JPH09285749A - Device for cleaning inside of pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for cleaning the inside of a pipe with good cleaning efficiency and cleaning work efficiency in the device for injecting a pressure fluid to clean the inside of a pipe, etc. SOLUTION: A hose for supplying a pressure fluid is connected to a shaft 2, a rotor 1 is freely rotatably fixed to almost the central part of the shaft through a thrust bearing 8, an axial hollow hole 18 and a radial through-hole 19 are bored in the rotor 1, a space 20 is provided at the part of the through- hole 19 between the rotor 1 and shaft 2, a nozzle tip 5 is fixed to the rotor 1, a communicating hole 21 is bored in the rotor 1, the pressure fluid is ejected from the nozzle 5, a nozzle 5 mounting part is rotated, and the device is moved. A rotation control part 3A is fixed to the rotor 1 and rotated along with the rotor 1. A rotation control part 3B is opposed to a rotation control part 3A with a clearance in-between and fixed in a cover without being rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention introduces a high-pressure fluid such as water into a cleaning device equipped with a nozzle and jets it from the nozzle. The jet reaction force is used to propel the device at the same time. The present invention relates to a device for cleaning the inside of a pipe by rotating the attached part.

[0002]

2. Description of the Related Art Conventionally, high pressure water or the like is introduced through a hose into a nozzle for a hose or a burette nozzle attached to the tip of a hose. A plurality of nozzle holes having the same hole diameter are uniformly formed on the entire circumference of the nozzle mounting portion. The jetting direction of the nozzles is arranged so that each jetting fluid radiates from a virtual point on the central axis in the longitudinal direction of the device, so that the jet reaction force is generated only in the direction of the longitudinal central axis, and the other directions. Cancel each other out. Therefore, the cleaning device propels itself in the longitudinal central axis direction while spraying the cleaning water. Rust, water stains, oils, sludge, etc. on water and sewer pipes, transportation pipes, etc.
It becomes possible to remove the deposits deposited in the tube such as root cutting, and it is possible to maintain the processing capacity in the object to be cleaned. Since no metal brush is used, it does not damage the surface to be cleaned and can be used safely with aged pipes.

In a two-dimensional nozzle in which a plurality of nozzle tips having the same hole diameter are attached to the nozzle body, the nozzle has a jetting direction on a plane perpendicular to the central axis of the longitudinal direction of the apparatus and intersects with the central axis. It is arranged so that there is no direction.
Therefore, only the rotation of the nozzle body occurs due to the jet reaction force,
Although cleaning water is sprayed all around the circumference, it does not propel itself, so it is necessary to pull the nozzle body with a hose or rope. In addition, the optimum rotation speed varies depending on the type or situation of the deposits deposited in the pipe, and when the rotation exceeds a certain limit, the sprayed cleaning water is scattered and the cleaning efficiency is extremely reduced. Must be set to a constant value. However, the rotation speed control of the two-dimensional nozzle is a hydraulic control method that uses a trochoid pump to adjust the rotation speed with an oil amount control valve. Furthermore, since the rotation speed is 100 RPM or less, it is necessary to slow down the cleaning speed. . Usually, as shown in FIG. 3, a hose connected to a cleaning device is connected to a high pressure cleaning vehicle equipped with a water tank, a jet pump, an operation panel, and a hydraulically driven hose reel.

[0004]

In cleaning with water using a hose nozzle and a burette nozzle, in order to increase the cleaning efficiency, it is better to install as many nozzle holes as possible so that the density of the cleaning water in the circumferential direction is increased. It is preferable because it becomes high. If the supply pressure is as high as possible, the velocity of the ejected fluid is high and the cleaning efficiency is high. However, there is a limit to the number of nozzles that can be processed and the diameter of the nozzles depending on the size of the outer diameter of the mounting part, and the capacity of the pump is also limited. It was necessary to repeat the work many times. Furthermore, if the roots are in old sewer pipes, etc., removal of the roots is not sufficient,
It was sometimes necessary to use a chain cutter or overhang cutter to remove this. In addition, there is a portion where the cleaning water is not directly sprayed due to the structure, and it is inevitable that a portion that is not sufficiently removed in the longitudinal direction is formed on the inner surface of the object to be cleaned or the pipe. Therefore, uniform cleaning cannot be performed only by passing the cleaning device through the object to be cleaned or the inside of the pipe once or twice.

In cleaning with a two-dimensional nozzle, the apparatus does not self-propel, so the cleaning apparatus needs to be pushed into the object to be cleaned or the inside of the pipe before cleaning. However, since only the hose is connected to the nozzle body, the apparatus is actually used. It is necessary to tie a wire rope etc. to the other opening and pull it to the other opening and place it at a predetermined work start position, then wind up the hose reel and pull in the opposite direction. In addition, since the nozzle tip is structurally attached so as to project locally from the apparatus, a movement guide must be attached in order to smoothly move inside the pipe. For this reason, the entire length of the apparatus becomes long, and it is impossible to clean the bent portion of the pipe having the bent portion and to wash the bent portion through the bent portion. In addition, there are cases in which the rotation speed cannot be increased due to hydraulic control using a trochoid pump, and the rotation speed of the nozzle body fluctuates due to changes in viscosity due to temperature changes in the hydraulic oil, making efficient and stable cleaning impossible. there were.

Further, in the conventional apparatus, the moving direction of the apparatus or the rotating direction of the nozzle body is only one direction, and all nozzles eject, and the relative ejection direction of the nozzles is fixed, so that the cleaning efficiency is high. And there was a limit to the cleaning work efficiency.

The present invention has been made in view of the above problems in the prior art. In order to further enhance the cleaning efficiency, the reaction force of jetting the fluid is used as a rotational force and a longitudinal central axis moving force to mount the nozzle. By rotating the part, it is possible to wash uniformly throughout the circumferential direction, at the same time the device can self-propel in the direction of the longitudinal center axis, or it is possible to control the number of rotations of the nozzle mounting part. It is possible or possible to adjust the control rotation speed of the nozzle mounting portion to an appropriate value, and to provide a rotating and self-propelling cleaning device having a foreign matter entry protection means for the rotating nozzle mounting portion. With the goal.

[0008]

[Means for Solving the Problems] That is, the pipe cleaning apparatus according to claim 1 introduces into the nozzle the nozzle including one or more pairs of nozzles for injecting the pressure fluid, and the pressure fluid supplied from a pressure source. A pipe having a hollow portion, a nozzle mounting portion that is rotatably supported on the shaft, and a cover that accommodates a portion of the shaft and a portion of the nozzle mounting portion therein. A rotation for adjusting the rotational speed of the nozzle mounting portion by arranging the nozzle so as to cause rotation about the central axis in the longitudinal direction of the nozzle mounting portion and self-propelling in the longitudinal central axis direction of the apparatus body by the jet reaction force of A control means is provided inside the cover. Stable rotation about the longitudinal center axis of the nozzle mounting portion and self-propelling in the longitudinal center axis direction of the device can enhance the cleaning efficiency and achieve uniform cleaning. The pipe cleaning device according to claim 2 is the pipe cleaning device according to claim 1, wherein the rotation control means provides a clearance between a magnet mounted inside the cover and a metal member locked to the nozzle mounting portion. Is provided to oppose each other, and the control speed can be adjusted. Uses magnetic field and eddy current to prevent abnormal increase in rotation speed, to prevent splashing of injected cleaning water, etc., and to adjust the rotation speed to the type of cleaning fluid, fluid supply pressure, injection flow rate, etc. It can be set and cleaning efficiency can be improved. According to a third aspect of the present invention, there is provided a pipe cleaning apparatus according to the first or second aspect, further comprising foreign matter intrusion protection means provided on an outer peripheral surface of the metal member. Foreign matter, especially iron powder or the like attracted to the magnet, is prevented from entering the rotating part, and it is possible to use it in a bad environment.

[0009]

FIG. 1 is an assembled cross-sectional view of a cleaning apparatus according to an embodiment of the present invention, particularly for cleaning the inside of a sewer pipe, which is used for cleaning a duct, a pipe inner surface of a large diameter pipe, a side groove and a U-shaped groove. It is possible. Although water is used as the pressure fluid, gas such as air, oil, chemicals, chemicals, etc. may be used as the pressure fluid depending on the intended use. Fluid pressure is 20 to 70 MPa for water
It is necessary to select (200 to 700 kgf / cm ² ) according to the object to be cleaned. In FIG. 1, almost the right half of the shaft 2 is hollow, and the inlet of this hollow hole 18 is threaded. One end of the male and female union adapter 17 is screwed here, and a hose (not shown) for supplying a pressure fluid is screwed to the other end of the male and female union adapter 17. A through hole 19 that communicates with the shaft surface in the radial direction is formed in the back of the hollow hole 18. A hole 21 communicating with the space 20 is formed in the rotor 1 arranged to cover the central portion of the shaft and has a recessed portion in the portion of the through hole 19 on the surface of the shaft. The portion of the communication hole 21 near the rotor surface is threaded, and the nozzle tip 5 is screwed therein. The supplied cleaning water is a hose, male and female union adapter 17, through hole 1
Nozzles 5A, 5B, 5 passing through 9, space 20, communication hole 21
It is injected from C and 5D.

A part of the front view showing the arrangement of the nozzle tip 5 is shown in FIG. The number of nozzles is four here, but it can be set to other values depending on the application and use conditions.
The nozzles 5A and 5B form one pair, and the nozzles 5C and 5D form the other pair. 5A and 5B are at the same radial distance from the central axis in the longitudinal direction, and the line connecting the tip centers of the nozzles passes through the central axis of the apparatus. The jetting direction of the nozzle is in a plane that passes through the centers of the tips of 5A and 5B and the longitudinal center axis, and is inclined outward by α with respect to the center axis. α is 30 ° to 85 °, and the angle α is changed depending on the type or situation of the deposits deposited in the tube. Due to the ejection reaction force of the nozzles 5A and 5B, only the thrust force in the direction of the central axis in the longitudinal direction is generated, and the rotational force of the nozzle body is not generated.

The jet direction of the nozzles 5C and 5D is the same as the nozzle 5
Similarly to A and 5B, the angle β with respect to the central axis in the longitudinal direction is likewise 30 ° to 85 °, and it is necessary to determine the angle β depending on the type or situation of deposits deposited in the tube. Nozzle 5
First, the positions of C and 5D are determined in the same manner as the nozzles 5A and 5B,
Consider an imaginary plane that passes through the centers of the tips of the nozzles 5C and 5D and the longitudinal center axis. Next, in order to generate a rotational force due to the injection reaction force, the nozzles 5C and 5D are eccentrically positioned by the same distance ε in directions opposite to each other perpendicular to the virtual surface without changing the injection angle. The rotational force is proportional to the injection reaction force or the eccentricity amount ε. The nozzles 5C and 5D simultaneously generate a moving force in the direction of the central axis in the longitudinal direction.

An even number of nozzle tips are attached to each other to form a pair, and the two nozzles forming the pair are arranged at 180 ° opposite to each other with respect to the central axis in the longitudinal direction at the same radial position, and the fluid ejection direction is set to the longitudinal direction. It suffices that the points on the central axis are point-symmetrical and that the total sum of the rotational force or the axial movement force does not become zero. The nozzle tip may be attached so that only rotation occurs first, and the nozzle tip may be further attached to the non-rotating portion so that only movement other than in the longitudinal center axis direction occurs.

A portion 3A of a rotation control portion made of a metal member is attached to the rotor 1 by means of hexagon socket head bolts 11. The rotor rotates on the shaft 2 via the thrust bearing 8 in order to minimize the rotation resistance. It is attached freely. The thrust bearing 8 is positioned by the spacer 7 and fixed to the shaft 2 by the nut 6. The remaining one portion 3B of the rotation control unit made of a magnet is attached to the inside of the cover 16 with hexagon socket head cap screws.
Inside the cover 16, the other one of the rotation control parts 3B is provided.
The shaft 2 is inserted through the shaft 2, and an outer screw is formed on the left end of the shaft 2 and is fixed to the cover 16 by being screwed into an inner screw formed on the inner periphery of the through hole at the left end of the cover 16, Fine adjustment of the axial position with respect to the cover 16 is possible by adjusting the bolt 14 screwed into the left end. Adjusting the axial position of the shaft 2 with respect to the cover 16 adjusts a clearance δ described later. Most of the rotor 1 is housed inside the cover 16. The outer diameter of the shaft 2 near the high-pressure water supply port is increased so as to be the same as the outer diameter of the cover 16, and the rotary nozzle portion is sandwiched so that the main body of the apparatus moves as horizontally as possible when moving in the longitudinal central axis direction. The part is tilted to prevent damage. A scraper 9 or a V ring is attached to the rotor 1 as a shaft-sealing component via a ring 10 to prevent foreign matter from entering the inside. An extremely small labyrinth seal is used as a shaft sealing component between the rotor 1 and the shaft 2.

A clearance δ is set between a portion 3A of the rotating rotation control portion and the remaining portion 3B of the rotation control portion which is stationary. The value of the clearance δ can be finely adjusted by the nut 14, so that the setting of the control rotation speed of the rotor 1 can be changed. Therefore, the setting of the control rotation speed can be changed from the outside without disassembling the device. The setting range of the rotation speed is usually 200 to 1000 rpm in the case of cleaning with water.
A groove is formed in the center of the outer periphery of a part 3A of the rotation control part, and a dust seal 4 such as felt is incorporated in this groove to attract the magnet to the clearance during use in a bad environment such as a sewer pipe. Prevents foreign matter such as iron powder from entering and causing resistance to rotation.

[0015]

EFFECTS OF THE INVENTION Since the reaction force of the fluid ejected from the nozzle is utilized as the rotational force of the nozzle mounting portion and the moving force in the direction of the central axis in the longitudinal direction of the device, the fluid can be continuously ejected in the circumferential direction, It becomes possible to wash uniformly in the circumferential direction. At the same time, since the device can be self-propelled in the longitudinal center axis direction, the cleaning work can be started from the place where the device is first installed, and the work efficiency can be improved. Since the above two effects can be obtained at the same time, the cleaning efficiency is synergistically increased. Since the fluid can be continuously ejected in the circumferential direction, the number of nozzles can be greatly reduced, and the fluid supply pressure can be increased without reducing the work duration, so Then, in the self-propelled cleaning device, it is possible to enhance the removing power of the deposits deposited on the portion to be cleaned.

Since the magnet and the rotating member are arranged so as to face each other with a clearance and the generated magnetic field and the eddy current can be used to control the rotation speed of the nozzle mounting portion, the magnet rotates and self-propels. In the cleaning device, the rotation speed can be stably adjusted according to the scale, and the disturbance of the flow of the ejected fluid due to the excessive rotation speed, the scattering, and the like can be prevented, the cleaning power can be maintained, and the cleaning efficiency can be improved. Since the control rotation speed of the nozzle mounting part can be adjusted by changing the clearance, it is suitable for the scale condition, cleaning fluid type, fluid supply pressure, injection flow rate, etc. in a rotating and self-propelled cleaning device. The number of rotations can be set to a different value and cleaning efficiency can be improved. Further, since the non-contact structure having the clearance is used, a long life effect can be obtained. Since the foreign matter intrusion protection means for the rotating nozzle mounting portion is provided, it is possible to use the rotating and self-propelling cleaning device in a bad environment with many foreign matter. If it is possible to select the nozzle that injects the fluid by using a solenoid valve etc., for example, the self-propelling direction can be set to the front and rear directions to improve work efficiency, and the rotation direction and the injection angle can be changed to improve the cleaning efficiency. Can be increased. Since the structure has no radial local projections, a movement guide is not required, and in addition to the two self-propelling directions, it is possible to clean the inside of the pipe with many bends.

[0017]

[Brief description of drawings]

FIG. 1 is an assembled sectional view of a pipe cleaning device according to an embodiment of the present invention.

FIG. 2 is a part of a front view in the AA direction of the embodiment shown in FIG.

FIG. 3 shows a nozzle connected to a conventional high-pressure washing vehicle.

[Explanation of symbols]

1 ... Rotor 2 ... Shaft 3A ... Rotation control part 3B ... Rotation control part 4 ... Dust seal 5 ... Nozzle tip 5A, 5B, 5C, 5D. . . Nozzle 6 ... Nut 7 ... Spacer 8 ... Thrust bearing 9 ... Scraper 10 ... Ring 11 ... Hexagon socket head bolt 14 ... Bolt 15 ... Hexagon socket head bolt 16 ... ..Cover 17 ... Male and female union adapter 18 ... Hollow hole 19 ... Through hole 20 ... Space 21 ... Communication hole 22 ... Water tank 23 ... Operation panel 24 ... Hydraulic pressure Drive hose reel 25 ・ ・ ・ Manhole 26 ・ ・ ・ Jet pump 27 ・ ・ ・ Burelet nozzle 28 ・ ・ ・ Two-dimensional nozzle 29 ・ ・ ・ Hose 30 ・ ・ ・ High pressure washing car

Claims (3)

[Claims] 1. A nozzle composed of one or more pairs for injecting a pressure fluid, a shaft having a hollow portion for introducing the pressure fluid supplied from a pressure generating source into the nozzle, and a shaft rotatably supported on the shaft. In the in-pipe cleaning device comprising a nozzle mounting portion, and a cover that accommodates a part of the shaft and a part of the nozzle mounting portion, a central axis in the longitudinal direction of the nozzle mounting portion due to a fluid ejection reaction force. Cleaning inside the pipe, wherein the nozzle is arranged so as to cause rotation and self-propelling in the longitudinal center axis direction of the apparatus main body, and rotation control means for adjusting the rotation speed of the nozzle mounting portion is provided inside the cover. apparatus. 2. The rotation control means comprises a magnet mounted inside the cover and a metal member locked to the nozzle mounting portion, which are opposed to each other with a clearance, so that the control rotation speed can be adjusted. The in-pipe cleaning device according to claim 1, wherein 3. The pipe cleaning apparatus according to claim 1, further comprising foreign matter intrusion protection means provided on an outer peripheral surface of the metal member.