CN106640115A - Double screw conveying device for shield tunneling machine - Google Patents
Double screw conveying device for shield tunneling machine Download PDFInfo
- Publication number
- CN106640115A CN106640115A CN201710134177.4A CN201710134177A CN106640115A CN 106640115 A CN106640115 A CN 106640115A CN 201710134177 A CN201710134177 A CN 201710134177A CN 106640115 A CN106640115 A CN 106640115A
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- 230000005641 tunneling Effects 0.000 title abstract description 5
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 21
- 230000006872 improvement Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 208000028659 discharge Diseases 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000008674 spewing Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 125000003003 spiro group Chemical group 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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/124—Helical conveying means therefor
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)
- Excavating Of Shafts Or Tunnels (AREA)
- Screw Conveyors (AREA)
Abstract
The invention discloses a double screw conveying device for a shield tunneling machine. The double screw conveying device for the shield tunneling machine comprises a first-stage screw conveying mechanism and a second-stage screw conveying mechanism. The first-stage screw conveying mechanism comprises a fixed drum, a telescopic drum, a first-stage screw rod and a first-stage screw rod driving mechanism; and the second-stage screw conveying mechanism comprises a sealing drum, a second-stage screw rod and a second-stage screw rod driving mechanism. According to the double screw conveying device for the shield tunneling machine, when the screw rod of the first-stage screw conveying mechanism needs to be retracted, the second-stage screw conveying mechanism stays still, retraction of the screw rod of the first-stage screw conveying mechanism can be achieved conveniently and quickly, meanwhile, the telescopic drum has the function of a gate when the screw rod is retracted, one gate can be omitted, and cost and installing space for the whole design of the screw conveying device are saved; and the screw rod of the second-stage screw conveying mechanism adopts a two-point supporting structure, the outer edges of screw blades are prevented from directly making contact with the inner wall of the drum, abrasion of the drum inner wall and the screw blades can be effectively prevented, the service life of the screw conveying device is greatly prolonged, and working stability of the screw conveying device is greatly improved.
Description
Technical field
The present invention relates to shield machine technical field, more particularly to a kind of shield machine Double helix conveyer device.
Background technology
Conveying worm is one of core apparatus of earth pressure balance shield machine, and its effect is mainly：1) by cutting mechanism
The dregs for cutting is transported on belt conveyor by helical blade, so as to ensure that it is certain that the dregs in native storehouse is maintained
Level；2) pressure in native storehouse is adjusted, by the conveying capacity for changing the rotating speed of conveying worm to adjust dregs, and then soil is adjusted
Pressure in storehouse, makes the pressure in native storehouse maintain certain poised state with soil pressure, so as to avoid being excavated in digging process
Face cave in and stratum sedimentation；3) spewing phenomenon is prevented, when excavating in the stratum of subsoil water rich content, can be by control
The opening and closing of conveying worm early gate and unearthed gate controlling the size of hydraulic pressure in conveying worm, so as to prevent to gush
Phenomenon.
When constructing in the stratum of subsoil water rich content, in order to realize the above-mentioned functions of conveying worm tool is devised
Have a double-stranded deuterostrophies conveyer, wherein primary spiral conveyor with just frequently with screw conveyer structure base
This is identical, and deuterostrophies conveying mechanism is then extra one section of increased conveying worm, wherein primary spiral conveyor
Soil outlet is connected with the charging aperture of deuterostrophies conveying mechanism, and deuterostrophies conveying mechanism dregs output is greater than one-level
Spiral conveying mechanism.At present, domestic is that German sea Rake company produces using more deuterostrophies conveying mechanism, the mechanism
Though the spewing phenomenon of subsoil water can be effectively prevented, following shortcoming is there is also：1) in shield machine tunneling process, due to double spiral shells
Rotation structure conveying worm volume is larger, needs the structure for installing fixation more, while deuterostrophies conveying mechanism and one-level spiral shell
The telescopable portion of rotation conveying mechanism is rigidly connected by bolt, once deuterostrophies conveying mechanism is fixed, then double-spiral structure
The Telescopic of conveying worm then cannot be realized, when deuterostrophies conveying mechanism is removable, need the supplementary structure being equipped with
Part is more, considerably increases the complexity of whole mechanism；2) screw rod of deuterostrophies conveying mechanism only leans on driving means one
Side is supported, as cantilever beam structure, and outfan then defines the phenomenon of helical blade and cylinder directly contact, when long
Between friction, abrasive action under, will there is heavy wear phenomenon in helical blade or cylinder, so as to shorten conveying worm
Service life, increased maintenance cost, while being also possible to affect original construction speed.
