KR20170054687A

KR20170054687A - Clamp for pipe

Info

Publication number: KR20170054687A
Application number: KR1020150157144A
Authority: KR
Inventors: 윤병영; 김현수; 이민정; 하준호
Original assignee: 삼성중공업 주식회사
Priority date: 2015-11-10
Filing date: 2015-11-10
Publication date: 2017-05-18

Abstract

Clamps for piping are introduced.
The piping clamp includes a body formed with a hole through which the piping passes, a body supporting the outer surface of the piping, and an indicator capsule mounted inside the body and filled with an indicator, And may include a jacket that discharges the indicator.

Description

CLAMP FOR PIPE}

The present invention relates to a pipe clamp.

In general, floating structures such as ships, drilling rigs, floating production storage offloading (FPSO) may be equipped with piping to transport working fluid such as gas or oil.

For example, drilling rigs are equipped with drilling equipment such as derrick, and lubrication oil can be provided through the piping for smooth operation of drilling drills that drill the seabed. At this time, since the piping must be fixed without shaking for the remote transfer of the lubricating oil, the piping can be fixed by the clamp.

The clamps are installed at regular intervals along the longitudinal direction of the piping according to the ship design regulations to firmly support the piping. In the case of piping extending to the basement of several tens to several hundred meters or less, it is difficult to maintain, If the piping is damaged due to corrosion or the like, there is a possibility that the working fluid leaks from the damaged part. Therefore, it is necessary to thoroughly control the corrosion of the piping and piping clamps.

Conventionally, in the case of a pipe clamp, the pipe has a structure in which a large area is in contact with the outer circumferential surface of the pipe in order to improve the bearing capacity. Crevice corrosion may occur in the pipe circumferential surface in contact with the pipe clamp. Crevice corrosion is an electrochemical corrosion caused by a difference in the concentration of ions in an electrolyte solution in a gap between metals or metals and other materials.

When the crevice corrosion on the outer circumferential surface of the pipe contacting the pipe clamp is progressed, the crevice corrosion can be left as it is because it is not visually confirmed, and as a result, a hole may be generated in the pipe due to crevice corrosion .

Patent Document: Korean Registered Patent No. 10-1422171 (Registered on July 16, 2014)

Embodiments of the present invention provide a piping clamp capable of recognizing a crevice corrosion state of a piping through an indicator discharged from an indicator capsule.

According to one aspect of the present invention, there is provided a clamp for a pipe, comprising: a body having a hole through which the pipe passes, the pipe supporting the outer surface of the pipe; And an indicator capsule mounted inside the body and filled with an indicator, wherein the indicator capsule may include a shell for discharging the indicator according to an external pH change.

At this time, the shell of the indicator capsule may include a pH-sensitive hydrogel for discharging the indicator when the hydrogen ion concentration (pH) is low.

In addition, the pH-sensitive hydrogel may be a polymer membrane that provides a mesh structure that swells when the hydrogen ion concentration (pH) is low.

In addition, the indicator may include a dye that provides a specific color to allow the user to recognize the corrosion state of the pipe.

In addition, the body may include a plurality of partitions spaced apart from each other in the longitudinal direction of the pipe to support the outer surface, and between the plurality of partitions, the placement recess may be formed in which the indicator capsule is mounted.

In addition, the body may be made of at least a part of transparent synthetic resin so that the indicator can be recognized from outside.

Embodiments of the present invention are advantageous in that when the hydrogen ion concentration around the piping is lowered due to the corrosive exposure of the piping, the indicator in the indicator capsule is discharged to the outside, thereby promptly informing the user of the crevice corrosion state of the piping have.

1 is a perspective view illustrating a pipe clamp according to an embodiment of the present invention.
2 is an exploded perspective view showing a pipe clamp according to an embodiment of the present invention.
3 is a plan view showing a pipe clamp according to an embodiment of the present invention.
Fig. 4 is a cross-sectional view cut along the "AA"

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION The following description is one of many aspects of the claimed invention and the following description may form part of the detailed description of the invention. However, the detailed description of known configurations or functions in describing the present invention may be omitted for clarity.

While the invention is susceptible to various modifications and its various embodiments, it is intended to illustrate the specific embodiments and the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

And terms including ordinals such as first, second, etc. may be used to describe various elements, but the constituent elements are not limited by such terms. These terms are used only to distinguish one component from another. It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

FIG. 1 is an exploded perspective view of a pipe clamp according to an embodiment of the present invention, FIG. 2 is an exploded perspective view illustrating a pipe clamp according to an embodiment of the present invention, FIG. 3 is a cross- And FIG. 4 is a cross-sectional view showing the cut-away portion of the "AA" line in FIG. 2. As shown in FIG.

1 to 4, the piping clamp 100 according to an embodiment of the present invention is configured such that when the hydrogen ion concentration (pH) is low, the indicator I is discharged from the indicator capsule 140 Through the structure, it is possible to inform the user of the crevice corrosion state of the pipe 200.

Here, the pipe 200 is a pipe (or tube) for transferring oil, gas, and the like to a long distance, and may be made of stainless steel or various series of alloys excellent in corrosion resistance and strength. The pipe 200 may be formed in a longitudinal direction with a pipe for transferring the fluid and may be fixed to the mounting area 20 such as a plate through a clamp 100.

The piping clamp 100 may include a body 120 for supporting the outer surface of the pipe 200 and an indicator capsule 140 for discharging the indicator I according to a change in hydrogen ion concentration (pH).

Specifically, the body 120 may be provided in the form of a hexahedron with a structure for fixing the pipe 200 to the installation area 20 or connecting a plurality of pipes 200 to each other, And an opening hole may be provided at both ends of the hole. In this case, the opening hole may be a through hole having a shape corresponding to the outer peripheral surface of the pipe 200, and the inner diameter of the opening hole may be designed to be equal to or larger than the outer diameter of the pipe 200.

The body 120 may include a first body 120a and a second body 120b that surround the piping 200. The first body 120a may be in the form of a box with the bottom opened to enclose the upper portion of the pipe 200 and the second body 120b may be in the form of a box with the top opened to enclose the lower portion of the pipe 200. [ have. The first body 120a and the second body 120b may be assembled with one body 120 by a fastening member 130 such as a bolt passing through the reinforcing plate in a state where the first body 120a and the second body 120b are vertically disposed.

The body 120 may be made of a non-metallic material in consideration of cost and weight. For example, in the present embodiment, the body 120 is made of a synthetic resin material such as polypopylene.

Particularly, the body 120 may be made of synthetic resin at least partially made of transparent material so that the user can recognize the indicator I discharged from the indicator capsule 140 from the outside. For example, the body 120 may be provided with a separate transparent window made of transparent synthetic resin, or one side or the whole of the body 120 may be made of transparent synthetic resin.

The body 120 may be provided with a plurality of partition walls 122 spaced apart in the longitudinal direction of the pipe 200. The plurality of partition walls 122 can support the outer surface of the pipe 200 in a balanced manner through the end portions and a seating groove portion 125 in which the indicator capsule 140 is mounted can be provided between the plurality of partition walls 122 have.

In this embodiment, the body 120 is provided with a partition wall 122 for supporting the pipe 200, but the present invention is not limited thereto. The body 120 may have a separate member (for example, And the pipe 200 can be supported with a member between them.

The indicator capsule 140 may be mounted in the interior of the body 120, for example, the seating groove 125 of the body 120, and the indicator capsule 140 may have an accommodation space Can be provided. Here, the indicator (I) may be a dye that provides a specific color for the user to recognize the corrosion state of the pipe 200.

The outer shell of the indicator capsule 140 may be composed of a pH-sensitive hydrated gel which selectively discharges the indicator I according to changes in the pH of the external hydrogen ion. The pH-sensitive hydrogel may be composed of a polymer membrane having a network structure in which the degree of swelling of the membrane changes with a change in pH.

Here, the polymer membrane maintains the degree of swelling low in order to prevent the indicator (I) in the indicator capsule (140) from being discharged to the outside in a high pH environment (normal temperature / normal pressure, pH 8.5 or more) The indicator I in the indicator capsule 140 may be discharged to the outside and recognized by the user because the indicator swells high at the normal pressure, pH 1.2 to pH 7.

For example, when local corrosion occurs on the surface of the pipe 200, corrosion of the metal can be accelerated due to depletion of oxygen and increase of Cl ions in interstitial spaces or interstitials or pitting between metals and other materials, Due to the byproducts, the hydrogen ion concentration inside the gap or fitting increases, so that the pH around the pipe 200 can be low (generally, the pH of the seawater is 7.5-8.4 neutral or weakly alkaline). Under a low pH environment, the indicator capsule 140 can drain the indicator I to the user and recognize the corrosive environment.

INDUSTRIAL APPLICABILITY As described above, in the present invention, when the hydrogen ion concentration around the piping is lowered due to the corrosive exposure of the piping, the indicator in the indicator capsule is discharged to the outside, so that the user can quickly notify the crevice corrosion state of the piping And the like.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each constituent element depending on the application field or can combine or substitute the embodiments in a form not clearly disclosed in the embodiments of the present invention, Of the range. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that such modified embodiments are included in the technical idea described in the claims of the present invention.

100: Clamp 120: Body
130: fastening member 140: indicator capsule
200: Piping

Claims

A body formed with a hole through which the piping passes, the body supporting the outer surface of the piping; And
An indicator capsule mounted inside the body and having an indicator filled therein,
Wherein the indicator capsule includes a shell for discharging the indicator according to an external pH change.

The method according to claim 1,
The shell of the indicator capsule
And a pH-sensitive hydrogel for discharging the indicator when the hydrogen ion concentration (pH) is low.

3. The method of claim 2,
The pH-sensitive hydrated gel
Wherein the polymer membrane is a polymer membrane that provides a mesh structure that swells when the hydrogen ion concentration (pH) is low.

The method according to claim 1,
The indicator
And a dye which provides a specific color to allow the user to recognize the corrosion state of the pipe.

The method according to claim 1,
The body
And a plurality of partition walls spaced in the longitudinal direction of the pipe to support the outer surface,
Between the plurality of partition walls
Wherein the mounting recessed portion to which the indicator capsule is mounted is provided.

The method according to claim 1,
The body
Wherein at least a part of said indicator is made of a transparent synthetic resin so that said indicator can be recognized from outside.