CN110331754A - Drag head construction simulation experimental rig - Google Patents
Drag head construction simulation experimental rig Download PDFInfo
- Publication number
- CN110331754A CN110331754A CN201910555931.0A CN201910555931A CN110331754A CN 110331754 A CN110331754 A CN 110331754A CN 201910555931 A CN201910555931 A CN 201910555931A CN 110331754 A CN110331754 A CN 110331754A
- Authority
- CN
- China
- Prior art keywords
- drag head
- movable guard
- test
- water tank
- simulation experimental
- 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.)
- Pending
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/8808—Stationary installations, e.g. installations using spuds or other stationary supports
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9206—Digging devices using blowing effect only, like jets or propellers
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9293—Component parts of suction heads, e.g. edges, strainers for preventing the entry of stones or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F7/00—Equipment for conveying or separating excavated material
- E02F7/10—Pipelines for conveying excavated materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention discloses a kind of drag head construction simulation experimental rigs, including test drag head, mud sump, guide rail, the rack for being responsible for support drag head, driving plate, sludge pipe, high pressure water pipe, dredge pump, high-pressure flush pump, lifting hawser.Drag head construction simulation experimental rig of the present invention, belong to Dredging Technology field, it can be used to study the various operating conditions that drag head occurs in the construction process: can adjust drag head angle over the ground, movable guard angle over the ground, grid angle, the arrangement mode of movable guard high-pressure flush nozzle, rake teeth quantity, drag head forward speed, it dredges depth, mud flow rate, concentration of hydraulic mixture etc., it is intended to simulate the energy consumption that rake under different operating conditions inhales ship construction, study the conveying characteristic that drag head excavates characteristic and mud, realize dynamic parameter monitoring, improve dredging efficiency, reduce dredging work cost, guidance is provided for practice of construction.
Description
Technical field
The invention belongs to Dredging Technology field more particularly to a kind of drag head construction simulation experimental rigs.
Background technique
Drag suction dredger is a kind of dredger of ship dredging construction, and the drag head and hydraulic dredging device of equipment can be by rivers
Bed or the substances such as silt, gravel in seabed are excavated, are transported in spoil hopper, and drag head is put into underwater certain depth, make drag head and underwater
The dredging working face of soil layer is in contact, and drag head is communicated by rake arms with the intracorporal spoil hopper of ship, and rake arms angle can oscilaltion adjustment.
After the required depth of dredging that drag head is transferred to, rake teeth contact soil is excavated, while dredge pump is aspirated, and is passed through
Hydraulic action is transported to the dredging mixture to get up is excavated in spoil hopper through rake arms.Drag head operation at present has the following problems: (1)
Dredging operation relative poor, the experience that many dredge operation parameters rely on crewman are set, and lead to ship energy utilization not to the utmost
Rationally；(2) it excavates clay and is easy stifled rake, cleaning drag head influences construction efficiency；(3) hard of dredged area lower layer regional area is encountered
When native, sliding rake phenomenon causes effectively be excavated at this；(4) setting of high-pressure flush distribution pipeline is unreasonable.
Nowadays opposite to the systematic Study test platform of drag head mining process, slurry transportation and stifled rake mechanism to lack.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of drag head construction simulation experimental rigs, can dig to drag head
The systematic Study test platform of pick process, slurry transportation and stifled rake mechanism, it is intended to simulate rake under different operating conditions and inhale ship construction
Energy consumption, research drag head excavate the conveying characteristic of characteristic and mud, realize dynamic parameter monitoring, improve dredging efficiency, reduce dredging
Engineering cost provides guidance for practice of construction.
The technical solution adopted by the present invention to solve the technical problems is: a kind of drag head construction simulation experimental rig is provided,
Including with moving guide rail mud sump, test drag head, can along the test-bed that moving guide rail moves, can be moved along test-bed guide rail
Dynamic driving plate, mud line, dredge pump, high-pressure flush pump；Mud line, which sends back to mud in mud sump, to be recycled, and drag head packet is tested
Fixed body and movable guard are included, fixed body is connected by a hinge with movable guard, and high pressure water is transported to test drag head by high-pressure flush pump
In water tank and movable guard in water tank.
