JPH079071Y2 - Internal inspection device for piping - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an endoscope inside a pipe (hereinafter simply referred to as a pipe) for pressure-transporting various fluids such as a water pipe, an oil transportation pipe, or a gas pipe. The present invention relates to improvement of an internal inspection device for pipes that is inspected from the outside.

[0002]

2. Description of the Related Art As an apparatus for inspecting the inside of various pipes described above, the applicant of the present application filed an application of the above-mentioned Japanese Patent Application No. 1-94217 to insert an endoscope into the pipe so that the inside of the pipe was opened from the outside. We propose an inspection device that can be inspected.

In the above inspection apparatus, the endoscope is attached to the inside of the sleeve, and the tow string attached to the sleeve is wound around the take-up spool to pull the endoscope downward together with the sleeve. The lower end, that is, the part of the objective lens is projected into the pipe, and the internal condition of the pipe can be directly visually confirmed through the eyepiece lens or the monitor TV on the upper end side. By rotating, the angle of the objective lens can be changed and the inside of the pipe can be checked at any angle from front to back.

Further, in the above-mentioned inspection apparatus, a mounting cylinder having a male thread formed on the peripheral surface is provided at the bottom of the machine body to which the take-up spool is mounted, and the mounting cylinder is mounted on a pipe. ) Is attached on the pipe by screwing it into the connection port, and the endoscope is pulled down integrally with the sleeve by the winding operation of the drawstring by the take-up spool. It is configured such that the lower end portion thereof projects into the pipe through an inspection hole formed in the mouth and the pipe.

[0005]

In the conventional inspection apparatus constructed as described above, since the endoscope is fitted in the sleeve and vertically moved together with the sleeve, the sleeve is expensive. Although it is possible to protect the endoscope from external impacts and prevent damage or failure, on the other hand, in addition to the endoscope, a sleeve that requires precision processing is used, and It is necessary to insert the mirror concentrically and rotatably in the circumferential direction. In addition, between the sleeve and the slide hole of the machine body in which this is vertically slidably fitted, and between the sleeve and the inside Since a seal part for preventing fluid leakage must be provided between the mirror and the mirror, there is a problem in that the structure of the entire inspection apparatus is significantly complicated and the cost is increased.

Further, since the above-mentioned conventional inspection device has a mechanism in which the mounting cylinder provided at the lower end portion is screwed into the connection port of the valve for mounting, for example, an uninterrupted water split installed on a water pipe having a large diameter. Since it is possible to attach only a connection port such as a T-shaped pipe to a valve made with a large diameter, as a result, at the time of inspection, install a split K-shaped pipe or a valve equivalent to this in the pipe and use a perforator. Since it is necessary to form a hole for inspection, there is a problem that it takes a lot of time and cost.

[0007] Therefore, the technical problem of the present invention is to simplify the entire structure without using a sleeve, and to devise the invention so that it can be attached to a branch valve for a water supply pipe other than the uninterrupted water split character pipe. An object is to provide an internal inspection device for piping.

[0008]

[Means for Solving the Problems] The measures taken by the present invention to solve the above technical problems are as follows. In a pipe internal inspection device configured to inspect the inside of the pipe from the outside through the endoscope by inserting the endoscope at a substantially right angle to the pipe,

(1) The above-mentioned endoscope is constructed as a straight tube type having its own strength, and the endoscope is pulled downward by a machine base into which the endoscope is vertically movably inserted. A table spool having a take-up spool of an operating tow string and a center portion provided with an insertion hole for the endoscope is horizontally rotatably attached to the bottom surface of the machine table. Install the machine base on the pipe so that it can be freely rotated by screwing the connection tube provided at the bottom into the connection port of the valve attached to the pipe.

(2) On the bottom surface of the connection cylinder provided on the bottom of the table base, a connection hole is provided which is concentric with the insertion hole of the endoscope, in which the connection port of the branch valve attached to the pipe can be screwed. To be installed.

[0011]

The above means operates as follows. According to the above-mentioned means (1), the endoscope itself is configured as a straight tube type having strength without using a sleeve, and the pulling cord directly attached to this endoscope is wound on the winding spool. By pulling down the endoscope itself, the lower end (objective lens part) is projected inside the pipe for inspection, and the seal is only provided between the endoscope and the insertion hole of the machine body. Therefore, the structure of the entire device can be greatly simplified, and when changing the angle of the objective lens by rotating the endoscope in the circumferential direction, attach the spool to the table base and attach the spool. Since the machine base can be rotated horizontally, it is possible to freely change the angle of the endoscope without being disturbed by the tow string.

