JP3058242U - Pipe inner surface cutting device - Google Patents

Abstract

(57) [Problem] To provide a pipeline inner surface cutting device capable of reliably guiding with a simple configuration and capable of sufficiently cutting a projection in the pipeline. SOLUTION: A cutting blade fixed to an output rotating shaft of an air rotating machine, and a plurality of axial members arranged outside a periphery of the air rotating machine with a link member interposed therebetween so that the axial members can move in parallel. And a guide member for urging the link member with an elastic body to move the axial member in parallel in the radial direction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a pipeline inner surface cutting device, and particularly to an underground cable conduit provided with a guide member for positioning a cutting blade at the center of the conduit.

[0002]

[Prior art]

 Underground pipes have lugs and peeling, tape dripping from the seam of pipes, and protrusions into the pipes such as plant roots, which hinder new cable installation and are removed. There is a need to. 2. Description of the Related Art Conventionally, there is a cutting device that removes a protrusion on a pipe inner surface.

[0003]

[Problems to be solved by the invention]

 A cutting device that removes protrusions on the inner surface of the pipeline can be moved along the central axis of the pipeline to efficiently cut the entire circumference of the inner surface of the pipeline. There are various guide devices for guiding the movement of the cutting device along the pipeline for this purpose, but there is no device capable of reliably guiding the device with a simple configuration.

[0004]

[Means for Solving the Problems]

 In view of the above circumstances, the present invention provides a cutting blade fixed to the output rotating shaft of an air rotating machine so that the guide can be reliably guided with a simple configuration and the protrusions in the pipeline can be sufficiently cut. A plurality of axial members are interposed outside the outer periphery of the air rotating machine with link members interposed therebetween so that the axial members can move in parallel, and the link members are urged by an elastic body to expand the diameter of the axial members. And a guide member that moves in parallel in the direction.

Further, the present invention provides a pipe line inner surface cutting device in which cutting blades are arranged so as to be directed in a radial direction so that protrusions in the pipe line can be sufficiently cut.

[0006]

[Embodiment of the invention]

 The present invention will be described in detail below based on specific embodiments shown in the accompanying drawings. First, an outline of the repair of the inner surface of the underground conduit will be described with reference to FIG. The distance of the protrusion 3 in the pipe 1 and the cutting position are checked by the TV camera 2 that has entered the pipe 1.

Next, the wire 4 is drawn into the conduit 3 and attached to the cutting device 5, and the wire 4 is passed to the opposite conduit opening. Subsequently, the air cable 6 is connected to the cutting device 5. Insert the cutting device 5 into the pipe entrance and pull it in from the opposite side to the construction site while checking with the TV camera 2.

[0008] Compressed air is supplied to the cutting device 5 to start cutting the projection 3. The cutting status is confirmed by the TV camera 2, and if the cutting at the construction site can be confirmed, the supply of the compressed air is stopped to complete the cutting. An air ejector (not shown) is attached to the rear of the TV camera 2, and the air ejected from the air ejector blows and cleans so that no cutting debris and debris remain.

[0009] Again, the TV camera 2 confirms the cutting condition and confirms that lining work is possible. When the confirmation is made, the equipment such as the cutting device 5 and the TV camera 2 is removed. Reference numeral 7 denotes a wire-mounted vehicle 7, 8 denotes an electric winch, and 9 denotes a TV camera vehicle.

FIG. 2 shows a state where the cutting device 5 is positioned in the mounting conduit 1 with the wire 4. Reference numeral 10 indicates a guide ball, and reference numeral 11 indicates untwisting. FIG. 3 shows that the cutting device 5 is connected to the air cable 6 at one end, the untwisted 11, the guide ball 10 and the wire 4 at the other end. 4 and 5 show the cutting device 5. An output rotary shaft 22 of the air rotating machine 21 is provided with a truncated tool rest 23, and a plurality of cutting blades 24 are arranged and fixed on an outer peripheral surface of the tool rest 23 in a radial direction.

An air introduction pipe 25 is projected from the rear end of the air rotating machine 21, and a pushing jig 26 is provided in the air introduction pipe 25. The push-in jig 26 can be made into a push-in type using a wire rod, and can be removed when used in a traction type. Reference numeral 27 denotes a one-touch joint 27 for air. On the other hand, a tow rope swivel joint 28 is provided in front of the tool rest 23.

A guide member 29 is provided on the outer periphery of the air rotating machine 21. In this embodiment, as can be seen from FIG. 5, the axial member 30 is arranged at a position where the circumference is equally divided into three. A roller 31 is rotatably provided on the axial member 30. A link 32 of the same length pivotally attached to the outer periphery of the air rotating machine 21 is pivotally connected to the axial member 30 so that the axial member 30 can move in parallel.

On the other hand, the ring 33 is slidably fitted to the outside of the air introduction pipe 25, and the rear end of the axial member 30 and the ring 33 are pivotally connected at both ends of the connection link 34. The spring 35 is externally fitted to the air introduction pipe 25 on the rear end face side of the ring 33, and the spring 35 is pressed by a nut 36 screwed to the rear end side of the air introduction pipe 25. The axial member 30 expands in diameter according to the degree to which the nut 36 is screwed into the air rotating machine 21 side.

[0014]

[Effect of the invention]

 According to the present invention, as described above, the cutting blade fixed to the output rotating shaft of the air rotating machine, and a plurality of axial members linked to the outer periphery of the air rotating machine with the link member interposed therebetween, the axial member can move in parallel. And a guide member that urges the link member with an elastic body to move the axial member in parallel in the diameter-enlargement direction. As a result, protrusions in the pipeline can be sufficiently cut.

Further, according to the present invention, since the cutting blades are arranged so as to face in the radial direction, protrusions in the pipeline can be sufficiently cut.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an outline of an inner surface repair of an underground cable conduit according to the present invention.

FIG. 2 is a view showing a state in which the cutting device is attached with a wire and positioned in a pipeline.

FIG. 3 is a side view showing a state in which an air cable is connected to one end of the cutting device, and a guide ball and a wire are connected to the other end.

FIG. 4 is a side view of the pipeline inner surface cutting device of the present invention.

FIG. 5 is a view showing an arrangement state of a guide member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pipe line 2 ... TV camera 3 ... Projection 4 ... Wire 5 ... Cutting device 6 ... Air cable 7 ... Wire mounted car 8 ... Electric winch 9 ... TV camera car 10 ... Guide ball 11 ... Twist return 21 ... Air rotating machine Reference Signs List 22: output rotary shaft 23: tool post 24: cutting blade 25: air introduction tube 26: pushing jig 27: one-touch joint for air 28: swivel joint for tow rope 29 ... guide member 30 ... axial member 31: roller 32 ... Link 33 ... Ring 34 ... Connection link 35 ... Spring 36 ... Nut

Claims (2)

[Utility model registration claims] 1. A cutting blade fixed to an output rotating shaft of an air rotating machine, and a plurality of axial members arranged outside the outer periphery of the air rotating machine with a link member interposed therebetween so that the axial members can move in parallel. A guide member for urging the link member with an elastic body to move the axial member in parallel in the radial direction. 2. The pipeline inner surface cutting device according to claim 1, wherein the cutting blade is arranged so as to face a radial direction.