Anti-blocking water gap structure

Abstract

The utility model provides an anti-blocking water gap structure, which relates to the technical field of steel continuous casting water gaps, and is characterized in that a flow guide piece is of a funnel-shaped structure, the whole flow guide piece is composed of an upper liquid guide cover, a lower liquid guide cover and a vertical guide pipe, the vertical guide pipe is welded between the two liquid guide covers, the diameter of the smaller liquid guide cover is smaller than the inner diameter of a submersed water gap, and the diameter of the smaller liquid guide cover is smaller than the inner diameter of the submersed water gap. The diameter of the larger liquid guide cover is equal to the inner diameter of the submersed nozzle, so that the bottom side space of the submersed nozzle can be plugged and plugged; and two rows of circulating holes are symmetrically formed in the larger liquid guide cover. The vertical molten steel jet jetted into the liquid distribution cylinder through the two rows of circulation holes can form a certain jetting interception effect on the horizontal main molten steel jet jetted outwards through the two arc-shaped spraying grooves, and the jetting flow speed and jetting impact force of the molten steel in the crystallizer are further weakened through jetting; and the probability that the casting powder in the crystallizer is involved into the steel billet to form impurities is reduced, and the forming quality of the steel billet is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel continuous casting nozzles, in particular to an anti-blocking nozzle structure. Background Art

[0002] In continuous steel casting equipment, the submerged nozzle is a refractory casing installed at the bottom of the tundish and inserted below the molten steel level of the crystallizer. The main function of the submerged nozzle is to avoid secondary oxidation of the tundish injection flow and splashing of molten steel.

[0003] Most of the grooves (holes) on the existing submerged nozzles used for ejecting molten steel lack a mechanism that can buffer and reduce the impact force of the molten steel, causing the molten steel to be ejected into the crystallizer with a high impact force, which can easily cause liquid level fluctuations and easily draw the protective slag of the crystallizer into the steel billet to form impurities, affecting the forming quality of the steel billet. Utility Model Content

[0004] In view of this, the utility model provides an anti-clogging water inlet structure to solve the problem that most of the grooves (holes) used for spraying and discharging molten steel lack a mechanism that can buffer and weaken the impact force of the molten steel, resulting in molten steel being sprayed into the crystallizer with a high impact force, which easily causes liquid level fluctuations and affects the forming quality of the steel billet.

[0005] The technical solution proposed by the utility model is: an anti-blocking water inlet structure, specifically comprising an immersion water inlet and a flow guide; the flow guide is inserted and fixed in the bottom space of the immersion water inlet;

[0006] The flow guide is a funnel-shaped structure, and the flow guide is composed of two liquid guide covers, one small and one large, and a vertical conduit welded between the two liquid guide covers, wherein the diameter of the smaller liquid guide cover is smaller than the inner diameter of the immersion water outlet, and the diameter of the larger liquid guide cover is equal to the inner diameter of the immersion water outlet, and can be plugged and blocked to seal the bottom space of the immersion water outlet; a liquid distributing cylinder is welded to the bottom of the larger liquid guide cover, and two arc-shaped spraying grooves are symmetrically opened on the circumferential outer wall of the liquid distributing cylinder; two arc-shaped liquid outlets are symmetrically opened on the bottom side of the circumferential side wall of the immersion water outlet, and the two arc-shaped liquid outlets correspond to and overlap with the two arc-shaped spraying grooves;

[0007] The larger liquid guide cover is symmetrically provided with two rows of flow holes, which are vertically connected with the two arc-shaped spray slots. The molten steel is sprayed into the crystallizer in sequence through the smaller liquid guide cover, the vertical conduit, the larger liquid guide cover, the liquid distribution cylinder, the two arc-shaped spray slots and the two arc-shaped liquid outlets.

[0008] Furthermore,

[0009] A butt ring is welded at the top of the submerged nozzle, and a threaded block is welded at the center of the bottom wall of the submerged nozzle.

[0010] Furthermore,

[0011] A threaded shaft is rotatably mounted at the center of the bottom wall of the liquid distributing cylinder. The threaded shaft passes through the bottom wall of the liquid distributing cylinder and is screwed together with the threaded block.

