JPH0441991Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a pipe cleaning device that is applied to cleaning the inside of a sewer pipe or the like.

Prior Art and Its Problems When applying internal lining to a sewer pipe, it is necessary to clean the inside of the pipe before lining the pipe and remove various obstacles that may obstruct lining formation from inside the pipe. As shown schematically in Figure 12, such obstacles include soft deposits such as mud (a), hard deposits such as mortar (b), tree roots, rubber packing and other objects that enter the joints (c), and The protrusion d of the pipe, the step e of the joint, etc. can be shown.

Conventionally, the inside of a sewer pipe has generally been cleaned by applying a water jet, but the method using a water jet can only remove soft deposits a, and is hardly effective in removing other obstructions. Therefore, it is necessary to repeatedly clean the inside of the pipe using various cutting devices and cutting devices, which makes the work inefficient, requires the preparation of many types of devices, and increases equipment costs. There were some problems, such as sticking.

The present invention has been made with the aim of eliminating these conventional problems.

Means to Solve the Problems In this invention, a cart that is moved within a pipe under remote control is equipped with a movable body at the front and a fixed body at the rear, and the movable body is capable of expanding and contracting in the radial direction of the pipe. The present invention relates to a pipe cleaning device characterized in that it is equipped with a cylindrical cutter that is pressed into contact with the inner surface of the pipe when expanded, and a mechanism for changing the expansion and contraction of the cylindrical cutter.

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

As is clear from the general views schematically shown in FIGS. 1 and 2, the device of the present invention moves a cart 1 installed in a sewer pipe A in the direction of the pipe axis under remote control. Equipped with

The trolley 1 has a movable trunk 1a at the front and a fixed trunk 1b at the rear.
It is supported at the center within the pipe A by a pair of crawler-type self-propelled traveling sections 2a and 2b. The above running parts 2a, 2b
is biased by a spring (not shown).
The fixed body portion 1b is pressed against the inner surface of the tube A, and the fixed body portion 1b is prevented from rotating within the tube A by friction with the inner surface of the tube A. As the rotation prevention means, various known rotation prevention means can be employed. A disk-shaped swath bar 6 made of, for example, rubber is provided at the front end of the fixed body portion 1b and is pressed against the inner peripheral surface of the tube A at its outer peripheral edge.

The movable body portion 1a of the truck 1 includes a cylindrical cutter 3 which is expandable and contractible in the radial direction of the tube and is pressed against the inner surface of the tube when expanded; The wire brush 4 is connected to the movable body portion 1a.
It is equipped to rotate together with the

The cylindrical cutter 3 is equally divided into a plurality of parts, for example, six parts, and can be changed from a contracted state (see FIG. 1) to an expanded state (second state) by opening and closing between each divided part 3a.
(see figure), or vice versa, as appropriate.

As shown in FIG. 3, the wire brush 4 is wheel-shaped and has parts, for example, three parts.
An opening 4a having an opening width of about 20° is formed,
An injection nozzle 5 for injecting water jet from the opening 4a to the inner surface of the tube in front thereof,
It is provided at the rear of the movable body portion 1a.

The details of the truck 1 are shown in FIGS. 4 and 6, and the fixed body portion 1b is fitted and fixed onto the central fixed shaft 1c at the center of the rear end portion. On the other hand, movable body part 1
A is fitted into the fixed body portion 1b in a mating manner at its rear portion, and is freely fitted into the central through hole _1a1 on the fixed shaft 1c.
A drive device 7 is provided at the rear end of the fixed body portion 1b, and the rotation of the drive device 7 is transmitted to the movable body portion 1a via a gear transmission mechanism 7a. The structure is such that the cylindrical cutter 3, wire brush 4, and injection nozzle 5 are rotated in a direction around the central axis of the tube A.

The cylindrical cutter 3 is divided into six parts, for example, as shown in FIGS. 5 and 7, in order to be able to expand and contract in the tube radial direction.
At the fitting part of the support ring 8 at the tip, a protrusion 9a extending in the pipe radial direction at the center of the back surface and a concave groove 9b (see FIG. 8) extending in the pipe radial direction on the front surface of the ring 8, the pipe radius is adjusted. It is supported so that it can move in the direction. As shown in FIGS. 9 and 10, the groove 9b
has a shape that widens at the back with a narrowed entrance part, into which a protrusion 9a of the same shape is fitted, and in this fitting part, the divided part 3a is integrally attached to the support ring 8 in the tube axis direction. Supported.

The trolley 1 is equipped with a switching mechanism 10 for appropriately switching the cylindrical cutter 3 from the contracted state shown in FIG. 4 to the expanded state shown in FIG. 6, or vice versa.

As shown in FIGS. 4 and 6, the switching mechanism 10 is freely fitted onto the fixed shaft 1c and is placed in a cylinder 11a provided inside the front part of the movable body 1a. It is equipped with a piston rod 11b that moves forward and backward along the axis 1c by fluid control,
A truncated conical guide head 12 is fixed at the tip of the rod 11b. The guide head 12 has six guide heads arranged at 60° intervals extending in the tube axis direction on the outer peripheral surface.
It has an inclined guide groove 13 with a narrow entrance and a widening shape.
The guide protrusion 14 at the lower end of a is engaged in a state in which it is prevented from coming out in the pipe radial direction, and as the guide head 12 moves forward and backward, the guide protrusion 14 and thus the divided part 3a are reciprocated in the pipe radial direction. Cylindrical cutter 3
is expanded or contracted as the divided portion 3a moves back and forth.

Expanding and contracting operations of the cylindrical cutter 3 will be explained based on the drawings. When the guide head 12 is in the retracted position as shown in FIG. 4, the guide protrusion 14 moves into the inclined guide groove as shown in FIG. The protrusion 9a and the divided portion 3a integral with the protrusion 9a are kept moved toward the center fixed shaft 1c, and the cylindrical cutter 3 is shown in FIGS. 4 and 5. It is kept in a reduced state as shown.

When the piston rod 11b is operated to move the guide head 12 forward in the state shown in FIGS.
4 moves in the inclined guide groove 13 from the lower end side to the higher end side as shown in FIG. As shown in Figures 6 and 7,
The cylindrical cutter 3 is expanded and pressed against the inner surface of the tube A at the cutter portion 3b (see FIGS. 1 and 2) on its outer circumferential surface.

From the state shown in FIGS. 6 and 7, by operating the piston rod 11b and retracting the guide head 12, the cylindrical cutter 3 is moved again to the fourth to fourth positions.
It is possible to return to the reduced state shown in FIG.

As shown in Fig. 1, the cleaning device of the present invention is installed in a pipe A with a cylindrical cutter 3 in a reduced state, and a movable body 1a, and a wire brush and a cylindrical cutter 3 installed on the movable body 1a. 4 and the injection nozzle 5 are rotated within the tube A. During this movement inside the pipe, the wire brush 4 serves to scrape off relatively soft deposits a from the inner surface of the pipe A, and the scraping performance of the wire brush 4 is as follows: Further improvement can be achieved by spraying waterjet on the inner surface of the front tube A and cleaning it prior to scraping.

While moving inside the pipe, by applying conventional means such as a television camera installed inside the pipe, hard deposits such as mortar (b), intruding objects such as tree roots (c), and protrusions of attached pipes (d)
If the presence of an obstacle such as a step e at the joint (see Fig. 12) is confirmed, the movement of the carriage 1 is stopped while the movable body 1a continues to rotate at that position, and the rear cylinder is By expanding the shaped cutter 3 in the radial direction of the tube A as shown in FIG. 2 and rotatingly pressing it against the obstacle to be removed, the obstacle can be removed by grinding or cutting. After the obstructions have been removed from the inner surface of the tube, the cylindrical cutter 3 is returned to the reduced state shown in FIG. .

In this way, all obstacles can be removed from the inner surface of the pipe A by repeatedly moving and stopping the cart 1 within the pipe, and further changing the expansion and contraction of the cylindrical cutter 3 at the movement stop position.

The wire brush 4 removes the material removed from the inner surface of the tube by operating the wire brush 4 and the cylindrical cutter 3.
Subsequently, it is carried out in the moving direction by the swath bar 6 that moves inside the pipe, and is finally swept away from the inside of the pipe, thereby achieving the purpose of cleaning the inside of the pipe.

Effects As described above, in the cleaning device of the present invention,
Scraping performance with wire brush 4 and cylindrical cutter 3
The grinding and cutting performance of the swat bar 6 combined with the sweeping performance of the swatz bar 6 allows for the ability to clear out various types of hard and soft pipe obstructions in a single process, making it possible to efficiently clean the pipe interior using one type of equipment. .

[Brief explanation of the drawing]

Fig. 1 is an overall view of the cylindrical cutter when it is contracted, showing an embodiment of the present invention and the state of the device inside the pipe, Fig. 2 is an overall view of the same cylindrical cutter when it is expanded, and Fig. 3 shows how the wire brush is installed. FIG. 4 is a vertical sectional view of the cylindrical cutter in a reduced state showing details of the expansion/retraction switching mechanism, FIG. 5 is a front view of FIG. 4, and FIG. 6 is an expanded state corresponding to FIG. 4. FIG. 7 is a front view of FIG. 6, FIG. 8 is a front view of the support ring, FIGS. 9 and 10 are explanatory diagrams of the operation of the expansion/contraction switching mechanism,
FIG. 11 is an exploded view thereof, and FIG. 12 is an explanatory diagram showing a specific example of an obstruction in a sewer pipe. In the figure, 1 is the trolley, 1a is its movable body, 1
b is a fixed body part, 2a is a running part, 3 is a cylindrical cutter,
4 is a wire brush, 5 is an injection nozzle, 6 is a swat bar, 7 is a drive device, 8 is a support ring, 9a is a protrusion, 9b is a groove, 10 is an expansion/contraction switching mechanism, 11a
11b is a cylinder, 11b is a piston rod, 12 is a guide head, 13 is an inclined guide groove, and 14 is a guide protrusion.

Claims (1)

[Scope of utility model registration request] A trolley that is moved within a pipe under remote control is equipped with a movable body at the front and a fixed body at the rear.
A pipe cleaning device comprising: a cylindrical cutter that can be expanded and contracted in the radial direction of the pipe and is pressed against the inner surface of the pipe when expanded; and a mechanism for switching the size of the cylindrical cutter.