CN213763992U

CN213763992U - Molten steel transfer device

Info

Publication number: CN213763992U
Application number: CN202022411663.6U
Authority: CN
Inventors: 陈博; 王永; 张国柱; 王颖; 刘煜斌; 李凌宇
Original assignee: Shen Kan Qinhuangdao General Engineering Design and Research Institute Corp of MCC
Current assignee: Shen Kan Qinhuangdao General Engineering Design and Research Institute Corp of MCC
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-07-23
Anticipated expiration: 2030-10-27

Abstract

The utility model provides a molten steel transfer device, include: the ladle is used for containing molten steel; the ladle car group is used for bearing and transferring ladles; and the baking mechanism is arranged on a moving path of the ladle and used for baking the ladle before the empty ladle is filled with molten steel. The empty ladle passes through the baking mechanism and stops at the baking mechanism while being transported back to the previous process. The baking mechanism bakes the empty ladle to maintain the ladle at a higher temperature. When the ladle is used for containing new molten steel, the temperature rise is small, the expansion deformation amplitude is small, and the service life is prolonged.

Description

Molten steel transfer device

Technical Field

The utility model relates to an electric stove steelmaking equipment field especially relates to a molten steel transfer device.

Background

The conventional electric furnace steelmaking workshop comprises electric furnaces, refining furnaces, continuous casting machines and other equipment, and a complete tapping period mainly comprises the processes of electric furnace smelting, preparation time, refining furnace smelting, continuous casting machine blank discharging and the like.

In an electric furnace steelmaking workshop, molten steel obtained by electric furnace smelting needs to be transferred to a refining furnace, molten steel obtained by refining furnace smelting needs to be transferred to a continuous casting machine, and the processes all need to use a transfer device. The transfer device comprises a ladle for containing molten steel, and the ladle is transferred between the electric furnace and the refining furnace and between the refining furnace and the continuous casting machine by virtue of other structures of the transfer device. After the molten steel in the ladle is poured into the equipment of the next procedure, other structures of the transfer device are required to transfer the empty ladle back to the previous procedure for circulation.

The temperature of the empty ladle has been greatly reduced when it is returned to the previous process and filled with new molten steel. After the ladle is filled with new molten steel, the temperature rises suddenly, the expansion deformation amplitude is large, and the service life of the ladle is often shortened.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the ladle suddenly heats up after containing new molten steel and has short service life, the utility model aims at providing a molten steel transfer device.

The utility model provides a following technical scheme:

a molten steel transfer device comprising:

the ladle is used for containing molten steel;

the ladle car group is used for bearing and transferring the ladles; and

and the baking mechanism is arranged on a moving path of the ladle and is used for baking the ladle before the empty ladle is filled with molten steel.

As a further optional scheme to molten steel transfer device, toast the mechanism and include the roaster, it has first gas pipeline and second gas pipeline to connect on the roaster, first gas pipeline is used for to the roaster provides combustible gas, the second gas pipeline is used for to the roaster provides combustion-supporting gas.

As a further optional scheme of the molten steel transferring device, the device further comprises a lifting mechanism, and the roaster is arranged above the lifting mechanism;

the ladle car group comprises two ladle cars, and the two ladle cars transfer the ladles in a relay manner;

the lifting mechanism comprises bases which are arranged on two sides of a moving path of the steel ladle in pairs, first jacking assemblies are arranged on the bases and lift the steel ladle upwards, so that the steel ladle is separated from the ladle car, and the steel ladle is convenient to transfer between the two ladle cars.

As a further optional scheme for the molten steel transferring device, a second jacking assembly is arranged on the base, and when the ladle containing molten steel is lifted by the first jacking assembly, the second jacking assembly lifts the roaster upwards.

As a further optional scheme for the molten steel transferring device, lifting support blocks are arranged on two sides of the steel ladle, a lifting support seat is arranged on the first jacking assembly, and a limiting groove clamped with the lifting support blocks is arranged on the lifting support seat.

As a further alternative to the molten steel transfer device, the lifting support block is higher than the center of gravity of the ladle.

As a further optional scheme of the molten steel transfer device, horizontal lifting trunnions are arranged on two sides of the ladle, when the ladle is overhauled, the lifting trunnions are convenient for a crane to lift the ladle, and the lifting support is connected with one end, far away from the ladle, of the lifting trunnions.

As a further optional scheme of the molten steel transfer device, one ends of the two ladle carriages opposite to each other are arranged in a concave manner.

As a further optional scheme of the molten steel transferring device, a locking piece is arranged on the first jacking assembly.

As a further optional scheme of the molten steel transferring device, the molten steel transferring device further comprises a control mechanism, and the control mechanism comprises:

the controller controls the opening and closing of the first jacking assembly and the buggy ladle;

the first limit switches are electrically connected with the controller, the first limit switches are arranged on the base in pairs, and the first limit switches are respectively matched with the two buggy ladles; and

and the second limit switches are electrically connected with the controller and are arranged on the base in pairs, and the second limit switches are respectively matched with the two first jacking assemblies.

The embodiment of the utility model has the following beneficial effect:

the empty ladle passes through the baking mechanism and stops at the baking mechanism while being transported back to the previous process. The baking mechanism bakes the empty ladle to maintain the ladle at a higher temperature. When the ladle is used for containing new molten steel, the temperature rise is small, the expansion deformation amplitude is small, and the service life is prolonged.

In order to make the aforementioned and other objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a plan view of a molten steel transfer device according to embodiment 1 of the present invention;

FIG. 2 is a front view of a molten steel transfer device according to embodiment 1 of the present invention;

FIG. 3 is a front view of a molten steel transfer device according to embodiment 2 of the present invention;

FIG. 4 is a front view of a ladle in the molten steel transfer apparatus according to embodiment 2 of the present invention;

FIG. 5 is a schematic structural view of a ladle car group in the molten steel transfer apparatus according to embodiment 2 of the present invention;

fig. 6 is a schematic structural view showing a control mechanism in a molten steel transfer apparatus according to embodiment 2 of the present invention.

Description of the main element symbols:

1-steel ladle; 11-lifting supporting blocks; 12-handling trunnions; 13-a support base; 2-ladle car group; 21-buggy ladle; 3-a baking mechanism; 31-a roaster; 32-a first gas line; 33-a second gas line; 34-a second jacking assembly; 35-a scaffold; 351-legs; 352-a support plate; 4-a lifting mechanism; 41-a base; 42-a first jacking assembly; 43-a lifting support; 5-a control mechanism; 51-a controller; 52-first limit switch; 53-second limit switch.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

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 an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

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 application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1 and 2 together, the present embodiment provides a molten steel transfer device, which includes a ladle 1, a ladle car set 2, and a baking mechanism 3. Wherein the ladle 1 serves as a vessel for containing molten steel. The ladle car set 2 carries the ladle 1 and transfers the ladle between the electric furnace and the refining furnace and between the refining furnace and the continuous casting machine. The baking mechanism 3 is disposed on a moving path of the ladle 1.

Specifically, the baking mechanism 3 includes a roaster 31 and a first gas line 32. The first gas line 32 is connected to the roaster 31, and supplies a combustible gas, such as liquefied petroleum gas, etc., to the roaster 31. The roaster 31 ignites the combustible gas and controls the spray direction of the flame.

The roaster 31 is disposed above the moving path of the ladle 1, passes through the roaster 31, and stays below the roaster 31 when the ladle car carries the empty ladle 1 from the refining furnace back to the electric furnace, or from the continuous casting machine back to the refining furnace. At this time, the roaster 31 is turned on, and the roaster 31 sprays out a flame downward to bake and heat the interior of the ladle 1, so that the ladle 1 is maintained at a high temperature. Thereafter, the empty ladle 1 continues to move and is filled with new molten steel. Because the temperature difference between the steel ladle 1 and the molten steel is small, the temperature rise of the steel ladle 1 filled with new molten steel is small, the expansion deformation amplitude is small, and the service life is greatly prolonged.

In order to increase the flame temperature, on the one hand, the gas supply amount of the first gas pipeline 32 can be increased, and on the other hand, combustion-supporting gas can be supplied to the roaster 31, so that the combustible gas can be fully combusted and reacted. Therefore, the roaster 31 is further connected with a second gas line 33, and the second gas line 33 supplies oxygen or air as a combustion-supporting gas to the roaster 31.

Example 2

Referring to fig. 3 to 6, the present embodiment provides a molten steel transferring apparatus, which includes a ladle 1, a ladle car set 2, a baking mechanism 3, a lifting mechanism 4, and a control mechanism 5.

Hoisting trunnions 12 are respectively welded and fixed on two sides of the ladle 1, the hoisting trunnions 12 are arranged along the horizontal direction and point to the center of the ladle 1, and the cross sections of the hoisting trunnions 12 are circular. In addition, the lifting trunnion 12 is higher than the center of gravity of the ladle 1 in an empty state and is also higher than the center of gravity of the ladle 1 as a whole with molten steel when the ladle is filled with molten steel.

When the molten steel transfer device breaks down, the plate hook of the travelling crane can be used for hooking the lifting trunnion 12, so that the steel ladle 1 is lifted, and the maintenance is convenient.

The supporting seat 13 is fixed on the outer side wall of the steel ladle 1 in a welding or bolting mode, and the supporting seat 13 is matched with the steel ladle car group 2, so that the steel ladle 1 can be stably placed on the steel ladle car group 2.

Specifically, ladle car group 2 includes two ladle cars 21. The ladle 1 is relayed and carried by two ladle carriages 21 in the transferring process, and the ladle 1 is transferred between the two ladle carriages 21 by utilizing the lifting mechanism 4.

Taking the transfer of molten steel between an electric furnace and a refining furnace as an example: the empty ladle 1 receives molten steel at the electric furnace and is transported to the lifting mechanism 4 by one of the ladle carriages 21. Ladle 1 is transferred to another ladle carriage 21 by means of elevating mechanism 4 and then transported to the refining furnace by another ladle carriage 21. After pouring the molten steel in ladle 1 into the refining furnace, the empty ladle 1 is still transferred between two ladle carriages 21 via the lifting mechanism 4 on the way back.

Specifically, the lifting mechanism 4 includes a base 41, a first jacking assembly 42 and a lifting support 43, and the base 41, the first jacking assembly 42 and the lifting support 43 are all arranged in pairs on two sides of the moving path of the ladle 1.

The base 41 is fixed on the ground, and the buggy ladle 21 can be driven between the two bases 41.

The first jacking assembly 42 is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is bolted and fixed on the upper surface of the corresponding base 41, and the piston rod of the hydraulic cylinder vertically extends upwards and is fixedly connected with the lifting support 43.

The upper surface of the lifting support 43 is provided with a limiting groove, the limiting groove penetrates through the lifting support 43 along the connecting line direction of the two bases 41, and the cross section of the limiting groove is square.

Correspondingly, a lifting support block 11 is welded and fixed at one end of the lifting trunnion 12 far away from the ladle 1. The lifting support block 11 is in a cuboid shape and is clamped with the limiting groove.

When one of the ladle carriages 21 transports the ladle 1 filled with molten steel to a position between the two bases 41, the hydraulic cylinder is in a contraction state, and the lifting support block 11 is positioned right above the limiting groove. And (3) controlling a piston rod of the hydraulic cylinder to extend out, so that the lifting support seat 43 is clamped with the lifting support block 11 through the limiting groove, and continuously lifting the lifting support block 11 upwards, thereby lifting the ladle 1 and separating the ladle 1 from the ladle car 21.

After the ladle 1 is lifted to a certain height, the ladle carriage 21 moves toward the electric furnace and is withdrawn from below the ladle 1. At this time, another ladle carriage 21 moves below the ladle 1. The piston rod of the hydraulic cylinder is controlled to retract, and then the ladle 1 can be placed on another ladle car 21. After the lifting support 43 is completely separated from the lifting support block 11, the ladle 1 can be transported away by another ladle carriage 21.

In order to shorten the lifting stroke of the ladle 1 and reduce the lifting time of the ladle 1, the end beams at the opposite ends of the two ladle carriages 21 are cancelled and have a concave structure. At this time, the ladle 1 is only required to be lifted upwards by 200 mm and 500mm, and the two ladle carriages 21 can be withdrawn from the lower part of the ladle 1.

In order to avoid the falling or overturning of the ladle 1 caused by the pressure loss and other faults of the hydraulic cylinder, a locking piece is arranged on the hydraulic cylinder. In this embodiment, the locking member is specifically a brake, and the brake can brake the hydraulic cylinder when the hydraulic cylinder fails, so as to stabilize the ladle 1 in situ, and wait for the travelling crane to lift the ladle 1 to a safe position for maintenance.

Besides the first jacking assemblies 42, the two bases 41 are respectively provided with a second jacking assembly 34. The second jacking assembly 34 also adopts a hydraulic cylinder, and a piston rod of the hydraulic cylinder vertically extends upwards and is fixedly bolted with a bracket 35.

The support frame 35 is composed of a vertical leg 351 and a horizontal support plate 352, wherein the bottom end of the leg 351 is connected with the second jacking assembly 34, and the top end of the leg is fixedly connected with the support plate 352. The roaster 31 in the roasting mechanism 3 is fixed on the support plate 352, and when the ladle 1 is lifted, the roaster 31 and the support plate 352 are positioned right above the ladle 1.

When the ladle 1 containing molten steel is transferred between the two ladle cars 21, the second jacking assembly 34 and the first jacking assembly 42 synchronously act to enable the roaster 31 and the ladle 1 to synchronously lift, and the distance between the roaster 31 and the ladle 1 is kept unchanged. At this time, the first gas line 32 and the second gas line 33 are both in a closed state, thereby preventing an accident.

The second jacking assembly 34 is stationary while the empty ladle 1 is transferred between two ladle carriages 21. As the ladle 1 is lifted up by the first lifting assembly 42, the distance between the upper end of the ladle 1 and the roaster 31 is shortened. At this time, the first gas pipeline 32 and the second gas pipeline 33 respectively supply combustible gas and combustion-supporting gas to the roaster 31, and flame generated by combustion bakes the ladle 1, so that the ladle 1 is maintained at a higher temperature, the temperature difference between the ladle 1 and molten steel when the ladle 1 is filled with molten steel is reduced, and the service life of the ladle 1 is prolonged.

In order to cooperate with the elevation of the roaster 31, a bellows hose is used for a partial section of the first and

second gas lines

32 and 33.

The control mechanism 5 is composed of a controller 51, a first limit switch 52 and a second limit switch 53. Wherein, the controller 51 can control the opening and closing of the first jacking assembly 42 and the buggy ladle 21, and the controller 51 is electrically connected with the first limit switch 52 and the second limit switch 53 respectively.

The first limit switches 52 are arranged on the base 41 in pairs, and the two first limit switches 52 are respectively matched with the two buggy ladles 21 to monitor whether the two buggy ladles 21 are in place or not and transmit signals to the controller 51 after the two buggy ladles 21 are in place.

The second limit switches 53 are arranged on the base 41 in pairs, and the two second limit switches 53 are respectively matched with the two first jacking assemblies 42 and used for monitoring the telescopic state of the first jacking assemblies 42 and transmitting a signal to the controller 51 when the first jacking assemblies 42 reach the end point of the stroke.

Taking the process of transferring the ladle 1 from one of the carriages 21 to the other carriage 21 as an example, when one of the carriages 21 is in place, the first limit switch 52 gives a signal, the controller 51 receives the signal and feeds the signal back to the first jacking assembly 42, and the first jacking assembly 42 lifts the ladle 1 upwards. When the first jack assembly 42 reaches the top of the stroke, the second limit switch 53 sends a signal to the controller 51. At this time, the ladle 1 is lifted in place, the controller 51 controls one of the buggy ladles 21 to evacuate from below the ladle 1, and then the other buggy ladle 21 moves below the ladle 1. When another ladle car 21 is in place, the corresponding first limit switch 52 gives a signal, the controller 51 receives the signal and feeds the signal back to the first jacking assembly 42, and the first jacking assembly 42 lowers the ladle 1. When the first jack assembly 42 reaches the bottom end of the stroke, the second limit switch 53 sends a signal to the controller 51. At this time, the ladle 1 is already mounted on another ladle carriage 21, and the controller 51 controls the other ladle carriage 21 to move toward the refining furnace, and the entire ladle 1 transfer process is completed.

The control process is completed in a main control chamber of the electric furnace or the refining furnace, so that the site dangerous operation is avoided, and meanwhile, the control precision can be improved.

In another embodiment of the present application, more second limit switches 53 may be further disposed on the base 41 for monitoring the operating status of the second jacking assembly 34.

In another embodiment of the present application, a high temperature resistant camera may be further disposed on the base 41, and the video signal is fed back to the main control room of the electric furnace or the refining furnace, so as to play a role of monitoring.

The time that utilizes driving handling ladle 1 to shift in traditional workshop is about 10 ~ 12min, and this molten steel transfer device's ladle 1 transfer cycle includes: one buggy ladle 21 reaches the base 41 for about 2min, the ladle 1 is lifted, waited and descended for about 3min, the other buggy ladle 21 is moved to the refining furnace for about 2min, the total period is 7-8 min, and about 1/3 time is saved. On the basis of shortening the transfer time, the temperature of the molten steel is reduced less, the temperature rise time of the refining furnace is shortened by phase change, the energy consumption is reduced, and the overall smelting rhythm is accelerated. In addition, the arranged baking mechanism 3 ensures that the empty ladle 1 is fully dried and baked before receiving molten steel, and the service life of the ladle 1 can be prolonged.

In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in detail and specific, but not intended to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A molten steel transfer device, comprising:

the ladle is used for containing molten steel;

the ladle car group is used for bearing and transferring the ladles; and

2. The molten steel transfer device of claim 1, wherein the roasting mechanism comprises a roaster, and a first gas pipeline and a second gas pipeline are connected to the roaster, wherein the first gas pipeline is used for providing combustible gas for the roaster, and the second gas pipeline is used for providing combustion-supporting gas for the roaster.

3. The molten steel transporting device according to claim 2, further comprising a lifting mechanism, wherein the roaster is disposed above the lifting mechanism;

4. The molten steel transfer device of claim 3, wherein a second lifting assembly is provided on the base, and when the ladle containing molten steel is lifted by the first lifting assembly, the second lifting assembly lifts the roaster upward.

5. The molten steel transfer device of claim 3, wherein lifting support blocks are disposed on two sides of the ladle, a lifting support seat is disposed on the first jacking assembly, and a limit groove engaged with the lifting support blocks is disposed on the lifting support seat.

6. The molten steel transfer device of claim 5, wherein the elevation support block is higher than a center of gravity of the ladle.

7. The molten steel transfer device according to claim 5, wherein horizontal lifting trunnions are arranged on two sides of the ladle, when the ladle is overhauled, the lifting trunnions are convenient for a crane to lift the ladle, and the lifting support is connected with one end, far away from the ladle, of the lifting trunnions.

8. The molten steel transfer device of claim 3, wherein opposite ends of the two carriages are each arranged in a concave manner.

9. The molten steel transfer device of claim 3, wherein a locking member is provided on the first jacking assembly.

10. The molten steel transfer device of claim 3, further comprising a control mechanism, the control mechanism comprising: