JP2005265058A - Internal inspection device for piping - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device capable of inspecting the inside of a pipe in a constant water supplying state by making use of a constant water supply type saddle water dividing cock. <P>SOLUTION: The internal inspection device for piping comprises a mounting base which is mounted on a hole section of a pipe and has a valve unit capable of opening and closing the hole section, a cylinder mounted on a location downstream rather than the valve unit of the mounting base, a piston watertightly inserted into the cylinder in a moving up and down state, and an endoscope watertightly inserted into the piston in a moving up and down state. An air ventilating hole connecting to the outside is formed on the cylinder, and a water conveying hole interconnecting a space between the its inside and the cylinder is formed on the piston. A positioning cap is arranged at an upper part of the cylinder, and a fixing nut capable of fitting with the positioning cap is also arranged on the piston. A waterproofing packing is built in the fixing nut, a tightening nut is also arranged at an upper part of the fixing nut, and an endoscope is watertightly fixed on the piston so that the waterproofing packing is elastically deformed by screwing up the tightening nut. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pipe internal inspection device for inspecting aging, deterioration, or the like inside a pipe such as a water pipe without cutting, destroying, or cutting off the pipe.

  When investigating the inside of aging pipes in plumbing equipment such as waterworks, the survey section was conventionally cut off and some of the pipes were cut.

  By the way, a so-called continuous water-type saddle water faucet that branches a branch pipe in a state of continuous water with respect to a water supply main pipe is known, for example, from Patent Document 1 and the like.

JP-A-4-151090

  As mentioned above, the conventional method of cutting off the survey section for internal investigation of old pipes, etc. is difficult to apply when it is inconvenient to shut off the upstream, and the part is removed or replaced by cutting etc. Therefore, the work becomes large.

  In view of this, the present invention focuses on a saddle water faucet that can branch a branch pipe or the like to a water supply main in an undisturbed state of water. It was made for the purpose of providing an apparatus that can do the above.

  In order to achieve the above-described object, in the present invention, a mounting base provided with a valve device that is attached to a perforation portion of a pipe and can open and close the perforation portion, and a cylinder that is attached downstream of the valve device of the attachment base, A pipe internal inspection device is configured by a piston that can be moved up and down in the cylinder and inserted in a watertight manner, and an endoscope that can be moved up and down in the piston and inserted in a watertight manner. The piston, together with the endoscope, can move up and down in the cylinder until the tip reaches before the perforated portion of the pipe, and has a guide function while protecting the endoscope in the meantime.

  An air vent hole communicating with the outside was formed in the cylinder, and a water guide hole communicating with the space between the inside and the cylinder was formed in the piston.

  A positioning cap is provided at the upper end of the cylinder, and a fixing nut capable of fitting with the positioning cap is provided on the piston.

  The fixing nut has a built-in water-stopping packing, and a clamping nut is provided above the fixing nut. By tightening the fastening nut, the water-stopping packing can be elastically deformed to fix the endoscope to the piston in a watertight manner. It was.

  A concave groove is formed at the lower side of the piston, and a retaining ring that can be engaged with the concave groove is provided at the front side of the endoscope.

  The mounting base uses an unrestricted saddle-type water faucet.

  According to the present invention employing the above-described means, the valve device of the mounting base provided in the pipe can be opened, and the endoscope can be inserted into the pipe from the perforated portion. You can check it. Further, the piston can be easily inserted by the water pressure relief by the cooperation of the air vent hole and the water guide hole, and the return of the piston due to the water pressure in the pipe can be avoided. Furthermore, the amount of piston insertion can be accurately set by adjusting the formation positions of the positioning cap and the fixing nut. Further, since the water-stopping packing is elastically deformed so as to be in watertight contact with the endoscope by the tightening nut, it is possible to prevent water leakage from the gap between the endoscope and the piston. Furthermore, since the return of the endoscope due to the water pressure is prevented by the engaging action of the concave groove and the retaining ring, the inspection work in an undisturbed water state can be easily performed. Furthermore, since the continuous water-type saddle water faucet is used as the mounting base, the existing saddle water faucet can be effectively used as a component of the inspection work, which is reasonable.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIGS. 1-3 show the work procedure by the piping internal inspection apparatus which concerns on one Embodiment of this invention. This apparatus is attached to the branch side through-hole 2 of the undisturbed water type saddle water faucet 1 that is already installed or newly installed in the water supply main pipe P. That is, this apparatus includes a cylinder 4 that can be attached to the branch side through-hole 2 of the saddle water faucet 1 by an attachment (cap nut or the like) 3 and a piston 5 that is inserted into the cylinder 4 so as to be vertically movable. A cable inserter is constituted by the above, and an inspection optical fiber cable 6 is built in the piston 5.

  The optical fiber cable 6 is provided with a scope (not shown) at the tip thereof to constitute an endoscope, and is connected to a monitor as appropriate to image the inside of the pipe to observe the inner surface of the pipe, and is connected to the monitor. It is also possible to record the video by a recording device.

  The piston 5 is provided with a tightening nut 7 and a fixing nut 8 from above, and by screwing the tightening nut 7 into the fixing nut 8, the water-stopping packing 9 built in the fixing nut 8 is pressed and deformed. Due to the reduced diameter, the optical fiber cable 6 is closely attached to ensure water tightness.

  Further, a positioning cap 10 is fitted into the upper portion of the cylinder 4 so that the intermediate convex portion 12 of the piston 5 can be engaged with the inner cylinder portion 11 so that the retaining function of the piston 5 and the positioning function before insertion are exhibited. To do. Further, the upper end flange 13 of the positioning cap 10 can be fitted to the fixing nut 8 of the piston 5 and performs a positioning action after the piston 5 is inserted during the fitting.

  Further, the cylinder 4 is provided with an air vent hole 14 that communicates the internal insertion port with the outside to facilitate the insertion of the piston 5. Further, the piston 5 is provided with a water guide hole 15 positioned above the intermediate convex portion 12, and introduces water in the water supply main pipe P between the cylinder 4 and the piston 5 through the inside of the piston. Reference numerals 16 and 17 denote seal packings formed of O-rings or the like provided above and below the cylinder 4 and the piston 5, and form a space between the cylinder 4 and the piston 5.

  In the inspection apparatus having such a configuration, the operation procedure will be described. First, as shown in FIG. 1, the intermediate protrusion 12 of the piston 5 with respect to the cylinder 4 attached to the saddle faucet 1 has a positioning cap 10. Pull it out until it touches. At this time, the optical fiber cable 6 is built in the piston 5 with both ends aligned so that the tip of the piston 5 does not protrude. The distance L between the positioning cap 10 and the fixing nut 8 is set to the height H of the saddle water faucet 1. That is, the distance L corresponds to the pushing amount of the piston 5. At this stage, the branch valve 19 of the saddle water faucet 1 is closed.

  Next, as shown in FIG. 2, the branch valve 19 of the saddle dispenser 1 is opened, the piston 5 is pushed into the cylinder 4, and the fixing nut 8 is fitted into the positioning cap 10. The pushing operation can be easily performed for the following reason. That is, by opening the branch valve 19 of the saddle faucet 1, the water in the water supply main pipe P enters the piston 5, and the water pressure acts to inhibit the pushing of the piston 5. Since the water is introduced into the cylinder 4 through the water introduction hole 15, the pressure between the water supply main pipe P and the cylinder 4 and the piston 5 becomes equal, and the piston 5 can be pushed in easily. In addition, the air vent hole 14 is provided in the cylinder 4, which is the reason why the piston 5 is easily pushed. By this pushing operation, the optical fiber cable 6 is fed into the saddle faucet 1 together with the piston 5 up to the branch hole 20 of the water supply main pipe P.

  Finally, as shown in FIG. 3, the optical fiber cable 6 is further pushed in, and the tip reaches the inside of the water supply main pipe P. The optical fiber cable 6 can move up and down in the piston 5 as described above, and can be rotated or fixed at an appropriate place. Furthermore, since the distal scope can be bent with the eyepiece at hand, almost the entire circumference inside the tube can be observed in detail. This observation and imaging can be enlarged using a separate camera or recording device, photographed, or stored.

  In addition, after making the optical fiber cable 6 reach the inside of a pipe | tube in the way mentioned above, it is possible that the optical fiber cable 6 is carelessly pushed back by the water pressure of the water supply main pipe P. Therefore, as shown in FIG. 4, a concave groove 21 is formed at the tip of the piston 5, and the concave groove 21 is slid in advance at the tip of the optical fiber cable 6 and can be engaged at the back end thereof. A retaining ring 22 is provided. The positions where the concave groove 21 and the retaining ring 22 are formed are preferably set so that both ends of the optical fiber cable 6 and the piston 5 are aligned when they are engaged.

  In the above-described embodiment, the saddle water faucet 1 is used as a mounting base for the cable insertion device. Other configurations can be adopted as long as they include a simple valve device (branch valve 19).

Cross-sectional view of the apparatus according to the present invention (first step) Same (second process) Same (3rd process) Sectional view showing the optical fiber cable retaining structure

Explanation of symbols

P Water supply main 1 Non-permeable saddle water faucet 2 Saddle water faucet branch side through-hole 3 Attachment 4 Cylinder 5 Piston 6 Optical fiber cable 7 Tightening nut 8 Fixing nut 9 Stop water packing 10 Positioning cap 11 Positioning cap Cylindrical part 12 Intermediate convex part 13 of the piston Upper end flange 14 of the positioning cap Air vent hole 15 Water introduction hole 16/17 Seal packing 19 Branch valve 20 of the saddle water faucet Branch hole 21 of the water supply main pipe Concave groove 22 formed at the end of the piston Retaining ring

Claims (6)

A mounting base provided with a valve device attached to a piping perforation portion and capable of opening and closing the perforation portion; a cylinder mounted downstream from the valve device of the mounting base; and vertically movable in the cylinder and watertight A pipe internal inspection device comprising: a piston to be inserted; and an endoscope that is vertically movable in the piston and is inserted in a watertight manner. 2. The pipe interior inspection device according to claim 1, wherein an air vent hole communicating with the outside is formed in the cylinder, and a water guide hole communicating with the space between the inside and the cylinder is formed in the piston. The piping internal inspection device according to claim 1 or 2, wherein a positioning cap is provided at an upper end of the cylinder, and a fixing nut capable of fitting with the positioning cap is provided on the piston. The fixing nut has a built-in water-stopping packing, and a clamping nut is provided above the fixing nut. By tightening the fastening nut, the water-stopping packing can be elastically deformed to fix the endoscope to the piston in a watertight manner. The piping internal inspection device according to claim 3. The pipe internal inspection according to any one of claims 1 to 4, wherein a concave groove is formed at a lower front side of the piston, and a retaining ring that can be engaged with the concave groove is provided at a front side of the endoscope. apparatus. The pipe internal inspection device according to any one of claims 1 to 5, wherein the mounting base includes a continuous water type saddle water faucet.

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