JPH053787U - Closure plug for conduit hole with pipe mounting hole - Google Patents

Abstract

(57) [Abstract] [Purpose] When a part of the conduit 100 is repaired, holes are made in the conduits upstream and downstream of the repair part, and those for sealing the inside are inserted from these holes to shut off the repair part. Repair. In order to protect the lining 101 in the conduit when closing such a hole, a plug having a penetrating rod 30 configured to crimp the seal member 20 inside the pipe is used. The plug was improved so that it could also be used for branch pipe installation. [Structure] A hollow hole 35 is provided in a through rod 30 for crimping an in-tube sealing member that constitutes a plug, and a branch pipe mounting through hole 45 is provided in a cap 40 of the plug.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a closing plug for a perforated part formed in a lined conduit, and more specifically, when repairing a part of the conduit, repair the holes drilled in the upstream and downstream conduits. It relates to a closing plug that seals after completion.

[0002]

[Prior Art]

 When repairing a part of a conduit, perforate the pipe wall of the upstream and downstream conduits, insert a bag into the pipe from this perforation, inflate the bag to interrupt the flow of fluid and shut off it. Repair conduits in the section. In some cases, the upstream and downstream sides will be connected by a bypass pipe to carry out repair work without restricting the use of fluid on the downstream side. Such a technique is disclosed in, for example, Japanese Patent Laid-Open No. 63-297894.

After the above repair work is completed, the hole drilled in the pipe wall must be closed. Conventionally, the closure of the perforation has been done by providing a female screw in the perforation of the pipe wall and screwing the plug into it. In such a conventional perforated portion, the lining inside the pipe around the plug is peeled off by the perforation process, and since this portion is not sealed, there is a problem that peeling progresses to that portion and its adjacent portion.

The present applicants solve the above-mentioned drawbacks by using a plug that closes the perforated portion formed in the wall of the conduit at the time of such repair work of the conduit, and (1) the inner diameter of the conduit around the plug. Seal the lining part. (2) This seal is reliable and prevents the lining from peeling off. (3) Work is easy. (4) There is no problem with corrosiveness or durability. A plug for closing a perforated portion of a conduit having an excellent performance for achieving the above has been proposed (Application No. 2-016138). As shown in Fig. 2, the contents consisted of a combination of the following technical means. (A) A plug for sealing a perforated portion formed in the pipe wall of the conduit 100, the plug including a sleeve 10, a pipe inner side seal packing 20, a penetrating rod 30, a cap 40, and a pedestal 50. It consists of and. (B) The sleeve 10 has an external thread having an external thread to be screwed into the internal thread of the perforated portion of the conduit, an internal thread having an internal thread, and an inner tip of the tube having a tapered head portion against which the inner tube seal packing abuts. It has a hollow cylindrical shape. (C) The pipe inner seal packing 20 is a ring-shaped packing that seals the lining portion around the perforated portion in the conduit, and is made of an elastic material. The shape is a ring having an inner diameter with a chamfered portion that is crimped to the surface of the lining 101 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 body described below, an outside of the tube that has a surface that comes into contact with the lining surface inside the tube, and has the chamfered portion on the inside It (D) The penetrating rod 30 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. Has a flange that comes into contact with the inner end surface of the pipe. (E) The pedestal 50 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 guide tube through the seal material, and the upper surface is the seal surface of the cap through the seal material. Abut. (F) The cap 40 is a cap nut that has a female screw that is screwed into the cap screw, and that has two sealing surfaces that come into contact with the tail end of the sleeve and the pedestal via sealing materials. By installing this cap nut, each part of the closing plug is finally completely sealed.

[0005]

[Problems to be solved by the device]

 The present invention has developed a technique for mounting a pipe by using such a closing plug.

[0006]

[Means for Solving the Problems] That is, the present invention is an improvement of the closing plug configured as described in (a) to (f) above. The improvement points are as follows. (A) The penetrating rod 30 is configured to have a hollow hole penetrating along its axis. (B) The cap was provided with a pipe mounting hole penetrating to the outside. This pipe mounting hole is preferably a hole provided with a pipe screw, and when the pipe is not mounted, a blind plug may be screwed in to cover it.

[0007]

[Action]

 INDUSTRIAL APPLICABILITY The conduit hole closing plug provided with the pipe mounting hole of the present invention can be used for various purposes such as mounting a pipe to form a new conduit, or a sampling hole, a pressure or flow rate measuring hole. .

[0008]

【Example】

 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 the 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 packing 20 is externally fitted to the tapered portion of the head portion of the sleeve 10 on the inner side of the tube. The packing 20 is pressed against the lining 101 on the inner surface of the conduit 100 by the flange of the penetrating rod 30.

The penetrating rod 30 is designed so that the leading end of the penetrating rod 30 pushes the packing 20 against the inner surface of the conduit to seal the portion by screwing up the main screw which is screwed into the female screw of the inner diameter of the sleeve 10. A cap 40 is attached to the tail end of the penetrating rod 30. The abutting end surfaces of the cap 40, the sleeve 10 and the pedestal 50 are sealed with an O-ring.

[0010]

Since the seal around the plug of the lining 101 provided on the inner wall of the conduit 100 is completed, fluid is prevented from entering the back surface of the lining and the peeling of the lining 101 may proceed. Absent.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a plug according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a prior art.

[Explanation of symbols]

 10 Sleeve 20 Tube Inner Packing 30 Through Rod 35 Hollow Hole 40 Cap 45 Through Hole 50 Pedestal 100 Conduit

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Yutaka Sugiki 19-18 Sakuradacho, Atsuta-ku, Nagoya-shi Toho Gas Co., Ltd. (72) Hideki Ogi 35 35-1, Asasehi Seiki Co., Ltd., Nakagawa-ku, Nagoya-shi (72) Creator Akira Kamide 7-6, Eizashi-cho, Tennoji-ku, Osaka City Osaka Waterproof Construction Co., Ltd.

Claims (1)

[Claims for utility model registration] 1. A plug used for a perforated portion formed in a pipe wall of a conduit, wherein a penetrating rod that presses seal packing inside the pipe and projects to the outside of the pipe; A sealing cap for covering the outside of the conduit, wherein the penetrating rod is provided with a hollow through hole, and the cap is provided with a pipe mounting hole. plug.