A rotary unloading device

Abstract

The utility model discloses a kind of rotary discharging devices, it is related to discharging device technical field, including material pipe, helical blade, bearing frame, first support platform and dredging rod, the material pipe right side is equipped with dredging mechanism, the dredging mechanism includes second support platform, hydraulic rod and dredging rod, the hydraulic rod is driven by external power system, dredging rod is pushed to material pipe inside, directly crush and push out the silt in material pipe, to realize dredging function, by helical blade pitch gradual change design and hydraulic drive dredging rod, combine rotor positive and negative rotation, realize three-dimensional clearing, effectively break up agglomerated material and push out blockage, significantly reduce material jamming failure rate, scraper angle is adjusted with helical rotation self-adapting, dynamically adhere to material pipe inner wall, remove adhered material residue, while disc spring provides elastic pre-tightening force, automatically compensate the wear clearance of scraper, extend scraper service life, reduce shutdown replacement frequency.

Description

Technical Field

[0001] This utility model relates to the technical field of feeding devices, specifically a rotary feeding device. Background Technology

[0002] In the steel smelting process, the stable delivery of raw materials directly affects production continuity and equipment lifespan. Existing rotary valve equipment has significant shortcomings in dealing with the unique material characteristics of the metallurgical industry: uneven material particle size (5-80mm), metal expansion and deformation caused by high temperature (200-400℃), and high dust concentration (>200mg / m³). 3 Problems such as sealing failure caused by this issue have led to key technical challenges in the application of traditional feeding devices in the metallurgical industry, including material jamming and shutdown, uncontrollable feeding speed, and insufficient wear resistance. For example:

[0003] The rotary kiln feeding device described in application number CN202421832645.7 has a blockage-clearing design based on the principle of physical vibration. A hydraulic cylinder drives a striking rod to reciprocate against the wall of the feeding chamber, using mechanical impact to disperse accumulated materials. This structure has few components, a simple assembly process, and requires no complex power transmission system. Raw material costs and processing difficulty are low, making it suitable for small and medium-sized production scenarios sensitive to equipment costs. However, this blockage-clearing method has significant limitations: the striking force is indirectly transmitted to the blockage through the wall of the feeding chamber. When the material has high moisture content, high hardness, or forms a stubborn "bridging" blockage, the vibration energy... The amount of material removed will decrease significantly due to the elastic deformation of the wall surface and the friction between materials, resulting in low unblocking efficiency. For example, for 400℃ high-temperature sintered mineral powder commonly used in the metallurgical industry, the hard lumps formed after high-temperature solidification are difficult to remove by simple vibration. Multiple shutdowns and manual intervention may be required, which not only affects the continuity of production, but also causes fatigue damage to the feeding chamber structure due to frequent knocking, shortening the service life of the equipment. In addition, physical vibration unblocking cannot actively break up materials, but only relies on impact force to loosen the blockage. It has poor adaptability to materials with uneven particle size and is prone to complex blockages where large particles are stuck and fine powders are stuck together, further reducing the unblocking effect. Utility Model Content

[0004] The purpose of this invention is to provide a rotary feeding device to solve the problems mentioned in the background section. Existing rotary feeding devices on the market use hydraulic rods to drive a dredging rod to crush and push out blockages, resulting in direct clearing. Compared with the knocking clearing method of rotary kiln feeding devices, the former has a strong ability to handle complex blockages, but the hydraulic system is costly and complex to maintain, while the latter has a simple structure, low cost, and limited clearing effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rotary feeding device, comprising a material pipe, spiral blades, a support frame, a first support platform, and a dredging rod;

[0006] A dredging mechanism is provided on the right side of the material pipe. The dredging mechanism includes a second support platform, a hydraulic rod, and a dredging rod. The hydraulic rod is driven by an external power system to push the dredging rod into the material pipe, directly crushing and pushing out the blockage in the material pipe, thereby achieving the dredging function.

[0007] As a preferred technical solution of this utility model, the open structure on the left side of the material pipe is used for material discharge, and the upper right side of the material pipe is connected to the flange interface, and the feed end above the flange interface has a square structure.

