JPH0615777U - Inner surface cleaning tool for small diameter pipes - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an inner surface cleaning tool for a small-diameter pipe that can be inserted into a small-diameter curved pipe and that cleans the inner surface quickly and reliably. [Structure] A hose 1 having a flexible shaft 3 extending along a center line and having one end connected to a vacuum pump, and a center hole coaxially fitted to the other end of the hose 1 at an outer periphery of an intermediate portion. A stationary suction plate 6 in which a wire brush 12 is provided so as to be circumferentially widened in a conical shape, and a central rotating shaft 8 which is axially supported along a center line and whose one end is connected to the distal end of the flexible shaft 3 is supported. , The central rotating shaft 8
A central boss is coaxially fitted to the tip of the wire, a wire brush 13 is provided around the outer periphery of the intermediate portion, and a conical expanded end of the tip has a small axial gap in the conical expanded end of the same diameter of the stationary suction disk 6. A rotary suction disk 7 that is present and opposed to each other, and a recess 15 for sucking polishing debris that is provided on either one of the facing surfaces of the expanded ends of the suction disks 6 and 7 are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inner surface cleaning tool for small diameter pipes.

[0002]

[Prior art]

 In a nuclear power plant, a thermal power plant, etc., as shown in FIG. 3, when a curved pipe formed by welding a plurality of small-diameter pipes in a crank shape with a plurality of elbows is used, it projects to the inner surface of the welded joint. The inside surface is smoothed by grinding the back bead with a special polishing tool. In this case, in order to remove grinding debris inside the small diameter pipe, blow high pressure air, high pressure water, etc. into the inside of the small diameter pipe using a hose, and blow off this to the outside of the pipe, or insert a suction hose into the pipe. A means for discharging the grinding dust with a vacuum pump is adopted.

[0003]

[Problems to be solved by the device]

 However, such a means using high-pressure air or high-pressure water causes problems such as dust scattering and wastewater treatment at that time, though it is simple. In addition, when the hose of the vacuum cleaner is inserted into the pipe, it is extremely difficult to completely clean the dust adhering to the inner surface of the pipe. There is a demand for the development of tools that reliably clean the area.

The present invention has been proposed in view of such circumstances, and provides an inner surface cleaning tool for a small-diameter pipe that can be inserted into a small-diameter curved pipe and cleans the inner surface thereof quickly and reliably. The purpose is to

[0005]

[Means for Solving the Problems]

 To this end, the present invention has a built-in flexible shaft that extends substantially coaxially along the center line. One end of the hose is connected to the vacuum pump, and the other end of the hose has a center hole coaxially fitted. A static suction disk is provided around the middle part of the wire, the tip of which extends in a conical shape, and the end of which is pivotally supported along the center line and whose one end is connected to the tip of the flexible shaft to support a central rotating shaft. And a central boss is coaxially fitted to the front end of the central rotation shaft, and a wire brush is provided around the outer periphery of the intermediate part, and the conical expanded end of the tip is the conical expanded end of the same diameter of the stationary suction disk. It was equipped with a rotary suction plate facing each other with a small axial gap, and a recess for sucking polishing debris that was recessed in one of the facing surfaces of the expanded ends of both suction plates. Is characterized by.

[0006]

[Action]

 According to such a configuration, the following actions are performed. (1) When the brush at the tip rotates, dust that adheres to the inner surface of the pipe is removed. (2) Since the suction port also rotates together with the brush, dust on the entire circumference of the inner surface of the pipe can be absorbed. (3) The suction force will be dispersed and weakened if the suction port is made all around, so the suction force is made stronger by making it a suction port with a length of 1/3 to 1/5 of the inner circumference of the pipe and rotating it in the circumferential direction. By moving the hose forward or backward, it is possible to reliably clean the scattered iron powder and dust from the grinder grindstone when removing the backside bead.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view thereof, and FIG. 2 is an exploded perspective view of FIG. In the above figure, 1 is a hose of a vacuum cleaner, which is made of rubber or plastic having flexibility so that it can easily pass through the inside of a small diameter pipe. Reference numeral 2 denotes a fitting for the flexible shaft 3, which is a connector for connecting to the hose 1 which extends along the center line of the hose 1 to be inserted into the pipe and which is rotatably supported around the center line. Reference numeral 4 is a motor for rotating the flexible shaft 3, and 5 is a band for fixing the hose 1 to each component. Reference numerals 6 and 7 denote stationary suction plates for sucking dusts and the like, 6 is a non-rotating portion which is connected to the hose 1 and is integral with the hose, and 7 is coaxially supported with the stationary suction plate 6 and has a rotating shaft 8 It is a rotary suction disk that is opposed to the stationary suction disk with a small gap in between. The static suction disk 6 and the rotary suction disk 7 face each other with a large-diameter portion having the same diameter, and a brush 12 and a brush 13 are provided around the outer periphery of the small-diameter portion that follows the large-diameter portion with a conical portion.

The large diameter portion of the rotary suction disk 7 has a recess formed by cutting out a length of about 1/3 to 1/5 of the entire circumference, and this recess absorbs dust and the like at the suction port 15. Since the suction port 15 rotates via the flexible shaft 3, the bearing 9, and the rotary shaft 8, dust on the inner circumference of the pipe can be cleaned. Reference numeral 14 is a centering metal fitting for fixing a bracelet-shaped device made of spring steel by using several hose bands 5 at equal pitches between the brushes 12 in order to prevent the brush 12 from bending. In addition, 10 is a bearing 9 bearing metal, and 11 is a cap.

[0009]

[Effect of device]

 With such a structure, the following effects can be obtained. Since the hose and the flexible shaft have flexibility, they can be easily inserted inside the small diameter curved pipe. It is possible to completely suck and clean the dust etc. ground by the backside bead grinding device while rotating the rotary suction disk with respect to the stationary suction disk via the flexible shaft with the motor, and the reliability of a series of work. The property is improved.

In short, according to the present invention, a flexible shaft that extends substantially coaxially along the center line is built in, one end of which is connected to a vacuum pump, and the other end of which has a central hole that is coaxial. Are fitted together and a wire brush is installed around the outer periphery of the middle part, the tip expands in a conical shape, and the axis of rotation is supported along the center line and one end supports the central rotation shaft connected to the tip of the flexible shaft. The center suction boss is coaxially fitted to the tip of the central rotary shaft, and the wire brush is installed around the outer circumference of the intermediate part. A rotary suction plate facing the expanded end with a small gap in the axial direction, and a recess for sucking polishing debris formed on either one of the facing surfaces of the expanded ends of the suction plates. As it is equipped, it can be inserted into a small-diameter curved pipe. The present invention is extremely useful industrially because it is possible to obtain an inner surface cleaning tool for a small diameter pipe that can clean the inner surface quickly and reliably.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a vertical cross-sectional view showing an example of a curved small diameter tube.

[Explanation of symbols]

 1 Hose 2 Flexible Shaft Fixture 3 Flexible Shaft 4 Motor 5 Hose Band 6 Static Suction Plate 7 Rotating Suction Plate 8 Rotating Shaft 9 Bearing 10 Bearing Metal 11 Cap 12 Brush 13 Brush 14 Centering Metal Fitting 15 Suction Port 16 Tube 17 Elbow

Claims (1)

[Scope of utility model registration request] 1. A hose having a built-in flexible shaft extending substantially coaxially along a center line, one end of which is connected to a vacuum pump, and the other end of the hose having a center hole coaxially fitted and intermediate. A stationary suction plate which is provided with a wire brush around the outer periphery of the portion and has a tip that spreads in a conical shape and that supports a central rotating shaft that is axially supported along a center line and has one end connected to the tip of the flexible shaft. A central boss is coaxially fitted to the tip of the central rotating shaft, a wire brush is provided around the outer periphery of the intermediate portion, and the conical expanded end of the tip has a small axial direction at the conical expanded end of the same diameter of the stationary suction disk. A small diameter characterized by comprising a rotary suction plate facing each other with a gap and a recess for sucking polishing debris which is recessed in one of the facing surfaces of the expanded ends of the both suction plates. Tool for cleaning the inner surface of pipes.