Direct-current submerged arc furnace and smoke hood thereof

Abstract

The invention belongs to the technical field of smelting mechanical equipment, and particularly relates to a direct-current submerged arc furnace and a smoke hood thereof.The direct-current submerged arc furnace comprises a smoke hood body, an exhaust pipe is fixedly connected to the interior of the smoke hood body, a filter plate is slidably connected to one end of the exhaust pipe, and a fixing plate is arranged on one side of the filter plate; the fixing plates are fixedly connected with the inner wall of the smoke hood body, a moving frame is slidably connected between the fixing plates, a fixing block is fixedly connected to the upper surface of the moving frame, a moving block is arranged on one side of the fixing block, and the moving block is slidably connected with the inner wall of the moving frame. According to the invention, the fixed block and the movable block are arranged to reciprocate below the filter plate, so that stove ash accumulated below the filter plate can be cleaned, and the stove ash cannot be accumulated on the filter plate, so that the filter plate is kept clean and works efficiently, and the problem that the filter plate is blocked by the stove ash is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of smelting mechanical equipment, in particular to a direct current ore-fired furnace and a smoke hood thereof. Background Art

[0002] The smoke hood in the DC ore-fired furnace can collect and utilize the waste gas generated during production. At the same time, the smoke hood can also help reduce the heat loss of the circuit and lower the temperature on the top of the electrode, thereby improving the operating conditions.

[0003] When the existing DC electric arc furnace smoke hood is in use, a large amount of high-temperature smoke and dust will be generated during the operation of the DC electric arc furnace. The smoke hood will concentrate the generated smoke and dust, and a filter plate is arranged inside the smoke hood. The filter plate will block large particles in the smoke and dust to prevent the large particles from following the smoke into the exhaust pipe, so that the large particles adhere to the inner wall of the exhaust pipe, causing the exhaust pipe to be blocked, thereby causing the problem of hindering the emission of exhaust gas.

[0004] After the above-mentioned existing DC electric arc furnace smoke hood is used, large particles are accumulated under the filter plate. These particles continue to accumulate under the filter plate to form a thick layer of sediment. This layer of sediment will hinder the air from passing through the filter plate, and some particles will also enter the filter holes of the filter plate, thereby reducing the exhaust efficiency of the smoke hood. If the filter plate is not cleaned in time after use, the exhaust efficiency of the smoke hood will be significantly reduced in subsequent work, making it impossible to discharge the exhaust gas generated in the furnace in time, and the pressure in the furnace will rise, thereby causing the problem of reduced combustion efficiency of the DC electric arc furnace.

[0005] To this end, the present invention provides a direct current ore-fired furnace and a smoke hood thereof. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a smoke hood described in the present invention comprises a smoke hood body, an exhaust pipe is fixedly connected to the interior of the smoke hood body, one end of the exhaust pipe is slidably connected to a filter plate, a fixed plate is provided on one side of the filter plate, the fixed plate and the inner wall of the smoke hood body are fixedly connected, a movable frame is slidably connected between the fixed plates, the upper surface of the movable frame is fixedly connected with a fixed block, a movable block is provided on one side of the fixed block, and the movable block is slidably connected to the inner wall of the movable frame; when smoke ash accumulates on the surface of the filter plate, the movable frame can be driven to slide between the fixed plates, and the movable frame drives the fixed block and the movable block to move synchronously, and the fixed block and the movable block can clean the smoke ash accumulated under the filter plate, and at the same time the movable block moves to the filter hole inside the filter plate, which can drive the movable block to rise and automatically clean the filter hole.

[0008] Preferably, the internal thread connection of the movable frame is connected with a reciprocating screw rod, a positioning rod is provided on one side of the reciprocating screw rod, the positioning rod is slidably connected to the inside of the movable frame, one end of the reciprocating screw rod is rotationally connected to the fixed plate, and one end of the positioning rod is fixedly connected to the fixed plate.

[0009] Preferably, one end of the reciprocating screw is fixedly connected to a second bevel gear, the upper surface of the smoke hood body is fixedly connected to a motor, the output end of the motor is fixedly connected to a first bevel gear, and the first bevel gear and the second bevel gear are meshed with each other.

[0010] Preferably, a sliding rod is provided on one side of the filter plate, the sliding rod is fixedly connected to the inner wall of the smoke hood body, the interior of the filter plate and the surface of the sliding rod are slidably connected, and a first spring is fixedly connected between the filter plate and one end of the sliding rod.

