CN107916946B - Segment lifting structure - Google Patents
Segment lifting structure Download PDFInfo
- Publication number
- CN107916946B CN107916946B CN201711367517.4A CN201711367517A CN107916946B CN 107916946 B CN107916946 B CN 107916946B CN 201711367517 A CN201711367517 A CN 201711367517A CN 107916946 B CN107916946 B CN 107916946B
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- pulley
- steel wire
- trolley
- oil cylinder
- hoisting
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 82
- 239000010959 steel Substances 0.000 claims abstract description 82
- 230000007246 mechanism Effects 0.000 claims description 46
- 230000002265 prevention Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention provides a pipe piece hoisting structure, which comprises a pulley box, a skeleton beam, a hoisting oil cylinder, a pipe piece picking device and double steel wire ropes, wherein the pulley box is arranged on the skeleton beam; the hoisting oil cylinder is arranged on a framework beam, a first trolley pulley, a second trolley pulley and a pipe piece picking device are arranged on the framework beam, the pipe piece picking device is arranged between the first trolley pulley and the second trolley pulley, the hoisting oil cylinder is arranged on the left side of the pipe piece grabbing device, an oil cylinder pulley is arranged on the hoisting oil cylinder, a steel wire front hinge end is arranged on the framework beam on the left side of the hoisting oil cylinder, and a steel wire rear hinge end is arranged on the right side of the pipe piece picking device. The pipe piece hoisting structure provided by the invention has the advantages that the layout and the space utilization of structural members on the crane are more reasonable, the structure is compact, meanwhile, the hydraulic device is used as driving power, the faults caused by using electric parts are avoided, and the service life is longer.
Description
Technical Field
The invention belongs to the field of duct piece assembly, and particularly relates to a duct piece hoisting structure.
Background
In the existing pipe piece lifting system of the tunnel tunneling shield machine, the pipe piece is lifted from the position of a pipe piece transport vehicle in the tunnel to a pipe piece picking-up area of a pipe piece assembling machine. One of important systems in the shield equipment of the segment lifting system is mainly used for transporting and lifting segments. The existing duct piece single-beam hoisting structure has the following defects: 1. the occupied space is large, and the installation space of other shield components is compressed; 2. most of hoisting drives are electric hoists, the failure rate of the hoisting drives is high, and the braking is unreliable; 3. the cable needs to be additionally installed and arranged, which is troublesome.
Disclosure of Invention
In view of the above, the invention aims to provide a pipe piece hoisting structure, which uses structural members on a crane to realize more reasonable layout and space utilization and compact structure, and uses a hydraulic device as driving power, thereby avoiding faults caused by using electric parts, being safer and having longer service life.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
a pipe piece hoisting structure comprises a pulley box, a frame beam, a hoisting oil cylinder, a pipe piece picking device and double steel wire ropes;
the hoisting oil cylinder is arranged on the frame beam, a first trolley pulley, a second trolley pulley and the pipe piece picking device are arranged on the frame beam, the pipe piece picking device is arranged between the first trolley pulley and the second trolley pulley, the hoisting oil cylinder is arranged on the left side of the pipe piece grabbing device, an oil cylinder pulley is arranged on the hoisting oil cylinder, a steel wire front hinge end is arranged on the frame beam on the left side of the hoisting oil cylinder, and a steel wire rear hinge end is arranged on the right side of the pipe piece picking device;
the pulley box is arranged on the right side of the framework beam and comprises a pulley box body, a detachable rope skipping prevention baffle, a fixed pin shaft, a first steering pulley and a second steering pulley, the detachable rope skipping prevention baffle is arranged at the upper end and the lower end of the pulley box body, the first steering pulley and the second steering pulley are connected with the pulley box body through the fixed pin shaft, the axial centers of the first steering pulley and the second steering pulley are the same in height, and the radiuses of the first steering pulley and the second steering pulley are different;
the double steel wire ropes comprise a first steel wire rope and a second steel wire rope;
the first steel wire rope is sequentially connected with the rear steel wire hinge end, the oil cylinder pulley, the first steering pulley, the first trolley pulley, the duct piece picking mechanism, the second trolley pulley and the front steel wire hinge end;
the second steel wire rope is sequentially connected with the rear steel wire hinge end, the oil cylinder pulley, the second steering pulley, the first trolley pulley, the duct piece picking mechanism, the second trolley pulley and the front steel wire hinge end
The first trolley pulley, the second trolley pulley and the duct piece pickup device are arranged between the front hinged end of the steel wire and the pulley box.
Further, the duct piece pickup device comprises a trolley frame body, a trolley traction mechanism, a grabbing mechanism and grabbing mechanism pulleys, wherein the grabbing mechanism pulleys are arranged above the trolley frame body, the trolley traction mechanism is arranged in front of the trolley frame body, and the grabbing mechanism is arranged below the trolley frame body.
Further, the first steel wire rope and the second steel wire rope are connected with the pipe piece pickup device through the grabbing mechanism pulleys.
Further, a wire rope supporting wheel is arranged between the first steering pulley and the first trolley pulley, and the first wire rope and the second wire rope are connected with the grabbing mechanism pulley through the wire rope supporting wheel.
Furthermore, the trolley traction mechanism is provided with a hinge structure at the left side and the right side.
Further, the trolley traction mechanism is of a parallel hinged structure.
Further, the double steel wire ropes are fixedly connected with the rear hinged ends of the steel wires and the front hinged ends of the steel wires.
Further, the first diverting pulley and the second diverting pulley spacing are equal to a radius difference.
Compared with the prior art, the pipe piece hoisting structure has the following advantages:
according to the pipe piece hoisting structure, the two pulleys are fixed on the pulley box through the pin shafts, are arranged side by side along the skeleton beam and form 90 degrees with the pulley of the oil cylinder, have the same arrangement height but different sizes, and have the pulley radius difference equal to the distance between the two grooves of the pulley of the hoisting oil cylinder, so that the trend dimension change of the steel wire rope is realized, the rope skipping is not easy, and the structure is compact; when the lifting oil cylinder returns to the original position, the pulley of the oil cylinder is backwards pulled, the steel wire rope is pulled, the grabbing mechanism ascends, meanwhile, the structure can walk at the same time in lifting, after the trolley is subjected to traction force, the trolley moves along the walking track of the skeleton beam, and the pulley of the trolley and the pulley of the grabbing mechanism roll on the steel wire rope to advance, so that the grabbing mechanism walks more stably under the condition of carrying. The trolley traction connection part is of a balanced hinge structure, so that the stress on two sides can be balanced, and the problem of asynchronism under the condition of double traction is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic diagram illustrating operation of an oil cylinder in a pipe piece hoisting structure according to an embodiment of the present invention;
fig. 2 is a schematic operation diagram of a segment pick-up device in a segment lifting structure according to an embodiment of the present invention;
fig. 3 is a partial view of a segment lifting structure according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a segment picking device with a segment lifting structure according to an embodiment of the present invention;
fig. 5 is a side view of a segment picking device with a segment lifting structure according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a pulley box of a segment lifting structure according to an embodiment of the invention.
Reference numerals illustrate:
1-a front hinge end of the steel wire; 2-double wire rope; 3-skeleton beams; 4-lifting the oil cylinder; 5-an oil cylinder pulley; 6-a second trolley pulley; 7-a grabbing mechanism pulley; 8-a first trolley pulley; 9-a steel wire rope supporting wheel; 10-a first diverting pulley; 11-a second diverting pulley; 12-a rear hinge end of the steel wire; 13-a trolley traction mechanism; 14-a grabbing mechanism; 15-a detachable rope skipping prevention baffle; 16-fixing a pin shaft; 17-pulley box body
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. 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 devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The pipe piece hoisting structure comprises a pulley box, a skeleton beam 3, a hoisting oil cylinder 4, a pipe piece picking device and double steel wire ropes 2, wherein the use of the double steel wire ropes 2 can bring more stable and higher-load technical effects;
the hoisting oil cylinder 4 is arranged on the skeleton beam 3, the skeleton beam 3 is provided with a first trolley pulley 8, a second trolley pulley 6 and a duct piece picking device, the duct piece picking device is arranged between the first trolley pulley 8 and the second trolley pulley 6, the hoisting oil cylinder 4 is arranged on the left side of the duct piece grabbing device, the hoisting oil cylinder 4 is provided with an oil cylinder pulley 5, the skeleton beam 3 on the left side of the hoisting oil cylinder 4 is provided with a steel wire front hinge end 1, the right side of the duct piece picking device is provided with a steel wire rear hinge end 12, and the hoisting oil cylinder 4 is arranged on the side surface of the skeleton beam 3, so that space can be saved;
as shown in fig. 6, the pulley box is arranged on the right side of the skeleton beam 3, the pulley box comprises a pulley box body 17, a detachable rope skipping prevention baffle 15, a fixed pin 16, a first steering pulley 10 and a second steering pulley 11, the detachable rope skipping prevention baffle 15 is arranged at the upper end and the lower end of the pulley box body 17, the first steering pulley 10 and the second steering pulley 11 are connected with the pulley box body 17 through the fixed pin 16, the axial heights of the first steering pulley 10 and the second steering pulley 11 are the same, the radiuses of the first steering pulley 10 and the second steering pulley 11 are different, so that the trend dimension change of the steel wire rope is realized, the rope skipping is not easy, and the structure is compact;
the double steel wire rope 2 comprises a first steel wire rope and a second steel wire rope; the first steel wire rope is sequentially connected with a steel wire rear hinge end 12, an oil cylinder pulley 5, a first steering pulley 10, a first trolley pulley 8, a duct piece picking mechanism, a second trolley pulley 6 and a steel wire front hinge end 1; the second steel wire rope is sequentially connected with a steel wire rear hinge end 12, an oil cylinder pulley 5, a second steering pulley 11, a first trolley pulley 8, a duct piece picking mechanism, a second trolley pulley 6 and a steel wire front hinge end 1
The first trolley pulley 8, the second trolley pulley 6 and the duct piece pickup device are arranged between the steel wire front hinge end 1 and the pulley box.
As shown in fig. 4, the segment pick-up device includes a trolley frame body, a trolley traction mechanism 13, a gripping mechanism 14 and a gripping mechanism pulley 7, the gripping mechanism pulley 7 is disposed above the trolley frame body, the trolley traction mechanism 13 is disposed in front of the trolley frame body, and the gripping mechanism 14 is disposed below the trolley frame body.
The first steel wire rope and the second steel wire rope are connected with a duct piece pickup device through the grabbing mechanism pulley 7, a steel wire rope supporting wheel 9 is arranged between the first steering pulley 10 and the first trolley pulley 8, and the first steel wire rope and the second steel wire rope are connected with the grabbing mechanism pulley 7 through the steel wire rope supporting wheel 9.
The trolley traction mechanism 13 is of a parallel hinge structure, so that the stress on two sides can be balanced, and the problem of asynchronism under the condition of double traction is solved.
The double steel wire rope 2 is fixedly connected with the steel wire rear hinge end 12 and the steel wire front hinge end 1, and the distance between the first diverting pulley 10 and the second diverting pulley 11 is equal to the radius difference.
The working mode of this example
The lifting structure takes a hydraulic cylinder as power, takes a double steel wire rope 2 and a pulley block as a transmission mode, and realizes the lifting and lifting of the pipe piece by driving the pipe piece grabbing mechanism.
After being installed and fixed from a steel wire rear hinge end 12, the double steel wire ropes 2 are distributed along the skeleton beam 3, pass through a first steering pulley 10 and a second steering pulley 11 respectively after bypassing an oil cylinder pulley 5 arranged at the head of a hoisting oil cylinder 4, and are fixed on a pulley box body 17 by using a fixed pin 16, are arranged side by side along the skeleton beam 3 and are 90 degrees with the oil cylinder pulley 5, the arrangement heights are the same but different, the radius difference of the first steering pulley 10 and the second steering pulley 11 is equal to the distance between double grooves of the pulleys, so that the trend dimension change of the steel wire ropes is realized, the ropes are difficult to jump, and the structure is compact.
After being transmitted from the diverting pulley box, the double steel wire ropes 2 pass through the steel wire supporting wheels 9 and enter the first trolley pulley 8, the duct piece grabbing device and the second trolley pulley.
The segment picking device is 90 degrees with the diverting pulley, so that the second dimension conversion is realized. The gripping mechanism pulley 7 is placed on the double wire rope 2 to form a movable pulley structure. When the lifting oil cylinder 4 stretches out, the oil cylinder pulley 5 moves forwards, the double steel wire ropes 2 are pulled downwards under the action of the self weight of the grabbing mechanism 14, and the grabbing mechanism 14 moves downwards; when the lifting oil cylinder 4 returns to the original position, the oil cylinder pulley 5 pulls the double steel wire ropes 2 backwards, and the grabbing mechanism 14 ascends. Meanwhile, the structure can be used for walking while hoisting, when the pipe piece pickup device is subjected to traction force, the pipe piece pickup device moves along the walking track of the skeleton beam, and the trolley pulley block and the grabbing mechanism pulley 7 roll on the steel wire rope to advance, so that the grabbing mechanism can walk more stably under the condition of carrying.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The utility model provides a section of jurisdiction hoist and mount play to rise structure which characterized in that: comprises a pulley box, a skeleton beam (3), a hoisting oil cylinder (4), a segment picking device and a double steel wire rope (2);
the hoisting oil cylinder (4) is arranged on the skeleton beam (3), a first trolley pulley (8), a second trolley pulley (6) and a duct piece picking device are arranged on the skeleton beam (3), the duct piece picking device is arranged between the first trolley pulley (8) and the second trolley pulley (6), the hoisting oil cylinder (4) is arranged on the left side of the duct piece picking device, an oil cylinder pulley (5) is arranged on the hoisting oil cylinder (4), a steel wire front hinge end (1) is arranged on the skeleton beam (3) on the left side of the hoisting oil cylinder (4), and a steel wire rear hinge end (12) is arranged on the right side of the duct piece picking device;
the pulley box is arranged on the right side of the skeleton beam (3), the pulley box comprises a pulley box body (17), a detachable rope skipping prevention baffle (15), a fixed pin shaft (16), a first steering pulley (10) and a second steering pulley (11), the detachable rope skipping prevention baffle (15) is arranged at the upper end and the lower end of the pulley box body (17), the first steering pulley (10) and the second steering pulley (11) are connected with the pulley box body (17) through the fixed pin shaft (16), the axial heights of the first steering pulley (10) and the second steering pulley (11) are the same, and the radiuses of the first steering pulley (10) and the second steering pulley (11) are different;
the double steel wire ropes (2) comprise first steel wire ropes and second steel wire ropes;
the first steel wire rope is sequentially connected with the steel wire rear hinge end (12), the oil cylinder pulley (5), the first steering pulley (10), the first trolley pulley (8), the pipe piece pickup device, the second trolley pulley (6) and the steel wire front hinge end (1);
the second steel wire rope is sequentially connected with the rear steel wire hinge end (12), the oil cylinder pulley (5), the second steering pulley (11), the first trolley pulley (8), the pipe piece pickup device, the second trolley pulley (6) and the front steel wire hinge end (1)
The first trolley pulley (8), the second trolley pulley (6) and the duct piece pickup device are arranged between the steel wire front hinge end (1) and the pulley box.
2. The duct piece hoisting structure according to claim 1, wherein: the pipe piece pickup device comprises a trolley frame body, a trolley traction mechanism (13), a grabbing mechanism (14) and grabbing mechanism pulleys (7), wherein the grabbing mechanism pulleys (7) are arranged above the trolley frame body, the trolley traction mechanism (13) is arranged in front of the trolley frame body, and the grabbing mechanism (14) is arranged below the trolley frame body.
