CN206205893U - Helix transporting device and the development machine with it - Google Patents
Helix transporting device and the development machine with it Download PDFInfo
- Publication number
- CN206205893U CN206205893U CN201620999013.9U CN201620999013U CN206205893U CN 206205893 U CN206205893 U CN 206205893U CN 201620999013 U CN201620999013 U CN 201620999013U CN 206205893 U CN206205893 U CN 206205893U
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- conveying worm
- telescopic
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Abstract
The utility model discloses a kind of helix transporting device and the development machine with it.Helix transporting device, including：First conveying worm, first conveying worm includes transportation section, telescopic section and telescopic oil cylinder, transportation section is located at the front side of telescopic section, telescopic section is provided with drive device, drive device is connected with the conveying axis of transportation section, and telescopic oil cylinder is connected between transportation section and telescopic section to drive telescopic section to be moved relative to transportation section；Second conveying worm, the second conveying worm is connected by ball bearing with transportation section.According to helix transporting device of the present utility model, first conveying worm is divided into transportation section and telescopic section, and promote telescopic section and the conveying axis of transportation section to move backward using telescopic oil cylinder, it is possible thereby to make conveying axis that there is Telescopic, and then the probability gushed in maintenance process can be reduced, such that it is able to lift the security performance of helix transporting device.
Description
Technical field
The utility model is related to set of tunneling construction equipment technical field, specifically, more particularly to a kind of helical feed
Device and the development machine with it.
Background technology
Development machine is widely applied city underground tunnel due to its security, economy and efficient construction characteristic
In the excavation in hole.In development machine design, single step helical conveyer is generally used, however, on Extra-fine sand, medium coarse sand stratum
Or groundwater level it is higher when, development machine is during driving it may happen that spewing phenomenon, now, high-pressure slurry can pass through
Conveying worm is ejected from its soil outlet, pollution driving owner cabin, the substantial amounts of pressure for being likely to result in and excavating in cabin of gushing
Reduce, so as to cause surface subsidence.Additionally, needing maintenance when the helical axis of conveying worm produces cracking or the phenomenon of fracture
When, then need that the helical axis of conveying worm is retracted and removed.During dismounting, the dregs or muddy water in cabin are excavated
The inner chamber of conveying worm will be rapidly poured in by dividing plate, it may occur however that the phenomenon of water burst, so as to the main cabin to development machine is caused
Severe contamination.
It is to solve spewing phenomenon, sediment improvement, pressurize pump can be taken, be equipped with and anti-measure, but the actual tunneling process such as gushed
Middle situation when gushing is more unexpected, quickly grows, and pressure of gushing is larger, thus how more thoroughly, efficiently solve anti-gushing
Retraction helical axis problem is still a problem to be solved for constructing tunnel when problem and screw machine are repaired.
In correlation technique, single step helical conveyer only possesses and keeps excavating lock pressure by conveying the dregs under cutterhead excavation
The function of dynamic balance, for it is anti-gush need to by take sediment improvement, pressurize pump, be equipped with it is anti-the measure such as gush, but effect is still
It is not ideal enough；DWG, due to self structure limitation, it is impossible to realize free Telescopic, it is impossible to effectively solve blowout prevention
Gush problem.
Utility model content
The utility model is intended at least solve to a certain extent one of technical problem in correlation technique.Therefore, this reality
With a kind of helix transporting device of new proposition, have the advantages that simple structure, performance are good.
The utility model also provides a kind of development machine, and the digging implement has helix transporting device as described above.
According to the helix transporting device of the utility model embodiment, including：First conveying worm, first spiral transferring
Sending machine includes transportation section, telescopic section and telescopic oil cylinder, and the transportation section is located at the front side of the telescopic section, is set in the telescopic section
There is drive device, the drive device is connected with the conveying axis of the transportation section, and the telescopic oil cylinder is connected to the transportation section
Driving the telescopic section to be moved relative to the transportation section and the telescopic section between；Second conveying worm, described second
Conveying worm is connected by ball bearing with the transportation section.
According to the helix transporting device of the utility model embodiment, the first conveying worm is divided into transportation section and is stretched
Section, and promote telescopic section and the conveying axis of transportation section to move backward using telescopic oil cylinder, it is possible thereby to it is flexible to have conveying axis
Function, and then the probability gushed in maintenance process can be reduced, such that it is able to lift the security of helix transporting device
Energy.
According to one embodiment of the present utility model, first conveying worm is provided with the first slag notch and for beating
Open or close the first cleanout door for closing first slag notch；Second conveying worm is provided with the second slag notch and for beating
Open or close the second cleanout door for closing second slag notch.
According to one embodiment of the present utility model, second cleanout door is flip-shell cleanout door.
According to the development machine of the utility model embodiment, including：Anterior shield；Middle shield, after the middle shield is located at the anterior shield
Side；It is supporting afterwards, the rear supporting rear side positioned at the middle shield；With helix transporting device as described above, the helical feed
The transportation section of machine is connected with the anterior shield, the middle shield respectively, second conveying worm and the rear supporting connection.
According to the development machine of the utility model embodiment, the first conveying worm is divided into transportation section and telescopic section, and
Telescopic section and the conveying axis of transportation section are promoted to move backward using telescopic oil cylinder, it is possible thereby to make conveying axis that there is Telescopic,
And then the probability gushed in maintenance process can be reduced, such that it is able to lift the security performance of helix transporting device.
According to one embodiment of the present utility model, the front end of the transportation section is provided with flange, the flange with it is described before
Shield is connected.
According to one embodiment of the present utility model, development machine also include fixation kit, one end of the fixation kit with
The middle part connection of the transportation section, the other end of the fixation kit is connected with the middle shield.
According to one embodiment of the present utility model, development machine also include rod assembly, one end of the rod assembly with
The second conveying worm connection, the other end and the rear supporting connection.
According to one embodiment of the present utility model, the rod assembly includes：Ear mount, the ear mount is located at described second
On the cylinder of conveying worm；And pull bar, one end of the pull bar is connected with the ear mount, the other end and the rear supporting company
Connect.
According to one embodiment of the present utility model, the pull bar is two groups, and pull bar described in two groups is located at second spiral shell
Revolve the both sides of conveyer.
According to one embodiment of the present utility model, many root pull bars are included in pull bar described in every group.
Brief description of the drawings
Fig. 1 is the structural representation of the helix transporting device according to the utility model embodiment.
Fig. 2 is the partial structural diagram of the helix transporting device according to the utility model embodiment.
Fig. 3 is the structural representation of the development machine according to the utility model embodiment.
Reference：
Helix transporting device 100,
First conveying worm 110, transportation section 111, flange 112, conveying axis 117, telescopic section 113, drive device 118,
Telescopic oil cylinder 114, the first slag notch 115, the first cleanout door 116,
Second conveying worm 120, the second slag notch 121, the second cleanout door 122, cylinder 123,
Ball bearing 130,
Development machine 200,
Anterior shield 210, middle shield 220, rear supporting 230,
Fixation kit 240,
Rod assembly 250, ear mount 251, pull bar 252, sub- pull bar 253.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings.Below by
The embodiment being described with reference to the drawings is exemplary, it is intended to for explaining the utility model, and it is not intended that new to this practicality
The limitation of type.
In description of the present utility model, it is to be understood that term "front", "rear", "left", "right", " vertical ", " water
It is flat ", " top ", " bottom ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship,
It is for only for ease of description the utility model and simplifies description, must has rather than the device or element for indicating or imply meaning
Specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In description of the present utility model, " multiple " is meant that at least two, such as two
It is individual, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be
Mechanically connect, or electrically connect or can communicate each other；Can be joined directly together, it is also possible to by the indirect phase of intermediary
Even, can be two element internals connection or two interaction relationships of element, unless otherwise clearly restriction.For this
For the those of ordinary skill in field, concrete meaning of the above-mentioned term in the utility model can be as the case may be understood.
The helix transporting device 100 and development machine according to the utility model embodiment are described in detail referring to Fig. 1-Fig. 3
200。
As shown in Figure 1-Figure 3, the helix transporting device 100 according to the utility model embodiment, including：First helical feed
The conveying worm 120 of machine 110 and second.
Specifically, the first conveying worm 110 includes transportation section 111, telescopic section 113 and telescopic oil cylinder 114.Transportation section
111 front sides (front side as shown in Figure 1, Figure 3) for being located at telescopic section 113, telescopic section 113 is provided with drive device 118, drives dress
Put 118 to be connected with the conveying axis 117 of transportation section 111, telescopic oil cylinder 114 is connected between transportation section 111 and telescopic section 113 to drive
Dynamic telescopic section 113 is moved relative to transportation section 111.Second conveying worm 120 is connected by ball bearing 130 with transportation section 111.
As shown in figure 3, telescopic oil cylinder 114 can drive telescopic section 113 to move in the longitudinal direction, when telescopic oil cylinder 11 drives telescopic section
113 when being moved rearwards by, and drive device 118 can be moved into place at b；When telescopic oil cylinder 114 drives telescopic section 113 to move forward
When, drive device 118 can be moved into place at a.
It should be noted that when helix transporting device 100 needs maintenance, need to be by the conveying of the first conveying worm 110
Axle 117 is moved rearwards by a certain distance, can now start telescopic oil cylinder 114, and using the motive force of telescopic oil cylinder 114, promotion is stretched
Contracting section 113 is moved backward, and simultaneous retractable section 113 can drive conveying axis 117 to move backward.Because the second conveying worm 120 leads to
Ball bearing 130 is crossed to be connected with transportation section 111, when telescopic section 113 is moved backward, the conveying axis on the first conveying worm 110
117 move backward, and the miscellaneous part on the first conveying worm 110 is static with the second conveying worm 120.Thus, in maintenance
When, promote telescopic section 113, conveying axis 117 to move backward using telescopic oil cylinder 114, you can the flexible of conveying axis to be realized, so that can
The probability gushed in maintenance process is effectively reduced, such that it is able to lift the security performance of helix transporting device 100.
Helix transporting device 100 according to the utility model embodiment, transportation section is divided into by the first conveying worm 110
111 and telescopic section 113, and promote telescopic section 113 and the conveying axis 117 of transportation section 111 to move backward using telescopic oil cylinder 114,
It is possible thereby to make conveying axis 117 that there is Telescopic, and then the probability gushed in maintenance process can be reduced, so that can
To lift the security performance of helix transporting device 100.
As shown in Figure 1, Figure 3, according to one embodiment of the present utility model, the first conveying worm 110 is provided with first
Slag notch 115 and the first cleanout door 116 for opening or closing the first slag notch 115.Second conveying worm 120 is provided with
Second slag notch 121 and the second cleanout door 122 for opening or closing the second slag notch 121.Thus, can have and facilitate spiral transferring
Device 100 is sent to discharge slag charge.It is save space, improves space availability ratio, the second cleanout door 122 is flip-shell cleanout door.
Shown in Fig. 1-Fig. 3, the development machine 200 according to the utility model embodiment, including anterior shield 210, middle shield 220, match somebody with somebody afterwards
Set 230 and helix transporting device as described above 100.
Specifically, middle shield 220 is located at the rear side of anterior shield 210, and rear supporting 230 are located at the rear side of middle shield 220, helical feed
The transportation section 111 of device 100 is connected with anterior shield 210, middle shield 220 respectively, and the second conveying worm 120 is connected with rear supporting 230.
It should be noted that when helix transporting device 100 needs maintenance, need to be by the conveying axis 117 of the first conveying worm 110 backward
Mobile a certain distance, can now start telescopic oil cylinder 114, using the motive force of telescopic oil cylinder 114, promote telescopic section 113 to
After move, simultaneous retractable section 113 can drive conveying axis 117 to move backward.Due to the first conveying worm 110 respectively with anterior shield
210th, middle shield 220 is connected, the second conveying worm 120 is connected with rear supporting 230, the second conveying worm 120 passes through ball bearing
130 are connected with transportation section 111, and when telescopic section 113 is moved backward, the conveying axis 117 on the first conveying worm 110 are transported backward
Dynamic, the miscellaneous part on development machine 200 is static.Thus, in maintenance, telescopic section 113, conveying are promoted using telescopic oil cylinder 114
Axle 117 is moved backward, you can realize the flexible of conveying axis, so as to gushed in maintenance process general can be effectively reduced
Rate, such that it is able to lift the security performance of helix transporting device 100.
Development machine 200 according to the utility model embodiment, the He of transportation section 111 is divided into by the first conveying worm 110
Telescopic section 113, and promote telescopic section 113 and the conveying axis 117 of transportation section 111 to move backward using telescopic oil cylinder 114, thus may be used
So that conveying axis 117 have Telescopic, and then the probability gushed in maintenance process can be reduced, such that it is able to be lifted
The security performance of helix transporting device 100.
As Figure 1-Figure 2, according to one embodiment of the present utility model, the front end of transportation section 111 is provided with flange 112,
Flange 112 is connected with anterior shield 210.Thus, it is possible to improve reliability that the first conveying worm 110 is connected with anterior shield 210 and steady
It is qualitative.It is connected with middle shield 220 for convenience of the first helix transporting device 100, in example as Figure 1-Figure 2, development machine 200
Also include fixation kit 240, one end of fixation kit 240 is connected with the middle part of transportation section 111, the other end of fixation kit 240
It is connected with middle shield 220.
As shown in Figure 1-Figure 3, according to one embodiment of the present utility model, development machine 200 also includes rod assembly 250.
Wherein, one end of rod assembly 250 is connected with the second conveying worm 120, and the other end is connected with rear supporting 230.Thus, it is easy to
Second conveying worm 120 is connected with rear supporting 230.Further, as shown in figure 3, rod assembly 250 includes ear mount 251
With pull bar 252.Wherein, ear mount 251 is located on the cylinder 123 of the second conveying worm 120.One end of pull bar 252 and ear mount 251
Connection, the other end is connected with rear supporting 230.It should be noted that pull bar 252 there can be certain pendulum angle, thus may be used
To buffer the vibration that development machine 200 is produced in the course of the work, such that it is able to extend the service life of development machine 200.
As shown in figure 3, in some embodiments of the present utility model, pull bar 252 can be two groups, two groups of 252, pull bars
In the both sides of the second conveying worm 120.It is possible thereby to lift the uniform force of the second conveying worm 120.Further,
Include many root pull bars 253 in every group of pull bar 252.Thus, it is possible to effectively buffer what development machine 200 was produced in the course of the work
Vibration, such that it is able to extend the service life of development machine 200.
The development machine 200 according to the utility model embodiment is described in detail referring to Fig. 1-Fig. 3.It is worth understanding,
It is described below to be merely illustrative, rather than to concrete restriction of the present utility model.
As shown in Figure 1-Figure 3, development machine 200 includes：Anterior shield 210, middle shield 220, rear supporting 230, fixation kit 240, drawing
Bar assembly 250 and helix transporting device 100.
Wherein, middle shield 220 is located at the rear side of anterior shield 210, and rear supporting 230 are located at the rear side of middle shield 220.Transportation section 111
Front end is provided with flange 112, and flange 112 is connected with anterior shield 210.Thus, it is possible to improve the first conveying worm 110 and anterior shield 210
The reliability and stability of connection.
First conveying worm 110 includes transportation section 111, telescopic section 113 and telescopic oil cylinder 114.Transportation section 111 is located at stretches
The front side (front side as shown in Figure 1, Figure 3) of contracting section 113, telescopic section 113 is provided with drive device 118, drive device 118 with it is defeated
The conveying axis 117 of section 111 are sent to connect, telescopic oil cylinder 114 is connected between transportation section 111 and telescopic section 113 to drive telescopic section
113 move relative to transportation section 111.
First conveying worm 110 is provided with the first slag notch 115 and for opening or closing the first slag notch 115
One cleanout door 116.Second conveying worm 120 is provided with the second slag notch 121 and for opening or closing the second slag notch 121
The second cleanout door 122, the second slag notch 121 can be used for by and small particle sandstone.Thus, can have and facilitate helical feed
Device 100 discharges slag charge.Second conveying worm 120 is connected by ball bearing 130 with transportation section 111, thus can realize
Rotation between one conveying worm 110 and the second conveying worm 120.Ball bearing 130 can be arranged on first by bolt
Between the conveying worm 120 of conveying worm 110 and second.It is save space, shortens the overall length of helix transporting device 100, the
Two cleanout doors 122 are flip-shell cleanout door.For convenience of pressure release, the bottom of the second conveying worm 120 is provided with pressure relief opening, in pressure release
Mouth goes out to be provided with pressure relief ball valve, and when gushing, can open pressure relief ball valve carries out pressure release.For convenience of maintenance, the first spiral transferring
Send and maintenance door can be set on the conveying worm 120 of machine 110 and second.
As shown in figure 1, one end of fixation kit 240 is connected with the middle part of transportation section 111, the other end of fixation kit 240
It is connected with middle shield 220.
As shown in Figure 1-Figure 3, one end of rod assembly 250 is connected with the second conveying worm 120, and the other end is supporting with rear
230 connections.Thus, it is easy to be connected the second conveying worm 120 with rear supporting 230.As shown in Fig. 2 rod assembly 250 includes
Ear mount 251 and pull bar 252.Wherein, ear mount 251 is located on the cylinder 123 of the second conveying worm 120.Pull bar 252 can be two
Group, two groups of pull bars 252 are located at the both sides of the second conveying worm 120.It is possible thereby to lift the stress of the second conveying worm 120
Uniformity.Further, two root pull bars 253 are included in every group of pull bar 252.One end of sub- pull bar 253 is connected with ear mount 251,
The other end is connected with rear supporting 230.It should be noted that pull bar 252 can have certain pendulum angle, it is possible thereby to buffer
The vibration that development machine 200 is produced in the course of the work, such that it is able to extend the service life of development machine 200.
It should be noted that when helix transporting device 100 needs maintenance, need to be by the conveying of the first conveying worm 110
Axle 117 is moved rearwards by a certain distance, can now start telescopic oil cylinder 114, and using the motive force of telescopic oil cylinder 114, promotion is stretched
Contracting section 113 is moved backward, and simultaneous retractable section 113 can drive conveying axis 117 to move backward.Due to 110 points of the first conveying worm
It is not connected with anterior shield 210, middle shield 220, the second conveying worm 120 is connected with rear supporting 230, the second conveying worm 120 leads to
Ball bearing 130 is crossed to be connected with transportation section 111, when telescopic section 113 is moved backward, the conveying axis on the first conveying worm 110
117 move backward, and the miscellaneous part on development machine 200 is static.Thus, in maintenance, telescopic section is promoted using telescopic oil cylinder 114
113rd, conveying axis 117 are moved backward, you can the flexible of conveying axis is realized, so as to can be effectively reduced be sprayed in maintenance process
The probability for gushing, such that it is able to lift the security performance of helix transporting device 100.
Thus, two-stage speed governing can be realized by the first conveying worm 110 and the second conveying worm 120, on the one hand
Not only facilitate control to slag tap speed, on the other hand can also effectively control pressure release speed.Meanwhile, by the first conveying worm 110
It is divided into transportation section 111 and telescopic section 113, and the conveying axis of telescopic section 113 and transportation section 111 is promoted using telescopic oil cylinder 114
117 move backward, it is possible thereby to make conveying axis 117 have Telescopic, and then can reduce and are gushed in maintenance process
Probability, such that it is able to lift the security performance of helix transporting device 100.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be with
Combined in an appropriate manner in any one or more embodiments or example.Additionally, in the case of not conflicting, this area
Technical staff the feature of the different embodiments or example described in this specification and different embodiment or example can be entered
Row is combined and combined.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in scope of the present utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (10)
1. a kind of helix transporting device, it is characterised in that including：
First conveying worm, first conveying worm includes transportation section, telescopic section and telescopic oil cylinder, the conveying section
In the front side of the telescopic section, the telescopic section is provided with drive device, the conveying axis of the drive device and the transportation section
Connection, the telescopic oil cylinder is connected between the transportation section and the telescopic section to drive the telescopic section defeated relative to described
Section is sent to move；
Second conveying worm, second conveying worm is connected by ball bearing with the transportation section.
2. helix transporting device according to claim 1, it is characterised in that first conveying worm is provided with first
Slag notch and the first cleanout door for opening or closing first slag notch；
Second conveying worm is provided with the second slag notch and goes out for opening or closing the second of second slag notch
Slag door.
3. helix transporting device according to claim 2, it is characterised in that second cleanout door is slagged tap for flip-shell
Door.
4. a kind of development machine, it is characterised in that including：
Anterior shield；
Middle shield, the middle shield is located at the rear side of the anterior shield；
It is supporting afterwards, the rear supporting rear side positioned at the middle shield；With
Helix transporting device according to any one of claim 1-3, the transportation section difference of the conveying worm
It is connected with the anterior shield, the middle shield, second conveying worm and the rear supporting connection.
5. development machine according to claim 4, it is characterised in that the front end of the transportation section is provided with flange, the flange
It is connected with the anterior shield.
6. development machine according to claim 4, it is characterised in that also including fixation kit, one end of the fixation kit
Middle part with the transportation section is connected, and the other end of the fixation kit is connected with the middle shield.
7. development machine according to claim 4, it is characterised in that also including rod assembly, one end of the rod assembly
It is connected with second conveying worm, the other end and the rear supporting connection.
8. development machine according to claim 7, it is characterised in that the rod assembly includes：
Ear mount, the ear mount is located on the cylinder of second conveying worm；And
Pull bar, one end of the pull bar is connected with the ear mount, the other end and the rear supporting connection.
9. development machine according to claim 8, it is characterised in that the pull bar is two groups, and pull bar described in two groups is located at institute
State the both sides of the second conveying worm.
10. development machine according to claim 9, it is characterised in that include many root pull bars in pull bar described in every group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620999013.9U CN206205893U (en) | 2016-08-30 | 2016-08-30 | Helix transporting device and the development machine with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620999013.9U CN206205893U (en) | 2016-08-30 | 2016-08-30 | Helix transporting device and the development machine with it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206205893U true CN206205893U (en) | 2017-05-31 |
Family
ID=58759398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620999013.9U Expired - Fee Related CN206205893U (en) | 2016-08-30 | 2016-08-30 | Helix transporting device and the development machine with it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206205893U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223974A (en) * | 2016-08-30 | 2016-12-14 | 中国铁建重工集团有限公司 | Helix transporting device and there is its development machine |
| CN112796772A (en) * | 2021-02-05 | 2021-05-14 | 中建三局集团有限公司 | Method for transforming conventional shield into tunneling, splicing and synchronous construction shield |
-
2016
- 2016-08-30 CN CN201620999013.9U patent/CN206205893U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223974A (en) * | 2016-08-30 | 2016-12-14 | 中国铁建重工集团有限公司 | Helix transporting device and there is its development machine |
| CN106223974B (en) * | 2016-08-30 | 2019-03-12 | 中国铁建重工集团有限公司 | Helix transporting device and development machine with it |
| CN112796772A (en) * | 2021-02-05 | 2021-05-14 | 中建三局集团有限公司 | Method for transforming conventional shield into tunneling, splicing and synchronous construction shield |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20190830 |