A flow-controllable thin strip continuous casting distributor

Abstract

The utility model relates to thin strip continuous casting technical field, concretely relates to a thin strip continuous casting cloth flow ware of controllable flow, this thin strip continuous casting cloth flow ware includes buffer tank and cloth flow tank, and the buffer tank includes liquid steel tank body and the outlet tank body, is equipped with liquid steel tank on liquid steel tank body, is equipped with outlet tank and flow control mouth on outlet tank body, cloth flow tank includes cloth flow tank body, buffer overflow tank and flow control plug head, overflow mouth is equipped on cloth flow tank body and / or buffer overflow tank, realizes the control of flow through the adjustment of the relative position of flow control plug head and flow control mouth and overflow mouth, simple structure, and can effectively realize flow control.

Description

Technical Field

[0001] This utility model relates to the field of thin strip continuous casting technology, specifically to a thin strip continuous casting flow distributor with controllable flow rate. Background Technology

[0002] The principle of thin strip continuous casting technology is to directly pour molten steel between a pair of counter-rotating, internally water-cooled crystallizing rolls. The molten pool exists in a closed space composed of two side sealing plates and the roll surface. The molten steel solidifies between the two rolls to form a thin strip. Compared with traditional continuous casting processes, thin strip continuous casting technology has advantages such as shorter process, lower production cost, energy saving, and environmental protection. It can directly cast and roll molten steel into strips with a thickness of 0.5-6mm without reheating. The thin strip continuous casting process is a sub-rapid solidification process of metal. In this process, the key technical point is to evenly distribute the molten steel into the narrow twin-roll molten pool, i.e., how to achieve reasonable flow distribution. Instability in the casting of thin strips during production is often caused by excessive fluctuations in the liquid level within the molten pool. At the same time, if the flow of molten steel in the molten pool is uneven or insufficient, it will lead to poor surface quality of the cast strip, uneven thickness, and in severe cases, strip breakage, thus seriously affecting the production process.

[0003] Unlike traditional continuous casting, in thin strip continuous casting, the molten steel flows into a buffer (some processes do not have a buffer) in the tundish before flowing into a distributor to reduce problems such as liquid level fluctuations and splashing. Traditional continuous casting uses the method of immersing the tundish nozzle into the molten pool, and the flow rate can be directly controlled from the tundish nozzle through methods such as stoppers. The flow rate change can directly affect the molten pool. However, in the thin strip continuous casting process, the flow control and the molten pool need to go through steps such as buffers and distributors, which is not timely. Therefore, a thin strip continuous casting distributor with flow control is designed to solve the problems existing in the current technology. Utility Model Content

[0004] The purpose of this utility model is to provide a simplified and controllable flow distributor for thin strip continuous casting. The specific technical solution is as follows: A flow distributor for thin strip continuous casting with controllable flow rate includes a buffer tank and a flow distribution tank. The buffer tank includes a molten steel tank body and a discharge trough body. The molten steel tank body is provided with a molten steel tank, and the discharge trough body is provided with a discharge trough and a flow control port connected to the discharge trough. The molten steel tank and the discharge trough are connected. The flow distribution channel includes a flow distribution channel body, a buffer overflow channel, and a flow control plug. The flow distribution channel body and the buffer overflow channel are connected to form a receiving cavity. The flow control plug is disposed on the inner wall of the receiving cavity and matches the flow control port. The flow distribution channel body and / or the buffer overflow channel are provided with an overflow port. The flow rate is controlled by adjusting the relative position of the flow control plug and the flow control port in combination with the overflow port.

[0005] This utility model discloses a flow distributor for thin strip continuous casting with controllable flow rate, comprising a buffer tank and a flow distribution tank. The buffer tank includes a molten steel tank body and a discharge trough body. The molten steel tank body is provided with a molten steel trough, and the discharge trough body is provided with a discharge trough and a flow control port. The flow distribution tank includes a flow distribution tank body, a buffer overflow tank, and a flow control plug. The flow distribution tank body and / or the buffer overflow tank are provided with an overflow port. Flow rate control is achieved by adjusting the relative position of the flow control plug and the flow control port in conjunction with the overflow port. The structure is simple and can effectively achieve flow rate control.

[0006] Preferably, the flow distribution channel and the buffer overflow channel are arranged vertically; the overflow port is located at the lower end of the side wall of the buffer overflow channel. The steel outlet channel is inserted into the receiving cavity, and the relative position of the flow control plug and the flow control port is adjusted as needed to regulate the amount of molten steel flowing into the receiving cavity, which then flows out through the overflow port into the molten pool, further precisely controlling the flow rate of the molten steel.

[0007] Preferably, the overflow outlet includes a front buffer overflow outlet and side buffer overflow outlets spaced apart from the front buffer overflow outlet. More preferably, the number of front buffer overflow outlets is at least two spaced apart; the number of side buffer overflow outlets is at least two spaced apart. The design of multiple front buffer overflow outlets and multiple side buffer overflow outlets facilitates the uniform entry of molten steel into the molten pool.

[0008] Preferably, the flow distribution channel is provided with a support, which allows the flow distribution channel to be controlled in height by auxiliary equipment, thereby adjusting the relative position of the flow control plug and the flow control port, and facilitating automated control of the molten steel volume.

[0009] Preferably, the support is located on the upper end of the outer wall of the distribution channel. This makes it easy to manufacture and convenient to use with auxiliary equipment.

[0010] Preferably, the flow control port is an annular structure that is narrower at the top and wider at the bottom, and the flow control plug is a boss structure that is narrower at the top and wider at the bottom. When molten steel is injected into the molten pool, a complete seal can be achieved through the flow control port and the flow control plug to prevent molten steel from entering the distribution channel from the outlet channel.

[0011] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1This is a schematic diagram of the overall structure of the controllable flow rate thin strip continuous casting distributor in the embodiment. Figure 2 yes Figure 1 A sectional view; Figure 3 yes Figure 1 Side cross-sectional view of a thin strip continuous casting distributor with controllable flow rate (when the flow control plug and flow control port are in contact). Figure 4 yes Figure 3 A schematic diagram showing the state when the central flow control plug and the flow control port are separated; Among them, 1 is a buffer tank, 101 is a molten steel tank body, 102 is a steel discharge tank body, 103 is a flow control port, 104 is a molten steel tank, and 105 is a steel discharge tank. 2. Flow distribution channel, 201. Flow distribution channel body, 202. Buffer overflow channel, 203. Support, 204. Flow control plug, 205. Front buffer overflow port, 206. Side buffer overflow port. Detailed Implementation

[0013] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0014] Example: See Figures 1-4 A flow distributor for thin strip continuous casting with controllable flow rate includes a buffer tank 1 and a flow distribution tank 2, with detailed structure as follows: The buffer tank 1 includes a molten steel tank body 101 and a steel discharge tank body 102. The molten steel tank body 101 is provided with a molten steel tank 104, and the steel discharge tank body 102 is provided with a steel discharge tank 105 and a flow control port 103 connected to the steel discharge tank 105. The molten steel tank 104 is connected to the steel discharge tank 105.

[0015] The flow distribution channel 2 includes a flow distribution channel body 201, a buffer overflow channel 202, and a flow control plug 204. The flow distribution channel body 201 and the buffer overflow channel 202 are connected to form a receiving cavity. The flow control plug 204 is disposed on the inner wall of the receiving cavity and matches the flow control port 103. The flow distribution channel body 201 and / or the buffer overflow channel 202 are provided with overflow ports. The flow rate is controlled by adjusting the relative position of the flow control plug 204 and the flow control port 103 in conjunction with the overflow ports. The flow distribution channel body 201 is provided with a support 203, which facilitates the control of the height of the flow distribution channel 2 by means of auxiliary equipment. More preferably, the flow control port 103 is an annular structure that is narrow at the top and wide at the bottom, and the flow control plug 204 is a boss structure that is narrow at the top and wide at the bottom.

[0016] In this embodiment, the flow distribution channel 201 and the buffer overflow channel 202 are arranged in the vertical direction; the overflow port is located at the lower end of the side wall of the buffer overflow channel 202. In this embodiment, the overflow port is preferably 5-20cm away from the lower end of the side wall of the buffer overflow channel, which can be determined according to the actual working conditions.

[0017] In this embodiment, the overflow outlet includes a front buffer overflow outlet 205 and side buffer overflow outlets 206 spaced apart from the front buffer overflow outlet 205. Further, the number of front buffer overflow outlets 205 is at least two spaced apart; the number of side buffer overflow outlets 206 is at least two spaced apart. The specific values ​​of the front buffer overflow outlets and side buffer overflow outlets can be set according to actual operating conditions.

[0018] In this embodiment, the eaves 203 are disposed on the upper end of the outer wall of the distribution channel 201, and can be provided in two symmetrical sets according to actual needs, such as... Figure 3 and Figure 4 As shown.

[0019] Applying the technical solution of this embodiment, when molten steel flows out from the tundish, it successively fills the molten steel tank 104 and the tapping tank 105. Under the control of auxiliary equipment, the flow control port 103 and the flow control plug 204 are tightly fitted, resulting in molten steel accumulation or a small flow rate. When tapping begins, the distribution tank 2 descends under the control of auxiliary equipment, and the molten steel flows out from the flow control port 103 of the buffer tank 1 and into the distribution tank 2. Subsequently, it flows out evenly and smoothly from the front buffer overflow port 205 and the side buffer overflow port 206, entering the molten pool. By controlling the position of the distribution tank 2, the tapping area can be adjusted. Combined with the molten steel level data in the distribution tank 2, the flow field of the molten pool can be directly and dynamically controlled, realizing the adjustment of molten steel flow rate in thin strip continuous casting.

[0020] The advantages of applying the technical solution in this embodiment are as follows: The controllable flow rate thin strip continuous casting distributor of this utility model includes a buffer tank and a distribution tank. The flow rate is adjusted jointly by the liquid level in the buffer tank (steel height) and the drop height of the distribution tank (cross-sectional area for steel outflow), which facilitates precise control of the steel flow rate. It can directly regulate the flow rate of steel flowing into the molten pool, and the control link has strong timeliness, thereby improving the stability of the casting process. In addition, the quantitative relationship between flow rate and control parameters can be easily obtained, resulting in accurate flow control and a stable flow field.

[0021] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flow distributor for thin strip continuous casting with controllable flow rate, characterized in that, It includes a buffer tank (1) and a flow distribution tank (2); The buffer tank (1) includes a molten steel tank body (101) and a discharge trough body (102). The molten steel tank body (101) is provided with a molten steel tank (104), and the discharge trough body (102) is provided with a discharge trough (105) and a flow control port (103) connected to the discharge trough (105). The molten steel tank (104) is connected to the discharge trough (105). The flow distribution channel (2) includes a flow distribution channel body (201), a buffer overflow channel (202), and a flow control plug (204). The flow distribution channel body (201) and the buffer overflow channel (202) are connected to form a receiving cavity. The flow control plug (204) is set on the inner wall of the receiving cavity and matches the flow control port (103). The flow distribution channel body (201) and / or the buffer overflow channel (202) are provided with overflow ports. The flow rate is controlled by adjusting the relative position of the flow control plug (204) and the flow control port (103) in combination with the overflow port.

2. The controllable flow rate thin strip continuous casting distributor according to claim 1, characterized in that, The flow distribution channel (201) and the buffer overflow channel (202) are arranged in the vertical direction; The overflow port is located at the lower end of the side wall of the buffer overflow trough (202).

3. The controllable flow rate distribution device for thin strip continuous casting according to claim 2, characterized in that, The overflow outlet includes a front buffer overflow outlet (205) and a side buffer overflow outlet (206) spaced apart from the front buffer overflow outlet (205).

4. The controllable flow rate strip continuous casting distributor according to claim 3, characterized in that, The number of the front buffer overflow ports (205) is at least two that are spaced apart; The number of the side buffer overflow ports (206) is at least two that are spaced apart.

5. The controllable flow rate distribution device for thin strip continuous casting according to any one of claims 2-4, characterized in that, The distribution channel body (201) is provided with a support (203) to facilitate the distribution channel (2) to control its height position through auxiliary equipment by means of the support (203).

6. The controllable flow rate strip continuous casting distributor according to claim 5, characterized in that, The eaves (203) are located on the upper part of the outer wall of the distribution channel (201).

7. The controllable flow rate strip continuous casting distributor according to claim 5, characterized in that, The flow control port (103) is an annular structure that is narrow at the top and wide at the bottom, and the flow control plug (204) is a boss structure that is narrow at the top and wide at the bottom.

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