The content of the invention
In order to overcome drawbacks described above, the invention provides a kind of shield machine Double helix conveyer device, it is possible to achieve one
Deuterostrophies conveying mechanism remains stationary is motionless when the screw rod of level spiral conveying mechanism is flexible, while conveying worm can be reduced
Barrel wear, and improve the service life of conveying worm.
The technical scheme that adopted to solve its technical problem of the present invention is：A kind of shield machine is filled with Double helix conveying
Put, including primary spiral conveyor and deuterostrophies conveying mechanism, the primary spiral conveyor is inserted in including one end
Fixed cylinder in native storehouse, the flexible cylinder being movably set in the fixed cylinder other end, be placed in the fixed cylinder and
One-level screw rod in retracting cylinder body, and for driving the one-level screw drive of the one-level screw rod rotation, the one-level
Screw drive is fixed on the flexible cylinder；The fixed cylinder is provided with telescopic oil cylinder, the work of the telescopic oil cylinder
Stopper rod is connected to drive the retracting cylinder body phase to carry out stretching motion to the fixed cylinder with the flexible cylinder；The fixation
Cylinder is provided with one-level discharging opening, and the flexible cylinder is provided with perforate, and the perforate is in the retracting cylinder body phase to described solid
Can overlap with the one-level discharging opening during safety barrel body stretching motion and misplace to form bar gate type discharging opening；The deuterostrophies
Conveying mechanism includes sealed cylinder, two grades of screw rods being placed in the sealed cylinder and for driving two grades of screw rods to rotate
Two grades of screw drives, the two ends of the sealed cylinder and be respectively equipped with two grades of charging apertures on two relative sides
And secondary discharge port, the sealed cylinder is fixedly connected with the fixed cylinder, and the secondary discharge port goes out with the one-level
Material mouth is connected.
As a further improvement on the present invention, it is respectively equipped with left oil on two relative sides of the fixed cylinder other end
Cylinder ear mount, the left oil cylinder ear mount of the other end end correspondence fixed cylinder of the flexible cylinder is respectively equipped with right oil cylinder ear
Seat, the base of the telescopic oil cylinder is fixed in the left oil cylinder ear mount, and the piston rod of the telescopic oil cylinder is fixed on right oil cylinder
In ear mount.
As a further improvement on the present invention, the lateral surface of the fixed cylinder and flexible cylinder is provided with guiding and anti-torsion
Device.
As a further improvement on the present invention, the helical blade correspondence one-level discharging opening on the one-level screw rod is upper
Under the two-part hand of spiral it is contrary.
As a further improvement on the present invention, bearing block is provided with one end of the sealed cylinder, the bearing block is provided with
Spring bearing, two grades of screw drives are located on the other end of the sealed cylinder, two end-rack of two grades of screw rods
On the spring bearing and two grades of screw drives, the helical blade outer rim and the sealed cylinder of two grades of screw rods
There is gap between inwall.
As a further improvement on the present invention, two grades of screw rods are outside one end of the spring bearing and the sealing
Dust-proof seal ring is provided between cylinder.
As a further improvement on the present invention, cylinder sealing ring is provided between the fixed cylinder and flexible cylinder, it is described
The one-level discharging opening of fixed cylinder is externally provided with exit seal circle.
The invention has the beneficial effects as follows：The shield machine Double helix conveyer device hinge structure has advantages below：
1) when the screw rod in primary spiral conveyor needs to retract, deuterostrophies mechanism transfixion can be realized conveniently
The retraction of primary spiral conveyor screw rod, simultaneous retractable cylinder also has the function of gate in screw retract, can avoid
Additional one gate of discharge outlet of primary spiral conveyor, is that the global design of conveying worm saves cost and installation
Space；2) screw rod one end of deuterostrophies mechanism is supported using spring bearing, makes generally 2 supporting constructions of screw rod, is kept away
Exempt from the directly contact of helical blade outer rim and cylinder inboard wall, can effectively prevent the abrasion of cylinder inboard wall and helical blade, significantly
Improve the service life and job stability of conveying worm.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is A portions mplifying structure schematic diagram in Fig. 1；
Fig. 3 is B portions mplifying structure schematic diagram in Fig. 1.
