Airflow guiding air curtain sealing device

Abstract

The utility model relates to an airflow guiding air curtain sealing device which is arranged at a furnace door of a submerged arc furnace and comprises a furnace door frame and an air injection structure arranged on the upper side of the furnace door frame. The air spraying structure comprises air inlets and an air curtain cavity formed below the air inlets and defined by supporting plates, an adjusting plate is rotatably arranged in the air curtain cavity, the upper end of the adjusting plate is hinged to the supporting plates on the two sides of the air curtain cavity, and the lower end of the adjusting plate is limited in sliding grooves of the supporting plates on the two sides of the air curtain cavity in a sliding mode; the lower end of the adjusting plate is hinged to a telescopic rod, and the other end of the telescopic rod is hinged to the furnace door frame. According to the scheme, through rotation of the adjusting plate, adjustment of the amount of gas sprayed into the furnace door opening gas curtain by the gas spraying structure can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke sealing of submerged arc furnaces, in particular to an airflow guiding air curtain sealing device. Background Art

[0002] During the smelting operation of the submerged arc furnace, a large amount of high-temperature and hot flue gas will be generated. When the traditional furnace door is closed, its design can effectively curb the leakage of heat and flue gas, ensuring the relative stability of the furnace environment. However, once the furnace door needs to be opened to observe the internal conditions or clean the slag, the situation is completely different. At this time, the high-temperature heat and dense flue gas accumulated inside the furnace will quickly and massively spread to the working environment of the operator, which will not only seriously threaten the health of the operator, but also may have a significant impact on the surrounding air quality, leading to the aggravation of air pollution problems. Therefore, how to effectively reduce the leakage of heat and flue gas when the furnace door is opened while ensuring the smooth progress of the smelting operation has become an important issue that needs to be solved urgently.

[0003] The applicant's published patent application specification (CN111964432A) discloses a heat-resistant and smoke-isolating multifunctional electric arc furnace door, but the structure of the airflow guiding air curtain disclosed in the patent specification is fixed, so the size of the airflow guiding air curtain cannot be adjusted according to the specific smoke size, and thus the ventilation volume cannot be adjusted. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing airflow guiding air curtain structure has a fixed size and cannot be adjusted.

[0005] In order to solve the above-mentioned problems, the technical solution adopted by the utility model is an airflow-guiding air curtain sealing device, which is arranged at the furnace door of the electric arc furnace, including a furnace door frame and an injection structure, and the injection structure is arranged on the upper side of the furnace door frame; the injection structure includes: an air inlet, an air curtain cavity formed by a support plate and arranged below a plurality of the air inlets, an adjustment plate is rotatably provided in the air curtain cavity, the upper end of the adjustment plate is hinged to the support plates on both sides of the air curtain cavity, and the lower end of the adjustment plate is slidingly limited in the slide grooves of the support plates on both sides of the air curtain cavity; the lower end of the adjustment plate is hinged to the telescopic rod, and the other end of the telescopic rod is hinged to the furnace door frame.

[0006] In the above scheme, the amount of gas sprayed by the jet structure toward the air curtain at the furnace door can be adjusted by rotating the adjusting plate.

[0007] In order to facilitate the hinge connection of the adjustment plate to the support plate, as an option of the above-mentioned adjustment plate, a first hinge shaft is provided at the upper end of the adjustment plate, and a second hinge shaft is provided at the lower end of the adjustment plate; a through hole is provided at the upper part of the support plate; the first hinge shaft is rotatably installed in the through hole, and the second hinge shaft is limited in the slide groove.

[0008] To facilitate the connection between the adjusting plate and the telescopic rod, as an alternative to the above telescopic rod, the telescopic rod includes an inner rod and an outer rod nested outside the inner rod. A first hinge hole is provided at the end of the inner rod, and a second hinge hole is provided at the end of the outer rod. The first hinge hole is connected to the second hinge shaft, and the second hinge hole is hinged to the furnace door frame.

[0009] To facilitate the connection between the telescopic rod and the furnace door frame, as an alternative to the above solution, a third hinge shaft is provided on the furnace door frame, and the second hinge hole is connected to the third hinge shaft.

[0010] In the above solution, optionally, the telescopic rod is any one of a hydraulic cylinder, an electric cylinder, and a pneumatic cylinder.

[0011] To control the above sealing device, the sealing device further includes a master control module, and the telescopic rod is electrically connected to the master control module.

[0012] To facilitate the sliding of the adjusting plate in the chute, as an improvement to the above solution, a roller is provided at the connection between the second hinge shaft and the chute, and the roller can slide in the chute.

[0013] The advantages of the present utility model compared with the prior art are as follows: In this application, an adjusting plate structure is added. The adjusting plate is arranged inside the air curtain cavity of the air flow guiding air curtain sealing device. The adjusting plate is driven by the telescopic rod to swing, and through the control module, the elongation length of the telescopic rod can be adaptively adjusted according to the actual size of the flue gas, thereby controlling the size of the air curtain. Description of the Drawings

[0014] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0015] Figure 1 It is a three-dimensional view of the overall structure of a submerged arc furnace in an air flow guiding air curtain sealing device applying this application.

[0016] Figure 2 It is a schematic diagram of an air flow guiding air curtain sealing device of the present utility model.

[0017] Figure 3 For Figure 2 The enlarged view at a in

[0018] Figure 4 For Figure 2 The partial bearing cross-sectional view at a in

[0019] Figure 5 For Figure 2Partial cross-sectional view of side view at position a

[0020] Description of reference numerals:

[0021] 100, submerged arc furnace; 10, furnace door;

[0022] 1, furnace door frame; 11, third hinge shaft;

[0023] 2, jet structure; 21, air inlet; 23, support plate; 22, air curtain chamber; 231, chute; 232, through hole;

[0024] 3, adjusting plate; 31, first hinge shaft; 32, second hinge shaft;

[0025] 4, telescopic rod; 41, inner rod; 42, outer rod; 411, first hinge hole; 421, second hinge hole. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In order to solve the existing problems proposed in the background art. The present invention provides an air flow guiding air curtain sealing device, which is particularly applicable to the furnace door of a submerged arc furnace to effectively reduce the leakage of high-temperature heat and flue gas when the furnace door is opened, and ensure the health of operators and the air quality of the surrounding environment.

[0028] As Figure 1 schematically shows a schematic diagram of the submerged arc furnace 100 to which the air flow guiding air curtain sealing device of the present application is applied. The furnace door 10 is included in the figure, and the air flow guiding air curtain sealing device is arranged at the furnace door 10.

[0029] As Figure 2 ~ schematically shows that the air flow guiding air curtain sealing device of the present invention mainly includes a furnace door frame 1 and a jet structure 2. The furnace door frame 1 serves as the support frame of the entire device and is fixed at the opening of the submerged arc furnace. The jet structure 2 is arranged on the upper side of the furnace door frame 1 to form a barrier to block the diffusion of heat and flue gas when the furnace door is opened.

[0030] The starting part of the jet structure 2 is the air inlet 21, which is designed in multiple numbers to ensure an adequate supply of high-pressure gas. The air inlet 21 can be connected to the factory power station (not used in the figure) or to an air compressor (schematically shown in the figure). The air inlet 21 is enclosed by a support plate 23 below to form an air curtain cavity 22. The air curtain cavity 22, as a key area for gas guidance, needs to have its shape and size adjusted according to the specific size of the furnace door to ensure the coverage and sealing effect of the air curtain.

[0031] An adjusting plate 3 is rotatably arranged in the air curtain cavity 22, and this adjusting plate 3 is used to adjust the width of the air curtain according to actual needs. The upper end of the adjusting plate 3 is hinged to the support plates 23 on both sides of the air curtain cavity 22 through a first hinge shaft 31. Specifically, through holes 232 are opened in the upper part of the support plates 23, and the first hinge shaft 31 passes through the through holes 232 to achieve a rotational connection. The lower end of the adjusting plate 3 is slidably limited in the chute 231 of the support plate 23 through a second hinge shaft 32, allowing the adjusting plate 3 to move within a certain range to adjust the opening size of the air curtain.

[0032] To drive the movement of the adjusting plate 3, the present utility model adopts a telescopic rod 4. One end of the telescopic rod 4 is hinged to the lower end of the adjusting plate 3 through the second hinge shaft 32, and the other end is hinged to the furnace door frame 1.

[0033] Specifically, the telescopic rod 4 is composed of an inner rod 41 and an outer rod 42. A first hinge hole 411 is provided at the end of the inner rod 41, and a second hinge hole 421 is provided at the end of the outer rod 42 to achieve the hinged connection with the adjusting plate 3 and the furnace door frame 1. A third hinge shaft 11 is provided on the furnace door frame 1, and the second hinge hole 421 is fixedly connected to the furnace door frame 1 through the third hinge shaft 11.

[0034] The telescopic rod 4 can be any one of a hydraulic cylinder, an electric cylinder, or a pneumatic cylinder. The specific selection depends on the actual working environment and requirements. To achieve precise control of the telescopic rod 4, the present utility model also adds a total control module, which is electrically connected to the telescopic rod 4 and can automatically adjust the telescopic length of the telescopic rod 4 according to preset parameters or the detected flue gas concentration in the furnace in real time, thereby dynamically adjusting the width and density of the air curtain to achieve the best heat and smoke blocking effect.

[0035] To further improve the smoothness of the movement of the adjusting plate 3 in the chute 231, the present utility model can also set rollers at the connection between the second hinge shaft 32 and the chute 231. The rollers slide in the chute 231, which can effectively reduce friction and improve the adjustment efficiency and stability.

[0036] In practical applications, when the submerged arc furnace needs to open the furnace door for observation or operation, the operator can control the start of the jet structure 2 through the master control module (not shown in the figure), and according to the actual situation of the flue gas in the furnace, the master control module controls and adjusts the length of the telescopic rod 4, and then controls and adjusts the position of the adjusting plate 3 to form a suitable air flow guiding air curtain. This air curtain can effectively block the leakage of high-temperature heat and flue gas in the furnace, protecting the safety and cleanliness of the operator and the surrounding environment.

[0037] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and without departing from the gist of the creation of the present invention, they design similar structural manners and embodiments to this technical solution without creative efforts, which shall fall within the protection scope of the present invention.

Claims

1. An airflow guiding air curtain sealing device, arranged at the door of a submerged arc furnace, characterized in that: It comprises a furnace door frame (1) and an air injection structure (2), wherein the air injection structure (2) is arranged on the upper side of the furnace door frame (1); The jet structure (2) comprises: an air inlet (21), an air curtain cavity (22) formed by being arranged below a plurality of the air inlets (21) and surrounded by a support plate (23), an adjustment plate (3) being rotatably arranged in the air curtain cavity (22), the upper end of the adjustment plate (3) being hinged to the support plates (23) on both sides of the air curtain cavity (22), and the lower end of the adjustment plate (3) being slidingly limited in the slide grooves (231) of the support plates (23) on both sides of the air curtain cavity (22); The lower end of the adjustment plate (3) is hinged to the telescopic rod (4), and the other end of the telescopic rod (4) is hinged to the furnace door frame (1).

2. The airflow guiding air curtain sealing device according to claim 1, characterized in that: The upper end of the adjustment plate (3) is provided with a first hinge shaft (31), and the lower end of the adjustment plate (3) is provided with a second hinge shaft (32); The upper portion of the support plate (23) is provided with a through hole (232); The first hinge shaft (31) is rotatably mounted in the through hole (232), and the second hinge shaft (32) is limited in the sliding groove (231).

3. The airflow guiding air curtain sealing device according to claim 2, characterized in that: The telescopic rod (4) comprises an inner rod (41) and an outer rod (42) nested outside the inner rod (41); a first hinge hole (411) is arranged at the end of the inner rod (41); a second hinge hole (421) is arranged at the end of the outer rod (42); the first hinge hole (411) is connected to the second hinge shaft (32); and the second hinge hole (421) is hinged to the furnace door frame (1).

4. The airflow guiding air curtain sealing device according to claim 3, characterized in that: A third hinge shaft (11) is arranged on the furnace door frame (1), and the second hinge hole (421) is connected to the third hinge shaft (11).

5. The airflow guiding air curtain sealing device according to any one of claims 1 to 4, characterized in that: The telescopic rod (4) is any one of a hydraulic cylinder, an electric cylinder and a pneumatic cylinder.

6. The airflow guiding air curtain sealing device according to any one of claims 1 to 4, characterized in that: The sealing device also includes a master control module, and the telescopic rod (4) is electrically connected to the master control module.

7. The airflow guiding air curtain sealing device according to claim 2, characterized in that: A roller is provided at the connection between the second hinge shaft (32) and the slide groove (231), and the roller can slide in the slide groove (231).

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