[0011] Preferably, one end of the moving block is fixedly connected to a moving rod, one end of the moving rod is fixedly connected to a limiting frame, the limiting frame and the lower surface of the moving frame are slidably connected, one end of the limiting frame is internally fixedly connected to the limiting rod, a limiting groove is provided on the inner wall of the fixed plate, and the inside of the limiting groove is slidably connected to one end of the limiting rod.

[0012] Preferably, the limiting groove includes a transverse section, a vertical section is provided on one side of the transverse section, an inclined section is provided on one side of the vertical section, a reset section is provided on one side of the inclined section, the reset section is communicated with the transverse section, and the depth of the reset section is less than the depth of the transverse section.

[0013] Preferably, an elastic telescopic rod is fixedly connected between the limiting frame and the movable frame, and a movable end of the elastic telescopic rod is fixedly connected to the limiting frame.

[0014] Preferably, a magnetic rod is slidably connected to the inside of the smoke hood body, one end of the magnetic rod is fixedly connected to a top plate, the top plate is located below the limiting rod, a second spring is fixedly connected between the magnetic rod and the smoke hood body, an electromagnet is fixedly connected to the upper surface of the smoke hood body, and the electromagnet and the magnetic rod are attracted to each other when energized.

[0015] Preferably, a slide groove is provided on the surface of the moving rod, and the slide groove includes a storage section, and a rotating section is provided on one side of the storage section. The inner wall of the moving frame is rotatably connected to a limiting pulley, and the limiting pulley is internally slidably connected to the slide groove, and one side of the moving block is set to an arc shape.

[0016] A DC electric arc furnace comprises a smoke hood, the DC electric arc furnace also comprises a furnace body and a transformer, a furnace cover is installed on the furnace body, a smoke hood body is installed above the furnace cover, a feeding device for conveying raw materials to the furnace body is installed on the smoke hood body, an electrode lifting and pressing device for adjusting the position of the conveying electrode in the furnace is arranged on one side of the feeding device, the electrode lifting and pressing device is installed on the smoke hood body, an electrode is installed at the output end of the electrode lifting and pressing device, and the transformer is used to supply the electrode with energy required for generating an arc.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The DC ore-fired furnace and its smoke hood described in the present invention are provided with a filter plate, a fixed block and a movable block. The fixed block and the movable block reciprocate under the filter plate to clean the ash accumulated under the filter plate, so that the ash will not accumulate on the filter plate, thereby keeping the filter plate clean and working efficiently, avoiding the filter plate being blocked by ash, hindering the smooth discharge of gas, reducing the exhaust efficiency, and causing the problem of reduced working efficiency of the DC ore-fired furnace.

[0019] 2. A DC ore-fired furnace and its smoke hood described in the present invention have a moving block and a limit slot. When the moving block moves to the vertical section of the limit slot, the electromagnet drives the top plate to move upward, and the top plate drives the limit rod to move upward, and the limit rod slides in the vertical section. At this time, the limit rod drives the moving block above the limit frame to move, and the moving block moves to the filter holes inside the filter plate. At this time, the moving block can clean the impurities blocked in the filter holes. At the same time, when the moving block slides in the inclined section, it drives the filter plate to slide horizontally. When the moving block is completely separated from the filter holes, the filter plate is reset by the first spring. At this time, the filter plate vibrates, and the fine impurities or attachments remaining in the filter holes can be shaken off, thereby avoiding the reduction of exhaust efficiency caused by the blockage of furnace ash impurities. The filter holes will hinder the smooth discharge of gas, thereby causing the problem of reduced high-temperature flue gas recovery efficiency.

[0020] 3. The DC electric arc furnace and its smoke hood described in the present invention are provided with a slide groove. When the moving block moves toward the inside of the filter hole, the moving block slides in the rotating section of the slide groove through the limiting pulley, so that the moving block rotates synchronously during the movement. The rotation of the moving block can clean the inner wall of the filter hole, that is, the inner wall of the filter hole can be cleaned in all directions, avoiding insufficient contact between the inclined surface of the moving block and the inner wall of the filter hole, which causes the stubborn impurities and dirt on the inner wall of the filter hole to continue to adhere, so that the subsequent impurities and furnace ash contact to block the filter hole again, resulting in reduced exhaust efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1It is a schematic diagram of the overall structure of the furnace body of the present invention;

[0023] Figure 2 The present invention Figure 1 A partial enlarged view of the middle part;

[0024] Figure 3 It is a schematic diagram of the overall structure of the smoke hood body of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the exhaust pipe of the present invention;

[0026] Figure 5 is a structural cross-sectional view of the exhaust pipe of the present invention;

[0027] Figure 6 It is a bottom view of the structure of the filter plate and the movable frame of the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the mobile frame and the fixed plate of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the limiting groove of the present invention;

[0030] Fig. 9 is a cross-sectional view of the internal structure of the mobile rack of the present invention;

[0031] Fig.10 It is a structural schematic diagram of the moving block of the present invention;

[0032] In the figure: 1, smoke hood body; 11, exhaust pipe; 12, filter plate; 121, slide bar; 122, first spring; 2, fixed plate; 21, limit groove; 211, horizontal section; 212, vertical section; 213, inclined section; 214, reset section; 22, positioning rod; 3, reciprocating screw; 31, motor; 32, first bevel gear; 33, second bevel gear; 4, moving frame; 41, fixed block; 42, moving block; 421. moving rod; 422. slide slot; 4221. storage section; 4222. rotating section; 423. limit frame; 43. limit rod; 44. elastic telescopic rod; 45. limit pulley; 5. electromagnet; 51. magnetic rod; 52. second spring; 53. top plate; 6. furnace body; 61. furnace cover; 62. transformer; 63. electrode; 64. feeding device; 65. electrode lifting and pressing device; 66. smoke exhaust pipe. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] Embodiment 1

[0035] like Figures 1 to 10As shown, a smoke hood described in an embodiment of the present invention comprises a smoke hood body 1, an exhaust pipe 11 is fixedly connected inside the smoke hood body 1, a filter plate 12 is slidably connected to one end of the exhaust pipe 11, a fixed plate 2 is arranged on one side of the filter plate 12, the fixed plate 2 is fixedly connected to the inner wall of the smoke hood body 1, a movable frame 4 is slidably connected between the fixed plates 2, a fixed block 41 is fixedly connected to the upper surface of the movable frame 4, a movable block 42 is arranged on one side of the fixed block 41, and the movable block 42 is slidably connected to the inner wall of the movable frame 4; when soot accumulates on the surface of the filter plate 12, the movable frame 4 can be driven to slide between the fixed plates 2, the movable frame 4 drives the fixed block 41 and the movable block 42 to move synchronously, the fixed block 41 and the movable block 42 can clean the soot accumulated below the filter plate 12, and at the same time, the movable block 42 moves to the filter hole inside the filter plate 12, and the movable block 42 can be driven to rise and automatically clean the filter hole.

[0036] The DC ore-fired furnace will generate a large amount of smoke when it is working. The smoke hood will collect the smoke and dust, and a filter plate is installed inside the smoke hood to block the large particles in the smoke and dust. Then the collected smoke will be transported to the subsequent processing equipment or discharged into the atmosphere through the smoke hood.

[0037] After the existing DC ore-fired furnace hood is used, large particles accumulate under the filter plate. These particles continue to accumulate under the filter plate to form a thick layer of sediment, which will block the passage of air through the filter plate, and some particles will enter the filter holes of the filter plate, reducing the exhaust efficiency of the hood. If the filter plate is not cleaned in time, the discharge of exhaust gas will be hindered, and some exhaust gas will re-enter the ore-fired furnace, resulting in an imbalance in the concentration of the mixed gas, thereby causing the problem of reduced combustion efficiency, which will cause the exhaust efficiency of the hood to be significantly reduced, making it impossible to discharge the exhaust gas generated in the furnace in time, and the pressure in the furnace will rise, thereby causing the problem of reduced combustion efficiency of the DC ore-fired furnace;

[0038] In order to solve the above problems, the first embodiment of the present invention is used as follows: a large amount of high-temperature smoke and dust is generated when the DC electric arc furnace is working. The high-temperature smoke and dust enter the interior of the smoke hood body 1. The impurities carried in the high-temperature smoke and dust are filtered through the filter plate 12 below the exhaust pipe 11. The smoke and dust adhere to the bottom of the filter plate 12. At this time, the moving frame 4 is driven to move, and the moving frame 4 drives the fixed block 41 and the moving block 42 to slide synchronously. The upper part of the fixed block 41 and the moving block 42 contacts the lower part of the filter plate 12, so that the fixed block 41 and the moving block 42 clean the impurities attached to the lower part of the filter plate 12;

[0039] In the first embodiment of the present invention, the dust particles carried in the flue gas can be filtered by setting the filter plate 12, and impurities are attached to the filter plate 12, thereby preventing the particles in the flue gas from entering the exhaust pipe 11 and clogging the exhaust pipe 11. Moreover, the ash accumulated under the filter plate 12 can be cleaned by the fixed block 41 and the movable block 42 after use, so that the ash will not accumulate on the filter plate 12, thereby keeping the filter plate 12 clean and working efficiently, avoiding the filter plate 12 being blocked by ash, hindering the smooth discharge of gas, reducing the exhaust efficiency, and causing the problem of reduced working efficiency of the DC electric arc furnace.

[0040] like Figure 5 and Figure 6 As shown, the internal thread connection of the movable frame 4 is connected with a reciprocating screw rod 3, a positioning rod 22 is provided on one side of the reciprocating screw rod 3, the positioning rod 22 is slidably connected to the inside of the movable frame 4, one end of the reciprocating screw rod 3 is rotationally connected to the fixed plate 2, and one end of the positioning rod 22 is fixedly connected to the fixed plate 2.

[0041] Specifically, when it is necessary to drive the mobile machine to reciprocate, the reciprocating screw 3 is driven to rotate, and the reciprocating screw 3 drives the mobile frame 4 to slide on the surface of the positioning rod 22. At this time, the mobile frame 4 can drive the moving block 42 and the fixed block 41 to reciprocate under the filter plate 12, thereby realizing the cleaning operation of impurities under the filter plate 12.

[0042] like Figure 5 and Figure 6 As shown, one end of the reciprocating screw rod 3 is fixedly connected to a second bevel gear 33, the upper surface of the smoke hood body 1 is fixedly connected to a motor 31, the output end of the motor 31 is fixedly connected to a first bevel gear 32, and the first bevel gear 32 and the second bevel gear 33 are meshed with each other.

[0043] Specifically, when it is necessary to drive the reciprocating screw 3 to rotate, the motor 31 can be turned on to work, and the motor 31 drives the first bevel gear 32 to rotate. The first bevel gear 32 and the second bevel gear 33 are meshed, so that the second bevel gear 33 drives the reciprocating screw 3 to rotate. At this time, the reciprocating screw 3 can drive the movable frame 4 to reciprocate on the positioning rod 22.

[0044] Embodiment 2

[0045] like Figures 7 to 9 As shown, compared with Example 1, another embodiment of the present invention is: a sliding rod 121 is provided on one side of the filter plate 12, the sliding rod 121 is fixedly connected to the inner wall of the smoke hood body 1, the interior of the filter plate 12 and the surface of the sliding rod 121 are slidably connected, and a first spring 122 is fixedly connected between the filter plate 12 and one end of the sliding rod 121.

[0046] like Fig. 9 As shown, one end of the moving block 42 is fixedly connected to a moving rod 421, one end of the moving rod 421 is fixedly connected to a limiting frame 423, the limiting frame 423 and the lower surface of the moving frame 4 are slidably connected, one end of the limiting frame 423 is internally fixedly connected to the limiting rod 43, and a limiting groove 21 is provided on the inner wall of the fixed plate 2, and the inside of the limiting groove 21 is slidably connected to one end of the limiting rod 43.

[0047] like Figure 8 As shown, the limiting groove 21 includes a transverse section 211, a vertical section 212 is provided on one side of the transverse section 211, an inclined section 213 is provided on one side of the vertical section 212, a reset section 214 is provided on one side of the inclined section 213, the reset section 214 is communicated with the transverse section 211, and the depth of the reset section 214 is less than the depth of the transverse section 211.

[0048] like Fig. 9 As shown, an elastic telescopic rod 44 is fixedly connected between the limiting frame 423 and the movable frame 4, and the movable end of the elastic telescopic rod 44 is fixedly connected to the limiting frame 423.

[0049] Specifically, when the filter plate 12 is used to filter impurities in the flue gas, when the flue gas contains dust, carbon black, unburned fuel particles and other solid impurities, these particles flow with the flue gas and gradually clog the filter holes when they pass through the filter plate 12, thereby causing the problem of reduced exhaust efficiency of the hood;

[0050] In order to solve the above problems, the use of the second embodiment is as follows: the reciprocating screw 3 rotates and drives the moving frame 4 to reciprocate on the positioning rod 22, and the moving frame 4 drives the limiting rod 43 to move synchronously. One end of the limiting rod 43 slides in the limiting groove 21 inside the fixed plate 2. When the limiting rod 43 is in the transverse section 211 of the limiting groove 21, the upper part of the moving block 42 and the fixed block 41 are in contact with the lower part of the filter plate 12, so that the impurities under the filter plate 12 can be cleaned. When the limiting rod 43 slides in the transverse section 211 and moves to the vertical section 212, the elastic telescopic rod 44 drives the limiting rod 43 to move synchronously. The frame 423 slides inside the movable frame 4, so that the limiting frame 423 slides toward one side of the filter hole of the filter plate 12, and the limiting frame 423 drives the limiting rod 43 to slide synchronously, so that the limiting rod 43 slides in the vertical section 212. At this time, the limiting frame 423 drives the moving block 42 to move upward, and the moving block 42 is directly below the filter hole of the filter plate 12, so that the moving block 42 moves toward the inside of the filter hole. One end of the moving block 42 is set to be conical, so that the stubborn impurities blocked in the filter hole contact with the moving block 42 and are pushed and broken. At this time, the impurities blocked in the filter hole can be cleaned;

[0051] Then the limiting rod 43 moves from the vertical section 212 to the inclined section 213. At this time, the moving block 42 is inside the filter hole. Therefore, when the moving frame 4 drives the moving block 42 to slide horizontally, the moving block 42 drives the filter plate 12 to slide horizontally. The filter plate 12 slides horizontally and stretches the first spring 122.

[0052] The limiting rod 43 slides from the inclined section 213 to the next set of transverse sections 211. At this time, the moving block 42 is completely separated from the filter holes of the filter plate 12, and the moving block 42 and the fixed block 41 cooperate to clean the bottom of the filter plate 12. Then, the filter plate 12 is shaken by the first spring 122, and the fine impurities or attachments remaining in the filter holes can be shaken off.

[0053] Repeat the last operation to completely clean the filter hole, then the limit rod 43 moves to the reset section 214, the limit rod 43 drives the limit rod 43 to move to one side of the limit rod 43, the limit rod 43 drives the moving block 42 to slide to the inner side of the moving frame 4, the limit rod 43 slides in the reset section 214, when the limit rod 43 slides from the reset section 214 to the transverse section 211, the filter plate 12 can be cleaned again;

[0054] The second embodiment can clean the impurities that clog the filter holes, thus avoiding the problem of reduced exhaust efficiency caused by clogging of ash impurities. The filter holes will hinder the smooth discharge of gas, thereby causing reduced high-temperature flue gas recovery efficiency.

[0055] like Fig.10 As shown, a magnetic rod 51 is slidably connected inside the smoke hood body 1, one end of the magnetic rod 51 is fixedly connected to a top plate 53, and the top plate 53 is located below the limiting rod 43. A second spring 52 is fixedly connected between the magnetic rod 51 and the smoke hood body 1, and an electromagnet 5 is fixedly connected to the upper surface of the smoke hood body 1. After power is applied, the electromagnet 5 and the magnetic rod 51 are attracted to each other.

[0056] Specifically, when a large amount of impurities accumulate in the filter hole and the resistance formed is greater than the force of the spring telescopic rod, the moving block 42 cannot clear the impurities blocked in the filter hole.

[0057] In order to avoid the above-mentioned problems, the present invention is used as follows: when the filter plate 12 is cleaned of impurities, the electromagnet 5 can be turned on, the electromagnet 5 is energized and the magnetic rod 51 is adsorbed, so that the magnetic rod 51 slides to the outside of the smoke hood body 1, and the magnetic rod 51 drives the top plate 53 to move synchronously, and the top plate 53 drives the limit rod 43 to move synchronously upward. When the limit rod 43 is in the vertical section 212, the top plate 53 pushes the limit rod 43, and the limit rod 43 pushes the moving block 42 on the limit frame 423, so that the moving block 42 is subjected to the thrust of the top plate 53 and the upward resetting action of the elastic telescopic rod 44, and the moving block 42 can clear the impurities in the filter hole.

[0058] like Figure 4 As shown, a slide groove 422 is provided on the surface of the moving rod 421, and the slide groove 422 includes a storage section 4221. A rotating section 4222 is provided on one side of the storage section 4221. The inner wall of the moving frame 4 is rotatably connected to a limiting pulley 45. The limiting pulley 45 is internally slidably connected to the slide groove 422, and one side of the moving block 42 is set to an arc shape.

[0059] Specifically, since the upper part of the movable block 42 is set to be cone-shaped, the impurities in the filter hole can be squeezed and crushed when the filter hole is cleaned, but the conical surface cannot fully contact the inner wall of the filter hole. When there are stubborn impurities on the inner wall of the filter hole, some impurities will still remain in the filter hole after the movable block 42 crushes them, so that the subsequent impurities and ash contact the filter hole again, resulting in reduced exhaust efficiency.

[0060] When the limit rod 43 is in the horizontal section 211, the limit pulley 45 is in the interface of the rotating section 4222 and the receiving section 4221 in the slide groove 422. When the moving block 42 moves toward the inside of the filter hole, the moving block 42 drives the moving rod 421 to move synchronously, and the moving rod 421 drives the slide groove 422 to slide synchronously. At this time, the limit pulley 45 slides in the rotating section 4222 of the slide groove 422, so that when the moving rod 421 moves upward, the moving block 42 rotates synchronously. The side surface of the moving block 42 is arranged in an arc shape and fits the inner wall of the filter hole. Therefore, the rotation of the moving block 42 can fully contact the impurities on the inner wall of the filter hole and perform the cleaning operation. At the same time, when the moving block 42 rotates, the effect of squeezing and crushing the impurities can be improved. When the limit rod 43 is in the reset section 214, the limit pulley 45 is inside the receiving section 4221. At this time, the moving rod 421 drives the moving block 42 to slide toward the inner side of the moving frame 4.

[0061] The device can clean all-round impurities on the inner wall of the filter hole and facilitate the operation of crushing impurities, avoiding the problem that the inclined surface of the moving block 42 and the inner wall of the filter hole are not in sufficient contact, so that stubborn impurities and dirt on the inner wall of the filter hole continue to adhere, and subsequent impurities and ash contact to block the filter hole again, resulting in reduced exhaust efficiency.

[0062] A DC electric arc furnace comprises a smoke hood, the DC electric arc furnace further comprises a furnace body 6 and a transformer 62, a furnace cover 61 is installed on the furnace body 6, a smoke hood body 1 is installed above the furnace cover 61, a feeding device 64 for conveying raw materials to the furnace body 6 is installed on the smoke hood body 1, an electrode lifting and pressing device 65 for adjusting the position of a conveying electrode 63 in the furnace is arranged on one side of the feeding device 64, the electrode lifting and pressing device 65 is installed on the smoke hood body 1, an electrode 63 is installed at the output end of the electrode lifting and pressing device 65, and the transformer 62 is used to supply the electrode 63 with energy required to generate an arc.

[0063] Specifically, when the DC electric arc furnace is in use, the feeding device 64 continuously transports raw materials into the furnace body 6, and converts the input AC power into DC power through the rectifier transformer 62 for use in the electric arc furnace. The DC current enters the charge through the electrode 63, and an arc is formed between the electrode 63 and the ore. The high temperature of the arc causes the ore to heat up and melt rapidly. Subsequently, the position of the electrode 63 is adjusted by controlling the electrode lifting and pressing device 65 to ensure product quality and energy utilization efficiency. The flue gas generated by the operation of the DC electric arc furnace enters the smoke hood body 1, and is then discharged to the exhaust pipe 66 through the exhaust pipe 11 of the smoke hood body 1, so as to recover the heat of the high-temperature flue gas.

[0064] Working principle: the feeding device 64 continuously transports raw materials into the furnace body 6, and converts the input AC power into DC power through the rectifier transformer 62, and supplies it to the ore arc furnace. The DC current enters the furnace charge through the electrode 63, and an arc is formed between the electrode 63 and the ore. The high temperature of the arc causes the ore to heat up and melt rapidly. Then, the position of the electrode 63 is adjusted by controlling the electrode lifting and pressing device 65 to ensure product quality and energy utilization efficiency. The smoke generated by the operation of the DC ore arc furnace enters the smoke hood body 1;

[0065] The high-temperature smoke enters the interior of the smoke hood body 1, and the impurities carried in the high-temperature smoke are filtered through the filter plate 12 below the exhaust pipe 11. The smoke adheres to the bottom of the filter plate 12. After being filtered, the high-temperature smoke is discharged into the exhaust pipe 66 through the exhaust pipe 11. The exhaust pipe 66 discharges the high-temperature smoke to the heat exchange device to recover the heat of the high-temperature smoke.

[0066] When use is completed, it is necessary to clean the impurities on the surface of the filter plate 12. At this time, the motor 31 and the electromagnet 5 are turned on to work, and the motor 31 drives the first bevel gear 32 to rotate, and the first bevel gear 32 and the second bevel gear 33 are meshed, so that the second bevel gear 33 drives the reciprocating screw rod 3 to rotate, and the reciprocating screw rod 3 drives the moving frame 4 to slide on the surface of the positioning rod 22. At this time, the moving frame 4 can drive the moving block 42 and the fixed block 41 to reciprocate under the filter plate 12, and the upper part of the fixed block 41 and the moving block 42 contacts the lower part of the filter plate 12, so that the fixed block 41 and the moving block 42 clean the impurities attached to the lower part of the filter plate 12;

[0067] At the same time, the moving frame 4 drives the limiting rod 43 to move synchronously, and one end of the limiting rod 43 slides in the limiting groove 21 inside the fixed plate 2. When the limiting rod 43 is in the transverse section 211 of the limiting groove 21, the upper part of the moving block 42 and the fixed block 41 are in contact with the lower part of the filter plate 12, so that the impurities under the filter plate 12 can be cleaned.

[0068] When the limiting rod 43 slides in the horizontal section 211 and moves to the vertical section 212, the electromagnet 5 is energized and adsorbs the magnetic rod 51, so that the magnetic rod 51 slides toward the outside of the smoke hood body 1, and the magnetic rod 51 drives the top plate 53 to move synchronously, and the top plate 53 drives the limiting rod 43 to move synchronously upward, and the top plate 53 pushes the limiting rod 43, and the limiting rod 43 and the elastic telescopic rod 44 push the moving block 42 on the limiting frame 423, so that the limiting frame 423 slides toward one side of the filter hole of the filter plate 12. The limit frame 423 drives the limit rod 43 to slide synchronously, so that the limit rod 43 slides in the vertical section 212. At this time, the limit frame 423 drives the moving block 42 to move upward, and the moving block 42 is directly below the filter hole of the filter plate 12, so that the moving block 42 moves toward the inside of the filter hole. One end of the moving block 42 is set to be conical, so the stubborn impurities blocked in the filter hole contact with the moving block 42 and are pushed and broken. At this time, the impurities blocked in the filter hole can be cleaned;

[0069] Then the limiting rod 43 moves from the vertical section 212 to the inclined section 213. At this time, the moving block 42 is inside the filter hole. Therefore, when the moving frame 4 drives the moving block 42 to slide horizontally, the moving block 42 drives the filter plate 12 to slide horizontally. The filter plate 12 slides horizontally and stretches the first spring 122.

[0070] The limiting rod 43 slides from the inclined section 213 to the next set of transverse sections 211. At this time, the moving block 42 is completely separated from the filter holes of the filter plate 12, and the moving block 42 and the fixed block 41 cooperate to clean the bottom of the filter plate 12. Then, the filter plate 12 is shaken by the first spring 122, and the fine impurities or attachments remaining in the filter holes can be shaken off.

[0071] Repeat the last operation to completely clean the filter hole, then the limit rod 43 moves to the reset section 214, the limit rod 43 drives the limit rod 43 to move to one side of the limit rod 43, the limit rod 43 drives the moving block 42 to slide to the inner side of the moving frame 4, the limit rod 43 slides in the reset section 214, when the limit rod 43 slides from the reset section 214 to the transverse section 211, the filter plate 12 can be cleaned again;

[0072] When the limit rod 43 is in the transverse section 211, the limit pulley 45 is in the interface between the rotating section 4222 and the receiving section 4221 in the slide groove 422. When the moving block 42 moves toward the inside of the filter hole, the moving block 42 drives the moving rod 421 to move synchronously, and the moving rod 421 drives the slide groove 422 to slide synchronously. At this time, the limit pulley 45 slides in the rotating section 4222 of the slide groove 422, so that the moving block 42 rotates synchronously when the moving rod 421 moves upward. The side surface of the moving block 42 is arranged in an arc shape and fits the inner wall of the filter hole. Therefore, the rotation of the moving block 42 can fully contact the impurities on the inner wall of the filter hole and perform a cleaning operation. At the same time, when the moving block 42 rotates, the effect of squeezing and crushing the impurities can be improved. When the limit rod 43 is in the reset section 214, the limit pulley 45 is in the inside of the receiving section 4221. At this time, the moving rod 421 drives the moving block 42 to slide toward the inner side of the moving frame 4.

[0073] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A smoke hood, characterized in that: The invention comprises a smoke hood body (1), wherein an exhaust pipe (11) is fixedly connected to the inside of the smoke hood body (1), a filter plate (12) is slidably connected to one end of the exhaust pipe (11), a fixed plate (2) is arranged on one side of the filter plate (12), the fixed plate (2) and the inner wall of the smoke hood body (1) are fixedly connected, a movable frame (4) is slidably connected between the fixed plates (2), a fixed block (41) is fixedly connected to the upper surface of the movable frame (4), a movable block (42) is arranged on one side of the fixed block (41), and the movable block (42) is arranged on the other side of the movable block (41). The movable frame (42) is slidably connected to the inner wall of the movable frame (4); when soot is accumulated on the surface of the filter plate (12), the movable frame (4) can be driven to slide between the fixed plates (2), and the movable frame (4) drives the fixed block (41) and the movable block (42) to move synchronously, and the fixed block (41) and the movable block (42) can clean the soot accumulated below the filter plate (12), and at the same time, the movable block (42) moves to the filter hole inside the filter plate (12), and can drive the movable block (42) to rise and automatically clean the filter hole.

2. A smoke hood according to claim 1, characterized in that: The internal thread of the movable frame (4) is connected to a reciprocating screw rod (3), a positioning rod (22) is provided on one side of the reciprocating screw rod (3), the positioning rod (22) is slidably connected to the inside of the movable frame (4), one end of the reciprocating screw rod (3) is rotationally connected to the fixed plate (2), and one end of the positioning rod (22) is fixedly connected to the fixed plate (2).

3. A smoke hood according to claim 2, characterized in that: One end of the reciprocating screw rod (3) is fixedly connected to a second bevel gear (33), the upper surface of the smoke hood body (1) is fixedly connected to a motor (31), the output end of the motor (31) is fixedly connected to a first bevel gear (32), and the first bevel gear (32) and the second bevel gear (33) are meshed with each other.

4. A smoke hood according to claim 3, characterized in that: A sliding rod (121) is provided on one side of the filter plate (12); the sliding rod (121) is fixedly connected to the inner wall of the smoke hood body (1); the interior of the filter plate (12) and the surface of the sliding rod (121) are slidably connected; and a first spring (122) is fixedly connected between the filter plate (12) and one end of the sliding rod (121).

5. A smoke hood according to claim 4, characterized in that: One end of the moving block (42) is fixedly connected to a moving rod (421), one end of the moving rod (421) is fixedly connected to a limiting frame (423), the limiting frame (423) and the lower surface of the moving frame (4) are slidably connected, one end of the limiting frame (423) is internally fixedly connected to the limiting rod (43), the inner wall of the fixed plate (2) is provided with a limiting groove (21), and the interior of the limiting groove (21) is slidably connected to one end of the limiting rod (43).

6. A smoke hood according to claim 5, characterized in that: The limiting groove (21) comprises a transverse section (211), a vertical section (212) is arranged on one side of the transverse section (211), an inclined section (213) is arranged on one side of the vertical section (212), a reset section (214) is arranged on one side of the inclined section (213), the reset section (214) and the transverse section (211) are connected, and the depth of the reset section (214) is less than the depth of the transverse section (211).

7. A smoke hood according to claim 6, characterized in that: An elastic telescopic rod (44) is fixedly connected between the limiting frame (423) and the movable frame (4), and a movable end of the elastic telescopic rod (44) is fixedly connected to the limiting frame (423).

8. A smoke hood according to claim 7, characterized in that: A magnetic rod (51) is slidably connected inside the smoke hood body (1); one end of the magnetic rod (51) is fixedly connected to a top plate (53); the top plate (53) is located below the limit rod (43); a second spring (52) is fixedly connected between the magnetic rod (51) and the smoke hood body (1); an electromagnet (5) is fixedly connected to the upper surface of the smoke hood body (1); and the electromagnet (5) and the magnetic rod (51) are attracted to each other when energized.

9. A smoke hood according to claim 8, characterized in that: The surface of the moving rod (421) is provided with a slide groove (422), the slide groove (422) includes a storage section (4221), one side of the storage section (4221) is provided with a rotating section (4222), the inner wall of the moving frame (4) is rotatably connected to a limiting pulley (45), the limiting pulley (45) and the inside of the slide groove (422) are slidably connected, and one side of the moving block (42) is arranged in an arc shape.

10. A DC ore-fired furnace, characterized in that: The DC ore-fired furnace comprises a smoke hood as claimed in any one of claims 1 to 9, wherein the DC ore-fired furnace further comprises a furnace body (6) and a transformer (62), wherein a furnace cover (61) is installed on the furnace body (6), a smoke hood body (1) is installed above the furnace cover (61), a feeding device (64) for conveying raw materials to the interior of the furnace body (6) is installed on the smoke hood body (1), an electrode lifting and pressing device (65) for adjusting the position of the conveying electrode (63) in the furnace is arranged on one side of the feeding device (64), the electrode lifting and pressing device (65) is installed on the smoke hood body (1), an electrode (63) is installed at the output end of the electrode lifting and pressing device (65), and the transformer (62) is used to supply the electrode (63) with energy required for generating an arc.

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