JP2016138644A - Spacer for double tube - Google Patents
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- JP2016138644A JP2016138644A JP2015015552A JP2015015552A JP2016138644A JP 2016138644 A JP2016138644 A JP 2016138644A JP 2015015552 A JP2015015552 A JP 2015015552A JP 2015015552 A JP2015015552 A JP 2015015552A JP 2016138644 A JP2016138644 A JP 2016138644A
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本発明は、内管と外管との間に配置される二重管用スペーサに関する。 The present invention relates to a double pipe spacer arranged between an inner pipe and an outer pipe.
従来、工場等から排出された汚水は、配管設備を介して汚水処理施設まで移送される。また、化学薬品および高圧ガス等は、配管設備を介して工場内に移送される。このような配管設備としては、配管の途中や配管同士を連結する連結箇所等で汚水、化学薬品、および、高圧ガス等の流体が漏れることを防止するため、例えば、二重管用スペーサを介して内管および外管を同心円状に配置した二重管構造の配管が使用されることがある。二重管構造の配管は、内管を通して流体を移送する一方、外管が流体の流出を防止する保護管として機能する。このため、内管の一部が破損した場合であっても、内管の内部の流体が配管設備の外部に流出することを外管により防止できる。 Conventionally, sewage discharged from a factory or the like is transferred to a sewage treatment facility through piping equipment. Moreover, chemicals, high-pressure gas, and the like are transferred into the factory through piping equipment. As such piping equipment, in order to prevent fluids such as sewage, chemicals, and high-pressure gas from leaking in the middle of piping or at connecting points connecting pipes, for example, via a double pipe spacer A pipe having a double pipe structure in which an inner pipe and an outer pipe are concentrically arranged may be used. The pipe having a double-pipe structure functions as a protective pipe that transfers fluid through the inner pipe while the outer pipe prevents the fluid from flowing out. For this reason, even when a part of the inner pipe is damaged, the outer pipe can prevent the fluid inside the inner pipe from flowing out of the piping facility.
特許文献１は、従来の二重管用スペーサの一例を開示している。この二重管用スペーサは、内管を支持する内管支持面が形成された円筒状の内管支持部、および、内管が内部に配置される外管を支持する複数の外管支持部を備える。外管支持部は、内管支持部の表面から内管支持部の径方向に延伸している。内管支持部に内管が挿入された後、内管および二重管用スペーサが外管に挿入される。これにより、外管支持部の先端面と外管の内面とが接触し、内管の表面と外管の内面との間に外管支持部の長さに応じた所定の間隔が形成される。 Patent Document 1 discloses an example of a conventional double pipe spacer. This double pipe spacer includes a cylindrical inner pipe support portion formed with an inner pipe support surface for supporting the inner pipe, and a plurality of outer pipe support portions for supporting the outer pipe in which the inner pipe is disposed. Prepare. The outer tube support portion extends in the radial direction of the inner tube support portion from the surface of the inner tube support portion. After the inner tube is inserted into the inner tube support portion, the inner tube and the double tube spacer are inserted into the outer tube. Thereby, the front end surface of the outer tube support portion and the inner surface of the outer tube are in contact with each other, and a predetermined interval corresponding to the length of the outer tube support portion is formed between the surface of the inner tube and the inner surface of the outer tube. .
特許文献１の二重管用スペーサは、内管の表面と外管の内面との間に形成する間隔に応じて、外管支持部を切断することにより外管支持部の長さを調節する必要がある。このため、二重管を施工する際の作業効率が低下するおそれがある。 The double-pipe spacer of Patent Document 1 needs to adjust the length of the outer tube support by cutting the outer tube support according to the interval formed between the inner tube surface and the outer tube inner surface. There is. For this reason, there exists a possibility that the working efficiency at the time of constructing a double pipe may fall.
本発明の目的は、二重管を施工する際の作業効率が向上される二重管用スペーサを提供することである。 The objective of this invention is providing the spacer for double pipes which the working efficiency at the time of constructing a double pipe is improved.
上記の目的を達成するための二重管用スペーサは、樹脂材料により形成される二重管用スペーサであって、内管を支持する内管支持面が形成された円筒状の内管支持部と、前記内管が内部に配置される外管を支持する複数の外管支持部と、前記内管支持部と前記外管支持部とを接続する接続部とを備え、前記接続部を支点として前記内管支持部に接近するように前記外管支持部が弾性変形できる。 The double pipe spacer for achieving the above object is a double pipe spacer formed of a resin material, and has a cylindrical inner pipe support portion formed with an inner pipe support surface for supporting the inner pipe, A plurality of outer tube support portions for supporting an outer tube in which the inner tube is disposed; and a connection portion for connecting the inner tube support portion and the outer tube support portion, with the connection portion as a fulcrum. The outer tube support portion can be elastically deformed so as to approach the inner tube support portion.
この二重管用スペーサによれば、内管に配置された二重管用スペーサを外管に挿入するとき、内管の表面と外管の内面との間に形成する間隔に応じて外管支持部が接続部を支点として内管支持部に接近するように弾性変形する。このため、作業者が外管支持部に特別な加工を施すことなく二重管を施工でき、二重管を施工する際の作業効率が向上される。 According to this double pipe spacer, when the double pipe spacer arranged in the inner pipe is inserted into the outer pipe, the outer pipe support portion is formed according to the interval formed between the inner pipe surface and the outer pipe inner surface. Is elastically deformed so as to approach the inner tube support portion with the connection portion as a fulcrum. For this reason, an operator can construct a double pipe without performing a special process to an outer pipe support part, and the work efficiency at the time of constructing a double pipe is improved.
