JPS6216554Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention provides a novel in-pipe opening for opening a hole in a pipe covered with a synthetic resin lining layer that covers a connection hole formed in the pipe. Regarding drilling machines.

BACKGROUND ART Such a lining layer is made of flexible synthetic resin, and is lined on the inner wall of a pipe when an underground pipe conducting fluid leaks or to prevent leakage. When a branch pipe is connected to a pipe, if a lining layer is formed inside the pipe, a connecting hole with the branch pipe formed in the pipe will be blocked by the lining layer.

Conventionally, in order to open a connection hole that has been blocked by a lining layer, a shaft is first excavated underground to expose the connecting portion between the pipe and the branch pipe. Next, this branch pipe is removed near the connection part with the pipe, and the lining layer is torn with a knife or the like from the branch pipe side to open a connection hole to establish communication between the pipe and the connection pipe. Finally, fill in the shaft.

Problems to be solved by the invention It is clear that such conventional work requires an extremely large amount of effort. Therefore, it is desirable to have a connecting hole covered by a lining layer so that it can be easily opened.

The purpose of the present invention is to provide a tube 2 with a lining layer.
A new pipe hole drilling machine is provided which can easily drill the lining layer covering the connection hole formed in the pipe, thereby eliminating the need to excavate the aforementioned shaft. It is to provide.

Means for Solving the Problems The present invention provides a method for opening a hole in the lining layer 7 that covers the connection hole 3 formed in the tube 2 in the tube 2 provided with the lining layer 7 made of synthetic resin. In the pipe drilling machine, a longitudinal main body 20 running in the pipe 2 and a main body 20 are provided, and are movable forward and backward in a direction perpendicular to the longitudinal direction of the main body 20, and partially fit into the connection hole. means 33, 36, 50, 51 provided in the main body 20 for driving the aperture member 42 forward and backward; and means 47 for heating the aperture member 42. This is an in-pipe drilling machine characterized by the following.

Effect The present invention includes, for example, a longitudinal body 2 running inside a pipe 2.
0 is provided with an aperture member 42 that can move forward and backward in a direction perpendicular to the longitudinal direction of the main body 20, and this aperture member 42 is heated by a heating means 47 to be in this heated state. Tip part 4 of hole member 42
3 is caused to protrude in a direction perpendicular to the longitudinal direction of the main body 20 by forward/backward driving means 33, 36, 50, 51. The heated tip 43 of the aperture member 42 therefore ruptures the lining layer 7 covering the connection hole 3 due to impact force and heat.

The tip 43 of the opening member 42 partially fits into the connection hole 3, so that the lining layer 7 is reliably torn and the connection hole 3 is opened.

Such an in-pipe drilling machine runs inside the pipe 2 provided with the lining layer 7, and cuts the tip 4 of the drilling member 42.
3 reaches the position facing the connection hole 3, the opening member 42 may be driven to protrude by the forward/backward driving means 33, 36, 50, 51. Therefore, as described in connection with the prior art, there is no need to excavate and expose a shaft in the vicinity of the connection between the pipe with the lining layer and the branch pipe, and the connection hole 3 can be opened easily. Can be drilled. Therefore, work efficiency is greatly improved.

Embodiment FIG. 1 is a sectional view showing a state in which an intra-pipe hole-opening operation is performed using an intra-pipe hole-opening machine according to an embodiment of the present invention. A pipe 2 for transporting fluid such as gas is horizontally buried underground, and a branch pipe 4 is connected to the upper part of this pipe 2 via a connecting hole 3. If fluid leaks from the pipe 2, drill shafts 5 and 6 on both sides of the leaking part.
Canal 2 is partially excised. Next, from the shaft 5 to the pipe 2
A flexible lining layer 7 made of synthetic resin such as nylon is inserted into the pipe 2 toward the shaft 6 side, and this lining layer 7 is adhered to the entire inner wall of the pipe 2. The lining layer 7 may be cylindrical or sheet-like. When attaching the lining layer 7 to the inner wall of the tube 2, an adhesive may be used, or hot gas or the like may be pumped into the lining layer 7, and the lining layer 7 is attached to the inner wall of the tube 2 by the heat. It may also be attached to the inner wall. Wire ropes 8 and 9, which will be described later, are connected to the pipe hole opening machine 1 along the pipe axis of the pipe 2. One end of a sliding body 10 is connected to this wire rope 9. A wire 1 is attached to the other end of the sliding body 10.
1 are concatenated. By pulling the wires 8 and 11 in the shafts 5 and 6, the pipe hole puncher 1 and the sliding body 10 can be moved in the axial direction of the pipe 2. A television camera 12 is attached to the sliding body 10, and by means of this television camera 12, the operating state of the pipe drilling machine 1 can be known from the outside of the pipe 2. The pipe drilling machine 1 is used to drill a connecting hole 3 which is blocked by a lining layer 7 attached to the inner wall of the pipe 2.

FIG. 2 is a plan view of the pipe drilling machine 1, FIG. 3 is a longitudinal sectional view thereof, and FIG. 4 is a front view seen from the right side of FIGS. 2 and 3. The base 13 is
It includes a pair of left and right sliding members 14 and 15 extending along the tube axis direction of the tube 2, that is, along the running direction of the in-pipe hole puncher 1. Both ends of the sliding members 14 and 15 along the tube axis are curved upward to form a sled. As is clear from FIG. 4, both longitudinal ends of the sliding members 14 and 15 are connected to a connecting plate 1 having a roughly inverted U shape.
6 and 17. Connecting plates 16, 17
annular attachment pieces 18, 19 fixed to the top of the
, a rolling bearing 2 having an axis in the direction of the tube axis
1 and 22 are attached. Reinforcement plates 55 and 56 are fixed to the connecting plates 16 and 17 and the sliding members 14 and 15. Wire ropes 8 and 9 are connected to the reinforcing plates 55 and 56.

Protective member 2 across mounting pieces 18 and 19
3 and 24 are fixed. These protective members 23, 24
This prevents the main body 20 from coming into contact with the inner wall of the tube 2 and being damaged even if the base 13 falls over within the tube 2. The main body 20 includes a pair of support plates 25 and 26 parallel to the tube axis, an end plate 27, and a guide piece 28. End plate 27 is fixed to shaft 29. This axis 29
is supported by a bearing 21. A shaft 30 is fixed to the guide piece 28. This shaft 30 is supported by a bearing 22. The guide piece 28 is connected to the bearings 21, 2
2 and is generally cylindrical in shape. The guide piece 28 has a bearing 2
An opening 31 cut out along the axis of the guide piece 28 is formed on the opposite side of the guide piece 2 , that is, on the bearing 21 side.

A bracket 32 is fixed between the support plates 25 and 26 and closer to the bearing 21 from the center in the tube axis direction. A lever 33 is pivotally supported on this bracket 32 by a pin 34. The pin 34 is perpendicular to the tube axis and the axis of the guide piece 28. One end of a coil spring 36 that can elastically bend in the axial direction is fixed to the end of the base 35 of the lever 33 on the bearing 22 side. The other end of the spring 36 is fixed to a clevis piece 37. The clevis piece 37 is connected to the pin 38
It is pivotally supported on the support cylinder 39 via a bracket 40. This pin 38 has an axis parallel to pin 34. The support cylinder 39 is loosely fitted into the guide piece 28, and the bracket 40 projects from the opening 31 to the outside of the guide piece 28. A heat insulating material 41 is fixed to the upper part of the support piece 39 in a ring shape.

A hole member 42 is removably attached to the guide tube 39 via a heat insulating material 41 . Opening member 42
These include a conical part 43 as a tip tapered toward the upper inner wall of the tube 2, a fitting part 44 integrally formed at the lower part of the conical part 43, and a fitting part 4.
4 and a heated portion 45 extending downward. The hole member 42 is made of a material with good thermal conductivity, such as copper. Attachment pieces 46 are attached to the support plates 25 and 26.
The electric heater 47 is fixed by this. The electric heater 47 is formed in a cylindrical shape and has the same axis as the guide piece 28 . By energizing the electric heater 47, the heated portion 45 is heated, thereby heating the conical portion 43. The conical part 43 has
A large number of grooves 48 are formed along the generatrix.
A plunger 50 made of a high magnetic permeability material is pivotally supported by a pin 49 at the end of the base 35 closer to the bearing 21 with respect to the pin 34 . Pin 49 is pin 34
has an axis parallel to . The electromagnetic plunger 50 is
Loosely insert the electromagnetic solenoid 51 fixed to the support plates 25, 26 and the end plate 27. When the electromagnetic solenoid 51 is energized, the plunger 50 is magnetically attracted downward in FIG.

The support plates 2 extend between the support plates 25 and 26.
A weight attachment plate 52 is fixed to the lower portions of the weights 5 and 26. A weight 53 is attached to this weight attachment plate 52.
is removably attached. Therefore, the weight 5
The amount of attachment of 3 can be adjusted. By this weight 53, the base 1 is
The center of gravity of the portion including the main body 20 that is pivotally supported by the bearing 3 is always located below the axes of the bearings 21 and 22. Therefore, regardless of the attitude of the base 13, the main body 20 can always be maintained in the attitude shown in FIG. 3 with the guide member 28 facing upward.

Electric power is supplied to the electromagnetic solenoid 51 from a second external source via a power line. When the electromagnetic solenoid 51 is not energized, the plunger 50
is in a relatively upper position as shown in FIG. 3, and therefore the guide tube 39 and the aperture member 42 are in a relatively lower position.

When opening the lining layer 7 blocking the connection hole 3, the position of the pipe drilling machine 1 is set using the television camera 12 while pulling the wire ropes 8, 11. The perforated member 42 is heated by an electric heater 47 . Then, when the electromagnetic solenoid 51 is energized, the plunger 50 is displaced downward in FIG. 3 due to its magnetic attraction force, thereby displacing the lever 33 around the pin 34 in the clockwise direction in FIG. 3. . Therefore, the support cylinder 39 and the aperture member 42 are in a relatively upper position and are displaced toward the connection hole 3 to the position indicated by the imaginary line 54 in FIG. The hole-opening member 42 tears the lining layer 7 by its impact force and heat, and opens the connection hole 3.

Since the upper part of the opening member 42 is a conical portion 43, even if the axes of the connecting hole 3 and the opening member 42 are slightly misaligned, the connecting hole 3 can be reliably opened. The spring 36 has sufficient spring force to support the aperture member 42 provided in the support tube 39 with almost no deflection, and this spring force is sufficient to cause the aperture to open when the electromagnetic solenoid 51 is energized. Regardless of the inner diameter of the tube 2 and therefore regardless of the amount of displacement of the aperture member 42, the plunger 50
The deflection value is selected so as to ensure that the magnetic solenoid 51 is magnetically attracted to the electromagnetic solenoid 51. Since a groove 48 is formed in the conical portion 43 of the perforated member 42, the melted portion of the lining layer 7 flows down along the groove 48. Therefore, the connection hole 3 can be opened reliably.

Effects As described above, according to the present invention, the pipe hole punching machine according to the present invention is run inside the pipe 2 provided with the synthetic resin lining layer 7, and the position where the hole punching member 42 faces the connecting hole 3 is set. When the forward/backward drive means 33, 3
6, 50, and 51 to partially fit the tip 43 of the hole member 42 into the connection hole 3. Since the hole member 42 is heated by the heating means 47, it is a simple operation. It becomes possible to tear the lining layer 7 and open the connection hole 3. Therefore, as mentioned in relation to the prior art described above, there is no need to excavate a shaft to expose the connection area between the pipe provided with the lining layer and the branch pipe connected to that pipe, which improves workability. is significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view for explaining the operation of a pipe hole punching machine according to an embodiment of the present invention, FIG. 2 is a plan view of the pipe hole punching machine 1, and FIG. 3 is a cross section of the pipe pipe punching machine 1. figure,
FIG. 4 is a front view seen from the right side of FIGS. 2 and 3. 1... Pipe hole drilling machine, 2... Pipe, 3... Connection hole,
4... Branch pipe, 10, 13... Base, 21, 22
... Bearing, 20 ... Main body, 33 ... Lever, 36
... Spring, 42 ... Hole member, 51 ... Electromagnetic solenoid.

Claims (1)

[Claims for Utility Model Registration] An in-pipe hole punching machine for punching a hole in the lining layer 7 covering the connection hole 3 formed in the tube 2 in the tube 2 provided with the lining layer 7, A longitudinal main body 20 running in the pipe 2, and an opening having a tip portion 43 provided in the main body 20, capable of moving forward and backward in a direction perpendicular to the longitudinal direction of the main body 20, and capable of being partially fitted into the connection hole. An in-pipe drilling machine characterized by comprising: a hole member 42; means 33, 36, 50, 51 provided in the main body 20 for driving the hole member 42 forward and backward; and means 47 for heating the hole member 42. .