CN104458194A - Hydraulic drive device and mode for axial movement of wind tunnel super expansion segment - Google Patents
Hydraulic drive device and mode for axial movement of wind tunnel super expansion segment Download PDFInfo
- Publication number
- CN104458194A CN104458194A CN201410554973.XA CN201410554973A CN104458194A CN 104458194 A CN104458194 A CN 104458194A CN 201410554973 A CN201410554973 A CN 201410554973A CN 104458194 A CN104458194 A CN 104458194A
- Authority
- CN
- China
- Prior art keywords
- cylinder pressure
- wind
- expanded section
- intermediate liquid
- ear seat
- 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.)
- Granted
Links
Landscapes
- Wind Motors (AREA)
- Tents Or Canopies (AREA)
Abstract
The invention discloses a hydraulic drive device and mode for axial movement of a wind tunnel super expansion segment. The hydraulic drive device comprises three hydraulic cylinders connected with one another in series, and the three hydraulic cylinders are connected with devices and linear guide rails through lug bases. The hydraulic drive mode includes the steps that the oil inlet amount of the three hydraulic cylinders is sequentially controlled according to the distance requirement of movement of the wind tunnel super expansion segment, so that the devices connected with the three hydraulic cylinders and the linear guide rails through the lug bases are made to be pushed in a level by level mode. According to the hydraulic drive device and mode, after the three hydraulic cylinders are connected in series, the devices are pushed to move in the level by level mode, the problem that the hydraulic cylinders are excessively large in size due to the fact that a single hydraulic cylinder pushes the devices to move is solved, and the three hydraulic cylinders small in size replace the single hydraulic cylinder, so that the device cost is reduced, the difficulty in device installation and fixing is lowered, and the hydraulic drive device and mode are convenient to design and operate.
Description
Technical field
The present invention relates to hydraulic driving mode, comprise the transfer route of hydraulic cylinder type of attachment, arrangement and power, particularly a kind of fluid pressure drive device of moving axially for wind-tunnel ultra-expanded section and mode thereof.
Background technology
Ultra-expanded section is wind-tunnel vitals, and requirement can move forward and backward along wind-tunnel axis direction, ensures that wind-tunnel can be opened at any time after off-test, facilitates staff to carry out equipment inspection and replacing.
Because ultra-expanded section size is comparatively large, for the requirement meeting ultra-expanded section easy motion adopts hydraulic-driven usually.And be the requirement meeting the motion of wind-tunnel ultra-expanded section, usually adopt single Driven by Hydraulic Cylinder, because stroke causes more greatly hydraulic cylinder size comparatively large, the expense of ordering is comparatively large, and large-sized hydraulic cylinder installs fixing relative difficulty.
Summary of the invention
In order to solve the problem of prior art, the embodiment of the present invention on the one hand provides a kind of fluid pressure drive device moved axially for wind-tunnel ultra-expanded section, and it comprises: head hydraulic cylinder, the cylinder seat of described head hydraulic cylinder by the first web member and earth surface to provide support; Intermediate liquid cylinder pressure, the cylinder seat of described intermediate liquid cylinder pressure is connected to move under the driving of head hydraulic cylinder with the expansion link of described head hydraulic cylinder; Tail washings cylinder pressure, the expansion link of described tail washings cylinder pressure is connected with the expansion link of described intermediate liquid cylinder pressure, and the cylinder seat of described tail washings cylinder pressure is connected under the drive of described intermediate liquid cylinder pressure, drive described wind-tunnel ultra-expanded section to move by the second web member with wind-tunnel ultra-expanded section; For moving for described intermediate liquid cylinder pressure the first guide rail providing guiding, described first guide rail is provided with travelling carriage, described travelling carriage is connected with described intermediate liquid cylinder pressure by the 3rd web member; And for for moving the second guide rail providing guiding in described wind-tunnel ultra-expanded section, described second guide rail is connected with described wind-tunnel ultra-expanded section by the travelling carriage of its upper setting.
In fluid pressure drive device described above, preferably, described first web member comprises the first ear seat and the second ear seat; The side of described head hydraulic cylinder is by described first ear seat and earth surface, and the opposite side of described head hydraulic cylinder is by described second ear seat and earth surface.
