CN105429046A - Rope ladder head used for equipotential live working and application method therefor - Google Patents
Rope ladder head used for equipotential live working and application method therefor Download PDFInfo
- Publication number
- CN105429046A CN105429046A CN201510947967.5A CN201510947967A CN105429046A CN 105429046 A CN105429046 A CN 105429046A CN 201510947967 A CN201510947967 A CN 201510947967A CN 105429046 A CN105429046 A CN 105429046A
- Authority
- CN
- China
- Prior art keywords
- rope ladder
- ladder head
- live working
- shaped section
- safeties
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
- E06C7/082—Connections between rungs or treads and longitudinal members
- E06C7/083—Bracket type connection
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/12—Lifts or other hoisting devices on ladders
Abstract
The invention discloses a rope ladder head used for equipotential live working and an application method therefor. The rope ladder head comprises a rope ladder head rest, a lifting member, a routing pulley and a safety appliance, wherein the safety appliance comprises a fixed ring, a supporting member, a driving member and a driven member; the fixed ring is fixed on a vertical stand column; the supporting member is fixed outside the fixed ring; the bottom end of the driven member is hinged with the supporting member; the lifting member can be movably connected with the vertical stand column and positioned below the fixed ring; the bottom end of the driving member is hinged with the lifting member, and the top end of the driving member is hinged with the top end of the driven member; the driven member extends into a U-shaped section; and a spring is arranged between the lifting member and the fixed ring. When the rope ladder head is in use, the rope ladder head is hoisted by an insulating lifting rope; the spring is compressed by the pulling force of the insulating lifting rope and the gravity of the rope ladder; a wire clamping opening of the U-shaped section is opened; and after the rope ladder head is suspended on the wire, the insulating lifting rope is loosened, the wire is stressed, the spring rebounds, and the wire clamping opening of the U-shaped section is closed, so that safety appliance is performed automatically, and potential safety hazards are eliminated.
Description
Technical field
The present invention relates to a kind of instrument carrying out live line working, particularly relate to a kind of Equipotential live working rope ladder head and application process thereof.
Background technology
Insulated flexible ladder is a kind of instrument that Equipotential live working is conventional, and it is connected with the rope ladder head of wire by metal material.During use, be connected by insulated flexible ladder with metal rope ladder head lower end, rope ladder head lifts by crane and is suspended on wire by recycling insulation insulated sling, and equipotential personnel climb rope ladder can carry out Equipotential live working.Metal rope ladder head also has the effect of carrying equipotential person weight simultaneously.What the connected mode of metal rope ladder head and wire adopted is pulley hook, and when operation, equipotential personnel can slide onto wire rejected region easily and carry out service work, flexible operation, easy to use.But through using discovery for many years, rope ladder head is connected with wire and there is certain unsafe factor, is mainly reflected in following side:
1, the slip-off preventing of rope ladder head and wire is insured needs equipotential personnel to climb ability manual closing on wire, and when equal potential working personnel climb rope ladder, safeties are in open mode, there is the potential safety hazard of falling from high altitude.
2, safeties closed employing be hung and buckled connected mode, simple being buckled by circular arc safeties carries out closed insurance on stove bolt, when equipotential personnel stand in and rope ladder head work, just may make it to come off due to touching safeties, thus make manned metal rope ladder head be in non-safety position.
3, after equipotential work completes, need equal potential working personnel to open insurance and could extract rope ladder, but often occur in practice that equal potential working personnel carelessness is forgotten insurance is opened, cause rope ladder just cannot remove, operating personnel is needed again to carry out equipotential, could remove rope ladder after insurance being opened, the convenience of use is bad, often increases unnecessary labour intensity and operating risk.
Summary of the invention
The object of the present invention is to provide a kind of Equipotential live working rope ladder head with safeties, safeties can be opened automatically, close.
The invention discloses a kind of Equipotential live working rope ladder head, comprise rope ladder headstock, lifting member, cabling pulley and safeties, rope ladder headstock comprises two longitudinal columns be arranged in parallel and the cross bar be connected between longitudinal column, the top of two longitudinal columns is U-shaped section that Open Side Down, bottom is column type section, the bottom of cabling pulley is higher than the openend of U-shaped section, cabling pulley is installed in U-shaped section, described safeties comprise retainer ring, supporting member, driving member and driven member, retainer ring is fixed on longitudinal column, supporting member is fixed on retainer ring outer wall, bottom and the supporting member of driven member are hinged, lifting member is mobilizable to be connected on longitudinal column, be positioned at the below of retainer ring, the bottom of driving member is articulated with in lifting member, the top of top and driven member is hinged, the top of driven member is stretched in U-shaped section of opening, longitudinal column between lifting member and retainer ring is provided with spring, control driven member is opened, close the opening of U-shaped section.
Preferably, described lifting member comprises the power transmission arm-tie of square type and is installed on the suspension ring at its center, and the two ends of power transmission arm-tie length direction are set with on two described longitudinal columns, and the region outside the corresponding longitudinal column in power transmission arm-tie two ends is provided with hinged seat.
Preferably, described safeties have two covers, be installed on two longitudinal columns respectively, two cover safeties are connected by described lifting member, described supporting member, driving member and driven member are rod member, the bottom of driving member is articulated with on described hinged seat, supporting member and driven member have inside and outside two that are arranged symmetrically with about described retainer ring respectively, driven member and the driving member in outside are hinged, two driven members are connected as a single entity by the arc being arranged at top, and the gap between two driven member tops closed by arc parcel.
Preferably, be S type changeover portion between U-shaped section of described longitudinal column and column type section, the longitudinal center line of column type section vertically divides the longitudinal center line of described cabling pulley equally.
Preferably, the disconnected side end of described U-shaped section of openend is outward-dipping inclined-plane.
Preferably, the bottom of described column type section is the link of mounting insulated flexible ladder.
Preferably, U-shaped section of reversed arrangement on described two longitudinal columns.
Preferably, the maximum elastic force of described spring is 49N.
Preferably, the material of described safeties is aluminium alloy.
The invention also discloses a kind of method of Equipotential live working, the method utilizes above-mentioned rope ladder head to carry out Equipotential live working and comprises the following steps:
(1) coaster of insulated sling hangs on wire by earth potential personnel, and insulated sling is connected with the lifting member of rope ladder head by ground staff, is connected to by rope ladder on the link of rope ladder head bottom simultaneously;
(2) ground staff is by insulated sling by rope ladder and rope ladder head lifting, and spring controls safeties and opens, and rope ladder head rotates after rising and winching to wire place, and wire snaps in safeties and is connected with cabling pulley;
(3) ground staff unclamps insulated sling, recoil of spring, controls insurance automatically closed;
(4) equipotential personnel climbing, operation;
(5) after operation completes, ground staff provides pulling force to insulated sling, and safeties open, and controls rope ladder head and is separated with wire, take off rope ladder head and coaster.
In sum, rope ladder and rope ladder head are lifted by crane by insulated sling by the present invention, under the effect of the pulling force of insulated sling and the deadweight both direction counter force of rope ladder, spring is in state compression, makes driving member drive driven member motion to open the opening of U-shaped section; Rope ladder head hangs over after on wire, unclamps insulated sling, and the load of rope ladder is transferred on wire, recoil of spring, and driving member drives the opening of closed U-shaped section of driven member motion, realizes voluntary insurance, reduces flow chart, increases work efficiency, eliminate safe hidden trouble.
Accompanying drawing explanation
Fig. 1 is the schematic front view of one embodiment of the invention.
Fig. 2 is the schematic side view of embodiment in Fig. 1.
Embodiment
As shown in Figure 1 and Figure 2, the invention discloses a kind of Equipotential live working rope ladder head.This rope ladder head comprises: rope ladder headstock 1, lifting member 2, spring 3, cabling pulley 4 and safeties 5, the mobilizable below being connected to rope ladder headstock 1, being positioned at safeties 5 of lifting member 2, it is spring 3 between lifting member 2 and safeties 5, under spring nature, safeties 5 are closed.
Wherein rope ladder headstock 1 comprises two longitudinal columns be arranged in parallel 11 and two cross bars 12 be arranged between two longitudinal columns 11, longitudinal column 11 is followed successively by U-shaped section 111 from top to bottom, S type changeover portion 112 and column type section 113, the longitudinal center line of column type section 113 vertically divides the longitudinal center line of cabling pulley 4 equally, the bottom of column type section is provided with link 114, and the opening of U-shaped section 111 is that wire snaps in mouth.
Lifting member 2 comprises the power transmission arm-tie 21 of square type and is installed on the suspension ring 22 at its center, and power transmission arm-tie 21 two ends are provided with hinged seat 23, and two longitudinal columns 11 are through power transmission arm-tie 21.
Safeties 5 have two covers be connected on two longitudinal columns 11, often overlap safeties 5 and include retainer ring 51, supporting member 52, driving member 53, driven member 54 and arc 55, supporting member 52 and driven member 53 have inside and outside two that are arranged symmetrically with about retainer ring 51 respectively, two driven members 53 are connected as a single entity by the arc 55 on top, and arc 55 wraps up the top that envelope two closes driven member 53; Retainer ring 51 is fixed on longitudinal column 11, supporting member 52 is fixed on retainer ring 51 outer wall, the bottom of the driven member 54 in outside and supporting member 52 is hinged, the top of top and driving member 53 is hinged, the bottom of driving member 53 is articulated with on the hinged seat 23 of power transmission arm-tie 21.
Meanwhile, in order to ensure result of use, maximum elastic force is selected to be the spring of 49N, the material selection aluminium alloy of safeties.
Snapping in and shifting out for the ease of wire, the end of the U-shaped section of disconnected side of openend is set to outward-dipping inclined-plane.
In order to strengthen the reliability that the present invention and wire mount, U-shaped section of reversed arrangement on two longitudinal columns.
The invention also discloses a kind of method utilizing above-mentioned rope ladder head to carry out Equipotential live working, comprise the following steps:
(1) coaster of insulated sling hangs on wire by earth potential personnel, and insulated sling is connected with the lifting member of rope ladder head by ground staff, is connected to by rope ladder on the link of rope ladder head bottom simultaneously;
(2) ground staff is by insulated sling by rope ladder and rope ladder head lifting, and spring controls safeties and opens, and rope ladder head rotates after rising and winching to wire place, and wire snaps in safeties and is connected with cabling pulley;
(3) ground staff unclamps insulated sling, recoil of spring, controls insurance automatically closed;
(4) equipotential personnel climbing, operation;
(5) after operation completes, ground staff provides pulling force to insulated sling, and safeties open, and controls rope ladder head and is separated with wire, take off rope ladder head and coaster.
So, rope ladder and rope ladder head are lifted by crane by insulated sling by the present invention, in lifting process, spring is by the pulling force of insulated sling and the deadweight of rope ladder, the direction of two active forces is contrary, and spring stress compresses, and driving member drives driven member motion, make the wire of U-shaped section snap in mouth to open, realize automatically opening wire and snap in mouth; Rope ladder head hangs over after on wire, unclamps insulated sling, and the deadweight of rope ladder is transferred on wire, recoil of spring, driving member drives the wire of closed U-shaped section of driven member motion to snap in mouth, realizes voluntary insurance, reduce flow chart, increase work efficiency, eliminate safe hidden trouble.
Claims (10)
1. an Equipotential live working rope ladder head, comprise rope ladder headstock, lifting member, cabling pulley and safeties, rope ladder headstock comprises two longitudinal columns be arranged in parallel and the cross bar be connected between longitudinal column, the top of two longitudinal columns is U-shaped section that Open Side Down, bottom is column type section, the bottom of cabling pulley is higher than the openend of U-shaped section, cabling pulley is installed in U-shaped section, it is characterized in that: described safeties comprise retainer ring, supporting member, driving member and driven member, retainer ring is fixed on longitudinal column, supporting member is fixed on retainer ring outer wall, bottom and the supporting member of driven member are hinged, lifting member is mobilizable to be connected on longitudinal column, be positioned at the below of retainer ring, the bottom of driving member is articulated with in lifting member, the top of top and driven member is hinged, the top of driven member is stretched in U-shaped section of opening, longitudinal column between lifting member and retainer ring is provided with spring, control driven member is opened, close the opening of U-shaped section.
2. Equipotential live working rope ladder head according to claim 1, it is characterized in that: described lifting member comprises the power transmission arm-tie of square type and is installed on the suspension ring at its center, the two ends of power transmission arm-tie length direction are set with on two described longitudinal columns, and the region outside the corresponding longitudinal column in power transmission arm-tie two ends is provided with hinged seat.
3. Equipotential live working rope ladder head according to claim 2, it is characterized in that: described safeties have two covers, be installed on two longitudinal columns respectively, two cover safeties are connected by described lifting member, described supporting member, driving member and driven member are rod member, the bottom of driving member is articulated with on described hinged seat, in supporting member and driven member have respectively and to be arranged symmetrically with about described retainer ring, outer two, driven member and the driving member in outside are hinged, two driven members are connected as a single entity by the arc being arranged at top, the gap between two driven member tops closed by arc parcel.
4. Equipotential live working rope ladder head according to claim 1, is characterized in that: be S type changeover portion between U-shaped section of described longitudinal column and column type section, the longitudinal center line of column type section vertically divides the longitudinal center line of described cabling pulley equally.
5. Equipotential live working rope ladder head according to claim 1, is characterized in that: the disconnected side end of described U-shaped section of openend is outward-dipping inclined-plane.
6. Equipotential live working rope ladder head according to claim 1, is characterized in that: the bottom of described column type section is the link of mounting insulated flexible ladder.
7. Equipotential live working rope ladder head according to claim 1, is characterized in that: U-shaped section of reversed arrangement on described two longitudinal columns.
8. Equipotential live working rope ladder head according to claim 1, is characterized in that: the maximum elastic force of described spring is 49N.
9. Equipotential live working rope ladder head according to claim 1, is characterized in that: the material of described safeties is aluminium alloy.
10. a method for Equipotential live working, is characterized in that: the method utilizes the rope ladder head described in claim 1-9 to carry out Equipotential live working, comprises the following steps:
(1) coaster of insulated sling hangs on wire by earth potential personnel, and insulated sling is connected with the lifting member of rope ladder head by ground staff, is connected to by rope ladder on the link of rope ladder head bottom simultaneously;
(2) ground staff is by insulated sling by rope ladder and rope ladder head lifting, and spring controls safeties and opens, and rope ladder head rotates after rising and winching to wire place, and wire snaps in safeties and is connected with cabling pulley;
(3) ground staff unclamps insulated sling, recoil of spring, controls insurance automatically closed;
(4) equipotential personnel climbing, operation;
(5) after operation completes, ground staff provides pulling force to insulated sling, and safeties open, and controls rope ladder head and is separated with wire, take off rope ladder head and coaster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510947967.5A CN105429046A (en) | 2015-12-17 | 2015-12-17 | Rope ladder head used for equipotential live working and application method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510947967.5A CN105429046A (en) | 2015-12-17 | 2015-12-17 | Rope ladder head used for equipotential live working and application method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105429046A true CN105429046A (en) | 2016-03-23 |
Family
ID=55507064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510947967.5A Pending CN105429046A (en) | 2015-12-17 | 2015-12-17 | Rope ladder head used for equipotential live working and application method therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105429046A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826869A (en) * | 2016-06-13 | 2016-08-03 | 江西电力职业技术学院 | Rope ladder head combined device for repairing overhead transmission line |
| CN106229881A (en) * | 2016-08-05 | 2016-12-14 | 国网湖南省电力公司带电作业中心 | Enter the method for 500/220 kilovolt of multiple-loop line transmission line of electricity electric field and rope ladder head used |
| CN106522824A (en) * | 2016-12-28 | 2017-03-22 | 国网浙江省电力公司湖州供电公司 | Soft ladder locking hook for 110kV electric transmission line |
| CN107143280A (en) * | 2017-07-19 | 2017-09-08 | 国家电网公司 | A kind of rope ladder |
| CN107652678A (en) * | 2017-09-05 | 2018-02-02 | 国网山东省电力公司临沂供电公司 | A kind of insulating ladder available for livewire work |
| CN108923322A (en) * | 2018-07-25 | 2018-11-30 | 吴春诚 | Multidirectional adjustable mounted model electric power overhaul safety device |
| CN109449821A (en) * | 2018-11-21 | 2019-03-08 | 国网福建省电力有限公司 | Insulated flexible ladder coaster installation method based on unmanned air vehicle technique |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007278024A (en) * | 2006-04-11 | 2007-10-25 | Chugoku Electric Power Co Inc:The | Rope ladder for ascending/descending electric pole |
| CN201260051Y (en) * | 2008-08-22 | 2009-06-17 | 华中电网有限公司 | Anti-dropping soft ladder for overhead line operation |
| CN201274388Y (en) * | 2008-09-19 | 2009-07-15 | 衡水供电公司 | Anti-dropping high speed vehicle |
| CN201466571U (en) * | 2009-08-27 | 2010-05-12 | 河南省电力公司平顶山供电公司 | Automatic blocking rope ladder support of line working |
| CN201943566U (en) * | 2010-12-28 | 2011-08-24 | 嘉兴电力局 | Flexible ladder head for equal-potential operation |
| CN202064821U (en) * | 2011-04-14 | 2011-12-07 | 辽宁省电力有限公司盘锦供电公司 | Self-sealing door of insulating flexible ladder |
| CN203491595U (en) * | 2013-09-02 | 2014-03-19 | 国家电网公司 | Self-locking cable slide car device |
| CN203553737U (en) * | 2013-09-02 | 2014-04-16 | 国家电网公司 | Roller skating hook |
| CN104836164A (en) * | 2015-06-03 | 2015-08-12 | 国网冀北电力有限公司唐山供电公司 | Rope ladder climbing combined safety protection tool for preventing high-altitude falling |
| CN205178392U (en) * | 2015-12-17 | 2016-04-20 | 国家电网公司 | Rope ladder head for live working |
-
2015
- 2015-12-17 CN CN201510947967.5A patent/CN105429046A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007278024A (en) * | 2006-04-11 | 2007-10-25 | Chugoku Electric Power Co Inc:The | Rope ladder for ascending/descending electric pole |
| CN201260051Y (en) * | 2008-08-22 | 2009-06-17 | 华中电网有限公司 | Anti-dropping soft ladder for overhead line operation |
| CN201274388Y (en) * | 2008-09-19 | 2009-07-15 | 衡水供电公司 | Anti-dropping high speed vehicle |
| CN201466571U (en) * | 2009-08-27 | 2010-05-12 | 河南省电力公司平顶山供电公司 | Automatic blocking rope ladder support of line working |
| CN201943566U (en) * | 2010-12-28 | 2011-08-24 | 嘉兴电力局 | Flexible ladder head for equal-potential operation |
| CN202064821U (en) * | 2011-04-14 | 2011-12-07 | 辽宁省电力有限公司盘锦供电公司 | Self-sealing door of insulating flexible ladder |
| CN203491595U (en) * | 2013-09-02 | 2014-03-19 | 国家电网公司 | Self-locking cable slide car device |
| CN203553737U (en) * | 2013-09-02 | 2014-04-16 | 国家电网公司 | Roller skating hook |
| CN104836164A (en) * | 2015-06-03 | 2015-08-12 | 国网冀北电力有限公司唐山供电公司 | Rope ladder climbing combined safety protection tool for preventing high-altitude falling |
| CN205178392U (en) * | 2015-12-17 | 2016-04-20 | 国家电网公司 | Rope ladder head for live working |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826869A (en) * | 2016-06-13 | 2016-08-03 | 江西电力职业技术学院 | Rope ladder head combined device for repairing overhead transmission line |
| CN106229881A (en) * | 2016-08-05 | 2016-12-14 | 国网湖南省电力公司带电作业中心 | Enter the method for 500/220 kilovolt of multiple-loop line transmission line of electricity electric field and rope ladder head used |
| CN106229881B (en) * | 2016-08-05 | 2017-11-03 | 国网湖南省电力公司带电作业中心 | Into the method and rope ladder head used of 500/220 kilovolt of multiple-loop line transmission line of electricity electric field |
| CN106522824A (en) * | 2016-12-28 | 2017-03-22 | 国网浙江省电力公司湖州供电公司 | Soft ladder locking hook for 110kV electric transmission line |
| CN107143280A (en) * | 2017-07-19 | 2017-09-08 | 国家电网公司 | A kind of rope ladder |
| CN107652678A (en) * | 2017-09-05 | 2018-02-02 | 国网山东省电力公司临沂供电公司 | A kind of insulating ladder available for livewire work |
| CN108923322A (en) * | 2018-07-25 | 2018-11-30 | 吴春诚 | Multidirectional adjustable mounted model electric power overhaul safety device |
| CN109449821A (en) * | 2018-11-21 | 2019-03-08 | 国网福建省电力有限公司 | Insulated flexible ladder coaster installation method based on unmanned air vehicle technique |
| CN109449821B (en) * | 2018-11-21 | 2024-01-05 | 国网福建省电力有限公司 | Insulation rope ladder pulley installation method based on unmanned aerial vehicle technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105429046A (en) | Rope ladder head used for equipotential live working and application method therefor | |
| CN104538892B (en) | Electrician backpack type self-unlocking lifting tool kit | |
| CN205178392U (en) | Rope ladder head for live working | |
| CN203112346U (en) | Slag-picking grab bucket for aluminum electrolysis hoisting equipment | |
| CN207644663U (en) | A kind of purely mechanic counter weight type lifting ground well | |
| CN103993826A (en) | Safety rope ladder capable of automatically sealing door | |
| CN206873974U (en) | A kind of high-rise working safety belt hangs packaged type anti-fall device | |
| CN208762016U (en) | A kind of Architectural Equipment hanging apparatus | |
| CN204057797U (en) | cable cover hoisting device | |
| CN207035841U (en) | A kind of fire door hoisting device | |
| CN106842468B (en) | A kind of lashed cable device | |
| CN106892348A (en) | Can automatic shutter crane hook | |
| CN209844779U (en) | Motor maintenance wire drawing device | |
| CN103950872A (en) | Upright tube hoisting multifunctional tool of substation altitude plant | |
| CN202657877U (en) | Circuit equipment construction lifting frame | |
| CN208249821U (en) | A kind of self-balancing system of foldable rescue frame | |
| CN209306856U (en) | Small-sized separation type electrical hoisting apparatus | |
| CN203905799U (en) | Automatic door sealing safety type flexible ladder head | |
| CN208659136U (en) | Platform with glass is auxiliary hangs conversion equipment | |
| CN208843629U (en) | A kind of crane upper mechanism is from dismantling device and crane | |
| CN203491595U (en) | Self-locking cable slide car device | |
| CN202558571U (en) | Support type gravity leveling operation platform for crane | |
| CN206615926U (en) | A kind of hook gear for being easy to rapid unhooking | |
| CN206964390U (en) | Current Collector Sleave storage rack | |
| CN217812282U (en) | A safe suspended structure for high altitude construction is built in room |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160323 |
|
| WD01 | Invention patent application deemed withdrawn after publication |