JPH04138195U - Anti-corrosion core on inner surface of tube end - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to provide a corrosion-protective core for the inner surface of a tube end that is highly water resistant and easy to insert. [Structure] A sealing member in which a plurality of annular fins 3...3 continuous in the circumferential direction are provided at predetermined intervals in the axial direction on the outer surface of a cylindrical body 2 having rubber-like elasticity and having a diameter slightly smaller than the inner diameter of the connected pipes A and B. 4 and a metal cylinder 6 having an axially continuous cutout 5 on the inner surface of the cylinder 2 of the seal member 4 are coaxially fitted together, and the cutout 5 allows radial deformation.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to an anti-corrosion core on the inner surface of the tube end of a cut tube.

0002

[Conventional technology]

When constructing cast iron pipes, the length may be adjusted by cutting the pipe depending on the installation situation. Ru. At this time, the cast iron base of the pipe is exposed at the end of the cut pipe, so corrosion protection is required. In the past, anti-corrosion paint was used for repairs. However, no matter how high-quality paint is used, this anti-corrosion coating must be applied on-site, so it cannot be completed completely. It is difficult to obtain a complete coating, and the application conditions may require advanced methods such as baking. There was a drawback that the durability of the coating film was low because there was no coating. As a solution to this problem, a socket formed at the end of the pipe as shown in Figure 4 has been proposed. Insert socket B into A, insert seal ring C, press the seal with press ring D, Rubber that makes the joint part watertight and has fins E1...E1 on the inner surface of the joint part. A tube end consisting of a tube E2 and a metal tube E3 made of stainless steel or the like as its lining material. The inner surface anti-corrosion core E was fitted to prevent corrosion of the end face of the insertion opening B, etc.

0003

[Problems with conventional technology]

However, cast iron pipes have a certain degree of tolerance in pipe diameter, so this dimensional difference may cause It may be difficult to attach the anti-corrosion core securely, and the reliability of anti-corrosion may be compromised. There were some shortcomings that were not enough.

0004

[Problems that the invention aims to solve]

In view of the above-mentioned problems, this idea was developed to provide an anti-corrosion coating on the inner surface of the tube end, which is highly water resistant and easy to insert. This was done for the purpose of providing a.

[0005] In other words, the anti-corrosion core on the inner surface of the pipe end of this invention has a rubber diameter slightly smaller than the inner diameter of the pipe to be connected. Circumferentially continuous annular fins are placed at predetermined intervals in the axial direction on the outer surface of the cylindrical body with elasticity. A plurality of sealing members are provided in the cylindrical body of the sealing member, and a plurality of sealing members are provided on the inner surface of the cylindrical body of the sealing member. It is characterized by a metal cylinder having a cutout and coaxially fitted together. Ru.

[0006]

【Example】

Next, an example of this invention will be described. Figure 1 is a longitudinal cross-sectional view of an embodiment of this invention, Figure 2 is a cross-sectional view of an embodiment, and Figure 3 is a metal It is a perspective view of a cylinder. The anti-corrosion core 1 on the inner surface of the pipe end of this invention has a diameter slightly smaller than the inner diameter of the pipes A and B to be connected. An annular fin 3...3 continuous in the circumferential direction on the outer surface 2A of the cylinder body 2 having rubber-like elasticity is attached to the axis. A plurality of seal members 4 are provided at predetermined intervals in the direction, and the inner surface of the cylinder 2 of the seal member 4 A metal cylinder 6 having a continuous cutout 5 in the axial direction is coaxially fitted together. It is. In the above embodiment, the cutout 5 of the metal cylinder 6 is straight in the axial direction, and as shown in FIG. They may be provided in a zigzag pattern as shown. The metal cylinder 6 is made of a corrosion-resistant metal, for example, stainless steel. In addition, in the above embodiment, 3A in the figure indicates a stopper that comes into contact with the tube end portion. , which protects against corrosion by being in close contact with the end surface of the tube.

[0007]

[Effect]

When connecting pipes using the tube end inner surface anticorrosion core 1 of this invention, the metal lining material Since the metallic cylinder body 6 is cut in the axial direction, it can be easily deformed in the radial direction. , when the incision line is zigzag as shown in Fig. 2, the incision 5 is straight in the axial direction. Since it is not continuous, deformation of the rubber-like elastic cylinder 2 occurs along this part. It has the advantage of being resistant to water leakage even when exposed to water.

[0008]

[Effect of the idea]

As explained above, this invention is based on the lining material of the sealing member 4 having rubber-like elasticity. Since the metal tube 6 is cut in the axial direction, deformation in the radial direction is not possible. It is easy to perform and can be inserted manually, and the metal tube 6 that tends to expand after insertion is A positive seal is achieved by the impact force. In addition, when the incision 5 is made into a zigzag shape Since the deformation of the sealing member along the incision 5 becomes discontinuous in the axial direction, water leakage occurs. It has the effect of being less likely to occur.

[Brief explanation of drawings]

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

FIG. 2 is a cross-sectional view of an embodiment of the invention.

FIG. 3 is a perspective view of a main part of the metal cylinder of the embodiment.

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

[Explanation of symbols]

1 Anti-corrosion core on inner surface of tube end 2 Cylindrical body with rubber-like elasticity 3 Annular fin 4 Seal member 5 Incision 6 Metal cylinder

Claims (2)

[Scope of utility model registration request] 1. A sealing member comprising a plurality of circumferentially continuous annular fins provided at predetermined intervals in the axial direction on the outer surface of a cylindrical body having rubber-like elasticity and having a diameter slightly smaller than the inner diameter of a pipe to which the sealing member is connected. A tube end inner surface anti-corrosion core characterized in that a metal tube having an axially continuous cutout on the inner surface of the tube is coaxially fitted together. 2. The anti-corrosion core for the inner surface of a tube end according to claim 1, wherein the cutout provided in the metal tube has a zigzag shape.