JPH0435799Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is used to inspect the inside of underground pipes that transport fluids such as city gas by running a television camera, pipe inspection and repair equipment, etc. It relates to a device that can be used advantageously.

BACKGROUND TECHNOLOGY This type of device for inserting and retrieving inspection equipment into pipes is
This is shown in Utility Application No. 10740, filed on January 28, 1986 by the applicant. The intraductal insertion/retrieval device of this testing equipment is as shown in Figure 8.
A cylinder 3 is attached to the tube wall 2 of the tube 1 into which the inspection equipment is to be inserted.
Partially insert the end 3a of the The axis of the cylinder 3 is perpendicular to the tube axis of the tube 1. An inspection device 4 such as a television camera is guided in an insertion direction 6 from inside the cylindrical body 3 along an inclined surface 5 formed at its end 3a.

When pulling out the inspection device 4 inserted into the tube 1 from the tube 1, the cable 7 connected to the inspection device 4 is pulled in the direction of the arrow 8. At this time, the cable 7 and the inspection equipment 4 are connected to the pipe wall 2 of the pipe 1.
In order to prevent the cable 7 and the inspection equipment 4 from getting caught in the hole 2a formed in the hole 2a, the roller 10 is displaced inward in the radial direction of the cylinder 3 by the drive rod 9. 2a to prevent it from getting caught in the hole 2a of the tube wall 2. The roller 10 is provided on a mounting piece 11, and this mounting piece 11 is pivotally supported on the inner wall of the cylindrical body 3 by an arm 12. Mounting piece 11
is pin-coupled to the drive rod 9 via a link 13. By pushing the drive rod 9 downward in FIG.
radially inwardly displaced.

Problems to be Solved by the Invention In the apparatus for inserting and retrieving inspection equipment into a pipe as shown in FIGS. 8 and 9, the tube 1 and the cylinder 3 are perpendicular, so The cable 7 is easily caught near the hole 2a in the pipe wall 2,
In addition, an excessive bending force is applied, which may cause damage.

In addition, the inspection device 4 and the cable 7 are bent relatively largely near the hole 2a, and therefore the shape and dimensions of the inspection device and the cable 7 are restricted.

Furthermore, when the cable 7 is pushed into the pipe 1 with the inspection equipment 4 inside, the cable 7 hits the guide surface 5 formed at the end 3a of the cylinder 3 and is bent greatly while pushing the cable 7 into the pipe. The insertion resistance is large. Therefore, the cable 7 cannot be inserted into the pipe 1 over a long distance.

The purpose of this invention is to eliminate the need to bend the inspection equipment and cables connected to it.
It is an object of the present invention to provide an apparatus for inserting and retrieving an inspection device into a pipe over a long distance and which can be retrieved.

Means for Solving the Problems The present invention provides a tube into which an inspection device is to be inserted, a cylinder which is fixed in communication with a hole formed in the wall of the tube, and a cylinder provided on the side of the cylinder. a guide tube having an axis within a plane passing through the tube axis of the tube, the axis being inclined so as to approach the tube axis along the front in the insertion direction of the inspection device, and having a space in which the inspection device is housed; and a first guide member that can be stored in the cylinder and can be inserted into and removed from the pipe, the first guide member approaching the inner surface on the opposite side of the pipe from the guide cylinder along the front in the insertion direction. a first guide surface having a first guide surface;
a second guide member that can be housed in the cylinder at a position farther from the tube than the first guide member, the second guide member being capable of guiding a testing device from outside to inside the hole of the tube; This is an intraductal insertion/retrieval device for an inspection device, characterized in that it includes a second guide member.

Effect According to the present invention, a cylinder is fixed to the tube into which the inspection device is to be inserted, and a guide cylinder is attached to this cylinder. The guide tube has an axis within a plane passing through the tube axis of the tube, and this axis is inclined so as to approach the tube axis along the front in the insertion direction of the inspection device. Therefore, when pushing the inspection device housed into the space of the guide tube, it is guided by the first guide member and inserted into the tube. At this time, the second guide member guides the testing device from the outside to the inside of the hole in the tube, thereby preventing the testing device from getting caught in the vicinity of the hole and becoming unable to enter the tube. When the test equipment is pulled out, it is also smoothly retrieved into the guide cylinder by the first and second guide members. In this way, the test equipment and cables connected to it can be inserted into and retrieved from the pipe without being bent significantly, which prevents the test equipment and cables from being damaged and prevents them from getting into shape. Since dimensional restrictions are reduced and insertion resistance is low, it becomes possible to insert the inspection equipment into the pipe over a long distance.

Embodiment FIG. 1 is a longitudinal sectional view of an embodiment of the present invention. The pipe insertion/retrieval device of this inspection equipment is installed in a pipe 20 buried underground that transports city gas, etc.
It is used to insert and retrieve inspection equipment 21 such as a television camera. This device basically consists of a cylinder 22 fixed to a pipe 20, and a cylinder 22 fixed to a pipe 20.
The guide tube 23 provided on the side of 2 and the inspection equipment 2
1 and a second guide member 25 for guiding the inspection equipment 21.

Figure 2 shows the first and second parts seen from the left side of Figure 1.
FIG. 3 is a side view of the guide members 24 and 25, and FIG. 3 is a simplified exploded perspective view of the intraductal insertion/retrieval device for the inspection equipment shown in FIGS. 1 and 2. A hole 26 is bored in the tube 20 . This tube 20 has
The base 27 is fixed. The base 27 has a hole 28 that communicates with the hole 26 of the tube 20, and an opening/closing means 30 for opening and closing with a shutter plate 29 is attached. A handle 31 is attached to the shutter plate 29, and the shutter plate 29 can be moved as shown in FIGS.
By sliding displacement in the left and right direction in the figure, hole 2
6, 28 can be opened and closed. The base 27 is
It is airtightly fixed to the tube 20 by seal members 82 and 83.

A mounting flange 80 is fixed to the base end of the cylindrical body 22, and cutouts 81 are formed in the mounting flange 80 at equal intervals in the circumferential direction and open in the same direction in the circumferential direction. Ru. The base 27 has mounting pins 32 that individually correspond to the notches 81.
is installed protrudingly. The axis of the guide tube 23 lies within a plane passing through the axis of the cylinder body 22, and is mounted by the base 27 so that the axis of the cylinder body 22 lies within a plane passing through the tube axis of the tube 20. Space 33 of cylinder body 22
communicates with the holes 26 and 28. A lid 35 is fixed to a flange 34 attached to the end of the cylinder 22. This lid body 35 includes seal tubes 36 and 37.
is fixed. Drive rods 38 and 39, which are fixed to the first and second guide members 24 and 25, respectively, are inserted into the seal tubes 36 and 37 while being hermetically sealed. Base end portions of a pair of arms 40 and 41 extending vertically are fixed to both sides of the first guide member 24 . The ends of the arms 40 and 41 are connected to the connecting piece 4
2. The connecting piece 42 is fixed to the connecting rod 38. The other guide member 25 has a guide rod 3
9 is fixed and reinforced by a reinforcing piece 43.
On both sides of this second guide member 25, approximately L is provided.
Letter-shaped engagement pieces 44 and 45 are fixed. Engagement piece 4
4 and 45 are engaged with arms 40 and 41. In this way, the first and second guide members 24, 25 can be vertically displaced relative to each other. First guide member 2
4 and the second guide member 25 have a shape in which the elbow is divided by a plane passing through its bent axis. The first guide surface 4 formed on this first guide member 24
6 is inclined so as to approach the inner surface 20a on the opposite side of the tube 20 (lower side in FIG. 1) from the guide tube 23 along the front side 47 in the insertion direction of the tube 20. Second guide surface 4 formed on another second guide member 25
8 serves to push down and guide the inspection instrument 21 from the outside (upper side in FIG. 1) to the inner side (lower side in FIG. 1) of the hole 26 of the tube 20. When the drive rods 38, 39 are raised, the first and second guide members 24, 25
can be stored in the space 33 of the cylindrical body 22, and in the stored state, the second guide member 25
is located further away from the tube 20 than the first guide member 24 (at the top in FIG. 1). A window plate 50 made of a transparent material is fixed to a part of the cylinder body 22, so that the upper and lower positions of the first and second guide members 24, 25 and the drive rods 38, 39 can be seen from the outside. .

A flange 51 is fixed to the guide tube 23, and this flange 51 can detachably fix the flange 53 of the auxiliary guide tube 52. The axis of the auxiliary guide tube 52 is deviated toward the tube 20 with respect to the axis of the guide tube 23, so that the inspection device 21 can be inserted smoothly into the tube 20. The auxiliary guide tube 52 can further be connected to the flange 55 by a joint.

The insertion and retrieval operation of the inspection device 21 will be explained with reference to FIG. As shown in FIG. 41, a pit 56 is excavated in the ground to partially expose the pipe 20 buried underground.

Next, as shown in FIG. 4, the base 27, the opening/closing means 30 having the shutter plate 29, and the electric drill 57 having the hole saw 58 inside the cylinder 74 are installed in this order, and then the shutter plate 29 is attached to the fourth Move to the right in FIG. 2 to open hole 28. In this state, the hole saw 58 is rotated by the electric drill 57, and the pipe 2
A hole 26 is drilled at 0.

Next, as shown in FIG. 4, the electric drill 5
7, and attach the cylindrical body 75 of the so-called no-blow case 59 to the opening/closing means 30.
With the hole 26 open, chips are removed from the inside of the hole 26 using a magnet 60 or the like. This no blow case 59
has a storage portion 61 for storing chips.

Therefore, as shown in FIG.
Attach this device to 0. The notch 81 of the flange 80 fixed to the cylindrical body 22 is latched to the locking protrusion 32 of the base 27 by being angularly displaced around the axis of the cylindrical body 22 . Prior to attaching the cylinder 22 to the base 27, the cable 62 of the inspection device 21 is passed through the auxiliary guide tube 52, and the auxiliary guide tube 52 is fixed to the guide tube 23 by flanges 51 and 53. In this way, the inspection device 21
It is stored in 3. Further, the first and second guide members 24 and 25 are displaced upward and housed in the space 33 of the cylindrical body 22.

Next, the first guide member 24 is lowered, and the second guide member 25 is placed near the hole 26 within the cylinder 22, resulting in the state shown in FIG. 4 and FIG. When the cable 62 is pushed in in this state, the inspection equipment 21
passes through the first guide surface 46 of the first guide member 24 to the tube 2
Inserted within 0. In order to prevent the inspection device 21 from getting caught near the hole 26, the second guide surface 48 of the second guide member 25 pushes the inspection device 21 downward. In this way, the inspection device 21 is smoothly inserted into the tube 20.

The inclination angle of the inspection equipment 21 and the cable 62 is such that the guide tube 23 and the auxiliary guide tube 52 are
Due to their inclination with respect to the axis of the tubes, their bending angle is small, so that the test device 21 and the cable 62 can be pushed into the tube 20 with low frictional resistance.

After inspecting the inside of the tube 20 with the inspection device 21, the cable 62 is pulled, and the inspection device 21 is housed in the space of the guide tube 23 while being guided by the guide members 24 and 25. Thereafter, the drive rods 38 and 39 are raised to accommodate the first and second guide members 24 and 25 in the space 33 of the cylindrical body 22. There, the shutter board 2
9 closes the hole 28.

Next, as shown in FIG. 4, the flange 80
In order to release the locking state between the notch 81 and the locking pin 32 and insert the inspection device 21 in the opposite direction (to the right in FIG. 4 and 6) with respect to the hole 26 of the tube 20, the guide tube 23 As shown on the left side of FIG. 6, the cylindrical body 22 is angularly displaced by 180 degrees around its axis from the state shown in FIG. Then, the hole 28 is opened again using the shutter plate 29, and
The guide members 24 and 25 are each displaced downward, the cable 62 is pushed in, and the testing device 21 is inserted into the tube 20. After the inspection of the right side of the tube 20 is completed, the inspection device 21 is moved to the guide tube 2 as shown in FIG.
At the same time, the first and second guide members 24 and 25 are housed in the cylindrical body 22 in a retracted state, and the hole 28 is then closed with the shutter plate 29.

Therefore, as shown in FIG. 4, the opening/closing means 3
The cylinder body 75 of the no-blow case 59 containing the plug 63 is opened and closed by removing the cylinder body 22 from the opening/closing means 3.
Fixed to 0.

Next, as shown in FIG. 4, the shutter plate 2
9 to the right to open the hole 28, and the plug 63 is screwed into the hole 28 with the operator's hand 64 placed inside the no-blow case 59. An internal thread is formed on the inner surface of the hole 28, and a plug 63 is attached to this internal thread.
The external threads of the two screw together.

Finally, as shown in FIG. 4, the base 27
Then, the vicinity of the plug 63 is airtightly sealed with a sealing material 73 made of a synthetic resin material, thus completing the inspection work inside the pipe 20.

5 is a longitudinal sectional view of another embodiment of the present invention, FIG. 6 is a side view of the embodiment shown in FIG. 5, and FIG. 7 is a side view of the embodiment shown in FIG. FIG. 3 is a simplified plan view. This embodiment is similar to the previous embodiment and corresponding parts are provided with the same reference numerals. It should be noted that a second guide member 68 having a second guide surface 67 is provided opposite to a first guide member 66 having a first guide surface 65 . This second guide member 68
, there are brackets 70, 71 parallel to the drive rod 39.
Accordingly, a drum-shaped roller 72 is provided rotatably around an axis perpendicular to the axis of the drive rod 39. The rest of the structure is similar to the previous embodiment.

When inserting the test device 21 into the pipe 20, the test device 21 and the cable 62 are connected to the first guide member 66.
is guided along the first guide surface 65 of the second guide member 68 and the roller 7.
2 prevents the inspection equipment 21 and the cable 62 from getting caught in the hole 26 of the tube 20 and its vicinity. In this way, the inspection device 21 and the cable 62 can be smoothly inserted into the pipe 20, and the inspection device 21 can be recovered by hooking the cable 62.

Effects As described above, according to the present invention, the inspection device 21 is inserted through the guide tube 23 attached to the cylinder body 22 at an angle, and the inspection device 21 is inserted into the first and second guide members 24, 66, 25. , 68, the inspection equipment 21, cable 62, etc. are not bent significantly, and therefore the inspection equipment 2
1 etc. can be inserted into and retrieved from the tube 20 without being damaged. In addition, since the inspection equipment 21 and the cable 62 do not bend significantly, the inspection equipment 21
1, etc., or it becomes smaller and easier to manufacture. Furthermore, since the inspection device 21 can be inserted and retrieved with small insertion resistance, the inside of the pipe 20 can be inspected by the inspection device 21 over a long distance.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention, and FIG. 2 is a first guide member showing the first and second guide members 24, 25.
3 is a simplified exploded perspective view of the embodiment shown in FIGS. 1 and 2; FIG. 4 is a side view as seen from the left side of the figure; FIG. Simplified sectional view for explaining the work, No. 5
The figure is a sectional view showing a guide member 66 and a second guide member 68 of another embodiment of the present invention, FIG. 6 is a side view seen from the left side of FIG. 5, and FIG. FIG. 8 is a cross-sectional view illustrating the insertion operation of the inspection device 4 in the prior art;
FIG. 9 is a sectional view for explaining the recovery work of the inspection equipment 4 in the prior art. 20...Pipe, 21...Inspection equipment, 22...Cylinder, 23...Guide cylinder, 24, 66...First guide member, 25,68...Second guide member, 27...Base, 30 ...Opening/closing means, 38, 39... Drive rod,
46, 65...first guide surface, 48,67...second
Guide surface, 52...Auxiliary guide tube.

Claims (1)

[Claims for Utility Model Registration] A cylindrical body that is fixed to a tube into which an inspection device is to be inserted, communicating with a hole formed in the tube wall; a guide tube having an axis in a plane passing through the axis, the axis being inclined so as to approach the tube axis along the front in the insertion direction of the inspection device, and having a space in which the inspection device is housed; a first guide member that can be stored in the tube and inserted into and removed from the tube, the first guide surface approaching the inner surface of the tube on the opposite side of the guide tube along the front in the insertion direction; the first with
a second guide member that can be housed in the cylinder at a position farther from the tube than the first guide member, the second guide member being capable of guiding a testing device from outside to inside the hole of the tube; An apparatus for inserting and retrieving an inspection device into a pipe, the apparatus comprising: a second guide member for inserting and retrieving an inspection device into a pipe;