WO2017135271A1 - 消火設備配管の接続構造 - Google Patents
消火設備配管の接続構造 Download PDFInfo
- Publication number
- WO2017135271A1 WO2017135271A1 PCT/JP2017/003516 JP2017003516W WO2017135271A1 WO 2017135271 A1 WO2017135271 A1 WO 2017135271A1 JP 2017003516 W JP2017003516 W JP 2017003516W WO 2017135271 A1 WO2017135271 A1 WO 2017135271A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- pipe joint
- joint
- connection structure
- fire extinguishing
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C35/00—Permanently-installed equipment
- A62C35/58—Pipe-line systems
- A62C35/68—Details, e.g. of pipes or valve 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
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/02—Hose-clips
Definitions
- the fire-extinguishing equipment pipe is connected to the sprinkler head via a flexible pipe such as a metal flexible pipe or a resin pipe by branching the main pipe leading to the water storage tank with a multi-joint joint.
- the diameter of the connection part between the flexible tube and the multi-joint joint is mainly 16A to 25A, and the connection structure is a taper screw structure for the pipe.
- the band 71 is installed in the connection part as a loosening prevention of the connection location of piping (refer FIG. 9).
- the band 71 is C-shaped, and the locking slit 72 is fitted into the locking collar 74 by elastic deformation.
- the band 71 is mistakenly fitted into the flexible pipe 75. If you do, there is a risk of mooring on the spot without dropping off.
- the band 71 does not move due to its own weight, and it is difficult for the operator or the inspector to notice it.
- an object of the present invention is to provide a fire extinguishing equipment pipe connection structure that prevents damage when an overload is applied to a piping member such as a flexible pipe or a joint.
- the second pipe joint is connected to the pipe on which the sprinkler head is installed via a connecting part, and the connection part between the pipe (flexible pipe) on which the sprinkler head is installed and the connecting part is connected to the second pipe joint. Since it is arranged inside, the connection part can be protected from external force. Further, the connecting portion can be idled in a state where the connection between the first pipe joint and the second pipe joint is completed, and when the flexible tube is bent or stretched, the connecting portion with the connecting portion is twisted or bent. When an overload is applied, the connecting portion idles with respect to the second pipe joint, so that overload due to twisting can be avoided.
- a first stage is installed in the second pipe joint, and a second stage that engages with the first stage is installed in the connecting section.
- a retaining ring that engages with an end of the second pipe joint in a state where the first stage and the second stage are in contact with each other or close to each other is provided on the outer periphery of the connecting portion.
- connection structure of the first pipe joint and the second pipe joint is connected by a screw structure.
- a C-shaped engagement provided with an engagement portion that engages a step portion installed on the outer periphery of the first pipe joint and a step portion installed on the outer periphery of the second pipe joint.
- the connection state can also be maintained by the member.
- An annular water-stopping member such as an O-ring is generally used as the water-stopping member, and the frictional resistance generated when the connecting portion is pushed into the first pipe joint to crush the water-stopping member is This is one of the factors that reduce work efficiency.
- the load on the operator is reduced by crushing the water stop member by moving the connecting portion by screwing in the screw.
- the amount of movement of the connecting portion required for crushing the water-stopping member is shortened by installing water-stopping members of different sizes, thereby shortening the screw length. .
- the connecting portion between the pipe on which the sprinkler head is installed and the connecting portion is disposed inside the second pipe joint, and the connecting portion is protected by the second pipe joint. Therefore, it is possible to realize a fire extinguishing equipment piping connection structure capable of preventing damage when an overload is applied to a piping member such as a flexible tube or a joint.
- FIG. 1 Sectional drawing of the connection structure of fire extinguishing equipment piping of 1st Embodiment.
- Sectional drawing before the connection of FIG. FIG. (A) is an external view of an indicator.
- (B) is the external view seen from the arrow A direction of (a).
- Sectional drawing of 2nd Embodiment. The perspective view of the engaging member of FIG. Sectional drawing before the connection of 3rd Embodiment.
- the external view which shows the conventional joint structure.
- FIG. 1 shows a piping configuration from a water supply piping P to a sprinkler head S of a fire extinguishing facility.
- the water supply pipe P is connected to a water source and a pump (not shown).
- the connection port at the upper end of the multi-joint 1 is connected to the water supply pipe P shown in the figure, and the flexible joint 2 and the flexible pipe 3 are connected to the plurality of connection ports 11 installed on the side surface of the multi-joint 1.
- a sprinkler head S is connected via the cable.
- the sprinkler head S is installed with its tip exposed from the ceiling plate C to the indoor side.
- the ceiling plate C is supported by the ceiling base material 5, and the sprinkler head S is also fixedly installed on the ceiling base material 5 by the metal fitting 6.
- ducts, wiring, and lighting equipment are installed around the water supply pipe P and the flexible pipe 3 and above the ceiling base material 5.
- the flexible tube 3 is stretched, but is wound in a coil shape before the sprinkler head S is fixedly installed on the ceiling base material 5.
- the flexible tube 3 is composed of a metal bellows tube or a resin tube that can be freely bent.
- the pipe joint T1 of the first embodiment is composed of a multi-joint 1 (first pipe joint) and a flexible joint 2 (second pipe joint).
- the multi-neck joint 1 is tubular, the upper connection port 10 is connected to the water supply pipe P, and two to six connection ports 11 are installed on the side of the multi-neck joint 1.
- the connection ports 11 are radially installed at four locations, and the flexible joint 2 is connected to the connection ports 11.
- a protrusion 17 is installed on the outer periphery of the multi-joint 1, and the protrusion 17 is adjacent to the annular groove 13.
- the outer diameter of the protrusion 17 is larger than the inner peripheral diameter of the ring 41 described later, and the ring 41 cannot be fitted.
- a plurality of rib-shaped protrusions 18 are installed on the outer periphery of the multi-joint 1, and the rib-shaped protrusions 18 are installed between the protrusion 17 and the protrusion 17 of the adjacent connection port 11.
- a rib-shaped protrusion 18 is provided from the connection port 11 toward the upper end side of the multi-joint 1.
- the flexible joint 2 has a tubular shape, and a male screw 21 that can be screwed into the female screw 14 is threaded at one end.
- the other end is a gripping portion 22, and the outer peripheral cross-sectional shape is hexagonal or octagonal.
- a bowl-shaped stepped portion 23 is installed between the male screw 21 and the gripping portion 22, and the end surfaces of the stepped portions 12 and 23 come into contact with the male screw 21 and the female screw 14.
- the outer diameter of the step portion 23 is equal to the outer diameter of the step portion 12. Further, the outer diameter of the stepped portion 23 is larger than the outer diameter of the male screw 21 and the gripping portion 22.
- An end surface of the step portion 23 on the side of the male screw 21 is a contact surface with the step portion 12.
- the other end side of the connecting portion 30 is a flange 36, and the flange 36 can be engaged with a step 25 formed and installed inside the flexible joint 2.
- the step 25 is formed up to the end face of the flexible joint 2 on the male screw 21 side.
- a retaining ring 37 having a shape lacking a part of the ring is provided on the outer periphery of the intermediate portion of the connecting portion 30, and the retaining ring 37 is locked to the step 25, and the distal end portion of the male screw 21 of the flexible joint 2. Is locked.
- the connecting portion 30 is prevented from coming off the flexible joint 2, and the flexible joint 2 is configured to be idle with respect to the connecting portion 30.
- the connecting portion 30 can idle with respect to the flexible joint 2. Even if the retaining ring 37 is sandwiched and fixed between the tip of the male screw 21 and the step 16 of the multi-joint 1, the connecting portion 30 can idle with respect to the retaining ring 37.
- a buffer material 38 (shown by a broken line in the figure) can be installed in the gap 35.
- the material of the buffer material 38 is rubber or soft resin, and can be easily deformed.
- the buffer material 38 has a cylindrical shape with a C-shaped cross section.
- the buffer material 38 can be inserted into the gap 35 after opening the portion of the buffer material 38 lacking the side surface and covering the outer peripheral surface of the flexible tube 3 with the inner peripheral surface of the buffer material 38.
- the outer diameter of the buffer material 38 is slightly smaller than the inner diameter of the gap 35, the buffer material 38 can be smoothly inserted into the gap 35.
- the cushioning material 38 does not become a resistance to the rotation.
- FIG. 2 shows a state in which the male screw 21 and the female screw 14 are screwed together.
- the indicator 40 can be engaged with the step portions 12 and 23.
- the indicator 40 is provided with a holding portion 42 that presses and holds the side surfaces 26 of the stepped portions 12 and 23 between two C-shaped rings 41 and 41.
- the interval between the rings 41 and 41 is formed to be substantially the same as or slightly larger than the thickness t when the opposing end surfaces of the stepped portions 12 and 23 are in contact with each other.
- the tip 43 of the ring 41 interferes with the stepped portions 12 and 23 and the rings 41, 41. Can be recognized that the screws are not sufficiently fastened.
- the indicator 40 is mounted at the position of the stepped portions 12 and 23 when the female screw 14 and the male screw 21 are in the fastened state, the tip 43 of the ring 41 is inserted into the annular groove 13 to avoid interference with the main body 1. .
- the indicator 40 is configured to be connectable only to the step portions 12 and 23, and a non-mounting portion of the indicator 40 is installed in the vicinity of the step portions 12 and 23. More specifically, when the indicator 40 is attached to the grip portion 22, the inner diameter of the ring 41 is larger than the outer diameter of the grip portion 22 adjacent to the step portion 23. Therefore, when the holding portion 42a is directed downward, the indicator 40 Cannot be attached to the grip portion 22. When the holding part 42a is turned upward, the indicator 40 may be placed on the gripping part 22 and installed. However, since the indicator 40 falls off with a slight vibration, the indicator remains stable for a long time. 40 cannot be installed in the gripping part. Similarly, when the indicator 40 is placed on the flexible pipe F, the indicator 40 falls off without being stabilized.
- the protrusion 17 installed on the outer periphery of the multi-joint 1 prevents the indicator 40 from being installed. More specifically, the protrusion 17 disposed adjacent to the annular groove 13 has an outer diameter larger than the inner diameter of the ring 41. For this reason, if it is going to attach the indicator 40 to the protrusion part 7, the front-end
- the indicator 40 can be attached only to the positions of the step portions 12 and 23 by the ring 41 and the holding portion 42 and can be attached when the step portions 12 and 23 are in contact with each other. Therefore, it can be easily determined from a remote location that the female screw 14 and the male screw 21 are in the fastened state.
- the male screw 21 and the female screw 14 are parallel screws, and when the fastening of the screw is completed, the end face of the first step portion 12 installed at the end portion of the multi-mouth joint 1 (first pipe joint); It will be in the state which the end surface of the 2nd step part 23 installed in the outer periphery of the flexible joint 2 (2nd pipe joint) contacted. Thereby, an operator can confirm easily whether the fastening state of a screw is enough visually. Also, in the stage of checking the connection state of the pipe after fastening, it can be determined whether the stepped portions 12 and 23 are in contact with each other.
- the indicator 40 which press-holds the side surface of the step parts 12 and 23 in a contact state is provided.
- the indicator 40 is fastened by the male screw 21 and the female screw 14, and can be engaged with the stepped portions 12 and 23 when the O-ring that is a water stop member is appropriately crushed.
- the indicator 40 cannot be engaged with the stepped portions 12 and 23 because the two stepped portions 12 and 23 are separated from each other.
- the indicator 40 is attached to the two step portions 12 and 23, it is possible to easily confirm that the water stop member functions and the sealed state is maintained and the screw is in the fastening state.
- the multi-joint 1 has a plurality of connection ports 11 on the side surface, when the indicator 40 is attached to one certain connection port 11 and the indicator 40 is attached to the adjacent connection port 11, The indicator 40 may interfere. As shown in FIG. 2, when the stepped portions 12 and 23 are installed at positions away from the side surfaces of the multi-joint 1, an appropriate space is secured with respect to the indicator 40 installed at the adjacent connection port 11, and the adjacent indicator 40. Interference is prevented and workability is improved.
- twisting or bending force may be applied to the flexible tube 3, but the connection to which the flexible tube 3 is connected. Since the portion 30 idles inside the flexible joint 2, it is possible to avoid overload and damage to the flexible tube 3 due to twisting. Furthermore, since the flexible joint 2 does not rotate due to the twist of the flexible tube 3, it is possible to prevent the male screw 21 and the female screw 14 from being loosened. With respect to the bending force, it is possible to prevent the flexible tube 3 from being damaged by limiting the movable range of the flexible tube 3 by the gap 35 or by installing the buffer material 38 inside the gap 35. In addition, these configurations prevent an overload from being applied to the connection portion between the connecting portion 30 and the flexible tube 3.
- a pipe joint T2 according to the second embodiment shown in FIG. 6 includes a female joint 51 (first pipe joint) and a male joint 52 (second pipe joint).
- first pipe joint first pipe joint
- second pipe joint second pipe joint
- the pipe joint T ⁇ b> 2 is configured to hold the female joint 51 and the male joint 52 by the engaging member 53.
- the engaging member 53 has a C shape in which a part of the ring is missing, and is formed by bending a metal plate.
- the distal ends 55 of the engaging member 53 are bent outward, and a base 56 protruding outward is provided at a position farthest from the distal end 55.
- a slit 57 is formed between the distal end 55 and the base portion 56, and the stepped portions 12 and 23 in contact are inserted into the slit 57 to hold the stepped portions 12 and 23 so as not to leave.
- the connecting portion 30 protruding from the male joint 52 is inserted into the female joint 52.
- the engaging member 53 is engaged with the stepped portions 12 and 23 in a state where the end surface of the stepped portion 23 of the male joint 52 is in contact with the end surface of the stepped portion 12 of the female joint 51.
- the distal ends 55 and 55 of the engaging member 54 are pressed against the side surfaces of the step portions 12 and 23, the distal ends 55 and 55 are opened in a direction away from each other with the base portion 56 as a fulcrum.
- the engaging member 53 When the engaging member 53 is further pushed in the direction of the stepped portions 12 and 23, the stepped portions 12 and 23 are fitted into the slits 57 and the tips 55 and 55 return to their original shapes due to elasticity.
- the inner peripheral surface of the engaging member 53 is disposed close to the side surfaces of the female joint 51 and the male joint 52, and the step portions 12 and 23 are sandwiched by the slits 57. Thereby, the connection state of the female joint 51 and the male joint 52 is maintained.
- the pipe joint T2 of the second embodiment is preferably used at a pipe diameter smaller than that of the pipe joint of the first embodiment or at a place where the pressure of the internal fluid is low. More specifically, the pipe diameter is 16 A or less, and it can be used at a location directly connected to a water supply facility.
- a pipe joint T3 according to the third embodiment shown in FIG. 8 includes a nipple 61 (first pipe joint) and a cap nut 62 (second pipe joint).
- first pipe joint first pipe joint
- second pipe joint second pipe joint
- symbol is attached
- the pipe joint T3 is obtained by replacing the male screw and the female screw of the pipe joint T1 of the first embodiment and configuring the first pipe joint with a nipple.
- the nipple 61 is tubular, and the right end in the figure is connected to the multi-joint 63 by a taper screw structure.
- the nipple 61 may be installed in the water supply pipe P in a state where it is connected to the multi-mouth joint 63 in advance. Since the nipple 61 and the multi-joint joint 63 are connected by a taper screw, a seal tape is wound around the screw portion, or a liquid seal is applied and then screwed together.
- the left end is threaded with a male screw 65 that can be screwed with the female screw 64 of the cap nut 62, and the inner periphery thereof is a seal surface 15.
- a gripping portion 66 having a hexagonal or octagonal outer peripheral cross-sectional shape.
- the cap nut 62 is tubular, and a female screw 64 is threaded on the inner periphery of the right end in the drawing.
- the left end is a grip portion 22 similar to that of the first embodiment.
- the connecting portion 30 having the same configuration as that of the first embodiment is installed inside the cap nut 62.
- O-rings 31 and 32 that are water-stopping members are arranged inside the female screw 64, and thereby the length of the connecting portion 30 is shortened.
- the O-rings 31 and 32 may be installed so as to protrude from the first pipe joint.
- the joint T3 may be configured by fitting a ring member 67 made of a soft material such as rubber into the gap 35.
- the buffer material 38 described in the first embodiment may be used as the ring member 67.
- T1, T2, T3 pipe fittings 1,63 Multi port joint 2 Flexible joint 3 Flexible tube 11 Connection port 12, 23 steps 13 annular groove 14, 64 female screw 15 Seal surface 21, 65 male screw 22, 66 Grip part 30 connecting part 31, 32 O-ring 35 Clearance 38 cushioning material 40 indicator 41 ring 42 (42a, 42b) holding part 51 Female fitting 52 Male Joint 53 engaging member 61 Nipple 62 Cap nut
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Mechanical Engineering (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Joints Allowing Movement (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
Description
すなわち、消火設備に設置され、管状をしており給水装置に続く給水配管に設置された第1の管継手と、管状をしており前記第1の管継手との接続構造を備えた第2の管継手と、前記第2の管継手の内部に、筒状の連結部が設置され、連結部の一端は前記第2の管継手の内部でスプリンクラーヘッドが設置された配管と接続されることを特徴とする消火設備配管の接続構造を提供する。
本発明の第1実施形態の管継手T1は、図1に示す消火設備配管に接続されている。図1には消火設備の給水配管PからスプリンクラーヘッドSまでの配管形態が図示されている。給水配管Pは図示しない水源およびポンプと接続されている。図中に示す給水配管Pには多口継手1の上端の接続口が接続しており、多口継手1の側面に設置された複数の接続口11にはフレキ継手2と可撓管3を介してスプリンクラーヘッドSが接続されている。
図6に示す第2実施形態の管継手T2は、牝継手51(第1の管継手)と牡継手52(第2の管継手)から構成される。尚、第1実施形態と構造が同じ箇所については同符号を付して説明は省略する。管継手T2は牝継手51と牡継手52を係合部材53によって保持する構成である。
図8に示す第3実施形態の管継手T3は、ニップル61(第1の管継手)と袋ナット62(第2の管継手)から構成される。尚、第1実施形態と構造が同じ箇所については同符号を付して説明は省略する。管継手T3は、第1実施形態の管継手T1の牡ネジと牝ネジを置き換え、第1の管継手をニップルにて構成したものである。
1、63 多口継手
2 フレキ継手
3 可撓管
11 接続口
12、23 段部
13 環状溝
14、64 牝ネジ
15 シール面
21、65 牡ネジ
22、66 把持部
30 連結部
31、32 Oリング
35 隙間
38 緩衝材
40 インジケーター
41 リング
42(42a、42b) 保持部
51 牝継手
52 牡継手
53 係合部材
61 ニップル
62 袋ナット
Claims (13)
- 消火設備に設置される配管であり、
管状をしており給水装置に続く給水配管に設置された第1の管継手と、
管状をしており前記第1の管継手との接続構造を備えた第2の管継手と、
第2の管継手の内部に筒状の連結部が設置され、
連結部の一端は前記第2の管継手の内部でスプリンクラーヘッドが設置された配管と接続されることを特徴とする消火設備配管の接続構造。 - スプリンクラーヘッドが設置された配管の外周と第2の管継手の内周の間には隙間が設けられている請求項1記載の消火設備配管の接続構造。
- 第1の管継手と第2の管継手の接続が完了した状態で連結部が空回り可能である請求項1または請求項2記載の消火設備配管の接続構造。
- 連結部の外周面には
止め輪が設置されており、止め輪は第2の管継手の内側に設置された段に係止する請求項1~請求項3何れか1項記載の消火設備配管の接続構造。 - 第2の管継手の内部には第1の段が設置されており、第1の段と係合する第2の段が連結部に設置され、第1の段と前記第2の段が接触または近接した状態で第2の管継手の端と係合する止め輪が連結部の外周に設置されている請求項1~請求項4何れか1項記載の消火設備配管の接続構造。
- 第1の管継手と第2の管継手はネジ構造により接続される請求項1~請求項5何れか1項記載の消火設備配管の接続構造。
- 第1の管継手の外周に設置された段部と、第2の管継手の外周に設置された段部とを係合する係合部を備えたC字型の係合部材を有する請求項1~請求項6何れか1項記載の消火設備配管の接続構造。
- 連結部の他端は第2の管継手から第1の管継手側に突出しており、第1の管継手の内部に挿通される請求項1~請求項7何れか1項記載の消火設備配管の接続構造。
- 連結部の他端には止水部材が設置されている請求項8記載の消火設備配管の接続構造。
- 第1の管継手には牝ネジが設置されており、第2の管継手には前記牝ネジと螺合可能な牡ネジが設置されている請求項1~請求項9何れか1項記載の消火設備配管の接続構造。
- 第2の管継手において、スプリンクラーヘッドが設置された配管が接続した側の端部にラバーコーティングを施した請求項1~請求項10何れか1項記載の消火設備配管の接続構造。
- 前記隙間に緩衝材を挿通させた請求項2~請求項11何れか1項記載の消火設備配管の接続構造。
- 前記スプリンクラーヘッドが接続された配管は金属製の蛇腹管または樹脂管である請求項1または請求項1~請求項12何れか1項記載の消火設備配管の接続構造。
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KR1020187017376A KR20180111778A (ko) | 2016-02-02 | 2017-02-01 | 소화설비배관의 접속구조 |
JP2017565569A JPWO2017135271A1 (ja) | 2016-02-02 | 2017-02-01 | 消火設備配管の接続構造 |
CN201780007903.4A CN108495688A (zh) | 2016-02-02 | 2017-02-01 | 灭火设备配管的连接结构 |
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PCT/JP2016/052987 WO2017134736A1 (ja) | 2016-02-02 | 2016-02-02 | 消火設備配管の接続構造及びその接続方法 |
JPPCT/JP2016/052987 | 2016-02-02 | ||
JP2016215842 | 2016-11-04 | ||
JP2016-215842 | 2016-11-04 |
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CN108426112A (zh) * | 2018-05-17 | 2018-08-21 | 海宁市晟达消防设备有限公司 | 一种用于固定消防波纹管的焊接接头 |
JP2020125822A (ja) * | 2019-02-05 | 2020-08-20 | 芝浦機械株式会社 | 緩み止め具 |
CN112870611A (zh) * | 2021-01-27 | 2021-06-01 | 浙江德运科技有限公司 | 一种消防灭火系统及其消防灭火方法 |
JP7203468B1 (ja) | 2022-05-18 | 2023-01-13 | トーフレ株式会社 | 継手構造及び配管の捻じれを吸収する配管設備 |
JP2023171191A (ja) * | 2022-05-18 | 2023-12-01 | トーフレ株式会社 | 配管の捻じれを吸収する配管構造及び方法 |
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US10591092B2 (en) * | 2017-03-07 | 2020-03-17 | Swagelok Company | Hybrid hose assembly |
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- 2017-02-01 KR KR1020187017376A patent/KR20180111778A/ko unknown
- 2017-02-01 WO PCT/JP2017/003516 patent/WO2017135271A1/ja active Application Filing
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CN112870611A (zh) * | 2021-01-27 | 2021-06-01 | 浙江德运科技有限公司 | 一种消防灭火系统及其消防灭火方法 |
JP7203468B1 (ja) | 2022-05-18 | 2023-01-13 | トーフレ株式会社 | 継手構造及び配管の捻じれを吸収する配管設備 |
JP2023170091A (ja) * | 2022-05-18 | 2023-12-01 | トーフレ株式会社 | 継手構造及び配管の捻じれを吸収する配管設備 |
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Also Published As
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CN108495688A (zh) | 2018-09-04 |
KR20180111778A (ko) | 2018-10-11 |
JPWO2017135271A1 (ja) | 2018-11-29 |
JP3225421U (ja) | 2020-03-05 |
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