A steel ingot waste heat recovery device

Abstract

The utility model provides a kind of ingot waste heat recovery device, including being provided with first guide rail on ground, two U-shaped sliding blocks are sleeved on the first guide rail, the U-shaped sliding block upper surface is provided with support rod, the support rod is connected with the suction hopper corresponding to the steel ingot medium frequency furnace gas outlet, the suction hopper is provided with the moving piece for driving the suction hopper moves;The utility model can realize improving waste heat recovery efficiency and adapting different station changes of steel ingot.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology in the iron and steel metallurgy industry, and in particular to a waste heat recovery device for steel ingots. Background Technology

[0002] In the steel metallurgy industry, ingot casting is an indispensable and crucial process. Typically, after molten steel is smelted in an induction furnace, it is poured into ingot molds to form ingots. During this process, the steel ingots, fresh from the high-temperature furnace, carry a large amount of heat, and their surface temperature is extremely high. Simultaneously, the ingot mold itself absorbs and stores a significant amount of heat. This heat, dissipated into the workshop environment through radiation and convection, not only creates a harsh working environment and poses safety hazards but also leads to serious energy waste.

[0003] Currently, the industry is increasingly emphasizing the recovery and utilization of waste heat from steel ingots and ingot molds. Common waste heat recovery methods include installing gas collection hoods at fixed workstations and guiding high-temperature flue gas through pipelines to waste heat boilers or heat exchangers for energy recovery. However, this method has significant limitations: fixed gas collection hoods cannot effectively track and adapt to changes in the steel ingot at different workstations such as demolding, transfer, and resting. When the steel ingot is lifted out of the effective coverage area of ​​the gas collection hood, the waste heat it emits cannot be collected, resulting in low recovery efficiency. The location of the flue gas vent of the induction furnace or the steel ingot itself is not completely fixed, and fixed suction devices cannot guarantee that they are always optimally aligned with the heat source. In the space-constrained foundry workshop, large fixed pipelines and gas collection hoods may interfere with the running trajectory of bridge cranes, affecting production efficiency and safety. In addition, existing mobile gas collection devices are often complex in structure, inconvenient to move, or have inaccurate positioning, making it difficult to operate stably and reliably under the harsh conditions of high temperature and high dust in steel enterprises. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide a waste heat recovery device for steel ingots that can improve waste heat recovery efficiency and adapt to changes in different work positions of steel ingots.

[0005] This utility model is implemented by the following method: a waste heat recovery device for steel ingots, including a first guide rail set on the ground, two U-shaped sliders sleeved on the first guide rail, a support rod set on the upper surface of the U-shaped sliders, an air suction bucket connected to the support rod corresponding to the gas outlet of the medium frequency furnace of the steel ingot, and a moving part set on the air suction bucket for driving the air suction bucket to move.

[0006] Furthermore, an air intake pipe is connected to the upper surface of the air intake hopper.

[0007] Furthermore, the movable component includes a second guide rail, which is installed on the ceiling. A rack is installed on the upper surface of the second guide rail. A U-shaped support rod is installed at the front end of the upper surface of the suction hopper. A support block is installed in the middle of the front surface of the cross plate of the U-shaped support rod. An opening is provided on the support block. Fixing blocks are installed at both the front and rear ends of the upper surface of the support block. A drive motor is installed on the front fixing block. The output shaft of the drive motor is connected to a gear that meshes with the rack.

[0008] The beneficial effects of this utility model are as follows: This utility model achieves lateral movement by cooperating with the first guide rail and the U-shaped slider, and drives the suction bucket to move longitudinally along the second guide rail by the moving part, so that the suction bucket accurately tracks the position change of the steel ingot, effectively covers the heat source of different work positions, and has the advantages of improving the waste heat recovery efficiency and adapting to the changes of different work positions of the steel ingot. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the present invention in its first state.

[0010] Figure 2 This is a structural schematic diagram of the second state of this utility model. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] Please see Figure 1 and Figure 2 As shown, this utility model provides an embodiment: a waste heat recovery device for steel ingots, including a first guide rail 1 set on the ground, two U-shaped sliders 2 sleeved on the first guide rail 1, a support rod 3 set on the upper surface of the U-shaped sliders 2, an air suction bucket 4 corresponding to the gas outlet of the medium frequency furnace of the steel ingot connected to the support rod 3, and a moving part 5 for driving the air suction bucket 4 to move.

