Multi-station switching device for vacuum refining furnace

Abstract

The utility model relates to a multi-station switching device for a vacuum refining furnace, and belongs to the field of molten steel refining. The vacuum system comprises a first lifting lug, a second lifting lug, an elbow, a vacuum system header pipe and a vacuum system branch pipe, the first lifting lug and the second lifting lug are arranged on the two sides of the elbow respectively, and the vacuum system branch pipe is matched with the vacuum system header pipe through the elbow. The lifting device is structurally characterized by further comprising a fan-shaped track, a moving trolley, a first lifting oil cylinder, a second lifting oil cylinder, a universal rotating lifting ring and a pin shaft, the moving trolley is installed on the fan-shaped track, a cylinder barrel of the first lifting oil cylinder is installed on the moving trolley, a piston rod of the first lifting oil cylinder is connected with a first lifting lug, and a piston rod of the second lifting oil cylinder is connected with a second lifting lug. A cylinder barrel of the second lifting oil cylinder is fixed, a piston rod of the second lifting oil cylinder is rotationally connected with the second lifting lug, a universal rotating lifting ring is installed on the piston rod of the second lifting oil cylinder, and the universal rotating lifting ring is connected with the second lifting lug through a pin shaft.

Description

Technical Field

[0001] The utility model relates to a multi-station switching device for a vacuum refining furnace, belonging to the field of molten steel refining. Background Art

[0002] Vacuum degassing devices (VD), vacuum pouring (VC) or vacuum oxygen decarburization devices (VOD) have become an indispensable part of high-quality steel production. Most domestic steel mills need to be upgraded and renovated, among which increasing production is one of the main renovation targets. The most commonly used method now is double-station switching. In the multi-station switching process, multiple double-stations are usually connected in series for multi-station switching. Although this operation can achieve multi-station switching, it requires a larger space to achieve, which is more difficult for renovation projects, increases costs, and has poor economic efficiency.

[0003] The current conventional station switching method uses valves or reduction motors to drive the rotation to drive the lifting elbow frame. However, in fact, the valve switching seal leakage has a greater impact on the vacuum degree. The reduction motor drives the rotating elbow frame to switch, which requires huge investment and space, and brings many inconveniences to production and maintenance operations.

[0004] In view of this, a mobile switching device for a dual-station vacuum refining system is disclosed in the patent document with application number 201320435788.X. In the above-mentioned prior art, a movable elbow 4 is used to switch the working station of the vacuum device, and only the mutual switching of the two stations can be realized, rather than adopting a fan-shaped structure to rotate and switch the stations. The number of switching stations is small and the space occupied is large. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a multi-station switching device for a vacuum refining furnace with a reasonable structural design.

[0006] The technical solution adopted by the utility model to solve the above-mentioned problem is: the multi-station switching device for a vacuum refining furnace includes a No. 1 lifting ear, a No. 2 lifting ear, an elbow, a vacuum system main pipe and a vacuum system branch pipe, the No. 1 lifting ear and the No. 2 lifting ear are respectively arranged on both sides of the elbow, the vacuum system branch pipe and the vacuum system main pipe are matched with the elbow, and its structural characteristics are: it also includes a fan-shaped track, a moving trolley, a No. 1 lifting cylinder and a No. 2 lifting cylinder, the moving trolley is installed on the fan-shaped track, the cylinder barrel of the No. 1 lifting cylinder is installed on the moving trolley, the piston rod of the No. 1 lifting cylinder is connected to the No. 1 lifting ear, the cylinder barrel of the No. 2 lifting cylinder is fixed, and the piston rod of the No. 2 lifting cylinder is rotatably connected to the No. 2 lifting ear.

[0007] Furthermore, it also includes a universal rotating lifting ring and a pin shaft. The universal rotating lifting ring is installed on the piston rod of the No. 2 lifting cylinder, and the universal rotating lifting ring is connected to the No. 2 lifting ear through a pin shaft.

[0008] Furthermore, the arc center of the fan-shaped track coincides with the axis of the second lifting cylinder.

[0009] Furthermore, there are three workstations when the mobile trolley moves on the fan-shaped track, and a limit switch is installed at each workstation on the fan-shaped track.

[0010] Furthermore, the three workstations are workstation No. 1, workstation No. 2 and workstation No. 3, and each workstation is provided with a corresponding vacuum system branch pipe, and the vacuum system branch pipe is connected to the vacuum system main pipe through an elbow.

[0011] Furthermore, sealing rings are provided on the vacuum system main pipe and the vacuum system branch pipes.

[0012] Compared with the prior art, the utility model has the following advantages: the multi-station switching device for a vacuum refining furnace installs the elbow lifting cylinder and the mobile trolley on the platform and the track. The power of the cylinder comes from the system hydraulic station. The elbow is lifted by the lifting cylinder, and the mobile trolley drives the elbow to move along the fan-shaped track. It stops after reaching the station and touching the limit switch, and then descends to the working station through the cylinder to form a seal; the device only needs to add a fan-shaped track at the bottom of the existing platform, without the need for complex civil engineering foundations, the system structure is simple, and the space occupied is similar to that of a double-station switching elbow, but it can realize the switching of multiple stations, saving floor space, and at the same time can meet the situation where a set of vacuum systems corresponds to multiple processing stations, and each station can be switched online to save processing time and match the production rhythm. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main structure of a multi-station switching device for a vacuum refining furnace according to an embodiment of the utility model.

[0014] Figure 2 It is a left-side structural schematic diagram of a multi-station switching device for a vacuum refining furnace according to an embodiment of the utility model.

[0015] Figure 3 It is a schematic diagram of the top view of the structure of a multi-station switching device for a vacuum refining furnace according to an embodiment of the utility model.

[0016] In the figure: sector track 1, mobile trolley 2, No. 1 lifting cylinder 31, No. 2 lifting cylinder 32, universal swivel lifting ring 4, pin 5, No. 1 lifting ear 61, No. 2 lifting ear 62, elbow 7, vacuum system main pipe 8, No. 1 station 9, No. 2 station 10, No. 3 station 11, limit switch 12, sealing ring 13, vacuum system branch pipe 14. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0018] Example

[0019] See also Figures 1 to 3 As shown, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, if there are references to terms such as "upper", "lower", "left", "right", "middle" and "one" in this specification, they are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship, without substantially changing the technical content, should also be regarded as the scope of the implementation of the utility model.

[0020] The multi-station switching device for a vacuum refining furnace in this embodiment includes a fan-shaped track 1, a moving trolley 2, a No. 1 lifting cylinder 31, a No. 2 lifting cylinder 32, a rotating lifting ring 4, a pin shaft 5, a No. 1 lifting ear 61, a No. 2 lifting ear 62, an elbow 7, a vacuum system main pipe 8 and a vacuum system branch pipe 14. The No. 1 lifting ear 61 and the No. 2 lifting ear 62 are respectively arranged on both sides of the elbow 7. The vacuum system branch pipe 14 cooperates with the vacuum system main pipe 8 through the elbow 7. The vacuum system main pipe 8 and the vacuum system branch pipe 14 are both provided with sealing rings 13.

[0021] The mobile trolley 2 in this embodiment is installed on the fan-shaped track 1, the cylinder barrel of the No. 1 lifting cylinder 31 is installed on the mobile trolley 2, the piston rod of the No. 1 lifting cylinder 31 is connected to the No. 1 lifting ear 61, the cylinder barrel of the No. 2 lifting cylinder 32 is fixed, and the piston rod of the No. 2 lifting cylinder 32 is rotatably connected to the No. 2 lifting ear 62, that is, a universal rotating lifting ring 4 is installed on the piston rod of the No. 2 lifting cylinder 32, and the universal rotating lifting ring 4 is connected to the No. 2 lifting ear 62 through a pin shaft 5, and the arc center of the fan-shaped track 1 coincides with the axis of the No. 2 lifting cylinder 32.

[0022] In the present embodiment, the mobile trolley 2 has three workstations during the movement on the sector track 1. Each workstation on the sector track 1 is equipped with a limit switch 12. The three workstations are respectively the first workstation 9, the second workstation 10 and the third workstation 11. Each workstation is provided with a vacuum system branch pipe 14. The vacuum system branch pipe 14 is connected to the vacuum system main pipe 8 through an elbow 7. It should be noted that Figure 1 , 2 As described above, the mobile car 2 is at the same station in the same vertical direction during the movement. Figure 3 It can be seen that the angle between adjacent workstations is 45°.

[0023] Specifically, the mobile trolley 2 is placed on the fan-shaped track 1, the No. 1 lifting cylinder 31 is fixed on the mobile trolley 2, the No. 2 lifting cylinder 32 is fixed on the steel structure platform, and the No. 1 lifting lug 61 and the No. 2 lifting lug 62 are set on the elbow 7. The No. 1 lifting lug 61 is connected to the No. 1 lifting cylinder 31 as the rotating side, and the No. 2 lifting lug 62 is connected through the universal rotating ring 4 and the pin 5, and is suspended under the No. 2 lifting cylinder 32 as the rotating center. The cylinders 32 work together to control the lifting and lowering of the elbow 7. The vacuum system main pipe 8 is used as the rotation center and the elbow 7 is used as the rotation radius. Station No. 1 9, station No. 2 10, and station No. 3 11 are respectively set. Sealing grooves are set on the flange surfaces of the vacuum system branch pipes 14 corresponding to stations No. 1 9, station No. 2 10, and station No. 3 11 for placing sealing rings 13. Limit switches 12 are respectively set on the fan-shaped track 1 on the upper part of each station to implement feedback on the working position of the elbow 7.

[0024] It should be noted that "multiple workstations" usually refers to more than three workstations. The specific number of workstations depends on the actual situation. Here, only three workstations are used as an example, but it is not limited to three workstations. Figure 3 When the number of workstations is different, the angle between adjacent workstations can be determined according to actual conditions.

[0025] When in use, taking the switching of workstation No. 1 9 to workstation No. 2 10 as an example, after the system breaks through the air, the No. 1 lifting cylinder 31 and the No. 2 lifting cylinder 32 are driven by the system hydraulic station to lift the elbow 7 on the No. 1 workstation 9, and then the mobile trolley 2 is driven with the vacuum system main pipe 8 as the rotation center, and the elbow 7 starts to rotate along the fan-shaped track 1. When the elbow 7 rotates from the No. 1 workstation 9 to the No. 2 workstation 10 and hits the limit switch 12, the mobile trolley 2 stops driving, and the No. 1 lifting cylinder 31 and the No. 2 lifting cylinder 32 are driven again to drop the elbow 7 on the No. 2 workstation 10 onto the sealing ring 13 to form a seal. Similarly, the same is true when the No. 2 workstation 10 switches to the No. 3 workstation 11.

[0026] The multi-station switching device for a vacuum refining furnace does not require multiple double stations to be connected in series, which reduces the primary investment and basically does not require additional space for project transformation; a sealing groove is arranged on the station interface flange, and a sealing ring 13 is placed in the groove. Under the influence of the gravity of the elbow 7 and the vacuum atmospheric pressure, the sealing is reliable, and the sealing ring 13 is exposed to the outside for easy maintenance; the device only needs a moving trolley 2 and a No. 1 lifting cylinder 31 and a No. 2 lifting cylinder 32 to realize the function, and has a simple structure, which improves maintenance efficiency and reduces maintenance costs; the overall footprint is small, the structure is compact, and no complex civil engineering steel structure foundation is required, and the investment is relatively low.

[0027] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A multi-station switching device for a vacuum refining furnace, comprising a first lifting lug (61), a second lifting lug (62), an elbow (7), a vacuum system main pipe (8) and a vacuum system branch pipe (14), wherein the first lifting lug (61) and the second lifting lug (62) are respectively arranged on both sides of the elbow (7), and the vacuum system branch pipe (14) cooperates with the vacuum system main pipe (8) through the elbow (7), characterized in that: It also includes a sector track (1), a moving trolley (2), a No. 1 lifting cylinder (31) and a No. 2 lifting cylinder (32), wherein the moving trolley (2) is mounted on the sector track (1), the cylinder barrel of the No. 1 lifting cylinder (31) is mounted on the moving trolley (2), the piston rod of the No. 1 lifting cylinder (31) is connected to the No. 1 lifting ear (61), the cylinder barrel of the No. 2 lifting cylinder (32) is fixed, and the piston rod of the No. 2 lifting cylinder (32) is rotatably connected to the No. 2 lifting ear (62).

2. The multi-station switching device for a vacuum refining furnace according to claim 1, characterized in that: It also includes a universal rotating lifting ring (4) and a pin (5). The universal rotating lifting ring (4) is installed on the piston rod of the No. 2 lifting cylinder (32). The universal rotating lifting ring (4) is connected to the No. 2 lifting ear (62) via the pin (5).

3. The multi-station switching device for a vacuum refining furnace according to claim 1, characterized in that: The arc center of the sector track (1) coincides with the axis of the second lifting cylinder (32).

4. The multi-station switching device for a vacuum refining furnace according to claim 1, characterized in that: There are three workstations when the movable trolley (2) moves on the sector track (1), and a limit switch (12) is installed at each workstation on the sector track (1).

5. The multi-station switching device for a vacuum refining furnace according to claim 4 is characterized in that: The three workstations are workstation No. 1 (9), workstation No. 2 (10) and workstation No. 3 (11), and each workstation is provided with a corresponding vacuum system branch pipe (14), and the vacuum system branch pipe (14) is connected to the vacuum system main pipe (8) through an elbow (7).

6. The multi-station switching device for a vacuum refining furnace according to claim 5, characterized in that: The vacuum system main pipe (8) and the vacuum system branch pipe (14) are both provided with sealing rings (13).

Images