CN103511772B - A kind of scalable rotatable metallic pipe coupling - Google Patents
A kind of scalable rotatable metallic pipe coupling Download PDFInfo
- Publication number
- CN103511772B CN103511772B CN201310475411.1A CN201310475411A CN103511772B CN 103511772 B CN103511772 B CN 103511772B CN 201310475411 A CN201310475411 A CN 201310475411A CN 103511772 B CN103511772 B CN 103511772B
- Authority
- CN
- China
- Prior art keywords
- cylinder barrel
- piston
- joint assembly
- tube joint
- piston rod
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Classifications
-
- 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
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement
- F16L27/125—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement having longitudinal and rotary movement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention provides a kind of scalable rotatable metallic pipe coupling, comprise tube joint assembly and connecting pipe component, connecting pipe component comprises piston component and the cylinder barrel coordinating with it, and one end of cylinder barrel coordinates with piston component slipper seal, and the other end of cylinder barrel is connected with tube joint assembly; Piston component comprises the piston rod of hollow tubular, and one end of piston rod is the piston head with central through hole that is placed in cylinder barrel, and the other end of piston rod is connected with pipe joint outside cylinder barrel. The front end of described cylinder barrel is the front head coordinating with piston rod, front head and cylinder barrel intersection have steam vent, the rear end of cylinder barrel is the internal thread hole being connected with tube joint assembly, and there is the annular end face corresponding with tube joint assembly in internal thread hole outside, has V-arrangement circumferential groove on annular end face. Tube joint assembly comprises the standard pipe joint that is threaded part and is connected with pipeline being connected with cylinder barrel being connected as a single entity. The piston head of piston component comprises two circumferential groove and is arranged on two sealing rings in circumferential groove. The present invention is simple in structure, with low cost, reliable operation.
Description
Technical field
The invention belongs to the building block of pneumatic gearing system, be specifically related to a kind of scalable rotatable pipeJoint.
Background technology
In pneumatic gearing system, pipeline, pipe joint are conventional pneumatic elements, play pneumatic biographyThe function that moving system each several part couples together. In the pneumatic system of elevated pressures (more than 3MPa),Conventional pipeline is metal hose, metal hard pipeline, and pipe joint is generally metal, and metal material is logicalNormal is stainless steel, aluminium alloy, titanium alloy. The internal layer of metal hose is generally nonmetallic materials and makes,Surface is comparatively coarse, under identical pipeline internal diameter, the gas communication ability of metal hose significantly lower thanThe metal hard pipeline that inwall is comparatively smooth. For guaranteeing the negotiability of gas element, pneumatic gearing systemIn system, conventionally adopt metal hard pipeline, metallic pipe coupling.
Under specific operation, pneumatic gearing system and corresponding product are connected to metal hard pipeline, simultaneouslyRequire this pipeline position there is in the course of the work larger axial stretching (more than 10mm), around pipelineThe ability of axis rotation (as 360 °), for example air bag can produce larger axle in inflation/deflation processTo flexible, and follow definite shape distortion and produce rotation, when metallic pipe coupling and the gas of pneumatic systemWhen the air inlet connecting ozzle of capsule connects, metallic pipe coupling need to possess scalable rotatable function.
Utility model patent CN2097939U pipe joint, the waveform expansion and contraction that utilizes plastic material to makeThe version of pipe realizes the scalability at pipe joint position, expands with heat and contract with cold so that compensation conduit is operatingFunction. Due to the limitation of material and version, this pipe joint can not be used for high pressure, scalable modelEnclose minimumly, and can not rotate. The telescopic bellows tube of utility model patent CN201320026726 connectsHead, adopts bellows to solve pipe joint position because of the internal stress effect of expanding with heat and contract with cold, and causes pipelineThe joint problem that easily infiltration is leaked. Bellows can possess certain axial stretching, lateral displacement,Angular displacement, but the scalable scope of this pipe joint is little, substantially can not rotate. Invention CN201210519022Flexible rotating expansion pipe joint, comprise link joint, locating ring, caging bolt, locating flange,Outer cylinder and inner cylinder tube, together with described link joint is welded and fixed with locating ring, link joint is with fixedPosition boxing is connected on inner cylinder tube, and locating flange is welded on outer cylinder, and caging bolt is connected to and connectsBetween head and locating flange, outer cylinder is fixedly connected with by clamp nut with inner cylinder tube. Do not affecting examinationIn the situation that pump requires and performance data is measured, solve closed loop test-bed pump testing pipeline rigid connection and causeTime cost too high, financial cost is too high, pump testing pipe arrangement too much and the low row of pump testing operating efficiencyAn industry difficult problem. This invention is to be used in assembling process, can not realize in the course of the work rotatable stretchingContracting.
Summary of the invention
The invention provides a kind of scalable rotatable metallic pipe coupling, object is to solve high pressure resistant metalAxial scalable circumferential rotatable problem in hard pipeline.
Technical scheme of the present invention: the scalable rotatable metallic pipe coupling of one of the present invention comprises that pipe connectsAssembly and connecting pipe component, connecting pipe component comprises piston component and the cylinder barrel coordinating with it, cylinder barrelOne end coordinate with piston component slipper seal, the other end of cylinder barrel is connected with tube joint assembly; PistonAssembly comprises the piston rod of hollow tubular, and one end of piston rod is the central through hole that has that is placed in cylinder barrelPiston head, the other end of piston rod is connected with pipe joint outside cylinder barrel.
The front end of described cylinder barrel is the front head coordinating with piston rod, and front head and cylinder barrel intersection haveSteam vent, the rear end of cylinder barrel is the internal thread hole being connected with tube joint assembly, internal thread hole outside have withThe annular end face that tube joint assembly is corresponding, has V-arrangement circumferential groove on annular end face.
Described tube joint assembly comprise being connected with cylinder barrel of being connected as a single entity be threaded part and with pipeThe standard pipe joint that road connects.
The piston head of described piston component comprises the first circumferential groove and is arranged in the first circumferential grooveSealing ring.
The piston head of described piston component comprises the second circumferential groove and is arranged on the work in circumferential grooveChock plug guide ring.
There is inner ring type groove the front head inner side of described cylinder barrel, establishes piston rod guide ring in inner ring type groove,Between the annular end face of the rear end of cylinder barrel and tube joint assembly, establish the second seal washer.
The piston rod guide ring of establishing in described inner ring type groove adopts red copper to make, and thickness is 0.5mm～3mm.
The cross section of the V-arrangement circumferential groove of opening on the annular end face of the rear end of described cylinder barrel is equilateral triangle,Leg-of-mutton height is 0.3mm～0.8mm.
Described piston head guide ring is the annular not sealing, and adopts material wear-resisting and that coefficient of friction is lowerMaterial is made.
Described sealing ring is general plug sealing ring, in when assembling, the U-shaped open end of general plug sealing ring toHigh pressure admission end.
Advantage of the present invention:
Metallic pipe coupling of the present invention can extend in the course of the work+rotate, shrink+rotate, flexible+Rotation, can realize and rotate in a circumferential direction 360 °. Have simple in structure, with low cost, reliable operation,Feature applied widely, can meet comparatively severe vibration, shock environment requirement. Of the present inventionEach parts machining good manufacturability, has adopted the parts of producing in batches as far as possible, is convenient to batch production.
Brief description of the drawings
Fig. 1 is the exploded view of the embodiment of the present invention;
Fig. 2 is the structural representation of embodiment of the present invention elongation state;
Fig. 3 is the structural representation of embodiment of the present invention contraction state;
Fig. 4 is the cylinder barrel schematic diagram of inventive embodiments;
Fig. 5 is the I place partial enlarged drawing of Fig. 4;
Fig. 6 is the exploded view of piston component;
Fig. 7 is piston head partial schematic diagram;
Fig. 8 is the general plug sealing ring part enlarged drawing of piston head.
Fig. 9 is the exploded view of tube joint assembly;
Figure 10 is that the present invention is applied in the schematic diagram in airbag apparatus.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 6, the scalable rotatable metal tube of one of the present invention connectsHead comprises tube joint assembly 4, the connecting pipe component that can be assembled together. Described connecting pipe component comprisesPiston component 1 and the cylinder barrel 2 coordinating with it, one end of cylinder barrel 2 and piston component 1 slipper seal are joinedClose, the other end of cylinder barrel 2 is connected with tube joint assembly 4; Piston component 1 comprises the work of hollow tubularStopper rod 1a, one end of piston rod 1a is the piston head 1b with central through hole that is placed in cylinder barrel 2,The other end of piston rod 1a is connected with pipe joint 3 outside cylinder barrel 2. The aperture of piston rod 1a is 14mm,External diameter is 18.3mm, and the diameter of piston head 1b central through hole is 14mm, and axial length is 15mm.
Pipe joint 3 is for having externally threaded pressure inlet, the steel welding that 1Cr18Ni9Ti stainless steel is madePressure inlet 14YC122-89, adopts welding manner to be connected with piston rod 1a.
As shown in Figure 4, Figure 5, the front end of described cylinder barrel 2 is and the front envelope of piston rod 1a matched in clearance2a, front head 2a and cylinder barrel 2 intersections have steam vent 2b, and steam vent 2b is the spiral shell of 2 M5Pit, can drain into atmosphere by the gas in the cavity of interior cylinder barrel 2 one end, when piston component 1 is at cylinder barrel 2When interior motion, can not form and affect the closed cavity that piston component 1 moves. The quantity of steam vent, largeLittlely design with reference to single-acting cylinder.
The rear end of described cylinder barrel 2 have the internal thread hole 2c being connected with tube joint assembly 4 be M27 ×1.5-7H, there are the annular end face 2d corresponding with tube joint assembly 4, annular end face in internal thread through hole outsideOn 2d, have V-arrangement circumferential groove 2e.
There is inner ring type groove 2a1 the front head 2a inner side of described cylinder barrel 2, in inner ring type groove 2a1, establishes pistonBar guide ring 5, establishes seal washer between the annular end face 2d of the rear end of cylinder barrel 2 and tube joint assembly 46。
The dimensional accuracy of cylinder barrel 2 inner chambers and piston head 1b matching part is high, form and position tolerance is little, surperficial matterMeasure high. Cylinder barrel 2 adopts stainless steel 1Cr18Ni9Ti to make, and internal diameter is 25mm(8 class precision), outerFootpath 33.5mm, axial length L is 72.5mm, the cylindricity 0.01mm of inwall; The roughness of inwallRa is 1.6 μ m, meets the ability that is assemblied in piston component 1 rapid movement wherein.
The cross section of the V-arrangement circumferential groove 2E opening on the annular end face 2d of the rear end of described cylinder barrel 2 is equilateralTriangle, leg-of-mutton height is 0.5mm. The effect of V-arrangement circumferential groove 2E is to improve seal washer 6Sealing effectiveness.
The annular end face 2d of the rear end of described cylinder barrel 2 establishes seal washer 6, and seal washer 6 is by pipe jointAfter assembly 4 compresses, form distortion at V-arrangement circumferential groove 2E position, obtain good sealing effectiveness. SealingPacking ring 6 adopts red copper to make, and thickness is 2mm, internal diameter 28mm, external diameter 33.5mm.
The piston head 1b of described piston component 1 and cylinder barrel 2 inner chambers are matched in clearance, gap be 0.1mm～0.15mm。
The piston head 1b of described piston component 1 comprises the first circumferential groove and is arranged in circumferential grooveSealing ring 1c. The first circumferential groove is wide is 4.8mm, is 3.1mm deeply.
The piston head 1b of described piston component 1 comprises the second circumferential groove and is arranged in circumferential groovePiston head guide ring 1d. The second circumferential groove is wide is 5.5mm, is 2.2mm deeply.
