Automatic lifting and screw conveyor feeding machine for ton bags

Abstract

This application discloses an automatic lifting and screw conveyor feeding machine for ton bags, relating to the field of chemical production equipment technology. The feeding machine includes a gantry crane frame, an electric hoist, a screw feeder, and a central control system. The gantry crane frame includes a multi-stage truss support base and a track beam. The track beam is rigidly connected to the top of the multi-stage truss support base. The electric hoist is slidably suspended on the track beam, and a lifting assembly is vertically arranged below the electric hoist. The screw feeder is located below the lifting assembly. An inlet is located at the top of one end of the screw feeder, and an outlet is located at the bottom of the other end. An electric double screw conveyor is installed inside the screw feeder, and the discharge port at the bottom of the ton bag is located directly above the inlet of the screw feeder. This application provides a conveying device with a reasonable structure, precise control, and fully automatic uniform feeding capability, which can effectively improve transportation efficiency, ensure operational safety, and reduce reliance on manual labor.

Description

Technical Field

[0001] This application relates to the field of chemical production equipment technology, and in particular to an automatic lifting and screw conveyor feeding machine for ton bags. Background Technology

[0002] In the fine chemical production process, wet materials such as oxadiazine often face problems such as uneven feeding, easy blockage, and reliance on manual operation during the feeding stage of the drying section. Currently, most companies use manual methods to feed materials from ton bags to the conveyor belt, which is not only labor-intensive and inefficient, but also poses certain safety risks. Moreover, due to the high viscosity of wet materials, they are prone to clumping or bridging at the feeding port, causing interruptions in feeding and requiring frequent manual intervention, which seriously affects the continuity and stability of production.

[0003] In related technologies, although simple lifting devices are used to assist in feeding, it is still impossible to achieve a precise match between the feeding rate and the requirements of the downstream processes, and there is a lack of systematic automated control. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an automatic lifting and screw conveyor feeding machine for ton bags, which is a conveying device with reasonable structure, precise control, and the ability to achieve fully automatic and uniform feeding, effectively improving transportation efficiency, ensuring operational safety, and reducing reliance on manual labor.

[0005] This application provides an automatic lifting and screw conveyor feeding machine for ton bags, including: a gantry lifting frame, an electric hoist, a screw feeder and a central control system; The gantry hoist frame includes a multi-stage truss support base and a track beam. The track beam is rigidly connected to the top of the multi-stage truss support base. The electric hoist is slidably suspended on the track beam. A lifting assembly is vertically arranged below the electric hoist. The lifting assembly is used to hook a ton bag. The bottom of the ton bag is provided with a discharge port. The screw feeder is located below the lifting assembly. The top of one end of the screw feeder is provided with a feed inlet, and the bottom of the other end of the screw feeder is provided with a discharge outlet. The screw feeder is equipped with an electric double screw machine, and the discharge outlet at the bottom of the ton bag is located directly above the feed inlet of the screw feeder. The central control system is connected to both the electric hoist and the electric double screw conveyor.

[0006] According to some embodiments of this application, the multi-level truss support base includes a first main support column, a second main support column, and a plurality of transverse connecting beams. The plurality of transverse connecting beams are arranged horizontally at intervals from bottom to top between the first main support column and the second main support column, and the track beam is installed on the transverse connecting beam located at the top.

[0007] According to some embodiments of this application, the multi-stage truss support base further includes multiple diagonal braces, which are respectively disposed between two adjacent transverse connecting beams.

[0008] According to some embodiments of this application, the electric hoist includes an electric hoist main unit, a lifting chain, a speed regulator, and an electrical control system. The electric hoist main unit is slidably mounted on the track beam. One end of the lifting chain is fixed and wound around the electric hoist main unit, and the other end of the lifting chain extends downward and is connected to the lifting device assembly. The speed regulator is fixedly mounted on the gantry hoist frame. The electrical control system is connected to the electric hoist main unit, the speed regulator, and the central control system.

