CN110137851B - Overhead transmission line hardware fitting dismounting device - Google Patents
Overhead transmission line hardware fitting dismounting device Download PDFInfo
- Publication number
- CN110137851B CN110137851B CN201910471479.XA CN201910471479A CN110137851B CN 110137851 B CN110137851 B CN 110137851B CN 201910471479 A CN201910471479 A CN 201910471479A CN 110137851 B CN110137851 B CN 110137851B
- Authority
- CN
- China
- Prior art keywords
- motor
- transmission line
- overhead transmission
- cutting
- piece
- 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.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 31
- 238000009434 installation Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- KJLPSBMDOIVXSN-UHFFFAOYSA-N 4-[4-[2-[4-(3,4-dicarboxyphenoxy)phenyl]propan-2-yl]phenoxy]phthalic acid Chemical compound C=1C=C(OC=2C=C(C(C(O)=O)=CC=2)C(O)=O)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=C(C(O)=O)C(C(O)=O)=C1 KJLPSBMDOIVXSN-UHFFFAOYSA-N 0.000 abstract 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 7
- 239000010931 gold Substances 0.000 description 7
- 229910052737 gold Inorganic materials 0.000 description 7
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
Landscapes
- Electric Cable Installation (AREA)
Abstract
The invention discloses a hardware fitting dismounting device for an overhead transmission line, and belongs to the technical field of power supply. The defect that an overhead circuit lacks an overhead transmission line hardware fitting dismounting device in the prior art during maintenance is overcome. It mainly includes and embraces the piece tightly down, the lock can make on embrace tightly the piece and embrace the piece tightly mutually and lock down, on embrace and set up fluting and install running gear on the piece tightly, running gear includes walking motor and crawler chassis, on embrace tightly the piece and embrace the one end of piece tightly down and install cutting device, cutting device installs rack and last guide rail on embracing tightly the piece respectively including cutting motor and rotating electrical machines, embraces down and installs rack and lower guide rail on the piece tightly respectively, rotating electrical machines and cutting motor fixed connection, the gear can with last rack and lower rack toothing, the cutting piece is connected through the pivot to the cutting motor. The invention is mainly used for removing hardware fittings on overhead transmission lines.
Description
Technical Field
The invention belongs to the technical field of electricity, and particularly relates to a hardware fitting dismounting device for an overhead transmission line.
Background
Install multiple gold utensil on overhead transmission line, the gold utensil generally exposes in the air, the environment is abominable, can break down after long-time use sometimes, need people to go to change the gold utensil of damage or dismantle this time, at present, the gold utensil generally needs people to operate in person when changing, when the gold utensil is on the wire pole, it is still relatively easier to change, but if the gold utensil is just more troublesome on overhead transmission line, need be with the help of instruments such as aerial ladder, overhead circuit urgently needs overhead transmission line gold utensil to demolish the device when the maintenance at present.
Disclosure of Invention
The invention aims to provide a hardware fitting removing device for an overhead transmission line, which overcomes the defect that the overhead transmission line hardware fitting removing device is lacked when an overhead circuit is maintained in the prior art.
The invention is realized by adopting the following technical scheme: an overhead transmission line hardware fitting removing device comprises an upper holding block and a lower holding block, wherein the upper holding block and the lower holding block are hinged through a hinge shaft and are provided with locks, the locks can enable the upper holding block and the lower holding block to be locked with each other, the upper holding block and the lower holding block are respectively provided with an upper walking groove and a lower walking groove, the cross section of the lower walking groove is semicircular, the upper holding block is provided with a groove and provided with a walking device, the walking device comprises a walking motor and a crawler chassis, the crawler chassis comprises a first crawler and a second crawler and is fixedly connected with the upper holding block, the walking motor comprises a rotating shaft, the rotating shaft penetrates through the groove and is respectively connected with the first crawler and the second crawler through a steering gear, one end of the upper holding block and one end of the lower holding block are provided with a cutting device, the cutting device comprises a cutting motor and a rotating motor, the upper holding block is respectively provided with an upper rack and an upper guide rail, the lower holding block is respectively provided with a lower rack and a lower guide rail, the cross sections of the upper guide rail and the lower guide rail are T-shaped, the upper rack and the lower rack are arranged at the same circumference, the upper guide rail and the lower guide rail are arranged at the same circumference, the bottom of the cutting motor is provided with a T-shaped groove matched with the upper guide rail and the lower guide rail, the rotating motor is fixedly connected with the cutting motor, the rotating motor is connected with a gear through a rotating shaft, the gear can be meshed with the upper rack and the lower rack, the cutting motor is connected with a cutting piece through the rotating shaft, one end of the upper holding block or the lower holding block is provided with a proximity switch, the proximity switch is connected with a walking motor, the cutting motor is provided with a camera, the bottom of the lower holding block is provided with a connecting rod, the connecting rod is provided with a collecting device, the collecting device comprises a collecting basket and a plug, the plug, the collection basket includes support bars that are insertable into the horizontal slots.
Further, the first track and the second track are both rubber tracks.
Further, the walking motor, the rotating motor and the cutting motor are all servo motors.
Further, a coupler is respectively arranged between the first crawler belt and the steering gear and between the second crawler belt and the steering gear.
Further, the cutting machine also comprises a wireless remote controller, wherein the wireless remote controller is respectively connected with the walking motor, the cutting motor and the rotating motor.
Further, the wireless remote controller is an infrared wireless remote controller.
Further, the camera is connected with a display device, and the display device is a mobile phone or a computer.
Further, the lock is a deadbolt lock.
Furthermore, a vertical groove is further formed in the plug, a fixing groove is formed in the supporting rod, a plurality of jacks are formed in the fixing groove, an inserting rod is installed in each jack, a limiting block is fixedly installed at the top of each inserting rod, a spring is installed between each limiting block and the fixing groove, each inserting rod penetrates through the spring, and the top surface of each limiting block is an inclined surface.
Further, a vertical groove cover is arranged at the top of the vertical groove.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the hardware fitting can be well disassembled on the overhead transmission line, the upper clamping block and the lower clamping block are installed, when the upper clamping block and the lower clamping block are locked, the lower clamping block, the first crawler belt and the second crawler belt can be tightly attached to the transmission line, people can remotely control the running motor, the rotating motor and the cutting motor to work through the wireless remote controller, and people can remotely observe the specific position and state of the hardware fitting through the camera and the display equipment.
2. The invention can also automatically collect the dismantled hardware fittings, and the hardware fittings cut by the cutting pieces can fall into the collecting basket by installing the collecting basket, thereby well avoiding the situation that the hardware fittings fall to the ground after being cut and injure people.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a rear view of the present invention;
fig. 4 is a partial enlarged view I of fig. 2.
In the figure: 1. an upper holding block; 2. a lower holding block; 3. hinging a shaft; 4. locking; 5. an upper walking groove; 6. a lower walking groove; 7. grooving; 8. a traveling motor; 9. a first track; 10. a second crawler belt; 11. cutting the motor; 12. a rotating electric machine; 13. an upper rack; 14. an upper guide rail; 15. a lower rack; 16. a lower guide rail; 17. a T-shaped groove; 18. a gear; 19. cutting the slices; 20. a camera; 21. a connecting rod; 22. a collection basket; 23. a plug; 24. a horizontal groove; 25. a support bar; 26. a vertical slot; 27. fixing grooves; 28. a jack; 29. inserting a rod; 30. a limiting block; 31. a spring; 32. and (4) a vertical slot cover.
Detailed Description
The invention will be further explained with reference to the drawings.
An overhead transmission line hardware fitting removing device comprises an upper holding block 1 and a lower holding block 2, wherein the upper holding block 1 and the lower holding block 2 are hinged through a hinge shaft 3 and are provided with a lock 4, the lock 4 can enable the upper holding block 1 and the lower holding block 2 to be locked with each other, the upper holding block 1 and the lower holding block 2 are respectively provided with an upper walking groove 5 and a lower walking groove 6, the cross section of the lower walking groove 6 is semicircular, the upper holding block 1 is provided with a notch 7 and is provided with a walking device, the walking device comprises a walking motor 8 and a crawler chassis, the crawler chassis comprises a first crawler 9 and a second crawler 10 and is fixedly connected with the upper holding block 1, the walking motor 8 comprises a rotating shaft, the rotating shaft penetrates through the notch 7 and is respectively connected with the first crawler 9 and the second crawler 10 through a steering gear, one ends of the upper holding block 1 and the lower holding block 2 are provided with cutting devices, the cutting device comprises a cutting motor 11 and a rotating motor 12, an upper rack 13 and an upper guide rail 14 are respectively installed on an upper holding block 1, a lower rack 15 and a lower guide rail 16 are respectively installed on a lower holding block 2, the cross sections of the upper guide rail 14 and the lower guide rail 16 are both T-shaped, the upper rack 13 and the lower rack 15 are at the same circumferential surface, the upper guide rail 14 and the lower guide rail 16 are at the same circumferential surface, a T-shaped groove 17 matched with the upper guide rail 14 and the lower guide rail 16 is arranged at the bottom of the cutting motor 11, the rotating motor 12 is fixedly connected with the cutting motor 11, the rotating motor 12 is connected with a gear 18 through a rotating shaft, the gear 18 can be meshed with the upper rack 13 and the lower rack 15, the cutting motor 11 is connected with a cutting piece 19 through a rotating shaft, a proximity switch is installed at one end of the upper holding block 1 or the lower holding block 2, the proximity switch is connected with a walking motor 8, and a camera 20, hold 2 bottom erection joint poles 21 of piece tightly down, installation collection device on the connecting rod 21, collection device is including collecting basket 22 and plug 23, plug 23 fixed mounting is on connecting rod 21, offers horizontal groove 24 on the plug 23, and collecting basket 22 includes bracing piece 25, bracing piece 25 can insert in the horizontal groove 24.
The radial distance of the space between the first crawler belt 9 and the lower crawler belt and the lower walking groove 6 is similar to the diameter of a thicker electric wire such as a high-voltage transmission line. The T-shaped groove 17 on the cutting motor 11 can be inserted into the upper guide rail 14 and the lower guide rail 16, and when the upper holding block 1 and the lower holding block 2 are locked with each other, the upper guide rail 14 and the lower guide rail 16 can well prevent the cutting motor 11 from falling.
The first track 9 and the second track 10 are both rubber tracks.
The first crawler belt 9 and the second crawler belt 10 are both rubber type crawler belts, and the rubber type crawler belts have certain elasticity and friction force, so that the power transmission lines can be prevented from being excessively clamped and the power transmission lines can be prevented from sliding.
The walking motor 8, the rotating motor 12 and the cutting motor 11 are all servo motors.
Couplings are respectively arranged between the first crawler belt 9 and the second crawler belt 10 and the steering gear.
The walking motor 8 transmits kinetic energy to the steering gear through a rotating shaft, the steering gear is a steering gear with double-shaft output, and the steering gear transmits the kinetic energy to the first crawler belt 9 and the second crawler belt 10 through the coupling.
The cutting machine is characterized by further comprising a wireless remote controller, wherein the wireless remote controller is respectively connected with the walking motor 8, the cutting motor 11 and the rotating motor 12.
The wireless remote controller is an infrared wireless remote controller.
The camera 20 is connected with a display device, and the display device is a mobile phone or a computer.
The lock 4 is a deadbolt lock.
The plug 23 is further provided with a vertical groove 26, the support rod 25 is provided with a fixing groove 27, the fixing groove 27 is internally provided with a plurality of jacks 28, the jacks 28 are internally provided with insertion rods 29, the tops of the insertion rods 29 are fixedly provided with limit blocks 30, springs 31 are arranged between the limit blocks 30 and the fixing groove 27, the insertion rods 29 penetrate through the springs 31, and the top surfaces of the limit blocks 30 are inclined planes.
A vertical slot cover 32 is arranged on the top of the vertical slot 26.
The vertical chute cover 32 of the present invention prevents foreign matter from falling into the vertical chute 26.
The working process is as follows:
firstly, the invention is taken on a power transmission line to be cleaned, an upper holding block 1 and a lower holding block 2 are locked with each other through a lock 4, the power transmission line is enabled to be between the upper holding block 1 and the lower holding block 2, then a support rod 25 is inserted into a horizontal groove 24, in the insertion process of the support rod 25, the horizontal groove 24 firstly extrudes a limit block 30, the limit block 30 moves downwards and compresses a spring 31 until the limit block 30 completely enters the area of a vertical groove 26, the spring 31 acts on the limit block 30 to move upwards and enable the limit block 30 to enter the vertical groove 26, so that the installation of a collecting basket 22 is completed, then a wireless remote controller is used for remotely controlling a walking motor 8 to work, so that the invention advances along the power transmission line until an object at a certain distance in front is sensed by a proximity switch, the walking motor 8 stops working, a camera 20 and a display device can observe the front condition, if the hardware is to be cleaned, we can remote control the rotating motor 12 to work through the wireless remote controller, the gear 18 rotates on the upper rack 13 and the lower rack 15, thereby the cutting motor 11 rotates around the rack until the cutting motor 11 rotates to a proper position, then the wireless remote controller remote control walking motor 8 walks forwards for a certain distance, finally the cutting motor 11 works is remotely controlled, the cutting piece 19 cuts the hardware, because the hardware is generally in a fixed state during working, the hardware cannot shake at will, certain convenience is provided for the cutting work, when the cutting is completed, the cut hardware falls into the collecting basket 22, the remote control walking motor 8 drives the invention to return to an initial position, the limiting block 30 in the vertical groove is pressed through fingers, the limiting block 30 presses the spring 31 downwards, and meanwhile, the supporting rod 25 is drawn out from the horizontal groove 24.
Claims (10)
1. An overhead transmission line hardware fitting removing device comprises an upper holding block (1) and a lower holding block (2), wherein the upper holding block (1) and the lower holding block (2) are hinged through a hinge shaft (3) and are provided with locks (4), the locks (4) can enable the upper holding block (1) and the lower holding block (2) to be locked with each other, the upper holding block (1) and the lower holding block (2) are respectively provided with an upper walking groove (5) and a lower walking groove (6), the cross section of the lower walking groove (6) is semicircular, the upper holding block (1) is provided with a slot (7) and is provided with a walking device, the walking device comprises a walking motor (8) and a crawler chassis, the crawler chassis comprises a first crawler (9) and a second crawler (10) and is fixedly connected with the upper holding block (1), the walking motor (8) comprises a rotating shaft, the rotating shaft penetrates through the slot (7) and is respectively connected with the first crawler (9) and the second crawler (10) through a steering gear, the cutting device is installed at one end of the upper clasping block (1) and the lower clasping block (2) and comprises a cutting motor (11) and a rotating motor (12), the upper clasping block (1) is respectively provided with an upper rack (13) and an upper guide rail (14), the lower clasping block (2) is respectively provided with a lower rack (15) and a lower guide rail (16), the cross sections of the upper guide rail (14) and the lower guide rail (16) are T-shaped, the upper rack (13) and the lower rack (15) are arranged at the same circumferential surface, the upper guide rail (14) and the lower guide rail (16) are arranged at the same circumferential surface, the bottom of the cutting motor (11) is provided with a T-shaped groove (17) matched with the upper guide rail (14) and the lower guide rail (16), the rotating motor (12) is fixedly connected with the cutting motor (11), the rotating motor (12) is connected with a gear (18) through a rotating shaft, and the gear (18) can be meshed with the upper rack (13) and the lower rack (15, cutting motor (11) connect cutting piece (19) through the pivot, go up to embrace tightly piece (1) or embrace tightly piece (2) one end installation proximity switch down, proximity switch connects walking motor (8), install camera (20) on cutting motor (11), embrace tightly piece (2) bottom erection joint pole (21) down, install collection device on connecting rod (21), collection device is including collecting basket (22) and plug (23), plug (23) fixed mounting is on connecting rod (21), offers horizontal groove (24) on plug (23), and collection basket (22) includes bracing piece (25), bracing piece (25) can insert in horizontal groove (24).
2. The overhead transmission line fitting dismantling device according to claim 1, characterized in that: the first track (9) and the second track (10) are both rubber tracks.
3. The overhead transmission line fitting dismantling device according to claim 1, characterized in that: couplings are respectively arranged between the first crawler belt (9) and the second crawler belt (10) and the steering gear.
4. The overhead transmission line fitting dismantling device according to claim 1, characterized in that: the walking motor (8), the rotating motor (12) and the cutting motor (11) are all servo motors.
5. The overhead transmission line fitting dismantling device according to claim 1, characterized in that: the cutting machine is characterized by further comprising a wireless remote controller, wherein the wireless remote controller is respectively connected with the walking motor (8), the cutting motor (11) and the rotating motor (12).
6. The overhead transmission line fitting dismantling device according to claim 5, characterized in that: the wireless remote controller is an infrared wireless remote controller.
7. The overhead transmission line fitting dismantling device according to claim 1, characterized in that: the camera (20) is connected with a display device, and the display device is a mobile phone or a computer.
8. The overhead transmission line fitting dismantling device according to claim 1, characterized in that: the lock (4) is a deadbolt lock.
9. The overhead transmission line fitting dismantling device according to claim 1, characterized in that: still seted up vertical groove (26) on plug (23), seted up fixed slot (27) on bracing piece (25), seted up a plurality of jacks (28) in fixed slot (27), installation inserted bar (29) in jack (28), inserted bar (29) top fixed mounting stopper (30), install spring (31) between stopper (30) and fixed slot (27), inserted bar (29) pass spring (31), the top surface of stopper (30) is the inclined plane.
10. The overhead transmission line fitting dismantling device according to claim 9, characterized in that: and a vertical groove cover (32) is arranged at the top of the vertical groove (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910471479.XA CN110137851B (en) | 2019-05-31 | 2019-05-31 | Overhead transmission line hardware fitting dismounting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910471479.XA CN110137851B (en) | 2019-05-31 | 2019-05-31 | Overhead transmission line hardware fitting dismounting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110137851A CN110137851A (en) | 2019-08-16 |
| CN110137851B true CN110137851B (en) | 2021-01-01 |
Family
ID=67583502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910471479.XA Active CN110137851B (en) | 2019-05-31 | 2019-05-31 | Overhead transmission line hardware fitting dismounting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110137851B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821279B (en) * | 2021-01-22 | 2022-09-06 | 国网上海市电力公司 | Overhead transmission line hardware fitting removing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204497700U (en) * | 2015-03-02 | 2015-07-22 | 江南大学 | Trolley wire ice removal |
| CN205343238U (en) * | 2016-02-27 | 2016-06-29 | 河北工业大学 | Large pipe axial automatic cutout machine |
| CN106655004A (en) * | 2017-02-09 | 2017-05-10 | 国网湖北省电力公司电力科学研究院 | Multidimensional removal device for fittings of overhead transmission line |
| CN107404087A (en) * | 2017-09-20 | 2017-11-28 | 国家电网公司 | A kind of transmission line of electricity removes foreign matter device |
| CN108115161A (en) * | 2017-11-16 | 2018-06-05 | 天长市天翔集团有限公司 | A kind of steel pipe cutting mechanical clamp |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7293362B2 (en) * | 2003-10-20 | 2007-11-13 | Ideal Industries, Inc. | Drill powered cable cutter |
| CN101752818A (en) * | 2010-03-19 | 2010-06-23 | 湖北省电力公司宜昌夷陵区供电公司 | Driving mechanism for automatically deicing robot along overhead high voltage transmission line |
-
2019
- 2019-05-31 CN CN201910471479.XA patent/CN110137851B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204497700U (en) * | 2015-03-02 | 2015-07-22 | 江南大学 | Trolley wire ice removal |
| CN205343238U (en) * | 2016-02-27 | 2016-06-29 | 河北工业大学 | Large pipe axial automatic cutout machine |
| CN106655004A (en) * | 2017-02-09 | 2017-05-10 | 国网湖北省电力公司电力科学研究院 | Multidimensional removal device for fittings of overhead transmission line |
| CN107404087A (en) * | 2017-09-20 | 2017-11-28 | 国家电网公司 | A kind of transmission line of electricity removes foreign matter device |
| CN108115161A (en) * | 2017-11-16 | 2018-06-05 | 天长市天翔集团有限公司 | A kind of steel pipe cutting mechanical clamp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110137851A (en) | 2019-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103624019B (en) | insulator automatic scrubber | |
| CN202142657U (en) | Ground line hitching device | |
| CN103675487B (en) | Production line for electrical safety test of air conditioner | |
| CN110137851B (en) | Overhead transmission line hardware fitting dismounting device | |
| CN205301375U (en) | Electroscope installing support | |
| CN115201221B (en) | Detection device and detection method for preventing power cable from being broken outwards | |
| CN207566626U (en) | A kind of well cable maintenance retractable equipment | |
| CN111431088A (en) | Automatic maintenance device for power transmission line | |
| CN117117641B (en) | Multifunctional power distribution cabinet for communication network base station | |
| CN203816950U (en) | Automatic insulator scrubbing device | |
| CN209797167U (en) | Portable telescopic electric wire positioner | |
| CN201230166Y (en) | Tool for replacing anti-tension whole string insulator | |
| CN204886031U (en) | Device of supplementary wiring | |
| CN111799695A (en) | High-voltage connector overhauling support | |
| CN221150767U (en) | Crossing frame for power transmission and transformation engineering | |
| CN220522202U (en) | Rail guard is used in road construction | |
| CN219677777U (en) | Electrical cabinet grounding device | |
| CN214901768U (en) | Arbitrary combination device of ozone discharge chamber module and power module | |
| CN205304046U (en) | Electrified disconnect device of transformer substation's pigtail splice | |
| CN112803293B (en) | Auxiliary assembly that construction of environment-friendly wiring engineering was used | |
| CN219571492U (en) | Sound collecting device | |
| CN220117809U (en) | Shaping tool type stair protection railing | |
| CN220927890U (en) | Special accessory for railway slope protection building | |
| CN215733254U (en) | Intelligent wiring ware of building | |
| CN221218766U (en) | Groove brushing device for underground diaphragm wall construction |
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 |