Anti-explosion stopper rod without argon blowing hole

Abstract

The utility model relates to an anti-explosion stopper without an argon blowing hole, which belongs to the technical field of continuous casting stoppers and comprises a stopper body inserted into a tundish, one end, extending into the tundish, of the stopper body is a head end, the other end, extending out of the tundish, of the stopper body is a tail end, and the end face of the tail end is provided with an empty groove. An exhaust hole communicated with the empty groove is formed in the outer side wall, close to the tail end, of the stopper rod body. According to the stopper rod, the exhaust hole communicated with the empty groove is formed in the outer side wall of the stopper rod body, after air in the empty groove is expanded, the expanded air can be quickly exhausted, the risks of cracks, even explosion and the like of the stopper rod body caused by the expanded air are avoided, and the use safety of the stopper rod body is improved; meanwhile, as the exhaust hole is arranged close to the tail end extending out of the tundish, molten steel in the tundish can be prevented from flowing into the empty groove through the exhaust hole, and quality accidents such as cracks and fractures caused by the fact that the interior of the stopper rod body is eroded by the molten steel are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting stopper rods, in particular to an anti-explosion stopper rod without argon blowing holes. Background Art

[0002] Continuous casting of three major parts, such as Figure 1 As shown, it includes a long nozzle for continuous casting, an integral stopper rod and an immersed nozzle, which are used to connect the ladle, the tundish and the crystallizer in a trinity, play a role in controlling and guiding the molten steel, preventing the secondary oxidation of the molten steel, and realizing continuous casting.

[0003] At present, the integral stopper rod is mainly composed of the stopper rod and the cavity inside it, and is divided into argon-blown hole type stopper rod and non-argon-blown hole type stopper rod according to whether there is an argon-blown hole on the head of the stopper rod; the argon-blown hole type stopper rod or the non-argon-blown hole type stopper rod is located in the tundish and its head is immersed in the molten steel, mainly to control and adjust the flow rate of molten steel; among them, the gas in the cavity of the non-argon-blown hole type stopper rod cannot be discharged, and the stopper rod may crack or even explode due to the expansion of the gas (the stopper rod itself has an extremely low temperature due to the ambient temperature, and the inside of the stopper rod is hollow, which will store cold air. The stored cold air is the same as the room temperature. During the high-temperature baking of the steel plant and normal use, there will be a large temperature difference between extremely cold and extremely hot in an instant. The stopper rod will crack or even explode due to the instantaneous expansion of the gas). The explosion of the stopper rod immersed in the molten steel will cause molten steel splashing, serious personal safety accidents and serious production quality accidents. The temperature in northern steel mills can even drop below minus 30 degrees Celsius in winter, while the baking temperature and operating temperature of the stopper rod are above 1200 degrees Celsius and 1500 degrees Celsius respectively, making explosion accidents more likely to occur.

[0004] In order to solve the above technical problems, the market usually improves the strength and thermal stability of the clay to avoid the cracking problem caused by temperature difference. However, when the baking temperature is too high, the plug rod is still at risk of cracking or even exploding.

[0005] Therefore, how to design an anti-explosion plug rod without an argon blowing hole is a problem that those skilled in the art need to solve urgently. Utility Model Content

[0006] The utility model provides an anti-explosion plug rod without an argon blowing hole, which solves the technical problem that the existing plug rod without an argon blowing hole is prone to cracks or explosions.

[0007] The utility model provides a technical solution to the above technical problem as follows: an anti-explosion stopper rod without an argon blowing hole, comprising a stopper rod body inserted into a tundish, wherein one end of the stopper rod body extending into the tundish is a head end and the other end extending out of the tundish is a tail end, an end surface of the tail end is provided with an empty groove, and an outer side wall of the stopper rod body close to the tail end is provided with an exhaust hole communicating with the empty groove.

[0008] The beneficial effects of the utility model are:

[0009] 1. By providing an exhaust hole connected to the empty groove on the outer side wall of the stopper rod body, when the air in the empty groove expands, the expanded gas can be quickly discharged to avoid the danger of cracks or even explosion of the stopper rod body caused by the expanded air, thereby improving the safety of the stopper rod body;

[0010] 2. Since the exhaust hole is arranged close to the tail end of the tundish, it can prevent the molten steel in the tundish from flowing into the empty slot through the exhaust hole, causing the inside of the stopper rod to be corroded by the molten steel and cause cracks, breakage and other quality accidents;

[0011] 3. By designing a hollow groove in the stopper rod body, raw materials can be saved and product weight can be reduced.

[0012] On the basis of the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, the distance between the exhaust hole and the head end is 180 mm to 220 mm.

[0014] Furthermore, the diameter of the exhaust hole is 6 mm to 8 mm.

[0015] Furthermore, the stopper rod body includes a pointed portion, a transition connection portion and a main body portion which are bonded together in sequence from the head end to the tail end, wherein the head end is the free end of the pointed portion; the tail end is the free end of the main body; the empty groove is arranged in the main body, the transition connection portion and the pointed portion and passes through the free end of the main body; and the exhaust hole is arranged on the side wall of the transition connection portion.

[0016] Furthermore, the material of the pointed part is corundum, graphite and spinel (aluminum content 60-65%, carbon content 18-23%, magnesium content 5-9%), the material of the transition connection part is corundum and graphite (aluminum content 50-65%, carbon content 28-35%), and the material of the main body part is a mixture of the head material and the transition connection part in a ratio of 1:1.

[0017] Furthermore, an inner side wall of the empty slot close to the tail end is provided with an internal thread for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the installation structure of an anti-explosion plug rod without an argon blowing hole of the utility model;

[0019] Figure 2 The utility model is a schematic diagram of the internal structure of an anti-explosion plug rod without an argon blowing hole.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. stopper rod body, 11. pointed part, 12. transition connection part, 13. main body, 14. empty groove, 15. exhaust hole. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] like Figure 1 As shown, an explosion-proof stopper rod without an argon blowing hole comprises a stopper rod body 1 inserted into a tundish, wherein the end of the stopper rod body 1 extending into the tundish is the head end and the other end extending out of the tundish is the tail end, and an empty groove 14 is provided on the end surface of the tail end; an exhaust hole 15 communicating with the empty groove 14 is provided on the outer side wall of the stopper rod body 1 near the tail end.

[0024] In some specific embodiments, the distance between the exhaust hole 15 and the head end may be 180 mm to 220 mm.

[0025] In some specific embodiments, the diameter of the exhaust hole 15 may be 6 mm to 8 mm.

[0026] In some specific embodiments, the stopper rod body 1 may include a pointed portion 11, a transition connection portion 12 and a main body portion 13 which are bonded together in sequence from the head end to the tail end, wherein the head end is the free end of the pointed portion 11; the tail end is the free end of the main body portion 13; the empty groove 14 is provided in the main body portion 13, the transition connection portion 12 and the pointed portion 11 and passes through the free end of the main body portion 13; and the exhaust hole 15 is provided on the side wall of the transition connection portion 12.

[0027] Furthermore, the tip portion 11 is made of corundum, graphite and spinel (aluminum content 60-65%, carbon content 18-23%, magnesium content 5-9%), the transition connection portion 12 is made of corundum and graphite (aluminum content 50-65%, carbon content 28-35%), and the main body 13 is made of a 1:1 mixture of the tip portion 11 and the transition connection portion 12.

[0028] In some specific embodiments, the inner side wall of the hollow groove 14 near the rear end may be provided with an internal thread for installation.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. 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. An anti-explosion stopper rod without an argon blowing hole, comprising a stopper rod body (1) inserted into a tundish, wherein one end of the stopper rod body (1) extending into the tundish is a head end and the other end extending out of the tundish is a tail end, and an end surface of the tail end is provided with an empty groove (14); characterized in that: An exhaust hole (15) communicating with the hollow groove (14) is provided on the outer side wall of the stopper rod body (1) close to the tail end.

2. The anti-explosion stopper rod without argon blowing hole according to claim 1, characterized in that: The distance between the exhaust hole (15) and the head end is 180 mm to 220 mm.

3. The anti-explosion stopper rod without argon blowing hole according to claim 1, characterized in that: The diameter of the exhaust hole (15) is 6 mm to 8 mm.

4. The anti-explosion stopper rod without argon blowing hole according to claim 1, characterized in that: The stopper rod body (1) comprises, from the head end to the tail end, a pointed portion (11), a transitional connection portion (12) and a main body portion (13) which are bonded together in sequence, wherein the head end is the free end of the pointed portion (11); the tail end is the free end of the main body portion (13); the empty groove (14) is arranged in the main body portion (13), the transitional connection portion (12) and the pointed portion (11) and passes through the free end of the main body portion (13); and the exhaust hole (15) is arranged on the side wall of the transitional connection portion (12).

5. The anti-explosion stopper rod without argon blowing hole according to claim 1, characterized in that: The inner side wall of the empty slot (14) close to the tail end is provided with an internal thread for installation.

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