According to the above technical scheme, driving plate is connected with test-bed by wheel and can laterally be moved along test-bed guide rail
Dynamic, driving plate includes driving motor, pipeline support, lifting hawser and hawser motor, and driving motor and hawser motor pass through fixation
Bolt is mounted in driving plate, and pipeline support is fixed in driving plate.
According to the above technical scheme, it tests under drag head fixed body and reinforces equipped with several dismountable anti-skidding blades and several blades
Plate.
According to the above technical scheme, have between test-bed and mud sump moving guide rail, driving plate and test-bed guide rail locking
The idler wheel of crash structure is used to support stand and is moved.Test-bed is connected with mud sump moving guide rail by wheel and can be along mud
Pond carries out longitudinal movement, itself can be used as guide rail.
According to the above technical scheme, test drag head fixed body includes having an area of pipe, outlet(discharge) flange, the high-pressure flush shunting with butterfly valve
Pipeline, wear-resistant block water tank, movable guard hydraulic stem, wear-resistant block, wear-resistant block water tank are communicated with wear-resistant block nozzle, test the outlet of drag head
Flange is connected with mud line and high-pressure flush pipeline, and circumference Guan Shangyou hinge is connected with lifting hawser, and test drag head goes out
Mouth is equipped with pressure gauge, and for movable guard hydraulic stem for controlling fixed body and movable guard relative motion, high-pressure flush pump is defeated by high pressure water
The water tank being sent in wear-resistant block water tank and movable guard.
According to the above technical scheme, anti-skidding blade and blade stiffening plate are welded below wear-resistant block water tank.
According to the above technical scheme, movable guard includes movable guard water tank, movable guard tank inlet pipe, several rake teeths, adjustable angle
Grid, the grid reinforcing rib of degree, movable guard hydraulic stem rocker bar bearing are welded on movable guard top and are connected with movable guard hydraulic stem
The angular adjustment of responsible movable guard is connect, grid is connect with movable cover body by grid hinge, and rake teeth is welded on movable guard water tank
On side plate towards ground, grid reinforcing rib is welded between grid and movable guard, and grid and movable cover body are cut with scissors by grid
Chain link.
According to the above technical scheme, the high-pressure flush distribution pipeline with butterfly valve be a bifurcated pipe, all the way by steel pipe with it is wear-resisting
Block water tank communicates, which is provided with butterfly valve and flowmeter, is communicated all the way by hose with movable guard water tank.
According to the above technical scheme, movable guard waterbox design is left and right perforation.When side hose knots when can prevent from constructing, one
Half nozzle can not supply water.
According to the above technical scheme, mud line and high-pressure flush pipeline are respectively equipped with a flowmeter.
The beneficial effect comprise that: 1. can provide drag head construction simulation test platform, and it is horizontal to support that drag head carries out
To, longitudinal comprehensive movement, drag head travel speed can adjust by power device, to drag head mining process, slurry transportation and stifled rake
Mechanism carries out systematic data acquisition；
2. pressure gauge is equipped in dredge pump, high-pressure flush pump inlet and outlet, drag head outlet, tube outlet, for measuring each point
Pressure and along journey pressure drop, high-pressure flush pipeline, high-pressure flush lead to the bypass of wear-resistant block water tank, mud line is respectively provided with a flow
Meter, for measuring the size of the road flow；
3. the angle over the ground of drag head can be adjusted by lifting hawser, movable guard angle over the ground can be adjusted by hydraulic stem, it is right
Ground angle and movable guard angular compliance can adjust excavating depth；
4. the angle over the ground of adjustable grid can adjust movable guard water tank high-pressure flush nozzle by replacement water tank panel
Arrangement mode and injector spacing can adjust high-pressure flush pump pressure and flow, can adjust the pressure and flow of dredge pump, and comparison is different
Excavation performance and slurry transportation characteristic under operating condition；
5. arranging nozzle under movable guard high-pressure flush to be aligned with rake teeth gap, clay is prevented to be bonded on rake teeth；
It, can be with to adapt to different digging working condition demands 6. the high pressure water pipe road for leading to wear-resistant block water tank is equipped with butterfly valve
