Tundish collector nozzle cutting device

Abstract

The utility model relates to the technical field of steel casting, in particular to a tundish collector nozzle cut-off device which comprises a device body, the device body is arranged at the joint of a sewer pipe and a tundish, and the device body comprises a replaceable cover body, a cut-off seat and a connecting pipe. One end of the connecting pipe is inserted into the bottom of the tundish; the replaceable cover body is arranged above the cutting seat, and molten steel in the connecting pipe can pass through the replaceable cover body; a cut-off mechanism is arranged in the cut-off seat, and the cut-off mechanism can cut off molten steel in the replaceable cover body; the drainage pipe is communicated with the replaceable cover body, molten steel can be cut off through the arranged cut-off device when the stopper rod is abnormal, and the drainage pipe can be protected within a short time. And by arranging the replaceable cover body, the broken cover body can be replaced after cutting off, and a new cover body is installed, so that repeated use is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel casting, in particular to a tundish water outlet cutting device. Background Art

[0002] Continuous casting, that is, continuous steel casting, is a molten steel forming technology that continuously adds refined molten steel into a crystallizer and pulls the molten steel out from the bottom of the crystallizer after solidification. Usually, the tundish continuous casting metallurgical method is used. The overall process flow is that the ladle is first transported to the rotary tower through a transport device, and then the molten steel in the ladle is transported to the crystallizer through a unloading mechanism to solidify and form a shell. The ingot with liquid core is then cooled in the secondary cooling zone to make the shell grow evenly and stably. Finally, the shell is completely produced and transported to the steel rolling process for processing via a conveying mechanism.

[0003] The tundish is mainly used for diverting, continuously pouring and protecting molten steel in the entire continuous casting process. However, in actual use, when the molten steel enters the tundish through the down pipe or the long nozzle, the initial tundish temperature is low and slag will form. Long-term use will cause blockage or corrosion of the down pipe structure, reducing the service life of the tundish.

[0004] In order to solve this problem, a stopper rod is usually used to quickly change the water outlet, and the stopper rod is used to control the molten steel flow rate of the water outlet. However, when the stopper rod is abnormal, vortexes are likely to occur at the water outlet, and the flow rate is difficult to control, which can easily cause corrosion to the sewer pipe and affect its service life. Therefore, a device is needed to deal with this abnormality and protect the sewer pipe. Utility Model Content

[0005] In view of the above problems, the utility model provides a tundish water outlet cutting device.

[0006] The adopted technical solution is a tundish downpipe cutting device, comprising a device body, the device body being arranged at the connection between the downpipe and the tundish, wherein the device body comprises a replaceable cover body, a cutting seat and a connecting pipe;

[0007] One end of the connecting pipe is inserted into the bottom of the tundish, and the other end is inserted into the replaceable cover;

[0008] The replaceable cover is arranged above the cutting seat, and the molten steel in the connecting pipe can pass through the replaceable cover;

[0009] A cutting mechanism is arranged in the cutting seat, and the cutting mechanism can cut off the molten steel in the replaceable cover body;

[0010] The downpipe is communicated with the replaceable cover body.

[0011] Further, the replaceable cover body includes a cover plate and an annular conduit, and the annular conduit passes through the bottom of the cover plate;

[0012] The cover plate is detachably connected to the cutting seat.

[0013] Optionally, the annular conduit is made of refractory material, and a diversion cavity is provided in the annular conduit, and the connecting pipe and the downcomer pipe are both inserted into the diversion cavity.

[0014] Optionally, the top of the cutting seat is an open structure, a cutting groove and a cutting knife are arranged in the cutting seat, and the cutting knife can move in the cutting seat;

[0015] The annular conduit passes through the cutting groove.

[0016] Furthermore, a hydraulic pusher is arranged outside one side of the cutting seat, and a power output end of the hydraulic pusher is connected to one end of a push rod, and the other end of the push rod passes through the cutting seat and is connected to the bottom of the cutter.

[0017] Optionally, a coupling is provided in the cutting seat, and the push rod passes through the coupling.

[0018] Optionally, the bottom of the cutter contacts the cover plate.

[0019] The beneficial effects of the present utility model include at least one of the following:

[0020] 1. The cut-off device can cut off the molten steel when the stopper rod is abnormal, and the downpipe can be protected in a short time.

[0021] 2. By providing a replaceable cover body, the broken cover body can be replaced after cutting, and a new cover body can be installed to achieve multiple uses and facilitate replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the tundish and the cutting device;

[0023] Figure 2 It is a schematic diagram of the internal structure of the cutting device;

[0024] Figure 3 It is a schematic diagram of the internal structure of another cutting device;

[0025] Figure 4 This is a schematic diagram of the cutting device structure from another perspective;

[0026] Wherein the figure marks are: 15 is the tundish, 16 is the cover plate, 17 is the downcomer, 18 is the stopper rod, 19 is the device body, 20 is the replaceable cover body, 21 is the cutting seat, 22 is the connecting pipe, 23 is the hydraulic pusher, 24 is the push rod, 25 is the coupling, 26 is the cutter, 27 is the cutting groove, 28 is the annular conduit, 29 is the diversion chamber, and 30 is the residue mixture. DETAILED DESCRIPTION

[0027] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0029] like Figures 1 to 4 As shown, a tundish downspout cut-off device comprises a device body 19, wherein the device body 19 is arranged at the connection between the downspout pipe 17 and the tundish 15, wherein the device body 19 comprises a replaceable cover 20, a cut-off seat 21 and a connecting pipe 22;

[0030] One end of the connecting pipe 22 is inserted into the bottom of the tundish 15, and the other end is inserted into the replaceable cover 20;

[0031] The replaceable cover 20 is arranged above the cutting seat 21, and the molten steel in the connecting pipe 22 can pass through the replaceable cover 20;

[0032] The cutting seat 21 is provided with a cutting mechanism, and the cutting mechanism can cut off the molten steel in the replaceable cover 20;

[0033] The down pipe 17 is in communication with the replaceable cover body 20 .

