KR101813095B1 - Semiautomatic ladle opening device using robot system - Google Patents

Semiautomatic ladle opening device using robot system Download PDF

Info

Publication number
KR101813095B1
KR101813095B1 KR1020150160875A KR20150160875A KR101813095B1 KR 101813095 B1 KR101813095 B1 KR 101813095B1 KR 1020150160875 A KR1020150160875 A KR 1020150160875A KR 20150160875 A KR20150160875 A KR 20150160875A KR 101813095 B1 KR101813095 B1 KR 101813095B1
Authority
KR
South Korea
Prior art keywords
jet lance
rotary arm
rod
cylinder
electric cylinder
Prior art date
Application number
KR1020150160875A
Other languages
Korean (ko)
Other versions
KR20170057577A (en
Inventor
조봉철
Original Assignee
신일인텍 주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 신일인텍 주식회사 filed Critical 신일인텍 주식회사
Priority to KR1020150160875A priority Critical patent/KR101813095B1/en
Publication of KR20170057577A publication Critical patent/KR20170057577A/en
Application granted granted Critical
Publication of KR101813095B1 publication Critical patent/KR101813095B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/44—Consumable closure means, i.e. closure means being used only once
    • B22D41/46—Refractory plugging masses
    • B22D41/465—Unplugging a vessel discharge port

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

In the present invention, a jet lance is automatically moved to a lower position of a set lace by a PLC control method using a plurality of electric cylinders and a robot joint, and an operator manually finely adjusts a jet lance And a ladle semi-automatic opening device using a robot system whose structure is improved so as to improve the work speed of the operator and improve the working efficiency by automatically returning the jet lance to the correct position after the opening operation .
The ladle semi-automatic opening device using the robot system according to the present invention comprises a main body rotatably operated in a tentative manner by the rotational force of a driving motor, a boom bar rotatably connected to the upper side of the main body, A rotary arm connected to an end of the rotary arm and connected to the jet lance and a first rod arranged to connect the main body and the boom band and being extended and operated as power is applied, A first electric cylinder having an electric cylinder and a second rod arranged to connect the swing arm and the rotary arm and being expanded and retracted as power is applied; and a second electric cylinder arranged to connect the rotary arm and the connector, A third electric cylinder having a third rod that is extended and retracted, Ear to a control unit for controlling the operation of said first, second and third electric cylinder and is composed of a control panel for manual operation with the operation of the first, second and third electric cylinder.

Description

TECHNICAL FIELD [0001] The present invention relates to a semi-automatic opening device for a ladle using a robot system,

The present invention relates to a ladle semi-automatic opening apparatus using a robot system, and more particularly, to an automatic ladle semi-automatic opening apparatus using a robot system, in which a plurality of electric cylinders and a boom arm are used, In addition, the present invention relates to a ladle semi-automatic opening apparatus using a robot system whose structure is improved so as to improve a working speed and an operation efficiency by automatically returning the jet lance to a predetermined position after the opening operation.

Generally, ladles are used for injecting molten steel from a steelmaking furnace into a tundish. A saw nozzle for injecting molten steel into the tundish and a cassette equipped with a collect nozzle are installed on the bottom of the ladle containing the molten steel And the collecting nozzle is fitted with a sliding nozzle inserted into the tundish.

The saw nozzle serves to inject the molten steel into the tundish through the nozzle hole therein. The saw nozzle protects the saw nozzle and the cassette plate from molten steel initially introduced into the ladle, The wheeler is inserted into the top nozzle hole.

Thereafter, after the sliding nozzle is installed on the collect nozzle of the ladle lower cassette, when the collect nozzle is aligned with the saw nozzle, the wheeler that has blocked the nozzle of the saw nozzle is poured, and the hole is opened and the molten steel is ejected through the sliding nozzle into the tundish will be.

However, since the wheeler layer directly contacting the molten steel in the ladle is hardened by high-temperature molten steel, even if the nozzle is opened as described above, molten steel may not be poured into the hardened wheeler layer.

In the case where the wheeler is hardened, work for opening the wheeler layer should be performed.

In the conventional case, when molten steel is placed in a ladle in a steel making process, the ladle sliding nozzle is opened after seating in a ladle turret, and when the ladle sliding nozzle is opened naturally, the molten steel is injected normally into the tundish.

However, when it is not possible to open the natural hole, the worker stands on the tundish, attaches the oxygen open pipe to the oxygen socket, connects it to the oxygen line, inserts it into the sliding nozzle and blows the high pressure oxygen manually.

However, at the time of opening work by the oxygen torch, the worker has to directly perform the work under the high-temperature molten steel ladle, so that the molten steel is scattered and flowed back frequently, resulting in frequent burn injury of the worker, There was a problem.

As a prior art for improving this, as disclosed in Korean Patent Registration No. 10-1442586 entitled " Semi-automatic open air of a molten steel outlet of a ladle "(registered on Apr. 19, 2014) A rotary assembly installed on the deck to rotate the rotary assembly; an elevating and lowering assembly installed on the rotary assembly and upwardly and downwardly guided along the guide rail; A link means for rotating the link and the auxiliary link about the hinge axis and a torch assembly connected to the link means for opening the molten steel outlet port of the ladle in a horizontal state in accordance with the operation of the link means, The assembly being connected to the link means, the torch device being forward and backward while maintaining a horizontal state according to the tilting of the link means, An oxygen torch pipe coupled to the torch device for opening the molten steel outlet of the ladle and a tension device connected to the oxygen torch pipe inside the torch device to allow the oxygen torch pipe to be tensioned, A tension spring that is connected to the torch pipe to elastically deform the oxygen torch pipe; an angle sensor that is provided at the lower end of the oxygen torch pipe to sense tilting of the oxygen torch pipe; And a controller capable of controlling the motor operation of the open air according to the detection signal of the detection sensor.

Another prior art related to the conventional ladle open air is disclosed in Korean Patent Registration No. 10-0798072, entitled " Ladle Automatic Opening Device "(registered on January 18, 2008) Down cylinder which is installed between the pair of main frames and is equipped with a manipulator arm for performing an opening operation by fixing an oxygen pore pipe at an end thereof, A down sensor installed at a front side of the fixing base to detect a fall of the up-down cylinder, an up-down device mounted on the up-down cylinder for lifting up and down the cylinder along a pair of main frames, And an operation panel for controlling the operation panel.

Conventionally, the structure of the moving means for guiding the open air of the jet lance or the like to the correct position on the lower side of the ladle has been complicated in the ladle openings of the ladle openings, and the open air is moved manually There is a disadvantage in that a precise work skill is required to move it.

Korean Registered Patent Publication No. 10-1442586 entitled "Semi-automatic open air of the molten steel outlet of the ladle" (Registration date: 2014.09.15) Korean Registered Patent Publication No. 10-0798072 entitled "ladle automatic opening device" (registered on January 18, 2008)

The object of the present invention is to provide a method and apparatus for automatically moving a jet lance to a lower position of a set lace by a PLC control method using a plurality of electric cylinders and robot joints, The operator manually moves the jet lance to fine adjustment by using the operation unit to open the jet lance, and the jet lance is automatically returned to the correct position after the jetting operation, thereby improving the work speed of the operator and improving the work efficiency The present invention relates to a ladle semi-automatic opening device using a robot system having an improved structure.

Another object of the present invention is to provide a ladle semi-automatic opening device using a robot system whose structure is improved so as to prevent collision with a ladle or peripheral equipment due to erroneous operation during fine adjustment of a jet lance .

According to an aspect of the present invention, there is provided an elevator system comprising a main body rotatably driven by a driving motor, a boom bar rotatably connected to an upper side of the main body, a rotary arm rotatably connected to an end of the boom bar, A first electric cylinder having a connection port rotatably connected to an end portion of the rotary arm and coupled to the jet lance and having a first rod arranged to connect the main body and the boom frame and being expanded and contracted when power is applied, A second rod arranged to connect the rotary arm and having a second rod that is extended and retracted when power is applied, and a third rod arranged to connect the rotary arm and the connector, And a control unit for controlling the operation of the first, second, and third electric cylinders so as to move the jet lance to the set position or to return the jet lance to the home position. It characterized by comprising an operation for the manual control and the operation of the first, second and third electric cylinder for controlling the control panel.

The first electric cylinder has left and right first cylinder bodies pivotably connected to the left and right upper portions of the main body respectively. The first and second electric cylinders are provided at the left and right ends of the left and right first cylinder bodies, And a left and a right first rod connected to each other.

The second electric cylinder includes a second cylinder body rotatably connected to an intermediate portion of the boom frame, a second rod body provided so as to protrude / retract from the second cylinder body and to be connected to one end of the rotary arm by a pin, .

A third cylinder body rotatably connected to an intermediate portion of the rotary arm, a third cylinder body provided so as to protrude / retract from the third cylinder body, and an end portion connected to one end of the connecting rod by a pin, .

And a buffering means disposed inside the connection port for buffering an impact transmitted to the jet lance and restoring the shock to a position before impact, wherein the buffer means includes a support bearing member for rotatably supporting an end portion of the jet lance, A plurality of spring members having one end symmetrically connected to the outer circumference of the jet lance in at least four directions and the other end connected to the connecting port.

In the present invention, the jet lance is automatically moved to the lower position of the set lanes by the PLC control method using the first, second and third electric cylinders and the robot joint motion, and the operator manually moves By moving the jet lance to the fine adjustment and automatically returning the jet lance to the correct position after the opening work, the work speed of the worker is improved and the laying operation of the ladle is performed without requiring higher work skill So that it is possible to improve the working efficiency.

 Further, the present invention is characterized in that, when one end of the jet lance hits against the ladle or other equipment during manual operation of the operator using the operation unit, the jet lance is rotated about the support bearing member and connected to the periphery of the jet lance in all directions The spring member is restored to its original position so that the bent end of the jet lance is directed toward the molten steel outlet side by the restoring elastic force of the spring member, thereby buffering impact transmitted to the jet lance side to prevent breakage.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a ladle semi-automatic opening apparatus using a robot system according to the present invention;
Fig. 2 is a perspective view showing the openable structure of the present invention from another angle; Fig.
FIGS. 3A to 3F are explanatory diagrams showing the state of use of the first, second, and third electric power cylinder ladder according to the present invention, sequentially illustrating the openings.
FIGS. 4A to 4F sequentially illustrate operations of returning the jet lance of the present invention to the original position. FIG.
5 is a cross-sectional view schematically showing the buffer means of the present invention.

1 to 5, a ladle semi-automatic opening device using a robot system according to the present invention comprises a main body 100 which is rotated in a tentative manner by the rotational force of a driving motor 210, A rotary arm 400 rotatably connected to an end of the boom frame 300 and a rotary arm 400 rotatably connected to an end of the rotary arm 400, A first rod 615A and a second rod 615B arranged to connect the main body 100 and the boom frame 300 and being expanded and contracted when power is applied, And a second rod 625 which is arranged to connect the boom bar 300 and the rotary arm 400 and is extended and operated as the power is supplied, 620) arranged to connect the rotary arm (400) and the connector (500) A third transmission cylinder 630 having a third rod 635 that is operated to be expanded and retracted in response to the rotation of the jet lance 600, A control unit 800 for controlling the operation of the first, second and third electric cylinders 610A, 610B, 620 and 630, and an operation unit 900 for manually operating the operations of the first, second and third electric cylinders 610A, 610B, 620 and 630.

1 and 2, the main body 100 has a structure in which the main body 100 is rotated so as to be engaged with gears of the driving motor 210 and rotated by the rotational force of the driving motor 210.

One end (lower end) of the boom frame 300 is rotatably connected to the support brackets 110 on both the left and right sides protruding from the upper side of the main body 100 via the first connection shaft 122, Is connected to the rotary arm (400) at a position close to one end thereof via a second connection shaft (124).

The rotary arm 400 has a structure in which one end of the rotary arm 400 is rotated about the second connection shaft 124 in a seesaw motion manner during the operation of the second rod 625 of the second electric motor 620.

In addition, the rotary arm 400 is axially coupled to a third connecting shaft 126 at a position near the one end of the connector 500 so as to support the rotation of the connector 500.

The first electric cylinders 610A and 610B include left and right first cylinder bodies 612A and 612B that are rotatably and pin-connected to left and right upper portions of the main body 100, And first left and right first rods 615A and 615B connected to the left and right sides of the middle part of the boom bar 300 and protruding and retracted from the ends of the bodies 612A and 612B.

The left and right first cylinder bodies 612A and 612B are rotatably connected to the support bracket 110 by pins and are provided with left and right first rods 615A and 615B provided on the left and right first cylinder bodies 612A and 612B, 615B are operated to project outward from the left and right first cylinder bodies 612A, 612B as power is applied to the first electric cylinders 610A, 610B to rotate the boom frame 300 to rotate the jet lances 600 Up and down operations.

The second electric cylinder 620 includes a second cylinder body 622 rotatably connected to an intermediate portion of the boom frame 300 and a second cylinder body 622 provided so as to be capable of projecting and retracting from the second cylinder body 622, And a second rod 625 connected to one end of the rotary arm 400 by a pin.

The second cylinder body 622 is connected to a first connection bracket 310 protruded on one side at an intermediate portion of the boom frame 300 and the second rod 625 is connected to the outside of the second cylinder body 622 The rotary arm 400 rotates about the second connection shaft 124 to perform the forward and backward movement of the jet lance 600. [

The third electric cylinder 630 includes a third cylinder body 632 rotatably connected to an intermediate portion of the rotary arm 400 and a third cylinder body 632 provided to be capable of protruding and retracting from the third cylinder body 632, And a third rod 635 connected to one end of the connector 500 by a pin.

The third cylinder body 632 is connected to a second connection bracket 410 protruding from one side of the rotary arm 400 and the third rod 635 is connected to the outside of the third cylinder body 632 The connection port 500 is rotated about the third connection shaft 126 to maintain the horizontal balance of the jet lance 600. [

As shown in FIG. 5, the present invention further includes a buffering means 700 disposed inside the connector 500 to buffer the impact transmitted to the jet lance 600 and restore the impact to a pre-impact position, do.

The buffer means 700 includes a support bearing member 710 for rotatably supporting an end of the jet lance 600 and a support bearing member 710 connected to the outer periphery of the jet lance 600 in all directions to provide an elastic restoring force And a plurality of spring members 720.

That is, when the one end of the jet lance 600 hits the ladle 10 or other equipment during the manual operation of the operator using the operation unit 900, the buffering means 700 may cause the jet lance 600 to move The jet lance 600 is rotated about the outer periphery of the jet lance 600 and the other end is connected symmetrically in at least four directions around the outer periphery of the jet lance 600 and the other end is connected to the connecting port 500 The restoring elastic force of the plurality of spring members 720 causes the bent end of the jet lance 600 to return to the original position (position before impact) so as to be directed toward the molten steel outlet side of the ladle 10. [

When the ladle 10 is placed on the bottom surface at a position close to the opening device, the control unit 800 controls the driving motor 210 and the first, And controls the operation of the cylinders 610A, 610B, 620, and 630, respectively, to automatically move the jet lance 600 to the set position.

3A, the drive motor 210 is driven by a control signal of the controller 800, and the main body 100 is rotated in a turntable manner in a state where the boom stand 300 is erected on the basis of the main body 100, .

The first electric cylinders 610A and 610B are disposed so as to connect the left and right sides of the support bracket 110 and the left and right sides of the boom frame 300. Therefore, The right first rod 615A and the right first rod 615B are contracted to pull the intermediate portion of the boom frame 300 as shown in FIG. 3B so that the boom frame 300 is rotated about the first connection axis 122 Thereby causing the jet lance 600 to be positioned below the ladle 10. [

3C, when the third rod 635 is extended by the operation of the third electric cylinder 630, the connecting rod 500 and the jet lance 600 are rotated around the third connecting rod 126 So that the connector 500 is maintained in the same horizontal state as the lower side of the ladle 10. [

Then, as shown in FIG. 3D, the first power transmission cylinder 610A and 610B are operated to shrink the left and right first rods 615A and 615B, So that the connector 500 and the jet lance 600, which are maintained in a horizontal state, are positioned below the ladle 10. In this case,

3E, the second rod 625 is rotated by operating the second electric cylinder 620 to rotate the rotary arm 400 about the second connection shaft 124, So that the end of the lance 600 is positioned below the molten steel outlet provided on the lower side of the ladle 10.

The operation of moving the jet lance 600 to the lower set position of the molten steel outlet is controlled by controlling the operation of the first, second and third electric cylinders 610A, 610B, 620 and 630 by the PLC control using the control unit 800 It can be moved automatically to the set position.

Next, the operation of the first and second electric cylinders is manually performed by the operator using the operation unit 900, and the air is introduced into the molten steel outlet using the jet lance 600 while performing the air-boring operation using the oxygen injection.

At this time, as shown in FIG. 3F, the operator drives the second electric motor 620 to retract the second rod 625 and rotate the rotary arm 400 in the clockwise direction about the second connecting shaft 124 The boom table 300 is rotated in the clockwise direction around the first connecting shaft 122 while the first electric cylinders 610A and 610B are driven to extend the first rods 615A and 615B, The end of the jet lance 600 is advanced to the side of the molten steel outlet by advancing and raising the connection port 500 for fixing the nozzle 600.

Although the operations of the first, second and third electric cylinders 610A, 610B, 620 and 630 are separately described in the above-described operation, the operation of the first, second and third electric cylinders 610A, 610B, The jetting lances 600 and the connection ports 500 are connected to each other for movement.

When the ladle 10 is opened by using the jet lance 600 and the molten steel is introduced into the ladle 10, the operator operates the operation unit 900 again to finely adjust the jet lance 600, The operation of the first, second, and third electric cylinders 610A, 610B, 620, and 630 is controlled by the control signal of the controller 800 so that the jet lance 600 is automatically controlled to the original state before the operation Return to the position.

4A to 4F, the contraction and extension operations of the first, second, and third rods are operated in reverse to the previously described opening operation.

4A, to separate the jet lances 600 that have entered the molten steel outlet of the ladle 10 from the ladle 10 side, as shown in FIG. 4B, the first and second electric cylinders 610A and 610B The left and right first rods 615A and 615B are contracted to rotate the boom frame 300 about the first connection shaft 122 in the direction opposite to the clockwise direction of travel, The second rod 625 of the second electric cylinder 620 is extended to rotate the rotary arm 400 about the second connection shaft 124 as shown in FIG. The connector 500 and the jet lance 600 are moved backward.

4D, the left and right first rods 615A and 615B of the first electric cylinders 610A and 610B are extended to rotate the boom frame 300 about the first connecting shaft 122, The second rod 625 of the second transmission cylinder 620 is extended so that the rotary arm 400 and the boom frame 300 are folded together so that the rotary arm 400 is rotated in the opposite direction And the left and right first rods 615A and 615B of the first transmission cylinders 610A and 610B are extended to return the boom frame 300 to the body 100 as shown in FIG.

In the present invention as described above, the jet lances are automatically moved to the lower positions of the set lanes by the PLC control method using the first, second and third electric cylinders and the robot joint motion, The jet lance is manually moved to the fine adjustment and the jet lance is automatically returned to the correct position after the jetting operation. Thus, the work speed of the operator is improved, Thereby making it possible to improve the working efficiency.

 The present invention can also be applied to a case where the jet lance 600 moves the support bearing member 710 from the center to the center when the end of the jet lance 600 hits the ladle 10 or other equipment during manual operation of the operator using the operation unit 900. [ And the spring member 720 connected to the outer periphery of the jet lance 600 by the restoring elastic force of the spring member 720 rotates to the original position of the jet lance 600 so as to face the bent end of the jet lance 600 toward the molten steel outlet side of the ladle 10. [ So that the shock transmitted to the jet lance 600 is buffered to prevent damage.

10: ladle 100: body
110: support bracket 122: first connection shaft
124: second connection shaft 126: third connection shaft
210: drive motor 300: boom
310: first connection bracket 400: rotary arm
410: second connection bracket 500: connection
600: jet lance 610A, 610B: first electric cylinder
615A, 615B: first rod 620: second electric cylinder
625: second rod 630: third electric cylinder
635: third load 700: buffer means
710: Support bearing member 720: Spring member
800: control unit 900:

Claims (5)

A main body 100 rotatably operated by the rotational force of the driving motor 210;
A boom bar 300 rotatably connected to the upper side of the main body 100;
A rotary arm 400 rotatably connected to an end of the boom frame 300;
A coupling 500 rotatably connected to an end of the rotary arm 400 and coupled to the jet lance 600;
First power cylinders 610A and 610B having first rods 615A and 615B arranged to connect the main body 100 and the boom bar 300 and expanded and contracted when power is applied;
A second electric cylinder 620 having a second rod 625 arranged to connect the swing arm 300 and the rotary arm 400 and being expanded and retracted as power is applied;
A third electric cylinder 630 having a third rod 635 arranged to connect the rotary arm 400 and the connector 500 and being expanded and retracted as power is applied;
A control unit 800 for controlling the operation of the first, second and third electric cylinders 610A, 610B, 620 and 630 so as to move the jet lance 600 to a predetermined position or return to the home position;
An operation unit 900 for manually operating the first, second, and third electric cylinders 610A, 610B, 620, and 630; And
And a buffering means (700) disposed inside the connector (500) for buffering an impact transmitted to the jet lance (600) and restoring the shock to a position before impact,
The buffering means 700 includes a support bearing member 710 for rotatably supporting an end portion of the jet lance 600 and a support bearing member 710 having one end symmetrically connected to the outer circumference of the jet lance 600 in at least four directions And a plurality of spring members (720) connected at the other end to the connector (500). The method according to claim 1,
The first electric cylinders 610A and 610B include left and right first cylinder bodies 612A and 612B which are rotatably connected to the left and right upper portions of the main body 100,
And a left and a right first rod 615A and 615B connected to the left and right sides of the boom bar 300. The first and second rods 615A and 615B protrude from the ends of the left and right first cylinder bodies 612A and 612B, Semi - automatic opening device of ladle used. The method according to claim 1,
The second electric cylinder 620 includes a second cylinder body 622 rotatably connected to an intermediate portion of the boom frame 300,
And a second rod (625) provided so as to protrude / retract from the second cylinder body (622) and whose ends are connected to one end of the rotary arm (400) by a pin. . The method according to claim 1,
The third electric cylinder 630 includes a third cylinder body 632 rotatably connected to an intermediate portion of the rotary arm 400,
And a third rod (635) provided so as to protrude / retract from the third cylinder body (632) and have an end connected to one end of the connector (500) by a pin connection. delete
KR1020150160875A 2015-11-17 2015-11-17 Semiautomatic ladle opening device using robot system KR101813095B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150160875A KR101813095B1 (en) 2015-11-17 2015-11-17 Semiautomatic ladle opening device using robot system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150160875A KR101813095B1 (en) 2015-11-17 2015-11-17 Semiautomatic ladle opening device using robot system

Publications (2)

Publication Number Publication Date
KR20170057577A KR20170057577A (en) 2017-05-25
KR101813095B1 true KR101813095B1 (en) 2017-12-29

Family

ID=59050822

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150160875A KR101813095B1 (en) 2015-11-17 2015-11-17 Semiautomatic ladle opening device using robot system

Country Status (1)

Country Link
KR (1) KR101813095B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114669735B (en) * 2022-03-31 2024-02-06 广东韶钢松山股份有限公司 Water gap dredging method and water gap dredging device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100335363B1 (en) * 1996-04-30 2002-10-12 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Excavator control equipment
KR101442586B1 (en) * 2014-04-11 2014-09-22 포스마텍 주식회사 Semi auto hole opener for ladle molten outlet

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100335363B1 (en) * 1996-04-30 2002-10-12 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Excavator control equipment
KR101442586B1 (en) * 2014-04-11 2014-09-22 포스마텍 주식회사 Semi auto hole opener for ladle molten outlet

Also Published As

Publication number Publication date
KR20170057577A (en) 2017-05-25

Similar Documents

Publication Publication Date Title
WO2008033831A3 (en) Tong positioning and alignment device
AU5653600A (en) Retractable counterweight for straight-boom aerial work platform
CN105331373A (en) Split type rotating lifting gear for repairing of oven door of coke oven and use method of split type rotating lifting gear
US4553743A (en) Elevated device for placing slag retention means in tapping converters
KR101813095B1 (en) Semiautomatic ladle opening device using robot system
JP6481976B2 (en) Pile driving device
CA1209968A (en) Manipulator transporter
CN212563132U (en) Catwalk provided with pulley
JP4027488B2 (en) Drill jumbo boom lifting device
CN211228498U (en) Impact drilling pile driver
WO2018186171A1 (en) Device for cutting structure and method for cutting structure
JPS6135244B2 (en)
KR100851876B1 (en) Device for inserting top lance in ladle
CN113579167A (en) Sand core combination method based on laser scanning
CN111894493A (en) Catwalk provided with pulley
JP6735256B2 (en) Mounting table device for construction machine work machine
KR100798072B1 (en) Apparatus for opening ladle
CN219944953U (en) Angle-adjustable laser etching equipment
JP6575276B2 (en) jig
CN204893151U (en) Flame cutting machine burning torch guide arm adjusting device
CN219262289U (en) Sliding type manipulator and drilling machine
JP2012225009A (en) Ground improvement device and leader rising/falling method
KR101757562B1 (en) Repairing apparatus for furnace wall
JPS6338517B2 (en)
JPH0551619A (en) Powder blowing device and positioning method thereof

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant