Corrosion and heat resistant integrated hot blast valve

Abstract

The utility model discloses a kind of corrosion-resistant heat-resistant integrated hot blast valves, including valve body, the upper side of valve body inner arc surface is rotatably connected with valve core, further including cooling mechanism;Cooling mechanism: it includes cavity, cooling cavity one, cooling cavity two and radiating fin, the upper side in the inside of valve body is respectively arranged in the cavity, cooling cavity one and cooling cavity two are respectively arranged in the front and rear sides in the inside of valve body, the middle part of cooling cavity one rear wall and the middle part of cooling cavity two front wall are respectively provided with radiating fin, the cavity of front side is communicated with cooling cavity one, the cavity of back side is communicated with cooling cavity two, the cooling mechanism further includes deflector, the middle part of cooling cavity one front wall and the middle part of cooling cavity two rear wall are respectively provided with deflector, deflector is spaced apart with the radiating fin of same height, this corrosion-resistant heat-resistant integrated hot blast valve, the flow path of cooling water is optimized, cooling dead angle is reduced, heat exchange efficiency is improved while also guarantee the heat resistance of valve body.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace hot blast stove systems, specifically a corrosion-resistant and heat-resistant integrated hot blast valve. Background Technology

[0002] This hot blast valve is suitable for hot blast ducts in blast furnace hot blast stove systems, as well as hot blast ducts in other industrial kilns and heating furnaces. It can cut off high-temperature air, gas, and flue gas. This valve solves the problem of reliable shut-off and regulation under extreme and harsh conditions (high temperature, corrosion, high pressure differential, high dust). The existing technology is authorized by publication number CN 208717362. U's patent discloses a common hot air valve body, including a long flange, a left flange, a right flange, a left side plate, a right side plate, a left tube plate, a right tube plate, an inner circumference plate, an outer circumference plate, an inlet pipe, an outlet pipe, and a drain pipe. The left end face of the right tube plate of the hot air valve body is welded to the right end face of the contact ring near the inner diameter, and the outer diameter of the contact ring is welded to the left end face of the right side plate near the aperture. Although the device has a cooling water cavity inside the valve body, during the subsequent cooling process, the cooling water flows freely in the large cooling water cavity. The water flows quickly along the path of least resistance (such as the short path from the inlet to the outlet), resulting in uneven overall flow velocity distribution. Most of the cooling water cavity is not effectively utilized, leading to a decrease in the overall heat dissipation capacity of the valve body, resulting in uneven temperature distribution of the valve body, and finally causing problems such as thermal deformation and stress cracking. To address this, we propose a corrosion-resistant and heat-resistant integrated hot air valve. Utility Model Content

[0003] The technical problem this invention aims to solve is to overcome existing defects and provide a corrosion-resistant and heat-resistant integrated hot air valve. Through the combined arrangement of heat dissipation fins and guide plates, the large internal spaces of cooling chamber one and cooling chamber two can be transformed into a set of continuous and narrow flow channels. This optimizes the flow path of cooling water, reduces cooling dead zones, increases water flow velocity, and transforms stable water flow into chaotic turbulence. This improves heat exchange efficiency while ensuring the heat resistance of the valve body, effectively solving the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant and heat-resistant integrated hot air valve, including a valve body, a valve core rotatably connected to the upper side of the inner arc surface of the valve body, and a cooling mechanism; Cooling mechanism: It includes cavities, cooling cavity one, cooling cavity two, and heat dissipation fins. The cavities are respectively located on the upper side of the valve body. Cooling cavity one and cooling cavity two are respectively located on the front and rear sides of the valve body. Heat dissipation fins are respectively provided in the middle of the rear wall of cooling cavity one and the middle of the front wall of cooling cavity two. The front cavity is connected to cooling cavity one, and the rear cavity is connected to cooling cavity two. Through the cooperation of heat dissipation fins and guide plates, the large space inside cooling cavity one and cooling cavity two can be transformed into a set of continuous and narrow flow channels, optimizing the flow path of cooling water, reducing cooling dead angles, increasing water flow velocity, and transforming the steady water flow into turbulent flow, improving heat exchange efficiency while ensuring the heat resistance of the valve body.

[0005] Furthermore, the cooling mechanism also includes guide plates, which are respectively disposed in the middle of the front wall of the first cooling chamber and the middle of the rear wall of the second cooling chamber. The guide plates are spaced apart from the heat dissipation fins of the same height, which can optimize the flow path of the cooling water.

[0006] Furthermore, the cooling mechanism also includes an inlet pipe, an inlet pipe, and a drain pipe. The drain pipe is respectively installed in the drain outlets opened in the middle of the front and rear ends of the valve body. The inlet pipe is installed in the inlet on the lower side of the front and rear ends of the valve body. The two sets of inlet pipes and drain pipes are connected to the cooling chamber and the cooling chamber, respectively. The inlet pipe is installed in the inlet on the upper side of the front and rear ends of the valve body. The two sets of inlet pipes are connected to the cavity. The four sets of guide plates on the upper side are respectively located between the lower side of the outer arc surface of the vertically adjacent inlet pipe and the upper side of the outer arc surface of the drain pipe. The four sets of guide plates on the lower side are respectively located between the upper side of the outer arc surface of the vertically adjacent inlet pipe and the lower side of the outer arc surface of the drain pipe, which can control the flow of cooling water in and out.

[0007] Furthermore, a corrosion-resistant layer is provided in the middle of the arc surface inside the valve body, which can improve the corrosion resistance of the valve body.

[0008] Furthermore, a protective layer is provided in the middle of both ends of the valve core, which can improve the corrosion resistance of the valve core.

[0009] Furthermore, a wear-resistant layer is provided in the middle of the outer arc surface of the valve core, and the outer surfaces of both sets of protective layers are in contact with the inner arc surface of the wear-resistant layer, which can improve the wear resistance of the valve core.

[0010] Furthermore, ceramic fiber gaskets are respectively provided in the middle part of the left and right ends of the valve body, which can improve the sealing between the valve body and the external pipeline.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This corrosion-resistant and heat-resistant integrated hot air valve has the following advantages: By combining heat dissipation fins and guide plates, the large internal spaces of cooling chamber one and cooling chamber two can be transformed into a set of continuous and narrow flow channels, optimizing the flow path of cooling water, reducing cooling dead zones, increasing water flow velocity, and transforming steady water flow into chaotic turbulence, thereby improving heat exchange efficiency while ensuring the heat resistance of the valve body. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic cross-sectional view of the right side of this utility model; Figure 3 This is a schematic diagram of the lower sectional structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the cavity in this utility model; Figure 5 This is a schematic diagram of the cross-sectional planar structure on the right side of this utility model; Figure 6 This is a schematic diagram of the internal structure of the valve core of this utility model; Figure 7 This is an enlarged structural diagram of point A in this utility model.

[0013] In the diagram: 1 Valve body, 2 Valve core, 3 Cooling mechanism, 31 Cavity, 32 Cooling cavity one, 33 Cooling cavity two, 34 Heat dissipation fins, 35 Guide plate, 36 Water inlet pipe one, 37 Water inlet pipe two, 38 Drain pipe, 4 Corrosion resistant layer, 5 Protective layer, 6 Wear resistant layer, 7 Ceramic fiber gasket. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-7 This embodiment provides a technical solution: a corrosion-resistant and heat-resistant integrated hot air valve, including a valve body 1, a valve core 2 rotatably connected to the upper side of the inner arc surface of the valve body 1, and a cooling mechanism 3. Cooling mechanism 3: It includes a cavity 31, a first cooling cavity 32, a second cooling cavity 33, and heat dissipation fins 34. The cavity 31 is located on the upper side inside the valve body 1. The first cooling cavity 32 and the second cooling cavity 33 are located on the front and rear sides inside the valve body 1, respectively. Heat dissipation fins 34 are respectively provided on the middle part of the rear wall of the first cooling cavity 32 and the middle part of the front wall of the second cooling cavity 33. The front cavity 31 is connected to the first cooling cavity 32, and the rear cavity 31 is connected to the second cooling cavity 33. The heat dissipation fins 34 are made of copper. Made of copper, which has excellent thermal conductivity, the heat dissipation fins 34 are completely immersed in the cooling water, and their working temperature is less than 100℃. Through the combination of heat dissipation fins 34 and guide plates 35, the large space inside cooling chamber 1 32 and cooling chamber 2 33 can be transformed into a set of continuous and narrow flow channels, optimizing the flow path of cooling water. While increasing the water flow velocity, it can also transform the steady water flow into a chaotic turbulent flow, improving the heat exchange efficiency while ensuring the heat resistance of valve body 1.

[0016] The cooling mechanism 3 also includes a guide plate 35, which is respectively disposed in the middle of the front wall of the first cooling chamber 32 and the middle of the rear wall of the second cooling chamber 33. The guide plate 35 is spaced apart from the heat dissipation fins 34 of the same height. The heat dissipation fins 34 and the guide plate 35 are transformed into a set of continuous and narrow flow channels in the large space inside the first cooling chamber 32 and the second cooling chamber 33. When the cooling water enters the interior of the first cooling chamber 32 and the second cooling chamber 33, the flow channels will force the cooling water to flow closely against the high temperature inner wall of the valve body 1, thus ensuring that the cooling water sweeps over all surfaces that need to be cooled.

[0017] The cooling mechanism 3 includes an inlet pipe 36, an inlet pipe 37, and a drain pipe 38. The drain pipe 38 is located in the drain outlets at the middle of the front and rear ends of the valve body 1. An inlet pipe 36 is installed in each of the inlets 36 located on the lower side of the front and rear ends of the valve body 1. The two sets of inlet pipes 36 and drain pipes 38 are connected to the cooling chamber 32 and cooling chamber 33, respectively. An inlet pipe 37 is installed in each of the inlets 37 located on the upper side of the front and rear ends of the valve body 1. Both sets of inlet pipes 37 are connected to the cavity 31. Four sets of guide plates 35 are located between the lower side of the outer arc surface of the vertically adjacent inlet pipe 37 and the upper side of the outer arc surface of the drain pipe 38. The four sets of guide plates 35 on the lower side are respectively located between the upper side of the outer arc surface of the vertically adjacent water inlet pipe 36 and the lower side of the outer arc surface of the drain pipe 38. The water inlet valves connected in series outside the water inlet pipe 36 and water inlet pipe 37 and the drain valve connected in series outside the drain pipe 38 are opened. Then, the cooling water enters the interior of the water inlet pipe 36 and water inlet pipe 37 through the external pipes. The cooling water in the water inlet pipe 36 will flow into the interior of the cooling chamber 32 and cooling chamber 33, while the cooling water in the water inlet pipe 37 will flow into the corresponding cooling chamber 32 and cooling chamber 33 through the cavity 31. The cooling water after use is finally discharged through the drain pipe 38.

[0018] Among them: a corrosion-resistant layer 4 is provided in the middle of the inner arc surface of valve body 1. The corrosion-resistant layer 4 is a corundum tube. The corundum tube is a high-temperature resistant ceramic product with high-purity alumina as the main component. It has good hardness and corrosion resistance and can withstand high temperature of 1600℃. The corrosion-resistant layer 4 is installed in the middle of the inner arc surface of valve body 1 by means of mechanical groove and bolt.

[0019] Among them, a protective layer 5 is provided in the middle of both the left and right ends of the valve core 2. The protective layer 5 is a chromium oxide coating. The chromium oxide coating has excellent corrosion resistance and its melting point is as high as 2435℃. Within the working temperature range of the hot air valve, it will not undergo phase change or softening and can always maintain its hardness and chemical stability. The protective layer 5 is sprayed on both the left and right ends of the valve core 2 by supersonic flame spraying.

[0020] Among them, a wear-resistant layer 6 is provided in the middle of the outer arc surface of the valve core 2, and the outer surfaces of the two sets of protective layers 5 are in contact with the inner arc surface of the wear-resistant layer 6. The wear-resistant layer 6 is a cobalt-based alloy. The cobalt-based alloy has good hardness and can work for a long time in the temperature range of 980℃-1100℃. The wear-resistant layer 6 is fixed to the outside of the valve core 2 by welding.