[0013] The first guide rail refers to a straight track laid along the steel ingot transfer path, which can be implemented using I-beam steel rails, providing a horizontal base for the suction device. The U-shaped slider is a sliding component with an open slot, which can be implemented using a casting with rollers, allowing it to slide along the guide rail and bear the load of the supporting structure. The support rod is a vertical support structure connecting the slider and the suction hopper, which can be implemented using a hydraulic lifting rod, used to adjust the height of the suction hopper. The suction hopper is a gas collecting component with a funnel-shaped opening, which can be welded from a high-temperature resistant alloy, with the opening direction corresponding to the gas outlet of the medium-frequency furnace. The moving component is the actuator that drives the spatial movement of the suction hopper, which can be implemented using a gear and rack transmission system, used to precisely control the position of the suction hopper.

[0014] Specifically, the first guide rail is laid along the steel ingot transfer route, and two U-shaped sliders are respectively fitted onto both ends of the guide rail. Support rods are vertically installed on top of the sliders, and the height of the support rods is adjusted to align the suction bucket opening with the air outlet at different heights. When the steel ingot is transferred to a new workstation, the sliders move along the guide rail, causing the suction bucket to shift horizontally. The moving parts drive the suction bucket through a gear and rack transmission for fine-tuning and positioning, ensuring that the air collection port is always directly facing the heat source. This structure allows the suction device to follow the position changes of the steel ingot while avoiding interference with overhead hoisting equipment.

[0015] Compared to existing technologies, fixed gas collection hoods require individual collection devices for each workstation, while this solution achieves workstation coverage for a single device through a movable guide rail system. Traditional devices require frequent start-stop operation of the fan to adapt to intermittent work, while this solution achieves continuous gas collection by continuously tracking the location of the heat source. Existing mobile devices mostly use a suspended structure, which is prone to collisions with overhead cranes, while this solution places the mobile mechanism on ground tracks, effectively avoiding the operating space of overhead equipment.

[0016] Through the above technical solution, this application achieves dynamic position adjustment of the steel ingot waste heat collection device, solving the problem of insufficient coverage of fixed devices. It can effectively track the spatial position changes of steel ingots at different workstations, improving the continuity of waste heat recovery. The ground track layout avoids spatial conflicts with overhead crane operations, ensuring production safety. The adjustable support structure adapts to the height differences of gas outlets in different furnaces, improving the device's versatility.

[0017] Please continue reading. Figure 1 and Figure 2 As shown in one embodiment of the present invention, an air suction pipe 41 is connected to the upper surface of the air suction bucket 4.

[0018] The suction pipe refers to the pipeline used to transport the high-temperature flue gas collected by the suction hopper to the waste heat treatment equipment. It can be implemented using a high-temperature resistant metal flexible hose or corrugated pipe, whose flexible connection characteristics can adapt to the movement requirements of the suction hopper while maintaining the pipeline's airtightness. The suction hopper is the structure used to align with the gas outlet of the steel ingot induction furnace and collect the high-temperature flue gas. It can adopt a funnel-shaped opening design to expand the flue gas coverage area, and its material can be high-temperature resistant alloy steel to withstand high-temperature environments.

[0019] Specifically, the suction pipe is directly fixed to the upper surface of the suction hopper via flanges or clamps, communicating with the internal cavity of the suction hopper. When the steel ingot is removed from the induction furnace, the suction hopper is repositioned via a moving component to align with the outlet. High-temperature flue gas is drawn into the suction hopper and then transported to the waste heat boiler or heat exchanger via the suction pipe. The flexible connection of the suction pipe allows the suction hopper to move freely on the guide rails without relying on fixed pipes, thus preventing flue gas escape due to changes in the position of the steel ingot.

[0020] Compared to existing technologies, fixed gas collection hoods require rigid pipe connections to the processing equipment, limiting their mobility. This solution, however, utilizes a flexible connection design for the suction pipe, allowing the suction hopper to move flexibly along the steel ingot transfer path, covering different workstations such as demolding and settling areas. Simultaneously, the independent arrangement of the suction pipe reduces the space occupied by the overhead crane in the workshop and avoids interference with hoisting equipment.

[0021] Through the above technical solution, this application solves the problem of low waste heat recovery efficiency caused by the limited mobility of fixed gas collection devices. By the synergistic effect of the suction pipe and the mobile suction bucket, it ensures that the waste heat emitted by the steel ingot at different work positions can be effectively collected, while simplifying the pipeline layout and improving the system reliability.

[0022] Please continue reading. Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the movable component 5 includes a second guide rail 51, which is provided on the ceiling. A rack 52 is provided on the upper surface of the second guide rail 51. A U-shaped support rod 53 is provided at the front end of the upper surface of the suction hopper 4. A support block 54 is provided in the middle of the front surface of the cross plate of the U-shaped support rod 53. An opening 55 is provided on the support block 54. Fixing blocks 56 are provided at both the front and rear ends of the upper surface of the support block 54. A drive motor 57 is provided on the front fixing block 56. The output shaft of the drive motor 57 is connected to a gear 58 that meshes with the rack 52.

[0023] The second guide rail refers to the track structure installed on the ceiling. Specifically, it can use I-beams or H-beams as the track base and be fixed to the concrete top surface with expansion bolts to provide a planar movement path for the moving parts.

[0024] Among them, the rack refers to the strip-shaped transmission component laid along the length of the second guide rail. Specifically, it can be an alloy steel rack with a module of 8, which is rigidly connected to the second guide rail by countersunk bolts to form a meshing transmission relationship with the gear.

[0025] Among them, the U-shaped support rod refers to a frame structure with vertical columns and horizontal plates. Specifically, it can be formed by welding 20mm thick steel plates. The lower end of the vertical column is connected to the suction bucket through a flange, which is used to form a rigid support between the drive mechanism and the suction bucket.

[0026] Among them, the support block refers to the load-bearing component set in the middle of the horizontal plate. It can be made of cast steel and the opening inside is used to accommodate the meshing space of the gear and rack. The fixing blocks on both sides are connected to the support block by welding to form a stable support structure.

[0027] Among them, the drive motor refers to the device that provides rotational power. Specifically, it can be a geared motor with an IP55 protection rating. The output shaft is coaxially connected to the gear through a keyway and is used to drive the gear to move linearly along the rack.

[0028] Specifically, when the drive motor starts, the output shaft drives the gear to rotate. The gear meshes with the rack fixed on the second guide rail, causing the entire U-shaped support rod to move along the length of the second guide rail. Since the lower end of the U-shaped support rod is rigidly connected to the suction hopper, the suction hopper moves synchronously with the support rod. The opening inside the support block provides space for the gear and rack to mesh, and the fixed blocks on both sides provide axial constraint on the drive motor, preventing the gear from disengaging from the rack. This structure achieves two-dimensional movement in the horizontal plane via the second guide rail mounted on the ceiling, avoiding interference with ground-based equipment.

[0029] Compared to existing technologies, traditional mobile gas collection devices often use ground tracks with hydraulic push rods for drive, which suffers from problems such as track jamming due to dust accumulation and difficulties in maintaining the hydraulic system. This solution eliminates interference from ground obstacles by using ceiling tracks and rack and pinion transmission. The rack and pinion transmission features high positioning accuracy and strong dust resistance, while the direct drive method with a geared motor simplifies the transmission chain structure.

[0030] Through the above technical solution, this application achieves precise positioning and smooth movement of the suction hopper in the workshop space, ensuring that the air collection port is always aligned with the heat source of the steel ingot, thus solving the problem of insufficient coverage of the fixed air collection hood; at the same time, the aerial track layout avoids interference with the overhead crane's running trajectory, ensuring the safety of production operations.

[0031] The drive motor used in this invention is existing technology, which is already well understood by those skilled in the art, and will not be described in detail here.

[0032] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A waste heat recovery device for steel ingots, characterized in that: The system includes a first guide rail on the ground, two U-shaped sliders mounted on the first guide rail, a support rod on the upper surface of the U-shaped sliders, a suction bucket connected to the support rod corresponding to the gas outlet of the ingot induction furnace, and a moving part on the suction bucket for moving the suction bucket.

2. The waste heat recovery device for steel ingots according to claim 1, characterized in that: The upper surface of the air intake is connected to an air intake pipe.

3. The waste heat recovery device for steel ingots according to claim 1, characterized in that: The movable component includes a second guide rail, which is installed on the ceiling. A rack is installed on the upper surface of the second guide rail. A U-shaped support rod is installed at the front end of the upper surface of the suction hopper. A support block is installed in the middle of the front surface of the cross plate of the U-shaped support rod. An opening is provided on the support block. Fixing blocks are installed at both the front and rear ends of the upper surface of the support block. A drive motor is installed on the front fixing block. The output shaft of the drive motor is connected to a gear that meshes with the rack.

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