VD vacuum system observation window purging air curtain structure
By spraying argon gas on the observation window of the VD vacuum system to form an airflow, preventing smoke from adhering and cooling, the problem of obstruction and short service life of the observation window is solved, extending the service life of the glass, reducing safety risks and replacement costs, and improving the Productivity.
Patent Information
- Application Number
- CN202421024623.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-13
AI Technical Summary
During the VD vacuum smelting process, the observation window is easily blocked by smoke and dust in high vacuum and high temperature environments, affecting the line of sight, and the service life of the glass is short, which increases the cost of use.
A VD vacuum system observation window purge gas curtain structure is designed, which forms an airflow by spraying argon gas on the surface of the observation window glass, prevents smoke from adhesion, and cools through argon gas to extend the service life of the glass. The structure includes the viewing window body, an annular air pipe, a nozzle, an argon hose and a ventilation valve, which blows toward the glass surface during the blowing process to form airflow protection and closes the ventilation valve at the end.
Effectively prevent smoke and dust from adhering, extend the service life of observation window glass, reduce safety risks, improve dehydrogenation efficiency, reduce replacement costs, and ensure stable production.
Smart Images
Figure CN222226438U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of VD vacuum refining, in particular to a VD vacuum system observation window purge air curtain structure. Background Art
[0002] With the rapid development of steelmaking technology and the continuous development of new products, traditional steelmaking technology has been far behind the changes in market demand. Special steel with high added value and product competitiveness has become the mainstream of the market, but special steel has very strict requirements on the gas content and inclusions in the steel billet. In order to effectively remove the gas and inclusion content in molten steel, VD vacuum smelting technology came into being.
[0003] During the VD smelting process, the observation window on the vacuum tank cover plays a very important role. It enables the process personnel to observe the state of the molten steel reaction in the vacuum system at all times, and is convenient for the process personnel to adjust the argon blowing amount in time to avoid molten steel splashing caused by violent reaction, reduce safety risks, and improve dehydrogenation efficiency.
[0004] However, during the vacuum process, when the vacuum degree reaches 20Kpa, the reaction in the furnace reaches its maximum. At this time, a large amount of smoke and dust overflows to the observation hole and adheres to the inner surface of the quartz glass, almost blocking the observation window, seriously affecting the line of sight. The process personnel cannot observe the state of the molten steel in time, and it is very easy to cause splashing, overflowing steel and other accidents to affect production.
[0005] In addition, in a high temperature environment, the observation window glass is affected by the thermal radiation of molten steel. The temperature during production can reach over 800°C. The service life of the observation window glass will be greatly affected if it works in a high temperature environment for a long time, resulting in an increase in the cost of use. Utility Model Content
[0006] In view of the deficiencies of the prior art, the utility model provides a VD vacuum system observation window purge air curtain structure, which overcomes the deficiencies of the prior art and effectively solves the problem of observation window being blocked, seriously affecting the line of sight and causing increased use costs.
[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0008] A VD vacuum system observation window purge air curtain structure comprises an observation window body, an outer wall of one side of the observation window body is fixedly connected with a sealing cover by bolts, and an annular air pipe is arranged inside the observation window body, and nozzles distributed at equal distances are installed on the outer wall of the annular air pipe, a fixed long tube is welded to the outer wall of the bottom of the annular air pipe, and a butt joint is welded to the outer wall of one end of the fixed long tube, an argon hose is screwed on the inner wall of the butt joint, and a ventilation valve is installed on the outer wall of the argon hose.
[0009] Preferably, a quartz glass plate is provided on the outer wall of one side of the observation window body, and the nozzle is provided on one side of the quartz glass plate. A pressure cover is fixedly connected to the outer wall of one side of the sealing cover by bolts, and the pressure cover is tightly attached to the other side of the quartz glass plate.
[0010] Preferably, a flange sleeve is welded to the outer wall on the other side of the observation window body.
[0011] Preferably, a long groove is formed on an outer wall of one side of the observation window body, and a fixed long tube is arranged inside the long groove.
[0012] Preferably, a sealing groove is provided on the outer wall of the bottom of the observation window body, and a sealing gasket is bonded to the inner wall of the sealing groove, and the fixed long tube penetrates and is connected to the inner wall of the sealing gasket.
[0013] Preferably, a fixing block is welded to the outer wall of the bottom of the observation window body, and the fixed long tube is fixedly connected to the inner wall of the fixing block.
[0014] Preferably, a first tie rod and a second tie rod are welded to the observation window body and the outer wall of the top of the sealing cover respectively.
[0015] The beneficial effects of the utility model are:
[0016] 1. The purge air curtain structure of the observation window of the VD vacuum system designed in this paper, when the air hole of the nozzle faces the quartz glass plate, argon gas can be sprayed to the observation window glass and form an airflow on the glass surface, so that the protective effect of the airflow disturbance on the glass surface effectively prevents the smoke and dust from adhering to its surface. Due to the introduction of inert gas argon, it has both a purge effect and a cooling effect, and will not affect the inclusion of molten steel components and gas content, reducing the impact on production operations;
[0017] 2. The VD vacuum system observation window purge air curtain structure designed in this paper can greatly increase the service life of the observation window glass, reduce safety risks, improve dehydrogenation efficiency, ensure smooth production, greatly reduce replacement costs, and shorten production replacement intervals through the application of this device. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a front view of the overall structure of a VD vacuum system observation window purge air curtain structure proposed by the utility model;
[0019] Figure 2 This is a bottom view of the overall structure of a VD vacuum system observation window purge air curtain structure proposed by the utility model;
[0020] Figure 3 This is a schematic diagram of the overall structure of a VD vacuum system observation window purge air curtain structure proposed by the utility model;
[0021] Figure 4The utility model provides a schematic diagram of the circular air pipe connection structure of the purge air curtain structure of the VD vacuum system observation window.
[0022] In the figure: 1. Observation window body; 2. Sealing cover; 3. Circular air pipe; 4. Nozzle; 5. Fixed long tube; 6. Butt joint; 7. Argon hose; 8. Ventilation valve; 9. Quartz glass plate; 10. Pressure cover; 11. Flange sleeve; 12. Long groove; 13. Sealing gasket; 14. Fixed block; 15. First pull rod; 16. Second pull rod. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0024] Embodiment 1, refer to Figures 1 to 4 A VD vacuum system observation window purge air curtain structure includes an observation window body 1, an outer wall of one side of the observation window body 1 is fixedly connected with a sealing cover 2 by bolts, and a circular air pipe 3 is arranged inside the observation window body 1, and nozzles 4 distributed at equal distances are installed on the outer wall of the circular air pipe 3.
[0025] In this embodiment, when the air hole of the nozzle 4 faces the quartz glass plate 9, argon gas can be sprayed out and blown toward the observation window glass, and an airflow is formed on the glass surface, so that the protective effect of the airflow disturbance on the glass surface effectively prevents smoke and dust from adhering to its surface. Since the inert gas argon is introduced, it has both a purging effect and a cooling effect, and will not affect the inclusions and gas content of the molten steel, thereby reducing the impact on production operations.
[0026] Example 2, refer to Figure 4 A VD vacuum system observation window purge air curtain structure, a fixed long tube 5 is welded to the outer wall of the bottom of the circular air pipe 3, and a butt joint 6 is welded to the outer wall of one end of the fixed long tube 5, an argon hose 7 is screwed on the inner wall of the butt joint 6, and a vent valve 8 is installed on the outer wall of the argon hose 7.
[0027] In this embodiment, through the application of this device, the service life of the observation window glass can be greatly increased, the safety risk can be reduced, the dehydrogenation efficiency can be improved, the production can be guaranteed to be smooth, the replacement cost can be greatly reduced, and the production replacement interval can be shortened.
[0028] Reference Figures 3 to 4 A quartz glass plate 9 is arranged on the outer wall of one side of the observation window body 1, and the nozzle 4 is arranged on one side of the quartz glass plate 9. A pressure cover 10 is fixedly connected to the outer wall of one side of the sealing cover 2 by bolts, and the pressure cover 10 is tightly attached to the other side of the quartz glass plate 9.
[0029] Reference Figure 3A flange sleeve 11 is welded to the outer wall of the other side of the observation window body 1.
[0030] Reference Figures 3 to 4 A long groove 12 is formed on the outer wall of one side of the observation window body 1 , and the fixed long tube 5 is arranged inside the long groove 12 .
[0031] Reference Figures 2 to 4 A sealing groove is provided on the outer wall of the bottom of the observation window body 1 , and a sealing gasket 13 is bonded to the inner wall of the sealing groove, and the fixed long tube 5 penetrates and is connected to the inner wall of the sealing gasket 13 .
[0032] Reference Figures 2 to 4 A fixing block 14 is welded to the outer wall of the bottom of the observation window body 1 , and the fixed long tube 5 is fixedly connected to the inner wall of the fixing block 14 .
[0033] Reference Figure 1 A first tie rod 15 and a second tie rod 16 are welded to the outer wall of the top of the observation window body 1 and the sealing cover 2, respectively.
[0034] Working principle: install the device inside the observation window body 1, make the air hole of the nozzle 4 face the quartz glass plate 9, seal the joint well and connect the argon hose 7 to the lower end of the joint 6 to form a complete gas path. During production, the process personnel manually open the ventilation valve 8 to connect the purge device with the low-pressure argon gas. At this time, the argon gas is ejected from the device to the quartz glass plate 9 and forms a disturbed airflow on the glass surface. When the reaction is violent in the middle stage of blowing and a large amount of smoke and dust gas overflows, the protective effect of the airflow disturbance on the glass surface effectively prevents the smoke and dust from adhering to its surface. After the blowing is completed, close the ventilation valve 8.
[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A VD vacuum system observation window purge air curtain structure, comprising an observation window body (1), characterized in that: The outer wall of one side of the observation window body (1) is fixedly connected with a sealing cover (2) by means of bolts, and a circular air pipe (3) is arranged inside the observation window body (1), and nozzles (4) are installed on the outer wall of the circular air pipe (3) at equal distances, a fixed long tube (5) is welded to the outer wall of the bottom of the circular air pipe (3), and a butt joint (6) is welded to the outer wall of one end of the fixed long tube (5), an argon hose (7) is screwed to the inner wall of the butt joint (6), and a ventilation valve (8) is installed on the outer wall of the argon hose (7).
2. A VD vacuum system observation window purge air curtain structure according to claim 1, characterized in that: A quartz glass plate (9) is provided on the outer wall of one side of the observation window body (1), and the nozzle (4) is provided on one side of the quartz glass plate (9). A pressure cover (10) is fixedly connected to the outer wall of one side of the sealing cover (2) by bolts, and the pressure cover (10) is tightly attached to the other side of the quartz glass plate (9).
3. A VD vacuum system observation window purge air curtain structure according to claim 1, characterized in that: A flange sleeve (11) is welded to the outer wall of the other side of the observation window body (1).
4. A VD vacuum system observation window purge air curtain structure according to claim 1, characterized in that: A long groove (12) is provided on the outer wall of one side of the observation window body (1), and a fixed long tube (5) is arranged inside the long groove (12).
5. A VD vacuum system observation window purge air curtain structure according to claim 1, characterized in that: The bottom outer wall of the observation window body (1) is provided with a sealing groove, and a sealing gasket (13) is bonded to the inner wall of the sealing groove, and the fixed long tube (5) penetrates and is connected to the inner wall of the sealing gasket (13).
6. A VD vacuum system observation window purge air curtain structure according to claim 1, characterized in that: A fixing block (14) is welded to the outer wall of the bottom of the observation window body (1), and the fixing long tube (5) is fixedly connected to the inner wall of the fixing block (14).
7. A VD vacuum system observation window purge air curtain structure according to claim 1, characterized in that: The observation window body (1) and the top outer wall of the sealing cover (2) are respectively welded with a first pull rod (15) and a second pull rod (16).