CN108286438A - A kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device and monitoring method - Google Patents
A kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device and monitoring method Download PDFInfo
- Publication number
- CN108286438A CN108286438A CN201810101130.2A CN201810101130A CN108286438A CN 108286438 A CN108286438 A CN 108286438A CN 201810101130 A CN201810101130 A CN 201810101130A CN 108286438 A CN108286438 A CN 108286438A
- Authority
- CN
- China
- Prior art keywords
- hobboing cutter
- cylinder
- normal pressure
- tool changing
- bolt
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/093—Control of the driving shield, e.g. of the hydraulic advancing cylinders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The present invention proposes a kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device and monitoring method, the geological information of shield machine excavation face can be inferred according to the stress of hobboing cutter, so as to adjust shield machine boring parameter, the overload and high vibration of hobboing cutter are on the one hand avoided in this way, make being extended with the service life for hobboing cutter, on the other hand, shield driving efficiency is also improved, construction cost is reduced;Including cylinder, the left end of cylinder inboard wall is provided with tool apron, hobboing cutter is provided in tool apron, the right end of cylinder inboard wall is provided with end cap, and the outside of cylinder is disposed with welding base and normal pressure tool changing device from left to right, and welding base and normal pressure tool changing device are removable connected, the flange in the bottom of normal pressure tool changing device and cylinder is bolted, for bolt by conducting wire connection signal conditioning module, Signal-regulated kinase connects PLC, and PLC connections monitor computer.
Description
Technical field
The present invention relates to the monitoring of equipment technical fields in shield excavation machine industry, particularly relate to a kind of normal pressure tool changing cutterhead
Hobboing cutter stress real-time monitoring device and monitoring method.
Background technology
Normal pressure tool changing cutterhead can realize normal pressure tool changing, the safe efficient feature of tool changing in high-water-pressure stratum shield-tunneling construction
Keep the application of normal pressure tool changing cutterhead increasingly extensive.Be disposed on normal pressure tool changing cutterhead it is tens of hobboing cutter, due to nothing in shield-tunneling construction
Method obtains the abundant geological information on construction stratum, and shield machine boring parameter cannot be adjusted in time, cause hobboing cutter load excessive
And high vibration.Hobboing cutter load excessive can cause the damage of its structural member, the high vibration of hobboing cutter that hobboing cutter connector can be made to loosen,
Accelerate part fatigue, causes hobboing cutter oil leak.
Invention content
A kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device of present invention proposition and monitoring method, can be according to hobboing cutter
Stress infers on the one hand the geological information of shield machine excavation face avoids hobboing cutter in this way so as to adjust shield machine boring parameter
Overload and high vibration, make being extended with the service life for hobboing cutter, on the other hand, also improve shield driving efficiency, reduce and be constructed into
This.
The technical proposal of the invention is realized in this way:
A kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device, including cylinder, the left end of cylinder inboard wall are provided with knife
, it is provided with hobboing cutter in tool apron, the right end of cylinder inboard wall is provided with end cap, and the outside of cylinder is disposed with welding from left to right
Seat and normal pressure tool changing device, welding base and normal pressure tool changing device are removable connected, and the flange in the bottom of normal pressure tool changing device and cylinder is logical
It crosses and is bolted, for bolt by conducting wire connection signal conditioning module, Signal-regulated kinase connects PLC, and PLC connections monitoring calculates
Machine.
The bolt has been uniformly arranged 24 along the flange in the bottom of cylinder, and bolt is placed equidistant with including 4 and is internally provided with
The dynamometry bolt of conducting wire, dynamometry bolt pass through conducting wire connection signal conditioning module.
It is welded on cutter head panel on the outside of the welding base, the left end of welding base is pierced by cutter head panel.
The tool apron and hobboing cutter are bolted.
A kind of monitoring method of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device, includes the following steps:
(1), it sets when hobboing cutter is crushed ground by the pressure along cylinder axial direction as F1, setting cylinder is in high-water-pressure stratum
The water pressure being subject to is F2, F2The pressure P that can be measured by the effective compression area S and hydraulic pressure sensor of cylinder is obtained, specially F2
=PS sets frictional force that cylinder is subject to as F3, cylinder body bottom flange is set by the holding power of bolt as F4;
(2), the power that i-th (i=1,2,3,4) dynamometry bolt of setting measures is Fai, by the pulling force of normal pressure tool changing device
For Fbi, Fai=Fbi, initial pretightening force Fci, residual pre-tightening forces Fei, working pulling force Fdi, set the rigidity of dynamometry bolt as
Cb, the rigidity of knife drum flange is Cm;
(3), go out the axially loaded F of hobboing cutter according to the stress balance derivation of equation of dynamometry bolt1Variation.
F can be obtained according to knife cylinder axially loaded balance in the step (1)3+F4=F1+F2, take the average operation of 24 bolts
Pulling force is the working pulling force of 4 dynamometry bolts, can be obtained
It can be obtained according to the stress balance of dynamometry bolt in the step (2)Fei+Fdi=Fai,
It can thus be concluded that That is F1Value follow survey
The power F that power bolt measuresaiVariation and change.
The present invention obtains the soft or hard distribution of the entire excavation face ground of cutterhead by the stress of monitoring normal pressure tool changing cutterhead hobboing cutter
Situation provides more fully geological information for Shield Construction Method Used, for make shield driving parameter make in time adjustment provide according to
According to improve shield driving efficiency;The present invention can reduce the consumption of hobboing cutter in shield-tunneling construction, reduce number of changing knife, carrying
Construction cost is also reduced while high shield driving efficiency.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of the present invention;
Fig. 2 is distribution schematic diagram of the bolt on cylinder body bottom flange;
Fig. 3 is stress diagram of the dynamometry bolt on cylinder;
Fig. 4 is the stress diagram of cylinder when high-water-pressure stratum hobboing cutter and ground contact;
Fig. 5 is the signal transmission flow schematic diagram of hobboing cutter load-bearing monitor device.
In figure:1- cylinders, 102- hobboing cutters, 103- tool aprons, 104- end caps, 2- welding bases, 3- cutter head panels, 4- normal pressure tool changing
Device, 5- dynamometry bolts.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of not making the creative labor
Embodiment shall fall within the protection scope of the present invention.
As shown in Fig. 1-5, an embodiment of the present invention provides a kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device,
Including cylinder 1, the left end of 1 inner wall of cylinder is provided with tool apron 103, and hobboing cutter 102, the right end of 1 inner wall of cylinder are provided in tool apron 103
It is provided with end cap 104, the outside of cylinder 1 is disposed with welding base 2 and normal pressure tool changing device 4 from left to right, welding base 2 and often
Press tool changing device 4 is removable to be connected, the flange in the bottom of normal pressure tool changing device 4 and cylinder 1 is bolted, and bolt is connected by conducting wire
Signal-regulated kinase is connect, Signal-regulated kinase connects PLC, and PLC connections monitor computer.
The bolt has been uniformly arranged 24 along the flange in the bottom of cylinder, and bolt is placed equidistant with including 4 and is internally provided with
The dynamometry bolt 5 of conducting wire, dynamometry bolt 5 pass through conducting wire connection signal conditioning module.
The outside of the welding base 2 is welded on cutter head panel 3, and the left end of welding base 2 is pierced by cutter head panel 3.
The tool apron 103 and hobboing cutter 102 are bolted.
A kind of monitoring method of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device, includes the following steps:
(1), it sets when hobboing cutter is crushed ground by the pressure along 1 axial direction of cylinder as F1, setting cylinder 1 is in high-water-pressure stratum
In the water pressure that is subject to be F2, F2The pressure P that can be measured by the effective compression area S and hydraulic pressure sensor of cylinder 1 is obtained, specifically
For F2=PS sets frictional force that cylinder 1 is subject to as F3, 1 flange in the bottom of cylinder is set by the holding power of bolt as F4;
(2), the power that i-th (i=1,2,3,4) dynamometry bolt of setting measures is Fai, by the pulling force of normal pressure tool changing device
For Fbi, Fai=Fbi, initial pretightening force Fci, residual pre-tightening forces Fei, working pulling force Fdi, the rigid of dynamometry bolt is set
Degree is Cb, the rigidity of knife drum flange is Cm;
(3), go out the axially loaded F of hobboing cutter according to the stress balance derivation of equation of dynamometry bolt1Variation.
F3+F can be obtained according to knife cylinder axially loaded balance in the step (1)4=F1+F2, take the average operation of 24 bolts
Pulling force is the working pulling force of 4 dynamometry bolts, can be obtained
It can be obtained according to the stress balance of dynamometry bolt in the step (2)Fei+Fdi=Fai,
It can thus be concluded that
Wherein Fci can be not applied to extraneous load according to knife cylinder
When hobboing cutter load-bearing monitor device display data obtain,For definite value, F3 is much smaller than F1+F2, from there through the dynamometry spiral shell
The power F that bolt measuresaiVariation can judge the axially loaded F of the hobboing cutter1Variation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (7)
1. a kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device, including cylinder (1), it is characterised in that:Cylinder (1) inner wall
Left end be provided with tool apron (103), is provided with hobboing cutter (102) in tool apron (103), the right end of cylinder (1) inner wall is provided with end cap
(104), the outside of cylinder (1) is disposed with welding base (2) and normal pressure tool changing device (4) from left to right, welding base (2) and often
Press tool changing device (4) is removable to be connected, the flange in the bottom of normal pressure tool changing device (4) and cylinder (1) is bolted, and bolt passes through
Conducting wire connection signal conditioning module, Signal-regulated kinase connect PLC, and PLC connections monitor computer.
2. a kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device according to claim 1, it is characterised in that:It is described
Bolt has been uniformly arranged 24 along the flange in the bottom of cylinder, and bolt includes 4 and is placed equidistant with the dynamometry spiral shell for being internally provided with conducting wire
Bolt (5), dynamometry bolt (5) pass through conducting wire connection signal conditioning module.
3. a kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device according to claim 1, it is characterised in that:It is described
It is welded on the outside of welding base (2) on cutter head panel (3), one end of welding base (2) is pierced by cutter head panel (3).
4. a kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device according to claim 1, it is characterised in that:It is described
Tool apron (103) and hobboing cutter (102) are bolted.
5. a kind of monitoring method of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device, which is characterized in that include the following steps:
(1), it sets when hobboing cutter is crushed ground by the pressure along cylinder (1) axial direction as F1, setting cylinder (1) is in high-water-pressure stratum
In the water pressure that is subject to be F2, F2The pressure P that can be measured by the effective compression area S and hydraulic pressure sensor of cylinder (1) is obtained, tool
Body is F2=PS sets frictional force that cylinder (1) is subject to as F3, set cylinder (1) flange in the bottom by bolt holding power as
F4;
(2), the power that i-th (i=1,2,3,4) dynamometry bolt of setting measures is Fai, the pulling force by normal pressure tool changing device is Fbi,
Fai=Fbi, initial pretightening force Fci, residual pre-tightening forces Fei, working pulling force Fdi, the rigidity of dynamometry bolt is set as Cb, knife
The rigidity of drum flange is Cm;
(3), go out the axially loaded F of hobboing cutter according to the stress balance derivation of equation of dynamometry bolt1Variation.
6. a kind of monitoring method of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device according to claim 5, special
Sign is:F can be obtained according to knife cylinder axially loaded balance in the step (1)3+F4=F1+F2, take the average operation of 24 bolts
Pulling force is the working pulling force of 4 dynamometry bolts, can be obtained
7. a kind of monitoring method of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device according to claim 5 or 6,
It is characterized in that:It can be obtained according to the stress balance of dynamometry bolt in the step (2)
Fei+Fdi=Fbi, it can thus be concluded that
That is F1Value follow the power F that dynamometry bolt measuresaiVariation and
Variation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810101130.2A CN108286438B (en) | 2018-02-01 | 2018-02-01 | Device and method for monitoring stress of hob of normal-pressure tool changing cutterhead in real time |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810101130.2A CN108286438B (en) | 2018-02-01 | 2018-02-01 | Device and method for monitoring stress of hob of normal-pressure tool changing cutterhead in real time |
Publications (2)
Publication Number | Publication Date |
---|---|
CN108286438A true CN108286438A (en) | 2018-07-17 |
CN108286438B CN108286438B (en) | 2023-04-28 |
Family
ID=62836294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201810101130.2A Active CN108286438B (en) | 2018-02-01 | 2018-02-01 | Device and method for monitoring stress of hob of normal-pressure tool changing cutterhead in real time |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN108286438B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109057814A (en) * | 2018-10-08 | 2018-12-21 | 中铁隧道局集团有限公司 | A kind of disk cutter force measuring structure |
CN109738172A (en) * | 2018-12-28 | 2019-05-10 | 安徽铜都流体科技股份有限公司 | A kind of tool-wear monitoring device of normal pressure tool changing device |
CN110159286A (en) * | 2019-06-24 | 2019-08-23 | 中铁工程装备集团有限公司 | A kind of cutterhead hobboing cutter rotor tooling and rotor method |
CN110331985A (en) * | 2019-07-30 | 2019-10-15 | 中铁工程装备集团有限公司 | Normal pressure cutter knife cylinder retracts extremely detects preventing mean and detection prevention method |
WO2024061531A1 (en) * | 2022-09-23 | 2024-03-28 | Herrenknecht Aktiengesellschaft | Tunnel boring machine |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003087537A1 (en) * | 2002-04-17 | 2003-10-23 | Starloy Corporation | Disk roller cutter and disk roller cutter monitoring system |
CN1818640A (en) * | 2006-03-03 | 2006-08-16 | 广州市盾建地下工程有限公司 | Cutter wear inspection during tunnelling process of tunnel tunneller |
CN103148771A (en) * | 2013-02-27 | 2013-06-12 | 中南大学 | Real-time tunnel boring machine (TBM) hob abrasion monitoring device |
CN103234903A (en) * | 2013-04-01 | 2013-08-07 | 天津大学 | TBM hob abrasion detection device |
CN104792369A (en) * | 2015-04-30 | 2015-07-22 | 中铁工程装备集团有限公司 | Wireless detecting device for rotating speed and abrasion of hobbing cutter of shield machine |
CN105352420A (en) * | 2015-11-09 | 2016-02-24 | 武汉大学 | TBM hobbing cutter wear online real-time monitoring device and monitoring method |
CN106370333A (en) * | 2016-09-21 | 2017-02-01 | 武汉大学 | TBM hobbing cutter stress online real-time monitoring apparatus and monitoring method |
CN106555594A (en) * | 2016-12-05 | 2017-04-05 | 中铁工程装备集团有限公司 | A kind of normal pressure tool changing cutterhead |
CN206132290U (en) * | 2016-10-31 | 2017-04-26 | 中铁工程装备集团有限公司 | Shield constructs quick -witted hobbing cutter measuring force device |
CN207829897U (en) * | 2018-02-01 | 2018-09-07 | 中铁工程装备集团有限公司 | A kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device |
-
2018
- 2018-02-01 CN CN201810101130.2A patent/CN108286438B/en active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003087537A1 (en) * | 2002-04-17 | 2003-10-23 | Starloy Corporation | Disk roller cutter and disk roller cutter monitoring system |
CN1818640A (en) * | 2006-03-03 | 2006-08-16 | 广州市盾建地下工程有限公司 | Cutter wear inspection during tunnelling process of tunnel tunneller |
CN103148771A (en) * | 2013-02-27 | 2013-06-12 | 中南大学 | Real-time tunnel boring machine (TBM) hob abrasion monitoring device |
CN103234903A (en) * | 2013-04-01 | 2013-08-07 | 天津大学 | TBM hob abrasion detection device |
CN104792369A (en) * | 2015-04-30 | 2015-07-22 | 中铁工程装备集团有限公司 | Wireless detecting device for rotating speed and abrasion of hobbing cutter of shield machine |
CN105352420A (en) * | 2015-11-09 | 2016-02-24 | 武汉大学 | TBM hobbing cutter wear online real-time monitoring device and monitoring method |
CN106370333A (en) * | 2016-09-21 | 2017-02-01 | 武汉大学 | TBM hobbing cutter stress online real-time monitoring apparatus and monitoring method |
CN206132290U (en) * | 2016-10-31 | 2017-04-26 | 中铁工程装备集团有限公司 | Shield constructs quick -witted hobbing cutter measuring force device |
CN106555594A (en) * | 2016-12-05 | 2017-04-05 | 中铁工程装备集团有限公司 | A kind of normal pressure tool changing cutterhead |
CN207829897U (en) * | 2018-02-01 | 2018-09-07 | 中铁工程装备集团有限公司 | A kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109057814A (en) * | 2018-10-08 | 2018-12-21 | 中铁隧道局集团有限公司 | A kind of disk cutter force measuring structure |
CN109738172A (en) * | 2018-12-28 | 2019-05-10 | 安徽铜都流体科技股份有限公司 | A kind of tool-wear monitoring device of normal pressure tool changing device |
CN109738172B (en) * | 2018-12-28 | 2023-11-14 | 英诺威阀业有限公司 | Wear monitoring device of normal pressure tool changing device |
CN110159286A (en) * | 2019-06-24 | 2019-08-23 | 中铁工程装备集团有限公司 | A kind of cutterhead hobboing cutter rotor tooling and rotor method |
CN110159286B (en) * | 2019-06-24 | 2024-03-12 | 中铁工程装备集团有限公司 | Cutter head hob turning tool and cutter turning method |
CN110331985A (en) * | 2019-07-30 | 2019-10-15 | 中铁工程装备集团有限公司 | Normal pressure cutter knife cylinder retracts extremely detects preventing mean and detection prevention method |
WO2024061531A1 (en) * | 2022-09-23 | 2024-03-28 | Herrenknecht Aktiengesellschaft | Tunnel boring machine |
Also Published As
Publication number | Publication date |
---|---|
CN108286438B (en) | 2023-04-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN207829897U (en) | A kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device | |
CN108286438A (en) | A kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device and monitoring method | |
CN106370333A (en) | TBM hobbing cutter stress online real-time monitoring apparatus and monitoring method | |
CN106150499A (en) | Split splitting rod | |
CN103760028A (en) | Confining pressure loading device for laboratory rock strength | |
CN106761430A (en) | A kind of rock drilling inserted tooth hob drill bit | |
CN212958633U (en) | Green's shield tunnel entry driving machine cutter device | |
CN201810307U (en) | Cutting mechanism for heading machine | |
CN204094691U (en) | A kind of combination tool to the given pre-fastening moment of tower machine high-strength bolt | |
CN210685996U (en) | A entry driving machine hobbing cutter for complete hard rock | |
CN203658163U (en) | Confining pressure loading device for rock strength test in lab | |
CN203321333U (en) | Modularized and combined cutter head and raise boring machine comprising same | |
CN203685059U (en) | Drill rod pipe casing of rotating drill | |
CN102614957B (en) | Axial positioning device of crushing roller | |
CN207583331U (en) | A kind of water drilling rig feed arrangement at a slow speed | |
CN205703210U (en) | A kind of device for installing plunger displacement pump | |
CN104362561B (en) | Communication pipe capable of monitoring break state | |
CN219992566U (en) | Chain type milling and digging machine | |
CN202973961U (en) | Radiator for mine engineering truck | |
CN215857951U (en) | Hydraulic breaking hammer with integral outer cone and inner circle | |
CN209398376U (en) | A kind of mining high-voltage sealing drilling rod | |
CN203076863U (en) | Keyless-connection intelligent assembly equipment | |
CN202789947U (en) | Device for connecting base with support thereof | |
CN216588445U (en) | Square drill rod assembly | |
CN218270855U (en) | Shield constructs quick-witted spiral shell machine axle fracture, spiral shell machine blade wearing and tearing detecting system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |