JPH0631674B2 - Inner heat-insulating pipe - Google Patents
Inner heat-insulating pipeInfo
- Publication number
- JPH0631674B2 JPH0631674B2 JP62175550A JP17555087A JPH0631674B2 JP H0631674 B2 JPH0631674 B2 JP H0631674B2 JP 62175550 A JP62175550 A JP 62175550A JP 17555087 A JP17555087 A JP 17555087A JP H0631674 B2 JPH0631674 B2 JP H0631674B2
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- pipe
- heat
- insulating layer
- tube
- 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.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 claims description 33
- 229920006254 polymer film Polymers 0.000 claims description 17
- 230000013011 mating Effects 0.000 claims description 9
- 230000008602 contraction Effects 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000009751 slip forming Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000012696 Interfacial polycondensation Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 229920005570 flexible polymer Polymers 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011494 foam glass Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は管の内壁に流体通路を囲む保温層を備え、流体
の輸送途中に流体と管壁との間での熱エネルギーの授受
を逓減する内面保温断熱管に関する。DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention includes a heat insulating layer surrounding a fluid passage on an inner wall of a pipe, and gradually reduces transfer of thermal energy between the fluid and the pipe wall during transportation of the fluid. The inner heat insulating and heat insulating pipe.
〈従来の技術〉 管の内壁に、同心状の流体通路を囲む保温断熱層を網等
で成形したり、接着剤等によって成形した内面保温断熱
管は従来から公知である。<Prior Art> An inner surface heat insulating and heat insulating tube formed by forming a heat insulating and heat insulating layer surrounding a concentric fluid passage with a net or the like on the inner wall of the tube or using an adhesive or the like has been conventionally known.
〈発明が解決しようとする問題点〉 しかし、上記従来例の内面保温断熱管は、 保温断熱層の一部が時間の経過とともに流体通路中を
流れる流体に混ざる虞がある。<Problems to be Solved by the Invention> However, in the heat insulating heat insulating tube of the conventional example, a part of the heat insulating heat insulating layer may be mixed with the fluid flowing in the fluid passage with the passage of time.
保温断熱層の内周面の円滑性が損なわれ、流体通路中
を流れる流体の圧力損失が増加する虞がある。The smoothness of the inner peripheral surface of the heat insulation layer may be impaired, and the pressure loss of the fluid flowing in the fluid passage may increase.
保温断熱層の熱膨張，伸縮が要因となり、該層の形状
変化、亀裂の発生、剥離、管内壁との接着不良等の現象
が生じる。Due to the thermal expansion and expansion and contraction of the heat insulation layer, phenomena such as shape change of the layer, generation of cracks, peeling, and poor adhesion to the inner wall of the pipe occur.
外管との温度差から外観の管長と内面保温断熱管の管
長との間に差が生じ、これにより保温断熱管相互の間に
隙間が生じ、外管の内面に断熱層がない部分が生ずる。Due to the temperature difference with the outer pipe, a difference occurs between the external pipe length and the inner heat insulating and heat insulating pipe length, which creates a gap between the heat insulating and heat insulating pipes, and the inner surface of the outer pipe has no heat insulating layer. .
外管内を流れる流体の流速と粘性により、流れ方向に
内面保温断熱管か移動する力を受け、この残留歪から外
管の内面に断熱層がない部分が生ずる。Due to the flow velocity and viscosity of the fluid flowing in the outer pipe, the inner heat insulating heat insulating pipe receives a moving force in the flow direction, and due to this residual strain, a portion having no heat insulating layer is formed on the inner surface of the outer pipe.
流体通路中を流れる流体が保温断熱層の内部に浸透
し、流体の種類によっては該層の断熱性能を低下させ
る。The fluid flowing in the fluid passage permeates the inside of the heat insulating and heat insulating layer, and reduces the heat insulating performance of the layer depending on the type of the fluid.