In fluid pressure drive device described above, preferably, described second web member comprises: the 5th ear seat, the 6th ear seat and the 7th ear seat; The side of described tail washings cylinder pressure is connected with described wind-tunnel ultra-expanded section with described 6th ear seat by interconnective described 5th ear seat, and the opposite side of described tail washings cylinder pressure is connected with described wind-tunnel ultra-expanded section by described 7th ear seat.
In fluid pressure drive device described above, preferably, described 3rd web member comprises: third ear seat and the 4th ear seat; The side of described intermediate liquid cylinder pressure is connected with the travelling carriage on described first guide rail by described third ear seat, and the opposite side of described intermediate liquid cylinder pressure is connected with the travelling carriage on described first guide rail by described 4th ear seat.
The embodiment of the present invention provides the hydraulic driving mode of the fluid pressure drive device moved axially for wind-tunnel ultra-expanded section on the other hand, it comprises: when wind-tunnel ultra-expanded section need move forward, first the oiling of described head hydraulic cylinder is given, make described head hydraulic cylinder be in the state of stretching out to move forward on described first guide rail to promote described intermediate liquid cylinder pressure, by the power transmission of described intermediate liquid cylinder pressure, described tail washings cylinder pressure and wind-tunnel ultra-expanded section are also moved forward, after described head hydraulic cylinder reaches total travel, give the oiling of described intermediate liquid cylinder pressure to promote described tail washings cylinder pressure and wind-tunnel ultra-expanded section moves forward, promote described wind-tunnel ultra-expanded section to after described intermediate liquid cylinder pressure reaches total travel the oiling of described tail washings cylinder pressure to move forward, when wind-tunnel ultra-expanded section need be moved backward, move first to the oiling of described tail washings cylinder pressure backward to promote described wind-tunnel ultra-expanded section, after described tail washings cylinder pressure reaches total travel, give the oiling of described intermediate liquid cylinder pressure to promote described tail washings cylinder pressure and wind-tunnel ultra-expanded section is moved backward, move to promote described wind-tunnel ultra-expanded section to after described intermediate liquid cylinder pressure reaches total travel the oiling of described head hydraulic cylinder backward.
The beneficial effect that the embodiment of the present invention is brought is as follows:
Adopt arranged in series to obtain three hydraulic cylinders, and linked together by ear seat and ground, the first guide rail and wind-tunnel ultra-expanded section.According to the oil inlet quantity of the required distance hydraulic control cylinder of wind-tunnel ultra-expanded section movement during use, realize classification and promote wind-tunnel ultra-expanded section, improve ultra-expanded section and move axially distance, ensure that ultra-expanded section displacement requirement, avoid and namely reduce hydraulic cylinder size by the single Hydraulic Cylinder equipment wind-tunnel ultra-expanded section oversize problem of the hydraulic cylinder that causes of moving, replace single hydraulic cylinder to reduce equipment cost by three small size hydraulic cylinders simultaneously, the equipment that reduces installs fixing difficulty, convenient design and operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of fluid pressure drive device moved axially for wind-tunnel ultra-expanded section that the embodiment of the present invention provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
See Fig. 1, embodiments provide a kind of fluid pressure drive device moved axially for wind-tunnel ultra-expanded section, it comprises: the head hydraulic cylinder 11 of arranged in series successively, intermediate liquid cylinder pressure 12 and tail washings cylinder pressure 13, first guide rail 2 and the second guide rail.
Particularly, head hydraulic cylinder 11 has cylinder seat and expansion link, its cylinder seat is by the first web member and earth surface, first web member be used for as main hard point bearing head hydraulic cylinder 11, intermediate liquid cylinder pressure 12 and tail washings cylinder pressure 13 produce thrust, its expansion link act on intermediate liquid cylinder pressure 12 with by its force transmission to intermediate liquid cylinder pressure 12.First web member preferably includes the first ear seat 1 and the second ear seat 2, the side (left side of the hydraulic cylinder of head shown in Fig. 1 or the left side of wind-tunnel axis) of head hydraulic cylinder is by the first ear seat 1 and earth surface, and the opposite side (right side of the hydraulic cylinder of head shown in Fig. 1 or the right side of wind-tunnel axis) of head hydraulic cylinder is by the second ear seat 2 and earth surface.In other examples, the first web member can also be other bracing frames.
Intermediate liquid cylinder pressure 12 has cylinder seat and expansion link, and its cylinder seat is arranged on the travelling carriage of the first guide rail by the 3rd web member, with under the thrust of head hydraulic cylinder 11, along providing the first guide rail 2 of guiding to move for intermediate liquid cylinder pressure 12 moves; Its expansion link is connected with the expansion link of tail washings cylinder pressure 13, with by its force transmission to tail washings cylinder pressure.3rd web member preferably includes: third ear seat 3 and the 4th ear seat 4; The side (left side of the cylinder pressure of intermediate liquid shown in Fig. 1 or the left side of wind-tunnel axis) of intermediate liquid cylinder pressure is connected with the travelling carriage 21 on the first guide rail 2 by third ear seat 3, and the opposite side (right side of the cylinder pressure of intermediate liquid shown in Fig. 1 or the right side of wind-tunnel axis) of intermediate liquid cylinder pressure is connected with the travelling carriage 21 on the first guide rail 2 by the 4th ear seat 4.In other examples, the 3rd web member can also be other bracing frames.First guide rail 2 is preferably line slideway.
Tail washings cylinder pressure 13 has cylinder seat and expansion link, and its expansion link is connected with the expansion link of intermediate liquid cylinder pressure 12, to receive the thrust coming from intermediate liquid cylinder pressure 12; Its cylinder seat to be connected with wind-tunnel ultra-expanded section by the second web member and to drive wind-tunnel ultra-expanded section to move under driving in the thrust of intermediate liquid cylinder pressure 12.Second web member preferably includes: the 5th ear seat 5, the 6th ear seat 6 and the 7th ear seat 7; The side (left side of the cylinder pressure of tail washings shown in Fig. 1 or the left side of wind-tunnel axis) of tail washings cylinder pressure 13 is connected with wind-tunnel ultra-expanded section with the 6th ear seat 6 by interconnective 5th ear seat 5, namely wind-tunnel ultra-expanded section is connected with one end of the 5th ear seat 5, the other end of the 5th ear seat 5 is connected with one end of the 6th ear seat 6, and the other end of the 6th ear seat 6 is connected with the side of tail washings cylinder pressure 13; The opposite side (right side of the cylinder pressure of tail washings shown in Fig. 1 or the right side of wind-tunnel axis) of tail washings cylinder pressure is connected with wind-tunnel ultra-expanded section by the 7th ear seat.In other examples, the 3rd web member can also be other bracing frames.
For the ease of the movement of wind-tunnel ultra-expanded section, wind-tunnel ultra-expanded section is arranged on the travelling carriage of the second guide rail, and the second guide rail provides guiding for the movement of wind-tunnel ultra-expanded section.
The embodiment of the present invention additionally provides a kind of hydraulic driving mode based on aforementioned hydraulic drive unit, and it comprises:
When (right side of the right side shown in Fig. 1 or wind-tunnel axis) is mobile forward for wind-tunnel ultra-expanded section need, first hydraulic system gives head hydraulic cylinder 11 oiling, make a hydraulic cylinder 11 be in the state of stretching out to move forward on the first guide rail 2 to promote intermediate liquid cylinder pressure 12, by the power transmission of intermediate liquid cylinder pressure 12, tail washings cylinder pressure 13 and wind-tunnel ultra-expanded section 10 are also moved forward, give intermediate liquid cylinder pressure 12 oiling to promote tail washings cylinder pressure 13 and wind-tunnel ultra-expanded section 10 moves forward right overhead after hydraulic cylinder 11 reaches total travel, promote wind-tunnel ultra-expanded section 10 to after intermediate liquid cylinder pressure 12 reaches total travel tail washings cylinder pressure 13 oiling to continue to move forward,
When (left side of the left side shown in Fig. 1 or wind-tunnel axis) is mobile backward for wind-tunnel ultra-expanded section need, move first to tail washings cylinder pressure 13 oiling backward to promote wind-tunnel ultra-expanded section 10, after tail washings cylinder pressure 13 reaches total travel, give intermediate liquid cylinder pressure 12 oiling to promote tail washings cylinder pressure 13 and wind-tunnel ultra-expanded section 10 is moved backward, after intermediate liquid cylinder pressure 12 reaches total travel, give head hydraulic cylinder 11 oiling to promote intermediate liquid cylinder pressure drive tail washings cylinder pressure and wind-tunnel ultra-expanded section is moved backward.
It should be noted that, be wind-tunnel ultra-expanded section in embodiments of the present invention with apparatus body for example is described, it is not the restriction to the embodiment of the present invention, in other examples, can also be used for mobile other apparatus bodies, such as jet pipe, test section etc.The embodiment of the present invention carrys out driving arrangement body by adopting the serial arrangement of 3 hydraulic cylinders according to different range demands, such as wind-tunnel ultra-expanded section, movement, in other examples, the serial arrangement being greater than 3 hydraulic cylinders can also be adopted, i.e. head hydraulic cylinder, there is the intermediate liquid cylinder pressure group of N number of hydraulic cylinder, tail washings cylinder pressure, the expansion link of head hydraulic cylinder is connected with the cylinder seat of the hydraulic cylinder of first in intermediate liquid cylinder pressure group, the expansion link of the N number of hydraulic cylinder in intermediate liquid cylinder pressure group is connected with the expansion link of tail washings cylinder pressure, expansion link and the cylinder seat of the N number of hydraulic cylinder in intermediate liquid cylinder pressure group are sequentially connected in series, N be more than or equal to 2 natural number.
In sum, the beneficial effect that brings of the embodiment of the present invention is as follows:
Adopt arranged in series to obtain three hydraulic cylinders, and linked together by ear seat and ground, the first guide rail and wind-tunnel ultra-expanded section.According to the oil inlet quantity of the required distance hydraulic control cylinder of wind-tunnel ultra-expanded section movement during use, realize classification and promote wind-tunnel ultra-expanded section, improve ultra-expanded section and move axially distance, ensure that ultra-expanded section displacement requirement, avoid and namely reduce hydraulic cylinder size by the single Hydraulic Cylinder equipment wind-tunnel ultra-expanded section oversize problem of the hydraulic cylinder that causes of moving, replace single hydraulic cylinder to reduce equipment cost by three small size hydraulic cylinders simultaneously, the equipment that reduces installs fixing difficulty, convenient design and operation.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (5)
1., for the fluid pressure drive device that wind-tunnel ultra-expanded section moves axially, described fluid pressure drive device comprises:
Head hydraulic cylinder, the cylinder seat of described head hydraulic cylinder is by the first web member and earth surface;
Intermediate liquid cylinder pressure, the cylinder seat of described intermediate liquid cylinder pressure is connected to move under the driving of head hydraulic cylinder with the expansion link of described head hydraulic cylinder;
Tail washings cylinder pressure, the expansion link of described tail washings cylinder pressure is connected with the expansion link of described intermediate liquid cylinder pressure, and the cylinder seat of described tail washings cylinder pressure is connected under the drive of described intermediate liquid cylinder pressure, drive described wind-tunnel ultra-expanded section to move by the second web member with wind-tunnel ultra-expanded section;
For moving for described intermediate liquid cylinder pressure the first guide rail providing guiding, described first guide rail is provided with travelling carriage, described travelling carriage is connected with described intermediate liquid cylinder pressure by the 3rd web member; And
For for moving the second guide rail providing guiding in described wind-tunnel ultra-expanded section, described second guide rail is connected with described wind-tunnel ultra-expanded section by the travelling carriage of its upper setting.
2. fluid pressure drive device according to claim 1, is characterized in that, described first web member comprises the first ear seat and the second ear seat;
The side of described head hydraulic cylinder is by described first ear seat and earth surface, and the opposite side of described head hydraulic cylinder is by described second ear seat and earth surface.
3. fluid pressure drive device according to claim 1, is characterized in that, described second web member comprises: the 5th ear seat, the 6th ear seat and the 7th ear seat;
The side of described tail washings cylinder pressure is connected with described wind-tunnel ultra-expanded section with described 6th ear seat by interconnective described 5th ear seat, and the opposite side of described tail washings cylinder pressure is connected with described wind-tunnel ultra-expanded section by described 7th ear seat.
4. fluid pressure drive device according to claim 1, is characterized in that, described 3rd web member comprises: third ear seat and the 4th ear seat;
The side of described intermediate liquid cylinder pressure is connected with the travelling carriage on described first guide rail by described third ear seat, and the opposite side of described intermediate liquid cylinder pressure is connected with the travelling carriage on described first guide rail by described 4th ear seat.
5., based on a hydraulic driving mode for the fluid pressure drive device moved axially for wind-tunnel ultra-expanded section described in claim arbitrary in claim 1-4, it is characterized in that, described hydraulic driving mode comprises:
When wind-tunnel ultra-expanded section need move forward, first the oiling of described head hydraulic cylinder is given, make described head hydraulic cylinder be in the state of stretching out to move forward on described first guide rail to promote described intermediate liquid cylinder pressure, by the power transmission of described intermediate liquid cylinder pressure, described tail washings cylinder pressure and wind-tunnel ultra-expanded section are also moved forward, after described head hydraulic cylinder reaches total travel, give the oiling of described intermediate liquid cylinder pressure to promote described tail washings cylinder pressure and wind-tunnel ultra-expanded section moves forward, promote described wind-tunnel ultra-expanded section to after described intermediate liquid cylinder pressure reaches total travel the oiling of described tail washings cylinder pressure and move forward;
When wind-tunnel ultra-expanded section need be moved backward, move first to the oiling of described tail washings cylinder pressure backward to promote described wind-tunnel ultra-expanded section, after described tail washings cylinder pressure reaches total travel, give the oiling of described intermediate liquid cylinder pressure to promote described tail washings cylinder pressure and wind-tunnel ultra-expanded section is moved backward, move to promote described wind-tunnel ultra-expanded section to after described intermediate liquid cylinder pressure reaches total travel the oiling of described head hydraulic cylinder backward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410554973.XA CN104458194B (en) | 2014-10-17 | 2014-10-17 | Fluid pressure drive device for the axial movement of wind-tunnel ultra-expanded section and its mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410554973.XA CN104458194B (en) | 2014-10-17 | 2014-10-17 | Fluid pressure drive device for the axial movement of wind-tunnel ultra-expanded section and its mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104458194A true CN104458194A (en) | 2015-03-25 |
| CN104458194B CN104458194B (en) | 2017-03-01 |
Family
ID=52904612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410554973.XA Expired - Fee Related CN104458194B (en) | 2014-10-17 | 2014-10-17 | Fluid pressure drive device for the axial movement of wind-tunnel ultra-expanded section and its mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104458194B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132132A (en) * | 2017-12-22 | 2018-06-08 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of High Speed Train Models wind tunnel test standard roadbed |
| CN113978490A (en) * | 2021-11-01 | 2022-01-28 | 山东省公路桥梁建设集团有限公司 | Double-hydraulic-cylinder rail transportation equipment and use method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000028474A (en) * | 1998-07-14 | 2000-01-28 | Ishikawajima Harima Heavy Ind Co Ltd | Stabilization structure for operation of supersonic diffuser |
| RU2381472C1 (en) * | 2008-08-01 | 2010-02-10 | Российская Федерация, от имени которой выступает государственный заказчик Министерство промышленности и торговли Российской Федерации (Минпромторг России) | Method for testing of pulsating detonating engine and aerodynamic installation for its realisation |
| CN201772990U (en) * | 2010-04-29 | 2011-03-23 | 中国空气动力研究与发展中心高速空气动力研究所 | Low-blocking-degree independent six-degree of freedom movement device for captive trajectory experiment system |
| CN201983918U (en) * | 2011-03-22 | 2011-09-21 | 中国人民解放军国防科学技术大学 | Retractable diffuser for supersonic wind tunnel |
| CN103135624A (en) * | 2012-12-19 | 2013-06-05 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for controlling temporary flush type supersonic velocity wind tunnel with ejector function |
| CN203310605U (en) * | 2013-06-25 | 2013-11-27 | 中国航天空气动力技术研究院 | Lifting mechanism |
| CN203688195U (en) * | 2013-12-19 | 2014-07-02 | 中国航天空气动力技术研究院 | Supersonic velocity diffusion device with active injection |
-
2014
- 2014-10-17 CN CN201410554973.XA patent/CN104458194B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000028474A (en) * | 1998-07-14 | 2000-01-28 | Ishikawajima Harima Heavy Ind Co Ltd | Stabilization structure for operation of supersonic diffuser |
| RU2381472C1 (en) * | 2008-08-01 | 2010-02-10 | Российская Федерация, от имени которой выступает государственный заказчик Министерство промышленности и торговли Российской Федерации (Минпромторг России) | Method for testing of pulsating detonating engine and aerodynamic installation for its realisation |
| CN201772990U (en) * | 2010-04-29 | 2011-03-23 | 中国空气动力研究与发展中心高速空气动力研究所 | Low-blocking-degree independent six-degree of freedom movement device for captive trajectory experiment system |
| CN201983918U (en) * | 2011-03-22 | 2011-09-21 | 中国人民解放军国防科学技术大学 | Retractable diffuser for supersonic wind tunnel |
| CN103135624A (en) * | 2012-12-19 | 2013-06-05 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for controlling temporary flush type supersonic velocity wind tunnel with ejector function |
| CN203310605U (en) * | 2013-06-25 | 2013-11-27 | 中国航天空气动力技术研究院 | Lifting mechanism |
| CN203688195U (en) * | 2013-12-19 | 2014-07-02 | 中国航天空气动力技术研究院 | Supersonic velocity diffusion device with active injection |
Non-Patent Citations (3)
| Title |
|---|
| 李尚春 等: "1.2m 跨超声速风洞超扩段栅指控制系统", 《流体力学实验与测量》 * |
| 虞择斌 等: "2m超声速风洞总体结构设计", 《实验流体力学》 * |
| 褚卫华 等: "2ｍ×２ｍ超声速风洞流场控制策略研究与实现", 《实验流体力学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132132A (en) * | 2017-12-22 | 2018-06-08 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of High Speed Train Models wind tunnel test standard roadbed |
| CN113978490A (en) * | 2021-11-01 | 2022-01-28 | 山东省公路桥梁建设集团有限公司 | Double-hydraulic-cylinder rail transportation equipment and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104458194B (en) | 2017-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105628411B (en) | A kind of rigid flight refuelled system Three Degree Of Freedom translational motion analogue means | |
| CN206243212U (en) | A kind of tractor for carrying prospecting ancient architecture foundation GPR | |
| CN202243546U (en) | Single-rail-hanger pneumatic switch | |
| CN204025902U (en) | Installation chassis is drawn in heavy caliber PCCP hydraulic pressure | |
| CN104030205A (en) | Walking type thrustor based on rolling and sliding friction | |
| CN102926659A (en) | Train-type automatic translational device for drill | |
| CN105134059A (en) | Novel telescopic translation door | |
| CN104458194A (en) | Hydraulic drive device and mode for axial movement of wind tunnel super expansion segment | |
| CN103790525A (en) | Oil cylinder lifting type drilling rig power catwalk | |
| CN103574159B (en) | A kind of pipeline pusher | |
| CN204198985U (en) | Woof-laying of multiple spindle warp knitting machine device | |
| CN104044998A (en) | Monorail crane travelling mechanism hydraulic system for double-braking mine | |
| CN104790886A (en) | Transverse pipe conveying device driven by electric cylinder | |
| CN204703951U (en) | Shield machine subway misses the stop push unit | |
| CN106323783A (en) | Machine for testing wear resistance of composite flexible pipes | |
| CN103101556A (en) | Universal pin tooth car pusher | |
| CN105291264A (en) | Auxiliary lifting landing leg, lifting method and engineering machine | |
| CN103787246B (en) | Bidirectional hydraulic push-pull device at fixed | |
| CN205151653U (en) | Panel automatic lifting device | |
| CN208918474U (en) | Multidirectional-moving device for oil-well rig module | |
| CN102829247B (en) | Multi-stage conveying system and high-altitude operation engineering machinery | |
| CN203249822U (en) | Pipe moving device | |
| CN202866654U (en) | Train type automatic translating device for drilling machine | |
| CN203496464U (en) | Supporting and transmission structure for 3D printer heating plate | |
| CN201604997U (en) | Bilateral automatic tail moving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170301 Termination date: 20211017 |