上記の目的を達成するための二重管用スペーサにおいて、前記外管支持部において前記外管に面する外面は、前記外管の内面と接触して前記外管を支持する接触部、および、前記接触部の周囲に形成され、前記外管の内面と接触しない非接触部を含む。 In the double pipe spacer for achieving the above object, an outer surface facing the outer pipe in the outer pipe support portion is in contact with an inner surface of the outer pipe to support the outer pipe, and A non-contact portion formed around the contact portion and not in contact with the inner surface of the outer tube is included.
この二重管用スペーサによれば、外管支持部の外面が接触部および非接触部を含むため、外管支持部の外面の全体が外管の内面と接触する場合と比較して、外管支持部の外面と外管の内面との接触面積が小さくなり、外管支持部の外面と外管の内面との摺動抵抗が小さくなる。このため、作業者は、内管に配置された二重管用スペーサをよりスムーズに外管に挿入することができ、二重管を施工する際の作業効率がより向上される。 According to this double pipe spacer, since the outer surface of the outer tube support part includes the contact part and the non-contact part, the outer pipe is compared with the case where the entire outer surface of the outer pipe support part is in contact with the inner surface of the outer pipe. The contact area between the outer surface of the support portion and the inner surface of the outer tube is reduced, and the sliding resistance between the outer surface of the outer tube support portion and the inner surface of the outer tube is reduced. For this reason, the operator can insert the spacer for double pipes arranged in the inner pipe into the outer pipe more smoothly, and the work efficiency when constructing the double pipe is further improved.
上記の目的を達成するための二重管用スペーサにおいて、前記接触部は、前記内管支持部の径方向の外方に向けて突出する曲面である。
この二重管用スペーサによれば、接触部は、内管支持部の径方向の外方に向けて突出する曲面であるため、外管支持部の外面と外管の内面との接触面積がより小さくなり、外管支持部の外面と外管の内面との摺動抵抗がより小さくなる。このため、作業者は、内管に配置された二重管用スペーサをよりスムーズに外管に挿入することができ、二重管を施工する際の作業効率が一層向上される。
In the double tube spacer for achieving the above object, the contact portion is a curved surface protruding outward in the radial direction of the inner tube support portion.
According to this double tube spacer, the contact portion is a curved surface protruding outward in the radial direction of the inner tube support portion, so that the contact area between the outer surface of the outer tube support portion and the inner surface of the outer tube is further increased. The sliding resistance between the outer surface of the outer tube support portion and the inner surface of the outer tube becomes smaller. For this reason, the operator can more smoothly insert the double pipe spacer disposed in the inner pipe into the outer pipe, and the work efficiency when constructing the double pipe is further improved.
上記の目的を達成するための二重管用スペーサにおいて、前記接触部は、前記外管の内面と点接触する形状である。
この二重管用スペーサによれば、接触部が外管の内面と点接触する形状であるため、外管支持部の外面と外管の内面との摺動抵抗がより小さくなり、二重管を施工する際の作業効率がより向上される。
In the double pipe spacer for achieving the above object, the contact portion has a shape that makes point contact with the inner surface of the outer pipe.
According to this double pipe spacer, since the contact portion is in point contact with the inner surface of the outer tube, the sliding resistance between the outer surface of the outer tube support portion and the inner surface of the outer tube is further reduced. Work efficiency at the time of construction is further improved.
また、例えば、二重管が設置面に対して間隔をあけて平行に配置される場合、内管が自重により変形し、内管の表面と外管の内面との間隔が変化することがある。二重管用スペーサは、内管が自重により変形したとき、接続部を支点として内管支持部に接近するように外管支持部が弾性変形する。これにより、接触部が内管の径方向の延長線上に位置するように変位し、内管に対して垂直である位置を維持する。このため、接触部は、外管の内面と点接触した状態を維持する。これにより、内管のうちの変形している部分の基端部にかかる負荷が低減され、内管の耐久性が向上される。 In addition, for example, when the double pipe is arranged parallel to the installation surface with a gap, the inner pipe may be deformed by its own weight, and the distance between the inner pipe surface and the outer pipe inner surface may change. . In the double tube spacer, when the inner tube is deformed by its own weight, the outer tube support portion is elastically deformed so as to approach the inner tube support portion with the connection portion as a fulcrum. Accordingly, the contact portion is displaced so as to be positioned on the radial extension line of the inner tube, and a position perpendicular to the inner tube is maintained. For this reason, a contact part maintains the state which carried out point contact with the inner surface of an outer tube | pipe. Thereby, the load concerning the base end part of the deformed part of the inner pipe is reduced, and the durability of the inner pipe is improved.
二重管用スペーサによれば、二重管を施工する際の作業効率が向上される。 According to the double pipe spacer, the working efficiency when constructing the double pipe is improved.
