An in-furnace cooling device for an intermediate frequency furnace

Abstract

This invention discloses an in-furnace cooling device for a medium-frequency furnace, comprising a main air duct with multiple guide vanes fixedly mounted on it in a spiral arrangement, and multiple branch pipes fixedly mounted on it, each corresponding to one of the guide vanes. The outlet of the branch pipes faces the guide vanes, and each branch pipe has an air collection section. By mounting multiple guide vanes on the main air duct, when the air entering the main air duct cools the furnace lining, part of the airflow enters the branch pipes through the air collection section and is blown by the branch pipes to the guide vanes. The airflow blowing towards the bottom through the main air duct changes direction after passing through a rectifier plate, turning upward. When the airflow passes the guide vanes, it comes into contact with the airflow blown out of the branch pipes, and under the action of the spiral guide vanes, forms a spiral upward airflow, improving the dust cleaning efficiency inside the furnace lining. At the same time, the spiral upward airflow can effectively cover the entire surface of the inner wall of the furnace lining, avoiding large temperature differences between different areas inside the furnace lining.

Description

Technical Field

[0001] This invention relates to the field of metallurgical auxiliary equipment technology, and specifically to an in-furnace cooling device for a medium-frequency furnace. Background Technology

[0002] After the smelting in the medium frequency furnace is completed, for safety, efficiency and equipment protection reasons, it is necessary to cool the furnace by blowing air. Generally, after the smelting in the medium frequency furnace is completed, there are metal oxide dust, refractory material debris and other impurities remaining on the surface and in the gaps of the refractory material inside the furnace.

[0003] In existing technologies, single-outlet direct airflow or simple duct air supply modes are mostly used to cool the furnace. Direct airflow causes the airflow to impact the refractory surface, with wind speeds reaching 5-8 m / s, forming strong turbulence. This picks up surface dust and diffuses it from the furnace opening, with dust concentrations reaching over 100 mg / m³, polluting the workshop environment and endangering the health of operators. If filters are installed at the furnace opening to reduce dust, ordinary filters will age and fail due to the high temperature. Furthermore, dust will circulate and rise within the furnace, making it difficult to settle and affecting cooling and cleaning efficiency. At the same time, the limited air supply range of a single duct leads to uneven cooling of the furnace lining, with local temperature differences exceeding 200°C, which can damage the furnace lining. Summary of the Invention

[0004] The purpose of this invention is to provide an in-furnace cooling device for medium-frequency furnaces to overcome the above-mentioned shortcomings in the prior art.

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

[0006] A furnace cooling device for an intermediate frequency furnace includes a main air duct, on which a plurality of guide vanes are fixedly arranged in a spiral arrangement. A plurality of branch pipes are fixedly arranged on the main air duct, with each branch pipe corresponding to one of the guide vanes. The air outlet of each branch pipe is directly opposite the guide vane, and each branch pipe is provided with an air collection section located inside the main air duct.

[0007] Multiple rectifier plates are fixedly installed at the bottom of the main air duct;

[0008] It also includes a wind cover that is fixedly installed on the main air duct, and the wind cover is fastened to the furnace body;

[0009] The alignment component aligns the main air duct with the center of the furnace lining when it is inserted into the furnace lining.

[0010] Preferably, it also includes a lifting frame, on which a support pipe is fixedly installed, and a sliding frame is slidably installed on the support pipe. A connecting part is fixedly installed on the sliding frame, and the connecting part is fixedly connected to the main air duct.

[0011] Preferably, a fixing rod is fixedly provided on the support tube, and a first abutting part is fixedly provided on the fixing rod, the first abutting part abutting with the furnace body.

[0012] Preferably, the fixed rod is slidably provided with two sliding rods, and each of the two sliding rods is fixedly provided with a second abutting part, which abuts against the furnace body.

[0013] Preferably, a vertical rod is fixedly mounted on the sliding frame, and a pull block is slidably mounted on the vertical rod. A connecting rod is provided between each of the two sliding rods and the pull block, and the two ends of the connecting rod are rotatably connected to the sliding rod and the pull block, respectively.

[0014] Preferably, a rotating rod is rotatably provided on the vertical rod, the rotating rod is provided with a spiral groove, and a protrusion is fixedly provided on the pull block, the protrusion being slidably disposed in the spiral groove.

[0015] Preferably, a motor is fixedly mounted on the vertical rod, and the output shaft of the motor is fixedly connected to the rotating rod.

[0016] Preferably, it also includes a carrier vehicle, the lifting frame is slidably mounted on the carrier vehicle, and an electric telescopic rod is fixedly mounted on the carrier vehicle, the telescopic end of the electric telescopic rod being fixedly connected to the lifting frame.

[0017] Preferably, an air outlet pipe is fixedly installed on the wind hood, and a cyclone separator is fixedly installed on the carrier vehicle, with the air outlet pipe connected to the inlet of the cyclone separator.

[0018] Preferably, an axial flow fan is fixedly installed on the carrier vehicle, and an air supply pipe is fixedly installed on the main air duct and connected to the axial flow fan through the air supply pipe.

[0019] In the above technical solution, the furnace cooling device for a medium-frequency furnace provided by the present invention has the following beneficial effects:

[0020] By installing multiple guide vanes on the main air duct and arranging them in a spiral pattern, when the air intake of the main air duct cools the furnace lining, part of the airflow enters the distribution pipe from the air collection section and is blown by the distribution pipe to the guide vanes. The airflow blown towards the bottom through the main air duct changes direction after passing through the rectifier plate, and the airflow rises. When it passes through the guide vanes, it comes into contact with the airflow blown out of the distribution pipe, and under the action of the spiral guide vanes, a spiral upward airflow is formed, which improves the dust cleaning efficiency inside the furnace lining. At the same time, the spiral upward airflow can effectively cover the entire surface of the inner wall of the furnace lining and avoid the phenomenon of large temperature differences between different areas inside the furnace lining.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0022] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the manifold structure and cooling process provided in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the lifting frame structure provided in an embodiment of the present invention;

[0027] Figure 4 This is a structural schematic diagram of the carrier vehicle, support tube, and sliding frame provided in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the rotating rod and pull block structure provided in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Furnace body; 11. Furnace lining; 2. Main air duct; 21. Air supply duct; 22. Guide vane; 23. Rectifier plate; 24. Diverter pipe; 25. Air collection section; 3. Air hood; 31. Air outlet duct; 4. Lifting frame; 41. Support pipe; 42. Fixing rod; 43. First abutment part; 5. Sliding frame; 51. Connecting part; 52. Vertical rod; 53. Rotating rod; 54. Spiral groove; 55. Motor; 6. Sliding rod; 61. Second abutment part; 62. Connecting rod; 7. Pull block; 71. Protrusion; 8. Carrier cart; 81. Electric telescopic rod. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] Please refer to 1-5. A furnace cooling device for an intermediate frequency furnace includes a main air duct 2. Multiple guide vanes 22 are fixedly installed on the main air duct 2 in a spiral arrangement. Multiple branch pipes 24 are fixedly installed on the main air duct 2, each corresponding to one of the guide vanes 22. The air outlet of each branch pipe 24 is directly opposite the guide vane 22, and each branch pipe 24 has an air collection section 25 located inside the main air duct 2. Multiple rectifier plates 23 are fixedly installed at the bottom of the main air duct 2. It also includes a wind hood 3 fixedly installed on the main air duct 2, which is fastened to the furnace body 1; a straightening assembly, which aligns the main air duct 2 with the center of the furnace lining 11 when the main air duct 2 is inserted into the furnace lining 11. Air enters through the main air duct 2, and the airflow enters the diversion pipe 24 through the air collection part 25. The airflow is then guided by the diversion pipe 24 and blown onto the spirally distributed guide vanes 22. The airflow reaching the bottom of the main air duct 2 changes direction and flows upward after passing through the rectifier plate 23 and the guide at the bottom of the furnace lining 11. The rising airflow interacts with the airflow in the diversion pipe 24. The blown airflow combines with the spiral guide vanes 22, causing the airflow to rise in a spiral pattern. During this process, the airflow can fully contact the inner wall of the furnace lining 11, avoiding large local temperature differences during cooling and protecting the furnace lining 11. At the same time, the spirally rising airflow carries the dust inside the furnace lining 11 upwards, forming a stable upward process and preventing dust from flying around due to airflow turbulence, thus improving the efficiency of airflow carrying dust out of the furnace. The function of the rectifier plate 23 is to control the airflow and prevent it from blowing directly to the bottom of the inner wall of the furnace lining 11. At the same time, it provides a certain resistance to ensure the strength of the airflow output from the diversion pipe 24. Multiple rectifier plates 23 are provided, and openings are set on the rectifier plates 23 to stabilize the airflow. By setting the wind hood 3, the dust inside the furnace lining 11 is prevented from spreading to the working environment. The correction component is set so that the main air pipe 2 can be aligned with the center position of the furnace lining 11 more quickly and accurately when cooling and cleaning the furnace lining 11, improving the overall efficiency.

[0033] Specifically, it also includes a lifting frame 4, on which a support pipe 41 is fixedly installed. A sliding frame 5 is slidably installed on the support pipe 41. A connecting part 51 is fixedly installed on the sliding frame 5. The connecting part 51 is fixedly connected to the main air duct 2. The main air duct 2 is connected to the main air duct 2 through the connecting part 51 on the sliding frame 5. When the main air duct 2 is inserted into the furnace lining 11, the main air duct 2 can be slid and adjusted by sliding the sliding frame 5 on the support pipe 41. The horizontal position of the main air duct 2 can be adjusted. At the same time, after adjustment, the lifting frame 4 can move the support pipe 41 and the sliding frame 5 downward to realize the downward movement of the main air duct 2 and insert the main air duct 2 into the furnace lining 11.

[0034] In a further embodiment of the present invention, a fixing rod 42 is fixedly provided on the support tube 41, and a first abutting part 43 is fixedly provided on the fixing rod 42. The first abutting part 43 abuts against the furnace body 1. When the first abutting part 43 abuts against the furnace body 1, the main air pipe 2 is located above the furnace body 1. At this time, the longitudinal position of the main air pipe 2 is fixed. After the sliding frame 5 slides the main air pipe 2 laterally, the main air pipe 2 can be aligned with the center position of the furnace lining 11.

[0035] Furthermore, the fixed rod 42 is slidably provided with two sliding rods 6, each of which is fixedly provided with a second abutment part 61, which abuts against the furnace body 1. A vertical rod 52 is fixedly provided on the sliding frame 5, and a pull block 7 is slidably provided on the vertical rod 52. A connecting rod 62 is provided between each of the two sliding rods 6 and the pull block 7, and the two ends of the connecting rod 62 are rotatably connected to the sliding rods 6 and the pull block 7 respectively. After the first abutment part 43 abuts against the furnace body 1, and the longitudinal position of the main air duct 2 is determined, the pull block 7 moves upward, through... The connecting rod 62 pulls the two sliding rods 6 to slide against the second abutment part 61. Because the lateral position of the main air duct 2 is not aligned with the furnace lining 11 at this time, one of the second abutment parts 61 will first abut against the furnace body 1. After abutment, the sliding rod 6 on one side of the second abutment part 61 will be restricted from sliding. At this time, the pulling block 7 continues to move upward, which will pull the other side of the sliding rod 6 to slide against the second abutment part 61. During this process, the connecting rod 62 on the side that has completed abutment will rotate, and the connecting rod 62 on the side that has not completed abutment will also rotate and drive the sliding rod 6 to slide against the second abutment part 61. The two abutment parts 61 slide, and at the same time, the vertical rod 52, under the action of the connecting rod 62, will slide laterally along the sliding frame 5 and the main air duct 2. Under the constraint of the two connecting rods 62, the pull block 7 and the vertical rod 52 are always located between the two second abutment parts 61. During the upward movement of the pull block 7, the vertical rod 52 will slide laterally along the sliding frame 5 and the main air duct 2, completing the adjustment of the lateral position of the main air duct 2. When the two second abutment parts 61 abut against the two sides of the furnace body 1 respectively, the vertical rod 52 will slide laterally along the main air duct 2. The lateral position is adjusted so that the main air duct 2 is aligned with the center of the furnace lining 11 in the middle of the furnace body 1. At this point, the longitudinal position of the main air duct 2 is fixed by the first abutment part 43 abutting against the furnace body 1. The lateral position of the main air duct 2 is adjusted by the sliding of the two second abutment parts 61 and their abutment against the furnace body 1, allowing the main air duct 2 to be directly aligned with the center of the furnace lining 11. This improves the portability of the main air duct 2 in terms of lateral and longitudinal position correction. It should be noted that the lateral and longitudinal positions mentioned in this invention are... Figure 3 The system is marked with indicators. By adjusting the system in both the horizontal and vertical directions, the main air duct 2 is aligned with the furnace lining 11. This prevents the main air duct 2 from scraping against the inner wall of the furnace lining 11 or from shifting and affecting the cooling and cleaning effect when it descends.

