CN105782621A - Floating connection device for centre revolving joint of shield machine - Google Patents
Floating connection device for centre revolving joint of shield machine Download PDFInfo
- Publication number
- CN105782621A CN105782621A CN201610275361.6A CN201610275361A CN105782621A CN 105782621 A CN105782621 A CN 105782621A CN 201610275361 A CN201610275361 A CN 201610275361A CN 105782621 A CN105782621 A CN 105782621A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- transition piece
- revolving joint
- centre revolving
- shield machine
- 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
- 238000007667 floating Methods 0.000 title claims abstract description 25
- 230000007704 transition Effects 0.000 claims abstract description 45
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 238000012856 packing Methods 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 239000004519 grease Substances 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract 2
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
- F16L39/06—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies of the multiline swivel type, e.g. comprising a plurality of axially mounted modules
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/087—Joints with radial fluid passages
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (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)
- Excavating Of Shafts Or Tunnels (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention discloses a floating connection device for a centre revolving joint of a shield machine. The floating connection device comprises connecting flanges and transition pieces, wherein each connecting flange is connected with a cutter pipeline flange, and the transition pieces are connected with the centre revolving joint; a sleeve is connected between the connecting flanges and the transition pieces in a clamping manner; a gap is arranged between the sleeve and each connecting flange as well as between the sleeve and each transition piece to allow certain floating displacement; a hose is connected between the cutter pipeline flanges and the transition pieces; the hose is arranged in the sleeve; and a sealing system is arranged between each transition piece and a main drive box. According to the floating connection device disclosed by the invention, floating connection between each of cutters and the revolving joint is realized through the sleeve and the sealing systems; the gap is arranged between the sleeve and each connecting sleeve as well as between the sleeve and each transition piece to allow the certain floating displacement; when the cutters are not coaxial with a center of rotation of the centre revolving joint, compensation can be performed through the floating gaps to adapt to a working condition of non-concentric rotation, so that damage to components of the centre revolving joint is avoided, and the use reliability of the centre revolving joint is increased; and the whole device is more convenient to install and disassemble by half-buckled sleeve.
Description
Technical field
The present invention relates to the technical field of shield method tunnel construction equipment, be specifically related to a kind of shield machine centre revolving joint floating junction device.
Background technology
Along with the fast development of urban construction, improving constantly of especially mechanized construction degree, the shield machine as underground engineering and constructing tunnel field visual plant arises at the historic moment.Owing to each urban area geological conditions is different, improve in order to shield machine is excavated dregs, and block the water of excavation face when water rich strata is constructed, shield-tunneling construction process needs to be led to the additive such as foam, bentonite by centre revolving joint the face of cutterhead front end；Hydraulic oil and abrasion detection signal that cutter of backbreaking needs are also required to be incorporated into backbreak oil cylinder and the abrasion detection block that are positioned within cutterhead.
As it is shown in figure 1, centre revolving joint 6 is arranged on the center of shield machine, the rotor portion of centre revolving joint 6 is connected with cutterhead 10, and the stationary part of centre revolving joint 3 is fixed on main driving box 7.During shield machine work, the rotor portion of centre revolving joint 6 rotates with the rotation of cutterhead 10, and the stationary part of centre revolving joint 6 maintains static.Manufacturing operation according to shield machine, the processing and manufacturing respectively of cutterhead, centre revolving joint, it is assembled together after being each completed.Producing alignment error owing to adding man-hour in the different and installation process of benchmark, the center of rotation of cutterhead 10 and centre revolving joint 6 is it is difficult to ensure that coaxial.When center of rotation is not coaxial, centre revolving joint 6 adopts with cutterhead 10 and is rigidly connected, and the rotor of centre revolving joint 6 can be caused to rotate not smooth, even damage bearing and sealing device, affect the serviceability of the centre revolving joint 6 of shield machine.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of shield machine centre revolving joint floating junction device, the not coaxial rotating of cutterhead and centre revolving joint can be realized, solve the problem causing component damage that center of rotation does not coaxially make centre revolving joint in the cutterhead of shield machine and centre revolving joint processing, assembling process.
In order to achieve the above object, the technical scheme is that a kind of shield machine centre revolving joint floating junction device, including the adpting flange being connected with cutterhead pipeline flange and the transition piece being connected with centre revolving joint, equipped with sleeve between described adpting flange and transition piece, gap it is provided with between sleeve and adpting flange, being provided with gap between sleeve and transition piece, sleeve allows a certain amount of floating between adpting flange and transition piece；Being connected to flexible pipe between described cutterhead pipeline flange and transition piece, flexible pipe is arranged in sleeve, is provided with sealing system between transition piece and main driving box.
Further, described adpting flange and transition piece being equipped with boss, sleeve two ends are provided with the draw-in groove matched with boss, boss and draw-in groove card dress, it is achieved swivel coupling rotor rotates together with cutterhead.
Further, described sleeve is two half button-type sleeves matched.
Further, described adpting flange and transition piece and sleeve connection position are provided with groove, are provided with O RunddichtringO in groove, and O RunddichtringO is arranged between adpting flange, transition piece and sleeve.
Further, described sealing system includes seal joint, lip packing and grease collar, is provided with grease collar, is connected with seal joint outside lip packing between lip packing, and seal joint and main driving box are fixing to be connected, and the lip of lip packing is towards seal joint.
The present invention realizes the floating connection of cutterhead and swivel coupling by sleeve and sealing system, in the junction of sleeve with adpting flange, transition piece, gap is set, when cutterhead and the center of rotation of centre revolving joint are not coaxial, sleeve floating can be passed through compensate, thus adapting to the operating mode of not Concentric rotation, the components and parts avoiding centre revolving joint damage, and improve the reliability that centre revolving joint uses；Half button-type sleeve makes whole device installing/dismounting more convenient.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is present invention installation site in shield machine.
Fig. 2 is the structural representation of the present invention.
Fig. 3 is the structural representation of sealing system of the present invention.
Fig. 4 is the schematic cross-section of sleeve of the present invention.
Fig. 5 is the enlarged drawing of adpting flange of the present invention and sleeve connection.
Fig. 6 is the enlarged drawing that sleeve of the present invention is connected with transition piece.
Wherein, 1 is adpting flange, and 2 is O RunddichtringO, and 3 is sleeve, and 4 is transition piece, and 5 is sealing system, 5-1 is seal joint, and 5-2 is lip packing, and 5-3 is grease collar, swivel coupling centered by 6, and 7 is main driving box, 8 is flexible pipe, and 9 is cutterhead pipeline flange, and 10 is cutterhead, 11 boss, and 12 is draw-in groove.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not paying creative work premise, broadly fall into the scope of protection of the invention.
A kind of shield machine centre revolving joint floating junction device, as shown in Figure 2, including the adpting flange 1 being connected with cutterhead pipeline flange 9 and the transition piece 4 being connected with centre revolving joint 6, cutterhead pipeline flange 9 is connected with cutterhead 10, transition piece 4 is arranged on the rotor of centre revolving joint 6, by sleeve 3, adpting flange 9 is connected with transition piece 4, it is achieved swivel coupling 6 rotor rotates together with cutterhead.It is provided with O RunddichtringO 2 together between adpting flange 1 and sleeve 3, between transition piece 4 and sleeve 3, is provided with O RunddichtringO 2 together.It is provided with gap between sleeve 3 and adpting flange 1, between sleeve 3 and transition piece 4, is provided with gap.Sleeve 3 allows a certain amount of floating between adpting flange 9 and transition piece 4.Being connected to flexible pipe 8 between cutterhead pipeline flange 9 and transition piece 4, flexible pipe 8 is arranged in sleeve 3, it is achieved the conveying from middle swivel coupling 6 to cutterhead 10 of improvement medium.Being provided with sealing system 5 between transition piece 4 and main driving box 7, sealing system 5 is arranged on above and below transition piece 4, is used for preventing dregs from entering in transition piece 4.
As it is shown on figure 3, sealing system 5 includes seal joint 5-1, lip packing 5-2 and grease collar 5-3, being provided with grease collar 5-3 between lip packing 5-2, lip packing 5-2 is carried out spacing by grease collar 5-3.It is connected with seal joint 5-1 outside lip packing 5-2, seal joint 5-1 is fixing with main driving box 7 to be connected, the lip of lip packing 5-2 prevents the dregs of outside from entering in swivel coupling 6 towards seal joint 5-1, lip packing 5-2, thus swivel coupling 6 is damaged.
As shown in Figure 4, sleeve 3 is two half button-type sleeves matched.Sleeve 3 integral solder adopts line cutting to be divided into left and right two halves after completing, two and half tube structures linked together by bolt and pin pin when being installed, and facilitates the convenient connection with adpting flange 1, transition piece 4 of sleeve 3, facilitates the installation and removal of whole device simultaneously.
Preferably, adpting flange 1 and be equipped with boss 11 on transition piece 4, sleeve 3 two ends are provided with the draw-in groove 12 matched with boss 11, boss 11 and draw-in groove 12 card dress, it is achieved centre revolving joint 6 rotor and cutterhead synchronous axial system, as shown in Figure 5 and Figure 6.Adpting flange 9, transition piece 4 are provided with groove 13 with sleeve 3 connecting portion, are provided with O RunddichtringO 2 in groove 13.O RunddichtringO 2 is arranged between adpting flange 9, transition piece 4 and sleeve 3.The height of O RunddichtringO 2 highlights groove 13, there is certain gap between sleeve 3 and adpting flange 1, transition piece 4.When the center of rotation of cutterhead 10 and the center of rotation of centre revolving joint 6 are misaligned, a certain amount of floating is allowed to realize certain compensation between sleeve 3 and adpting flange 1, transition piece 4, bearing and the hermetic devices of avoiding not coaxial rotating centering swivel coupling 6 cause damage, improve the reliability that centre revolving joint 6 uses.O RunddichtringO 2 decrement changes along with the floating of sleeve 3, is always ensured that the sealing between sleeve 3 and adpting flange 1, transition piece 4, it is to avoid dregs and water enter the inside of sleeve 3.
The above; being only the present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; the change that can readily occur in or replacement, all should be encompassed within protection scope of the present invention.
Claims (5)
1. a shield machine centre revolving joint floating junction device, including the adpting flange (1) being connected with cutterhead pipeline flange (9) and the transition piece (4) being connected with centre revolving joint (6), it is characterized in that: between described adpting flange (1) and transition piece (4), be connected with sleeve (3), it is provided with gap between sleeve (3) and adpting flange (1), being provided with gap between sleeve (3) and transition piece (4), sleeve (3) has a certain amount of floating between adpting flange (1) and transition piece (4)；Being connected to flexible pipe (8) between described cutterhead pipeline flange (9) and transition piece (4), flexible pipe (8) is arranged in sleeve (3), is provided with sealing system (5) between transition piece (4) and main driving box (7).
2. shield machine centre revolving joint floating junction device according to claim 1, it is characterized in that, described adpting flange (1) and transition piece (4) are equipped with boss (11), sleeve (3) two ends are provided with the draw-in groove (12) matched with boss (11), boss (11) and draw-in groove (12) card dress, it is achieved swivel coupling rotor and cutterhead synchronous axial system.
3. shield machine centre revolving joint floating junction device according to claim 1 and 2, it is characterised in that described sleeve (3) is two half button-type sleeves matched.
4. shield machine centre revolving joint floating junction device according to claim 2, it is characterized in that, described adpting flange (1) and transition piece (4) are provided with groove (13) with sleeve (3) connecting portion, being provided with O RunddichtringO (2) in groove (13), O RunddichtringO (2) is arranged between adpting flange (1), transition piece (4) and sleeve (3).
5. shield machine centre revolving joint floating junction device according to claim 1, it is characterized in that, described sealing system (5) includes seal joint (5-1), lip packing (5-2) and grease collar (5-3), grease collar (5-3) it is provided with between lip packing (5-2), lip packing (5-2) outside is connected with seal joint (5-1), seal joint (5-1) and main driving box (7) are fixing to be connected, and the lip of lip packing (5-2) is towards seal joint (5-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610275361.6A CN105782621B (en) | 2016-04-29 | 2016-04-29 | A kind of shield machine centre revolving joint floating junction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610275361.6A CN105782621B (en) | 2016-04-29 | 2016-04-29 | A kind of shield machine centre revolving joint floating junction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105782621A true CN105782621A (en) | 2016-07-20 |
| CN105782621B CN105782621B (en) | 2017-10-27 |
Family
ID=56398916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610275361.6A Active CN105782621B (en) | 2016-04-29 | 2016-04-29 | A kind of shield machine centre revolving joint floating junction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105782621B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948830A (en) * | 2017-05-16 | 2017-07-14 | 郎溪腾旋科技有限公司 | A kind of native storehouse sealing device of novel shield machine |
| CN107152529A (en) * | 2017-06-14 | 2017-09-12 | 中铁工程装备集团有限公司 | The grease lubrication sealing system and injection monitoring method of push-bench drive system |
| CN107664243A (en) * | 2016-07-29 | 2018-02-06 | 上海力行工程技术发展有限公司 | A kind of shield machine center steering pipeline protection device |
| CN109681709A (en) * | 2018-12-14 | 2019-04-26 | 中船重型装备有限公司 | A kind of shield machine flexible conduit centre revolving joint |
| CN109681216A (en) * | 2018-12-14 | 2019-04-26 | 中船重型装备有限公司 | A kind of shield machine center steering formula flexible conduit attachment device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007146542A (en) * | 2005-11-29 | 2007-06-14 | Kidoh Construction Co Ltd | Connecting structure of excavating machine and method of in-water recovery of excavating machine |
| CN201575250U (en) * | 2009-12-11 | 2010-09-08 | 苏州有色金属研究院有限公司 | Novel swivel joint provided with soft floating ring sealing structure |
| CN104329556A (en) * | 2014-09-20 | 2015-02-04 | 辽宁三三工业有限公司 | Shield tunneling machine central turning joint |
| CN204611160U (en) * | 2015-04-30 | 2015-09-02 | 中铁工程装备集团有限公司 | Can be used for the centre revolving joint of multi-mode shield machine |
| CN204783027U (en) * | 2015-07-06 | 2015-11-18 | 中铁工程装备集团有限公司 | Balanced shield of muddy water constructs quick -witted centre revolving joint |
| CN205654354U (en) * | 2016-04-29 | 2016-10-19 | 中铁工程装备集团有限公司 | Shield constructs unsteady connecting device of quick -witted centre revolving joint |
-
2016
- 2016-04-29 CN CN201610275361.6A patent/CN105782621B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007146542A (en) * | 2005-11-29 | 2007-06-14 | Kidoh Construction Co Ltd | Connecting structure of excavating machine and method of in-water recovery of excavating machine |
| CN201575250U (en) * | 2009-12-11 | 2010-09-08 | 苏州有色金属研究院有限公司 | Novel swivel joint provided with soft floating ring sealing structure |
| CN104329556A (en) * | 2014-09-20 | 2015-02-04 | 辽宁三三工业有限公司 | Shield tunneling machine central turning joint |
| CN204611160U (en) * | 2015-04-30 | 2015-09-02 | 中铁工程装备集团有限公司 | Can be used for the centre revolving joint of multi-mode shield machine |
| CN204783027U (en) * | 2015-07-06 | 2015-11-18 | 中铁工程装备集团有限公司 | Balanced shield of muddy water constructs quick -witted centre revolving joint |
| CN205654354U (en) * | 2016-04-29 | 2016-10-19 | 中铁工程装备集团有限公司 | Shield constructs unsteady connecting device of quick -witted centre revolving joint |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664243A (en) * | 2016-07-29 | 2018-02-06 | 上海力行工程技术发展有限公司 | A kind of shield machine center steering pipeline protection device |
| CN106948830A (en) * | 2017-05-16 | 2017-07-14 | 郎溪腾旋科技有限公司 | A kind of native storehouse sealing device of novel shield machine |
| CN107152529A (en) * | 2017-06-14 | 2017-09-12 | 中铁工程装备集团有限公司 | The grease lubrication sealing system and injection monitoring method of push-bench drive system |
| CN109681709A (en) * | 2018-12-14 | 2019-04-26 | 中船重型装备有限公司 | A kind of shield machine flexible conduit centre revolving joint |
| CN109681216A (en) * | 2018-12-14 | 2019-04-26 | 中船重型装备有限公司 | A kind of shield machine center steering formula flexible conduit attachment device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105782621B (en) | 2017-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105782621A (en) | Floating connection device for centre revolving joint of shield machine | |
| CN205654354U (en) | Shield constructs unsteady connecting device of quick -witted centre revolving joint | |
| CN102661155B (en) | Shield machine synchronous grouting pipeline system and shield machine with same | |
| CN112879022B (en) | Tunneling method of tunneling equipment for tunnel communication channel by means of flexible sleeve system | |
| CN105736880A (en) | Novel multi-channel central rotary connector of shield tunneling machine | |
| CN100491694C (en) | Dismountable type shield cutter head drive unit inside machine and its dismounting and replacing method | |
| CN112746852A (en) | Tunneling equipment and method for tunnel communication channel by means of flexible sleeve initial receiving | |
| CN103147477B (en) | Cutting box of slot milling machine | |
| CN109441463A (en) | Shield machine is set with grouting stirring bearing package | |
| CN104265314B (en) | The multiple degrees of freedom switching device of advanced rig in shield excavation machine | |
| CN1202365C (en) | Central screw type soil pressure balance miniature push bench | |
| CN209483359U (en) | Novel cutterhead freezes static pipeline arranging structure | |
| CN205655015U (en) | Shield constructs novel many channel central swivel joint of machine | |
| CN102494136B (en) | Seal structure of main shaft of excavating equipment | |
| CN202832530U (en) | Heading machine and cutting portion thereof | |
| CN202580019U (en) | Main shaft sealing structure of heading device | |
| CN109538226B (en) | Novel cutter head freezing static pipeline arrangement structure | |
| CN204060696U (en) | Full face tunnel boring machine swivel joint and pipeline connecting box maintenance unit | |
| CN203463008U (en) | Power head structure for horizontal directional drilling machine | |
| CN202348285U (en) | Spindle driving device structure of tunneling device | |
| CN204717139U (en) | The pre-rectifying device of a kind of push pipe | |
| CN112267895A (en) | Pipe-jacking tunneling machine | |
| CN219262371U (en) | Novel transition section structure of central rotary joint of earth pressure balance shield machine | |
| CN219672637U (en) | Pipeline limiting device applied to shield tunneling machine cutterhead | |
| CN209698363U (en) | A kind of novel on-line maintenance rounding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |