Airflow cooling device for air intake pipe

Abstract

This utility model relates to the field of metallurgical technology. It provides an air inlet duct airflow cooling device comprising a housing, with airflow connecting pipes at opposite ends of the housing, a circulating heat exchange assembly mounted on the housing, and a positioning support assembly located at the bottom of the housing. The circulating heat exchange assembly provided by this utility model uses a plug-in pipe with an internal connector that communicates with the interior of the housing. A heat exchange tube is connected to the connector, and heat exchange fins are provided on both the upper and lower ends of the heat exchange tube, communicating with the heat exchange tube. A connecting flange is provided at the end of the plug-in pipe. This invention solves the technical problem in existing technologies where cooling methods are mainly natural cooling or water cooling. In natural air cooling, due to the open structure of the iron tapping trough, high-temperature harmful gases and dust generated during operation spread widely, seriously affecting the surrounding production environment and the health of workers.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical technology, specifically to an air inlet duct airflow cooling device. Background Technology

[0002] In the ironmaking process, the main trough, a crucial furnace-front facility, is responsible for separating the slag-iron mixture flowing from the blast furnace taphole and sending it to the molten iron ladle and slag treatment facilities. The high-temperature molten iron and slag spraying from the blast furnace taphole expose the refractory material in the main trough to a high-temperature working environment. Practice shows that the main causes of permanent layer damage in the main trough include long-term chemical erosion and scouring of the working layer by high-temperature slag and iron, as well as thermal stress generated by thermal expansion and contraction and rapid heating and cooling of the refractory material and steel trough, leading to cracks in the refractory material. Currently, to extend the service life of the main trough, many... The existing cooling methods are mainly natural cooling or water cooling. Natural air cooling is problematic because the tapping trough is an open structure, and the high-temperature harmful gases and dust generated during operation will spread everywhere, seriously affecting the surrounding production environment and the health of the workers. As for water cooling, if the refractory material inside the steel shell is damaged, the cooling water can easily cause an explosion when it comes into contact with the molten iron. Moreover, after long-term use, the inner wall of the water pipe will rust and cause blockage, which will greatly reduce the cooling effect and shorten the service life of the tapping trough. This is extremely detrimental to the normal and orderly production of the blast furnace. Utility Model Content

[0003] To overcome the above-mentioned defects, the embodiments of this utility model provide a circulating heat exchange component, which solves the technical problem that in the prior art, the cooling methods are mainly natural cooling or water cooling. Natural air cooling is caused by the open structure of the iron outlet trough, which causes the high-temperature harmful gases and dust generated during operation to spread everywhere, seriously affecting the surrounding production environment and the health of the workers.

[0004] According to one aspect, at least one embodiment of the present invention provides an air inlet duct airflow cooling device, including... The enclosure has ventilation connecting pipes at its opposite ends; A circulating heat exchange assembly is mounted on the housing; A positioning support assembly is disposed at the bottom of the housing; The circulating heat exchange assembly includes a plug pipe with an internal insertion interface that is connected to the interior of the housing. A heat exchange tube is connected to the insertion interface, and heat exchange fins are provided on the upper and lower end faces of the heat exchange tube. The heat exchange fins are connected to the heat exchange tube, and a connecting flange is provided at the end of the plug pipe.

[0005] For example, the circulating heat exchange assembly provided in at least one embodiment of this utility model further includes: A sealing ring is provided on the connecting flange. There are two sealing rings, and a connecting hole is provided at the interval between the two sealing rings.

[0006] According to another aspect, at least one embodiment of the present invention also provides a positioning support assembly, including: a positioning shaft, on which a connecting base is fitted, and the number of the connecting bases is as follows, with the connecting bases respectively disposed at the four corners of the lower end face of the housing.

[0007] For example, in at least one embodiment of the present invention, the positioning support assembly further includes: a plug-in locking groove, the plug-in locking groove being opened on the side wall of the positioning shaft, the upper end face of the connecting base having a positioning locking groove, the inner side wall of the positioning locking groove being provided with a positioning locking block, and the positioning locking block being embedded inside the plug-in locking groove.

[0008] As a further technical solution, the side wall of the enclosure is provided with a short insertion tube, which is sealed and inserted into the air passage connection tube.

[0009] As a further technical solution, the outer wall of the insertion short tube is provided with an anti-slip sealing pad, and the number of anti-slip sealing pads is several, with multiple anti-slip sealing pads evenly placed on the insertion short tube.

[0010] As a further technical solution, ventilation openings are provided on both opposite sides of the housing, and the ventilation openings are connected to the plug-in short pipe.

[0011] As a further technical solution, the heat exchange tube has a U-shaped structure, and the heat exchange fins match the shape of the heat exchange tube.

[0012] The beneficial effects of this utility model are as follows: In this invention, a stable and suitable airflow temperature ensures that the hot blast from the hot blast stove enters the blast furnace efficiently during blast furnace ironmaking, preventing the blast furnace temperature from dropping due to problems such as air leakage in the air inlet device and high-temperature blast leakage. This ensures that the blast furnace can operate continuously, stably, and efficiently, improving the production efficiency of ironmaking. For the blast furnace air inlet device, a good cooling device can prevent air leakage at the spherical joint, avoid the metal parts from oxidizing and expanding due to air leakage, and prevent the metal parts from becoming red-hot or even burning through due to high temperature, thus extending the service life of the air inlet device. In the iron tapping trough stage, adopting a suitable cooling method, such as using compressed air as the cooling medium, can quickly and evenly cool the cooling space outside the steel shell of the iron trough, effectively reducing the temperature of the iron trough when tapping iron in the blast furnace, and correspondingly extending the service life of the main iron trough. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0014] Figure 1 This is a schematic diagram of the airflow cooling device for the air inlet pipe in one embodiment of the present invention; Figure 2 for Figure 1 Cross-sectional view of the box in the embodiment; Figure 3 This is a side view of the heat exchange tube of the airflow cooling device for the air inlet pipe in one embodiment of the present invention; Figure 4 This is a side view of the connecting flange of the air inlet pipe airflow cooling device in one embodiment of the present invention; Figure 5 This is an isometric view of the connection base of the air inlet pipe airflow cooling device in one embodiment of the present invention; In the diagram: 1. Housing; 2. Air vent connection pipe; 3. Circulating heat exchange assembly; 3-1. Insert pipe; 3-2. Insert interface; 3-3. Heat exchange tube; 3-4. Heat exchange fins; 3-5. Connecting flange; 3-6. Sealing ring; 3-7. Connecting hole; 4. Positioning support assembly; 4-1. Positioning shaft; 4-2. Connecting base; 4-3. Insert locking groove; 4-4. Positioning locking groove; 4-5. Positioning locking block; 5. Insert short pipe; 6. Anti-slip sealing gasket; 7. Ventilation opening. Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0015] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0016] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0018] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] like Figures 1-5 As shown, it illustrates an air inlet duct airflow cooling device according to an embodiment of the present invention, comprising, Box 1, with ventilation connecting pipes 2 installed at opposite ends of box 1; Circulating heat exchange component 3 is installed on the housing 1; Positioning support component 4 is located at the bottom of housing 1.

[0021] This embodiment provides a circulating heat exchange component 3, which is connected to the interior of the housing 1 via a plug pipe 3-1. A heat exchange tube 3-3 is connected to the plug pipe 3-2, and heat exchange fins 3-4 are provided on the upper and lower ends of the heat exchange tube 3-3. The heat exchange fins 3-4 are connected to the heat exchange tube 3-3. A connecting flange 3-5 is provided at the end of the plug pipe 3-1. This realizes that the assembly of the air inlet pipe airflow cooling device follows the process of "basic positioning - core component integration - connection sealing". First, the position of the housing 1 is fixed by the positioning support component 4, then the circulating heat exchange component 3 is connected to the housing 1, and finally the air passage is assembled to ensure that the coaxiality and sealing of each component meet the functional requirements.

[0022] refer to Figure 1 and Figure 5 In some embodiments, the circulating heat exchange assembly 3 further includes: a sealing ring 3-6, which is disposed on the connecting flange 3-5, and there are two sealing rings 3-6, with a connecting hole 3-7 provided at the interval between the two sealing rings 3-6.

[0023] Insert the connecting end of the heat exchange tube 3-3 into the insertion port 3-2 of the insertion tube 3-1, ensuring that the heat exchange tube 3-3 and the insertion port 3-2 are coaxially connected. Since the insertion port 3-2 is connected to the inside of the box 1, after the heat exchange tube 3-3 is inserted, it must be ensured that it does not interfere with the internal space of the box 1, and the arrangement direction of the heat exchange tube 3-3 forms an effective heat exchange angle with the airflow direction inside the box 1. Install two sealing rings 3-6 on the connecting flange 3-5 at the end of the insertion pipe 3-1. The two sealing rings 3-6 are arranged at intervals, and the interval area is reserved for the position of the connection hole 3-7. The sealing rings 3-6 must be completely fitted with the end face of the connecting flange 3-5 to ensure the sealing performance when connected to the external heat exchange system.

[0024] In this embodiment, in order to better position the support, a positioning support component 4 is provided at the bottom of the box body 1. The positioning support component 4 includes a positioning shaft 4-1, and a connecting base 4-2 is fitted on the positioning shaft 4-1. The number of connecting bases 4-2 is as follows, and the several connecting bases 4-2 are respectively located at the four corners of the lower end face of the box body 1.

[0025] The positioning shaft 4-1 is vertically fixed to the lower end face of the housing 1, ensuring that the axis of the positioning shaft 4-1 is perpendicular to the bottom surface of the housing 1. The four positioning shafts 4-1 correspond to the four corners of the housing 1, forming a stable support structure. The connecting base 4-2 is then fitted onto the positioning shaft 4-1, aligning the positioning locking groove 4-4 on the upper end face of the connecting base 4-2 with the insertion locking groove 4-3 on the side wall of the positioning shaft 4-1. The connecting base 4-2 is pushed until the positioning locking block 4-5 is fully embedded in the insertion locking groove 4-3, achieving circumferential and axial positioning of the connecting base 4-2 and the positioning shaft 4-1, preventing relative sliding after assembly. Also includes: The insertion locking groove 4-3 is opened on the side wall of the positioning shaft 4-1. The upper end face of the connecting base 4-2 has a positioning locking groove 4-4. The inner side wall of the positioning locking groove 4-4 is provided with a positioning locking block 4-5, which is embedded in the interior of the insertion locking groove 4-3.

[0026] The side wall of the housing 1 is provided with a short insertion pipe 5, which is sealed and inserted into the air passage connection pipe 2.

[0027] The external airflow to be cooled enters through the air-passing connecting pipe 2 at one end of the housing 1, and enters the interior of the housing 1 through the plug-in short pipe 5 and the vent 7. It flows along the length of the housing 1. When the airflow in the housing 1 flows through the heat exchange tube 3-3 and the heat exchange fins 3-4, it exchanges heat with the circulating heat exchange medium in the heat exchange tube 3-3. The heat exchange fins 3-4 increase the heat exchange area and accelerate the cooling of the airflow. The cooled airflow is discharged through the vent 7, the plug-in short pipe 5 and the air-passing connecting pipe 2 at the other end of the housing 1, completing the airflow cooling process. The external heat exchange system is connected to the plug-in pipe 3-1 through the connecting flange 3-5. The heat exchange medium enters the heat exchange tube 3-3 through the plug-in interface 3-2, exchanges heat with the airflow, and then flows back to the external system through the plug-in pipe 3-1 to achieve circulating heat exchange.

[0028] For example, such as Figure 1 As shown, the outer wall of the insertion short tube 5 is provided with an anti-slip sealing pad 6. There are several anti-slip sealing pads 6, and multiple anti-slip sealing pads 6 are evenly arranged on the insertion short tube 5.

[0029] In this embodiment, several anti-slip sealing gaskets 6 are fitted onto the outer wall of the insertion short tube 5 to ensure that the anti-slip sealing gaskets 6 are evenly distributed along the axial direction of the insertion short tube 5 and are tightly fitted to the outer wall of the insertion short tube 5 without wrinkles or gaps. The air passage connecting tube 2 is then sealed and inserted into the insertion short tube 5. During the insertion process, it is ensured that the inner wall of the air passage connecting tube 2 is in full contact with the anti-slip sealing gaskets 6. The elasticity of the anti-slip sealing gaskets 6 is used to achieve a sealed fixation between the air passage connecting tube 2 and the insertion short tube 5, preventing airflow leakage.

[0030] For example, such as Figure 1 As shown, ventilation openings 7 are provided on both opposite sides of the housing 1, and the ventilation openings 7 are connected to the insertion short pipe 5.

[0031] In this embodiment, the plug-in short pipe 5 is fixed to the side wall of the housing 1, so that the plug-in short pipe 5 is fully connected to the ventilation openings 7 on opposite sides of the housing 1, ensuring that the axis of the ventilation openings 7 and the plug-in short pipe 5 are aligned, forming a smooth airflow channel.

[0032] For example, such as Figure 3 As shown, heat exchange tube 3-3 has a U-shaped structure, and heat exchange fins 3-4 match the shape of heat exchange tube 3-3.

[0033] In this embodiment, heat exchange fins 3-4 are installed on the upper and lower end faces of heat exchange tube 3-3. Since heat exchange fins 3-4 are connected to heat exchange tube 3-3, it is necessary to ensure that there is no leakage at the connection between the two. Furthermore, the arrangement direction of heat exchange fins 3-4 matches the U-shaped structure of heat exchange tube 3-3, and they completely fit the surface of heat exchange tube 3-3 to maximize the heat exchange contact area.

[0034] During operation, the air inlet duct airflow cooling device works on the synergistic effect of forced convection heat transfer and medium circulation heat exchange. It constructs a "cold source conduction path" through the circulation heat exchange component 3 and forms an "airflow heat exchange space" using the box 1, ultimately achieving efficient cooling of the airflow to be cooled. The specific principle can be divided into the following three core links: I. Principles of Airflow Guidance and Heat Exchange Space Construction The device forms a closed heat exchange chamber with the housing 1 as the core. The air-passing connecting pipes 2 at both ends of the housing 1 are connected to the side wall ventilation openings 7 through the plug-in short pipes 5, forming a complete airflow channel of "inlet-heat exchange chamber-outlet". When the external airflow to be cooled enters from one end of the air-passing connecting pipe 2, it is guided by the channel structure to flow along the length of the housing 1. During the process, the airflow will evenly cover the surface of the heat exchange tubes 3-3 and heat exchange fins 3-4 in the housing 1, providing sufficient contact conditions for heat exchange. At the same time, the anti-slip sealing gasket 6 on the outside of the plug-in short pipe 5 fills the gaps by elastic compression, preventing the airflow from leaking from the connection point during the flow, ensuring that all airflow flows through the heat exchange area and improving the heat exchange efficiency.

[0035] II. Heat exchange principle of circulating heat exchange component 3 The circulating heat exchange component 3 is the core actuator for achieving cooling. Its operation relies on a dual mechanism of "circulating heat exchange medium" and "finned enhanced heat exchange." The external low-temperature heat exchange medium (such as coolant, cooling gas, etc.) is connected to the insertion pipe 3-1 through the connecting flange 3-5, and enters the interior of the U-shaped heat exchange tube 3-3 through the insertion port 3-2, circulating along the path of the heat exchange tube 3-3. When the high-temperature airflow in the housing 1 flows over the surface of the heat exchange tube 3-3, the heat in the airflow is transferred to the inner wall of the heat exchange tube 3-3 through heat conduction. The heat is then absorbed by the low-temperature medium flowing inside the tube. The heat exchange fins 3-4 installed on the upper and lower end faces of the heat exchange tube 3-3, because they are connected to and tightly fitted with the heat exchange tube 3-3, greatly increase the heat exchange area, making the contact between the airflow and the heat exchange structure more sufficient, accelerating the transfer rate of heat from the airflow to the heat exchange medium, and solving the problem of insufficient heat exchange area relying solely on the heat exchange tube 3-3. In addition, the double sealing rings 3-6 on the connecting flange 3-5 can prevent the heat exchange medium from leaking when connected to the external system, ensuring the stability of the heat exchange medium circulation.

[0036] III. Positioning Support and System Coordination Principles Although the positioning support component 4 does not directly participate in heat exchange, it ensures stable heat exchange through "rigid positioning + anti-loosening fixation". The positioning shafts 4-1 at the four corners of the housing 1 and the connecting base 4-2 are precisely aligned through the cooperation of the plug-in locking grooves 4-3 and positioning locking blocks 4-5, keeping the housing 1 in a fixed posture during operation. This prevents the housing 1 from shifting due to airflow impact or equipment vibration, thereby preventing changes in the contact position between the heat exchange tubes 3-3 and the airflow and affecting the heat exchange effect. At the same time, the stability of the positioning structure also ensures that the relative position of the air passage and the heat exchange components is fixed, ensuring that the airflow always flows through the heat exchange area along the preset path, achieving continuous and stable cooling.

[0037] In summary, this device efficiently transfers the heat of the airflow to be cooled to the circulating medium through the coordinated operation of "directional airflow - heat absorption by the heat exchange medium - stable structural support", thus completing the airflow cooling process.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An airflow cooling device for an air inlet duct, characterized in that, include The box (1) has ventilation connecting pipes (2) at its opposite ends; A circulating heat exchange assembly (3) is disposed on the housing (1); Positioning support assembly (4), which is disposed at the bottom of the housing (1); The circulating heat exchange assembly (3) includes a plug pipe (3-1), and the plug pipe (3-1) is provided with a plug interface (3-2) inside. The plug interface (3-2) is connected to the interior of the housing (1). A heat exchange tube (3-3) is connected to the plug interface (3-2). Heat exchange fins (3-4) are provided on the upper and lower end faces of the heat exchange tube (3-3). The heat exchange fins (3-4) are connected to the heat exchange tube (3-3). A connecting flange (3-5) is provided at the end of the plug pipe (3-1).

2. The air inlet duct airflow cooling device according to claim 1, characterized in that, Also includes: A sealing ring (3-6) is provided on the connecting flange (3-5). There are two sealing rings (3-6), and a connecting hole (3-7) is provided at the interval between the two sealing rings (3-6).

3. The airflow cooling device for the air inlet duct according to claim 1, characterized in that, The positioning support component (4) includes a positioning shaft (4-1), on which a connecting base (4-2) is fitted. The number of connecting bases (4-2) is as follows, and the connecting bases (4-2) are respectively located at the four corners of the lower end face of the box (1).

4. The air inlet duct airflow cooling device according to claim 3, characterized in that, Also includes: A plug-in locking groove (4-3) is opened on the side wall of the positioning shaft (4-1). A positioning locking groove (4-4) is opened on the upper end face of the connecting base (4-2). A positioning locking block (4-5) is provided on the inner side wall of the positioning locking groove (4-4). The positioning locking block (4-5) is embedded in the interior of the plug-in locking groove (4-3).

5. The airflow cooling device for the air inlet duct according to claim 1, characterized in that, The side wall of the box (1) is provided with a short plug-in pipe (5), and the short plug-in pipe (5) is sealed and plugged into the air passage connection pipe (2).

6. The airflow cooling device for the air inlet duct according to claim 5, characterized in that, The outer wall of the plug-in short tube (5) is provided with an anti-slip sealing pad (6), and there are several anti-slip sealing pads (6), which are evenly arranged on the plug-in short tube (5).

7. The airflow cooling device for the air inlet duct according to claim 5, characterized in that, Ventilation openings (7) are provided on both sides of the box (1), and the ventilation openings (7) are connected to the insertion short pipe (5).

8. The airflow cooling device for the air inlet duct according to claim 1, characterized in that, The heat exchange tube (3-3) has a U-shaped structure, and the heat exchange fins (3-4) match the shape of the heat exchange tube (3-3).

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