KR19980014224U - Water Jet Loom Check Valve - Google Patents

Water Jet Loom Check Valve Download PDF

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Publication number
KR19980014224U
KR19980014224U KR2019970020540U KR19970020540U KR19980014224U KR 19980014224 U KR19980014224 U KR 19980014224U KR 2019970020540 U KR2019970020540 U KR 2019970020540U KR 19970020540 U KR19970020540 U KR 19970020540U KR 19980014224 U KR19980014224 U KR 19980014224U
Authority
KR
South Korea
Prior art keywords
check valve
opening
water jet
jet loom
cover
Prior art date
Application number
KR2019970020540U
Other languages
Korean (ko)
Inventor
백경태
Original Assignee
백경태
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 백경태 filed Critical 백경태
Priority to KR2019970020540U priority Critical patent/KR19980014224U/en
Publication of KR19980014224U publication Critical patent/KR19980014224U/en
Priority to TW087112057A priority patent/TW428059B/en
Priority to JP10210735A priority patent/JP3002979B2/en

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/32—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by liquid jet
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/24—Mechanisms for inserting shuttle in shed
    • D03D49/50—Miscellaneous devices or arrangements concerning insertion of weft and not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/04—Auxiliary apparatus combined with or associated with looms for treating weft
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K21/00—Fluid-delivery valves, e.g. self-closing valves
    • F16K21/04—Self-closing valves, i.e. closing automatically after operation
    • F16K21/06—Self-closing valves, i.e. closing automatically after operation in which the closing movement, either retarded or not, starts immediately after opening
    • F16K21/12—Self-closing valves, i.e. closing automatically after operation in which the closing movement, either retarded or not, starts immediately after opening with hydraulically-operated opening means; with arrangements for pressure relief before opening

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Looms (AREA)
  • Check Valves (AREA)

Abstract

본 고안은 워터젯트 직기용 체크밸브의 개량에 관한 것으로서, 특히 체크밸브의 개폐작동이 신속하면서 정확하게 이루어지도록 함과 동시에 보다 긴 수명을 유지할 수 있도록 한 것이다.The present invention relates to an improvement of a check valve for a waterjet loom, and in particular, to open and close the check valve quickly and accurately, and to maintain a longer service life.

즉, 금속본체(4)의 상하 단부 내면에 통공(12)이 뚫린 상부덮개(6)와 지지관체(18)가 돌출 구성된 하부덮개(8)를 결합하되, 상기 지지관체(18) 상에는 저면에 나선부(19)가 형성된 안내공(16)을 뚫어 구성하고, 개폐변(22)의 원형봉체(24)가 끼워져 수직승강 안내되게 하고, 개폐변(22) 저면에는 저항원판(25)이 일체로 결합하여서 된 것이다.That is, the upper cover 6 and the lower cover 8 formed by protruding the support tube 18 are formed on the inner surface of the upper and lower ends of the metal body 4, and the support tube 18 is provided on the bottom surface. The guide hole 16 formed with the spiral portion 19 is formed, and the circular rod 24 of the opening / closing edge 22 is fitted to vertically guide the lifting, and the resistance disc 25 is integrated on the bottom of the opening / closing edge 22. To be combined.

Description

워터제트 직기용 체크밸브Water Jet Loom Check Valve

제 1 도 : 본 고안 체크밸브의 단면 구성도.(개폐변이 밀폐된 상태도)1 is a cross-sectional view of the check valve of the present invention.

제 2 도 : 본 고안 체크밸브의 단면 구성도.(개폐변이 개방된 상태도)2 is a cross-sectional view of the check valve of the present invention.

제 3 도 : 본 고안 체크밸브를 분해한 상태의 단면 구성도.3 is a cross-sectional view of the present check valve in a disassembled state.

제 4 도 : 본 고안 체크밸브의 사용상태도.4 is a state diagram of use of the check valve of the present invention.

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

(2)--체크밸브(4)--본체(2)-check valve (4)-body

(6)--상부덮개(8)--하부덮개(6)-Top Cover (8)-Bottom Cover

(10)--작동실(12)--통공(10)-Operating Room (12)-Vehicle

(14)--완곡 경사면(16)--안내공(14)-Flexural Slope (16)-Guide

(18)--지지관체(19)--나선부(18)-support body (19)-spiral

(20)--스프링(22)--개폐변(20)-spring (22)-opening and closing

(24)--원형봉체(25)--저항원판(24)-round rod (25)-resistance disc

(26)--밀착편(27)--통공(26)-Contact (27)-Public

(29)--수지편(29)-Resin

본 고안은 워터제트 직기(Water Jet Loom)용 체크밸브의 개량에 관한 것으로서, 특히 유체의 흐름을 이용하여 개폐변의 개폐작동이 보다 신속용이하게 이루어지도록 하면서 개폐변의 마모가 최소화 되도록 한 것이다.The present invention relates to an improvement of a check valve for a water jet loom, and in particular, to minimize the wear of the opening and closing valve while making the opening and closing operation of the opening and closing valve faster by using a fluid flow.

워터젯트 직기용 체크밸브에 대하여는 본인이 실용신안등록 출원 제97-4888호 워터젯트 직기용 체크밸브로 선출원한 것이 있다.Regarding the water jet loom check valve, the applicant has filed an application as a utility model registration application No. 97-4888 for a water jet loom check valve.

즉, 작동실이 형성된 본체와 통공이 뚫린 덮개가 결합된 통상의 체크밸브에 있어서, 본체에 구성된 작동실에 반구형 밀착편과 원형 봉체로 구성된 개폐변을 스프링으로 탄력 설치되게 함으로써 개폐변의 반구형 밀착편이 덮개의 통공에 적극적으로 밀착되게 하여서 된 것이다.That is, in a conventional check valve in which a main body having an operating chamber and a cover having a hole formed therein is combined, the hemispherical close contact piece of the opening / closing side is formed by elastically installing the opening / closing side consisting of a semi-spherical contact piece and a circular rod in the operating chamber configured in the main body with a spring. It was made to be in close contact with the through hole of the cover.

따라서 상기한 구성의 체크밸브는 개폐변이 스프링의 탄발력에의해 덮개의 통공을 적극적으로 개폐케 하므로서 개폐작동이 확실하게 이루어지게 되므로 힘없는 유체 즉, 기준 압력이하의 유체는 차단되어 유체손실을 방지할 수 있게 될 뿐 아니라, 고속 작동이 가능케 되는 등의 효가 있는 것이 었으나 개폐변이 스프링상에 단순히 얹혀 있는 상태이므로 개폐작동시 개폐변의 요동으로 반구형 밀착편이 덮개의 통공과 정확히 접하여 작동되기가 곤란하며, 또한 개폐변이 열림시 충격으로 인하여 마모가 심하여, 금속으로 된 본체의 가공에도 많은 어려움이 따르게 되는 등의 단점이 있는 것이었다.Therefore, the check valve of the above-described configuration actively opens and closes the opening of the cover by the spring force of the opening / closing valve, so that the opening and closing operation is performed reliably, so that the fluid without fluid, that is, the fluid below the reference pressure, is blocked to prevent fluid loss. Not only can it be done, but it has the effect of enabling high-speed operation, but since the open / close side is simply placed on the spring, it is difficult to operate the hemispherical close contact piece exactly by the opening of the cover due to the swing of the open / close side during the open / close operation. In addition, the opening and closing edge was a severe wear, due to the impact, it was a disadvantage such as a lot of difficulties in the processing of the metal body.

본 고안은 이러한 단점을 시정하고자 체크 밸브를 구성함에 있어서 금속으로 구성된 본체에 상하 덮개를 끼워 구성하되, 하부 덮개상에는 안내공이 뚫린 지지관체를 구성하고, 상기 지지관체의 안내공상에는 탄력 설치된 개폐변의 원형 봉체가 끼워져 결합되게 함과 동시에, 상부덮개는 본체에 구성된 작동실내로 약간 길게 돌출되게 하여 개폐변의 반구형 밀착편이 그 중심에 위치케 하며, 개폐변의 저면에는 저항원판을 함께 설치하여 원복시 스프링의 탄지력과 함께 유체의 흐름에 의해서도 원복이 더 한층 빨리 이루어지게 한 것이다.The present invention comprises a top and bottom cover fitted to the body made of metal in the configuration of the check valve to rectify the disadvantages, on the lower cover constitutes a support tube with a guide hole drilled, the circular opening of the opening and closing side of the guide pipe of the support tube At the same time, the upper body is projected into the operating chamber configured in the main body, and the hemispherical contact piece of the opening and closing side is positioned at the center thereof. Along with the intellect, the flow of fluid also makes restoring faster.

이하 본 고안의 실시예를 첨부도면에 따라 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

워터젯트 직기용 체크 밸브를 구성함에 있어서, 금속으로 구성된 본체(4)의 상단부에 상부 덮개(6)를 결합하되, 상부덮개(6) 내면에는 통공(12)과 완곡경사면(14)이 형성된 내부덮개(5)를 수지로 사출성형되게 하고, 하단부에는 하부 덮개(8)를 수지로 일체형 사출성형되게하므로서 본체(4)내에 작동실(10)이 구성되게 하고, 하부 덮개(8) 중앙에는 안내공(16)이 뚫린 지지관체(18)가 돌출 구성되어 있다.In constructing the water jet loom check valve, the upper cover 6 is coupled to the upper end of the body 4 made of metal, the inner surface of the upper cover 6 formed with a through hole 12 and a curved slope 14 The lid 5 is injection molded with resin, and the lower lid 8 is integrally injection molded with resin at the lower end so that the operating chamber 10 is configured in the main body 4, and the center of the lower lid 8 is guided. The support tube 18 in which the ball 16 was drilled is comprised.

또한 상하부 덮개(6)(8)는 본체(4) 내면에 끼워져 본체(4)의 상하단부로 돌출되지 않게 구성하고 하부덮개(8)에 돌출된 지지관체(18)의 안내공(16) 내저면에는 나선부(19)가 구성되어 있다.In addition, the upper and lower cover (6) (8) is fitted to the inner surface of the main body 4 so as not to protrude to the upper and lower ends of the main body 4 and in the guide hole 16 of the support tube 18 protruding from the lower cover (8) The spiral part 19 is comprised in the bottom face.

상기 지지관체(18) 외면에는 스프링(20)을 설치하고, 스프링(20)상에는 외주면에 다수의 통공(27)이 뚫린 저항원판(25)과 상면이 유선형으로 돌출 구성된 수지편(29)이 일체로 사출성형된 개폐변(22)을 안치하되, 개폐변(22)의 저면에 돌출 구성된 원형봉체(24)가 지지관체(18)의 안내공(16)에 끼워져 결합되게 하므로서 개폐변(22)과 저항원판(25)이 스프링(20)상에 탄력 설치되게 하고, 이때 개폐변(22) 상부에는 반구형 밀착편(26)이 구성되게 하여 내부 덮개에 구성된 완곡경사면(14)과 접하게 하여서 된 것이다.A spring 20 is installed on an outer surface of the support tube 18, and a resistance plate 25 having a plurality of through holes 27 formed on an outer circumferential surface thereof and a resin piece 29 having an upper surface protruding in a streamline shape are integrated on the spring 20. An injection molded opening and closing side 22 is placed, but the opening and closing side 22 so that the circular rod body 24 protruding on the bottom of the opening and closing side 22 is fitted into the guide hole 16 of the support pipe 18. And the resistance plate 25 is to be elastically installed on the spring 20, at this time the opening and closing side 22 to the hemispherical contact piece 26 is configured to come in contact with the elongated slope surface 14 configured on the inner cover. .

미 설명 부호Unexplained sign

(30)은 삽입부,30 is an insertion part,

(32)는 통공,32, through-holes,

(33)은 받침부33 silver support

(34)은 펌프,34 pumps,

(36)는 피스톤,36 the piston,

(38)는 유입관,38, the inlet pipe,

(40)은 유출관,40 is an outflow pipe,

(42)는 연결관,42 silver connector,

(44)는 노즐,44 nozzles,

(46)은 위사46 weft

(48)(50)은 체결볼트이다.48 and 50 are fastening bolts.

이와같이 구성된 본 고안은 유체의 펌핑(pumpping)시 역류현상 없이 일정한 량과 일정한 압의 유체만 신속정확하게 분사되어 원활한 제직을 기대할 수 있게 될 뿐 아니라 개폐변 부분의 마모를 최소로 줄여 사용 수명을 배가 시킬 수 있게 된다.In this way, the present invention is able to expect smooth weaving because only a certain amount and a certain pressure of fluid are injected quickly and accurately without backflow when pumping the fluid, and it can expect smooth weaving. It becomes possible.

즉 본체(4)의 작동실(10) 내에 위치하는 개폐변(22)의 원형봉체(24)가 하부덮개(8)의 지지관체(18)에 구성된 안내공(16)상에 끼워져 결합되게 함과 동시에 개폐변(22) 저면에는 저항원판(25)이 위치하고 있어, 개폐변(22)의 승강작동시 안내공(16)에 안내되어 흔들림없이 정확한 수직승강운동이 이루어지게 되므로 반구형 밀착편(26)이 내부덮개(5)의 통공(12)에 구성된 완곡경사면(14)과 정확한 위치에서 서로 개폐되어 유체의 차단을 명확히 할 수 있게 된다.That is, the circular rod 24 of the opening and closing side 22 located in the operating chamber 10 of the main body 4 is fitted on the guide hole 16 formed in the support tube 18 of the lower cover 8 to be coupled. At the same time, the resistance disc 25 is located at the bottom of the opening / closing side 22, and is guided to the guide hole 16 during the lifting operation of the opening / closing side 22, so that the accurate vertical lifting movement is made without shaking. ) Is opened and closed with each other at the correct position with the circumferential inclined surface 14 formed in the through-hole 12 of the inner cover 5 to be able to clarify the blocking of the fluid.

뿐만 아니라 개폐변(22)은 무게를 최경량화하므로서 유체의 흐름에도 원복이 이루어질 뿐 아니라, 이러한 상태에서 스프링(20)을 사용하면 유체의 흐름에 스프링(220)의 탄지력이 더해지게 되므로 보다 적극적인 원복 작동이 이루어지게 된다.In addition, the opening and closing edge 22 is made lighter in weight, and not only restoring the flow of the fluid, but also using the spring 20 in such a state that the force of the spring 220 is added to the flow of the fluid, which is more positive. The return operation is made.

상기에서 개폐변(22) 저면에 끼워진 저항원판(25)은 개폐변(22)의 작동시 유체의 흐름에 대한 저항을 보다 많이 작용할 수 있도록 하여 개폐변(22)의 승강작동이 보다 신속히 이루어질 수 있도록 함과 동시에 개폐를 위한 승강작동시 지지관체(18)의 상면 받침부(33)와 접하게 하므로서 개폐변(22)의 마모를 줄이기 위한 것이다.The resistance disc 25 fitted to the bottom of the opening and closing edge 22 in the above operation so that the resistance to the flow of the fluid during the operation of the opening and closing edge 22 can be increased more, the lifting operation of the opening and closing edge 22 can be made more quickly. In order to reduce the wear of the opening and closing side 22 while at the same time in contact with the upper surface supporting portion 33 of the support tube 18 during the lifting operation for opening and closing.

또한 개폐변(22) 상면에 구성된 수지편(29)은 상단부가 유선형으로 돌출되어 있어 유체의 유입시 와류현상을 최소화 시키게 된다.In addition, the resin piece 29 formed on the top surface of the opening and closing side 22 is protruded in a streamlined shape to minimize the vortex phenomenon when the fluid is introduced.

이때 지지관체(18)에 구성된 안내공(16)과 원형봉체(24) 사이에는 유체의 흐름이 없기 때문에 이물질이 끼일 우려가 없고, 원형봉체(24)가 안내공(16)보다 다소 길게 구성되어 있으므로 개폐변(22)의 승강작동이 항상 원활하게 이루어지게 된다.At this time, since there is no fluid flow between the guide hole 16 and the circular bar 24 formed in the support pipe 18, there is no risk of foreign matter being caught, and the circular bar 24 is configured to be somewhat longer than the guide hole 16. Therefore, the lifting operation of the opening and closing side 22 is always made smoothly.

본 고안의 체크밸브(2)를 제작함에 있어서 상부덮개(6)에 구성되는 내부덮개(5)와, 본체(4) 저면에 구성되는 하부덮개(8), 개폐변(22)에 구성되는 수지편(29) 및 저항원판(25)은 모두 수지로 사출성형하기 때문에 제작이 용이하게 된다.In manufacturing the check valve 2 of the present invention, the inner cover 5 of the upper cover 6, the lower cover 8 of the bottom of the main body 4, the resin formed on the opening and closing side 22 Both the piece 29 and the resistance disc 25 are injection molded with resin, so that the fabrication is easy.

뿐만 아니라 펌프 내에 체크밸브(2)를 조립시 체결력이 작용되는 상부덮개(6)와 본체(2)는 금속으로 구성되어 있어 체결볼트(48)(50)를 죄이는 정도에 관계없이 항상 일정한 형태를 유지하게 된다.In addition, the upper cover (6) and the main body (2) to which the tightening force is applied when assembling the check valve (2) in the pump is made of metal so that it is always a constant shape regardless of the degree of tightening the fastening bolts 48 and 50. Will be maintained.

상기 본 고안을 구성함에 있어서 하부덮개(8)에 구성된 나선부(19)는 체크밸브(2)를 분해하고자 할 때, 나선부(19) 상에 볼트(도시안됨)를 결합하게 되면 볼트의 선단부가 개폐변(22)의 원형봉체(24) 저면을 밀어올리게 되므로 상부덮개(6)가 쉽게 분리되어 분해가 매우 용이하게 이루어지게 된다.In the construction of the present invention, when the spiral portion 19 formed in the lower cover 8 is to disassemble the check valve 2, when the bolt (not shown) is coupled to the spiral portion 19, the tip of the bolt Since the upper surface of the circular bar 24 of the opening and closing side 22 is pushed up, the upper cover 6 is easily separated and easily made.

또한 본 고안의 체크밸브(2)를 구성함에 있어서, 작동실(10) 내에 끼워진 스프링(20)의 탄성을 조정하여 최적의 조건을 만족케하여 사용하면 효과적이다.In addition, in configuring the check valve 2 of the present invention, it is effective to adjust the elasticity of the spring 20 fitted in the operating chamber 10 to satisfy the optimum conditions.

따라서 본 고안은 개폐변의 개폐작동이 신속정확하게 이루어지도록 하므로서 정확한 량 및 압을 가진 유체가 고속으로 펌핑되게 함과 동시에 작동부의 마모를 최소로 줄일 수 있는 등의 효과가 있는 것이다.Therefore, the present invention has an effect such that the opening and closing operation of the opening and closing valve can be made quickly and accurately, so that the fluid having the correct amount and pressure is pumped at high speed, and at the same time, the wear of the operating part can be minimized.

Claims (1)

워터젯트 직기용 체크밸브를 구성함에 있어서, 금속으로 구성된 본체(4) 상하 단부 내면에 상부덮개(6)와 하부덮개(8)를 각각 구성하고, 하부덮개(8) 중앙에는 안내공(16)이 뚫린 지지관체(18)를 돌출 구성하고, 상기 지지판체(18)의 안내공(16)상에는 유선형 수지편(29)과 저항원판(25)이 일체로 구성된 개폐변(22)의 원형 봉체(24)가 끼워져 결합되게 하되, 저항원판(25)의 외측에는 다수의 통공(27)을 뚫어 구성하므로서 유체가 가장 효율적으로 펌핑되게 함과 동시에 마모를 최소화할 수 있도록 하여서 된 워터제트 직기용 체크밸브.In constructing the water jet loom check valve, the upper cover 6 and the lower cover 8 are respectively formed on the upper and lower end inner surfaces of the main body 4 made of metal, and the guide hole 16 is formed at the center of the lower cover 8. The perforated support tube 18 is formed to protrude, and on the guide hole 16 of the support plate body 18, a circular rod body of the opening / closing side 22 in which the streamlined resin piece 29 and the resistance disc 25 are integrally formed ( 24 is fitted to be coupled, but by forming a plurality of through-holes 27 on the outside of the resistance disk 25 to ensure that the fluid is pumped most efficiently and at the same time to minimize the wear of the water jet loom check valve .
KR2019970020540U 1997-07-25 1997-07-25 Water Jet Loom Check Valve KR19980014224U (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR2019970020540U KR19980014224U (en) 1997-07-25 1997-07-25 Water Jet Loom Check Valve
TW087112057A TW428059B (en) 1997-07-25 1998-07-23 Nonereturn valve for water-jet loom
JP10210735A JP3002979B2 (en) 1997-07-25 1998-07-27 Check valve for water jet loom

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KR2019970020540U KR19980014224U (en) 1997-07-25 1997-07-25 Water Jet Loom Check Valve

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JP5199182B2 (en) * 2009-05-26 2013-05-15 栗本商事株式会社 Check valve and check valve body used therefor
JP5643586B2 (en) * 2010-09-15 2014-12-17 株式会社テイエルブイ Check valve
DE102010062173A1 (en) 2010-11-30 2012-05-31 Robert Bosch Gmbh Valve, in particular outlet valve of a hydraulic piston pump
KR101740254B1 (en) * 2013-01-05 2017-05-26 킴르 하이테크 인코퍼레이티드 Electronic cigarette
CN103448710A (en) * 2013-08-05 2013-12-18 天津机辆轨道交通装备有限责任公司 Check valve of train brake distribution valve
JP6386772B2 (en) * 2014-04-21 2018-09-05 前澤給装工業株式会社 Packing integrated check valve
CN106255823B (en) * 2014-04-25 2020-09-29 日立汽车***株式会社 Valve mechanism and high-pressure fuel pump
JP6596304B2 (en) * 2015-10-30 2019-10-23 日立オートモティブシステムズ株式会社 High pressure fuel supply pump
WO2018143158A1 (en) 2017-01-31 2018-08-09 株式会社フジキン Switching valve
CN110645384A (en) * 2018-06-27 2020-01-03 无锡市荣跃纺机专件厂 Ceramic ball one-way valve of water-spraying braiding machine
US20210190218A1 (en) * 2021-02-01 2021-06-24 Intel Corporation Pressure regulator valve assembly for quick disconnect fittings

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JPH11100750A (en) 1999-04-13
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