JP2021053605A - City water facility rust removal device and city water facility rust removal method - Google Patents

Abstract

To provide a city water facility rust removal device suitable for removing a rust bump produced on the inner side of a water feed pipe by inserting a cutting tool into the water feed pipe.SOLUTION: A city water facility rust removal device 1 includes a fluid ejector 2 which ejects fluid from an ejection port part 2a, a flexible pipe body 3 which has a rear end part attached to the ejection port part 2a and induces fluid and a cutting tool 4 which has a joint part 4b allowing a cutting part 4a and a cutting part 4a to freely rotatably connect with each other, sets up the joint part 4b onto a tip part of the pipe body 3 such that a rotation shaft direction of the cutting part 4a is in accord with the axial direction of the tip part of the pipe body 3, forms a fluid path 40 which causes fluid to flow in from the pipe body 3 to curve a course of the fluid and eject the fluid, on an inner part and, thereby, rotates the cutting part 4a with respect to the joint part 4b.SELECTED DRAWING: Figure 1

Description

The present invention is a water supply facility suitable for removing rust humps formed in or near a perforated portion formed in a water distribution pipe in order to provide a diversion plug for branching a water supply pipe from the water pipe, particularly in the water pipe. Rust removal equipment and water supply equipment Rust removal method.

Water supply equipment includes water pipes (water distribution pipes, water supply pipes, etc.) or water supply equipment connected to them (water diversion taps, water stop valves, water meters, etc.). Various things are known. Among these, there is also known a water supply equipment cleaning device capable of cleaning the inside of a water pipe or other water supply equipment by inserting a flexible long object having a cleaning tool attached to the tip into the water pipe. .. Cleaning the inside of water supply pipes removes dirt and rust attached to it.

For example, in Patent Document 1, ozone water is jet-pressured from a jet nozzle of a cleaning tool attached to the tip of a flexible long flexible tube inserted into a water supply pipe to give a jet pressure to the inside of the water supply pipe. A water supply equipment cleaning device that jets jets is disclosed. Also. Patent Document 2 describes a water facility cleaning device (pipe removal) that blows air to the spherical body of a cleaning tool attached to the tip of a lead wire of a flexible long object inserted in a pipe such as a water pipe to disturb it. Rust machine) is disclosed. Further, in Patent Document 3, a disk-shaped brush of a cleaning tool attached to the tip of a flexible shaft of a flexible long object inserted into a tubular member such as a water pipe is used as a flexible shaft by a rotational power source outside the pipe. A water pipe cleaning device (cleaning tool in a pipe) that is rotated through a pipe is disclosed.

Japanese Unexamined Patent Publication No. 2006-207266 Japanese Unexamined Patent Publication No. 1-299683 Japanese Unexamined Patent Publication No. 2000-31268

By the way, in the pipes of water pipes that have not been used for a long period of time, for example, in the perforated portion formed in the water pipe for providing a diversion plug for branching the water pipe from the water pipe, or in the vicinity thereof, the water pipe is made of cast iron. In some cases, rust grows and affects the flow of tap water in the water pipe, and even a large rust hump that blocks the inside of the pipe may be formed. For the rust hump, insert a flexible long object from the joint part that is the connection part between the water stopcock, water meter, etc. and the water supply pipe in the residential land, and remove the rust hump with the cleaning tool attached to the tip. Will be done. However, in Patent Documents 1 and 2, it is difficult to set the water pressure or air pressure so that the rust hump can be removed. Further, in Patent Document 3, even if the shape of the disk-shaped brush is devised, the flexible shaft can be bent and rotated at some bent portion in a narrow (for example, about 13 mmφ to 25 mmφ inner diameter) water supply pipe. It's difficult to do. Therefore, the conventional water supply facility cleaning device as described in Patent Documents 1 to 3 does not correspond to a rust hump formed in or near a perforated portion formed in a water distribution pipe for providing a water diversion faucet. Absent.

The present invention has been made in view of the above reasons, and an object of the present invention is a water supply suitable for removing a rust hump formed in or near a perforated portion formed in a water distribution pipe for providing a water diversion tap. The purpose is to provide equipment rust removing equipment and water supply equipment rust removing methods.

