CN108397207A - The device that the shield tail of shield prototype is sealed - Google Patents
The device that the shield tail of shield prototype is sealed Download PDFInfo
- Publication number
- CN108397207A CN108397207A CN201810246921.4A CN201810246921A CN108397207A CN 108397207 A CN108397207 A CN 108397207A CN 201810246921 A CN201810246921 A CN 201810246921A CN 108397207 A CN108397207 A CN 108397207A
- Authority
- CN
- China
- Prior art keywords
- shield
- prototype
- tail
- jurisdiction
- ball bowl
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 40
- 239000010687 lubricating oil Substances 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 229920000459 Nitrile rubber Polymers 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005255 carburizing Methods 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 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
- 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
- E21D9/0635—Tail sealing means, e.g. used as end shuttering
-
- 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
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
Landscapes
- 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)
- Sealing Devices (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention provides a kind of devices that the shield tail to shield prototype is sealed.The device includes：Shield tail, sealing element, ball bowl and the shield model section of jurisdiction of shield prototype, two annular seals are bonded in the shield tail of the shield prototype, the shield model pipe on piece equally bonds two annular seals, a cavity is collectively formed in the shield tail of the shield prototype and shield model section of jurisdiction, all fill sealing lubricating oil in gap between the shield tail of the mounting ball bowl in the cavity, the ball bowl and the shield prototype, shield model section of jurisdiction.The device of the invention is simple in structure, compact, cheap, facilitate it is handy, and convenient for promote and actual production use；The tail sealing performance that can guarantee shield prototype under 2.0Mpa high hydraulic pressure environment, the theoretical research to be tunneled safely for shield under high hydraulic condition provide experimental basis.
Description
Technical field
The present invention relates to tunnels and underground engineering technical field more particularly to a kind of shield tail progress to shield prototype are close
The device of envelope.
Background technology
Currently, in engineering field, tunnel construction is like a raging fire, and Municipal rail traffic, the more river main line of communication over strait are built
If in the ascendant.It is increasing to subway tunnel, vcehicular tunnel demand, and the construction environment that builder is faced is also increasingly multiple
Miscellaneous, shield construction becomes optimal form of construction work under complex geological condition.
Using Qiongzhou strait tunnel as technical background, shield tunnel construction faces lot of challenges, wherein how reductase 12 MPa
The problems such as TBM's position control, excavation face stability contorting, is urgently to be resolved hurrily under practice of construction environment, and solution 2Mpa high hydraulic pressure.
Currently, domestic many scholars carried out some simulation tests for the driving environment of shield machine, there is field test
There are model test and numerical simulation, but not high to the reduction degree of shield tunneling process.Shield prototype is relative to true shield machine
Size is too small, can not be sealed to shield tail in such a way that shield tail brush fills grease.Therefore current shield prototype all uses
The form of ejector sleeve machine carries out simulation propulsion, and the form of ejector sleeve machine may result in shield prototype can only be along straight ahead, can not
Carry out the adjustment of shield attitude.
How to ensure leakproofness and normal operation of the shield prototype under high hydraulic pressure environment, while can also have shield
The functions such as structure pose adjustment solve the problems, such as that the tail sealing of shield prototype is crucial.Currently, one kind is in high hydraulic pressure ring not yet
The method that shield prototype shield tail is effectively sealed under border.
Invention content
The embodiment provides a kind of devices that the shield tail to shield prototype is sealed, to solve existing skill
The problem of art.
To achieve the goals above, this invention takes following technical solutions.
The device that a kind of shield tail to shield prototype is sealed, including：The shield tail of shield prototype, sealing element, ball
Bowl and shield model section of jurisdiction, two annular seals are bonded in the shield tail of the shield prototype, and the shield model pipe on piece is also glued
Two annular seal of knot, a cavity is collectively formed in the shield tail of the shield prototype and shield model section of jurisdiction, in the sky
It all fills in gap between the shield tail of mounting ball bowl in chamber, the ball bowl and the shield prototype, shield model section of jurisdiction
Sealing lubricating oil.
Further, the sealing element is located in the cavity, and the ball bowl is squeezed with the sealing element in the cavity
Pressure reaches sealing effect.
Further, the sealing element is formed by nitrile rubber and polyurethane by die casting.
Further, the ball bowl is formed by 45# steel through ovennodulation, smart car and carburizing.
Further, it is connected by 4 posture adjustment oil cylinders between the shield prototype and shield model section of jurisdiction.
Further, 4 posture adjustment oil cylinders connect shield prototype in a manner of tumbler bearing, and connecting portion is in shield mould
The rear portion of type machine；4 posture adjustment oil cylinders connect shield model section of jurisdiction in a manner of hold-down support, and connecting portion is in shield model
The front end of section of jurisdiction.
Further, make shield prototype using ball bowl as the rotating fulcrum in steering procedure by adjusting posture adjustment oil cylinder
It realizes and turns to, detect the sealing effect of the shield tail of the shield prototype.
By embodiments of the invention described above provide technical solution it can be seen from the embodiment of the present invention to high hydraulic pressure shield
The apparatus structure that the shield tail of prototype is sealed is simple, compact, cheap, facilitate it is handy, and convenient for promoting and practical
It produces and uses；The tail sealing performance that can guarantee shield prototype under 2.0Mpa high hydraulic pressure environment, under high hydraulic condition
The theoretical research of shield driving provides experimental basis.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without creative efforts, others are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 and Fig. 2 is cuing open for the device that a kind of shield tail to shield prototype provided in an embodiment of the present invention is sealed
Face structural schematic diagram.
Specific implementation mode
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that is used in the specification of the present invention arranges
It refers to there are the feature, integer, step, operation, element and/or component, but it is not excluded that presence or addition to take leave " comprising "
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or coupling.Wording used herein
"and/or" includes any cell of one or more associated list items and all combines.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific terminology) there is meaning identical with the general understanding of the those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, will not be with idealizing or the meaning of too formal be explained.
For ease of the understanding to the embodiment of the present invention, done further by taking several specific embodiments as an example below in conjunction with attached drawing
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
An embodiment of the present invention provides a kind of device that the shield tail to shield prototype is sealed, the device not only structure
It is compact, and used with actual production convenient for promoting.The device may be implemented shield driving model under 2Mpa high hydraulic conditions and try
The tail sealing effect tested, to provide experimental basis for the theoretical research of shield driving tail sealing under high hydraulic condition.
Fig. 1 and Fig. 2 is the cross-sectional view for the device that the above-mentioned shield tail to high hydraulic pressure shield prototype is sealed,
Including：The shield tail 1 of shield prototype, sealing element 2, ball bowl 3, shield model section of jurisdiction 4 and sealing lubricating oil.
Two annular seals 2 are bonded in the shield tail 1 of the shield prototype, and two rings are equally bonded on shield model section of jurisdiction 4
Sealing element 2.Sealing element 2 is bonded by nitrile rubber Special seal glue.Sealing element 2 is passed through by nitrile rubber and polyurethane
Die casting is formed.
Those skilled in the art will be understood that the material type of above-mentioned sealing element 2 is only for example, other are existing or from now on
The material type for the sealing element 2 being likely to occur such as is applicable to the embodiment of the present invention, should also be included in the scope of the present invention with
It is interior, and be incorporated herein by reference herein.
Shield prototype is connected with shield model section of jurisdiction by 4 posture adjustment oil cylinders, the shield tail and shield of shield prototype
A cavity is collectively formed in model section of jurisdiction, and a sky is collectively formed in the shield tail 1 of the shield prototype and shield model section of jurisdiction 4
Chamber.
4 posture adjustment oil cylinders connect shield prototype in a manner of tumbler bearing, and connecting portion is at the rear portion of shield prototype.4
A posture adjustment oil cylinder connects shield model section of jurisdiction, front end of the connecting portion in shield model section of jurisdiction in a manner of hold-down support.Posture adjustment
Oil cylinder and shield model section of jurisdiction are all made of cast steel, shield model section of jurisdiction outer diameter 580mm, wall thickness 10mm, long 2300mm.
Mounting ball bowl 3 in the cavities.Ball bowl 3 is formed by 45# steel through ovennodulation, smart car and carburizing.
Those skilled in the art will be understood that the material type of above-mentioned ball bowl 3 is only for example, other are existing or from now on may be used
The material type for the ball bowl 3 that can occur such as is applicable to the embodiment of the present invention, should also be included within the scope of the present invention, and
It is incorporated herein by reference herein.
Sealing element 2 is also disposed in above-mentioned cavity, and ball bowl 3 squeezes in the cavities with sealing element 2 reaches sealing effect, ball bowl
All fill sealing lubrication in gap between gap, ball bowl 3 between 3 and the shield tail 1 of shield prototype and shield mould model section of jurisdiction 4
Oil, the sealing lubricating oil take sealing effect.
When examining the sealing effect of above-mentioned apparatus, it is leading tail sealing device of shield by ball bowl, makes test simulation shield
Structure device realizes steering by a small margin, still ensures that the sealing effect of the shield tail of shield prototype.The steering by a small margin of shield machine
It is to realize that the effect of ball bowl is available to prototype rotating fulcrum in steering procedure by adjusting posture adjustment oil cylinder, protects
Its continuous and smoothly realization steering is demonstrate,proved, while also can guarantee the sealing effect of shield tail.
The device of the invention is equally applicable the shield prototype of the environment under low pressure less than 2.0Mpa hydraulic pressure.
In conclusion the beneficial effect for the device that the shield tail to high hydraulic pressure shield prototype of the embodiment of the present invention is sealed
Fruit is mainly manifested in：
1, apparatus structure is simple, compact, cheap, facilitate it is handy, and convenient for promote and actual production use；
2, device can solve the problems, such as the tail sealing on small size shield prototype；
3, device can guarantee shield prototype tail sealing performance under 2.0Mpa high hydraulic pressure environment, to be high hydraulic condition
The theoretical research of lower shield driving provides experimental basis.
One of ordinary skill in the art will appreciate that：Attached drawing is the schematic diagram of one embodiment, module in attached drawing or
Flow is not necessarily implemented necessary to the present invention.
One of ordinary skill in the art will appreciate that：The component in device in embodiment can describe to divide according to embodiment
It is distributed in the device of embodiment, respective change can also be carried out and be located in one or more devices different from the present embodiment.On
The component for stating embodiment can be merged into a component, can also be further split into multiple subassemblies.
Each embodiment in this specification is described in a progressive manner, identical similar portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments.Especially for device or
For system embodiment, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to method
The part of embodiment illustrates.Apparatus and system embodiment described above is only schematical, wherein the conduct
The unit that separating component illustrates may or may not be physically separated, the component shown as unit can be or
Person may not be physical unit, you can be located at a place, or may be distributed over multiple network units.It can root
According to actual need that some or all of module therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel are without creative efforts, you can to understand and implement.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
Subject to.
Claims (7)
1. the device that a kind of shield tail to shield prototype is sealed, which is characterized in that including：The shield tail of shield prototype,
Sealing element, ball bowl and shield model section of jurisdiction bond two annular seals, the shield model pipe in the shield tail of the shield prototype
On piece also bonds two annular seals, and a cavity is collectively formed in the shield tail of the shield prototype and shield model section of jurisdiction,
Sky between the shield tail of the mounting ball bowl in the cavity, the ball bowl and the shield prototype, shield model section of jurisdiction
Gap all fills sealing lubricating oil.
2. the apparatus according to claim 1, which is characterized in that the sealing element is located in the cavity, the ball bowl with
The sealing element squeezes in the cavity reaches sealing effect.
3. the apparatus of claim 2, which is characterized in that the sealing element passes through mold by nitrile rubber and polyurethane
Casting is formed.
4. the apparatus of claim 2, which is characterized in that the ball bowl is by 45# steel through ovennodulation, smart car and carburizing shape
At.
5. the apparatus of claim 2, which is characterized in that between the shield prototype and shield model section of jurisdiction
It is connected by 4 posture adjustment oil cylinders.
6. device according to claim 5, which is characterized in that 4 posture adjustment oil cylinders connect shield in a manner of tumbler bearing
Structure prototype, connecting portion is at the rear portion of shield prototype；4 posture adjustment oil cylinders connect shield mould in a manner of hold-down support
Type section of jurisdiction, front end of the connecting portion in shield model section of jurisdiction.
7. device according to claim 6, which is characterized in that by adjusting posture adjustment oil cylinder, using ball bowl as steering procedure
In rotating fulcrum, make shield prototype realize turn to, ensure the sealing effect of the shield tail of the shield prototype.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246921.4A CN108397207B (en) | 2018-03-23 | 2018-03-23 | Device for sealing shield tail of shield model machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246921.4A CN108397207B (en) | 2018-03-23 | 2018-03-23 | Device for sealing shield tail of shield model machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108397207A true CN108397207A (en) | 2018-08-14 |
| CN108397207B CN108397207B (en) | 2024-04-16 |
Family
ID=63093073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810246921.4A Active CN108397207B (en) | 2018-03-23 | 2018-03-23 | Device for sealing shield tail of shield model machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108397207B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107307A (en) * | 2019-05-23 | 2019-08-09 | 东北大学 | A kind of device and method of the Thrust System of Shield Tunneling Machines applied to compound stratum |
| CN113290901A (en) * | 2021-01-12 | 2021-08-24 | 优泰科(苏州)密封技术有限公司 | Shield seal forming method |
| CN113752443A (en) * | 2021-09-22 | 2021-12-07 | 中铁工程装备集团有限公司 | Shield tunneling machine hinged sealing piece field joint die and forming method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001073265A1 (en) * | 2000-03-30 | 2001-10-04 | Condat S.A. | Emergency sealant for preventing water from getting into seal tails of tunnelling machines |
| JP2004060233A (en) * | 2002-07-26 | 2004-02-26 | Shimizu Corp | Shield machine and tail seal replacing method of shield machine |
| DE102006056263A1 (en) * | 2005-11-26 | 2007-05-31 | F & B Gmbh Feuerschutz & Baustofftechnik | Sealing paste for sealing the shield tail during shield driving in tunnel construction is in the form of a mineral fiber matrix and consists of a layer material, water, fillers, compounds and a plant oil |
| CN205297583U (en) * | 2016-01-13 | 2016-06-08 | 河南工程学院 | Slurry shield shield tail sealing system |
| CN107605496A (en) * | 2017-08-07 | 2018-01-19 | 北京市市政四建设工程有限责任公司 | A kind of tail sealing device of shield |
| CN207989031U (en) * | 2018-03-23 | 2018-10-19 | 北京交通大学 | The device that the shield tail of shield prototype is sealed |
-
2018
- 2018-03-23 CN CN201810246921.4A patent/CN108397207B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001073265A1 (en) * | 2000-03-30 | 2001-10-04 | Condat S.A. | Emergency sealant for preventing water from getting into seal tails of tunnelling machines |
| JP2004060233A (en) * | 2002-07-26 | 2004-02-26 | Shimizu Corp | Shield machine and tail seal replacing method of shield machine |
| DE102006056263A1 (en) * | 2005-11-26 | 2007-05-31 | F & B Gmbh Feuerschutz & Baustofftechnik | Sealing paste for sealing the shield tail during shield driving in tunnel construction is in the form of a mineral fiber matrix and consists of a layer material, water, fillers, compounds and a plant oil |
| CN205297583U (en) * | 2016-01-13 | 2016-06-08 | 河南工程学院 | Slurry shield shield tail sealing system |
| CN107605496A (en) * | 2017-08-07 | 2018-01-19 | 北京市市政四建设工程有限责任公司 | A kind of tail sealing device of shield |
| CN207989031U (en) * | 2018-03-23 | 2018-10-19 | 北京交通大学 | The device that the shield tail of shield prototype is sealed |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107307A (en) * | 2019-05-23 | 2019-08-09 | 东北大学 | A kind of device and method of the Thrust System of Shield Tunneling Machines applied to compound stratum |
| CN113290901A (en) * | 2021-01-12 | 2021-08-24 | 优泰科(苏州)密封技术有限公司 | Shield seal forming method |
| CN113752443A (en) * | 2021-09-22 | 2021-12-07 | 中铁工程装备集团有限公司 | Shield tunneling machine hinged sealing piece field joint die and forming method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108397207B (en) | 2024-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108397207A (en) | The device that the shield tail of shield prototype is sealed | |
| CN105696598B (en) | A kind of application method for being adapted to mini-valve tube elevation angle grouting device | |
| CN207989031U (en) | The device that the shield tail of shield prototype is sealed | |
| CN102704905A (en) | Segmental hydraulic fracturing coal seam pressure releasing device and method | |
| CN202628024U (en) | Hyperpressure packer device | |
| CN108035730B (en) | Long-distance coal mine roadway pipe jacking tunneling method | |
| CN108457693A (en) | Fixed-point pressurizing and seepage-expanding method and structure for slotting grouting and sealing | |
| CN107420642A (en) | A kind of spheroidal graphite cast-iron push pipe relay well device | |
| CN104453860A (en) | Sealing detecting method and device of water injection well packer | |
| CN206562914U (en) | A kind of device for improving coal bed drilling hole wall slickness | |
| CN201092859Y (en) | Retransmission, deviation- rectifying hinge joint function synthesizing device for tunnel borer | |
| CN206987816U (en) | A kind of integrated form slurry pipe-jacking machine pushing tow system | |
| CN206647667U (en) | A kind of heavy caliber HDPE structural walls quickly connect inspection shaft | |
| CN203796210U (en) | Wellhead sealing device for communication | |
| CN104612625A (en) | Hole sealing device for low-permeability coal bed gas-phase fracturing drilling | |
| CN207701079U (en) | A kind of non-excavation-use high intensity time expansion device | |
| CN105525928A (en) | Construction method of sealing ring of duct piece wall of shield inclined shaft | |
| CN211573498U (en) | Hydraulic fracturing measuring device suitable for three-dimensional measuring equipment | |
| CN112922612A (en) | Shield tunneling machine starting tunnel portal sealing and water stopping device and construction method thereof | |
| CN202691346U (en) | Ultrahigh pressure test pressure steel tube device | |
| CN205779999U (en) | The clearance seal system of cylinder body and piston | |
| CN205483825U (en) | Interior water pressure that buries ground rigidity pipeline under pressure jointly adds lotus testing equipment with outer load | |
| CN103921916B (en) | A kind of shaft mechanical seal assembly for underwater propeller | |
| CN204627445U (en) | The shunting connector of double layer continuous oil pipe | |
| CN218669400U (en) | Crowded native device of rubber bag slip casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |