CN108969918A - Escape equipment for wind generating set and wind generating set - Google Patents
Escape equipment for wind generating set and wind generating set Download PDFInfo
- Publication number
- CN108969918A CN108969918A CN201811014386.6A CN201811014386A CN108969918A CN 108969918 A CN108969918 A CN 108969918A CN 201811014386 A CN201811014386 A CN 201811014386A CN 108969918 A CN108969918 A CN 108969918A
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- Prior art keywords
- rope
- tower
- escape
- escaping
- generating set
- 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.)
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Links
- 230000004083 survival effect Effects 0.000 claims description 44
- 230000007423 decrease Effects 0.000 claims description 11
- 230000001012 protector Effects 0.000 claims description 6
- 239000004922 lacquer Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 10
- 230000006378 damage Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 10
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 206010042772 syncope Diseases 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B1/00—Devices for lowering persons from buildings or the like
- A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
- A62B1/16—Life-saving ropes or belts
Abstract
The embodiment of the invention provides escape equipment for a wind generating set and the wind generating set. The escape apparatus includes: escape ropes and rope releasing devices; the escape rope can be sleeved on the outer wall of a tower barrel of the wind generating set, and the rope release device is connected with the escape rope and used for tightening the escape rope to the outer wall of the tower barrel and controlling the release speed of the escape rope. The escape equipment for the wind generating set is simple in structure; the escape equipment is supported by the tower barrel in the process of fast descending, so that the psychological burden of escape personnel is greatly reduced; the escape route of the escape equipment is relatively determined, and other additional damage caused by swinging can be avoided.
Description
Technical field
The present invention relates to wind generating technology more particularly to the survival equipments and wind-driven generator of a kind of wind power generating set
Group.
Background technique
Wind power generating set is mainly upright tall and slender structure, is mainly made of tower, cabin and impeller three parts.With
The tower height of the development that deepens continuously of wind generating technology, wind-driven generator is higher and higher, brings emergency escape immediately and gets over
Come the case where being more difficult to realize.
Traditional escape mode is the engine room inside setting rapidly descending escape equipment in wind power generating set (abbreviation unit), is escaped
It bears mouth and is located at cabin tail portion, shared with hanging object hole.Operation maintenance personnel need to be inside unit by rapidly descending escape when human behavior reaction occurs
Equipment is hung on fixed safe hanging point, is led to after the other end of the rapidly descending escape equipment and escape personnel's safely assembled are fixed
Above-mentioned escape opening rapid descent is crossed to ground.
Inventor has found that there are following deficiencies for prior art in the implementation of the present invention:
Escape personnel is in suspension point after being detached from cabin during prior art escape, very with ground distance
Far, very big psychological burden is caused to escape personnel.
Escape process path can not perfect forecast, be unable to accurately control best-effort path when encountering strong wind and Thunderstorm Weather,
In the case of especially meeting with larger fitful wind, escape personnel is easy to be blown to unforeseen direction, is easy to collide with tower
Lead to high-altitude syncope or hits blade.Such situation apart from the nearlyr escape safety rope in ground release length it is longer in the case where
More it is easy to happen.
Summary of the invention
It is an object of the present invention to provide a kind of survival equipment and escape method for wind power generating set, with
Minimize influence and burden that escape scheme in the process of implementation generates the psychology of escape personnel.
The second object of the present invention is, provides a kind of survival equipment and escape method for wind power generating set, with
It realizes the best-effort path being expected, further decreases the uncontrollability of escape process.
In a first aspect, this hair provides a kind of survival equipment for wind power generating set comprising: escaping rope and rope
Rope release device；The escaping rope can be sheathed on the outer wall of the tower of wind power generating set, the rope release device with
The escaping rope connection, for the escaping rope to be tightened to the outer wall of the tower, and controls the escaping rope
Rate of release.
Optionally, the limiting section of one or more idler wheels and the idler wheel is provided on the escaping rope.
Optionally, the limiting section of the idler wheel includes the knot positioned at the idler wheel both ends；The quantity of the idler wheel according to
The excircle diameter of the tower segment of the tower top is configured.
Optionally, described escaping rope one end is fixed with the rope release device, and the other end is discharged across the rope
The escaping rope is controlled by escape personnel after the rope withdrawing apparatus of device and carries out slow release.
Optionally, the rope withdrawing apparatus is decline protector, is escaped described in the escaping rope loosening and control for limiting
The rate of release of raw rope.
Optionally, the escaping rope is made of wear-resistant material, and outer surface, which has, is capable of providing default frictional force
Lacquer painting.
Optionally, the escaping rope is distributed at least two rope release devices around tower even circumferential.
Optionally, the rope release device includes: rope release device main body, multiple wheels, 8 word rings；Described is more
A wheel and the 8 word ring are installed in the rope release device main body, and the rope release device main body is escaped with described
The fixing end of raw rope is fixedly connected, and release end or the crimped end winding of the escaping rope pass through the 8 word ring, 8 word
Ring limits the escaping rope, and controls the rate of release of the escaping rope.
Second aspect, the present invention provides a kind of wind power generating sets comprising above-mentioned to be used for described in any one
The survival equipment of wind power generating set.
The survival equipment is formed on tower top in advance, is strapped on the outer wall of the tower, and is located at engine room cover bottom surface
In space between yaw system, the engine room cover bottom surface is prefabricated with escape hole around a circle of the tower.
Optionally, the survival equipment is provided with multiple on the outer wall of the tower；The tower includes multiple towers
Section, each tower segments are the cylindrical tower segments of zero draft, alternatively, each tower segments are the tower that appearance has certain taper
Section.
Optionally, be additionally provided with safety rope in the cabin, connect with the safety clothes --- with reflecting parts on clothes of escape personnel, the safety clothes --- with reflecting parts on clothes with
Secure latch on the survival equipment is mutually fixed.
The survival equipment and wind power generating set of the wind power generating set provided according to embodiments of the present invention, have has as follows
The technical effect of benefit:
The survival equipment structure for being used for wind power generating set is simple；
The survival equipment is to rely on tower during prompt drop, greatly reduces the psychological burden of escape personnel；
The best-effort path of the survival equipment determines relatively, other additional damages will not be caused because of swing.
Detailed description of the invention
Figure 1A is escaping rope structure diagram according to an embodiment of the present invention；
Figure 1B is the partial enlargement structure diagram of escaping rope according to an embodiment of the present invention；
Fig. 2 is rope release device schematic diagram according to an embodiment of the present invention；
Fig. 3 is that the survival equipment of the embodiment of the present invention is applied to the illustrative diagram of wind power generating set；
Fig. 4 is the schematic diagram for showing survival equipment according to an embodiment of the present invention and carrying out more people's escapes；
Fig. 5 is the detailed construction schematic diagram of the rope release device of the embodiment of the present invention.
Drawing reference numeral explanation:
10- escaping rope, 12- rope ontology, 14- idler wheel, 16- knot, the fixing end of 10a- escaping rope, 10b- escape
The release end or crimped end of rope,
20- rope release device, 201- rope release device main body, 202- wheel, 203-8 word ring, 204- rope closing bag,
205- secure latch,
30- tower, 40- engine room cover, 42- engine room cover bottom surface, 44- escape hole,
50- yaw system, 60- engineroom flat.
Specific embodiment
The survival equipment for wind power generating set of the embodiment of the present invention can reduce escape scheme in implementation procedure
In to escape personnel psychology generate influence and burden；It realizes the best-effort path being expected, further decreases escape process
Uncontrollability；Zero damage of the escape process to survival equipment itself may be implemented, realize the recycling of survival equipment and repeat to make
With reduction use cost.
The survival equipment includes two major parts: escaping rope 10 and rope release device 20.Figure 1A is reality of the invention
The structural representation of second of escaping rope of example is applied, Figure 1B is the partial enlargement for showing escaping rope according to an embodiment of the present invention
Structure diagram.
It is two kinds that escaping rope 10, which is divided to, the first is only simple rope, and no attachment, being suitable for certain tower segments is to wait directly
The tower of diameter cylindrical body is escaped.It is for second the escaping rope 10 of additional rollers, 16 fixed idler whell of knot is used on rope ontology 12
14, it is tapered tower suitable for each section of tower.
Again as shown in FIG. 1A and 1B, which is arranged an idler wheel 14 every such as 500mm in structure, to
Escape personnel (is strapped in fixed bit by the tightening of escaping rope 10 by the frictional force reduced between escaping rope 10 and tower
Set), the rope 16 at 14 both ends of idler wheel limits the idler wheel 14 by modes such as knottings, prevents idler wheel 14 in rolling of falling
Assemble in the process to a certain position.14 quantity of idler wheel is arranged according to the tower section of tower top or the excircle diameter of tower segments
It is configured.Such as one idler wheel 14 is set every 500mm, then it is rounded after the quantity N=π D/500 of idler wheel 14, wherein D is top
Section tower excircle diameter.
Fig. 2 is to show rope release device schematic diagram according to an embodiment of the present invention.As shown in Fig. 2, wherein A is to overlook
Figure, signal escaping rope 10 are connected respectively in rope release device 20 at both ends after tower 30；B is side view, signal
Tower 30, escaping rope 10, escape personnel, escaping rope release device 20 relative positional relationship；The partial enlargement that C is B regards
Figure.
Rope release device 20 is closely connect with escaping rope 10, for receiving the both ends of above-mentioned escaping rope 10
Tightly, the escaping rope 10 is enabled reliably to cover on 30 outer wall of tower, so that when human behavior reaction occurs, escape personnel's energy
In the range of being enough limited in tower wall by the connection with the rope release device 20, reduce escape personnel during escape
Psychological burden or psychological pressure.
10 one end of escaping rope and rope release device 20 are fixed, and the other end passes through the rope withdrawing apparatus of rope release device 20
Escaping rope 10 is controlled by escape personnel after (such as 8 word rings, drop device etc.) and carries out slow release.
It illustrates as one, rope release device can be belt wheel trolley, will not be to tower in dropping process to slide
Abrasion is generated, main structure should be using the high molecular material with some strength, to mitigate its weight as far as possible.Rope release dress
The one end set is securely fixed with escaping rope, and the other end connects the other end of escaping rope 10 by rope withdrawing apparatus (not drawing).
The rope withdrawing apparatus should have the ability that can limit escaping rope loosening and slow release escaping rope.
The working principle of above-mentioned survival equipment are as follows:
It is the tower of cylinder appearance zero draft for tower segments section, cylindrical section tower is adapted to simple rope, which adopts
With with certain antiwear property and with the larger frictional force of lacquer painting, while there is certain high temperature resistance, working condition
It is lower to make its offer that 200 kilogram weights of objects be made to encircle rubbing on tower drum outer wall face enough by limiting rope lengths
Power is wiped, so that escape personnel is strapped within the scope of tower wall.
It is the tower of circular cone appearance for tower segments, circular cone tower is adapted to the escaping rope of additional rollers, work shape
It is long with rope to guarantee that escape personnel can be strapped in circumferential length by survival equipment under state by limiting or adjusting rope lengths
Spend identical tower wall.
Fig. 3 is the illustrative diagram for showing survival equipment and being applied to wind power generating set.This survival equipment can be applied to
The emergency escape of wind power generating set, as shown in figure 3, the survival equipment is formed on the bottom surface for being located at engine room cover 40 at the top of tower 30 in advance
It in space between 42 and yaw system 50, is firmly strapped on tower wall, engine room cover of wind turbine bottom surface 42 surrounds tower
The one prefabricated escape hole 44 of circle of cylinder 30, can not retrieve when safety problem occurs in unit equipment, and scene can not be normal by tower 30 equal
Rule approach can be climbed by the gap of engine room cover 40 and 60 bottom of engineroom flat to the survival equipment when fleeing danger area, by this
Secure latch on survival equipment is fixed on the front hook of PPE (personal safety equipment, such as safety clothes --- with reflecting parts on clothes, climbing ancillary equipment etc.)
On, cabin escape hole is opened, tower wall is slowly pasted and adjusts posture, another hand is slow after adjustment finishes gripping with one hand survival equipment
Escaping rope is discharged, realizes the safety decline stablized at the uniform velocity.
In the prior art, general unit escape hole is to borrow hanging object hole, therefore the position in hole of escaping can generally be passed through
Metal platform and engine room cover bottom case, during escape, during escape personnel is far from cabin, safety rope is easy and gold
Belong to platform and engine room cover bottom case edge scratches, irremediable damage is caused to safety rope.And in an embodiment of the present invention, by
Complete equipment can be protected to greatest extent in the idler wheel on belt wheel trolley and rope, therefore escape process may be implemented, escape is set
For zero damage of itself, the recycling and reuse of survival equipment are realized, reduce use cost.
Traditional safe escape equipment generally once only supports a people or two people's prompt drops, if human behavior reaction occurrence time cabin
Effective escape can not then be realized in the presence of more people by inside having.As optional embodiment, in the other embodiment of the present invention
In, trolley can be evenly distributed in same tethered system inner circle circumferential direction to realize that more people on same system escape, theory is feasible,
As shown in Figure 4.
Fig. 5 is the detailed construction schematic diagram of the rope release device of the embodiment of the present invention.As shown in figure 5, saying as an example
Bright, which may include: rope release device main body 201, multiple 202,8 word rings 203 of wheel, rope closing bag
204, secure latch 205.8 word rings 203 are a kind of drop device or decline protector, also referred to as small slide drop device, as rope closing
One citing of device, it is without being limited thereto, other rope withdrawing apparatus, such as lifter or other prompt drops equipment can also be used.Decline
Protector is to generate frictional force using instrument and rope, allows rope to slow down because of friction so that stopping sliding, to reach deceleration
Decline or the purpose stopped.Escaping rope winding, which passes through or winds, is bound to 8 word rings 203, through escaping rope in 8 word rings 203
The multiple points formed that shuttle rub to increase, and control decrease speed.Above-mentioned 202,8 word ring 203 of multiple wheels, rope closing bag 204,
Secure latch 205 is installed in the rope release device main body 201.The rope release device main body 201 (small vehicle main body) exists
It is the platform of plate in this figure, but can be replaced with other structures to mitigate weight, as long as one is capable of fixing steamboat, 8 words
The carrier of ring and rope closing bag.Escaping rope 10 is fixedly connected by its fixing end 10a with rope release device main body 201,
The other end 10b of escaping rope 10 is release end or crimped end, is intertwined and connected with 8 word rings 203, and escaping rope 10 passes through 8 words
Ring 203 is limited, and controls the rate of release of escaping rope 10.Rope closing bag 204, for being wound through in escaping rope 10
After 8 word rings 203, extra part rope is stored, when discharging escaping rope, 204 the inside of rope closing bag will be incorporated in
The rope of part length release.Optionally, also not settable secure latch 205, but by the small of the 8 word ring 203
Ring is connected as secure latch with the safety buckle on the safety clothes --- with reflecting parts on clothes of escape personnel or lap belt.Optionally, it can also be not provided with
Rope closing bag 204 as storage function.Optionally, in order to realize the self-locking of 8 word rings, it can cooperate and grab knot (from locking catch knot, Auto
Block it) uses, grabbing knot is a kind of protection knot that can carry out raising and lowering, grabs knot and is placed on rope dog point, that is, 8 words
The rope of 203 lower section of ring, grabs the rope for tying locked dog point, has also just locked entire 8 word environmental protection protecting system.Optionally, 8 word ring
203 can be declined protector substitution by ATC class, the advantage is that and are less likely to occur to deform after rope crosses lock, curling is caused to twist strength；
And ATC class decline protector decrease speed is more steady, and stagnant in the air stop can be achieved by handle control.Optionally, 8 word
Ring 203 could alternatively be multifunctional rescue pulley.
The advantages of above-mentioned technical proposal includes:
The survival equipment for wind power generating set of the embodiment of the present invention, structure is simple, at low cost；Also, it is logical
The survival equipment is crossed, best-effort path is fixed, and will not cause secondary injury to escape personnel；Moreover, using the survival equipment, escape
Process psychological pressure caused by escape personnel is smaller；Finally, the survival equipment can realize more people and meanwhile escape or continuous lifesaving.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (11)
1. a kind of survival equipment for wind power generating set characterized by comprising escaping rope (10) and rope release dress
Set (20)；The escaping rope (10) can be sheathed on the outer wall of the tower (30) of wind power generating set, the rope release dress
(20) are set to connect with the escaping rope (10), for the escaping rope (10) to be tightened to the outer wall of the tower (30),
And control the rate of release of the escaping rope (10).
2. survival equipment according to claim 1, which is characterized in that be provided with one or more on the escaping rope (10)
The limiting section of a idler wheel (14) and the idler wheel (14).
3. survival equipment according to claim 2, which is characterized in that the limiting section of the idler wheel (14) includes positioned at described
The knot (16) at idler wheel both ends；The quantity of the idler wheel (14) is according to the excircle of the tower segment of the tower (30) top
Diameter is configured.
4. survival equipment according to claim 1 or 3, which is characterized in that described escaping rope (10) one end and the rope
Rope release device (20) is fixed, and the other end controls institute by escape personnel after the rope withdrawing apparatus of the rope release device (20)
It states escaping rope (10) and carries out slow release.
5. survival equipment according to claim 4, which is characterized in that the rope withdrawing apparatus is decline protector.
6. survival equipment according to claim 1, which is characterized in that the escaping rope (10) uses wear-resistant material system
At outer surface has the lacquer painting for being capable of providing default frictional force.
7. survival equipment according to claim 1, which is characterized in that the escaping rope (10) surrounds tower even circumferential
It is distributed at least two rope release devices (20).
8. according to claim 1,2,3,6,7 described in any item survival equipments, which is characterized in that the rope release device
It (20) include: rope release device main body (201), multiple wheels (202), 8 word rings (203)；The multiple wheel (202) and institute
It states 8 word rings (203) to be installed on the rope release device main body (201), the rope release device main body (201) and institute
The fixing end (10a) for stating escaping rope (10) is fixedly connected, release end or crimped end (10b) winding of the escaping rope (10)
By the 8 word ring (203), the 8 word ring (203) limits the escaping rope (10), and controls the escape
The rate of release of rope (10).
9. a kind of wind power generating set, which is characterized in that it includes of any of claims 1-8 for wind-power electricity generation
The survival equipment of unit, the survival equipment are formed at the top of tower (30) in advance, are strapped on the outer wall of the tower (30), and
In space between engine room cover bottom surface (42) and yaw system (50), the engine room cover bottom surface (42) surrounds the tower
(30) a circle is prefabricated with escape hole (44).
10. wind power generating set according to claim 9, which is characterized in that the survival equipment is in the tower (30)
Outer wall on be provided with it is multiple；The tower includes multiple tower segments, and each tower segments are the cylindrical tower segments of zero draft, or
Person, each tower segments are the tower segments that appearance has certain taper.
11. wind power generating set according to claim 9 or 10, which is characterized in that be additionally provided with peace in the cabin
Quan Sheng is connect with the safety clothes --- with reflecting parts on clothes of escape personnel, and the safety clothes --- with reflecting parts on clothes is mutually fixed with the secure latch (205) on the survival equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811014386.6A CN108969918B (en) | 2018-08-31 | 2018-08-31 | Escape equipment for wind generating set and wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811014386.6A CN108969918B (en) | 2018-08-31 | 2018-08-31 | Escape equipment for wind generating set and wind generating set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108969918A true CN108969918A (en) | 2018-12-11 |
| CN108969918B CN108969918B (en) | 2020-11-13 |
Family
ID=64548587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811014386.6A Active CN108969918B (en) | 2018-08-31 | 2018-08-31 | Escape equipment for wind generating set and wind generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108969918B (en) |
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| EP1624186A2 (en) * | 2004-08-02 | 2006-02-08 | REpower Systems AG | Rescue capsule for wind energy plants |
| CN201486779U (en) * | 2009-08-28 | 2010-05-26 | 广东明阳风电技术有限公司 | Distortion limit switch triggering device |
| CN203064951U (en) * | 2013-01-28 | 2013-07-17 | 华北电力大学（保定） | Friction climbing device for tower type building |
| CN203255831U (en) * | 2013-05-17 | 2013-10-30 | 甘肃建投装备制造有限公司 | Connecting and fastening device of lifting machine for external use of wind-power tower drum |
| CN103547318A (en) * | 2011-05-25 | 2014-01-29 | 乌维·贝格曼 | Rescue method and rescue device |
| CN103961814A (en) * | 2013-02-04 | 2014-08-06 | 徐兴文 | Adjustable downhill device |
| CN107913478A (en) * | 2017-10-18 | 2018-04-17 | 新疆金风科技股份有限公司 | Escape protective device, system, method and wind power generating set |
| CN207575583U (en) * | 2017-11-25 | 2018-07-06 | 无锡锡东电力电气安装工程有限公司 | A kind of pole-climbing fall protection equipment |
| CN108283764A (en) * | 2018-04-02 | 2018-07-17 | 彭方 | Ring building rescue run device |
-
2018
- 2018-08-31 CN CN201811014386.6A patent/CN108969918B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1624186A2 (en) * | 2004-08-02 | 2006-02-08 | REpower Systems AG | Rescue capsule for wind energy plants |
| CN201486779U (en) * | 2009-08-28 | 2010-05-26 | 广东明阳风电技术有限公司 | Distortion limit switch triggering device |
| CN103547318A (en) * | 2011-05-25 | 2014-01-29 | 乌维·贝格曼 | Rescue method and rescue device |
| CN203064951U (en) * | 2013-01-28 | 2013-07-17 | 华北电力大学（保定） | Friction climbing device for tower type building |
| CN103961814A (en) * | 2013-02-04 | 2014-08-06 | 徐兴文 | Adjustable downhill device |
| CN203255831U (en) * | 2013-05-17 | 2013-10-30 | 甘肃建投装备制造有限公司 | Connecting and fastening device of lifting machine for external use of wind-power tower drum |
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| CN108283764A (en) * | 2018-04-02 | 2018-07-17 | 彭方 | Ring building rescue run device |
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| Publication number | Publication date |
|---|---|
| CN108969918B (en) | 2020-11-13 |
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