[0034] The purpose of this design is that the cut-off device can cut off the molten steel when the stopper rod is abnormal, and the downpipe can be protected in a short time. By setting a replaceable cover, the broken cover can be replaced after cutting, and a new cover can be installed to achieve multiple uses, which solves the problem that when the stopper rod of the existing tundish is abnormal during use, eddy currents are likely to occur at the downpipe, and the flow is difficult to control, which is easy to corrode the downpipe and affect its service life.

[0035] It should be pointed out that, usually, the down pipe and the connecting pipe are arranged below the projection of the stopper rod 18 .

[0036] In this embodiment, the replaceable cover body 20 includes a cover plate 16 and an annular conduit 28, and the annular conduit 28 passes through the bottom of the cover plate 16;

[0037] The cover plate 16 is detachably connected to the cutting seat 21 .

[0038] Furthermore, the annular conduit 28 is made of refractory material, and a flow guiding cavity 29 is provided in the annular conduit 28 , and the connecting pipe 22 and the down pipe 17 are both inserted into the flow guiding cavity 29 .

[0039] The top of the cutting seat 21 is an open structure, and a cutting groove 27 and a cutting knife 26 are provided in the cutting seat 21, and the cutting knife 26 can move in the cutting seat 21;

[0040] The annular conduit 28 passes through the cutting groove 27 .

[0041] Furthermore, a hydraulic pusher 23 is provided outside one side of the cutting seat 21 , and the power output end of the hydraulic pusher 23 is connected to one end of a push rod 24 , and the other end of the push rod 24 passes through the cutting seat 21 and is connected to the bottom of the cutter 26 .

[0042] Meanwhile, a coupling 25 is arranged in the cutting seat 21 , and the push rod 24 passes through the coupling 25 .

[0043] The purpose of such design is that, in normal use, the molten steel in the tundish enters the guide cavity through the connecting pipe, then flows into the down pipe through the guide cavity and is transported to the crystallizer.

[0044] When the sensor in the tundish detects an abnormality, such as the stopper rod sensor finds that the stopper rod has stopped working, the hydraulic pusher is turned on through the terminal or manually to drive the cutter to move toward the annular duct, destroying and blocking the annular duct, so that the molten steel cannot flow into the down pipe but flows into the cutting groove. The molten steel is cooled and forms a residue mixture with the damaged annular duct, which stops or slows down the flow.

[0045] When performing maintenance, the on-site staff will replace the damaged replaceable cover, clean the cut-off groove, and then install the replaceable cover and the connecting pipe again.

[0046] It should be noted that in order to avoid or reduce the influence of molten steel on the push rod and other components, the bottom of the cutter 26 contacts the cover plate 16, so that the residual mixture produced will move toward the side of the cutting groove away from the push rod.

[0047] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tundish drain port cutting device, comprising a device body (19), wherein the device body (19) is arranged at the connection between a drain pipe (17) and a tundish (15), and characterized in that: The device body (19) comprises a replaceable cover (20), a cutting seat (21) and a connecting pipe (22); One end of the connecting pipe (22) is inserted into the bottom of the tundish (15), and the other end is inserted into the replaceable cover (20); The replaceable cover (20) is arranged above the cutting seat (21), and the molten steel in the connecting pipe (22) can pass through the replaceable cover (20); A cutting mechanism is arranged in the cutting seat (21), and the cutting mechanism can cut off the molten steel in the replaceable cover body (20); The downpipe (17) is in communication with the replaceable cover body (20).

2. The tundish downspout cutting device according to claim 1, characterized in that: The replaceable cover body (20) comprises a cover plate (16) and an annular conduit (28), wherein the annular conduit (28) passes through the bottom of the cover plate (16); The cover plate (16) is detachably connected to the cutting seat (21).

3. The tundish drain outlet cutting device according to claim 2, characterized in that: The annular conduit (28) is made of a refractory material. A flow guide cavity (29) is provided in the annular conduit (28). Both the connecting pipe (22) and the down pipe (17) are inserted into the flow guide cavity (29).

4. A tundish drain port cutting device according to claim 3, characterized in that: The top of the cutting seat (21) is an open structure, a cutting groove (27) and a cutting knife (26) are provided in the cutting seat (21), and the cutting knife (26) can move in the cutting seat (21); The annular conduit (28) passes through the cutting groove (27).

5. The tundish downspout cutting device according to claim 4, characterized in that: A hydraulic pusher (23) is provided outside one side of the cutting seat (21), and a power output end of the hydraulic pusher (23) is connected to one end of a push rod (24), and the other end of the push rod (24) passes through the cutting seat (21) and is connected to the bottom of the cutter (26).

6. The tundish downspout cutting device according to claim 5, characterized in that: A coupling (25) is arranged inside the cutting seat (21), and the push rod (24) passes through the coupling (25).

7. The tundish downspout cutting device according to claim 5, characterized in that: The bottom of the cutter (26) is in contact with the cover plate (16).

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