JPH077673Y2 - Plug for perforation of conduit - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a closing plug for a perforated portion formed in a lined conduit, and more specifically, when repairing a part of the conduit, the upstream of the plug. The present invention relates to a closing plug that seals holes drilled in side and downstream conduits after completion of repair.

[Conventional technology]

When repairing a part of the conduit, perforate the pipe wall in the upstream and downstream conduits, insert a bag into the pipe from this perforation, inflate the bag to block the flow of fluid and cut off the block section. Repair the inner conduit. In some cases, the upstream side and the downstream side are connected by a bypass pipe to perform repair work without restricting the use of fluid on the downstream side. Such a technique is disclosed, for example, in JP-A-63-297894.

After the above repair work is completed, the hole drilled in the pipe wall must be closed.

Conventionally, the closing of the perforation has been performed by providing a female screw in the perforation of the pipe wall and screwing the plug into it. In such a conventional perforated part, the lining inside the pipe around the plug is peeled off by the perforation process, and this part is not sealed, so
There is a problem that peeling progresses at that portion and its adjacent portion.

[Problems to be solved by the device]

The present invention solves the above-mentioned drawbacks in a plug that seals a perforated portion formed in the wall of a conduit during repair work of the conduit, and seals the inner diameter lining portion of the conduit around the plug.

This seal is reliable and prevents the lining from peeling off.

Work is easy.

There is no problem with corrosiveness or durability.

It is intended to provide a plug for closing a perforated portion of a conduit, which has been developed mainly for the purpose of providing excellent performance.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is configured by combining the following technical means.

(A) A plug for sealing a perforated portion formed in a pipe wall of a conduit, the plug including a sleeve, a pipe inner side seal packing, a core body, a pedestal, and a cap.

(B) The sleeve is hollow, having an external thread on the outer diameter that is screwed into the internal thread of the bored portion of the conduit, an internal thread on the inner diameter, and a tapered head portion at the tip of the tube inner side against which the tube inner seal packing abuts. It has a cylindrical shape.

(C) The pipe inner seal packing is a ring-shaped packing that seals the lining portion around the perforated portion in the conduit, and is made of an elastic material. Its shape is a ring with a chamfer on its inner diameter that presses against the lining surface inside the conduit. The cross section of this ring has a surface on the inside of the tube that comes into contact with the flange surface of the core, which will be described later, a surface on the outside of the tube that comes into contact with the lining surface inside the tube, and has the above-mentioned chamfered portion on its inside diameter.

(D) The core has a main screw and a cap screw that are screwed into the female screw of the sleeve, and the outer diameter of the inner end of the pipe is smaller than the inner diameter of the female screw of the perforated portion of the conduit. It has a flange that abuts on the inner end surface of the pipe.

(E) The pedestal has a ring shape, the inner diameter is larger than the outer diameter of the sleeve, the lower surface is seated on the outer diameter of the conduit via the sealing material, and the upper surface is in contact with the sealing surface of the cap via the sealing material.

(F) The cap is a cap nut that includes a female screw that is screwed into the cap screw, and that has two sealing surfaces that come into contact with the sleeve tail end and the pedestal via sealing materials. By attaching this cap nut, each part of the closure plug of the present invention is finally completely sealed.

[Action]

FIG. 1 is a longitudinal sectional view of the plug of the present invention, showing a state in which the plug is finally assembled in a hole of a conduit 100 and attached.

An internal thread 102 is provided in a hole formed in the conduit 100. The conduit 100 also has a lining 101 on its inner surface.
The male screw of the sleeve 10 is screwed into the female screw 102.
The head portion 13 of the sleeve 10 on the pipe inner side is tapered, and the pipe inner seal packing 20 is externally fitted to the tapered portion. The tube inner seal packing 20 is pressed against the lining 101 on the inner surface of the conduit 100 by the flange 31 of the core body 30.

The core body 30 is a main screw 33 that is screwed into the female screw of the inner diameter of the sleeve 10.
When the main screw 33 is screwed up, the flange 31 at the leading end of the core body 30 presses the pipe inner seal packing 20 against the inner surface of the conduit. That is, the tube inner seal packing 20 includes the lining 101 and the sleeve 1 on the inner surface of the tube.
The tapered portion of the head portion 13 of 0 is brought into contact with three places of the flange 31 of the core body 30 to seal the respective portions.

A cap 40 is screwed into a cap screw 34 at the tail end of the core body 30. A sealing material 60 made of an O-ring is put on the contact end surface between the cap 40 itself and the sleeve 10 to seal this surface.