[0021] Among them, ceramic fiber gaskets 7 are respectively installed in the middle of the left and right ends of the valve body 1. Bolts are passed through the flanges installed on the outside of the valve body 1 to connect with the hot air branch pipes of the external blast furnace hot blast stove system, thereby realizing the installation and fixation of the corrosion-resistant and heat-resistant integrated hot air valve. The ceramic fiber gasket 7 is a high-temperature industrial sealing element made of aluminum silicate fiber as the main material. It has excellent high temperature resistance and good heat insulation performance. The ceramic fiber gasket can be used in the temperature range of -200℃ to 1600℃.

[0022] The working principle of the corrosion-resistant and heat-resistant integrated hot air valve provided by this utility model is as follows: Before use, first connect the inlet pipe 36, the second inlet pipe 37, and the drain pipe 38 to the external pipeline. During the connection process, the inlet pipe 36, the second inlet pipe 37, and the drain pipe 38 are connected by screws between their external flange 1 and the external pipeline flange 2. Then, the valve body 1 contacts the hot air branch pipe of the external blast furnace hot blast stove system through the ceramic fiber gasket 7. Finally, bolts are passed through the flange on the outside of the valve body 1 and connected to the hot air branch pipe of the external blast furnace hot blast stove system. This achieves the installation and fixation of the corrosion-resistant and heat-resistant integrated hot air valve. The ceramic fiber gasket 7 is a high-temperature industrial seal made primarily of aluminosilicate fiber. The components possess excellent high-temperature resistance and good thermal insulation properties. The ceramic fiber gasket can be used in a temperature range of -200℃ to 1600℃ and maintains good sealing performance at high temperatures. During subsequent use of the corrosion-resistant and heat-resistant integrated hot air valve, first open the inlet valves connected in series externally to inlet pipe 36 and inlet pipe 37, and the drain valve connected in series externally to drain pipe 38. Then, cooling water enters the interior of inlet pipe 36 and inlet pipe 37 through external pipes. The cooling water in inlet pipe 36 flows into cooling chamber 32 and cooling chamber 33, while the cooling water in inlet pipe 37 flows sequentially into the corresponding cooling chamber 32 and cooling chamber 33 through cavity 31. The heat dissipation fins 34 and the guide plate 35 will... The large internal spaces of cooling chambers 32 and 33 are transformed into a series of continuous and narrow flow channels. When cooling water enters cooling chambers 32 and 33, the flow channels force the cooling water to flow tightly against the high-temperature inner wall of valve body 1. This ensures that the cooling water sweeps over all surfaces that need cooling. Moreover, the narrow flow channels naturally increase the water flow velocity. When the flow velocity increases and encounters disturbances from the fins and bends, the water flow changes from a steady laminar flow to a chaotic turbulent flow, further improving the heat exchange efficiency. The used cooling water is finally discharged through drain pipe 38. The heat dissipation fins 34 are made of copper, which has excellent thermal conductivity. The heat dissipation fins 34 are completely immersed in the cooling water, and their operating temperature is less than 100℃. Subsequent operators can drive the equipment using external motors, etc. The valve core 2 is rotated by an external drive device that controls its rotation angle via potentiometers or other sensing elements, thereby opening the valve body 1. At this time, hot air generated by the external blast furnace hot blast stove system passes through the gap between the valve core 2 and the valve body 1. The corrosion-resistant layer 4 is a corundum tube, a high-temperature resistant ceramic product with high-purity alumina as its main component. It possesses excellent hardness and corrosion resistance, capable of withstanding temperatures up to 1600℃. The corrosion-resistant layer 4 is installed in the center of the inner arc surface of the valve body 1 using a mechanical slot and bolt assembly. The protective layer 5 is a chromium oxide coating, which has excellent corrosion resistance and a melting point as high as 2435℃. Within the operating temperature range of the hot blast valve, it will not undergo phase change or softening.To maintain its hardness and chemical stability, the protective layer 5 is applied to both ends of the valve core 2 using supersonic flame spraying. The wear-resistant layer 6 is a cobalt-based alloy, which possesses excellent hardness and can operate continuously within a temperature range of 980℃-1100℃. The wear-resistant layer 6 is fixed to the outside of the valve core 2 by welding. Although the temperature of the hot blast generated by the external blast furnace hot blast stove system is typically between 1000℃ and 1350℃ (this is the temperature when the hot blast enters the valve body 1), after subsequent cooling, the valve body 1's own temperature is usually below 300℃. This temperature is far below the maximum temperature that the corrosion-resistant layer 4, protective layer 5, and wear-resistant layer 6 can withstand. At this temperature, the corrosion resistance and wear resistance of the corrosion-resistant layer 4, protective layer 5, and wear-resistant layer 6 will not decrease.

