JPH0743259Y2 - Equipment for removing deposits in pipes - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a removing device for removing deposits in a pipe such as a sewer pipe.

[0002]

2. Description of the Related Art For example, domestic wastewater discharged from each household flows into a pipe buried in the ground as a sewer pipe. The domestic wastewater discharged from each household as described above contains various kinds of filth, and these filths may settle on the bottom of the pipe and hinder the smooth flow of the wastewater. Therefore, it is necessary to perform maintenance such as cleaning the inside of the pipe so that the flow of the sewer pipe is not obstructed by the sediment of such waste.

However, it is not always the case that the various wastes discharged from each home obstruct the flow of domestic wastewater discharged from each home. Over a long period of time, the packing of the joint part may stick out of the seal part and hang down inside the pipe due to a pipe misalignment or a construction error at the time of installation, which may cause clogging. In addition, concrete washing water flowing out from the work site may be accumulated and hardened on the bottom of the pipe for a long time, which may cause clogging. Also, if the piping connected to the sewer pipe water is protruding into the sewer pipe, or if roots of trees such as street trees or flower beds enter the inside of the piping through the gaps or cracks in the joints, this also causes clogging. Sometimes.

As a means for removing the cause of the clogging inside the pipes, a water jet method has been conventionally used, and a method of removing high-pressure water into the inside of the pipes is known. However, in such a water jet method using high-pressure water, the water leaks from the seal part of the packing of the joint part, the concrete wash that has accumulated and solidified at the bottom of the pipe, and the inside of the sewer pipe connected to the sewer pipe. There was a problem that it was not possible to remove things such as the protrusion of trees and the invasion of roots of plants.

Therefore, recently, a TV camera is mounted on a self-propelled vehicle, various attachments can be attached to the tip of the self-propelled vehicle, and a crushing breaker and a digging lever are provided depending on the cause of clogging inside the pipe. , A packing cutting device, a root cutting device, and the like have been developed, and a device for removing deposits and the like in pipes has been developed by appropriately changing the attachments. However,
In the above-mentioned device for removing deposits in pipes, the cause of clogging in the pipes should be investigated using a camera, etc., and various attachments should be replaced as appropriate according to the cause of clogging, and the work must be performed There was a problem of requiring labor.

[0006] Therefore, the applicant of the present invention has already disclosed 3-360.
Japanese Patent Publication No. 83 discloses a removing device capable of removing deposits and the like in pipes with one removing device regardless of the type of the cause of clogging. That is, the technique disclosed in Japanese Utility Model Laid-Open No. 3-36083 has a cutting part that has a plurality of blades at the front part and rotates to cut deposits in a pipe or the like, and a drive part that rotates the cutting part at the rear part. It is composed of a deposit cutting mechanism and a moving mechanism for moving the deposit cutting mechanism.

The moving mechanism is provided with a cylinder having one end fixed to a rear portion of the cutting mechanism for deposits and the like, and a cylinder that expands and contracts in the moving direction, and is provided on the other end of the cutting mechanism for deposits and the cylinder, respectively, on the same circumference. Therefore, it is composed of a plurality of movable fixed bodies that move in the direction of centrifuging in synchronism with each other and have three or more pressing legs that come into pressure contact with and separate from the inner wall of the pipe. In the removing device of Japanese Utility Model Laid-Open No. 3-36083 configured as described above, the rotation of the blade of the cutting portion of the cutting mechanism and the forward / backward movement of the moving mechanism cause a clogging (accumulation or sticking of obstacles in the pipe) in the pipe by one device. object)
Is cut and crushed, and the crushed product is washed away by the waste water flowing in the pipe.

[0008]

However, according to the above conventional technique, it has been found that there are the following problems. For pipes buried underground, due to construction errors, differences in density of the ground, disasters such as earthquakes,
The individual pipes are tilted, a step as shown in FIG. 10Z is formed at the joint T of the joint between the pipe 100 and the pipe 200, and the fixed blade removing device 3 of Japanese Utility Model Laid-Open No. 3-36083 is disclosed.
In No. 00, there was a risk that the pipe could not enter the next pipe by hitting the step Z, or the wall thickness of the pipe might be cut off when the blade was rotated.

The problem to be solved by the present invention is that in a device for removing deposits and the like in a pipe, if there is a step at a joint in the course of advancing in the pipe, the step can easily be overcome and penetrate into the next pipe. Is.

[0010]

In order to solve the above problems, according to the present invention, a front part has a plurality of blades and has a cutting part that rotates to cut deposits in a pipe, and a rear part. In a device for removing deposits and the like in a pipe, which comprises a deposit cutting mechanism having a drive unit for rotating the cutting unit and a moving mechanism for moving the deposit cutting mechanism, the outer diameter of the cutting unit is set to the inner diameter of the target pipe. The diameter is made slightly smaller, and a mechanism is provided to allow a plurality of blades to move back and forth in the centrifuging direction of the cutting portion.

It is preferable that the mechanism capable of advancing and retracting is a cylinder and a piston rod.

[0012]

[Function] When a device for removing deposits, etc. in a pipe is placed in the pipe and moved by the moving mechanism, a place where there is no deposit, etc.
The blade is set back by a mechanism that allows the blade to move forward and backward.
In particular, when there is a step at the joint of the pipes, it is possible to prevent the blade from coming into contact with the step by moving the blade back, so that the step can be easily overcome. When there is a deposit or the like, the cutting portion is rotated, the blade is moved forward to perform cutting, and the deposit or the like is crushed.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show an embodiment of a device for removing deposits in a pipe according to the present invention. First, a first embodiment will be described with reference to FIGS. In the figure, 1 is a pipe deposit removing device, and 1 is a deposit cutting mechanism 2
And a moving mechanism 3. The deposit cutting mechanism 2 has a cutting portion 4. Reference numeral 5 denotes a rotary cylinder formed in a tubular shape. Blades 6 are attached to the tip of the rotary cylinder at three positions at equal intervals along the circumferential direction, and a rotary plate 7 is fixed to the rear end of the rotary cylinder. The rotary plate 7 is fixed to a rotary shaft 8, and the rotary shaft 8 is fitted and fixed to a rotary support 11 of a hydraulic motor 10. Further, the rotary plate 7 is provided with a plurality of holes, and these holes are for passing the liquid flowing in the pipe.

The cutting section 4 is composed of a rotary cylinder 5, a blade 6 supported by a cutting body 54, a rotary plate 7 and a rotary shaft 8. The cutting portion 4 is rotatably supported by a support mechanism 13. Reference numeral 14 is a cylindrical cover fitted to the outside of the rotary shaft 8 to support the rotary shaft 8 via bearings and to cover the entire rotary shaft 8. The cover 14 is fixed to the movable fixed body 15. The support mechanism 13 includes a rotary support 11 of the hydraulic motor 10 and a cover 14. The cutting unit 4 and the support mechanism 13 are the moving mechanism 3
Is configured to move by. The moving mechanism 3 is composed of four moving fixed bodies 15, 16, 17, and 18.

The movable fixed body 15 is fixed to the cover 14 with screws or the like. Reference numeral 19 denotes a leg of the movable fixed body 15 which expands and contracts by hydraulic pressure. A plurality of legs 19 are provided, and the legs 19 are configured to expand and contract simultaneously in the radial direction by hydraulic pressure. That is, the leg 19 is moved in the centrifuging direction and is pressed against and separated from the inner wall of the pipe. By extending the leg 19, the inner wall of the pipe is pressed to fix the support mechanism 13. A ring-shaped elastic member 20 is suspended on the outer peripheral surface of the leg 19. The ring-shaped elastic member 20 is for preventing the leg 19 from damaging the pipe inner wall when the leg 19 extends and presses the pipe inner wall.

