CN202296995U - Hydraulic servo synchronous lifting device - Google Patents
Hydraulic servo synchronous lifting device Download PDFInfo
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- CN202296995U CN202296995U CN2011203452799U CN201120345279U CN202296995U CN 202296995 U CN202296995 U CN 202296995U CN 2011203452799 U CN2011203452799 U CN 2011203452799U CN 201120345279 U CN201120345279 U CN 201120345279U CN 202296995 U CN202296995 U CN 202296995U
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Abstract
The utility model provides a hydraulic servo synchronous lifting device. The hydraulic servo synchronous lifting device comprises a plurality of hydraulic executing mechanisms, a hydraulic station, sensors and a central controller, wherein each hydraulic executing mechanism comprises a servo cylinder and a servo valve; the hydraulic station is connected with the plurality of hydraulic executing mechanisms through hydraulic pipelines to form a hydraulic loop; the sensors are respectively arranged on the servo cylinders and are used for detecting displacements of the piston rods of the corresponding servo cylinders; and the central controller is pre-provided with an ideal curve of displacement or speed of the piston rods of the servo cylinders, is communicated with the sensors through a control line, and compares detection results of the sensors with the preset ideal curve of displacement or speed of the piston rods of the servo cylinders in the central controller so as to control operations of the plurality of hydraulic executing mechanisms. Therefore, through the hydraulic servo synchronous lifting device disclosed by the utility model, the problem that the synchronous lifting precision of a middle tank car is overlarge in the prior art is solved, thus requirements on a protection pouring production process are met.
Description
Technical field
The utility model relates to a kind of hydraulic servo synchronous lifting device, relates in particular to the servo synchronous lifting device of a kind of high-precision hydraulic.
Background technology
In the prior art, the up-down of nearly end form shaped blank conticaster intermediate tundish carriage realizes through platform of 4 Driven by Hydraulic Cylinder.Because the intermediate tundish carriage synchronous lifting device that prior art adopts can not be controlled the synchronization accuracy in the lifting process well; In addition, shaped blank crystallizer web thickness less (90mm is only arranged), and when cast protection mouth of a river external diameter be 50mm; Therefore; Existing synchronous lifting device causes mouth of a river run-off the straight in the decline process, when the bevelled mouth of a river gets into crystallizer, causes the mouth of a river to fracture easily because of running into crystallizer web inwall, causes the protection cast not carry out smoothly.
Therefore, the utility model provides a kind of servo synchronous lifting device of high-precision hydraulic that is used for intermediate tundish carriage, to solve the excessive problem of intermediate tundish carriage synchronization lifting precision in the prior art, protects the pouring production technique requirement thereby satisfy.
The utility model content
The utility model purpose is to provide a kind of high-precision hydraulic servo synchronous lifting device, the problem of intermediate tundish carriage up-down synchronization accuracy difference when protecting cast to solve the shaped blank conticaster, and then realize protection cast jacking system.
According to the purpose of the utility model, a kind of hydraulic servo synchronous lifting device is provided, comprising: a plurality of hydraulic actuators, each in said a plurality of hydraulic actuators comprises servo cylinder, servovalve; Hydraulic Station is connected with said a plurality of hydraulic actuators through hydraulic tubing, to form hydraulic circuit; Sensor is installed in respectively on each servo cylinder, is used to detect the displacement of the piston rod of corresponding servo cylinder; Central controller; Be connected with each sensor through control path; With with each sensor communication; And the displacement of the piston rod of preset servo cylinder or the ideal curve of speed, and with sensor to result and central controller in displacement or the ideal curve of speed of piston rod of preset servo cylinder compare, thereby control the operation of said a plurality of hydraulic actuators.
An end of the servo cylinder of each links to each other with lifting table in said a plurality of hydraulic actuator, and the other end links to each other with load-carrying element, and servovalve is installed on the servo cylinder.
Said lifting table is the tundish lifting table, and load-carrying element is the intermediate tundish carriage car body.
The intermediate tundish carriage car body is provided with a plurality of upright guide rails, with the dipping and heaving of guiding tundish lifting table.
In said a plurality of hydraulic actuator each also comprises hydraulic valve block, and zero leakage location Solenoid ball valve A and pressure compensator B are installed in hydraulic valve block.
Sensor is displacement pickup, speed sensor or flow sensor.
