JPH0435800Y2 - - Google Patents

Description

[Detailed explanation 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 or pipe inspection and repair equipment. The present invention relates to a device advantageously used for.

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 6.
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. 6 and 7, the tube 1 and the cylinder 3 are perpendicular, so that The cable 7 is likely to get caught near the hole 2a, and an excessive bending force will be applied to the cable 7, which may result in damage.

In addition, the inspection device 4 and the cable 7 are bent relatively largely near the hole 2a, and therefore the shapes 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 includes a cylindrical body that has a storage space for plugs and the like, and one end of which is connected to a hole formed in a tube into which a testing device is to be inserted, and a side wall of the cylindrical body. It has a guide tube that is inclined toward the tube toward the front in the direction of insertion of the inspection device into the tube, and a proximal end that is airtightly fixed to the other end of the tube, and is flexible. The present invention is an apparatus for inserting and retrieving inspection equipment into a pipe, and is characterized in that it includes a bag body made of material.

Effect According to the present invention, one end of the cylindrical body is connected to the pipe into which the testing equipment is to be inserted, the cylindrical body is provided with a storage space for plugs, etc., and the testing equipment is inserted into the pipe from the guide tube. When inserting into a pipe through a hole, a worker's hand or the like must be inserted into the bag to ensure that the test equipment and the long body such as the cable connected to the test equipment are smoothly inserted through the bag through the hole. Can be inserted into a tube. In addition, when pulling out the testing equipment from the pipe through the hole, the operator guides the testing equipment, cables, etc. by hand through the bag, so that the testing equipment, etc. can be smoothly recovered. I can do it.

Embodiment FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a bottom view thereof, and FIG. 4 is a simplified exploded perspective view thereof. be. The cylinder 20 has a right cylindrical shape, and one end 20
A flange 21 is formed at a. This flange 21 is formed with notches 62 that are spaced at equal intervals in the circumferential direction and open in the same direction as the circumferential direction. A guide cylinder 22 having an axis within a plane passing through the axis of the cylinder 20 is attached near one end 20a of the cylinder 20 so as to protrude outward from the side wall of the cylinder 20. The guide tube 22 is inclined toward the tube 23 at an angle θ as it moves forward in the direction of insertion of the inspection device into the tube 23 (see FIG. 5), which will be described later.
is, for example, 45°. At the end of the guide tube 22,
A joining flange 25 is formed. Cylindrical body 20
On the side opposite to the guide tube 22, there is a storage space 2.
A storage box 28 forming a storage box 7 is attached. Cylindrical body 2
0. The guide tube and the box body 28 are made of rigid transparent or see-through synthetic resin.

A base end 30 of a bag 29 to be housed within the cylinder 20 is airtightly fixed to the upper end 20b of the cylinder 20 in FIG. 1 over the entire circumferential direction thereof. The bag 29 is made of a flexible material, such as rubber or synthetic resin, and is an airtight thin sheet-like member. This bag body 29 has a free end 3 so that one hand of a worker or the like can be inserted into the bag body 29.
1 is in the shape of a finger.

A base 32 can be fixed to the tube 23,
A hole 33 is formed in this base 32 . The shielding means 35 having a hole 34 which can be connected to the hole 33 is provided with a slidable shutter plate 36 which can be slid from the outside by means of an operating rod 37 to open the hole. 34 can be opened and closed. The hole 34 can communicate into the end 20a of the cylinder 20.

With the opening/closing means 35 attached to the base 32, the flange 2 formed on the end 20a of the cylinder 22
The notch 62 of 1 is locked to the locking piece 38 attached to the opening/closing means 35, and thus the base 32
The opening/closing means 35 and the cylindrical body 20 can be fixed airtightly. Furthermore, it is also possible to attach a fixing base 90 provided with a locking piece similar to the locking piece 38 to the base 32.

Referring to FIG. 5, the operation of inserting an inspection device 40 such as a television camera into the tube 23 and recovering the inspection device 40 from the tube 23 will be described. First, as shown in FIG.
3 is partially exposed.

Next, as shown in FIG.
2 and an opening/closing means 35 having a shutter plate 36 are attached to a base 32 which has been fixed to the tube 23 in advance.

Then, the shutter plate 36 is moved to the right in FIG. 52 to open the hole 34 of the opening/closing means 35. In this state, the hole saw 44 is driven by the electric drill 42 to drill a hole 45 in the pipe 23.

Next, as shown in FIG. 5, the opening/closing means 35
A so-called no-blow case 46 is attached to the. An operator's hand 47 is airtightly inserted into the no-blow case 46, and the chips 49 are collected into the storage portion 50 of the no-blow case 46 by the magnet piece 48.

Therefore, as shown in FIG. 5, the plug 52 is inserted into the no-blow case 46 with the hole 34 closed by the shutter plate 36.

Next, as shown in FIG.
6 to open the hole 34 of the opening/closing means 35 and close the hole 33 formed in the base 32. This hole 3
3 is provided with an internal thread, into which the external thread of the plug 52 is screwed. Thus plug 5
2 into the hole 33 of the base 83.

In this state, from the base 32 to the no-blow case 20
Then, the opening/closing means 35 is removed and a fixing base 90 is attached in its place, resulting in the state shown in FIG. 5 and 6.

Therefore, as shown in FIG.
The end portion 20a of the cylindrical body 20 is fixed to. Stiff cylinder body 2
Inspection equipment 40 such as a television camera is housed in advance in the guide tube 22 provided at The fixed lid body 54 is inserted airtightly.

A worker puts his/her hand into the bag 29 and removes the plug 52 temporarily tightened through the bag 29 from the hole 33 and stores the plug 52 in the space 27 of the box 28.

In this state, as shown in FIG.
to push the cable 53 so that the inspection device 40 smoothly enters the hole 45 of the tube 23.

Next, as shown in FIG.
A weighted lid 55 is placed on the top of the cylindrical body 20 so that the bag 29 does not get in the way when it is inserted into the tube 23. In this case, the bag body 29 is folded and the cylinder body 2
0 and the lid 55. In other words, the bag body 29 is prevented from being inverted due to the gas pressure inside the tube and expanding outside the cylinder body 20, thereby preventing the bag body 29 from interfering with the work. In this way, the inspection device 40 can be inserted into the tube 23. After the inspection inside the pipe 23 is completed, the cable 53 is pulled. At this time, if there is a risk that the cable 23 and the inspection equipment 40 may get caught in the hole 45 of the tube 23, place your hand in the bag 29.
7 to guide the cable 53 and inspection equipment 40.

After completing the inspection of the left side portion of FIG. 5 with respect to the hole 45 of the tube 23, the inspection device 40 is housed inside the guide tube 22, the hole 45 is temporarily closed with the plug 52, and the cylindrical body 20 is closed. around its axis
The plug 52 is angularly displaced by 180 degrees to the state shown in FIG. 5 and 10, and the plug 52 is removed again. At this time, such work is
This can be done by inserting the hand 47 into the bag body 29. The inspection device 40 and the cable 53 are inserted into the tube 23 through the hole 45 with the hand inside the bag body 29. Thus, with respect to the hole 45 of the tube 23, FIG.
A test to the right of 0 can be performed. After the inspection is completed, the cable 53 is pulled and the inspection device 40 is housed in the guide tube 22.

In this state, as shown in FIG.
The hole 45 of No. 3 is closed and the plug 52 is temporarily tightened, and then the cylindrical body 20 and the fixing base 90 are removed from the base 32, and the plug 52 is fully tightened using a wrench or the like. Therefore, as shown in FIG. 5, the periphery of the plug 52 and the base 32 is coated with a sealing material 57 made of synthetic resin or the like. In this way, the inspection work for the tube 23 is completed.

Although the bag 29 is shaped like a glove in the embodiment described above, it may have other shapes in other embodiments of the present invention.

Effects As described above, according to the present invention, the inspection equipment is inserted into the pipe through the guide tube that is attached diagonally to the cylindrical body, so that the long bodies such as the inspection equipment and the cables connected to it are This prevents the test equipment from being bent at a sharp angle, preventing damage to the test equipment, and eliminates or loosens restrictions on the shape and dimensions of the test equipment. Furthermore, since the insertion resistance acting on the inspection equipment and the longitudinal bodies such as the cables connected thereto can be reduced, the inside of the pipe can be inspected over long distances.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a plan view of the embodiment shown in FIG. 1, and FIG.
A bottom view of the embodiment shown in the figure, FIG. 4 is a bottom view of the embodiment shown in FIG.
FIG. 3 is an exploded perspective view of the embodiment shown in FIG. 5; FIG. 5 is a simplified sectional view for explaining the inspection work; FIG. FIG. 7 is a sectional view for explaining the operation of recovering the inspection equipment in the prior art. 20...Cylinder body, 22...Guide tube, 23...Pipe,
28...Box body, 29...Bag body, 32...Base, 3
6...Shutter plate, 52...Plug.

Claims (1)

[Scope of Claim for Utility Model Registration] A cylindrical body having a storage space for a plug, etc., and one end of which is connected to a hole formed in a tube into which an inspection device is to be inserted; A bag made of a flexible material, which has a guide tube that is inclined toward the tube toward the front in the direction of insertion of the testing device into the tube, and a base end that is airtightly fixed to the other end of the tube. An apparatus for inserting and retrieving inspection equipment into a tube, characterized by comprising a body.