Rotary dust removal device for steel ladle

Abstract

The utility model relates to a rotary dust removal device for a steel ladle, and belongs to the field of steel ladle refining. The dust removal device comprises a fixed stand column and is structurally characterized by further comprising a flue cross beam, a top suction hood, a dust removal elbow and a rotary flue, the top suction hood is communicated with the flue cross beam, the flue cross beam is communicated with the rotary flue, the rotary flue is communicated with the dust removal elbow, the rotary flue is controlled by a driving mechanism to rotate, and the dust removal elbow is connected with the fixed stand column. One end of the rotary flue is rotatably arranged on the fixed stand column, the other end of the rotary flue is rotatably matched with the dust removal bent pipe, the driving mechanism comprises a gear motor, a driving gear and an outer tooth slewing bearing, an inner ring of the outer tooth slewing bearing is fixed on the fixed stand column, the rotary flue is fixed on an outer ring of the outer tooth slewing bearing, and the driving gear is fixed on the outer ring of the outer tooth slewing bearing. The gear motor is fixed to the fixed stand column, the driving gear is installed on a motor shaft of the gear motor, and the driving gear is meshed with the outer ring of the outer tooth slewing bearing.

Description

Technical Field

[0001] The utility model relates to a rotary dust removal device for a ladle, belonging to the field of ladle refining. Background Art

[0002] With the expansion of the scale of the metallurgical industry, the problems of energy consumption and environmental pollution have become increasingly prominent; most domestic steel mills need to be upgraded and transformed; among them, when tapping steel from the refining furnace, a large amount of dust often overflows when the ladle car carries the ladle to the waiting position for ladle transfer.

[0003] In view of this, in the patent document with the application number 200820055478.4, a tilting ladle dust hood mechanism is disclosed. For the dust hood mechanism in the above prior art, the working position A and the non-working position B of the ladle dust hood 3. When the ladle dust hood mechanism is needed, the dust hood is lowered for dust removal work, which is the working position A; when the dust removal work is completed, the dust hood tilts and rises, which is the non-working position B. It realizes the switching of the ladle dust hood 3 between the working and non-working states by controlling the swing of the ladle dust hood 3 in the horizontal and vertical directions, rather than the switching between each working station in the horizontal direction, with low space utilization and inconvenient maintenance. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies existing in the prior art, and to provide a rotary dust removal device for a ladle with a reasonable structural design.

[0005] The technical solution adopted by the utility model to solve the above problems is: the rotary dust removal device for a ladle includes a fixed column, and its structural feature is that it further includes a flue cross beam, a top suction hood, a dust removal elbow and a rotary flue. The top suction hood is communicated with the flue cross beam, the flue cross beam is communicated with the rotary flue, the rotary flue is communicated with the dust removal elbow, the rotary flue is controlled to rotate by a driving mechanism, one end of the rotary flue is rotatably arranged on the fixed column, and the other end of the rotary flue is rotatably matched with the dust removal elbow.

[0006] Further, the driving mechanism includes a reduction motor, a driving gear and an external gear slewing bearing. The inner ring of the external gear slewing bearing is fixed on the fixed column, the rotary flue is fixed on the outer ring of the external gear slewing bearing, the reduction motor is fixed on the fixed column, the driving gear is installed on the motor shaft of the reduction motor, and the driving gear meshes with the outer ring of the external gear slewing bearing.

[0007] Further, a gear dust-proof cover is arranged outside the driving gear and the external gear slewing bearing.

[0008] Further, the reduction motor is controlled by a limit switch assembly, which includes a limit switch and a collision block. The collision block is fixed on the rotary flue. One limit switch is provided at each of the standby station and the working station, and the limit switch cooperates with the collision block.

[0009] Further, a counterweight is provided at the end of the flue crossbeam.

[0010] Further, one end of the flue crossbeam is connected to a fixed pull rod, and the other end of the fixed pull rod is connected to the rotary flue.

[0011] Compared with the prior art, the utility model has the following advantages: The power output by the reduction motor (cycloidal speed reducer) is transmitted to the external gear slewing bearing through the driving gear. The rotation of the external gear slewing bearing drives the rotation of the flue crossbeam. The top suction hood is connected to the flue crossbeam, and the position switching of the rotary dust removal hood is controlled by the signal of the limit switch in place; the dust removal elbow is fixed and concentric with the external gear slewing bearing; different ladles of different sizes can also be adapted by appropriately changing the power of the driving motor, the sizes of the top suction hood and the flue crossbeam.

[0012] The driving mechanism can drive the swing of the top suction hood, and the mutual switching between one standby position and two working positions can be realized. The rotary dust removal device has reasonable space utilization, effectively increases the space utilization rate, improves the production efficiency, and the stability and reliability of the equipment greatly reduce the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional structural schematic diagram of the rotary dust removal device according to an embodiment of the utility model.

[0014] Figure 2 is a partial structural schematic diagram of the rotary dust removal device according to an embodiment of the utility model.

[0015] Figure 3 is a front view structural schematic diagram of the use state of the rotary dust removal device according to an embodiment of the utility model.

[0016] Figure 4 is a top view structural schematic diagram of the use state of the rotary dust removal device according to an embodiment of the utility model.

[0017] In the figure: fixed column 1, flue crossbeam 2, top suction hood 3, fixed pull rod 4, dust removal elbow 5, counterweight 6, rotary flue 7, reduction motor 8, driving gear 9, gear dust cover 10, limit switch 11, external gear slewing bearing 12, ladle 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model will be further described in detail below in conjunction with the accompanying drawings and through embodiments. The following embodiments are explanations of the present utility model, and the present utility model is not limited to the following embodiments.

[0019] Embodiment

[0020] Refer to Figures 1 to 4 As shown, it should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical essential meanings. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, if terms such as "upper", "lower", "left", "right", "middle", and "one" are cited in this specification, they are only for the convenience of clear narration and are not used to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present utility model can be implemented.

[0021] The rotary dust removal device for a ladle in this embodiment includes a fixed column 1, a flue crossbeam 2, a top suction hood 3, a dust removal elbow 5, and a rotary flue 7. A counterweight 6 is provided at the end of the flue crossbeam 2. The top suction hood 3 is communicated with the flue crossbeam 2, the flue crossbeam 2 is communicated with the rotary flue 7, the rotary flue 7 is communicated with the dust removal elbow 5, the rotary flue 7 is controlled to rotate by a driving mechanism, one end of the rotary flue 7 is rotatably arranged on the fixed column 1, the other end of the rotary flue 7 is rotatably matched with the dust removal elbow 5, one end of the flue crossbeam 2 is connected to a fixed pull rod 4, and the other end of the fixed pull rod 4 is connected to the rotary flue 7.

[0022] The driving mechanism in this embodiment includes a reduction motor 8, a driving gear 9, and an external gear slewing bearing 12. The inner ring of the external gear slewing bearing 12 is fixed on the fixed column 1, the rotary flue 7 is fixed on the outer ring of the external gear slewing bearing 12, the reduction motor 8 is fixed on the fixed column 1, the driving gear 9 is installed on the motor shaft of the reduction motor 8, and the driving gear 9 meshes with the outer ring of the external gear slewing bearing 12. A gear dust cover 10 is arranged outside the driving gear 9 and the external gear slewing bearing 12.

[0023] The reduction motor 8 in this embodiment is controlled by a limit switch assembly 11. The limit switch assembly 11 includes a limit switch and a collision block. The collision block is fixed on the rotary flue 7. A limit switch is provided at each of the standby station and the working station, and the limit switch cooperates with the collision block.

[0024] Specifically, when the rotary dust removal device is working, power is transmitted to the driving gear 9 through the motor shaft of the reduction motor 8. The driving gear 9 is fixed to the motor shaft through a baffle and a key. The reduction motor 8 is fixedly connected to the fixed column 1 through bolts. The inner ring of the external gear slewing bearing 12 is fixedly connected to the fixed column 1 through bolts. The rotary flue 7 is fixedly connected to the outer ring of the external gear slewing bearing 12 through bolts. The flue cross beam 2 is fixedly connected and communicated with the rotary flue 7. The end of the rotary flue 7 is fixedly connected and communicated with the top suction hood 3. The three structures form an integral whole. The reduction motor 8 drives the rotary flue 7, the flue cross beam 2 and the top suction hood 3 to rotate through the meshing of the driving gear 9 with the external teeth of the external gear slewing bearing 12 to achieve the purpose of rotation. Then, the in-place signal is realized through the limit switch assembly 11, and the switching of each working position between the standby position and the working position is realized through the cooperation of the in-place signal and the reduction motor 8. A gear dust cover 10 is made around the external gear slewing bearing 12 to prevent dust from adhering to the tooth surfaces of the driving gear 9 and the external gear slewing bearing 12, causing rotation jamming. The dust removal elbow 5 is fixed and immovable, and the top of the rotary flue 7 is inserted into the inside of the dust removal elbow 5. The flue gas is sucked in from the top suction hood 3, passes through the flue cross beam 2 to the rotary flue 7, and finally is collected into the workshop gas collecting main pipe through the dust removal elbow 5. The above constitutes the entire rotary dust removal device.

[0025] Among them, the fixed column 1 is made by welding a rolled steel pipe and upper and lower flange surfaces. The bottom of the fixed column 1 is fixedly connected to the ground through embedded bolts. The top of the fixed column 1 is fixedly connected to the inner ring of the external gear slewing bearing 12 through bolts, with a simple structure and convenient processing.

[0026] Among them, the reduction motor 8 uses a cycloidal reduction motor, which has stable performance, simple structure and low cost.

[0027] Among them, the gear dust cover 10 is made of sheet metal structure, mainly used for dust prevention of the external gear slewing bearing 12 and the driving gear 9; preventing workshop dust from falling on the tooth surfaces, resulting in gear wear or jamming.

[0028] Among them, the rotary flue 7 and the flue cross beam 2 rotate synchronously.

[0029] Among them, the flue cross beam 2 is made into a box structure by welding a steel plate and profiles, which not only ensures the structural strength but also allows the flue gas to pass through.

[0030] Among them, the counterweight 6 pulls the center of the moving part of the entire equipment back to a position close to the rotation center; enabling the fixed column 1 to mainly bear axial force, reducing the overturning moment and increasing the structural stability.

[0031] Among them, the structure of the top suction hood 3 is an umbrella shape, and the top is a dust suction pipe, which can more effectively collect dust and prevent dust from escaping; at the same time, the inside of the hood is fully filled with refractory materials to prevent the top suction hood from deforming due to high temperature.

[0032] Among them, the fixed pull rod 4 is made by flattening both ends of a seamless steel pipe; both ends are in a hinged form, one end is fixed on the rotating flue 7, and the other end is pulled on the flue cross beam 2, which can effectively increase the structural stability of the entire flue cross beam 2.

[0033] Among them, the dust removal elbow 5 is concentric with the rotating flue 7. The dust removal elbow 5 is 20 mm larger than the rotating flue 7 on one side. The rotating flue 7 is inserted into the dust removal elbow 5, and the dust removal elbow 5 is fixed. Such a structure can effectively reduce the entry of wild air, reduce the dust overflow, and improve the dust removal effect.

[0034] Among them, the limit switch assembly 11 mainly consists of a limit switch, a mounting plate and a striker. The limit switch is installed at each working station, and the striker is welded on the rotating flue 7. When the top suction hood 3 rotates to a certain working station, the limit switch at this working station is triggered, and the top suction hood 3 stops at this working station; this limit switch assembly 11 can also be replaced with a proximity switch to achieve this function. The above structure has a low cost and is simple in structure.

[0035] In addition, it should be noted that for the specific embodiments described in this specification, the shapes and names of their parts can be different. The above content described in this specification is only an example of the structure of the present invention. Any equivalent changes or simple changes made according to the structure, features and principles conceived in the patent of the present invention are included in the protection scope of the patent of the present invention. Those skilled in the art of the present invention can make various modifications, supplements or use similar methods to replace the specific embodiments described, as long as they do not deviate from the structure of the present invention or exceed the scope defined by this claim book, they should fall within the protection scope of the present invention.

Claims

1. A rotary dust removal device for a ladle, comprising a fixed column (1), characterized in that: It also includes a flue cross beam (2), a top suction hood (3), a dust removal elbow (5) and a rotating flue (7). The top suction hood (3) is communicated with the flue cross beam (2), the flue cross beam (2) is communicated with the rotating flue (7), the rotating flue (7) is communicated with the dust removal elbow (5), the rotation of the rotating flue (7) is controlled by a driving mechanism, one end of the rotating flue (7) is rotatably arranged on a fixed column (1), and the other end of the rotating flue (7) is rotatably matched with the dust removal elbow (5).

2. The rotary dust removal device for a ladle according to claim 1, characterized in that: The driving mechanism includes a reduction motor (8), a driving gear (9) and an external gear slewing bearing (12). The inner ring of the external gear slewing bearing (12) is fixed on the fixed column (1), the rotating flue (7) is fixed on the outer ring of the external gear slewing bearing (12), the reduction motor (8) is fixed on the fixed column (1), the driving gear (9) is installed on the motor shaft of the reduction motor (8), and the driving gear (9) meshes with the outer ring of the external gear slewing bearing (12).

3. The rotary dust removal device for a ladle according to claim 2, characterized in that: A gear dust cover (10) is arranged outside the driving gear (9) and the external gear slewing bearing (12).

4. The rotary dust removal device for a ladle according to claim 2, characterized in that: The reduction motor (8) is controlled by a limit switch assembly (11). The limit switch assembly (11) includes a limit switch and a collision block. The collision block is fixed on the rotating flue (7), and a limit switch is arranged at each of the standby station and the working station. The limit switch cooperates with the collision block.

5. The rotary dust removal device for a ladle according to claim 1, characterized in that: A counterweight block (6) is arranged at the end of the flue cross beam (2).

6. The rotary dust removal device for a ladle according to claim 1, characterized in that: One end of the flue cross beam (2) is connected with a fixed pull rod (4), and the other end of the fixed pull rod (4) is connected with the rotating flue (7).

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