CN107795271A - Climbing ladder apparatus and the method for lower well thereon for artificial digging pile - Google Patents
Climbing ladder apparatus and the method for lower well thereon for artificial digging pile Download PDFInfo
- Publication number
- CN107795271A CN107795271A CN201711014629.1A CN201711014629A CN107795271A CN 107795271 A CN107795271 A CN 107795271A CN 201711014629 A CN201711014629 A CN 201711014629A CN 107795271 A CN107795271 A CN 107795271A
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- Prior art keywords
- cat ladder
- support
- stake holes
- ladder
- soft
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- 230000002493 climbing Effects 0.000 title claims abstract description 40
- 241000282326 Felis catus Species 0.000 claims abstract description 127
- 238000006722 reduction reaction Methods 0.000 claims description 19
- 230000000875 corresponding Effects 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 210000002356 Skeleton Anatomy 0.000 description 13
- 239000002965 rope Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 230000003014 reinforcing Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001603 reducing Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001429 stepping Effects 0.000 description 2
- 210000000481 Breast Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 230000000717 retained Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
- E06C9/06—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted
- E06C9/14—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted with non-rigid longitudinal members, e.g. rope or chain ladders, ladders of the lazy-tongs type
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
Abstract
A kind of method of lower well the invention discloses climbing ladder apparatus for artificial digging pile and thereon, belongs to capital construction auxiliary equipment design and manufacturing technology field.There is provided that a kind of safe to use, working space is big, can recycle and cost is cheap for artificial digging pile climbing ladder apparatus and the method for lower well thereon.Described climbing ladder apparatus includes soft cat ladder, limited support system and cat ladder support, the soft cat ladder being removably suspended on by described cat ladder support in stake holes, and the position in the stake holes radially is limited by described limited support system.The method of the upper lower well is based on climbing ladder apparatus, first soft cat ladder is put into stake holes and supported, the servant into stake holes again, soft cat ladder and limited support system vacating space is received after complete under staff, soft cat ladder and limited support system is put down when needing upper people.Both the problem of soft cat ladder easily steps on sky had been overcome, has overcome the problem of rigid cat ladder space-consuming influences to be unearthed again.
Description
Technical field
The present invention relates to a kind of climbing ladder apparatus, more particularly, to a kind of climbing ladder apparatus for artificial digging pile, belongs to base
Build construction auxiliary equipment design and manufacturing technology field.The invention further relates to a kind of side using lower well on the climbing ladder apparatus
Method.
Background technology
In engineering construction, when especially being built in suburb or mountain area place, some backfills, miscellaneous are frequently encountered
Banket or foundation condition that surface dust is deeper, but institute's construction of structures requires that basic above load is larger, and by large scale computer
The limitation of tool equipment construction, now just need to use hand-dug pile foundation.
According to《Technical code for building pile foundation》(JGJ94-2008) required with artificial digging pile safety regulation for operations, excavated by manual work
Hole stake is in digging process, and construction worker can only be led to ground by cat ladder or be entered in wellhole, then the stability of cat ladder
It is extremely important with security.
Being presently used for the cat ladder of servant on artificial digging pile has two kinds：One kind is the i.e. soft cat ladder of flexible cat ladder, using rope
Formed with waddy colligation；Another kind is the i.e. hard cat ladder of rigid cat ladder, is formed using reinforcement welding.It is soft to climb for service condition
Ladder is typically directly put it into hole, stretches into bottom hole along retaining wall or between two parties, does not have so that cat ladder is marked time between retaining wall
There are space or cat ladder suspention oscillating air；Hard cat ladder is welded using reinforcing bar, is pushed up from hole until bottom hole, it is understood that there may be is influenceed
Unearthed working space or not prison welding is consolidated.《A kind of steel climbing ladder apparatus for people on artificial digging pile》(the patent No.：
ZL201520371240.2 leg) is mounted with stepping on to help, it is ensured that is marked time and is retained certain hole between retaining wall, avoids " stepping on sky "
Phenomenon, it will mark time and be processed into a shape, it is ensured that the firm welding marked time between ladder side, be suitable for by some section steel cat ladder connections
Servant on the artificial digging pile of different depth.
In summary, flexible cat ladder is although economical but dangerous, easily occurs making a misstep phenomenon；Rigid cat ladder although firm jail
Lean on but influence the operating space in hole and be unearthed, and be inconvenient to recycle.
The content of the invention
The technical problems to be solved by the invention are：There is provided it is a kind of it is safe to use, working space is big, can recycle and into
This cheap climbing ladder apparatus for artificial digging pile.The present invention also provides a kind of side using lower well on the climbing ladder apparatus
Method.
Technical scheme is used by solve above-mentioned technical problem：A kind of climbing ladder apparatus for artificial digging pile, bag
Soft cat ladder is included, described climbing ladder apparatus also includes limited support system and cat ladder support, dismountable by described cat ladder support
The soft cat ladder being suspended in stake holes, the position in the stake holes radially are limited by described limited support system.
It is further that described limited support system includes at least two groups of locating supports, is vertically distributed on described soft
The locating support described in each group on cat ladder is adapted in the size of radial direction and the internal diameter of stake holes of corresponding position.
Such scheme it is preferable that, described locating support be cylindrical structure sub-truss, described
The radial direction middle part of sub-truss is provided with fixation kit, and described soft cat ladder is limited to the branch by described fixation kit
Support the radial direction middle part of truss；The soft cat ladder being removably suspended in the stake holes, in the stake holes radially
Position is limited by the distance of the soft cat ladder to sub-truss edge.
It is further that described sub-truss includes restocking, undercarriage, connecting rod and support bar, described restocking and institute
The undercarriage stated is connected as an entirety by described support bar, and described fixation kit is arranged in institute by described connecting rod
State the radial direction middle part of sub-truss.
Such scheme it is preferable that, the restocking and the undercarriage diametrically equal sized, the restocking with
Distance between the undercarriage vertically is not less than 20cm, and the diametrically equal sized restocking 7 compares phase with the undercarriage 8
Answer the small 5-10cm of internal diameter of the stake holes of opening position.
It is further that described fixation kit is claim-reduction.
A kind of method using lower well on the climbing ladder apparatus, cat ladder support is determined according to stake holes port size first
Morpheme size, determines the length of soft cat ladder and the group number of locating support that needs are arranged according to stake holes depth, and determines every
The radial dimension of locating support described in one group；Then described cat ladder support and locating support are made respectively；Then will limit
Position support frame is fixed to the corresponding position of soft cat ladder by claim-reduction, and is fixed to described cat ladder branch by one end of soft cat ladder
On frame, cat ladder support is finally installed to the top of the stake holes, and the sub-assembly of soft cat ladder and locating support is put into stake
In hole can into stake holes outside lower work personnel,
When not needing lower work personnel, the sub-assembly of soft cat ladder and locating support is withdrawn upwards.
The beneficial effects of the invention are as follows：The application is a set of including soft cat ladder, limited support system and cat ladder branch by setting
The climbing ladder apparatus of frame, and the soft cat ladder is removably suspended in stake holes by described cat ladder support, then make described
Position of the soft cat ladder in the stake holes radially is limited by described limited support system.So, needed in operating personnel
It during upper lower well, and can be operated by following steps, i.e., be determined to make above-mentioned cat ladder according to stake holes port size first
The morpheme size of support, the group for the locating support arranged according to the length of the soft cat ladder of stake holes depth determination needs and needs
Number, and determine the radial dimension of locating support described in each group；Then described cat ladder support and limited support are made respectively
Frame；Locating support is then fixed to the corresponding position of soft cat ladder by claim-reduction, and is fixed to by one end of soft cat ladder
On described cat ladder support, cat ladder support is finally installed to the top of the stake holes, and soft cat ladder and locating support
Sub-assembly, which is put into stake holes, when not needing lower work personnel, to be withdrawn upwards soft into stake holes outside lower work personnel
The sub-assembly of cat ladder and locating support.The climbing ladder apparatus that the application provides combines existing soft cat ladder and rigid cat ladder
Advantage, and the shortcomings that overcome existing soft cat ladder by limited support system, then it is installed to as needed by cat ladder support again
The top of stake holes, climbing ladder apparatus safe to use, and packing up after upper and lower complete staff the application is not only ensure that, also
It is big that larger working space can be provided.Furthermore the limited support system and cat ladder support due to the application are detachable knot
Structure, especially soft cat ladder can also be recycled so as to greatly reducing the construction costs.
Brief description of the drawings
Fig. 1 is that the use process for the climbing ladder apparatus that the present invention is used for artificial digging pile arranges schematic diagram；
Fig. 2 be the present invention relates to limited support system structural representation.
In figure mark for：Soft cat ladder 1, limited support system 2, cat ladder support 3, stake holes 4, locating support 5, fixation kit 6,
Restocking 7, undercarriage 8, connecting rod 9, support bar 10.
Embodiment
It is that one kind provided by the invention is safe to use, working space is big, can recycle and cost is low as shown in Figure 1 and Figure 2
The honest and clean climbing ladder apparatus for artificial digging pile, also provide a kind of method using lower well on the climbing ladder apparatus.Described
Climbing ladder apparatus includes soft cat ladder 1, and described climbing ladder apparatus also includes limited support system 2 and cat ladder support 3, passes through described cat ladder
Support 3 is removably suspended on the soft cat ladder 1 in stake holes 4, and the position in the stake holes 4 radially passes through described
The restriction of limited support system 2；Cat ladder branch is determined according to the port size of stake holes 4 using the method for lower well on the climbing ladder apparatus first
The morpheme size of frame 3, determines the length of soft cat ladder 1 and the group number of locating support 5 that needs are arranged according to the depth of stake holes 4,
And determine the radial dimension of locating support 5 described in each group；Then described cat ladder support 3 and locating support are made respectively
5；Locating support 5 is then fixed to the corresponding position of soft cat ladder 1 by claim-reduction, and fixed by one end of soft cat ladder 1
Onto described cat ladder support 3, cat ladder support 3 is finally installed to the top of the stake holes 4, and soft cat ladder 1 and spacing branch
The sub-assembly of support 5 be put into stake holes 4 can into stake holes 4 outside lower work personnel, when do not need lower work personnel when, to
The upper sub-assembly for withdrawing soft cat ladder 1 and locating support 5.The application is a set of including soft cat ladder 1, limited support by setting
It is the climbing ladder apparatus of 2 and cat ladder support 3, and the soft cat ladder 1 is removably suspended on stake by described cat ladder support 3
In hole 4, position of the soft cat ladder 1 in the stake holes 4 radially is then set to pass through the described restriction of limited support system 2.
So, in lower well on operating personnel need, and can be operated by following steps, i.e., first according to the aperture of stake holes 4
Size determines to make the morpheme size of above-mentioned cat ladder support 3, the length for the soft cat ladder 1 for determining to need according to the depth of stake holes 4 and
The group number of locating support 5 arranged is needed, and determines the radial dimension of locating support 5 described in each group；Then make respectively
Make described cat ladder support 3 and locating support 5；Locating support 5 is then fixed to the corresponding positions of soft cat ladder 1 by claim-reduction
Place is put, and is fixed to by one end of soft cat ladder 1 on described cat ladder support 3, cat ladder support 3 is finally installed to the stake holes
4 top, and the sub-assembly of soft cat ladder 1 and locating support 5 be put into stake holes 4 can into stake holes 4 lower work personnel
Outside, when not needing lower work personnel, the sub-assembly of soft cat ladder 1 and locating support 5 is withdrawn upwards.The application provides
Climbing ladder apparatus the advantages of combining existing soft cat ladder and rigid cat ladder, and existing soft cat ladder 1 is overcome by limited support system 2
The shortcomings that, be then installed into the top of stake holes 4 as needed by cat ladder support 3 again, not only ensure that it is safe to use, and
The climbing ladder apparatus of the application is packed up after upper and lower complete staff, it is big that larger working space can also be provided.Furthermore due to this
The limited support system of application and cat ladder support are demountable structure, and especially soft cat ladder can also be recycled so as to big
Big reducings the construction costs.
, can according to the method by servant's wellhole on described climbing ladder apparatus that the application provides in above-mentioned embodiment
Know, reuse for convenience, simplify the knot of the limited support system 2 and the locating support 5 for forming the limited support system 2
Structure, meanwhile, and can plays a part of limiting position of the soft cat ladder 1 in stake holes 4, described limited support system 2 well
Including at least two groups of locating supports 5, the locating support 5 described in each group on the soft cat ladder 1 is vertically distributed in footpath
To size and the internal diameter of stake holes 4 of corresponding position be adapted.Now, described locating support 5 be preferably shaped to be in
The sub-truss of cylinder type, and fixation kit 6 is provided with the radial direction middle part of the sub-truss, it is described soft to climb
Ladder 1 is limited to the radial direction middle part of the sub-truss by described fixation kit 6；Removably it is suspended on the stake holes 4
In the soft cat ladder 1, position in the stake holes 4 radially by the soft cat ladder 1 to sub-truss edge away from
From restriction.Further, described sub-truss preferably comprises the structure of restocking 7, undercarriage 8, connecting rod 9 and support bar 10,
Described restocking 7 and described undercarriage 8 are connected as an entirety by described support bar 10, and described fixation kit 6 passes through
Described connecting rod 9 is arranged in the radial direction middle part of the sub-truss.Meanwhile edge between the restocking 7 and the undercarriage 8
The distance of axial direction is not less than 20cm, the restocking 7 and the undercarriage 8 diametrically equal sized, and than corresponding position
The small 5-10cm of internal diameter of stake holes 4.Described fixation kit 6 is claim-reduction.
In summary, the technical scheme that the application provides compared with prior art, has the advantages that：
1st, holder device of the present invention not only stable for soft cat ladder by the way that soft cat ladder to be limited in the centre of support
Swing, and ensure that the space that operating personnel rides, prevent make a misstep phenomenon well；
2nd, holder device of the present invention sets the diameter of its supporting structure according to hole depth, ensure that appearance is unexpected
It is stuck in during landing, when support drops downwards on the retaining wall of next stage step, second protection effect is played to the safety of operating personnel；
3rd, holder device of the present invention, it is used in combination with soft cat ladder, it is recoverable soft to climb to after bottom hole under operating personnel
Ladder and holder device so that working space and unaffected, raising efficiency of construction of being unearthed in hole；
4th, holder device of the present invention, reusable edible, and by way of colligation, simple, convenient reality
It is easy with, storage, save construction costs.
Embodiment one
As shown in Figure 1 and Figure 2 the application provide the climbing ladder apparatus for artificial digging pile structure, it be by upper skeleton,
Lower skeleton, support bar and claim-reduction composition, described upper skeleton are welded by Φ 14 HRB400 bar connecting bars, and in centre
Position is welded with two claim-reductions, and skeleton diameter determines according to the hole interior diameter of artificial digging pile different depth position, every grade
The diameter of holder device position aperture than where is small 5-10cm；Described lower skeleton is identical with upper skeleton structure and material；It is described
Support bar using Φ 14 HRB400 reinforcement weldings on upper and lower skeleton, the length of support bar is 20cm；Described claim-reduction is adopted
Formed with Φ 10 HRB400 semi arch reinforcement weldings, tied rope by claim-reduction by soft cat ladder colligation on holder device.
It is as follows during specific use：
1st, it is cat ladder support 3 to install well head bearing：When being dug in hole as deep as to 2m, well head is installed in the upper end of artificial digging pile
Bearing；
2nd, split-mounting type climbing ladder apparatus：The locating support made is used into rope colligation in soft cat ladder by claim-reduction
On, and it is fixed；
3rd, fixed Combination formula climbing ladder apparatus：It is the combination of soft cat ladder and locating support by the Combined type ladder stand that assembly is completed
The upper end of part is fixed on well head bearing；
4th, Combined type ladder stand device is transferred：After the Combined type ladder stand fixed, it is slowly put into hole, until soft cat ladder
Reach bottom hole；
5th, servant：After the completion of formula cat ladder arrangement to be combined, operating personnel can lower opening operation；
6th, Combined type ladder stand device is withdrawn：After operating personnel reaches bottom hole safely, slowly Combined type ladder stand is received
Return, in order to avoid influence operation of being unearthed；
7th, upper people：Repeat step 4 and step 6；
8th, well head is the top protection of stake holes：, be in time to hole when operating personnel completes the operation of artificial digging pile
Covered, and rigid protective frame is set around.
Further illustrate, described connecting rod and support bar use Φ using Φ 14 HRB400 reinforcing bars, claim-reduction
10 HRB400 semi arch reinforcing bars.If scene do not have HRB400 reinforcing bar, also can using other ranks reinforcing bar instead of using, but
Its bar diameter size is constant.
Further illustrating, described locating support is connected support bar and restocking, undercarriage by welding, and
The height of support bar is 20cm.
For step 1, further explanation, described well head bearing is to be used for fixed Combination formula climbing ladder apparatus and be unearthed
Equipment；
For step 2, further explanation, described holder device be the skeleton of locating support be welding and
Into, and two claim-reductions are welded with centre position；
For step 2, further explanation, holder device enters hole depth one of supporting structure of every 4 meters of settings along cat ladder
Device, every grade of holder device skeleton diameter determines according to the hole interior diameter of different depth position, if excess room D=holder devices
The aperture of residing plane-skeleton diameter, D values scope are 5-10cm；
For step 2, further explanation, described colligation is to tie up marking time for soft cat ladder in upper skeleton by claim-reduction
On, the big rope of the stress of soft cat ladder is tied up on lower skeleton respectively；
For step 2, further illustrate, soft cat ladder and holder device are carried out colligation by rope by claim-reduction, and are marked time
Tie up in the claim-reduction of upper skeleton, the big rope of the main force is tied up in the claim-reduction of lower skeleton respectively.
Claims (7)
1. a kind of climbing ladder apparatus for artificial digging pile, including soft cat ladder (1), it is characterised in that：Described climbing ladder apparatus is also
Including limited support system (2) and cat ladder support (3), removably it is suspended in stake holes (4) by described cat ladder support (3)
Soft cat ladder (1), the position in the stake holes (4) radially are limited by described limited support system (2).
2. the climbing ladder apparatus according to claim 1 for artificial digging pile, it is characterised in that：Described limited support system
(2) include at least two groups of locating supports (5), be vertically distributed on the limited support described in each group on the soft cat ladder (1)
Frame (5) is adapted in the size of radial direction and the internal diameter of stake holes (4) of corresponding position.
3. the climbing ladder apparatus according to claim 2 for artificial digging pile, it is characterised in that：Described locating support
(5) it is the sub-truss of cylindrical structure, the radial direction middle part of the sub-truss is provided with fixation kit (6), institute
The soft cat ladder (1) stated is limited to the radial direction middle part of the sub-truss by described fixation kit (6)；Dismountable suspension
Soft cat ladder (1) in the stake holes (4), the position in the stake holes (4) radially pass through the soft cat ladder (1) to institute
The distance for stating sub-truss edge limits.
4. the climbing ladder apparatus according to claim 3 for artificial digging pile, it is characterised in that：Described sub-truss bag
Restocking (7), undercarriage (8), connecting rod (9) and support bar (10) are included, described restocking (7) and described undercarriage (8) are by described
Support bar (10) be connected as an entirety, described fixation kit (6) is arranged in the support by described connecting rod (9)
The radial direction middle part of truss.
5. the climbing ladder apparatus according to claim 4 for artificial digging pile, it is characterised in that：The restocking (7) and institute
Undercarriage (8) diametrically equal sized is stated, the distance between the restocking (7) and the undercarriage (8) vertically is not less than
20cm, diametrically the equal sized restocking (7) and the undercarriage (8) are smaller than the internal diameter of the stake holes (4) of corresponding position
5-10cm。
6. the climbing ladder apparatus for artificial digging pile according to claim 4 or 5, it is characterised in that：Described fixation group
Part (6) is claim-reduction.
7. it is a kind of using described in claim 6 on climbing ladder apparatus lower well method, it is characterised in that：First according to stake holes (4)
Port size determines the morpheme size of cat ladder support (3), and the length and needs of soft cat ladder (1) are determined according to stake holes (4) depth
The group number of the locating support (5) of arrangement, and determine the radial dimension of locating support (5) described in each group；Then make respectively
Make described cat ladder support (3) and locating support (5)；Then locating support (5) is fixed to soft cat ladder (1) by claim-reduction
Corresponding position, and be fixed to by one end of soft cat ladder (1) on described cat ladder support (3), finally by cat ladder support (3)
The top of the stake holes (4) is installed to, and the sub-assembly of soft cat ladder (1) and locating support (5) is put into stake holes (4)
To outside the interior lower work personnel of stake holes (4),
When not needing lower work personnel, the sub-assembly of soft cat ladder (1) and locating support (5) is withdrawn upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711014629.1A CN107795271B (en) | 2017-10-26 | 2017-10-26 | Climbing ladder apparatus and the method for lower well thereon for artificial digging pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711014629.1A CN107795271B (en) | 2017-10-26 | 2017-10-26 | Climbing ladder apparatus and the method for lower well thereon for artificial digging pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107795271A true CN107795271A (en) | 2018-03-13 |
| CN107795271B CN107795271B (en) | 2019-08-06 |
Family
ID=61547631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711014629.1A Active CN107795271B (en) | 2017-10-26 | 2017-10-26 | Climbing ladder apparatus and the method for lower well thereon for artificial digging pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107795271B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611019A (en) * | 2019-01-15 | 2019-04-12 | 五冶集团上海有限公司 | A kind of artificial digging pile ladder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4164991A (en) * | 1978-04-03 | 1979-08-21 | Aldo Marra | Fire escape device |
| CN2635887Y (en) * | 2003-08-08 | 2004-08-25 | 周泽鹏 | Soft ladder with metal support piece |
| CN203783449U (en) * | 2014-04-23 | 2014-08-20 | 中国长江电力股份有限公司 | Safe cave crawling ladder |
| CN204252812U (en) * | 2014-11-14 | 2015-04-08 | 重庆中重石油机械有限公司 | Portable deep-well rescue ladder |
| CN106522822A (en) * | 2016-11-06 | 2017-03-22 | 合肥星服信息科技有限责任公司 | Computer-technology-based downhole survey auxiliary tool |
-
2017
- 2017-10-26 CN CN201711014629.1A patent/CN107795271B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4164991A (en) * | 1978-04-03 | 1979-08-21 | Aldo Marra | Fire escape device |
| CN2635887Y (en) * | 2003-08-08 | 2004-08-25 | 周泽鹏 | Soft ladder with metal support piece |
| CN203783449U (en) * | 2014-04-23 | 2014-08-20 | 中国长江电力股份有限公司 | Safe cave crawling ladder |
| CN204252812U (en) * | 2014-11-14 | 2015-04-08 | 重庆中重石油机械有限公司 | Portable deep-well rescue ladder |
| CN106522822A (en) * | 2016-11-06 | 2017-03-22 | 合肥星服信息科技有限责任公司 | Computer-technology-based downhole survey auxiliary tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611019A (en) * | 2019-01-15 | 2019-04-12 | 五冶集团上海有限公司 | A kind of artificial digging pile ladder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107795271B (en) | 2019-08-06 |
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