Closing when not needing wear-resistant block high-pressure flush, while promoting the hitting power of movable guard water tank high-pressure flush；
7. drag head fixed body bottom is equipped with several dismountable anti-skidding blades, anti-on-slip is harrowed phenomenon, is added equipped with several blades
Strong plate, prevents blade from deforming；
8. adjustable rake teeth quantity when different soil properties is excavated in simulation, stifled rake phenomenon is prevented；
9. movable guard waterbox design is left and right perforation, when side hose knots when can prevent from constructing, the nozzle of half can not
The case where water supply, occurs.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structural schematic diagram of drag head construction simulation experimental rig of the embodiment of the present invention；
The structural schematic diagram of test-bed in Fig. 2 embodiment of the present invention；
The structural schematic diagram of driving plate in Fig. 3 embodiment of the present invention；
The structural schematic diagram of drag head in Fig. 4 embodiment of the present invention；
Movable guard high-pressure flush injector configuration and finger positions relation schematic diagram in Fig. 5 embodiment of the present invention；
Anti-skidding blade and its structural schematic diagram of stiffening plate in Fig. 6 embodiment of the present invention；
The structural schematic diagram of water tank intermediate plate in Fig. 7 embodiment of the present invention；
The structural schematic diagram of Fig. 8 mesohigh of embodiment of the present invention bath distribution pipeline.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
In the embodiment of the present invention, as Figure 1-Figure 2, a kind of drag head construction simulation experimental rig, including mud sump 1 are provided,
Mud sump guide rail 2, test-bed 3 test drag head 4, and driving plate 5 goes up and down hawser 6, hose elbow 7, high-pressure flush pipeline bellows piece
8, mud line bellows piece 9, high-pressure flush pump 10, dredge pump 11, bend pipe bracket 12, test-bed guide rail 13, driving plate limit
Point 2 14, testing stand truss 15 have band locked between test-bed 3 and mud sump guide rail 2, driving plate 5 and test-bed guide rail 13
The idler wheel of mechanism is used to support stand and is moved, and goes up and down the hawser rocker bar bearing on the hawser and drag head fixed body in hawser 6
41 are connected, and the telescopic segment and lengths of steel pipes, pump and pipeline of high-pressure flush pipeline and spoil disposal, drag head and pipeline pass through flanged joint, curved
On sludge pipe tilting section and can be free to slide, the other end is connected by a hinge to be driven an end cap of the pipe carrier 12 with circle
On the bend pipe bracket hinge of plate 5, driving plate limit point 14 is welded on test-bed guide rail 13.
As shown in figure 3, its driving plate includes: driving motor 16, hawser motor 17, pipeline support 18, bend pipe bracket hinge
19, driving motor 16 is mounted on corresponding position in driving plate 5 by fixing bolt with hawser motor 17, and pipeline support 18 is welded on
Corresponding position in driving plate 5, bend pipe bracket rocker bar bearing 19 are welded on appropriate location on pipeline support 18, and with bend pipe bracket 12
Together by hinge assemblies.
As shown in Figure 4-Figure 7, the test drag head of drag head construction simulation experimental rig includes: fixed body 20, movable guard 21, rake
Head outlet(discharge) flange 22, high-pressure flush flange 23, drag head delivery gauge 24, high-pressure flush distribution pipeline 25, butterfly valve 26 supply water soft
Pipe 27, movable guard regulation hydraulic stem 28, movable guard water tank 29, movable guard nozzle 30, grid 31, the wear-resistant block 32 with nozzle are prevented
Sliding blade 33, blade stiffening plate 34, wear-resistant block water tank 35, wearability water tank flowmeter 36, rake teeth 37, movable guard water tank intermediate plate
38, hawser rocker bar bearing 41, grid hinge 42, movable guard regulation hydraulic stem 28 is responsible for fixed body 20 and movable guard 21 is transported relatively
Dynamic, the length for adjusting movable guard regulation hydraulic stem 28 can change the angle over the ground of movable guard 21, grid 31 and movable guard 21
It is connected by grid hinge 42, anti-skidding blade 33 and blade stiffening plate 34 are welded on 35 lower section of wear-resistant block water tank, hawser hinge branch
Seat 41 is welded on corresponding position on fixed body 20.As shown in figure 8, drag head construction simulation experimental rig high-pressure flush distribution pipeline packet
It includes: high-pressure flush flange 23, butterfly valve 26, wear-resistant block water tank flowmeter 36, movable guard water tank pipeline 39, wearability water tank pipeline
40, butterfly valve 26 and wear-resistant block water tank pipeline 40 pass through flanged joint.
