CN204567984U - A kind of tower mast automatic collision mechanism - Google Patents
A kind of tower mast automatic collision mechanism Download PDFInfo
- Publication number
- CN204567984U CN204567984U CN201520235478.2U CN201520235478U CN204567984U CN 204567984 U CN204567984 U CN 204567984U CN 201520235478 U CN201520235478 U CN 201520235478U CN 204567984 U CN204567984 U CN 204567984U
- Authority
- CN
- China
- Prior art keywords
- mast
- gear
- obstacle
- engages
- pedestal
- 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.)
- Expired - Fee Related
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 58
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims description 20
- 230000010355 oscillation Effects 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003028 elevating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Traffic Control Systems (AREA)
Abstract
The utility model discloses a kind of tower mast automatic collision mechanism, mast pedestal is provided with horizontal shaft, bottom and the horizontal shaft of mast are hinged, the mast motor be arranged on mast is engaged with reducing gear by driven wheel, intermediate gear, mast pedestal is provided with the fixed gear wheel coaxial with horizontal shaft, described reducing gear engages with fixed gear wheel, mast terminal part below horizontal shaft is provided with clump weight, and mast pedestal both sides are provided with for detecting the obstacle detector of ship's navigation preceding object thing and the obstacle sensor for detecting obstacle above boats and ships.It efficiently solves the mast lift of prior art easily because carelessness or erroneous judgement cause the problem of collision case, obstacle can detect and the mast that automatically fell automatically in tower mast automatic collision mechanism of the present utility model, guarantee safety of navigation, there is very high practical value.
Description
Technical field
The utility model relates to ship mast lifting technology field, especially relates to a kind of tower mast automatic collision mechanism that can effectively prevent the obstacles such as boats and ships mast and bridge from colliding.
Background technology
Mast is generally all installed on the highest ceiling centerline of boats and ships, for installing radar, running light and communication antenna etc., very important safety facilities when being ship's navigation.The structural shape of mast has single-column rod-type, tower-type etc. usually.When passing through under ship builds a bridge etc. from the water surface, if the mast on ship may collide with bridge, then needing to fall in advance (or putting down) mast, after reducing height, safety of ship just can be made to pass through.The mast of the prior art process need that fell manually determines whether front has the air draft of the obstacles such as obstacle and bridge such as bridge in advance, is determined whether to need to be fallen by mast in advance to avoid colliding again after determining obstacle height by crewman according to the air draft of ship upper mast.But the in fact air draft of the obstacle such as bridge relevant with water surface height (water surface as flood tide is ebbed tide, flood etc. causes just changes), and the air draft of ship upper mast is also relevant with the drinking water depth of ship, therefore, need to be grasped a lot of data just can make and judging accurately at every turn; The work capacity of this crewman not only increased, also easily occur that carelessness or erroneous judgement cause collision case to occur simultaneously, thus cause great property damage, when especially boats and ships navigate by water at night, this problem is just more outstanding.Publication date is on September 18th, 2013, publication number is that the Chinese patent literature of CN103303435A discloses a kind of mast lift, comprise pedestal, mast base and mast, described pedestal is also fixedly installed screw foot, described screw foot is provided with movable pillar and screw rod, described screw rod is provided with the driving device be in transmission connection with it, described mast is fixedly installed lifting pedestal, described lifting pedestal is provided with the movable pillar be rotationally connected with it, described screw rod is threaded with described movable pillar, described movable pillar is identical around the rotation direction of described mast base with described mast with the rotation direction of described movable pillar.This structure is hinged run-on point with the lower end of mast, adopt screw mandrel to rotate through feed screw nut drive mast to fall or rise, although screw mandrel and nut screw connection have labor-saving effect, because mast is higher, therefore screw mandrel is stressed very large, and hand lifting/lowering is relatively required great effort; In addition, this structure does not solve crewman yet and occurs neglecting or erroneous judgement may cause the problem of collision case.