3. The duct piece hoisting structure according to claim 2, wherein: the first steel wire rope and the second steel wire rope are connected with the pipe piece pickup device through the grabbing mechanism pulley (7).
4. A segment lifting structure according to claim 3, wherein: a steel wire rope supporting wheel (9) is arranged between the first steering pulley (10) and the first trolley pulley (8), and the first steel wire rope and the second steel wire rope are connected with the grabbing mechanism pulley (7) through the steel wire rope supporting wheel (9).
5. The duct piece hoisting structure according to claim 2, wherein: the trolley traction mechanism (13) is provided with a hinge structure at the left side and the right side.
6. The duct piece hoisting structure according to claim 5, wherein: the trolley traction mechanism (13) is of a parallel hinged structure.
7. The duct piece hoisting structure according to claim 1, wherein: the double steel wire ropes (2) are fixedly connected with the rear steel wire hinge ends (12) and the front steel wire hinge ends (1).
8. The duct piece hoisting structure according to claim 1, wherein: the first diverting pulley (10) and the second diverting pulley (11) are spaced apart by a distance equal to the difference in radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711367517.4A CN107916946B (en) | 2017-12-18 | 2017-12-18 | Segment lifting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711367517.4A CN107916946B (en) | 2017-12-18 | 2017-12-18 | Segment lifting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107916946A CN107916946A (en) | 2018-04-17 |
| CN107916946B true CN107916946B (en) | 2023-11-24 |
Family
ID=61893465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711367517.4A Active CN107916946B (en) | 2017-12-18 | 2017-12-18 | Segment lifting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107916946B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202322100U (en) * | 2011-11-16 | 2012-07-11 | 中联重科股份有限公司 | Trolley horizontal amplitude tower crane and trolley lifting appliance combined device |
| CN102808633A (en) * | 2012-08-27 | 2012-12-05 | 三一重工股份有限公司 | Shield tunneling machine and duct piece conveying device thereof |
| CN103410531A (en) * | 2013-08-19 | 2013-11-27 | 中国铁建重工集团有限公司 | Duct piece reshipment device for shield tunnel |
| CN104265334A (en) * | 2014-09-30 | 2015-01-07 | 辽宁三三工业有限公司 | Fast unloading device for segments of shield machine |
| CN104405421A (en) * | 2014-09-30 | 2015-03-11 | 辽宁三三工业有限公司 | Minimum-altitude duct piece conveying system applicable to minitype shield machine |
| CN206753628U (en) * | 2017-03-24 | 2017-12-15 | 中铁工程装备集团有限公司 | A kind of novel segment lifting device |
| CN207761684U (en) * | 2017-12-18 | 2018-08-24 | 辽宁三三工业有限公司 | A kind of section of jurisdiction lifting raising structure |
-
2017
- 2017-12-18 CN CN201711367517.4A patent/CN107916946B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202322100U (en) * | 2011-11-16 | 2012-07-11 | 中联重科股份有限公司 | Trolley horizontal amplitude tower crane and trolley lifting appliance combined device |
| CN102808633A (en) * | 2012-08-27 | 2012-12-05 | 三一重工股份有限公司 | Shield tunneling machine and duct piece conveying device thereof |
| CN103410531A (en) * | 2013-08-19 | 2013-11-27 | 中国铁建重工集团有限公司 | Duct piece reshipment device for shield tunnel |
| CN104265334A (en) * | 2014-09-30 | 2015-01-07 | 辽宁三三工业有限公司 | Fast unloading device for segments of shield machine |
| CN104405421A (en) * | 2014-09-30 | 2015-03-11 | 辽宁三三工业有限公司 | Minimum-altitude duct piece conveying system applicable to minitype shield machine |
| CN206753628U (en) * | 2017-03-24 | 2017-12-15 | 中铁工程装备集团有限公司 | A kind of novel segment lifting device |
| CN207761684U (en) * | 2017-12-18 | 2018-08-24 | 辽宁三三工业有限公司 | A kind of section of jurisdiction lifting raising structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107916946A (en) | 2018-04-17 |
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