Central controller comprises PLC controller and servo-control unit; Servo-control unit has pressure and flux modification unit and curve maker; The curve maker produces displacement or the ideal curve of speed of the piston rod of said preset servo cylinder according to technological requirement, the PLC controller sends the ideal curve of said displacement or speed to central controller.
Through the servo synchronous lifting device of above-mentioned high-precision hydraulic, the utility model can improve shaped blank conticaster when cast protection intermediate tundish carriage synchronization lifting precision, guarantees to realize that the protection of shaped blank conticaster waters pouring functions.
Description of drawings
Through the description of embodiment being carried out below in conjunction with accompanying drawing, these of the utility model and/or other aspects will become clear and easy to understand more, in the accompanying drawings:
Fig. 1 is the front view according to the intermediate tundish carriage synchronous lifting device of the embodiment of the utility model;
Fig. 2 is the birds-eye view according to the intermediate tundish carriage synchronous lifting device of the embodiment of the utility model;
Fig. 3 is the explanatory view according to the hydraulic efficiency pressure system of the intermediate tundish carriage synchronous lifting device of the embodiment of the utility model;
Fig. 4 is the diagram of circuit according to the high-precise synchronization control method that is used for the intermediate tundish carriage synchronous lifting device of the embodiment of the utility model.
[main element label declaration]
1: the intermediate tundish carriage synchronous lifting device;
2: the intermediate tundish carriage car body;
3: the tundish lifting table;
4: blade fin;
12: hydraulic actuator;
13: Hydraulic Station;
14: displacement pickup;
15: central controller;
121: servo cylinder;
122: servovalve;
123: hydraulic valve block;
131: hydraulic tubing;
151: control path.
The specific embodiment
Now, will describe the embodiment of the utility model in detail with reference to accompanying drawing.In whole accompanying drawing, identical label is indicated components identical all the time.
Fig. 1 is the front view according to the intermediate tundish carriage synchronous lifting device of the embodiment of the utility model; Fig. 2 is the birds-eye view according to the intermediate tundish carriage synchronous lifting device of the embodiment of the utility model, and Fig. 3 is the explanatory view according to the hydraulic efficiency pressure system of the intermediate tundish carriage synchronous lifting device of the embodiment of the utility model.
As shown in Figure 1; Two ends according to the intermediate tundish carriage synchronous lifting device 1 of the embodiment of the utility model are connected respectively to intermediate tundish carriage car body 2 and tundish lifting table 3; Tundish lifting table 3 is connected with intermediate tundish carriage car body 2 through a plurality of blade fins 4 on the intermediate tundish carriage car body 2, thereby intermediate tundish carriage synchronous lifting device 1 can make tundish lifting table 3 go up and down reposefully.
, comprise to shown in Figure 3 like Fig. 1 according to the intermediate tundish carriage synchronous lifting device 1 of the embodiment of the utility model: a plurality of hydraulic actuators 12, each in said a plurality of hydraulic actuators 12 comprises servo cylinder 121, servovalve 122; Hydraulic Station 13 is connected with said a plurality of hydraulic actuators 12 through hydraulic tubing 131, and to form hydraulic circuit, servo cylinder 121, servovalve 122 receive from the power source (that is pressure oil) of Hydraulic Station 13 outputs; Sensor 14 is installed on the servo cylinder 121, is used to detect the displacement of the piston rod of servo cylinder 121; Central controller 15; Be connected with each sensor 14 through control path; To communicate by letter with each sensor 14; And the displacement of the piston rod of preset servo cylinder 121 or the ideal curve of speed, and the displacement of the piston rod of servo cylinders 121 preset in sensor 14 detected results and the central controller 15 or the ideal curve of speed compared, thereby control the operation of said a plurality of hydraulic actuator 12.
Wherein, Said ideal curve is according to the technological parameter requirement, and the running orbit curve of the servo cylinder of working out out in advance 121, this ideal curve can be velocity curve, displacement curve etc.; This ideal curve is an ideal value curve, is that the designer hopes the theoretical value that reaches for realizing a certain requirement.In the present embodiment; This ideal curve specifically is meant the desired displacement curve of 4 servo cylinders, 121 operations; Promptly require 4 servo cylinders 121 to move, and the at a point displacement parameter of each servo cylinder 121 and cooresponding ideal curve compare its deviation≤2mm along same desirable displacement curve.
