JP2006284511A - Holding material for piping - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a holding material that can determine water leakage from piping, at an early stage and moreover, readily from the appearance. <P>SOLUTION: The outer peripheral faces of the holding materials 1 and 2 are covered with a transparent sheet 4. A double-coated tape 5 is provided along the wrapping of the sheet 4, and further, a jointing tape 6 is stuck thereon. Preferably, the jointing tape 6 is transparent. In addition, a layer 7, including a discoloring substance by being brought into contact with moisture on the surface of the holding materials 1 and 2 being in contact with the inside face of the sheet 4, is formed. If there is a dew condensation or water leakage from a joint or the like, the layer 7, containing the discoloring substance by being brought into contact with the moisture is in contact with water, and only the part in contact with water is discolored. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a holding material attached to the outer periphery of a pipe for the purpose of heat insulation, heat insulation or sound insulation.

  As means for detecting water leakage from piping and water adhering to a packaging material, those disclosed in Patent Documents 1 to 4 are known.

  In Patent Document 1, temperature-sensitive color-changing liquid is applied to a water leak inspection part of a pipe, high-temperature air is fed into the pipe, and the presence or absence of water leakage is determined by changing the temperature-sensitive color-changing liquid. I try to detect it.

  Patent Document 2 discloses a technique for detecting a water leak by applying a paint containing a substance that changes color by reacting with water to a joint portion of a pipe.

  In Patent Document 3, as a tape for detecting water leakage, a pattern or the like is drawn with a water-soluble coloring material on the surface of the tape, and when the water leaks, a phenomenon such as collapse of the pattern occurs. Therefore, a technology that can detect a water leak at an early stage is disclosed.

In Patent Document 4, as a packaging material, characters such as “wet with water” are printed with a mixture containing a component that changes from colorless to colored when in contact with moisture. The content that the character becomes obvious is disclosed.
JP 56-49935 A JP-A-61-83265 JP-A-61-250535 Japanese Patent No. 2719843

  Since the method of Patent Document 1 uses a liquid that senses temperature rather than a liquid that changes color by reacting with water, a leak point cannot be detected unless high-temperature air is fed into the pipe. Moreover, it is impossible to continuously monitor water leakage or dew condensation during normal use of the piping.

  With the means disclosed in Patent Document 2, if the water leak location is held by the heat insulating material, the water leak cannot be found from the outside.

  With the means disclosed in Patent Document 3, as in Patent Document 2, if the water leak location is held by a heat insulating material, the water leak cannot be found from the outside.

  The packaging material disclosed in Patent Document 4 is effective when water is applied from the outside, but water leakage from piping dew condensation or piping seams cannot be detected effectively.

  In order to solve the above-mentioned problems, the present invention provides a transparent moisture-proof layer on the outer peripheral surface of the holding member attached to the outer periphery of the pipe for the purpose of heat insulation, heat insulation or sound insulation, and is in contact with the pipe of the holding member. On the inner peripheral surface, the outer peripheral surface in contact with the moisture-proof layer of the holding member, or the inside of the holding member, a layer containing a substance that changes color by contact with moisture was formed.

  The holding material is formed by molding glass wool or rock wool, for example. Further, a resin sheet and a resin tape can be considered as the transparent moisture-proof layer on the outer peripheral surface of the holding member, but the conventional aluminum foil sheet cannot be used because it cannot visually recognize the internal discoloration from the outside. That is, in the present invention, “transparent” needs to be transparent to the extent that internal discoloration can be recognized.

  In addition, a layer containing a substance that changes color when it comes into contact with moisture refers to an impregnated material impregnated with a substance that changes color when it comes into contact with liquid moisture, tape, sheet, cloth, or nonwoven fabric that comes into contact with moisture. In this case, a layer containing a substance that changes color can be considered.

  The layer containing a substance that changes color by contact with moisture is formed by impregnating the outer part, the inner part or the whole of the holding member, or the holding member on the outer or inner side surface of the holding member. It can be considered that it is attached as a separate body or formed on the inner surface of a transparent moisture-proof layer.

  According to the present invention, even when there is a small amount of water leakage or dew condensation from the pipe, it is possible to accurately identify the water leakage location at an early stage. In addition, since the appearance of water leakage and dew condensation can be recognized from the appearance, inspection is easy.

  In particular, when a layer containing a substance that changes color by contact with moisture is provided on the inner peripheral surface that is in contact with the piping of the holding material, it can be detected early when the water leakage point is close to the end surface of the holding material. Even if it is not close to the end face, if a substance that changes color dissolves in water, it will ooze out to the outside through the glass wool that constitutes the holding material, so that water leakage and condensation can be detected.

  In addition, when a layer containing a substance that changes color by contact with moisture is provided on the outer peripheral surface of the holding member that contacts the moisture-proof layer, the color change can be easily recognized.

  Further, when the holding material is made of glass wool or rock wool, the entire holding material can be impregnated with a substance that changes color by contacting moisture. Furthermore, the workability is improved by attaching a layer that changes color on the outer side or inner side of the holding material as a separate body from the holding material, or by forming a layer that changes color on the inner side of the transparent moisture-proof layer. Rise.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a perspective view showing an example of a usage mode of the holding material according to the present invention, and FIG. 2 is a cross-sectional view of the holding material according to the present invention. A holding member 1 for a direct distribution portion and a holding member 2 for an elbow portion are shown.

  Each of the holding members 1 and 2 is formed by glass wool or rock wool so as to hold the direct distribution part or the elbow part. In order to facilitate mounting on the pipe P, each of the holding members 1 and 2 is provided with a single cut-off portion 3 in the length direction, and when the pipe is mounted on the pipe P, the cut-off portion 3 is expanded. The holding members 1 and 2 are prevented from falling from the piping by the elastic force in the closing direction of the holding members 1 and 2 themselves.

  The outer peripheral surfaces of the holding members 1 and 2 are covered with a transparent sheet 4. A double-sided tape 5 is provided along the end of winding of the sheet 4, and a joint tape 6 is further attached thereon. Preferably, the joint tape 6 is also transparent.

  A layer 7 containing a substance that changes color by contact with moisture is formed on the surfaces of the holding members 1 and 2 that are in contact with the inner surface of the sheet 4. Examples of substances that change color by contact with moisture include inorganic compounds that change color by desorption of crystal water, such as cobalt chloride, and water-soluble dyes. In addition, the layer 7 can be formed by a method of applying a material that changes its color by contact with water into a natural resin or a synthetic resin, which has been converted into an ink.

  In the above, if there is water leakage from dew condensation or pipe joints, the layer 7 containing the substance that changes color by contact with moisture comes into contact with water, and as shown in FIG. Discolor.

  FIG. 4 is a view similar to FIG. 2 showing another embodiment. In this embodiment, a layer 7 containing a substance that changes color by contact with moisture is formed on the inner peripheral surface in direct contact with the pipe P. is doing.

Although not shown, a layer 7 containing a substance that changes color by contacting moisture may be formed on the surface of each fiber of glass wool or rock wool constituting the holding members 1 and 2. In this case, the entire holding members 1 and 2 change color.
Alternatively, if the glass wool or rock wool constituting the holding members 1 and 2 is formed in two layers, a layer 7 containing a substance that changes color by contacting moisture can be provided in the middle portion in the thickness direction.

  Further, a layer 7 is formed by impregnating a cloth or a non-woven fabric with a substance that changes color by contact with moisture, and this layer 7 is adhered to the outer surface or inner surface of the holding materials 1 and 2. Good.

  FIG. 5 is a view for explaining another embodiment. In this embodiment, the inner surface of the transparent sheet 4 wound around the outer peripheral surfaces of the holding members 1 and 2 is brought into contact with moisture in advance. A layer 7 containing a substance that changes color is formed.

  The holding material according to the present invention is suitable for water leakage inspection of piping for air conditioning such as buildings and apartments.

The perspective view which shows an example of the usage condition of the holding material which concerns on this invention Sectional drawing of the holding material which concerns on this invention The same figure as FIG. 1 showing the state of discoloration in contact with water Figure similar to FIG. 2 showing another embodiment The figure which shows another Example

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 2 ... Holding material, 3 ... Separation part, 4 ... Transparent sheet, 5 ... Double-sided tape, 6 ... Joint tape, 7 ... Layer containing the substance which changes in color by contact with moisture, P ... Piping.

Claims (4)

A holding material that is attached to the outer periphery of the pipe for the purpose of heat insulation, heat insulation or sound insulation, and a transparent moisture-proof layer is provided on the outer peripheral surface of the holding material, and the inner surface is in contact with the piping of the holding material. A pipe including a peripheral surface, an outer peripheral surface that comes into contact with a moisture-proof layer of the holding material, or a layer containing a substance that changes color when in contact with moisture. For holding material. The holding member for piping according to claim 1, wherein the layer containing a substance that changes color by contact with moisture is formed by impregnating the outer portion, the inner portion, or the entire holding member. A piping holding material characterized by that. The holding member for piping according to claim 1, wherein the layer containing a substance that changes color by contact with moisture is attached to the outer side surface or the inner side surface of the holding member as a separate body from the holding member. A piping holding material, characterized by The piping holding member according to claim 1, wherein the layer containing a substance that changes color by contact with moisture is formed on an inner surface of a transparent moisture-proof layer. Wood.