With reference to accompanying drawing, make the following instructions：
11 --- fixed cylinders 12 --- stretch cylinder
13 --- one-level screw rod 14 --- one-level screw drives
15 --- telescopic oil cylinder 16 --- one-level discharging openings
17 --- cylinder sealing ring 18 --- exit seal circles
21 --- sealed cylinder 22 --- secondary discharge ports
23 --- two grades of screw rods 24 --- two grades of screw drives
25 --- two grades of charging apertures 26 --- bearing blocks
27 --- spring bearing 28 --- dust-proof seal rings
Specific embodiment
Below in conjunction with accompanying drawing, a preferred embodiment to the present invention elaborates.But protection scope of the present invention is not
Be limited to following embodiments, i.e., the simple equivalence changes made with scope of the present invention patent and description in every case with repair
Decorations, all still belong within patent covering scope of the present invention.
Refering to Fig. 1-3, a kind of shield machine Double helix conveyer device, including primary spiral conveyor and deuterostrophies it is defeated
Send mechanism, fixed cylinder 11 that the primary spiral conveyor is inserted in native storehouse including one end, be movably set in it is described solid
Flexible cylinder 12 in the safety barrel body other end, the one-level screw rod 13 being placed in the fixed cylinder and retracting cylinder body, and be used for
The one-level screw drive 14 of the one-level screw rod rotation, the one-level screw drive is driven to be fixed on the retracting cylinder
On body；The fixed cylinder is provided with telescopic oil cylinder 15, and the piston rod of the telescopic oil cylinder is connected with band with the flexible cylinder
Move the retracting cylinder body phase carries out stretching motion to the fixed cylinder；The fixed cylinder is provided with one-level discharging opening 16, institute
State flexible cylinder and be provided with perforate, the perforate can be with institute when the retracting cylinder body phase is to the fixed cylinder stretching motion
State one-level discharging opening to overlap and misplace to form bar gate type discharging opening；The deuterostrophies conveying mechanism include sealed cylinder 21,
Two grades of screw rods 23 being placed in the sealed cylinder and two grades of screw drives for driving two grades of screw rods rotation
24, the two ends of the sealed cylinder and it is respectively equipped with two grades of charging apertures 25 and secondary discharge port on two relative sides
22, the sealed cylinder is fixedly connected with the fixed cylinder, and the secondary discharge port is connected with the one-level discharging opening.
During work, one end of fixed cylinder is inserted in native storehouse, and one-level screw drive drives the rotation of one-level screw rod, will
The dregs that cutter cuts passes through one-level screw rod transmission to one-level discharging opening, subsequently into the close of deuterostrophies conveying mechanism
In sealed tube body, then two grades of screw rods are transported to into secondary discharge port.The drive mechanism of one-level screw rod is arranged on flexible cylinder, and two
The sealed cylinder of level spiral conveying mechanism is fixed on the fixed cylinder of primary spiral conveyor so that one-level screw rod needs contracting
Hui Shi, deuterostrophies mechanism transfixion can conveniently realize the retraction of one-level screw rod, while during one-level screw retract
Also there is the function of gate, i.e., due to being provided with perforate on flexible cylinder, the perforate, can in flexible cylinder stretching motion
Overlap or misplace with one-level discharging opening, so as to form bar gate type discharging opening, therefore can reduce by one spiral gate, reduction portion
Part, cost-effective and installing space.
Be respectively equipped with left oil cylinder ear mount on two relative sides of the fixed cylinder other end, the flexible cylinder it is another
The left oil cylinder ear mount of one end end correspondence fixed cylinder is respectively equipped with right oil cylinder ear mount, and the base of the telescopic oil cylinder is (logical
Cross bearing pin) it is fixed in the left oil cylinder ear mount, the piston rod (by bearing pin) of the telescopic oil cylinder is fixed on right oil cylinder ear mount
On.When the one-level screw rod of primary spiral conveyor needs to be retracted from native storehouse, only hydraulic oil need to be injected into telescopic oil cylinder
Cylinder rod is stretched out, otherwise can then make the one-level screw rod retracted enter storehouse of burying.
The lateral surface of the fixed cylinder and flexible cylinder is provided with guiding and anti-rotation lock, prevents screw machine in normal work
Driving means rotation and it play the guiding role during screw retract when making.
The upper and lower two-part hand of spiral of the helical blade correspondence one-level discharging opening on the one-level screw rod conversely,
Can effectively prevent dregs from pouring in spiro driving device direction, so as to cause dregs to be fixedly arranged in retracting cylinder body.
Bearing block 26 is provided with one end of the sealed cylinder, the bearing block is provided with spring bearing 27, two grades of spiral shells
On the other end of the sealed cylinder, the two ends of two grades of screw rods are set up in the spring bearing and two to bar drive mechanism
On level screw drive, there is gap between the helical blade outer rim and the sealed cylinder inwall of two grades of screw rods.
2 points of supports that support bearing and two grades of screw drives are formed to two grades of screw rods, i.e. bearings and driving are supported, in spiral
During machine normal work, blade outer rim and the sealed cylinder inwall of deuterostrophies conveying mechanism form gap, greatly reduce the two
Between contact friction, so as to improve the service life of conveying worm.
Two grades of screw rods are provided with dust-proof seal ring outside one end of the spring bearing and the sealed cylinder between
28, totally three, two seals chamber is formed, seal grease hole is offered in per pass sealing intracavity, it is close when screw machine normal work
Oil sealing fat is ceaselessly pumped into sealing intracavity, to prevent the impurity such as dregs, muddy water from leaking in spring bearing, and countershaft manufacturing
Into damage, so as to ensure device busy during stability and service life.
Cylinder sealing ring 17 is provided between the fixed cylinder and flexible cylinder, outside the one-level discharging opening of the fixed cylinder
Exit seal circle 18 is provided with, cylinder sealing ring there are four, forms three seals chamber, and in three seals intracavity seal grease is provided with
Hole, when screw machine normal work, seal grease is ceaselessly delivered to sealing intracavity by pump, to prevent dregs, muddy water, air etc.
Go out leakage from the gap of flexible cylinder and fixed cylinder, so as to keep the pressure balance in native storehouse；Exit seal chamber is close for annular
Seal, is placed in one-level discharge outlet, and when one-level screw retract, the part of non-perforate then forms gate on flexible cylinder,
Ensure the sealing property of gate in the presence of exit seal circle.
Claims (7)
1. a kind of shield machine Double helix conveyer device, including primary spiral conveyor and deuterostrophies conveying mechanism, it is special
Levy and be：Fixed cylinder (11) that the primary spiral conveyor is inserted in native storehouse including one end, be movably set in it is described
Flexible cylinder (12) in the fixed cylinder other end, the one-level screw rod (13) being placed in the fixed cylinder and retracting cylinder body, with
And for driving the one-level screw drive (14) of the one-level screw rod rotation, the one-level screw drive to be fixed on institute
State on flexible cylinder；The fixed cylinder is provided with telescopic oil cylinder (15), the piston rod of the telescopic oil cylinder and the retracting cylinder
Body connects to drive the retracting cylinder body phase to carry out stretching motion to the fixed cylinder；The fixed cylinder is provided with one-level and goes out
Material mouth (16), the flexible cylinder is provided with perforate, and the perforate is in the retracting cylinder body phase to the flexible fortune of the fixed cylinder
Can overlap with the one-level discharging opening when dynamic and misplace to form bar gate type discharging opening；The deuterostrophies conveying mechanism includes
Sealed cylinder (21), two grades of screw rods (23) being placed in the sealed cylinder and for driving two grades of screw rods rotation two
Level screw drive (24), the two ends of the sealed cylinder and is respectively equipped with two grades of charging apertures on two relative sides
(25) and secondary discharge port (22), the sealed cylinder is fixedly connected with the fixed cylinder, and the secondary discharge port and institute
State the connection of one-level discharging opening.
2. shield machine according to claim 1 Double helix conveyer device, it is characterised in that：The fixed cylinder other end
Left oil cylinder ear mount is respectively equipped with two relative sides, the other end end correspondence fixed cylinder of the flexible cylinder
Left oil cylinder ear mount is respectively equipped with right oil cylinder ear mount, and the base of the telescopic oil cylinder is fixed in the left oil cylinder ear mount, described to stretch
The piston rod of contracting oil cylinder is fixed in right oil cylinder ear mount.
3. shield machine according to claim 1 Double helix conveyer device, it is characterised in that：The fixed cylinder and flexible
The lateral surface of cylinder is provided with guiding and anti-rotation lock.
4. shield machine according to claim 1 Double helix conveyer device, it is characterised in that：Spiral shell on the one-level screw rod
The upper and lower two-part hand of spiral of the vane piece correspondence one-level discharging opening is contrary.
5. shield machine according to claim 1 Double helix conveyer device, it is characterised in that：One end of the sealed cylinder
Bearing block (26) is inside provided with, the bearing block is provided with spring bearing (27), and two grades of screw drives are located at the sealing
On the other end of cylinder, the two ends of two grades of screw rods are set up on the spring bearing and two grades of screw drives, described
There is gap between the helical blade outer rim of two grades of screw rods and the sealed cylinder inwall.
6. shield machine according to claim 5 Double helix conveyer device, it is characterised in that：Two grades of screw rods are near institute
State outside one end of spring bearing and dust-proof seal ring (28) is provided with and the sealed cylinder between.
7. shield machine according to claim 1 Double helix conveyer device, it is characterised in that：The fixed cylinder and flexible
Cylinder sealing ring (17) is provided between cylinder, the one-level discharging opening of the fixed cylinder is externally provided with exit seal circle (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710134177.4A CN106640115A (en) | 2017-03-08 | 2017-03-08 | Double screw conveying device for shield tunneling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710134177.4A CN106640115A (en) | 2017-03-08 | 2017-03-08 | Double screw conveying device for shield tunneling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106640115A true CN106640115A (en) | 2017-05-10 |
Family
ID=58847099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710134177.4A Pending CN106640115A (en) | 2017-03-08 | 2017-03-08 | Double screw conveying device for shield tunneling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106640115A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566221A (en) * | 2019-09-26 | 2019-12-13 | 中铁工程装备集团有限公司 | Tandem type double-screw conveyor conveying device and conveying method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456304A (en) * | 1981-06-15 | 1984-06-26 | Hitachi Shipbuilding & Engineering Co., Ltd. | Shield tunneling machine and earth removing apparatus therefor |
| JPH11256985A (en) * | 1998-03-12 | 1999-09-21 | Kawasaki Heavy Ind Ltd | Excavating machine |
| CN101798933A (en) * | 2010-04-13 | 2010-08-11 | 同济大学 | Simulation test system for soil pressure balance shielding screw conveyer |
| CN204783040U (en) * | 2015-07-06 | 2015-11-18 | 中铁工程装备集团有限公司 | Prevent twin screw conveyor that gushs |
| CN105350978A (en) * | 2015-10-26 | 2016-02-24 | 武汉船用机械有限责任公司 | Spiral conveyer |
| 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 |
| CN205977222U (en) * | 2016-06-03 | 2017-02-22 | 广东华隧建设股份有限公司 | Double mode shield constructs quick -witted structure |
| CN206681748U (en) * | 2017-03-08 | 2017-11-28 | 江苏凯宫隧道机械有限公司 | Shield machine double helix conveying device |
-
2017
- 2017-03-08 CN CN201710134177.4A patent/CN106640115A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456304A (en) * | 1981-06-15 | 1984-06-26 | Hitachi Shipbuilding & Engineering Co., Ltd. | Shield tunneling machine and earth removing apparatus therefor |
| JPH11256985A (en) * | 1998-03-12 | 1999-09-21 | Kawasaki Heavy Ind Ltd | Excavating machine |
| CN101798933A (en) * | 2010-04-13 | 2010-08-11 | 同济大学 | Simulation test system for soil pressure balance shielding screw conveyer |
| CN204783040U (en) * | 2015-07-06 | 2015-11-18 | 中铁工程装备集团有限公司 | Prevent twin screw conveyor that gushs |
| CN105350978A (en) * | 2015-10-26 | 2016-02-24 | 武汉船用机械有限责任公司 | Spiral conveyer |
| CN205977222U (en) * | 2016-06-03 | 2017-02-22 | 广东华隧建设股份有限公司 | Double mode shield constructs quick -witted structure |
| 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 |
| CN206681748U (en) * | 2017-03-08 | 2017-11-28 | 江苏凯宫隧道机械有限公司 | Shield machine double helix conveying device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566221A (en) * | 2019-09-26 | 2019-12-13 | 中铁工程装备集团有限公司 | Tandem type double-screw conveyor conveying device and conveying method thereof |
| CN110566221B (en) * | 2019-09-26 | 2021-09-24 | 中铁工程装备集团有限公司 | Tandem type double-screw conveyor conveying device and conveying method thereof |
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| PB01 | Publication | ||
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Application publication date: 20170510 |