Abnormal packaging material detection device for cement bag conveying line

Abstract

The utility model relates to the technical field of packaging bag position detection, in particular to an abnormal packaging material detection device for a cement bag conveying line, which comprises a support frame arranged on the conveying line, a plurality of detection mechanisms are arranged on the support frame at intervals, and each detection mechanism comprises a touch rod rotationally connected to the support frame. The touch rod is provided with a packaging bag detection sensor used for detecting whether packaging bags exist or not, and the touch rod is further provided with a rotation angle detection device used for detecting the rotation angle of the touch rod. According to the utility model, the existence of the bag body is detected through the sensor, and normal bags, under-load bags, empty bags and transverse bags are distinguished in combination with the collision rod corner, so that the occurrence of under-load packaging bags, no-load packaging bags and transverse bags can be detected in time, the downtime caused by subsequent bag blockage and clamping can be greatly reduced, and the logistics continuity is effectively ensured.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag position detection technology, specifically to an abnormal packaging detection device for cement bag transport lines. Background Technology

[0002] In automated packaging operations on cement production lines, the following three types of abnormal packaging often occur on cement bag transport lines: 1. Underloaded bags: Due to errors in the weighing system of the cement packaging machine (such as sensor temperature drift and air pressure fluctuations), insufficient or interrupted filling may occur, leading to underloaded bags; 2. Empty bags: Due to the delayed response of the bag clamping mechanism of the cement packaging machine, the bag may not be fully unfolded before leaving the workstation, resulting in empty bags; 3. Horizontal bags: Defined as an abnormal state where the long axis of the packaging bag deviates from the axis of the transport line by more than a critical angle. The main causes include: inconsistent operating speeds in different sections of the conveyor line (when the speed difference Δv ≥ 0.15 m / s), causing the packaging bag to experience asymmetrical frictional forces in the transition area, resulting in a deviation in the direction of movement; initial position deviation when the cement bag falls from the packaging machine onto the unloading machine belt; and position deviation caused by the interaction force generated when the preceding cement bag is stuck on the conveyor line and the subsequent cement bag pushes against the preceding bag.

[0003] These abnormal packages can easily trigger chain reactions on the conveyor line. Underloaded or empty bags, due to insufficient weight, are prone to sliding and piling up during transport, disrupting the continuity of logistics. Horizontal packages can collide with equipment structures on the conveyor line (such as conveyor guide rails or side baffles, roller gaps, belt joints, or areas with height differences), triggering a chain reaction of displacement of adjacent packages and forming a blockage in the core area. This, in turn, affects the normal operation of the automatic loading machine, causing downtime of both the conveyor line and the loading machine. In existing technologies, fault handling requires manual intervention. Maintenance personnel must wait for the fault to appear before implementing a full line shutdown and manually troubleshooting to eliminate the fault point. This approach results in a 12%-15% loss of effective production line operating time and incurs additional human resource costs.

[0004] Therefore, there is an urgent need for a system that can detect underloaded bags, empty bags, and horizontal bags before blockages and jams occur, and automatically stop the conveyor line so that workers can clean up empty bags in time and deal with underloaded bags, empty bags, and horizontal bags, which can greatly reduce downtime caused by blockages and jams. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an abnormal packaging detection device for cement bag transport lines that can detect the occurrence of underloaded packaging bags, empty packaging bags, and horizontal packaging.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An abnormal packaging detection device for a cement bag transport line includes a support frame installed on the transport line. Several detection mechanisms are spaced apart on the support frame. Each detection mechanism includes a touch bar rotatably connected to the support frame. A packaging bag detection sensor for detecting the presence of a packaging bag is installed on the touch bar. An angle detection device for detecting the rotation angle of the touch bar is also installed on the touch bar.

[0008] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0009] When the packaging bag detection sensor detects the presence of a packaging bag, but the rotation angle of the contact bar detected by the corner detection device is less than the set value, there is an underloaded or empty packaging bag on the transport line, and the main controller outputs an alarm signal; when more than a set number of detection mechanisms simultaneously detect packaging bags, there is a horizontal bag on the transport line; through this device, the occurrence of underloaded, empty, and horizontal packaging bags can be detected in a timely manner, which can greatly reduce the downtime caused by subsequent bag blockage and jamming, and effectively ensure the continuity of logistics.

[0010] As a preferred embodiment, a further technical solution of this utility model is:

[0011] Preferably, a buffer seat is provided on the support frame for each impact bar, and a hydraulic buffer is provided on the buffer seat. The buffer contact of the hydraulic buffer is located on the side close to the impact bar. After the cement bag is conveyed to the correct position, the impact bar returns to its original position by gravity. The hydraulic buffer can absorb kinetic energy, prevent the impact bar from being damaged by instantaneous impact, and extend the service life of the device.

[0012] Preferably, the hydraulic buffer is tilted upwards from the buffer seat towards the impact rod, with an tilt angle of 10° to 45°. This upward tilt of the hydraulic buffer matches the natural return trajectory of the impact rod (due to gravity), balancing vertical impact absorption with horizontal kinetic energy dispersion. If the angle is too small (e.g., <10°), the buffer is approximately horizontal, weakening its cushioning effect on the falling impact rod; if the angle is too large (e.g., >45°), it may hinder the impact rod's return. This angle range ensures that the hydraulic buffer absorbs collision energy without affecting the rapid return of the impact rod.