[0009] According to some embodiments of this application, the electric hoist main unit includes a traveling trolley, a lifting motor, a coupling, a reduction mechanism, and a drum. The traveling trolley is slidably mounted on the track beam. The lifting motor, the coupling, the reduction mechanism, the drum, and the speed regulator are all integrated on the traveling trolley. The lifting motor is connected to the reduction mechanism through the coupling. The drum is connected to the output end of the reduction mechanism. One end of the lifting chain is fixed and wound around the drum. The central control system is connected to the traveling trolley.

[0010] According to some embodiments of this application, the electric hoist main unit further includes a safety brake, which is disposed between the hoisting motor and the reduction mechanism, and is connected to the electrical control system.

[0011] According to some embodiments of this application, the lifting assembly includes a lifting hook and a safety lock, the safety lock being mounted on the lifting hook, and the other end of the lifting chain extending downward and connected to the lifting hook.

[0012] The technical effects achieved by this application are as follows: 1. Solve the problems of material blockage and uneven feeding: The twin-screw conveyor has a forced pushing function, which can effectively prevent wet material from accumulating or blocking at the feed inlet. During the screw conveying process, the material is continuously sheared and pushed, ensuring uniform and continuous output. 2. Achieve automation and reduce manual intervention: Electric hoists can automatically lift, move and unload ton bags without manual operation. The central control system uniformly schedules the lifting and conveying actions, forming a closed-loop feeding process. 3. Improve feeding accuracy and production stability: Both the electric hoist and the twin screw conveyor are speed adjustable, and the feeding amount can be flexibly adjusted according to actual production needs. The system has high responsiveness and control accuracy, which can meet the requirements of refined production. 4. Enhanced safety and structural reliability: The multi-level truss support base enhances overall rigidity and prevents equipment from swaying or tilting.

[0013] This application provides a conveying device with a reasonable structure, precise control, and fully automatic uniform feeding, which can effectively improve transportation efficiency, ensure operational safety, and reduce reliance on manual labor.

[0014] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0015] Additional aspects and advantages of this application will become apparent and readily understood in conjunction with the following description of the embodiments, in which: Figure 1 This is a schematic diagram of the structure of the automatic lifting and screw conveyor feeding machine for ton bags provided in the embodiments of this application.

[0016] Figure label: Multi-level truss support base 100, first main support column 110, second main support column 120, transverse connecting beam 130, diagonal brace 140; Track beam 210, electric hoist main unit 220, lifting chain 230, ton bag 240, lifting tool assembly 250; Feed inlet 310, discharge outlet 320, electric twin screw conveyor 330. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0018] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0020] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0021] In the fine chemical production process, wet materials such as oxadiazine often face problems such as uneven feeding, easy blockage, and reliance on manual operation during the feeding stage of the drying section. Currently, most companies use manual methods to feed materials from ton bags to the conveyor belt, which is not only labor-intensive and inefficient, but also poses certain safety risks. Moreover, due to the high viscosity of wet materials, they are prone to clumping or bridging at the feeding port, causing interruptions in feeding and requiring frequent manual intervention, which seriously affects the continuity and stability of production.

[0022] In related technologies, although simple lifting devices are used to assist in feeding, it is still impossible to achieve a precise match between the feeding rate and the requirements of the downstream processes, and there is a lack of systematic automated control.

[0023] To address the aforementioned problems, this application proposes an automatic lifting and screw conveyor feeding machine for ton bags. The embodiments of this application will be further described below with reference to the accompanying drawings.

[0024] Reference Figure 1This application provides an automatic lifting and screw conveyor feeding machine for ton bags, including a gantry crane frame, an electric hoist, a screw feeder, and a central control system. The gantry crane frame includes a multi-stage truss support base 100 and a track beam 210. The track beam 210 is rigidly connected to the top of the multi-stage truss support base 100. The electric hoist is slidably suspended on the track beam 210. A lifting assembly 250 is vertically arranged below the electric hoist for hooking. The ton bag 240 has a discharge port at its bottom; the screw feeder is located below the lifting assembly 250, with a feed inlet 310 at the top of one end and a discharge outlet 320 at the bottom of the other end; the screw feeder is equipped with an electric double screw conveyor 330, and the discharge port at the bottom of the ton bag 240 is located directly above the feed inlet 310 of the screw feeder; the central control system is connected to the electric hoist and the electric double screw conveyor 330 respectively.

[0025] The technical effects achieved by this application are as follows: 1. Solve the problems of material blockage and uneven feeding: The twin-screw conveyor has a forced pushing function, which can effectively prevent wet material from accumulating or blocking at the feed inlet 310. During the screw conveying process, the material is continuously sheared and pushed, ensuring uniform and continuous output. 2. Achieve automation and reduce manual intervention: The electric hoist can automatically lift, move and unload the 240 ton bag without manual operation. The central control system uniformly schedules the lifting and conveying actions, forming a closed-loop feeding process. 3. Improve feeding accuracy and production stability: Both the electric hoist and the twin screw conveyor are speed adjustable, and the feeding amount can be flexibly adjusted according to actual production needs. The system has high responsiveness and control accuracy, which can meet the requirements of refined production. 4. Enhanced safety and structural reliability: The multi-level truss support base enhances overall rigidity and prevents equipment from swaying or tilting.

[0026] This application provides a conveying device with a reasonable structure, precise control, and fully automatic uniform feeding, which can effectively improve transportation efficiency, ensure operational safety, and reduce reliance on manual labor.

[0027] Reference Figure 1 It is understood that the multi-level truss support base 100 includes a first main support column 110, a second main support column 120 and multiple transverse connecting beams 130. The multiple transverse connecting beams 130 are arranged horizontally and spaced between the first main support column 110 and the second main support column 120 from bottom to top. The track beam 210 is installed on the transverse connecting beam 130 located at the top.

[0028] It should be noted that the first main support column 110 and the second main support column 120, as two main "columns," bear the majority of the vertical load of the entire support structure (mainly the weight of the electric hoist, the ton bag 240, and the equipment itself). Multiple horizontally spaced transverse connecting beams 130 act like "beams," rigidly connecting the two columns to form a stable portal frame structure, ensuring the integrity and stability of the support and resisting vertical pressure. The topmost transverse connecting beam 130 is a crucial component, connecting to the vertical support to transfer the load from above. Furthermore, it serves as the mounting base for the "track beam 210," which is ultimately securely installed at the highest point of the support, providing a flat, sturdy, and elevated track for the electric hoist's trolley. This frame structure creates a large, unobstructed open space in the middle, ensuring that the ton bag 240 is lifted from the ground to a high position and has sufficient swing and operational margin during movement and feeding, without interfering with the support structure.

[0029] Reference Figure 1 It is understandable that the multi-stage truss support base 100 also includes multiple diagonal braces 140, which are respectively arranged between two adjacent transverse connecting beams 130.

[0030] In some embodiments, the multi-level truss-type support base 100 includes a first main support column 110, a second main support column 120, a first transverse connecting beam, a second transverse connecting beam, a third transverse connecting beam, a fourth transverse connecting beam, a fifth transverse connecting beam, a sixth transverse connecting beam, and a plurality of diagonal braces 140. The plurality of diagonal braces 140 include a first left diagonal bracket, a second left diagonal bracket, and a right diagonal bracket. The first, second, third, fourth, fifth, and sixth transverse connecting beams are sequentially spaced between the first main support column 110 and the second main support column 120, and both ends of the first, second, third, fourth, fifth, and sixth transverse connecting beams are respectively connected to the first main support column 110 and the second main support column 120. The first left-hand inclined bracket is obliquely positioned between the first and second transverse connecting beams, and both ends of the first left-hand inclined bracket are connected to the connection points of the first main support column 110 and the second transverse connecting beam, and the second main support column 120 and the first transverse connecting beam, respectively. The right-hand inclined bracket is obliquely positioned between the second and third transverse connecting beams, and both ends of the right-hand inclined bracket are connected to the connection points of the first main support column 110 and the second transverse connecting beam, and the second main support column 120 and the third transverse connecting beam, respectively. The second left-hand inclined bracket is obliquely positioned between the third and fourth transverse connecting beams, and both ends of the second left-hand inclined bracket are connected to the connection points of the first main support column 110 and the fourth transverse connecting beam, and the second main support column 120 and the third transverse connecting beam, respectively. One end of the electric hoist is connected to the top sixth transverse connecting beam. That is, both ends of all transverse connecting beams 130 are fixedly connected to two vertical supports (such as by welding or high-strength bolts); both ends of each diagonal brace 140 are also fixedly connected to the nodes of the transverse connecting beams 130 and the vertical supports, forming a stable triangular structure.