The movable fixed body 16 is slidably fitted on the outside of the cover 14. Reference numeral 21 denotes a leg of the movable fixed body 16 that expands and contracts by hydraulic pressure. A plurality of legs 21 are provided and are configured to simultaneously expand and contract in a radial direction by hydraulic pressure. That is, this leg 21 expands and contracts (moves in the centrifugal direction) by press-fitting oil into the oil chamber 21a, and press-contacts the inner wall of the pipe. Further, when the oil is pressed into the oil chamber 21b, the oil is contracted (moved in the centripetal direction) and separated from the inner wall of the pipe. Therefore, by extending the leg 21, the inner wall of the pipe is pressed to fix the support mechanism 13. A ring-shaped elastic member 22 is suspended on the outer peripheral surface of the leg 21. The ring-shaped elastic member 22 is for preventing the leg 21 from damaging the pipe inner wall when the leg 21 extends and presses the pipe inner wall.

The movable fixed body 17 is fixed to the other end of a fixed rod 23 whose one end is fixed to the movable fixed body 15. Between the movable fixed body 17 and the movable fixed body 15,
A hydraulic motor 10 and a collar 12 are provided. The movable fixed body 17 is also provided with a plurality of legs that expand and contract by hydraulic pressure and a ring-shaped elastic member 25.

A piston rod 27 of a hydraulic cylinder 26 that expands and contracts in the moving direction is fixed to the movable fixed body 17. The hydraulic cylinder 26 is fixed to the movable fixed body 18. In this hydraulic cylinder 26, the oil chamber 2
By injecting oil into 6a, the piston rod 27 moves in the direction shown by arrow C in FIG. By injecting oil into the oil chamber 26b, the piston rod 27 moves in the direction shown by arrow E in FIG. The movable fixed body 18 is also provided with a plurality of legs 28 that expand and contract by hydraulic pressure and a ring-shaped elastic member 29.

The movable fixed body 18 and the movable fixed body 16 are fixed to each other by a shaft 30. The shaft 30 is slidably fitted to the movable fixed body 17 and the movable fixed body 15. Therefore, the shaft 30 also functions as a rotation stopper that fixes the support mechanism 13 so as not to rotate when the rotary support 11 of the hydraulic motor 10 is rotated to rotate the rotary cylinder 5. Therefore, when the piston rod 27 moves in the direction indicated by the arrow C in FIG. 1 by driving the hydraulic cylinder 26 and injecting oil into the oil chamber 26a, the moving fixed body 16 moves in the direction indicated by the arrow D in FIG. Moving. Further, when the piston rod 27 moves in the direction shown by the arrow E in FIG. 1 by injecting oil into the oil chamber 26b, the moving fixed body 16 is moved by the shaft 30 as shown in FIG.
Move in the directions indicated by arrow F.

The hydraulic motor 10 and the movable fixed bodies 15, 1
6, 17, 18 and the hydraulic circuit for the oil that is pressure-fed to the hydraulic cylinder 26 are separate systems. The outer diameter of the rotary cylinder 5 of the cutting unit 4 of the device 1 for removing deposits in a pipe of the present invention is set to be slightly smaller than the inner diameter of the target pipe.
As shown in FIGS. 1 to 4, a cylinder 50 is provided in the rotary cylinder 5. A piston rod 52 in which a compression coil spring 51 is wound is provided in an oil chamber 50a in the cylinder 50, and a cutting body 54 having a blade 6 is attached to the tip of the piston rod 52 so that the piston rod 52 can advance and retreat in the centrifugal direction. Has become. The oil press-fitted into the cylinder 50 passes through the nipple 53 and the passage in the collar 12 from the rear part of the device,
The oil chamber 50 in the cylinder 50 passes through a passage bored at the center of the rotary support 11 extending to both ends of the hydraulic motor 10 and through the center of the rotary shaft 8 and a radial passage on the front side of the rotary shaft 8.
It is introduced in a. The hydraulic circuit for moving the blade 6 back and forth is
It is preferable that the hydraulic circuit is the same as the hydraulic circuit of the hydraulic motor 10 that rotates the motor or is provided so as to be synchronized. In the embodiment, three cutting bodies 54 are provided at equal angles on the circumference, but the number may be changed appropriately.