As shown in Figure 1; An end of the servo cylinder 121 of each (for example in said a plurality of hydraulic actuator 12; The bottom) links to each other with tundish lifting table 3; The other end (for example, the top) links to each other with intermediate tundish carriage car body 2, realizes the up-and-down movement of tundish lifting table 3 with the motion of the piston rod through servo cylinder 121.Servovalve 122 is installed on the servo cylinder 121, is used to control the state of kinematic motion of the piston rod of servo cylinder 121.In addition, stable in order to ensure said a plurality of hydraulic actuators 12 also can be provided with hydraulic valve block 123 in each of said a plurality of hydraulic actuators 12.Preferably, zero leakage location Solenoid ball valve A can be installed in the hydraulic valve block 123, make the piston rod of servo cylinder 121 can more stably rest on the optional position with auxiliary servo valve 122.More preferably, also pressure compensator B can be set in hydraulic valve block 123, to guarantee that the oil pressure of each is constant in said a plurality of hydraulic actuator 12.
In addition; Central controller 15 comprises PLC controller and servo-control unit; Servo-control unit has pressure and flux modification unit and curve maker; The curve maker produces displacement or the ideal curve of speed of the piston rod of said preset servo cylinder 121 according to technological requirement, the PLC controller sends the ideal curve of said displacement or speed to central controller 15.
In the present embodiment, the quantity of said a plurality of hydraulic actuators 12 and said a plurality of blade fins 4 is 4, but is not limited thereto.Can the quantity and the position of hydraulic actuator be set according to the factors such as working ability of the shape of tundish lifting table and load, hydraulic actuator.
In addition, in the present embodiment, be used for detecting each the sensor 14 of state of kinematic motion of piston rod of servo cylinder 121 of said a plurality of hydraulic actuator 12 and be not limited to displacement pickup.Alternatively; But operating speed sensor or flow sensor replace displacement pickup 14; If operating speed sensor; The use traffic sensor then can speed sensor be installed in the position identical with displacement pickup 14, if then can be installed in flow sensor the inlet or the exit of servo cylinder 121.Correspondingly, the curve maker in the central controller 15 can be modified to corresponding with flow parameter.
To shown in Figure 3, each in said a plurality of hydraulic actuators 12 is connected respectively to central controller 15 and Hydraulic Station 13 through control path 151 and hydraulic tubing 131 with parallel mode like Fig. 1.
In addition, the pressure compensator B in said a plurality of hydraulic actuators 12 in the hydraulic valve block 123 of each play the constant voltage effect in said hydraulic circuit, with the sensitieness of the piston rod action of guaranteeing servo cylinder 121.Zero leakage location Solenoid ball valve A in the hydraulic valve block 123 can realize that the piston rod of servo cylinder 121 rests on the optional position for a long time.Specifically; Zero leakage location Solenoid ball valve A is in normally open when the piston rod movement of servo cylinder 121; Zero leakage location Solenoid ball valve A is in closed condition when the piston rod stop motion of servo cylinder 121; Play the pressurize effect, can be stabilized in a level attitude for a long time to realize tundish lifting table 3.
As shown in Figure 3; The pressure oil of Hydraulic Station 13 outputs directly arrives said a plurality of hydraulic actuator 12 through hydraulic tubing 131; Flow in said a plurality of hydraulic actuator 12 the pressure compensator B in each the hydraulic valve block 123; Zero leakage in servovalve 122, hydraulic valve block 123 location Solenoid ball valve A flows in the servo cylinder 121 then, and pressure oil makes the piston rod movement of servo cylinder 121, thereby realizes the up-down of tundish lifting table 3.In said a plurality of hydraulic actuators 12 in the operating process of each; Displacement pickup 14 detects the actual displacement of the piston rod of cooresponding servo cylinder 121 in real time; And detected actual displacement fed back to central controller 15; And then central controller 15 compares result and the said ideal curve that displacement pickup 14 detects, and with control servovalve 122, thereby keeps or the state of kinematic motion of the piston rod of change servo cylinder 121.
Be clear that from above description; In the lifting process of intermediate tundish carriage synchronous lifting device 1, control the synchronization lifting precision of the piston rod of all servo cylinders 121 through the servovalve 122 of each in central controller 15, displacement pickup 14, the said a plurality of hydraulic actuators 12.
The high-precise synchronization control method that is used for intermediate tundish carriage synchronous lifting device 1 according to the embodiment of the utility model is described with reference to the accompanying drawings.
Fig. 4 is the diagram of circuit according to the high-precise synchronization control method that is used for the intermediate tundish carriage synchronous lifting device of the embodiment of the utility model.
With reference to Fig. 4, in process of production, at first import technological requirement.As an example, according to technological requirement, when the displacement error between the piston rod of servo cylinder 121 any two in said a plurality of hydraulic actuators 12 during more than or equal to first error amount, system needs stop automatically immediately.The synchronous error that this technological requirement also can be set the piston rod of the servo cylinder 121 of each in said a plurality of hydraulic actuator 12 simultaneously is less than or equal to second error amount.
For example, in the present embodiment, first error amount can be 10mm, and second error amount can be 1mm.Yet first error amount and second error amount are not limited to above-mentioned numerical value, can set first error amount and second error amount according to the production needs.
In step 401; The servo-control unit of central controller 15 generates ideal curve according to technological requirement through displacement or velocity curve maker, in said a plurality of hydraulic actuators 12 piston rod of the servo cylinder 121 of each when motion all with said ideal curve as reference.
As an example, whether central controller 12 will follow said ideal curve kept or changed the piston rod of its servo cylinder 121 in the value in this moment existing speed according to the displacement that the piston rod of the servo cylinder 121 of each in said a plurality of hydraulic actuators 12 is carved at a time.
Next; Control flow advances to step 402; In step 402, the displacement pickup 14 of each detects the actual displacement of the piston rod of cooresponding servo cylinder 121 in said a plurality of hydraulic actuators 12, and detected actual displacement is fed back to central controller 15.
Next, control flow advances to step 403, and in step 403, central controller 15 compares the displacement of the piston rod of the servo cylinder 121 of each in said a plurality of hydraulic actuators 12 each other.If the displacement error >=10mm between the piston rod of any two servo cylinders 121 (first error amount); Then central controller 15 sends to said a plurality of hydraulic actuators 12 and ceases and desist order; Thereby make the piston rod stop motion of servo cylinder 121, finishing control flow process through servovalve 122; If the displacement error＜10mm between the piston rod of any two servo cylinders 121, then central controller is given an order to said a plurality of hydraulic actuators 12, makes the piston rod of servo cylinder 121 continue motion, and control flow advances to step 404.
In step 404; Central controller 15 is according to each servo cylinder 121, servovalve 122, the preassigned parameter of displacement pickup 14 in said a plurality of hydraulic actuators 12; With said ideal curve is tracking target, and displacement parameter value and the said ideal curve with the piston rod of the servo cylinder 121 of each in said a plurality of hydraulic actuators 12 compares at any time.
In step 404, if displacement that the piston rod of the servo cylinder 121 of each is carved at a time in said a plurality of hydraulic actuator 12 and the said ideal curve error≤1mm (second error amount) between the value in this moment, then control flow advances to step 405.
In step 405; The amplifier of central controller 15 servovalve 122 of each in said a plurality of hydraulic actuators 12 send keep existing speed order (promptly; Pass through the order of the existing speed of piston rod of the pressure of its servo-control unit and the maintenance servo cylinder 121 that the flux modification unit produces according to this condition of error≤1mm); To keep the current opening degree of servovalve 122; And then the displacement that keeps the piston rod of servo cylinder 121; And through the displacement pickup 14 of each in said a plurality of hydraulic actuators 12 Displacement Feedback of the piston rod of cooresponding servo cylinder 121 is returned central controller 15, thereby the piston rod of realizing the servo cylinder 121 of each in said a plurality of hydraulic actuator 12 is synchronized with the movement.
In addition; If in step 404, confirm displacement and the error＞1mm of said ideal curve between the value in this moment that the piston rod of the servo cylinder 121 of each in the one or more hydraulic actuators in said a plurality of hydraulic actuators 12 is carved at a time, then control flow advances to step 406.
In step 406; The amplifier of central controller 15 servovalve 122 of each in said one or more hydraulic actuators sends and is used to eliminate error with the order of following said ideal curve (promptly; The piston rod of the servo cylinder 121 of each has the order of speed now in the said one or more hydraulic actuators of change that produce according to the pressure of this condition of error＞1mm through its servo-control unit and flux modification unit); To change the current opening degree of servovalve 122; And then the speed of the piston rod of change servo cylinder 121; And the Displacement Feedback of the piston rod of cooresponding servo cylinder 121 is returned central controller 15 through the displacement pickup 14 of each in said one or more hydraulic actuators, that is, control flow is back to step 404.
In addition; In step 406; Also the hydraulic actuator except said one or more hydraulic actuators is (promptly in said a plurality of hydraulic actuators 12 simultaneously for central controller 15; In step 404, central controller 15 confirms that in its errors≤1mm) each send the order of the existing speed of piston rod that keeps its servo cylinder 121, thereby the piston rod of realizing the servo cylinder 121 of each in said a plurality of hydraulic actuator 12 is synchronized with the movement.
Next, control flow advances to step 407 from step 405.
In step 407; If the piston rod movement that central controller 15 detects servo cylinder 121 any in said a plurality of hydraulic actuator 12 through displacement pickup 14 is to the target location; Central controller 15 servovalve 122 of each in said a plurality of hydraulic actuators 12 is given an order, and Solenoid ball valve A makes the piston rod of servo cylinder 121 rest on this target location for a long time through the location of the zero leakage in the hydraulic valve block 123; If the piston rod of the servo cylinder 121 of each does not all move to predetermined displacement position in said a plurality of hydraulic actuator 12; Then control flow returns step 402; Repeat the step of above-mentioned detection-comparison-control command, central controller 15 continues the piston rod movement of control servo cylinder 121.
According to arts demand, ideal curve capable of using is controlled said a plurality of hydraulic actuator 12 and is promoted, keeps and/or reduction tundish lifting table 3.That is to say, the motion path of said a plurality of hydraulic actuator 12 can be set according to arts demand.
Can find out from above-mentioned control flow; The servovalve 122 of each, central controller 15, displacement pickup 14 form close loop control circuit through control path 151 in said a plurality of hydraulic actuator 12; This close loop control circuit can be satisfied the High Accuracy Control requirement of speed and displacement; Because the setting value of this close loop control circuit has adopted displacement or velocity curve maker; So this close loop control circuit can require to accomplish high-precision position control according to special process curve; That is, the servo cylinder 121 of each is controlled in said a plurality of hydraulic actuator 12 in this close loop control circuit simultaneously, thereby reaches the synchronous target of movement high-precision of the piston rod of servo cylinder 121.
In addition; Be clear that from above description; Displacement or velocity curve maker generated ideal curve that central controller 15 adopts in the servo-control unit; Rather than directly adopt servo cylinder 121 any in said a plurality of hydraulic actuator 12 perhaps only to realize that through the PLC controller piston rod of the servo cylinder 121 of each in said a plurality of hydraulic actuator 12 is synchronized with the movement as reference; Make the piston rod of the servo cylinder 121 of each in said a plurality of hydraulic actuator 12 simultaneously with reference to said ideal curve; So the servo cylinder 121 of each is equal on the motion status fully in said a plurality of hydraulic actuator 12, can obtain the higher precision that is synchronized with the movement like this.
The synchronous lifting device that is used for intermediate tundish carriage according to the embodiment of the utility model utilizes above-mentioned high-precise synchronization control method, controls a plurality of servo cylinders lifting table that goes up and down simultaneously, thereby satisfies high precision synchronous control requirement.In addition, though the utility model is that example has been described the utility model with the jacking system of nearly end form shaped blank conticaster intermediate tundish carriage, the utility model is not limited in this, but can be widely used in other technical field of hydraulic.
The utility model is not limited to the foregoing description, and those skilled in the art will be appreciated that and under the situation of principle that does not break away from the utility model that is defined by the claims and spirit, can change these embodiments.
Claims (7)
1. a hydraulic servo synchronous lifting device is characterized in that, comprising:
A plurality of hydraulic actuators, each in said a plurality of hydraulic actuators comprises servo cylinder, servovalve;
Hydraulic Station is connected with said a plurality of hydraulic actuators through hydraulic tubing, to form hydraulic circuit;
Sensor is installed in respectively on each servo cylinder, is used to detect the displacement of the piston rod of corresponding servo cylinder;
Central controller; Be connected with each sensor through control path; With with each sensor communication; And the displacement of the piston rod of preset servo cylinder or the ideal curve of speed, and with sensor to result and central controller in displacement or the ideal curve of speed of piston rod of preset servo cylinder compare, thereby control the operation of said a plurality of hydraulic actuators.