外管相互の接続フランジ部には保温断熱層が設けれら
れていないため、配管の熱損失分布は接続フランジ部に
集中して発生する。Since the heat insulation layer is not provided on the connecting flange portion between the outer pipes, the heat loss distribution of the pipe is concentrated on the connecting flange portion.
等の問題点がある。There are problems such as.
〈問題点を解決するための手段〉 そこで本発明は管の内壁に流体通路を囲む保温断熱層を
備えた内面保温断面管において、上記保温断熱層の流体
の接触する内面及び管の接続合せ面を連続して高分子の
膜で覆い、且つ保温断熱層の内面を覆う高分子の膜に熱
膨張伸縮吸収用のベローズ部を設けたことを特徴とす
る。<Means for Solving Problems> Therefore, the present invention relates to an inner surface heat insulating cross-section tube having a heat insulating and heat insulating layer surrounding a fluid passage on an inner wall of the tube, and a connecting mating surface between the inner surface of the heat insulating and heat insulating layer in contact with the fluid and the pipe. Is continuously covered with a polymer film, and the polymer film covering the inner surface of the heat insulating and heat insulating layer is provided with a bellows portion for absorbing thermal expansion and contraction.
〈作用〉 本発明によれば柔軟性がある高分子の膜が保温断熱層の
内面を覆い、流体通路中を流れる流体が保温断熱層に接
触するのを遮ぎる。<Operation> According to the present invention, the flexible polymer film covers the inner surface of the heat insulating and heat insulating layer and blocks the fluid flowing in the fluid passage from coming into contact with the heat insulating and heat insulating layer.
したがって、本発明においては前掲の、、の問題
を解決することができる。Therefore, in the present invention, the above-mentioned problems (1) and (2) can be solved.
また、保温断熱層及び管の接続合せ面に設けた高分子の
膜の接着作用により前掲の〜の問題を解決すること
ができる。Further, the above-mentioned problems (1) to (3) can be solved by the adhesive action of the polymer film provided on the heat insulating layer and the connecting mating surface of the tube.
なお、本発明では保温断熱層を覆う高分子膜の一部にベ
ローズ部を形成してあるため、保温断熱層の高温膨張、
低温収縮をこのベローズ部で吸収し、柔軟に対応するこ
とができる。In the present invention, since the bellows part is formed in a part of the polymer film that covers the heat insulating and heat insulating layer, the high temperature expansion of the heat insulating and heat insulating layer,
Low temperature shrinkage is absorbed by this bellows part, and it is possible to respond flexibly.
更に、本発明では管の接続合せ面にも高分子の膜を設け
てあるため、前掲ので述べた熱損失を大幅に軽減する
ことができる。Further, in the present invention, since the polymer film is also provided on the connecting mating surface of the pipe, the heat loss described above can be greatly reduced.
〈実施例〉 図示の実施例において、１は管、２はその内壁に設けら
れた保温断熱層、３は流体通路、４は前記保温断熱層２
の流体に接触する内面を覆う高分子の膜を示す。<Embodiment> In the illustrated embodiment, 1 is a tube, 2 is a heat insulating and heat insulating layer provided on the inner wall thereof, 3 is a fluid passage, and 4 is the heat insulating and heat insulating layer 2
Figure 3 shows a polymeric membrane covering the inner surface of the fluid in contact with.
管１はボルト、ナットによる接続用のフランジ５を両端
に有し、膜４の各端部は保温断熱層２の各端面と、上記
各フランジ５の接続合せ面沿いに半径方向外向きに部厚
く拡がり、保温断熱層の各端面及び上記各フランジ５の
合せ面を連続して覆う。膜４が合せ面を覆う部分４′
は、フランジ５を当接して相互に二本の管１，１をボル
ト、ナットの締付けで接続する際にガスケットの役目を
兼ねる。管１は鋼管、ステンレス管、銅管、又は高分子
樹脂管、例えば塩化ビニール管である。The pipe 1 has flanges 5 for connection by bolts and nuts at both ends, and each end of the membrane 4 is formed radially outward along each end face of the heat insulation layer 2 and the connection mating face of each flange 5. It spreads thickly and continuously covers each end surface of the heat insulating and heat insulating layer and the mating surface of each flange 5 described above. Part 4'where the membrane 4 covers the mating surface
Serves also as a gasket when the two pipes 1 and 1 are connected to each other by abutting the flange 5 and tightening bolts and nuts. The pipe 1 is a steel pipe, a stainless pipe, a copper pipe, or a polymer resin pipe, for example, a vinyl chloride pipe.
又、膜４の、保温断熱層２を覆う部分の一部にはベロー
ズ部６を形成する。これにより保温断熱層２の高温膨
張、低温収縮をベローズ部６で吸収し、柔軟に対応する
ことができる。Further, a bellows portion 6 is formed on a part of the portion of the film 4 which covers the heat insulating and heat insulating layer 2. Thereby, the high temperature expansion and the low temperature contraction of the heat insulation layer 2 can be absorbed by the bellows portion 6 and can be flexibly dealt with.
流体通路３中を流れる流体が高温（約100 〜250℃）で
ある場合、高分子の膜４の材料はシリコンゴムや、弗化
ビニリデン、四弗化レジン等の弗素系樹脂が適当であ
り、保温断熱層２は発泡ガラス、発泡シリカバブル、微
粒状セラミック、超微粒子珪素化合物、粒状火山噴出軽
石、発泡軽量コンクリート、硅藻土等を用いる。これに
よって太陽熱集熱器に接続する熱媒管、温度変化や流体
が断続するような工場排熱の回収用熱媒管に使用でき
る。When the fluid flowing in the fluid passage 3 is at a high temperature (about 100 to 250 ° C.), the material of the polymer film 4 is suitably silicon rubber, vinylidene fluoride, fluororesin such as tetrafluoride resin, The heat insulation layer 2 is made of foam glass, foam silica bubbles, finely divided ceramics, ultrafine particles of silicon compound, granular volcanic pumice stone, foamed lightweight concrete, diatomaceous earth, or the like. As a result, it can be used as a heat transfer medium pipe connected to the solar heat collector, and as a heat transfer medium pipe for recovering factory exhaust heat where temperature changes and fluid are intermittent.
又、流体通路３中を流れる流体の温度が常温以下の低温
（ -190℃）である場合、高分子の膜はポリエチレンや
ポルスチロールでもよいし、成形樹脂でもよい。又、保
温断熱層２は発泡成形されたスチロール、ウレタン、ポ
リエチレン粒状発泡樹脂、超微粒子粉末、ペーパーロー
ルコア等を用いる。Further, when the temperature of the fluid flowing in the fluid passage 3 is a low temperature (-190 ° C.) or lower than room temperature, the polymer film may be polyethylene, polystyrene, or molding resin. For the heat insulation layer 2, foamed polystyrene, urethane, polyethylene granular foamed resin, ultrafine powder, paper roll core, or the like is used.
次に本発明による内面保温断熱管の製作法を説明する。Next, a method of manufacturing the inner surface heat insulating and heat insulating tube according to the present invention will be described.
方法その１： 外径が管１の内径に適合した保温断熱層２を管状に発泡
成形し、これを高分子の膜４を形成する塗膜剤の液（例
えば耐熱性ポリマ中のカルボキシル基を酸塩化物か、酸
無水物とし活性をもたせ、有機溶媒に溶かしたもの）に
浸漬し、内表面に高分子の塗膜を作り、重縮合反応（界
面重縮合又は溶融重縮合）、加硫等の２次加工により安
定化、固形化を行う。尚、界面重縮合は上記塗膜に水相
にしたジアミンを粉霧状にして通過させることをいう。Method 1: A heat insulation layer 2 having an outer diameter adapted to the inner diameter of the tube 1 is foamed into a tubular shape, which is then used as a coating agent liquid for forming a polymer film 4 (for example, a carboxyl group in a heat resistant polymer Immersion in acid chloride or acid anhydride, which has activity and dissolved in an organic solvent) to form a polymer coating on the inner surface, polycondensation reaction (interfacial polycondensation or melt polycondensation), vulcanization Stabilize and solidify by secondary processing such as. The interfacial polycondensation means passing the diamine in the water phase into the coating film in the form of powder mist.
そして、この管状の保温断熱層２を管１に嵌込み、塗膜
と同質の素材で保温断熱層２の端面と、フランジ５の合
せ面を覆う部厚なリングを成形し、これを管の各端に当
て、リングの内周と膜４の各端との相互の接点4aを高周
波加熱により融着する。Then, the tubular heat insulating and heat insulating layer 2 is fitted into the pipe 1, and a thick ring that covers the end surface of the heat insulating and heat insulating layer 2 and the mating surface of the flange 5 is formed with the same material as the coating film, and this ring is formed. The contact 4a between the inner circumference of the ring and each end of the film 4 is applied to each end, and fusion is performed by high frequency heating.
尚、この実施例では内周の高分子の膜４を浸漬法により
作るため、管状に発泡成形した保温断熱層２には外周に
も、両端面にも高分子の膜が形成されるが、勿論、何等
支障はない。In this embodiment, since the polymer film 4 on the inner circumference is formed by the dipping method, the polymer film 4 is formed on both the outer circumference and both end surfaces of the heat insulation and heat insulation layer 2 foamed into a tubular shape. Of course, there is no problem.
方法その２： 内側の膜２となる所要直径の筒（肉厚0.1 〜1.0 mm程
度）と、保温断熱層２の端面及びフランジ５の合せ面を
覆う部厚がリングを夫々高分子材料で成形し、上記筒の
一端をリングの内周沿いに熱融着して管１の中に収納
し、筒の他端側から筒の外周と管１の内周の筒形空間に
粒状、粉体、バルク状の断熱材を詰め込むか、或いはグ
ラスウール、ロックウール、ポリスチロール等で管状に
成形した断熱材を押込んで保温断熱層２を構成し、それ
からもう一枚のリングを上記筒形成空間の端面にあてが
い、該リングの内周を高分子膜である筒の他端に熱融着
し、筒形空間を塞ぐ。Method 2: A cylinder (wall thickness of about 0.1 to 1.0 mm) to be the inner membrane 2 and a ring formed of a polymer material so as to cover the end surface of the heat insulation layer 2 and the mating surface of the flange 5 respectively. Then, one end of the cylinder is heat-fused along the inner circumference of the ring and accommodated in the tube 1, and the granular shape is formed from the other end side of the cylinder to the outer space of the cylinder and the inner cylindrical space of the tube. , The bulk insulation material is packed, or the insulation material formed into a tubular shape with glass wool, rock wool, polystyrene, etc. is pushed to form the heat insulation layer 2, and then another ring is attached to the end surface of the cylinder forming space. Then, the inner circumference of the ring is heat-sealed to the other end of the cylinder, which is a polymer film, to close the cylindrical space.
そして、ベローズ部６は、必要に応じ高分子膜である筒
の一部に事前に熱成形加工で作るか、或いは筒を成形す
るときに同時に成形すればよい。If necessary, the bellows portion 6 may be formed by thermoforming in advance in a part of the tube which is a polymer film, or may be formed at the same time when the tube is formed.
〈発明の効果〉 本発明によれば内面保温断熱管としての長所、つまり管
１やそのフランジ部等熱容量の大きな部材が流体から断
熱されるため、変温時の熱損失を逓減出来る。又、断熱
層が外装方式の如く、吸湿等による断熱性能を損なうこ
となく従来不可能であった高信頼性の内面保温断熱管が
実現できる。<Effects of the Invention> According to the present invention, the advantage of the inner surface heat insulating and heat insulating pipe, that is, the member having a large heat capacity such as the pipe 1 and the flange portion thereof is insulated from the fluid, so that the heat loss at the time of temperature change can be gradually reduced. Further, as in the case where the heat insulating layer is of the exterior type, it is possible to realize a highly reliable inner heat insulating heat insulating tube which has been impossible in the past without impairing the heat insulating performance due to moisture absorption or the like.
即ち、保温断熱層の内面を耐温度特性を有する高分子の
膜が覆い、流体通路中を流れる流体と、保温断熱層を隔
離するので長期間使用しても流体中に保温断熱層が混入
しないと共に、逆に流体が保温断熱層中に浸透して断熱
効果を低下させることがない。That is, the inner surface of the heat insulating and heat insulating layer is covered with a polymer film having temperature resistance, and the heat insulating and heat insulating layer is separated from the fluid flowing in the fluid passage, so that the heat insulating and heat insulating layer does not mix into the fluid even after long-term use. At the same time, on the contrary, the fluid does not permeate into the heat insulating and heat insulating layer to reduce the heat insulating effect.
更に、一般に高分子材料は摩擦係数が小さく、粘着親和
性が少ないため、流体通路中を流れる流体の圧力損失も
少なくなる。Further, in general, a polymeric material has a small friction coefficient and a low adhesive affinity, so that the pressure loss of the fluid flowing in the fluid passage is also reduced.
第１図は本発明の内面保温管の一実施例の管長に沿った
断面図、第２図は第１図のII−II線での断面図である。 図中、１は管、２は保温断熱層、３は流体通路、４は高
分子の膜を示す。FIG. 1 is a sectional view taken along the pipe length of an embodiment of the inner heat retaining tube of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG. In the figure, 1 is a tube, 2 is a heat insulating layer, 3 is a fluid passage, and 4 is a polymer film.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 谷 辰夫 茨城県新治郡桜村梅園１丁目１番４号 電 子技術総合研究所内 (56)参考文献 特開 昭54−62556（ＪＰ，Ａ) 実公 昭60−11354（ＪＰ，Ｙ１ Ｔ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuo Tani, 1-4 1-4 Umezono, Sakuramura, Shinji-gun, Ibaraki Electronic Research Institute (56) Reference JP 54-62556 (JP, A) Sho-60-11354 (JP, Y1 T)
Claims (1)
えた内面保温断熱管において； 上記保温断熱層の流体の接触する内面及び管の接続合せ
面を連続して高分子の膜で覆い、且つ保温断熱層の内面
を覆う高分子の膜に熱膨張伸縮吸収用のベローズ部を設
けたことを特徴とする内面保温断熱管。1. An inner surface heat insulating and heat insulating tube having a heat insulating and heat insulating layer surrounding a fluid passage on an inner wall of the tube; an inner surface of the heat insulating and heat insulating layer in contact with fluid and a connecting mating surface of the tube are continuously formed of a polymer film. An inner heat insulating and heat insulating pipe, comprising a polymer film covering and covering the inner surface of the heat insulating and heat insulating layer, and a bellows portion for thermal expansion, contraction, expansion and absorption provided on the polymer film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62175550A JPH0631674B2 (en) | 1987-07-14 | 1987-07-14 | Inner heat-insulating pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62175550A JPH0631674B2 (en) | 1987-07-14 | 1987-07-14 | Inner heat-insulating pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6421298A JPS6421298A (en) | 1989-01-24 |
| JPH0631674B2 true JPH0631674B2 (en) | 1994-04-27 |
Family
ID=15998041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62175550A Expired - Lifetime JPH0631674B2 (en) | 1987-07-14 | 1987-07-14 | Inner heat-insulating pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0631674B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03130991U (en) * | 1990-04-13 | 1991-12-27 | ||
| JP7202564B2 (en) * | 2018-11-22 | 2023-01-12 | 高砂熱学工業株式会社 | Heat-insulating duct, method for manufacturing heat-insulating duct, and method for installing heat-insulating duct |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6011354U (en) * | 1983-06-30 | 1985-01-25 | 京セラミタ株式会社 | Copying machine developing device |
-
1987
- 1987-07-14 JP JP62175550A patent/JPH0631674B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6421298A (en) | 1989-01-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |