JP2005147690A - High pressure cycle testing device - Google Patents
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- JP2005147690A JP2005147690A JP2003380959A JP2003380959A JP2005147690A JP 2005147690 A JP2005147690 A JP 2005147690A JP 2003380959 A JP2003380959 A JP 2003380959A JP 2003380959 A JP2003380959 A JP 2003380959A JP 2005147690 A JP2005147690 A JP 2005147690A
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Abstract
Description
この発明は、高圧サイクル試験装置に関し、特に、管、弁などの供試体に所要のサイクル負荷を与えて耐久性を試験する高圧サイクル試験装置に関する。 The present invention relates to a high-pressure cycle test apparatus, and more particularly to a high-pressure cycle test apparatus that applies a required cycle load to a specimen such as a pipe or a valve to test durability.
従来、高圧ガス等における材料、機器等のサイクル試験では、図３に示すように、圧縮機(52)、蓄圧容器(53)、第１制御弁(54)、第２制御弁(55)およびセンサ(56)を備えた試験装置(51)を製作し、外部の圧縮機(52)、蓄圧容器(53)、制御弁(54)等を介して供試体(S)に高圧ガスを送り込むことにより、サイクル負荷を与えるというのが一般的であった。 Conventionally, in a cycle test of materials and equipment in high-pressure gas and the like, as shown in FIG. 3, a compressor (52), an accumulator (53), a first control valve (54), a second control valve (55) and Produce a test device (51) equipped with a sensor (56), and send high-pressure gas to the specimen (S) via an external compressor (52), accumulator vessel (53), control valve (54), etc. In general, a cycle load is applied.
図３に一例を示した従来の高圧サイクル試験装置では、高圧化が進むことにより、高圧サイクル試験装置のための設備コストが膨大になり、使用されるガスの排出量が多く、ランニングコストが高くつき、しかも、ガスの回収ための負担も大きくなる。また、高圧導入に伴う断熱圧縮による温度膨張を避けるためには、ゆっくりとしたガス導入が必要となるため、試験時間が長くかかるという問題もあった。 In the conventional high-pressure cycle test apparatus shown in FIG. 3, as the pressure increases, the equipment cost for the high-pressure cycle test apparatus becomes enormous, the amount of gas used is large, and the running cost is high. In addition, the burden for gas recovery also increases. In addition, in order to avoid temperature expansion due to adiabatic compression accompanying high pressure introduction, it is necessary to introduce gas slowly, so that there is a problem that it takes a long test time.
この発明の目的は、設備コストが抑えることができ、しかも、試験時間を短くすることができる高圧サイクル試験装置を提供することにある。 It is an object of the present invention to provide a high-pressure cycle test apparatus that can reduce the equipment cost and shorten the test time.
この発明による高圧サイクル試験装置は、外部に通じるガス通路を有しかつ一端開口および他端開口を有する供試体を内部に支持する供試体支持手段と、一端に供試体支持手段のガス通路に通じる開口を有する円筒状シリンダと、シリンダに摺接するパッキン部を有しシリンダ長さ方向に移動可能なピストンと、ピストンを移動させる駆動手段と、シリンダ内にガスを供給するガス供給手段とを備えていることを特徴とするものである。 The high-pressure cycle test apparatus according to the present invention has a gas passage leading to the outside and a specimen support means for internally supporting a specimen having an opening at one end and an opening at the other end, and a gas passage of the specimen support means at one end. A cylindrical cylinder having an opening; a piston having a packing portion that is in sliding contact with the cylinder; movable in the cylinder length direction; drive means for moving the piston; and gas supply means for supplying gas into the cylinder. It is characterized by being.
供試体は、通常、流体制御装置を構成する管、弁などの配管用機器とされ、新材料、新構造の耐久性などが評価される。 The specimen is usually a piping device such as a pipe and a valve constituting the fluid control apparatus, and the durability of the new material and the new structure is evaluated.
ピストンを移動させる駆動手段としては、例えば、油圧サーボモータが使用され、ピストンは、油圧によって所定サイクルで往復運動させられる。ガス供給手段は、ピストンを移動させる前の初期圧力を設定するためのガスを供給するもので、シリンダ内は、まず、このガス供給手段によって一定圧力とされ、ピストンが前進することによって昇圧され、ピストンが所定位置に停止させられることによって一定の高圧力が保持され、ピストンが後退することによって降圧され、これにより、供試体に所要のサイクル負荷が与えられる。 As the driving means for moving the piston, for example, a hydraulic servo motor is used, and the piston is reciprocated in a predetermined cycle by hydraulic pressure. The gas supply means supplies gas for setting an initial pressure before moving the piston. The cylinder is first set to a constant pressure by the gas supply means, and the pressure is increased by the advance of the piston. When the piston is stopped at a predetermined position, a constant high pressure is maintained, and when the piston is retracted, the pressure is lowered, thereby applying a required cycle load to the specimen.
供試体支持手段は、例えば、供試体の一端開口が押し当てられる保持面を有する固定保持部と、供試体の他端開口に押し付けられる保持面を有し移動可能な可動保持部とを有し、ガス通路は、供試体の試験空間に通じるように、固定保持部に貫通状に設けられているものとされる。このようにすると、供試体を固定保持部に保持させてから可動保持部をセットすることにより、供試体を流体密に保持することができるので、試験のための準備作業を容易に行うことができる。固定保持部および可動保持部の形状は、供試体の形状に応じて変更される。また、供試体支持手段は、固定保持部と可動保持部との間に着脱可能に渡し止められた筒状カバー部をさらに有していることが好ましく、これにより、供試体が保護されるとともに、供試体とカバーとの間に圧力を掛けることが可能となる。 The specimen support means includes, for example, a fixed holding part having a holding surface against which one end opening of the specimen is pressed, and a movable holding part having a holding surface pressed against the other end opening of the specimen and movable. The gas passage is provided in a penetrating manner in the fixed holding portion so as to communicate with the test space of the specimen. In this way, the specimen can be held fluid-tight by setting the movable holder after the specimen is held by the fixed holder, so that preparation work for the test can be easily performed. it can. The shapes of the fixed holding portion and the movable holding portion are changed according to the shape of the specimen. Further, the specimen support means preferably further has a cylindrical cover part that is detachably secured between the fixed holding part and the movable holding part, thereby protecting the specimen. It is possible to apply pressure between the specimen and the cover.
ガス供給手段は、ガス源に通じるガス導入管と、これの途中に設けられた開閉弁および逆止弁とからなることが好ましい。このようにすると、試験中にリークにより失われたガスが逆止弁を介して補充され、試験条件が一定に保たれる。 The gas supply means preferably comprises a gas introduction pipe that leads to a gas source, and an on-off valve and a check valve provided in the middle of the gas introduction pipe. If it does in this way, the gas lost by the leak during a test will be replenished via a check valve, and test conditions will be kept constant.
供試体支持手段は、管の内部に高圧サイクル負荷を与えるのに好適なように、例えば、固定保持部および可動保持部の各保持面には、供試体の開口と同心となる円柱状の凹所および短円筒状の突出部が設けられており、凹所には、供試体の開口内に密に嵌め入れられる円柱状の内側シールが密に嵌め入れられ、突出部には、供試体の開口外周縁部に密に嵌め入れられる円筒状の外側シールが密に嵌め入れられており、固定保持部の内側シールに、固定保持部のガス通路と供試体の試験空間とを連通する連通路が貫通状に設けられているものとされる。 The specimen support means is, for example, a cylindrical concave concentric with the opening of the specimen on each holding surface of the fixed holding section and the movable holding section so as to be suitable for giving a high-pressure cycle load to the inside of the tube. And a short cylindrical protrusion, a cylindrical inner seal that is closely fitted in the opening of the specimen is closely fitted in the recess, and a protrusion of the specimen is fitted in the protrusion. A cylindrical outer seal that is closely fitted to the outer peripheral edge of the opening is closely fitted, and a communication passage that connects the gas passage of the fixed holding portion and the test space of the specimen to the inner seal of the fixed holding portion. Is provided in a penetrating manner.
