A full-automatic ton bag unpacking machine capable of preventing inner bag from falling off

Abstract

The application discloses a kind of prevent inner bag to fall off full-automatic ton bag unpacking machine, including main frame, grab bag mechanism, shift mechanism, control unit, unpacking unloading mechanism;Main frame is divided into vertical bracket structure and truss track structure, bracket structure fixed installation dust collector and unpacking mechanism;Shift mechanism includes shift track fixed on truss track structure, shift motor is equipped on shift platform, and shift motor drives shift platform reciprocating motion on shift track;Grab bag mechanism and shift platform are connected by scissor lifting mechanism, and scissor lifting mechanism drives grab bag mechanism to realize linear motion in vertical direction, and grab bag mechanism includes ton bag clamping plate, bag top clamping mechanism, bag supporting mechanism and auxiliary holding mechanism;Unpacking unloading mechanism is provided with detachable bag breaking cone knife.The application improves the automation and intelligent degree of ton bag unpacking equipment and the safety of on-site operation.

Description

Technical Field

[0001] This invention belongs to the field of automatic unpacking technology, and in particular relates to an automatic ton bag unpacking machine that prevents the inner bag from falling off. Background Technology

[0002] Ton bag unpacking machines are used to break open and unload materials packaged in ton bags, thereby reducing the workload of on-site workers, improving the working environment, and enhancing automation and efficiency. Common ton bag unpacking machines require manual hook-up, with a hoist lifting the ton bag to the unpacking position for manual operation. While this method improves the working environment and reduces dust levels to some extent, it doesn't substantially reduce the workload. On-site workers still need to perform tasks such as hanging the bags and collecting waste bags, resulting in low automation. Furthermore, workers are still exposed to residual dust during waste bag collection.

[0003] For materials that are prone to moisture and clumping, ton bags are often equipped with inner polyethylene film bags to prevent material leakage and isolate moisture. During the unpacking process of ton bags, because the inner bag is lightweight and not attached to the outer bag, it often falls along with the material inside. The elongated inner bag can not only block the discharge port and hinder the further descent of material, affecting unpacking efficiency, but in some cases, the inner bag may also enter critical devices such as rotary feeders along with the material, causing the main shaft of rotating parts to seize and resulting in equipment damage. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a fully automatic ton bag unpacking machine to prevent inner bag detachment. This invention primarily aims to solve the problems of inner bag detachment and automated waste bag collection in existing unpacking machine technologies, thereby improving the reliability and automation level of the equipment. To achieve the objectives of this invention, the following technical solution is adopted:

[0005] An automatic ton bag unpacking machine for preventing inner bag detachment, the ton bag unpacking machine includes a main frame, a bag gripping mechanism, a transfer mechanism, a dust removal unit, a control unit, and a bag unpacking and unloading mechanism;

[0006] The main frame is divided into vertical brackets and truss tracks. The vertical brackets are used to fix and install dust collectors and unpacking mechanisms.

[0007] The transfer mechanism includes a transfer track and a transfer platform fixed on the truss track. The transfer platform is equipped with a transfer motor, which drives the transfer platform to reciprocate on the transfer track.

[0008] The bag-grabbing mechanism and the transfer platform are connected by a scissor lift mechanism. The scissor lift mechanism drives the bag-grabbing mechanism to achieve linear motion in the vertical direction. The bag-grabbing mechanism includes a ton bag clamping plate, a bag top clamping mechanism, a bag supporting mechanism, and an auxiliary clamping mechanism.

[0009] The unpacking and unloading mechanism consists of a bag-breaking cone cutter, a hopper, and a rotary feeder.

[0010] The bag top clamping mechanism is driven by a bag top clamping mechanism drive cylinder. After the bag grabbing mechanism positions and grabs the ton bag, the bag top clamping mechanism drive cylinder moves to drive the bag top clamping mechanism gripper to fix the top of the ton bag.

[0011] The bag-supporting mechanism is equipped with a retractable baffle. The baffle is driven by an electromagnetic coil. After the bag-supporting mechanism inserts the ton bag into a fixed position, the electromagnetic coil receives an energizing signal from the control unit and pulls the baffle out, thus fixing and clamping the inner bag and outer bag of the ton bag.

[0012] The auxiliary clamping mechanism is installed on the ton bag clamping plate and driven by an auxiliary cylinder. While the main cylinder drives the ton bag clamping plate to clamp the ton bag tightly, the auxiliary cylinder of the auxiliary clamping mechanism moves to drive the gripper of the auxiliary clamping mechanism to penetrate the ton bag.

[0013] Furthermore, a weighing sensor is installed between the bag-grabbing mechanism and the scissor lift mechanism. The weighing sensor detects the weight of the material in the ton bag and transmits the signal to the control unit. After the weight signal reaches the set threshold, the control unit issues a command to drive the main cylinder to drive the ton bag clamp to continuously beat the ton bag, promoting the falling of the residual material inside.

[0014] Furthermore, a level sensor is installed inside the hopper, and the hopper is connected to a rotary feeder. The rotary feeder receives the output signal from the level sensor and adjusts its own operating speed and switching time.

[0015] Furthermore, a waste bag collection device fixed to the main frame is installed between the bag grabbing station and the unpacking area. The waste bag collection device is equipped with a photoelectric sensor on the upper part to count the number of waste bags collected. A waste bag collection port is set on the outside of the waste bag collection device. After the count reaches the processing quantity, the built-in packaging mechanism performs simple packaging of the waste bags inside and the packaged waste bags are pushed out of the collection port by the cylinder.

[0016] Furthermore, guide plates are installed on both sides of the belt conveyor, and the guide plates gradually narrow along the belt conveying direction. Rolling pulleys are installed on the inner side of the guide plates, and contact limit switches are installed at the end of the ton bag grabbing station on the belt conveyor.

[0017] Furthermore, the transfer track is built on a truss structure, spanning the bag grabbing station, the waste bag collection station, and the unpacking and unloading station. Limit protection switches are installed at both ends of the transfer track.

[0018] Furthermore, the two ends of the main cylinder are hinged to both sides of the clamping plate.

[0019] The beneficial effects of this invention are as follows:

[0020] (1) The automatic ton bag unpacking machine for preventing inner bag from falling off, as described in this invention, improves the automation and intelligence of the ton bag unpacking equipment to a certain extent. The entire working process of the equipment requires very few human interventions, and basically realizes a fully automated workflow, effectively reducing the workload of on-site staff and improving the safety of the operation.

[0021] (2) This invention is also very applicable to ton bag materials with inner bags. The bag gripping mechanism is designed and installed with multiple mechanisms to prevent the inner bags from falling off. By gripping the upper part of the ton bag, fixing the shoulder, and stretching the lower part, the problem of the inner bag falling off is effectively avoided, making the equipment more versatile. Attached Figure Description

[0022] Figure 1 This is a front view of the fully automatic ton bag unpacking machine for preventing inner bag detachment according to the present invention;

[0023] Figure 2 This is a side view of the fully automatic ton bag unpacking machine for preventing inner bag detachment in this invention;

[0024] Figure 3 This is a schematic diagram of the overall structure of the bag-grabbing mechanism in this invention;

[0025] Figure 4 This is a schematic diagram of the top clamping mechanism for the ton bag in this invention;

[0026] Figure 5 This is a schematic diagram of the auxiliary clamping mechanism at the bottom of the ton bag in this invention;

[0027] Figure 6 This is a schematic diagram of the shoulder support mechanism of the ton bag in this invention.

[0028] The components include: 1. Transfer track; 2. Main frame; 3. Belt conveyor; 4. Waste bag collection device; 5. Scissor lift mechanism; 6. Dust collector; 7. Bag top clamping mechanism; 8. Bag support mechanism; 9. Auxiliary clamping mechanism; 10. Ton bag clamping plate; 11. Bag breaking cone knife; 12. Hopper; 13. Rotary feeder; 14. Transfer platform; 15. Transfer motor; 16. Pneumatic conveying pipeline; 17. Main cylinder; 18. Bag top clamping mechanism gripper; 19. Bag top clamping mechanism drive cylinder; 20. First connecting piece; 21. Auxiliary cylinder; 22. Cylinder gripper coupling; 23. Clamping plate connecting piece; 24. Auxiliary clamping mechanism gripper; 25. Baffle plate; 26. Upper electromagnetic coil; 27. Slider; 28. Lower electromagnetic coil; 29. ​​Power supply cable. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] like Figures 1-6 The above describes a fully automatic ton bag unpacking machine that prevents inner bag from falling off. The ton bag unpacking machine includes a main frame 2, a bag gripping mechanism, a transfer mechanism, a dust removal unit, a control unit, and a bag unpacking and unloading mechanism.

[0031] The main frame 2 is divided into a vertical bracket and a truss track. The vertical bracket is used to fix and install the dust collector 6 and the unpacking mechanism. The main frame is the main frame of the equipment and is the basic structure for the installation of the equipment.

[0032] The transfer mechanism includes a transfer track 1 fixed on a truss track and a transfer platform 14. A transfer motor 15 is mounted on the transfer platform 14, driving the transfer platform 14 to reciprocate along the transfer track 1. Optionally, the transfer track 1 can be a linear track with a rack arranged along it. The rotor of the transfer motor 15 has gears meshing with the rack. The transfer motor 15 is a stepper motor; by rotating forward and reverse, the entire transfer platform 14 is driven to reciprocate along the rack. Since the number of steps of the stepper motor is controllable, the position of the transfer platform 14 on the transfer track 1 can be controlled relatively accurately without losing steps. It should be noted that the above description is only one option for implementing the present invention, and the present invention does not specifically limit the structure of the transfer track 1 and the transfer platform 15.

[0033] The bag-grabbing mechanism and the transfer platform 14 are connected by a scissor lift mechanism 5. The scissor lift mechanism 5 drives the bag-grabbing mechanism to achieve linear motion in the vertical direction. The bag-grabbing mechanism includes a ton bag clamping plate 10, a bag top clamping mechanism 7, a bag supporting mechanism 8, and an auxiliary clamping mechanism 9. The entire bag-grabbing mechanism is mounted on a sub-frame, such as... Figure 3 As shown, a steel frame is fixed to the back of the ton bag clamp 10, and the steel frame is hinged to the sub-frame. The bag top clamping mechanism 7 and the bag supporting mechanism 8 are also installed on the sub-frame.

[0034] The structure of the bag top clamping mechanism 7 is as follows: Figure 4As shown. The tail end of the bag top clamping mechanism drive cylinder 19 is fixed to the sub-frame, and its push rod is connected to the bag top clamping mechanism gripper 18 via a hinge. A first connecting piece 20 is also fixed to the sub-frame, which is connected to a rotating rod via a bearing. The rotating rod is connected to the bag top clamping mechanism gripper 18. When the bag top clamping mechanism drive cylinder 19 is activated, it will push the bag top clamping mechanism gripper 18 to move around a circle centered on the rotating rod (the movement trajectory is an arc). The bag top clamping mechanism gripper 18 can extend outward to grasp the ton bag, and conversely, it can retract backward to release the ton bag. The bag top clamping mechanism gripper 18 is driven by the bag top clamping mechanism drive cylinder 19. After the bag grabbing mechanism positions and grabs the ton bag, the bag top clamping mechanism drive cylinder 19 moves to drive the bag top clamping mechanism gripper 18 to fix the top of the ton bag. The bag top clamping mechanism 7 is connected to the main frame 2 of the bag grabbing mechanism through the first connector 20. The bag top clamping mechanism drive cylinder 19 drives the bag top clamping mechanism grippers 18 on both sides of the bag grabbing mechanism to hug towards the center. The grippers on both sides are staggered, which can grab the top of the ton bag from multiple directions, improving the success rate of the grabbing action.

[0035] The bag-supporting mechanism 8 is equipped with an automatically retractable baffle 25. The baffle 25 is driven by an electromagnetic coil. After the bag-supporting mechanism 8 inserts the ton bag into a fixed position, the electromagnetic coil receives an energizing signal from the control unit and engages, causing the baffle 25 to pop out, thus clamping the inner and outer bags of the ton bag together. Figure 6 As shown, when the power supply cable 29 is energized, a magnetic field is formed around the upper electromagnetic coil 26 and the lower electromagnetic coil 28. The slider 27 is equipped with a magnet to control the direction of energization, so that the slider 27 is subjected to a downward or upward magnetic force. When the direction of the magnetic force is upward, the slider 27 moves upward, thereby causing the baffle 25 to extend. When the direction of the magnetic force is downward, the slider 27 moves downward, thereby causing the baffle 25 to retract.

[0036] The auxiliary clamping mechanism 9 is mounted on the ton bag clamping plate 10 and is driven by the auxiliary cylinder 21. Figure 5As shown, the tail of the auxiliary cylinder 21 and the clamping plate connector 23 are both fixed to the steel frame on the back of the ton bag clamping plate 10. The push rod of the auxiliary cylinder 21 is connected to the auxiliary clamping mechanism gripper 24 through the cylinder gripper coupling 22, which is a hinge structure. The auxiliary clamping mechanism gripper 24 is movably connected to the clamping plate connector 23. When the auxiliary cylinder 21 is activated, it pushes the auxiliary clamping mechanism gripper 24 to extend or retract. While the main cylinder 17 drives the ton bag clamping plate 10 to clamp the ton bag, the auxiliary cylinder 21 of the auxiliary clamping mechanism 9 is activated, causing the auxiliary clamping mechanism gripper 24 to penetrate the ton bag. The auxiliary clamping gripper 24 is connected to the clamping plate connector 23 through a bearing. When the auxiliary cylinder 21 pushes the auxiliary clamping gripper 24 to move, the tip of the auxiliary clamping gripper 24 will protrude from the surface of the ton bag clamping plate 10. The auxiliary clamping gripper 24 can fix the lower part of the ton bag and increase the support force required for the gripping action.

[0037] A weighing sensor is installed between the bag-grabbing mechanism and the scissor lift mechanism 5. The weighing sensor detects the weight of the material in the ton bag and transmits the signal to the control unit. Once the weight signal reaches a set threshold, the control unit issues a command to cause the main cylinder 17 to drive the ton bag clamp 10 to continuously beat the ton bag, promoting the falling of residual material inside. Preferably, four 750-type weighing sensors are used. They are installed between the bag-grabbing mechanism and the scissor lift mechanism 5, arranged at the four corners of the sub-frame. The weighing sensors detect the weight of the material in the ton bag and transmit the signal to the control unit. The program sets different thresholds for the beating action and transfer action of ton bags with and without inner bags. Compared to ton bags without inner bags, ton bags with inner bags have a relatively larger amount of residual material inside due to the adhesion of the inner film. According to the set control algorithm, after the weight signal reaches the threshold set for tapping, the main cylinder 17 drives the ton bag clamp 10 to continuously tap the ton bag, promoting the falling of the internal residual material. When the residual amount reaches the qualified range of unloading residual amount, the transfer platform 14 drives the bag grabbing mechanism to move towards the waste bag collection station. The original verification value of the ton bag material is calculated from the time the bag grabbing mechanism grabs the ton bag material to the specified height at the grabbing position. The method of extracting the average value through multiple collections is used to reduce random errors.

[0038] The unpacking and unloading mechanism consists of a bag-breaking conical blade 11, a hopper 12, and a rotary feeder 13. A pneumatic conveying pipe 16 is located below the rotary feeder 13, conveying the material to the storage bin via positive pressure pneumatics. Preferably, the bag-breaking conical blade has a cross-shaped conical structure, composed of four sets of tool steel blades, with a spiked structure added to the head for easy breaking of ton bags. The bag-breaking conical blade 11 in the unpacking and unloading mechanism adopts a detachable design, with a blade mounting groove on the main frame, and a positioning pin at the top of the groove to fix the blade to the groove.

[0039] The dust removal unit 6 is installed above the vertical frame. During the unpacking process, it adsorbs dust in the unpacking area, reduces the dust content on site, improves the on-site working environment, and ensures the environmental friendliness of on-site operations.

[0040] A level sensor is installed inside the hopper 12. The hopper 12 is connected to the rotary feeder 13. The rotary feeder 13 receives the output signal from the level sensor and adjusts its own operating speed and switching time.

[0041] A waste bag collection device 4, fixed to the main frame, is installed between the bag-grabbing station and the unpacking area. The waste bag collection device 4 is equipped with a photoelectric sensor to count the number of waste bags collected. A waste bag collection port is located on the outside of the device. Once the count reaches the required quantity, an internal packaging mechanism performs simple packaging of the waste bags, and a cylinder pushes the packaged bags out of the collection port. After the waste bags fall, a weighing sensor detects the change in weight signal and feeds the signal back to the control unit. The transfer platform 14 then drives the motor to move the bag-grabbing mechanism to the grabbing position to begin the next unpacking cycle.

[0042] Guide plates are installed on both sides of the belt conveyor 3. The guide plates gradually narrow along the belt conveying direction. Rolling pulleys are installed on the inner side of the guide plates. A contact-type limit switch is installed at the end of the ton bag grabbing station on the belt conveyor 3. Preferably, the guide plates are of the double guardrail type, the distance between the plates is adjustable, and the height is consistent with the ton bag. Its function is to control the shape of the ton bag, so as to facilitate the grabbing mechanism to grab the ton bag. The contact-type limit switch is located at the end of the belt conveyor 3. After the switch contact touches the ton bag, it sends a positioning signal to the control unit, the belt conveyor 3 stops running, and the grabbing mechanism and scissor lift mechanism 5 start the grabbing process.

[0043] The transfer track 1 is built on a truss structure, spanning the bag grabbing station, the waste bag collection station, and the unpacking and unloading station. Limit protection switches are installed at both ends of the transfer track 1.

[0044] The two ends of the main cylinder 17 are hinged to both sides of the clamping plate 10.

[0045] Example 1:

[0046] The following describes the steps for using this equipment to break open ton bags, with examples provided.

[0047] S1: The ton bag is transported to the bag grabbing station located at the end of the belt conveyor 3 via the belt conveyor 3, and the contact limit switch is triggered, and the belt conveyor 3 stops running.

[0048] S2: After the bag-grabbing mechanism moves along the transfer track 1 to directly above the bag-grabbing station, the scissor lift mechanism 5 drives the bag-grabbing mechanism to descend, opening the ton bag clamp 10 and the auxiliary clamping mechanism 9 to grab the ton bag. The bag-supporting mechanism 8 has a gripper and is structurally connected to the ton bag clamp 10. While the ton bag clamp 10 grips the ton bag tightly, it also pierces into the ton bag. After the ton bag is grabbed, the belt conveyor 3 resumes operation, and if another ton bag reaches the end of the belt and triggers the limit switch, the belt conveyor 3 stops operating again.

[0049] S3: The scissor lift mechanism 5 drives the bag grabbing mechanism to rise. After rising, the bag grabbing mechanism moves along the transfer track 1 to the area above the unpacking area.

[0050] S4: The scissor lift mechanism 5 drives the bag grabbing mechanism to descend and gradually approach the bag breaking cone 11. The bag breaking cone 11 punctures the ton bag, and the material gradually falls from the ton bag into the hopper 12. As the weight of the remaining material reaches a certain value, the main cylinder 17 drives the ton bag clamp to continuously beat the ton bag, promoting the falling of the internal residual material.

[0051] S5: After the weight detection determines that the material has been completely poured out, the scissor lift mechanism 5 rises again and brings the bag grabbing mechanism to the top of the waste bag collection device 4 along the transfer track 1. The ton bag clamp 10 opens, the bag top clamping mechanism grabber 18 opens, and the auxiliary clamping mechanism grabber 24 retracts and no longer protrudes from the surface of the ton bag clamp. After losing the fixation of the grabber, the waste bag falls into the waste bag collection box under the action of gravity. After the sensor in the waste bag collection box detects the position signal of the waste bag, it will push the waste bag into the packing area. The waste bag collection port is set on the outside of the waste bag collection device. After the count reaches the processing quantity, the built-in packing mechanism performs simple packing of the waste bags inside and the cylinder pushes the packed waste bags out of the collection port.

[0052] S6: If there is a ton bag at the grab position, the system will continue to repeat the above process.

[0053] The accompanying drawings in this invention are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0054] Although embodiments of the present invention have been shown and described above, 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fully automatic ton bag unpacking machine to prevent inner bag from falling off, characterized in that, The ton bag unpacking machine includes a main frame (2), a bag gripping mechanism, a transfer mechanism, a dust removal unit, a control unit, and a bag unpacking and unloading mechanism; The main frame (2) is divided into vertical brackets and truss tracks. The vertical brackets are used to fix and install dust collectors (6) and unpacking mechanisms. The transfer mechanism includes a transfer track (1) fixed on a truss track and a transfer platform (14). A transfer motor (15) is provided on the transfer platform (14), and the transfer motor (15) drives the transfer platform (14) to reciprocate on the transfer track (1). The bag grabbing mechanism and the transfer platform (14) are connected by a scissor lift mechanism (5). The scissor lift mechanism (5) drives the bag grabbing mechanism to achieve linear motion in the vertical direction. The bag grabbing mechanism includes a ton bag clamp (10), a bag top clamping mechanism (7), a bag supporting mechanism (8), and an auxiliary clamping mechanism (9). The unpacking and unloading mechanism consists of a bag-breaking cone cutter (11), a hopper (12), and a rotary feeder (13); The bag top clamping mechanism (7) is driven by the bag top clamping mechanism drive cylinder (19). After the bag grabbing mechanism positions and grabs the ton bag, the bag top clamping mechanism drive cylinder (19) moves to drive the bag top clamping mechanism gripper (18) to fix the top of the ton bag. The bag-supporting mechanism (8) is equipped with a retractable baffle (25). The baffle (25) is driven by an electromagnetic coil. After the bag-supporting mechanism (8) inserts into the shoulder of the ton bag to a fixed position, the electromagnetic coil receives the power signal from the control unit and pulls the baffle (25) to pop out, thus fixing and clamping the inner bag and outer bag of the ton bag. The auxiliary clamping mechanism (9) is installed on the ton bag clamping plate (10) and driven by the auxiliary cylinder (21). While the main cylinder (17) drives the ton bag clamping plate (10) to clamp the ton bag, the auxiliary cylinder (21) of the auxiliary clamping mechanism (9) moves to drive the auxiliary clamping mechanism gripper (24) to penetrate the lower part of the ton bag.

2. The fully automatic ton bag unpacking machine for preventing inner bag detachment according to claim 1, characterized in that: A weighing sensor is provided between the bag grabbing mechanism and the scissor lift mechanism (5). The weighing sensor detects the weight of the material in the ton bag and transmits the signal to the control unit. After the weight signal reaches the set threshold, the control unit issues a command to make the main cylinder (17) drive the ton bag clamp (10) to continuously beat the ton bag, promoting the falling of the internal residual material.

3. The fully automatic ton bag unpacking machine for preventing inner bag detachment according to claim 1, characterized in that: A level sensor is installed inside the hopper (12). The hopper is connected to the rotary feeder (13). The rotary feeder (13) receives the output signal from the level sensor and adjusts its own operating speed and switching time.

4. The fully automatic ton bag unpacking machine for preventing inner bag detachment according to claim 1, characterized in that: A waste bag collection device (4) fixed to the main frame is provided between the bag grabbing station and the unpacking area. The waste bag collection device (4) is equipped with a photoelectric sensor on the upper part to count the number of waste bags collected. A waste bag collection port is set on the outside of the waste bag collection device (4). After the count reaches the processing quantity, the built-in packaging mechanism performs simple packaging of the waste bags inside and the packaged waste bags are pushed out of the collection port by the cylinder.

5. The fully automatic ton bag unpacking machine for preventing inner bag detachment according to claim 1, characterized in that: Guide plates are installed on both sides of the belt conveyor (3). The guide plates gradually narrow along the belt conveying direction. Rolling pulleys are installed on the inner side of the guide plates. A contact limit switch is set at the end of the ton bag grabbing station on the belt conveyor (3).

6. The fully automatic ton bag unpacking machine for preventing inner bag detachment according to claim 1, characterized in that: The transfer track (1) is built on the truss structure, spanning the bag grabbing station, the waste bag collection station and the unpacking and unloading station. Limit protection switches are installed at both ends of the transfer track (1).

7. The fully automatic ton bag unpacking machine for preventing inner bag detachment according to claim 1, characterized in that: The two ends of the main cylinder (17) are hinged to the two sides of the clamping plate (10).

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