[0008] Using the above technical solution, the left side of the material pipe is designed as an open discharge structure, which, together with the flange interface of the square feed end on the upper right side, forms a straight flow channel for feeding, conveying and discharging. This avoids material stagnation at the feed inlet due to abrupt changes in shape. The square feed end can be directly connected to the square discharge port of the upstream silo, reducing the risk of material leakage at the transfer point. The open discharge structure ensures that large particles of material are discharged without obstruction, improving the discharge efficiency.

[0009] As a preferred technical solution of this utility model, a transducer is fixedly connected to the lower surface of the material tube, and a pair of first support platforms are fixedly connected to the lower part of the material tube. The first support platforms are fixed to the upper surface of the support frame by bolts.

[0010] Using the above technical solution, the transducer fixed on the lower surface of the material pipe can generate high-frequency vibration, which can break the material adhesion layer in real time and prevent the wet material from sticking to the inner side of the pipe wall to form a hanging material. A pair of first support platforms are connected to the bearing frame by bolts to provide stable bottom support. At the same time, the bolt connection method facilitates the overall disassembly and maintenance of the device and shortens the maintenance time.

[0011] As a preferred technical solution of this utility model, the material tube is rotatably connected to the gear tube on the side, the right surface of the gear tube is a gear structure, and the left side of the gear tube is fixedly connected to the helical blade. The helical blade adopts a pitch gradually changing structure along the axial direction. The gear on the right side of the gear tube is fixedly connected to the gear of the output shaft of the variable frequency motor. The variable frequency motor is fixedly connected to the second support platform. The second support platform is fixed to the upper surface of the support frame by bolts.

[0012] Using the above technical solution, the gear on the right side of the gear tube meshes with the gear on the output shaft of the variable frequency motor to achieve stable rotation drive of the spiral blades. Compared with belt drive, gear transmission has stronger resistance to dust interference and more precise transmission ratio. Combined with the variable frequency motor, the speed of the spiral blades can be precisely controlled to meet the flow control requirements of different materials. The second support platform fixes the variable frequency motor and provides a positioning reference for gear meshing to ensure transmission stability.

[0013] As a preferred technical solution of this utility model, the surface of the spiral blade is fixedly connected to a fixing clip, two fixing clips are a group, and a support rod is slidably connected between the two fixing clips. The support rod has an H-shaped structure, and a scraper is fixedly connected to one side of the support rod by a bolt, and a disc spring is fitted on the other side of the support rod.

[0014] Using the above technical solution, the fixing clamp on the surface of the spiral blade is slidably connected to the support rod, so that the scraper can adaptively adjust its angle as the spiral rotates, dynamically conforming to the inner wall of the material tube to remove the adhering material residue. The disc spring of the H-shaped support rod set provides elastic preload, automatically compensating for the wear gap of the scraper and avoiding the aggravation of blade wear caused by rigid contact. This structure is especially suitable for high hardness materials, extending the service life of the scraper and reducing the frequency of downtime for replacement.

[0015] As a preferred technical solution of this utility model, a through hole is opened above the second support platform, and the second support platform is slidably connected to the unclogging rod through the through hole. The gear tube passes through the left side of the unclogging rod, and the left head of the unclogging rod has a tapered structure.

[0016] The above technical solution features a tapered head design on the left side of the unblocking rod, which reduces the resistance to inserting into the material pile and facilitates rapid penetration of the jammed material layer. Its axial arrangement through the gear tube allows the unblocking action to directly act on the rotation center area of ​​the spiral blades—an area prone to forming a "dead material zone" due to the accumulation of large particles. The through hole of the second support platform provides guidance for the unblocking rod, ensuring accurate unblocking direction and avoiding equipment damage caused by deflection.

[0017] As a preferred embodiment of this utility model, the right side of the unblocking rod is fixedly connected to the hydraulic rod, the hydraulic rod is driven by an external hydraulic assembly, and the hydraulic rod is fixed to the upper surface of the support frame by bolts.

