CN102052258B - Safety film - Google Patents
Safety film Download PDFInfo
- Publication number
- CN102052258B CN102052258B CN200910217188.4A CN200910217188A CN102052258B CN 102052258 B CN102052258 B CN 102052258B CN 200910217188 A CN200910217188 A CN 200910217188A CN 102052258 B CN102052258 B CN 102052258B
- Authority
- CN
- China
- Prior art keywords
- rupture disk
- tower cylinder
- edge
- central part
- internal surface
- 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.)
- Expired - Fee Related
Links
- 238000005452 bending Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 10
- 241000628997 Flos Species 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- -1 Kev draw Substances 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- Y02E10/722—
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention relates to a tower barrel of a wind power generation device. The tower barrel comprises a wall which extends upwards from a foundation towards a cabin and defines an enclosed space. Moreover, the tower barrel also comprises a safety film which is unfolded across the inside of the tower barrel along the inner surface of the wall; the enclosed space is partitioned into an upper compartment which is positioned above the safety film and a lower compartment which is positioned below the safety film; and the safety film is flexible.
Description
Technical field
The present invention relates to a kind of rupture disk launching and a kind of method of launching rupture disk in the tower cylinder of wind generating unit.
Background technique
The vitals of wind turbine, for example rotor, rotor shaft, transmission device and generator are all arranged in the cabin being above the ground level.This cabin is conventionally about the tower cylinder of 100 meters and is kept.But for more large-scale wind turbine, the height of tower cylinder can reach 150-200 rice.Tower cylinder is made up of steel or concrete hollow cylindrical shell-like structure conventionally.Thereby the wall of tower cylinder defines an inner space, this inner space is formed into the gateway in cabin.
The maintenance of wind turbine be included in work in the cabin on tower cylinder and being usually located in tower cylinder space, be for example positioned at the work on the various electronic equipments of tower cylinder substrate.Therefore staff works at the different heights place of tower barrel structure, thereby, may have an accident because of the object falling, under the worst situation, staff even can be injured owing to falling.
Traditionally, in tower cylinder, be provided with one or more platforms, so that staff can carry out the work at the different heights place in tower cylinder, for example, two tower cylinder elements be connected to each other.These platforms are solid and are made up of for example wood or aluminium.These platforms can also be collected the object falling from above.But, show, be difficult to platform closely install and protect thus staff not to be subject to the injury of the smallclothes object falling along this internal surface along the internal surface of tower barrel.In addition,, if just in case there is accident, staff falls or when in the time that the higher height of tower cylinder is worked, this platform is very not applicable from ladder.
Summary of the invention
An object of embodiments of the invention is to provide a kind of for tower cylinder (pylon) wind generating unit, that have rupture disk (safe felt, safety blanket), and a kind of method of launching this rupture disk.
Therefore, in first aspect, the invention provides a kind of tower cylinder for wind generating unit, this tower cylinder comprises wall, this wall extends towards cabin in the upward direction and limits an enclosed space from ground, and wherein this tower cylinder also comprises rupture disk, and this rupture disk launches across tower cylinder is inner along the internal surface of this wall, thereby this enclosed space is divided into the upper compartment that is positioned at rupture disk top and the lower compartment that is positioned at rupture disk below, and wherein this rupture disk is flexible.
Certain altitude place that can be above the base plate of wind turbine tower cylinder launches rupture disk, to protect the staff in the lower compartment of tower cylinder not injured by the object that compartment falls from tower cylinder.
This tower cylinder can consist of steel or concrete hollow cylindrical shell-like structure, or can be grid tower cylinder.But, should be appreciated that the type of tower cylinder does not limit for the present invention, because rupture disk can launch across tower cylinder is inner along the internal surface of any tower cylinder.
Rupture disk can have the shape corresponding to the cross section of the basic horizontal of tower cylinder, that is to say, the in the situation that of circular tower cylinder, rupture disk can be circular substantially, and this rupture disk can be square etc. substantially in the situation that of quadrilateral tower cylinder.But, should be appreciated that along the edge of rupture disk and can there is otch.
By the enclosed space of tower cylinder is divided into upper compartment and lower compartment, this rupture disk can be used as the top of lower compartment, and protects thus staff in lower compartment not to be subject to fall from upper compartment the injury of fallen object.
For the ease of launching rupture disk along internal surface across tower cylinder inside, this rupture disk is flexible.In addition, this internal surface can be provided with hook, guide rail or similar structure, so that this rupture disk can be tied on wall or be tied on the framework of internal surface.
At this, flexible means safe film can fold and reopen.In addition, this rupture disk can stretch, and in the time having thing to hit rupture disk-in the time having object to fall from above, this rupture disk can be bending.
Should be appreciated that owing to can launching at various height rupture disk, so can be along internal surface across the multiple rupture disks of the inner expansion of tower cylinder.In addition, one or more rupture disks can be combined with one or more conventional platforms of being made up of aluminium, wood or other similar material, thereby also make one or more entity platforms can be arranged in tower cylinder inside.In the time that in tower cylinder, different heights place carries out the work, these entity platforms also can be used as working platform.
For rupture disk is launched completely, need to pull out the edge of this film, for example use rubber tape, wire, outer cover (robe), spring or similar structure, structure that preferably can elastic stretch.
The edge that rupture disk can comprise central part and circumferentially extend around central part.The bending hardness at this edge is greater than the bending hardness of central part.
Central part can be made up of one or more in following material: nylon, and plastics, other composite, Kev draws (Kevlar), carbon fiber, steel wire, fishing net, tarpaulin etc.In one embodiment, central part only comprises a layer, and in another embodiment, this central part sandwich structure that one or more materials are made of serving as reasons partially or completely.
Edge can be made to the bending hardness that makes its bending hardness be greater than central part.This can by select for this edge a kind of have compared with the material of macrobending hardness realize, or these materials jointly have the bending hardness that is greater than central part bending hardness and realize by this edge is made of a variety of materials.In one embodiment, this reaches by the sandwich structure that edge is configured to different materials.
Should be appreciated that at this, larger bending hardness refers to that the flexibility at edge is lower than central part.By having larger bending hardness, this edge can more closely be installed along the internal surface of tower barrel, thereby and can also protect staff not to be subject to fall along internal surface from top the injury of fallen smallclothes object.
If the size of rupture disk is less than the cross section of the tower cylinder at the position that it launches-be called hereinafter " tower cylinder cross section ", will cause thering is gap between tower barrel and film.On the other hand, if rupture disk is made identical with the size and dimension of tower cylinder cross section, can cause being difficult to launch completely this rupture disk, unless pulled this rupture disk in the position that there is certain distance with the edge of this rupture disk towards tower barrel.
Therefore, for strengthen the expansion service of rupture disk and reduce tower barrel and the edge of rupture disk between gap, provide along this edge but the tie point that departs from this edge certain distance setting is favourable.This distance is known as " skew " hereinafter.
But this skew may cause the part between tower barrel and tie point of rupture disk to bend downwards, does not particularly have at edge-for example in the case of between tie point-wire that this rupture disk is connected with tower barrel or dustcoat support.
For less skew being provided and preventing that edge from bending downwards, can make this edge there is the bending hardness larger than the central part of rupture disk.
It is the basic parts from supporting that the bending hardness at edge can be large enough to this edge of sufficient to guarantee.Thereby in the time this rupture disk being installed along the internal surface of tower barrel, do not need to support this edge.
In one embodiment, rupture disk launches along outside direction by fixed structure inward faces, and this fixed structure acts on this rupture disk at the multiple positions between central part and edge.That is to say, in this embodiment, the size at edge is corresponding to this offset distance.In alternate embodiment, the part of this fixed structure on can position, central part on edge or the position effect on the two.
This fixed structure can comprise the rope that can extend by resiliently deformable.This rope can circumferentially extend around central part.This rope is suitable for pulling out the edge of rupture disk, and can comprise for example rubber tape, wire, dustcoat, spring or similar structure.This fixed structure also can comprise along the internal surface of wall or be in along hook, guide rail or similar structure on the framework of internal surface.
Due to rope can be on rupture disk tie point and along the internal surface of wall or be between hook, guide rail or the similar structure on framework and pass in and out and pass, this edge can circumferentially extend around at least a portion of this rope.
In one embodiment, rope can remain on this internal surface by a structure that rigidly fixes that is fixed on internal surface.This rigidly fixes structure can comprise hook, guide rail, ring and similar structure.Alternately, similarly rigidly fix structure and can be fixed on a framework, this framework is connected on internal surface or along internal surface setting.
This edge can have the stratiform structure of the layer that comprises different materials.One in these layers can comprise foamed material.
Central part can comprise non-woven sheet material.Alternatively and additionally, central part can comprise braided material.Suitable material can be that nylon, plastics, other composite, Kev draw, carbon fiber, tarpaulin etc.This sheet material can be strengthened by for example steel wire, the structure that is similar to fishing net or other similar structure.
For the ease of the expansion of rupture disk, the shape of this rupture disk can have high initial stability, and the shape of this film is not easy to change.By having high initial stability, each film all can be designed to be suitable for particular column cylinder, has the size and shape corresponding with the tower cylinder cross section of this particular column cylinder, thereby is convenient to the expansion of this film.
This edge can end at along the circumferential edge around this rupture disk.Distance between this edge and this internal surface can be less than film girth 1%.In one embodiment, this distance is below 20 millimeters.
This film can comprise one or more otch along edge, and described otch forms passage between film and wall.The size of these otch can be designed so that they also cut central part.Even if these otch are located so that laying this rupture disk of ladder at the internal surface of tower cylinder also can launch, this is because the size of otch can be corresponding to the position of ladder corresponding to the position of the size of ladder and otch.The size of otch even can be even as big as allowing people to climb on ladder at this rupture disk when the internal surface of tower cylinder launches.
Assemble on the film launching for anti-sealing, oil or other flowing medium, this central part can comprise the floss hole that at least one allows flowing medium to discharge between upper and lower compartment.In addition, described floss hole can reduce the pressure difference between upper and lower compartment.
In second aspect, the internal surface that the invention provides a kind of wall of the tower cylinder along wind generating unit launches the method for rupture disk across tower cylinder inside, the method comprises the following steps: the film of a flexibility is provided, and the fixed structure that acts on the position on film by use makes this film stretch towards this internal surface along outside direction.
The edge that this film can comprise central part and circumferentially extend around this central part, the bending hardness at this edge can be greater than the bending hardness of central part.The method also can comprise by using the position between central part and edge to act on the step that the fixed structure on film makes this film stretch towards this internal surface along outside direction.
Be appreciated that this expansion film method can with using together with the tower cylinder of wind generating unit according to above-described first aspect present invention.Thereby the feature of a first aspect of the present invention is applicable to the method for the expansion rupture disk of a second aspect of the present invention.
Brief description of the drawings
With reference now to accompanying drawing, further describe embodiments of the invention, in the accompanying drawings:
How Fig. 1-6 illustrate that internal surface along the tower barrel of wind generating unit is across the inner different embodiments that launch rupture disk of this tower cylinder,
Fig. 7 illustrates the details at an embodiment's of rupture disk edge,
Fig. 8 illustrates how to launch rupture disk along the internal surface of wind turbine wall,
Fig. 9 illustrates a part for the rupture disk of seeing from below, and
Figure 10 illustrates the rupture disk of seeing from above.
Embodiment
Fig. 1 illustrates the part for the tower cylinder of wind generating unit.This tower cylinder comprises the wall 1 extending towards cabin (not shown) in the upward direction from ground (not shown).This tower barrel 1 defines the space of a sealing.This tower cylinder also comprises rupture disk 2, and this rupture disk launches across tower cylinder is inner along the internal surface 3 of wall 1, thus the space of this sealing is divided into the upper compartment 4 being positioned on this rupture disk 2 and is positioned at the lower compartment 5 under this rupture disk 2.This rupture disk 2 is flexible.
Rupture disk 2 comprises central part 6 and the edge 7 around the circumferential extension of this central part 6.The bending hardness at this edge 7 is greater than the bending hardness of this central part 6.
Rupture disk 2 stretches towards internal surface 3 along outside direction by fixed structure 8, and this fixed structure 8 acts on this rupture disk 2 at multiple positions of central part.
In shown example, fixed structure 8 comprises the rope 9 that can extend by resiliently deformable.This rope 9 circumferentially extends around central part 6.
Fixed structure 8 also comprises the ring 10 of multiple bottom sides that are connected in rupture disk 2.Between the tie point of rope 9 on rupture disk 2, penetrate and pass, described tie point encircles 10 and rigidly fix structure 11, and this rigidly fixes structure 11 for being fixed on the multiple hooks on the internal surface 3 of tower barrel 11 in this example.
Because hook 11 is connected on magnet 12, and this magnet is fixed on the internal surface 3 of tower barrel 1, and therefore described hook 11 is fixed on internal surface 3 by magnetic force.
Fig. 2 illustrates an a kind of part of alternate embodiment, and wherein hook 11 is by being welded to connect the internal surface 3 in tower barrel 1.
Fig. 3 illustrates a part for another alternate embodiment, and wherein fixed structure 11 comprises flange.This flange 11 is by being welded to connect the internal surface 3 in tower barrel 1.
How Fig. 4 illustrates that internal surface 3 along the tower barrel 1 of wind generating unit is across inner the 4th embodiment who launches rupture disk 2 of this tower cylinder.Rupture disk (not shown) is by using circular iron 12 and multiple flat rod 13 that is welded in internal surface to launch.By rope (not shown), rupture disk (not shown) is stretched along outside direction inward faces 3, this rope can extend by resiliently deformable.This rope circumferentially extends around central part (not shown), and penetrates and pass between multiple tie points on circular iron 12 and rupture disk.
