A steel rolling heating furnace

Abstract

The present invention discloses a steel rolling heating furnace, which includes a steel billet heating furnace, a tail gas waste heat recovery device, a heating furnace steel discharging machine and a heating furnace furnace tail. A tail gas waste heat recovery device for recovering the remaining heat of the tail gas is arranged at the front end of the steel billet heating furnace. It is applicable to the technical field of industrial production. When in use, compared with the existing method, hoisting and heating the crude steel billet will cause shaking. Manual operation not only has risks such as scalding, but also has the problem of slow production efficiency. In the present invention, the crude steel billet is pushed into the steel billet heating furnace for heating and temperature raising. After heating for a period of time, cooling water is sprayed on its surface to rapidly reduce the surface temperature of the steel billet, and then the steel billet is pushed into the steel billet heating furnace again. The above steps are repeated until the surface and the inside temperature of the steel billet are the same and reach the predetermined temperature, and then the heated steel billet can be exported through the heating furnace steel discharging machine. This equipment is relatively simple to use, not only more stable during heating, but also has high safety.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial production, and particularly relates to a steel rolling heating furnace. Background Art

[0002] As is well known, steel rolling refers to the pressure processing process in which steel billets change the shape of steel ingots and billets between rotating rolls. The purpose of steel rolling, like other pressure processing, is on the one hand to obtain the required shape, and on the other hand to improve the internal quality of steel.

[0003] During the steel rolling process of steel billets, first, combustion materials such as coke are added into the steel billet heating furnace. After igniting the coke and waiting for the temperature in the steel billet heating furnace to rise high enough, a single rough steel billet is taken and the rough steel billet is sent into the steel billet heating furnace. After the steel billet is heated to a certain temperature, the steel billet is taken out, cold water is sprayed on its surface to rapidly cool its exterior, and then the rough steel billet is sent into the steel billet heating furnace again. This operation is repeated to keep the temperature inside and outside the steel billet consistent. Then, the rough steel billet with uniform temperature after heating is sent into the rolling mill for further processing. The hardness of the rough steel billet after heating and temperature rise is greatly reduced, and its ductility is improved. It can be shaped by the rotation of the rolling rolls in the rolling mill. While being rolled into the required shape, it can also improve the internal quality of the steel. The existing method for heating rough steel billets usually uses a lifting device to lift the rough steel billet and then send it into the steel billet heating furnace for processing. The spraying of water sources is usually manually operated. Considering that the lifting and heating of rough steel billets will cause shaking, and the rough steel billets after heating have extremely high temperatures, manual operation not only poses risks such as burns, but also has the problem of slow production efficiency. In view of the existing problems, the present invention designs a steel rolling heating furnace. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a steel rolling heating furnace. It transports the rough steel billets into the heating furnace steel discharging machine through transportation, then installs a pusher on the rough steel billets, and pushes the rough steel billets into the steel billet heating furnace for heating and temperature rise. After heating for a period of time, the steel billets are taken out, and cooling water is sprayed on their surfaces to rapidly reduce the surface temperature of the steel billets. Then, the steel billets are pushed into the steel billet heating furnace again. The above steps are repeated until the temperature on the surface and inside of the steel billets is the same and reaches the predetermined temperature, and then the heated steel billets can be exported through the heating furnace steel discharging machine.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solutions: A steel rolling heating furnace includes a steel billet heating furnace, a tail gas waste heat recovery device, a heating furnace steel discharging machine, and a heating furnace furnace tail. A tail gas waste heat recovery device for recovering the remaining heat of the tail gas is provided at the front end of the steel billet heating furnace. A heating furnace steel discharging machine for feeding and discharging the crude steel billets into and out of the steel billet heating furnace is provided at the right end of the steel billet heating furnace. A crude steel billet is arranged in the heating furnace steel discharging machine. A push head for pushing the coke is installed at the left end of the crude steel billet. A heating furnace furnace tail for feeding and discharging the steel billets into and out of the heating furnace steel discharging machine is provided at the right end of the heating furnace steel discharging machine. A heat preservation cover is fixedly connected to the top end of the heating furnace furnace tail. A plurality of heat preservation plates are rotatably connected to the heat preservation cover.

[0008] To recover the waste heat in the high-temperature tail gas generated after the combustion of the coke in the steel billet heating furnace, preferably, the tail gas waste heat recovery device includes a recovery box. The recovery box is arranged at the front end of the steel billet heating furnace. A partition plate is fixedly connected in the recovery box. Two heat exchange curved pipes are installed in the recovery box. Two air outlet pipes are communicated with the front end of the steel billet heating furnace. The other ends of the two air outlet pipes are respectively communicated with the input ends of the two heat exchange curved pipes. The output ends of the two heat exchange curved pipes both pass through the partition plate and are fixedly connected with air outlet heads. A water inlet pipe and a water outlet pipe are respectively communicated with the left end and the right end of the recovery box. A waste water pipe is communicated with the front end of the recovery box. Switch valves are installed on the water inlet pipe, the water outlet pipe, and the waste water pipe.

[0009] To introduce the crude steel billet into the steel billet heating furnace and discharge the crude steel billet after heating, further, the heating furnace steel discharging machine includes a base. The base is fixedly connected to the steel billet heating furnace. A plurality of support columns are fixedly connected to the base. A table top is fixedly connected to the top ends of the plurality of support columns. A support frame is fixedly connected to the top end of the table top. A driving frame is fixedly connected to the top end of the support frame. Two driving shafts are rotatably connected in the driving frame. Driving wheels are fixedly connected to the driving shafts. A driving chain disc is fixedly connected to the rear end of the driving shaft. The two driving chain discs are connected by a driving chain. A first motor is installed at the front end of the driving frame. The output end of the first motor is fixedly connected to the front end of the driving shaft on the right side. A spraying mechanism for spraying water on the crude steel billet is arranged at the bottom end of the table top. An ash receiving mechanism for receiving the coke hooked out by the push head is arranged at the bottom end of the table top.

[0010] In order to filter and reuse the cooling water for spraying the rough steel billets, further, the spraying mechanism includes a filter box fixedly connected to the base. A water receiving hopper is communicated with the top end of the filter box. A plurality of water leakage strip openings are provided on the tabletop. A drawer opening is provided at the front end of the filter box. A filter drawer is slidably arranged in the drawer opening. Two water pumps are installed on the base. The input end of the water pump is communicated with the filter box. The output end of the water pump passes through the driving frame and extends to the driving wheel. A plurality of connecting strips are fixedly connected to the driving frame. The top ends of the plurality of connecting strips are fixedly connected with a splash guard.

[0011] In order to receive the coke hooked out by the push head, as a further solution of this scheme, the ash receiving mechanism includes an ash receiving box slidably connected to the tabletop. Two first cylinders are installed at the bottom end of the tabletop. The output ends of the two first cylinders are fixedly connected to the right end of the ash receiving box.

[0012] In order to transport the rough steel billet to the right end of the steel ingot discharging machine of the heating furnace and align it with the steel ingot discharging machine of the heating furnace, as a further solution of this scheme, the furnace tail of the heating furnace includes a furnace tail box fixedly connected to two columns on the right side. A plurality of legs are fixedly connected to the bottom end of the furnace tail box. Three transporting mechanisms are arranged in the furnace tail box. An installation plate is fixedly connected to the top end of the furnace tail box. A plurality of second cylinders are installed on the installation plate. The output ends of the plurality of second cylinders are fixedly connected with a pushing plate.

[0013] In order to transport the rough steel billet into the steel ingot discharging machine of the heating furnace, on the basis of the foregoing scheme, the transporting mechanism includes two transporting shafts rotatably connected in the furnace tail box. Transporting wheels are fixedly connected to the transporting shafts. Transporting chain discs are fixedly connected to the transporting shafts. The two transporting chain discs are driven and connected by a transporting chain. Three second motors are installed at the rear end of the furnace tail box. The output end of the second motor is fixedly connected to the rear end of the transporting shaft on the left side.

[0014] In order to seal the steel billet heating furnace when it needs to be heated up, so that the temperature rises more rapidly, further on the basis of the foregoing scheme, a fixing plate is fixedly connected to the right end of the steel billet heating furnace. A third cylinder is installed at the top end of the fixing plate. The output end of the third cylinder is fixedly connected with a sealing door. The sealing door is slidably connected to the steel billet heating furnace.

[0015] In order to make the sealing door and the ash receiving box slide stably in a predetermined direction, further on the basis of the foregoing scheme, two sliding strips are fixedly connected to the sealing door. Two sliding grooves matching the sliding strips are provided at the right end of the steel billet heating furnace. The sliding strips are slidably connected in the sliding grooves. Two sliding hooks are fixedly connected to the top end of the ash receiving box. Two hook grooves are fixedly connected to the bottom end of the tabletop. The sliding hooks are arranged in the grooves.

[0016] In order to assist the rough steel billet to accurately enter the steel billet heating furnace and improve the service life of the auxiliary wheel and the driving wheel at the same time, on the basis of the foregoing solution, further, an auxiliary frame is fixedly connected to the top end of the tabletop. An auxiliary shaft is rotatably connected inside the auxiliary frame, and an auxiliary wheel is fixedly connected to the auxiliary shaft. Both the auxiliary wheel and the driving wheel are made of metal, and wear-resistant and anti-slip coatings are provided on the surfaces of the auxiliary wheel and the driving wheel.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a rolling steel heating furnace, which has the following beneficial effects:

[0019] In the present invention, the rough steel billet can be repeatedly heated by the steel billet heating furnace. The waste heat recovery device is convenient for recovering the waste heat in the high-temperature tail gas generated after the coke burns in the steel billet heating furnace. Through the cooperation of the heating furnace steel discharging machine, the rough steel billet and the pusher, it is convenient to repeatedly put, heat, take out and cool the rough steel billet, so that the internal and external temperatures of the rough steel billet are consistent. Through the cooperation of the furnace tail of the heating furnace, the heat preservation cover and the heat preservation board, it is convenient to transport the unheated rough steel billet for heating and keep the heated rough steel billet warm. Therefore, compared with the existing method, when hoisting and heating the rough steel billet, there will be shaking, and the heated rough steel billet has a very high temperature. Manual operation not only has risks such as scalding, but also has the problem of slow production efficiency. In the present invention, the rough steel billet is transported into the heating furnace steel discharging machine through transportation, then the pusher is installed on the rough steel billet, and the rough steel billet is pushed into the steel billet heating furnace for heating and temperature rise. After heating for a period of time, the steel billet is taken out, and cooling water is sprayed on its surface to quickly reduce the surface temperature of the steel billet. Then the steel billet is pushed into the steel billet heating furnace, and the above steps are repeated until the surface and the inside of the steel billet have the same temperature and reach the predetermined temperature. Then the heated steel billet can be exported through the heating furnace steel discharging machine. This equipment is relatively simple to use and does not require too much manual operation. It is not only more stable during heating, but also has higher safety. Description of the drawings

[0020] Figure 1 It is a three-dimensional structure diagram of the whole of the present invention;

[0021] Figure 2 It is a three-dimensional structure diagram of a partial cross-section of the waste heat recovery device in the present invention;

[0022] Figure 3 It is a three-dimensional structure diagram of the decomposition of the heating furnace steel discharging machine in the present invention;

[0023] Figure 4 It is a three-dimensional structure diagram of the spraying mechanism in the present invention;

[0024] Figure 5Schematic three-dimensional structure diagram of the ash receiving mechanism of the present invention;

[0025] Figure 6 Schematic three-dimensional structure diagram of the decomposition of the furnace tail of the heating furnace in the present invention;

[0026] Figure 7 Schematic three-dimensional structure diagram of the decomposition of the fixing plate and the third cylinder, etc. in the present invention.

[0027] In the figure: 1, billet heating furnace; 2, waste heat recovery device for tail gas; 3, steel discharging machine of heating furnace; 4, rough billet; 5, pushing head; 6, furnace tail of heating furnace; 7, heat preservation cover; 8, heat preservation plate; 9, spraying mechanism; 10, ash receiving mechanism; 11, conveying mechanism; 12, fixing plate; 13, third cylinder; 14, sealing door; 15, slide bar; 16, slide hook; 17, hook groove; 18, auxiliary frame; 19, auxiliary shaft; 20, auxiliary wheel; 201, recovery box; 202, partition board; 203, heat exchange curved pipe; 204, air outlet pipe; 205, air outlet head; 206, water inlet pipe; 207, water outlet pipe; 208, waste water pipe; 209, switch valve; 301, base; 302, pillar; 303, table top; 304, support frame; 305, driving frame; 306, driving shaft; 307, driving wheel; 308, driving chain disc; 309, driving chain; 310, first motor; 901, filter box; 902, water receiving hopper; 903, filter drawer; 904, water pump; 905, connecting bar; 906, splash-proof cover; 1001, ash receiving box; 1002, first cylinder; 601, furnace tail box; 602, support leg; 603, mounting plate; 604, second cylinder; 605, pushing plate; 1101, conveying shaft; 1102, conveying wheel; 1103, conveying chain disc; 1104, conveying chain; 1105, second motor. Detailed implementation manners

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment

[0030] Please refer to Figure 1 , 2, A steel rolling heating furnace, comprising a billet heating furnace 1 and a tail gas waste heat recovery device 2. A tail gas waste heat recovery device 2 for recovering the remaining heat of the tail gas is provided at the front end of the billet heating furnace 1. The tail gas waste heat recovery device 2 includes a recovery box 201. The recovery box 201 is arranged at the front end of the billet heating furnace 1. A partition plate 202 is fixedly connected inside the recovery box 201. Two heat exchange curved pipes 203 are installed inside the recovery box 201. Two air outlet pipes 204 are connected to the front end of the billet heating furnace 1. The other ends of the two air outlet pipes 204 are respectively connected to the input ends of the two heat exchange curved pipes 203. The output ends of the two heat exchange curved pipes 203 both pass through the partition plate 202 and are fixedly connected with air outlet heads 205. The left end and the right end of the recovery box 201 are respectively connected with a water inlet pipe 206 and a water outlet pipe 207. A waste water pipe 208 is connected to the front end of the recovery box 201. Switch valves 209 are installed on the water inlet pipe 206, the water outlet pipe 207 and the waste water pipe 208. The high-temperature waste gas generated after the combustion of combustibles such as coke in the billet heating furnace 1 flows into the heat exchange curved pipes 203 through the air outlet pipes 204. When waste heat needs to be recovered, water is introduced into the water inlet pipe 206. When the high-temperature waste gas flows through the heat exchange curved pipes 203, the high temperature is transferred to the water source through the conduction of the heat exchange curved pipes 203, completing the recovery of waste heat. The heated water source can flow out through the water outlet pipe 207. Purified water is introduced into the waste water pipe 208, and the purified water submerges the air outlet heads 205. After the waste gas exchanges heat, it flows out from the air outlet heads 205, and the waste gas flows into the purified water. The impurity particles and harmful substances in the waste gas are incorporated into the purified water. A plurality of air outlet openings are provided at the middle position of the recovery box 201. The purified water will not flow out if the water level does not reach the air outlet openings. The tail gas after adsorption and purification flows out through the air outlet openings, thus completing the waste heat recovery and purification of the tail gas, avoiding the waste of resources and environmental pollution;

[0031] Please refer to Figure 3The right end of the steel billet heating furnace 1 is provided with a heating furnace steel-discharging machine 3 for feeding and discharging a rough steel billet 4 into the steel billet heating furnace 1, the heating furnace steel-discharging machine 3 is provided with a rough steel billet 4, the left end of the rough steel billet 4 is provided with a pusher 5 for pushing away the coke, the heating furnace steel-discharging machine 3 comprises a base 301, the base 301 is fixedly connected to the steel billet heating furnace 1, a plurality of pillars 302 are fixedly connected to the base 301, a table 303 is fixedly connected to the top of the plurality of pillars 302, a support frame 304 is fixedly connected to the top of the table 303, a driving frame 305 is fixedly connected to the top of the supporting frame 304, two driving shafts 306 are rotatably connected in the driving frame 305, a driving wheel 307 is fixedly connected to the driving shaft 306, a driving chain disc 308 is fixedly connected to the rear end of the driving shaft 306, and the two driving chain discs 308 are connected by a driving chain The front end of the driving frame 305 is connected to the driving shaft 309 by transmission. The first motor 310 is installed at the front end of the driving frame 305. The output end of the first motor 310 is fixedly connected to the front end of the driving shaft 306 located on the right side. The bottom end of the table 303 is provided with a spray mechanism 9 for spraying water on the rough steel embryo 4. The bottom end of the table 303 is provided with an ash receiving mechanism 10 for receiving the coke hooked out by the pusher head 5. When the first motor 310 is started, the first motor 310 drives the driving shaft 306 to rotate, the driving shaft 306 drives the driving chain disk 308 to rotate, and the driving chain disk 308 drives the driving chain 309 to rotate. Through the transmission of the driving chain 309, the two driving chain disks 308 simultaneously drive the two driving shafts 306 to rotate in the same direction, the driving shaft 306 drives the driving wheel 307 to rotate, and the driving wheel 307 moves the rough steel embryo 4 arranged above it left and right;

[0032] See also Figure 4 The spray mechanism 9 includes a filter box 901, which is fixedly connected to the base 301. The top of the filter box 901 is connected to a water receiving bucket 902. A plurality of water leakage strips are provided on the table 303. A drawer opening is provided at the front end of the filter box 901. A filter drawer 903 is slidably provided in the drawer opening. Two water pumps 904 are installed on the base 301. The input end of the water pump 904 is connected to the filter box 901. The output end of the water pump 904 extends to the driving wheel 307 through the driving frame 305. The driving frame 305 is fixedly connected to a plurality of connecting strips 905. The top of each connecting strip 905 is fixedly connected with a splash shield 906. When the water pump 904 is started, the water pump 904 draws cooling water from the filter box 901 through the drive frame 305 and sprays it onto the rough steel billet 4 at the drive wheel 307 to cool it down. The sprayed water falls onto the table 303 under the action of gravity and falls into the water receiving bucket 902 through the leaking strip. The cooling water carries the coke residue and the debris peeled off after the rough steel billet 4 is heated and falls onto the filter drawer 903 for filtration. After being filtered, the cooling water falls into the bottom of the filter box 901 and is re-drawn by the water pump 904 for circulation.

[0033] See also Figure 5, the ash receiving mechanism 10 includes an ash receiving box 1001, the ash receiving box 1001 is slidably connected to the tabletop 303, two first cylinders 1002 are installed at the bottom end of the tabletop 303, and the output ends of the two first cylinders 1002 are fixedly connected to the right end of the ash receiving box 1001. Two slide bars 15 are fixedly connected to the sealing door 14, and two chutes matching the slide bars 15 are opened at the right end of the steel billet heating furnace 1. The slide bars 15 are slidably connected in the chutes. Two sliding hooks 16 are fixedly connected to the top end of the ash receiving box 1001, and two hook grooves 17 are fixedly connected to the bottom end of the tabletop 303. The sliding hooks 16 are arranged in the grooves. When the crude steel billet 4 is heated and cooled reciprocally, the first cylinder 1002 is started, and the output end of the first cylinder 1002 extends to push the ash receiving box 1001 to the left. The ash receiving box 1001 drives the sliding hooks 16 to slide in the hook grooves 17, and the ash receiving box 1001 moves to the left and closely adheres to the steel billet heating furnace 1 to collect the coke carried out by the pusher head 5 reciprocally and centrally collect it;

[0034] Please refer to Figure 6, a heating furnace tail 6, a heating furnace tail 6 for feeding and exporting steel billets into the heating furnace steel tapping machine 3 is arranged at the right end, a heat preservation cover 7 is fixedly connected to the top of the heating furnace tail 6, and a plurality of heat preservation plates 8 are rotatably connected to the heat preservation cover 7, the heating furnace tail 6 comprises a tail box 601, the tail box 601 is fixedly connected to the two pillars 302 located on the right side, a plurality of legs 602 are fixedly connected to the bottom end of the tail box 601, three conveying mechanisms 11 are arranged in the tail box 601, and the top of the tail box 601 The end is fixedly connected with a mounting plate 603, and a plurality of second cylinders 604 are installed on the mounting plate 603. The output ends of the plurality of second cylinders 604 are fixedly connected with a pushing plate 605. When the rough steel billet 4 is transported, the rough steel billet 4 is placed on the furnace tail box 601, and the second cylinder 604 is started. The output end of the second cylinder 604 extends out to push the pushing plate, and the pushing plate 605 pushes the rough steel billet 4 into the heat preservation cover 7. The rough steel billet 4 pushes the heat preservation plate 8 away and moves into the heat preservation cover 7, and is aligned with the heating furnace steel tapping machine 3. The transport mechanism 11 The conveying shaft 1101 comprises two conveying shafts 1101, which are rotatably connected in the furnace tail box 601, and the conveying shaft 1101 is fixedly connected with a conveying wheel 1102, and the conveying shaft 1101 is fixedly connected with a conveying chain plate 1103, and the two conveying chain plates 1103 are connected by a conveying chain 1104. The rear end of the furnace tail box 601 is equipped with three second motors 1105, and the output end of the second motor 1105 is fixedly connected to the rear end of the conveying shaft 1101 on the left side. When the rough steel billet 4 needs to be conveyed into the heating furnace, When the steel machine 3 is in the steel machine, the second motor 1105 is started, the second motor 1105 drives the conveying shaft 1101 to rotate, the conveying shaft 1101 drives the conveying chain plate 1103 to rotate, the conveying chain plate 1103 drives the conveying chain 1104 to rotate, through the transmission of the conveying chain 1104, the two moving chain plates simultaneously drive the two conveying shafts 1101 to rotate in the same direction, the conveying shaft 1101 drives the conveying wheel 1102 to rotate, and the conveying wheel pushes the rough steel embryo 4 to the left, and the rough steel embryo 4 moves to the left and enters the heating furnace steel machine 3;

[0035] See also Figure 7 The right end of the steel billet heating furnace 1 is fixedly connected with a fixing plate 12, and a third cylinder 13 is installed on the top of the fixing plate 12. The output end of the third cylinder 13 is fixedly connected with a sealing door 14, and the sealing door 14 is slidably connected to the steel billet heating furnace 1. When the temperature in the steel billet heating furnace 1 needs to be increased, coke and other fuels are added from the feeding port at the top of the steel billet heating furnace 1 and ignited, and the third cylinder 13 is started. The output end of the third cylinder 13 extends out to push the sealing door 14 upward, and the sealing door 14 seals the heating port of the steel billet heating furnace 1, so that the furnace temperature in the steel billet heating furnace 1 is rapidly increased to avoid the problem of slow temperature increase caused by temperature leakage.

[0036] It should be further noted that an auxiliary frame 18 is fixedly connected to the top end of the table top 303. An auxiliary shaft 19 is rotatably connected inside the auxiliary frame 18. An auxiliary wheel 20 is fixedly connected to the auxiliary shaft 19. Both the auxiliary wheel 20 and the driving wheel 307 are made of metal material, and wear-resistant and anti-slip coatings are provided on the surfaces of the auxiliary wheel 20 and the driving wheel 307, which is convenient for assisting the rough steel billet 4 to enter the steel billet heating furnace 1 for heating, and at the same time improves the service life of the auxiliary wheel 20 and the driving wheel 307.

[0037] The first motor 310, the second motor 1105 and the water pump 904 in this embodiment are all common devices purchased on the market. Different models, powers and uses and other special versions can be purchased or customized according to actual needs. In the present invention, only their use is carried out, and their structures and functions are not improved. Their circuit connections are strictly connected and installed according to the instructions. The first motor 310, the second motor 1105 and the water pump 904 are all equipped with suitable switches, which will not be elaborated here. At the same time, in the present invention, the first cylinder 1002, the second cylinder 604 and the third cylinder 13 are all communicated with an air pump, and the equipment purchased according to the actual environment in the present invention is a special version that is heat-resistant and high-temperature resistant, and has been correctly debugged according to the requirements to ensure normal use.

[0038] When the rolling steel heating furnace is in use, the rough steel billet 4 to be heated is horizontally placed on the conveying wheel 1102. The second cylinder 604 is started, and the pushing plate 605 pushes the rough steel billet 4 into the heat preservation cover 7 to align with the steel billet discharging machine of the heating furnace. The second motor 1105 is started, and the conveying wheel 1102 starts to rotate to convey the rough steel billet 4 to move leftward. The rough steel billet 4 enters the heating furnace discharging machine 3. The rough steel billet 4 passes through the driving wheel 307 and the auxiliary wheel 20, and finally stops and is placed on the driving wheel 307 and the auxiliary wheel 20. The pushing head 5 is installed on the rough steel billet 4. The first cylinder 1002 is started, and the first cylinder 1002 pushes out the ash receiving box 1001. The first motor 310 is started, and the rough steel billet 4 moves leftward into the steel billet heating furnace 1. After a certain time of temperature rise, the first motor 310 is started in the reverse direction, and the rough steel billet 4 moves rightward and moves out of the steel billet heating furnace 1. The water pump 904 is started to quickly cool the surface of the rough steel billet 4. Then the first motor 310 is started in the forward direction to send the rough steel billet 4 into the steel billet heating furnace 1 for heating. The above operations are repeatedly performed until the internal and external temperatures of the steel billet reach the same predetermined target temperature. The pushing head 5 is removed, and the first motor 310 is started in the reverse direction. The driving wheel 307 rotates in the reverse direction to send the heated rough steel billet 4 back into the heat preservation cover 7 to complete the heating work.

[0039] The auxiliary wheel 20 in the present invention has no power, and the power source comes from the driving wheel 307. Here, the auxiliary wheel 20 only has a driven guiding function. The pusher 5 in the present invention can evenly push away the high-temperature coke in the billet heating furnace 1, avoiding the problem that the direct insertion of the crude billet 4 leads to uneven contact and uneven heating between the high-temperature coke and the crude billet 4.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel rolling heating furnace, comprising a billet heating furnace (1), characterized in that, Also includes: A tail gas waste heat recovery device (2), wherein the front end of the steel billet heating furnace (1) is provided with a tail gas waste heat recovery device (2) for recovering residual heat of the tail gas; A heating furnace steel tapping machine (3), wherein the right end of the steel billet heating furnace (1) is provided with a heating furnace steel tapping machine (3) for feeding and discharging a rough steel billet (4) into and out of the steel billet heating furnace (1), the rough steel billet (4) is arranged in the heating furnace steel tapping machine (3), and a pusher head (5) for pushing away coke is installed at the left end of the rough steel billet (4); A heating furnace tail (6), the right end of the heating furnace steel tapping machine (3) is provided with a heating furnace tail (6) for feeding and discharging steel billets into and out of the heating furnace steel tapping machine (3), the top of the heating furnace tail (6) is fixedly connected to a heat preservation cover (7), and a plurality of heat preservation plates (8) are rotatably connected to the heat preservation cover (7); The exhaust waste heat recovery device (2) comprises a recovery box (201), the recovery box (201) being arranged at the front end of the steel embryo heating furnace (1), a partition plate (202) being fixedly connected inside the recovery box (201), two heat exchange curved tubes (203) being installed inside the recovery box (201), the front end of the steel embryo heating furnace (1) being connected to two air outlet pipes (204), the other ends of the two air outlet pipes (204) being respectively connected to the input ends of the two heat exchange curved tubes (203), the output ends of the two heat exchange curved tubes (203) being both fixedly connected to air outlet heads (205) through the partition plate (202), the left end and the right end of the recovery box (201) being respectively connected to a water inlet pipe (206) and a water outlet pipe (207), the front end of the recovery box (201) being connected to a waste water pipe (208), and the water inlet pipe (206), the water outlet pipe (207) and the waste water pipe (208) being all installed with switch valves (209); The heating furnace steel tapping machine (3) comprises a base (301), the base (301) is fixedly connected to the steel billet heating furnace (1), a plurality of pillars (302) are fixedly connected to the base (301), the top ends of the plurality of pillars (302) are fixedly connected to a table (303), the top end of the table (303) is fixedly connected to a support frame (304), the top end of the support frame (304) is fixedly connected to a driving frame (305), the driving frame (305) is rotatably connected to two driving shafts (306), and the driving shaft (306) is fixedly connected to a driving wheel ( 307), a driving chain plate (308) is fixedly connected to the rear end of the driving shaft (306), and the two driving chain plates (308) are connected in transmission via a driving chain (309). A first motor (310) is installed at the front end of the driving frame (305), and an output end of the first motor (310) is fixedly connected to the front end of the driving shaft (306) located on the right side. A spray mechanism (9) for spraying water on the rough steel billet (4) is provided at the bottom end of the table top (303), and an ash receiving mechanism (10) for receiving the coke hooked out by the pusher head (5) is provided at the bottom end of the table top (303).

2. The reheating furnace for rolling steel according to claim 1, wherein, The spray mechanism (9) comprises a filter box (901), the filter box (901) is fixedly connected to the base (301), the top of the filter box (901) is connected to a water receiving bucket (902), a plurality of water leakage strip openings are provided on the table top (303), a drawer opening is provided at the front end of the filter box (901), a filter drawer (903) is slidably arranged in the drawer opening, two water pumps (904) are installed on the base (301), the input end of the water pump (904) is connected to the filter box (901), the output end of the water pump (904) passes through the driving frame (305) and extends to the driving wheel (307), a plurality of connecting strips (905) are fixedly connected to the driving frame (305), and a splash guard (906) is fixedly connected to the top of the plurality of connecting strips (905).

3. The reheating furnace for steel rolling according to claim 2, characterized in that, The ash receiving mechanism (10) comprises an ash receiving box (1001), the ash receiving box (1001) being slidably connected to the table top (303), two first cylinders (1002) being installed at the bottom end of the table top (303), and the output ends of the two first cylinders (1002) being fixedly connected to the right end of the ash receiving box (1001).

4. The reheating furnace for rolling steel according to claim 3, characterized in that, The heating furnace tail (6) comprises a tail box (601), the tail box (601) is fixedly connected to two pillars (302) located on the right side, a plurality of legs (602) are fixedly connected to the bottom end of the tail box (601), three conveying mechanisms (11) are arranged in the tail box (601), a mounting plate (603) is fixedly connected to the top end of the tail box (601), a plurality of second cylinders (604) are installed on the mounting plate (603), and a push plate (605) is fixedly connected to the output ends of the plurality of second cylinders (604).

5. A steel rolling heating furnace according to claim 4, characterized in that, The conveying mechanism (11) comprises two conveying shafts (1101), the conveying shafts (1101) are rotatably connected in the furnace tail box (601), a conveying wheel (1102) is fixedly connected to the conveying shaft (1101), a conveying chain plate (1103) is fixedly connected to the conveying shaft (1101), the two conveying chain plates (1103) are transmission-connected via a conveying chain (1104), and three second motors (1105) are installed at the rear end of the furnace tail box (601), and the output end of the second motor (1105) is fixedly connected to the rear end of the conveying shaft (1101) located on the left side.

6. A steel rolling heating furnace according to claim 5, characterized in that, A fixing plate (12) is fixedly connected to the right end of the steel billet heating furnace (1), a third cylinder (13) is installed on the top end of the fixing plate (12), a sealing door (14) is fixedly connected to the output end of the third cylinder (13), and the sealing door (14) is slidably connected to the steel billet heating furnace (1).

7. A steel rolling heating furnace according to claim 6, characterized in that, Two slide bars (15) are fixedly connected to the sealing door (14); two slide grooves matching the slide bars (15) are provided at the right end of the steel billet heating furnace (1); the slide bars (15) are slidably connected in the slide grooves; two slide hooks (16) are fixedly connected to the top of the ash receiving box (1001); and two hook grooves (17) are fixedly connected to the bottom of the table top (303); and the slide hooks (16) are arranged in the grooves.

8. A steel rolling heating furnace according to claim 7, characterized in that, The top end of the tabletop (303) is fixedly connected with an auxiliary frame (18). An auxiliary shaft (19) is rotatably connected inside the auxiliary frame (18). An auxiliary wheel (20) is fixedly connected to the auxiliary shaft (19). Both the auxiliary wheel (20) and the driving wheel (307) are made of metal, and wear-resistant and anti-slip coatings are provided on the surfaces of the auxiliary wheel (20) and the driving wheel (307).

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