JPH02132194U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the overall configuration of an embodiment of the anti-freeze piping material according to the present invention, Fig. 2 is a sectional view of the freeze detection tool of the anti-freeze piping material shown in Fig. 1, and Fig. 3 is the second Figure 4 is a circuit diagram of the freeze prevention piping material shown in Figure 1, and Figure 5 is the freeze prevention piping material according to the present invention. A perspective view of the overall configuration showing another example of the
FIG. 6 is a perspective view of the entire structure showing an embodiment of a pipe joint for freezing detection, FIG. 7 is a perspective view of the overall structure showing an embodiment of a freeze detection tool for pipe materials, and FIG. 8 is a sectional view of a conventional pipe material. FIG. 9 is a perspective view of the overall configuration of a conventional heat insulating material. 1, 20... Freeze prevention piping material, 2... Piping material, 3... Outer covering piping material, 4... Heating element, 5... Freeze detection tool, 6, 7, 33, 35, 54... Conductive layer,
8... Spacer, 9... Space, 21... Space ring, 30... Piping joint for freezing detection, 31...
Outer tube, 34...Spacer, 36, 55...Space, 50...Freeze detector for piping material, 52...Lid member, 57...Liquid.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a piping material for liquid transportation, which is composed of a piping material that carries a liquid inside and a jacket piping material that covers the outer periphery of the piping material, the piping material and the jacket piping A superheating body is disposed between the piping material and a freeze detection device is disposed inside the piping material to detect when the liquid is connected, and the freeze detection device detects freezing of the internal liquid. A piping material for preventing freezing, characterized in that the heating element is energized only while the heating element is being heated. (2) The antifreeze piping material according to claim 1, wherein the heating element is a planar heating element formed by covering the periphery of a self-regulating resistance heating element with an insulator. (3) The freezing device according to claim 1 or 2, wherein the self-controlling resistance heating element is made of carbon black and thermoplastic resin, and is configured to have a terminal plug attached to one end so that it can be connected to an external power source. Prevention piping material. (4) The above-mentioned freeze detection device has a spacer interposed at a constant interval between two conductive layers formed in a cylindrical shape in the direction of the pipe inside the above-mentioned piping material so that there is no contact when the pressure is constant. The antifreeze piping material according to claim 1, 2 or 3, wherein the piping material is arranged to form a space gap. (5) A cylindrical piping material and two cylindrical conductive layers are provided inside the piping material, and a spacer is interposed between the two conductive layers to form a space gap. and sealing the ends of the conductive layer,
A freeze detection piping joint that detects freezing of a liquid when conductive layers at locations where the spacer is not interposed are crushed by volume expansion due to solidification of the liquid running inside the piping material and are electrically connected. (6) a first conductive layer formed in a cylindrical shape;
A second conductive layer is provided by interposing spacers at regular intervals in the conductive layer to form a space gap, and a liquid is sealed inside the second conductive layer to form two conductive layers. The entire periphery including the piping material is covered with an outer covering, and when the conductive layers in the area where the spacer is not interposed are crushed by the volume expansion due to solidification of the liquid running inside the piping material and conduction is established. Freeze detection tool for piping materials that detects freezing of the liquid.