Secondary cooling aerial fog nozzle of continuous casting machine

Abstract

The utility model discloses a secondary cooling aerial fog nozzle of a continuous casting machine. The secondary cooling aerial fog nozzle comprises a nozzle body, the nozzle head can be installed on the nozzle body in an up-down sliding mode, the upper end of the nozzle head extends out of the nozzle body, the lower end of the nozzle head is in sliding sealing fit with the inner wall of the nozzle body, and a spraying opening is formed in the upper end of the nozzle head; the compression spring is sleeved on the nozzle head, the upper end of the compression spring is propped against the nozzle body, and the lower end of the compression spring is propped against the nozzle head; the adapter is arranged at the lower end of the nozzle body; and the nozzle core is arranged in the nozzle and comprises a fixing frame arranged at the upper end of the adapter, a central shaft arranged on the central axis of the fixing frame and a nozzle plug which is arranged at the upper end of the central shaft and is in sliding sealing fit with the nozzle. The nozzle with the design is not easy to block and can be used for a long time.

Description

Technical Field

[0001] This utility model relates to the field of nozzles, and in particular to a secondary cooling mist nozzle for a continuous casting machine. Background Technology

[0002] In continuous casting equipment, the heat exchange process of the billet in the mold through the closed-loop cooling water of the mold is usually called primary cooling. The cooling process of continuing to spray water on the billet after it exits the mold until the transverse section of the billet is completely solidified is called secondary cooling. The area from when the billet exits the mold to when it is completely solidified is called the secondary cooling zone.

[0003] The existing continuous casting production environment is poor, and the cooling water on site is easily contaminated, which can easily mix in iron oxide scale, protective slag and other impurities. As a result, the cooling mist nozzles are often blocked, causing the continuous castings to not be cooled in time. Utility Model Content

[0004] The purpose of this invention is to provide a secondary cooling mist nozzle for continuous casting machines that is less prone to clogging.

[0005] The purpose of this utility model is achieved as follows: A secondary cooling mist nozzle for a continuous casting machine includes a nozzle body; a nozzle head, which is slidably mounted on the nozzle body, with its upper end extending out of the nozzle body and its lower end slidingly sealing against the inner wall of the nozzle body, and the upper end of the nozzle head having a nozzle orifice; a compression spring, which is fitted onto the nozzle head, with its upper end abutting against the nozzle body and its lower end abutting against the nozzle head; an adapter, which is located at the lower end of the nozzle body; and a nozzle core, which is located inside the nozzle and includes a fixing frame located at the upper end of the adapter, a central shaft located on the central axis of the fixing frame, and a nozzle plug located at the upper end of the central shaft that slides and seals against the nozzle orifice.

[0006] Compared with the prior art, the beneficial effects of this utility model are as follows: the nozzle provided by this utility model is not easily clogged and can be used for a long time; specifically, the nozzle head is designed to be retractable and movable. When the nozzle stops working, the nozzle head will retract, and the nozzle plug will cooperate with the nozzle to block it, cleaning the nozzle while preventing external dirt from entering the nozzle; in addition, the nozzle head is designed to be rotatable, and a spiral blade is set inside it that slides with the inner wall of the nozzle head. The spiral blade facilitates the formation of spiral water flow inside the nozzle head, thereby strengthening the flushing force of the water flow on the inner wall of the nozzle head, making it less likely for scale to accumulate on the inner wall of the nozzle head; rotating the nozzle head allows the outer end of the spiral blade to slide relative to the inner wall of the nozzle head, thereby cleaning the inner wall of the nozzle head and removing the scale on the inner wall of the nozzle head in time, preventing the scale from thickening and falling off to block the nozzle.

[0007] As a preferred embodiment of this utility model, the central shaft is provided with spiral blades that are spirally distributed along its length and whose outer ends slide in engagement with the inner wall of the nozzle head. The nozzle also includes a guide sleeve, the upper end of which is fixed to the nozzle head, and the lower end of which is sleeved on the outside of the nozzle body and slides in engagement with it. The guide sleeve is provided with two symmetrically arranged sliding grooves, and each of the sliding grooves is provided with a limiting screw fixed to the nozzle body and slidingly engaging with the sliding groove. This design facilitates timely cleaning of the inner wall of the nozzle head, thereby further reducing the possibility of clogging.

[0008] As a preferred embodiment of this utility model, the aforementioned fixing frame includes an outer ring, a central ring located on the central axis inside the outer ring, and a plurality of vortex blades symmetrically distributed at both ends and fixed to the outer ring and the central ring respectively; the lower end of the aforementioned central shaft is fixed to the central ring. This design can further enhance the swirling flow inside the nozzle head, thereby reducing the possibility of fouling on the inner wall of the nozzle head.

[0009] Furthermore, the aforementioned guide sleeve and nozzle head, nozzle body and adapter, and mounting bracket and adapter are all fixedly connected by threads. This design facilitates installation and ensures reliable connection.

[0010] Furthermore, the water inlet of the aforementioned adapter is equipped with a filter screen. This design can filter out larger impurities in the cooling water, thereby reducing the possibility of nozzle clogging.

[0011] Furthermore, several sliding sealing rings are provided at the sliding sealing joint between the lower end of the nozzle head and the inner wall of the nozzle body. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention, in which the nozzle orifice is in a closed state.

[0013] The components include: 1. Nozzle body; 2. Nozzle head; 2a. Nozzle port; 2b. Sliding sealing ring; 3. Compression spring; 4. Adaptor; 4a. Filter screen; 5. Fixing bracket; 5a. Outer ring; 5b. Central ring; 5c. Vortex blade; 6. Central shaft; 6a. Helical blade; 7. Nozzle plug; 8. Guide sleeve; 8a. Slide groove; 8b. Limiting screw. Detailed Implementation

[0014] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0015] Combined with appendix Figure 1As shown, a secondary cooling mist nozzle for a continuous casting machine includes a nozzle body 1; a nozzle head 2, which is slidably mounted on the nozzle body 1, with its upper end extending out of the nozzle body 1 and its lower end slidingly sealing against the inner wall of the nozzle body 1, and the upper end of the nozzle head 2 having a nozzle orifice 2a; a compression spring 3, which is fitted onto the nozzle head 2, with its upper end abutting against the nozzle body 1 and its lower end abutting against the nozzle head 2; an adapter 4, which is disposed at the lower end of the nozzle body 1; and a nozzle core, which is disposed inside the nozzle and includes a fixing frame 5 disposed at the upper end of the adapter 4, a central shaft 6 disposed on the central axis of the fixing frame 5, and a nozzle plug 7 disposed at the upper end of the central shaft 6 and slidingly sealing against the nozzle orifice 2a.

[0016] The central shaft 6 is provided with spiral blades 6a that are spirally distributed along its length and whose outer ends slide in engagement with the inner wall of the nozzle head 2; the nozzle also includes a guide sleeve 8, the upper end of which is fixed to the nozzle head 2 and the lower end of which is sleeved on the outside of the nozzle body 1 and slides in engagement with it; the guide sleeve 8 is provided with two symmetrically arranged sliding grooves 8a, and each of the sliding grooves 8a is provided with a limiting screw 8b fixed to the nozzle body 1 and slides in engagement with the sliding groove 8a; it should be noted that there can be one or several sliding grooves 8a, all of which can play the role of preventing the nozzle head 2 from rotating.

[0017] The aforementioned fixing frame 5 includes an outer ring 5a, a central ring 5b located on the central axis inside the outer ring 5a, and a number of vortex blades 5c that are centrally symmetrically distributed and fixed at both ends to the outer ring 5a and the central ring 5b respectively; the lower end of the aforementioned central shaft 6 is fixed to the central ring 5b; it should be noted that the spiral directions of the aforementioned vortex blades 5c and spiral blades 6a are the same.

[0018] The guide sleeve 8 and the nozzle head 2, the nozzle body 1 and the adapter 4, and the fixing bracket 5 and the adapter 4 are all fixedly connected by threads.

[0019] The water inlet end of the aforementioned adapter 4 is equipped with a filter screen 4a.

[0020] Several sliding sealing rings 2b are provided at the sliding sealing joint between the lower end of the nozzle head 2 and the inner wall of the nozzle body 1.

[0021] During operation, cooling water enters from the lower end of the adapter 4. As the water flow increases, the internal pressure of the nozzle increases, and the nozzle head 2 gradually moves upward under the action of water pressure. The compression spring 3 is gradually compressed, and the nozzle 2a gradually disengages from the nozzle plug 7. The nozzle 2a opens, and the cooling water is sprayed out from the nozzle 2a after being guided by the fixed frame 5 and the spiral blade 6a. After the spraying ends, the nozzle head 2 retracts under the action of the compression spring 3, and the nozzle plug 7 re-engages with the nozzle 2a to seal it.

[0022] It should be noted that, due to the presence of the limit screw 8b and the slide groove 8a, the nozzle head 2 can only move up and down at this time, but cannot rotate.

[0023] When cleaning the inner wall of the nozzle head 2, first unscrew the limit screw 8b; then rotate the nozzle head 2 so that the inner wall of the nozzle head 2 slides relative to the spiral blade 6a, thereby cleaning the scale buildup on the inner wall of the nozzle head 2; finally, reconnect the cooling water, and the cooling water will flush the spiral blade 6a, flushing out the dirt cleaned off its outer end from the nozzle 2a.

[0024] It should be noted that the cleaning of the inner wall of nozzle head 2 needs to be done frequently to avoid cleaning when the scale buildup becomes too thick and large, as this can easily clog the nozzle.

[0025] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A secondary cooling mist nozzle for a continuous casting machine, characterized in that: The aerosol nozzle includes Nozzle body (1); Nozzle head (2), the nozzle head (2) is slidably mounted on the nozzle body (1), its upper end extends out of the nozzle body (1), and its lower end slides and seals with the inner wall of the nozzle body (1). The upper end of the nozzle head (2) is provided with a nozzle (2a). Compression spring (3), the compression spring (3) is fitted on the nozzle head (2), its upper end abuts against the nozzle body (1), and its lower end abuts against the nozzle head (2); Adapter (4), said adapter (4) is located at the lower end of nozzle body (1); The nozzle core is located inside the nozzle and includes a fixed frame (5) located at the upper end of the adapter (4), a central shaft (6) located on the central axis of the fixed frame (5), and a nozzle plug (7) located at the upper end of the central shaft (6) and slidingly sealingly cooperating with the nozzle (2a).

2. The secondary cooling mist nozzle for a continuous casting machine according to claim 1, characterized in that: The central shaft (6) is provided with spiral blades (6a) that are spirally distributed along its length and whose outer ends slide in contact with the inner wall of the nozzle head (2). The nozzle also includes a guide sleeve (8), the upper end of which is fixed on the nozzle head (2), and the lower end of which is sleeved on the outside of the nozzle body (1) and slidably engaged with it; the guide sleeve (8) is provided with two symmetrically arranged sliding grooves (8a), and each sliding groove (8a) is provided with a limiting screw (8b) fixed on the nozzle body (1) and slidably engaged with the sliding groove (8a).

3. The secondary cooling mist nozzle for a continuous casting machine according to claim 2, characterized in that: The fixing frame (5) includes an outer ring (5a), a central ring (5b) located on the central axis inside the outer ring (5a), and a number of vortex blades (5c) that are centrally symmetrically distributed and fixed at both ends to the outer ring (5a) and the central ring (5b), respectively; the lower end of the central shaft (6) is fixed to the central ring (5b).

4. The secondary cooling mist nozzle for a continuous casting machine according to claim 3, characterized in that: The guide sleeve (8) and the nozzle head (2), the nozzle body (1) and the adapter (4), and the fixing bracket (5) and the adapter (4) are all fixedly connected by threads.

5. A secondary cooling mist nozzle for a continuous casting machine according to any one of claims 1 to 4, characterized in that: The adapter (4) is equipped with a filter screen (4a) at the water inlet end.

6. A secondary cooling mist nozzle for a continuous casting machine according to any one of claims 1 to 4, characterized in that: The lower end of the nozzle head (2) is provided with several sliding sealing rings (2b) at the sliding sealing joint between the nozzle head (2) and the inner wall of the nozzle body (1).

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