JPH0654995U - Metal tube end face anti-corrosion rubber - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a metal pipe end face anti-corrosion material that contributes to rapid pipe laying work by enabling extremely fast pipe end corrosion protection when cutting and connecting metal pipes. To aim. [Structure] A reverse taper-shaped short section in which an inner peripheral edge 1B of a ring-shaped body 1A having substantially the same inner and outer diameters r and R as the end surface 2A of the metal tube 2 is gradually expanded from the inner diameter r of the metal tube 2 toward the end. A cover member 1D in which a tubular body 1C is integrally formed and wholly made of a rubber material, and a closed-cell foam body which has substantially the same inner and outer diameters r and R as the end surface 2A of the metal tube 2 and which is elastic The metal pipe end surface 2A and the cover member 1D
Or a cushioning member 1E interposed between the ring-shaped body 1A and the ring-shaped body 1A, or the cushioning member 1E of the end face anticorrosion rubber 1 of the metal pipe is formed of an open-cell foam and is fitted to the pipe end portion. As a result, it can be installed with one touch, and the corrosion protection after that is completely achieved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an anticorrosion rubber for an end surface of a metal tube.

[0002]

[Prior art]

 Conventionally, metal pipes such as ductile pipes and cast iron pipes have been widely used as underground pipes. When laying these metal pipes, as shown in FIG. 4, the insertion port B1 of the connection pipe B is inserted into the receiving port A1 formed at the pipe end of the metal pipe A, and the periphery is sealed with the rubber ring C to connect. Things are done. In addition, D in the drawing indicates a push ring of the rubber ring C. By the way, in the connection work of these pipes, when adjusting the length of the pipe line, cut the insertion port B 1 to adjust the length L of the pipe, and insert it into the receiving port A 1 to lay it. However, since the metal material forming the pipe is exposed on the cut end surface of the insertion opening B1, it is necessary to separately perform anticorrosion work on this portion, and in the past, this cut end surface was subjected to anticorrosion coating.

[0003]

[Problems of conventional technology]

 However, in the case of the above-mentioned anticorrosion means, the anticorrosion paint needs to be sufficiently dried and hardened before the pipe connection, and there is a problem that the construction period cannot be shortened because the construction must be interrupted during the curing period. In order to solve such problems, it is possible to cure the anticorrosion coating early by heating, etc., but this type of metal pipe usually has an anticorrosion coating on its inner surface, which may be corroded by heat. Such coating means cannot be adopted.

[0004]

[Problems to be solved by the device]

 In view of the above problems, the present invention provides a metal pipe end face anti-corrosion material that can very quickly prevent corrosion of the pipe end when cutting and connecting the metal pipe, which contributes to quick pipe laying work. It was made for the purpose.

[0005]

[Means for Solving the Problems]

 That is, the metal pipe end face food preventive material of the present invention is located on the inner peripheral edge 1B of the ring-shaped body 1A having substantially the same inner and outer diameters r and R as the end face 2A of the metal pipe 2 and from the inner diameter r of the metal pipe 2 toward the end. A cover member 1D made entirely of rubber and integrally formed with an inversely tapered short cylindrical body 1C having a gradually expanded diameter, and an inner and outer diameters r and R substantially the same as the end surface 2A of the metal tube 2 are formed. Is formed of an elastic closed-cell foam and comprises a cushioning member 1E interposed between the end surface 2A of the metal tube 2 and the ring-shaped body 1A of the cover member 1D. is there.

[0006]

【Example】

 Next, an embodiment of this invention will be described. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, and FIG. 3 is a sectional view showing a usage state of the embodiment.

The end surface anticorrosion rubber 1 of the metal tube of the present invention has an inner peripheral edge 1B of a ring-shaped body 1A having substantially the same inner and outer diameters r 1 and R 2 as the end surface 2A of the metal tube 2 from the inner diameter r of the metal tube 2 to the end. Next, a cover member 1D, which is integrally formed of a reversely tapered short tubular body 1C having an enlarged diameter, is entirely made of a rubber material, and the end surface 2A of the metal tube 2 has substantially the same inner and outer diameters r and R. The entire body is formed of a closed-cell foam having elasticity and is composed of a cushioning member 1E interposed between the end surface 2A of the metal tube and the ring-shaped body 1A of the cover member 1D. In the above embodiment, the cushioning member 1E is made of a soft rubber or synthetic resin foam having independent cells. In the above embodiment, the cushioning member 1E may be formed of an open-cell foam and impregnated with an adhesive that adheres to the metal surface.

[0008]

[Action]

 The metal pipe end face anti-corrosion material 1 of the present invention is formed on the end face 2A of the metal pipe 2 having the exposed metal surface as shown in FIG. 3 after the cushioning member 1E and the cover member 1D are combined as shown in FIG. Insert it.

Since the end surface anticorrosion rubber has a shape that abuts the end surface obliquely so as to be easily adhered to the end surface portion of the pipe, the ring-shaped body of the cover member 1D is provided even if the end surface and the inner surface of the metal tube are slightly uneven. Due to the elasticity of 1A and the short tubular body 1C, they adhere to each other without a gap. Further, since the short tubular body 1C is formed in an inverse taper shape, it strongly adheres to the inner surface of the pipe end by the compressive deformation force and absorbs the inner diameter tolerance of the pipe.

Since the cushioning member 1E is a closed-cell foam, the cushioning member 1E is compressed and deformed between the ring state 1A and the pipe end surface 2A to maintain watertightness, and the internal liquid does not penetrate.

It should be noted that an adhesive may be impregnated as the buffer member 1E. In this case, the adhesive bonds the pipe end surface 2A and the buffer member 1E to prevent water from penetrating after curing, and to prevent curing. Since the space is shielded from the internal liquid by the rubber cover member 1D, the internal liquid is not contaminated.

[0012]

[Effect of device]

 As described above, according to the end surface anti-corrosion rubber 1 for a metal pipe of the present invention, when the cut pipe end face is applied and inserted into the receptacle, the exposed metal face is completely sealed and the pipe end face is protected against corrosion. As a result, it is possible to completely eliminate the work of waiting for anticorrosion coating and coating curing and drying as in the past, and the construction can be done quickly. In addition, since it has a simple shape, it has various practical effects such as easy manufacture and low cost.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a left side view of FIG.

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

FIG. 4 is an explanatory cross-sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... End surface of metal tube Anticorrosion rubber 1A ... Ring-shaped body 1B ... Inner peripheral edge 1C ... Short cylindrical body 1D ... Cover member 1E ... Buffer member r ... Inner diameter R ... Outer diameter 2 ... Metal tube 2A ... End surface

Claims (1)

[Scope of utility model registration request] 1. An inner and outer diameter r substantially the same as the end surface 2A of the metal tube 2,
The inner peripheral edge 1B of the ring-shaped body 1A having R is integrally formed with an inversely tapered short tubular body 1C whose diameter is gradually increased from the inner diameter r of the metal tube 2 toward the end. The cover member 1D and the end surface 2A of the metal tube 2 are formed of a closed-cell foam having substantially the same inner and outer diameters r and R as the whole, and have a ring shape of the end surface 2A of the metal tube 2 and the cover member 1D. Cushioning member 1 inserted between body 1A
An end face anticorrosion rubber for a metal tube, which is characterized by comprising E and E.