CN107420111B - Adjust the auxiliary device and its construction of shield machine hinged oil cylinder hinge angle - Google Patents
Adjust the auxiliary device and its construction of shield machine hinged oil cylinder hinge angle Download PDFInfo
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- CN107420111B CN107420111B CN201710567043.1A CN201710567043A CN107420111B CN 107420111 B CN107420111 B CN 107420111B CN 201710567043 A CN201710567043 A CN 201710567043A CN 107420111 B CN107420111 B CN 107420111B
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- oil cylinder
- cushion block
- hinged oil
- shield machine
- hinged
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- 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.)
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- 238000010276 construction Methods 0.000 title claims abstract description 18
- 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 claims abstract description 11
- 238000005201 scrubbing Methods 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 4
- 230000005641 tunneling Effects 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 5
- 239000004917 carbon fiber Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 241001133184 Colletotrichum agaves Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012407 engineering method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/093—Control of the driving shield, e.g. of the hydraulic advancing cylinders
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Actuator (AREA)
Abstract
The invention discloses a kind of auxiliary devices and its construction for adjusting shield machine hinged oil cylinder hinge angle, including：Basic cushion block connects to form hollow cylindrical structure for two detachable semicircular cylinders, and the basis cushion block is sheathed on outside hinged oil cylinder piston rod；Several small cushion blocks, the small cushion block are rectangular sheet structure, and one side of the small cushion block is recessed inwardly to form groove, and the groove is set as to be fastened on hinged oil cylinder piston rod.The present invention hinged oil cylinder failure after can make hinge system for shield machine according to construction requirement carry out using device, effectively the cylinder body of hinged oil cylinder is connect with oil cylinder pedestal, so that hinge angle reaches desired value, guarantee that the influence to cost and duration control can be greatly reduced after hinged oil cylinder breaks down on a large scale.
Description
Technical field
The present invention relates to the shield construction fields in tunnel construction technology.It is more particularly related to one
Kind adjusts the auxiliary device and its construction of shield machine hinged oil cylinder hinge angle.
Background technique
With the extensive development of domestic subway construction, shield-tunneling construction engineering method due to have safely, quickly, wide adaptability etc.
Feature and Subway Tunnel construction in be widely used.Mainstream shield machine all must during small curve is constructed in the world at present
It must just can guarantee the good of posture using hinged.So adjustment and song when articulated system breaks down, to attitude of shield machine
Line segment influences very big caused by constructing.And articulated system is all mounted in shield body, shield body inner space is more narrow, so right
In most of shield machine, after hinged oil cylinder failure, the difficulty for splitting out maintenance is big, and the dismounting of hinged oil cylinder, maintenance, peace
The dress period is long, increases construction cost and construction period indirectly.
Summary of the invention
It is an object of the invention to solve at least the above problems, and provide the advantages of at least will be described later.
A further object of the invention is not can be carried out after breaking down for shield machine major part hinged oil cylinder hingedly,
And the problem that maintenance difficulty is big, providing one kind can make hinge system for shield machine according to construction requirement after hinged oil cylinder failure
Carry out using device, the cylinder body of hinged oil cylinder is connect with oil cylinder pedestal effectively, to adjust hinged oil cylinder elongation, is made
It obtains hinge angle and reaches desired value, guarantee to greatly reduce after hinged oil cylinder breaks down on a large scale to cost and duration control
It influences.
In order to realize these purposes and other advantages according to the present invention, a kind of adjusting shield machine hinged oil cylinder hinge is provided
The auxiliary device of angle is connect, including：
Basic cushion block connects to form hollow cylindrical structure for two detachable semicircular cylinders, the basis cushion block set
Outside hinged oil cylinder piston rod；
Several small cushion blocks, the small cushion block be rectangular sheet structure, one side of the small cushion block be recessed inwardly to be formed it is recessed
Slot, the groove are set as to be fastened on hinged oil cylinder piston rod.
Preferably, two semicircular cylinder both ends interconnected extend outward to form otic placode along the direction of its basal diameter,
And two semicircular cylinders are connected by otic placode.
Preferably, wherein the otic placode of side is hinged on two semicircular cylinders, and the otic placode of the other side is bolted.
Preferably, the first end of semicircular cylinder towards hinged oil cylinder pedestal has chamfering, and the chamfering can be with hinged oil cylinder base
Seat cooperation contact.
Preferably, second end opposite with its first end on the semicircular cylinder is fixed with integrally formed perpendicular to otic placode
Gusset is symmetrical arranged on the gusset of one of semicircular cylinder there are two the first round tube hole, is symmetrical arranged that there are two the on small cushion block
Two round tube holes, two first round tube holes and the second round tube hole correspondence are fixed by spring holder.
Preferably, antifriction scrubbing pad is installed on the basic cushion block inner wall and the groove inner wall.
The present invention also provides a kind of constructions using auxiliary device, include the following steps：
Step 1: the shield machine thrust oil cylinder that bounces back under pressure maintaining mode, separates cutter head of shield machine with face；
Step 2: stretching out hinged oil cylinder to more than requiring to stretch out size, and basic cushion block is sheathed on to the work of hinged oil cylinder
On stopper rod, then it is fastened on hinged oil cylinder piston rod by the sized small cushion block for selecting corresponding thickness of live actual requirement；
It is tunneled at a slow speed Step 3: opening Thrust System of Shield Tunneling Machines, by the hinged oil cylinder pressure of stretching under soil body reaction force
It returns back to top extremely on cushion block, forms the deflection of fitting driving axis.
Preferably, in the step 1, the distance of the propelling cylinder for the shield machine that bounces back is 1-3cm.
The present invention is include at least the following beneficial effects：
The invention discloses one kind cannot be such that hinged oil cylinder locks in setting value after hinged oil cylinder largely breaks down
When auxiliary hinge oil cylinder overhang be maintained at the device of setting value, by the way that the connection of hinged oil cylinder inlet and outlet of fuel channel is enable failure oil cylinder
Enough oil cylinder is stretched out with rodless cavity pressure difference by rod chamber, and according to the actual range and piston rod of cylinder block and pedestal
It is big to solve maintenance difficulty after hinged oil cylinder goes wrong in existing shield machine for the processing and fabricatings such as size basis cushion block and small cushion block
The problem of.Using cushion block seized piston bar, prevent oil cylinder from being fully retracted and causing the generation of hinge angle.According to cushioning cushion block
The size of the adjustable hinge angle of difference of height, to achieve the purpose that turning and attitude regulation.The present invention can be existing
During the construction of field, when hinged oil cylinder breaks down and is unable to normal use, hinge angle is adjusted, and cost is relatively low, has
Practicability, versatility, advantage easy to operate.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the topology view of basic cushion block of the invention；
Fig. 2 is small cushion block topology view of the present invention；
Fig. 3 is the topology view of auxiliary device of the present invention；
Fig. 4 is small cushion block internal structure view of the invention；
Fig. 5 is shield machine structural schematic diagram of the invention.
The cylinder body of 1- hinged oil cylinder, 2- hinged oil cylinder piston rod, the pedestal of 3- hinged oil cylinder, 4,5- semicircular cylinder, 6- pulvinulus
Block, 7- hinge, 8- bolt, 9- spring holder, 10- antifriction scrubbing pad, 11- groove, the second round tube hole of 12-, the circle of 13- first are logical
Hole, 14- otic placode, 15- gusset, 16- chamfering, the basis 17- cushion block, the outer grid layer of 18- first, 19- carbon fiber pipe, 20- promote oil
Cylinder, 21- hinged oil cylinder, 22- shield machine.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
In the description of the present invention, term " transverse direction ", " longitudinal direction ", "upper", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is orientation based on the figure or position
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, is not that device or the element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
As shown in Figs. 1-5, the present invention provides a kind of auxiliary device for adjusting shield machine hinged oil cylinder hinge angle, including：
Basic cushion block 17 forms hollow cylindrical structure, the basis for two detachable connections of semicircular cylinder 4 and 5
Cushion block 17 is sheathed on outside hinged oil cylinder piston rod 2.Several small cushion blocks 6 are rectangular sheet structure, the small cushion block 6 one
Side is recessed inwardly to form groove 11, and the groove 11 is set as can engaging that (diameter of the center position of groove 11 is slightly larger than
The diameter of hinged oil cylinder piston rod 2) on hinged oil cylinder piston rod 2.When in use, based on basic cushion block 17, Ke Yigen
Hinge angle is adjusted according to the quantity of the needs constantly plus-minus small cushion block 6 of angle, 6 weight of small cushion block is smaller convenient for operation.
Further, in the auxiliary device of the adjusting shield machine hinged oil cylinder hinge angle, two semicircular cylinders 4 and 5
Both ends interconnected extend outward to form otic placode 14 along the direction of its basal diameter, and two semicircular cylinders 4 and 5 pass through otic placode 14
Connection.
Further, in the auxiliary device of the adjusting shield machine hinged oil cylinder hinge angle, two semicircular cylinders 4 and 5
On wherein side otic placode 14 it is hinged by hinge 7, the otic placode of the other side is connected by bolt 8, hinged mutually to tie with being bolted
The connection type of conjunction keeps the dismantling connection between described two semicircular cylinders more convenient.
Further, the first end of semicircular cylinder towards hinged oil cylinder pedestal 3 has chamfering 16, and the chamfering 16 can be with hinged oil
The cooperation contact of cylinder pedestal 3, increases the compactness of semicircular cylinder and oil cylinder pedestal 3, is more uniformly stressed it.
Further, second end opposite with its first end on the semicircular cylinder is fixed with integrally formed perpendicular to otic placode
Gusset 15 is symmetrical arranged on the gusset 15 of one of semicircular cylinder there are two the first round tube hole 13, is symmetrically arranged on small cushion block 6
Two the second round tube holes 12, two first round tube holes 13 and the second round tube hole 12 are corresponding fixed by spring holder 9, bullet
Spring positioning pin 9 can limit free movement degree of the small cushion block 6 on piston rod 2, realize the Dual positioning of small cushion block 6, make small cushion block 6
Positioning become more accurate, conveniently.
Further, it is installed with antifriction scrubbing pad on basic 17 inner wall of cushion block and the groove inner wall, due to base mat
Block 17 and small cushion block can slide in pressurized process on oil cylinder, in this way may due to the friction damage oil cylinder between contact surface,
Set antifriction scrubbing pad 10 can prevent basic cushion block 17 and small cushion block from damaging in pressurized process to oil cylinder.
When the application is directed in shield machine tunneling process most of hinged oil cylinder failure, shield machine hinged oil cylinder
Posture be unable to adjust automatically, at this moment need the mode for artificially adding cushion block to control hinged oil cylinder stroke, to adjust hinge
The size of angle is connect, to achieve the purpose that attitude regulation or turning.Required pad thickness is calculated before cushioning cushion block, is calculated
Stop (stretching out herein for rough oil cylinder of estimating after hinged oil cylinder is reached the distance that required cushioning cushion block can pad into afterwards
Distance), it is fixed after basic cushion block 17 is padded above with bolt, according to the pulvinulus of the size addition different-thickness and quantity that calculate
Block is fixed between small cushion block and basic cushion block 17 with spring holder, it can be moved backward automatically after hinged oil cylinder stress, until
Hinged oil cylinder reaches setting value (overall thickness of added basis cushion block 17 and small cushion block) at a distance from pedestal 3 and stops afterwards, can be effective
Prevent the abrasion to piston rod 2.According to execute-in-place experience, the thickness range that required cushion block is adjusted between 70mm-120mm,
Design basis cushion block 17 has the type of 5mm, 6mm, 7mm, 8mm, 9mm to distinguish several pieces with a thickness of 60mm, small cushion block thickness.
Since the thickness of small cushion block 6 is in 5-9mm, thinner thickness is moved backward after hinged oil cylinder stress, what small cushion block was subject to
Extruding force is big, and especially small cushion block offers around the second round tube hole 12, if selecting common material production, the of small cushion block
It is easily deformed around two round tube holes 12, small cushion block is whole to cause to adjust that inaccurate, service life is shorter there is also abrasion severity
Problem, designs a kind of light weight, and the big pulvinulus block structure of rigidity, intensity can effectively solve the problem that the above problem.
The small cushion block includes：First outer grid layer 18 and the second outer grid layer, with the small cushion block (as shown in Figure 2)
Shape it is identical, between the first outer grid layer and the second outer grid layer have certain distance, in the described first outer grid layer
And second be equipped with carbon fiber pipe 19 between outer grid layer, the first outer grid layer or the second outer grid layer after filling carbon fiber pipe
(porosity is the overall porosity of carbon fiber pipe and the first outer grid layer or the second outer grid layer to porosity 8%-15%, and not
Calculate the hollow spaces inside the second round tube hole and carbon fiber pipe), later outside the first outer grid layer and the second outer grid layer
Exodermis being coated, the exodermis is made of at least 3 layers of carbon cloth, wherein small cushion block is offering the second through hole,
The periphery of second through-hole is coated at least 3 layers of carbon cloth, to improve the breaking resistance around the second through-hole, and is able to satisfy pulvinulus
Block can resist the reaction force that shield machine retraction and face are given in the case where relatively small thickness, keep design thickness,
It is wear-resistant.
The present invention also provides a kind of constructions using auxiliary device, include the following steps：
Step 1: the shield machine thrust oil cylinder 20 that bounces back under pressure maintaining mode, separates cutter head of shield machine with face, preferably
Retraction shield machine propelling cylinder distance be 1-3cm, in the progradation of constructing tunnel, hinged oil cylinder 21 goes out shield machine
When existing problem, the retraction of small distance can reduce the release resistance of hinged oil cylinder, make cutter head of shield machine under soil pressure effect
It is separated with face, to reduce energy consumption.
Step 2: stretching out hinged oil cylinder to more than requiring to stretch out size, rule of thumb hinged oil is adjusted when practical operation
The stroke of cylinder piston rod 2, and basic cushion block 17 is sheathed on the piston rod 2 of hinged oil cylinder, then pass through live actual requirement
The sized small cushion block for selecting corresponding thickness is fastened on hinged oil cylinder piston rod 2.
It is tunneled at a slow speed Step 3: opening 22 propulsion system of shield machine, by the hinged oil cylinder of stretching under soil body reaction force
Cylinder body 1 push back dieback on cushion block, the deflection of fitting driving axis is formed, to solve in existing shield machine hinged oil
The big problem of maintenance difficulty after cylinder goes wrong.Using cushion block seized piston bar 2, lead to oil cylinder from being fully retracted hingedly
The generation of angle.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (6)
1. a kind of auxiliary device for adjusting shield machine hinged oil cylinder hinge angle, which is characterized in that including：
Basic cushion block connects to form hollow cylindrical structure for two detachable semicircular cylinders, and the basis cushion block is sheathed on
Outside hinged oil cylinder piston rod；Two semicircular cylinder both ends interconnected extend outward to form otic placode along the direction of its basal diameter,
And two semicircular cylinders are connected by otic placode；Wherein the otic placode of side is hinged on two semicircular cylinders, and the otic placode of the other side passes through bolt
Connection；
Several small cushion blocks, the small cushion block are rectangular sheet structure, and one side of the small cushion block is recessed inwardly to form groove, institute
Groove is stated to be set as to be fastened on hinged oil cylinder piston rod.
2. adjusting the auxiliary device of shield machine hinged oil cylinder hinge angle as described in claim 1, which is characterized in that semicircular cylinder
There is chamfering towards the first end of hinged oil cylinder pedestal, the chamfering can cooperate with hinged oil cylinder pedestal to be contacted.
3. adjusting the auxiliary device of shield machine hinged oil cylinder hinge angle as claimed in claim 2, which is characterized in that described half
The second end opposite with its first end is fixed with integrally formed gusset, the muscle of one of semicircular cylinder perpendicular to otic placode on cylinder
It is symmetrical arranged on plate there are two the first round tube hole, is symmetrical arranged that there are two the second round tube hole, two first circles on small cushion block
Through-hole and the second round tube hole correspondence are fixed by spring holder.
4. adjusting the auxiliary device of shield machine hinged oil cylinder hinge angle as described in claim 1, which is characterized in that the base
Antifriction scrubbing pad is installed on plinth cushion block inner wall and the groove inner wall.
5. a kind of construction using auxiliary device, which is characterized in that include the following steps：
Step 1: the shield machine thrust oil cylinder that bounces back under pressure maintaining mode, separates cutter head of shield machine with face；
Step 2: stretching out hinged oil cylinder to more than requiring to stretch out size, and basic cushion block is sheathed on to the piston rod of hinged oil cylinder
On, then be fastened on hinged oil cylinder piston rod by the sized small cushion block for selecting corresponding thickness of live actual requirement；It is described
Basic cushion block is that two detachable semicircular cylinders connect to form hollow cylindrical structure, and the small cushion block is rectangular sheet structure,
One side of the small cushion block is recessed inwardly to form groove, and the groove is set as to be fastened on hinged oil cylinder piston rod；
It is tunneled at a slow speed Step 3: opening Thrust System of Shield Tunneling Machines, the hinged oil cylinder of stretching is pushed back into top under soil body reaction force
Extremely on cushion block, the deflection of fitting driving axis is formed.
6. utilizing the construction of auxiliary device as claimed in claim 5, which is characterized in that in the step 1, bounce back shield
The distance of the propelling cylinder of structure machine is 1-3cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710567043.1A CN107420111B (en) | 2017-07-12 | 2017-07-12 | Adjust the auxiliary device and its construction of shield machine hinged oil cylinder hinge angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710567043.1A CN107420111B (en) | 2017-07-12 | 2017-07-12 | Adjust the auxiliary device and its construction of shield machine hinged oil cylinder hinge angle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107420111A CN107420111A (en) | 2017-12-01 |
| CN107420111B true CN107420111B (en) | 2018-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710567043.1A Active CN107420111B (en) | 2017-07-12 | 2017-07-12 | Adjust the auxiliary device and its construction of shield machine hinged oil cylinder hinge angle |
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| Country | Link |
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| CN (1) | CN107420111B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108678762A (en) * | 2018-07-02 | 2018-10-19 | 中国铁建重工集团有限公司 | A kind of development machine |
| CN109826638B (en) * | 2019-01-24 | 2020-11-03 | 湖南科技大学 | Hydraulic cylinder arrangement control mechanism for shield machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000065505A (en) * | 1998-08-24 | 2000-03-03 | Sumitomo Electric Ind Ltd | Tip point stroke meter |
| CN104153777A (en) * | 2014-08-04 | 2014-11-19 | 辽宁通用煤机装备制造股份有限公司 | Mining rock roadway quick tunneling machine |
| CN106869951A (en) * | 2017-03-15 | 2017-06-20 | 济南中铁重工轨道装备有限公司 | A kind of shield machine self-interacting type single cylinder supports boots structure |
| CN206942767U (en) * | 2017-07-12 | 2018-01-30 | 中交第二航务工程局有限公司 | Adjust the servicing unit of shield machine hinged oil cylinder hinge angle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3249388B2 (en) * | 1996-04-25 | 2002-01-21 | 敏雄 向井 | Underground pipe laying equipment |
-
2017
- 2017-07-12 CN CN201710567043.1A patent/CN107420111B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000065505A (en) * | 1998-08-24 | 2000-03-03 | Sumitomo Electric Ind Ltd | Tip point stroke meter |
| CN104153777A (en) * | 2014-08-04 | 2014-11-19 | 辽宁通用煤机装备制造股份有限公司 | Mining rock roadway quick tunneling machine |
| CN106869951A (en) * | 2017-03-15 | 2017-06-20 | 济南中铁重工轨道装备有限公司 | A kind of shield machine self-interacting type single cylinder supports boots structure |
| CN206942767U (en) * | 2017-07-12 | 2018-01-30 | 中交第二航务工程局有限公司 | Adjust the servicing unit of shield machine hinged oil cylinder hinge angle |
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| Publication number | Publication date |
|---|---|
| CN107420111A (en) | 2017-12-01 |
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