WO2016133299A1 - 연료 절약형 가스용접장치 - Google Patents

연료 절약형 가스용접장치 Download PDF

Info

Publication number
WO2016133299A1
WO2016133299A1 PCT/KR2016/001085 KR2016001085W WO2016133299A1 WO 2016133299 A1 WO2016133299 A1 WO 2016133299A1 KR 2016001085 W KR2016001085 W KR 2016001085W WO 2016133299 A1 WO2016133299 A1 WO 2016133299A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
welding torch
fuel
fuel gas
welding
Prior art date
Application number
PCT/KR2016/001085
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
이창희
Original Assignee
이창희
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 이창희 filed Critical 이창희
Priority to CN201680006100.2A priority Critical patent/CN107249799B/zh
Publication of WO2016133299A1 publication Critical patent/WO2016133299A1/ko

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K5/00—Gas flame welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/006—Safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K5/00—Gas flame welding
    • B23K5/22—Auxiliary equipment, e.g. backings, guides

Definitions

  • the present invention relates to a gas welding apparatus that saves fuel (gas), and in detail, by allowing the fuel gas to be delayed to supply the oxygen gas, backflow and backfire of the gas are prevented, and fuel gas is greatly saved. Productivity is to be greatly improved.
  • oxygen welding is mainly used when welding or cutting metals or nonmetals.
  • the oxygen welding discharges a gas mixed with oxygen and acetylene or oxygen and hydrogen to a crater (welding tip) of a welding torch, and lights or discharges the mixed gas to be welded or cut.
  • the conventional welding torch is oxygen or when the fresh air introduced into the fuel tank (acetylene tank) while flowing back and back through the gas flow path through the gas flow path or oxygen that is supplied to the mixing chamber.
  • a flashback prevention device such as a check valve is attached to the fuel tank to prevent backflow and backfire of gas that may occur during welding.
  • a lighter or the like every time the ignition of the welding torch, as well as the increase in working time, there is a number of problems such as loss of fuel gas.
  • An object of the present invention is to provide a fuel-saving gas welding apparatus in which a back gas and a backfire are prevented, fuel gas is greatly saved, and productivity is improved by allowing the fuel gas to be delayed supplied from oxygen gas.
  • the fuel-saving gas welding apparatus of the present invention includes an oxygen gas supply unit for supplying oxygen gas to the welding torch 3, a fuel gas supply unit for supplying fuel gas to the welding torch 3, and a ignition for the welding torch 3.
  • the control means (2) is connected in series to both ends of the power supply (E) for the switch 12 of the contact b and the oxygen gas intermittent (On) or off (Off) depending on whether the welding torch 3 is mounted
  • a contact Ta of the first solenoid valve S1 the delay timer T connected in parallel to both ends of the first solenoid valve S1, and the delay timer T connected in series to both ends of the delay timer T.
  • a relay Ry a contact point Rya of the relay Ry connected in series across the relay Ry, and a second solenoid valve S2 for controlling fuel gas.
  • the fuel gas supply unit includes a second solenoid valve S2, a borax mixer K, a distributor U, a pressure regulator R3, and a fuel gas tank that are sequentially connected to the fuel gas supply pipe of the welding torch 3. It may include the valve V4 of (AT).
  • the digital pressure switch (D1) is a fuel gas ejection amount (supply amount, or discharge amount) is represented by a number of digits
  • the digital pressure switch D2 may be represented by a number of digits in the residual amount of fuel gas.
  • the fuel gas ejection amount (supply amount or discharge amount) data and the fuel gas residual amount data, which are numerically indicated by the digital pressure switches D1 and D2, may be transferred to a computer through an input / output interface.
  • the ignition gas supply unit is located near the welding torch 3 so as to ignite the welding torch 3, the ball valve (V1) and in turn connected to the ignition tube (11), the ignition flame 10 is generated, and the pressure regulator R1 and the valve V2 of the ignition gas tank LPG may be included.
  • the present invention further includes a cradle (4) on which the welding torch (3) is mounted, wherein the cradle (4) includes a support rod (15) having a predetermined height fixed perpendicularly to an upper surface of the support (14), and a support rod (15).
  • the connection line 19 of the switch 12 may be further included.
  • the present invention is supplied by the delay timer T of the control means 2, the fuel gas is 0.2 to 1 second delayed supply than the oxygen gas to prevent the backflow and backfire of the gas, significantly reducing the fuel gas by more than 30% And the productivity is improved by 30% or more.
  • the welding gas is automatically cut off by the on operation of the switch 12, and the welding torch 3 is lifted from the holder 4 to use the welding torch 3.
  • the welding gas is automatically supplied by the off operation of the switch 12, so it is easy to use, and since the ignition flame 10 of the ignition gas supply unit is always provided, the ignition of the welding torch 3 can be easily achieved. Productivity is improved.
  • the present invention can prevent safety accidents such as gas tank explosion due to backflow and backfire prevention in advance, thereby greatly improving safety, and having an effect that a welding worker can concentrate on welding work with confidence.
  • the present invention uses a digital pressure switch (D1) (D2), or a digital manifold gauge and the like to replace the fuel gas, for example, the amount of acetylene gas ejected (supply, discharged or used) and remaining amount (remaining amount) in real time. It has the effect of accurately predicting and alerting the timing of consumption.
  • D1 digital pressure switch
  • D2 digital manifold gauge
  • the present invention uses oxygen and acetylene as the welding gas, the welding quality is excellent, the scale does not occur, and the productivity is very useful.
  • FIG. 1 is a block diagram showing an example of the present invention.
  • FIG. 2 is a block diagram of the control means shown as an example of the present invention.
  • FIG 3 is a perspective view of a welding torch holder shown as an example of the present invention, in which a welding torch is mounted on a holder, and a switch of a contact b is turned off.
  • FIG 4 is a perspective view of a welding torch holder shown as an example of the present invention, in which a switch of the contact b is turned on by using a welding torch (not placed).
  • Oxygen gas supply unit for supplying oxygen gas to the welding torch (3); A fuel gas supply unit supplying fuel gas to the welding torch 3; Welding torch (3) the ignition gas supply unit for supplying a spark required for ignition; Control means (2) for preventing the backflow and backfire of the gas by discharging the fuel gas 0.2 to 1 second later than the oxygen gas; It includes, but the control means 2, the switch 12 of the contact point b which is connected in series to both ends of the power supply (E) and is turned on (On) / off (Off) depending on whether the welding torch (3) A first solenoid valve S1 for regulating oxygen gas; A delay timer T connected in parallel to both ends of the first solenoid valve S1; A contact Ta and a relay Ry of the delay timer T connected in series across the delay timer T; And a contact a (Rya) and a second solenoid valve (S2) for controlling fuel gas, which are connected in series with both ends of the relay (Ry).
  • FIG. 1 is a block diagram of the fuel-saving gas welding device 1 of the present invention
  • Figure 2 is a control means for preventing the back flow and backfire by delayed discharge of fuel gas (for example, acetylene gas) than oxygen gas
  • 3 and 4 are perspective views of the holder 4 on which the welding torch 3 is mounted.
  • the fuel-saving gas welding apparatus 1 of the present invention includes a welding torch 3, an oxygen gas supply unit for supplying oxygen gas to the welding torch 3, and a fuel gas (eg, a welding torch 3) as illustrated in FIG.
  • the fuel gas may include acetylene gas, LPG gas, argon gas, acetylene gas is exemplified in the present invention. While LPG gas is inexpensive, its use as a welding gas is inadequate because of its low workability and productivity, the generation of scale in the hose or tube, and the poor welding efficiency and quality. Therefore, by using acetylene gas instead of the LPG gas can be effectively used for the ignition of the welding torch 3, it is preferable in terms of cost.
  • the welding torch 3, the oxygen gas control valve 5 and its control knob, the fuel gas control valve 6 and its control knob, and combustible gas such as acetylene and oxygen are mixed with each other to form a welding gas.
  • the oxygen gas supply unit, the first solenoid valve (S1), the pressure regulator (R2) and the valve (V2) of the oxygen gas tank (OT) by using a hose to the oxygen gas supply pipe formed at the rear end of the welding torch (3) Oxygen gas is supplied to the welding torch 3 in turn by a hose, and the oxygen gas supply amount is controlled by the valve V2 and the oxygen gas control valve 5.
  • the fuel gas supply unit includes a distributor connected to the fuel gas supply pipe formed at the rear end of the welding torch 3, the second solenoid valve S2, the borax mixer K, and the digital pressure switches D1 and D2. U), the pressure regulator R3 and the valve V4 of the fuel gas tank AT are sequentially connected by a hose to supply fuel gas to the welding torch 3, and the valve V4 and the fuel gas control valve ( 6) or the fuel gas supply amount is adjusted by the valve V4, the fuel gas control valve 6, and the digital pressure switches D1 and D2.
  • the borax mixer (K) is filled with borax in the container, the borax is mixed in the fuel gas and then supplied to the welding torch (3), the ball valve (V5) (V6) is provided on both sides of the borax mixer (K) The borax is exhausted (consumed), respectively, installed and connected, so that the gas passage can be closed.
  • the present invention may further include a digital manifold gauge or digital pressure switch (D1) (D2) connected to the distributor (U), by using the ejection amount (supply amount or discharge amount of fuel gas, for example, acetylene gas, Alternatively, by measuring the amount of usage) and remaining amount (remaining amount) in real time, the replacement time (consumption time) can be monitored and alarmed, and the replacement time can be accurately predicted and alarmed.
  • D1 digital manifold gauge or digital pressure switch
  • the digital pressure switch (D1) may be displayed in a number of 7 (seven) segments or LCD of the fuel gas ejection amount, and the discharge pressure of the fuel gas can be set by using an additional switch.
  • the digital pressure switch D2 the residual amount of fuel gas is displayed on a number 7-digit (7) segment or LCD, and can be initialized by using an additional switch.
  • the display pressure may be a digital value in kg / cm 2 unit.
  • the fuel gas ejection amount data and the fuel gas residual amount data represented by the digital pressure switches D1 and D2 are transferred to an external computer and / or server through an input / output interface such as USB, RS-232, or RS-485.
  • an input / output interface such as USB, RS-232, or RS-485.
  • the ignition gas supply unit is located in the vicinity of the welding torch 3 to easily ignite the welding torch 3, the ignition tube 11 for generating the ignition flame 10, the open-type ball valve (V1) and the pressure regulator ( R1) and the valve V2 of the ignition gas tank LPG are sequentially connected by a hose to supply the ignition gas to the ignition tube 11.
  • FIG. 2 shows control means 2 for preventing backfire by allowing oxygen gas to be supplied before fuel gas, which is connected in series at both ends of the power supply E and turned on by the welding torch 3.
  • a delay timer T connected in parallel to both ends of the switch 12 and the first solenoid valve S1 for oxygen gas control, the first solenoid valve S1, and a delay connected in series between both ends of the delay timer T.
  • the delay time by the delay timer (T) is preferably 0.2 to 1 second, and if the delay time is less than 0.2 seconds, it is not preferable because backfire may occur, and the delay time exceeds 1 second. Although backfire can be prevented certainly, it is not preferable because the mixing time and discharge time of oxygen gas and fuel gas are delayed more than necessary, which reduces welding time and efficiency.
  • FIG. 3 and 4 are perspective views of the holder 4 on which the welding torch 3 is mounted, which is fixed to the welding platform 13 or a frame around the platform 13 by fastening members such as welding or bolts / nuts.
  • Mounting part 16 and the mounting rod 17 is formed in a U or V shape so that the part can be hanged, and the switch of the b contact point is installed on one side of the mounting portion 16 or the upper side of the support rod 15 ( 12) and the b contact of the switch 12 is turned on (on) or off (off) while being mounted on the upper part of the switch (12) of the contact b, and moving up or down depending on whether the welding torch 3 is mounted.
  • It consists of the operation member 18 and the connection line 19 of the b contact switch 12 connected to the control means 2.
  • the connecting line 19 is configured to be drawn out to the side of the pedestal 14 through the inside of the support bar 15, thereby protecting it from being directly exposed to the welding heat.
  • the upper end of the mounting portion 16 is formed to be bent forward portion 20 is formed so that the injector 8 and the crater 9 of the welding torch 3 can be easily inserted or separated.
  • the outer diameter of the crater 9 portion of the welding torch 3 is configured to be larger than the outer diameter of the injector 8, the outer diameter of the crater 9 is caught by the mounting rod 17.
  • the operating member 18 is supported by a spring (not shown) installed in the switch 12, and when the welding torch 3 is mounted on the teeth 4 as shown in Figure 3 by the weight of the welding torch 3 When the operation member 18 moves downward, the switch 12 of the b contact is turned off. On the contrary, when the welding member 3 is not mounted by the use of the welding torch 3, the weight of the welding torch 3 is removed. While the operating member 18 is raised by the spring action (not shown) installed in the switch 12 while the switch 12 of the b contact is turned on, the first and second solenoid valves S1 and S2 At the same time, the gas flow path is opened and the flame 9 is ignited.
  • the ignition tube 11 is positioned near the fireball 9 so that the welding torch 3 can be ignited at any time, while the LPG gas of the appropriate pressure is ejected, and the ignition spark is kept ignited.
  • LPG gas ejection amount and ignition flame intensity are set by (V2), and when the ignition flame is to be turned off, LPG gas is blocked from being ejected to the ball valve V1 connected and installed close to the operator or LPG gas
  • the valve V2 of the tank LPG may block the LPG gas from being ejected.
  • the ignition flame 10 is prepared by blowing the LPG gas at an appropriate pressure into the ignition tube 11 located near the fireball 9 so that the welding torch 3 can be ignited at any time as described above.
  • the operating member 18 of the switch 12 is raised, the b contact is turned on, and the power source E of the control means 2 is turned on. They are supplied to the first solenoid valve S1 and the delay timer T, respectively, and operate.
  • the gas passage is opened by the operation of the first solenoid valve S1 and the oxygen gas of the oxygen gas tank OT is welded torch.
  • the contact (Ta) of the delay timer (T) is on (On) 0.2 to 1 second after the first solenoid valve (S1) is operated by the delay timer (T) relay (Ry ) And the second contact solenoid valve (S2) until the a contact (Rya) of the relay (Ry) is On (On) until the gas flow path is opened Since the fuel gas of the fuel gas tank AT is supplied to the welding torch 3, backflow and backfire of the gas are prevented, and a welding gas in which oxygen gas and fuel gas are mixed with each other in the mixing chamber 7 of the welding torch 3. Is blown through the injector (8) to the crater (9), the welding gas is ignited by the ignition flame (10) around the crater 9 to weld or cut the site to be welded.
  • oxygen gas is first supplied and ejected by the operation of the first solenoid valve S1, and fuel gas is supplied while the second solenoid valve S2 is operated after a delay of about 0.2 to 1 second by the delay timer T.
  • gas backflow and backfire are prevented, and safety accidents such as gas tank explosion are prevented in advance, so safety is greatly improved, and a welding worker can concentrate on welding work with confidence, and oxygen gas Since the gas is supplied before the fuel gas, the fuel gas is greatly reduced by more than 30%, thereby reducing the welding cost.
  • the welding gas is automatically cut off by the on operation of the switch 12, and the welding torch 3 is lifted from the holder 4 to use the welding torch 3.
  • the welding gas is automatically supplied by the off operation of the switch 12, so that the welding gas is easy to use, and automatic ignition is achieved by the ignition flame 10 which is always provided by the ignition gas supply unit.
  • the present invention is excellent in workability and safe to use by preventing backflow and backfire of gas, saving fuel gas by 30% or more, and improving productivity by 30% or more.
  • the present invention can prevent a safety accident such as an explosion of a gas tank by preventing backflow and backfire, so that safety can be greatly improved, and a welding worker can concentrate on welding work with confidence.
  • the fuel-saving gas welding apparatus of the present invention has the following advantages, the backflow and backfire of the gas is prevented, the fuel gas is significantly reduced by more than 30% and the productivity is improved by more than 30% It is easy to use, and since the ignition flame 10 of the ignition gas supply unit is always provided, the ignition of the welding torch 3 can be easily achieved, so that the productivity is improved. The same safety accident can be prevented in advance, so that the safety can be greatly improved, and thus the invention is highly applicable to the industry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Arc Welding In General (AREA)
  • Feeding And Controlling Fuel (AREA)
PCT/KR2016/001085 2015-02-16 2016-02-01 연료 절약형 가스용접장치 WO2016133299A1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201680006100.2A CN107249799B (zh) 2015-02-16 2016-02-01 燃料节约型气焊装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150023090A KR101583481B1 (ko) 2015-02-16 2015-02-16 연료 절약형 가스용접장치
KR10-2015-0023090 2015-02-16

Publications (1)

Publication Number Publication Date
WO2016133299A1 true WO2016133299A1 (ko) 2016-08-25

Family

ID=55170635

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2016/001085 WO2016133299A1 (ko) 2015-02-16 2016-02-01 연료 절약형 가스용접장치

Country Status (3)

Country Link
KR (1) KR101583481B1 (zh)
CN (1) CN107249799B (zh)
WO (1) WO2016133299A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101662568B1 (ko) * 2016-02-12 2016-10-06 박봉경 공압을 이용한 산소 용접기
KR101728450B1 (ko) * 2016-06-28 2017-04-19 루츠엔지니어링 (주) 용접장치
KR101847834B1 (ko) * 2017-07-25 2018-04-11 남상구 용접 작업에서 열변형으로 인한 치수산포를 최소화하기 위한 조건 관리방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0615531A (ja) * 1992-05-01 1994-01-25 Rolls Royce Plc 超塑性成形及び拡散接合によって物品を製造する方法
JPH1043857A (ja) * 1996-07-31 1998-02-17 Koike Sanso Kogyo Co Ltd ガス加工用トーチの点火方法及び ガス加工用トーチ
KR200263305Y1 (ko) * 2001-10-27 2002-02-04 윤무일 가스 절단기의 역화 방지장치
KR100523694B1 (ko) * 2004-02-26 2005-10-25 강의창 자동점화산소절약토치
KR20130074180A (ko) * 2011-12-26 2013-07-04 현대중공업 주식회사 용접용 토치케이블의 스윙지그

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3906151A1 (de) * 1989-02-28 1990-08-30 Messer Griesheim Gmbh Verfahren zum verringern des gasverbrauches beim brennschneiden
JPH1110329A (ja) * 1997-06-26 1999-01-19 Bureizu:Kk ガス溶接装置
CN2923140Y (zh) * 2006-07-13 2007-07-18 俞雷 连铸用火焰切割机的节能装置
CN101074780A (zh) * 2007-06-08 2007-11-21 付建芳 气焊枪间断启闭控制器
KR100913137B1 (ko) 2009-02-01 2009-08-19 이명희 토치용 가스 조절 밸브
KR200457756Y1 (ko) 2010-04-05 2012-01-02 김재업 용접기용 가스절약조정기의 안전변장치
KR101042419B1 (ko) * 2010-10-13 2011-06-16 유현상 자동 개폐 기능이 구비된 가스용접장치
KR101196183B1 (ko) 2012-05-11 2012-11-01 권성수 밸브개폐가 용이한 산소절단기
CN103192042B (zh) * 2013-04-03 2015-03-18 河北煜剑节能技术有限公司 基于plc的铸坯切割控制装置、切割系统及切割方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0615531A (ja) * 1992-05-01 1994-01-25 Rolls Royce Plc 超塑性成形及び拡散接合によって物品を製造する方法
JPH1043857A (ja) * 1996-07-31 1998-02-17 Koike Sanso Kogyo Co Ltd ガス加工用トーチの点火方法及び ガス加工用トーチ
KR200263305Y1 (ko) * 2001-10-27 2002-02-04 윤무일 가스 절단기의 역화 방지장치
KR100523694B1 (ko) * 2004-02-26 2005-10-25 강의창 자동점화산소절약토치
KR20130074180A (ko) * 2011-12-26 2013-07-04 현대중공업 주식회사 용접용 토치케이블의 스윙지그

Also Published As

Publication number Publication date
KR101583481B1 (ko) 2016-01-08
CN107249799B (zh) 2019-12-24
CN107249799A (zh) 2017-10-13

Similar Documents

Publication Publication Date Title
WO2016133299A1 (ko) 연료 절약형 가스용접장치
GT200300216A (es) Sistema de control para controlar la alimentacion y quemado de un combustible pulverizado en un horno de fundicion de vidrio.
CN102261664B (zh) 新型高炉煤气放散及自动点火系统
CN114778758A (zh) 一种自动化安全化可燃气管道爆炸及阻火特性基础研究实验平台
DE60324199D1 (de) Verfahren und vorrichtung zur brandlöschung in flüssigbrennstofftanks
CN217443270U (zh) 一种模块化液化石油气扩散燃烧器试验装置
CN104464426B (zh) 一种火源及烟雾模拟训练系统
CN112916072B (zh) 一种气瓶火烧试验架
CN110701913A (zh) 一种精炼炉废钢预热加料装置
JPWO2007020727A1 (ja) 有害物質を扱う密閉作業空間における切断方法
CN205782981U (zh) 一种移动式车载气液焚烧装置
CN209857103U (zh) 一种预热烘烤设备打火点火安全节能装置
CN208408854U (zh) 氩气节流检测控制装置和系统
CN215570497U (zh) 一种氢气自动点火装置
CN203549898U (zh) 易燃气体带自动点火控制装置
CN208998117U (zh) 一种硫化氢点火装置
CN219302400U (zh) 一种煤粉制备系统保护气体的检测装置
CN215541070U (zh) 实验室用仪器台
CN210624570U (zh) 一种多功能火炬点火装置
CN201469951U (zh) 一种消防工程用灭火装置
CN215116096U (zh) 一种可自动补充可燃烧液体的气瓶火烧试验架
CN213334789U (zh) 一种智慧消防用排烟系统
CN218169007U (zh) 用于油罐拆除作业的自动顶升设备及系统
CN203938689U (zh) 一种试验用高温退火炉残氢燃烧装置
CN215787336U (zh) 一种铝电解槽槽下流铝切割装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16752629

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16752629

Country of ref document: EP

Kind code of ref document: A1