Electric furnace for steel rolling

Abstract

The electric furnace for steel rolling comprises a bottom plate, an electric furnace body and an exhaust pipe inserted into the top face of the electric furnace body, a filter plate is movably arranged in the exhaust pipe, and a cleaning mechanism is arranged on the surface of the filter plate; the cleaning mechanism comprises a sleeve rotationally arranged in the filter plate, a rotating rod is arranged in the sleeve, a fixing block is fixedly arranged at the bottom end of the rotating rod, scrapers are fixedly arranged on the two sides of the fixing block through connecting rods, and a scraping plate is fixedly arranged on the top surface of each connecting rod through a supporting rod. The invention relates to the technical field of electric furnaces. According to the electric furnace for steel rolling, through the arrangement of the cleaning mechanism, dust and other residues attached to the surface of the filter plate and the inner wall of the exhaust pipe can be scraped and cleaned, manual cleaning by personnel is not needed, the working intensity is relieved, the situation that the circulation speed of waste gas is affected due to residue accumulation can be avoided, and the subsequent heat recovery work of high-temperature waste gas is accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of electric furnaces, in particular to an electric furnace for steel rolling. Background Art

[0002] An electric furnace is a heating furnace that converts the electrical energy in the furnace into heat to heat the workpiece. Electric furnaces can be divided into resistance furnaces, induction furnaces, arc furnaces, plasma furnaces, electron beam furnaces, etc. Compared with fuel furnaces, the advantages of electric furnaces are: the atmosphere in the furnace is easy to control; the material is heated quickly; the heating temperature is high; the temperature is easy to control; the production process is easier to mechanize and automate; the labor and hygiene conditions are good; the thermal efficiency is high; the product quality is good, and it is more environmentally friendly, which is conducive to alleviating the increasingly serious environmental problems.

[0003] Electric furnaces are usually used in the production process of steel rolling. Electric furnaces will generate a large amount of high-temperature exhaust gas in the process of heating the rolled steel. According to the patent application number CN202022280434.5, the utility model can reprocess the exhaust gas generated by the electric furnace through the setting of the corresponding mechanism on the electric furnace, so that the heat energy in the exhaust gas can be recovered and reused, effectively reducing the operating cost of the electric furnace. In the process of exhaust gas recovery, users can get other conveniences;

[0004] In the above patent, high-temperature exhaust gas enters the recovery and filtering mechanism through the recovery pipe for subsequent heat recovery. When the high-temperature exhaust gas containing dust and other residues passes through the recovery pipe, the residues are easily coked and adhere to the inner wall of the pipe and the surface of the filter, which is not easy to clean. As the residues accumulate, the flow rate of the exhaust gas is affected, and the subsequent heat recovery and reuse work is further affected. Therefore, in view of the above deficiencies, the present invention makes the following improvements. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides an electric furnace for steel rolling, which solves the problems mentioned in the background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an electric furnace for steel rolling, comprising a bottom plate, an electric furnace body and an exhaust pipe inserted on the top surface of the electric furnace body, a filter plate is movably arranged inside the exhaust pipe, and a cleaning mechanism is arranged on the surface of the filter plate;

[0009] The cleaning mechanism includes a sleeve rotatably arranged inside the filter plate, and a rotating rod is arranged inside the sleeve, a fixed block is fixedly arranged at the bottom end of the rotating rod, and scrapers are fixedly arranged on both sides of the fixed block through connecting rods, a scraper is fixedly arranged on the top surface of the connecting rod through a supporting rod, and cleaning brushes are fixedly arranged on the front and back sides of the scraper, and a vibrator is arranged on the surface of the sleeve.

[0010] Preferably, the vibrating member includes a fixing ring rotatably arranged on the surface of the sleeve, and the bottom surface of the fixing ring is fixedly connected to the top surface of the filter plate through a buffer spring, an annular electromagnet is fixedly connected to the bottom surface of the fixing ring and the surface of the sleeve, and an annular iron block is fixedly connected to the top surface of the filter plate and the surface of the sleeve.

[0011] Preferably, the top end of the sleeve passes through the exhaust pipe and extends to the top end of the exhaust pipe, a motor is fixedly connected to one side of the top surface of the exhaust pipe, and one end of the motor output shaft is fixedly connected to a first gear through a coupling, and a second gear meshing with the first gear is fixedly connected to the surface of the sleeve.

[0012] Preferably, a sliding groove is provided on the surface of the rotating rod, a protrusion is fixedly provided on the inner wall of the sleeve, and the surface of the protrusion is slidably connected to the inner wall of the sliding groove, a connecting plate is fixedly connected to the top of the rotating rod, a first electric push rod is fixedly provided on one side of the exhaust pipe surface, and a U-shaped limiting plate is fixedly provided on the protruding end of the first electric push rod through an L-shaped rod, and the surface of the connecting plate is located in the recess of the U-shaped limiting plate.

[0013] Preferably, a sealing frame is provided on the top surface of the electric furnace body and located outside the exhaust pipe, second electric push rods are fixedly provided on both sides of the top surface of the sealing frame, an annular plate is provided on the surface of the exhaust pipe, and the protruding end of the second electric push rod is fixedly connected to the bottom surface of the annular plate.

[0014] Preferably, a collecting mechanism is provided on the surface of the sealing frame, and the collecting mechanism includes a collecting frame slidably arranged inside the sealing frame, a driving part for driving the collecting frame to slide left and right is provided on one side of the electric furnace body, and a sealing plate is fixedly connected to one side of the sealing frame and located on the top surface of the collecting frame.

[0015] Preferably, the driving part includes an L-shaped plate, and one side of the L-shaped plate is slidably connected to one side of the collecting frame through a T-shaped block, a U-shaped block is slidably provided on one side of the electric furnace body, and an inclined rod is rotatably provided between one side of the U-shaped block and the bottom surface of the L-shaped plate, a hydraulic cylinder is fixedly provided on one side of the electric furnace body, and the protruding end of the hydraulic cylinder is fixedly connected to the bottom surface of the U-shaped block.

[0016] Preferably, a preheating box is provided on the top surface of the bottom plate and on one side of the electric furnace body, a recovery pipe is connected between the surface of the exhaust pipe and one side of the preheating box, and an expansion joint is provided on the surface of the recovery pipe, a base is provided at the bottom of the inner wall of the preheating box, and a heat conduction plate is fixedly provided on the top surface of the base, a heat conduction pipe is provided inside the base, and one end of the recovery pipe is connected to one end of the heat conduction pipe.

[0017] (III) Beneficial effects

[0018] The present invention provides an electric furnace for steel rolling, which has the following beneficial effects:

[0019] (1) The electric furnace for steel rolling can scrape and clean the dust and other debris attached to the surface of the filter plate and the inner wall of the exhaust pipe through the setting of the cleaning mechanism, without the need for manual cleaning by personnel, thus reducing the workload, avoiding the accumulation of debris that affects the flow rate of the exhaust gas, and accelerating the subsequent heat recovery of the high-temperature exhaust gas.

[0020] (2) The electric furnace for steel rolling can automatically collect the scraped residue by setting a collection mechanism, and can collect the residue in a unified manner after a sufficient amount of residue is accumulated, thereby reducing the frequency of handling by personnel.

[0021] (3) The electric furnace for steel rolling can transfer heat to the surrounding of the materials by placing the next batch of materials to be heated into the preheating box and utilizing the recovered high-temperature gas, thereby achieving preheating treatment of the materials and recycling heat. At the same time, it also improves the subsequent heating efficiency and reduces energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of the structure of the present invention;

[0023] Figure 2 is a cross-sectional view of the exhaust pipe structure of the present invention;

[0024] Figure 3 For the present invention Figure 1 A partial enlarged view of the middle A;

[0025] Figure 4 A top view of the internal structure of the base of the present invention;

[0026] Figure 5 For the present invention Figure 1 A partial enlarged view of point B in the middle.

[0027] In the figure: 1. electric furnace body; 2. exhaust pipe; 3. filter plate; 4. cleaning mechanism; 41. sleeve; 42. rotating rod; 43. fixed block; 44. scraper; 45. scraper; 46. cleaning brush; 47. fixed ring; 48. buffer spring; 49. annular electromagnet; 410. annular iron block; 411. motor; 412. first gear; 413. second gear; 414. connecting plate; 415. first electric push rod; 416. U-shaped limit plate; 5. sealing frame; 6. collecting mechanism; 61. collecting frame; 62. sealing plate; 63. L-shaped plate; 64. U-shaped block; 65. inclined rod; 66. hydraulic cylinder; 7. preheating box; 8. recovery pipe; 9. telescopic joint; 10. heat conduction plate; 11. heat conduction pipe; 12. second electric push rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] See also Figure 1 , Figure 2 as well as Figure 5 As shown, the present invention provides a technical solution, and the specific improvements are as follows:

[0031] An electric furnace for steel rolling, comprising a bottom plate, an electric furnace body 1 and an exhaust pipe 2 inserted into the top surface of the electric furnace body 1, wherein a filter plate 3 is movably arranged inside the exhaust pipe 2, and a cleaning mechanism 4 is arranged on the surface of the filter plate 3;

[0032] The cleaning mechanism 4 includes a sleeve 41 rotatably arranged inside the filter plate 3, and a rotating rod 42 is arranged inside the sleeve 41, and a stopper is arranged at the bottom end of the sleeve 41 to prevent the filter plate 3 from falling off, the top end of the sleeve 41 penetrates the exhaust pipe 2 and extends to the top end of the exhaust pipe 2, a motor 411 is fixedly connected to one side of the top surface of the exhaust pipe 2, and one end of the output shaft of the motor 411 is fixedly connected to a first gear 412 through a coupling, and a second gear 413 meshing with the first gear 412 is fixedly connected to the surface of the sleeve 41, a sliding groove is provided on the surface of the rotating rod 42, a protrusion is fixedly arranged on the inner wall of the sleeve 41, and the surface of the protrusion is slidably connected to the inner wall of the sliding groove, and a connecting plate 414 is fixedly connected to the top end of the rotating rod 42, and a first electric push rod 415 is fixedly arranged on one side of the surface of the exhaust pipe 2, and the first electric push rod 415 is fixedly arranged on the The extended end of the push rod 415 is fixedly provided with a U-shaped limit plate 416 through an L-shaped rod, the surface of the connecting plate 414 is located in the recess of the U-shaped limit plate 416, the bottom end of the rotating rod 42 is fixedly provided with a fixed block 43, and both sides of the fixed block 43 are fixedly provided with scrapers 44 through connecting rods, the top surface of the connecting rod is fixedly provided with a scraper 45 through a supporting rod, and the front and back sides of the scraper 45 are fixedly provided with a cleaning brush 46, the surface of the sleeve 41 is provided with a vibrator, the vibrator includes a fixing ring 47 rotatably provided on the surface of the sleeve 41, and the bottom surface of the fixing ring 47 is fixedly connected to the top surface of the filter plate 3 through a buffer spring 48, the bottom surface of the fixing ring 47 and the surface located on the sleeve 41 are fixedly connected with an annular electromagnet 49, and the top surface of the filter plate 3 and the surface located on the sleeve 41 are fixedly connected with an annular iron block 410;

[0033] The motor 411 is started, so that the motor 411 drives the sleeve 41 to rotate through the first gear 412 and the second gear 413. During the rotation of the sleeve 41, the rotating rod 42 can be driven to rotate synchronously through the setting of the protrusion and the slide groove. At this time, the rotating rod 42 can drive the scraper 44 to rotate synchronously through the setting of the fixed block 43 and the connecting rod. The scraper 44 cleans the inner wall of the exhaust pipe 2 during the rotation. At the same time, the first electric push rod 415 is started, and the extended end of the first electric push rod 415 drives the U-shaped limit plate 416 to move downward through the L-shaped rod, which can drive the rotating rod 42 to move downward along the inner wall of the sleeve 41, and can scrape off the residue attached to the inner wall of the exhaust pipe 2. The rotating rod 42 is controlled to rise, so that the cleaning brush 46 and the scraper 45 are in contact with the bottom surface of the filter plate 3, and the dust and impurities blocked on the bottom surface of the filter plate 3 can be cleaned during the rotation of the rotating rod 42.

[0034] The annular electromagnet 49 is controlled to be energized, and the annular electromagnet 49 generates magnetism to adsorb the annular iron block 410. At this time, the annular iron block 410 drives the filter plate 3 to move upward along the surface of the sleeve 41 until the annular iron block 410 and the surface of the annular electromagnet 49 are adsorbed on each other. The annular electromagnet 49 is controlled to be deenergized, and the filter plate 3 moves downward under the action of the buffer spring 48. By controlling the opening and closing of the annular electromagnet 49, the filter plate 3 can be vibrated up and down, which can shake off the impurities blocked in the mesh of the filter plate 3 to a certain extent, thereby further improving the cleaning effect.

[0035] Embodiment 2

[0036] Based on Example 1, please refer to Figure 1 and Figure 3 The specific improvements are as follows:

[0037] A sealing frame 5 is provided on the top surface of the electric furnace body 1 and located outside the exhaust pipe 2. Second electric push rods 12 are fixedly provided on both sides of the top surface of the sealing frame 5. An annular plate is provided on the surface of the exhaust pipe 2. The extended end of the second electric push rod 12 is fixedly connected to the bottom surface of the annular plate. A collecting mechanism 6 is provided on the surface of the sealing frame 5. The collecting mechanism 6 includes a collecting frame 61 slidably provided inside the sealing frame 5. A driving part for driving the collecting frame 61 to slide left and right is provided on one side of the electric furnace body 1. A sealing plate 62 is fixedly connected to one side of the sealing frame 5 and located on the top surface of the collecting frame 61. The driving part includes an L-shaped plate 63, and one side of the L-shaped plate 63 is slidably connected to one side of the collecting frame 61 through a T-shaped block. A U-shaped block 64 is slidably provided on one side of the electric furnace body 1, and an inclined rod 65 is rotatably provided between one side of the U-shaped block 64 and the bottom surface of the L-shaped plate 63. A hydraulic cylinder 66 is fixedly provided on one side of the electric furnace body 1, and the protruding end of the hydraulic cylinder 66 is fixedly connected to the bottom surface of the U-shaped block 64.

[0038] Start the second electric push rod 12, so that the second electric push rod 12 drives the exhaust pipe 2 to move upward through the annular plate, so that the end inserted into the electric furnace body 1 moves to its top surface, and at the same time start the hydraulic cylinder 66, so that the protruding end of the hydraulic cylinder 66 drives the U-shaped block 64 to move downward, and due to the rotation setting of the two ends of the inclined rod 65, the L-shaped plate 63 can drive the collecting frame 61 to move toward the inside of the sealing frame 5 until the collecting frame 61 is located at the bottom end of the exhaust pipe 2, which can facilitate the collection of the cleaned impurities. After the collection is completed, the sealing frame 5 is controlled to move to the right in the same way. The setting of the sealing plate 62 can prevent dust from overflowing and scattering. When a sufficient amount of dust is collected inside the collecting frame 61, the collecting frame 61 can be slid out from the surface of the L-shaped plate 63.

[0039] Embodiment 3

[0040] Based on Example 2, please refer to Figure 1 and Figure 4 The specific improvements are as follows:

[0041] A preheating box 7 is arranged on the top surface of the bottom plate and located on one side of the electric furnace body 1, and a heat-insulating layer is arranged inside the preheating box 7. A recovery pipe 8 is connected between the surface of the exhaust pipe 2 and one side of the preheating box 7, and an expansion joint 9 is arranged on the surface of the recovery pipe 8. A base is arranged at the bottom of the inner wall of the preheating box 7, and a heat-conducting plate 10 is fixedly arranged on the top surface of the base. A heat-conducting pipe 11 is arranged inside the base, and one end of the recovery pipe 8 is connected to one end of the heat-conducting pipe 11, and the other end of the heat-conducting pipe 11 passes through the preheating box 7 and extends to the other side of the preheating box 7;

[0042] The high-temperature gas that has filtered out dust and other residues enters the heat pipe 11 through the recovery pipe 8. The personnel place the material to be heated on the top surface of the heat conduction plate 10 in advance. When the high-temperature gas flows through the heat conduction pipe 11, the heat can be quickly dissipated. With the setting of the heat conduction plate 10, the heat can be quickly transferred to the surface of the material, which can realize preheating of the material and enable the recovered heat to be reused.

[0043] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric furnace for steel rolling, comprising a bottom plate, an electric furnace body (1), and an exhaust pipe (2) inserted into the top surface of the electric furnace body (1), characterized in that: A filter plate (3) is movably arranged inside the exhaust pipe (2), and a cleaning mechanism (4) is arranged on the surface of the filter plate (3); The cleaning mechanism (4) comprises a sleeve (41) rotatably arranged inside the filter plate (3), and a rotating rod (42) is arranged inside the sleeve (41), a fixed block (43) is fixedly arranged at the bottom end of the rotating rod (42), and scrapers (44) are fixedly arranged on both sides of the fixed block (43) through connecting rods, a scraper (45) is fixedly arranged on the top surface of the connecting rod through a supporting rod, and cleaning brushes (46) are fixedly arranged on the front and back sides of the scraper (45), and a vibrating member is arranged on the surface of the sleeve (41).

2. The electric furnace for steel rolling according to claim 1, characterized in that: The vibrating member comprises a fixing ring (47) rotatably arranged on the surface of the sleeve (41), and the bottom surface of the fixing ring (47) is fixedly connected to the top surface of the filter plate (3) via a buffer spring (48); an annular electromagnet (49) is fixedly connected to the bottom surface of the fixing ring (47) and located on the surface of the sleeve (41); and an annular iron block (410) is fixedly connected to the top surface of the filter plate (3) and located on the surface of the sleeve (41).

3. The electric furnace for steel rolling according to claim 1, characterized in that: The top end of the sleeve (41) passes through the exhaust pipe (2) and extends to the top end of the exhaust pipe (2); a motor (411) is fixedly connected to one side of the top surface of the exhaust pipe (2); one end of the output shaft of the motor (411) is fixedly connected to a first gear (412) via a coupling; and a second gear (413) meshing with the first gear (412) is fixedly connected to the surface of the sleeve (41).

4. The electric furnace for steel rolling according to claim 1, characterized in that: A sliding groove is provided on the surface of the rotating rod (42), a protrusion is fixedly provided on the inner wall of the sleeve (41), and the surface of the protrusion is slidably connected to the inner wall of the sliding groove, a connecting plate (414) is fixedly connected to the top end of the rotating rod (42), a first electric push rod (415) is fixedly provided on one side of the surface of the exhaust pipe (2), and a U-shaped limiting plate (416) is fixedly provided on the protruding end of the first electric push rod (415) via an L-shaped rod, and the surface of the connecting plate (414) is located in the recess of the U-shaped limiting plate (416).

5. The electric furnace for steel rolling according to claim 1, characterized in that: A sealing frame (5) is provided on the top surface of the electric furnace body (1) and located outside the exhaust pipe (2), and second electric push rods (12) are fixedly provided on both sides of the top surface of the sealing frame (5). An annular plate is provided on the surface of the exhaust pipe (2), and the protruding end of the second electric push rod (12) is fixedly connected to the bottom surface of the annular plate.

6. The electric furnace for steel rolling according to claim 5, characterized in that: A collecting mechanism (6) is provided on the surface of the sealing frame (5), and the collecting mechanism (6) comprises a collecting frame (61) slidably arranged inside the sealing frame (5); a driving unit for driving the collecting frame (61) to slide leftward and rightward is provided on one side of the electric furnace body (1); and a sealing plate (62) is fixedly connected to one side of the sealing frame (5) and located on the top surface of the collecting frame (61).

7. The electric furnace for steel rolling according to claim 6, characterized in that: The driving part comprises an L-shaped plate (63), and one side of the L-shaped plate (63) is slidably connected to one side of the collecting frame (61) via a T-shaped block; a U-shaped block (64) is slidably provided on one side of the electric furnace body (1), and an inclined rod (65) is rotatably provided between one side of the U-shaped block (64) and the bottom surface of the L-shaped plate (63); a hydraulic cylinder (66) is fixedly provided on one side of the electric furnace body (1), and the protruding end of the hydraulic cylinder (66) is fixedly connected to the bottom surface of the U-shaped block (64).

8. The electric furnace for steel rolling according to claim 1, characterized in that: A preheating box (7) is arranged on the top surface of the bottom plate and located on one side of the electric furnace body (1); a recovery pipe (8) is connected between the surface of the exhaust pipe (2) and one side of the preheating box (7); and an expansion joint (9) is arranged on the surface of the recovery pipe (8); a base is arranged at the bottom of the inner wall of the preheating box (7); and a heat conducting plate (10) is fixedly arranged on the top surface of the base; a heat conducting pipe (11) is arranged inside the base; and one end of the recovery pipe (8) is connected to one end of the heat conducting pipe (11).

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