JPS6344428B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a pipe cleaning device for removing rust and other various deposits formed on the inner surface of water, gas, and other pipes.
It is particularly suitable for large diameter pipes.

Prior Art This inventor filed Japanese Patent Application No. 59-074940 (currently published as
60-220181) has proposed a pipe cleaning device that has a scraping device and a polishing device, but since a considerable weight acts on the hose that supplies the polishing material to the polishing device with compressed air, it is necessary to properly support it. It turned out that the pipe cleaning device was difficult to move unless it was propelled.

Problems to be Solved by the Invention The present invention solves the above problems and provides a pipe cleaning device that can support a heavy hose and move it forward easily.

Means for Solving the Problems The present invention provides a scraping device in which a scraping portion is arranged so as to have a generally annular shape as a whole, and scrapes off deposits by moving in elastic contact with the inner surface of a pipe. and a polishing device connected to the rear of the scraping device to eject a mixed flow of compressed air and abrasive material onto the inner surface of the pipe from at least one rotating spout pipe extending in at least a radial direction; A pipe cleaning device comprising a hose that sends a mixed flow to the device from the rear, and means for pulling and advancing the scraping device within the pipe,
A pipe cleaning device characterized by including a propulsion support device that extends widely into the pipe behind the polishing device, holds the hose through it, and is propelled by compressed air sent from the rear. This is what we provide.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In one embodiment of the invention shown in the figure, 90 indicates a relatively large diameter pipe to be constructed. This pipe has vertical shafts 91 and 92 formed on both sides so as to be disconnected from other parts for cleaning, and there is rust and other deposits 93 attached to the inner surface.

10 is a scraping device constructed as described below. That is, this scraping device has a main body part 12 made of an elastic metal plate, with the central part protruding forward and the rear part concave, and the peripheral surface widening towards the rear. .
The main body portion may have elasticity at the rear of the predetermined position, and the front portion may be made of a material with high rigidity. The main body part 12 is divided into a plurality of branch parts 13 toward the rear, and each branch part 13 has an elastic rear end and is made of a durable material and has an outer end. A mounting member 15 is fixedly attached as a scraping portion 16 which is bent toward the front and further bent slightly toward the front. The scraping portion 16 may be formed of a metal plate integrated with the main body portion 12 without using the mounting member 15, and the scraping portion 16 only faces outward and does not bend toward the front. You can do it like this. It is desirable that the tip of the scraping portion 16 be slightly divided by a number of small notches 17 as shown in the figure. In some cases, such division by the notch 17 is not performed. Reference numeral 20 denotes an adjusting device for adjusting the degree of expansion of the peripheral surface of the scraping device 10, which includes an annular portion 22 that can be moved forward and backward along a guide portion 21 attached to the inner surface of each branch piece portion 13, and a turnbuckle that adjusts the forward and backward movement of the annular portion 22. 23 are provided.
Therefore, when the turnbuckle 23 is operated to advance the annular portion 22 to suit the inner diameter of the pipe 90, the scraping device 10 is expanded, and when the annular portion 22 is retracted, the scraping device 10 is contracted. In this way, the adjustment device 20 makes it possible to adapt to various inner diameters of the pipe 90, but it is also possible to adapt to the inner diameter of the pipe 90 only by elastic deformation of the branch piece 13 without providing this adjustment device. good.

Reference numeral 27 denotes a guide device disposed in front of the scraping device 10 and rotatably connected to the central portion, and has a main body portion 28 in the center and eight support arms 30 extending radially from the main body portion. There is. Each support arm 30 has a fixed part 31 fixed to the main body part 28 and a movable part 32 that fits into the fixed part so as to be retractable and extend outward via a helical spring 33, A wheel 35 is attached to the tip of the movable part. The guide device 27 is pulled by a winch (not shown) via a wire rope 36. The scraping device 10, which is pulled from the center within the pipe 90 by the guide device 27, can move forward without tilting.

Reference numeral 37 denotes a polishing device, which is constructed as described below. That is, the main body 38 is arranged so as to be able to pass through the center of the pipe 90, and is provided with support arms 40 that are arranged in front and back and extend radially. . 4
Reference numeral 3 designates a flow path formed to penetrate the main body 38 in the front-rear direction, and reference numeral 45 designates a hose that sends a mixed flow 95 of compressed air mixed with an abrasive material such as sand to this flow path. 4
Reference numeral 6 denotes an ejection tube that communicates with the tip of the flow path 43 and is rotatably supported by the main body 38, and includes a radial portion 4 that branches into two, extends in the radial direction, and has a tip that is slightly inclined forward.
8, and the tip of each radial portion forms a jet port 50 that opens at an angle in the same direction of rotation. Therefore, when the mixed flow 95 is supplied from the hose 45, it is ejected from the ejection port 50 and the ejection pipe 4
6 receives a torque that rotates in a direction opposite to the direction of ejection from the ejection port 50 due to a reaction. Reference numeral 51 denotes an electric motor with a continuously variable transmission which has an output shaft 52 whose rear end is fixed to the center of the jet pipe 46, and rotates at a desired rotational speed by decelerating the jet pipe 46 to prevent it from rotating too quickly. It is designed to allow the motor to move, and constitutes a driving device.
Reference numeral 53 denotes a support arm configured similarly to the support arm 30, which maintains the electric motor 51 in the center. The electric motor 51 is connected to the rear part of the scraping device 10 via a wire rope 55. Reference numeral 56 indicates an electric wire leading to the electric motor 51. Instead of the electric motor 51, another drive device such as a hydraulic motor may be used to rotate the ejection pipe 46 at a desired rotational speed.

60 is a hose 4 that spreads widely within the pipe 90
5 is a propulsion support device that is fixed by passing through it. This propulsion support device has a front part 61 whose front central part protrudes and widens toward the rear, and a rear part 62 which is connected to the peripheral edge of this front part and whose central part protrudes rearward, The front part 61 is disposed following the polishing device 37 and is fixed to the hose 45 at a fixing part 63 at the front end, and the rear part 62 is fixed to the hose 45 by a fixing part 64 at the rear end. Reference numeral 65 denotes a protrusion that protrudes in a spiral shape from the surface of the rear portion 62 toward the rear, and is designed to swirl the airflow from the rear and flow it forward through the gap in the peripheral portion. This propulsion support device moves the hose 45 forward while supporting it by receiving an air flow from the rear, and the periphery is almost close to the inner surface of the pipe 90, but there is a certain amount of clearance between the hose 45 and the pipe 90. It's okay if there is.

Reference numeral 66 denotes a rear cover attached to close the rear end of the pipe 90, through which the hose 45 movably passes through an airtight rubber member 67, and an appropriate number of hoses 68 are connected to the compressed air source. A compressed air inlet 70 connected thereto is formed. The compressed air sent from this inlet port pushes forward the propulsion support device 60 that supports the heavy hose 45 through which the mixed flow 95 passes, and the compressed air that has passed around the propulsion support device 60 is scraped off. The device 10 is pushed forward. Reference numeral 73 denotes a cylindrical body that is airtightly connected to the tip of the pipe 90 via a rubber packing 75. An end view 76 is provided at the tip, and an opening 77 is formed in the lower part of this end. A lid 78 is provided which can be opened accordingly. Reference numeral 80 denotes a dust collector connected to the upper part of the cylinder body 73 via a hose 81, and when the dust collector is sucked in by the vacuum suction device 82, it collects deposits 93 removed from the pipe 90, abrasive material used for polishing, etc. There is.

In the configuration as described above, the wire rope 36 is pulled by a winch, and the inlet port 70 is
When compressed air is supplied from the pipe 90 and sucked in by the vacuum suction device 82, and the abrasive material is supplied from the hose 45 as a mixed flow 95 with compressed air, the device of the present invention moves forward in the pipe 90. In this case, most of the deposits 93 on the inner surface of the pipe 90 are efficiently removed by the scraping device 10. Further, the remaining deposits 93 are easily polished and removed by the mixed flow 95 coming out from the jet pipe 46, and most of the mixed flow containing the deposits 93 after this polishing operation is removed by each scraping portion 16. The compressed air flows forward of the scraping device 10 through a gap such as a notch 17 at the tip of the scraper 10 . The mixed flow containing the removed deposits that has come to the front of the scraping device 10 is mostly transferred to the dust collector 80
When the scraping device 10 comes near the front end, the lid 78 can be opened to discharge some of the deposits, abrasives, and other solid materials collected in the cylindrical body 73 and left at the lower part of the cylinder body 73. As shown in FIG. 1, solid matter 97 such as abrasives and rust remains in the downwardly recessed part of the joint part 96 of the pipe, but the propulsion support device 60
It is designed to be removed upwardly and forwardly by the swirling airflow formed by the protruding ridges 65.

In the present invention, the propulsion support device 60 may be changed into various shapes such as a conical surface that protrudes forward, which extends widely within the pipe 90 and can be advanced by compressed air from the rear.
Moreover, even if there is a gap between the inner surface of the pipe 90 and the inner surface of the pipe 90, it is sufficient. Further, it is sufficient if the ridges 65 can guide the compressed air flow in a swirling manner, such as by forming a plurality of spirals curved in the same direction, but there are cases where the ridges 65 are not formed at all. Also, hose 4
As long as the front part is not compressed without installing the propulsion support device 60 at the front end of the vehicle, the propulsion support device 60 may be installed at a position slightly rearward from the front end. or,
The number of radial portions 48 of the ejection pipe 46 may be one or three or more.

Effects of the Invention In the present invention, the heavy hose 45 that supplies abrasive material as a mixed flow 95 using compressed air to the polishing device 37 is supported and propelled by the propulsion support device 60, so that the entire cleaning device is moved inside the pipe 90. This has the effect of making it easier to move around.

As illustrated and explained in the present invention, the protrusion 65 is formed on the rear surface of the propulsion support device 60 to swirl the airflow, and the solid matter 97 such as abrasive material accumulated at the bottom of the joint 96 of the pipe 90 is completely removed. It can be removed.

Further, in the present invention, the use of the guide device 27 and the drive device such as the continuously variable transmission electric motor 51 has the advantage that the scraping device 10 is prevented from tilting and the jet pipe 46 can be rotated at an appropriate speed. It is something.

[Brief explanation of the drawing]

Fig. 1 is a side view schematically showing an embodiment of the present invention in partial cross section, Fig. 2 is a front view thereof, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 shows an adjustment device. 5 is a perspective view showing a part of the scraping device, FIG. 6 is a sectional view taken along line BB in FIG. 3, and FIG. 7 is a rear view of the propulsion support device. 10 is a scraping device, 13 is a branch piece portion, 16 is a scraping portion, 27 is a guide device, 36 is a wire rope,
37 is a polishing device, 45 is a hose, 46 is an ejection pipe,
51 is an electric motor with a continuously variable transmission, 60 is a propulsion support device, 61 is a front portion, 62 is a rear portion, 65 is a protrusion, 68 is a hose, 70 is an inlet, 80 is a dust collector, and 82 is a vacuum suction device.

Claims (1)

[Claims] 1. A scraping device in which a scraping section that scrapes off deposits by moving in elastic contact with the inner surface of a pipe is arranged in a generally annular shape, and a scraping device connected to the rear of the scraping device. a polishing device for ejecting a mixed flow of compressed air and an abrasive material onto the inner surface of the pipe from at least one rotating spout pipe extending in at least a radial direction; and a hose for sending the mixed flow to the polishing device from behind. , a pipe cleaning device having means for pulling and advancing the scraping device within the pipe, the device being configured to extend widely into the pipe behind the polishing device, and holding the hose through the pipe from behind. A pipe cleaning device comprising a propulsion support device propelled by compressed air sent.