KR20000064210A - Apparatus and method of burst and fatigue test for industrial pipe and tube - Google Patents

Apparatus and method of burst and fatigue test for industrial pipe and tube Download PDF

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Publication number
KR20000064210A
KR20000064210A KR1020000050607A KR20000050607A KR20000064210A KR 20000064210 A KR20000064210 A KR 20000064210A KR 1020000050607 A KR1020000050607 A KR 1020000050607A KR 20000050607 A KR20000050607 A KR 20000050607A KR 20000064210 A KR20000064210 A KR 20000064210A
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South Korea
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pressure
air
fatigue
oil
fatigue test
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KR1020000050607A
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Korean (ko)
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김현효
김석규
최인환
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김현효
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Publication of KR20000064210A publication Critical patent/KR20000064210A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0044—Pneumatic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0048—Hydraulic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/006—Crack, flaws, fracture or rupture
    • G01N2203/0067—Fracture or rupture
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0073—Fatigue
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/0202—Control of the test

Abstract

PURPOSE: A bursting and fatigue testing method and an apparatus for an industrial pipe and pipeline are provided to extend the life of the equipment and minimize accidents. CONSTITUTION: A bursting and fatigue testing system for an industrial pipe and pipeline includes a container(11) having a wall to include testing piece(13,14) adhesive part appropriate to endure the pressure of 1500 - 60000 psi and the temperature of 10 - 200 degrees C, an inflow element adhered to the container for flowing oil and air, a storing element for supplying the inflow element with the oil and air, an element adhering an accumulator(6) as a supplementary pressing element, an element for repeatedly giving a load to a pressure pump by using a relief valve(21) and a motor, and an automatic control element using air operating valves(8,9,15,16) and a solenoid valve.

Description

산업용 파이프 와 배관의 파열 및 피로시험 방법과 장치 {Apparatus and method of burst and fatigue test for industrial pipe and tube}Apparatus and method of burst and fatigue test for industrial pipe and tube}

본 발명은 고압 장비에 많이 사용하는 산업용 배관의 파열정도와 재질의 균열 등을 파열 시험과 피로시험을 통하여 한번에 측정 가능한 시스템으로, 특히 유압과 공기로 병행 구동할 수 있는 고압 펌프와 파열시 우려되는 위험에 대비한 시편탈착부인 고압용기를 채용하는 배관의 강도를 측정하는 시스템이다.The present invention is a system that can measure the degree of rupture and material cracking of industrial pipes, which are frequently used in high pressure equipment, through rupture test and fatigue test. It is a system for measuring the strength of pipes using high pressure vessels.

일반적으로 피로시험(fatigue test)은 재료에 반복적인 하중을 가 할 때 재료가 파괴에 이르기 까지의 반복 횟수를 구하는 시험을 말하는 것으로, 재료의 피로 한도 및 소정의 반복 횟수에 견디는 시간적인 강도를 구 할 수 있는 것이다. 이와 같은 피로시험을 하는 피로 시험기는 재료의 피로 한계를 구하기 위하여 사용되는 것으로, 이는 반복 굽히기,반복 인장압축, 반복비틀기, 반복 충격등이 있는 것이다. 한편, 재료는 정하중에서 충분한 강도를 지니고 있더라도 반복 하중이나 교번하중을 받게 되면 그 하중이 작더라도 마침내 파괴를 일으키게 되고 이런한 현상을 피로라 하고, 또 시간적으로 변동하는 응력 하에서 생기는 재료의 파괴를 피로파괴(fatigue fracture)라고 한다.In general, a fatigue test is a test in which the number of repetitions until a material breaks when a repetitive load is applied to a material is obtained. The fatigue test is a method of determining the fatigue limit of a material and the time strength to withstand a predetermined number of repetitions. You can do it. Fatigue tester for this fatigue test is used to find the fatigue limit of the material, such as repeated bending, repeated tensile compression, repeated twist, repeated impact. On the other hand, even if the material has sufficient strength at static load, if it is subjected to repeated loads or alternating loads, even if the load is small, it will eventually fail, which is called fatigue. It is called fatigue fracture.