[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A corrosion-resistant and heat-resistant integrated hot air valve, comprising a valve body (1), wherein a valve core (2) is rotatably connected to the upper side of the inner arc surface of the valve body (1), characterized in that: It also includes a cooling mechanism (3); Cooling mechanism (3): It includes a cavity (31), a first cooling cavity (32), a second cooling cavity (33), and heat dissipation fins (34). The cavity (31) is respectively located on the upper side inside the valve body (1). The first cooling cavity (32) and the second cooling cavity (33) are respectively located on the front and rear sides inside the valve body (1). Heat dissipation fins (34) are respectively provided on the middle part of the rear wall of the first cooling cavity (32) and the middle part of the front wall of the second cooling cavity (33). The front cavity (31) is connected to the first cooling cavity (32), and the rear cavity (31) is connected to the second cooling cavity (33).

2. The corrosion-resistant and heat-resistant integrated hot air valve according to claim 1, characterized in that: The cooling mechanism (3) also includes a guide plate (35), which is respectively disposed in the middle of the front wall of the first cooling chamber (32) and the middle of the rear wall of the second cooling chamber (33). The guide plate (35) is disposed at intervals with heat dissipation fins (34) of the same height.

3. The corrosion-resistant and heat-resistant integrated hot air valve according to claim 2, characterized in that: The cooling mechanism (3) further includes a water inlet pipe (36), a water inlet pipe (37), and a drain pipe (38). The drain pipe (38) is respectively installed in the drain outlets opened in the middle of the front and rear ends of the valve body (1). The water inlet pipes (36) are installed in the water inlets opened on the lower side of the front and rear ends of the valve body (1). The two sets of water inlet pipes (36) and drain pipes (38) are respectively connected to the cooling chamber (32) and the cooling chamber (33). The valve body (1) The two inlet pipes (37) are opened on the upper side of the front and rear ends. Both sets of inlet pipes (37) are connected to the cavity (31). The four sets of guide plates (35) on the upper side are located between the lower side of the outer arc surface of the vertically adjacent inlet pipe (37) and the upper side of the outer arc surface of the drain pipe (38). The four sets of guide plates (35) on the lower side are located between the upper side of the outer arc surface of the vertically adjacent inlet pipe (36) and the lower side of the outer arc surface of the drain pipe (38).

4. The corrosion-resistant and heat-resistant integrated hot air valve according to claim 1, characterized in that: A corrosion-resistant layer (4) is provided in the middle of the inner arc surface of the valve body (1).

5. The corrosion-resistant and heat-resistant integrated hot air valve according to claim 1, characterized in that: The valve core (2) has a protective layer (5) in the middle of both the left and right ends.

6. The corrosion-resistant and heat-resistant integrated hot air valve according to claim 5, characterized in that: The valve core (2) has a wear-resistant layer (6) in the middle of its outer arc surface, and the outer surfaces of the two sets of protective layers (5) are in contact with the inner arc surface of the wear-resistant layer (6).

7. The corrosion-resistant and heat-resistant integrated hot air valve according to claim 1, characterized in that: Ceramic fiber gaskets (7) are respectively provided in the middle of the left and right ends of the valve body (1).

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