Ton bag filling system

Abstract

The present disclosure relates to a ton bag loading system, comprising a device support, a hopper, a discharge valve, a ton bag connecting device, a ton bag, a ton bag hook, a tray and a controller; the hopper is fixed on the device support, the discharge opening of the hopper is communicated with the ton bag connecting device through the discharge valve, and the discharge valve is controlled by the controller; the ton bag is detachably hung on the device support through the ton bag hook, and the feeding opening of the ton bag is detachably sleeved on the ton bag connecting device; the ton bag connecting device comprises a fixing mechanism for fixing the feeding opening of the ton bag, a gas vent for discharging gas in the ton bag, and a detection element arranged on the ton bag connecting device, the detection element is configured to extend into the ton bag for detecting the loading state; the signal of the detection element is input to the controller, and the controller controls the opening and closing of the discharge valve according to the signal. The system effectively solves the problems of easy falling off, material leakage and inaccurate manual judgment of the traditional ton bag, and significantly improves the connection reliability, dust removal effect and automation level.

Description

Technical Field

[0001] This disclosure relates to the field of packaging technology, and more particularly to a ton bag filling system. Background Technology

[0002] In the storage and transportation of bulk powders or granules, ton bags are widely used due to their large capacity and ease of use. Existing ton bag filling methods largely rely on manual connection or binding of the bags to the discharge port, with filling monitoring achieved through manual support and visual inspection. This method suffers from poor sealing and unstable connections. During filling, ton bags are prone to loosening due to vibration or gas accumulation, leading to spillage, environmental pollution, and operational safety issues. Furthermore, the difficulty in timely gas removal can cause bag bulging and increased stress on connections, further increasing the risk of detachment. On the other hand, manual judgment of filling status is not only labor-intensive but also limited in accuracy, especially under high-temperature, toxic, or dusty filling conditions, posing potential health hazards to operators. Existing filling systems generally lack reliable fixing mechanisms and effective detection and automatic control components, resulting in insufficient automation.

[0003] Therefore, there is a need for a ton bag filling system that can reliably fix the material, has an exhaust function, and can automatically control the material feeding according to the filling status, so as to improve operational safety and automation level. Utility Model Content

[0004] This disclosure provides a ton bag filling system to address the problems existing in the prior art.

[0005] According to a first aspect of this disclosure, a ton bag filling system is provided, including an equipment support, a hopper, a discharge valve, a ton bag connection device, a ton bag, a ton bag hook, a pallet, and a controller; The hopper is fixed on the equipment support, and the hopper's outlet is connected to the ton bag connection device through the unloading valve. The unloading valve is controlled by the controller. The ton bag is detachably suspended on the equipment bracket by the ton bag hook, and the inlet of the ton bag is detachably fitted onto the ton bag connecting device; The ton bag connecting device includes a fixing mechanism for fixing the ton bag inlet, a vent for discharging gas from the ton bag, and a detection element disposed on the ton bag connecting device, the detection element being configured to extend into the ton bag to detect the filling status. The signal from the detection element is input to the controller, which then controls the opening and closing of the discharge valve based on the signal.

[0006] In one embodiment of this disclosure, the fixing mechanism includes an openable first clamp, a second clamp, and a locking clamp. After being closed and locked, the first clamp and the second clamp are used to clamp and fix the feed inlet of the ton bag.

[0007] In one embodiment of this disclosure, the ton bag connecting device further includes an outer cylinder and an inner cylinder coaxially disposed therewith; an exhaust channel is formed between the inner cylinder and the outer cylinder, and the vent hole is connected to the exhaust channel.

[0008] In one embodiment of this disclosure, the ton bag connecting device further includes a clamp bracket and a hinge. The first clamp and the second clamp are closably mounted on the clamp bracket via the hinge, and the clamp bracket is fixedly connected to the outer cylinder.

[0009] In one embodiment of this disclosure, the ton bag connecting device further includes an adjusting bolt disposed on the clamp bracket for adjusting the hinge spacing to accommodate ton bags of different thicknesses.

[0010] In one embodiment of this disclosure, the detection element includes a level gauge and a limit switch; wherein the level gauge extends through the outer cylinder and the inner cylinder into the ton bag to detect the filling height, and the limit switch is used to detect the closed state of the first clamp and the second clamp.

[0011] In one embodiment of this disclosure, the discharge valve includes a first discharge valve and a second discharge valve connected in sequence via flanges; the first discharge valve and the second discharge valve are independently controlled by a controller to achieve two-stage discharge of coarse discharge and fine discharge.

