Quantitative packaging system

Abstract

The utility model discloses a quantitative packaging system, which comprises a stock bin, a feeding hopper, a feeding hopper and a discharging hopper, one end of the three-way pipe is rotatably connected to the blanking pipe, and the other two ends of the three-way pipe are respectively provided with a vertically downward discharge port; the first switch gate mechanism is arranged on the blanking pipe or the three-way pipe; and the lifting table is located below the two discharging ports, and the lifting table is provided with a table top which ascends and descends in the vertical direction. Compared with the prior art, two packaging bags can be filled in one procedure, the packaging efficiency of plastic particles is improved, fixed-height filling of different packaging bags can be achieved, due to the fact that the plastic particles in the packaging bags hinder gravity blanking of the stock bin, the plastic particles in the packaging bags can be effectively compacted, and the packaging efficiency of the packaging bags is improved. The requirement of quantitative packaging is met on the premise that weighing is not carried out.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, in particular to a quantitative packaging system. Background Art

[0002] Plastic pellets refer to small granular materials made from polymers through processes such as melting, extrusion, and granulation. They are one of the main raw materials for making various plastic products. Common plastic products include plastic bags, plastic pipes, plastic barrels, plastic boxes, plastic plates, etc.

[0003] At the end of the plastic pellet production line, the pellets need to be packaged into packages of specified weights for shipment to different regions. Currently, this is typically done by weighing or by controlling the loading time, and only one bag of pellets can be dispensed at a time. To improve the efficiency of plastic pellet packaging, improvements to the existing packaging system are urgently needed. Utility Model Content

[0004] The utility model aims to provide a quantitative packaging system, which can improve the packaging efficiency of plastic particles.

[0005] According to the first embodiment of the present invention, the quantitative packaging system includes:

[0006] A silo, the bottom of which is provided with a drop pipe inclined downward;

[0007] A tee pipe, one end of which is rotatably connected to the drop pipe, and the other two ends of the tee pipe are respectively provided with a vertical downward discharge port;

[0008] A first switch gate mechanism, which is provided on the drop pipe or the tee pipe;

[0009] A lifting platform is located below the two discharge ports, and the lifting platform is provided with a table surface that can be lifted up and down.

[0010] The quantitative packaging system according to the embodiment of the present invention has at least the following beneficial effects: before loading, first place the two packaging bags on the table top of the lifting platform, then control the lifting platform to raise the height positions of the two packaging bags so that the two discharge ports of the three-way pipe are respectively located at the specified height positions of the two packaging bags. After that, the first opening and closing gate mechanism is controlled so that the plastic particles in the hopper can fall from the drop pipe to the three-way pipe by gravity, and drop from the two discharge ports into different packaging bags respectively. In this process, since the three-way pipe is rotatably connected to the drop pipe, and the flow rates of different discharge ports are also uncertain during dropping, the three-way pipe may tilt to one side during dropping, causing the drop speed on that side to accelerate. When the plastic particles in any packaging bag are filled to the point of contact with the corresponding discharge port, the three-way pipe will gradually tilt toward the direction of the other packaging bag. The plastic particles in the packaging bag are blocked by the contents of the packaging bag, so the plastic particles stop falling. The first switch gate mechanism is then controlled to block the falling of the hopper, and finally the lifting platform is lowered to its initial position, so that the two discharge ports of the tee pipe leave the bag openings of the two packaging bags respectively. In this process, the plastic particles remaining in the tee pipe fall into the corresponding packaging bags from the two discharge ports respectively. Compared with the prior art, the utility model can load two packaging bags in one process, improve the packaging efficiency of plastic particles, and realize fixed height filling of different packaging bags. Since the plastic particles in the packaging bag block the gravity falling of the hopper, the plastic particles in the packaging bag can be effectively compacted to meet the quantitative packaging requirements without weighing.

[0011] According to some embodiments of the present invention, specifically, the three-way pipe includes a connecting branch pipe and two discharge branch pipes, the connecting branch pipe is rotatably connected to the drop pipe, and the two discharge branch pipes are both provided with the discharge port.

[0012] According to some embodiments of the present invention, the two discharge branch pipes extend to both sides of the connecting branch pipe respectively, so that when the three-way pipe is rotated and tilted to either side, the discharge speed of the connecting branch pipe on that side is accelerated.

[0013] According to some embodiments of the present invention, the two discharge branch pipes are connected to form a straight pipe section. With this arrangement, when the tee pipe is rotated and tilted to either side, the straight pipe section becomes a single inclined surface, and the plastic particles flowing from top to bottom are guided by the single inclined surface and all fall to the inclined side.

[0014] According to some embodiments of the present invention, two first opening and closing gate mechanisms are provided, and the two first opening and closing gate mechanisms are respectively provided on the two discharge branch pipes. When the two discharge ports of the tee pipe leave the bag openings of the two packaging bags, in order to prevent all the plastic particles in the straight pipe section from falling to either side, the two first opening and closing gate mechanisms are required to close the connection between the straight pipe section and the two discharge ports, thereby ensuring that the two packaging bags receive the same weight of residual plastic particles.

[0015] According to some embodiments of the present invention, the connecting branch pipe is sleeved outside the blanking pipe, the inner circumference of the connecting branch pipe is provided with an inner ring groove, and the outer circumference of the blanking pipe is provided with an outer ring strip matching the inner ring groove, thereby realizing the rotational connection between the tee pipe and the blanking pipe.

[0016] According to some embodiments of the present invention, the blanking pipe is sleeved outside the connecting branch pipe, the inner circumference of the blanking pipe is provided with an inner ring groove, and the outer circumference of the connecting branch pipe is provided with an outer ring strip matching the inner ring groove, thereby realizing the rotational connection between the tee pipe and the blanking pipe.

[0017] According to some embodiments of the present invention, a lubrication space is reserved between the inner ring groove and the outer ring strip, and the lubrication space is used to store lubricant, so that the rotation of the tee pipe and the blanking pipe is smoother.

[0018] According to some embodiments of the present invention, in order to load packaging bags of different specifications, two lifting platforms are provided, and the two lifting platforms are independently controlled from each other so that two packages of different specifications have different height positions, thereby realizing fixed-height loading of different packaging bags.

[0019] According to some embodiments of the present invention, a second opening and closing gate mechanism is provided at the bottom of the silo. When the type of plastic pellets in the silo needs to be changed, the second opening and closing gate mechanism is controlled to open the bottom of the silo, thereby releasing all the plastic pellets in the silo.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the quantitative packaging system of the first embodiment of the present utility model;

[0023] Figure 2 yes Figure 1 A front view of the quantitative packaging system shown;

[0024] Figure 3 yes Figure 1 A side cross-sectional view of the quantitative packaging system shown;

[0025] Figure 4 This is a front cross-sectional view of the quantitative packaging system of the first embodiment of the present utility model;

[0026] Figure 5 It is a front view of the quantitative packaging system of the second embodiment of the present utility model.

[0027] In the accompanying drawings: 100- silo, 200- tee pipe, 300- lifting platform, 110- bracket, 120- drop pipe, 210- connecting branch pipe, 220- discharge branch pipe, 221- elbow, 211- inner ring groove, 121- outer ring strip, 201- lubrication space, 222- straight pipe section, 400- first switch gate mechanism, 310- table top, 500- packaging bag. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They 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 orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] like Figures 1 to 3 As shown, the quantitative packaging system according to the embodiment of the first aspect of the present invention includes a silo 100, a tee pipe 200 and a lifting platform 300. The silo 100 is used to store processed finished plastic particles. Due to the large size of the silo 100, only a portion of the structure of the silo 100 is shown in the accompanying drawings. The outer surface of the silo 100 is supported and connected to the ground by a bracket 110 to fix the position of the silo 100. The bottom of the silo 100 is provided with a downwardly inclined drop pipe 120. The drop pipe 120 is the main drop channel of the silo 100. Once the drop pipe 120 is connected to the outside world, the plastic particles in the silo 100 will fall along the drop pipe 120 under the action of gravity.

[0033] In addition, a second opening and closing gate mechanism (not shown) is provided at the bottom end of silo 100. This second opening and closing gate mechanism specifically comprises a second cylinder and a second gate plate, with the telescopic portion of the second cylinder connected to the second gate plate. When the bottom outlet of silo 100 needs to be closed, the second cylinder drives its second gate plate to extend to cover the bottom outlet of silo 100. At this time, the plastic pellets in silo 100 can only be discharged through the discharge pipe 120. When the type of plastic pellets in silo 100 needs to be changed, for example, when the silo 100 is insufficient and plastic pellets that are not yet shipped need to be transferred to meet current production orders, a storage container is first placed below silo 100. The second cylinder is then controlled to open the bottom outlet of silo 100. At this point, all the plastic pellets in silo 100 are discharged into the storage container through the bottom outlet, completing the emptying of silo 100. After silo 100 is emptied, the second cylinder is controlled to close the bottom outlet of silo 100.

[0034] It is understandable that the present invention does not limit the specific structure of the second switch gate mechanism, and those skilled in the art may also select other structural devices according to the function of the second switch gate mechanism, such as an electric push rod gate, a cylinder gate, etc.

[0035] On the other hand, the tee pipe 200 includes a connecting branch pipe 210 and two discharge branch pipes 220. The connecting branch pipe 210 is connected to the discharge pipe 120 via a rotating structure, allowing the tee pipe 200 to not only communicate with the discharge pipe 120 but also rotate along the central axis of the discharge pipe 120. The two discharge branch pipes 220 extend from the connecting branch pipe 210 to either side of the connecting branch pipe 210. Each discharge branch pipe 220 has an elbow 221, so that each discharge branch pipe 220 has a vertical downward discharge port.

[0036] like Figure 3As shown, specifically, to achieve rotational connection between the tee pipe 200 and the blanking pipe 120, a connecting branch pipe 210 is sleeved outside the blanking pipe 120. The inner circumference of the connecting branch pipe 210 is provided with an inner annular groove 211, and the outer circumference of the blanking pipe 120 is provided with an outer ring strip 121 that matches the inner annular groove 211. Both the inner annular groove 211 and the outer ring strip 121 have an arc structure. The connecting branch pipe 210 and the blanking pipe 120 rotate relative to each other through the mutual cooperation between the inner annular groove 211 and the outer ring strip 121. Under the mutual restriction of the inner annular groove 211 and the outer ring strip 121, the connecting branch pipe 210 and the blanking pipe 120 have only one degree of freedom of rotation, and the other degrees of freedom between the two are effectively restricted.

[0037] In other embodiments, in order to achieve a rotational connection between the tee pipe 200 and the blanking pipe 120, the blanking pipe 120 can also be arranged outside the connecting branch pipe 210. At this time, the inner circumference of the blanking pipe 120 is provided with an inner ring groove 211, and the outer circumference of the connecting branch pipe 210 is provided with an outer ring strip 121 matching the inner ring groove 211, and both the inner ring groove 211 and the outer ring strip 121 have an arc structure.

[0038] Regardless of which of the above-mentioned rotating connection structures is used between the tee pipe 200 and the blanking pipe 120, a lubrication space 201 is reserved between the inner ring groove 211 and the outer ring strip 121. The lubrication space 201 is used to store lubricant, such as lubricating butter, so that the rotation of the tee pipe 200 and the blanking pipe 120 is smoother.

[0039] Furthermore, in order to maintain the effectiveness of the lubricant in the lubrication space 201, the utility model provides a grease nozzle (not shown in the drawings) at the position of the inner ring groove 211, and maintenance personnel can use a grease gun to inject lubricating grease from the grease nozzle into the lubrication space 201.

[0040] Of course, the present invention does not specifically limit the rotational connection structure between the tee pipe 200 and the blanking pipe 120. As long as the tee pipe 200 and the blanking pipe 120 can rotate relative to each other, no matter what structure the rotational connection between the two is, it falls within the protection scope of the present invention.

[0041] like Figure 1 and Figure 2 As shown, the two discharge pipes 220 are connected to form a straight pipe section 222, and the tee 200 has a T-shaped structure. When the tee 200 is in a balanced state, the straight pipe section 222 is arranged in a horizontal direction. When the tee 200 is in an unbalanced state, that is, when the tee 200 rotates and tilts to either side, the straight pipe section 222 becomes a single inclined surface. Under the guidance of the single inclined surface, the plastic particles flowing from top to bottom all fall to the inclined side, and the opposite side temporarily stops falling.

[0042] In order to manually control the gravity discharge of the silo 100, each discharge branch pipe 220 is provided with a first switch gate mechanism 400. The first switch gate mechanism 400 specifically includes a first cylinder and a first gate plate, and the telescopic portion of the first cylinder is connected to the first gate plate. When the discharge port needs to be closed, the corresponding first cylinder drives its first gate plate to extend to block the discharge branch pipe 220; when the discharge port needs to be opened, the corresponding first cylinder drives its first gate plate to retract to restore the conduction of the discharge branch pipe 220. It should be noted that the two first switch gate mechanisms 400 are respectively located upstream of the elbows 221 of the two discharge branch pipes 220, thereby preventing the plastic particles in the straight pipe section 222 from flowing out to the discharge port.

[0043] It is understandable that the present invention does not limit the specific structure of the first switch gate mechanism 400. Those skilled in the art may also select other structural devices according to the function of the first switch gate mechanism 400, such as an electric push rod gate, a cylinder gate, etc.

[0044] Finally, there are two lifting platforms 300, each located below the two discharge ports. Each lifting platform 300 is provided with a table 310 that can be raised and lowered vertically. The table 310 is used to place the packaging bags 500 to be loaded. The lifting platforms 300 include, but are not limited to, scissor-type lifting devices, rack and pinion lifting devices, hydraulic cylinder lifting devices, and screw and nut lifting devices.

[0045] like Figure 4As shown, using the above structure, before loading, first, two packaging bags 500 are placed on the tables 310 of the two lifting platforms 300, and then the two lifting platforms 300 are controlled to raise the height of the two packaging bags 500 so that the two discharge ports of the tee pipe 200 are respectively located at the designated height positions of the two packaging bags 500. After preparation is completed, the two first opening and closing gate mechanisms 400 are controlled to allow the plastic particles in the silo 100 to fall from the drop pipe 120 to the tee pipe 200 by gravity, and then drop into different packaging bags 500 from the two discharge ports. During this process, since the tee pipe 200 is rotatably connected to the drop pipe 120 and the flow rate of the different discharge branch pipes 220 is also uncertain during the drop, there is a possibility that the tee pipe 200 will tilt to one side during the drop process. When the tee pipe 200 is rotated and tilted to either side, its straight section 222 becomes a single inclined surface. The plastic pellets flowing downward are guided by this single inclined surface and all fall into the packaging bag 500 on the inclined side, while the packaging bag 500 on the opposite side temporarily stops loading. When the plastic pellets in either packaging bag 500 are filled to the point where they contact the corresponding discharge port, the tee pipe 200 gradually tilts toward the other packaging bag 500, switching to the other packaging bag 500 for loading. Once both packaging bags 500 are filled to the point where they contact their corresponding discharge ports, the plastic pellets' descent is hindered by the contents of the packaging bags 500. Therefore, the tee pipe 200 maintains a balanced state on both sides, and the plastic pellets stop falling. After that, the two first switch gate mechanisms 400 are controlled to block the falling of materials from the silo 100, and finally the two lifting platforms 300 are lowered to the initial position so that the two discharge ports of the tee pipe 200 respectively leave the bag openings of the two packaging bags 500. During this process, the plastic particles remaining in the two elbows 221 fall from the two discharge ports into the corresponding packaging bags 500 respectively.