[0031] It should be noted that the purpose of setting up multiple diagonal braces 140 is as follows: The horizontal connecting beam 130 and the vertical support mainly form a rectangular frame. Rectangular structures are prone to deformation (parallelogram deformation) when subjected to lateral forces (such as the swaying caused by the swing of the ton bag 240, the inertial force of the equipment starting / stopping, or even slight unevenness of the ground). The addition of diagonal braces 140, together with the horizontal and vertical supports, forms multiple triangular stable structures. Triangles are the most stable shape in geometry, which can greatly improve the overall support's resistance to tilting, torsion, and swaying. Moreover, a support with insufficient rigidity and severe swaying will cause the electric hoist to move poorly, the ton bag 240 to be inaccurately positioned, and even pose safety hazards. Diagonal braces 140 ensure the sturdiness and reliability of the support, providing the most basic structural guarantee for the accuracy and safety of the entire automated feeding process.

[0032] Reference Figure 1It is understood that the electric hoist includes an electric hoist main unit 220, a lifting chain 230, a speed regulator, and an electrical control system. The electric hoist main unit 220 is slidably mounted on the track beam 210. One end of the lifting chain 230 is fixed and wound around the electric hoist main unit 220, and the other end of the lifting chain 230 extends downward and is connected to the lifting device assembly 250. The speed regulator is fixedly mounted on the gantry hoist frame. The electrical control system is connected to the electric hoist main unit 220, the speed regulator, and the central control system.

[0033] It should be noted that the electric hoist main unit 220 is the power and load-bearing core of the entire lifting system. It integrates components such as the motor, reducer, and drum, and is responsible for providing power to raise and lower the lifting chain 230, thereby realizing the vertical lifting and lowering of the ton bag 240. The lifting chain 230 is the force transmission medium, transmitting the lifting force generated by the electric hoist main unit 220 to the lifting hook and ton bag 240, bearing the entire lifting weight. The speed regulator is the key to human-machine interaction and precise control. It is fixedly installed in a convenient location for personnel to operate (rather than moving with the main unit), allowing the operator to set and adjust the lowering speed of the electric hoist in real time and accurately according to the material characteristics and production needs. This is the core operating component for achieving "uniform and controllable lowering", ensuring uniform feeding, and avoiding blockage. The electrical control system receives start and stop commands from the upper "central control system" and speed commands from the "speed regulator", and then controls the motor speed and safety brake action of the electric hoist main unit 220 to achieve the expected and precise lifting and moving functions. It is the bridge connecting the upper-level scheduling (central control system) and the lower-level execution (main unit).

[0034] Understandably, the electric hoist main unit 220 includes a traveling trolley, a lifting motor, a coupling, a reduction mechanism, and a drum. The traveling trolley is slidably mounted on the track beam 210. The lifting motor, coupling, reduction mechanism, drum, and speed regulator are all integrated on the traveling trolley. The lifting motor is connected to the reduction mechanism through the coupling, and the drum is connected to the output end of the reduction mechanism. One end of the lifting chain 230 is fixed and wound on the drum. The central control system is connected to the traveling trolley.

[0035] It should be noted that the traveling trolley is equipped with a second drive motor, which is connected to the central control system. The traveling trolley directly straddles and engages with the track beam 210, and is located at the bottom of the track beam 210. The top of the electric hoist main unit 220 is fixed and suspended directly below the traveling trolley by a pin or high-strength bolts. The two are a single moving unit. The ton bag 240 is suspended by the lifting hook of the electric hoist. Therefore, when the traveling trolley moves, it will drive the electric hoist and the ton bag 240 below it to move synchronously. The presence of the traveling trolley means that the relative position between the discharge port of the ton bag 240 and the feed port 310 of the screw feeder is no longer fixed. By driving the traveling trolley, the operator can accurately move and position the ton bag 240 directly above the feed port 310 before feeding, ensuring that all materials fall accurately into the inlet and avoiding dust and spillage.

[0036] Specifically, the electric hoist main unit 220 is rigidly connected to and suspended on the top rail beam 210 of the gantry hoist frame via its own traveling trolley or fixed base. The hoisting motor is integrated inside the electric hoist main unit 220 and is directly connected to the reduction mechanism via a coupling, serving as the power source. The reduction mechanism is tightly connected to the output end of the hoisting motor via a gear system, and the other end is connected to the drum to reduce speed and increase torque. The drum is connected to the output end of the reduction mechanism for winding and storing the lifting chain 230. The safety brake is installed between the motor and the reduction mechanism and is linked to the electrical control system circuit to achieve release when energized and locking when de-energized. The lifting chain 230: one end is fixed and... The first end is wound on the drum, and the second end extends downward, connecting to the lifting hook device via a pulley block. The lifting assembly 250 is fixedly connected to the end of the lifting chain 230 via pulleys, crossbeams, and other structures, and is the terminal component for directly hooking the ton bag 240. The speed regulator, as an independent explosion-proof control box, is fixedly installed on the gantry hoist frame in a convenient operating position. It is connected to the electrical control system of the electric hoist via a control cable and is used to send speed adjustment commands. The electrical control system is installed inside or near the electric hoist main unit 220 and is connected to the drive motor, safety brake, speed regulator, and workshop main power supply via cables. It receives commands and controls the operation of the motor and safety brake. The electric hoist main unit 220 serves as the load-bearing and moving base of the entire lifting system, transmitting force to the support frame and enabling slight lateral movement of the ton bag 240 to align with the feed inlet 310. The hoisting motor converts electrical energy into mechanical energy, providing the core power for lifting and lowering the ton bag 240; its speed regulation capability is key to achieving uniform lowering. The reduction mechanism converts the high speed of the hoisting motor into a low speed suitable for lifting operations, while simultaneously outputting a large lifting torque to ensure a smooth and powerful lifting or lowering of the ton bag 240. The drum orderly winds up and unwinds the lifting chain 230, converting rotational motion into linear motion of the lifting hook. The safety brake automatically stops immediately in the event of power failure, machine stoppage, or malfunction, preventing the ton bag 240 from falling accidentally and greatly ensuring the safety of equipment and personnel. The lifting chain 230 bears the entire weight of the ton bag 240. The system transmits the lifting force of the electric hoist main unit 220 to the lifting hook, and has a certain degree of flexibility to adapt to swinging; the lifting assembly 250 (including safety lock): directly hooks the ton bag 240, and its safety lock can form a lock to prevent the ton bag 240 from disengaging during shaking or lowering, ensuring reliable connection; the speed regulator: the key to human-machine interface and function realization, enabling operators to accurately and in real time set and adjust the lowering speed of the electric hoist, thereby achieving "adjustable rate uniform lowering", which is the core operation to ensure uniform feeding and avoid blockage; the electrical control system: the "brain" of the system, it receives instructions from the speed regulator, and accurately controls the speed and direction of the motor through frequency conversion, voltage conversion or other speed regulation methods, while coordinating the action of the safety brake to achieve the expected uniform, smooth and controllable movement.

[0037] For example, the specific working principle of the electric hoist is as follows: Initial bag hanging and lifting: The operator uses the lifting hook to hook the lifting strap of the empty ton bag 240, and starts the lifting motor through the central control system. The lifting motor rotates forward, and the torque is increased through the reduction mechanism, driving the drum to retract the lifting chain 230, smoothly lifting the empty bag to the loading position. After loading is completed, it is lifted again, and the fully loaded ton bag 240 is hoisted directly above the feed inlet 310 of the screw feeder; Start of feeding and coordinated start: The discharge port at the bottom of the ton bag 240 is opened, and the material begins to flow into the feed inlet 310 below by gravity; at this time, the double screw feeder is started synchronously; Uniform and controllable descent: The operator sets a suitable descent speed through the speed regulator according to the characteristics of the material (such as humidity and viscosity) and the needs of the downstream drying equipment; the electrical control system responds immediately, controlling the drive motor to reverse at the corresponding speed and torque, uniformly releasing the lifting chain 230; the safety brake releases evenly when energized. The system opens, allowing the drum to rotate and lower; the ton bag 240 begins to descend slowly, smoothly, and at a constant speed under control; achieving uniform feeding: this uniform descent process ensures that the pressure of the material inside the ton bag 240 on the discharge port remains dynamically constant, thus achieving continuous, uniform, and controllable flow to the downstream screw feeder, fundamentally solving the problem of blockage at the feed inlet 310 caused by uneven feeding and excessive instantaneous flow; system linkage and real-time adjustment: the lowering rate of the electric hoist and the rotation speed of the electric double screw conveyor 330 form a matching relationship. If the downstream demand increases, the lowering rate of the electric hoist and / or the rotation speed of the electric double screw conveyor 330 can be appropriately increased; if the demand decreases, the speed can be reduced; the central control system can perform real-time speed adjustment, enabling the entire system to operate in a coordinated and efficient manner; completion and reset: when all the material in the ton bag 240 is unloaded, the control switch is operated to make the electric hoist rotate forward, lifting and removing the empty bag, preparing for the next work cycle. The safety brake ensures safety throughout the entire process, especially locking immediately when the machine stops.

[0038] It should be noted that the traveling trolley's function is to drive the entire electric hoist main unit 220 and the ton bag 240 suspended below it to move laterally along the track beam 210, thereby accurately aligning the unloading port of the ton bag 240 directly above the feed inlet 310 of the screw feeder to prevent material spillage; the hoisting motor provides the original power (rotation) for vertical lifting; the coupling is used to connect the motor output shaft and the input shaft of the reduction mechanism, transmit torque, and compensate for minor installation alignment errors; the reduction mechanism converts the high-speed, low-torque output of the motor into the low-speed, high-torque output required by the drum; the drum is used to receive the low-speed, high-torque rotational motion transmitted from the reduction mechanism, and converts the rotational motion into the linear lifting motion of the lifting hook by winding or releasing the lifting chain 230.

[0039] Understandably, the electric hoist main unit 220 also includes a safety brake, which is located between the hoisting motor and the reduction mechanism and is connected to the electrical control system.

[0040] It should be noted that the speed regulator (speed controller) is a separate explosion-proof control box, fixedly installed on the gantry hoist frame in a convenient location. It connects to the electric hoist's electrical control system via a control cable and is used to send speed control commands. The electrical control system is installed inside or near the electric hoist main unit 220, and connects to the drive motor, safety brake, speed regulator, and the workshop's main power supply via cables. It receives commands and controls the operation of the motor and safety brake.

[0041] For example, in the event of an unexpected power outage, equipment failure, or emergency shutdown, the safety brake will automatically engage to securely lock the transmission system, preventing the ton bag 240 from falling due to gravity and causing production accidents or personal injury. During normal controlled shutdown, the safety brake can quickly and smoothly stop the drum rotation, helping the lifting hook and ton bag 240 to remain stable at a predetermined height, facilitating accurate positioning and stable feeding.

[0042] Understandably, the spreader assembly 250 includes a lifting hook and a safety lock, with the safety lock mounted on the lifting hook, and the other end of the lifting chain 230 extending downward and connecting to the lifting hook.

[0043] It should be noted that the lifting hook is the component that directly supports the ton bag 240. Its special design and materials enable it to safely hook the ton bag 240 sling. The safety lock (also known as the safety latch or anti-slip tongue) is a simple mechanical anti-slip device that is kept in a closed state by spring or gravity, like a "small door" blocking the opening of the lifting hook. When hooking the ton bag 240 sling, the tongue needs to be manually pushed open. After hooking, the tongue automatically springs back and closes, which can effectively prevent the ton bag 240 sling from slipping off the lifting hook due to swinging, collision or other reasons during lifting, moving or lowering.

