Submersed nozzle capable of preventing tundish from being broken in pouring

Abstract

The utility model belongs to the technical field of continuous casting, and discloses a submersed nozzle capable of preventing a tundish from being broken in pouring, which is characterized by comprising a bowl opening and a body, wherein the body sequentially comprises a first body, a transition layer and a second body from top to bottom; and the transition layer is provided with a circumferential guide groove. According to the tundish, the transition layer and the guide groove are arranged, so that the proportion of pouring interruption caused by accidents and incapability of replacing the nozzle due to the structure of the tundish using the integral submersed nozzle can be effectively reduced, the service time of a single tundish is prolonged, the production cost is reduced, and meanwhile, the operation is simple and effective.

Description

TECHNICAL FIELD

[0001] The utility model belongs to continuous casting technical field, concretely relates to a kind of submerged entry nozzle to avoid tundish pouring stop. BACKGROUND

[0002] Slab integral submerged entry nozzle can exist slag line or body longitudinal crack, perforation and so on in use, due to the reason that integral submerged entry nozzle is embedded in tundish, leading to nozzle cannot be replaced, it can cause tundish pouring stop;Or be shackled by the limit performance of integral submerged entry nozzle slag line, cannot be replaced quickly, leading to cannot reach longer use time. Current method to solve this problem is: when nozzle itself appears perforation or longitudinal crack and so on, single-flow stop pouring or whole machine stop pouring, tundish is baked and reopens pouring;Nozzle is normally used to reach limit, but does not meet the expected time of steel plant, mainly also to tundish replacement by early baking tundish as main means;Therefore, the existing method has the problem of single-flow or whole machine stop pouring, since replacing tundish will increase great production cost, it will cause great obstruction and difficulty to steel plant in production and organization.

[0003] Therefore, how to provide a kind of submerged entry nozzle to avoid tundish pouring stop is an urgent problem to be solved. CONTENT OF UTILITY MODEL

[0004] Therefore, the utility model provides a kind of submerged entry nozzle to avoid tundish pouring stop, solves the problem raised in the above background art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A kind of submerged entry nozzle to avoid tundish pouring stop, including bowl mouth and body;

[0007] Wherein, the body is sequentially first body, transition layer and second body from top to bottom;

[0008] The transition layer is equipped with circumferential guide groove.

[0009] Preferably, the width and depth of the circumferential guide groove are 3-5mm.

[0010] Preferably, when the body thickness is greater than or equal to 20mm, the guide groove depth is 5mm;When less than 20mm, the depth is 3mm.

[0011] Preferably, the height of the transition layer is 30-50mm.

[0012] Preferably, the normal temperature bending strength of the transition layer is 6-7MPa, and the strength of the first body and the second body is 9-10MPa.

[0013] Preferably, it also includes a replacement water inlet that matches the immersion water inlet, wherein the rim of the replacement water inlet has a groove that matches the body diameter of the immersion water inlet.

[0014] Preferably, the depth of the groove is 40-60mm.

[0015] Preferably, the body of the replacement water inlet and the body of the immersion water inlet have the same diameter.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention, by setting a transition layer and a guide groove, can effectively reduce the proportion of interrupted pouring caused by accidents due to the inability to replace the sprue in tundishes with integral submersible sprues because of their structural limitations. It also extends the service life of a single tundish, thereby reducing production costs. At the same time, it is simple and effective to operate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a structural diagram of an immersion-type sprue for avoiding interrupted pouring in the tundish according to the present invention;

[0020] Figure 2 This is a structural diagram of the water inlet replacement method of this utility model;

[0021] Figure 3 This is a structural diagram of the immersion-type water inlet of this utility model after the water inlet has been replaced. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Example 1

[0024] like Figure 1 An immersion gate that avoids interrupted pouring from the tundish specifically includes the following structure:

[0025] Includes the rim 1 and the main body;

[0026] Wherein, the body is sequentially from top to bottom the first body 2, the transition layer 3 and the second body 4;

[0027] The transition layer 3 is provided with the circumferential guide groove 5;

[0028] Further, the width and depth of the circumferential guide groove 5 are both 3-5mm; when the thickness of the body is greater than or equal to 20mm, the depth of the guide groove is 5mm; when the thickness of the body is less than 20mm, the depth of the guide groove is 3mm;

[0029] Further, the height of the transition layer 3 is 30-50mm;

[0030] Further, the cold bending strength of the transition layer 3 is 6-7MPa, and the strength of the first body 2 and the second body 4 is 9-10MPa; generally, the transition layer is made of the mud material with a bending strength slightly lower than that of the rest of the body; the mud material at the position can be appropriately reduced by 2-4% of phenolic resin powder and 1-3% of liquid resin according to the different mud materials of various factories;

[0031] Further, it also includes a replacement nozzle (such as Figure 2 ) matched with the submerged nozzle;

[0032] Further, the depth of the recess is;

[0033] Further, the diameter of the body 8 of the replacement nozzle and the first body 2 or the transition layer 3 of the submerged nozzle is the same;

[0034] When the submerged nozzle has a problem in use, the stopper is immediately closed to stop the flow, the clamp is used to hold the nozzle in use, the nozzle is broken and taken out; due to the design, the breaking position is the circumferential guide groove, then the replacement nozzle is installed, for safety, the sealing bowl can be used to seal the joint, or the fire mud sealing (structure such as Figure 3 ) is used at the same time to prevent secondary accidents caused by air suction; when the submerged nozzle reaches the slag line use limit, the method can also be used to effectively prolong the use time of the tundish.

[0035] Each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between each embodiment can be referred to each other.

[0036] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A submerged entry nozzle for avoiding tundish stoppage, characterized in that, The bowl mouth and the body are included; The body is sequentially composed of a first body, a transition layer and a second body from top to bottom; The transition layer is provided with a circumferential guide groove; The normal temperature bending strength of the transition layer is 6-7 MPa, and the strength of the first body and the second body is 9-10 MPa.

2. The submerged entry nozzle according to claim 1, wherein The width and the depth of the circumferential guide groove are both 3-5 mm.

3. The submerged entry nozzle according to claim 1, wherein The height of the transition layer is 30-50 mm.

4. The submerged entry nozzle according to claim 1, wherein A replacement nozzle matched with the submerged nozzle is further included, and the bowl mouth of the replacement nozzle is provided with a groove matched with the diameter of the body of the submerged nozzle.

5. A submerged entry nozzle according to claim 4, wherein The depth of the groove is 40-60 mm.

6. A submerged entry nozzle for avoiding tundish stoppage according to claim 4, wherein The diameter of the body of the replacement nozzle is the same as that of the body of the submerged nozzle.

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