CN214422118U - Automatic casting trolley - Google Patents
Automatic casting trolley Download PDFInfo
- Publication number
- CN214422118U CN214422118U CN202120571957.7U CN202120571957U CN214422118U CN 214422118 U CN214422118 U CN 214422118U CN 202120571957 U CN202120571957 U CN 202120571957U CN 214422118 U CN214422118 U CN 214422118U
- Authority
- CN
- China
- Prior art keywords
- trolley
- lifting
- hoisting
- main
- auxiliary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
The utility model discloses an automatic casting trolley, which comprises a trolley frame arranged on a truss, a main hoisting mechanism, an auxiliary hoisting mechanism, a traveling mechanism and a lifting appliance, wherein the main hoisting mechanism, the auxiliary hoisting mechanism and the traveling mechanism are positioned on the trolley frame; the main hoisting mechanism and the auxiliary hoisting mechanism realize the lifting of the lifting appliance; the travelling mechanism realizes the integral translation of the trolley frame. The utility model provides an automatic casting trolley comprising a walking mechanism and a lifting mechanism, which reduces the manual participation, avoids accidents and improves the production efficiency by controlling and coordinating the translation of the casting trolley and moving a steel ladle to a casting position through a PLC controller; the device has compact integral structure, safety and reliability; the change of the molten steel quality can be monitored in real time, and the pouring process can be accurately controlled.
Description
Technical Field
The utility model belongs to the technical field of metallurgical pouring, especially, relate to automatic casting dolly.
Background
In the pouring procedure of metallurgical smelting, molten steel is poured into a casting ladle, and then the molten steel is poured into a centrifugal casting machine from the casting ladle, because the molten steel amount in a smelting furnace is changed, the heights of the casting ladle are different, and the centrifugal casting machine has a certain height, so that workers need to obliquely pour the centrifugal casting machine; the temperature of the molten iron is above 1400 ℃, the weight of the molten iron is generally above 1 ton, great difficulty is brought to the transfer of the molten iron and the operation of each process, the transfer of the electric furnace or the ladle is controlled manually, the manual quantity required in the operation process is large, labor is consumed, and great potential safety hazards are caused.
SUMMERY OF THE UTILITY MODEL
For the inconvenience of solving among the prior art steel ladle from smelting furnace to casting machine transportation to and realize that the molten iron topples over the accurate control of in-process weight, the utility model provides an automatic casting dolly not only can realize the automatic movement who drives the steel ladle, can also realize molten steel automatic casting and weight monitor function, the technical scheme of the utility model as follows:
the automatic casting trolley comprises a trolley frame arranged on the truss, a main hoisting mechanism, an auxiliary hoisting mechanism, a traveling mechanism and a lifting appliance, wherein the main hoisting mechanism, the auxiliary hoisting mechanism and the traveling mechanism are positioned on the trolley frame;
the main hoisting mechanism and the auxiliary hoisting mechanism realize the lifting of the lifting appliance; the travelling mechanism realizes the integral translation of the trolley frame;
the main hoisting mechanism comprises a main hoisting motor, a main hoisting speed reducer and a main hoisting winding drum, which are erected on a trolley frame, an output shaft of the main hoisting motor is connected to the main hoisting speed reducer, an output shaft of the main hoisting speed reducer is connected to the main hoisting winding drum, and a brake is arranged between the main hoisting motor and the main hoisting speed reducer;
a fixed pulley is fixedly arranged on the side of the main hoisting drum through a support, and a traction rope output by the main hoisting drum is connected with a lower lifting appliance through the fixed pulley.