Described piston rod guide ring 5, piston head guide ring 1d are the annular not sealing, and adopt wear-resistingAnd the lower polytetrafluoroethylene (PTFE) of coefficient of friction is made. Piston rod guide ring 5, piston head guide ring 1dEffect be for piston rod 1a, piston head 1b rapid movement be steadily, the clearance ruler of mating surfaceVery little stable, caloric value is little.
As Fig. 7, Fig. 8, the general plug sealing ring of the special health of the M2 type of the preferred Te Ruibao of described sealing ring 1c, rootAccording to the sealing ring of cylinder barrel 2 internal diameter 25mm choice criteria series. The general plug sealing ring of the type can meet fortuneMoving speed is not more than the operating mode that 15m/s, rotary speed are not more than 1m/s. In the time of assembling, general plug sealingThe U-shaped open end of circle is to high pressure admission end g. General plug sealing ring is the polytetrafluoroethylene (PTFE) in U-shaped cross sectionIn annular element, be equipped with the high-performance sealed part of spring, the inwall of polytetrafluoroethylene (PTFE) annular part and cylinder barrel 2Laminating; Spring provides elastic force, guarantees that the inwall of general plug sealing ring and cylinder barrel 2 is fully fitted, and obtains goodGood sealing effectiveness.
Fig. 9 is the exploded view of tube joint assembly 4, and described tube joint assembly 4 comprises employing welding sideThe pipe joint 4b that the part 4a that is threaded being connected with cylinder barrel 2 that formula becomes one is connected with pipeline.The part that is threaded 4a is the external thread structure with flange face, and middle part has through hole, and its diameter is14mm, external screw thread forms and is connected with the screw thread position of cylinder barrel 2, and flange face is used for realizing assembling pipe jointAxial location when assembly 4 press seal packing ring 6. Pipe joint is for having externally threaded pressure inlet,The steel welding pressure inlet 14YC122-89 that 1Cr18Ni9Ti stainless steel is made, with the part that is threaded4a adopts welding manner to connect. Threaded joints is divided into the external thread structure with flange face, inPortion has through hole, and external screw thread forms and is connected with the screw thread position of cylinder barrel, and flange face is used for realizing assembling pipeAxial location when adapter assembly press seal pad. Pipe joint is preferentially selected the standard pipe of batch productionJoint.
Described sealing screw 7 is screw M5 × 6(GB/T67-2000),, in the time that the present invention does not workThe steam vent 2b that is assemblied in cylinder barrel 2 is upper, to avoid fifth wheel to enter cylinder barrel 2 inside.
The metallic pipe coupling of the present embodiment can be realized elongation+spinfunction, internal diameter 14mm(inside nominal diameterBe slightly less than d, about 12mm), maximum axial extended travel is 57.5mm. In the course of the work, strokeWhile being not more than 57.5mm, all can normally work. The present invention can be applied in the operating mode that is not more than 30MPa.
The maximal dilation speed of pipe joint of the present invention, maximum rotative speed depend primarily on the property of sealing ringEnergy. Maximum retractable travel of the present invention depends on the movement travel of piston head in cylinder barrel.
Figure 10 is that the present invention is applied in the schematic diagram in airbag apparatus: the present invention is for airbag apparatusTime, gas cylinder 23 is by pipeline, stop valve 24, magnetic valve 25, scalable rotatable gold of the present inventionBelong to pipe joint 26 and be connected to airbag apparatus 22, the internal diameter of pipeline is 14mm. Airbag apparatus is for fixing notMoving, but in inflation, deflation course, its air inlet position can produce the axial displacement that is not more than 45mm,Axially-movable speed is not more than 4m/s; Can produce the rotation that is not more than 25 ° simultaneously. Adopt scalable canRotating metallic pipe joint obtains pipeline and has higher negotiability, can realize filling fast air bagGas, meets instructions for use.