[0012] Furthermore,

[0013] The bottom side of the threaded shaft is divided into a hexagonal structure.

[0014] Furthermore,

[0015] The portion of the threaded shaft close to the liquid dispensing cylinder is provided with an external thread, and the remaining portion is a polished rod.

[0016] Furthermore,

[0017] The two liquid-conducting covers are arranged to face each other up and down, and an annular flow groove is formed between the smaller liquid-conducting cover and the inner wall of the immersion water outlet.

[0018] Furthermore,

[0019] The molten steel flows through the annular flow groove and is transported to the two rows of flow holes.

[0020] The utility model provides an anti-clogging water outlet structure, which has the following beneficial effects:

[0021] When the utility model is in use, most of the molten steel is sprayed into the crystallizer in sequence through the smaller liquid guide cover, the vertical conduit, the larger liquid guide cover, the liquid distribution cylinder, the two arc-shaped spray grooves and the two arc-shaped liquid outlets. Such a circuitous flow path can consume the flow kinetic energy of the molten steel to a certain extent, and weaken the flow rate and the injection impact force of the molten steel to a certain extent. A small part of the molten steel is sprayed into the liquid distribution cylinder through the annular flow groove and the two rows of flow holes for discharge. The vertical molten steel jet sprayed into the liquid distribution cylinder through the two rows of flow holes can form a certain injection interception effect on the horizontal main molten steel jet sprayed outward through the two arc-shaped spray grooves, further counteract and weaken the ejection flow rate and the injection impact force of the molten steel in the crystallizer, reduce the liquid level fluctuation in the crystallizer, reduce the probability of the protective slag in the crystallizer being drawn into the steel billet to form impurities, and help to improve the forming quality of the steel billet.

[0022] In addition, the forward and reverse rotation of the threaded shaft can push and drive the guide piece to slide up and down, breaking the knot between the guide piece and the immersion nozzle, making it convenient to disassemble and replace the guide piece. In addition, when the guide piece slides upward and the external thread on the threaded shaft is disengaged from the threaded block, the bare rod section of the threaded shaft can slide freely relative to the threaded block and the bottom wall of the immersion nozzle. At this time, the knot can be further loosened by hammering the threaded shaft, thereby further improving the convenience of disassembly of the guide piece in the immersion nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0024] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0025] In the attached picture:

[0026] Figure 1 The overall structure schematic diagram of the utility model is shown;

[0027] Figure 2 The overall bottom side structural schematic diagram of the utility model is shown;

[0028] Figure 3 A schematic diagram of the inner side structure of a half-section of the submerged nozzle of the utility model is shown;

[0029] Figure 4 The schematic diagram of the structure of the flow guide member of the utility model in the disassembly and assembly state is shown;

[0030] Figure 5 The schematic diagram of the structure of the flow guide member of the utility model is shown;

[0031] Figure 6 A schematic diagram of the inner side structure of a half-section of the flow guide of the utility model is shown;

[0032] Reference numerals list

[0033] 1. Immersed water inlet; 101. Arc-shaped liquid outlet; 102. Threaded block;

[0034] 2. Flow guide; 201. Liquid distribution cylinder; 202. Flow hole; 203. Threaded shaft; 204. Arc-shaped spray slot. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Example 1, please refer to Figures 1 to 6 :

[0037] The utility model proposes an anti-clogging water inlet structure, comprising an immersion water inlet 1 and a flow guide 2; the flow guide 2 is inserted and fixed in the bottom space of the immersion water inlet 1;

[0038] The flow guide 2 is a funnel-shaped structure, and the flow guide 2 as a whole is composed of two liquid guide covers, one small and one large, and a vertical conduit welded between the two liquid guide covers, wherein the diameter of the smaller liquid guide cover is smaller than the inner diameter of the immersion water outlet 1, and the diameter of the larger liquid guide cover is equal to the inner diameter of the immersion water outlet 1, and can be plugged and blocked to block the bottom side space of the immersion water outlet 1; a liquid distributing cylinder 201 is welded to the bottom of the larger liquid distributing cylinder, and two arc-shaped spraying grooves 204 are symmetrically opened on the circumferential outer wall of the liquid distributing cylinder 201; two arc-shaped liquid outlets 101 are symmetrically opened on the bottom side of the circumferential side wall of the immersion water outlet 1, and the two arc-shaped liquid outlets 101 correspond to the two arc-shaped spraying grooves 204;

[0039] The larger liquid guide cover is symmetrically provided with two rows of flow holes 202, which are vertically connected with the two arc-shaped spray slots 204. Most of the molten steel is sequentially sprayed into the crystallizer through the smaller liquid guide cover, the vertical conduit, the larger liquid guide cover, the liquid distribution cylinder 201, the two arc-shaped spray slots 204 and the two arc-shaped liquid outlets 101. Such a circuitous flow path can consume the flow kinetic energy of the molten steel to a certain extent, and weaken the flow rate and injection impact of the molten steel to a certain extent. In addition, a small part of the molten steel is sprayed into the crystallizer through the annular flow path. The grooves and two rows of flow holes 202 are sprayed into the liquid distribution cylinder 201 for discharge. The vertical molten steel jet injected into the liquid distribution cylinder 201 through the two rows of flow holes 202 can form a certain impact interception effect on the horizontal main molten steel jet injected outward through the two arc-shaped spray grooves 204, further offset and weaken the ejection flow rate and injection impact force of the molten steel in the crystallizer, reduce the liquid level fluctuation in the crystallizer, and reduce the probability of the protective slag in the crystallizer being drawn into the steel billet to form impurities, which helps to improve the forming quality of the steel billet.

[0040] Based on the first embodiment, the second embodiment:

[0041] A butt ring is welded to the top of the submerged nozzle 1 , and a threaded block 102 is welded to the center of the bottom wall of the submerged nozzle 1 .

[0042] Specifically,

[0043] A threaded shaft 203 is rotatably installed at the center position of the bottom wall of the liquid distributing cylinder 201. The threaded shaft 203 passes through the bottom wall of the liquid distributing cylinder 201 and is screwed together with the threaded block 102. The threaded shaft 203 is used to lock and fix the guide piece 2 and the bottom wall of the immersion water outlet 1 together, so that the guide piece 2 is fixed in the bottom side space of the immersion water outlet 1, and the forward and reverse rotation of the threaded shaft 203 can drive the guide piece 2 to slide up and down, breaking the knot between the guide piece 2 and the immersion water outlet 1, so as to facilitate the disassembly and replacement of the guide piece 2. In addition, when the guide piece 2 slides upward and the external thread on the threaded shaft 203 is disengaged from the threaded block 102, the bare rod section of the threaded shaft 203 can slide freely relative to the threaded block 102 and the bottom wall of the immersion water outlet 1. At this time, the knot can be further loosened by hammering the threaded shaft 203, thereby further improving the convenience of disassembly of the guide piece 2 in the immersion water outlet 1.

[0044] Specifically,

[0045] The bottom side of the threaded shaft 203 is divided into a hexagonal structure.

[0046] Specifically,

[0047] The portion of the threaded shaft 203 close to the liquid dispensing cylinder 201 is provided with an external thread, and the remaining portion is a polished rod.

[0048] Specifically,

[0049] The two liquid-conducting covers are arranged to face each other up and down, and an annular flow groove is formed between the smaller liquid-conducting cover and the inner wall of the immersion water inlet 1 .

[0050] Specifically,

[0051] The molten steel flows through the annular flow groove and is transported to the two rows of flow holes 202.

[0052] The working principle of this embodiment is as follows: when in use, most of the molten steel is sequentially sprayed into the crystallizer through the smaller liquid guide cover, the vertical conduit, the larger liquid guide cover, the liquid distribution cylinder 201, the two arc-shaped spray slots 204 and the two arc-shaped liquid outlets 101. Such a circuitous flow path can consume the circulation kinetic energy of the molten steel to a certain extent, and weaken the flow rate and the injection impact force of the molten steel to a certain extent. A small part of the molten steel is sprayed into the liquid distribution cylinder 201 through the annular flow groove and the two rows of flow holes 202 for discharge. The vertical molten steel jet sprayed into the liquid distribution cylinder 201 through the two rows of flow holes 202 can form a certain impact interception effect on the main molten steel jet in the horizontal state sprayed outward through the two arc-shaped spray slots 204, further counteracting and weakening the ejection flow rate and injection impact force of the molten steel in the crystallizer;

[0053] The threaded shaft 203 is used to lock and fix the guide piece 2 and the bottom wall of the immersion nozzle 1 together, so that the guide piece 2 is fixed in the bottom side space of the immersion nozzle 1, and the forward and reverse rotation of the threaded shaft 203 can drive the guide piece 2 to slide up and down, breaking the knot between the guide piece 2 and the immersion nozzle 1, so as to facilitate the disassembly and replacement of the guide piece 2. In addition, when the guide piece 2 slides upward and the external thread on the threaded shaft 203 is disengaged from the threaded block 102, the bare rod section of the threaded shaft 203 can slide freely relative to the threaded block 102 and the bottom wall of the immersion nozzle 1. At this time, the knot can be further loosened by hammering the threaded shaft 203, thereby further improving the convenience of disassembly of the guide piece 2 in the immersion nozzle 1.

[0054] In this article, there are a few points to note:

[0055] 1. The drawings of the embodiments of the present utility model only relate to the structures related to the embodiments of the present utility model, and other structures may refer to the usual designs.

[0056] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0057] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An anti-clogging water outlet structure, comprising: An immersion-type water inlet (1) and a flow guide (2); the flow guide (2) is inserted and fixed in the bottom space of the immersion-type water inlet (1); The invention is characterized in that the flow guide (2) is of a funnel-shaped structure, and the flow guide (2) as a whole is composed of two liquid guide covers, one small and one large, and a vertical conduit welded between the two liquid guide covers, wherein the diameter of the smaller liquid guide cover is smaller than the inner diameter of the immersion water outlet (1), and the diameter of the larger liquid guide cover is equal to the inner diameter of the immersion water outlet (1) and can be plugged and sealed to block the bottom side space of the immersion water outlet (1); a liquid distributing cylinder (201) is welded to the bottom of the larger liquid distributing cylinder, and two arc-shaped spraying grooves (204) are symmetrically opened on the circumferential outer wall of the liquid distributing cylinder (201); two arc-shaped liquid outlets (101) are symmetrically opened on the bottom side of the circumferential side wall of the immersion water outlet (1), and the two arc-shaped liquid outlets (101) correspond to and overlap with the two arc-shaped spraying grooves (204); The larger liquid guide cover is symmetrically provided with two rows of flow holes (202), which are vertically connected to the two arc-shaped spray slots (204). The molten steel is sequentially sprayed into the crystallizer through the smaller liquid guide cover, the vertical conduit, the larger liquid guide cover, the liquid distribution cylinder (201), the two arc-shaped spray slots (204) and the two arc-shaped liquid outlets (101).

2. The anti-clogging water outlet structure according to claim 1, characterized in that: A butt ring is welded to the top of the submerged nozzle (1), and a threaded block (102) is welded to the center of the bottom wall of the submerged nozzle (1).

3. The anti-clogging water outlet structure according to claim 2, characterized in that: A threaded shaft (203) is rotatably mounted at the center of the bottom wall of the liquid distributing cylinder (201), and the threaded shaft (203) passes through the bottom wall of the liquid distributing cylinder (201) and is screwed together with the threaded block (102).

4. The anti-clogging water outlet structure according to claim 3, characterized in that: The bottom side of the threaded shaft (203) is divided into a hexagonal structure.

5. The anti-clogging water outlet structure according to claim 3, characterized in that: The portion of the threaded shaft (203) close to the liquid dispensing cylinder (201) is provided with an external thread, and the remaining portion is a smooth rod.

6. The anti-clogging water outlet structure according to claim 1, characterized in that: The two liquid-conducting covers are arranged facing each other up and down, and an annular flow groove is formed between the smaller liquid-conducting cover and the inner wall of the immersion water inlet (1).

7. The anti-clogging water outlet structure according to claim 6, characterized in that: The molten steel flows through the annular circulation groove and is transported to the two rows of circulation holes (202).

Images