CN108132363B - Insulating ladder clamping device - Google Patents
Insulating ladder clamping device Download PDFInfo
- Publication number
- CN108132363B CN108132363B CN201711419081.9A CN201711419081A CN108132363B CN 108132363 B CN108132363 B CN 108132363B CN 201711419081 A CN201711419081 A CN 201711419081A CN 108132363 B CN108132363 B CN 108132363B
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- Prior art keywords
- spring
- shaft
- insulating ladder
- placing plate
- threaded rod
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Ladders (AREA)
Abstract
The invention discloses an insulation ladder clamping device which comprises a first placing plate, wherein an insulation ladder is arranged on the first placing plate, two ends of the insulation ladder are respectively clamped on the first placing plate, a plurality of fixing devices are arranged on a first threaded rod, each fixing device comprises a clamping body, a first sliding groove is formed in the first placing plate, the first sliding groove is connected with the first threaded rod in a rotating mode, one end of each clamping body is sleeved on the first threaded rod in a threaded mode, a fixing groove is formed in the clamping body, connecting devices are symmetrically arranged on the inner wall of the fixing groove, and one end of the insulation ladder is inserted into the fixing groove. The insulating ladder fixing device is simple in structure and convenient to operate, the insulating ladder can be effectively fixed and clamped through the fixing device, the stability of a test is guaranteed, meanwhile, the safety of workers is guaranteed, and accidents are avoided.
Description
Technical Field
The invention relates to the technical field of voltage withstand test devices, in particular to an insulating ladder clamping device.
Background
Insulating ladder is electric power system's the safe instrument of ascending a height, and mainly used power line's maintenance, maintenance and newly-built prevent and protect staff's personal safety, avoid electrocuteeing danger. DL560-95 electric industry safety work rules stipulate: every 12 months of the insulating hard ladder is subjected to an electrical test, the whole insulating hard ladder is withstand voltage, the top of a tested product is high-voltage, the bottom of the tested product is grounded, the distance between the grounding end and the ground is larger than 1 meter, but the existing internal insulating ladder withstand voltage test device cannot effectively fix an insulator in the test process, so that the insulating ladder is unstable in the test process, accidents easily occur, and the safety of workers is influenced.
Disclosure of Invention
The invention aims to solve the defects in the prior art, such as: at present, the withstand voltage test device of the domestic insulating ladder cannot effectively fix an insulator during testing, so that the insulating ladder is unstable during testing, accidents easily occur, and the safety of workers is influenced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an insulating ladder clamping device, includes first board of placing, first place and be equipped with insulating ladder on the board, insulating ladder's both ends difference joint is first place on the board, be equipped with a plurality of fixing device on the first threaded rod, fixing device is including the card body, first place and be equipped with first spout on the board, first spout internal rotation is connected with first threaded rod, the one end screw thread of the card body cup joints on first threaded rod, the internal fixed slot that is equipped with of card, the symmetry is equipped with connecting device on the inner wall of fixed slot, insulating ladder's one end is inserted and is established in the fixed slot.
Preferably, the connecting device comprises a clamping plate, an L-shaped shaft, a second spring shaft and a first spring shaft, one end of each of the first spring shaft and the second spring shaft is rotatably connected with the clamping plate, one end of the L-shaped shaft is rotatably connected with the first spring shaft, and the other end of the first spring shaft is rotatably connected with the inner wall of the fixing groove.
Preferably, a first spring is connected between the L-shaped shaft and the first spring shaft, a connecting block is arranged at the other end of the second spring shaft, a second spring is connected to one side of the connecting block, and a third spring is connected to the other side of the connecting block.
Preferably, the second spring is connected with one end, far away from the clamping plate, of the first spring shaft, the third spring is connected with the inner wall of the fixing groove, and the clamping plates are arranged on two sides of the insulating ladder.
Preferably, the inner wall of the first sliding groove is rotatably connected with an adjusting gear, the adjusting gear is arranged on a first threaded rod, and the first threaded rod is in threaded connection with the adjusting gear.
According to the invention, two ends of the insulating ladder are respectively inserted into the clamping bodies, so that the supporting legs of the insulating ladder can be stably fixed in the clamping bodies, the two clamping plates are used for clamping the insulating ladder together, and due to the fact that the inclination angles of the supporting legs of the insulating ladder 7 are different, clamping and fixing in a controllable space are realized under the control of the L-shaped shaft and under the combined action of the elastic forces of the second spring, the first spring and the third spring through the change of the included angle between the first spring shaft and the second spring shaft. The device simple structure, convenient operation can carry out effectual fixed and centre gripping to insulating ladder through fixing device, has guaranteed experimental stability, has also guaranteed staff's safety simultaneously, has avoided unexpected emergence.
Drawings
Fig. 1 is a schematic structural diagram of a side surface of an insulation ladder clamping device according to the present invention;
FIG. 2 is a schematic view of the structure at A in FIG. 1;
FIG. 3 is a schematic view of the structure at B in FIG. 1;
FIG. 4 is a schematic side view of an insulation ladder voltage withstand test apparatus according to the present invention;
FIG. 5 is a schematic structural view of a top portion of a portion of an insulation ladder voltage withstand test device according to the present invention;
FIG. 6 is a schematic view of the structure at C in FIG. 4;
FIG. 7 is a schematic view of the structure of FIG. 4 at D;
fig. 8 is a schematic structural diagram at E in fig. 5.
In the figure: 1 a first thread bush, 2 a connecting rod, 3 a rotating piece, 4 a second lifting shaft, 5 a clamping body, 6 a grounding clamp, 7 an insulating ladder, 8 a high-voltage clamp, 9 a first chute, 10 a first placing plate, 11 a first threaded rod, 12 a first lifting shaft, 13 a threaded column, 14 a second chute, 15 a second placing plate, 16 a first transmission rod, 17 a second fixing frame, 18 a second transmission rod, 19 a second threaded rod, 20 a guide rail, 21 a base and 22 a driving box, 23 a second motor, 24 a second driving shaft, 25L-shaped shafts, 26 a first fixed frame, 27 a first driving shaft, 28 a first motor, 29 a second spring shaft, 30 a first spring shaft, 31 a first spring, 32 a second spring, 33 a connecting block, 34 a third spring, 35 a clamping plate, 36 an adjusting gear, 37 a second threaded sleeve, 38 a sliding block, 39 a fixed block, 40 a bolt, 41 a connecting sleeve, 42 a clamping shaft, 43 a first bevel gear and 44 a second bevel gear.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1: referring to fig. 1-3, an insulation ladder clamping device comprises a first placing plate 10, an insulation ladder 7 is arranged on the first placing plate 10, two ends of the insulation ladder 7 are respectively clamped on the first placing plate 10, a first sliding chute 9 is arranged on the first placing plate 10, a first threaded rod 11 is rotatably connected in the first sliding chute 9, a plurality of fixing devices are arranged on the first threaded rod 11, each fixing device comprises a clamp body 5, one end of the clamp body 5 is in threaded sleeve connection with the first threaded rod 11, an adjusting gear 36 is rotatably connected to the inner wall of the first sliding chute 9, the adjusting gear 36 is arranged on the first threaded rod 11, the first threaded rod 11 is in threaded connection with the adjusting gear 36, a user can drive the first threaded rod 11 to rotate by rotating the adjusting gear 36, so that the movement of the clamp body 5 is realized, the organic adjustable effect is achieved, a fixing groove is arranged in the clamp body 5, connecting devices are symmetrically arranged on the inner wall of, one end of the insulating ladder 7 is inserted into the fixing groove, the connecting device comprises a clamping plate 35, an L-shaped shaft 25, a second spring shaft 29 and a first spring shaft 30, one ends of the first spring shaft 30 and the second spring shaft 29 are rotatably connected with the clamping plate 35, one end of the L-shaped shaft 25 is rotatably connected with the first spring shaft 30, the other end of the first spring shaft 30 is rotatably connected with the inner wall of the fixing groove, a first spring 31 is connected between the L-shaped shaft 25 and the first spring shaft 30, the other end of the second spring shaft 29 is provided with a connecting block 33, one side of the connecting block 33 is connected with a second spring 32, the other side of the connecting block 33 is connected with a third spring 34, the second spring 32 is connected with one end of the first spring shaft 30 far away from the clamping plate 35, the third spring 34 is connected with the inner wall of the fixing groove, the clamping plates 35 are arranged at two sides of the insulating ladder 7, in order to ensure that the supporting, the clamping of the insulating ladder 7 is realized through the two clamping plates 35 together, and due to the fact that the supporting legs of the insulating ladder 7 are different in inclination angle, the clamping in the controllable space is realized under the combined action of the elastic forces of the second spring 32, the first spring 31 and the third spring 34 under the control of the L-shaped shaft 25 through the change of the included angle between the first spring shaft 30 and the second spring shaft 29.
Example 2: referring to fig. 2-8, the invention is applied to an insulation ladder voltage withstand test device, which comprises a guide rail 20, a base 21 is arranged at the bottom of the guide rail 20, a second chute 14 is arranged on the guide rail 20, a second threaded rod 19 is rotatably connected to the inner wall of the second chute 14, a second placing plate 15 is arranged on the second threaded rod 19, a sliding device is arranged at the bottom of the second placing plate 15, the second placing plate 15 is slidably connected with the second threaded rod 19 through the sliding device, a first placing plate 10 is arranged on the second placing plate 15, a lifting device is arranged between the first placing plate 10 and the second placing plate 15, a driving device is arranged on the second placing plate 15, the sliding device comprises a pair of sliding blocks 38, the sliding blocks 38 are fixedly connected with the bottom of the second placing plate 15, the second threaded rod 19 passes through the sliding blocks 38, a groove is arranged in each sliding block 38, a second threaded sleeve 37 is arranged in each groove, the second threaded sleeve 37 is in each second, the two ends of the second threaded rod 19 are respectively sleeved with a fixed block 39, the sliding block 38 is fixedly connected with the second threaded sleeve 37 through the fixed block 39, when the second threaded rod 19 rotates, the second threaded sleeve 37 is in threaded sleeve connection with the second threaded rod 19, the second threaded rod 19 is fixedly connected with the sliding block 38 through the fixed block 39, and the sliding block 38 cannot rotate, so that the second threaded sleeve 37 drives the sliding block 38 to slide in the second sliding chute 14, the driving device is connected with the lifting device, the first placing plate 10 is provided with the insulating ladder 7, the two ends of the insulating ladder 7 are respectively clamped on the first placing plate 10, the lifting device comprises a plurality of first lifting shafts 12 and second lifting shafts 4, the middle points of the first lifting shafts 12 and the second lifting shafts 4 are rotatably connected through the rotating part 3, one end of the second lifting shaft 4 of the first lifting shaft 12 is rotatably connected with the bottom of the first placing plate 10, the other ends of the first lifting shaft 12 and the second lifting shaft 4 are rotatably connected with the upper side of the second placing plate 15, and the first lifting shaft 12 and the second lifting shaft 4 are rotatably connected in a crossed manner, so that when the included angle between one of the first lifting shaft 12 and the second lifting shaft 4 is changed, the whole lifting device can be driven to move up and down, and the whole lifting device can be controlled within a small range, the driving device comprises a group of second transmission rods 18, connecting rods 2 and first transmission rods 16, threaded columns 13 are symmetrically arranged on one side of the lifting device, first threaded sleeves 1 are sleeved on the threaded columns 13 in a threaded manner, the connecting rods 2 are fixedly connected between the two first threaded sleeves 1, the middle points of the connecting rods 2 are rotatably connected with one of the connecting rods 2, the second transmission rods 18 are arranged on one sides of the two threaded columns 13, and the second transmission rods 18 are in threaded connection with the threaded columns 13, the two second transmission rods 18 are fixedly connected with the second placing plate 15 through the second fixing frame 17, two ends of the first transmission rod 16 are respectively in threaded connection with the second transmission rods 18, the first transmission rod 16 is connected with the second placing plate 15 through the first fixing frame 26, the second placing plate 15 is provided with a first motor 28, the driving end of the first motor 28 is rotatably connected with a first driving shaft 27, the first driving shaft 27 is fixedly sleeved with a first bevel gear 43, the first transmission rod 16 is sleeved with a second bevel gear 44, the second bevel gear 44 is in meshed connection with the first bevel gear 43, the driving end of the first motor 28 drives the first driving shaft 27 to rotate, because the second bevel gear 44 is in meshed connection with the first bevel gear 43, the first driving shaft 27 drives the first transmission rod 16 to rotate, the first transmission rod 16 is in threaded connection with the second transmission rod 18, and the second transmission rod 18 is in threaded connection with the threaded column 13, the first thread bush 1 is in thread sleeve connection with the thread column 13, so that the first thread bush 1 slides up and down on the thread column 13, the movement of the first thread bush 1 drives the movement of the connecting rod 2, the connecting rod 2 realizes the operation of the lifting device through the rotating part 3, the insulating ladder 7 is provided with the high-voltage clamp 8 and the grounding clamp 6, the high-voltage clamp 8 is arranged above the grounding clamp 6, the first thread rod 11 is provided with a plurality of fixing devices, each fixing device comprises a clamp body 5, the first placing plate 10 is provided with a first chute 9, the first chute 9 is rotationally connected with the first thread rod 11, one end thread of the clamp body 5 is in sleeve connection with the first thread rod 11, the inner wall of the first chute 9 is rotationally connected with an adjusting gear 36, the adjusting gear 36 is arranged on the first thread rod 11, the first thread rod 11 is in thread connection with the adjusting gear 36, and a user can drive the first thread rod 11 to rotate by rotating, thereby realizing the movement of the clamp body 5 and achieving organic adjustable effect, a fixed groove is arranged in the clamp body 5, connecting devices are symmetrically arranged on the inner wall of the fixed groove, one end of the insulating ladder 7 is inserted in the fixed groove, each connecting device comprises a clamping plate 35, an L-shaped shaft 25, a second spring shaft 29 and a first spring shaft 30, one ends of the first spring shaft 30 and the second spring shaft 29 are rotatably connected with the clamping plate 35, one end of the L-shaped shaft 25 is rotatably connected with the first spring shaft 30, the other end of the first spring shaft 30 is rotatably connected with the inner wall of the fixed groove, the other end of the L-shaped shaft 25 is rotatably connected with the first threaded sleeve 1, a first spring 31 is connected between the L-shaped shaft 25 and the first spring shaft 30, the other end of the second spring shaft 29 is provided with a connecting block 33, one side of the connecting block 33 is connected with a second spring 32, the other side of the connecting block 33 is connected with a third spring 34, the second spring 32 is connected, the third spring 34 is connected with the inner wall of the fixed groove, the clamping plates 35 are arranged at two sides of the insulating ladder 7, in order to stably fix the supporting leg of the insulating ladder 7 in the clamping body 5, the insulating ladder 7 is clamped by the two clamping plates 35 together, because the inclination angles of the supporting leg of the insulating ladder 7 are different, the clamping and fixing in the controllable space are realized by the change of the included angle between the first spring shaft 30 and the second spring shaft 29 under the control of the L-shaped shaft 25 and under the combined action of the elasticity of the second spring 32, the first spring 31 and the third spring 34, the high-voltage clamp 8 and the grounding clamp 6 both comprise a pair of clamping plates, the two clamping plates are hinged, one end of each clamping plate is made of metal, the other end of each clamping plate is sleeved with insulating rubber, one end of the metal material of each clamping plate is clamped with the insulating ladder 7, the high-voltage clamp 8 is electrically connected with a voltage box, the grounding clamp 6 is connected with, the high voltage is connected through one end, the other end is grounded, metal is conductive, insulating rubber prevents workers from contacting and being injured when the workers do not completely discharge, a driving box 22 is arranged on one side of a guide rail 20, the driving box 22 is connected with the guide rail 20 in a clamping mode through a bolt 40, warning lines are arranged on the periphery of the guide rail 20, a voltage box is arranged on the outer side of the warning lines, an adjusting knob is arranged on the voltage box, the workers need to be arranged outside the warning lines, the insulating ladder 7 is subjected to a pressurization test through the voltage box, a second motor 23 is arranged on the driving box 22, a second driving shaft 24 is rotatably connected to the driving end of the second motor 23, a connecting sleeve 41 is arranged at one end, close to the driving box 22, of a second threaded rod 19, a plurality of clamping shafts 42 are arranged in the connecting sleeve 41, a cross groove is formed in one.
In the invention, when a user uses the device, two ends of the insulating ladder 7 are respectively inserted into the clamping body 5, in order to ensure that the supporting legs of the insulating ladder 7 can be stably fixed in the clamping body 5, the two clamping plates 35 are used for clamping the insulating ladder 7 together, and because the inclined angles of the supporting legs of the insulating ladder 7 are different, the clamping and fixing in a controllable space are realized under the combined action of the elastic forces of the second spring 32, the first spring 31 and the third spring 34 under the control of the L-shaped shaft 25 through the change of the included angle between the first spring shaft 30 and the second spring shaft 29.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (1)
1. The insulating ladder clamping device comprises a first placing plate (10) and is characterized in that an insulating ladder (7) is arranged on the first placing plate (10), two ends of the insulating ladder (7) are respectively clamped on the first placing plate (10), a plurality of fixing devices are arranged on a first threaded rod (11), each fixing device comprises a clamp body (5), a first sliding groove (9) is formed in the first placing plate (10), the first threaded rod (11) is rotatably connected in the first sliding groove (9), one end of each clamp body (5) is sleeved on the first threaded rod (11) in a threaded manner, fixing grooves are formed in the clamp bodies (5), connecting devices are symmetrically arranged on the inner walls of the fixing grooves, and one end of the insulating ladder (7) is inserted into the fixing grooves;
the connecting device comprises a clamping plate (35), an L-shaped shaft (25), a second spring shaft (29) and a first spring shaft (30), one ends of the first spring shaft (30) and the second spring shaft (29) are rotatably connected with the clamping plate (35), one end of the L-shaped shaft (25) is rotatably connected with the first spring shaft (30), and the other end of the first spring shaft (30) is rotatably connected with the inner wall of the fixing groove;
a first spring (31) is connected between the L-shaped shaft (25) and the first spring shaft (30), a connecting block (33) is arranged at the other end of the second spring shaft (29), a second spring (32) is connected to one side of the connecting block (33), and a third spring (34) is connected to the other side of the connecting block (33);
the second spring (32) is connected with one end, far away from the clamping plate (35), of the first spring shaft (30), the third spring (34) is connected with the inner wall of the fixing groove, and the clamping plate (35) is arranged on two sides of the insulating ladder (7);
the inner wall of the first sliding groove (9) is rotatably connected with an adjusting gear (36), the adjusting gear (36) is arranged on a first threaded rod (11), and the first threaded rod (11) is in threaded connection with the adjusting gear (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711419081.9A CN108132363B (en) | 2017-12-25 | 2017-12-25 | Insulating ladder clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711419081.9A CN108132363B (en) | 2017-12-25 | 2017-12-25 | Insulating ladder clamping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108132363A CN108132363A (en) | 2018-06-08 |
| CN108132363B true CN108132363B (en) | 2020-04-10 |
Family
ID=62392823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711419081.9A Active CN108132363B (en) | 2017-12-25 | 2017-12-25 | Insulating ladder clamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108132363B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2343478A (en) * | 1998-11-09 | 2000-05-10 | Edmond Joseph Mcgrath | Adjustable leg for ladder |
| AU2003100707A4 (en) * | 2003-10-23 | 2004-05-13 | Stephen Harry Smith | Stabilizer arm for a ladder |
| CN201612790U (en) * | 2010-02-01 | 2010-10-27 | 吕春蕾 | Multipurpose leg support |
| CN201874444U (en) * | 2010-11-29 | 2011-06-22 | 天津市电力公司 | Multipurpose safety-belt fixed ladder-stool frame |
| CN202417295U (en) * | 2011-12-14 | 2012-09-05 | 河南省电力公司郑州供电公司 | Insulating single-leg ladder leg stabilizer |
| AU2011253570A1 (en) * | 2011-11-21 | 2013-06-06 | Gandini, Frank Mr | Ladder stabilising assembly |
| CN107035314A (en) * | 2017-06-15 | 2017-08-11 | 兴化市永盛电力器材有限公司 | A kind of damp proof insulation boxlike lift |
| CN206581875U (en) * | 2016-12-27 | 2017-10-24 | 大连船舶重工集团有限公司 | A kind of chemical tanker portable aluminium ladder |
| CN206607000U (en) * | 2017-04-13 | 2017-11-03 | 全南县彩美达科技发展有限公司 | A kind of liftable ladder in building site |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130199873A1 (en) * | 2012-02-07 | 2013-08-08 | Shawn Prentice | Ladder Rail Gutter Clamp Device |
-
2017
- 2017-12-25 CN CN201711419081.9A patent/CN108132363B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2343478A (en) * | 1998-11-09 | 2000-05-10 | Edmond Joseph Mcgrath | Adjustable leg for ladder |
| AU2003100707A4 (en) * | 2003-10-23 | 2004-05-13 | Stephen Harry Smith | Stabilizer arm for a ladder |
| CN201612790U (en) * | 2010-02-01 | 2010-10-27 | 吕春蕾 | Multipurpose leg support |
| CN201874444U (en) * | 2010-11-29 | 2011-06-22 | 天津市电力公司 | Multipurpose safety-belt fixed ladder-stool frame |
| AU2011253570A1 (en) * | 2011-11-21 | 2013-06-06 | Gandini, Frank Mr | Ladder stabilising assembly |
| CN202417295U (en) * | 2011-12-14 | 2012-09-05 | 河南省电力公司郑州供电公司 | Insulating single-leg ladder leg stabilizer |
| CN206581875U (en) * | 2016-12-27 | 2017-10-24 | 大连船舶重工集团有限公司 | A kind of chemical tanker portable aluminium ladder |
| CN206607000U (en) * | 2017-04-13 | 2017-11-03 | 全南县彩美达科技发展有限公司 | A kind of liftable ladder in building site |
| CN107035314A (en) * | 2017-06-15 | 2017-08-11 | 兴化市永盛电力器材有限公司 | A kind of damp proof insulation boxlike lift |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108132363A (en) | 2018-06-08 |
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