[0012] In one embodiment of this disclosure, the lower end of the unloading valve is connected to the ton bag connection device via a flange; The discharge valve can be any one of the following: plate valve, butterfly valve, ball valve, spiral discharge valve, or star valve.

[0013] In one embodiment of this disclosure, the vent hole contains a built-in filter element to prevent the material from being discharged with the gas.

[0014] In one embodiment of this disclosure, the controller is any one of a programmable logic controller (PLC), a microcontroller, an industrial computer, or an embedded system.

[0015] One beneficial effect of this disclosure is that by arranging a hopper, unloading valve, ton bag connection device, hook, and tray on the equipment support, automatic filling of ton bags under controlled conditions is achieved. The ton bag connection device includes a fixing mechanism and vents, which can effectively expel gas from inside the bag while maintaining the airtightness of the filling and falling channel, improving the stability and safety of the filling connection. Through the coordinated action of the detection element and the controller, the unloading valve can automatically adjust its opening and closing according to the filling status of the ton bag, achieving fully intelligent control, reducing manual intervention, and lowering the risk of filling spillage and bag detachment. The overall structure is reasonable, with a high level of automation, and is suitable for widespread application.

[0016] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0018] Figure 1 This is a schematic diagram of the overall structure of a ton bag filling system provided in one embodiment of the present disclosure; Figure 2 This is a partial schematic diagram of a ton bag connecting device provided in an embodiment of the present disclosure in a closed state; Figure 3 A partial schematic diagram of the ton bag connecting device in a closed state from another angle, according to an embodiment of this disclosure; Figure 4 This is a partial schematic diagram of a ton bag connecting device provided in an embodiment of the present disclosure in the open state; Figure 5 A partial schematic diagram of the ton bag connecting device in the open state from another angle, according to an embodiment of this disclosure; Figure 6 This is a partial structural schematic diagram of a ton bag filling system provided in one embodiment of the present disclosure.

[0019] Figures 1 to 6 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows: 1. Equipment support frame; 2. Material hopper; 3. Discharge valve; 31. First discharge valve; 32. Second discharge valve; 4. Controller; 5. Ton bag hook; 51. Buckle end; 52. Hook end; 6. Ton bags; 7. Pallets; 8. Ton bag connection device; 801. Flange; 802. Outer cylinder; 803. Inner cylinder; 804. Level gauge; 805. First clamp; 806. Second clamp; 807. Clamp bracket; 808. Hinge; 809. Adjusting bolt; 810. Limit switch; 811. Locking clamp; 812. Vent hole. Detailed Implementation

[0020] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0021] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0022] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0024] The specific embodiments of this disclosure are described below with reference to the accompanying drawings.

[0025] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0026] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0027] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0028] In this disclosure, a "ton bag" (Flexible Intermediate Bulk Container, FIBC) is a large-capacity, flexible, and portable bulk material container used for loading, transporting, and storing bulk industrial raw materials, with a typical capacity of approximately 1 ton. In this disclosure, "loading" refers to bulk granular, powdery, flake, or lumpy industrial raw materials that need to be loaded into the ton bag. In this disclosure, a "hopper" refers to a container used for temporarily storing loading materials and conveying them to the ton bag via a discharge valve; it can be understood as a hopper or trough commonly used in industry, and its volume and shape can be determined according to actual loading requirements. In this disclosure, a "lifting strap" refers to a hook structure installed on the side of the ton bag and fixedly connected to it for lifting the ton bag. In this disclosure, a "pallet" refers to a support platform used to support the ton bag and facilitate forklift handling.

[0029] refer to Figure 1 The embodiment provides a ton bag filling system, including an equipment support 1, a hopper 2, a discharge valve 3, a ton bag connecting device 8, a ton bag 6, a ton bag hook 5, a pallet 7, and a controller 4.

[0030] The equipment support frame 1 forms the skeleton of the entire system and is preferably formed by welding of structural steel to ensure load-bearing strength. The hopper 2, the ton bag hook 5, and the controller 4 are all fixedly installed on the equipment support frame 1.

[0031] The hopper 2 is fixed to the upper part of the equipment support 1, and the discharge port of the hopper 2 is connected to the ton bag connection device 8 through the discharge valve 3. The discharge valve 3 is controlled by the controller 4.

[0032] The ton bag 6 is detachably suspended on the equipment bracket 1 via the ton bag hook 5, and the feed port of the ton bag 6 is detachably fitted onto the ton bag connecting device 8.

[0033] The ton bag connecting device 8 simultaneously ensures reliable fixation of the ton bag 6's inlet, timely gas discharge during filling, and real-time detection of the filling status. Specifically, the ton bag connecting device 8 includes a fixing mechanism for fixing the ton bag 6's inlet, a vent 812 for discharging gas from the ton bag 6, and a detection element mounted on the ton bag connecting device 8. The detection element is configured to extend into the ton bag 6 to detect the filling status. The signal from the detection element is input to the controller 4, which automatically controls the opening and closing of the unloading valve 3 based on the signal. This achieves a reliable, fixed ton bag filling system with venting function and automatic material discharge control based on the filling status, thereby improving operational safety and automation.

[0034] Continue to refer to Figure 1 In one embodiment of this disclosure, the equipment support 1 further includes multiple crossbeams. One end of the ton bag hook 5 is connected to the crossbeams, and the other end is connected to the ton bag 6, so as to suspend the ton bag 6 on the equipment support 1.

[0035] To ensure a precise and stable height match between the inlet of the ton bag 6 and the ton bag connecting device 8, the two ends of the ton bag hook 5 are configured as a hook end 52 with a hook structure and a snap-fit ​​end 51 with a snap-fit ​​structure. The snap-fit ​​end 51 is a straight rod structure with multi-stage teeth or threads, which passes through a through hole on the crossbeam. After being adjusted to a suitable height for the ton bag connecting device 8 and the inlet of the ton bag 6, the snap-fit ​​end 51 is fixedly connected to the crossbeam using nuts, pins, or quick-release snaps. The hook end 52 is a side-opening hook shape, which engages with the lifting handle on the outside of the ton bag 6 to securely connect the hook end 52 to the ton bag 6. Thus, during operation, simply open the fasteners and adjust the extension length of the snap-fit ​​end along the through hole to adjust the installation height of the ton bag 6. After adjustment, retighten the fasteners to ensure a more accurate and stable connection between the inlet of the ton bag 6 and the ton bag connecting device 8. The height-adjustable ton bag hook has a simple overall structure, is easy to adjust, and has reliable load-bearing capacity, significantly improving the adaptability and installation efficiency of the ton bag filling system to different ton bags.

[0036] In one embodiment of this disclosure, to achieve more convenient, safe, and efficient transfer of the full ton bag 6, the ton bag filling system further includes a pallet 7. The pallet 7 is positioned directly below the ton bag 6 to stably support the ton bag 6 in a suspended state. The upper surface of the pallet 7 is equipped with an anti-slip structure to improve overall stability during the filling process; forklift insertion holes are provided around its bottom perimeter, allowing forklifts to directly insert from the side to lift the pallet 7 together with the full ton bag 6 and transfer it to a designated location, thus eliminating the need for further lifting or disassembly of lifting straps.

[0037] In one embodiment of this disclosure, reference is also made to Figure 4 , Figure 5 The fixing mechanism includes an openable first clamp 805, a second clamp 806, and a locking clamp 811. After being closed and locked, the first clamp 805 and the second clamp 806 are used to clamp and fix the feed inlet of the ton bag 6. The first clamp 805 and the second clamp 806 are symmetrically arranged, and both can be opened and closed. In the closed state, the locking clamp 811 clamps the feed inlet of the ton bag 6 in a circumferential manner to achieve stable fixing. The locking clamp 811 includes a locking part on the first clamp 805 and a fixing part on the second clamp 806. After the first clamp 805 and the second clamp 806 are closed, the locking part and the fixing part engage, mechanically locking the clamps to remain in the closed position, thereby ensuring stable clamping of the feed inlet of the ton bag 6, which is sleeved outside the ton bag connecting device 8, during filling.

[0038] In one embodiment of this disclosure, reference is made to Figure 3 and Figure 5 The ton bag connecting device 8 includes an outer cylinder 802 and an inner cylinder 803 coaxially arranged therewith. An annular exhaust channel is formed between the inner cylinder 803 and the outer cylinder 802. A vent 812 is located on the side wall of the outer cylinder 802 and communicates with the exhaust channel, so as to timely discharge excess gas in the ton bag 6 and prevent the ton bag 6 from falling off due to excessive internal pressure. During the filling process, the material falls into the ton bag 6 through the inner cylinder 803, and the gas squeezed out of the ton bag 6 is guided upward along the annular gap between the inner cylinder 803 and the outer cylinder 802 and finally discharged through the vent 812.

[0039] In one embodiment of this disclosure, the vent 812 is constructed as a channel structure extending obliquely upward along the side wall of the outer cylinder 802, allowing the discharged gas to rise smoothly in the oblique direction, thereby reducing turbulence and backflow in the side wall area. Simultaneously, the oblique structure further prevents the material from entering the vent 812 due to rebound or lifting during its descent, thus reducing the risk of blockage and improving exhaust efficiency.

[0040] In one embodiment of this disclosure, a filter element, such as a sintered stainless steel mesh or a polytetrafluoroethylene (PTFE) membrane filter element, is disposed inside the vent 812 to filter dust particles entrained in the gas discharged from inside the ton bag 6. This structure prevents dust from escaping with the airflow, thereby improving the cleanliness of the loading environment, reducing the impact of dust on operators, and extending the service life of the filter element.

[0041] In one embodiment of this disclosure, reference is made to Figure 2 and Figure 4 The first clamp 805 and the second clamp 806 are hinged 808 and can be opened and closed on the clamp bracket 807, forming a stable integrated structure. The clamp bracket 807 is welded to the outer cylinder 802 or fixedly connected by bolts. This hinged structure makes the opening and closing of the clamps more convenient, reducing the amount of manual operation during the bagging process. At the same time, when the two clamps are closed, they form a complete ring structure, providing a uniform circumferential clamping force to the feed inlet of the ton bag 6, which helps to improve the sealing performance and connection reliability.

[0042] In one embodiment of this disclosure, the clamp bracket 807 is further provided with an adjusting bolt 809. The adjusting bolt 809 is linked to the hinge 808, and by rotating it, the range of the inner diameter of the first clamp 805 and the second clamp 806 after they are closed can be adjusted to adapt to the feed inlet of the ton bag 6 with different thicknesses and structural forms, including single-layer, double-layer flanged, or thickened leak-proof types. This adjustable structure makes the ton bag connecting device 8 suitable for various specifications of ton bags 6, improving its versatility and on-site adaptability; at the same time, it can achieve precise matching through fine-tuning when there are thickness tolerances, ensuring clamping stability and sealing effect.

[0043] In one embodiment of this disclosure, the ton bag 6 is made of any one of polyester fibers such as polypropylene and polyethylene. The inlet shape of the ton bag 6 can be any shape, such as square or round, and those skilled in the art can choose the design according to actual needs. This disclosure does not impose any restrictions here.

[0044] In one embodiment of this disclosure, reference is made to Figure 2 The detection elements specifically include a level gauge 804 and a limit switch 810. The level gauge 804 is a capacitive or ultrasonic level gauge, with its probe extending into the ton bag 6 after passing through the outer cylinder 802 and inner cylinder 803, for real-time detection of the filling height inside the ton bag 6. The limit switch 810 is installed near the clamp bracket 807 to detect whether the first clamp 805 and the second clamp 806 are fully closed. Signals from both the level gauge 804 and the limit switch 810 are connected to the controller 4. The controller 4 only allows the unloading valve 3 to open when the limit switch 810 detects that the first clamp 805 and the second clamp 806 are closed and the locking clamp 811 is locked; when the level gauge 804 detects that the filling height has reached the set full value, the controller 4 immediately closes the unloading valve 3, thereby achieving automatic and safe filling.

[0045] In one embodiment of this disclosure, the controller 4 preferably uses a Siemens S7-1200 series PLC to achieve stable and reliable industrial-grade automatic control. Of course, the controller 4 can also be replaced with a microcontroller, industrial computer, or other embedded control system to adapt to different cost requirements and field application environments. In addition to receiving signals from the level gauge 804 and limit switch 810, the controller 4 can also be expanded to connect to various peripheral devices such as weighing modules, vibrating motors, and dust cover limit switches as needed, thereby achieving higher-level automated control and logical linkage. For example, the weighing module can be used for quality verification, the vibrating motor can solve the problem of material accumulation during loading, and the dust cover limit switch can achieve safety interlock control, making the entire loading process more intelligent, precise, and safe.

[0046] In one embodiment of this disclosure, reference is made to Figure 1 and Figure 6 The discharge valve 3 includes a first discharge valve 31 and a second discharge valve 32 connected in sequence via flanges. Both the first discharge valve 31 and the second discharge valve 32 are independently controlled by the controller 4 to achieve two-stage discharge of coarse and fine discharge, thereby taking into account both discharge speed and discharge accuracy, and meeting different loading flow rates and loading requirements.

[0047] In one embodiment of this disclosure, reference continues to be made to... Figure 6 The discharge valve 3 includes a first discharge valve 31 and a second discharge valve 32 connected in sequence via flanges. Both are independently controlled by the controller 4 to achieve two-stage discharge: coarse discharge and fine discharge. The first discharge valve 31 is horizontally positioned at the bottom of the hopper 2 for rapid discharge of material, achieving initial unloading. The second discharge valve 32 is vertically positioned below the first discharge valve 31 for precise control of the discharge flow rate, achieving fine discharge and stopping when the hopper is full. This two-stage structure balances discharge speed and accuracy while facilitating valve maintenance and replacement, making it suitable for materials of different specifications and flow characteristics.

[0048] In one embodiment of this disclosure, the unloading valve 3 may be equipped with a manual control device for independently adjusting the opening and closing of the first unloading valve 31 to achieve manual unloading or emergency control, thereby enhancing the flexibility and reliability of the system while automating operations.

[0049] In one embodiment of this disclosure, reference is made to Figure 1 The lower end of the discharge valve 3 is detachably connected to the ton bag connection device 8 via flange 801. The bolt fastening structure of flange 801 allows for quick installation and disassembly between the discharge valve 3 and the ton bag connection device 8, while ensuring reliable sealing performance at the connection point.

[0050] In another embodiment of this disclosure, the discharge valve 3 can be any one of a plate valve, butterfly valve, ball valve, screw discharge valve, or rotary valve. Different types of discharge valves can be flexibly selected based on the particle size characteristics, flowability, bulk density, or on-site process requirements of the material being discharged. For example, plate valves and butterfly valves are suitable for the rapid opening and closing of general granular materials; ball valves are suitable for scenarios with high requirements for discharge accuracy and sealing; screw discharge valves can achieve stable conveying of powders with poor flowability or easy bridging; and rotary valves are suitable for scenarios requiring quantitative discharge or constant flow control. By being compatible with multiple types of discharge valves 3, this feeding system has stronger versatility and scalability in terms of applicable feeding types and operating conditions. It can be flexibly configured according to user needs or feeding characteristics, thereby improving the overall adaptability and efficiency of the system.

[0051] The workflow of this ton-bag filling system is as follows: Before the loading operation begins, the operator first installs the empty ton bag 6 onto the equipment bracket 1. Specifically, the lifting strap of the ton bag 6 is detachably attached to the ton bag hook 5 set on the equipment bracket 1. The ton bag hook 5 has a height-adjustable structure, and through the cooperation of its buckle end 51 with the crossbeam of the equipment bracket, precise alignment and fine adjustment of the ton bag 6 inlet and the ton bag connection device 8 can be achieved.

[0052] Subsequently, the inlet of the ton bag 6 is fitted onto the outer circumference of the outer cylinder 802 of the ton bag connecting device 8. The operator fastens the first clamp 805 and the second clamp 806, and secures them with the locking clamp 811 to reliably clamp the inlet of the ton bag 6. The clamp bracket 807 supports the opening and closing of the first clamp 805 and the second clamp 806 through the hinge 808, and the adjusting bolt 809 can be finely adjusted according to the thickness of the inlet of the ton bag 6 to accommodate ton bags of different specifications.

[0053] After the clamp is closed and the locking clamp 811 is engaged, the limit switch 810 is triggered, sending an installation signal to the controller 4. The controller 4 then confirms that the ton bag 6 is correctly installed, allowing the automatic loading stage to begin. For ease of subsequent handling, the pallet 7 is placed under the ton bag 6 to provide stable support and facilitate forklift transport.

[0054] After confirming that the ton bag 6 has been installed in place, the controller 4 automatically opens the unloading valve 3 according to the system settings. When a two-stage structure is adopted, the first unloading valve 31 and the second unloading valve 32 are controlled by the controller 4 to realize coarse flow and fine flow discharge respectively.

[0055] Material is fed from the hopper 2 through the unloading valve 3 and the inner cylinder 803 of the ton bag connecting device 8 into the ton bag 6. During the loading process, an exhaust channel is formed between the inner cylinder 803 and the outer cylinder 802, allowing air inside the ton bag 6 to rise along the channel and be discharged through the vent holes 812 on the side wall of the outer cylinder 802. The vent holes 812 have built-in filter elements to block dust, prevent material from overflowing with the gas, and ensure a clean working environment.

[0056] As material is continuously added, the level gauge 804 monitors the filling height inside the ton bag 6 in real time. When the level gauge 804 detects a full-fill threshold, it immediately sends a signal to the controller 4, which then closes the unloading valve 3 to achieve precise material stoppage and prevent overfilling. The system can alert the operator via an audible and visual alarm to indicate that the ton bag 6 has been filled.

[0057] After loading is complete, the operator opens the locking clamp 811, unlocks the first clamp 805 and the second clamp 806, and releases the connection between the inlet of the ton bag 6 and the ton bag connecting device 8. At this point, the ton bag 6 can be removed from the ton bag connecting device 8. Finally, the forklift can directly pick up the pallet 7 located at the bottom and transfer the full ton bag 6 to the designated storage location, thereby significantly improving the overall operating efficiency, automation level, and operational safety of the entire ton bag loading system.

[0058] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A ton bag filling system, characterized in that, Includes equipment support (1), hopper (2), unloading valve (3), ton bag connection device (8), ton bag (6), ton bag hook (5), pallet (7) and controller (4); The hopper (2) is fixed on the equipment support (1), and the outlet of the hopper (2) is connected to the ton bag connecting device (8) through the unloading valve (3). The unloading valve (3) is controlled by the controller (4). The ton bag (6) is detachably suspended on the equipment bracket (1) by the ton bag hook (5), and the feed port of the ton bag (6) is detachably fitted onto the ton bag connecting device (8); The ton bag connecting device (8) includes a fixing mechanism for fixing the feed inlet of the ton bag (6), a vent (812) for discharging gas from the ton bag (6), and a detection element disposed on the ton bag connecting device (8), the detection element being configured to extend into the ton bag (6) to detect the loading status. The signal from the detection element is input to the controller (4), and the controller (4) controls the opening and closing of the unloading valve (3) according to the signal.

2. The ton bag filling system according to claim 1, characterized in that, The fixing mechanism includes an openable first clamp (805), a second clamp (806), and a locking clamp (811). The first clamp (805) and the second clamp (806) are used to clamp and fix the feed port of the ton bag (6) after being closed and locked.

3. The ton bag filling system according to claim 2, characterized in that, The ton bag connecting device (8) further includes an outer cylinder (802) and an inner cylinder (803) coaxially arranged therewith; an exhaust channel is formed between the inner cylinder (803) and the outer cylinder (802), and the vent hole (812) is connected to the exhaust channel.

4. The ton bag filling system according to claim 3, characterized in that, The ton bag connecting device (8) further includes a clamp bracket (807) and a hinge (808). The first clamp (805) and the second clamp (806) are detachably mounted on the clamp bracket (807) via the hinge (808). The clamp bracket (807) is fixedly connected to the outer cylinder (802).

5. The ton bag filling system according to claim 4, characterized in that, The ton bag connecting device (8) also includes an adjusting bolt (809), which is disposed on the clamp bracket (807) and is used to adjust the spacing of the hinge (808) to accommodate ton bags (6) of different thicknesses.

6. The ton bag filling system according to claim 5, characterized in that, The detection elements include a level gauge (804) and a limit switch (810); wherein the level gauge (804) extends into the ton bag (6) through the outer cylinder (802) and the inner cylinder (803) to detect the filling height, and the limit switch (810) is used to detect the closed state of the first clamp (805) and the second clamp (806).

7. The ton bag filling system according to any one of claims 1-6, characterized in that, The discharge valve (3) includes a first discharge valve (31) and a second discharge valve (32) connected in sequence by flanges; the first discharge valve (31) and the second discharge valve (32) are independently controlled by the controller (4).

8. The ton bag filling system according to claim 7, characterized in that, The lower end of the unloading valve (3) is connected to the ton bag connecting device (8) via a flange (801); The discharge valve (3) is any one of a plate valve, butterfly valve, ball valve, spiral discharge valve or star discharge valve.

9. The ton bag filling system according to any one of claims 1-6, characterized in that, A filter element is provided inside the vent hole (812), and the filter element is either a stainless steel sintered mesh or a polytetrafluoroethylene membrane filter element.

10. The ton bag filling system according to any one of claims 1-6, characterized in that, The controller (4) can be any one of a programmable logic controller (PLC), a microcontroller, an industrial computer, or an embedded system.

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