Uniflow filtering device for secondary cooling spraying system of billet continuous casting machine

Abstract

The utility model relates to a single-flow filtering device for a secondary cooling spraying system of a billet continuous casting machine. The single-flow filtering device comprises a main path filtering assembly and a bypass filtering assembly, and the main path filter assembly and the bypass filter assembly are correspondingly arranged on cooling water paths of the secondary cooling area in parallel. The main path filtering assembly and the bypass filtering assembly are additionally arranged on each cooling water path of the secondary cooling area of the small square billet continuous casting machine, and the valves are arranged for reciprocating switching, so that the blocking rate of the nozzles in the secondary cooling area is reduced, and meanwhile, the other path can be switched after one path of filter is blocked, so that the service life of the small square billet continuous casting machine is prolonged. Therefore, the continuity and the stability of production are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical machinery, in particular to a single-flow filtering device for a secondary cooling spray system of a small square billet continuous casting machine. Background Art

[0002] In recent years, in order to increase the casting speed of the casting machine, ensure production efficiency, and control constant casting speed, stricter requirements have been placed on the secondary cooling spray system of the continuous casting machine. Blockage in the secondary cooling spray system is generally concentrated at the secondary cooling nozzle. The secondary cooling nozzle directly faces the surface of the ingot, affecting the cooling effect of the ingot. Blockage will cause deformation of the ingot and even the risk of steel leakage.

[0003] The small square billet continuous casting machine of the Second Branch of the Steelmaking Plant is a one-machine six-strand continuous casting machine. The original design of the secondary cooling spray system only installed a filter on the main pipeline. When the filter failed during production, it could not be processed online and the casting machine had to be shut down for processing, which seriously restricted production. Summary of the invention

[0004] In view of the above problems, the purpose of the utility model is to provide a single-flow filtering device for the secondary cooling spray system of a small square billet continuous casting machine, aiming to reduce the nozzle blockage rate of the secondary cooling spray system of the continuous casting machine, thereby ensuring efficient production of the casting machine.

[0005] The technical solution adopted by the utility model is as follows:

[0006] The utility model proposes a single-flow filtering device for a secondary cooling spray system of a small square billet continuous casting machine, comprising a main filtering component and a bypass filtering component; the main filtering component and the bypass filtering component are mutually connected in parallel and correspondingly arranged on each cooling water path in the secondary cooling zone.

[0007] Furthermore, the main filtering assembly includes a main water inlet valve I, a main filter and a main water inlet valve II; the main water inlet valve I, the main filter and the main water inlet valve II are sequentially arranged on the corresponding cooling water circuit.

[0008] Furthermore, the bypass filter assembly includes a bypass water inlet valve I, a bypass filter and a bypass water inlet valve II; the bypass water inlet valve I, the bypass filter and the bypass water inlet valve II are sequentially arranged on the corresponding cooling water circuit and arranged in parallel with the main filter assembly on the same cooling water circuit.

[0009] Furthermore, a pressure gauge and a flow meter are respectively provided on the main cooling water circuits at the output sides of the main filter assembly and the bypass filter assembly.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model adds a main filter device and a bypass filter assembly to each flow in the secondary cooling zone of the small square billet continuous casting machine, and is provided with a valve for reciprocating switching, thereby reducing the blockage rate of the nozzles in the secondary cooling zone and ensuring that when one of the filters is blocked, the other can be switched in time, thereby ensuring continuous and stable production. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Among them, the figure markings are: 1-main water inlet valve I; 2-main filter; 3-main water inlet valve II; 4-pressure gauge; 5-bypass water inlet valve I; 6-bypass filter; 7-bypass water inlet valve II; 8-flow meter. DETAILED DESCRIPTION

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] See attached Figure 1 The specific structure of an embodiment of a single-flow filter device for a secondary cooling spray system of a small square billet continuous casting machine proposed by the utility model is given. Taking the first cooling water circuit of the small square billet continuous casting machine as an example, the device includes a main filter assembly and a bypass filter assembly. The main filter assembly and the bypass filter assembly are arranged in parallel with each other on the first cooling water circuit of the secondary cooling zone.

[0016] The main filter assembly includes a main water inlet valve I1, a main filter 2 and a main water inlet valve II3; the main water inlet valve I1, the main filter 2 and the main water inlet valve II3 are sequentially arranged on the first cooling water path of the second cooling zone. The bypass filter assembly includes a bypass water inlet valve I5, a bypass filter 6 and a bypass water inlet valve II7; the bypass water inlet valve I5, the bypass filter 6 and the bypass water inlet valve II7 are sequentially arranged on the first cooling water path of the second cooling zone, and are arranged in parallel with the main filter assembly consisting of the main water inlet valve I1, the main filter 2 and the main water inlet valve II3 on ​​the same cooling water path.

[0017] The first cooling water channel of the second cooling zone is provided with a pressure gauge 4 and a flow meter 8, respectively. The pressure gauge 4 and the flow meter 8 are sequentially installed on the main cooling water channel at the parallel output side of the main filter assembly and the bypass filter assembly.

[0018] The working principle of the utility model is that the secondary cooling water flows into the first cooling water pipeline through the main pipeline of the casting machine, at which time the bypass water inlet valve I5 and the bypass water inlet valve II7 are both in a closed state, and no secondary cooling water passes through the bypass filter 6, which is in a standby state. The secondary cooling water flows in from the main pipeline of the first cooling water pipeline, the main water inlet valve I1 and the main water inlet valve II3 are both in an open state, the secondary cooling water flows through the main filter 2, and enters each area of ​​the secondary cooling chamber after being filtered by the main filter 2, and further cools the ingot through the nozzle. When the main filter 2 is blocked, the pressure gauge 4 and the flow meter 8 detect that the pressure value and flow value on the main cooling water line are reduced. At this time, the bypass water inlet valve I5 and the bypass water inlet valve II7 can be opened, the main water inlet valve I1 and the main water inlet valve II3 can be closed, and the secondary cooling water is filtered through the bypass filter assembly, and the main filter 2 can be cleaned at the same time. In this cycle, the blockage rate of the nozzle in the secondary cooling zone can be effectively reduced, thereby ensuring the cooling effect of the ingot and improving the quality of the ingot.

[0019] Matters not described in detail in this utility model are known technologies.

[0020] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A single-flow filtration device for a secondary cooling spray system of a billet continuous casting machine, characterized in that: The device comprises a main filter assembly and a bypass filter assembly; the main filter assembly and the bypass filter assembly are connected in parallel and arranged correspondingly on each cooling water path in the secondary cooling zone.

2. A single-flow filtration device for a secondary cooling spray system of a billet continuous casting machine according to claim 1, characterized in that: The main filtering assembly includes a main water inlet valve I, a main filter and a main water inlet valve II; the main water inlet valve I, the main filter and the main water inlet valve II are sequentially arranged on the corresponding cooling water path.

3. The single-flow filtering device for the secondary cooling spray system of a billet continuous casting machine according to claim 1, characterized in that: The bypass filter assembly includes a bypass water inlet valve I, a bypass filter and a bypass water inlet valve II; the bypass water inlet valve I, the bypass filter and the bypass water inlet valve II are sequentially arranged on the corresponding cooling water line and are arranged in parallel with the main filter assembly on the same cooling water line.

4. The single-flow filtering device for the secondary cooling spray system of a billet continuous casting machine according to claim 1, characterized in that: A pressure gauge and a flow meter are respectively provided on the main cooling water circuits at the output sides of the main filter assembly and the bypass filter assembly.

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