[0044] In some embodiments, the automatic lifting and screw conveyor for ton bags also includes a sliding assembly. The pulley assembly includes a fixed pulley group and a movable pulley group. The fixed pulley group is fixedly installed inside or below the main body of the electric hoist 220 on a support. The fixed pulley group is located below the drum. After the lifting chain 230 is led out from the drum, it first passes around the fixed pulley group. The fixed pulley group is usually composed of one or more pulleys arranged in parallel. The number of pulleys (matching the number of movable pulleys) directly determines the pulley group ratio (such as 2x, 4x, 6x, etc.). In the ton bag 240 feeding application, in order to obtain a stable, low-speed, and large-tonnage lifting capacity, a 4x or 6x configuration is usually adopted. The movable pulley group is suspended below the fixed pulley group and is the part that moves up and down with the lifting and lowering actions. The movable pulley group itself is a frame with pulleys, and its lowest end is equipped with a lifting assembly 250 (for hooking the ton bag 240). The number of pulleys on the movable pulley group matches the number of pulleys on the fixed pulley group.

[0045] For example, in a 4x system, there are typically two pulleys in the fixed pulley block and two pulleys in the movable pulley block.

[0046] In some embodiments, the lifting assembly 250 further includes a hook beam, and the electric hoist main unit 220 further includes a main unit frame. The main unit frame is mounted on a traveling trolley. The fixed pulley block is directly fixed to the outer shell or inner frame of the main unit frame via a rigid bracket or end plate. It is absolutely stationary (relative to the electric hoist main unit 220 itself). One end of the lifting chain 230 is fixed to the drum of the main unit frame via a pressure plate, and then winds through the fixed and movable pulley blocks according to the above path. The other end is also finally fixed at a specific point on the main unit frame. The hook beam is directly connected to the lower shaft or the lower frame of the movable pulley block. The lifting hook is installed on the hook beam. The movable pulley block, the hook beam, and the lifting hook are a whole and move up and down together. The sling of the ton bag 240 is directly hung on the lifting hook. The weight of the ton bag 240 is finally transmitted to the gantry hoist frame through the lifting hook hook beam → movable pulley block → lifting chain 230 → fixed pulley block → drum → reduction mechanism → motor / safety brake.

[0047] For example, the specific workflow of this application is as follows: A fully loaded ton bag 240 is placed on the ground in front of the equipment. The operator manually operates the lifting assembly 250 of the electric hoist, pushes open the safety lock, and securely hooks the lifting hook onto the lifting strap of the ton bag 240. Then, the safety lock is closed to prevent disengagement. Lifting and positioning (automatic start): The operator issues a command through the central control system (such as buttons on the control panel), and the lifting motor of the electric hoist starts rotating forward. Through the coupling and reduction mechanism, it drives the drum to rotate, winding the lifting chain 230. The lifting chain 230 is connected to a pulley system composed of fixed and movable pulleys for stable lifting. At a predetermined speed, the ton bag 240 is vertically lifted off the ground. Simultaneously, the second drive motor of the traveling trolley is activated, driving the entire electric hoist main unit 220 to move laterally along the track beam 210, precisely transporting the lifted ton bag 240 to directly above the feed inlet 310 of the screw feeder. After the ton bag 240 is in place, the operator (or through an automatic mechanism) opens the discharge port at the bottom of the ton bag 240, and the material begins to flow into the feed inlet 310 below by gravity. The central control system issues two commands almost simultaneously: Command 1 (to the electric hoist): Start the uniform speed controllable lowering mode. The operator presets a speed according to the material characteristics (such as humidity, viscosity, etc.) through the speed regulator. The electrical control system controls the lifting motor to reverse and the safety brake to release evenly under controlled conditions, matching the lowering speed of the ton bag 240 with the downstream production demand. This ensures that the material inside the ton bag 240 maintains constant pressure on the discharge port, achieving uniform and controllable feeding. Command 2 (to the screw feeder): Start the electric double screw feeder 330. The double screw blades begin to rotate, and their speed can be adjusted according to the feeding amount. Wet material is discharged from the ton bag 240 and flows into the feed inlet 310 of the screw feeder. The rotating double screw blades immediately take effect, grabbing the material: [The text abruptly ends here, likely due to an incomplete sentence or missing information.] The material is grasped; clumps are broken up, and the wet material is sheared and crushed to solve potential bridging problems. The material is forcibly pushed forward to the discharge port 320, completely avoiding material accumulation or blockage at the feed port 310. The material in the ton bag 240 is continuously and evenly conveyed to the discharge port 320 through the twin screw conveyor and enters subsequent equipment (such as dryer, mixer, etc.). When the material in the ton bag 240 is empty, the lifting motor of the electric hoist rotates forward to lift the empty bag to a safe height. The traveling trolley may move again to transport the empty bag back to the vicinity of the initial position. The operator removes the empty ton bag 240, and one work cycle is completed, ready for the next feeding.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