2. hydraulic servo synchronous lifting device according to claim 1 is characterized in that, an end of the servo cylinder of each links to each other with lifting table in said a plurality of hydraulic actuators, and the other end links to each other with load-carrying element, and servovalve is installed on the servo cylinder.
3. hydraulic servo synchronous lifting device according to claim 1 is characterized in that, said lifting table is the tundish lifting table, and load-carrying element is the intermediate tundish carriage car body.
4. hydraulic servo synchronous lifting device according to claim 3 is characterized in that the intermediate tundish carriage car body is provided with a plurality of upright guide rails, with the dipping and heaving of guiding tundish lifting table.
5. hydraulic servo synchronous lifting device according to claim 1 is characterized in that, each in said a plurality of hydraulic actuators also comprises hydraulic valve block, and zero leakage location Solenoid ball valve A and pressure compensator B are installed in hydraulic valve block.
6. hydraulic servo synchronous lifting device according to claim 1 is characterized in that, sensor is displacement pickup, speed sensor or flow sensor.
7. hydraulic servo synchronous lifting device according to claim 1; It is characterized in that; Central controller comprises PLC controller and servo-control unit; Servo-control unit has pressure and flux modification unit and curve maker, and the curve maker produces displacement or the ideal curve of speed of the piston rod of said preset servo cylinder according to technological requirement, and the PLC controller sends the ideal curve of said displacement or speed to central controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203452799U CN202296995U (en) | 2011-09-15 | 2011-09-15 | Hydraulic servo synchronous lifting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203452799U CN202296995U (en) | 2011-09-15 | 2011-09-15 | Hydraulic servo synchronous lifting device |
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| CN202296995U true CN202296995U (en) | 2012-07-04 |
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| CN2011203452799U Expired - Fee Related CN202296995U (en) | 2011-09-15 | 2011-09-15 | Hydraulic servo synchronous lifting device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328888A (en) * | 2011-09-15 | 2012-01-25 | 莱芜钢铁集团有限公司 | Hydraulic servo synchronous lifting device and control method thereof |
| CN104358725A (en) * | 2014-10-30 | 2015-02-18 | 大连华锐重工集团股份有限公司 | Synchronous cylinder control middle tank ascending and descending device |
| CN108394721A (en) * | 2018-05-02 | 2018-08-14 | 咸宁南玻节能玻璃有限公司 | A kind of glass production line stocker platform |
| CN109665462A (en) * | 2018-12-24 | 2019-04-23 | 北京铂阳顶荣光伏科技有限公司 | Supporting arrangement |
| CN116652475A (en) * | 2023-07-28 | 2023-08-29 | 南通泰胜蓝岛海洋工程有限公司 | Large-scale wind-powered electricity generation tubular pile two-way rotary system |
-
2011
- 2011-09-15 CN CN2011203452799U patent/CN202296995U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328888A (en) * | 2011-09-15 | 2012-01-25 | 莱芜钢铁集团有限公司 | Hydraulic servo synchronous lifting device and control method thereof |
| CN102328888B (en) * | 2011-09-15 | 2013-12-25 | 莱芜钢铁集团有限公司 | Hydraulic servo synchronous lifting device and control method thereof |
| CN104358725A (en) * | 2014-10-30 | 2015-02-18 | 大连华锐重工集团股份有限公司 | Synchronous cylinder control middle tank ascending and descending device |
| CN108394721A (en) * | 2018-05-02 | 2018-08-14 | 咸宁南玻节能玻璃有限公司 | A kind of glass production line stocker platform |
| CN109665462A (en) * | 2018-12-24 | 2019-04-23 | 北京铂阳顶荣光伏科技有限公司 | Supporting arrangement |
| CN116652475A (en) * | 2023-07-28 | 2023-08-29 | 南通泰胜蓝岛海洋工程有限公司 | Large-scale wind-powered electricity generation tubular pile two-way rotary system |
| CN116652475B (en) * | 2023-07-28 | 2023-10-31 | 南通泰胜蓝岛海洋工程有限公司 | Large-scale wind-powered electricity generation tubular pile two-way rotary system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20150915 |
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| EXPY | Termination of patent right or utility model |