When being tested, required dredging soil property and topography and geomorphology are arranged in mud sump 1 first, and is filled the water to appropriate deep
Test-bed 3 is then moved to suitable position along mud sump guide rail 2 by degree, and starting hawser motor 17 is transferred to drag head 4 is tested
Required depth is to adjust the angle over the ground of drag head, and adjustment movable guard regulation hydraulic stem 28 is by the angular turn over the ground of movable guard
To appropriate location, butterfly valve 26 is opened, high pressure water is transported to wear-resistant block water tank 35 and movable guard water tank by starting high-pressure flush pump 10
29, high pressure water is sprayed from the movable guard nozzle 30 on movable guard water tank 19 all the way, and another way high pressure water is from wear-resistant block water tank 35
Nozzle on wear-resistant block 32 is sprayed to impact ground and carry out precrushing, and starting dredge pump 11 is aspirated, and starts driving plate 5 simultaneously
On driving motor 16, move driving plate along test-bed guide rail 13, moving process mesohigh flushing pipe ripple
Pipeline section 8 and mud line bellows piece 9 compress therewith, and the mud of suction returns to mud sump 1 after mud line circulation；Test process
In, control system acquires dredge pump, high-pressure flush pumps inlet and outlet pressure, drag head outlet pressure, mud line and high-pressure flush pipeline
Flow, wear-resistant block water tank flow；After Mining Test, high-pressure flush pump 10 and dredge pump 11 out of service, lifting hawser 17 will
Drag head is promoted to more than 1 liquid level of mud sump, and driving plate 5 moves backward, and test drag head 4 is sent back to initial position, in moving process
High-pressure flush pipeline bellows piece 8 and mud line bellows piece 9 stretch therewith, then clear up on drag head the soil that bonds and miscellaneous
Object then proceeds with lower battery of tests or stops test.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of drag head construction simulation experimental rig, which is characterized in that including with moving guide rail mud sump, test drag head, can
The test-bed that is moved along moving guide rail, can be along driving plate that test-bed guide rail moves, mud line, dredge pump, high-pressure flush
Pump；Mud line, which sends back to mud in mud sump, to be recycled, and test drag head includes fixed body and movable guard, and fixed body and movable guard are logical
Hinge connection is crossed, high pressure water is transported to the water tank in the water tank and movable guard in test drag head by high-pressure flush pump.
2. drag head construction simulation experimental rig according to claim 1, which is characterized in that driving plate passes through wheel and test
Rack is connected and can include driving motor, pipeline support, lifting hawser and cable along test-bed guide rail transverse shifting, driving plate
Rope motor, driving motor and hawser motor are mounted in driving plate, and pipeline support is fixed in driving plate.
3. drag head construction simulation experimental rig according to claim 1 or 2, which is characterized in that under test drag head fixed body
Equipped with several dismountable anti-skidding blades and several blade stiffening plates.
4. drag head construction simulation experimental rig according to claim 1 or 2, which is characterized in that test-bed and mud sump move
It is dynamic to there is the idler wheel with locking mechanism to be moved between guide rail, driving plate and test-bed guide rail for support stand.
5. drag head construction simulation experimental rig according to claim 1 or 2, which is characterized in that test drag head fixed body packet
Circumference pipe, outlet(discharge) flange, the high-pressure flush distribution pipeline with butterfly valve, wear-resistant block water tank, movable guard hydraulic stem, wear-resistant block are included, it is resistance to
Abrading block water tank is communicated with wear-resistant block nozzle, and the outlet(discharge) flange for testing drag head is connected with mud line and high-pressure flush pipeline, side
There is hinge to be connected on round tube with lifting hawser, the outlet of test drag head is equipped with pressure gauge, and movable guard hydraulic stem is for controlling fixation
Body and movable guard relative motion, high-pressure flush pump the water tank being transported to high pressure water in wear-resistant block water tank and movable guard.
6. drag head construction simulation experimental rig according to claim 5, which is characterized in that anti-skidding blade and blade stiffening plate
It is welded below wear-resistant block water tank.
7. drag head construction simulation experimental rig according to claim 1 or 2, which is characterized in that movable guard includes movable guard
Water tank, movable guard tank inlet pipe, several rake teeths, the grid of angle adjustable, grid reinforcing rib, movable guard hydraulic stem rocker bar bearing
It is welded on movable guard top and the angular adjustment for the responsible movable guard that is connected with movable guard hydraulic stem, grid and movable cover body are logical
The connection of grid hinge is crossed, rake teeth is welded on movable guard water tank towards on the side plate on ground, and grid reinforcing rib is welded on grid and work
Between dynamic cover, grid is connect with movable cover body by grid hinge.
8. drag head construction simulation experimental rig according to claim 5, which is characterized in that the high-pressure flush with butterfly valve shunts
Pipeline is a bifurcated pipe, is communicated all the way by steel pipe with wear-resistant block water tank, which is provided with butterfly valve and flowmeter, all the way by soft
Pipe is communicated with movable guard water tank.
9. drag head construction simulation experimental rig according to claim 7, which is characterized in that movable guard waterbox design is left and right
Perforation.
10. drag head construction simulation experimental rig according to claim 1 or 2, which is characterized in that mud line and high pressure punching
Water lines are respectively equipped with a flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910555931.0A CN110331754A (en) | 2019-06-25 | 2019-06-25 | Drag head construction simulation experimental rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910555931.0A CN110331754A (en) | 2019-06-25 | 2019-06-25 | Drag head construction simulation experimental rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110331754A true CN110331754A (en) | 2019-10-15 |
Family
ID=68140418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910555931.0A Pending CN110331754A (en) | 2019-06-25 | 2019-06-25 | Drag head construction simulation experimental rig |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964881A (en) * | 2020-07-09 | 2020-11-20 | 武汉理工大学 | Reamer construction simulation experiment device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130075342A1 (en) * | 2003-09-03 | 2013-03-28 | Environmental Lunch Box Technology Llc | Environmental remediation system |
| CN205827731U (en) * | 2016-04-06 | 2016-12-21 | 河海大学 | A kind of simulation waterway dredging device for education experiment |
| CN108914876A (en) * | 2018-09-18 | 2018-11-30 | 山东大学 | A kind of dredging plant experimental rig |
| CN109208675A (en) * | 2018-09-11 | 2019-01-15 | 中交广州航道局有限公司 | Dredger and its drag head structure |
| CN109238649A (en) * | 2018-10-29 | 2019-01-18 | 中船第九设计研究院工程有限公司 | A kind of dredger simulation experiment method based on rake suction unit vehicle special mechanism |
-
2019
- 2019-06-25 CN CN201910555931.0A patent/CN110331754A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130075342A1 (en) * | 2003-09-03 | 2013-03-28 | Environmental Lunch Box Technology Llc | Environmental remediation system |
| CN205827731U (en) * | 2016-04-06 | 2016-12-21 | 河海大学 | A kind of simulation waterway dredging device for education experiment |
| CN109208675A (en) * | 2018-09-11 | 2019-01-15 | 中交广州航道局有限公司 | Dredger and its drag head structure |
| CN108914876A (en) * | 2018-09-18 | 2018-11-30 | 山东大学 | A kind of dredging plant experimental rig |
| CN109238649A (en) * | 2018-10-29 | 2019-01-18 | 中船第九设计研究院工程有限公司 | A kind of dredger simulation experiment method based on rake suction unit vehicle special mechanism |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964881A (en) * | 2020-07-09 | 2020-11-20 | 武汉理工大学 | Reamer construction simulation experiment device |
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Application publication date: 20191015 |
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