この発明の高圧サイクル試験装置によると、供試体支持手段とシリンダとを直結することにより、必要最小限の供試体支持手段およびシリンダに高圧を発生させ、シリンダ内に封入されたガスがピストンの往復によりサイクル負荷を発生するので、高圧設備による危険性が少なくなり、ガスの排出がなく、ランニングコストが減少する。また、圧縮機や蓄圧容器に代えて、油圧サーボモータおよびシリンダとすることにより、コンパクトな設備とすることができ、低コストでの製作が可能となる。しかも、自由な圧力創出が可能であり、断熱圧縮などによる温度上昇がないため、昇圧のための時間を短くすることができ、これにより、サイクル時間を短くすることができ、安定した試験が可能となる。 According to the high-pressure cycle test apparatus of the present invention, by directly connecting the specimen support means and the cylinder, a high pressure is generated in the minimum necessary specimen support means and the cylinder, and the gas sealed in the cylinder is reciprocated by the piston. Since a cycle load is generated, the risk of high-pressure equipment is reduced, gas is not discharged, and running costs are reduced. Further, by using a hydraulic servo motor and a cylinder instead of the compressor and the pressure accumulating vessel, a compact facility can be obtained, and manufacturing at low cost is possible. In addition, free pressure creation is possible and there is no temperature rise due to adiabatic compression, etc., so the time for boosting can be shortened, thereby shortening the cycle time and enabling stable testing It becomes.
この発明の実施の形態を、以下図面を参照して説明する。以下の説明において、図の左を前、右を後というものとする。 Embodiments of the present invention will be described below with reference to the drawings. In the following description, the left side of the figure is the front and the right side is the back.
図１および図２は、この発明の高圧サイクル試験装置を管などの筒状の供試体の試験に適用する際の１実施形態を示している。 1 and 2 show an embodiment when the high-pressure cycle test apparatus of the present invention is applied to a test of a cylindrical specimen such as a tube.
高圧サイクル試験装置(1)は、外部に通じるガス通路(14)を有しかつ前端開口および後端開口を有する供試体(S)を内部に支持する供試体支持手段(2)と、前端に供試体支持手段(2)のガス通路(14)の後端開口に通じる開口を有し後端が閉鎖された円筒状シリンダ(3)と、シリンダ(3)に摺接するパッキン部(5)を有し前後（シリンダ長さ方向）に移動可能なピストン(4)と、ピストン(4)を移動させる駆動手段としてのサーボモータ(6)と、シリンダ(3)内前部にガスを供給するガス供給手段(7)と、供試体支持手段(2)のガス通路(14)内の圧力を検出するセンサ手段(8)とを備えている。 The high-pressure cycle testing apparatus (1) includes a specimen support means (2) having a gas passage (14) communicating with the outside and supporting a specimen (S) having a front end opening and a rear end opening inside, and a front end. A cylindrical cylinder (3) having an opening communicating with the rear end opening of the gas passage (14) of the specimen support means (2) and closed at the rear end, and a packing portion (5) in sliding contact with the cylinder (3) It has a piston (4) that can move back and forth (cylinder length direction), a servo motor (6) as a driving means for moving the piston (4), and a gas that supplies gas to the front part of the cylinder (3) Supply means (7) and sensor means (8) for detecting the pressure in the gas passage (14) of the specimen support means (2) are provided.
供試体支持手段(2)は、供試体(S)の後端開口が押し当てられる保持面を有し床に固定されている直方体ブロック状の固定保持部(11)と、供試体(S)の前端開口に押し付けられる保持面を有し移動可能な直方体ブロック状の可動保持部(12)と、固定保持部(11)と可動保持部(12)との間に着脱可能に渡し止められた筒状カバー部(13)とからなる。ガス通路(14)は、筒状の供試体(S)の試験空間である内部空間に通じるように、固定保持部(11)に貫通状に設けられている。 The specimen support means (2) includes a rectangular parallelepiped block-shaped fixing holder (11) having a holding surface against which the rear end opening of the specimen (S) is pressed, and the specimen (S). The movable holding part (12) having a rectangular parallelepiped block shape that has a holding surface pressed against the front end opening of the movable body, and is detachably passed between the fixed holding part (11) and the movable holding part (12). It consists of a cylindrical cover part (13). The gas passage (14) is provided in a penetrating manner in the fixed holding portion (11) so as to communicate with an internal space that is a test space of the cylindrical specimen (S).
サーボモータ(6)は、油圧によってピストン(4)を所定サイクルで往復運動させるもので、圧力波形として、三角波、台形波、パルス波等が可能であり、１サイクルの時間も種々のものが設定可能とされている。 The servo motor (6) reciprocates the piston (4) in a predetermined cycle by hydraulic pressure, and it can be a triangular wave, trapezoidal wave, pulse wave, etc. as a pressure waveform, and various times can be set for one cycle. It is possible.
ガス供給手段(7)は、シリンダ(3)内前部空間にガスの初期充填を行いかつリークで失われたガスの自動補充を行うもので、ガス源に通じるガス導入管(27)と、これの途中に設けられた開閉弁(28)および逆止弁(29)とからなる。 The gas supply means (7) performs initial filling of the gas in the front space in the cylinder (3) and automatically replenishes the gas lost due to leakage, and includes a gas introduction pipe (27) leading to a gas source, It consists of an on-off valve (28) and a check valve (29) provided in the middle of this.
図２に詳しく示すように、固定保持部(11)の保持面には、供試体(S)の後端開口と同心となる円柱状の凹所(15)および凹所(15)よりも大径の短円筒状の突出部(16)が設けられている。凹所(15)には、前部が供試体(S)の内径に密に嵌め入れられる円柱状の内側シール(17)の後部が密に嵌め入れられている。突出部(16)には、前部が供試体(S)の外径に密に嵌め入れられる円筒状の外側シール(18)の後部が密に嵌め入れられている。内側シール(17)には、固定保持部(11)のガス通路(14)と供試体(S)の内部空間とを連通する連通路(17a)が貫通状に設けられている。同様に、可動保持部(12)の保持面には、供試体(S)の前端開口と同心となる円柱状の凹所(19)および凹所(19)よりも大径の短円筒状の突出部(20)が設けられている。凹所(19)には、後部が供試体(S)の内径に密に嵌め入れられる円柱状の内側シール(21)の前部が密に嵌め入れられている。突出部(20)には、後部が供試体(S)の外径に密に嵌め入れられる円筒状の外側シール(21)の前部が密に嵌め入れられている。内側シール(21)は、固定保持部(11)の保持面側に設けられる内側シール(17)と同じ形状とされており、貫通状の連通路(21a)が形成されている。 As shown in detail in FIG. 2, the holding surface of the fixed holding portion (11) is larger than the cylindrical recess (15) and the recess (15) concentric with the rear end opening of the specimen (S). A short cylindrical protrusion (16) having a diameter is provided. In the recess (15), the rear part of the cylindrical inner seal (17) whose front part is closely fitted into the inner diameter of the specimen (S) is closely fitted. The rear part of the cylindrical outer seal (18) whose front part is closely fitted into the outer diameter of the specimen (S) is closely fitted into the protrusion (16). The inner seal (17) is provided with a communication passage (17a) penetrating the gas passage (14) of the fixed holding portion (11) and the internal space of the specimen (S). Similarly, the holding surface of the movable holding portion (12) has a cylindrical recess (19) concentric with the front end opening of the specimen (S) and a short cylindrical shape having a larger diameter than the recess (19). A protrusion (20) is provided. In the recess (19), the front part of the cylindrical inner seal (21) whose rear part is closely fitted into the inner diameter of the specimen (S) is closely fitted. A front part of a cylindrical outer seal (21) whose rear part is closely fitted into the outer diameter of the specimen (S) is closely fitted into the projecting part (20). The inner seal (21) has the same shape as the inner seal (17) provided on the holding surface side of the fixed holding portion (11), and a penetrating communication path (21a) is formed.
シリンダ(3)の後端は、閉鎖ブロック(23)により閉鎖されており、ピストン(4)の中間部分は、閉鎖ブロック(23)に設けられた貫通孔(23a)に前後移動可能に挿通されている。閉鎖ブロック(23)には、ピストン(4)と貫通孔(23a)縁部との間をシールするシール(24)が設けられている。シリンダ(3)の前端は、溶接などにより固定保持部(11)に流体密に固定されている。 The rear end of the cylinder (3) is closed by a closing block (23), and the intermediate part of the piston (4) is inserted through a through hole (23a) provided in the closing block (23) so as to be movable back and forth. ing. The closing block (23) is provided with a seal (24) for sealing between the piston (4) and the edge of the through hole (23a). The front end of the cylinder (3) is fluid-tightly fixed to the fixed holding portion (11) by welding or the like.
パッキン部(5)は、ピストン前端の小径部に順次嵌め被せられた複数組のシールリング(25)と、シールリング(25)の抜けを防止する固定リング(26)とからなる。 The packing portion (5) includes a plurality of sets of seal rings (25) sequentially fitted on the small diameter portion at the front end of the piston, and a fixing ring (26) that prevents the seal ring (25) from coming off.
上記高圧サイクル試験装置(1)によると、シリンダ(3)内は、まず、ガス供給手段(7)によって一定圧力とされる。次いで、ピストン(4)が前進することによって昇圧され、ピストン(4)が所定位置に停止させられることによって一定の高圧力が保持され、ピストン(4)が後退することによって降圧され、これにより、供試体(S)に所要のサイクル負荷が与えられる。試験中にリークにより失われたガスは、逆止弁(29)を介して補充され、試験条件は試験期間中一定に保たれる。 According to the high-pressure cycle test apparatus (1), the cylinder (3) is first brought to a constant pressure by the gas supply means (7). Then, the pressure is increased by moving the piston (4) forward, the piston (4) is stopped at a predetermined position, a constant high pressure is maintained, and the pressure is decreased by moving the piston (4) backward. The required cycle load is applied to the specimen (S). Gas lost due to leakage during the test is replenished via the check valve (29) and the test conditions are kept constant throughout the test.
なお、上記実施形態では、供試体としての管(S)の内部に負荷を与える例を説明したが、固定保持部(11)および可動保持部(12)の形状を若干変更することにより、管(S)の外部に負荷を与えることも可能である。この場合、カバー部(13)は、供試体(S)とカバー部(13)との間に圧力を掛けるための容器とされる。また、固定保持部および可動保持部の形状を変更することにより、供試体を弁などの流体制御機器とすることもできる。 In the above embodiment, an example in which a load is applied to the inside of the tube (S) as a specimen has been described, but by slightly changing the shapes of the fixed holding portion (11) and the movable holding portion (12), the tube It is also possible to apply a load outside (S). In this case, the cover part (13) is a container for applying pressure between the specimen (S) and the cover part (13). Further, the specimen can be a fluid control device such as a valve by changing the shapes of the fixed holding portion and the movable holding portion.
(1) 高圧サイクル試験装置
(2) 供試体支持手段
(3) シリンダ
(4) ピストン
(5) パッキン部
(6) サーボモータ（駆動手段）
(7) ガス供給手段
(11) 固定保持部
(12) 可動保持部
(14) ガス通路
(15) 凹所
(16) 突出部
(17) 内側シール
(17a) 連通路
(18) 外側シール
(27) ガス導入管
(28) 開閉弁
(29) 逆止弁
(S) 供試体
(1) High pressure cycle test equipment
(2) Specimen support means
(3) Cylinder
(4) Piston
(5) Packing part
(6) Servo motor (drive means)
(7) Gas supply means
(11) Fixed holding part
(12) Movable holding part
(14) Gas passage
(15) Recess
(16) Projection
(17) Inner seal
(17a) Communication passage
(18) Outer seal
(27) Gas introduction pipe
(28) On-off valve
(29) Check valve
(S) Specimen
Claims (4)
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| JP2003380959A JP4277654B2 (en) | 2003-11-11 | 2003-11-11 | High pressure cycle test equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2003380959A JP4277654B2 (en) | 2003-11-11 | 2003-11-11 | High pressure cycle test equipment |
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| JP2005147690A true JP2005147690A (en) | 2005-06-09 |
| JP4277654B2 JP4277654B2 (en) | 2009-06-10 |
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| CN114486092A (en) * | 2022-01-03 | 2022-05-13 | 浙江大学 | Test device for testing performance of non-metal sealing element in high-pressure hydrogen environment |
| CN114486092B (en) * | 2022-01-03 | 2022-11-08 | 浙江大学 | Test device for testing performance of non-metal sealing element in high-pressure hydrogen environment |
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