Next, the operation of this embodiment will be described.
The hydraulic motor 10 is driven to rotate the rotary support 11 of the hydraulic motor 10 to rotate the rotary cylinder 5. At the same time, oil is introduced into the oil chamber 50a of the cylinder 50 through the passage of the nipple 53, the rotary support 11, and the rotary shaft 8, and the cutting body 5
The blade 6 of 4 is moved forward in the centrifugal direction. By the rotation of the rotary cylinder 5, the obstacle attached to the inner wall surface of the pipe is cut by the blade 6 and crushed. Since the hydraulic circuit for driving the hydraulic motor 10 can be driven independently of the hydraulic circuit for driving the cylinder 26 for moving the movable fixed bodies 15, 16, 17, 18, 18, the movable fixed body 15, 1
The drive control can be performed regardless of the drive state of the hydraulic circuit that drives 6, 17, and 18.

The blade 6 is moved back and forth as follows.
By injecting oil into the oil chamber 50a, the piston rod 52 advances in the radial direction, and the blade 6 of the cutting body 54 projects toward the inner wall side of the pipe (FIG. 3). On the other hand, when the oil in the oil chamber 50a is drained, the elastic force of the compression coil spring 51 causes the piston rod 52 to retract and the blade 6 of the cutting body 54 to retract as well. Therefore, if there is a deposit or the like in the pipe, the blade 6 of the cutting body 54, which is attached to the rotary cylinder 5 so as to be movable back and forth, rotates by the rotation of the hydraulic motor 10 to cut and crush the deposit and the like. When the deposits and the like are removed, the oil in the oil chamber 50a of the cylinder 50 is drained. As a result, the blade 6 of the cutting body 54 retracts as the piston rod 52 retracts, receiving the restoring force of the compression coil spring 51. In particular, the function of the blade 6 to move back and forth is suitable for overcoming the step of the seam that occurs in the joint portion of the pipes. If there is a deposit or the like at the seam, it is sufficient to control the forward feed amount in the centrifugal direction. For example, the pressure of oil may be adjusted.

The moving mechanism 3 moves the device 1 for removing deposits and the like in the pipe. That is, first, in the state shown in FIG. 9A, the legs 21 of the movable fixed body 16 are extended (moved in the centrifugal direction) by press-fitting oil into the oil chamber 21a of FIG.
Then, the movable fixed body 16 is fixed by being pressed against the inner wall of the pipe. In synchronization with the extension of the legs 21 of the movable fixed body 16, the legs 28 of the movable fixed body 18 are simultaneously extended (moved in the centrifugal direction) to fix the movable fixed body 18.

At this time, the movable fixed bodies 16 and 18 move from the contracted state of the legs 21 and 28 to the leg 2 with respect to the pipe.
When 1, 2 are extended, tension is applied to the ring-shaped elastic members 22, 29 suspended on the outer peripheral surfaces of the legs 21, 28, and the legs 21, 28 of the ring-shaped elastic members 22, 29 are stretched.
The portion pressed by is crimped to the inner wall of the pipe. In this way, the device 1 for removing deposits in the pipe is fixed in the pipe. At this time, the movable fixed bodies 15 and 17 are not in contact with the inner wall of the pipe.

In this state, the cylinder 26 is driven by injecting oil into the oil chamber 26a of FIG.
When moving in the direction indicated by arrow C, the state shown in FIG. That is, the movable fixed body 1 is moved by the cylinder 26.
5 and 17 move. When the movable fixed bodies 15 and 17 move, the rotary cylinder 5 moves forward and backward.

