WO2023219176A1 - 発熱要素と熱電対とを有する被覆体 - Google Patents

発熱要素と熱電対とを有する被覆体 Download PDF

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Publication number
WO2023219176A1
WO2023219176A1 PCT/JP2023/018153 JP2023018153W WO2023219176A1 WO 2023219176 A1 WO2023219176 A1 WO 2023219176A1 JP 2023018153 W JP2023018153 W JP 2023018153W WO 2023219176 A1 WO2023219176 A1 WO 2023219176A1
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WO
WIPO (PCT)
Prior art keywords
thermocouple
sheet
sheet patch
patch
covering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/018153
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
章 佐々木
大作 石
研二 飯田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nichias Corp
Original Assignee
Nichias Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nichias Corp filed Critical Nichias Corp
Priority to CN202380038871.XA priority Critical patent/CN119156500A/zh
Priority to KR1020247037556A priority patent/KR20250003785A/ko
Priority to US18/864,971 priority patent/US20250311057A1/en
Publication of WO2023219176A1 publication Critical patent/WO2023219176A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • F16L53/30—Heating of pipes or pipe systems
    • F16L53/35—Ohmic-resistance heating
    • F16L53/38—Ohmic-resistance heating using elongate electric heating elements, e.g. wires or ribbons
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional [2D] plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional [2D] plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/027—Bands, cords, strips or the like for helically winding around a cylindrical object
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/147—Arrangements for the insulation of pipes or pipe systems the insulation being located inwardly of the outer surface of the pipe

Definitions

  • the present invention relates to a covering having a heat generating element and a thermocouple.
  • a covering that can heat and insulate piping for gas supply or exhaust to a desired temperature, for example.
  • Patent Document 1 discloses the following structure as a covering that can heat piping for gas supply or exhaust to a desired temperature and keep it warm.
  • the covering body of Patent No. 6616265 has an inner layer portion 510 and an outer layer portion 500 (both A heating element 530 such as a heater wire, a heat insulating member 540 (glass cloth material) that supports the heating element 530 on the inner layer side, and a heat insulating member disposed on the outer layer side of the heating element 530.
  • a heating element 530 such as a heater wire
  • a heat insulating member 540 glass cloth material
  • 520 glass fiber
  • a thin metal plate 400 is further interposed between the heat insulating member 540 and the inner layer portion 510, and a heat insulating member with a large degree of heat storage is provided further inside the inner layer portion 510 (on the gas pipe 110 side).
  • 600 alumina cloth material
  • the thin metal plate 400 and the heat insulating member 600 are arranged to uniformly heat the gas pipe.
  • a temperature sensing section 555 such as a plate-shaped heat collecting plate is provided so as to come into contact with the gas pipe 110.
  • the temperature detection unit 555 is attached further inside the heat insulation member 600 (on the gas pipe 110 side).
  • a thermocouple (not shown in FIG. 21) is connected to the temperature detection section 555.
  • a thermoswitch 560 as a temperature switch (control unit) is also attached further inside the heat-insulating member 600 (on the gas pipe 110 side).
  • the heat of the gas pipe 110 is easily transmitted directly to the temperature detection part 555 such as a plate-shaped heat collecting plate, so that the thermocouple connected to this
  • the temperature of the gas pipe 110 can be detected. Therefore, information on the temperature detected by the thermocouple can be used for feedback control of the heating element 530.
  • thermocouples When measuring the temperature of piping with a thermocouple, the inventor of the present invention proposed a plate-shaped heat collecting plate (auxiliary to the thermocouple in order for the thermocouple to more effectively detect the surrounding heat) as described above.
  • Thermocouples can be connected to thermocouples without an attached metal plate or foil with high thermal conductivity (e.g., stainless steel, aluminum, or other metals with thermal conductivity equal to or higher than that of the thermocouple).
  • directly on the piping surface if the piping body is coated with a resin or the like, the resin surface is the piping surface) (in addition to direct contact, It has been found that temperature measurement can be carried out with higher accuracy if the method does not exclude the presence of a film, patch, etc. between the two, which has a small effect on the measurement.
  • thermocouple is simply exposed inside the heat insulating member 600, the contact state between the thermocouple and the piping surface may not be stable, and highly accurate temperature measurement may not be possible. I also found out.
  • the heat insulating member 600 was provided so as to uniformly cover the entire pipe in order to improve temperature uniformity. It was found that even if it did, it would not have a significant effect on the temperature uniformity of the entire pipe.