[0050] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An automatic lifting and screw conveyor feeding machine for ton bags, characterized in that, include: Gantry crane frame, electric hoist, screw feeder and central control system; The gantry hoist frame includes a multi-stage truss support base and a track beam. The track beam is rigidly connected to the top of the multi-stage truss support base. The electric hoist is slidably suspended on the track beam. A lifting assembly is vertically arranged below the electric hoist. The lifting assembly is used to hook a ton bag. The bottom of the ton bag is provided with a discharge port. The screw feeder is located below the lifting assembly. The top of one end of the screw feeder is provided with a feed inlet, and the bottom of the other end of the screw feeder is provided with a discharge outlet. The screw feeder is equipped with an electric double screw machine, and the discharge outlet at the bottom of the ton bag is located directly above the feed inlet of the screw feeder. The central control system is connected to both the electric hoist and the electric double screw conveyor.

2. The automatic lifting and screw conveyor feeding machine for ton bags according to claim 1, characterized in that, The multi-stage truss support base includes a first main support column, a second main support column, and multiple transverse connecting beams. The multiple transverse connecting beams are arranged horizontally and spaced between the first main support column and the second main support column from bottom to top. The track beam is installed on the transverse connecting beam located at the top.

3. The automatic lifting and screw conveyor feeding machine for ton bags according to claim 2, characterized in that, The multi-stage truss support base also includes multiple diagonal braces, which are respectively disposed between two adjacent transverse connecting beams.

4. The automatic lifting and screw conveyor feeding machine for ton bags according to claim 1, characterized in that, The electric hoist includes an electric hoist main unit, a lifting chain, a speed regulator, and an electrical control system. The electric hoist main unit is slidably mounted on the track beam. One end of the lifting chain is fixed and wound around the electric hoist main unit, and the other end of the lifting chain extends downward and connects to the lifting device assembly. The speed regulator is fixedly mounted on the gantry hoist frame. The electrical control system is connected to the electric hoist main unit, the speed regulator, and the central control system.

5. The automatic lifting and screw conveyor feeding machine for ton bags according to claim 4, characterized in that, The electric hoist main unit includes a traveling trolley, a lifting motor, a coupling, a reduction mechanism, and a drum. The traveling trolley is slidably mounted on the track beam. The lifting motor, the coupling, the reduction mechanism, the drum, and the speed regulator are all integrated on the traveling trolley. The lifting motor is connected to the reduction mechanism through the coupling. The drum is connected to the output end of the reduction mechanism. One end of the lifting chain is fixed and wound around the drum. The central control system is connected to the traveling trolley.

6. The automatic lifting and screw conveyor feeding machine for ton bags according to claim 5, characterized in that, The electric hoist main unit also includes a safety brake, which is located between the hoisting motor and the reduction mechanism, and is connected to the electrical control system.

7. The automatic lifting and screw conveyor feeding machine for ton bags according to claim 4, characterized in that, The lifting assembly includes a lifting hook and a safety lock, the safety lock being mounted on the lifting hook, and the other end of the lifting chain extending downward and connected to the lifting hook.

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