JPH01196546A - Internal inspection of piping and apparatus therefor - Google Patents

Abstract

PURPOSE:To inspect the inside of a pipeline without water failure, by fixing a split tee with a gate valve on a piping to mount an inspecting device containing a fiber scope in an inspection hole drilled. CONSTITUTION:A split tee 1 is fixed at an inspecting point of a piping T by clamping split plates 2 and 3 with a bolt 4. An inspection hole is drilled in the piping T with a drilling device 11 screwed into a tip hole 6 provided at a takeoff port 5 and a lower end coupling 26 of a sleeve 21 is screwed into the takeoff port 5 to be connected thereto and a gate valve 8 is opened. A rotor 24 and a working cylinder 23 are turned with an operation handle 24t and a tip inspection head 31 of a center rod 27 is run through the inspection hole and fixed sticking into the piping T. A fiber 33 is inserted into an insert hole of the center rod 27 at an insertion port of a cap body 28 and a tip part 33a is set inside an inspection window fitted into the inspection head 31. Then, a dial 32b is operated to adjust the angle of the tip 33a as desired and the inside of the piping T is observed closely with a scope screen section 32a through the inspection window.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is for investigating the internal state of various fluid distribution pipes (hereinafter simply referred to as pipes) such as water pipes, oil transport pipes, or gas pipes. This article relates to research methods and equipment used for the research.

[Conventional technology]

For example, if cast iron water pipes are used for many years, so-called rust spots may form on the inner surface of the pipe T as shown in Figure 1, producing red water, and eventually reducing the water flow capacity and causing the pipe to no longer function as a pipe. The piping T where the rust bumps
can be cleaned, lined and regenerated,
Alternatively, the pipes were rehabilitated by pushing polypipes inside the cleaned pipes.

However, since the occurrence of rust lumps X cannot be visually confirmed from the outside of the piping T, conventionally, the occurrence was confirmed when red water or a decrease in water flow occurred, or it was estimated based on the long experience of the contractor. If the measures are taken too late, corrosion, water leakage, or various water quality problems may occur, or conversely, there may be cases in which the wrong treatment is carried out even though no rust lumps have occurred, resulting in damage to the piping T. There is a strong desire to develop a method and device that can accurately investigate the occurrence of rust bumps X from the outside.

Therefore, an investigation method was developed in which a fiberscope developed for industrial use is inserted into the interior of the pipe T to observe the extent to which rust lumps X are occurring. According to this investigation method, the tip of the fiber equipped with the objective lens and light guide is connected to the pipe T.
By inserting it inside the pipe, the situation inside the pipe T can be displayed on the scope screen, allowing you to directly visually check the extent of rust lumps X, allowing you to take appropriate measures for pipe cleaning and lining. be.

[Problem to be solved by the invention] However, when inserting a fiberscope into the inside of the piping T, it is necessary to drill an insertion hole in the distribution IT, so it is necessary to shut off the water in the piping T during the investigation. However, there were problems such as causing inconvenience to users due to water outages and requiring cumbersome procedures such as notifying users of water outages and arranging water tankers.

Furthermore, the above-mentioned problems also occur in other types of fluid piping, such as oil transport pipes and gas pipes.

Therefore, the technical problem of the present invention is to be able to accurately confirm the occurrence of rust lumps, etc. by inspecting the inside of the pipe with a fiberscope without cutting off the water in the pipe or otherwise blocking the flow of fluid. The purpose of this invention is to provide a survey method and a survey device for use in this survey.

[Means for solving problems]

Among the measures taken to solve the above technical problem, the means constituting the investigation method are as follows.

(1) A split pipe with a gate valve provided at the outlet is fixed to the pipe, and a survey hole is drilled in the pipe by rotating the cutter of the drilling machine attached to the above-mentioned outlet.

(2) Attach a survey device with a built-in fiber scope to the above outlet.

(3) Insert the tip of the inspection window of the inspection device into the interior of the pipe through the inspection hole to investigate the pipe line.

Further, the means for configuring the above investigation device is as follows.

(4) A center rod provided with an inspection window at its tip is inserted into a sleeve configured to be freely connectable to the outlet of a split-shaped pipe attached to the piping so as to be adjustable in the longitudinal direction.

(5) Inside the center rod, a fiber of a fiberscope for inspecting the inside of the piping through the inspection window is inserted so as to be freely operable.

(6) A locking member for temporarily fixing the fiber by tightening a set screw is provided at the entrance portion of the center rod into which the fiber of the fiberscope is inserted.

However, in this case, a split-shaped pipe with a gate valve at the outlet is one in which the plate for the pipe holder is divided into two parts, upper and lower, and can be fixed around the pipe by tightening bolts, and is connected to the metal of one of the pipe holders. A gate valve (sluice valve) is installed in the middle of the installed installation port.
means a device that is installed so that it can be opened and closed freely.

[Effect]

Each of the above means operates as follows.

■The element (1) above that constitutes the investigation method is that the cutter of a drilling machine can be used to drill an investigation hole at the inspection location of the pipe, and when drilling, the drilling machine is attached to the outlet of the split pipe. In addition, after drilling, the outlet can be closed with a gate valve, so the fluid in the pipe will not flow out from the outlet during work, and therefore the drilling work on the pipe can be done without water outages or interruptions. make it possible to do.

■Similarly, the factor (2) above is related to the insertion of the fiberscope, since when investigating the inside of piping using a fiberscope, an investigation instrument with the fiberscope built in is attached to the outlet of the divided pipe. Even if the gate valve at the outlet is opened, there is no need to worry about the fluid in the piping flowing out from the outlet. Therefore, even if an investigation is performed using a fiberscope, it is possible to conduct an investigation without water cut-off or interruption of the piping. do.

■Similarly, the factor (3) above is that internal inspections of piping using a fiberscope are carried out through the inspection window of the survey instrument inserted inside the piping, so the fiberscope does not come into direct contact with the fluid in the piping. Therefore, it is possible to accurately investigate the presence or absence of rust lumps, etc.

■Furthermore, the above-mentioned element (4) that constitutes the above-mentioned investigation device is such that the sleeve is directly connected to the outlet of the split-shaped pipe, so there is no concern that the fluid in the pipe will flow out from the outlet during the investigation. Therefore, it is possible to conduct an internal investigation of the piping without cutting off the water supply or shutting off the water, and since the center rod with the inspection window biased can be freely adjusted in the longitudinal direction (up and down direction), it is possible to conduct an internal investigation of the pipe to suit the diameter of the pipe to be investigated. By adjusting the center rod accordingly, the investigation window can always be set at a position suitable for investigation (for example, in the center of the pipe).

■Similarly, the element (5) above is that while it is possible to visually confirm the condition of the pipe surface accurately through the fiberscope through the inspection window inserted inside the pipe, it is also possible to operate the fiberscope's fiber at hand. Since the position of the objective lens and light guide provided at the tip can be adjusted to any desired angle, the tip can be correctly aligned with the inner surface of the investigation window, and the investigation angle (direction) can be set arbitrarily. It makes it possible to accurately investigate every corner of the inside of piping.

(ΦSimilarly, element (6) above means that the fiber tip, which is correctly aligned with the investigation window by hand
Since the locking member temporarily fixes the fiber in its position, it is possible to accurately examine the interior of the pipe through a fiberscope.

As described above, the above-mentioned technical problem can be solved by the above-mentioned means, and the problems of the conventional technology can be solved.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the above-mentioned internal pipe inspection method and device according to the present invention will be described in detail below with reference to the accompanying drawings.

Figures 1 and 2 are a perspective view and a front cross-sectional view illustrating the installation process of the split-shaped tube 1, which is the first step of the present invention, and the split-shaped tube 1 is a top and bottom split plate. 2.3 to bolt 4...
・It is fixed to the surveyed part of the pipe T by tightening it. Although FIG. 1 shows a situation in which rust lumps X have occurred on the pipe surface of the pipe T, this is omitted from FIGS. 2 onwards for convenience of explanation. Reference numeral 5 denotes an outlet connected to the upper side split plate 2, and a female thread 6a is formed on the inner surface of the tip opening 6. Further, 5a is an internal passage of the outlet 5, and 5b
denotes a flow port opened in the plate 2, 7 denotes a packing, and 8
9 is a gate valve (sluice valve) that opens and closes the internal passage 5a, 9 is a screw shaft that is screwed into the nut 8a of the gate valve 8 to open and close the gate valve 8, and 10 is a nut body that rotates the screw shaft 9. show.

FIGS. 3 and 4 are cross-sectional views illustrating the second step of the present invention, which is the perforation step. In the figures, 11 indicates a hole in which the tip is provided at the outlet S of the above-mentioned split tube 1. A perforator (also called a polar, driller, or hole solar) for uninterrupted water branching is screwed into the tip opening 6, and 13 and 14 are a drill and a cutter attached to the rotating shaft 12 of the perforator 11. FIG. 3 shows the state in which the investigation hole Ta is being drilled in the pipe T using the drill 13 and the cutter 14, and FIG. 4 shows the state when the drilling is completed.
During drilling, a drilling machine 11 attached to the tip port 6 prevents fluid from flowing out, and after drilling is completed, the gate valve 8 is closed to prevent fluid from flowing out.

FIG. 5 is a side view illustrating the third step of the present invention, which is the process of investigating the inside of the pipeline. Code 20 at exit 5
Install the survey device shown in Figure 1 and conduct the survey.

The investigation device 20 has a housing body 22 as shown in FIG. 9 attached to the upper end of a sleeve 21 formed into a cylindrical shape as shown in FIGS. 5 and 6, and a coupling for connection at the lower end. 26 is attached, and a center rod 27 having a square screw 27b formed on the circumferential surface is fitted inside the housing body 22 so as to be movable up and down. square screw 27
An actuating cylinder 23 is rotatably fitted into the actuating cylinder 23, which has a threaded groove 23a that engages with the actuating cylinder 23a.

Furthermore, in the figure, 24 is a rotating body fitted to the upper end of the actuating tube 23 that protrudes from the housing body 22, and 24n is a set screw that is screwed into the screw hole 24b to integrate the rotating body 24 with the actuating tube 23. show. Reference numeral 24t is an operation handle whose tip is screwed into the screw hole 24a and attached to the rotating body 24. When the rotating body 24 is rotated with this handle 24t and the operating cylinder 23 is rotated together, the center is rotated by the engagement of the threaded groove 23a and the square screw 27b. The rod 27 is configured to operate in either the up or down direction. In addition, in FIG. 9, 25 is a bushing, 25a is a V groove formed on the circumferential surface of the bushing 25, and 25a is a V groove formed on the circumferential surface of the bushing 25.
2a is a screw hole for attaching the sleeve 21, 22b is a screw hole for a bush fixing screw (not shown), 22c is a screw hole for a fixing screw 22n shown in FIGS. 5 and 6, and 22d is a sixth screw hole.
The screw hole for the guide screw 22g shown in the figure is shown.

Furthermore, in FIG. 6, 26a is a connecting screw formed at the lower end of the coupling 26, and when this is screwed into the tip opening 6 of the split tube 1, the investigation device 2o is opened as shown in FIG. The whole can be installed in an upright state on the upper surface of the split-shaped tube 1. Further, 26b is an O ring, 27a is an insertion hole provided along the entire length of the center rod 27, and 31 is an investigation head provided at the lower end of the center rod 27.
A shows an investigation window constructed by inserting a transparent acrylic plate or the like.

In FIGS. 5 to 7, 28 is a cap body fixed to the upper end of the center rod 27, and an insertion hole 28a formed in the center of the cap body 28 is inserted into the insertion hole 27a of the center rod 27. The fiber 33 of the industrial fiber scope 32 can be inserted into the fiber scope 32, and the tip 33a is provided with an objective lens and a light guide (both omitted). 32a, and a dial 32b for adjusting the angle of the tip 33a. In addition, 30 is the insertion port 2
The spring plate 30 is fitted into the fitting groove 28b recessed in the inner peripheral surface of the spring plate 8a, and the adjustment screw 29 is screwed in as shown in FIG.
When the fiber 33 is compressed and deformed, the fiber 33 inserted into the insertion port 28a is pressed and fixed.

In the figure, 28c indicates a screw hole for the adjustment screw 29, 28d indicates a screw hole for a fixing screw (not shown), and 28e indicates a fitting hole into which the upper end of the center rod 27 is fitted.

Since the investigation device 20 used in the present invention has the configuration as described above, in use, the sleeve 21 The lower end coupling 26 is screwed in to connect, while the gate valve 8 of the outlet 5 is opened.

At this time, the fluid in the pipe T flows from the drilled investigation hole Ta through the passage 5a to the connected investigation device 20, but since the space between the coupling 26 and the center rod 27 is sealed by the O-ring 26b, the fluid External leakage is prevented.

After installing the sleeve 21 as described above, rotate the rotating body 24 and the operating cylinder 23 with the operating handle 24t.
Due to the engagement of the thread groove 23a and the square screw 27b, the tip inspection head 31 of the center rod 27 protrudes from the inside of the outlet 5 through the inspection hole Ta and into the inside of the pipe T as shown in FIG. 10, and its protruding position is fixed with a screw. Secure by tightening 22n.

Next, the fiber 3 is inserted through the insertion port 28a of the cap body 28.
3 into the insertion hole 27 of the center rod 27.
a, and set the tip 33a inside the investigation window 31a fitted into the investigation head 31 as shown in FIG.
Further, the set state of the fibers 33 is fixed by pressing the plate spring 3o by screwing in the adjustment screw 29.

After setting the fiberscope 32 in this way,
By operating the dial 32b and setting the fiber tip 33a at an arbitrary angle, the inside of the pipe T can be observed in detail on the scope screen 32a through the inspection window 31a. It is possible to accurately investigate whether or not this has occurred.

After the investigation is completed, by removing the investigation instrument 20 from the tip port 6 and closing the gate valve 8, fluid leakage can be prevented.

〔effect〕

As described above, the present invention allows the investigation of the inside of a pipe using a fiberscope without cutting off or cutting off the water in each pipe. There is no need to worry about causing a nuisance, and the construction is simple as there is no need to go through various procedures to notify of water outages or interruptions, so it has the advantage of being economical by saving construction materials and labor, and the fiberscope is also an excellent investigation window. It has the advantage of being able to accurately investigate the inside of a piping system because it can be inspected without directly touching the fluid inside the pipe. It is suitable for dogs when used to investigate the inside of various fluid piping such as pipes or gas pipes.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the split tube attached to the piping, Figure 2 is its front cross-sectional view, and Figures 3 and 4 show the process of drilling a survey hole in the piping. 5 is a configuration diagram showing the entire investigation device according to the present invention, FIG. 6 is a partially sectional front view of the investigation device, and FIG. 7 is an enlarged view of line A-A in FIG. 6. 8 is a front view of the leaf spring, FIG. 9 is a sectional view showing the configuration of the main parts of the survey instrument, and FIG. 10 is a front sectional view showing the state at the time of survey. T is the pipe, Ta is the investigation hole, 1 is the split pipe, 5 is the outlet,
6 is a tip opening, 8 is a gate valve, 11 is a punching machine, 14 is a cutter, 20 is a survey device, 21 is a sleeve, 27 is a center rod, 29 is an adjustment screw, 30 is a leaf spring, 31a is a survey window, 32 is a fiberscope, 33 is fiber, 33
a is the tip. Patent applicant Fuji Tecom Co., Ltd. II Figure 2 Figure 3 Figure 4 Figure 5 Figure 7 Figure 9

Claims (3)

[Claims] (1) A split pipe with a gate valve installed at the outlet is fixed to the pipe, and the cutter of the drilling machine attached to the above outlet is rotated to drill a survey hole in the pipe. A method for investigating the inside of piping, which comprises: installing a survey instrument with a built-in scope; and inserting a portion of the inspection window at the tip of the survey instrument into the interior of the pipe through the investigation hole to investigate the pipe line. (2) A center rod with an inspection window at the tip is fitted into the sleeve configured to be freely connectable to the outlet of the split pipe to be attached to the piping, so that the center rod can be freely adjusted in the longitudinal direction. An apparatus for investigating the inside of piping, characterized in that the fiber of a fiberscope for observing the inside of piping is inserted through the above-mentioned investigation window in a freely operable manner. (3) The internal pipe investigation device according to claim 2, characterized in that a locking member for temporarily locking the fiber by tightening a set screw is provided at the entrance portion of the center rod into which the fiber of the fiberscope is inserted.