Claims (5)
1. a scalable rotatable metallic pipe coupling, comprises tube joint assembly and connecting pipe component, itsBe characterised in that: connecting pipe component comprises piston component (1) and the cylinder barrel (2) coordinating with it, cylinder barrel (2)One end coordinate with piston component (1) slipper seal, the other end and the tube joint assembly of cylinder barrel (2)(4) connect; Piston component (1) comprises the piston rod (1a) of hollow tubular, piston rod (1a)One end is for being placed in the piston head with central through hole (1b) of cylinder barrel (2), piston rod (1a)The other end is connected with pipe joint (3) outside cylinder barrel (2); The front end of cylinder barrel (2) is and piston rod (1a)The front head (2a) coordinating, there is steam vent (2b) the inner of front head (2a), after cylinder barrel (2)End is the internal thread hole (2c) being connected with tube joint assembly (4), internal thread hole (2c) outside have withThe annular end face (2d) that tube joint assembly (4) is corresponding, on annular end face (2d), have V-ring toGroove (2e); Tube joint assembly (4) comprises the threaded joints being connected with cylinder barrel (2) being connected as a single entityDivide (4a) and the standard pipe joint (4b) being connected with pipeline; The piston head (1b) of piston component (1)Comprise the first circumferential groove and be arranged on the sealing ring (1c) in the first circumferential groove; Piston component (1)Piston head (1b) comprise the second circumferential groove and be arranged on piston head in the second circumferential groove guidingRing (1d); There are inner ring type groove (2a1), inner ring type in front head (2a) inner side of described cylinder barrel (2)Piston rod guide ring (5) is set, the annular end face (2d) of the rear end of cylinder barrel (2) in groove (2a1)And between tube joint assembly (4), establish seal washer (6).
2. scalable rotatable metallic pipe coupling according to claim 1, is characterized in that: instituteState the piston rod guide ring (5) established in inner ring type groove (2a1) and adopt red copper to make, thickness be 0.5mm～3mm。
3. scalable rotatable metallic pipe coupling according to claim 1 and 2, is characterized in that:The cross section of the V-arrangement circumferential groove (2e) of opening on the annular end face (2d) of the rear end of described cylinder barrel (2) isEquilateral triangle, leg-of-mutton height is 0.3mm～0.8mm.
4. scalable rotatable metallic pipe coupling according to claim 1 and 2, is characterized in that:The annular of described piston head guide ring (1d) for not sealing, adopts wear-resisting and coefficient of friction is lowerMaterial is made.
5. scalable rotatable metallic pipe coupling according to claim 1 and 2, is characterized in that:Described sealing ring (1c) is general plug sealing ring, in the time of assembling, and the U-shaped open end of general plug sealing ringTo high pressure admission end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310475411.1A CN103511772B (en) | 2013-10-12 | 2013-10-12 | A kind of scalable rotatable metallic pipe coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310475411.1A CN103511772B (en) | 2013-10-12 | 2013-10-12 | A kind of scalable rotatable metallic pipe coupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103511772A CN103511772A (en) | 2014-01-15 |
| CN103511772B true CN103511772B (en) | 2016-06-08 |
Family
ID=49894953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310475411.1A Active CN103511772B (en) | 2013-10-12 | 2013-10-12 | A kind of scalable rotatable metallic pipe coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103511772B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105836146A (en) * | 2016-05-04 | 2016-08-10 | 合肥江航飞机装备有限公司 | Corrugated pipe valve assembly for airplane fuel regulator |
| CN109430064A (en) * | 2018-11-16 | 2019-03-08 | 上海麦喀斯机械设备有限公司 | A kind of telescopic device for eliminating radial pull for milking machine disk middle spindle |
| CN113685634A (en) * | 2020-05-19 | 2021-11-23 | 中国石油天然气股份有限公司 | Hot water circulation hose short circuit and beam-pumping unit |
| CN112682603B (en) * | 2020-12-21 | 2022-04-01 | 安徽蓝通科技股份有限公司 | Telescopic pipe head adapting to size of PVC pipe |
| CN112682608B (en) * | 2021-03-11 | 2021-06-04 | 天津金海通半导体设备股份有限公司 | Follow-up telescopic cylinder device for conveying high-temperature and low-temperature liquid |
| CN113464751A (en) * | 2021-06-16 | 2021-10-01 | 中船动力研究院有限公司 | High-pressure oil pipe and high-pressure oil pipe assembling method |
| CN115978334B (en) * | 2022-12-19 | 2024-07-30 | 西南石油大学 | Pipeline voltage stabilizer for oil gas storage and transportation |
| CN116267529A (en) * | 2023-04-19 | 2023-06-23 | 江苏省海洋资源开发研究院(连云港) | Telescopic water spraying device of large sprinkler |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1911423A (en) * | 1931-05-25 | 1933-05-30 | George W Biller | Hose coupling |
| US5653476A (en) * | 1995-09-18 | 1997-08-05 | National Science Council Of Republic Of China | Leakproof rotary joint |
| CN1587778A (en) * | 2004-09-14 | 2005-03-02 | 葛文宇 | Pipeline connecting method for earth quake area |
| CN202140715U (en) * | 2011-06-08 | 2012-02-08 | 武汉海王机电工程技术公司 | Mechanical automatic regulation telescopic unit |
| CN203147107U (en) * | 2013-03-04 | 2013-08-21 | 浙江海亮股份有限公司 | Reliable sealing purging joint |
-
2013
- 2013-10-12 CN CN201310475411.1A patent/CN103511772B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1911423A (en) * | 1931-05-25 | 1933-05-30 | George W Biller | Hose coupling |
| US5653476A (en) * | 1995-09-18 | 1997-08-05 | National Science Council Of Republic Of China | Leakproof rotary joint |
| CN1587778A (en) * | 2004-09-14 | 2005-03-02 | 葛文宇 | Pipeline connecting method for earth quake area |
| CN202140715U (en) * | 2011-06-08 | 2012-02-08 | 武汉海王机电工程技术公司 | Mechanical automatic regulation telescopic unit |
| CN203147107U (en) * | 2013-03-04 | 2013-08-21 | 浙江海亮股份有限公司 | Reliable sealing purging joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103511772A (en) | 2014-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103511772B (en) | A kind of scalable rotatable metallic pipe coupling | |
| CN110778827B (en) | Quick-change connector for sealing and inflating unthreaded hole | |
| CN108095824A (en) | A kind of central aeration modularization pneuma-lock motion arm | |
| CN207921425U (en) | A kind of pressure reducing valve | |
| CN111140557A (en) | S-shaped bellows type energy accumulator with novel structure | |
| CN106872170B (en) | Magnitude of interference for bearing installation simulates fixture | |
| CN209767309U (en) | Ultra-silent electric cylinder | |
| CN208090134U (en) | Telescoping tube | |
| CN114370513B (en) | Internal expansion sealing valve | |
| CN206160980U (en) | Servo mechanism displacement sensor mounting structure | |
| CN210623551U (en) | Water pressure sealed waterproof rubber ring | |
| CN203686338U (en) | Novel anti-torsion structure of corrugated pipe | |
| CN212985666U (en) | Telescopic and rotary power cylinder | |
| CN211652307U (en) | Piston type gas-fixed liquid-distributing device for winch | |
| CN208496232U (en) | A kind of floating type grasping mechanism for engine cylinder cover cylinder body mould assembling | |
| CN209309313U (en) | A kind of self-compensation type dynamic seal structure and damping device | |
| CN107907082A (en) | A kind of mechanism that can eliminate displacement sensor installation gap | |
| CN209041210U (en) | A kind of stable type oil gas cylinder structure | |
| CN207715470U (en) | A kind of bucket rod cylinder of excavator | |
| CN205618468U (en) | Pushing -type clamping device is with rotatory hydro -cylinder in among CNC tube bending machine | |
| CN206429476U (en) | A kind of high-precision hydraulic cylinder | |
| CN101210571A (en) | Series connection separable filling sealing device for pump | |
| CN201100502Y (en) | Spherical pipeline compensator | |
| CN215762189U (en) | Packing is with automatic tight device that expands | |
| CN110410450B (en) | Hydraulic cylinder for buffer engineering machinery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |