A furnace roof water-spraying, water-leakage-preventing and freezing-preventing structure

Abstract

This utility model relates to a leak-proof and freeze-proof structure for furnace top water supply, including a leak-proof and freeze-proof pipe. The leak-proof and freeze-proof pipe includes a connecting section and a drain section. Two connecting sections are directly connected and respectively disposed at both ends of the drain section. There is a pipe diameter between the two connecting sections that allows for straight-line connection, ensuring that the water flow has low resistance during use and can converge to the lowest point during draining. The two ends of the connecting section are respectively connected to the main water supply pipe through a first solenoid valve and a second solenoid valve. The drain section includes a first drain pipe that slopes downward from both ends toward the middle. The bottom surface of the first drain pipe is lower than the bottom surface of the connecting section. A second drain pipe is disposed at the lowest point of the drain section. The second drain pipe slopes downward and connects to the return water tank, and a third solenoid valve is disposed at its end. This application prevents leakage into the furnace and affects the furnace condition by setting up a leak-proof and freeze-proof pipe, while also preventing the water from freezing and causing the pipes and valves to crack.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace cooling technology, specifically a structure for preventing water leakage and freezing when water is pumped onto the furnace top. Background Technology

[0002] Currently, blast furnace smelting employs top water injection to control the furnace top temperature and provide cooling protection for the furnace top equipment. The control principle of top water injection is as follows: when the top temperature exceeds the set start temperature for water injection, the top water injection gun is activated; when the top temperature falls below the set stop temperature, top water injection stops, in order to control the furnace top temperature within the target range. However, when using top water injection, the electric valves frequently start and close. Prolonged use can lead to leaks due to electromagnetic signal issues or valve core wear, causing the valves to not close tightly, which is detrimental to furnace conditions, degrades the ore, and results in high water consumption and waste. In winter, the top water injection system is often shut down for extended periods, leading to freezing and potential valve cracking. Chinese patent CN218372365U discloses a blast furnace top water injection antifreeze and leak detection device. It utilizes a second ring pipe and a bypass valve to prevent the main water supply pipeline from freezing. In winter, when water injection to the blast furnace top is not required, the manual control valve on the water injection gun is closed. Every 30 minutes, the air pump valves and bypass valve 12 are opened, allowing water to flow through the second ring pipe to the industrial water tank, thus changing the water flow in the pipeline from stagnant to flowing water to prevent freezing. However, in practical applications, the water flowing through the ring pipe to the industrial water tank increases the risk of leakage into the furnace and significantly increases water consumption and waste. Therefore, this application proposes a blast furnace top water injection anti-leakage and anti-freeze structure to address these problems. Utility Model Content

[0003] The purpose of this invention is to provide a furnace top water-spraying structure that prevents leakage and freezing, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A leak-proof and freeze-proof structure for furnace top water supply includes a leak-proof and freeze-proof pipe. The leak-proof and freeze-proof pipe includes a connecting section and a drain section. Two connecting sections are directly connected and respectively disposed at both ends of the drain section. The two ends of the connecting section are respectively connected to the main water supply pipe through a first solenoid valve and a second solenoid valve. The drain section includes a first drain pipe that is inclined downward from both ends toward the middle. The bottom surface of the first drain pipe is lower than the bottom surface of the connecting section. A second drain pipe is disposed at the lowest point of the drain section. The second drain pipe is inclined downward and connected to the return water tank. A third solenoid valve is disposed at its end.

[0006] In the above-mentioned furnace top water-filling anti-leakage and anti-freezing structure, the first drain pipe has a downward inclination of no more than 5° and the connecting sections at both ends have a pipe diameter that can be straight-through.

[0007] In the above-mentioned furnace top water-spraying anti-leakage and anti-freezing structure, the diameter of the pipe connecting the two connecting sections in a straight line is not less than 1 / 2 of the pipe diameter.

[0008] In the above-mentioned furnace top water-filling anti-leakage and anti-freezing structure, the second drain pipe has a downward inclination of more than 5°, and its end is suspended above the return water tank.

[0009] The above-mentioned furnace top water-filling anti-leakage and anti-freezing structure includes a second drain pipe comprising multiple branch pipes. These multiple branch pipes are symmetrically arranged and connected between the first drain pipe and the second drain pipe, and their connection points are all located at the front end of the third solenoid valve.

[0010] In the above-mentioned furnace top water-filling anti-leakage and anti-freezing structure, the second drain pipe is connected to the first drain pipe at an angle, and the ports at the connection are all flared.

[0011] In the above-mentioned furnace top water pumping anti-leakage and anti-freezing structure, the second solenoid valve is a shut-off valve set at the front end of the annular water distribution pipe to adjust the water pumping flow.

[0012] In the above-mentioned furnace top water-cooling anti-leakage and anti-freezing structure, both the first solenoid valve and the third solenoid valve are on / off ball valves.

[0013] The beneficial effects of adopting the above technical solution are:

[0014] The furnace top water supply anti-leakage and anti-freezing structure provided by this utility model includes an anti-leakage and anti-freezing pipe, which is provided with a connecting section and a drain section. The connecting section is directly connected to both ends of the drain section, and there is a pipe diameter between the two connecting sections that can be directly connected to ensure that the water flow has low resistance during use. When draining, the water can be collected at the lowest point and completely drained. The drain section includes a first drain pipe that is inclined downward from both ends to the middle. The bottom surface of the first drain pipe is lower than the bottom surface of the connecting section. A second drain pipe is provided at the lowest point of the drain section. The second drain pipe is inclined downward and connected to the return water tank. A third solenoid valve is provided at its end. This structure ensures that no water will remain in the anti-leakage and anti-freezing pipe and can be completely drained. This application avoids leakage into the furnace and affecting the furnace condition by setting up an anti-leakage and anti-freezing pipe, and at the same time avoids the freezing of stagnant water, which could cause the pipes and valves to freeze and crack. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure of the leak-proof and antifreeze pipe of this utility model;

[0017] Figure 3 This is a utility model Figure 2 A schematic diagram of the side view structure;

[0018] Figure 4 This is a utility model Figure 2 A schematic diagram of the three-dimensional structure.

[0019] In the diagram: 1. Leak-proof and antifreeze pipe; 1-1. Connecting section; 1-2-1. First drain pipe; 1-2-2. Second drain pipe; 1-2. Drain section; 2. First solenoid valve; 3. Second solenoid valve; 4. Main water supply pipe; 5. Return water tank; 6. Third solenoid valve; 7. Circular water distribution pipe. Detailed Implementation

[0020] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be clearly and completely described below in conjunction with specific embodiments.

[0021] like Figures 1 to 4 The diagram illustrates a leak-proof and freeze-proof structure for furnace top water pumping, comprising a leak-proof and freeze-proof pipe 1. The leak-proof and freeze-proof pipe 1 includes a connecting section 1-1 and a drain section 1-2, which are fixedly connected as a single unit. Two connecting sections 1-1 are directly connected at opposite ends of the drain section 1-2, reducing pipe resistance during furnace top water pumping operations. The two ends of the connecting section 1-1 are connected to the main water pumping pipe 4 via a first solenoid valve 2 and a second solenoid valve 3, respectively. The drain section 1-2 is inclined from both ends towards the middle. A first drain pipe 1-2-1 is installed downwards, with its bottom surface lower than that of the connecting section 1-1. A second drain pipe 1-2-2 is installed at the lowest point of the drain section 1-2, and the second drain pipe 1-2-2 is inclined downwards and connects to the return water tank 5. A third solenoid valve 6 is installed at its end. The first solenoid valve 2, the second solenoid valve 3, and the third solenoid valve 6 are all electrically connected to the control system. The first solenoid valve 2 and the third solenoid valve 6 are both on / off ball valves used to open and close the main water supply pipe 4. The second solenoid valve 3 is a shut-off valve installed at the front end of the annular water distribution pipe 7 to regulate the water flow rate. In a low-cost modification solution, the second solenoid valve 3 and the third solenoid valve 6 can also be replaced with manual valves, not connected to the control system, and manually operated to drain the stored water.

[0022] The first drain pipe 1-2-1 has a downward inclination of no more than 5°, and the connecting sections 1-1 at both ends have a diameter that allows for straight-line connection. The diameter of the two connecting sections 1-1 that allow for straight-line connection is no less than 1 / 2 of the pipe diameter. The inclination of the pipe is related to the pipe diameter; when the pipe diameter is larger, the inclination can be increased accordingly. The pipe diameter is sufficient to ensure straight-line connection, thus minimizing resistance during furnace top water injection and allowing water to quickly drain to the lowest point without residue during venting. The second drain pipe 1-2-2 has a downward inclination greater than 5°, allowing for smoother water flow and faster drainage under gravity. Its end is suspended above the return water tank 5.

[0023] Furthermore, the second drain pipe 1-2-2 includes multiple branch pipes (not shown in the figure). These branch pipes are symmetrically arranged and connect the first drain pipe 1-2-1 and the second drain pipe 1-2-2. The connection points are all located at the front end of the third solenoid valve 6. When the first drain pipe 1-2-1 is relatively long, the second drain pipe 1-2-2 is provided with branch pipes connecting to multiple parts of the first drain pipe 1-2-1, which can accelerate the drainage speed. The second drain pipe 1-2-2 is connected to the first drain pipe 1-2-1 at an angle, and the connection ports are all flared, with rounded corners on the acute angle connection side for a more secure connection and lower resistance to water flow.

[0024] Working process: In the working state, the first and second solenoid valves are opened simultaneously, and the third solenoid valve is closed. Cooling water is pumped to the top of the furnace through the main water supply pipe and the annular water distribution pipe. In the venting state, the first and second solenoid valves are closed, and the water in the annular water distribution pipe is naturally vented. The third solenoid valve is opened, and the water in the anti-leakage and anti-freeze pipe is vented to the return water tank.

[0025] This article uses specific embodiments to illustrate the principles and implementation methods of this utility model in detail. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. Those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A structure for preventing water leakage and freezing at the top of a furnace, characterized in that: The system includes a leak-proof and freeze-proof pipe (1), which includes a connecting section (1-1) and a drain section (1-2). The two connecting sections (1-1) are directly connected and respectively located at the two ends of the drain section (1-2). The two ends of the connecting section (1-1) are respectively connected to the main water supply pipe (4) through a first solenoid valve (2) and a second solenoid valve (3). The drain section (1-2) includes a first drain pipe (1-2-1) that is inclined downward from both ends to the middle. The bottom surface of the first drain pipe (1-2-1) is lower than the bottom surface of the connecting section (1-1). A second drain pipe (1-2-2) is located at the lowest point of the drain section (1-2). The second drain pipe (1-2-2) is inclined downward and connected to the return water tank (5). A third solenoid valve (6) is located at its end.

2. A water leakage prevention and freezing prevention structure for a water top of a furnace according to claim 1, characterized in that: The first vent pipe (1-2-1) has a downward inclination of no more than 5° and the connecting sections (1-1) at both ends of it have a diameter that allows for straight-line connection.

3. A water leakage prevention and freezing prevention structure for a water top of a furnace according to claim 2, characterized in that: The diameter of the pipe through which the two connecting sections (1-1) are connected in a straight line is not less than 1 / 2 of the pipe diameter.

4. The water leakage and freezing prevention structure for a furnace roof according to claim 1, characterized in that: The second drain pipe (1-2-2) is inclined downward at an angle greater than 5°, and its end is suspended above the return water tank (5).

5. A water leakage prevention and freezing prevention structure for a water top of a furnace according to claim 4, characterized in that: The second vent pipe (1-2-2) includes multiple branch pipes, which are symmetrically arranged and connected between the first vent pipe (1-2-1) and the second vent pipe (1-2-2), and their connection points are all located at the front end of the third solenoid valve (6).

6. A water leakage prevention and freezing prevention structure for a water top of a furnace according to claim 5, characterized in that: The second exhaust pipe (1-2-2) is connected to the first exhaust pipe (1-2-1) at an angle, and the ports at the connection are flared.

7. The furnace top water-lubricating anti-leakage and anti-freezing structure according to claim 5, characterized in that: The second solenoid valve (3) is a shut-off valve set at the front end of the annular water distribution pipe (7) to adjust the water flow rate.

8. A water leakage prevention and freeze prevention structure for a water top of a furnace according to claim 7, characterized in that: Both the first solenoid valve (2) and the third solenoid valve (6) are on / off ball valves.

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