Tundish cover

Abstract

The utility model discloses a tundish cover, and belongs to the technical field of tundish manufacturing. The ladle cover comprises a ladle cover body and an auxiliary hole formed in the ladle cover body. The ladle cover body comprises a frame defined by steel plates, a steel structure part and a refractory material part, wherein the steel structure part and the refractory material part are arranged in the frame. Wherein the steel structure part comprises anchoring parts and connecting ribs, and anti-expansion gaps are formed in the frame along the periphery of the frame. Through the arrangement of the anti-expansion gaps and the reinforcement of the steel structure part, the casting times of the ladle cover can be prolonged to 16 times from the original 8 times, and the service life of the ladle cover is greatly prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of tundish manufacturing, and more specifically relates to a tundish cover. Background Art

[0002] The tundish is the main equipment in the continuous casting process. It plays a connecting role, receiving molten steel from the ladle and supplying molten steel to the continuous casting machine. In the process of receiving molten steel, the molten steel will produce a lot of splashes and smoke. The tundish cover prevents the molten steel from splashing out of the ladle, preventing smoke and preventing a large amount of heat loss of the molten steel.

[0003] The ladle cover is usually composed of a steel structure shell and internal refractory castings. However, due to the extremely harsh working conditions of the tundish cover (molten steel temperature reaches over 1500 degrees), the steel structure will deform after a certain number of uses, causing the internal refractory material to fall off. The fallen refractory moves with the steel flow to the tundish water outlet, affecting the quality of the molten steel and posing a risk of flow blockage. Therefore, how to improve the service life of the ladle cover is an urgent problem to be solved in the industry.

[0004] For example, in the patent CN103252483A, the body is divided into three layers: upper, middle and lower. The lower layer is a heavy castable layer, the thickness of which is 50%-70% of the thickness of the body, the middle layer is a light castable layer, the thickness of which is 20%-40% of the thickness of the body, the upper layer is a heat preservation layer, and the upper part of the body is wrapped with a shell. This can effectively prevent the deformation of the cover shell and save energy.

[0005] In the patent CN206185133U, a layer of high temperature resistant material (refractory material) with a thickness of 120mm to 180mm is added inside the ladle cover, and the refractory castable is poured into a whole through nails and grids. This can effectively prevent the steel plate from warping due to thermal deformation and the refractory material from falling off, thus extending the service life of the ladle cover.

[0006] For example, in the patent CN109396407A, an arch bridge design style is adopted, and the working surface and the surface are designed in an arc shape. The favorable arc curve design increases the stress relief and release ability of the refractory castable prefabricated part of the cover body to suppress the deformation of the cover.

[0007] The above applications all involve technical improvements to extend the service life of the bag cover, but there is still room for optimization, and research in the industry to increase the service life of the bag cover has never stopped. Utility Model Content

[0008] 1. Problems to be solved

[0009] In view of the problem in the prior art that the cover is easily deformed after being heated, thus affecting its service life, the utility model provides a tundish cover. The tundish cover of the utility model enhances the anti-deformation ability of the tundish cover through the design of expansion joints, which is conducive to extending its service life.

[0010] 2. Technical solution

[0011] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0012] The utility model discloses a tundish cover, comprising a cover body and a process hole opened on the cover body, wherein the cover body comprises a frame surrounded by steel plates, and a steel structure part and a refractory material part arranged in the frame;

[0013] Wherein, the steel structure part includes anchors and connecting ribs, and the frame is provided with anti-expansion joints along its four sides.

[0014] Furthermore, the anti-expansion joint is arranged obliquely and passes through the corresponding side wall of the frame.

[0015] Furthermore, the width of the anti-expansion joint is 3-8 mm, and the distance between two adjacent anti-expansion joints on the same side wall is 200 mm-500 mm.

[0016] Furthermore, the inclination angle α of the anti-expansion joint is less than 45 degrees, and the overall inclination direction of the anti-expansion joint is consistent.

[0017] Furthermore, the cover body is composed of three parts, namely a first part located in the middle, and a second part and a third part located on both sides of the first part, and a reinforcing plate is arranged in the first part.

[0018] Furthermore, the distribution density of the anti-expansion joints on the first portion is greater than that on the two side portions.

[0019] Furthermore, the process holes include baking holes and stopper rod holes, and the baking holes and the stopper rod holes are alternately distributed along the length direction of the cover body.

[0020] Furthermore, a ventilation duct is provided in the package cover body, and the inlet and outlet of the ventilation duct are respectively located on both sides of the package cover body.

[0021] Furthermore, an inert gas pipeline is provided in the cover body, and a plurality of gas outlet holes are provided on the inert gas pipeline.

[0022] Furthermore, the frame is provided with a slot which cooperates with the opening of the middle bag.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] (1) The utility model discloses a tundish cover, wherein the interior of the frame is cast as a whole by means of a steel structure and refractory materials, thereby ensuring the overall strength and refractory performance of the cover body; at the same time, by providing anti-expansion joints around the frame, the deformation resistance of the tundish cover can be enhanced, thereby preventing the tundish cover from being deformed due to thermal expansion and causing the castable to fall off, thereby helping to extend the service life and safety of the cover.

[0026] (2) In the utility model, a tundish cover is provided with a reinforcing plate in the middle part of the cover, because the middle part of the cover is most affected by high temperature, so as to improve the strength of the steel structure in the middle part, thereby extending the service life of the entire cover and saving costs.

[0027] (3) A tundish cover of the utility model is provided with a ventilation duct, through which natural wind can naturally cool the cover; at the same time, inert gas is introduced into the cover through the inert gas duct for forced cooling, thereby lowering the temperature of the cover and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a tundish cover of the utility model;

[0029] Figure 2 This is a front view of a tundish cover of the utility model;

[0030] Figure 3 for Figure 1 A local enlarged schematic diagram of the middle A;

[0031] Figure 4 for Figure 1 A local enlarged schematic diagram of point B in the middle.

[0032] In the figure: 1, cover body; 11, frame; 12, anchor; 13, connecting rib; 14, reinforcing plate; 15, slot;

[0033] 2. Process hole; 21. Baking hole; 22. Stopper hole;

[0034] 3. Anti-expansion joint; 4. Ventilation duct; 5. Inert gas duct. DETAILED DESCRIPTION

[0035] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] The utility model is further described below in conjunction with specific embodiments.

[0038] like Figure 1 , Figure 2 As shown, a tundish cover of the present embodiment includes a cover body 1 and a process hole 2 opened on the cover body 1 .

[0039] The cover body 1 comprises a frame 11 surrounded by steel plates, and the interior of the frame 11 is cast as a whole through steel structure parts and refractory materials to ensure the overall strength and high temperature resistance of the cover body 1.

[0040] The process holes 2 include baking holes 21 and stopper holes 22 , and the baking holes 21 and stopper holes 22 are alternately distributed along the length direction of the cover body 1 .

[0041] The frame 11 is provided with anti-expansion joints 3 along its four sides. Through the setting of the anti-expansion joints 3, the thermal expansion of the cover can be absorbed to a certain extent, and the plastic deformation capacity of the cover can be enhanced, which is beneficial to extending the service life of the cover; at the same time, a series of problems caused by the falling off of refractory materials can be effectively prevented.

[0042] Specifically, Figure 3 As shown, a plurality of anti-expansion joints 3 are provided along the length direction of the side wall of the frame 11, and a single anti-expansion joint 3 is a thin joint opened along the height direction of the side wall of the frame 11 and penetrating the side wall.

[0043] In this embodiment, although the anti-expansion joint 3 can effectively improve the deformation resistance of the cover, it also reduces the structural strength of the frame 11.

[0044] In order to balance the structural strength of the frame 11 and the anti-deformation ability of the anti-expansion joint 3, in this embodiment, the opening width of the anti-expansion joint 3 (the distance along the length direction of the frame) is 3-8mm, for example, 4mm, 5mm, 7mm, etc.; and the opening length of the anti-expansion joint 3 (the distance along the height direction of the frame) does not exceed 1 / 2 of the height of the side wall of the frame 11.

[0045] At the same time, the distance between two adjacent anti-expansion joints 3 on the same side wall is 200 mm-500 mm, for example, 250 mm, 350 mm, 450 mm, etc.

[0046] Specifically in this embodiment, the width of the anti-expansion joint 3 is 5 mm, and the distance between two adjacent anti-expansion joints 3 is 300 mm.

[0047] Furthermore, the anti-expansion joints 3 are arranged at an inclination, and the inclination direction of each anti-expansion joint 3 is consistent. Preferably, the inclination angle α is less than 45 degrees.

[0048] In this embodiment, the cover body 1 can be regarded as three parts, namely a first part located in the middle, and a second part and a third part located on both sides of the first part.

[0049] Since the first part is most seriously affected by the high temperature, the service life of this part often determines the service life of the entire cover. Therefore, in this embodiment, the structure of this part is strengthened to further improve its anti-deformation ability and extend its service life.

[0050] Specifically, refer to Figure 3 , Figure 4 The steel structure part includes anchors 12 and connecting ribs 13 arranged in a staggered manner. A reinforcing plate 14 is also provided in the first part, and the reinforcing plate 14 is arranged along the width direction of the frame 11 to strengthen the steel structure strength of the first part.

[0051] At the same time, the distribution density of the anti-expansion joints 3 on the frame of the first part is greater than that of the two side parts. In other words, the spacing between the anti-expansion joints 3 on the frame of the first part is greater than the spacing between the anti-expansion joints 3 on the two side parts, so that the first part has better anti-deformation ability.

[0052] In order to further reduce the influence of high temperature on the package cover and extend its service life, in this embodiment, a ventilation duct 4 and an inert gas duct 5 are provided in the package cover body 1 .

[0053] There are multiple groups of ventilation ducts 4 , and the inlets and outlets thereof are respectively located on the two long side walls of the bag cover body 1 , so that natural wind can cool the bag cover through the ventilation ducts 4 .

[0054] The inert gas pipeline 5 is arranged along the length direction of the cladding body 1. The portion of the inert gas pipeline 5 located inside the cladding body 1 is provided with a plurality of gas outlets, and the gas inlet is arranged on the short side wall of the cladding body 1. Inert gas is introduced into the cladding through the gas inlet for forced cooling, so as to further reduce the temperature of the cladding to extend the service life.

[0055] In addition, the frame 11 is also provided with a slot 15 and a lug (not shown in the figure). The slot 15 is provided at the four corners of the frame 11 to cooperate with the opening of the middle bag to ensure the sealing effect between the two, improve the thermal insulation performance and reduce heat loss.

[0056] The lifting ears are arranged on two long side walls of the frame 11, and two groups are symmetrically arranged to facilitate the lifting operation of the entire bag cover.

[0057] The tundish cover of the present embodiment can significantly prolong the service life of the cover by providing the anti-expansion joint 3 and strengthening the steel structure part, so that the original 8 pouring times can be extended to the current 16 times.

[0058] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A tundish cover, comprising a cover body (1) and a process hole (2) provided on the cover body (1), characterized in that: The cover body (1) comprises a frame (11) surrounded by steel plates, and a steel structure part and a refractory material part arranged in the frame (11); The steel structure part includes anchors (12) and connecting ribs (13), and the frame (11) is provided with anti-expansion joints (3) along its periphery.

2. The tundish cover according to claim 1, characterized in that: The anti-expansion joint (3) is arranged obliquely and passes through the corresponding side wall of the frame (11).

3. The tundish cover according to claim 2, characterized in that: The width of the anti-expansion joint (3) is 3-8 mm, and the distance between two adjacent anti-expansion joints (3) on the same side wall is 200 mm-500 mm.

4. The tundish cover according to claim 3, characterized in that: The inclination angle α of the anti-expansion joint (3) is less than 45 degrees, and the overall inclination direction of the anti-expansion joint (3) is consistent.

5. A tundish cover according to any one of claims 1 to 4, characterized in that: The cover body (1) is composed of three parts, namely a first part located in the middle, and a second part and a third part located on both sides of the first part. A reinforcing plate (14) is arranged in the first part.

6. The tundish cover according to claim 5, characterized in that: The distribution density of the anti-expansion joints (3) on the first part is greater than that on the two side parts.

7. The tundish cover according to claim 5, characterized in that: The process holes (2) include baking holes (21) and stopper holes (22), and the baking holes (21) and stopper holes (22) are alternately distributed along the length direction of the cover body (1).

8. A tundish cover according to any one of claims 1 to 4, characterized in that: A ventilation duct (4) is provided inside the package cover body (1), and the inlet and outlet of the ventilation duct (4) are respectively located on both sides of the package cover body (1).

9. The tundish cover according to claim 8, characterized in that: An inert gas pipeline (5) is also provided in the cover body (1), and a plurality of gas outlet holes are provided on the inert gas pipeline (5).

10. The tundish cover according to claim 8, characterized in that: The frame (11) is provided with a clamping groove (15) which cooperates with the opening of the tundish.

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