（第１実施形態）
図１を参照して、二重管用スペーサ１の構成について説明する。
二重管用スペーサ１は、円筒状の内管支持部１０、内管６０（図２参照）が内部に配置される外管７０（図３参照）を支持する複数の外管支持部４０、および、内管支持部１０と外管支持部４０とを接続する接続部５０を備える。内管支持部１０と内管６０とを接着して固定する場合、二重管用スペーサ１を構成する材料は、内管６０を構成する材料と同じ材料でありリサイクル可能な合成樹脂が好ましい。二重管用スペーサ１を構成する材料の好ましい一例は、硬質ポリ塩化ビニル等の合成樹脂である。内管支持部１０、外管支持部４０、および、接続部５０は、一体的に形成されている。
(First embodiment)
With reference to FIG. 1, the structure of the spacer 1 for double tubes is demonstrated.
The double pipe spacer 1 includes a cylindrical inner pipe support section 10, a plurality of outer pipe support sections 40 that support an outer pipe 70 (see FIG. 3) in which the inner pipe 60 (see FIG. 2) is disposed, and The connection part 50 which connects the inner pipe support part 10 and the outer pipe support part 40 is provided. When the inner pipe support 10 and the inner pipe 60 are bonded and fixed, the material constituting the double pipe spacer 1 is the same material as that constituting the inner pipe 60 and is preferably a recyclable synthetic resin. A preferred example of the material constituting the double tube spacer 1 is a synthetic resin such as hard polyvinyl chloride. The inner tube support portion 10, the outer tube support portion 40, and the connection portion 50 are integrally formed.
内管支持部１０の内周には、内管６０を支持する内管支持面１１が形成され、周方向の一部に切り欠き１２が形成されている。内管支持部１０の外周面１３および上面１４には、内管６０を内管支持面１１に案内する案内部３０が形成されている。 An inner tube support surface 11 that supports the inner tube 60 is formed on the inner periphery of the inner tube support portion 10, and a notch 12 is formed in a part of the circumferential direction. A guide portion 30 that guides the inner tube 60 to the inner tube support surface 11 is formed on the outer peripheral surface 13 and the upper surface 14 of the inner tube support portion 10.
案内部３０は、内管支持部１０の周方向に一例として３つ形成され、３つの案内部３０は実質的に同一の構造を有する。案内部３０の内面３０Ａは、内管支持面１１と面一に形成されている。案内部３０は、内管支持部１０の上面１４から二重管用スペーサ１の高さ方向に延びる突出部３１、および、接続部５０と繋がる連続部３２を備える。 Three guide portions 30 are formed as an example in the circumferential direction of the inner tube support portion 10, and the three guide portions 30 have substantially the same structure. The inner surface 30A of the guide portion 30 is formed flush with the inner tube support surface 11. The guide portion 30 includes a protruding portion 31 extending in the height direction of the double pipe spacer 1 from the upper surface 14 of the inner tube support portion 10 and a continuous portion 32 connected to the connection portion 50.
突出部３１の基端３１Ａは、内管支持部１０の上面１４と繋がり、先端３１Ｂにはテーパ面が形成されている。
外管支持部４０は、内管支持部１０の周方向に一例として３つ形成され、３つの外管支持部４０は実質的に同一の構造を有する。外管支持部４０は、連続部３２と間隔をあけて対向し、接続部５０の第１の接続部５１を支点として内管支持部１０に接近するように弾性変形する。外管支持部４０の先端４１Ｂは、二重管用スペーサ１の高さ方向において、突出部３１の先端３１Ｂよりも低い位置に存在している。外管支持部４０のうちの外管７０に面する面である外面４１Ａは、外管７０の内面と接触して外管７０を支持する接触部４２、および、接触部４２の周囲に形成され、外管７０の内面と接触しない非接触部４３を含む。
The base end 31A of the protruding portion 31 is connected to the upper surface 14 of the inner tube support portion 10, and a tapered surface is formed at the distal end 31B.
Three outer tube support portions 40 are formed as an example in the circumferential direction of the inner tube support portion 10, and the three outer tube support portions 40 have substantially the same structure. The outer tube support portion 40 is opposed to the continuous portion 32 with a gap, and is elastically deformed so as to approach the inner tube support portion 10 with the first connection portion 51 of the connection portion 50 as a fulcrum. The distal end 41B of the outer tube support portion 40 is present at a position lower than the distal end 31B of the protruding portion 31 in the height direction of the double tube spacer 1. An outer surface 41 </ b> A that is a surface facing the outer tube 70 of the outer tube support portion 40 is formed around the contact portion 42 that contacts the inner surface of the outer tube 70 and supports the outer tube 70, and the contact portion 42. The non-contact part 43 which does not contact the inner surface of the outer tube | pipe 70 is included.
接触部４２は、内管支持部１０の径方向の外方に向けて突出する曲面であり、外管７０の内面と点接触する形状である。外面４１Ａのうちの接触部４２の面積は、外面４１Ａのうちの非接触部４３の面積よりも小さい。接触部４２は、内管支持部１０の高さ方向の幅内に形成されている。内管支持部１０の径方向における内管支持面１１と接触部４２との距離は、内管６０の表面と外管７０の内面との距離、すなわち、内管６０と外管７０との間に形成される間隔よりも長く設定されている。 The contact portion 42 is a curved surface that protrudes outward in the radial direction of the inner tube support portion 10, and has a shape that makes point contact with the inner surface of the outer tube 70. The area of the contact portion 42 in the outer surface 41A is smaller than the area of the non-contact portion 43 in the outer surface 41A. The contact portion 42 is formed within the width in the height direction of the inner tube support portion 10. The distance between the inner tube support surface 11 and the contact portion 42 in the radial direction of the inner tube support portion 10 is the distance between the surface of the inner tube 60 and the inner surface of the outer tube 70, that is, between the inner tube 60 and the outer tube 70. It is set longer than the interval formed.
接続部５０は、外管支持部４０と内管支持部１０の下面１５および連続部３２とを繋ぐ第１の接続部５１、および、外管支持部４０の内面４１Ｃと連続部３２とを繋ぐ第２の接続部５２を備える。 The connection portion 50 connects the first connection portion 51 that connects the outer tube support portion 40 to the lower surface 15 of the inner tube support portion 10 and the continuous portion 32, and the inner surface 41 </ b> C of the outer tube support portion 40 and the continuous portion 32. A second connection part 52 is provided.
図２および図３を参照して二重管用スペーサ１の作用および効果について説明する。
図２に示されるように、内管６０が、内管支持部１０の案内部３０を介して内管支持部１０に挿入される。これにより、内管支持面１１と内管６０の外面とが接触し、内管支持部１０が内管６０を支持する。なお、内管６０の長さに応じて、複数個の二重管用スペーサ１が内管６０に取り付けられる。また、内管６０の表面と内管支持面１１とを接着してもよい。
The operation and effect of the double-pipe spacer 1 will be described with reference to FIGS.
As shown in FIG. 2, the inner tube 60 is inserted into the inner tube support portion 10 via the guide portion 30 of the inner tube support portion 10. Thereby, the inner tube support surface 11 and the outer surface of the inner tube 60 come into contact with each other, and the inner tube support portion 10 supports the inner tube 60. Depending on the length of the inner tube 60, a plurality of double tube spacers 1 are attached to the inner tube 60. Further, the surface of the inner tube 60 and the inner tube support surface 11 may be bonded.
図３に示されるように、内管６０、および、二重管用スペーサ１が外管７０に挿入される。このとき、外管７０と内管６０との直径の差、すなわち、内管６０と外管７０との間に形成される間隔に応じて、外管支持部４０が第１の接続部５１を支点として内管支持部１０に接近するように弾性変形する。このため、作業者は、外管支持部４０に特別な加工を施すことなく二重管を施工できるため、二重管を施工する際の作業効率が向上される。 As shown in FIG. 3, the inner tube 60 and the double tube spacer 1 are inserted into the outer tube 70. At this time, the outer tube support portion 40 connects the first connecting portion 51 in accordance with the difference in diameter between the outer tube 70 and the inner tube 60, that is, according to the interval formed between the inner tube 60 and the outer tube 70. It elastically deforms so as to approach the inner pipe support 10 as a fulcrum. For this reason, since an operator can construct a double pipe without performing a special process to the outer pipe support part 40, the work efficiency at the time of constructing a double pipe is improved.
本実施形態の二重管用スペーサ１によれば、さらに以下の効果が得られる。
（１）外管支持部４０の外面４１Ａが接触部４２および非接触部４３を含むため、外管支持部４０の外面４１Ａの全体が外管７０の内面と接触する場合と比較して、外管支持部４０の外面４１Ａと外管７０の内面との接触面積が小さくなる。このため、外管支持部４０の外面４１Ａと外管７０の内面との摺動抵抗が小さくなる。このため、作業者は、内管６０に配置された二重管用スペーサ１をよりスムーズに外管７０に挿入することができ、二重管を施工する際の作業効率がより向上される。
According to the double pipe spacer 1 of the present embodiment, the following effects can be further obtained.
(1) Since the outer surface 41A of the outer tube support portion 40 includes the contact portion 42 and the non-contact portion 43, the outer surface 41A of the outer tube support portion 40 has an outer surface compared to the case where the entire outer surface 41A contacts the inner surface of the outer tube 70. The contact area between the outer surface 41A of the tube support portion 40 and the inner surface of the outer tube 70 is reduced. For this reason, the sliding resistance between the outer surface 41A of the outer tube support portion 40 and the inner surface of the outer tube 70 is reduced. For this reason, the operator can more smoothly insert the double pipe spacer 1 arranged in the inner pipe 60 into the outer pipe 70, and the work efficiency when constructing the double pipe is further improved.
（２）接触部４２は、内管支持部１０の径方向の外方に向けて突出する曲面であるため、外管支持部４０の外面４１Ａと外管７０の内面との接触面積がより小さくなり、外管支持部４０の外面４１Ａと外管７０の内面との摺動抵抗がより小さくなる。このため、作業者は、内管６０に配置された二重管用スペーサ１をよりスムーズに外管７０に挿入することができ、二重管を施工する際の作業効率が一層向上される。 (2) Since the contact portion 42 is a curved surface protruding outward in the radial direction of the inner tube support portion 10, the contact area between the outer surface 41A of the outer tube support portion 40 and the inner surface of the outer tube 70 is smaller. Thus, the sliding resistance between the outer surface 41A of the outer tube support portion 40 and the inner surface of the outer tube 70 becomes smaller. For this reason, the operator can more smoothly insert the double pipe spacer 1 arranged in the inner pipe 60 into the outer pipe 70, and the work efficiency when constructing the double pipe is further improved.
（３）外管支持部４０は、接続部５０の第１の接続部５１を支点として内管支持部１０に接近するように弾性変形するため、第１の接続部５１に負荷がかかりやすい。二重管用スペーサ１は、第２の接続部５２を含むため、外管支持部４０が弾性変形するときの第１の接続部５１に作用する負荷を低減できる。このため、第１の接続部５１の耐久性が向上される。 (3) Since the outer tube support portion 40 is elastically deformed so as to approach the inner tube support portion 10 using the first connection portion 51 of the connection portion 50 as a fulcrum, a load is easily applied to the first connection portion 51. Since the double tube spacer 1 includes the second connection portion 52, the load acting on the first connection portion 51 when the outer tube support portion 40 is elastically deformed can be reduced. For this reason, durability of the 1st connection part 51 is improved.
（４）外管７０に径方向の衝撃が加わった場合、外管支持部４０が第１の接続部５１を支点として内管支持部１０に接近するように弾性変形するため、二重管用スペーサ１が衝撃の一部または全部を吸収できる。このため、内管６０に衝撃が伝わりにくく、内管６０の耐久性が向上される。 (4) When a radial impact is applied to the outer tube 70, the outer tube support portion 40 is elastically deformed so as to approach the inner tube support portion 10 with the first connection portion 51 as a fulcrum. 1 can absorb some or all of the impact. For this reason, an impact is difficult to be transmitted to the inner tube 60, and the durability of the inner tube 60 is improved.
（５）例えば、内管６０の内部の急激な圧力変化に起因してウォーターハンマーが生じて内管６０が振動しても、外管支持部４０が弾性変形できるため、二重管用スペーサ１が衝撃の一部または全部を吸収できる。このため、外管７０に衝撃が伝わりにくく、外管７０の耐久性が向上される。 (5) For example, even if a water hammer occurs due to a sudden pressure change inside the inner tube 60 and the inner tube 60 vibrates, the outer tube support 40 can be elastically deformed. Can absorb some or all of the impact. For this reason, an impact is not easily transmitted to the outer tube 70, and the durability of the outer tube 70 is improved.
（６）例えば、二重管が設置面に対して平行に配置される場合、内管６０の内部の流体の重み、または、内管６０の自重により内管６０が変形し、内管６０の表面と外管７０の内面との間隔が変化することがある。二重管用スペーサ１は、内管６０が自重により変形したときに、外管支持部４０が、第１の接続部５１を支点として内管支持部１０に接近するように弾性変形する。これにより、接触部４２が内管６０の径方向の延長線上に位置するように変位し、内管６０に対して垂直である位置を維持する。このため、接触部４２は、外管７０の内面と点接触した状態を維持する。これにより、内管６０のうちの変形している部分の基端にかかる負荷が低減され、内管６０の耐久性が向上される。 (6) For example, when the double pipe is arranged in parallel to the installation surface, the inner pipe 60 is deformed by the weight of the fluid inside the inner pipe 60 or the own weight of the inner pipe 60, and the inner pipe 60 The distance between the surface and the inner surface of the outer tube 70 may change. When the inner tube 60 is deformed by its own weight, the double tube spacer 1 is elastically deformed so that the outer tube support portion 40 approaches the inner tube support portion 10 with the first connection portion 51 as a fulcrum. Accordingly, the contact portion 42 is displaced so as to be positioned on the radial extension line of the inner tube 60, and the position perpendicular to the inner tube 60 is maintained. For this reason, the contact part 42 maintains the state which carried out point contact with the inner surface of the outer tube | pipe 70. FIG. Thereby, the load applied to the proximal end of the deformed portion of the inner tube 60 is reduced, and the durability of the inner tube 60 is improved.
（７）内管支持部１０に切り欠き１２が形成されているため、内管支持部１０が径方向に変形でき、内管６０を内管支持部１０に挿入しやすい。
（８）内管６０が内管支持部１０に挿入されるとき、案内部３０により内管６０の先端の径方向の位置決めがなされた後、内管６０が内管支持部１０に挿入される。このため、内管６０を内管支持部１０に挿入しやすい。
(7) Since the notch 12 is formed in the inner tube support portion 10, the inner tube support portion 10 can be deformed in the radial direction, and the inner tube 60 can be easily inserted into the inner tube support portion 10.
(8) When the inner tube 60 is inserted into the inner tube support portion 10, the inner tube 60 is inserted into the inner tube support portion 10 after the guide portion 30 has positioned the distal end of the inner tube 60 in the radial direction. . For this reason, it is easy to insert the inner tube 60 into the inner tube support 10.
（第２実施形態）
図４を参照して、第２実施形態の二重管用スペーサ１の構成について、第１実施形態の二重管用スペーサ１の構成との相違点を中心に説明する。
(Second Embodiment)
With reference to FIG. 4, the configuration of the double-pipe spacer 1 of the second embodiment will be described focusing on the differences from the configuration of the double-pipe spacer 1 of the first embodiment.
二重管用スペーサ１は、円筒状の内管支持部２１０、内管６０（図２参照）が内部に配置される外管７０（図３参照）を支持する複数の外管支持部２４０、および、内管支持部２１０と外管支持部２４０とを接続する接続部２５０を備える。内管支持部２１０と内管６０とを接着して固定する場合、二重管用スペーサ１を構成する材料は、内管６０を構成する材料と同じ材料でありリサイクル可能な合成樹脂が好ましい。二重管用スペーサ１を構成する材料の好ましい一例は、硬質ポリ塩化ビニル等の合成樹脂である。内管支持部２１０、外管支持部２４０、および、接続部２５０は、一体的に形成されている。 The double pipe spacer 1 includes a cylindrical inner pipe support section 210, a plurality of outer pipe support sections 240 that support an outer pipe 70 (see FIG. 3) in which the inner pipe 60 (see FIG. 2) is disposed, and And a connecting portion 250 for connecting the inner tube support portion 210 and the outer tube support portion 240. When the inner tube support part 210 and the inner tube 60 are bonded and fixed, the material constituting the double tube spacer 1 is the same material as the material constituting the inner tube 60 and is preferably a recyclable synthetic resin. A preferred example of the material constituting the double tube spacer 1 is a synthetic resin such as hard polyvinyl chloride. The inner tube support portion 210, the outer tube support portion 240, and the connection portion 250 are integrally formed.
内管支持部２１０の内周には、内管６０を支持する内管支持面２１１が形成され、周方向の一部に切り欠き２１２が形成されている。内管支持部２１０の上面２１４には、内管６０を内管支持面２１１に案内する案内部２３０が形成されている。 An inner tube support surface 211 that supports the inner tube 60 is formed on the inner periphery of the inner tube support portion 210, and a notch 212 is formed in a part of the circumferential direction. A guide portion 230 that guides the inner tube 60 to the inner tube support surface 211 is formed on the upper surface 214 of the inner tube support portion 210.
案内部２３０は、内管支持部２１０の周方向に沿って形成され、案内部２３０の内面２３０Ａは、内管支持面２１１と連続的に形成されている。案内部２３０は、内管支持部２１０の上面２１４から二重管用スペーサ１の高さ方向に延びる形状である。 The guide portion 230 is formed along the circumferential direction of the inner tube support portion 210, and the inner surface 230 </ b> A of the guide portion 230 is formed continuously with the inner tube support surface 211. The guide part 230 has a shape extending in the height direction of the double pipe spacer 1 from the upper surface 214 of the inner pipe support part 210.
外管支持部２４０は、内管支持部２１０の周方向に一例として３つ形成されている。３つの外管支持部２４０は実質的に同一の構造を有する。外管支持部２４０は、内管支持部１０の外周面２１３と間隔をあけて対向し、接続部２５０を支点として内管支持部２１０に接近するように弾性変形する。外管支持部２４０のうちの外管７０に面する面である外面２４１Ａは、外管７０の内面と接触して外管７０を支持する接触部２４２、および、接触部２４２の周囲に形成され、外管７０の内面と接触しない非接触部２４３を含む。 For example, three outer tube support portions 240 are formed in the circumferential direction of the inner tube support portion 210. The three outer tube support portions 240 have substantially the same structure. The outer tube support portion 240 faces the outer peripheral surface 213 of the inner tube support portion 10 with a gap, and elastically deforms so as to approach the inner tube support portion 210 with the connection portion 250 as a fulcrum. Outer surface 241A of outer tube support portion 240 that faces outer tube 70 is formed around contact portion 242 that contacts outer surface 70 of outer tube 70 and supports outer tube 70, and around contact portion 242. The non-contact part 243 which does not contact the inner surface of the outer tube 70 is included.
接触部２４２は、内管支持部２１０の径方向の外方に向けて突出する曲面であり、外管７０と点接触する形状である。外面２４１Ａのうちの接触部２４２の面積は、外面２４１Ａのうちの非接触部２４３の面積の面積よりも小さい。接触部２４２は、内管支持部２１０の高さ方向の幅内に形成されている。内管支持部２１０の径方向における内管支持面２１１と接触部２４２との距離は、内管６０の表面と外管７０の内面との距離、すなわち、内管６０と外管７０との間に形成される間隔よりも長く設定されている。接続部２５０は、外管支持部２４０と内管支持部２１０の外周面２１３とを繋いでいる。 The contact portion 242 is a curved surface that protrudes outward in the radial direction of the inner tube support portion 210, and has a shape that makes point contact with the outer tube 70. The area of the contact portion 242 in the outer surface 241A is smaller than the area of the area of the non-contact portion 243 in the outer surface 241A. The contact part 242 is formed within the width of the inner pipe support part 210 in the height direction. The distance between the inner tube support surface 211 and the contact portion 242 in the radial direction of the inner tube support portion 210 is the distance between the surface of the inner tube 60 and the inner surface of the outer tube 70, that is, between the inner tube 60 and the outer tube 70. It is set longer than the interval formed. The connection part 250 connects the outer pipe support part 240 and the outer peripheral surface 213 of the inner pipe support part 210.
二重管用スペーサ１によれば、上記（１）、（２）、および、（４）〜（８）に準じた効果が得られる。
（変形例）
なお、上記各実施形態は、以下のように変更してもよい。また、以下の各変更例は、技術的に矛盾しない範囲において互いに組み合わせることもできる。
According to the double-pipe spacer 1, effects according to the above (1), (2), and (4) to (8) can be obtained.
(Modification)
In addition, you may change each said embodiment as follows. The following modifications can be combined with each other within a technically consistent range.
・第１実施形態において、第２の接続部５２を省略できる。
・第１実施形態において、第１の接続部５１は、内管支持部１０の外周面１３と外管支持部４０とを繋ぐ形状としてもよい。
In the first embodiment, the second connection part 52 can be omitted.
