CN210435359U

CN210435359U - Stopper rod

Info

Publication number: CN210435359U
Application number: CN201921442146.6U
Authority: CN
Inventors: 胡增; 夏振东; 胡睿; 胡升; 岳强
Original assignee: Anhui University of Technology AHUT
Current assignee: Anhui University of Technology AHUT
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-05-01
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a stopper rod belongs to stopper rod equipment technical field, the utility model discloses a stopper rod body, the outside cover of stopper rod body is equipped with a nested body, just gas channel has been seted up in the nested body, gas channel is linked together with the mouth of blowing, the lower extreme at the nested body is seted up to the mouth of blowing. The utility model discloses an outside at the stopper stick body is equipped with a nested body, and is equipped with gas channel in the nested body for blow to the molten steel, this structural design for set up gas channel inside the stopper stick, its stopper stick bulk strength is higher, and the nested body carries out certain protection to the stopper stick body simultaneously, effectively guarantees that the stopper stick is difficult for breaking occur in the use.

Description

Stopper rod

Technical Field

The utility model relates to a stopper stick equipment technical field, more specifically say, relate to a stopper stick.

Background

The stopper rod is a device which must be used in the continuous casting production process, has the function of controlling the flow rate of molten steel in a tundish flowing into a crystallizer, namely, is equivalent to a switch valve, effectively adjusts the liquid level of the crystallizer, and avoids the slag inclusion phenomenon caused by the overlarge fluctuation range of the liquid level.

In the continuous casting process, the impurities deposited at the water gap of the tundish block the steel flow, which not only influences the normal operation of the blank drawing, but also causes the generation of defective products. In order to solve the problem, argon or nitrogen is generally blown at a submerged nozzle, the penetration depth of bubbles is controlled through proper air pressure and flow, the deposits on the inner wall are washed, and the bubble group can carry away the non-metallic oxides suspended in the molten steel in the rising process. In order to realize the function of blowing, a vent hole is generally arranged in the stopper rod along the axial direction of the stopper rod, and the vent hole is communicated with a blowing port at the stopper head and blows air outwards through the blowing port.

However, the stopper rod is easy to break in the actual use process, and the vent hole is formed in the stopper rod, which further reduces the overall strength of the stopper rod, i.e., reduces the service life of the stopper rod.

Through search, the Chinese patent number ZL 201520331383.0, the invention creation name is: the utility model provides a water filling opening stopper stick, this application includes the barred body, barred body outer wall upper portion installation zirconium section of thick bamboo, and the shaping hole is seted up at barred body central point, and barred body bottom installation zirconium head, the end of zirconium head are the arc-shaped body, and the other end of zirconium head is the cylinder, and the cylinder base is connected with arc-shaped body upper end, and the overhead end of zirconium sets up the plane, and the plane touches with barred body bottom plane mutually. This application has seted up the shaping hole at stopper stick central part for let in gas, but because the stopper stick comprises refractory material, make the holistic intensity of stopper stick reduce at central trompil, the stopper stick damages easily or even splits, makes its life reduce, awaits further improvement.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome the problem that the stopper rod is easy to break in the prior art and provides a stopper rod; the utility model discloses a set up a nested body in the outside of stopper stick body, and set up gas passage in the nested body for blow to the molten steel, this structural design is for offering gas passage in stopper stick inside, and its stopper stick bulk strength is higher, and the nested body carries out certain protection to the stopper stick body simultaneously, effectively guarantees that the stopper stick is difficult for breaking off in the use.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a stopper rod, including the stopper rod body, the outside cover of stopper rod body is equipped with a nested body, just gas channel has been seted up in the nested body, gas channel is linked together with the mouth of blowing, the lower extreme at the nested body is seted up to the mouth of blowing.

As a further improvement of the present invention, the nesting body comprises an outer shell and an inner shell; wherein, the gas channel is arranged between the outer shell and the inner shell, and the gas blowing opening is positioned at the lower end of the outer shell.

As a further improvement of the present invention, it is characterized in that: the shell is provided with a plurality of air blowing layers, each air blowing layer is at least provided with 6 air blowing openings, and the air blowing openings in each air blowing layer are arranged at equal intervals along the circumferential direction of the shell.

As a further improvement of the utility model, each air blowing layer on the shell is provided with 12 air blowing openings.

As a further improvement of the utility model, the stopper rod body is connected with the inner shell through a lug in a sliding manner.

As a further improvement of the utility model, the lug sets up on the stopper rod body, just the lug sets up on the length direction of stopper rod body, be equipped with on the inner wall of inner shell with lug matched with spout.

As a further improvement of the present invention, the projection is disposed on the inner wall of the inner shell, and is disposed along the length direction of the inner shell, and the stopper body is provided with a sliding groove matched with the projection.

As a further improvement of the utility model, the lug is at least provided with 2 along stopper body circumference.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

(1) the utility model discloses a stopper rod, be equipped with a nested body through the outside at the stopper rod, and be equipped with gas passage in the nested body, let in argon gas or nitrogen gas in to gas passage, can effectively avoid the inclusion to locate the deposit and make the emergence of this problem of steel stream jam at immersion nozzle, be favorable to getting rid of the inclusion in the molten steel simultaneously, this structural design is for offering gas passage in the stopper rod is inside among the prior art, its stopper rod bulk strength is higher, the nested body carries out certain protection to the stopper rod body simultaneously, extension stopper rod life, effectively avoid the stopper rod to take place to damage or even fracture in the use.

(2) The utility model discloses a stopper rod, in order to improve the during operation of stopper rod to the effect of molten steel edulcoration, design gas piping, especially be directed at the layout design of blowing the mouth, through be equipped with a plurality of layers of blowing on the shell, and every is blown and is equipped with a plurality of mouths of blowing on the layer, when blowing, can effectual assurance homogeneity of blowing, tiny bubble that the mouth of blowing blew is mingled with the little oxide in the molten steel from middle package bottom area to the slag interface on upper portion, like aluminium trioxide etc., realize getting rid of the function of inclusion.

(3) The utility model discloses a stopper stick, sliding connection between its stopper stick body and the inner shell, the stopper stick body suit of being convenient for is in the inner shell, simultaneously because the design of lug and spout for the stopper stick is at the in-service use in-process, and the normal work of stopper stick is guaranteed to difficult mutual rotation between the nested body and the stopper stick body.

Drawings

FIG. 1 is a schematic cross-sectional view of a stopper rod according to the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic view of another cross-sectional structure at A-A in FIG. 1;

fig. 5 is another schematic structural view of the middle nested body of the present invention.

The reference numerals in the schematic drawings illustrate:

10. a stopper body; 11. a stopper rod head; 20. embedding a sleeve body; 21. a housing; 22. an inner shell; 23. a bump; 24. installing a clamping block; 30. a gas channel; 31. and an air blowing opening.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Example 1

Referring to fig. 1, the stopper rod of the present embodiment includes a stopper rod body 10, the lower end of the stopper rod body 10 is a stopper rod head 11, the present embodiment is provided with a nesting body 20 outside the stopper rod body 10, the nesting body 20 is equivalent to a protection layer, and can protect the stopper rod body 10, specifically: in the practical use process of the stopper rod, the nested body 20 on the stopper rod can effectively prevent molten steel or steel slag from corroding the stopper rod body 10, and damage to the stopper rod body 10 is effectively avoided.

It is noted that the thickness of the nest 20 in this embodiment is 10-200 mm.

As shown in fig. 1, in the embodiment, a gas channel 30 is arranged inside the nesting body 20, and a gas blowing port 31 is arranged at the lower end of the nesting body 20, the gas blowing port 31 is communicated with the gas channel 30, and argon or nitrogen is introduced into the gas channel 30, so that the phenomenon that inclusions are deposited at a submerged nozzle in a tundish to block a steel flow can be effectively avoided, and the inclusions in the steel liquid can be removed.

It is worth to be noted that, the gas channel 30 in this embodiment is arranged along the length direction of the nest 20, the manufacturing process is simple, the pressure loss of the gas in the gas channel 30 is small, the pressure required by the gas blowing port 31 is effectively ensured, and the energy consumption is reduced.

Preferably, with reference to fig. 1, 2 and 3, the gas line of the nest 20 in this embodiment is specifically designed to: the nested body 20 comprises an outer shell 21 and an inner shell 22; the gas channel 30 in this embodiment is located between the outer shell 21 and the inner shell 22, and the cross section of the outer shell 21 and the cross section of the inner shell 22 are annular, and the cross section of the gas channel 30 is also annular, see fig. 2 or fig. 3; the gas blowing port 31 of the embodiment is positioned at the lower end of the shell 21, and gas positioned in the gas channel 30 enters molten steel through the gas blowing port 31, so that impurities are removed from the molten steel and the smoothness of the submerged nozzle is ensured.

In addition, a plurality of blowing layers are arranged on the housing 21, the number of the blowing layers can be 1, 2, 4, 6 and 8 … …, and each blowing layer is provided with at least 6 blowing openings 31, for example, 6, 8, 10, 12 and 16 … …, in order to ensure the uniformity of the gas blown from the blowing openings 31 to the molten steel, the blowing openings 31 in each blowing layer are arranged at equal intervals along the circumferential direction of the housing 21 in the embodiment.

Preferably, the number of the air-blowing layers in the present embodiment is 6, and the number of the air-blowing openings 31 in each air-blowing layer is 12.

According to the stopper rod, the gas pipeline is designed in a layout mode, gas is blown out of the gas blowing port 31 after moving in the gas pipeline, small oxide inclusions in molten steel are brought to a steel slag interface at the upper part from the bottom of the tundish by fine bubbles, the function of removing the inclusions is achieved, meanwhile, a certain disturbance effect is generated on the molten steel, and steel flow blockage is avoided.

Example 2

A stopper rod of this embodiment, substantially as in embodiment 1, further comprising: referring to fig. 2 and 3, the stopper rod body 10 and the inner shell 22 in this embodiment are slidably connected by a projection 23.

The method specifically comprises the following steps: the projection 23 of the embodiment is disposed on the stopper rod body 10, and the projection 23 is disposed along the length direction of the stopper rod body 10, and a sliding groove matched with the projection 23 is disposed on the inner wall of the inner shell 22. It should be noted that the cross section of the bump 23 of the present embodiment is quadrilateral, and may be square, rectangle, rhombus, trapezoid, etc.

In addition, in order to ensure the stopper rod body 10 to be stably installed in the nest 20, the number of the convex blocks 23 is at least 2, and may be 2, 3, 4 … … along the circumferential direction of the stopper rod body 10

Preferably, there are 4 bumps 23 in the present embodiment, and the bump 23 is an elongated bar with a trapezoidal cross section. The stopper rod body 10 is conveniently sleeved in the inner shell 22 by the structural design, and the stopper rod is not easy to rotate between the nesting body 20 and the stopper rod body 10 in the actual use process, so that the normal work of the stopper rod is ensured.

Example 3

A stopper rod of this embodiment is substantially the same as embodiment 1 except that: as shown in fig. 4, the protrusion 23 of the present embodiment is disposed on the inner wall of the inner shell 22, and the protrusion 23 is disposed along the length direction of the inner shell 22, and a sliding groove matched with the protrusion 23 is provided on the stopper rod body 10.

In addition, the number of the projections 23 in this embodiment is 3, and the 3 projections 23 are arranged at equal intervals along the circumferential direction of the inner casing 22.

As shown in fig. 5, the outer edge of the cross section of the housing 21 in this embodiment is square and the inner edge is circular.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A stopper rod comprising a stopper rod body (10), characterized in that: the plug is characterized in that a nested body (20) is sleeved outside the plug body (10), a gas channel (30) is arranged in the nested body (20), the gas channel (30) is communicated with a gas blowing opening (31), and the gas blowing opening (31) is arranged at the lower end of the nested body (20).

2. A stopper rod as claimed in claim 1, wherein: the embedded sleeve body (20) comprises an outer shell (21) and an inner shell (22); wherein the gas channel (30) is arranged between the outer shell (21) and the inner shell (22), and the gas blowing opening (31) is positioned at the lower end of the outer shell (21).

3. A stopper rod as claimed in claim 2, wherein: the shell (21) is provided with a plurality of blowing layers, each blowing layer is at least provided with 6 blowing openings (31), and the plurality of blowing openings (31) in each blowing layer are arranged at equal intervals along the circumferential direction of the shell (21).

4. A stopper rod as claimed in claim 3, wherein: each air blowing layer on the shell (21) is provided with 12 air blowing openings (31).

5. A stopper rod as claimed in claim 2, wherein: the stopper rod body (10) is connected with the inner shell (22) in a sliding mode through a convex block (23).

6. A stopper rod as claimed in claim 5, wherein: the convex block (23) is arranged on the stopper rod body (10), the convex block (23) is arranged along the length direction of the stopper rod body (10), and a sliding groove matched with the convex block (23) is arranged on the inner wall of the inner shell (22).

7. A stopper rod as claimed in claim 5, wherein: the convex block (23) is arranged on the inner wall of the inner shell (22), the convex block (23) is arranged along the length direction of the inner shell (22), and a sliding groove matched with the convex block (23) is arranged on the stopper rod body (10).

8. A stopper rod as claimed in claim 6 or 7, wherein: the number of the convex blocks (23) is at least 2 along the circumferential direction of the stopper rod body (10).