzle body 21 along the longitudinal direction Y of the existing pipe 1. The swirling flow makes it possible to scrape and remove dust such as rust and oils and fats on the inner surface 1a of the pipe, and discharge the scraped rust and oils and fats while washing them. At this time, the higher the fluid temperature, the easier the removal of fats and oils. Furthermore, when the abrasive is mixed in the fluid, the polishing action of scraping and removing dust such as rust and oils and fats on the inner surface of the pipe is further improved as compared with the case where the abrasive is not mixed in the fluid. It can be improved. It should be noted that, in addition to the case where the metal tube 13 also serves as the guide device 2, the case where the guide device 2 does not need to serve as the guide device 2 or the case where the guide device 2 is formed by the towing wire 26, instead of the metal tube 13, Alternatively, the tube 25 may be a flexible hose or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a cleaning device according to the present invention.

FIG. 2 is a longitudinal sectional side view showing an embodiment of the cleaning device according to the present invention.

FIG. 3 is a longitudinal sectional front view showing an embodiment of the rotary drive device according to the present invention.

FIG. 4 is an explanatory view of a cleaning operation in the embodiment of the cleaning device according to the present invention.

FIG. 5 is an explanatory view of a cleaning device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Existing piping 1a Pipe inner surface 2 Guide 3 Rotation drive device 4 Drive shaft 5 Rotation body 6 Rotation shaft 7 Striking rotation body 8 Nozzle hole 9 Rotating blade 10 Blade 11 Drive device main body 20 Fluid spiral flow injection mechanism 21 Nozzle body 22 Nozzle hole 23 Guide wing 24 Liquid supply means A Shaft core B Shaft core R Injected fluid Y Longitudinal direction

Claims (5)

[Claims] 1. A rotary driving device is provided at a distal end of a guide that can be inserted into a pipe, and a rotary body is attached to a driving shaft provided in the rotary driving device and having a shaft center along a longitudinal direction of the pipe. A rotating shaft having an axis parallel to the drive shaft is provided at an eccentric position different from the axis of rotation of the rotating body,
A pipe inner surface cleaning apparatus, wherein a striking rotary member that protrudes from the outer peripheral surface of the rotary member by the rotation drive of the rotary member and impacts against the pipe inner surface is swingably attached to the rotating shaft. 2. The rotary drive device, wherein a nozzle hole is formed in the drive device main body, and a rotary blade having a plurality of blades is provided around a drive shaft, and the jet fluid ejected from the nozzle hole is supplied to the blade. The tube inner surface cleaning apparatus according to claim 1, wherein the drive shaft is configured to be rotatable by contacting the drive shaft. 3. A nozzle body which can be inserted into a pipe and a liquid supply means for supplying a fluid to the nozzle body are provided.
A pipe inner surface cleaning device comprising a fluid helical flow jetting mechanism for helically circulating and flowing the jetting fluid from the nozzle body along the inner surface of the pipe. 4. The fluid helical flow injection mechanism comprises:
The tube inner surface cleaning apparatus according to claim 3, wherein a guide blade that spirally guides the fluid ejected from the nozzle hole of the nozzle body is provided in the nozzle body. 5. The tube inner surface cleaning apparatus according to claim 3, wherein an abrasive is freely mixed into the fluid.