As the requirement of the molten steel pouring process is fast and error-free, in order to improve the safety and reliability of the main hoisting mechanisms, a pair of main hoisting mechanisms are symmetrically arranged on the trolley frame, main hoisting motors, main hoisting speed reducers and main hoisting drums of the two main hoisting mechanisms are respectively and symmetrically arranged, and the two main hoisting speed reducers are connected by adopting a coupling, so that the time delay or the halt of the pouring process caused by the fault of a single main hoisting mechanism is avoided. When one group of main hoisting mechanisms breaks down, the power supply of the main hoisting motor is cut off, and the lifting appliance is driven to continue lifting under the driving of the other normally operated main hoisting mechanism. The main hoisting motor drives the main hoisting drum to rotate positively and negatively, and the traction rope on the main hoisting drum stretches and retracts to drive the lifting appliance connected below to lift.
The auxiliary hoisting mechanism comprises an auxiliary hoisting motor, an auxiliary hoisting speed reducer and an auxiliary hoisting winding drum which are erected on a trolley frame, wherein an output shaft of the auxiliary hoisting motor is connected to the auxiliary hoisting speed reducer, an output shaft of the auxiliary hoisting speed reducer is connected to the auxiliary hoisting winding drum, and a brake is arranged between the auxiliary hoisting motor and the auxiliary hoisting speed reducer. The auxiliary hoisting motor drives the auxiliary hoisting drum to rotate positively and negatively, and the traction rope on the auxiliary hoisting drum stretches and retracts to drive the lifting appliance connected below to lift.
In order to control the extension and retraction amount of traction ropes of a main hoisting mechanism and an auxiliary hoisting mechanism and control the lifting height of a lifting appliance, a hoisting encoder and a hoisting limiter are arranged on a central shaft of each main hoisting drum of the main hoisting mechanism, and the hoisting encoder corresponds to the lifting height of the lifting appliance by recording the number of rotation turns of the main hoisting drum; and a lifting limiter arranged on the main lifting mechanism is self-locked after the traction rope is released for a certain length, so that the main lifting motor is prevented from continuously rotating.
And one end of a central shaft of an auxiliary lifting winding drum of the auxiliary lifting mechanism is provided with a lifting encoder, and the other end of the central shaft is provided with a lifting limiter.
In this embodiment, the lifting limiter is specifically a lifting height limiter.
And a cable reel is fixedly arranged between the main hoisting mechanism and the auxiliary hoisting mechanism and on the frame of the trolley and respectively supplies power to the main hoisting mechanism, the auxiliary hoisting mechanism and the travelling mechanism through cables.
The walking mechanism comprises a walking motor, a walking speed reducer, walking wheels and a guide mechanism, wherein the walking motor, the walking speed reducer, the walking wheels and the guide mechanism are fixed on a trolley frame, an output shaft of the walking motor is connected to the walking wheels through the walking speed reducer, the walking wheels move horizontally along a truss, the guide mechanism is four pairs of guide units arranged on four corners of the trolley frame and along the truss, each guide unit comprises a guide frame welded on the trolley frame and a roller transversely arranged on the guide frame, the rollers are fixed on the guide frame through a center shaft and a bearing, the trolley frame is limited on the truss, and derailment is avoided.
Furthermore, the automatic casting trolley further comprises a PLC controller, wherein the PLC controller is respectively connected with the lifting limiter, the lifting encoder, the main lifting motor, the auxiliary lifting motor and the walking motor, receives signals of the lifting limiter and the lifting encoder, and controls the main lifting motor, the auxiliary lifting motor and the walking motor to operate.
The lifting appliance comprises a main hook and an auxiliary hook, and the top end of the main hook is connected with a traction rope of the main lifting mechanism through a group of movable pulleys; and the auxiliary hook is connected with a traction rope of the auxiliary hoisting mechanism.
Furthermore, in order to more accurately detect the quality of molten steel in the steel ladle, the trolley frame comprises a trolley chassis in contact with the truss and a trolley body above the trolley chassis, the main hoisting mechanism and the auxiliary hoisting mechanism are arranged on the trolley body, the travelling mechanism is arranged on the trolley chassis, the trolley chassis is connected with the trolley body through a connecting rod, and two ends of the connecting rod are respectively connected to the trolley chassis and the trolley body through hinged seats; a weighing sensor is arranged between the trolley chassis and the trolley body, the change of the molten steel mass in the molten steel ladle is obtained through the change of the weight above the weighing trolley chassis, and the real-time and accurate detection of the molten steel mass is realized.
The PLC is connected with a weighing sensor arranged between the trolley chassis and the trolley body and used for receiving weight information transmitted by the weighing sensor.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model provides an automatic casting trolley comprising a walking mechanism and a lifting mechanism, which reduces the manual participation, avoids accidents and improves the production efficiency by controlling and coordinating the translation of the casting trolley and moving a steel ladle to a casting position through a PLC controller;
2. the device structure comprises two sets of main hoisting mechanisms which are symmetrically arranged through the coupling, so that the device is compact in overall structure, safe and reliable;
3. the change of the molten steel quality is monitored in real time through a weighing sensor between a chassis and a vehicle body on the trolley, and the pouring process is accurately controlled.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic top view of an automatic casting cart according to the present invention;
fig. 2 is a side view schematic structural diagram of the automatic casting trolley provided by the utility model.
Wherein, 1-trolley frame, 2-main hoisting mechanism, 3-auxiliary hoisting mechanism, 4-travelling mechanism, 5-sling, 6-brake, 7-hoisting encoder, 8-hoisting limiter, 9-truss, 10-ladle;
11-a trolley chassis, 12-a trolley body, 13-a connecting rod and 14-a weighing sensor;
21-a main lifting motor, 22-a main lifting speed reducer, 23-a main lifting winding drum, 24-a fixed pulley, 25-a coupler and 26-a cable bobbin;
31-an auxiliary hoisting motor and 32-an auxiliary hoisting speed reducer;
41-a walking motor, 42-a walking reducer, 43-a walking wheel and 44-a guiding mechanism;
51-main hook, 52-auxiliary hook, 53-movable pulley, 101-hanging rod and 102-hanging ring;
441-guide frame, 442-roller.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
An automatic casting trolley, as shown in fig. 1, comprises a trolley frame 1 arranged on a truss, a main hoisting mechanism 2, an auxiliary hoisting mechanism 3 and a traveling mechanism 4 which are arranged on the trolley frame 1, a lifting appliance 5, a brake 6, a lifting encoder 7 and a lifting limiter 8;
the main hoisting mechanism 2 comprises a main hoisting motor 21, a main hoisting speed reducer 22 and a main hoisting reel 23 which are erected on the trolley frame 1, an output shaft of the main hoisting motor 21 is connected to the main hoisting speed reducer 22, an output shaft of the main hoisting speed reducer 22 is connected to the main hoisting reel 23, and a brake 6 is arranged between the main hoisting motor 21 and the main hoisting speed reducer 22;
a fixed pulley 24 is fixedly arranged on the side of the main hoisting drum 23 through a support, and an output traction rope is connected with a lower lifting appliance through the fixed pulley 24.
As the requirement of the molten steel pouring process is fast and error-free, in order to improve the safety and reliability of the main hoisting mechanisms, a pair of main hoisting mechanisms 2 are symmetrically arranged on the trolley frame 1, main hoisting motors, main hoisting speed reducers and main hoisting drums of the two main hoisting mechanisms 2 are respectively and symmetrically arranged, and the two main hoisting speed reducers are connected by a coupler 25, so that the delay or halt of the pouring process caused by the fault of a single main hoisting mechanism is avoided.
The auxiliary hoisting mechanism 3 comprises an auxiliary hoisting motor 31, an auxiliary hoisting speed reducer 32 and an auxiliary hoisting reel 33 which are erected on the trolley frame 1, wherein an output shaft of the auxiliary hoisting motor 31 is connected to the auxiliary hoisting speed reducer 32, an output shaft of the auxiliary hoisting speed reducer 32 is connected to the auxiliary hoisting reel 33, and a brake 6 is arranged between the auxiliary hoisting motor 31 and the auxiliary hoisting speed reducer 32. The auxiliary hoisting motor 31 drives the auxiliary hoisting drum 33 to rotate positively and negatively, and the traction rope on the auxiliary hoisting drum 33 stretches to drive the lifting appliance connected below to lift.
In order to control the extension and contraction quantity of the traction ropes of the main hoisting mechanism 2 and the auxiliary hoisting mechanism 3 and control the lifting height of the lifting appliance, a lifting encoder 27 is arranged at the end part of a central shaft of a main hoisting drum of the main hoisting mechanism, and the lifting height of the lifting appliance is corresponding to the rotation number of the main hoisting drum by recording; and a lifting limiter 8 is arranged at the end part of the central shaft of the other main lifting winding drum of the main lifting mechanism, and when the traction rope releases a certain length, the power is cut off and the self-locking is carried out, so that the main lifting motor is prevented from continuously rotating.
And one end of the central shaft of the auxiliary hoisting drum of the auxiliary hoisting mechanism 3 is provided with a hoisting encoder 27, and the other end is provided with a hoisting limiter 8.
Furthermore, the automatic casting trolley further comprises a PLC controller, wherein the PLC controller is respectively connected with the lifting limiter 8, the lifting encoder 27, the main lifting motor, the auxiliary lifting motor and the walking motor, receives signals of the lifting limiter and the lifting encoder, and controls the main lifting motor, the auxiliary lifting motor and the walking motor to operate.
In this embodiment, the lifting limiter is specifically a lifting height limiter.
A cable drum 26 is fixedly arranged between the main hoisting mechanism 2 and the auxiliary hoisting mechanism 3 and on the trolley frame 1, and the main hoisting mechanism, the auxiliary hoisting mechanism and the travelling mechanism are respectively supplied with power through cables.
As shown in fig. 2, the traveling mechanism 4 includes a traveling motor 41 fixed on the trolley frame 1, a traveling reducer 42, traveling wheels 43 and a guiding mechanism 44, an output shaft of the traveling motor 41 is connected to the traveling wheels 43 through the traveling reducer 42, the traveling wheels 43 move horizontally along the truss, the guiding mechanism 44 is four pairs of guiding units arranged along the truss at four corners of the trolley frame, each guiding unit includes a guiding frame 441 welded on the trolley frame 1 and a roller 442 transversely arranged on the guiding frame 441, the roller 442 is fixed on the guiding frame 441 through a central shaft and a bearing, and the trolley frame 1 is limited on the truss 9 to avoid derailing.
As shown in fig. 2, the spreader 5 includes a main hook 51 and a secondary hook 52, and the top end of the main hook 51 is connected to the traction rope of the main hoisting mechanism 2 through a set of movable pulleys 53.
The auxiliary hook 52 is connected with a traction rope of the auxiliary hoisting mechanism 3.
Furthermore, in order to more accurately detect the quality of molten steel in the steel ladle, the trolley frame 1 comprises a trolley chassis 11 in contact with the truss 9 and a trolley body 12 above the trolley chassis 11, the main hoisting mechanism 2 and the auxiliary hoisting mechanism 3 are both arranged on the trolley body 12, the travelling mechanism 4 is arranged on the trolley chassis 11, the trolley chassis 11 and the trolley body 12 are connected through a connecting rod 13, and two ends of the connecting rod 13 are respectively connected to the trolley chassis 11 and the trolley body 12 through hinged seats; a weighing sensor 14 is arranged between the trolley chassis 11 and the trolley body 12, and the change of the molten steel mass in the molten steel ladle is obtained through the change of the weight above the weighing trolley chassis 11, so that the real-time and accurate detection of the molten steel mass is realized.
The running process of the automatic casting trolley provided by the utility model is that the PLC controller controls the walking motor to move the trolley to the position of a steel ladle 10 filled with molten iron, the lifting motors of the main lifting mechanism and the auxiliary lifting mechanism are started to lower the main hook and the auxiliary hook, a worker hangs the main hook 51 on a hanging rod 101 of the steel ladle, and hangs the auxiliary hook 52 on a hanging ring 102 of the steel ladle; lifting motors of the main lifting mechanism and the auxiliary lifting mechanism lift the main hook and the auxiliary hook through traction ropes and lift the ladle at the same time; the travelling motor drives the trolley to move to a pouring position; the main hook and the auxiliary hook lower the steel ladle to a proper casting height, the auxiliary hoisting mechanism controls the auxiliary hook to rotate the steel ladle by taking the hanging rod 101 as a center, and molten iron is poured into the casting pool.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The automatic casting trolley is characterized by comprising a trolley frame arranged on a truss, a main hoisting mechanism, an auxiliary hoisting mechanism, a traveling mechanism and a lifting appliance, wherein the main hoisting mechanism, the auxiliary hoisting mechanism and the traveling mechanism are positioned on the trolley frame;
the main hoisting mechanism comprises a main hoisting motor, a main hoisting speed reducer and a main hoisting winding drum, which are erected on a trolley frame, an output shaft of the main hoisting motor is connected to the main hoisting speed reducer, an output shaft of the main hoisting speed reducer is connected to the main hoisting winding drum, and a brake is arranged between the main hoisting motor and the main hoisting speed reducer;
a fixed pulley is fixedly arranged on the side of the main hoisting drum through a support, and a traction rope output by the main hoisting drum is connected with a lower lifting appliance through the fixed pulley;
the auxiliary hoisting mechanism comprises an auxiliary hoisting motor, an auxiliary hoisting speed reducer and an auxiliary hoisting winding drum, which are erected on a trolley frame, wherein an output shaft of the auxiliary hoisting motor is connected to the auxiliary hoisting speed reducer; the auxiliary hoisting motor drives the auxiliary hoisting drum to rotate positively and negatively, and the traction rope on the auxiliary hoisting drum stretches and retracts to drive the lifting appliance connected below to lift.
2. The automatic casting trolley according to claim 1, wherein a pair of main hoisting mechanisms are symmetrically arranged on the trolley frame, main hoisting motors, main hoisting speed reducers and main hoisting drums of the two main hoisting mechanisms are respectively and symmetrically arranged, and the two main hoisting speed reducers are connected by a coupler.
3. The automatic casting trolley according to claim 2, wherein a lifting encoder and a lifting limiter are arranged on a central shaft of each main lifting drum of the main lifting mechanism, and the lifting encoder corresponds to the lifting height of the lifting appliance by recording the number of rotation turns of the main lifting drum; and one end of a central shaft of an auxiliary lifting winding drum of the auxiliary lifting mechanism is provided with a lifting encoder, and the other end of the central shaft is provided with a lifting limiter.
4. The automatic casting trolley as claimed in claim 1, wherein a cable reel is fixedly arranged on the trolley frame between the main hoisting mechanism and the auxiliary hoisting mechanism, and the cable reel supplies power to the main hoisting mechanism, the auxiliary hoisting mechanism and the travelling mechanism through cables respectively.
5. The automatic casting trolley according to claim 3, wherein the travelling mechanism comprises a travelling motor, a travelling reducer, travelling wheels and a guide mechanism, the travelling motor is fixed on a trolley frame, an output shaft of the travelling motor is connected to the travelling wheels through the travelling reducer, the travelling wheels move horizontally along the truss, the guide mechanism is four pairs of guide units arranged at four corners of the trolley frame and along the truss, each guide unit comprises a guide frame welded on the trolley frame and a roller transversely arranged on the guide frame, and the roller is fixed on the guide frame through a central shaft and a bearing to limit the trolley frame on the truss.
6. The automatic casting trolley as claimed in claim 5, further comprising a PLC controller, wherein the PLC controller is respectively connected with the lifting limiter, the lifting encoder, the main lifting motor, the auxiliary lifting motor and the walking motor, receives signals of the lifting limiter and the lifting encoder, and controls the main lifting motor, the auxiliary lifting motor and the walking motor to operate.
7. The automatic casting trolley according to claim 6, wherein the spreader comprises a main hook and an auxiliary hook, and the top end of the main hook is connected with a traction rope of a main hoisting mechanism through a group of movable pulleys; and the auxiliary hook is connected with a traction rope of the auxiliary hoisting mechanism.
8. The automatic casting trolley as claimed in claim 7, wherein the trolley frame comprises a trolley chassis in contact with the truss and a trolley body above the trolley chassis, the primary hoisting mechanism and the secondary hoisting mechanism are both arranged on the trolley body, the travelling mechanism is arranged on the trolley chassis, the trolley chassis and the trolley body are connected through a connecting rod, and two ends of the connecting rod are respectively connected to the trolley chassis and the trolley body through hinged seats.
9. The automated casting trolley of claim 8, wherein a load cell is disposed between the trolley chassis and the trolley body.
10. The automated casting trolley of claim 9, wherein the PLC controller is connected to a load cell disposed between the trolley chassis and the trolley body to receive weight information transmitted from the load cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120571957.7U CN214422118U (en) | 2021-03-19 | 2021-03-19 | Automatic casting trolley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120571957.7U CN214422118U (en) | 2021-03-19 | 2021-03-19 | Automatic casting trolley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214422118U true CN214422118U (en) | 2021-10-19 |
Family
ID=78074363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120571957.7U Active CN214422118U (en) | 2021-03-19 | 2021-03-19 | Automatic casting trolley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214422118U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115971434A (en) * | 2022-11-07 | 2023-04-18 | 常州市武进长虹结晶器有限公司 | Mold copper tube with dotted grooves and its system for promoting crystal growth of cast strands |
-
2021
- 2021-03-19 CN CN202120571957.7U patent/CN214422118U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115971434A (en) * | 2022-11-07 | 2023-04-18 | 常州市武进长虹结晶器有限公司 | Mold copper tube with dotted grooves and its system for promoting crystal growth of cast strands |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4360304A (en) | Extendable crane trolley and method | |
| CN205312907U (en) | Metallurgical two roof beam hoist formula hoist | |
| CN218320365U (en) | Truss-like coil of strip handling hoist | |
| CN111299563A (en) | Novel bottom pouring type casting machine for casting | |
| CN205312909U (en) | Two roof beam double small car bridge crane | |
| CN214422118U (en) | Automatic casting trolley | |
| CN216038231U (en) | General gantry crane | |
| CN214653067U (en) | Upper rotating crane trolley of crane special for steel plant | |
| CN217947452U (en) | Shaft construction lifting device | |
| CN109019353B (en) | Lifting equipment and lifting control method for building construction | |
| CN220502489U (en) | Special crane for metallurgy | |
| CN219971638U (en) | Low-clearance trolley for crane | |
| CN220078396U (en) | Floor type tipping winch | |
| CN214570227U (en) | High-stability beam lifting machine | |
| CN203021142U (en) | A counterweight-free hoist for double-slanted bridges | |
| CN215626241U (en) | Three-trolley two-beam six-rail casting crane | |
| CN114346225B (en) | Ladle covering and uncovering method for rotary double-station RH refining furnace | |
| CN115744607B (en) | Anti-interference and anti-swing system applied to combined traveling crane of high house beam | |
| CN219469491U (en) | Anti-offset device of trolley | |
| CN214141300U (en) | Special double-beam bridge crane for metallurgy | |
| CN2795180Y (en) | Movable transport trolley | |
| CN217349892U (en) | Track self-walking tank turning and tank collision integrated machine | |
| CN212953965U (en) | Upper shaft crown block for processing metal section | |
| CN202379642U (en) | Hoist-type lifting mechanism of steel ladle used for vacuum treatment of molten steel | |
| CN218174455U (en) | Bridge crane for overturning steel ladle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |