JPH0722741B2 - Pipe cleaning equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cleaning device for removing various deposits such as rust and water stains formed on the inner surface of water pipes, gas pipes and other pipes. When cleaning is performed by passing compressed air containing an abrasive, the polishing time can be further shortened, while the polishing can be efficiently performed according to the pipe diameter size. The present invention relates to a pipe cleaning device capable of efficiently cleaning a pipe at a lower end of a pipe connected to a horizontal pipe.

[0002]

2. Description of the Related Art Pipelines such as various large-diameter pipes, water mains, gas mains, etc. begin to oxidize in a few years and start to corrode after 10 years, and water pipes etc. contain red water containing rust. However, if the pipe deteriorates and deteriorates further, holes will occur in the pipe, leading to water leaks and gas leaks, and the entire pipe must be replaced. Therefore, various cleaning devices have been developed and used as a device for cleaning the pipe for removing the rust or various deposits formed on the inner surface of the pipe to rehabilit the pipe and restore the function to the previous state. It was

Among the above-mentioned devices, as a device which does not use water during working and does not cause a problem of water treatment during pipe cleaning, an air sand method, that is, a high-pressure and high-speed air flow (turbulent flow) together with an abrasive material is used. Since a cleaning device adapted to perform a dry method of spraying on the inner surface of a pipe is efficient, it is widely used for a relatively large diameter pipe. In this air sanding method, compressed air is used to form a high-speed air flow without or without a swirling motion, and an abrasive made of sand or the like is supplied to pass through the pipe to polish the inner peripheral surface of the pipe. Although rust and other deposits are removed, this product has a drawback in that a large amount of compressed air and an abrasive material are required as the inner diameter of the pipe increases, and the cost increases. As a device that eliminates this drawback and enables efficient cleaning of large-diameter pipes, a mixed flow of compressed air and abrasive from a nozzle directed to the inner surface of the pipe is used in combination with a means for scraping off the deposits on the inner surface of the pipe. Various types have been proposed in which the particles are sprayed and rotated to perform polishing (see Japanese Patent Laid-Open Nos. 60-220181, 61-93884 and 1-135575 proposed by the applicant).

[0004]

In the cleaning device improved by the air sanding method, when a mixed flow of compressed air and an abrasive is jetted from the rotating nozzle to the inner surface of the pipe and is advanced to polish the inner surface of the pipe. With the conventional nozzle diameter, the polishing area of the inner surface of the pipe is small, so if the nozzle is advanced forward quickly, the polishing surface becomes spiral and uneven, and in order to finish the polishing surface satisfactorily, reduce the nozzle advance speed There is a problem in that the number of times must be increased and the polishing time becomes long.

Further, in the case of an umbrella-shaped scraping member made of an elastic metal plate which is used for contacting the inner surface of a pipe, which is used as means for scraping off rust on the inner surface of the pipe, and a cutter supported by the elastic member. Although it is applicable to a predetermined large-diameter pipe, its application range is extremely narrow, and it was not possible to adapt widely to a smaller diameter and scrape off the adhered substances to carry out polishing work.

Further, in these conventional devices, a vertical pipe for cooling water such as a building is separated from an elbow pipe for connecting a horizontal pipe continuously connected to the lower end of the pipe due to its structure. There was a problem that it could not be integrally cleaned without it.

The present invention has been made in view of the above points, and is provided with a polishing device that advances while ejecting a mixed flow of compressed air and an abrasive from a nozzle that rotates around the axis of a pipe. While shortening the polishing time in the pipe cleaning device, the inner surface can be widely polished to a wider range than conventional pipes, depending on the size of the pipe to be polished, and it can be connected to the vertical pipe and its lower end. It is an object of the present invention to provide a pipe cleaning device capable of cleaning a separated elbow pipe without separating it.

[0008]

In order to achieve the above object, the present invention comprises at least means for passing compressed air into the pipe and means for supplying an abrasive to the flow of the compressed air, and at least the pipe. Compressed air containing abrasives is ejected from a nozzle whose inside is rotatably supported by a support capable of moving in the axial direction of the pipe and whose tip opening is directed to the inner surface of the pipe. As a cleaning device for a pipe having a polishing device in which a nozzle rotates, a nozzle opening is formed in an elongated opening having a long side along the axial direction of the pipe.

As a pipe cleaning device,
The pipe is provided with a means for passing compressed air and a means for supplying an abrasive to the flow of the compressed air, and a support capable of moving in the pipe axial direction is rotatable about the pipe axis. A polishing device, which is supported and has its tip opening directed to the inner surface of the pipe, to eject compressed air containing polishing material from a nozzle, and is connected in the forward direction of the polishing device through a universal joint and the axis of the pipe. A plurality of cutter blades are radially provided on the outer periphery of a cutter blade support base shaft rotatably connected to the rear portion of the front support body that can move in the direction via a universal joint on the axis of the pipe. A cutter device attached via a pantograph in which four links each form a parallelogram so that the contact radius with the pipe inner peripheral surface can be adjusted from the minimum diameter to a predetermined maximum diameter, Serial is formed so as to be driven by either the annexed been motors of the front and rear of the support, which the polishing device and the cutter device equipped with a means for advancing in the pipe is effective.

The adjustment of the contact radii of the plurality of cutter blade tips with the inner surface of the pipe in this cutter device is performed between the outer side link provided with the pantograph cutter blade and the cutter blade supporting base shaft, and the respective end portions are positioned. It is preferable that the interlocking member connected to the intermediate portion of the axially attached link is moved in the axial direction of the pipe from the front support.

Further, means for advancing the aforesaid polishing device and cutter device within the pipe are at least a wire coupled to the front support of the cutter device and a winch installed above the vertical pipe for winding the wire. The winch is configured so that the hose feeding speed of the hose winding device that drives the hose drum wound with the hose for supplying the polishing material to the polishing device and the wire winding speed of the winch are the same. And the hose take-up device are driven synchronously, and the sledge-like body formed in an arc shape in the axial direction of the pipe is attached in the radial direction to the portions of the supports before and after the polishing device and the cutter device that contact the inner surface of the pipe. By urging it, the vertical pipe and the elbow pipe for connecting the horizontal pipes connected to the lower end of the pipe are integrally cleaned. It can be a device such as.

[0012]

As described above, in the case of the pipe cleaning device in which the nozzle opening of the polishing device is formed in the elongated opening having the long side along the axial direction of the pipe, the pipe such as the water main is cleaned. In this case, when advancing the polishing apparatus while spraying the polishing material from the rotating nozzle, the width of the rotation locus of the opening is wide, so the polishing area for each rotation is large, and even if the number of polishing is small, the polishing surface does not become a spiral state. Since the unevenness is not possible, the polishing work can be completed in a short time.

When the cutter device located in front of the polishing device advances the device while scraping off rust on the inner peripheral surface of the pipe, the cutter blade is radially provided on the outer peripheral portion of the cutter blade support base shaft of the cutter device. Each of the four links is attached via a pantograph forming a parallelogram, and the contact radius with the inner peripheral surface of the pipe can be adjusted from a predetermined minimum diameter to a predetermined maximum diameter. Corresponding to the diameter of the pipe between the maximum and the minimum, it is possible to efficiently carry out the scraping and polishing work by the blades provided radially on the inner peripheral surface of the pipe.

In adjusting the contact radii of the plurality of cutter blade tips with the inner peripheral surface of the pipe in the above-mentioned cutter device, a link located between the outer link provided with the pantograph cutter blade and the cutter blade supporting base shaft. When moving the interlocking member connected to the middle part in the axial direction of the pipe from the front support, when the interlocking member is advanced toward the support, the link of the pantograph rises to increase the contact radius of the cutter blade edge (diameter of pipe). On the other hand, when retracted, the pantograph moves in the direction of laying down, and the contact radius of the cutter blade edge decreases (the pipe diameter size decreases), and the pipe diameter size can be made to correspond within a predetermined range.

Further, a winch installed above the vertical pipe is used to wind and advance a wire, which is directly or indirectly connected to the front support of the cutter device, between the polishing device and the cutter device connected to the front thereof. In order to drive the winch, the hose and the winding device in synchronization with each other by making the hose feeding speed of the hose winding device for supplying the polishing material to the polishing device and the wire winding speed of the winch the same, the vertical pipe and the pipe When cleaning the integrated elbow pipe for connecting the horizontal pipes connected to the lower end without separating it, the hose comes into contact with the inner curved part of the elbow pipe to deform and mix the abrasive and compressed air. Prevents obstruction of body passage. Further, when the portions of the supporting bodies before and after the polishing device and the cutter device which are in contact with the inner surface of the pipe are respectively biased in a radial direction by a sled body formed in an arc shape in the axial direction of the pipe, the cutter device is attached. The polishing device is supported by the front and rear supports, and can smoothly pass through the elbow pipe portion to polish the inner peripheral surface of the pipe.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a vertical drainage pipe including an elbow pipe at the lower end and a pipe mounting jig portion attached to the vertical drainage pipe when cleaning the drainage main pipe portion of a building using the pipe cleaning apparatus of the present invention. It is the side view which showed the outline as a section. P ₁ indicates the vertical pipe of the drainage main with a relatively large diameter to be cleaned,
It is installed vertically from F) up to 5 times (5F),
An elbow pipe P ₂ is connected to the lower end of the pipe for connection with a horizontal pipe (not shown) that is continuously provided (in the figure, the height ratio of 1F to 5F is shown small for convenience). This figure shows a state in which deposits such as rust and scale on the inner surface of the pipe are cleaned from the elbow pipe to the middle of the vertical pipe. In the vertical pipe P ₁ , there are provided a polishing device 1 provided with a nozzle 2 for discharging compressed air and an abrasive material, and a cutter device 7 provided in front of the same (upper in the figure) and provided with a cutter blade 10 in the outer peripheral direction. Vertical pipe P ₁
A power cord winding device with a wire that is a winch on a pipe device jig 25 having an exhaust hole 25a attached to the upper part
It is connected to the lower end of the wire 24 hung from 18 via a vertical television camera (VCT) 27. For the polishing apparatus 1, a mixed flow of compressed air and an abrasive is provided at the rear portion of the support 1b, and the compressed air passes from the compressor 19 through the pipe 20 and the hose winding device 17 to the abrasive in the middle of the pipe 20. The abrasive material 14 is mixed from the tank 15, so that the hose winding device 17 can supply the hose winding device 17 so that the hose 16 can supply the hose winding device 17.
The hose 16 is guided by the guide roller 12a of the pipe mounting jig 12 that is connected to the lower end of the elbow pipe P ₂ and is guided into the guide hole.
12b and a hole 13b of the blower deflection plate 13 described later are connected to each other.

A vertical television camera (VTC) 27 located in front of the polishing device 1 and the cutter device 7 connected in the front-rear direction (upward in the vertical pipe P ₁ ) elastically forms a sled body on the outer periphery. It is supported so that the part of the elbow pipe P ₂ can also pass smoothly in the axial direction of the pipe, and the forward and backward movements of the elbow pipe P ₂ can photograph and check the polished state of the inner peripheral surface of the pipe.

Further, the abrasive material 14 made of sand or the like contained in the abrasive material tank 15 includes the abrasive material in the tank 15 extending from the intermediate wall of the tank 15 to the discharge pipe portion below the tank wall. A heater 22 is provided to heat 14 and a heater 21 is provided to heat compressed air from the compressor 19 at a predetermined portion of the pipe 20 from the compressor 19 to the hose winding device. Sometimes the inner surface of the pipe is dried. In this case, it is desirable to heat the abrasive material at about 50 ° C. and the compressed air at about 60 ° C. in view of the durability of the hose 16.

Further, the above elbow pipe mounting jig 12
A fan heater 23 is mounted above the hose introduction side above the upper opening 12c. This fan heater
23 has a built-in heater 23a for heating the blast and is designed to blow air with the fan motor 23b at the top.
P _1, P is hitting the blowing into _2, the dry cleaning operation the original pipe inner surface, and - a hot air (80 ° during the polishing operation of the pipe inner surface according to the mixed flow of the abrasive and the compressed air 100
(° C.) And after finishing polishing, the heater 23a is de-energized and only air is blown. The direction of this blown air can be changed by a blower deflecting plate 13 installed obliquely below the upper opening 12c of the pipe mounting jig 12, and the elbow pipe
It rises inward of the vertical pipe P ₁ from P ₂ and is discharged into the atmosphere from the exhaust hole 25a of the side wall of the pipe mounting jig 25 on the upper side. Further, at this time, the winch 18 and the hose winding device 17 are connected by a power cord (not shown) via the wire 24, the vertical television camera 27, the cutter device 7, the polishing device 1, and the hose 16 to drive them synchronously. When the cutter device 7 and the polishing device 1 are raised in the pipe by the winch 18, the wire moving speed due to the winding of the winch 18 and the hose feeding speed of the hose winding device 17 are set to the same speed, and the elbow pipe during the cleaning operation is used. P ₂
The hose 16 is prevented from being contacted and deformed at the inner curved portion of the above, so that the mixture of the abrasive and the compressed air can be smoothly supplied to the polishing apparatus 1.

On the other hand, as the polishing work progresses, the adhered matter that has been dried and polished falls in the vertical pipe P ₁ and accumulates on the bottom surface of the pipe mounting jig 12 from the inner surface of the lower end of the elbow pipe P ₂ .
When the pipe mounting jig 12 is removed after finishing the polishing work, the dried dust 32 which is the adhered substance after polishing is removed. If the inside of the pipe is not dried by the fan heater 23, instead of the fan heater, a suction type dust collector may be connected to the upper opening 12c of the pipe mounting jig to suck the adhering substance that has fallen. Further, the attached matter may be sucked from the bottom surface of the pipe mounting jig 12.

Next, the polishing device 1 and the cutter device 7, which are the main parts of the device of the present invention, will be described in detail. 2 to FIG.
A schematic side view of the device in the pipe P ₁ shown in FIG. 2 (parts such as sleds located on the front axis are partially omitted)
And a partial sectional view thereof (for convenience, the pipe is shown in a horizontal position). Reference numeral 2 is a single nozzle for discharging compressed air and abrasive, which is provided so as to face the inner wall surface of the pipe P ₁ in a slightly oblique direction and rotate in the circumferential direction. The hollow rotary shaft 1a provided with the nozzle 2 is rotatably supported by the polishing apparatus support 1b, and
Supplied with mixed stream of the abrasive and the compressed air from the hose 16 which is connected to 1b the rear and of the hollow rotary shaft 1a front end, via a universal catch 5 ₁ front cutter 7 of (advancing direction) is adapted to be rotated are connected to the rear end of the cutter blade support base shaft ₇₁ driven by a motor in the front support member 7b. The flow path of the mixed flow is narrowed inside the hollow rotary shaft 1a, and the flow speed is increased to widen the rotation locus width from a rectangular opening having a long side along the axial direction of the pipe of the nozzle 2. It is designed to inject a mixed stream. The slightly inclined opening of the nozzle 2 with respect to the inner wall surface of the pipe is an opening toward the rotation direction side of the hollow rotation shaft 1a (clockwise direction side in FIG. 3), and when the hollow rotation shaft 1a rotates, the rotation direction ( A mixed flow of compressed air and abrasive is strongly blown to the inner wall surface of the pipe in the so-called reverse injection state from the opening of the nozzle 2 in the clockwise direction (see FIG. 3).

Further, the hollow rotary shaft 1a has a cutter 11 symmetrically sandwiching the single nozzle 2 and the hollow rotary shaft 1a.
Is a cutter arm 11 which is rotatably supported by the hollow rotary shaft 1a in an oblique direction toward the advancing direction and is urged outward (toward the inner peripheral surface of the pipe).
The cutter 11 is axially attached to the tip of the a, and the cutter 11 is a V-shape having a long side in contact with the wall surface of the pipe. On each side, cutter blades 11b are attached in two rows with their front ends slightly offset, The blade on the short side, which is not the wall surface of the pipe, scrapes off the front surface of the deposit. The cutter portion is provided with an appropriate weight so as to balance the rotation when the shaft is rotated, and the nozzle is uniformly rotated so as to remove the deposits by gripping the inner wall surface of the pipe.

The support 1b of the polishing apparatus, which rotatably supports the hollow rotary shaft 1a having the nozzle 2 and the cutter 11, has:
The circumference on the outer peripheral portion 4 equally divided sled body 4 ₁ a stereotactic member 4 Ke, spring 3 in the radial contact surface between the pipe inner surface respectively is formed in a circular arc shape in the axial direction of the pipe ₁
It is provided slidably in the axial direction of the pipe by pressing them against the inner surface of the pipe, and the axis of the hollow rotary shaft 1a is located on the axis of the pipe (P ₁ or P ₂ ). (See FIGS. 2 and 3). If the hollow rotary shaft 1a provided with the nozzle 2 and the cutter 11 is rotated by a motor attached to the support 1b, it is of course possible to carry out the polishing operation by the main polishing apparatus 1 alone. .

[0025] in front of the polishing apparatus 1 having the above nozzle 2 (advancing direction) of the cutter device 7 is connected via a universal catch 5 _1. The cutter unit 7, four links in each circumferential radially to the outer peripheral portion while being connected via a hollow rotation shaft 1a and the movable catch 5 ₁ of the polishing apparatus 1 is divided into four equal parts parallelogram a cutter portion having a cutting blade support base shaft ₇₁ which is attached to vary the contact radius of the pipe inner peripheral surface of the cutter blade 10 via a pantograph (parallel crank mechanism) to form a built-in motor located in front together allowed to rotate on the axis of the pipe through the cutter blade support base shaft ₇₁ to freely catch 5 ₇ Te, the contact radius of the pipe inner peripheral surface of the cutting edge of the cutter blade 10 is driven through the interlocking member 6 pantograph It is formed from an adjustable front support 7b. The front support 7b is the polishing device 1 described above.
Like the support 1b, the outer circumference is divided into four equal parts,
The sled body 4 ₇ is provided so as to be slidable in the axial direction of the pipe by forming a contact surface with the inner surface of the pipe in an arc shape in the axial direction of the pipe and biasing it radially with a spring 3 ₇ . . That is, the outer periphery of the cutter blade support base shaft ₇₁ which is driven through a universal catch 5 ₇ by the motor of the front support 7b, the base of the pantograph (parallel crank mechanism) circumference 4 equal portions in the radial direction The links 7 ₂ are provided in parallel to the axis of the support base shaft 7 ₁ , and the intermediate links 8 and
8 is attached, and the outer side link 9 is connected to the upper end thereof. Two cutter blades 10 are attached to the outer surface of each of the four outer side links 9 with two cutting edges parallel to the pipe axis with their front ends slightly offset. Further, at a position closer to the base link 7 ₂ of the front intermediate link 8, the ends of the coil spring 6 having a predetermined tensile force is interlocking member from the front support 7b is connected, the front end of the coil spring 6 The forward or backward movement is controlled by a motor or solenoid built in the front support 7b.When the coil spring 6 is moved forward (to the left in the figure), the link of the pantograph rises and the blade edge of the cutter rises. When the contact radius is increased and retracted, the pantograph falls to the rear and the contact radius of the cutter blade edge is reduced, so that it can be brought into contact with the inner surface of the pipe with appropriate pressure according to the mouth size of the pipe. Therefore, after presetting the contact radius of the cutter blade corresponding to the diameter size of the pipe, by rotating the cutter blade circumferentially, it is possible to satisfactorily scrape off the deposits on the inner peripheral surface of the pipe (see FIGS. 2 and 4). ).

In FIG. 2, the contact radius of the cutting edge of the cutter blade 10 provided radially of the cutter device 7 is set to a predetermined radius to scrape off the deposit 31 on the inner peripheral surface of the pipe P ₁ and connect it to the rear thereof. While the cutter 11 of the polishing device 1 scrapes off the uncut residue, the mixture of the abrasive and the compressed air is jetted widely from the nozzle 2 in the traveling direction and rotated forward to move the inner surface of the linear pipe P ₁ The state when polishing is shown. In this case, the front support 7b of the cutter device 7 and the support 1b of the polishing device 1 including the nozzle 2 are
In the respective supports the outer peripheral sleigh state of being movable in the pipe axial direction 4 _1, 4 ₇ portion in contact with both the pipe interior surface is formed in a circular arc shape in the axial direction of the pipe spring radially as the Because of being biased, when these devices 1 and 7 are pulled forward by the wire 24, the curved portion of the elbow pipe P ₂ connected to the lower portion of the vertical pipe P ₁ as shown in FIG. Of course, it is possible to polish the curved pipe portion connecting the horizontal pipes having different heights by passing through to the above and polishing with these devices.

FIG. 5 shows an example of cleaning the pipe P ₃ when the pipe diameter becomes smaller than that of the pipe P ₁ . In this case, the interlocking member 6 composed of a coil spring having a predetermined tensile force is moved rearward by a motor or a solenoid built in the front support 7b of the cutter device 7 so that the pantograph is slightly laid down and its outside link The outer peripheral diameter of the cutter blade 10 on the shaft 9 is reduced to accommodate the pipe P ₃ having a smaller diameter than the pipe P ₁ . At this time, since the cutter 11 on the opposite side of the nozzle 2 of the rear polishing device 1 is hingedly connected to the tip of the oblique cutter arm 11a which is biased outwardly, its blade edge portion is formed on the inner surface of the pipe. You can follow it completely and polish it well.

Next, an outline of pipe cleaning work using the apparatus of the present invention will be described. When integrally cleaning the vertical pipe P ₁ provided through the floor of the building as described above and the elbow pipe P ₂ connected to the lower end of the vertical pipe P ₁ , use a horizontal pipe previously connected to the elbow pipe P _2. After draining the water in the removed state, insert the front support 7b part of the cutter device 7 of this device and its front part into the elbow pipe P ₂ , and attach the pipe attached to the upper end of the vertical pipe P _1. After the wire 24 from the vertical television 27 in front of the cutter device 7 is wound from the power cord winding device with wire 18 which is a winch provided on the jig 25, the pipe mounting jig 12 is attached to the elbow pipe P2. Attach to. At this time, the cutter device 7 having the cutter blade 10 in the radial direction and the polishing device 1 having the nozzle 2 and the cutter 11 are in the mounting jig 12. After mounting of the pipe mounting jig 12, the pipe P ₁ through hot air of about 3 hours 80 ° ~ 100 ° C. driven to the fan heater 23 on the upper opening 12c of the jig 12 to the pipe P _1, the P _2, P ₂ Let the inner surface dry. Next, the abrasive material heating heater 22 and the compressed air heating heater 21 are energized to heat the abrasive material to about 50 ° C and the compressed air to about 60 ° C. After the work of drying the surface of rust and other deposits on the inner surface of the pipe, the compressor 19 is operated to supply the heated abrasive to the heated compressed air flow, and the nozzle 2 of the polishing apparatus 1, the cutter 11 and the radial direction of the cutter apparatus 7 are supplied. Rotate the cutter and drive the winch 18 to wire 24
The inner surface of the pipe is polished by advancing the take-up cutter and nozzle. During this polishing operation, the fan heater 23 continuously blows hot air into the pipe. As a result, deposits on the inner surface of the pipe, where only the rust humps and the surface are in a dry state and the inside is in a wet state, are scraped off by the cutters 10 and 11, and are widely ejected between the heated abrasive and compressed air. By the mixed flow, the nozzle progresses faster than before while being dried, and is polished in a shorter time. The ground dust in a dry state is prevented from adhering to the inner surface of the pipe, falls, and stays from the lower bottom surface of the elbow pipe P _{2 to} the bottom surface of the pipe mounting jig 12. After the polishing work is completed, the accumulated dust 32 is removed from the elbow pipe portion when the pipe mounting jig 12 is removed, and the cleaning work is completed. In this way, the vertical pipe and the elbow pipe can be efficiently cleaned in a short time by shortening the polishing time.

In the embodiment, a cutter device 7 having a cutter radially and a polishing device 1 having this one cutter symmetrically connected to the nozzle are connected to each other, and the portions of the respective supports which contact the inner surface of the pipe are connected. The case where the vertical pipe and the elbow pipe connected to the lower end of the pipe are efficiently cleaned integrally by using the sled body formed in the arc direction of the pipe has been described. When the cleaned pipe is cleaned, the cutter device 7 is omitted and only the polishing device in which the nozzle is driven by the motor in the support body is used, but the elongated opening along the axial direction of the pipe is provided. By rotating the nozzle, it is of course possible to shorten the polishing time as compared with a conventional polishing apparatus of this type that uses a mixed flow of an abrasive and compressed air. A.

[0030]

According to the pipe cleaning apparatus of the present invention as set forth in claim 1, when a pipe (particularly a large diameter pipe) is cleaned, it has an elongated opening having a long side along the axial direction of the pipe. Since the polishing device is moved forward while rotating the nozzle, the polishing area per rotation of the nozzle is increased, and even if the number of polishing is reduced, the polishing surface is not uneven and the polishing work time can be shortened.

According to the second aspect of the present invention, there is provided a cleaning device for a pipe according to the present invention, wherein a cutter blade supporting base shaft is connected to the front of a polishing device having a nozzle whose tip opening is directed to the inner surface of the pipe rotatably, through a universal joint. The radial cutter blade of the cutter device is provided so that the contact radius with the inner surface of the pipe can be adjusted from a predetermined minimum diameter to a predetermined maximum diameter by using a pantograph in which four links form a parallelogram. Since it is rotated by the motor attached to the support, it is possible to scrape off the deposits on the inner peripheral surface of the pipe up to a certain range of diameters that was not possible with the specified diameter according to the diameter, which was previously impossible. Polishing work can be performed.

According to the third aspect of the present invention, the contact radius of the blade tip of the cutter blade on the link of the cutter device with the inner peripheral surface of the pipe can be easily adjusted.

According to the fourth aspect of the present invention, when integrally cleaning the vertical pipe and the elbow pipe connected to the lower end of the vertical pipe, the mixed flow of the abrasive and the compressed air to the nozzle of the polishing apparatus is applied. The hose to be passed is prevented from being contact-deformed with the curved portion inside the elbow pipe, and the mixed flow can be satisfactorily passed to perform polishing work, and a cutter device and a nozzle equipped with a cutter blade radially are provided. It is possible to smoothly pass the elbow pipe portions of both the polishing devices without any trouble so that the polishing of the portions can be performed smoothly.

[Brief description of drawings]

FIG. 1 is a perspective view of a pipe cleaning device according to the present invention.
A side view schematically showing in partial cross-section a state in which a vertical pipe of a drainage main of a building and an elbow pipe portion connected to a lower end thereof are integrally cleaned,

2 is a schematic side view showing, in a horizontal state, a polishing device and a cutter device, which are main parts of the device of the present invention, in the vertical pipe shown in FIG. 1;

3 is a sectional view taken along line AA of FIG.

4 is a cross-sectional view taken along the line BB showing only the cutter device portion of FIG.

FIG. 5 is a schematic side view showing an example when the pipe diameter in FIG. 2 is reduced.

[Explanation of symbols]

1-polishing device, 1a-hollow rotating shaft, 1b-polishing device support, 2-compressed air and abrasive material discharge nozzles, 4 ₁ , 4 ₇
─ Sled, 5 ₁ , 5 ₇ ─ Flexible joint, 6 ─ Interlocking member, 7
─ Cutter device, 7 ₁ ─ Cutter blade support base, 7b ─ Cutter device support, 8 ─ Intermediate link, 9 ─ Outside link, 10 ─ Cutter blade, 11 ─ Cutter, 11a ─ Cutter arm, 12 ─ Elbow pipe mounting cure Ingredient, 14─
Abrasive material, 15-Abrasive material tank, 16-Hose, 17-Hose winding device, 18-Winch, 19-Compressor, 20
─ Piping, 21 ─ Compressed air heating heater, 22 ─ Abrasive heating heater, 23 ─ Fan heater, 24 ─ Wire, 25 ─ Vertical pipe mounting jig, 27 ─ Vertical TV camera, 31 ─ Adherent, P ₁ ─ Vertical Pipe, P ₂ -Elbow Pipe.

Claims (4)

[Claims] Claim: What is claimed is: 1. A pipe having means for passing compressed air into the pipe and means for supplying an abrasive to the flow of the compressed air, the support being movable at least in the pipe axial direction of the pipe. A pipe cleaning device having a polishing device which is rotatably supported around an axis and whose tip opening is directed to the inner surface of the pipe to eject compressed air containing abrasives and to rotate the nozzle. The nozzle opening is formed as an elongated opening having a long side along the axial direction of the pipe. 2. A pipe axis is provided on a support which is provided with a means for passing compressed air into the pipe and a means for supplying an abrasive to the flow of the compressed air, the support being movable in the pipe axial direction. A polishing device, which is rotatably supported around and has its tip opening portion ejecting compressed air containing an abrasive from a nozzle directed toward the inner surface of the pipe, is connected through a universal joint in the forward direction of the polishing device. The cutter blade is connected to the rear part of the front support that can move in the axial direction of the pipe rotatably on the axis of the pipe through the universal joint. The cutting edge can adjust the contact radius with the inner peripheral surface of the pipe from a predetermined minimum diameter to a predetermined maximum diameter.
A cutter device attached via a pantograph in which two links form a parallelogram is formed as if driven by a motor attached to one of the front and rear supports, and the polishing device and the cutter device are connected to each other by a pipe. A pipe cleaning device comprising means for advancing inside. 3. The adjustment of the contact radii of a plurality of cutter blade tips with the inner surface of the pipe in the cutter device is performed between an outer side link provided with a pietagraph cutter blade and a cutter blade supporting base shaft, and each end thereof is positioned. 3. The pipe cleaning apparatus according to claim 2, wherein an interlocking member connected to an intermediate portion of a link whose portion is axially mounted is moved in the axial direction of the pipe from the front support member. 4. A means for advancing the polishing device and the cutter device in a pipe comprises at least a wire coupled to a front support of the cutter device and a winch installed above the vertical pipe for winding the wire. The hose winding device drives the drum for the hose wound with the hose for supplying the polishing material to the polishing device, and the wire winding speed of the winch is the same as that of the winch. While simultaneously driving the take-up device, the portions of the front and rear supports of the polishing device and the cutter device that contact the inner surface of the pipe respectively urge the sled body formed in an arc shape in the axial direction of the pipe in the radial direction. It is characterized in that the vertical pipe and the elbow pipe for connecting the horizontal pipe connected to the lower end of the pipe are integrally cleaned. Pipe cleaning device according to claim 2.