Anti-pinch bag device for a bale breaker

Abstract

The utility model belongs to material conveying technical field discloses a kind of bag clamping prevention devices for unpacking machine, including the rack of unpacking machine, the outlet end of rack is connected with roller through bearing, the outlet end of roller is communicated with bag pressing cylinder, bag pressing cylinder cylinder top seals, and the upper side of bag pressing cylinder cylinder is equipped with protruding part, protruding part is communicated to the outlet end of roller, and infrared photoelectric sensor is equipped at the lower part of protruding part connected to bag pressing cylinder cylinder;Hydraulic cylinder is connected on the upper part of bag pressing cylinder cylinder, and the cylinder body of hydraulic cylinder is arranged above the cylinder of bag pressing cylinder, and the pressing plate arranged in the cylinder of bag pressing cylinder is communicated to by piston rod;Bag pressing cylinder cylinder lower end is open, and bag pressing platform is equipped below bag pressing cylinder cylinder, and bag pushing vertical plate is arranged between bag pressing cylinder cylinder lower end and bag pressing platform, and bag pushing cylinder is equipped on the side of bag pushing vertical plate close to roller;Conveying belt is equipped on the end of bag pressing platform away from roller.The utility model guarantees the continuity of unpacking procedure, and improves production efficiency and equipment service life.

Description

Technical Field

[0001] This utility model belongs to the field of material conveying technology, specifically relating to an anti-pinch bag device for a bag unpacking machine. Background Technology

[0002] In starch processing, food production, and the chemical industry, powdery materials are typically packaged in woven bags or composite film woven bags. Automated unpacking machines, as key equipment at the front end of the production line, function by using rotating rollers and cutting tools to break open the packaging bags. The rollers then separate the empty bags from the material and transport the material to the next processing step. The empty bags exit the rollers and enter a conveyor belt, where they are transported away. However, existing unpacking machines generally suffer from the following technical defects in actual operation:

[0003] In the area from the roller exit to the conveyor belt connection, due to the high toughness of the bag material (such as polypropylene woven bags), the empty bags after being broken are prone to folding and tangling due to inertia or airflow. This can cause the bag to be partially clamped in the gap between the conveyor belt or at the junction of the roller and the conveyor belt, resulting in equipment jamming or even shutdown and damage to the equipment.

[0004] Existing technologies alleviate bag clamping problems by reducing conveyor belt speed, but this leads to a decrease in throughput per unit time, failing to meet the high-efficiency requirements of modern production lines and creating a prominent contradiction between production efficiency and equipment stability. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide an anti-pinch bag device for a bag unpacking machine, which overcomes the defects of the prior art, can actively intervene in the movement trajectory of the bag, dynamically adapt to different working conditions, ensure the continuity of the unpacking process, and improve production efficiency and equipment service life.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] An anti-pinch bag device for a bag-unpacking machine includes a frame of the bag-unpacking machine. A roller is connected to the outlet end of the frame via a bearing. A bag-pressing cylinder is connected to the outlet end of the roller. The top of the bag-pressing cylinder is sealed. A protrusion is provided on one side of the upper part of the bag-pressing cylinder, connecting to the outlet end of the roller. An infrared photoelectric sensor is located at the lower part of the protrusion, connected to the body of the bag-pressing cylinder. A hydraulic cylinder is connected to the upper part of the bag-pressing cylinder, with its cylinder body positioned above the cylinder and connected to a pressure plate inside the cylinder via a piston rod. The lower end of the bag-pressing cylinder is open. A bag-pressing platform is located below the cylinder. A bag-pushing upright plate is positioned between the lower end of the bag-pressing cylinder and the bag-pressing platform. A bag-pushing cylinder is located on the side of the bag-pushing upright plate near the roller. A conveyor belt is located at the end of the bag-pressing platform away from the roller, driven by a drive device. The drive device of the conveyor belt, the infrared photoelectric sensor, the hydraulic cylinder, and the bag-pushing cylinder are all electrically connected to a PLC automatic control system.

[0008] Preferably, the tube of the bag-pressing cylinder is a cylindrical tube.

[0009] Preferably, the lower part of the protruding portion of the bag-pressing cylinder is angled downwards from the roller outlet end, with the angle being 15°-30°. This facilitates the downward sliding of empty bags.

[0010] Preferably, the infrared photoelectric sensor is an Autonics BR20M-TDTL through-beam photoelectric sensor (Korea).

[0011] Preferably, the hydraulic cylinder is a YUKEN CJT125L-70-FE21B series hydraulic cylinder from Japan.

[0012] Preferably, the hydraulic cylinder is equipped with a pressure sensor. The pressure sensor is electrically connected to the PLC automatic control system. The pressure sensor is an EB100 series miniature pressure sensor manufactured by TE Connectivity.

[0013] Preferably, the bottom panel of the pressure plate is provided with several anti-slip grooves evenly distributed.

[0014] Preferably, the distance between the lower end of the cylinder and the bag-pressing platform is 100mm, and the height of the bag-pushing upright plate is 90mm-95mm. This facilitates the transport of the compressed bags to subsequent processes.

[0015] Preferably, the push-bag cylinder is a DSNU-S series cylinder, provided by Festo (China) Co., Ltd.

[0016] Preferably, the PLC automatic control system is a Siemens S7-1200 series (CPU1214C) PLC controller, with an external PLC controller enclosure; power supply module: PS 1207, 24V DC; CPU: 1214C, integrated with 14 inputs / 10 outputs, supporting PROFINET communication; signal module: SM 1223, digital input / output module (expandable); capable of infrared sensor signal acquisition and processing, hydraulic cylinder action logic control (the pressure plate lifts when the bag mouth passes through, and the pressure plate tightens after the material passes through), and linkage control of the conveyor belt and rollers.

[0017] Furthermore, the PLC automatic control system is also equipped with a buzzer and LED indicator lights, both of which are located outside the control box of the PLC automatic control system.

[0018] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0019] This invention, by adding a bag-pressing cylinder, hydraulic cylinder, bag-pressing platform, bag-pushing upright plate, and bag-pushing cylinder, compresses the empty bags after unpacking, reducing their volume to about one-third and changing their shape. After compression, the bags are flatter and tighter, no longer folding or tangling due to inertia or airflow. This prevents the bags from being partially clamped in the gaps of the conveyor belt or at the junction of the roller and the conveyor belt, thus solving the problem of equipment jamming or even shutdown caused by these factors and ensuring the continuity of production.

[0020] In summary, this utility model ensures the continuity of the unpacking process and improves production efficiency and equipment lifespan. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the PLC automatic control system according to Embodiment 1 of this utility model;

[0023] In the diagram, 1. Frame; 2. Roller; 3. Bag pressing cylinder; 4. Protrusion; 5. Infrared photoelectric sensor; 6. Hydraulic cylinder; 7. Piston rod; 8. Pressure plate; 9. Anti-slip texture; 10. Bag pressing platform; 11. Bag pushing upright plate; 12. Bag pushing cylinder; 13. Conveyor belt; 14. PLC automatic control system; 141. PLC controller housing; 142. Buzzer; 143. LED indicator light. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example 1:

[0026] like Figure 1 and Figure 2As shown, an anti-pinch bag device for a bag-opening machine includes a frame 1 of the bag-opening machine (not shown). A roller 2 is connected to the outlet end of the frame 1 via a bearing (not shown). The outlet end of the roller 2 is connected to a bag-pressing cylinder 3. The top of the bag-pressing cylinder 3 is sealed. A protrusion 4 is provided on one side of the upper part of the bag-pressing cylinder 3, connecting to the outlet end of the roller 2. An infrared photoelectric sensor 5 is provided at the lower part of the protrusion 4 where it connects to the body of the bag-pressing cylinder 3. A hydraulic cylinder 6 is connected to the upper part of the bag-pressing cylinder 3, and a pressure sensor (not shown) is provided inside the hydraulic cylinder 6. The cylinder body of the hydraulic cylinder 6 is located above the body of the bag-pressing cylinder 3 and is connected to a pressure plate 8 located inside the body of the bag-pressing cylinder 3 via a piston rod 7. Several anti-slip grooves 9 are evenly distributed on the bottom surface of the pressure plate 8. The lower end of the cylinder is open, and a bag-pressing platform 10 is provided below the cylinder of the bag-pressing cylinder 3. A bag-pushing upright plate 11 is provided between the lower end of the cylinder of the bag-pressing cylinder 3 and the bag-pressing platform 10. A bag-pushing cylinder 12 is provided on the side of the bag-pushing upright plate 11 near the roller 2. A conveyor belt 13 is provided at the end of the bag-pressing platform 10 away from the roller 2. The conveyor belt 13 is driven by a drive device (not shown). The drive device of the conveyor belt 13, the infrared photoelectric sensor 5, the hydraulic cylinder 6 and the bag-pushing cylinder 12 are all electrically connected to the PLC automatic control system 14. The PLC automatic control system 14 is a Siemens S7-1200 series (CPU1214C) PLC controller. A PLC controller box 141 is provided outside. The PLC automatic control system 14 is also equipped with a buzzer 142 and an LED indicator 143.

[0027] In actual production, after being unpacked by roller 2, the empty bags exit from the outlet end of roller 2 and slide into the pressing cylinder 3 through the protrusion 4. At this time, the infrared photoelectric sensor 5 senses the empty bag sliding down and sends a signal to the PLC automatic control system 14. After receiving the signal, the PLC automatic control system 14 starts the hydraulic cylinder 6, which drives the pressure plate 8 to press the empty bag. The thickness of the pressed empty bag is in the range of 30-50mm, and it falls on the pressing platform 10. Then, the hydraulic cylinder 6 drives the pressure plate 8 to return to its position. At this time, the bag pushing cylinder 12 is started, which drives the bag pushing plate 11 to push the empty bag onto the conveyor belt 13. The conveyor belt 13 transports the empty bag to the next process. After the bag pushing cylinder 12 pushes the bag, it drives the bag pushing plate 11 to return to its position, waiting for the next push.

[0028] Abnormal Handling: If the pressure sensor inside the hydraulic cylinder 6 detects an abnormal pressure (such as >3MPa or <0.3MPa), the PLC automatic control system 14 issues a command to immediately stop the hydraulic cylinder 6 and the bag pushing cylinder 12 and trigger an alarm, while controlling the conveyor belt 13 to reduce its speed to a safe speed.

[0029] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. An anti-pinch bag device for a bag-opening machine, characterized in that: The machine includes a frame for unpacking, with a roller connected to the outlet end of the frame via a bearing, and a bag-pressing cylinder connected to the outlet end of the roller. The top of the bag-pressing cylinder is sealed, and a protrusion is provided on one side of the upper part of the cylinder, connecting to the outlet end of the roller. An infrared photoelectric sensor is located at the lower part of the protrusion where it connects to the cylinder body. A hydraulic cylinder is connected to the upper part of the bag-pressing cylinder, with its cylinder body positioned above the cylinder body and connected to a pressure plate inside the cylinder body via a piston rod. The lower end of the bag-pressing cylinder is open, and a bag-pressing platform is located below the cylinder body. A bag-pushing upright plate is positioned between the lower end of the cylinder body and the bag-pressing platform, and a bag-pushing cylinder is located on the side of the bag-pushing upright plate near the roller. A conveyor belt is located at the end of the bag-pressing platform away from the roller, and the conveyor belt is driven by a drive device. The drive device of the conveyor belt, the infrared photoelectric sensor, the hydraulic cylinder, and the bag-pushing cylinder are all electrically connected to a PLC automatic control system.

2. The anti-pinch bag device for a packaging unpacking machine as described in claim 1, characterized in that: The bag-pressing cylinder has a cylindrical body.

3. The anti-pinch bag device for a packaging unpacking machine as described in claim 1, characterized in that: The lower part of the protruding part of the bag-pressing cylinder is angled downwards from the outlet end of the roller.

4. The anti-pinch bag device for a packaging unpacking machine as described in claim 1, characterized in that: The hydraulic cylinder is equipped with a pressure sensor.

5. The anti-pinch bag device for a packaging unpacking machine as described in claim 1, characterized in that: The bottom panel of the pressure plate is evenly provided with several anti-slip grooves.

6. The anti-pinch bag device for a packaging unpacking machine as described in claim 1, characterized in that: The PLC automatic control system is a PLC controller, which is externally housed in a PLC controller enclosure.

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