-In 1st Embodiment, the 1st connection part 51 is good also as a shape which connects the outer peripheral surface 13 of the inner pipe | tube support part 10, and the outer pipe | tube support part 40. FIG.
・第１実施形態において、連続部３２を省略してもよい。この変形例の二重管用スペーサ１は、第１の接続部５１が内管支持部１０の外周面１３または下面１５と繋がる。
・第１実施形態において、案内部３０の少なくとも一つを省略できる。同様に、第２実施形態において、案内部２３０を省略してもよい。
In the first embodiment, the continuous part 32 may be omitted. In the double pipe spacer 1 of this modification, the first connecting portion 51 is connected to the outer peripheral surface 13 or the lower surface 15 of the inner pipe support portion 10.
In the first embodiment, at least one of the guide portions 30 can be omitted. Similarly, in the second embodiment, the guide unit 230 may be omitted.
・第１実施形態において、案内部３０を１つ、２つ、または、４つ以上としてもよい。
・第１実施形態において、案内部３０は、内管支持部１０の下面１５から二重管用スペーサ１の高さ方向に延びる形状としてもよい。
In the first embodiment, the number of guide units 30 may be one, two, or four or more.
-In 1st Embodiment, the guide part 30 is good also as a shape extended in the height direction of the spacer 1 for double pipes from the lower surface 15 of the inner pipe | tube support part 10. As shown in FIG.
・第１実施形態において、案内部３０の形状を互いに異なる形状としてもよい。
・第１実施形態において、外管支持部４０の先端４１Ｂを二重管用スペーサ１の高さ方向において、突出部３１の先端３１Ｂよりも高い位置、または、突出部３１の先端３１Ｂと同じ位置に形成してもよい。
-In 1st Embodiment, it is good also considering the shape of the guide part 30 as a mutually different shape.
-In 1st Embodiment, the front-end | tip 41B of the outer tube | pipe support part 40 is the position higher than the front-end | tip 31B of the protrusion part 31 in the height direction of the spacer 1 for double pipes, or the same position as the front-end | tip 31B of the protrusion part 31. It may be formed.
・第１実施形態において、外管支持部４０の外面の４１Ａの全体の形状を外管７０の内面と接触して外管７０を支持することが可能な形状としてもよい。同様に、第２実施形態において、外管支持部２４０の外面の２４１Ａの全体の形状を外管７０の内面と接触して外管７０を支持することが可能な形状としてもよい。 -In 1st Embodiment, it is good also as a shape which can contact the inner surface of the outer tube 70, and can support the outer tube 70 for the whole shape of 41 A of the outer surface of the outer tube support part 40. FIG. Similarly, in the second embodiment, the entire shape of the outer surface 241 </ b> A of the outer tube support portion 240 may be a shape that can support the outer tube 70 by contacting the inner surface of the outer tube 70.
・第１実施形態において、外管支持部４０の外面４１Ａの形状を平坦形状とし、外面４１Ａの一部に接触部としての突起を形成してもよい。同様に、第２実施形態において、外管支持部２４０の外面２４１Ａの形状を平坦形状とし、外面２４１Ａの一部に接触部としての突起を形成してもよい。 -In 1st Embodiment, the shape of the outer surface 41A of the outer tube | pipe support part 40 may be made into a flat shape, and the protrusion as a contact part may be formed in a part of 41 A of outer surfaces. Similarly, in the second embodiment, the shape of the outer surface 241A of the outer tube support portion 240 may be a flat shape, and a protrusion as a contact portion may be formed on a part of the outer surface 241A.
・第１実施形態において、外管支持部４０の一部に弾性変形しない部分が含まれていてもよい。同様に、第２実施形態において、外管支持部２４０の一部に弾性変形しない部分が含まれていてもよい。 -In 1st Embodiment, the part which does not elastically deform may be contained in a part of outer tube | pipe support part 40. FIG. Similarly, in the second embodiment, a portion that does not elastically deform may be included in a part of the outer tube support portion 240.
・第１実施形態において、外管支持部４０を、２つまたは４つ以上としてもよい。同様に、第２実施形態において、外管支持部２４０を２つまたは４つ以上としてもよい。
・第２実施形態において、外管支持部２４０の内面と内管支持部２１０の外周面２１３とを繋ぐ第２の接続部を形成してもよい。
-In 1st Embodiment, it is good also considering the outer tube | pipe support part 40 as two or four or more. Similarly, in the second embodiment, the number of outer tube support portions 240 may be two or four or more.
-In 2nd Embodiment, you may form the 2nd connection part which connects the inner surface of the outer pipe | tube support part 240, and the outer peripheral surface 213 of the inner pipe | tube support part 210. FIG.
・第２実施形態において、外管支持部２４０の先端と内管支持部２１０の外周面２１３とを繋げ、外管支持部２４０を半円形状としてもよい。この変形例の外管支持部２４０においては、一部に脆弱部分を形成することが好ましい。脆弱部分の一例は、外管支持部２４０のうちの相対的に厚みが薄い部分、および、相対的に幅が狭い部分の少なくとも一方である。なお、この変形例の外管支持部２４０の構成を第１実施形態の外管支持部４０に採用してもよい。 -In 2nd Embodiment, the front-end | tip of the outer pipe | tube support part 240 and the outer peripheral surface 213 of the inner pipe | tube support part 210 are connected, and the outer pipe | tube support part 240 is good also as a semicircle shape. In the outer tube support portion 240 of this modification, it is preferable to form a fragile portion in part. An example of the fragile portion is at least one of a relatively thin portion and a relatively narrow portion of the outer tube support portion 240. In addition, you may employ | adopt the structure of the outer pipe | tube support part 240 of this modification for the outer pipe | tube support part 40 of 1st Embodiment.
・第１実施形態において、内管支持部１０に切り欠き１２を形成せず、内管支持部１０の内管支持面１１を連続した面としてもよい。同様に、第２実施形態において、内管支持部２１０に切り欠き２１２を形成せず、内管支持部２１０の内管支持面２１１を連続した面としてもよい。 In the first embodiment, the notch 12 is not formed in the inner tube support 10 and the inner tube support surface 11 of the inner tube support 10 may be a continuous surface. Similarly, in the second embodiment, the notch 212 is not formed in the inner tube support portion 210, and the inner tube support surface 211 of the inner tube support portion 210 may be a continuous surface.
・第１実施形態において、１つの二重管用スペーサ１の内管支持部１０に複数の内管６０を配置してもよい。同様に、第２実施形態において、１つの二重管用スペーサ１の内管支持部２１０に複数の内管６０を配置してもよい。 In the first embodiment, a plurality of inner pipes 60 may be arranged on the inner pipe support portion 10 of one double pipe spacer 1. Similarly, in the second embodiment, a plurality of inner pipes 60 may be disposed on the inner pipe support portion 210 of one double pipe spacer 1.
１…二重管用スペーサ、１０，２１０…内管支持部、１１，２１１…内管支持面、４０，２４０…外管支持部、４１Ａ，２４１Ａ…外面、４２，２４２…接触部、４３，２４３…非接触部、５０，２５０…接続部、６０…内管、７０…外管。 DESCRIPTION OF SYMBOLS 1 ... Double pipe spacer 10, 210 ... Inner pipe support part, 11, 211 ... Inner pipe support surface, 40, 240 ... Outer pipe support part, 41A, 241A ... Outer surface, 42, 242 ... Contact part, 43, 243 ... Non-contact part, 50, 250 ... Connection part, 60 ... Inner pipe, 70 ... Outer pipe.
Claims (4)
内管を支持する内管支持面が形成された円筒状の内管支持部と、
前記内管が内部に配置される外管を支持する複数の外管支持部と、
前記内管支持部と前記外管支持部とを接続する接続部とを備え、
前記接続部を支点として前記内管支持部に接近するように前記外管支持部が弾性変形できる
二重管用スペーサ。 A double pipe spacer formed of a resin material,
A cylindrical inner tube support portion formed with an inner tube support surface for supporting the inner tube;
A plurality of outer tube supports that support an outer tube in which the inner tube is disposed;
A connecting portion for connecting the inner tube support portion and the outer tube support portion;
The double pipe spacer, wherein the outer pipe support part can be elastically deformed so as to approach the inner pipe support part with the connection part as a fulcrum.
請求項１に記載の二重管用スペーサ。 An outer surface facing the outer tube in the outer tube support portion is formed around a contact portion that contacts the inner surface of the outer tube to support the outer tube, and the inner surface of the outer tube. The double tube spacer according to claim 1, comprising a non-contact portion that does not contact.
請求項２に記載の二重管用スペーサ。 The double tube spacer according to claim 2, wherein the contact portion is a curved surface protruding outward in a radial direction of the inner tube support portion.
請求項２または３に記載の二重管用スペーサ。 The double tube spacer according to claim 2, wherein the contact portion has a shape that makes point contact with an inner surface of the outer tube.
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| JP2019124275A (en) * | 2018-01-15 | 2019-07-25 | 三機工業株式会社 | Double piping structure and double piping construction method |
| CN111912257A (en) * | 2020-07-14 | 2020-11-10 | 东方电气(广州)重型机器有限公司 | Cooling sleeve and heat exchange device |
| CN113309637A (en) * | 2020-02-07 | 2021-08-27 | 中西商事株式会社 | Double tube structure, support, and method for forming double tube structure |
| JP2021156272A (en) * | 2020-03-30 | 2021-10-07 | 中西商事株式会社 | Double tube structure and support |
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| JP2019124275A (en) * | 2018-01-15 | 2019-07-25 | 三機工業株式会社 | Double piping structure and double piping construction method |
| CN113309637A (en) * | 2020-02-07 | 2021-08-27 | 中西商事株式会社 | Double tube structure, support, and method for forming double tube structure |
| JP2021124097A (en) * | 2020-02-07 | 2021-08-30 | 中西商事株式会社 | Double pipe structure, support and formation method for double pipe structure |
| JP7055826B2 (en) | 2020-02-07 | 2022-04-18 | 中西商事株式会社 | Double tube structure, support and method of forming double tube structure |
| CN113309637B (en) * | 2020-02-07 | 2023-03-03 | 中西商事株式会社 | Double tube structure, support, and method for forming double tube structure |
| JP2021156272A (en) * | 2020-03-30 | 2021-10-07 | 中西商事株式会社 | Double tube structure and support |
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| CN111912257A (en) * | 2020-07-14 | 2020-11-10 | 东方电气(广州)重型机器有限公司 | Cooling sleeve and heat exchange device |
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