Water leakage inspection structure for drain outlet of hot blast valve of hot blast stove

Abstract

The utility model discloses a hot blast stove hot blast valve drain outlet water leakage inspection structure, a first branch pipe with two open ends is installed below a drain outlet, a first valve is installed on the first branch pipe, the first branch pipe is provided with a front end and a rear end, the front end is communicated with the drain outlet, the rear end is bent to form an L-shaped bending part, and the first valve is installed on the first branch pipe. The bending part is connected with a second branch pipe with openings in the two ends, the second branch pipe is obliquely arranged downwards relative to the horizontal plane, a second valve is installed on the side, close to the bending part, of the second branch pipe, and a third valve is installed on the side, away from the bending part, of the second branch pipe; a water collecting space is formed between the second valve and the third valve, and a third branch pipe with the two ends open is installed at the end, away from the bent part, of the second branch pipe. The device is simple in structure, easy to operate and high in troubleshooting efficiency.

Description

Technical Field

[0001] The utility model relates to the field of steel smelting, in particular to a water leakage inspection structure for a sewage outlet of a hot blast valve of a hot blast furnace. Background Art

[0002] The hot air valve of the hot blast furnace of the iron-making blast furnace is an important valve. Its main function is to deliver high-temperature and high-pressure hot air above 1200℃ to the blast furnace. The valve seat and valve plate of the hot air valve are equipped with cooling water pipes and cast with refractory materials. The bottom of the hot air valve is designed with a sewage outlet and a sewage gate valve. The following shortcomings were found in this structure during use:

[0003] 1. Although flow meters are installed at the inlet and outlet of the closed-loop cooling water of the hot air valve, the deviation of the inlet and outlet flow meter values ​​is compared to preliminarily determine whether the hot air valve is leaking. However, considering that the flow meter itself may have an instrument failure and there is a high-temperature and high-pressure gas medium in the hot air valve channel, it is impossible to open the drain gate valve at the bottom of the hot air valve to check whether the hot air valve cooling water pipe is actually leaking during on-site production, which makes troubleshooting difficult.

[0004] 2. When the sewage valve is opened to check for leaks during shutdown, it is time-consuming and laborious to open and close the sewage valve during maintenance because the sewage gate valve has a large diameter and the on-site operating space is limited.

[0005] In view of the above-mentioned defects, it is urgent to improve the existing method of checking water leakage at the exhaust port of the hot air valve of the furnace to improve the efficiency of troubleshooting. Utility Model Content

[0006] The utility model aims to provide a water leakage inspection structure for a sewage outlet of a hot air valve of a hot air stove.

[0007] The technical solution to achieve the purpose of the utility model is: a water leakage inspection structure for a hot blast valve drain outlet of a hot blast furnace, a first branch pipe with openings at both ends is installed below the drain outlet, a first valve is installed on the first branch pipe, the first branch pipe has a front end and a rear end, the front end is connected to the drain outlet, the rear end is bent to form an "L"-shaped bending portion, the bending portion is connected to a second branch pipe with openings at both ends, the second branch pipe is inclined downward relative to a horizontal plane, a second valve is installed on a side of the second branch pipe close to the bending portion, a third valve is installed on a side of the second branch pipe away from the bending portion, a water collection space is formed between the second valve and the third valve, and a third branch pipe with openings at both ends is installed on the end of the second branch pipe away from the bending portion.

[0008] Furthermore, the first valve is connected to the first branch pipe flange.

[0009] Furthermore, the second valve is flange-connected to the second branch pipe.

[0010] Furthermore, the third valve is flange-connected to the second branch pipe and the third branch pipe respectively.

[0011] The utility model realizes a water leakage inspection structure for the hot air furnace hot air valve drain outlet, wherein a water collection space inclined downward relative to a horizontal plane is formed between the second valve and the third valve. If the hot air valve drain outlet leaks, the accumulated water in the drain box will flow into the water collection space after the first valve and the second valve are opened for a period of time, and the accumulated water will flow out from the third branch pipe after the third valve is opened. The utility model has a simple structure, is easy to operate, and has a high troubleshooting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the water leakage inspection structure of the hot air valve discharge outlet of the hot air furnace described in an embodiment of the utility model. DETAILED DESCRIPTION

[0013] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0014] like Figure 1 As shown, a water leakage inspection structure for a hot blast valve drain port of a hot blast furnace is provided, a first branch pipe 1 with openings at both ends is installed below the drain port 10, a first valve 2 is installed on the first branch pipe 1, the first branch pipe 1 has a front end 11 and a rear end, the front end 11 is connected to the drain port 10, the rear end is bent to form an "L"-shaped bending portion 12, the bending portion 12 is connected to a second branch pipe 3 with openings at both ends, the second branch pipe 3 is tilted downward relative to a horizontal plane, a second valve 4 is installed on a side of the second branch pipe 3 close to the bending portion 12, a third valve 5 is installed on a side of the second branch pipe 3 away from the bending portion 12, a water collecting space 31 is formed between the second valve 4 and the third valve 5, a third branch pipe 6 with openings at both ends is installed at the end of the second branch pipe 3 away from the bending portion 12, and the third valve 4 is flange-connected to the second branch pipe 3 and the third branch pipe 6, respectively.

[0015] The working principle of the water leakage inspection structure of the hot air valve discharge port of the hot air furnace described in this embodiment is as follows: the first valve, the second valve and the third valve are all in a closed state at ordinary times; when it is necessary to check for leaks on site online, the first valve and the second valve are opened manually. If there is a water leak in the hot air valve, the accumulated water in the discharge tank enters the second branch pipe between the second valve and the third valve. After waiting for a short period of time, the second valve is closed and the third valve is opened. If water is found to be sprayed out of the third branch pipe, and the above alternating opening and closing of the second valve and the third valve is repeated for many times, if water is sprayed out of the third branch pipe, it can be determined that the hot air valve is leaking and needs to be replaced in time; if the above operation does not find water spraying, only gas spraying, it can be determined that the hot air valve is not leaking. After the judgment is completed, the above valves can be closed at last. It has a simple structure and convenient operation, which improves the efficiency of water leakage inspection of the hot air valve discharge port of the hot air furnace.

[0016] The first valve, the second valve and the third valve of the utility model are all commercially available ball valve products that are resistant to high temperatures, and their structures are prior art and will not be described in detail herein.

[0017] The connection relationship between each valve and the pipeline is not limited to that shown in the embodiment, and conventional connection methods in the mechanical field such as threaded connection can also be used. To improve the convenience of disassembly and assembly, flange connection is used between each valve and the pipeline in this embodiment.

[0018] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A water leakage inspection structure for a hot air valve outlet of a hot air stove, characterized in that: A first branch pipe with openings at both ends is installed below the sewage outlet, a first valve is installed on the first branch pipe, the first branch pipe has a front end and a rear end, the front end is connected to the sewage outlet, the rear end is bent to form an "L"-shaped bending portion, the bending portion is connected to a second branch pipe with openings at both ends, the second branch pipe is inclined downward relative to a horizontal plane, a second valve is installed on a side of the second branch pipe close to the bending portion, a third valve is installed on a side of the second branch pipe away from the bending portion, a water collection space is formed between the second valve and the third valve, and a third branch pipe with openings at both ends is installed on the end of the second branch pipe away from the bending portion.

2. The water leakage inspection structure for the hot air valve drain outlet of the hot air stove according to claim 1 is characterized in that: The first valve is connected to the first branch pipe flange.

3. The water leakage inspection structure for the hot air valve drain outlet of the hot air stove according to claim 2 is characterized in that: The second valve is flange-connected to the second branch pipe.

4. The water leakage inspection structure for the hot air valve drain outlet of a hot air stove according to claim 2 is characterized in that: The third valve is flange-connected to the second branch pipe and the third branch pipe respectively.

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