기존의 피로시험장치는 조금 복잡한 장비로 단순히 피로시험 만을 수행하고 일반적인 고무나 용접 부위의 피로 측정과 자동차 부품의 피로시험에 준하고 있으나, 본 장치는 산업현장과 고압용 화학장치 및 기타 기계류 등의 필수적으로 사용되는 전반적인 배관의 파열 과 피로를 한번에 측정하여 장비의 수명 연장과 안전사고의 극소를 더욱 증대시키는 것이다.Existing fatigue test equipment is a complicated equipment, it simply performs fatigue test and follows the fatigue test of general rubber or welded part and the fatigue test of automobile parts, but this equipment is used for industrial field, high pressure chemical device and other machinery. Essentially, the overall rupture and fatigue of the pipe used is measured at one time, further extending the life of the equipment and minimizing safety accidents.

따라서, 본 발명은 고압용 펌프, 시편탈착반응기, 유압조절밸브 만으로 단순히 산업현장에 사용하는 모든 배관의 사전 피로 및 파열을 측정함으로써 장비의 최대 수명과 안전사고를 극소화 할 수 있는 파열 및 피로시험 장치를 제공함을 목적으로 한다.Therefore, the present invention is a rupture and fatigue test device that can minimize the maximum life and safety accident of the equipment by simply measuring the pre-fatigue and burst of all the pipes used in the industrial site only by the high-pressure pump, specimen desorption reactor, hydraulic control valve It is intended to provide.

상기의 목적을 달성하기 위하여 오일과 공기를 각각 500kg/cm2이상의 압력으로 공급할 수 있는 유압식 가압 펌프와 가스 부스터(Gas Booster) 펌프와 오일을 80℃까지 이상의 온도로 예열할 수 있는 예열 오븐과 히터와 배관 파열시 위험을 방지한 고압용기 그리고 피로시험시 반복적인 하중을 가하기 위한 자동모터와 자동유압조절밸브 등으로 구성한다.In order to achieve the above object, a hydraulic pressure pump and a gas booster pump capable of supplying oil and air at a pressure of 500 kg / cm 2 or more, respectively, and a preheating oven and a heater capable of preheating the oil to a temperature above 80 ° C It consists of a high-pressure container that prevents danger in case of pipe rupture, and an automatic motor and automatic hydraulic control valve for repetitive load during fatigue test.

상기에서 고압펌프는 유압식과 공기식을 병행하게 탈부착이 용이하게 되어 있는 것으로 최고 500kg/cm2이상의 압력으로 유지하고 반복하중을 줄 수있는 펌프 전단의 모터와 유압조절밸브로 인하여 감압과 가압이 설정된 압력에서 반복하게된다. 시편 탈부착 부위를 구비한 고압용기는 1개 또는 복수개로 연결하여 각종 시편을 처리하도록하고, 고압용기 연결관에는 역류방지밸브인 체크밸브와 자동조작밸브를 연결하여 각 장치간의 높 낮이 차이나 유동 및 진동을 극복하고, 또한 압력차이에 따른 역류를 방지하도록한다. 그리고 장치에 부차된 모든 밸브은 자동조작이 가능한 에어 오퍼레이팅 밸브와 솔레노이드밸브를 사용한다.The high-pressure pump is easy to attach and detach the hydraulic and pneumatic at the same time, the pressure and pressure is set due to the motor and the hydraulic control valve in front of the pump that can maintain the pressure up to 500kg / cm 2 or more and give repeated load Will be repeated under pressure. High pressure vessels equipped with specimen detachable parts are connected to one or more plural to handle various specimens, and check valves and automatic operation valves, which are non-return valves, are connected to the high pressure vessel connecting pipes to control the difference in height or flow between the devices. To overcome the vibration, and also to prevent backflow due to the pressure difference. All valves attached to the system use solenoid valves and air operated valves.

유압식 및 공기식을 병행한 본 파열 및 피로시험기는 두 시험을 한번에 행할 수 있다는 장점과 산업용 배관에서 용접부위 배관, 그리고 자동차 부품 중 피로시험이 요구되는 사양에 이르기까지 응용분야가 매우 높은 장점을 지니고 있다.Hydraulic and pneumatic rupture and fatigue tester has the advantage of being able to perform both tests at once and the application field is very high from industrial pipe to welded pipe and specification requiring fatigue test of automobile parts. have.

도면 1은 본 발명의 구성도1 is a block diagram of the present invention

도 1은 본발명의 구성도로 유압에 쓰이는 각종 오일이 담유되는 오일조(1)와 오일을 가열하는 예열히터(2)와, 시편에 가압하는 가압펌프(3)와 시편부착부(12)를 보호하는 고압용기(11) 그리고 가압보조 어큐물레이터(Accumulator)(6)로 크게 구성하고 있다.1 is a configuration of the present invention, the oil tank 1 containing various oils used for hydraulic pressure, the preheating heater 2 for heating the oil, the pressurizing pump 3 for pressing the specimen and the specimen attachment portion 12 It consists largely of the high pressure container 11 which protects, and the pressure assist accumulator 6.

가압펌프(3)는 구동방법에 따라 오일구동방식과 공기구동방식으로 병행할 수 있게 탈 부착이 용이하게 하고, 가압펌프(3)와 고압용기(11) 사이의 연결관에는 역류방지밸브(4)와 에어 오퍼레이팅 밸브(8, 9)를 차례로 설치하여 오일과 공기가 역류없이 자동 가압 공급되도록 하며, 파열(13) 및 피로시편(14)의 선택적 측정은 에어 오퍼레이팅 밸브(8, 9)로 유압의 흐름방향을 조절하여 시험하고자하는 시편에 가압 된다. 반복하중은 가압펌프(3)로 시편(13, 14)에 압력을 채운다음 가압펌프The pressure pump (3) is easy to attach and detach so that the oil driving method and the air driving method can be performed in parallel depending on the driving method, and the backflow prevention valve (4) in the connection pipe between the pressure pump (3) and the high pressure vessel (11). ) And the air operating valves (8, 9) are installed in this order so that the oil and air are automatically pressurized and supplied without backflow, and the selective measurement of the rupture (13) and the fatigue specimen (14) is carried out by means of the air operating valves (8, 9). It is pressurized to the specimen to be tested by adjusting the flow direction. The cyclic load is applied to the specimens 13 and 14 with the pressure pump 3 and then to the pressure pump.

(3) 전단의 모터는 가압시 계속 가동되며, 가압 후 2~10초 후 릴리프밸브(21)로 자동 감압하고 다시 방향제어밸브(25)을 작동시켜 다시 가압펌프(3)로 가압한다. 측정하고자 하는 시간대에 반복을 계속 유지하면서 하중을 주게된다. 보조유압 장치로 어큐물레이터(6)를 부착하여 반복하중시 고압용기 (11)내 가압시간을 단축 시키도록 하며, 어큐물레이터(6)의 저부면에는 드레인 밸브 (7)를 설치하여 오일의 배출 및 청소를 원활히 행할 수 있게 한다. 고압반응기 후면에도 역류방지밸브(17)와 에어 오퍼레이팅 밸브(15, 16)를 차례로 설치하여 고압용기내(11) 압력을 역류없이 일정하게 유지하도록 하고, 시험 시작 전과 후 오일의 흐름정도를 눈으로 볼 수 있게 사이트 글라스 용기(19)를 부착하여 유압의 흐름을 식별 할 수 있게 하였으며, 시험중과 시험 후 고압용기(11)와 배관내에 남아있는 오일은 오일조(1)로 재순환 하게 한다.(3) The motor of the front end continues to operate when pressurized, and after 2 to 10 seconds after pressurization, the pressure is automatically reduced by the relief valve 21 and the directional control valve 25 is operated again to pressurize the pressurized pump 3 again. The load is applied while keeping the repetition at the time you want to measure. The accumulator 6 is attached to the auxiliary hydraulic device to shorten the pressurization time in the high pressure container 11 during repeated loads, and a drain valve 7 is installed at the bottom of the accumulator 6 to supply oil. Make it easy to drain and clean. Backflow prevention valve 17 and air operating valves 15 and 16 are installed in the rear of the high pressure reactor in order to maintain constant pressure in the high pressure vessel 11 without backflow, and visually check the flow of oil before and after the start of the test. The sight glass vessel (19) is attached to the system so that the hydraulic flow can be identified, and the oil remaining in the high pressure vessel (11) and the pipe during and after the test is recycled to the oil tank (1).

이상과 같이 유압 및 공기를 이용한 산업용 배관의 파열 및 피로를 시험하는 본 발명은 종래 장비와는 달리 파열시험과 피로시험을 펌프와 유압조절밸브로 인하여 한번에 수행할 수 있을 뿐만아니라 최근 고압장비의 설비가 널리 확대되면서 사전 고압장비의 검토과 함께 안전사고의 극소화 및 기타 산업용 배관에서 자동차용 부품의 파열 및 피로시험 등의 그 응용범위가 기존의 시스템보다는 효과적으로 넓게 사용할 수 있다는 것이다. 또한, 전 시스템에 사용된 장비의 부분들이 자동화가 가능한 부품들로 구성되어 모두 컴퓨터 자동제어 방식으로 프로그램화가 되어 조작된다.As described above, the present invention for testing the rupture and fatigue of the industrial pipe using hydraulic and air can not only perform the rupture test and the fatigue test at a time due to the pump and the hydraulic control valve, unlike the conventional equipment, the equipment of the high pressure equipment With the widespread use of pre-voltage equipment, the scope of applications such as minimizing safety accidents and rupture and fatigue testing of automotive parts in other industrial piping can be used more effectively than conventional systems. In addition, the parts of the equipment used in the whole system are composed of parts that can be automated, and all of them are programmed and operated by computer automatic control method.

Claims (5)

산업용 배관의 용도별, 재질별, 부위별 파열 및 피로를 시험하기 위한 유압 및 공기구동식 파열 및 피로시험기 시스템에 있어서,In the hydraulic and air-driven burst and fatigue tester system for testing the bursting and fatigue of the industrial pipes by use, material and part, (ａ) 약 100~5,000kg/cm2으로 (약 1500내지 60,000psi)범위의 압력 및 10℃내지 200℃ 범위의 온도를 견디기에 적합한 시편부착부를 포함하기 위한 벽이 있는 용기.(a) A walled container containing a specimen attachment suitable for withstanding pressures in the range of about 100 to 5,000 kg / cm 2 (about 1500 to 60,000 psi) and temperatures in the range of 10 ° C. to 200 ° C. (b) 상기 시편부착부에 오일 및 공기를 유입시키기 위한 그 용기에 부착된 유입수단.(b) Inlet means attached to the vessel for introducing oil and air to the specimen attachment section. (c) 상기 오일 및 공기를 유입 수단에 공급하기위한 저장 수단.(c) storage means for supplying the oil and air to the inlet means. (d) 상기 유입 수단 중 보조 가압 수단으로 어큐물레이터(Accumulator)를 부착한 수단.(d) means for attaching an accumulator to the auxiliary pressurization means of the inflow means. (e) 상기 유입 수단 중 릴리프밸브와 모터를 이용하여 가압펌프로 반복하중을 주는 수단.(e) means for providing a repetitive load with a pressure pump using a relief valve and a motor among the inflow means. (f) 상기 유입 수단에 에어오퍼레이팅밸브와 솔레노이드밸브를 이용하는 자동 조절 수단.(f) Automatic regulation means using an air operating valve and a solenoid valve in said inlet means. 제 1항에 있어서, 펌프는 구동되도록 모터에 연결된 것을 특징으로 하는 파열 및 피로 시험 시스템The rupture and fatigue test system of claim 1 wherein the pump is coupled to a motor to be driven. 제 1항에 있어서, 고압용기내 시편부착부를 복수개로 추가하는 것을 포함하는 파열 및 피로 시험 시스템.The rupture and fatigue test system of claim 1 comprising adding a plurality of specimen attachment portions in the high pressure vessel. 제 1항에 있어서, 반복하중을 주는 방법으로 방향제어밸브와 릴리프밸브를 이용하여 가압된 시편의 압력을 감압하고, 감압된 후 보조 가압 수단인 어큐물레이터(Accumulator)를 이용하여 다시 가압되면서, 가압펌프를 작동시켜 시험 압력까지 가압하는 시스템.The method of claim 1, wherein the pressure of the pressurized test piece is reduced by using a directional control valve and a relief valve by applying a repetitive load, and then pressurized again by using an accumulator, which is an auxiliary pressurizing means, after the pressure is reduced. A system for pressurizing the test pressure by operating a pressure pump. 제 1항에 있어서, 가압용기 후단에 사이트글라스로 유압의 흐름을 직접 식별가능하게 하는 수단.A means according to claim 1, wherein the flow of hydraulic pressure directly into the sight glass at the rear end of the pressure vessel is identifiable.
KR1020000050607A 2000-08-30 2000-08-30 Apparatus and method of burst and fatigue test for industrial pipe and tube KR20000064210A (en)

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KR100478854B1 (en) * 2002-04-25 2005-03-24 한국항공우주산업 주식회사 Apparatus to test pressure for a tube
KR100697222B1 (en) * 2005-09-02 2007-03-22 한국건설기술연구원 Apparatus and method for testing rockbolt
KR100888856B1 (en) * 2007-04-24 2009-03-17 한양대학교 산학협력단 Pressure-vibration test apparatus for pipe
CN108195691A (en) * 2017-12-20 2018-06-22 广东核电合营有限公司 A kind of cladding tubes internal pressure explosion bulge test device
KR101887822B1 (en) * 2017-08-29 2018-09-06 (주)대흥유압 Hydraulic Test Device using Oil-Hydraulic Proportional Control and The Test Method
CN108717016A (en) * 2018-06-28 2018-10-30 四川杰特机器有限公司 A kind of sebific duct fatigue Auto-Test System for capableing of automatic shield failure sebific duct

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JPS58135436A (en) * 1982-02-05 1983-08-12 Toko Tesutatsuku:Kk Circulating loop of high-temperature and high-pressure heat fatigue tester
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JPS6488334A (en) * 1987-09-30 1989-04-03 Hitachi Ltd Method and device for testing actual machine artificial piping
JPH01165931A (en) * 1987-12-23 1989-06-29 Nippon Steel Corp Fatigue tester

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JPS58135436A (en) * 1982-02-05 1983-08-12 Toko Tesutatsuku:Kk Circulating loop of high-temperature and high-pressure heat fatigue tester
JPS61156315A (en) * 1984-12-27 1986-07-16 Shimadzu Corp Pressure controller
JPS62108131A (en) * 1985-11-07 1987-05-19 Shimadzu Corp Material testing machine
JPS6488334A (en) * 1987-09-30 1989-04-03 Hitachi Ltd Method and device for testing actual machine artificial piping
JPH01165931A (en) * 1987-12-23 1989-06-29 Nippon Steel Corp Fatigue tester

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100478854B1 (en) * 2002-04-25 2005-03-24 한국항공우주산업 주식회사 Apparatus to test pressure for a tube
KR100697222B1 (en) * 2005-09-02 2007-03-22 한국건설기술연구원 Apparatus and method for testing rockbolt
KR100888856B1 (en) * 2007-04-24 2009-03-17 한양대학교 산학협력단 Pressure-vibration test apparatus for pipe
KR101887822B1 (en) * 2017-08-29 2018-09-06 (주)대흥유압 Hydraulic Test Device using Oil-Hydraulic Proportional Control and The Test Method
CN108195691A (en) * 2017-12-20 2018-06-22 广东核电合营有限公司 A kind of cladding tubes internal pressure explosion bulge test device
CN108195691B (en) * 2017-12-20 2024-03-22 广东核电合营有限公司 Internal pressure explosion test device for cladding tube
CN108717016A (en) * 2018-06-28 2018-10-30 四川杰特机器有限公司 A kind of sebific duct fatigue Auto-Test System for capableing of automatic shield failure sebific duct

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