[0013] Preferably, a support base is provided on the side of the contact rod away from the support frame, the packaging bag detection sensor is installed on the support base, and an air duct for blowing the detection end of the packaging bag detection sensor is also provided on the support base.

[0014] Preferably, the support frame includes a portal frame, and a mounting seat is provided on the crossbeam of the portal frame corresponding to each bumper. The mounting seat is provided with a bearing, and a rotating shaft is provided in the bearing. The bumper is rotatably connected to the mounting seat through the rotating shaft.

[0015] Preferably, the rotation angle detection device is a tilt sensor mounted on the rotating shaft.

[0016] Preferably, the corner detection device includes a proximity switch and a sensing plate, with the proximity switch mounted on a mounting base and the sensing plate mounted on a rotating shaft.

[0017] Preferably, there are three equally spaced detection mechanisms, with the interval being greater than half the width of the packaging bag and less than half the length of the packaging bag; one detection mechanism is triggered for a normal bag, and ≥2 detection mechanisms are triggered for a horizontal bag, thus achieving logical differentiation; the three detection mechanisms form a linear array, covering the width direction of the transport line, balancing the detection range and cost, and avoiding the complexity of installation due to too many mechanisms or the missed detection due to too few mechanisms.

[0018] Preferably, the lower end of the contact bar has an arc-shaped or spherical structure; the arc-shaped or spherical structure can reduce contact stress and prevent sharp edges from tearing the packaging bag. Attached Figure Description

[0019] Figure 1 This is an embodiment of the present utility model. Figure 2 This is a schematic diagram of the structure in an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the detection mechanism in an embodiment of this utility model;

[0021] Figure 3 This is another structural schematic diagram of the detection mechanism in an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Gantry frame; 2. Mounting base; 201. Detachable base; 202. Ear plate; 3. Bumper bar; 4. Packaging bag detection sensor; 5. Corner detection device; 501. Proximity switch; 502. Sensing plate; 6. Hydraulic buffer; 7. Packaging bag; 8. Conveyor belt; 9. Support base; 10. Air duct; 11. Buffer seat; 12. Rotating shaft. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. The purpose of this description is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0024] like Figures 1 to 3As shown, this embodiment provides an abnormal packaging detection device for a cement bag transport line, including a support frame installed on the transport line. Several detection mechanisms are spaced apart on the support frame. Each detection mechanism includes a touch rod 3 rotatably connected to the support frame. A packaging bag detection sensor 4 is installed on the touch rod 3 to detect the presence of a packaging bag 7. An angle detection device 5 is also installed on the touch rod 3 to detect the rotation angle of the touch rod 3. The packaging bag detection sensor 4 can be a photoelectric switch; the angle detection device 5 can be a tilt sensor mounted on a rotating shaft 12; alternatively, it can be a proximity switch 501 and a sensing plate 502. The proximity switch 501 is mounted on a mounting base 2, and the sensing plate 502 is mounted on the rotating shaft 12.

[0025] The abnormal packaging detection device in this invention is installed on a conveyor such as a belt conveyor or roller conveyor. Figure 1 The support frame can be installed on the side frame of the belt conveyor, and the detection mechanism is located on the upper side of the conveyor belt 8. In use, both the corner detection device 5 and the packaging bag detection sensor 4 are connected to the main controller. The packaging bag detection sensor 4 determines the presence of the bag, and the corner detection device 5 measures the rotation angle of the contact rod 3 (reflecting the bag thickness). This allows for the differentiation of normal bags (normal angle), underloaded / empty bags (angle too small), and horizontal bags (multiple mechanisms trigger simultaneously). When abnormal packaging (underloaded packaging bags 7, empty packaging bags 7, and horizontal bags) appears on the transport line, staff can be notified in time and make adjustments to avoid subsequent bag blockages and jams, effectively ensuring the continuity of logistics.

[0026] To prevent the impact rod 3 from returning to its original position by gravity after the cement bag has been conveyed out of place, and to avoid damage to the impact rod 3 due to instantaneous impact, a buffer seat 11 is provided on the support frame for each impact rod 3. A hydraulic buffer 6 is installed on the buffer seat 11, and the buffer contact of the hydraulic buffer 6 is located on the side closer to the impact rod 3. The hydraulic buffer 6 is inclined upward from the buffer seat 11 towards the impact rod 3, with an inclination angle of 10° to 45°. If the inclination angle is less than 10°, the buffering effect of the hydraulic buffer 6 on the impact rod 3 falling is weakened; if the inclination angle is greater than 45°, it may hinder the impact rod 3 from returning to its original position.

[0027] To prevent dust from obstructing the detection end of the packaging bag detection sensor 4, a support base 9 is provided on the side of the contact rod 3 away from the support frame. The packaging bag detection sensor 4 is mounted on the support base 9, which is also equipped with an air duct 10 for blowing on the detection end of the packaging bag detection sensor 4. The air duct 10 is connected to an air source via a solenoid valve, which is connected to the main controller to achieve periodic blowing on the detection end of the packaging bag detection sensor 4.

[0028] The support frame includes a portal frame 1. A mounting seat 2 is provided on the crossbeam of the portal frame 1 corresponding to each contact rod 3. A bearing is provided on the mounting seat 2, and a rotating shaft 12 is installed within the bearing. The contact rod 3 is rotatably connected to the mounting seat 2 via the rotating shaft 12. In this embodiment, the mounting seat 2 includes a detachable base 201 and a pair of ear plates 202 disposed on the detachable base 201. The bearing is disposed on the ear plates 202. The detachable base 201 includes an upper clamping plate and a lower clamping plate, which are connected to the crossbeam of the portal frame 1 by connecting bolts and connecting nuts. The detachable base 201 enables adjustable connection positions, thereby allowing adjustment of the spacing and number of detection mechanisms according to different sizes of packaging bags 7.

[0029] In this embodiment, as Figure 1 There are three equally spaced detection mechanisms, with the interval being greater than half the width of the seven bags and less than half the length of the seven bags. Normal bags trigger ≤ 2 detection mechanisms, while horizontal bags trigger > 2 detection mechanisms to achieve logical differentiation. The three detection mechanisms form a linear array, covering the width of the transport line, balancing the detection range and cost, and avoiding the complexity of installation due to too many mechanisms or the missed detection due to too few mechanisms.

[0030] In this embodiment, to prevent the lower edge of the contact rod 3 from tearing the packaging bag 7, the lower end of the contact rod 3 has an arc-shaped or spherical structure.

[0031] Furthermore, during on-site use, the main controller is connected to the controller of the cement bag transport line (e.g., the controller of the transport machine). The main controller is also connected to an LED tri-color alarm light and a buzzer. When there is a shortage of packaging bags 7, an empty packaging bag 7, or a horizontal bag, the main controller controls the transport machine to stop. The main controller can also control the different colors of the LED tri-color alarm light to light up, and in conjunction with the buzzer alarm, it prompts the staff to deal with the situation as soon as possible.

[0032] This new type of bag detection uses sensors to detect the presence of bags and combines the three-angled contact bar to distinguish between normal bags, underloaded / empty bags, and horizontal bags. The air duct 10 improves reliability through purging. It can adapt to different bag types, reduce downtime, and effectively solve the problems of bag blockage and low efficiency of manual inspection.

[0033] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. An abnormal packaging detection device for a cement bag transport line, characterized in that: It includes a support frame set on the transport line, and several detection mechanisms are set at intervals on the support frame. Each detection mechanism includes a touch bar (3) rotatably connected to the support frame. A packaging bag detection sensor (4) is set on the touch bar (3) to detect the presence of the packaging bag (7). An angle detection device (5) is also set on the touch bar (3) to detect the rotation angle of the touch bar (3).

2. The abnormal packaging detection device for cement bag transport lines according to claim 1, characterized in that: A buffer seat (11) is provided on the support frame for each of the contact rods (3), and a hydraulic buffer (6) is provided on the buffer seat (11). The buffer contact of the hydraulic buffer (6) is located on the side close to the contact rod (3).

3. The abnormal packaging detection device for cement bag transport lines according to claim 1, characterized in that: The hydraulic buffer (6) is tilted upward from the buffer seat (11) toward the impact rod (3) at an angle of 10° to 45°.

4. The abnormal packaging detection device for cement bag transport lines according to claim 1, characterized in that: A support base (9) is provided on the side of the contact rod (3) away from the support frame. The packaging bag detection sensor (4) is set on the support base (9). A duct (10) for blowing the detection end of the packaging bag detection sensor (4) is also provided on the support base (9).

5. The abnormal packaging detection device for cement bag transport lines according to claim 1, characterized in that: The support frame includes a portal frame (1). A mounting seat (2) is provided on the crossbeam of the portal frame (1) for each bump rod (3). A bearing is provided on the mounting seat (2), and a rotating shaft (12) is provided in the bearing. The bump rod (3) is rotatably connected to the mounting seat (2) through the rotating shaft (12).

6. The abnormal packaging detection device for cement bag transport line according to claim 5, characterized in that: The rotation angle detection device (5) is a tilt sensor installed on the rotating shaft (12).

7. The abnormal packaging detection device for cement bag transport lines according to claim 5, characterized in that: The corner detection device (5) includes a proximity switch (501) and a sensing plate (502). The proximity switch (501) is mounted on the mounting base (2), and the sensing plate (502) is mounted on the rotating shaft (12).

8. The abnormal packaging detection device for cement bag transport line according to claim 1, characterized in that: Three testing agencies are set up at equal intervals, with the interval being greater than half the width of the packaging bag (7) and less than half the length of the packaging bag (7).

9. The abnormal packaging detection device for cement bag transport line according to claim 1, characterized in that: The lower end of the contact rod (3) has an arc or spherical structure.

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