JPH0682497U - Anticorrosion rubber for pipe end face at pipe connection - Google Patents

Abstract

(57) [Summary] [Purpose] When connecting cut metal pipes, the labor of anticorrosion coating can be saved, quick connection work can be performed, and corrosion protection rubber at the pipe connection surface is highly reliable. The purpose is to provide. [Structure] Pipe end faces A1 of metal pipes A butted to each other
A pair of ring bodies 1 made of an elastic material and applied to
A and 1A and the bellows body 1 in which the inner diameter r of the metal pipe and the inner diameter r of the envelope for coaxially connecting the ring bodies 1A and 1A are substantially the same.
B and the short tubular bodies 1D, 1 which extend from the inner surfaces of the ring bodies 1A, 1A along the respective inner surfaces of the metal pipes A, A, and have a terminal outer diameter slightly larger than the inner diameters of the metal pipes A, A.
The bellows body 1B is provided with at least one through hole 1E, and corrosion protection is achieved only by fitting it to the cut metal pipe end surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe end face anticorrosion rubber in a pipe connecting portion.

[0002]

[Prior art]

 Conventionally, when a metal pipe is connected to form a pipe line, a metal pipe A having a predetermined length is cut as shown in FIG. 4, the metal pipes A and A are butted, and the outer periphery thereof is colored. -Or the joint ring B may be fitted and connected. In this case, since the metal surface is exposed on the pipe end surface A1 of the metal pipe A, it may be corroded by the internal fluid, and in order to prevent this, conventionally, the metal exposed portion is covered with a one-component epoxy coating or other anticorrosion paint. On-site painting of C was done.

[0003]

[Problems of conventional technology]

 However, in the case of the above-mentioned construction, it is necessary to wait until the anticorrosive paint C is hardened, and there is a drawback that it takes time to connect the pipes. Furthermore, since painting is a manual work, a sufficient film thickness may not be obtained, There was a drawback that the long-term anticorrosion performance was not reliable. Furthermore, in cold regions, the coating is difficult to harden and the workability is even worse, and there is also the problem of reliability in anticorrosion performance.

[0004]

[Problems to be solved by the device]

 In view of the above problems, this invention eliminates the need for anticorrosion coating when connecting a cut metal pipe, enables quick connection work, and has high reliability in corrosion protection. It was made for the purpose of providing rubber.

[0005]

[Means for Solving the Problems]

 That is, the pipe end face anticorrosion rubber 1 in the pipe connection portion of the present invention is a pair of ring members 1A, 1A made of an elastic material, which are applied to the pipe end faces A1 of the metal pipes A butted against each other, and the ring members 1A, The bellows body 1B that coaxially connects the 1A and the metal tube inner diameter and the envelope inner diameter r are substantially the same, and the inner surfaces of the ring bodies 1A and 1A extend from the inner surfaces of the metal tubes A and A, respectively, and It is characterized in that the outer diameter of the end is made of the metal tube A and the short cylinders 1D, 1D slightly larger than the inner diameter of A, and the bellows body 1B is provided with at least one through hole 1E. To do.

[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 front view of the embodiment, and FIG. 3 is a sectional view showing a usage state of the embodiment.

The pipe end face anticorrosion rubber 1 in the pipe connection portion of the present invention comprises a pair of rings made of an elastic material such as synthetic rubber or plastic, which are applied to the pipe end faces A1 and A1 of the metal pipes A and A to be butted against each other. From the inner surfaces 1C of the ring bodies 1A and 1A, and the bellows body 1B that coaxially connects the ring bodies 1A and 1A and that has the metal tube A inner diameter and the envelope inner diameter r that are substantially the same. The metal pipes A and A are composed of short cylinders 1D and 1D which extend along the inner surface of the metal pipe A and whose outer diameter of the end is slightly larger than the inner diameter of the metal pipe A. At least one through hole 1E is formed in the bellows body 1B. It is provided and configured. The through holes 1E are for adjusting the water pressure inside and outside the pipe, and thus may be an appropriate number of 2 or more. Moreover, 1F and 1F in the figure show ring-shaped sealing materials provided as needed.

[0008]

[Action]

 When using the pipe end face anticorrosion rubber 1 in the pipe connecting portion of the present invention, as shown in FIG. 3, insert the short tubular bodies 1D, 1D into the pipe end faces A1, A1 of the pipes A, A to be connected. Fix only. At this time, since the outer diameters of the short tubular bodies 1D and 1D are slightly larger than the inner diameter of the metal tube A, the elasticity of the short tubular body 1D allows the short tubular bodies 1D and 1D to be snugly fitted and easily fixed. Further, since the pair of ring bodies 1A, 1A are connected by the bellows body 1B, even if there is a slight gap in the facing distance between the metal tubes A, A, the two are connected in series by elastic deformation.

Therefore, the end faces A1, A1 of the metal pipes A, A are reliably shielded from the fluid in the pipes by the pair of ring bodies 1A, 1A and the short cylindrical bodies 1D, 1D, thereby achieving corrosion protection. In this case, the reliability is further enhanced when the ring-shaped sealing materials 1F and 1F are inserted. After this, a collar or a joint ring B (a joint ring in the illustrated example) is externally fitted between both metal pipes A and A to complete the pipe connection. Since the bellows body 1B is provided with at least one through-hole 1E, the inner fluid flowing in from the bellows body 1B balances the inner surface of the joint ring B and the pipe internal pressure, and an unreasonable deformation pressure is applied to the bellows body 1B. Is prevented.

[0010]

[Effect of device]

 As described above, according to the pipe end face anticorrosion rubber in the pipe connecting portion of the present invention, when the metal pipe is cut and connected, the pipe end anticorrosion work is completed only by the fitting work, and waiting for the paint to harden. It also has various practical effects such that the complexity of having to pay attention to uniform coating and uniform painting can be completely eliminated, the pipe connection work is simplified, and the reliability of anticorrosion performance is improved.

[Brief description of drawings]

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

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

FIG. 3 is a cross-sectional view showing a usage state of the embodiment of the present invention.

FIG. 4 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pipe end surface anticorrosion rubber 1A ... Ring body 1B ... Bellows body 1C ... Ring body inner surface 1D ... Short cylinder body 1E ... Through hole 1F ... Ring-shaped sealing material A ... Metal tube A1 ... Pipe end surface

Claims (1)

[Scope of utility model registration request] 1. A pipe connecting portion in which metal pipes A, A having the same diameter are butted to each other and a collar or a joint ring B is externally fitted and connected to the outer periphery of the pipes. A pair of ring bodies 1A, 1A made of an elastic material, which are torn off, a bellows body 1B for coaxially connecting the ring bodies 1A, 1A and an inner diameter r of which is substantially the same as the inner diameter r of the metal tube, and the ring body. 1A, 1A extending along the respective inner surfaces of the metal pipes A, A, and the outer diameter of the end of the short pipe 1 slightly larger than the inner diameters of the metal pipes A, A
D and 1D, and the bellows body 1B is provided with at least one through-hole 1E.