According to the above-mentioned means (2), since the endoscope can be attached to the branch valve attached to the pipe and the inside of the pipe can be inspected, each split pipe is attached to the pipe to make an inspection hole. Even without doing so, it is possible to easily inspect the inside of the pipe by using a new or existing branch valve that branches-connects the branch pipe (water supply pipe). As described above, the technical problems described above can be solved by the above means, and the problems of the conventional technology can be solved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the pipe internal inspection apparatus according to the present invention will be described in detail below with reference to the accompanying drawings. 1 is a partial sectional front view showing the whole of the inspection device according to the present invention, FIG. 2 is a partial sectional side view showing a state where the inspection device of the present invention is attached to a branch valve, and FIG. FIG. 1 is a partial cross-sectional side view showing a state in which the inspecting device of the present invention is attached to an uninterrupted water split character pipe, and in these drawings, 1
Is a straight tube type endoscope having strength as a whole, 2 is a socket attached to the upper end of the endoscope, 3 is an eyepiece provided on the upper portion of the socket 2, 4 is also a side surface of the socket 2. A monitor TV cable connection port 1a is provided to indicate the lower end of the endoscope, and an eyepiece (not shown) and an objective are provided on the upper surface of the eyepiece 3 and one side surface of the lower end 1a, respectively. The lens 1S is fitted into the lens 1S so that the lens 1S can be seen through and the condition inside the pipe can be visually confirmed.

Reference numeral 6 denotes a flange fixed to the upper end side of the straight tube type endoscope 1 by a socket 5, and left and right sides of the flange 6 are pulled by adjusting pins 6a, 6a. The upper end 7 of the string 7,7
a and 7a are attached to the lower ends of the left and right tow cords 7 and 7, and the left and right take-up spools 12 and 1 are attached to the machine base 8.
Each of the two is configured so that it can be freely wound.

On the other hand, in the machine base 8 in which the endoscope 1 is vertically movably fitted in a slide hole 8a formed in the center,
A rotary handle 14 is attached, and when the rotary handle 14 is rotated, the worm gear 15 attached to the drive shaft 14a rotates the worm wheel 13 to rotate the rotary shaft 11 in an interlocking manner. By rotating the take-up spools 12, 12, each take-up spool 12,
12 winds up the left and right pulling cords 7, 7 described above, and the endoscope 1
It is designed to pull down. In FIG. 1, 16 is a knob for a brake, and 16a is a brake.

A table base 9 is attached to the inside of the bottom mounting cylinder 8b of the machine base 8 such that its upper end is horizontally rotatably fitted through a push ring 10, a sliding washer and a slide washer (neither is shown). The insertion hole 9a for the endoscope 1 that communicates with the slide hole 8a of the machine base 8 is bored in the center portion thereof, and the lower end portion is formed with a split tube-shaped tube, which will be described later, on the outer peripheral surface. The connection port is provided with a male-threaded connection cylinder 9M which can be screwed into the connection port. Further, the connection port of the branch valve described later can be screwed into the inner peripheral surface of the connection cylinder 9M. A female screw threaded connection hole 9N is concentrically recessed so as to communicate with the insertion hole 9a.

Next, in FIGS. 1 and 2, reference numeral 20 denotes a saddle type branch valve (uninterrupted water branch valve) used for branching a domestic water supply pipe from a water distribution pipe, for example. A pipe (water distribution pipe) to which the valve 20 is attached, Pa is a branch hole formed in the pipe PS, 20a is a connection port for connecting the water supply pipe, 20b is saddle packing, 21 is a cover, and 2
2 is a ball case, 23 is a blind nut, and 25 is a spindle that opens and closes the ball valve body 24. When using this branch valve 20 to inspect the inside of the pipe PS, first propel the spindle 25. Ball valve 24 with passage 2
2b is closed, and then the water supply pipe is removed from the connection port 20a, and the table base 9 of the inspection device according to the present invention is mounted by using the connection hole 9N as shown in FIG. Open and rotate the rotary handle 14 to wind the left and right tow cords 7, 7 onto the take-up spools 12, 12.
The endoscope 1 descends and the lower end portion 1a thereof is passed through the branch valve 20 and projected into the pipe PS through the branch hole Pa, so that the situation inside the pipe PS can be observed through the objective lens 1S.

When the angle of the objective lens 1S is changed and the other part in the pipe PS is to be observed, the machine base 8 can be rotated in the horizontal direction with respect to the table base 9 to make the endoscope 1
Also, since the angle of the objective lens 1S can be freely changed by integrally rotating, the front, rear, left, and right parts in the pipe PS can be observed.

Further, when pulling up the endoscope 1 protruding into the pipe PS, if the hand is removed from the rotary handle 14 or the rotary handle 14 is unlocked, the endoscope 1 will be a fluid flowing in the pipe PS. 2 is automatically pushed back to the start position shown by the solid line in FIG. 2, it is not necessary to take means for pulling up the endoscope 1.

FIG. 3 shows a state in which the pipe PT having a diameter larger than that of the pipe PS explained in FIG. 2 or the internal PTa of the main pipe is inspected by the inspection device of the present invention. In the figure, 30 is a split character pipe used when inspecting a thick pipe PT, 30V and 30W are upper and lower split plates, 34 and 34 are bolts for fixing these plates 30V and 30W to the pipe PT, 30T is a connection port formed with a screw 30a for screwing the connection cylinder 9M of the table base 9 on the inner peripheral surface, 30b is a valve chamber, 32 is a spindle for operating a gate valve 32a for opening and closing the valve chamber 30b, and 31 is this A bolt head for rotating the spindle 32, PTb is an inspection hole formed in the pipe PT, 30c is a hole formed in the plate 30V, 3
3 and 33 indicate packing, and this pipe P
For the inspection of T, the lower end 1a of the endoscope 1 is inspected with an inspection hole P as shown.
The inspection is performed by projecting it to the internal PTa through Tb, but the inspection method is the same as when the branch valve 20 shown in FIG.

The pipe internal inspection device according to the present invention is constructed as described above. Therefore, it is attached to the branch valve 20 as shown in FIG. 2 to inspect the inside of the pipe PS,
As shown in FIG. 3, when the inside of a thick pipe PT can be inspected by being attached to the split-character tube 30, and when it is desired to change the angle of the endoscope 1 protruding into each pipe PS or PT to observe other parts. When the machine base 8 is rotated in the horizontal direction, the endoscope 1 and the tow cords 7 and 7 attached thereto rotate integrally, so that the endoscope 1 can be freely moved without being disturbed by the tow cords 7 and 7. Rotate
It makes it possible to observe each direction in the pipes PS and PT properly.

[0022]

The pipe internal inspection apparatus according to the present invention is as described above, and in that the endoscope is constructed as a straight pipe type having strength itself without fitting in the sleeve. , The manufacturing cost can be reduced by simplifying the whole structure of the inspection device, and the machine stand equipped with the spool for winding the tow cord can be horizontally rotated integrally with the endoscope without using the sleeve. As a result, the endoscope can be rotated freely without being obstructed by the tow cord and the function of observing any part inside the pipe can be demonstrated.Furthermore, it can be attached not only to the split letter tube but also to the branch valve. Therefore, by using a new or existing branch valve attached to the pipe, it is possible to easily perform inspection without drilling inspection holes in the pipe one by one, and it can be used for various fluids such as water pipes. Used for internal inspection of piping Those highly practical to Makoto.

[Brief description of drawings]

FIG. 1 is a partial sectional front view showing an entire pipe internal inspection apparatus according to the present invention.

FIG. 2 is a partial cross-sectional side view showing a state in which the inspection device according to the present invention is attached to a branch valve.

FIG. 3 is a side view showing a partial cross section of a main part of the inspection device according to the present invention attached to an uninterrupted water split character tube.

[Explanation of symbols]

 1 Endoscope 1S Objective lens 1a Tip part 7 Traction string 8 Machine stand 8a Sliding hole 9 Table stand 9M Connection tube 9N Connection hole 9a Insertion hole 12 Take-up spool 20 Branch valve 20a Connection port PS Piping 30 Split tube 30T Connection port PT piping

Claims (2)

[Scope of utility model registration request] 1. An internal inspection apparatus for a pipe, wherein the inside of the pipe is inspected from the outside through the endoscope by inserting the endoscope into the pipe at a substantially right angle, The endoscope is constructed as a straight tube type with its own strength, and a retractable string that pulls the endoscope downward is mounted on a machine base that vertically inserts the endoscope. In addition to providing a spool, a table base having an insertion hole for the endoscope in the center thereof is rotatably attached to the bottom of the machine base in a horizontal direction, and a connecting cylinder provided at the bottom of the table base is attached. An internal inspection device for piping, characterized in that the machine base is rotatably mounted on the piping by screwing it into the connection port of the valve mounted on the piping. 2. A connection hole, which is configured so that a connection port of a branch valve attached to a pipe can be screwed into the bottom surface of a connection cylinder provided at the bottom of the table base, is concentric with the insertion hole of the endoscope. The pipe internal inspection device according to claim 1, wherein the pipe internal inspection device is provided.