Ton bag clamping device control method and logistics device

Abstract

The purpose of the present invention is to disclose a control method and logistics device for a ton bag clamping device, comprising the following steps: the first electric cylinder and the second electric cylinder respectively drive the first clamping plate and the second clamping plate to move to both sides S1 and S2; the lifting component is started to drive the first clamping plate and the second clamping plate to descend and make the bottom of the first clamping plate and the second clamping plate flush with the bottom of the ton bag; the first electric cylinder and the second electric cylinder respectively drive the first clamping plate and the second clamping plate to move inward S1 and S2 and clamp the two sides of the ton bag respectively; the first electric cylinder and the second electric cylinder respectively drive the first clamping plate and the second clamping plate to move to both sides and release the ton bag. The technical effects are as follows: by using the first electric cylinder and the second electric cylinder, the electric cylinder control accuracy is high and the electric cylinder will not generate oil pollution; the first electric cylinder and the second electric cylinder respectively move independently, which can move the first clamping plate and the second clamping plate respectively. When the placement position of the ton bag deviates, the ton bag can be accurately clamped by adjusting the displacement distance of the first clamping plate and the second clamping plate.

Description

Technical Field

[0001] The present invention relates to the technical field of powder or granular materials, in particular to a control method for a ton bag clamping device and a logistics device. Background Art

[0002] Powdered or granular materials, especially those with high fluidity, such as lithium iron phosphate powder or granules, are often packaged in ton bags during production, circulation, inspection, and logistics. Once filled with powdered or granular materials, these bags typically weigh between 300 and 600 kg, which is quite heavy. On the one hand, the ton bags are misaligned when they are lifted, meaning they are not centered. This prevents the clamping device from accurately gripping the bags during lifting. On the other hand, due to their high fluidity and difficulty in shaping, they require significant manpower for circulation, inspection, and logistics. If the ton bags cannot be kept relatively square during transportation, bulk transport is impossible. Existing techniques often employ lugs on the ton bags, requiring manual hanging and movement. This approach is inefficient and also suffers from the technical drawback of bag deformation. In summary, the production, circulation, inspection, and logistics of ton bags containing highly fluid powdered or granular materials face insurmountable technical obstacles and drawbacks, resulting in low efficiency and difficulty in shaping the bags.

[0003] In view of this, it is necessary to develop a ton bag clamping device control method and a logistics device to overcome the above-mentioned defects. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to disclose a control method and logistics device for a ton bag clamping device, which drives the precise displacement of the first clamping plate and the second clamp respectively through the first electric cylinder and the second electric cylinder to achieve precise clamping and moving of the ton bag.

[0005] The first object of the present invention is to develop a control method for a ton bag clamping device.

[0006] The second object of the present invention is to develop a ton bag logistics device.

[0007] To achieve the above-mentioned first object of the invention, the present invention provides a method for controlling a ton bag clamping device, comprising the following steps:

[0008] The ton bag is transported from the first conveying platform to the bottom of the clamping device;

[0009] The first electric cylinder and the second electric cylinder drive the first clamping plate and the second clamping plate to move to two sides S1 and S2 respectively;

[0010] Start the lifting assembly to drive the first clamping plate and the second clamping plate to descend and make the bottoms of the first clamping plate and the second clamping plate flush with the bottom of the ton bag;

[0011] The first electric cylinder and the second electric cylinder respectively drive the first clamping plate and the second clamping plate to move inwards S1 and S2 and respectively clamp the two sides of the big bag;

[0012] Start the lifting assembly to drive the first clamping plate and the second clamping plate holding the ton bag to rise to a predetermined height;

[0013] The second conveying platform is conveyed to the bottom of the clamping device;

[0014] Start the lifting assembly to drive the first clamping plate and the second clamping plate holding the ton bag to descend to the second conveying platform;

[0015] The first electric cylinder and the second electric cylinder respectively drive the first clamping plate and the second clamping plate to move to both sides and release the big bag;

[0016] Start the lifting assembly to drive the first clamping plate and the second clamping plate in the opened state to rise to a predetermined height;

[0017] The second conveying platform transports the ton bags away.

[0018] Preferably, when the torque of the first electric cylinder reaches a threshold value A1, the first electric cylinder stops;

[0019] When the torque of the second electric cylinder reaches a threshold value A2, the second electric cylinder stops.

[0020] Preferably, when the torque of the first electric cylinder reaches a threshold value A1, the movement distance of the first clamping plate is S3, and the difference between S1 and S3 is compensated to S2;

[0021] When the torque of the second electric cylinder reaches the threshold value A2, the movement distance of the second clamping plate is S4, and the difference between S2 and S4 is compensated to S1.

[0022] Preferably, a first curved plate bent toward the ton bag is provided at the bottom of the first clamping plate, and a second curved plate bent toward the ton bag is provided at the bottom of the second clamping plate.

[0023] Preferably, S1 is greater than the width of the first curved plate, and S2 is greater than the width of the second curved plate.

[0024] Preferably, a first baffle is tangentially provided at the end of the first curved plate, and a second baffle is tangentially provided at the end of the second curved plate, and the cross-sections of the first baffle and the second baffle are rectangular with rounded corners.

[0025] Preferably, the heights of the first clamping plate and the second clamping plate are both greater than the height of the ton bag, and the widths of the first clamping plate and the second clamping plate are both slightly greater than the width of the ton bag.

[0026] Preferably, during the step of starting the lifting assembly to drive the first and second splints in the open state to rise to a predetermined height, the front and rear end surfaces of the ton bag are leveled by rotating the first and second rotating rods arranged on both sides of the first and second splints.

[0027] Preferably, the first rotating rod and the second rotating rod are made of hot die steel.

[0028] Based on the same inventive principle, in order to achieve the above-mentioned second invention purpose, the present invention provides a ton bag logistics device, which adopts the ton bag clamping device control method as described in the first invention to circulate ton bags.

[0029] Compared with the prior art, the technical effects of the present invention are as follows:

[0030] The use of the first electric cylinder and the second electric cylinder has high control accuracy on the one hand, and will not produce oil pollution on the other hand; in addition, the first electric cylinder and the second electric cylinder move independently, which can make the first clamping plate and the second clamping plate move separately. When the placement position of the ton bag deviates, the displacement distance of the first clamping plate and the second clamping plate can be adjusted to achieve precise clamping of the ton bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 It is a schematic diagram of the main structure of the clamping device of the present invention.

[0033] Figure 2 It is a schematic diagram of the three-dimensional structure of the clamping device of the present invention.

[0034] Figure 3 It is a flow chart of the control method of the clamping device of the present invention.

[0035] Figure 4 It is a schematic diagram of the main structure of the ton bag of the present invention.

[0036] Figure 5 It is a bottom view of the structure of the clamping device of the present invention.

[0037] Among them, 1. first electric cylinder; 2. second electric cylinder; 3. moving platform; 4. first clamping plate; 41. first curved plate; 411. first baffle; 5. second clamping plate; 51. second curved plate; 511. second baffle; 6. lifting assembly; 7. first rotating rod; 8. second rotating rod; 9. fixing block; 91. through hole. DETAILED DESCRIPTION

[0038] The present invention is described in detail below with reference to the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in this field based on these embodiments are all within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0040] Example 1

[0041] Ginseng Figures 1 to 5 As shown, this embodiment discloses a specific implementation method of a ton bag clamping device control method.

[0042] Ton bag clamping device control method, see Figure 3 , including the following steps:

[0043] A1: Ton bags are transported from the first conveying platform to the bottom of the clamping device. Specifically, when ton bags are circulated within the factory or transported over long distances, they need to be moved or replaced with pallets. The first conveying platform is the first pallet. Given that ton bags usually weigh 300-600kg and the powder or granular materials in the ton bags are highly fluid, it is difficult for the ton bags to be lifted by automatic equipment. Either the lifting force is insufficient, or the ton bags are punctured due to excessive lifting force, or the shape of the ton bags changes significantly after lifting, making them unusable.

[0044] A2: The first electric cylinder and the second electric cylinder drive the first clamping plate and the second clamping plate to move to the sides S1 and S2 respectively; for details, see Figure 2 The first electric cylinder 1 and the second electric cylinder 2 are respectively arranged on the mobile platform 3, and the first clamping plate 4 is vertically arranged on one side of the mobile platform 3, and the second clamping plate 5 is vertically arranged on the other side of the mobile platform 3. The first electric cylinder 1 drives the first clamping plate 4 to move S1 away from the ton bag, and the second electric cylinder 2 drives the second clamping plate 5 to move S2 away from the ton bag, so that the first clamping plate 4 and the second clamping plate 5 are in an open state and the distance between them is sufficient to accommodate the ton bag.

[0045] A3: Start the lifting assembly to drive the first and second splints to descend and make the bottoms of the first and second splints flush with the bottom of the ton bag; specifically, the lifting assembly 6 is arranged above the mobile platform 3, and the bottoms of the first and second splints 4 and 5 are flush with the bottom of the ton bag, so that the first and second splints 4 and 5 can lift the bottom of the ton bag.

[0046] A4: The first electric cylinder and the second electric cylinder respectively drive the first clamping plate to move inward S1 and the second clamping plate to clamp the two sides of the ton bag respectively; specifically, the first electric cylinder 1 drives the first clamping plate 4 to move toward the ton bag S1, and the second electric cylinder 2 drives the second clamping plate 5 to move toward the ton bag S2, so that the first clamping plate 4 and the second clamping plate 5 are in a closed state and the distance between them is slightly smaller than the width of the ton bag, which helps to clamp the ton bag.

[0047] It should be further explained that to prevent the ton bag from being crushed or excessively deformed, a torque threshold A1 is set for the first electric cylinder. When the torque of the first electric cylinder reaches threshold A1, the first electric cylinder stops. Similarly, a torque threshold A2 is set for the first electric cylinder. When the torque of the second electric cylinder reaches threshold A2, the second electric cylinder stops. If the ton bag is positioned correctly, when the first and second clamping plates 4 and 5 are closed, the ton bag is properly clamped, and the torque thresholds of the first and second electric cylinders are both less than the set thresholds. If there is a deviation in the placement position of the ton bag, one of the splints will encounter resistance from the ton bag, but the other splint will be subjected to very little force or even no force. To solve this problem, when the torque of the first electric cylinder reaches the threshold value A1, the moving distance of the first splint is S3, and the difference between S1 and S3 is compensated to S2, that is, the distance that the first splint moves less is compensated to the second splint, so that the first splint and the second splint can clamp the ton bag; when the torque of the second electric cylinder reaches the threshold value A2, the moving distance of the second splint is S4, and the difference between S2 and S4 is compensated to S1, that is, the distance that the second splint moves less is compensated to the first splint, so that the first splint and the second splint can clamp the ton bag.

[0048] A5: Start the lifting assembly to drive the first clamping plate and the second clamping plate that clamp the ton bag to a predetermined height; specifically, after clamping the ton bag in step A4, lift the ton bag to the predetermined height.

[0049] A6: The second conveying platform is transported to the bottom of the clamping device; specifically, the second conveying platform is the second pallet, which is ready for the replacement of the pallet for the ton bag.

[0050] A7: Start the lifting assembly to drive the first clamping plate and the second clamping plate that clamp the ton bag down to the second conveying platform; specifically, place the clamped ton bag on the second conveying platform.

[0051] A8: The first electric cylinder and the second electric cylinder respectively drive the first clamping plate and the second clamping plate to move to both sides and release the ton bag; specifically, the purpose of this step is to release the ton bag.

[0052] A9: Start the lifting assembly to drive the first and second clamping plates in the open state to rise to a predetermined height; specifically, this step is to prepare for clamping the subsequent ton bags

[0053] A10: The second conveying platform transports the ton bags away. Specifically, the ton bags placed on the second conveying platform are removed.

[0054] See also Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , Figure 4 It is the main view of the ton bag. In order to smoothly clamp the ton bag, the lifting assembly 6 drives the mobile platform 3 to rise or fall in the height direction. The first electric cylinder 1 and the second electric cylinder 2 are respectively arranged on the mobile platform 3. The first electric cylinder 1 drives the first clamping plate 4 to move away from or close to the ton bag through the guide rail, and the second electric cylinder 2 drives the second clamping plate 5 to move away from or close to the ton bag through the guide rail; the first clamping plate 4 is provided with a first curved plate 41 bent in the direction of the ton bag, and the bottom of the second clamping plate 5 is provided with a second curved plate 51 bent in the direction of the ton bag, and S1 is greater than the width of the first curved plate 41, and S2 is greater than the width of the second curved plate 51, leaving enough space for clamping the ton bag, a first baffle 411 is tangentially provided at the end of the first curved plate 41, and a second baffle 511 is tangentially provided at the end of the second curved plate 51, the cross-section of the first baffle 411 and the second baffle 511 is a rounded rectangle, and the rounded rectangular baffle can avoid puncturing the ton bag.

[0055] See also Figure 2 and Figure 5In order to keep the front and rear end surfaces of the ton bag basically flat after clamping, the heights of the first clamping plate 4 and the second clamping plate 5 are both greater than the height of the ton bag, and the widths of the first clamping plate 4 and the second clamping plate 5 are both slightly greater than the width of the ton bag. During the execution of step A9, the front and rear end surfaces of the ton bag are flattened by rotating the first rotating rod 7 and the second rotating rod 8 arranged on both sides of the first clamping plate 4 and the second clamping plate 5; the left and right end surfaces of the ton bag are kept flat by the first clamping plate 4 and the second clamping plate 5 arranged in parallel, and the left and right end surfaces of the ton bag are kept flat by the first rotating rod 7 and the second rotating rod The rod 8 keeps the front and rear end surfaces of the ton bag flat; in order to reduce the flattening resistance and prevent the rotating rod from deforming, the first rotating rod 7 and the second rotating rod 8 are made of hot die steel and the surface is polished; the two ends of the first rotating rod 7 and the second rotating rod 8 are respectively fixed to the first splint 4 and the second splint 5 by fixing blocks 9, and the fixing block 9 is provided with a through hole 91, and the diameter of the through hole 91 is larger than the diameter of the first rotating rod 7 and the second rotating rod 8, that is, the first rotating rod 7 and the second rotating rod 8 can automatically rotate in the through hole 91, thereby flattening the front and rear end surfaces of the ton bag through the rolling circular surface.

[0056] Through steps A1 to A10, through the independent displacement control of the first clamping plate 4 and the second clamping plate 5 and the independent torque thresholds of the first electric cylinder 1 and the second electric cylinder 2, it is possible to clamp ton bags with deviations in the position, rather than being unable to clamp or damaging the ton bags due to position deviations. When clamping the ton bags, the planes of the first clamping plate 4 and the second clamping plate 5, the arc surface composed of the first arc plate 41 and the second arc plate, and the rounded cold surface composed of the first baffle 411 and the second baffle 511 are jointly supported, so that the ton bags can be clamped without exposing the ton bags to the risk of being punctured.

[0057] Example 2

[0058] This embodiment provides a ton bag logistics device, which adopts the ton bag clamping device control method as described in Example 1 to circulate ton bags, and realizes the automatic clamping, lifting, lowering, releasing and leveling of ton bags without manual hanging ears, providing a basis for the automation of ton bag turnover, inspection and logistics transportation links.

[0059] The ton bag logistics device disclosed in this embodiment has the same technical solution as that in Example 1. Please refer to Example 1 and will not repeat it here.

Claims

1. The control method of the ton bag clamping device is characterized in that: The following steps are involved: The ton bag is transported from the first conveying platform to the bottom of the clamping device; The first electric cylinder and the second electric cylinder drive the first clamping plate and the second clamping plate to move to two sides S1 and S2 respectively; Start the lifting assembly to drive the first clamping plate and the second clamping plate to descend and make the bottoms of the first clamping plate and the second clamping plate flush with the bottom of the ton bag; The first electric cylinder and the second electric cylinder respectively drive the first clamping plate and the second clamping plate to move inwards S1 and S2 and respectively clamp the two sides of the big bag; Start the lifting assembly to drive the first clamping plate and the second clamping plate holding the ton bag to rise to a predetermined height; The second conveying platform is conveyed to the bottom of the clamping device; Start the lifting assembly to drive the first clamping plate and the second clamping plate holding the ton bag to descend to the second conveying platform; The first electric cylinder and the second electric cylinder respectively drive the first clamping plate and the second clamping plate to move to both sides and release the big bag; The lifting assembly is started to drive the first and second clamping plates in the opened state to rise to a predetermined height. During this process, the front and rear end surfaces of the ton bag are leveled by rotating the first and second rotating rods provided on both sides of the first and second clamping plates. The ends of the first and second rotating rods are respectively fixed to the first and second clamping plates by fixing blocks. The fixing blocks are provided with through holes, and the diameters of the through holes are larger than the diameters of the first and second rotating rods. The second conveying platform transports the ton bags away.

2. The method for controlling a ton bag clamping device according to claim 1, characterized in that: When the torque of the first electric cylinder reaches a threshold value A1, the first electric cylinder stops; When the torque of the second electric cylinder reaches a threshold value A2, the second electric cylinder stops.

3. The method for controlling a ton bag clamping device according to claim 2, wherein: When the torque of the first electric cylinder reaches the threshold value A1, the movement distance of the first clamping plate is S3, and the difference between S1 and S3 is compensated to S2; When the torque of the second electric cylinder reaches the threshold value A2, the movement distance of the second clamping plate is S4, and the difference between S2 and S4 is compensated to S1.

4. The method for controlling a ton bag clamping device according to any one of claims 1 to 3, characterized in that: A first curved plate bent toward the ton bag is provided at the bottom of the first clamping plate, and a second curved plate bent toward the ton bag is provided at the bottom of the second clamping plate.

5. The method for controlling a ton bag clamping device according to claim 4, characterized in that: S1 is greater than the width of the first curved plate, and S2 is greater than the width of the second curved plate.

6. The method for controlling a ton bag clamping device according to claim 5, wherein: A first baffle is tangentially provided at an end of the first arc-shaped plate, and a second baffle is tangentially provided at an end of the second arc-shaped plate. The cross-sections of the first baffle and the second baffle are rectangular with rounded corners.

7. The method for controlling a ton bag clamping device according to claim 4, wherein: The heights of the first clamping plate and the second clamping plate are both greater than the height of the ton bag, and the widths of the first clamping plate and the second clamping plate are both slightly greater than the width of the ton bag.

8. The method for controlling a ton bag clamping device according to claim 7, wherein: During the step of starting the lifting assembly to drive the first and second clamping plates in the opened state to rise to a predetermined height, the front and rear end surfaces of the ton bag are leveled by rotating the first and second rotating rods arranged on both sides of the first and second clamping plates.

9. The method for controlling a ton bag clamping device according to claim 8, wherein: The first rotating rod and the second rotating rod are made of hot die steel.

10. Ton bag logistics device, characterized in that: The ton bag is circulated by adopting the ton bag clamping device control method as described in any one of claims 1 to 9.

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