Fig. 5 illustrates the 5th embodiment, and the frame structure 14 that wherein has multiple supporting legs 15 by use makes rupture disk 2 launch across tower cylinder is inner along the internal surface (not shown) of the tower barrel (not shown) of wind generating unit.
Rupture disk 2 is connected in the frame structure 14 that contiguous tower barrel (not shown) arranges.This rupture disk 2 comprises the otch 16 along edge, and described otch forms the passage between rupture disk 2 and wall.This otch being dimensioned in the present embodiment makes it to cut central part 6.Even if this otch 16 is located so that, at the internal surface of tower cylinder (not shown), ladder (not shown) is installed, rupture disk 2 also can launch.The size of otch is even as big as allowing staff's climbing ladder when rupture disk 2 launches along internal surface (not shown).
Although should be appreciated that not shownly, also can in the embodiment of the rupture disk of Fig. 1-4 2, form otch.
Fig. 6 illustrates the 6th embodiment, and wherein rupture disk 2 is by using suspension structures 17 to install.This suspension structures 17 can for example be connected in the main frame at tower cylinder top or be connected in the entity platform being positioned on rupture disk.Can also make otherwise to connect rupture disk.
Fig. 7 illustrates the details at an embodiment's of the rupture disk 2 launching along the internal surface 3 of tower barrel 1 edge 7.Rope 9 circumferentially extends around central part 6.Between the tie point of this rope 9 on rupture disk 2, penetrate and pass, described tie point encircles 10 and be fixed on multiple hooks 11 of internal surface 3 of tower barrel 1.Described hook 11 is by being welded to connect the internal surface 3 in tower barrel 1.
Shown edge 7 has the stratiform structure that comprises different material layer, and wherein one deck is foamed material 18.This foamed material 18 by such as nylon, plastics, other composite, Kev draw, the sheet material institute of carbon fiber, tarpaulin etc. around.
Fig. 8 illustrates rupture disk 2 is how to launch across tower cylinder is inner along the internal surface 3 of wind turbine wall 1.In shown embodiment, rupture disk 2 does not launch completely.Rope 9 circumferentially extends around the central part 6 of this rupture disk 2.The multiple tie points of this rope 9 on rupture disk 2-the be ring 10 of rupture disk 2 bottoms and the multiple hooks 11 that are fixed on the internal surface 3 of tower barrel 1-between penetrate and pass.
Rupture disk 2 comprises the otch 16 along edge 7, and described otch forms passage between rupture disk 2 and wall 1.This otch 16 being dimensioned in the present embodiment makes it to cut central part 6.Even if otch 16 is located so that when rupture disk 2 is laid ladder 19 at internal surface 3 places of tower barrel 1 also can launch.
Fig. 9 illustrates a part for the rupture disk 2 of seeing from below, and Figure 10 illustrates the rupture disk 2 of seeing from above.Rope 9 circumferentially extends around the central part 6 of rupture disk 2.This rope 9 is at ring 10 and be fixed between multiple hooks 11 of internal surface 3 of tower barrel 1 and penetrate and pass.
Figure 10 illustrates three floss holes 20.These floss holes 20 can limit or even anti-sealing, oil or other flowing medium are assembled on the rupture disk 2 launching, and this is because these floss holes allow flowing medium to discharge between upper and lower compartment 4,5.In addition, floss hole 20 can reduce the pressure difference between upper and lower compartment 4,5.
Rupture disk 2 comprises along edge 7 to form the otch 16 of passage between this rupture disk 2 and wall 1.The size of this otch 16 is corresponding with the ladder 19 at internal surface 3 places that is placed in tower barrel 1.The size of another otch 21 is corresponding to the lift (not shown) being placed in tower cylinder.Lift region and the ladder region at tower cylinder bottom place are restricted area, and no one is injured when having object to fall in these regions of box lunch.
Claims (15)
1. the tower cylinder for wind generating unit, this tower cylinder comprises the wall that extends and limit in the upward direction an enclosed space from ground towards cabin, wherein this tower cylinder also comprises rupture disk, this rupture disk launches across tower cylinder is inner along the internal surface of this wall, thus this enclosed space is divided into the upper compartment that is positioned at rupture disk top and the lower compartment that is positioned at rupture disk below, wherein, this rupture disk is flexible, it is characterized in that, the edge that this rupture disk comprises central part and circumferentially extends around this central part, and wherein the bending hardness at this edge is greater than the bending hardness of this central part.
2. according to the tower cylinder of claim 1, it is characterized in that, this edge of bending hardness sufficient to guarantee at this edge is the basic parts from supporting.
3. according to the tower cylinder of claim 1, it is characterized in that, this rupture disk stretches towards this internal surface along outside direction by fixed structure, and this fixed structure acts on this rupture disk at the position between central part and edge.
4. according to the tower cylinder of claim 3, it is characterized in that, this fixed structure comprises the rope that can extend by resiliently deformable, and this rope circumferentially stretches around this central part.
5. according to the tower cylinder of claim 4, it is characterized in that, this edge circumferentially extends around at least a portion of this rope.
6. according to the tower cylinder of claim 4, it is characterized in that, this rope remains on this internal surface by rigidly fixing structure, and this rigidly fixes structure and is fixed on this internal surface.
7. according to the tower cylinder of claim 1, it is characterized in that, this edge has stratiform structure, the layer that this stratiform structure comprises different materials.
8. according to the tower cylinder of claim 7, it is characterized in that, one of described layer comprises foamed material.
9. according to the tower cylinder of claim 1, it is characterized in that, this central part comprises non-woven sheet material.
10. according to the tower cylinder of claim l, it is characterized in that, the shape of this rupture disk has high initial stability.
11. according to the tower cylinder of claim l, it is characterized in that, this edge ends at one circumferentially around the edge of this rupture disk, the distance between this edge and this internal surface be less than rupture disk girth 1%.
12. according to the tower cylinder of claim 11, it is characterized in that, this distance is below 20 millimeters.
13. according to the tower cylinder of claim 1, it is characterized in that, this rupture disk comprises one or more otch along this edge, and described otch forms passage between this rupture disk and this wall.
14. according to the tower cylinder of claim 1, it is characterized in that, this central part comprises at least one floss hole, to allow flowing medium to discharge between upper and lower compartment.
15. 1 kinds of internal surfaces along the wall of the tower cylinder for wind generating unit are across the inner method of launching rupture disk of tower cylinder, the method comprises the following steps: a flexible membrane is provided, by using fixed structure that this film is stretched towards this internal surface along outside direction, this fixed structure acts on this film, wherein, the edge that this film comprises central part and circumferentially extends around this central part, and wherein the bending hardness at this edge is greater than the bending hardness of this central part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910217188.4A CN102052258B (en) | 2009-11-02 | 2009-11-02 | Safety film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910217188.4A CN102052258B (en) | 2009-11-02 | 2009-11-02 | Safety film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102052258A CN102052258A (en) | 2011-05-11 |
| CN102052258B true CN102052258B (en) | 2014-11-05 |
Family
ID=43956922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910217188.4A Expired - Fee Related CN102052258B (en) | 2009-11-02 | 2009-11-02 | Safety film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102052258B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527424B (en) * | 2013-10-25 | 2016-08-31 | 北京金风科创风电设备有限公司 | Precast concrete tower of wind generating set |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621620A (en) * | 2004-12-21 | 2005-06-01 | 昆明铁路局科学技术研究所 | Rock-fall proof method and pulled guiding rock-fall proof flexible mesh |
| CN2849042Y (en) * | 2005-11-08 | 2006-12-20 | 杭州善庆金属构件有限公司 | Safety type single tube tower |
| CN201165943Y (en) * | 2008-02-01 | 2008-12-17 | 北京能高自动化技术有限公司 | Safe platform in large-scale blower fan tower barrel |
| CN201212256Y (en) * | 2008-06-16 | 2009-03-25 | 中建五局第三建设有限公司 | Safety flat net for construction of elevator shaft |
-
2009
- 2009-11-02 CN CN200910217188.4A patent/CN102052258B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621620A (en) * | 2004-12-21 | 2005-06-01 | 昆明铁路局科学技术研究所 | Rock-fall proof method and pulled guiding rock-fall proof flexible mesh |
| CN2849042Y (en) * | 2005-11-08 | 2006-12-20 | 杭州善庆金属构件有限公司 | Safety type single tube tower |
| CN201165943Y (en) * | 2008-02-01 | 2008-12-17 | 北京能高自动化技术有限公司 | Safe platform in large-scale blower fan tower barrel |
| CN201212256Y (en) * | 2008-06-16 | 2009-03-25 | 中建五局第三建设有限公司 | Safety flat net for construction of elevator shaft |
Non-Patent Citations (2)
| Title |
|---|
| JP特开平5－295898A 1993.11.09 * |
| JP特开平9－278363A 1997.10.28 * |
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| Publication number | Publication date |
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| CN102052258A (en) | 2011-05-11 |
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Granted publication date: 20141105 |