In order to achieve the above object, the water supply equipment rust removing device according to claim 1 has a fluid ejector that ejects a fluid from a spout portion and a rear end portion that is attached to the spout portion to guide the fluid. The joint portion has a flexible pipe body and a joint portion in which the cutting portion and the cutting portion are rotatably connected, and the rotation axis direction of the cutting portion coincides with the axial direction of the tip portion of the pipe body. Is attached to the tip of the tubular body, and a fluid path is formed inside to allow the fluid to flow in from the tubular body and eject the fluid by bending the course of the fluid. It is characterized by being provided with a cutting tool that rotates with respect to the fluid.

The water supply equipment rust removing device according to claim 2 is the water supply equipment rust removing device according to claim 1, wherein a portion of the fluid path through which the fluid flows is formed in the direction of the rotation axis. And.

The water supply equipment rust removing device according to claim 3 is the water supply equipment rust removing device according to claim 1 or 2, wherein the pipe body has an outer pipe and an inner pipe, and the fluid is the inner pipe. The outer pipe is harder than the inner pipe and is equipped with the joint portion.

The water supply equipment rust removing device according to claim 4 is the water supply equipment rust removing device according to claim 3, wherein the external pipe is configured to have a close contact spring.

The water supply equipment rust removing device according to claim 5 is the water supply equipment rust removing device according to any one of claims 1 to 4, wherein a sensor portion of an ultra-small camera, a sound sensor, or a vibration sensor is provided at the joint portion. Is incorporated.

In the method for removing rust from water equipment according to claim 6, a camera is attached to the tip of the pipe body in advance, inserted into the water pipe, the distance to the rust hump is grasped, and after grasping, the camera is pulled out from the water pipe. The camera is replaced with a cutting tool having a cutting portion, the cutting tool is inserted into the water pipe, positioned at the distance to the rust hump grasped in advance, and the rust hump is removed by rotation of the cutting portion. It is characterized by doing.

The method for removing rust from water supply equipment according to claim 7 is to insert a cutting tool having a cutting portion into a water pipe, bring the cutting tool into contact with a tube body attached to the tip portion, and bring a hearing instrument or a vibrometer into contact with the cutting tool. The normal rotation, stop, and abnormal rotation of the part are known by sound or vibration, and by checking the situation during cutting of the rust hump, the pipe body is taken in and out or the rotational force of the cutting part is adjusted to adjust the rotational force of the cutting part. It is characterized in that the rust hump is removed by rotation.

According to the water supply equipment rust removing device and the water supply equipment rust removing method according to the present invention, it is possible to easily remove the rust hump formed at or near the perforated portion formed in the water distribution pipe for providing the water diversion faucet. ..

It is the schematic which shows the water supply equipment rust removal apparatus which concerns on embodiment of this invention. The pipe body and cutting tool of the water supply equipment rust removing device as described above are shown, in which (a) is a plan view, (b) is a front view, (c) is a bottom view, and (d) is a left side view. .. It is a front view sectional view (cut by the plane shown by AA of FIG. 2A) which shows the pipe body and the cutting tool of the water supply equipment rust removal device of the same above. It is sectional drawing which shows the cutting tool of the water supply equipment rust removal device of the same above, (a) is cut at the surface shown by BB of FIG. 3, (b) is the surface shown by CC of FIG. It is cut. It is schematic cross-sectional view which shows the use example of the water supply equipment rust removal device in the same-mentioned reduction. It is sectional drawing which shows the use example of the water supply equipment rust removal device of the same above. It is a front view sectional view which shows the modification of the water supply equipment rust removal device of the same above.

Hereinafter, modes for carrying out the present invention will be described. As shown in FIG. 1, the water supply equipment rust removing device 1 according to the embodiment of the present invention includes a fluid ejector 2, a pipe body 3, and a cutting tool 4.

The fluid ejector 2 ejects the fluid from the ejection port portion 2a by pressurizing the fluid with a pump or the like. As the fluid, water stored in a tank or the like can usually be used. As the fluid, a liquid or gas other than water (for example, compressed air) can be used. The fluid ejector 2 can easily control the amount of the fluid ejected by controlling the pump or the like.

The tubular body 3 is flexible and has a desired length (see FIG. 2). A rear end portion of the pipe body 3 is attached to the ejection port portion 2a of the fluid ejector 2 (see FIG. 1), and the fluid injected from the ejection port portion 2a is guided. If the tube body 3 is thin, its diameter can be, for example, about 8 mm.

As shown in FIG. 3, the tube body 3 can have an outer tube 3a and an inner tube 3b. The fluid injected from the ejection port portion 2a flows through the inner pipe 3b. As the inner tube 3b, a flexible tube, for example, a resin tube such as a nylon tube or a polypropylene tube can be used. The outer tube 3a is harder than the inner tube 3b. As will be described later, the outer pipe 3a has flexibility that does not bend or bend to hinder the progress when it is inserted into the water supply pipe P and advances, and the force at the time of insertion can be transmitted. It has hardness. The outer pipe 3a is provided with a joint portion 4b of a cutting tool 4, which will be described later, at the tip thereof. A hard member constituting the pipe body 3 such as a hard outer pipe 3a rusts the cutting portion 4a with a pressing force that opposes the reaction when the rust hump is cut by the cutting portion 4a described later of the cutting tool 4. You can keep pressing it against the hump.

The outer tube 3a can be configured to have a metal or resin tube, a bellows hose, or the like that is harder than the inner tube 3b, and is preferably configured to have a metal contact spring. The close contact spring has a coiled wire, and the adjacent coils are in close contact with each other when no external force is applied. The close contact spring is flexible, and a force that keeps pressing the cutting portion 4a against the rust hump can be easily obtained.

The cutting tool 4 has a cutting portion 4a and a joint portion 4b. The material of the cutting tool 4 may be one that is generally used as a cutting tool blade. Further, the surface of metal or the like may be coated with diamond, ceramics or the like.

The shape of the cutting portion 4a is not particularly limited, but the cutting portion 4a usually has one or a plurality of corner portions 4aa so as to cut a rust hump (FIGS. 2 (b) and 2 (d)). reference). Further, if the cutting portion 4a has a curved surface portion 4ab (see FIG. 2D) in addition to the corner portion 4aa, when the cutting portion 4a is inserted into the water supply pipe P and advances as described later, the water supply pipe P It is easy to pass through even in the bent portion. The cutting portion 4a is rotatably coupled to the joint portion 4b. Therefore, the bearing 4c can be provided between the cutting portion 4a and the joint portion 4b (see FIGS. 3 and 4A).

The joint portion 4b is attached to the tip portion of the pipe body 3 so that the rotation axis direction of the cutting portion 4a coincides with the axial direction of the tip portion of the pipe body 3. When the rotation axis direction of the cutting portion 4a coincides with the axial direction of the tip portion of the tubular body 3, when cutting the rust hump, the cutting portion 4a rotated by the tubular body 3 can be continuously pressed against the rust hump. ..

The joint portion 4b preferably has an insertion portion 4ba (for example, one having a connection structure such as an insertion type or a screw type) and is detachably attached to the tip portion of the pipe body 3 (specifically, the outer pipe 3a). Will be done. Then, the cutting tool 4 of the cutting portion 4a worn by cutting can be easily replaced with a new one, and the cutting tool 4 can be temporarily replaced with another member (for example, a camera).

The cutting tool 4 has a fluid path 40 formed therein, in which a fluid flows in from the pipe body 3, the course of the fluid is bent, and the fluid is ejected from the ejection opening 40a. By ejecting the fluid in this way, a rotational force is generated in the cutting portion 4a with respect to the joint portion 4b. The ejection opening 40a is provided on the peripheral surface of the cutting portion 4a (see FIG. 2C), and as shown in FIG. 4B, the ejection opening 40a can be shifted from the rotation axis GA of the cutting portion 4a by a predetermined eccentric distance GB. it can. In that case, the fluid passage 40 can have a fluid inflow portion 40b, an intermediate portion 40c, and a fluid ejection portion 40d. The fluid inflow portion 40b is a portion through which the fluid flows, and is usually formed along the rotation axis GA of the cutting portion 4a (see FIG. 3). The fluid ejection portion 40d is a portion communicating with the ejection opening 40a, and usually extends in a direction substantially perpendicular to the fluid inflow portion 40b. The intermediate portion 40c communicates with the fluid flow portion 40b and the fluid ejection portion 40d, and usually communicates with both of them substantially perpendicularly.

The rotational force of the cutting portion 4a can be controlled by controlling the amount of fluid ejected from the fluid ejector 2. The rotational force of the cutting portion 4a stops the cutting portion 4a so as not to damage the inner wall of the water supply facility (for example, the water supply pipe P, the water diversion tap S, the water distribution pipe Q, etc., which will be described later). It can be controlled according to the condition of the rust hump by applying a torque limit such as.

In the water pipe rust removing device 1 having the configuration described above, the pipe body 3 is a joint portion where the water pipe P is connected to the water stopcocks S1 and S2, the water meter M, etc. in the residential land E with the cutting tool 4 at the head. It is inserted from the portion and sent to the water distribution pipe Q side laid under the road R, and as shown in FIG. 5, the water distribution pipe Q is passed through the water diversion tap S that connects the water supply pipe P to the water distribution pipe Q. It is possible to reach the rust hump formed at or near the perforated portion formed in.

The cutting tool 4 can remove rust humps formed on or near the perforated portion formed in the water distribution pipe Q. Rust humps are likely to occur due to the perforation of the water pipe Q for connecting the water supply pipe P to the water pipe Q, and especially when the water pipe Q is made of cast iron. For example, even if the rust hump is large enough to block the inside of the water diversion faucet S, as shown in FIG. 6, the rust hump (indicated by reference numeral C in FIG. 6) is rotated by the cutting portion 4a. Can be cut.

Next, the work of removing the rust hump formed at or near the perforated portion formed in the water distribution pipe Q will be described. With the cutting portion 4a in contact with the rust hump and a constant pressing pressure applied, the fluid is made to flow in from the tubular body 3, and the fluid is ejected from the ejection opening 40a to rotate the cutting portion 4a, thereby gradually rotating the cutting portion 4a. The rust hump is scraped. The scraped rust dust passes between the pipe body 3 and the inner wall of the water supply pipe P together with the fluid ejected from the ejection opening 40a, and is discharged from the joint portion on the inlet side into which the pipe body 3 is inserted. Further cutting continues, and when the water distribution pipe Q and the water supply pipe P communicate with each other through the closed water faucet S, the scraped rust debris is distributed together with the fluid ejected from the ejection opening 40a. It is pushed by tap water from the water pipe Q, passes between the pipe body 3 and the inner wall of the water supply pipe P, and is discharged from the joint portion on the entrance side into which the pipe body 3 is inserted. It can be confirmed that the water distribution pipe Q and the water supply pipe P communicate with each other due to the increase in the flow rate of the discharged fluid (fluid ejected from the ejection opening 40a and tap water). After that, if the discharged fluid is no longer mixed with rust debris, it can be confirmed that the rust hump has been removed.

It is also possible to attach a camera to the tip of the pipe body 4 and insert it into the water supply pipe P in advance to grasp the distance to the rust hump and its state. After grasping, the camera is pulled out from the water supply pipe P, and the camera is replaced with the cutting tool 4. The cutting tool 4 of the water supply equipment rust removing device 1 thus configured is inserted into the water supply pipe P and positioned at a distance to the rust hump grasped in advance, and the rust hump is removed by the rotation of the cutting portion 4a.

Further, in order to know whether or not the cutting portion 4a is rotating smoothly while cutting the rust hump using the water supply equipment rust removing device 1, a stethoscope or a vibrometer or the like is brought into contact with the pipe body 3 and the cutting portion 4a is brought into contact with the pipe body 3. The normal rotation, stop, and abnormal rotation of the cutting portion 4a can be known by sound or vibration. As a result, the condition during cutting of the rust hump can be confirmed, so that the pipe body 3 can be taken in and out and the rotational force of the cutting portion 4a can be adjusted. Furthermore, it is also possible to improve workability by recording in advance the waveform of sound or vibration according to the condition of the rust hump and proceeding with the work with reference to this.

Further, instead of the above-mentioned camera, stethoscope or vibrometer, a sensor unit 4d (ultra-small camera, sound sensor, vibration sensor, etc.) can be incorporated in the joint portion 4b as shown in FIG. Then, it is possible to easily know whether or not the cutting portion 4a is rotating smoothly. The position where the sensor unit 4d is incorporated is not particularly limited. In addition, when the sensor unit 4d is an ultra-small camera, the state of rust hump can be known, and the cutting unit 4a is made of a transparent member (for example, a member made of polycarbonate or acrylic) or the ultra-small camera is surrounded. It is also possible to know the state of the rust hump during cutting by making the field of view so that you can see. Reference numeral 4e in FIG. 7 indicates the wiring of the sensor unit 4d.

The water supply equipment rust removing device and the water supply equipment rust removing method according to the embodiment of the present invention have been described above, but the present invention is not limited to those described in the above-described embodiment, but is described in the scope of claims. Various design changes are possible within the scope of the matter. Further, the present invention is applicable not only to the water supply pipe P but also to any kind of water pipe, and is limited to a rust hump formed at or near the perforated portion formed in the water distribution pipe Q. However, it can be applied to rust humps formed in the pipes of any kind of water supply equipment.

1 Water supply equipment rust remover 2 Fluid ejector 2a Fluid ejector outlet 3 Pipe 3a Outer pipe of pipe 3b Inner pipe of pipe 4 Cutting tool 4a Cutting part 4aa Corner part of cutting part 4ab Curved surface of cutting part Part 4b Joint part 4ba Joint part insertion part 4c Bearing 4d Sensor part 4e Sensor part wiring 40 Fluid passage 40a Fluid passage ejection opening 40b Fluid passage fluid inflow portion 40c Fluid passage intermediate portion 40d Fluid ejection portion C Rust hump E Residential land GA Rotation axis of cutting part of cutting tool GB Eccentric distance of ejection opening in fluid path of cutting tool M Water meter P Water supply pipe Q Water distribution pipe R Road S Water diversion tap S1, S2 Stopcock

Claims (7)

A fluid ejector that ejects fluid from the spout,
A flexible tube whose rear end is attached to the spout to guide the fluid,
The cutting portion has a joint portion that rotatably connects the cutting portion, and the joint portion is the tip portion of the pipe body so that the rotation axis direction of the cutting portion coincides with the axial direction of the tip portion of the tube body. A cutting tool that is mounted on the pipe body to allow the fluid to flow in, bend the course of the fluid, and eject the fluid path, and the cutting portion rotates with respect to the joint portion by ejecting the fluid. When,
Water supply equipment rust removing device characterized by being equipped with. In the water supply equipment rust removing device according to claim 1.
The fluid passage is a water supply equipment rust removing device, characterized in that a portion through which the fluid flows is formed in the direction of the rotation axis. In the water supply equipment rust removing device according to claim 1 or 2.
The pipe body has an outer pipe and an inner pipe, the fluid flows through the inner pipe, the outer pipe is harder than the inner pipe, and the joint portion is attached. Water supply equipment rust remover. In the water supply equipment rust removing device according to claim 3.
The external pipe is a rust removing device for water supply equipment, which is configured to have a close contact spring. In the water supply equipment rust removing device according to any one of claims 1 to 4.
A rust removing device for water supply equipment, characterized in that a sensor portion of an ultra-small camera, a sound sensor, or a vibration sensor is incorporated in the joint portion. A camera is attached to the tip of the pipe in advance and inserted into the water pipe to grasp the distance to the rust hump, and after grasping, the camera is pulled out from the water pipe and the camera is replaced with a cutting tool having a cutting portion. A method for removing rust from water pipes, which comprises inserting the cutting tool into the water pipe, locating the cutting tool at the distance to the rust hump grasped in advance, and removing the rust hump by rotating the cutting portion. A cutting tool having a cutting portion is inserted into a water pipe, the cutting tool brings a hearing device or a vibrometer into contact with a pipe body attached to the tip portion, and sounds or vibrates the normal rotation, stop, and abnormal rotation of the cutting portion. It is characterized in that the rust hump is removed by the rotation of the cutting portion by checking the situation during cutting of the rust hump and adjusting the rotational force of the pipe body or the cutting portion. Water supply equipment rust removal method.

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