[0036] Furthermore, a rotating rod 53 is rotatably mounted on the vertical rod 52, and a spiral groove 54 is provided on the rotating rod 53. A protrusion 71 is fixedly mounted on the pull block 7, and the protrusion 71 is slidably disposed in the spiral groove 54. A motor 55 is fixedly mounted on the vertical rod 52, and the output shaft of the motor 55 is fixedly connected to the rotating rod 53. The motor 55 drives the rotating rod 53 to rotate. Through the cooperation between the spiral groove 54 on the rotating rod 53 and the protrusion 71, the pull block 7 slides and rises on the vertical rod 52 to complete the lateral position adjustment of the main air duct 2. The motor 55 is only used to make the pull block 7 slide. During the lateral sliding adjustment of the vertical rod 52, the sliding frame 5, and the main air duct 2, the motor 55 also slides with the vertical rod 52, which does not affect the driving of the pull block 7 by the motor 55.

[0037] In a further embodiment of the present invention, a carrier 8 is also included, a lifting frame 4 is slidably mounted on the carrier 8, and an electric telescopic rod 81 is fixedly mounted on the carrier 8. The telescopic end of the electric telescopic rod 81 is fixedly connected to the lifting frame 4. After the main air pipe 2 is aligned with the center position of the furnace lining 11, the electric telescopic rod 81 can drive the lifting frame 4 to descend, so that the main air pipe 2 is inserted into the furnace lining 11 to cool and clean the furnace lining 11. The electric telescopic rod 81 can be replaced by other lifting devices such as hydraulic rods.

[0038] In the embodiments provided by the present invention, an air outlet pipe 31 is fixedly installed on the wind hood 3, and a cyclone separator is fixedly installed on the carrier 8, with the air outlet pipe 31 connected to the inlet of the cyclone separator. An axial flow fan is fixedly installed on the carrier 8, and an air supply pipe 21 is fixedly installed on the main air pipe 2 and connected to the axial flow fan through the air supply pipe 21. The functions of air supply and air collection are achieved by setting up the axial flow fan and the cyclone separator. The cyclone separator can also separate dust. The furnace body 1, furnace lining 11, axial flow fan and cyclone separator mentioned in the present invention are all prior art and will not be described in detail. Setting the axial flow fan and cyclone separator on the carrier 8 can play a counterweight effect and ensure the stability of the carrier 8.

[0039] Working principle: During cooling, the carrier 8 is pushed so that the first abutment part 43 abuts against the furnace body 1, and the furnace body 1 is positioned between the two second abutment parts 61. Then, the motor 55 drives the rotating rod 53 to rotate, and through the cooperation of the spiral groove 54 and the protrusion 71, the pull block 7 rises. During the rising process, the pull block 7 pulls the connecting rod 62, causing the sliding rod 6 to slide, so that the second abutment parts 61 on both sides slide. During the sliding process, one of the second abutment parts 61 abuts against the furnace body 1 first. After the abutment is completed, the second abutment part 61 and the sliding rod 6 will not continue to slide. At this time, the motor 55 continues to drive the rotating rod 53 to rotate, causing the pull block 7 to move upward. At this time, the connecting rod on the side that has abutted... 62 will only rotate, and the sliding rod 6 on the other side will continue to slide with the second abutment part 61. During this process, the vertical rod 52 will also slide horizontally with the sliding frame 5 and the main air pipe 2. During the upward movement of the pull block 7, under the action of the two connecting rods 62, the vertical rod 52 will always be located in the middle position of the two second abutment parts 61. After the two second abutment parts 61 are in contact with the furnace body 1, the main air pipe 2 is directly in the center of the furnace lining 11. Then, the lifting frame 4 can be moved downward with the main air pipe 2 by the electric telescopic rod 81. The main air pipe 2 is inserted into the furnace lining 11, and the wind cover 3 covers the top of the furnace lining 11. Then, the axial flow fan and cyclone separator are started to cool and clean the furnace lining 11.

[0040] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A furnace cooling device for an intermediate frequency furnace, comprising a main air duct (2), characterized in that, Multiple guide vanes (22) are fixedly installed on the main air duct (2). The guide vanes (22) are spirally distributed. Multiple branch pipes (24) are fixedly installed on the main air duct (2). The multiple branch pipes (24) correspond one-to-one with the multiple guide vanes (22). The air outlet position of the branch pipe (24) is directly opposite the guide vane (22). The branch pipe (24) is provided with an air collection part (25), and the air collection part (25) is located inside the main air duct (2). Multiple rectifier plates (23) are fixedly installed at the bottom of the main air duct (2); It also includes a wind hood (3) fixedly installed on the main air duct (2), the wind hood (3) being fastened to the furnace body (1); The alignment component aligns the main air duct (2) with the center of the furnace lining (11) when the main air duct (2) is inserted into the furnace lining (11).

2. An in-furnace cooling device for an intermediate frequency furnace according to claim 1, characterized in that, It also includes a lifting frame (4), on which a support pipe (41) is fixedly installed, and a sliding frame (5) is slidably installed on the support pipe (41). A connecting part (51) is fixedly installed on the sliding frame (5), and the connecting part (51) is fixedly connected to the main air duct (2).

3. The furnace cooling device for a medium-frequency furnace according to claim 2, characterized in that, A fixing rod (42) is fixedly installed on the support tube (41), and a first abutting part (43) is fixedly installed on the fixing rod (42), which abuts against the furnace body (1).

4. A cooling device for an intermediate frequency furnace according to claim 3, wherein The fixed rod (42) is slidably provided with two slide rods (6), and each slide rod (6) is fixedly provided with a second abutment part (61), which abuts against the furnace body (1).

5. An in-furnace cooling device for an intermediate frequency furnace according to claim 4, wherein A vertical rod (52) is fixedly installed on the sliding frame (5), and a pull block (7) is slidably installed on the vertical rod (52). A connecting rod (62) is provided between the two sliding rods (6) and the pull block (7). The two ends of the connecting rod (62) are rotatably connected to the sliding rod (6) and the pull block (7) respectively.

6. The furnace cooling device for a medium-frequency furnace according to claim 5, characterized in that, A rotating rod (53) is rotatably mounted on the vertical rod (52), and a spiral groove (54) is provided on the rotating rod (53). A protrusion (71) is fixedly mounted on the pull block (7), and the protrusion (71) is slidably mounted in the spiral groove (54).

7. A furnace cooling device for an intermediate frequency furnace according to claim 6, characterized in that, A motor (55) is fixedly installed on the vertical rod (52), and the output shaft of the motor (55) is fixedly connected to the rotating rod (53).

8. A furnace cooling device for an intermediate frequency furnace according to claim 2, characterized in that, It also includes a carrier vehicle (8), the lifting frame (4) is slidably mounted on the carrier vehicle (8), and an electric telescopic rod (81) is fixedly mounted on the carrier vehicle (8), the telescopic end of the electric telescopic rod (81) is fixedly connected to the lifting frame (4).

9. A furnace cooling device for an intermediate frequency furnace according to claim 8, characterized in that, An air outlet pipe (31) is fixedly installed on the hood (3), and a cyclone separator is fixedly installed on the carrier vehicle (8), with the air outlet pipe (31) connected to the inlet of the cyclone separator.

10. An in-furnace cooling device for an intermediate frequency furnace according to claim 8, wherein An axial flow fan is fixedly installed on the carrier vehicle (8), and an air supply pipe (21) is fixedly installed on the main air pipe (2), and is connected to the axial flow fan through the air supply pipe (21).

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