Turnover type fuel gas injection device

Abstract

The invention belongs to the field of iron and steel smelting, and particularly discloses a turnover type fuel gas injection device. The device comprises a gas pipe, a blowing pipe row, a blowing cover and a driving device. A plurality of blowing covers are arranged right above the sintering pallet in a covering mode in the length direction of the sintering pallet, and blowing pipe rows fixed in the blowing covers are located above a sintering material layer, so that fuel gas is blown to the sintering material layer. The air inlet end of the blowing pipe row is detachably connected with a gas pipe arranged outside the blowing cover, and the driving device arranged on the side of the sintering trolley can drive the blowing cover to turn over, so that the blowing cover leaves the position over the sintering trolley, and therefore during overhauling, the blowing pipe row covering the upper portion of the trolley can be disconnected with the gas pipe, and the gas pipe is prevented from being blocked. And under the driving of the driving device, the blowing cover is turned over towards the side direction, so that space is vacated for maintenance, and the sintering pallet is convenient to maintain.

Description

Technical Field

[0001] This invention relates to the field of steel smelting technology, and more specifically to a rotary gas injection device. Background Technology

[0002] Sintering is a key step in the ironmaking process. Its principle is to mix various powdered iron-containing raw materials with appropriate amounts of fuel and flux, add appropriate amounts of water, mix and pelletize them, and then sinter them into blocks on sintering equipment to undergo a series of physicochemical changes, which are then sent to the blast furnace for the next step.

[0003] To reduce the coke ratio and smelting costs in blast furnace ironmaking, blast furnaces typically require sintered ore to have high strength and high reducibility. The sintering process generally requires sintered ore with high strength, high yield, low return rate, and low fuel consumption. High-strength and highly reducible sintered ore consumes less coke during blast furnace smelting, thus reducing carbon dioxide emissions. From a long-term perspective, carbon dioxide emission reduction requirements will become one of the bottlenecks restricting the development of the steel industry. According to relevant data, carbon dioxide emissions from sintering and blast furnace processes account for approximately 60% of total industrial emissions. Therefore, whether from the perspective of cost reduction for enterprises or environmental protection, reducing the proportion of solid fuel consumption in sintering and lowering the fuel ratio of blast furnace burdens have become urgent needs for ironmaking technology.

[0004] Against this backdrop, JFE Corporation of Japan developed the "Gas Fuel Injection Technology for Sintering Sheets." Its principle involves injecting gaseous fuel diluted to below the lower limit of combustible concentration onto the sintering trolley a short distance after ignition via an injection device, allowing it to burn and provide heat within the sintering sheet. This technology reduces solid carbon consumption and CO2 emissions in sinter production. Furthermore, because the combustion of the gaseous fuel widens the high-temperature zone of the sintering sheet during production, the sintering temperature of 1200–1400°C is maintained for an extended period, effectively enhancing the strength and porosity of the sinter (5–10 mm). This results in significant energy savings, emission reductions, and quality improvement.

[0005] However, due to existing gas injection technology, the gas injection device is fixed within a predetermined range on the sintering machine and is inconvenient to disassemble. Even when the sintering machine is not in operation, the gas injection device remains above it, making maintenance extremely difficult. Workers can only maintain the trolley by pushing it out of the gas injection device's coverage area section by section, which is not only labor-intensive but also has a very low safety factor, making accidents highly likely. Therefore, this invention proposes a flip-type gas injection device to reduce the impact of the gas injection device on sintering machine maintenance and facilitate maintenance. Summary of the Invention

[0006] The main objective of this invention is to provide a flip-type gas injection device to solve the problem that in the prior art, the gas injection device covers the sintering machine, making it inconvenient to maintain the sintering machine.

[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0008] A tilting gas injection device includes a gas pipe, an injection pipe array, an injection hood, and a drive unit. Several injection hoods are arranged along the length of a sintering trolley, each hood positioned directly above the sintering trolley. The gas pipe is located outside the injection hoods, and the injection pipe array is fixedly connected inside the injection hoods. The inlet end of the injection pipe array passes through the side wall of the injection hood and is detachably connected to the gas pipe. Several air jet holes are provided on the side of the injection pipe array facing the sintering trolley. A drive unit is located on the side of the sintering trolley, driving the injection hoods to tilt, so that the injection hoods are either away from or positioned directly above the sintering trolley.

[0009] In the technical solution of this invention, several spray nozzles are arranged along the length of the sintering trolley and cover the sintering trolley directly above it. A row of spray nozzles is fixed inside the spray nozzles and located above the sintering material layer, thereby spraying gas into the sintering material layer. One end of the spray nozzle row is detachably connected to a gas pipe located outside the spray nozzles. A drive device located on the side of the sintering trolley can drive the spray nozzles to rotate, moving them away from the top of the sintering trolley. During maintenance, the spray nozzle row covering the trolley can be disconnected from the gas pipe and, driven by the drive device, rotates to the side along with the spray nozzles, creating space for maintenance and facilitating the maintenance of the sintering trolley.

[0010] Preferably, the blow-off hood comprises a rectangular frame formed by two opposing end plates and two opposing side plates, and a cover plate that closes one end of the rectangular frame. A flexible sealing curtain is provided at the bottom of each end plate, and the flexible sealing curtain slides in contact with the material surface. A flexible sealing curtain is provided at the bottom of each side plate, and the flexible sealing curtain slides in contact with the sintering trolley side rails.

[0011] Specifically, the bottom of the side plate is higher than or flush with the top of the sintering trolley sideboard to avoid interference between the side plate of the blow-blowing hood and the sintering trolley sideboard when it is rotated. The end plate flexible sealing curtain and the side plate flexible sealing curtain are made of ceramic fiber cloth or fiberglass cloth coated with silicone rubber. Furthermore, the end plate flexible sealing curtain is detachably connected to the bottom of the end plate, and the side plate flexible sealing curtain is detachably connected to the bottom of the side plate to facilitate replacement of the flexible sealing curtain. In one embodiment, the flexible sealing curtain is connected to the bottom of the end plate and the bottom of the side plate using pressure plate bolts. Specifically, metal pressure plates are set at the bottom of the end plate and the bottom of the side plate, and high-temperature bolts are passed through the metal pressure plates, the flexible sealing curtain, and the end plate / side plate, and tightened with nuts to fix the flexible sealing curtain.

[0012] The flexible sealing curtain of the end plate hangs naturally over the material surface of the sintering trolley to compensate for the gap between the bottom of the end plate and the material surface. When the trolley moves forward, the material moves relative to the stationary blow-off hood, causing the end of the flexible sealing curtain to bend backward, forming a dragging curtain. To ensure effective sealing and compensate for curtain wear, the flexible sealing curtain of the end plate must be long enough so that after being dragged by the material surface, a section of the curtain still presses against the material surface. The length pressing against the material surface is preferably 50mm to 100mm.

[0013] To compensate for the gap between the bottom of the side plate and the sintering trolley side rail, the flexible sealing curtain of the side plate is inclined towards the trolley side rail and overlaps it, so that the flexible sealing curtain of the side plate is pressed against the inner side of the sintering trolley side rail with a certain pressure and slides in contact with the sintering trolley side rail. To further increase the pressure and improve the sealing performance, a certain amount of counterweight can be added to the bottom of the flexible sealing curtain of the side plate. At the same time, the bottom of the flexible sealing curtain of the side plate needs to maintain a safe distance (e.g., 20-50mm) from the material surface to prevent it from being hooked or torn by large pieces of material or debris on the material surface.

[0014] Preferably, the jet pipe array includes a main jet pipe, several branch jet pipes, and several tie rods. One end of each tie rod is fixedly connected to the inner wall of the jet hood, and the other end is fixedly connected to a branch jet pipe. The jet nozzles are located on the side of the branch jet pipes facing the sintering trolley. One end of each branch jet pipe is connected to one end of the main jet pipe, and the other end of the main jet pipe passes through the side wall of the jet hood and is detachably connected to the gas pipe.

[0015] Specifically, the injection branch pipes are fixed to the inner wall of the injection hood by tie rods. The injection branch pipes extend along the width of the sintering trolley, and the branch pipes within the same injection hood are parallel to each other and evenly spaced along the length of the sintering trolley. This ensures uniform distribution of the injection branch pipes, thereby ensuring uniform gas distribution on the surface of the sintering trolley and improving sintering quality. The jet nozzles are evenly spaced along the length of the injection branch pipes and are vertically downwards or inclined at 10°~15° towards the direction of travel of the sintering trolley. Detachable connections can be made using flange connections, quick-connect couplings, etc.

[0016] Preferably, the gas pipeline includes a main gas pipe and a plurality of gas branch pipes, each connected to the main gas pipe and corresponding to a specific main gas injection pipe. The gas branch pipes are connected to their corresponding main gas injection pipes via flanges.

[0017] The main gas pipe delivers gas to each injection main pipe via gas branch pipes. The injection main pipes then distribute the gas to the injection branch pipes, and the gas is injected into the material layer through jet nozzles. The gas branch pipes are connected to their corresponding injection main pipes via flanges for easy connection and disconnection. Specifically, a first flange is installed at the end of the gas branch pipe furthest from the main gas pipe, and a second flange is installed at the end of the injection main pipe extending beyond the injection hood. The first and second flanges are connected by bolts to allow the gas branch pipes to communicate with the injection main pipe.

[0018] Preferably, at least one of the main injection pipe and the gas branch pipe is a metal flexible hose.

[0019] This design compensates for installation errors, absorbs thermal expansion displacement, and prevents interference between the main blow pipe and the gas branch pipe when the blow hood is flipped to the side. In one embodiment, the gas branch pipe is a stainless steel flexible metal hose.

[0020] Preferably, a support platform is provided on the side of the sintering trolley, and the drive device is mounted on the support platform. The drive device includes a drive component and a transmission component. The drive component drives the transmission component to rotate, thereby driving the blown hood to tilt to the side of the sintering trolley.

[0021] Preferably, the driving component is a linear drive device. The linear drive device is one of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. The transmission component includes an L-shaped support rod. The fixed end of the linear drive device is rotatably connected to the support platform, and the movable end of the linear drive device is rotatably connected to the upper part of the L-shaped support rod. One end of the L-shaped support rod is rotatably connected to the support platform, and the other end of the L-shaped support rod is fixedly connected to the outer wall of the spray nozzle.

[0022] In one embodiment, the linear drive device is a hydraulic cylinder. The fixed end of the cylinder is connected to the support platform, and the movable end of the cylinder is connected to the L-shaped support rod via hinge supports and spherical bearings. The spherical bearings can adaptively swing at an angle to ensure that the cylinder always bears only axial push and pull forces, and not lateral bending moments that would cause bending and damage. The L-shaped support rod is connected to the support platform via hinge supports and self-aligning roller bearings. The self-aligning roller bearings can withstand both huge radial forces (the weight of the L-shaped support rod and the blower hood) and a certain axial force, and can automatically align themselves to compensate for minor installation errors. The drive process in this embodiment is as follows: The hydraulic cylinder retracts, causing the L-shaped support rod to rotate towards the side closer to the hydraulic cylinder, and causing the blower hood to rotate synchronously with the L-shaped support rod. The blower hood opens, exposing the sintering trolley platform for easy maintenance. The hydraulic cylinder extends, causing the L-shaped support rod to rotate away from the hydraulic cylinder, and causing the blower hood to rotate synchronously with the L-shaped support rod. The blower hood returns to its original position directly above the sintering trolley, thereby performing gas injection.

[0023] Preferably, the transmission component further includes a reinforcing rod and a mounting base. The L-shaped load-bearing rod includes a first segment and a second segment perpendicular to each other, with both ends of the reinforcing rod fixedly connected to the first segment and the second segment, respectively. The movable end of the linear drive device is rotatably connected to the connection point of the first segment and the second segment. The mounting base includes an integrally formed connecting part and a mounting part. The connecting part is fixedly connected to one end of the L-shaped load-bearing rod, and the mounting part is fitted and fixed to the outer wall of the spray nozzle.

[0024] The reinforcing rod is used to enhance the bending, torsional, and overall stiffness of the L-shaped load-bearing rod, preventing deformation and instability. The rotatable connection between the movable end of the linear drive device and the joint between the first and second rod segments helps save driving force, and the joint between the first and second rod segments has relatively higher strength, which helps ensure structural stability. Specifically, the angle between the reinforcing rod and the horizontal plane is 30°~60°, preferably 45°.

[0025] The mounting base is used to distribute the load transmitted from the L-shaped load-bearing rod to the blow hood, increasing the stress-bearing area of ​​the blow hood, reducing the pressure in the stress area, preventing deformation of the stress area, and improving structural stability. Specifically, the connecting part is provided with a slot for inserting one end of the L-shaped load-bearing rod. The cross-sectional shape of the slot is consistent with the cross-sectional shape of the L-shaped load-bearing rod (such as circular, square, I-shaped, etc.). After the L-shaped load-bearing rod is inserted into the slot, it is fastened by connectors (such as bolts, pins, etc.). The mounting part (such as a flange) is bolted to the side wall of the blow hood, and the contact area between the mounting part and the blow hood is 3 to 8 times the cross-sectional area of ​​the L-shaped load-bearing rod.

[0026] When the blowing hood is placed directly above the sintering trolley for blowing operations, the first rod segment is in a vertical position and perpendicular to the platform surface of the support table, while the second rod segment is in a horizontal position and perpendicular to the side wall of the blowing hood.

[0027] Preferably, the blow nozzles correspond one-to-one with the driving devices, and the driving devices drive the corresponding blow nozzles to rotate. Alternatively, the blow nozzles are symmetrically divided into a first cover and a second cover along the longitudinal center plane, and the first cover and the second cover are respectively equipped with the corresponding driving devices, so that the first cover and the second cover can rotate respectively.

[0028] To adapt to different working conditions, the blow-off hood can be a single, integral hood or a separate hood consisting of a first hood body and a second hood body. When the sintering trolley is narrow, an integral hood is typically used. When the sintering trolley is wide, a separate hood is typically used. The first and second hood bodies can be joined together to form a single unit, or they can be opened separately to the side without interfering with each other. Specifically, the mating surfaces of the first and second hood bodies are equipped with a flexible sealing material, such as ceramic fiber cloth. When the first and second hood bodies are joined, the flexible sealing material deforms to prevent movement interference between the first and second hood bodies, while also enhancing the sealing performance of the separate hood body. Alternatively, the first and second covers can be connected by overlapping. Specifically, the first cover has a first overlapping part at the end near the second cover, and the second cover has a second overlapping part at the end near the first cover. Both the first and second overlapping parts are inverted U-shaped, and the first overlapping part overlaps the outside of the second overlapping part. When it needs to be opened, the first cover is opened first, and then the second cover is opened. When it needs to be closed, the second cover is closed first, and then the first cover is closed, thereby avoiding movement interference between the first and second covers.

[0029] Preferably, the blowing nozzles are spaced apart by a preset distance, which is 10mm to 60mm, more preferably 30mm to 40mm. This avoids excessive spacing between the blowing nozzles, which could affect the sintering quality, and also prevents the blowing nozzles from interfering with each other during the flipping process. In one embodiment, the blowing nozzles are spaced apart by 30mm.

[0030] The maintenance process of the sintering trolley of the present invention is as follows: First, shut down the sintering trolley system and stop the gas supply. Disconnect the gas branch pipe and the main injection pipe. Then, drive the injection hood to rotate to the side of the sintering trolley by the drive device, so that the injection hood and injection pipe are removed from the top of the sintering trolley. Then the sintering trolley can be maintained.

[0031] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0032] The flip-type gas injection device of the present invention is provided with a spray hood that can be flipped to the side and a spray pipe row fixed inside the spray hood and detachably connected to the gas pipe. This allows the spray pipe row to be disconnected from the gas pipe and flipped together with the spray hood, thereby removing the obstruction above the sintering trolley, making room for maintenance and facilitating the maintenance of the sintering trolley. Attached Figure Description

[0033] Figure 1 This is a top view of the first embodiment of the flip-type gas injection device of the present invention.

[0034] Figure 2 This is a schematic diagram showing the connection between the jet pipe array and the jet hood in the first embodiment of the flip-type gas jet device of the present invention.

[0035] Figure 3 This is a schematic diagram showing the connection between the drive device and the spray hood in the first embodiment of the flip-type gas injection device of the present invention.

[0036] Figure 4 This is a schematic diagram of the flipping of the blow hood in the first embodiment of the flipping gas injection device of the present invention.

[0037] Figure 5 This is a top view of a second embodiment of the flip-type gas injection device of the present invention.

[0038] Figure 6 This is a schematic diagram showing the connection between the jet pipe array and the jet hood in a second embodiment of the flip-type gas jet device of the present invention.

[0039] Reference numerals in the attached drawings: 1: Gas main pipe; 2: Gas branch pipe; 3: Injection pipe array; 301: Injection main pipe; 302: Injection branch pipe; 4: Injection hood; 5: Support platform; 6: Drive device; 601: Linear drive device; 602: L-shaped support bar; 603: Reinforcing bar; 7: Mounting seat; 8: Tie bar; 9: First flange; 10: Second flange. Detailed Implementation

[0040] The technical solution of the present invention will be illustrated below with examples. The scope of protection sought by the present invention includes, but is not limited to, the following embodiments.

[0041] Please refer to Figures 1 to 6A tilting gas injection device includes a gas pipe, an injection pipe array 3, an injection hood 4, and a drive device 6. Several injection hoods 4 are arranged along the length of the sintering trolley, each covering the top of the sintering trolley. The gas pipe is located outside the injection hoods 4, and the injection pipe array 3 is fixedly connected inside the injection hoods 4. The air inlet end of the injection pipe array 3 passes through the side wall of the injection hood 4 and is detachably connected to the gas pipe. Several air jet holes are opened on the side of the injection pipe array 3 facing the sintering trolley. The drive device 6 is located on the side of the sintering trolley, and the drive device 6 drives the injection hoods 4 to tilt, so that the injection hoods 4 are either away from or covering the top of the sintering trolley.

[0042] Preferably, the blow-off hood 4 includes a rectangular frame formed by two opposing end plates and two opposing side plates, and a cover plate that closes one end of the rectangular frame. A flexible sealing curtain is provided at the bottom of each end plate, and the flexible sealing curtain slides in contact with the material surface. A flexible sealing curtain is provided at the bottom of each side plate, and the flexible sealing curtain slides in contact with the sintering trolley side rails.

[0043] Preferably, the jet pipe array 3 includes a main jet pipe 301, a plurality of jet branch pipes 302, and a plurality of tie rods 8. One end of each tie rod 8 is fixedly connected to the inner wall of the jet hood 4, and the other end is fixedly connected to the jet branch pipe 302. The jet nozzles are located on the side of the jet branch pipe 302 facing the sintering trolley. One end of each jet branch pipe 302 is connected to one end of the main jet pipe 301, and the other end of the main jet pipe 301 passes through the side wall of the jet hood 4 and is detachably connected to the gas pipe.

[0044] Preferably, the gas pipeline includes a main gas pipe 1 and a plurality of branch gas pipes 2, each connected to the main gas pipe 1 and corresponding to the main injection pipe 301. The branch gas pipes 2 are connected to the corresponding main injection pipes 301 via flanges.

[0045] Preferably, at least one of the main injection pipe 301 and the gas branch pipe 2 is a metal flexible hose.

[0046] Preferably, a support platform 5 is provided on the side of the sintering trolley, and the drive device 6 is mounted on the support platform 5. The drive device 6 includes a drive component and a transmission component. The drive component drives the transmission component to rotate, thereby driving the blown hood 4 to tilt to the side of the sintering trolley.

[0047] Preferably, the driving component is a linear drive device 601. The linear drive device 601 is one of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. The transmission component includes an L-shaped support rod 602. The fixed end of the linear drive device 601 is rotatably connected to the support platform 5, and the movable end of the linear drive device 601 is rotatably connected to the upper part of the L-shaped support rod 602. One end of the L-shaped support rod 602 is rotatably connected to the support platform 5, and the other end of the L-shaped support rod 602 is fixedly connected to the outer wall of the spray nozzle 4.

[0048] Preferably, the transmission component further includes a reinforcing rod 603 and a mounting base 7. The L-shaped load-bearing rod 602 includes a first rod segment and a second rod segment that are perpendicular to each other, and the two ends of the reinforcing rod 603 are respectively fixedly connected to the first rod segment and the second rod segment. The movable end of the linear drive device 601 is rotatably connected to the connection point of the first rod segment and the second rod segment. The mounting base 7 includes an integrally formed connecting part and a mounting part. The connecting part is fixedly connected to one end of the L-shaped load-bearing rod 602, and the mounting part is fitted and fixed to the outer wall of the spray nozzle 4.

[0049] Preferably, the blow-off hood 4 corresponds one-to-one with the driving device 6, and the driving device 6 drives the corresponding blow-off hood 4 to rotate. Alternatively, the blow-off hood 4 is symmetrically divided into a first hood and a second hood along its longitudinal center plane, and the first hood and the second hood are respectively equipped with the corresponding driving device 6, so that the first hood and the second hood can rotate respectively.

[0050] Preferably, each of the blow nozzles 4 is spaced apart by a preset distance, the preset distance being 10mm to 60mm, more preferably 30mm to 40mm.

[0051] Example 1

[0052] like Figure 1-4 As shown, a tilting gas injection device includes a gas pipe, an injection pipe array 3, an injection hood 4, and a drive device 6. Six injection hoods 4 are arranged along the length of the sintering trolley, each covering the top of the sintering trolley. The gas pipe is located outside the injection hood 4, and the injection pipe array 3 is fixedly connected inside the injection hood 4. The air inlet end of the injection pipe array 3 passes through the side wall of the injection hood 4 and is detachably connected to the gas pipe. Several air jet holes are opened on the side of the injection pipe array 3 facing the sintering trolley. The drive device 6 is located on the side of the sintering trolley, and drives the injection hood 4 to tilt, so that the injection hood 4 is either away from or positioned directly above the sintering trolley.

[0053] Example 2

[0054] The embodiment 1 is repeated, except that the blow-off hood 4 includes a rectangular frame formed by two opposing end plates and two opposing side plates, and a cover plate that closes one end of the rectangular frame. A flexible sealing curtain is provided at the bottom of each end plate, and this flexible sealing curtain slides in contact with the material surface. A flexible sealing curtain is provided at the bottom of each side plate, and this flexible sealing curtain slides in contact with the sintering trolley side rails.

[0055] Both the end plate flexible sealing curtain and the side plate flexible sealing curtain are made of ceramic fiber cloth.

[0056] Example 3

[0057] The embodiment 2 is repeated, except that the jet pipe array 3 includes a main jet pipe 301, four jet branch pipes 302, and several tie rods 8. One end of each tie rod 8 is fixedly connected to the inner wall of the jet hood 4, and the other end is fixedly connected to the jet branch pipe 302. The jet nozzles are located on the side of the jet branch pipe 302 facing the sintering trolley. One end of each jet branch pipe 302 is connected to one end of the main jet pipe 301, and the other end of the main jet pipe 301 passes through the side wall of the jet hood 4 and is detachably connected to the gas pipe.

[0058] Example 4

[0059] The embodiment 3 is repeated, except that the gas pipeline includes a main gas pipe 1 and six branch gas pipes 2, each connected to the main gas pipe 1 and corresponding one-to-one with the main injection pipe 301. The branch gas pipes 2 are connected to the corresponding main injection pipes 301 via flanges.

[0060] The gas branch pipe 2 is provided with a first flange 9 at the end away from the gas main pipe 1, and the blow pipe 301 is provided with a second flange 10 at the end extending out of the blow hood 4. The first flange 9 and the second flange 10 are connected by bolts.

[0061] Example 5

[0062] Repeat Example 4, except that the gas branch pipe 2 is a stainless steel metal flexible hose.

[0063] Example 6

[0064] The embodiment 5 is repeated, except that a support platform 5 is provided on the side of the sintering trolley, and the driving device 6 is mounted on the support platform 5. The driving device 6 includes a driving component and a transmission component. The driving component drives the transmission component to rotate, thereby driving the blown hood 4 to flip to the side of the sintering trolley.

[0065] Example 7

[0066] The same principle applies to Embodiment 6, except that the driving component is a linear drive device 601. The linear drive device 601 is a hydraulic cylinder. The transmission component includes an L-shaped support rod 602. The fixed end of the hydraulic cylinder is rotatably connected to the support platform 5, and the movable end of the hydraulic cylinder is rotatably connected to the upper part of the L-shaped support rod 602. One end of the L-shaped support rod 602 is rotatably connected to the support platform 5, and the other end of the L-shaped support rod 602 is fixedly connected to the outer wall of the spray nozzle 4.

[0067] Example 8

[0068] The embodiment 7 is repeated, except that the transmission component further includes a reinforcing rod 603 and a mounting base 7. The L-shaped load-bearing rod 602 includes a first rod segment and a second rod segment that are perpendicular to each other, and the two ends of the reinforcing rod 603 are respectively fixedly connected to the first rod segment and the second rod segment. The movable end of the linear drive device 601 is rotatably connected to the connection point of the first rod segment and the second rod segment. The mounting base 7 includes an integrally formed connecting part and a mounting part. The connecting part is fixedly connected to one end of the L-shaped load-bearing rod 602, and the mounting part is fitted and fixed to the outer wall of the spray nozzle 4.

[0069] The reinforcing rod 603 has an angle of 45° with the horizontal plane. The connecting part is a sleeve, and the L-shaped load-bearing rod is inserted into the sleeve and fastened by a pin. The mounting part is a flange integrally formed with the sleeve and coaxially connected, which is bolted to the side wall of the blow hood. The contact area between the flange and the blow hood is 5 times the cross-sectional area of ​​the L-shaped load-bearing rod.

[0070] Example 9

[0071] Repeat Example 8, except that the blow nozzle 4 corresponds one-to-one with the driving device 6, and the driving device 6 drives the corresponding blow nozzle 4 to flip.

[0072] Example 10

[0073] Example 9 is repeated, except that each of the spray nozzles 4 is spaced apart by a preset distance of 30mm.

Claims

1. A tilting gas injection device, characterized in that: It includes a gas pipe, a jet pipe array (3), a jet hood (4), and a drive device (6); several jet hoods (4) are arranged along the length of the sintering trolley, and the jet hoods (4) are all positioned directly above the sintering trolley; the gas pipe is located outside the jet hood (4), the jet pipe array (3) is fixedly connected inside the jet hood (4), and the air inlet end of the jet pipe array (3) passes through the side wall of the jet hood (4) and is detachably connected to the gas pipe; several jet holes are opened on the side of the jet pipe array (3) facing the sintering trolley; a drive device (6) is arranged on the side of the sintering trolley, and the drive device (6) drives the jet hood (4) to rotate so that the jet hood (4) leaves or is positioned directly above the sintering trolley.

2. The tilting gas injection device according to claim 1, characterized in that: The blow-off hood (4) includes a rectangular frame formed by two end plates facing each other and two side plates facing each other, and a cover plate that closes one end of the rectangular frame; the bottom of the end plate is provided with a flexible sealing curtain, which slides in contact with the material surface; the bottom of the side plate is provided with a flexible sealing curtain, which slides in contact with the sintering trolley railing.

3. The tilting gas injection device according to any one of claims 1 to 2, characterized in that: The jet pipe array (3) includes a jet main pipe (301), several jet branch pipes (302) and several tie rods (8); one end of the tie rod (8) is fixedly connected to the inner wall of the jet hood (4), and the other end is fixedly connected to the jet branch pipe (302); the jet hole is opened on the side of the jet branch pipe (302) facing the sintering trolley; one end of each jet branch pipe (302) is connected to one end of the jet main pipe (301), and the other end of the jet main pipe (301) passes through the side wall of the jet hood (4) and is detachably connected to the gas pipe.

4. The tilting gas injection device according to claim 3, characterized in that: The gas pipe includes a main gas pipe (1) and several branch gas pipes (2) that are respectively connected to the main gas pipe (1) and correspond one-to-one with the main injection pipe (301); the branch gas pipes (2) are connected to the corresponding main injection pipe (301) by flanges.

5. The tilting gas injection device according to claim 4, characterized in that: At least one of the main injection pipe (301) and the gas branch pipe (2) is a metal hose.

6. The tilting gas injection device according to any one of claims 1 to 5, characterized in that: A support platform (5) is provided on the side of the sintering trolley, and the driving device (6) is provided on the support platform (5); the driving device (6) includes a driving component and a transmission component; the driving component drives the transmission component to rotate, thereby driving the blown hood (4) to flip to the side of the sintering trolley.

7. The tilting gas injection device according to claim 6, characterized in that: The driving component is a linear drive device (601); the linear drive device (601) is one of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder; the transmission component includes an L-shaped support rod (602); the fixed end of the linear drive device (601) is rotatably connected to the support platform (5), and the movable end of the linear drive device (601) is rotatably connected to the upper part of the L-shaped support rod (602); one end of the L-shaped support rod (602) is rotatably connected to the support platform (5), and the other end of the L-shaped support rod (602) is fixedly connected to the outer wall of the spray nozzle (4).

8. The tilting gas injection device according to claim 7, characterized in that: The transmission component also includes a reinforcing rod (603) and a mounting base (7); the L-shaped support rod (602) includes a first rod segment and a second rod segment that are perpendicular to each other, and the two ends of the reinforcing rod (603) are respectively fixedly connected to the first rod segment and the second rod segment; the movable end of the linear drive device (601) is rotatably connected to the connection between the first rod segment and the second rod segment; the mounting base (7) includes an integrally formed connecting part and a mounting part; the connecting part is fixedly connected to one end of the L-shaped support rod (602), and the mounting part is fitted and fixed to the outer wall of the spray nozzle (4).

9. The tilting gas injection device according to any one of claims 1 to 8, characterized in that: The blow nozzle (4) corresponds one-to-one with the drive device (6), and the drive device (6) drives the corresponding blow nozzle (4) to flip. Alternatively, the blow-out hood (4) is symmetrically divided into a first hood and a second hood along the longitudinal center plane. The first hood and the second hood are respectively equipped with the corresponding drive device (6), so that the first hood and the second hood can be flipped respectively.

10. The tilting gas injection device according to any one of claims 1 to 9, characterized in that: The spray nozzles (4) are spaced at a preset distance, which is 10mm to 60mm, preferably 30mm to 40mm.

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