[0018] Using the above technical solution, the hydraulic rod drives the unblocking rod to achieve a long axial stroke, which can effectively crush lumpy materials. Compared with pneumatic or electric methods, hydraulic drive has a fast response speed and stable output force. With the real-time feedback of torque sensor, it can automatically perform reciprocating impact unblocking without manual intervention, improving the automation level of the system. The hydraulic rod is fixed to the support frame with bolts, which is convenient for disassembly and maintenance, and the oil circuit system can adapt to wide temperature conditions.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. Triple anti-jamming structure: Through the gradual pitch design of the spiral blades and the hydraulic drive of the unblocking rod, combined with the forward and reverse rotation of the rotor, three-dimensional unblocking is achieved, which effectively breaks up the lumpy materials and pushes out the blockage, significantly reducing the failure rate of material jamming.

[0021] 2. Dynamic wall cleaning function: The scraper adapts to the angle as the spiral rotates, dynamically conforming to the inner wall of the material tube to remove adhering material residue. At the same time, the disc spring provides elastic preload, automatically compensating for the wear gap of the scraper, extending the scraper's service life and reducing the frequency of downtime for replacement.

[0022] 3. Variable frequency speed control system: By constructing a PID closed-loop control model through weighing sensors and material level radar signals, the speed of the spiral blades can be precisely adjusted according to the material characteristics and production requirements, so as to achieve precise control of the feeding speed and meet the flow control requirements under different working conditions. At the same time, compared with the traditional constant speed drive method, the power consumption of the motor is reduced.

[0023] 4. Wear-resistant design: The spiral blades are made of stainless steel with a tungsten carbide wear-resistant layer welded on the surface, which significantly improves the wear resistance of the blades; the scraper is made of polymer material, combined with the elastic compensation of the disc spring, which reduces rigid wear with the inner wall of the feed tube, extends the service life of key components, and the modular design shortens the replacement time of vulnerable parts and improves production continuity.

[0024] 5. Multiple sealing structure: The flange interface is equipped with an annular air curtain device and a labyrinth sealing ring to effectively prevent dust leakage; the bearing housing adopts a circulating water cooling structure to ensure stable operation of the equipment in the harsh metallurgical environment of high temperature and high dust.

[0025] 6. Intelligent monitoring and diagnosis: Built-in multiple sensors monitor the equipment's operating status in real time and upload the data to the steel plant's MES system through an industrial IoT gateway. When abnormal parameters reach the set threshold, an early warning shutdown is automatically triggered, enabling early warning of faults and improving the reliability and automation level of equipment operation. Attached Figure Description

[0026] Figure 1 This is a side view of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the material tube and transducer structure of this utility model;

[0028] Figure 3 This is a side view of the cross-sectional structure of this utility model;

[0029] Figure 4 This is a schematic diagram of the spiral blade and gear tube structure of this utility model;

[0030] Figure 5 This is a schematic diagram of the scraper and support rod structure of this utility model;

[0031] Figure 6 This is a schematic diagram of the disc spring and fixing clip structure of this utility model;

[0032] Figure 7 This is a side view of the hydraulic rod structure of this utility model.

[0033] In the diagram: 1. Material pipe; 2. Spiral blade; 3. Support frame; 4. First support platform; 5. Gear tube; 6. Second support platform; 7. Hydraulic rod; 8. Variable frequency motor; 9. Flange interface; 10. Transducer; 11. Scraper; 12. Support rod; 13. Disc spring; 14. Fixing clamp; 15. Unblocking rod. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Please see Figures 1-7 The present invention provides a rotary feeding device comprising a material pipe 1, a spiral blade 2, a support frame 3, a first support platform 4, a gear tube 5, a second support platform 6, a hydraulic rod 7, a variable frequency motor 8, a flange interface 9, a transducer 10, a scraper 11, a support rod 12, a disc spring 13, a fixing clamp 14, and a dredging rod 15.

[0036] A clearing mechanism consisting of a second support platform 6, a hydraulic rod 7, and a clearing rod 15 is installed on the right side of the material pipe 1. The hydraulic rod 7 drives the clearing rod 15 to crush and push out the blockage inside the material pipe 1. The open structure on the left side of the material pipe 1 is used for material discharge, and the flange interface 9 at the square feed end on the upper right side can connect to the upstream silo to reduce material leakage. The transducer 10 on the lower surface generates high-frequency vibration to prevent material adhesion. The first support platform 4 below is fixed to the bearing frame 3 with bolts for easy disassembly and maintenance. The gear tube 5 rotatably connected to the side of the material pipe 1 has a helical blade 2 fixed on the left side, and the gear on the right side meshes with the output shaft gear of the variable frequency motor 8. The spiral blade 2 adopts a gradually changing pitch structure. The variable frequency motor 8 is fixed to the bearing frame 3 through the second support platform 6 to precisely control the speed. The surface fixing clamp 14 of the spiral blade 2 is slidably connected to the support rod 12. The support rod 12 is connected to the scraper 11 on one side and the disc spring 13 is mounted on the other side, so that the scraper 11 can adaptively conform to the inner wall of the material pipe 1 to clean the slag and compensate for wear. The left conical head of the unblocking rod 15 passes through the shaft of the gear tube 5 and is fixed to the hydraulic rod 7 on the right side. The hydraulic drive has a fast response and stable output force, can automatically clear blockages and is easy to maintain. The through hole of the second support platform 6 provides guidance for the unblocking rod 15 to ensure accurate blockage clearing.

[0037] Working principle: When using a rotary feeding device, the material enters the material pipe 1 through the flange interface 9 on the upper right side of the material pipe 1. Since the feeding end above the flange interface 9 has a square structure, it can be directly connected to the square discharge port of the upstream silo, reducing the risk of material leakage at the junction.

[0038] The variable frequency motor 8 drives the gear tube 5 and the spiral blade 2 fixed on its left side to rotate through gear transmission. The spiral blade 2 adopts a pitch gradually changing structure along the axial direction. The pitch is small at the feeding end and large at the discharging end. During the rotation, it generates axial thrust on the material, causing the material to move from the feeding end to the discharging end. At the same time, the pitch gradually changing design can promote the material to flow faster, forming a material acceleration channel, realizing the continuous conveying of the material, and finally discharging from the open structure on the left side of the material tube 1. The open discharging structure ensures that large particles of material are discharged without obstruction, improving the feeding efficiency.

[0039] During normal conveying, the scraper 11 on the surface of the spiral blade 2 is connected to the spiral blade 2 through the fixing clamp 14 and the support rod 12. The other side of the support rod 12 is fitted with a disc spring 13, so that the scraper 11 can adaptively adjust its angle as the spiral rotates, dynamically fit the inner wall of the material pipe 1, and remove the material residue adhering to the inner side of the pipe wall. The elastic preload of the disc spring 13 can automatically compensate for the wear gap of the scraper 11 and maintain the wall cleaning effect.

[0040] When material becomes blocked in the material pipe 1, if the configured torque sensor detects that the rotor resistance torque exceeds the set value ≥200 N·m, the external hydraulic component drives the hydraulic rod 7 to push the unblocking rod 15 into the material pipe 1. The left head of the unblocking rod 15 has a conical structure, which can reduce the resistance of inserting into the material pile and facilitate quick penetration of the jammed layer. It is arranged axially through the gear tube 5 and directly acts on the rotation center area of ​​the spiral blade 2. It is easy to form a "dead material zone" due to the accumulation of large particles of material, crushing and pushing out the blockage, thus realizing the unblocking function. At the same time, the control algorithm can make the spiral blade 2 rotate in both directions, which, together with the reciprocating impact action of the unblocking rod 15, realizes three-dimensional unblocking and effectively solves the material jamming problem.

[0041] A weighing sensor is configured to detect the material feeding amount in real time, and a material level radar is configured to monitor the material level in the silo in real time. Both transmit the signals to the control system. The control system combines preset parameters and material characteristics, such as detecting the material moisture content through an infrared moisture meter, to construct a PID closed-loop control model, calculate the required rotation speed of the spiral blade 2, and output a control signal to the variable frequency motor 8. The variable frequency motor 8 adjusts its output speed according to the signal, thereby achieving precise control of the feeding speed. For example, when the infrared moisture meter detects that the material moisture content is >5%, the control system automatically reduces the speed of the variable frequency motor 8 by 10% to avoid blockage or unstable flow caused by high material moisture content and poor flowability.

[0042] The transducer 10 fixed on the lower surface of the material pipe 1 can generate high-frequency vibration, which can break the material adhesion layer in real time, prevent the wet material from sticking to the inner side of the pipe wall and form a hanging material, and ensure the smooth flow of the material in the material pipe 1.

[0043] Nine flange interfaces are equipped with annular air curtain devices that form a continuous air curtain using 0.5MPa compressed air. Combined with labyrinth seal rings, this prevents dust from leaking from the nine flange interfaces. The bearing housing is equipped with a circulating water cooling structure that continuously removes the heat generated by the bearing during operation, maintaining the bearing temperature within a safe range and ensuring the sealing performance of the equipment and the normal operation of the bearing in high-temperature and high-dust environments.

[0044] The system is equipped with vibration sensors, temperature sensors, and current detection modules to collect real-time operating data such as equipment vibration values, bearing temperature, and motor current, and uploads the data to the steel plant's MES system via an industrial IoT gateway.

[0045] The MES system analyzes and processes the data. When the vibration value exceeds 4.5 mm / s of the ISO10816-3 standard, or when the bearing temperature is abnormal or the motor current fluctuation exceeds the set range, the system automatically triggers an early warning signal to prompt the operator to check and maintain the equipment. If the abnormal situation is serious, the system will automatically control the equipment to shut down to prevent the fault from escalating. This achieves intelligent monitoring of the equipment's operating status and early warning of faults, ensuring the safe and stable operation of the equipment.

[0046] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary feeding device, comprising a feed pipe (1) and a spiral blade (2); characterized in that: A dredging mechanism is provided on the right side of the material pipe (1). The dredging mechanism includes a second support platform (6), a hydraulic rod (7), and a dredging rod (15). The hydraulic rod (7) is driven by an external power system to push the dredging rod (15) into the material pipe (1) and directly crush and push out the blockage in the material pipe (1), thereby realizing the dredging function.

2. The rotary feeding device according to claim 1, characterized in that, The material pipe (1) has an open structure on the left side for discharging material, and the upper right side of the material pipe (1) is connected to the flange interface (9), and the feed end above the flange interface (9) has a square structure.

3. The rotary feeding device according to claim 1, characterized in that, A transducer (10) is fixedly connected to the lower surface of the material pipe (1), and a pair of first support platforms (4) are fixedly connected to the lower part of the material pipe (1). The first support platforms (4) are fixed to the upper surface of the support frame (3) by bolts.

4. The rotary feeding device according to claim 1, characterized in that, The material tube (1) is rotatably connected to the gear tube (5) on its side. The right side surface of the gear tube (5) is a gear structure, and the left side of the gear tube (5) is fixedly connected to the spiral blade (2). The spiral blade (2) adopts a pitch that gradually changes along the axial direction. The gear on the right side of the gear tube (5) is fixedly connected to the output shaft gear of the variable frequency motor (8). The variable frequency motor (8) is fixedly connected to the second support platform (6). The second support platform (6) is fixed to the upper surface of the support frame (3) by bolts.

5. A rotary feeding device according to claim 1, characterized in that, The surface of the spiral blade (2) is fixedly connected to a fixing clip (14). Two fixing clips (14) are in a group. A support rod (12) is slidably connected between the two fixing clips (14). The support rod (12) has an H-shaped structure. A scraper (11) is fixedly connected to one side of the support rod (12) by bolts. A disc spring (13) is fitted on the other side of the support rod (12).

6. A rotary feeding device according to claim 1, characterized in that, A through hole is provided above the second support platform (6), and the second support platform (6) is slidably connected to the unblocking rod (15) through the through hole. The unblocking rod (15) passes through the gear tube (5) on the left side, and the head of the unblocking rod (15) is a tapered structure.

7. The rotary feeding device according to claim 1, characterized in that, The right side of the unblocking rod (15) is fixedly connected to the hydraulic rod (7), which is driven by an external hydraulic assembly and is fixed to the upper surface of the support frame (3) by bolts.

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