  • An object of the present invention is to provide a covering body that has a heat generating element and a thermocouple, and is capable of realizing highly accurate temperature measurement by bringing the thermocouple into stable direct contact with the surface of an object. It is to be.
  • the present invention provides a covering for covering an object, which includes an inner layer part disposed close to the object, an outer layer part disposed far from the object, and the outer layer part of the inner layer part.
  • an inner heat insulating member disposed on the inner layer side of the outer layer portion, an outer heat insulating member disposed on the inner layer side of the outer layer portion, and an inner heat insulating member disposed between the inner heat insulating member and the outer heat insulating member. It is characterized by comprising a heat generating element, a sheet providing a stepped portion on a side of the inner layer portion closer to the object, and a thermocouple provided on a side of the stepped portion closer to the object. It is a covering body.
  • thermocouple by providing the stepped portion (a portion that locally swells inward with respect to its peripheral area), the thermocouple can be stably and directly applied to the surface of the object. will be supported. Thereby, more accurate temperature measurement can be achieved.
  • thermocouple is not exposed; that is, the object side of the thermocouple is covered with, for example, a thin film or patch (e.g., fluororesin, polyimide resin, or aramid resin, etc.).
  • a thin film or patch e.g., fluororesin, polyimide resin, or aramid resin, etc.
  • the upper limit of the thickness is about 0.5 mm), and a mode in which such films, patches, etc. are interposed between the thermocouple and the object is not excluded.
  • the sheet is locally provided as a sheet patch on a side of the inner layer portion closer to the object to provide the stepped portion.
  • the locally applied sheet patch supports direct and stable application of the thermocouple to the object surface. Thereby, more accurate temperature measurement can be achieved.
  • the sheet patch is preferably made of an elastic material that allows the thermocouple to be softly pressed against the surface of the object.
  • the sheet patch is preferably made of fluororesin, polyimide resin, or aramid resin. It was confirmed that even if such sheet patches were provided locally, there was no significant effect on the temperature uniformity of the entire object. Furthermore, in the case of such a sheet patch, since it has heat insulating properties and has a low heat accumulation property, it also has the advantage that direct influence from heat generating elements can be effectively eliminated in temperature measurement using thermocouples.
  • the area of the sheet patch (projected area from the inside) should be 5 to 400 times the exposed area of the thermocouple (projected area from the inside). preferable. Within this range, the thermocouple can be stably brought into direct contact with the surface of the object without significantly affecting the temperature uniformity of the entire object.
  • the effect of the present invention can be obtained if the area where the thermocouple is exposed is 1/400 to 1/87 times that area ( The area of the sheet patch is 87 to 400 times the area of the thermocouple exposed on the sheet patch). Furthermore, it was confirmed that when the area of the sheet patch is 3 cm x 2 cm, the effect of the present invention can be obtained if the area where the thermocouple is exposed is 1/24 to 1/5 times that area (the area of the sheet patch is 3 cm x 2 cm). (5 to 24 times the area of the thermocouple exposed on the sheet patch).
  • the sheet patch has a thickness of 0.1 mm to 5.0 mm.
  • the sheet patch has a rectangular shape in which one side is 1/2 or less of the outer circumference of the pipe, or has a rectangular shape in which one side is 10 cm or less.
  • the sheet patch has a circular or annular shape with a diameter of 1/2 or less of the outer circumference of the pipe, or a circular or annular shape with a diameter of 10 cm or less.
  • the technical idea of providing a sheet patch locally can be replaced by locally protruding a sheet patch portion that is a part of a sheet that extends as a whole with respect to the object. That is, in another aspect of the present invention, the stepped portion is provided by partially protruding the sheet as a sheet patch portion toward a side closer to the object.
  • the locally provided sheet patch portions support direct and stable application of the thermocouple to the surface of the object. Thereby, more accurate temperature measurement can be achieved.
  • the sheet patch portion (including the sheet) is made of an elastic material that allows the thermocouple to be softly pressed against the surface of the object.
  • the sheet including the sheet patch portion is preferably made of fluororesin, polyimide resin, or aramid resin. It was confirmed that even if such a sheet patch portion (a sheet including the sheet) is provided, there is no significant effect on the temperature uniformity of the entire object. Furthermore, in the case of such a sheet patch part , since it has heat insulation properties and has a small heat accumulation property, it also has the advantage that direct influence from heat generating elements can be effectively eliminated in temperature measurement using a thermocouple.
  • the area of the sheet patch portion (projected area from the inside) is 5 to 400 times the exposed area of the thermocouple (projected area from the inside) when the thermocouple is exposed on the sheet patch portion. It is preferable. Within this range, the thermocouple can be stably brought into direct contact with the surface of the object without significantly affecting the temperature uniformity of the entire object.
  • the effect of the present invention can be obtained if the area where the thermocouple is exposed is 1/400 to 1/87 times that area. (The area of the sheet patch portion is 87 to 400 times the area where the thermocouple is exposed on the sheet patch portion). Furthermore, it was confirmed that when the area of the sheet patch part is 3 cm x 2 cm, the effect of the present invention can be obtained if the area where the thermocouple is exposed is 1/24 to 1/5 times that area (sheet patch part). (The area of the thermocouple is 5 to 24 times the area where the thermocouple is exposed on the sheet patch).
  • the sheet excluding the sheet patch portion has a thickness of 0.1 mm to 5.0 mm.
  • the sheet patch portion has a thickness of 0.1 mm to 5.0 mm on the sheet.
  • the sheet patch portion has a rectangular shape with one side of 1/2 or less of the outer circumference of the pipe, or a rectangular shape with one side of 10 cm or less.
  • the sheet patch portion has a circular or annular shape with a diameter of 1/2 or less of the outer circumference of the pipe, or a circular or annular shape with a diameter of 10 cm or less.
  • the heat generating element and the thermocouple are arranged so as not to overlap when viewed in the thickness direction from the inner layer portion to the outer layer portion.
  • thermocouple direct influence from the heat generating element can be eliminated even more effectively in temperature measurement using a thermocouple.
  • the present invention is a heat generating structure characterized by comprising an object that is a straight pipe, an elbow pipe, a flexible pipe, or a valve box, and a covering body having any of the above characteristics.
  • the stepped portion by providing the stepped portion, it is supported to stably and directly apply the thermocouple to the surface of the object. Thereby, more accurate temperature measurement can be achieved.
  • locally applied sheet patches assist in stably and directly applying the thermocouple to the object surface. Thereby, more accurate temperature measurement can be achieved.
  • the sheet patch portion locally protruding on the sheet supports direct and stable application of the thermocouple to the surface of the object. Thereby, more accurate temperature measurement can be achieved.
  • FIG. 1 is a schematic perspective view of a covering according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of the covering of FIG. 1; This is a photo of another type of thermocouple. This is a photo of another type of thermocouple. This is a photo of another type of thermocouple.
  • FIG. 2 is a perspective view showing a specific example of a valve box. It is a front view showing a specific example of a valve box.
  • FIG. 2 is a schematic vertical cross-sectional view showing an example of a sheet patch having an uneven thickness.
  • FIG. 3 is a schematic vertical cross-sectional view showing another example of a sheet patch having an uneven thickness.
  • FIG. 1 is a schematic perspective view of a covering according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of the covering of FIG. 1; This is a photo of another type of thermocouple. This is a photo of another type of thermocouple.
  • FIG. 2
  • FIG. 3 is a schematic vertical cross-sectional view showing another example of a sheet patch having an uneven thickness.
  • FIG. 3 is a schematic vertical cross-sectional view showing another example of a sheet patch having an uneven thickness.
  • FIG. 3 is a schematic vertical cross-sectional view showing another example of a sheet patch having an uneven thickness.
  • FIG. 3 is a schematic vertical cross-sectional view showing another example of a sheet patch having an uneven thickness.
  • FIG. 7 is a schematic perspective view of a covering according to another embodiment of the present invention.
  • FIG. 15 is a schematic cross-sectional view of the covering of FIG. 14;
  • FIG. 16 is a schematic cross-sectional view corresponding to FIG. 15 and showing another example of the sheet patch portion.
  • FIG. 16 is a schematic cross-sectional view corresponding to FIG.
  • FIG. 16 is a schematic cross-sectional view corresponding to FIG. 15 and showing another example of the sheet patch portion.
  • FIG. 16 is a schematic cross-sectional view corresponding to FIG. 15 and showing another example of the sheet patch portion.
  • FIG. 16 is a schematic cross-sectional view corresponding to FIG. 15 and showing another example of the sheet patch portion.
  • FIG. 16 is a schematic cross-sectional view corresponding to FIG. 15 and showing another example of the sheet patch portion.
  • FIG. 2 is a schematic cross-sectional view of a conventional covering.
  • a covering 1 according to an embodiment of the present invention is a covering that can heat a straight pipe (an example of an object) for supplying or exhausting gas to a desired temperature and keep it warm.
  • the form of the covering 1 (on the inner layer side) is designed and manufactured in advance in accordance with the straight pipe-like external appearance of the pipe.
  • the covering 1 of this embodiment includes an inner layer portion 11 made of two laminated glass cloths, fluororesin-coated glass cloths, porous fluororesin sheets, or aramid fiber cloth layers. , an outer layer portion 12 made of a fluororesin coated glass cloth, a silicone resin coated glass cloth, a fluororesin porous sheet, or an aramid fiber cloth layer.
  • the inner layer portion 11 is arranged on the side closer to the piping, and the outer layer portion 12 is arranged on the side farther from the piping.
  • the covering body 1 has a predetermined thickness (about 20 mm in this example), and the inner layer portion 11 and the outer layer portion 12 are connected by a side layer portion 13 at the side end.
  • the side layer portion 13 is also made of a fluororesin-coated glass cloth layer.
  • an inner layer heat insulating member 21 is arranged outside the inner layer portion 11 (on the outer layer portion 12 side).
  • the inner layer side heat insulating member 21 supports a heat generating element 23 made of a heater wire on the inner layer side.
  • An outer layer heat insulating member 22 is arranged outside the heat generating element 23 (on the outer layer portion 12 side).
  • the inner heat insulating member 21 is made of silica fiber cloth
  • the heating element 23 is made of nickel chromium heating wire, and is sewn to the inner heat insulating member 21 with a fluororesin coated glass yarn
  • the outer heat insulating member 22 is made of Consists of glass mat.
  • sheet patches 31 are locally provided at two locations on the inside (piping side) of the inner layer portion 11 as sheets that provide stepped portions (through threads).
  • the sheet patch 31 may be sewn or glued, and the sheet patch 31 may be provided in one place or in three or more places.
  • Each of the sheet patches 31 of this embodiment is made of fluororesin, has appropriate elasticity, has a rectangular shape of 3 cm x 2 cm (area is 6 cm 2 ), and has a thickness of 1.0 mm. It is.
  • thermocouple 32 is exposed further inside (on the piping side) of each sheet patch 31.
  • the thermocouple 32 of this embodiment is a "sheath straight" type with a diameter of 1 mm, and the entire 2.0 cm length is exposed.
  • the thermocouple 32 is sewn or bonded to the sheet patch 31 via a thread.
  • the exposed area of the thermocouple 32 on the sheet patch 31 is 0.25 cm 2 .
  • the area of the sheet patch 31 is 24 times the area where the thermocouple 32 is exposed on the sheet patch 31 (projected area from the inside).
  • thermocouple 32 The base end side of the thermocouple 32 is connected via a lead wire (not shown) that penetrates the covering body 1 (sheet patch 31, inner layer part 11, inner layer heat insulating member 21, outer heat insulating member 22, and outer layer part 12). It can be connected to a control unit (for example, a thermostat) not shown.
  • the control section can also be connected to the heat generating element 23 by a lead wire passing through the outer layer section 12 and the outer layer side heat insulating member 22. Then, the control unit controls energization of the heat generating element 23 according to the temperature value measured by the thermocouple 32.
  • the covering 1 of this embodiment is provided with a fastening part 14 on the outer surface of the outer layer part 12, and the fastener of the fastener part 14 and the fastener of the outer layer part 12 are connected to a hook, a belt, etc.
  • the covering 1 is fixed onto the target pipe by fastening with a hook-and-loop fastener, a string, or a fluororubber ring.
  • the form (on the inner layer side) of the covering 1 is designed and manufactured in advance in accordance with the external form of the piping that is the object. Then, the covering 1 is fixed onto the pipe, which is the object, by fastening the fasteners of the fastening portion 14 and the fasteners of the outer layer portion 12.
  • thermocouple 32 is exposed on the piping side in the covering 1 of this embodiment, but the sheet patch 31 has elasticity that softly presses the thermocouple 32 against the piping surface. Therefore, the thermocouple 32 can be stably brought into direct contact with the piping surface.
  • the sheet patch 31 is provided only locally corresponding to the installation position of the thermocouple 32, it has been confirmed that it does not have a large adverse effect on the temperature uniformity of the entire piping.
  • the locally provided sheet patches 31 support direct and stable contact of the thermocouples 32 with the piping surface. Thereby, more accurate temperature measurement can be achieved.
  • thermocouple 32 is connected to a control unit (for example, a thermostat) not shown, and the control unit controls energization to the heat generating element 23 according to the temperature value measured by the thermocouple 32. Thereby, the power supply to the heat generating element 23 can be controlled with higher precision.
  • a control unit for example, a thermostat
  • the sheet patch 31 has heat insulating properties and has a small heat storage property, the direct influence from the heat generating element 23 can be effectively suppressed in temperature measurement by the thermocouple 32. It also has the advantage of being able to be eliminated. Furthermore, if the heat generating element 23 and the exposed portion of the thermocouple 32 are arranged so as not to overlap when viewed in the thickness direction from the inner layer part 11 to the outer layer part 12, the direct influence from the heat generating element 23 can be avoided. It is more effective in eliminating
  • the sheet patch 31 has a rectangular shape of 3 cm x 2 cm, and the area of the sheet patch 31 is 24 times the area where the thermocouple 32 is exposed on the sheet patch 31. , but not limited to. According to the inventor, if the area of the sheet patch is 3 cm x 2 cm, and the area where the thermocouple is exposed is 1/24 to 1/5 times that area (the area of the sheet patch is 3 cm x 2 cm) It was confirmed that the effect of the present invention could be obtained (5 to 24 times the area where the pair is exposed).
  • the sheet patch 31 has a rectangular shape of 10 cm x 10 cm, according to the present inventor, if the area where the thermocouple is exposed is 1/400 to 1/87 times that area (the area of the sheet patch is It was confirmed that the effect of the present invention can be obtained by 87 to 400 times the area of the thermocouple exposed on the patch.
  • the sheet patch 31 may have a rectangular shape of another size, for example, the effect of the present invention can be obtained if the sheet patch 31 is a rectangular shape with one side of 10 cm or less. In relation to the outer circumference of the pipe, the effect of the present invention can be obtained if the sheet patch 31 has a rectangular shape in which one side is 1/2 or less (preferably 1/4 or less) of the pipe outer circumference.
  • the thermocouple 32 can be pressed softly against the piping surface, and the thermocouple 32 can be stably brought into direct contact with the piping surface.
  • the sheet patch 31 is not limited to a rectangular shape and can have various shapes.
  • the sheet patch 31 may have a circular shape, an elliptical shape, or a ring shape.
  • the region of the central hole may overlap the thermocouple 32.
  • the sheet patch 31 has a circular shape, an elliptical shape, or an annular shape, the effects of the present invention can be expected as long as the diameter, twice the major axis radius, or the outer diameter is 10 cm or less.
  • the sheet patch 31 has a diameter that is twice the major axis radius, or an outer diameter of 1/2 or less (preferably 1/4 or less) of the pipe outer circumference.
  • the effects of the invention can be obtained (the thermocouple 32 can be pressed softly against the piping surface, and the thermocouple 32 can be stably brought into direct contact with the piping surface).
  • the effects of the present invention can be expected as long as the thickness of the sheet patch 31 is between 0.1 mm and 5.0 mm. (If the thickness of the sheet patch 31 exceeds 5.0 mm, the distance between the heating element 32 and the piping surface at the relevant location will become excessive, and furthermore, the end face portion of the sheet patch 31 will become excessively stepped, causing the covering to 1 and the piping surface, which may impede efficient and even heating of the piping.)
  • thermocouple (Modified example of thermocouple) Additionally, the present invention is not limited to "sheath straight" type thermocouples 32, but may utilize various other types of thermocouples.
  • Figure 3 is a photograph of a thermocouple of the type "with tip plate”
  • Figure 4 is a photograph of a thermocouple of type "with tip block”
  • Figure 5 is a photograph of a thermocouple of type "with tip O-shaped terminal”. This is a photograph of a thermocouple of It can be applied to
  • the overall form of the covering 1 is designed and manufactured for a straight pipe, but the present invention is not limited to this, and for a pipe having a straight pipe part and a bent part.
  • the overall form of the covering 1 may be designed and manufactured.
  • the overall shape of the covering 1 may be designed and manufactured for an object having a complicated shape, such as a valve box (a box housing a valve unit).
  • 6 and 7 show specific structural examples of the valve box 40 (FIGS. 6 and 7 are based on FIGS. 10 and 11 of the prior patent (Patent No. 6596025) by the applicant).
  • the entire heat generating structure including a target object (for example, a straight pipe, an elbow pipe, a flexible pipe, or a valve box) and a covering 1 that covers the target object is also covered by the present invention.
  • a target object for example, a straight pipe, an elbow pipe, a flexible pipe, or a valve box
  • a covering 1 that covers the target object is also covered by the present invention.
  • the thickness of the sheet patch 31 If the thickness of the sheet patch 31 is increased, the effect of pressing the thermocouple 32 against it will be increased, but if it is made too thick, the heating of the sheet patch 31 may become insufficient and temperature unevenness may occur. Therefore, it is desirable that the thickness of the sheet patch 31 be appropriately selected depending on the type and size of the object and the covering 1, the type and size of the thermocouple 32, and the like.
  • the thickness of the sheet patch 31 is constant or approximately constant throughout the sheet patch 31.
  • the invention is not limited to such embodiments.
  • the tip side of the thermocouple 32 can be pressed against the object.
  • the application effect can be made more reliable.
  • the influence of thermal noise that directly reaches the thermocouple 32 from the heat generating element 23 made of a heater wire is suppressed.
  • FIGS. 8 to 13 are schematic vertical cross-sectional views showing examples of sheet patches 31 having varying thicknesses.
  • FIG. 8 is a schematic vertical cross-sectional view showing an example of a type in which the region of the sheet patch 31 located on the tip side of the thermocouple 32 (on the right side in FIG. 8) is bent.
  • 8(a) shows the state before being attached to the covering body 1
  • FIG. 8(b) shows the state after being attached to the covering body 1.
  • the upper surface side of the sheet patch 31 is bonded to the cover 1, but the cover 1 is not shown.
  • the number of times of folding is preferably 2 or less (overlapping 3 or less) (because it is not easy to fold 3 or more times).
  • thermocouple 32 by bending the region of the sheet patch 31 located on the tip side of the thermocouple 32 toward the opposite side of the thermocouple 32, the thermocouple 32 can be prevented from undesirably "catching" with the sheet patch 31. The risk of undesired deformation or breakage occurring is significantly suppressed.
  • FIG. 9 is a schematic vertical cross-sectional view showing an example of a type in which the region of the sheet patch 31 located on the tip end side of the thermocouple 32 (on the right side in FIG. 9) is overlapped.
  • 9(a) shows the state before being attached to the covering body 1
  • FIG. 9(b) shows the state after being attached to the covering body 1.
  • the upper surface side of the sheet patch 31 is bonded to the cover 1, but the cover 1 is not shown.
  • the number of sheets to be stacked is preferably three or less from the viewpoint of ease of manufacture (because it is not easy to stack four or more sheets).
  • thermocouple 32 can be prevented from undesirably "catching" with the sheet patch 31. ”, etc., resulting in undesirable deformation or damage.
  • FIG. 10 shows that the region of the sheet patch 31 located on the tip side of the thermocouple 32 (on the right side in FIG. 10) is thicker than the region of the sheet patch 31 located on the root side of the thermocouple 32 (on the left side in FIG. 10).
  • This is a schematic vertical cross-sectional view showing an example of a type in which the entire sheet patch 31 is formed in a "wedge shape".
  • a thermocouple 32 is provided on the inclined surface side of the wedge-shaped sheet patch 31.
  • thermocouple 32 may be undesirably "caught” with the sheet patch 31, resulting in undesired deformation or damage. is significantly suppressed.
  • FIG. 11 also shows that the region of the sheet patch 31 located on the tip side of the thermocouple 32 (on the right side in FIG. 11) is thicker than the region of the sheet patch 31 located on the root side of the thermocouple 32 (on the left side in FIG. 11).
  • This is a schematic vertical cross-sectional view showing an example of a type in which the entire sheet patch 31 is formed in a "wedge shape".
  • FIG. 11A shows the state before attachment to the covering 1, in which the thermocouple 32 is provided on the horizontal surface side of the wedge-shaped sheet patch 31.
  • FIG. 11(b) shows the state after attachment to the covering 1, in which the upper surface side of the sheet patch 31 is adhered to the covering 1, but illustration of the covering 1 is omitted.
  • thermocouple 32 may be undesirably "caught" with the sheet patch 31 and cause undesired deformation or damage is significantly suppressed.
  • FIG. 12 shows that the region of the sheet patch 31 located on the tip side of the thermocouple 32 (on the right side in FIG. 10) is thicker than the region of the sheet patch 31 located on the root side of the thermocouple 32 (on the left side in FIG. 11).
  • This is a schematic vertical cross-sectional view showing an example of a type in which a part of the sheet patch 31 is formed into a "wedge shape".
  • a thermocouple 32 is provided on the inclined surface side of the sheet patch 31.
  • thermocouple 32 may undesirably "catch" with the sheet patch 31, resulting in undesired deformation or damage. The risk is significantly suppressed.
  • FIG. 13 also shows that the region of the sheet patch 31 located on the tip side of the thermocouple 32 (on the right side in FIG. 13) is thicker than the region of the sheet patch 31 located on the root side of the thermocouple 32 (on the left side in FIG. 13).
  • This is a schematic vertical cross-sectional view showing an example of a type in which a part of the sheet patch 31 is formed into a "wedge shape".
  • FIG. 13A shows the state before attachment to the covering 1, in which the thermocouple 32 is provided on the horizontal surface side of the sheet patch 31.
  • FIG. 13(b) shows the state after attachment to the covering 1, in which the upper surface side of the sheet patch 31 is adhered to the covering 1, but illustration of the covering 1 is omitted.
  • thermocouple 32 may be undesirably "caught" with the sheet patch 31 and cause undesired deformation or damage is significantly suppressed.
  • the sheet patch 31 is provided directly inside the inner layer portion 11 (on the piping side), but even if some intermediate layer is interposed between the two, the scope of the present invention does not fall within the scope of the present invention. This is the internal configuration.
  • a sheet 130 from which the sheet patch portion 131 locally protrudes is arranged inside the inner layer portion 11 (on the piping side). Good too.
  • Such an embodiment is shown in FIGS. 14 and 15.
  • a sheet 130 has sheet patch portions 131 protruding locally at two locations (one location or three or more locations may be used) inside the inner layer portion 11 (on the piping side). is located.
  • the sheet patch portion 131 is configured as a thicker portion than other portions of the sheet 130 to provide a stepped portion (see FIG. 15).
  • the sheet 130 (including the sheet patch portion 131) of this embodiment is made of fluororesin and has appropriate elasticity.
  • the thickness of the sheet 130 excluding the sheet patch portion 131 is 0.5 mm, and each sheet patch portion 131 has a rectangular shape of 3 cm x 2 cm (area is 6 cm 2 ) and has a thickness of 1.0 mm. (0.5 mm thicker than the rest of the sheet 130).
  • thermocouple 32 is also exposed on the piping side, but the sheet patch portion 131 has elasticity that allows the thermocouple 32 to be softly pressed against the piping surface. Therefore, the thermocouple 32 can be stably brought into direct contact with the piping surface.
  • the embodiment shown in FIGS. 14 and 15 also supports stably and directly contacting the thermocouple 32 with the piping surface by the locally provided sheet patch portion 131. Thereby, more accurate temperature measurement can be achieved.
  • thermocouple 32 is connected to a control unit (for example, a thermostat) not shown, and the control unit controls energization to the heat generating element 23 according to the temperature value measured by the thermocouple 32. Thereby, the power supply to the heat generating element 23 can be controlled with higher precision.
  • a control unit for example, a thermostat
  • the sheet patch portion 131 has heat insulating properties and has a small heat storage property, so that direct influence from the heat generating element 23 can be effectively eliminated in temperature measurement using the thermocouple 32. . Furthermore, if the heat generating element 23 and the exposed portion of the thermocouple 32 are arranged so as not to overlap when viewed in the thickness direction from the inner layer part 11 to the outer layer part 12, the direct influence from the heat generating element 23 can be avoided. It is more effective in eliminating
  • the sheet patch section 131 has a rectangular shape of 3 cm x 2 cm, and the area of the sheet patch section 131 is larger than the area where the thermocouple 32 is exposed on the sheet patch section 131. , 24 times, but is not limited to this. According to the inventor of the present invention, when the area of the sheet patch part is 3 cm x 2 cm, if the area where the thermocouple is exposed is 1/24 to 1/5 times that area (the area of the sheet patch part is 3 cm x 2 cm). It was confirmed that the effect of the present invention can be obtained (5 to 24 times the area where the thermocouple is exposed).
  • the inventor of the present invention states that if the area where the thermocouple is exposed is 1/400 to 1/87 times that amount (the area of the sheet patch portion is , 87 to 400 times the area where the thermocouple is exposed on the sheet patch portion), it was confirmed that the effect of the present invention can be obtained.
  • the sheet patch portion 131 may have a rectangular shape of another size, for example, the effect of the present invention can be obtained if the sheet patch portion 131 is a rectangular shape with one side of 10 cm or less. In terms of the relationship with the outer circumference of the pipe, the effect of the present invention can be obtained if the sheet patch portion 131 has a rectangular shape in which one side is 1/2 or less (preferably 1/4 or less) of the pipe outer circumference.
  • the thermocouple 32 can be pressed softly against the surface, and the thermocouple 32 can be stably brought into direct contact with the piping surface).
  • the sheet patch portion 131 is not limited to a rectangular shape and can have various shapes.
  • the sheet patch portion 131 may have a circular shape, an elliptical shape, or a ring shape.
  • the region of the central hole may overlap the thermocouple 32.
  • the sheet patch portion 131 has a circular shape, an elliptical shape, or an annular shape
  • the effects of the present invention can be expected as long as the diameter, twice the major axis radius, or the outer diameter is 10 cm or less.
  • the seat patch portion 131 has a diameter that is twice the major axis radius, or an outer diameter of 1/2 or less (preferably 1/4 or less) of the pipe outer circumference.
  • the effects of the present invention can be obtained (the thermocouple 32 can be pressed softly against the piping surface, and the thermocouple 32 can be stably brought into direct contact with the piping surface).
  • the effects of the present invention can be expected as long as the thickness of the sheet patch portion 131 is between 0.1 mm and 5.0 mm. (If the thickness of the sheet patch portion 131 exceeds 5.0 mm, the distance between the heating element 32 and the piping surface at the relevant location will be excessive, and furthermore, the end surface portion of the sheet patch portion 131 will have an excessive step. Since a gap remains between the covering 1 and the surface of the pipe, it may be difficult to heat the pipe efficiently and evenly.)
  • peripheral edge portion thereof is gently sloped, like the seat patch portion 131' shown in FIG. 16.
  • a bulking element (step forming element) 211 is interposed on the inner side (piping side) of the inner layer part 11, and the thickness of the sheet patch part 231 as a whole is
  • the stepped portion may be provided by disposing a sheet 130 that is constant or substantially constant.
  • an increased part (step forming part) 11' is provided in advance on the inner side (piping side) of the inner layer part 11, and the thickness of the part itself is
  • the stepped portion may be provided by arranging the sheet 130 that is constant or substantially constant throughout.
  • a stepped portion may be provided by processing a portion of the sheet 130 into a shape that protrudes inward (towards the piping) using some type of embossing technique or the like. Good too.
  • a stepped section may be provided by arranging a part of the sheet 130 so as to be folded into an S-shaped cross section.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Surface Heating Bodies (AREA)
  • Pipe Accessories (AREA)
  • Thermal Insulation (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
PCT/JP2023/018153 2022-05-13 2023-05-15 発熱要素と熱電対とを有する被覆体 Ceased WO2023219176A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202380038871.XA CN119156500A (zh) 2022-05-13 2023-05-15 具有发热元件和热电偶的包覆体
KR1020247037556A KR20250003785A (ko) 2022-05-13 2023-05-15 발열 요소와 열전쌍을 가지는 피복체
US18/864,971 US20250311057A1 (en) 2022-05-13 2023-05-15 Cover body including heat-generating element and thermocouple

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-079432 2022-05-13
JP2022079432A JP2023167897A (ja) 2022-05-13 2022-05-13 発熱要素と熱電対とを有する被覆体

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WO2023219176A1 true WO2023219176A1 (ja) 2023-11-16

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JP (1) JP2023167897A (https=)
KR (1) KR20250003785A (https=)
CN (1) CN119156500A (https=)
TW (1) TWI870850B (https=)
WO (1) WO2023219176A1 (https=)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA219928S (en) * 2023-03-10 2025-03-03 Ipex Tech Inc Mechanical pipe fitting

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007024830A (ja) * 2005-07-21 2007-02-01 Okazaki Mfg Co Ltd 表面温度計の取付構造
JP2008082775A (ja) * 2006-09-26 2008-04-10 Okazaki Mfg Co Ltd 内面温度測定装置および内面温度測定方法
KR20130080202A (ko) * 2012-01-04 2013-07-12 송범식 파이프 라인 히팅 장치 및 그 제조 방법
JP2017076781A (ja) * 2015-10-16 2017-04-20 株式会社日立国際電気 加熱部、基板処理装置、及び半導体装置の製造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW562854B (en) * 2001-08-13 2003-11-21 New Qu Energy Ltd Heat transfer element with high heat transfer rate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007024830A (ja) * 2005-07-21 2007-02-01 Okazaki Mfg Co Ltd 表面温度計の取付構造
JP2008082775A (ja) * 2006-09-26 2008-04-10 Okazaki Mfg Co Ltd 内面温度測定装置および内面温度測定方法
KR20130080202A (ko) * 2012-01-04 2013-07-12 송범식 파이프 라인 히팅 장치 및 그 제조 방법
JP2017076781A (ja) * 2015-10-16 2017-04-20 株式会社日立国際電気 加熱部、基板処理装置、及び半導体装置の製造方法

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JP2023167897A (ja) 2023-11-24
TWI870850B (zh) 2025-01-21
CN119156500A (zh) 2024-12-17
TW202413901A (zh) 2024-04-01
KR20250003785A (ko) 2025-01-07
US20250311057A1 (en) 2025-10-02

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