Next, a second embodiment will be described with reference to FIGS. The second embodiment also has a rotating mechanism and a moving mechanism similar to those of the first embodiment, so the detailed description thereof will be omitted. The rotary cylinder 5a of the second embodiment is also set to be slightly smaller than the inner diameter of the target pipe, and the rotary cylinder 5a is provided with a pin body 63. The pin body 63 has a cutting body 54a having a blade 6a on its outer periphery. It is pivotally supported so that it can move back and forth by rotating in the same direction. Reference numeral 60 denotes a spiral spring that constantly biases the cutting body 54a in the backward direction. Reference numeral 61 is a stopper for the forward and backward limits.

With this structure, when the rotary cylinder 5a is rotated by the hydraulic motor 10 in the direction of arrow X in FIG. 8, centrifugal force acts on the cutting body 54a, and as shown by arrow Y in FIG.
a rotates against the resilience of the spiral spring 60 and moves forward,
It projects to the outer periphery of the rotary cylinder 5a and contacts the stopper 61.
The projecting blade 54a of the cutting body 54a cuts and grinds deposits and the like in the pipe. When the rotation of the rotary cylinder 5a is stopped, the cutting body 54a is biased by the spiral spring 60 and rotates to retreat.

[0028]

As described above, according to the present invention, the outer diameter of the rotary cylinder of the cutting portion is made slightly smaller than the inner diameter of the target pipe, and a plurality of blades are movable in the centrifugal direction of the rotary cylinder. Since the above is provided, there is an effect that when the joint portion of the pipe enters the joint, the blade can be retracted so that the step can be easily overcome and the pipe can be easily moved to the next pipe. .

[Brief description of drawings]

FIG. 1 is a partially omitted sectional front view showing a first embodiment of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a cross-sectional view of a cutting portion with a blade advanced in a first embodiment.

FIG. 4 is a right side view of the state of FIG.

FIG. 5 is a sectional view of a cutting portion according to a second embodiment of the present invention.

FIG. 6 is a right side view of FIG.

FIG. 7 is a cross-sectional view of a cutting portion with a blade advanced in a second embodiment.

FIG. 8 is a right side view of the state shown in FIG.

9 (A) and 9 (B) are operation explanatory views for explaining movement by the movable fixed body.

FIG. 10 is an explanatory diagram illustrating a relationship between a conventional device for removing deposits in a pipe and a step formed at a joint between pipe joints.

[Explanation of symbols]

1 ……………………………………………………………… Pipe deposit removal device 2 …………………………………………………… ……… Cutting mechanism for deposits 3 ………………………………………………………… Movement mechanism 4 ……………………………………………… ……………… Cutting part 5 ………………………………………………………… Rotary cylinder 6,6a …………………………………… …………… Blade 50 ……………………………………………………… Cylinder 50a …………………………………………………… Oil chamber 51 ………………………………………………………… Compression coil spring 52 ………………………………………………………… Piston rod 54, 54a ……………………………………………… Cutting body 60 ………………………………………………………… Without the coil spring 61 ............................................................... stopper 63 ............................................................... pin body

Claims (2)

[Scope of utility model registration request] 1. A mechanism for cutting deposits and the like, which has a cutting part having a plurality of blades in a front part for rotating to cut the deposits in a pipe and the like, and a drive part for rotating the cutting part in a rear part, In a device for removing deposits, etc. in pipes that consists of a moving mechanism that moves the cutting mechanism for deposits, etc., the outer diameter of the cutting part is made slightly smaller than the inner diameter of the target pipe, and a plurality of blades are installed in the centrifugal direction of the cutting part. An apparatus for removing deposits and the like in pipes, which is provided with a mechanism that can move back and forth. 2. The removing device for deposits and the like in pipes according to claim 1, wherein the mechanism capable of advancing and retracting is a cylinder and a piston rod.