JPH0239736Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The present invention relates to a device for laying down burrs protruding inside a pipe, and particularly for a pipe buried underground such as a gas pipe, the device is used to remove burrs from a branch part. This invention relates to an instrument for flattening burrs formed when drilling holes.

In recent years, flexible inner surfaces have been used for the purpose of repairing and reinforcing aging parts of pipelines, such as gas pipes, water pipes, power lines, communication lines, etc., which are mainly buried underground. The lining is done by pasting a cylindrical lining material. These pipes often have burrs protruding from their inner surfaces, and these burrs may damage and damage the lining material, rendering the lining useless.

For example, in a gas pipeline, the low pressure pipe at the end is
There are many small-diameter supply pipes that branch out to supply gas to each household. When drilling the branch hole 2 in the low-pressure pipe 1, as shown in Figure 2, a large burr 3 of 10 to 20 mm was formed, and it was impossible to line it as it was, so some method was needed to bur it. It is necessary to remove or lay down the protrusion to the inner surface.

Conventional technology Conventionally, when lining pipes like this, the purpose was not to remove burrs, but in order to clean the inner surface of the pipe, a scraper or wire brush was passed through the pipe before lining the pipe. , scale and foreign matter adhering to the inner surface of the pipe are removed, and burrs may also be removed at the same time. Another method is to pass the tube through a rigid cylindrical body or sphere having an outer diameter slightly smaller than the inner diameter of the conduit, and forcefully flatten the burr with the cylindrical body.

Problems that the invention aims to solve However, the burrs in gas pipes as mentioned above are hard and large, so it is difficult to completely remove the burrs with a scraper or wire brush used to remove scale from the pipes. It was almost impossible. In addition, since the scraper moves while being strongly pressed against the inner surface of the pipe to scrape off scale, etc., it often ends up damaging the pipe in small diameter pipes or old pipes. .

In addition, in the method of forcibly laying down the burr through a rigid cylindrical body etc. inside the pipe, an extremely large amount of force is required because the burr is to be laid down all at once, and the cylindrical body etc. This was not a desirable method as it was difficult to pass through.

The present invention was developed in view of the above circumstances, and it is possible to flatten burrs with a small force, and it can also be applied to small-diameter pipes with many bends, and the lining can be removed in a later process. When you do,
It is an object of the present invention to provide a novel device for preventing damage to lining materials due to burrs.

Means for Solving the Problems The present invention is a cylindrical part consisting of a helical spring made of a metal wire tightly wound in a spiral, and the winding diameter of the helical spring is slightly smaller than the inner diameter of the tube. a spring-like jig having a tapered winding diameter at least at the front end of the cylindrical part;
It is characterized in that a traction member is connected to the front end.

Embodiment FIG. 1 shows an embodiment of a deburring device incorporating the device of the present invention. In FIG. 1, reference numeral 4 denotes a spring-like jig according to the present invention, which is a helical spring formed by tightly winding a metal wire 5.
The helical spring forms a cylindrical part 6 with a diameter slightly smaller than the inner diameter of the tube in the center, and has both ends 7,
8 has a tapered winding diameter.
A wire 11 as a pulling member is connected to one end 7 of this spring-like jig 4 via a universal joint 9 and an untwisting member 10, and the other end 8 of the spring-like jig 4 is connected to a universal joint 9. 9
It is connected to one end of the coiled steel wire 12 via.

Function To lay down the burr 3 in the conduit 1 using the device of the present invention, first insert the wire 11 into the conduit 1, pull the wire 11, and move the spring-like jig 4 into the conduit 1. It is inserted into the conduit 1 from one end 7 and allowed to advance through the conduit 1.

When the spring-like jig 4 comes to the position where the burr 3 protrudes in the pipe line 1, the spring-like jig 4 pushes the burr 3 forward and bends it to lie down, so that the lining material is not damaged.

When the spring-like jig 4 comes to the position where the burr 3 protrudes, the spring-like jig 4 is blocked by the burr 3.
However, in the present invention, the spring-like jig 4 is composed of a helical spring, so by strongly pulling the wire 11, the part of the spring-like jig 4 in front of the burr 3 can be removed. As it is stretched, the winding diameter of the helical spring is reduced, and one turn of the helical spring passes through the burr 3, at which time the tip of the burr 3 is pushed slightly forward and bent. When one turn of the helical spring passes through the burr 3 and moves forward beyond the burr, the stretched part of the spring-like jig 4 tries to contract rapidly, causing the rear part of the spring-like jig 4 to move forward. The next winding following the winding that passed earlier is hit strongly against the burr 3,
Hit the burr 3 and bend it forward.

Subsequently, the next turn passes through the burr while reducing its diameter, and at this time, as before, it pushes and bends the burr 3 a little, and the next turn then passes through the burr 3.
The burr 3 is struck and bent forward.

Thereafter, in the same way, each turn of the helical spring passes through the burr 3 one after another, pushing and bending the burr 3 little by little, and the next turn hitting the burr 3 is repeated alternately. Finally, the burr 3 is pressed and bent until it is almost flush with the inner surface of the pipe, so that the lining material lining the pipe 1 will not be damaged. This state is shown in FIG.

Effects of the invention According to the invention, each turn of the helical spring constituting the spring-like jig 4 pushes and bends the burr 3 little by little, and the tensile force of the wire 11 is overcome by the stiffness of the burr 3. In this case, the helical spring stretches and absorbs the resistance, so the pulling force on the wire 11 is small, and the burr 3 is connected to the wire 1.
Since the burr 3 is pressed and bent little by little several times to the extent that it can be bent with a tensile force of 1, the hard burr 3 can be sufficiently bent with a small force.

In addition, in the present invention, since the spring-like jig 4 is composed of a helical spring, it has flexibility itself, and if there is a bent pipe part in the middle of the pipe line 1, the spring-like jig The jig 4 can easily bend along the shape of the curved pipe section and easily pass through it.

Further, as shown in FIG. 1, the rear end of the spring-like jig 4 is connected to the tip of the coiled steel wire 12, and the other end of the coiled steel wire 12 is connected while rotating the coiled steel wire 12. By connecting it to a device that can send it out (for example, a commercially available drain cleaner, etc.), if it becomes difficult for the spring-like jig 4 to advance due to foreign objects, bent pipes, steps, etc. in the pipe line 1, Move the spring-like jig 4 forward while rotating it with the drain cleaner or the like, and use the spiral of the spiral spring.
It is possible to move the spring-like jig 4 forward easily.

Moreover, in the spring-like jig 4 in the present invention,
Although only the front end 7 may be formed into a tapered shape, as shown in FIG. When the tool 4 cannot be completely laid down by passing the tool 4 once, it is possible to completely lay down the burr 3 by pulling the spring-like jig 4 alternately from both sides at that part and reciprocating it repeatedly.

[Brief explanation of the drawing]

FIG. 1 is a central longitudinal sectional view of the device of the present invention. FIG. 2 is a central vertical cross-sectional view showing a state in which burrs in the conduit are protruding. FIG. 3 is a central vertical sectional view of the jig according to the present invention in a state in which burrs are being laid down. 4... Spring-shaped jig, 5... Metal wire, 6... Cylindrical part, 7, 8... End part, 11... Wire (traction member).

Claims (1)

[Scope of utility model registration request] The helical spring is made of a metal wire wound tightly in a spiral, and the helical spring has a cylindrical part whose winding diameter is slightly smaller than the inner diameter of the tube, and the winding diameter is made smaller at least at the front end of the cylindrical part. A device for flattening burrs in a pipe, characterized in that a traction member is connected to the front end of a spring-like jig having a tapered shape.