JPH0575597U - Cut end face of pipe Corrosion resistant core - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to obtain a corrosion resistant core for a cut end surface of a pipe which can be very quickly repaired when the cut end surface of a pipe is repaired on site. [Structure] A first rubber ring 2 that abuts on an end surface A1 of an insertion tube A, and a second rubber ring 3 that abuts on an inner wall B1 corresponding to an end surface of the insertion tube B located at the back. Are integrally connected by a thin-walled rubber tubular body 4 having a cross section curved in the pipe axis direction, and the end face A1 of the insertion pipe A is formed by the elasticity of each rubber component member.
Improves adhesion to and seals the end face.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cut end surface anticorrosion core for a pipe, and more particularly to a cut end surface anticorrosion core for a pipe used to protect a cut end surface of a pipe.

[0002]

[Prior Art]

 When laying pipelines for waterworks, etc., metal pipes such as cast iron pipes of a certain length, one of which is the receiving port and the other of which is the inserting port, are sequentially connected while connecting, but the length is adjusted at the end of the pipeline. In some cases, it may be necessary to cut the end of the pipe on the insertion side during on-site construction. In this case, the cut end surface of the metal pipe exposes the metal part, so it is necessary to apply corrosion-prevention means.The conventional corrosion-prevention means was to brush the exposed metal surface with anticorrosion paint such as epoxy resin paint. .

[0003]

[Problems of conventional technology]

 However, ordinary anticorrosive paints such as the above epoxy resin paints have a long curing time, and due to the demand for shortening the construction period, it is necessary to join the pipes before the paint is sufficiently cured, and the coating film thickness is 100 μm or less. In combination with the thinness, there was a problem that corrosion resistance remained after construction.

[0004]

[Problems to be solved by the device]

 In view of the above-mentioned problems, the present invention has been made with the object of providing a corrosion resistant core for a cut end surface of a pipe that can be extremely fast in the case of repairing the cut end surface of a pipe in the field and can completely perform corrosion protection. It is a thing.

[0005]

[Means for Solving the Problems]

 That is, the cut end anticorrosion core of the pipe of the present invention comprises a first rubber ring that abuts on the end face of the insertion pipe and a second rubber ring that abuts on the inner wall corresponding to the end face of the insertion pipe behind the pipe receiving port. It is characterized in that it is integrally connected to the rubber ring by a thin-walled rubber cylinder whose cross section is curved in the pipe axis direction.

[0006]

【Example】

 Next, an embodiment of this invention will be described. FIG. 1 is a partially cutaway side view of an embodiment of the present invention, FIG. 2 is a front view of the embodiment, and FIGS. 3 and 4 are side sectional views of essential parts showing a usage state of the embodiment.

The cut end surface anticorrosion core 1 of the pipe of the present invention comprises a first rubber ring 2 abutting against the end face A1 of the insertion pipe A and an inner wall B1 corresponding to the end face of the insertion pipe behind the pipe receiving port B. And a second rubber ring 3 which is abutted against the thin rubber cylinder 4 whose cross section is curved in the tube axis direction.

In the above-described embodiment, the first rubber ring 2, the second rubber ring 3 and the thin rubber cylinder 4 are integrally formed of a rubber material having excellent durability such as SBR and EPDM. Further, although the thin rubber cylinder 4 is curved in the convex direction with respect to the pipe axis in the case of the drawing, the present invention is not limited to this, and it may be curved in the concave direction with respect to the pipe axis. good. The shape of the convex or the concave is appropriately determined according to the pipe type in consideration of the difference between the internal pressure and the external pressure.

[0009]

[Action]

 As shown in FIGS. 3 and 4, the cut end face anticorrosion core 1 of the pipe of the present invention is moved to the receiving port B together with the inserting pipe A so that the first rubber ring 2 is brought into contact with the end face of the inserting pipe A. The second rubber ring 3 is brought into contact with the inner wall B1 at the back of the pipe receiving port B, and then the insertion pipe A is inserted and pressed into contact therewith. In any case, the cut end face anticorrosion core 1 of the pipe is compressed and inserted between the end face A1 of the insertion pipe A and the inner wall B1 behind the pipe receiving port B.

At this time, the second rubber ring 3 supported by the inner wall B1 of the receiving port and the first rubber ring 2 pressed by the elasticity of the thin rubber tubular body 4 come into close contact with the tube end surface A1. The exposed portion of the cut end face is sealed by the close contact force. Also, as shown in FIG. 4, even if a gap is created between the pipe end A1 and the inner wall B1, if the thin rubber cylinder body 4 is within the elastic expansion and contraction range, the above-mentioned adhesive force does not decrease and The ring maintains close contact with the pipe end A1.

[0011]

[Effect of the device]

 According to this invention, when the insertion pipe is cut and connected as described above, the cut end face anticorrosion core 1 of the pipe prepared in advance is applied without connecting the end face with the anticorrosion paint. It is possible to prevent corrosion of the pipe end surface by itself, and it is possible to completely save the labor of painting and drying, and the pipe connection work can be done very quickly. Further, the cut end surface anticorrosion core 1 of the present invention has a possibility that even if the pipe path is slightly bent, the thin-walled rubber tubular body 4 is deformed following the deformation, so that the adhesiveness is not deteriorated even if the ground change occurs. Further, the cut end surface anticorrosion core 1 for a pipe of the present invention has various practical effects such that it is easy to manufacture because it has a simple structure and can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an embodiment of the present invention.

FIG. 2 is a front view of an embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view of essential parts showing a usage state of the embodiment.

FIG. 4 is an enlarged sectional view of an essential part showing a usage state of the embodiment.

[Explanation of symbols]

 1 Cut end face of pipe Corrosion resistant core 2 First rubber ring 3 Second rubber ring 4 Thin rubber cylinder A Insertion pipe A1 End face B Pipe receiving port B1 Inner wall corresponding to the insertion pipe end face

[Procedure amendment]

[Submission date] December 1, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Item name to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

Claims (1)

[Scope of utility model registration request] 1. A cross-section of a first rubber ring abutting on the end face of the insertion pipe and a second rubber ring abutting on the inner wall corresponding to the end face of the insertion pipe at the back of the pipe receiving section A cut end face anticorrosion core for a pipe, which is integrally connected by a thin-walled rubber tubular body that is curved in the axial direction.