CN106315450A - Integral automatic synchronous pre-tightening device for steel strand group anchor inhaul cables - Google Patents
Integral automatic synchronous pre-tightening device for steel strand group anchor inhaul cables Download PDFInfo
- Publication number
- CN106315450A CN106315450A CN201610904799.6A CN201610904799A CN106315450A CN 106315450 A CN106315450 A CN 106315450A CN 201610904799 A CN201610904799 A CN 201610904799A CN 106315450 A CN106315450 A CN 106315450A
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- Prior art keywords
- oil
- piston
- cylinder
- hole
- steel strand
- 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
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 44
- 239000010959 steel Substances 0.000 title claims abstract description 44
- 230000001360 synchronised effect Effects 0.000 title abstract 3
- 239000003921 oil Substances 0.000 claims description 40
- 239000010720 hydraulic oil Substances 0.000 claims description 14
- 238000004080 punching Methods 0.000 claims description 13
- 239000002828 fuel tank Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/30—Constructional features with positive brakes or locks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F13/00—Common constructional features or accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/26—Adaptations or arrangements of pistons
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an integral automatic synchronous pre-tightening device for steel strand group anchor inhaul cables. An integral multi-cylinder single pre-tightening jack is fixed to the left end of a top plate and comprises an oil cylinder and pistons. Multiple piston holes are formed in the oil cylinder. The pistons are arranged in the piston holes to form an integral multi-piston structure. The pistons are provided with through holes, hollow wraps are connected into the through holes of the pistons in a sleeved manner, and the hollow wraps are fixed to the oil cylinder to form a structure that the pistons move relative to the oil cylinder and the hollow wraps. The left end of the integral multi-cylinder single pre-tightening jack is connected with a single-hole tool anchor plate, the left end of a tensioning pedestal is connected with an anchor gear, the anchor gear is provided with holes allowing steel strands to pass, and it is guaranteed that the steel strands pass the holes. The integral automatic synchronous pre-tightening device has the beneficial effects that the one-oil-cylinder multi-piston structure is adopted for the pre-tightening jack, the integration degree is high, and the function that the multiple steel strands are simultaneously and automatically pre-tightened can be achieved; the working space is small, automatic reverse tensioning of the jack can be achieved for ultra-long steel strands, and continuous pre-tightening is achieved; and the speed is high, and the labor cost is low.
Description
Technical field
The present invention relates to a kind of civil engineering construction machinery and the pre-tightening apparatus of construction, particularly to a kind of steel strand wires group
Anchor rope monoblock type automatic synchronization pre-tightening apparatus.
Background technology
In the engineerings such as steel strand group anchor inhaul cable stretch-draw, post-tensioned prestressing stretch-draw, the lifting of large-scale component, traction, it is both needed to
First presstressed reinforcing steel or load muscle are carried out pretension so that every presstressed reinforcing steel or load muscle stress are basically identical, the most just can enter
Row integral tension and lifting, traction.Currently used pretightening jack is front clip type jack, and it has following defects that
(1) use before clip type jack pretension, can only a pretension, due between steel strand wires produce phase mutual friction, can lead
Cause each steel strand wires discontinuity.And owing to jack stroke is short, and steel strand wires and longer, need jack the most artificial
Falling to open a tune rope, efficiency is low, and hand labor intensity is big, work high above the ground, increases security risk；
(2) providing external force, manual operation oil pump with common oil pump to jack, ordinary jack does not possess displacement and leads simultaneously
The data acquisitions such as gravitation, entirely with artificial reading, Artificial Control, error is big, and risk is big.
Summary of the invention
It is an object of the invention to provide and a kind of can be used on steel strand group anchor inhaul cable, post-tensioned prestressing muscle, large-scale component
The engineering track cable pre-tightening apparatus such as lifting, traction, can realize many steel strand wires pretension the most automatically, can to overlength steel strand wires
Realizing jack automatically to fall, the function such as continuous pretension, easy construction, efficiency is high, and pretightning force controls uniform steel strand wires group's anchor
Drag-line monoblock type automatic synchronization pre-tightening apparatus.
The solution of the present invention is such that
A kind of steel strand group anchor inhaul cable monoblock type automatic synchronization pre-tightening apparatus, including top board, stretching bed seat and spike, described top board
Left end is fixed with the single pretightening jack of monoblock type multi-cylinder, and the described single pretightening jack of monoblock type multi-cylinder includes oil cylinder and work
Plug, described oil cylinder has multiple piston hole, and each piston apparatus constitutes the structure of overall multiple piston in piston hole；Described work
Plug is the piston of band through hole, is socketed with punching set in its through hole, and described punching set is fixed on oil cylinder, forms piston relative to oil cylinder
With the structure of punching set movement, cylinder wall has the oil-feed cylinder hydraulic oil path connecting each piston and connects each piston
Oil return cylinder hydraulic oil path, constitute the structure that each piston stretches out simultaneously or bounces back, oil-feed cylinder hydraulic oil path and oil return
Cylinder hydraulic oil communication hydraulic power unit；The left end of the described single pretightening jack of monoblock type multi-cylinder connects single hole moveable anchor
Plate, described single hole instrument anchor slab has the hole that single steel strand passes through, it is ensured that steel strand wires pass punching set, single hole instrument anchor slab；
Each single hole left end of described single hole instrument anchor slab is the hole coordinated with work clip sheet；Described stretching bed seat left end connects anchor
Tool, described anchorage has the hole that single steel strand passes through, it is ensured that steel strand wires pass, and each single hole at anchorage left end is lower work
The hole that intermediate plate coordinates.
More specifically technical scheme also includes: the left end of described single hole instrument anchor slab connects movable panel, described activity
Top board is socketed on the guide post being fixed on single hole instrument anchor slab, is provided with elastic force apparatus between guide post and movable panel,
Described elastic force apparatus elastic force to the right promotes movable panel to withstand on the left side of work clip sheet.
Further: the left end of described anchorage is provided with intermediate plate anticreep plate, make the work clip sheet being installed on anchorage be in
Between anchorage and intermediate plate anticreep plate.
Further: described hydraulic power unit includes fuel tank, electronic box, control valve group, pressure transducer, described control valve group bag
Including valve body, solenoid directional control valve, automatically controlled overflow valve, described control valve group is provided with oil-in, oil return opening, each oil-in, oil return
Mouth is respectively provided with a solenoid directional control valve；Described pressure transducer and described automatically controlled overflow valve are arranged on oil-feed oil circuit.
The invention have the advantage that
1, pretightening jack uses a multiple piston structure of oil cylinder, and integration degree is high, can realize many steel strand wires the most certainly
Dynamic pretension function, and work space is little；
2, overlength steel strand wires can realize jack automatically fall to open, continuous pretension, speed is fast, and cost of labor is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of oil cylinder 8.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is hydraulic power unit panel parts scheme of installation of the present invention.
Fig. 5 is the structural representation of control valve group.
In figure, reference is: 1, steel strand wires, 2, back-moving spring, 3, single hole instrument anchor slab, 4, guide post, 5, movable top
Plate, 6, tool clamping piece, 7, oil return opening, 8, oil cylinder, 9, piston, 10, oil-in, 11, location-plate, 12, top board, 13, spike, 14,
Anchorage, 15, intermediate plate anticreep plate, 16, stretching bed seat, 17, preload unit installing space, 18, electronic box, 19, frequency conversion motor, 20, electricity
Magnetic reversal valve, 21, valve body, 22, pressure transducer, 23, oil-in, 24, oil return opening, 25, pressure gauge connection, 26, automatically controlled overflow
Valve, 27, oil filler 28, electromagnetic valve main valve 29, punching set 30, work clip sheet 31, oil-feed cylinder hydraulic oil path 32, oil return
Cylinder hydraulic oil path.
Detailed description of the invention
The present invention is provided with multi-piston type pretightening jack, automated tool anchor, hydraulic power unit, overall control center, intermediate plate anticreep plate,
Sending instruction by overall control center, hydraulic power unit drives pretightening jack to realize pretension work.
As it is shown in figure 1, top board 12, stretching bed seat 16 and spike 13 are interconnected to form support frame structure, described top board
12 left ends are fixed with the single pretightening jack of monoblock type multi-cylinder, and the described single pretightening jack of monoblock type multi-cylinder includes oil cylinder 8
With piston 9, as shown in Figure 2,3, described oil cylinder 8 has 7 piston holes, and each piston 9 constitutes overall 7 in being installed on piston hole
The structure of individual piston；Described piston 9 is the piston of band through hole, is socketed with punching set in its through hole, and described punching set is fixed on oil
Cylinder 8, forms piston 9 and overlaps the structure of movement relative to oil cylinder 8 and punching, and the assembly in each piston hole is combined into a pretension list
Unit.Time oil cylinder hydraulic having the oil-feed cylinder hydraulic oil path 31 connecting each piston on oil cylinder 8 wall and connect each piston
Oil path 32, constitutes the structure that each piston stretches out simultaneously or bounces back, oil-feed cylinder hydraulic oil path oil-in 10 and oil return cylinder
Hydraulic oil path oil-in 7 connects hydraulic power unit；The left end of the described single pretightening jack of monoblock type multi-cylinder connects single hole work
Tool anchor slab 3, described single hole instrument anchor slab 3 has the hole that single steel strand passes through, it is ensured that steel strand wires are through punching set 29, single hole work
Tool anchor slab 3；Each single hole left end of described single hole instrument anchor slab 3 is the hole coordinated with tool clamping piece；Described stretching bed seat 16 is left
End connection has anchorage 14, described anchorage 14 to have the hole that single steel strand passes through, it is ensured that steel strand wires pass, at anchorage 14 left end
Each single hole is the hole that lower work clip sheet coordinates.
The left end of described single hole instrument anchor slab 3 connects has movable panel 5, described movable panel 5 to be socketed on and be fixed on single hole
Guide post 4 on instrument anchor slab 3, is provided with elastic force apparatus between the limited block and movable panel 5 of guide post 4 termination, described
Elastic force apparatus elastic force to the right promotes movable panel 5 to withstand on the left side of work clip sheet, and the elastic force apparatus of the present embodiment is at list
Hole instrument anchor slab 3 left end is fixed with the guide post 4 stretched out to left end, and guide post 4 is socketed with back-moving spring 2, the work of back-moving spring 2
The movable panel 5 being socketed on guide post 4 is withstood in moved end, and the elastic force to the right of back-moving spring 2 promotes movable panel 5 to withstand on filing appliance
The left side of sheet.
The left end of described anchorage 14 is provided with intermediate plate anticreep plate 15, and intermediate plate anticreep plate 15 is consolidated with anchorage 14 by screw rod,
It has through hole and passes through for steel strand wires 1.Work clip sheet 30 is arranged on the through hole left end of anchorage 14, is in anchorage 14 and intermediate plate anticreep
Between plate 15.The use of described intermediate plate anticreep plate 15 is to prevent the intermediate plate being arranged on anchorage from getting loose when pretension stretch-draw.
The most described hydraulic power unit includes fuel tank, electronic box 18, control valve group, pressure transducer 22, described control
Valve group includes that valve body 21, solenoid directional control valve 20, automatically controlled overflow valve 26, described control valve group are provided with oil-in 21, oil return opening 24,
Each oil-in 21, oil return opening 24 are respectively provided with a solenoid directional control valve；Described pressure transducer 22 and described automatically controlled overflow valve
26 are arranged on oil-feed oil circuit.
The present embodiment is when pretension is constructed, and control method is as follows:
1, after installation equipment, by starting device after the touch screen input pretightning force setting value of overall control center, equipment is pressed the most automatically
Following steps work:
2, pretension: overall control center sends instruction, solenoid directional control valve 20 action, and to pretightening jack fuel feeding, hydraulic oil is from pretension thousand
Jin jacking hydraulic fluid port 10 sequentially enters each pretension working cell stretch-draw oil cylinder, and each pretension working cell piston 9 extends, single hole moveable anchor
Plate 3 is with the tool clamping piece 6 of clamping steel strand wires 1 together to reach, and by lax steel strand wires tension, pressure transducer 22 is real simultaneously
Time measured pressure value and by pressure data transmit to overall control center.When piston 9 stretches cylinder one stroke of arrival, as pressure is also less than
Reaching pretightning force setting value, then solenoid directional control valve 20 action, piston 9 automated backhaul carries out the pretension of next stroke, drives at piston 9
During single hole instrument anchor slab 3 backhaul, the tool clamping piece 6 of single hole automated tool anchor resets under the effect of back-moving spring 2, for next line
Journey pretension prepares.When piston 9 stretches cylinder, the intermediate plate anticreep plate 15 being arranged on anchorage 14 front end can prevent intermediate plate from getting loose；At piston
During backhaul, work clip sheet 30 self-locking under the effect of steel strand wires 1 gravity of anchorage 14, prevent steel strand wires 1 from bouncing back.So circulation
Back and forth, until pretightning force reaches setting value.When a certain steel strand wires pretightning force reaches pretightning force setting value, pressure transducer will
Pressure information is transferred to control centre, and control centre sends instruction, and automatically controlled overflow valve 26 starts, and this pretension working cell cannot be again
Supercharging, the piston 9 of this unit quits work, and remaining does not reaches pretension and sets the pretension working cell corresponding to steel strand wires of power and continue
Work, so all reaches pretightning force setting value until all steel strand wires, and overall control center sends instruction, solenoid directional control valve 20 action,
Stop pretightening jack fuel feeding.
Claims (4)
1. a steel strand group anchor inhaul cable monoblock type automatic synchronization pre-tightening apparatus, including top board (12), stretching bed seat (16) and support
Foot (13), it is characterised in that: described top board (12) left end is fixed with the single pretightening jack of monoblock type multi-cylinder, described monoblock type
The single pretightening jack of multi-cylinder includes oil cylinder (8) and piston (9), and described oil cylinder (8) has multiple piston hole, each piston (9)
The structure of overall multiple pistons is constituted in being installed on piston hole；Described piston (9) is the piston of band through hole, is socketed with in its through hole
Punching set (), described punching set () is fixed on oil cylinder (8), is formed piston (9) relative to oil cylinder (8) and the knot of punching set () movement
Structure, has oil-feed cylinder hydraulic oil path (10) connecting each piston and the oil return cylinder connecting each piston on oil cylinder (8) wall
Hydraulic oil path (7), constitutes the structure that each piston stretches out simultaneously or bounces back, oil-feed cylinder hydraulic oil path (10) and oil return cylinder
Hydraulic oil path (7) connection hydraulic power unit；The left end of the described single pretightening jack of monoblock type multi-cylinder connects single hole moveable anchor
Plate (3), described single hole instrument anchor slab (3) has the hole that single steel strand passes through, it is ensured that steel strand wires pass punching set, single hole instrument
Anchor slab (3)；Each single hole left end of described single hole instrument anchor slab (3) is the hole coordinated with work clip sheet；Described stretching bed seat
(16) left end connects has anchorage (14), described anchorage (14) to have the hole that single steel strand passes through, it is ensured that steel strand wires pass, at anchor
Each single hole of tool (14) left end is the hole that lower work clip sheet coordinates.
Steel strand group anchor inhaul cable monoblock type automatic synchronization pre-tightening apparatus the most according to claim 1, it is characterised in that: described
The left end of single hole instrument anchor slab (3) connects has movable panel (5), described movable panel (5) to be socketed on and be fixed on single hole moveable anchor
Guide post (4) on plate (3), is provided with elastic force apparatus between guide post (4) and movable panel (5), described elastic force apparatus to
Right elastic force promotes movable panel (5) to withstand on the left side of work clip sheet.
Steel strand group anchor inhaul cable monoblock type automatic synchronization pre-tightening apparatus the most according to claim 1, it is characterised in that: described
The left end of anchorage (14) is provided with intermediate plate anticreep plate (15), makes the work clip sheet (30) being installed on anchorage (14) be in anchorage
(14) and between intermediate plate anticreep plate (15).
Steel strand group anchor inhaul cable monoblock type automatic synchronization pre-tightening apparatus the most according to claim 1, it is characterised in that: described
Hydraulic power unit includes fuel tank, electronic box (18), control valve group, pressure transducer (22), and described control valve group includes valve body (21), electricity
Magnetic reversal valve (20), automatically controlled overflow valve (26), described control valve group is provided with oil-in (21), oil return opening (24), each oil-feed
Mouth (21), oil return opening (24) are respectively provided with a solenoid directional control valve；Described pressure transducer (22) and described automatically controlled overflow valve
(26) it is arranged on oil-feed oil circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610904799.6A CN106315450A (en) | 2016-10-18 | 2016-10-18 | Integral automatic synchronous pre-tightening device for steel strand group anchor inhaul cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610904799.6A CN106315450A (en) | 2016-10-18 | 2016-10-18 | Integral automatic synchronous pre-tightening device for steel strand group anchor inhaul cables |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106315450A true CN106315450A (en) | 2017-01-11 |
Family
ID=57817647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610904799.6A Pending CN106315450A (en) | 2016-10-18 | 2016-10-18 | Integral automatic synchronous pre-tightening device for steel strand group anchor inhaul cables |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106315450A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018072589A1 (en) * | 2016-10-18 | 2018-04-26 | 柳州黔桥工程材料有限公司 | Automated and synchronized control system for bundled steel strand anchoring |
| CN109775628A (en) * | 2019-01-29 | 2019-05-21 | 北京城建集团有限责任公司 | A kind of double rope lifting devices and its construction method |
| CN110091433A (en) * | 2019-05-23 | 2019-08-06 | 上海市政工程设计研究总院（集团）有限公司 | A kind of more piston punching hydraulic modules |
| CN110374148A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of anti-floating engineering pile vertical load experiment detection method and device |
| CN110374149A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of anti-floating pile vertical load detection method and disk knot detection device |
| CN110374151A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of full-automatic vertical load detection method and device of anti-floating pile |
| CN110374150A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of anti-floating pile vertical load experiment detection method and device equipped with pre-tightening apparatus |
| CN110424478A (en) * | 2019-08-26 | 2019-11-08 | 关喜才 | A kind of anti-floating pile variable diameters vertical load detection method and device |
| CN112962977A (en) * | 2021-03-17 | 2021-06-15 | 安徽工业大学 | Intelligent adjusting device and method for tension consistency of steel wire rope |
| CN113512950A (en) * | 2021-05-13 | 2021-10-19 | 开封强力集团锚固技术股份有限公司 | Hydraulic clamping device for adjusting tension degree of steel strand and using method thereof |
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| EP0544573A1 (en) * | 1991-11-26 | 1993-06-02 | FREYSSINET INTERNATIONAL et COMPAGNIE | Device for preventing slack in prestressing strands |
| CN2172761Y (en) * | 1993-07-23 | 1994-07-27 | 郝晋升 | Asynchronous traction device |
| CN2224194Y (en) * | 1995-06-27 | 1996-04-10 | 郝晋昇 | Group stretch-draw jack |
| KR20040097857A (en) * | 2003-05-13 | 2004-11-18 | 이영환 | Simultaneous Multi-strand Jacking Machine Producing Uniform Prestressing Forces for all Simultaneously Jacked Tendons |
| CN103526948A (en) * | 2013-10-24 | 2014-01-22 | 柳州黔桥工程材料有限公司 | Control method of intelligent tension system and intelligent tension system |
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- 2016-10-18 CN CN201610904799.6A patent/CN106315450A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0544573A1 (en) * | 1991-11-26 | 1993-06-02 | FREYSSINET INTERNATIONAL et COMPAGNIE | Device for preventing slack in prestressing strands |
| CN2172761Y (en) * | 1993-07-23 | 1994-07-27 | 郝晋升 | Asynchronous traction device |
| CN2224194Y (en) * | 1995-06-27 | 1996-04-10 | 郝晋昇 | Group stretch-draw jack |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018072589A1 (en) * | 2016-10-18 | 2018-04-26 | 柳州黔桥工程材料有限公司 | Automated and synchronized control system for bundled steel strand anchoring |
| CN109775628A (en) * | 2019-01-29 | 2019-05-21 | 北京城建集团有限责任公司 | A kind of double rope lifting devices and its construction method |
| CN109775628B (en) * | 2019-01-29 | 2024-04-30 | 北京城建集团有限责任公司 | Double-rope lifting device and construction method thereof |
| CN110091433A (en) * | 2019-05-23 | 2019-08-06 | 上海市政工程设计研究总院（集团）有限公司 | A kind of more piston punching hydraulic modules |
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| CN110374148A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of anti-floating engineering pile vertical load experiment detection method and device |
| CN110374149A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of anti-floating pile vertical load detection method and disk knot detection device |
| CN110374151A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of full-automatic vertical load detection method and device of anti-floating pile |
| CN110374150A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of anti-floating pile vertical load experiment detection method and device equipped with pre-tightening apparatus |
| CN110424478A (en) * | 2019-08-26 | 2019-11-08 | 关喜才 | A kind of anti-floating pile variable diameters vertical load detection method and device |
| CN112962977A (en) * | 2021-03-17 | 2021-06-15 | 安徽工业大学 | Intelligent adjusting device and method for tension consistency of steel wire rope |
| CN113512950A (en) * | 2021-05-13 | 2021-10-19 | 开封强力集团锚固技术股份有限公司 | Hydraulic clamping device for adjusting tension degree of steel strand and using method thereof |
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Application publication date: 20170111 |
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