Utility model content
The purpose of this utility model is that the mast lift for solving prior art easily causes collision case because neglecting or judging by accident, thus there is the problem of the heavy losses of property, there is provided one automatically can detect obstacle, avoid the tower mast automatic collision mechanism causing the heavy losses of property.
The utility model is solve the problems of the technologies described above the concrete technical scheme adopted to be, a kind of tower mast automatic collision mechanism, described tower mast is rotating to be arranged on the mast pedestal of boats and ships, described pedestal is provided with a horizontal shaft vertical with direction of ship travel, bottom and the horizontal shaft of mast are hinged, mast is provided with mast motor, the output shaft of mast motor is provided with driven wheel, driven wheel engages with an intermediate gear, the wheel shaft of intermediate gear is provided with reducing gear, mast pedestal is provided with the fixed gear wheel coaxial with horizontal shaft, described reducing gear engages with fixed gear wheel, mast terminal part below horizontal shaft is provided with clump weight, during mast electric machine rotation, driven wheel drives reducing gear to rotate by intermediate gear, mast rotates relative to horizontal shaft and fixed gear wheel, mast pedestal is provided with for detecting the obstacle detector of ship's navigation preceding object thing and the obstacle sensor for detecting obstacle above boats and ships, obstacle detector comprises detection module and swinging gear, described swinging gear comprises point the horizontal hunting mechanism being located at pedestal both sides and a vertical oscillation mechanism, described detection module is two, is separately positioned in horizontal hunting mechanism and vertical oscillation mechanism, tower mast automatic collision mechanism also comprises control setup and warning device, and control setup connects mast motor, obstacle detector and warning device.
Tower mast of the present utility model is arranged on mast pedestal, mast pedestal is provided with a horizontal shaft vertical with direction of ship travel, bottom and the horizontal shaft of mast are hinged, mast is provided with mast motor, the output shaft of mast motor is provided with driven wheel, driven wheel engages with intermediate gear, the reducing gear coaxial with intermediate gear engages with the fixed gear wheel of horizontal shaft end, mast bottom is provided with clump weight, during mast electric machine rotation, driven wheel drives reducing gear to rotate by intermediate gear, because fixed gear wheel and pedestal are fixed, therefore mast rotates relative to horizontal shaft and fixed gear wheel.This mast structure is provided with clump weight due to mast foot, therefore the mast of horizontal shaft both sides is substantially identical relative to the moment of horizontal shaft, make mast rotation lifting process very laborsaving, so both solve the problem that mast shaft should have enough height immediately, also mast monolateral rotation lifting needs are avoided to overcome very high-torque, need the problem of larger power, adopt less motor can meet mast lifting needs.
Obstacle detector is for automatically detecting the obstacle that direction of ship travel may collide with boats and ships mast, swinging gear realizes obstacle detector and detects obstacle in certain scope interscan, horizontal hunting mechanism is used for horizontal direction and detects, vertical oscillation mechanism is used for vertical direction and detects, guarantee that the obstacle that may collide with mast within the scope of a criss-cross on ship running direction is all detected, ensure navigation safety.Obstacle sensor can detect boats and ships and whether have passed the obstacles such as bridge; Control setup can control mast elevating system according to the different situations of obstacle and put down mast or give a warning, and mast was fallen automation, avoids because manually-operated carelessness or erroneous judgement cause collision case, and then cause the problem of the heavy losses of property.And the obstacle sensor pointed into the sky can detect boats and ships whether have passed the obstacles such as bridge, because may two states be there is after mast fell, one is above boats and ships, occur obstacle (such as bridge), boats and ships can detect obstacle through out-of-date obstacle sensor from below, easily judge whether boats and ships clear the jumps, again to be risen by mast according to detection data.Another kind is that the obstacle sensor pointed into the sky after mast fell does not detect obstacle, the obstacle detected that now can judge above is positioned at the side (such as similar ship lock structure) of boats and ships, therefore, when the long period does not detect obstacle, also mast should be risen again.
As preferably, detection module is laser rangefinder, and effective detecting distance of laser rangefinder is not less than 1000 meters.The utility model detection module adopts laser rangefinder, can emission pulse laser bundle, utilizes reflected light rays to judge whether to there is obstacle, and utilizes and to emit beam and time difference between reflected light rays calculates distance.
As preferably, swinging gear comprises an oscillating motor, the dynamical axis of oscillating motor is folded and is provided with forward drive gear and reverse drive gear, forward drive gear and reverse drive gear are the identical quadrant gear of the number of teeth and misplace and arrange, swinging gear also comprises wobble gear, forward drive gear engages with wobble gear discountinuity, reverse drive gear engages with reversing gear discountinuity, reversing gear engages with wobble gear, wobble gear is engaged with swing output gear by a under drive gear, when forward drive gear engages with wobble gear, reverse drive gear departs from reversing gear and engages, when reverse drive gear engages with reversing gear, forward drive gear departs from wobble gear and engages, detection module is fixed on and swings on output gear.
Oscillating motor drives forward drive gear and the equidirectional rotation of reverse drive gear by axle drive shaft, when forward drive gear engages with wobble gear, wobble gear rotates backward and drives swing output gear to rotate forward by a under drive gear, forward drive gear is rotated further to depart from wobble gear and engages, wobble gear stops operating, now reverse drive gear engages with reversing gear, reverse drive gear drives wobble gear to rotate forward by reversing gear, after reverse drive gear is rotated further and departs from reversing gear and engage, forward drive gear starts again to engage with wobble gear, repeat said process, realize the continuous rotating band movable pendulum of motor and move swinging back and forth by a small margin of output gear, thus realize obstacle detector further at certain scope interscan detection obstacle, guarantee that the obstacle in the certain limit on ship running direction is all detected, ensure navigation safety.Horizontal hunting mechanism of the present utility model is consistent with the inner structure of vertical oscillation mechanism, and the direction of just installing is different, and one swings in the horizontal direction, and one swings in the vertical direction.The mechanism that swings back and forth of prior art adopts motor positive and inverse to realize usually, but the shortcoming one of motor positive and inverse needs complicated control system, and two is that the frequent rotating of motor can affect its service life, is not suitable for working long hours; And rotating of the present utility model is realized by physical construction completely, solve the problems referred to above satisfactorily, can work long hours.
As preferably, the pendulum angle of horizontal hunting mechanism is 1 to 2 degree, and the pendulum angle of vertical oscillation mechanism is 2 to 3 degree, and the hunting frequency of vertical oscillation mechanism is identical with the hunting frequency of horizontal hunting mechanism.The pendulum angle of horizontal hunting mechanism and the pendulum angle size of vertical oscillation mechanism determine the scanning range size of obstacle detector on certain detecting distance; Pendulum angle is larger, and corresponding detection range is larger, but to collide the possibility that irrelevant obstacle occurs also larger with mast, easily affects accuracy of detection; Pendulum angle is less, and corresponding detection range is less, although to collide the possibility that irrelevant obstacle occurs also less with mast, may miss some obstacle, the latticed obstacle such as special bridge.In addition, because detection of obstacles of the present utility model is as just the crashproof consideration of mast, and lower than the technical matters that the obstacle of mast pedestal can solve owing to not belonging to the utility model, not in limit of consideration of the present utility model.Therefore the pendulum angle of vertical oscillation mechanism can be determined in conjunction with suitable detecting distance according to the mast height on mast pedestal, here suitable detecting distance considers to determine afterwards fell required time, safety allowance etc. of the maximum speed that may occur, mast, and those skilled in the art easily accomplish.And the pendulum angle of horizontal hunting mechanism is except considering that obstacle may be a kind of downward opening gap structure, this structure perhaps boats and ships can from middle safety, if but certain direction skew may be there is in the boats and ships that look to the future, and may collide after skew, therefore also should consider to fall mast in advance to avoid colliding.
As preferably, mast pedestal is provided with mast rotating limit device, and mast rotating limit device comprises limit switch and spacing elastic buffer block, and during mast electric machine rotation, mast maximum rotation angle is 90 degree.The end position that mast rotating limit device rotates for limiting mast, when mast turns to level attitude, limit switch is closed to be sent mast and to rotate in place signal, and mast motor stalls, spacing elastic buffer block can play buffer action.
As preferably, a wherein rooted tooth wheel shaft of the gear drive between driven wheel and fixed gear wheel is provided with handwheel.By being arranged on the handwheel on a rooted tooth wheel shaft, hand lifting/lowering mast can also be realized, simultaneously also lighter during hand lifting/lowering mast, compare the problem of effort when solving the mast hand lifting/lowering of prior art.
The beneficial effects of the utility model are, it efficiently solves the mast lift of prior art easily because carelessness or erroneous judgement cause collision case, thus there is the problem of the heavy losses of property, obstacle can detect and the mast that automatically fell automatically in mast automatic collision mechanism of the present utility model, avoid colliding and cause the heavy losses of property, guarantee safety of navigation, there is very high practical value.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the utility model tower mast automatic collision mechanism;
Fig. 2 is a kind of drive mechanism schematic diagram of the utility model tower mast automatic collision mechanism;
Fig. 3 is a kind of structural representation of the utility model vertical oscillation mechanism.
In figure: 1. mast, 2. mast pedestal, 3. horizontal shaft, 4. mast motor, 5. driven wheel, 6. intermediate gear, 7. reducing gear, 8. fixed gear wheel, 9. clump weight, 10. handwheel, 11. detection modules, 12. obstacle sensors, 13. horizontal hunting mechanisms, 14. vertical oscillation mechanisms, 21. dynamical axiss, 22. forward drive gears, 23. reverse drive gears, 24. wobble gears, 25. reversing gears, 26. under drive gears, 27. swing output gear.
Detailed description of the invention
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1
In such as Fig. 1 embodiment illustrated in fig. 21, a kind of tower mast automatic collision mechanism, described tower mast 1 is rotating to be arranged on the mast pedestal 2 of boats and ships, described pedestal is provided with a horizontal shaft 3 vertical with direction of ship travel, bottom and the horizontal shaft of mast are hinged, and mast pedestal is provided with mast rotating limit device, and mast rotating limit device comprises limit switch and spacing elastic buffer block, during mast electric machine rotation, mast maximum rotation angle is 90 degree.Mast is provided with mast motor 4, the output shaft of mast motor is provided with driven wheel 5, driven wheel engages with an intermediate gear 6, the wheel shaft of intermediate gear is provided with reducing gear 7, mast pedestal is provided with the fixed gear wheel 8 coaxial with horizontal shaft, described reducing gear engages with fixed gear wheel, mast terminal part below horizontal shaft is provided with clump weight 9, a wherein rooted tooth wheel shaft of the gear drive between driven wheel and fixed gear wheel is provided with handwheel 10, during mast electric machine rotation, driven wheel drives reducing gear to rotate by intermediate gear, mast rotates relative to horizontal shaft and fixed gear wheel.Mast pedestal is provided with the obstacle detector for detecting ship's navigation preceding object thing and the obstacle sensor 12 for detecting obstacle above boats and ships, obstacle detector comprises detection module 11 and swinging gear, described detection module is laser rangefinder, and effective detecting distance of laser rangefinder is not less than 1000 meters.Described swinging gear comprises point horizontal hunting mechanism being located at pedestal both sides 13 and vertical oscillation mechanism 14, described detection module is two, be separately positioned in horizontal hunting mechanism and vertical oscillation mechanism, the pendulum angle of horizontal hunting mechanism is 1 to 2 degree, the pendulum angle of vertical oscillation mechanism is 2 to 3 degree, and the hunting frequency of vertical oscillation mechanism is identical with the hunting frequency of horizontal hunting mechanism.Tower mast automatic collision mechanism also comprises control setup and warning device, and control setup connects mast motor, obstacle detector and warning device.
Embodiment 2
The swinging gear (see figure 3) of embodiment 2 comprises an oscillating motor (not shown in FIG.), the dynamical axis 21 of oscillating motor is folded and is provided with forward drive gear 22 and reverse drive gear 23, forward drive gear and reverse drive gear are the identical quadrant gear of the number of teeth and misplace and arrange, swinging gear also comprises wobble gear 24, forward drive gear engages with wobble gear discountinuity, reverse drive gear engages with reversing gear 25 discountinuity, reversing gear engages with wobble gear, wobble gear is engaged with swing output gear 27 by a under drive gear 26, when forward drive gear engages with wobble gear, reverse drive gear departs from reversing gear and engages, when reverse drive gear engages with reversing gear, forward drive gear departs from wobble gear and engages, detection module is fixed on and swings on output gear, all the other are identical with embodiment 1.
The utility model is placed obstacles thing detecting device on mast pedestal, automatically the obstacle that direction of ship travel may collide with boats and ships mast can be detected, swinging gear realizes obstacle detector and detects obstacle in certain scope interscan, guarantee that the obstacle that may collide with mast within the scope of a criss-cross on ship running direction is all detected, and the obstacle sensor pointed into the sky can also detect boats and ships and whether have passed the obstacles such as bridge, ensure navigation safety.Control setup can control mast elevating system according to the different situations of obstacle and put down mast or give a warning, and mast was fallen automation, avoids because manually-operated carelessness or erroneous judgement cause collision case.
Claims (7)
1. a tower mast automatic collision mechanism, described tower mast is rotating to be arranged on the mast pedestal of boats and ships, it is characterized in that, described pedestal is provided with a horizontal shaft vertical with direction of ship travel (3), bottom and the horizontal shaft of mast are hinged, mast is provided with mast motor (4), the output shaft of mast motor is provided with driven wheel (5), driven wheel engages with an intermediate gear (6), the wheel shaft of intermediate gear is provided with reducing gear (7), mast pedestal is provided with the fixed gear wheel (8) coaxial with horizontal shaft, described reducing gear engages with fixed gear wheel, mast terminal part below horizontal shaft is provided with clump weight (9), during mast electric machine rotation, driven wheel drives reducing gear to rotate by intermediate gear, mast rotates relative to horizontal shaft and fixed gear wheel, mast pedestal is provided with the obstacle detector for detecting ship's navigation preceding object thing and the obstacle sensor (12) for detecting obstacle above boats and ships, obstacle detector comprises detection module (11) and swinging gear, described swinging gear comprises point horizontal hunting mechanism (13) being located at pedestal both sides and vertical oscillation mechanism (14), described detection module is two, is separately positioned in horizontal hunting mechanism and vertical oscillation mechanism, tower mast automatic collision mechanism also comprises control setup and warning device, and control setup connects mast motor, obstacle detector and warning device.
2. tower mast automatic collision mechanism according to claim 1, is characterized in that, described detection module is laser rangefinder, and effective detecting distance of laser rangefinder is not less than 1000 meters.
3. tower mast automatic collision mechanism according to claim 1, it is characterized in that, described swinging gear comprises an oscillating motor, upper the folding of the dynamical axis (21) of oscillating motor is provided with forward drive gear (22) and reverse drive gear (23), forward drive gear and reverse drive gear are the identical quadrant gear of the number of teeth and misplace and arrange, swinging gear also comprises wobble gear (24), forward drive gear engages with wobble gear discountinuity, reverse drive gear engages with reversing gear (25) discountinuity, reversing gear engages with wobble gear, wobble gear is engaged with swing output gear (27) by a under drive gear (26), when forward drive gear engages with wobble gear, reverse drive gear departs from reversing gear and engages, when reverse drive gear engages with reversing gear, forward drive gear departs from wobble gear and engages, detection module is fixed on and swings on output gear.
4. tower mast automatic collision mechanism according to claim 1, it is characterized in that, the pendulum angle of horizontal hunting mechanism is 1 to 2 degree, and the pendulum angle of vertical oscillation mechanism is 2 to 3 degree, and the hunting frequency of vertical oscillation mechanism is identical with the hunting frequency of horizontal hunting mechanism.
5. tower mast automatic collision mechanism according to claim 1, it is characterized in that, mast pedestal is provided with mast rotating limit device, and mast rotating limit device comprises limit switch and spacing elastic buffer block.
6. tower mast automatic collision mechanism according to claim 1, is characterized in that, during mast electric machine rotation, mast maximum rotation angle is 90 degree.
7. the tower mast automatic collision mechanism according to any one of claim 1-6, is characterized in that, a wherein rooted tooth wheel shaft of the gear drive between driven wheel and fixed gear wheel is provided with handwheel (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520235478.2U CN204567984U (en) | 2015-04-17 | 2015-04-17 | A kind of tower mast automatic collision mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520235478.2U CN204567984U (en) | 2015-04-17 | 2015-04-17 | A kind of tower mast automatic collision mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204567984U true CN204567984U (en) | 2015-08-19 |
Family
ID=53860658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520235478.2U Expired - Fee Related CN204567984U (en) | 2015-04-17 | 2015-04-17 | A kind of tower mast automatic collision mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204567984U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105035263A (en) * | 2015-05-13 | 2015-11-11 | 浙江海洋学院 | Tower-shaped mast anti-impact device and method thereof |
-
2015
- 2015-04-17 CN CN201520235478.2U patent/CN204567984U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105035263A (en) * | 2015-05-13 | 2015-11-11 | 浙江海洋学院 | Tower-shaped mast anti-impact device and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104943822B (en) | Cylindricality mast lift and its method | |
| CN105571905B (en) | A kind of surface seawater multipoint mode collecting device | |
| CN104908888B (en) | Cylindricality mast anticollision device, collision-prevention device and its method | |
| CN202881892U (en) | Blowing nozzle automatic anti-collision system of snow blowing machine and snow blowing machine | |
| CN204567978U (en) | A kind of cylindricality mast automatic collision mechanism | |
| CN204567982U (en) | A kind of cylindricality mast elevating system | |
| CN104908887A (en) | Automatic anti-collision device and method for tower-shaped mast | |
| CN105083469A (en) | Automatic lifting device and method of cylindrical mast | |
| CN204567984U (en) | A kind of tower mast automatic collision mechanism | |
| CN204567985U (en) | A kind of tower mast anticollision mechanism | |
| CN118376201B (en) | Tunnel deformation detection system | |
| CN204567977U (en) | A kind of tower mast automatic hoisting mechanism | |
| CN204567979U (en) | A kind of tower mast lifting mechanism | |
| CN204567981U (en) | A kind of cylindricality mast automatic hoisting mechanism | |
| CN105083468A (en) | Automatic anti-collision device and method of cylindrical mast | |
| CN112859097B (en) | Laser radar device for unmanned aerial vehicle distance measurement and obstacle avoidance | |
| CN204567980U (en) | A kind of cylindricality mast anticollision mechanism | |
| CN101477379B (en) | Optoelectronic feedback oscillating control device | |
| CN205176667U (en) | Intelligent boats and ships self -adaptation alongside auxiliary system | |
| CN104925218B (en) | Automatic lifting device and method for tower-shaped mast | |
| CN210391511U (en) | Early warning device for ship safe navigation | |
| CN108817931A (en) | From dynamic circuit connector side screws apptss | |
| CN203534584U (en) | Automatic monitoring early warning system of tailing pond dry beach | |
| CN105015706B (en) | Lifting device and method of tower-shaped mast | |
| CN105035263A (en) | Tower-shaped mast anti-impact device and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20160417 |