Self-closing feeding structure for smelting furnace

Abstract

The utility model provides a smelting furnace self -closing type feeding structure, including equipment body, the inside installation of equipment body has the mounting seat, the inside movable mounting of bearing seat has transmission shaft between two mounting seat, is connected with the closing plate between transmission shaft, the surface of closing plate top is inlayed and is installed wireless pressure sensor, the top surface mounting of equipment body has electric jack. The utility model discloses a mounting seat, transmission shaft, closing plate, wireless pressure sensor, electric jack rod and push rod are established in equipment body inside, cooperate and feed assembly, realized the automation and closed control of feeding process. Wireless pressure sensor can real -time perception closing plate stress condition, and electric jack rod can drive push rod accurate adjustment closing plate state, effectively reduce the gap between feeding channel and smelting furnace furnace mouth, avoid high -temperature flue gas, dust overflow pollution environment, reduce heat loss, prevent external cold air from entering, guarantee smelting quality and energy -conserving efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to smelting furnace feeding technology field especially smelting furnace self -closing type feeding structure. BACKGROUND

[0002] Smelting furnace is the core equipment of metallurgy, foundry and the like, and the feeding system as the key matching device of the smelting furnace directly influences smelting efficiency, material utilization rate and production safety. At present, the existing smelting furnace feeding structure mostly adopts open or semi-open design, and the following technical defects exist: There is lack of effective sealing structure between the feeding channel and the smelting furnace mouth, and the high-temperature flue gas and dust generated in the smelting process are easy to overflow from the gap, which not only pollutes the working environment, but also causes heat loss and increases energy consumption. At the same time, external cold air is easy to enter the furnace, which destroys the high-temperature atmosphere in the furnace and affects the smelting quality.

[0003] Therefore, it is necessary to provide the smelting furnace self -closing type feeding structure to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides smelting furnace self -closing type feeding structure, and the problem in the background art is solved.

[0005] In order to solve the above technical problems, the smelting furnace self -closing type feeding structure provided by the utility model, the equipment body is as a whole installation base, the inside fixed mounting has the mounting seat, the inside of mounting seat is connected with transmission shaft through bearing seat and forms the activity, and two transmission shafts are transversely spaced distribution and are fixedly connected between the closed plate, and this connection mode makes the closed plate flexible rotation around the transmission shaft, and then realizes the opening and closing of the feeding channel. The wireless pressure sensor is embedded and fixedly installed on the top surface of the closed plate, and the sensor is electrically connected with the controller outside the equipment body, which can detect various forces acting on the closed plate in real time and transmit signals. The electric jack is fixedly installed on the position above the closed plate on the top surface of the equipment body, the output end of the electric jack penetrates the top surface of the equipment body vertically downward, and the end is fixed with the top end of the push rod. The bottom end of the push rod is towards the top of the closed plate. When the electric jack extends, the push rod will push down and act on the top of the closed plate, forcing the closed plate to rotate around the transmission shaft and open the channel. When the electric jack retracts, the push rod is separated from the closed plate, which creates conditions for the reset of the closed plate. The feeding assembly is installed in the channel area between the feeding hopper and the closed plate inside the equipment body. When the feeding assembly conveys the material, the material can contact the closed plate to assist in keeping the channel open. At the same time, the opening and closing of the closed plate directly controls the on-off of the feeding channel. The wireless pressure sensor can also transmit the detected force signal of the closed plate to the controller. The controller adjusts the thrust of the electric jack according to the signal to avoid material blockage or sealing failure caused by improper opening degree of the channel.

[0006] Preferably, the device body is transversely installed with a discharge hopper near one end of the smelting furnace mouth, the inner wall of the discharge hopper is fixed with one end of the supporting spring on both sides, and the other end of the supporting spring is fixedly connected with the bottom end surface of the sealing plate. When the supporting spring is in a natural state, a pulling force is generated to pull the sealing plate to keep it closed, realizing the initial sealing of the channel. When the electric top rod is retracted and the push rod loses the pressure on the sealing plate, the supporting spring relies on its own elastic force to further pull the bottom end of the sealing plate, so that the sealing plate rotates in the opposite direction around the transmission shaft to reset, completing the self-closing of the channel. The reverse pulling force generated by the supporting spring can buffer the opening speed of the sealing plate to avoid violent collision with other parts. At the same time, when the sealing plate is closed, the pulling force of the supporting spring can also ensure that the sealing plate closely fits the edge of the channel, enhancing the sealing effect.

[0007] Preferably, the two conveying rollers inside the feeding assembly are transversely and parallelly installed inside the device body, and are drivingly connected through the annular conveying belt. The driving motor is fixedly installed outside the device body, and the output shaft thereof is connected with the end of one of the conveying rollers through a shaft coupling or a transmission belt. When the driving motor is started, it drives the conveying roller connected therewith to rotate, which in turn drives the other conveying roller to rotate synchronously through the friction of the conveying belt, so that the conveying belt forms a circulating motion, thereby realizing the conveying of the material from the feeding hopper to the discharge hopper. Moreover, the conveying speed of the conveying belt can be controlled by the driving motor, which can be coordinated with the opening and closing rhythm of the sealing plate to ensure that the material enters the smelting furnace stably and orderly, avoiding the accumulation or interruption of the material conveying.

[0008] Preferably, the two supporting springs are symmetrically installed on the left and right sides of the bottom end surface of the sealing plate, one end of each of the two supporting springs is fixed to the corresponding position of the inner wall of the discharge hopper, and the other end is fixed to the edge of the bottom end of the sealing plate, forming a symmetric force receiving structure. This symmetric distribution can provide balanced resetting force for the sealing plate, avoiding the inclination or jamming of the sealing plate due to uneven force on both sides, ensuring that the sealing plate remains stable during opening and closing. At the same time, when the sealing plate is closed, the symmetric force can make the sealing plate uniformly fit the edge of the channel, further enhancing the sealing stability and preventing the leakage of high-temperature flue gas or the entry of cold air due to local gaps.

[0009] Preferably, the high-temperature resistant coating is evenly applied to the outer surface of the conveying belt, completely covering the area where the conveying belt contacts the material. During the conveying of the material, especially when conveying high-temperature material, the high-temperature resistant coating can effectively insulate heat, preventing the conveying belt from being damaged due to direct contact with high-temperature material, significantly prolonging the service life of the conveying belt. At the same time, the coating can also reduce the adhesion of high-temperature material to the surface of the conveying belt, ensuring smooth movement of the material on the conveying belt and avoiding the influence of material residues on the cleanliness and conveying efficiency of subsequent feeding.

[0010] Preferably, the feeding hopper is in a funnel structure, the bottom end of which is fixed through an opening at one end of the top of the device body, and the bottom end outlet of the feeding hopper is opposite to the upper area of the conveying belt in the feeding assembly; the feeding hopper is mainly used for temporarily storing the material to be fed, and the funnel structure can guide the material to fall onto the conveying belt below, so that the material is prevented from scattering to other areas inside the device body during feeding, and the material is ensured to accurately enter the feeding process, the material waste is reduced, and the risk of blocking of internal parts of the device due to scattering of the material is also reduced.

[0011] Preferably, the controller is fixedly installed at a position outside the lateral surface of the device body for convenient operation by the operator, and is electrically connected with the wireless pressure sensor, the electric ejector rod and the driving motor through wires; the controller can receive the closed plate pressure signal transmitted by the wireless pressure sensor, and simultaneously receive the feeding instruction input by the operator, and then control the extension and retraction of the electric ejector rod and the start and stop of the driving motor according to the preset program or real-time signal, so as to realize automatic control of the feeding process; and the controller can be used to preset control parameters, so that the movement of the electric ejector rod, the operation of the driving motor and the opening and closing of the closed plate are linked, the whole feeding process is ensured to be coordinated and orderly, and the intelligent level and operation efficiency of the device are improved.

[0012] Compared with the related art, the self-closing feeding structure of the smelting furnace has the following beneficial effects: Compared with the prior art, by arranging the mounting seat, the transmission shaft, the closed plate, the wireless pressure sensor, the electric ejector rod and the push rod inside the device body, and cooperating with the feeding assembly, automatic and closed control of the feeding process is realized. The wireless pressure sensor can sense the stress condition of the closed plate in real time, the electric ejector rod can drive the push rod to accurately adjust the state of the closed plate, the gap between the feeding channel and the furnace mouth of the smelting furnace is effectively reduced, high-temperature flue gas and dust are prevented from overflowing to pollute the environment, heat loss is reduced, external cold air is prevented from entering, and the smelting quality and energy consumption efficiency are ensured.

[0013] Compared with the prior art, the supporting spring is arranged on the inner wall of the discharge hopper at one end of the device body, and the other end of the supporting spring is fixed to the bottom end surface of the closed plate, so that the self-closing performance of the closed plate is further optimized. The supporting spring can provide stable reset elastic force for the closed plate when no external force is applied, so that the closed plate is ensured to be tightly fitted, the sealing effect is strengthened, the impact force during opening and closing of the closed plate is buffered, the service life of the structure is prolonged, and the stability and reliability of the operation of the feeding structure are improved.

[0014] The parts not involved in the device are the same as or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The structure diagram of the self-closing feeding structure of the smelting furnace is provided. Figure 2 The internal structure schematic diagram of the self-closing type feeding structure of the smelting furnace is provided with a feeding assembly, a sealing plate, a supporting spring, a mounting seat, a wireless pressure sensor, a conveying belt and a conveying roller. Figure 3 The sealing plate structure schematic diagram of the self-closing type feeding structure of the smelting furnace is provided with a feeding assembly, a sealing plate, a supporting spring, a mounting seat, a wireless pressure sensor, a conveying belt and a conveying roller. Figure 4 The high-temperature-resistant coating structure schematic diagram of the self-closing type feeding structure of the smelting furnace is provided with a feeding assembly, a sealing plate, a supporting spring, a mounting seat, a wireless pressure sensor, a conveying belt and a conveying roller.

[0016] Reference signs in the drawings: 1, equipment body; 2, driving motor; 3, controller; 4, feeding hopper; 5, electric ejector rod; 6, discharging hopper; 7, push rod; 8, feeding assembly; 9, sealing plate; 10, supporting spring; 11, mounting seat; 12, wireless pressure sensor; 13, conveying belt; 14, high-temperature-resistant coating; 15, conveying roller. Specific implementation

[0017] The utility model will be further explained in connection with the drawings and implementation. Embodiment

[0018] Please see Figures 1-4, the self-closing feeding structure of the smelting furnace, the equipment body 1 adopts a steel welded frame structure as the mounting reference of all components, the corresponding positions of the two side walls inside are fixedly installed with mounting seats 11 through bolts, the mounting seats 11 are U-shaped steel structures, the inside is embedded into a deep groove ball bearing seat through interference fit, the two ends of the transmission shaft are rotatably connected through the inner ring of the bearing seat, the rolling friction coefficient of such rolling friction fit is small, which can ensure the flexible rotation of the transmission shaft and provide stable support for the opening and closing of the closing plate 9; the two transmission shafts are distributed along the equipment body 1 with a horizontal interval of 50-80 cm, the closing plate 9 is made of high-temperature-resistant alloy steel plate, the edges on both sides are fixed with the outer wall of the transmission shaft through welding, forming an integrated rotating structure of “transmission shaft-closing plate 9”, through this connection mode, the closing plate 9 can rotate around the transmission shaft by 60°-80°, thereby controlling the on-off of the feeding channel; the wireless pressure sensor 12 is embedded and installed on the top surface of the closing plate 9, a groove matching the size of the sensor is first formed on the top of the closing plate 9 during installation, the sensor is fixed in the groove through high-temperature-resistant adhesive, forming a rigid connection, which can synchronously sense the push rod 7 pressure, material impact force and support spring 10 tension received by the closing plate 9, the sensor lead wire passes through the preset threading hole inside the closing plate 9 and is wired along the inner wall of the equipment body 1 to the outside controller 3, realizing accurate force signal acquisition; the electric jack 5 is installed through flange bolt connection at the position on the top surface of the equipment body 1 directly above the center of the closing plate 9, the output end (piston rod) of the electric jack 5 penetrates the preset guide hole at the top of the equipment body 1, both are gap-fitted with a gap of 0.1-0.2 mm, which not only ensures smooth extension and retraction of the piston rod, but also avoids offset of the push rod 7 caused by shaking, the output end is fixed with the top end of the push rod 7 through threaded connection, the push rod 7 is a solid steel rod, the bottom end is processed into an arc contact surface to avoid scratching when contacting the closing plate 9, the electric jack 5 and the push rod 7 form a driving unit, which can realize automatic adjustment of the closing plate 9 through precise thrust control; the feeding assembly 8 is fixedly installed inside the equipment body 1 below through a support bolt, located in the channel area between the feed hopper 4 directly below and the closing plate 9, ensuring the continuity of the material conveying path, which cooperates with the closing plate 9 to form “conveying-sealing” collaborative control, conveying materials when the closing plate 9 is opened and stopping conveying when it is closed, finally realizing automatic sealing of the feeding process and solving the pollution and energy consumption problems of traditional open feeding. Embodiment

[0019] Please refer to Figures 1-4The device body 1 is provided with a discharge hopper 6 at one end close to the smelting furnace. The discharge hopper 6 is made of a tapered steel structure, and the large-diameter end is bolted to the device body 1 through a flange, and the small-diameter end is connected to the furnace mouth of the smelting furnace through a flexible sealing sleeve. This detachable connection facilitates later maintenance and replacement. The discharge hopper 6 not only serves as a material guiding channel to guide the material to accurately enter the smelting furnace, but also provides an installation carrier for the supporting spring 10. Steel spring seats are welded to the inner walls of the discharge hopper 6. The supporting spring 10 is a high-temperature-resistant cylindrical spiral spring, one end of which is fixed to the spring seat through welding, and the other end is connected to the hanging ring welded to the bottom surface of the sealing plate 9 through a hook. During installation, the initial pre-compression amount of the spring is ensured to be 5-10mm, so that the sealing plate 9 maintains a closed state tightly adhering to the inner wall of the discharge hopper 6 without external force. The supporting spring 10 and the sealing plate 9 form an elastic connection. When the sealing plate 9 is opened, the spring is stretched to generate a reverse tension (the tension is proportional to the stretching amount), forming a buffer force to avoid rigid collision. When the sealing plate 9 is closed, the spring returns to the initial pre-compression state, and the tension tightly presses the sealing plate 9 against the ceramic fiber gasket on the inner wall of the discharge hopper 6, forming a surface contact seal. The pre-tightening force of the supporting spring 10 ensures that the gasket and the sealing plate 9 are always tightly adhered, effectively preventing high-temperature flue gas from overflowing, and solving the problem of poor sealing of the traditional structure. Embodiment

[0020] Please refer to Figures 1-4 The two conveying rollers 15 inside the feeding assembly 8 are made of seamless steel pipes, and the surfaces are knurled to enhance friction. The two ends are bolted to the internal support of the device body 1 through bearing seats, and are distributed in parallel along the material conveying direction with a spacing of 1.5-2m. The two conveying rollers 15 are connected by a high-temperature-resistant rubber conveyor belt, and the inner side of the conveyor belt 13 is attached to the surface of the conveying roller 15. The tightness is adjusted by a tensioning device composed of a tensioning roller and an adjusting bolt, so that the tensioning force of the conveyor belt 13 is maintained at 20-30kN to avoid slipping. The conveying roller 15 is driven by the driving motor 2, and provides support and power transmission for the conveyor belt 13. The conveyor belt 13 serves as a material conveying carrier to realize continuous and stable feeding. The three work together to realize automatic material conveying, replacing manual feeding to improve efficiency and safety by avoiding manual contact with high-temperature areas. Embodiment

[0021] Please refer to Figures 1-4, two support springs 10 are symmetrically installed on the left and right sides of the bottom end surface of the closure plate 9, symmetrically distributed with the center line of the closure plate 9, the interval is consistent with the interval of the spring seat on the inner wall of the discharge hopper 6, and the spring specifications are completely consistent. When installing, ensure that the initial pre-compression amount and the stretching direction of the two springs are exactly the same, and avoid force deviation; the symmetrically distributed support springs 10 provide bidirectional balanced tension for the closure plate 9, forming a "two-point support" structure. When the closure plate 9 is rotated under the pressure of the push rod 7, the two springs are stretched synchronously, and the tension generated is equal in size and symmetric in direction, avoiding the inclination of the closure plate 9 due to excessive unilateral force. When the closure plate 9 is reset, the two springs are contracted synchronously, and the tension is uniformly applied to the bottom end of the closure plate 9, ensuring that the closure plate 9 rotates smoothly along the transmission shaft axis without deviation when the sealing surface is fitted. This symmetrical installation method solves the problem of the inclination of the closure plate 9 caused by unilateral spring, ensures uniform fitting of the sealing surface to avoid local gaps, and balanced tension makes the opening and closing action of the closure plate 9 smooth, reducing friction loss with other components, while enhancing the anti-deformation ability of the closure plate 9 in high temperature environment, further improving the structural reliability. Embodiment

[0022] Please refer to Figures 1-4 The high-temperature-resistant coating 14 on the outer surface of the conveying belt 13 is made of organic silicon high-temperature-resistant paint and is applied by spraying process. The coating covers the entire outer surface of the conveying belt 13, avoiding local uncovered areas from being damaged by high temperature. The coating is chemically combined with the surface of the conveying belt 13, has strong adhesion and is not easy to fall off during bending and stretching of the conveying belt 13. The smooth surface of the coating has low friction coefficient, which does not affect the friction transmission between the conveying belt 13 and the conveying roller 15, and reduces material adhesion. The high-temperature-resistant coating 14 can isolate the direct high-temperature contact between the material and the conveying belt 13, avoid the aging and cracking of the conveying belt 13 due to long-term high-temperature baking, extend the service life of the conveying belt 13 by 3-5 times, reduce material residue, especially for sticky materials, reduce cleaning frequency, and the corrosion resistance of the coating can resist chemical corrosion of impurities in the material, ensuring stable performance of the conveying belt 13. Embodiment

[0023] Please refer to Figures 1-4The feed hopper 4, installed through the top of the equipment body 1, is made of stainless steel and has a tapered structure that is wider at the top and narrower at the bottom. The lower port is bolted to the opening at the top of the equipment body 1 via a flange. The opening size matches the lower diameter of the feed hopper 4. Rubber sealing gaskets are installed between the flanges to prevent dust from overflowing from the connection. Inside the feed hopper 4, 3-4 inclined guide plates are welded together with the inner wall of the feed hopper 4 to form a material distribution channel. After the material is fed in, it slides down along the guide plates and is evenly distributed on the conveyor belt 13 below, avoiding material accumulation in a localized area of ​​the conveyor belt 13. The feed hopper 4 enlarges the material inlet area, facilitating unloading by forklifts or hopper trucks and reducing material spillage. The guide plates guide the material to be evenly distributed, ensuring balanced force on the conveyor belt 13 and preventing the conveyor belt 13 from deviating due to local overload. The flange sealing connection, combined with the overall enclosed structure, further improves the working environment and meets environmental protection requirements. Example

[0024] Please refer to the following: Figures 1-4 The controller 3, mounted on the outer surface of the equipment body 1, is a PLC control cabinet, fixed in an easily accessible position with bracket bolts. The controller 3 integrates a power module, CPU module, and input / output modules, connected to the wireless pressure sensor 12 (signal input), electric push rod 5 (drive output), and drive motor 2 (drive output) via shielded wires. The wires are threaded through a metal corrugated pipe and fixed along the outer wall of the equipment body 1 to prevent high-temperature baking or mechanical damage. The analog signal from the wireless pressure sensor 12 is transmitted to the input module of the controller 3. The controller 3 outputs control signals according to a preset program, driving the extension and retraction of the electric push rod 5 and the start and stop of the drive motor 2 via relays. The controller 3 is equipped with a touch screen that can display parameters such as pressure value, electric push rod 5 position, and motor speed in real time, supporting manual / automatic mode switching. The controller 3 acts as the "brain" of the entire system, receiving sensor signals and issuing control commands to achieve automated closed-loop control of the feeding process. Shielded wires and metal corrugated pipes ensure stable signal transmission, while the touch screen interface enhances human-machine interaction convenience. In automatic mode, the system can automatically adjust the actions of each component according to the pressure signal, reducing manual intervention and lowering the error rate, ultimately achieving efficient, energy-saving, and environmentally friendly feeding operations.

[0025] It should be noted that the control circuit of controller 3 can be implemented by simple programming by those skilled in the art, and is common knowledge in the field. It is only used and not modified, so the control method and circuit connection will not be described in detail.

[0026] The working principle of the self-closing feeding structure for the smelting furnace provided by this utility model is as follows: When the equipment is not started, the support spring 10 is in a naturally extended state. Under its elastic force, the sealing plate 9 rotates around the mounting base 11 via the drive shaft to the closed position, tightly sealing the channel connecting the equipment body 1 and the furnace opening, forming an effective seal to prevent the overflow of high-temperature flue gas from the furnace and the entry of external cold air. At this time, the electric push rod 5 is in a retracted state, the push rod 7 does not contact the sealing plate 9, and the wireless pressure sensor 12 monitors the pressure on the sealing plate 9 in real time and transmits the data to the controller 3. When feeding is required, the operator issues a command through the controller 3, the feeding component 8 is started, and the electric push rod 9 is driven to start the feeder. Machine 2 drives the conveyor roller 15 to rotate, which in turn drives the conveyor belt 13, which is coated with a high-temperature resistant coating 14 on the outside, to rotate. The material to be fed is put into the feed hopper 4 at one end of the top of the equipment body 1 and is conveyed at a constant speed to the discharge hopper 6 by the conveyor belt 13. As the material moves on the conveyor belt 13 to a position close to the closed plate 9, the controller 3 starts the electric push rod 5 according to the preset program or the initial pressure signal fed back by the wireless pressure sensor 12. The output end of the electric push rod 5 extends and pushes the push rod 7 downward. The push rod 7 acts on the top of the closed plate 9 to overcome the elastic force of the support spring 10, so that the closed plate 9... The feeding channel is opened by rotating clockwise (or counterclockwise, depending on the actual installation direction) around the drive shaft. Material enters the smelting furnace through the open channel under the continuous conveying of the conveyor belt 13. During this process, the wireless pressure sensor 12 continuously monitors the combined pressure of the sealing plate 9, the push rod 7, and the material, and transmits the data to the controller 3 in real time. The controller 3 fine-tunes the thrust of the electric push rod 5 according to pressure changes to ensure that the channel opening matches the material conveying volume, thus preventing material blockage or seal failure. When all the material conveyed by the conveyor belt 13 has entered the smelting furnace, the drive motor 2 of the feeding assembly 8 stops operating. As belt 13 stops working, controller 3 receives the stop signal from feeding assembly 8 and controls electric push rod 5 to retract. Push rod 7 gradually disengages from sealing plate 9. At this time, the elastic force of support spring 10 restores and pulls sealing plate 9 to rotate in the opposite direction around the drive shaft until sealing plate 9 returns to the initial closed position to reseal the channel. Wireless pressure sensor 12 detects that the pressure of sealing plate 9 has returned to the initial sealing state and transmits the signal to controller 3. Controller 3 confirms that the seal is in place and controls electric push rod 5 to remain in the retracted state. The entire feeding process is completed, and the equipment returns to the initial sealed state to wait for the next feeding command.

[0027] It should be noted that all components used in this application are standard parts that can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets and welding that are mature in the prior art. The mechanical parts and electrical equipment adopt conventional models in the prior art. The circuit connection adopts conventional connection methods in the prior art. The electrical equipment is connected to an external safe power source. These will not be described in detail here.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A self-closing feeding structure for a smelting furnace, comprising the equipment body (1), characterized in that, The device body (1) is equipped with a mounting base (11). A drive shaft is movably mounted inside the mounting base (11) via a bearing seat. A sealing plate (9) is connected between the two drive shafts. A wireless pressure sensor (12) is embedded in the top surface of the sealing plate (9). An electric push rod (5) is mounted on the top surface of the device body (1). The output end of the electric push rod (5) passes through the top surface of the device body (1) and is connected to a push rod (7). A feeding assembly (8) is installed inside the device body (1).

2. The self-closing feeding structure for the smelting furnace according to claim 1, characterized in that, The equipment body (1) has a discharge hopper (6) installed through one end, and a support spring (10) is installed on the inner wall of the discharge hopper (6). The other end of the support spring (10) is fixed to the bottom surface of the closing plate (9).

3. The self-closing feeding structure for the smelting furnace according to claim 1, characterized in that, The feeding assembly (8) includes a conveyor roller (15) inside, and the two conveyor rollers (15) are connected by a conveyor belt (13). The conveyor rollers (15) are driven by a drive motor (2).

4. The self-closing feeding structure for the smelting furnace according to claim 2, characterized in that, Two support springs (10) are installed, and the two support springs (10) are symmetrically installed on the bottom surface of the closed plate (9).

5. The self-closing feeding structure for the smelting furnace according to claim 3, characterized in that, The outer surface of the conveyor belt (13) is coated with a high-temperature resistant coating (14).

6. The self-closing feeding structure for a smelting furnace according to claim 1, characterized in that, The top end of the equipment body (1) is equipped with a feed hopper (4).

7. The self-closing feeding structure for a smelting furnace according to claim 1, characterized in that, A controller (3) is installed on the outer surface of the device body (1).

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