Circulating water pipeline grid connection device of blast furnace

Abstract

The utility model discloses a blast furnace circulating water pipeline grid-connection device which comprises a clean circulating water tank, the clean circulating water tank is connected with a medium-pressure pipeline through a medium-pressure pump, and the clean circulating water tank is connected with a low-pressure pipeline through a low-pressure pump. The front portion of the first check valve and the first butterfly valve on the medium-pressure pipeline are connected through a water outlet pipeline, the front portion of the second check valve and the second butterfly valve on the low-pressure pipeline are connected through a water outlet pipeline, and a flow adjusting valve mechanism is arranged on the water outlet pipeline. The utility model has the beneficial effects that the medium-pressure pipeline and the low-pressure pipeline work in a grid-connected manner, the medium-pressure pump is directly started to supply water when the blast furnace supplies water, one part is supplied to a blast furnace gun, a tapping machine and a furnace throat steel brick in the original way, and the other part flows to a dust removal station, a coal injection station and a hydraulic station through the water outlet pipeline via the original low-pressure pipeline, so that the original water supply cooling requirement is not influenced; starting of the low-pressure pump can be stopped, power consumption is reduced, and meanwhile maintenance cost of the low-pressure pump motor and the water pump is saved.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace circulating water technology, specifically a blast furnace circulating water pipeline grid connection device. Background Technology

[0002] The circulating water in the blast furnace feedwater system is mainly used for cooling the blast furnace and hot blast stove, providing water for the blower station, and spraying water for slag granulation and dry slag treatment. During use, some of the water is only heated, while another portion is not only heated but also contaminated. The uncontaminated hot wastewater is cooled and then recycled.

[0003] Blast furnace circulating water pipelines are hydraulic pipelines that run along a loop, collecting and discharging water at different locations. They are mainly used in blast furnace-related systems to transport water, hot water, steam, or other media. The circulating water pump room in the blast furnace workshop of an ironmaking plant plays a crucial role in providing stable water pressure to various production areas within the plant. However, long-term operational monitoring has revealed that the medium-pressure pumps have relatively low operating efficiency, and the medium-pressure pump pipelines are generally located close to the low-pressure pump pipelines, increasing electrical energy consumption and maintenance costs. Utility Model Content

[0004] To address the above deficiencies, this utility model provides a blast furnace circulating water pipeline grid connection device to solve the problem of connecting the high-pressure and low-pressure pipelines of the blast furnace circulating water system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A blast furnace circulating water pipeline grid connection device includes a clean circulating water tank, which is connected to a medium-pressure pipeline via a medium-pressure pump. A check valve and a butterfly valve are respectively installed on the medium-pressure pipeline.

[0007] The clean circulating water tank is connected to a low-pressure pipeline via a low-pressure pump, and a check valve and a butterfly valve are installed on the low-pressure pipeline respectively.

[0008] The first check valve and the first butterfly valve on the medium-pressure pipeline are connected to the second check valve and the second butterfly valve on the low-pressure pipeline via a water outlet pipeline.

[0009] The water outlet pipe is equipped with a flow regulating valve mechanism.

[0010] Furthermore, the flow regulating valve mechanism includes a valve body, a regulating motor, an inner shell, a first connecting rod, a second connecting rod, and a valve. The valve body is installed at the center of the outlet pipe, the regulating motor is installed at the front end of the valve body, the inner shell is fixedly installed inside the valve body, and the rotating end of the regulating motor is movably inserted into the inner shell. The first connecting rod is installed on the rotating end of the regulating motor, the second connecting rod is hinged to the front end of the first connecting rod, and the valve is slidably and sealingly installed in the inner shell, with its right inner end hinged to the second connecting rod.

[0011] Furthermore, the valve includes a sealing part and a flow guiding part, and the flow guiding part has a plurality of strip-shaped holes evenly distributed on it.

[0012] Furthermore, the diameter of the medium-pressure pipe is larger than that of the low-pressure pipe, and the diameter of the low-pressure pipe is the same as that of the outlet pipe.

[0013] Furthermore, the medium-pressure pipeline supplies water to external blast furnace mud guns, opening machines, furnace throat steel bricks, etc. via a water supply pipe.

[0014] Furthermore, the low-pressure pipeline supplies water to external dust removal, pulverized coal injection, hydraulic stations, etc., via water supply pipe two.

[0015] This utility model provides a blast furnace circulating water pipeline grid connection device, which has the following beneficial effects: the first check valve and the second butterfly valve on the medium-pressure pipeline are connected to the second check valve and the second butterfly valve on the low-pressure pipeline through the water outlet pipeline, realizing the grid connection of the medium-pressure pipeline and the low-pressure pipeline. When the blast furnace is supplied with water, the medium-pressure pump is directly started to supply water. Part of the water is supplied to the blast furnace mud gun, the opening machine and the steel brick of the furnace throat through the original route, and the other part flows through the water outlet pipeline to the dust removal, pulverized coal injection and hydraulic station through the original low-pressure pipeline. It does not affect the original water supply and cooling needs, and can also stop the low-pressure pump to start to reduce power consumption, while saving various maintenance costs of the low-pressure pump motor and water pump. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a blast furnace circulating water pipeline grid connection device according to the present invention.

[0017] Figure 2 This is a schematic diagram of the flow regulating valve mechanism of this utility model.

[0018] Figure 3 This is an external view of the inner shell of the present invention.

[0019] Figure 4 This is an external view of the valve described in this utility model.

[0020] In the diagram: 1. Clean circulating water tank; 2. Medium-pressure pump; 3. Medium-pressure pipeline; 4. Check valve one; 5. Butterfly valve one; 6. Low-pressure pump; 7. Low-pressure pipeline; 8. Check valve two; 9. Butterfly valve two; 10. Outlet pipeline; 11. Valve body; 12. Regulating motor; 13. Inner shell; 14. Connecting rod one; 15. Connecting rod two; 16. Valve; 17. Sealing part; 18. Flow guide part; 19. Strip hole; 20. Water supply pipe one; 21. Water supply pipe two. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] Please see Figures 1 to 4 As shown in the figure, this application provides a blast furnace circulating water pipeline grid connection device, including a clean circulating water tank 1. The clean circulating water tank 1 is connected to a medium-pressure pipeline 3 via a medium-pressure pump 2. A check valve 4 and a butterfly valve 5 are respectively installed on the medium-pressure pipeline 3. The clean circulating water tank 1 is connected to a low-pressure pipeline 7 via a low-pressure pump 6. A check valve 8 and a butterfly valve 9 are respectively installed on the low-pressure pipeline 7. The section between check valve 4 and butterfly valve 5 on the medium-pressure pipeline 3 is connected to the section between check valve 8 and butterfly valve 9 on the low-pressure pipeline 7 via a water outlet pipeline 10. A flow regulating valve mechanism is provided on the water outlet pipeline 10.

[0023] In this embodiment, the check valve 4 and butterfly valve 5 on the medium-pressure pipeline 3 are connected to the check valve 8 and butterfly valve 9 on the low-pressure pipeline 7 via the water outlet pipeline 10, so that the medium-pressure pipeline 3 and the low-pressure pipeline 7 can work in parallel. When the blast furnace is supplied with water, the medium-pressure pump 2 can be started directly to supply water. Part of the water is supplied to the blast furnace mud gun, the opening machine and the steel brick of the furnace throat, and the other part flows through the new water outlet pipeline 10 to the dust removal, pulverized coal injection and hydraulic station via the original low-pressure pipeline 7. This does not affect the original water supply and cooling needs, and the low-pressure pump 6 can be stopped to reduce power consumption. At the same time, it saves the maintenance costs of the motor and water pump of the low-pressure pump 6.

[0024] In some embodiments, the flow regulating valve mechanism includes a valve body 11, a regulating motor 12, an inner shell 13, a first connecting rod 14, a second connecting rod 15, and a valve 16. The valve body 11 is installed at the center of the water outlet pipe 10, the regulating motor 12 is installed at the front end of the valve body 11, the inner shell 13 is fixedly installed inside the valve body 11, and the rotating end of the regulating motor 12 is movably inserted into the inner shell 13 through a sealed bearing. The first connecting rod 14 is installed on the rotating end of the regulating motor 12, the second connecting rod 15 is hinged to the front end of the first connecting rod 14, and the valve 16 is slidably and sealingly installed in the inner shell 13, with its inner right end hinged to the second connecting rod 15.

[0025] The valve 16 includes a sealing part 17 and a flow guiding part 18, and the flow guiding part 18 has a number of strip-shaped holes 19 evenly distributed on it.

[0026] and collection of appendices Figure 2 —Appendix Figure 4As shown, the regulating motor 12 can pull the valve 16 to move within the inner shell 13 via connecting rod 14 and connecting rod 2 15. When the sealing part 17 of the valve 16 extends out of the inner shell 13, it can perform the function of blocking the flow. When the flow guiding part 18 of the valve 16 extends out of the inner shell 13, it can perform the function of guiding the flow. Furthermore, the user can adjust the position of the valve 16 by regulating the motor 12 to achieve the function of flow regulation, which is convenient to use.

[0027] In some embodiments, the diameter of the medium-pressure pipe 3 is larger than that of the low-pressure pipe 7. The medium-pressure pipe 3 is φ300mm, and the diameter of the low-pressure pipe 7 is the same as that of the outlet pipe 10, which is φ200mm.

[0028] In some embodiments, the medium-pressure pipeline 3 supplies water to external blast furnace mud guns, opening machines, furnace throat steel bricks, etc., via the water supply pipe 20.

[0029] In some embodiments, the low-pressure pipeline 7 supplies water to external dust removal, pulverized coal injection, hydraulic stations, etc., via the water supply pipe 21.

[0030] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A blast furnace circulating water pipeline grid-connected device, comprising a clean circulating water pool (1), characterized in that, The clean circulating water tank (1) is connected to a medium-pressure pipeline (3) via a medium-pressure pump (2). A check valve (4) and a butterfly valve (5) are installed on the medium-pressure pipeline (3). The clean circulating water tank (1) is connected to a low-pressure pipeline (7) via a low-pressure pump (6), and a check valve (8) and a butterfly valve (9) are installed on the low-pressure pipeline (7). The medium-pressure pipeline (3) is connected to the check valve (4) and butterfly valve (5) in front of the check valve (4) and butterfly valve (5) in front of the check valve (8) and butterfly valve (9) in the low-pressure pipeline (7) via the outlet pipeline (10); The water outlet pipe (10) is equipped with a flow regulating valve mechanism.

2. The blast furnace circulating water pipeline grid-connected device according to claim 1, characterized in that, The flow regulating valve mechanism includes a valve body (11), a regulating motor (12), an inner shell (13), a connecting rod one (14), a connecting rod two (15), and a valve (16). The valve body (11) is installed at the center of the water outlet pipe (10). The regulating motor (12) is installed at the front end of the valve body (11). The inner shell (13) is fixedly installed inside the valve body (11), and the rotating end of the regulating motor (12) is movably inserted into the inner shell (13). The connecting rod one (14) is installed on the rotating end of the regulating motor (12). The connecting rod two (15) is hinged to the front end of the connecting rod one (14). The valve (16) is slidably and sealed in the inner shell (13), and its inner right end is hinged to the connecting rod two (15).

3. The blast furnace circulating water pipeline grid-connected device according to claim 2, characterized in that, The valve (16) includes a sealing part (17) and a flow guiding part (18), and the flow guiding part (18) has a number of strip holes (19) evenly distributed on it.

4. The blast furnace circulating water pipeline grid-connected device according to claim 1, characterized in that, The diameter of the medium-pressure pipe (3) is larger than that of the low-pressure pipe (7), and the diameter of the low-pressure pipe (7) is the same as that of the outlet pipe (10).

5. The device according to claim 1, wherein, The medium-pressure pipeline (3) supplies water to the external blast furnace mud gun, opening machine, and furnace throat steel bricks through water supply pipe (20).

6. The blast furnace circulating water pipeline grid-connected device according to claim 1, characterized in that, The low-pressure pipeline (7) supplies water to the external dust removal, coal injection, and hydraulic station via water supply pipe two (21).

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