Also, between the cap 40 and the pedestal 50, and between the pedestal 50 and the conduit 10.
Sealing materials 61 and 62 each made of an O-ring are also provided between the outer diameter of 0 and the outer diameter to seal.

The inner surface of the conduit 100 is sealed by a tube inner seal packing 20, and the inner diameter portion of the sleeve 10 is sealed from the outside by a cap 40 made of a cap nut, a pedestal 50, and sealing materials 60, 61, 62.

With the above structure, the conduit closing plug of the present invention completes the sealing around the plug of the lining 101 provided on the inner wall of the conduit 100 by a simple operation, so that the lining back The fluid is prevented from entering the inside, and the peeling of the lining 101 does not proceed.

If the main screw 33 and the cap screw 34 of the core body 30 are reverse screws, the pedestal 50 becomes a reaction force supporting device by screwing the cap 40 into the cap screw 34.
Is preferable because it has the effect of pulling up the core body 30.

[Embodiment] FIGS. 1 and 2 show an embodiment of a plug for closing a perforated portion of a conduit according to the present invention. FIG. 1 is a vertical cross-sectional view showing a state in which the hole closing plug of the present invention is attached to a conduit, and FIG. 2 is an exploded view of the hole closing plug of the embodiment of the present invention.

The plug of the embodiment includes a sleeve 10, a tube inner side seal packing 20, a core body 30, a cap 40, and a pedestal 50.

The sleeve 10 has an outer diameter formed with a screw 11 that is screwed into the internal thread 102 of the perforated portion of the conduit 100. The length of this screw 11 is conduit
Determined by a wall thickness of 100. The base of the screw 11 is provided with a notch 12 that regulates the screwing position,
Specifies the screwing position of. The sleeve 10 is provided with a portion having a spanner on its outer diameter at a portion 15 of its main body in order to screw the male screw 11 into the female screw 102 provided in the conduit 100.

The inner part of the tube of the sleeve 10 has a tapered conical head 13
Is provided. The taper head portion 13 is formed by expanding the diameter of the tube inner side seal packing 20 so as to form a seal portion.

The sleeve 10 is provided with a screw 16 on its inner diameter. This screw 16 is screwed with a main screw 33 of a core body 30 described later. The tail end portion of the sleeve 10 is covered with a cap 40, which will be described later, and forms a sealing surface 14 that seals with the surface of the cap 40.

Next, the tube inner side seal packing 20 is made of an elastic material such as rubber or elastomer that is not corroded by gas, and has a substantially ring shape. A taper portion 22 that is pressed against the lining 101 of the inner diameter of the conduit to form a seal portion is provided on the inner diameter. The tube inner seal packing 20 has an outer diameter 21 such that the outer diameter 21 can be inserted into the inside of the conduit 100 through a hole provided in the conduit 100. However, it is not necessary to be smaller than the hole, and since it is an elastic material, it can be deformed and
Anything that can be pushed into 100 is acceptable.

End face 23 and inner diameter chamfer 22 on both sides of the pipe inner seal packing 20
Are the inner surface 32 of the flange of the core body 30 and the conduit 10 respectively.
The inner surface of 0 is in contact with the portion of the lining 101 to form a seal portion.

The core body 30 has a flange 31 attached to a portion located inside the conduit, and a main screw threaded to the inner diameter of the sleeve 10 at an intermediate portion.
33 is provided, and a cap screw 34 is provided at the tail end portion.

In this embodiment, the main screw 33 of the core body 30 and the cap screw 34 are reverse threads, and the cap screw 34 has a finer pitch than the main screw 33. This is this cap screw
When the cap 40 is put on the 34 and tightened, the main screw 33 automatically operates in the direction to pull up the core body, and acts so as to tighten the pipe inner seal packing 20 more tightly. is there.

The pedestal 50 has a ring shape as shown in FIG. 2 and a sleeve.
It has an inner diameter 53 that is greater than the outer diameter of 10. Lower surface 54 is conduit 100
The outer diameter of the sealing material 62 is the same as that of the sealing material 62, and the sealing groove 52 of the sealing material 62 is formed. Further, the upper surface 55 forms a seal portion via the sealing surface 43 of the cap 40 and the sealing material 61, and is provided with a circumferential groove 51 into which the sealing material 61 is inserted.

The cap 40 is a cap nut having an internal thread 41 on the inner diameter of which the internal thread 41 is screwed into the cap screw 34 of the core body 30. The cap 40 is located at the tail end of the sleeve 10. The cap 40 has such a shape that a spanner for screwing the outer diameter portion 44 is applied to the cap 40, and the surface 42 that abuts the sealing surface 14 of the sleeve 10 via the sealing material 60 and the upper surface 55 of the pedestal 50. And a surface 43 that abuts via the sealing material 61.

Next, a method of using the embodiment of the present invention will be described. In the above parts, first, the tube inner seal packing 20 is externally fitted to the core body 30,
The main screw 33 of the core body 30 is screwed into the female screw 16 of the sleeve 10. Insert the sleeve 10 in this state into the hole of the conduit 100.
Screw in the screw 11.

This screwing position is such that when the pipe inner seal packing 20 is fitted on the pipe inner diameter side, the taper head 13 hits the chamfered portion of the inner diameter of the pipe inner seal packing 20, and the pipe inner seal packing 20 becomes the pipe inner surface lining 101. Is also positioned so as to be crimped.

Next, the core body 30 is pulled up. In this case, cap 40
If you screw it into the cap screw 34 and rotate the cap 40,
Since the main screw 33 is screwed into the inner diameter female screw 16 of the sleeve 10, the core body 30 rises inside the sleeve 10 by the main screw 33.
Therefore, the flange 31 at the tip of the core 30 presses the pipe inner seal packing 20 onto the head 13 of the sleeve 10 and the lining 101 of the pipe 100, and the pipe inner seal packing 20 is
The inner surface of the pipe is sealed by crushing and deforming as shown in the figure. Further tightening the cap 40 will complete this seal.

In this case, since the pipe inner side seal packing 20 has an appropriate hardness and shape, the lining 101 of the inner diameter of the conduit 100, the taper head 13 of the sleeve 10, and the flange 31 of the core body 30 are formed. Securely contact the three to seal the fluid in the tube. Therefore, the fluid in the pipe does not penetrate into the back surface of the lining or around the hole formed in the conduit, and this portion is completely protected.

Further, since the cap 40 seals the inside of the sleeve through the sleeve 10, the sealing material 60, the pedestal 50 and the sealing materials 61 and 62,
After all, this plug can completely block the inside of the pipe from the outside.

Such a perforated portion closing plug of the present invention has a small number of parts, is extremely easy to assemble, and has a reliable sealing action.

[Effect of device]

Conventionally, when the hole provided in the conduit is closed, the protection of the lining in the pipe is not sufficient, and therefore, there is a possibility that the peeling of the lining may progress, but according to the present invention, this can be completely prevented. . Also, the inside of the conduit and the outside are completely sealed.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a state in which a plug according to an embodiment of the present invention is completely attached to a conduit, and FIG. 2 is an exploded view of a perforated portion closing plug of the conduit of the present invention. 10 …… Sleeve, 20 …… Pipe inner seal packing 30 …… Core body, 40 …… Cap 50 …… Pedestal, 100 …… Conduit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideki Ogi, 1-35, Asasei Seiki Co., Ltd., 1-35, Kase-cho, Nakagawa-ku, Nagoya, Aichi Prefecture (72) Creator: Akira Kamide 7-6, Baishashi-cho, Tennoji-ku, Osaka-shi, Osaka No. Stock Company Osaka Waterproof Construction Co., Ltd. (56) References

Claims (1)

[Scope of utility model registration request] 1. A plug for sealing a perforated portion formed in a pipe wall of a conduit, the plug comprising a sleeve, a pipe inner seal packing, and
The sleeve has a core body, a pedestal, and a cap, and the sleeve has an external thread having an external thread to be screwed into an internal thread of a perforated portion of the conduit, an internal thread having an internal thread, and a tube inner end having the tube inner seal packing. Is a ring having a taper head that abuts against, and the pipe inner seal packing is a ring that is made of an elastic material and has a chamfered portion that is crimped to the lining of the inner surface of the conduit in the inner diameter, and the core body is A main screw and a cap screw to be fitted, the outer diameter of the pipe inner end is smaller than the inner diameter of the female screw of the perforated portion of the conduit, and the flange has a contact with the pipe inner end surface of the pipe inner seal packing. , The inner diameter is larger than the outer diameter of the sleeve, the lower surface is seated on the outer diameter of the conduit via a sealing material, and the upper surface is a ring that contacts the sealing surface of the cap via the sealing material, and the cap is A cap nut having a female screw that is screwed with a cap screw, and a cap nut having two sealing surfaces that come into contact with the tail end of the sleeve and the upper surface of the pedestal through a sealing material, respectively. plug.