[0046] It should be noted that the reason why the two first switch gate mechanisms 400 are respectively arranged at the upstream position of the elbow 221 of the two discharge pipes 220 is to prevent all the plastic particles in the straight pipe section 222 from falling to any side when the two discharge ports of the tee pipe 200 leave the bag openings of the two packaging bags 500 respectively. Therefore, it is necessary to use the two first switch gate mechanisms 400 to close the connection between the straight pipe section 222 and the two discharge ports to ensure that the two packaging bags 500 can receive residual plastic particles of the same weight.

[0047] Compared to the prior art, the present invention can load two packaging bags 500 in a single process, improving the efficiency of plastic pellet packaging and achieving constant height loading for different packaging bags 500. Because the plastic pellets within the packaging bags 500 hinder the gravity drop of the silo 100, the plastic pellets within the packaging bags 500 can be effectively compacted, thereby meeting quantitative packaging requirements without weighing. The most significant difference between the present invention and the prior art is that, after determining the height position of the discharge port within the packaging bag 500, the filling height of the plastic pellets within the packaging bag 500 can be substantially maintained at the preset position during the subsequent filling process. Because the plastic pellets within the packaging bag 500 can be effectively compacted, the overall density of the same type of plastic pellets within different packaging bags 500 can be considered constant. Under the premise of a constant height and density, different packaging bags 500 with the same filling height have substantially similar weights, with a difference of no more than 1%.

[0048] Of course, if you need to control the weight of each packaging bag 500 more accurately, you can also weigh the packaging bag 500 after loading. The weighing sensor can be set on the table 310 of the lifting platform 300, and the nominal weight of each packaging bag 500 can be met by subtracting small amounts.

[0049] In some embodiments of the present invention, to accommodate different packaging specifications, the two lifting platforms 300 are independently controlled, allowing packages of two different specifications to be positioned at different heights, thereby achieving constant height loading of different packaging bags 500. For example, assume that there are two types of packaging bags 500, one type A and the other type B, where the height of type B bag 500 is less than that of type A bag 500. If the two lifting platforms 300 are controlled synchronously, then as the two lifting platforms 300 rise synchronously, when the corresponding discharge branch pipe 220 extends into the interior of type A bag 500, the other discharge branch pipe 220 has not yet extended into type B bag 500, thereby failing to achieve the technical effect of the present invention.

[0050] like Figure 5As shown, in other embodiments, the first switch gate mechanism 400 can also be installed in the discharge pipe 120 or the connecting branch pipe 210, with the two discharge branch pipes 220 forming an angle of less than 90°. During loading, when the tee 200 rotates and tilts to either side, the discharge speed of the discharge branch pipe 220 on that side increases, while the discharge speed of the discharge branch pipe 220 on the other side decreases. When the plastic pellets in any packaging bag 500 are filled to the point where they contact the corresponding discharge port, the tee 200 gradually tilts toward the other packaging bag 500 to facilitate the filling of the other packaging bag 500. As the tee 200 gradually tilts, the height of the discharge port on the side that has been filled will be slightly higher than the preset height due to the tilt of the tee 200. At this time, some plastic pellets can still fall from the discharge port on that side into the packaging bag 500, eventually causing the weight of the packaging bag 500 on that side to exceed the preset value, but the excess amount remains within a controllable range. The above embodiment can be regarded as a feasible implementation scheme of the present invention, but not as a preferred embodiment.

[0051] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. Quantitative packaging system, characterized in that: include: A material bin (100) is provided at the bottom with a material drop pipe (120) inclined downward; A three-way pipe (200), one end of which is rotatably connected to the drop pipe (120), and the other two ends of the three-way pipe (200) are respectively provided with discharge ports pointing vertically downward; A first switch gate mechanism (400), which is arranged on the drop pipe (120) or the three-way pipe (200); The lifting platform (300) is located below the two discharge ports, and the lifting platform (300) is provided with a tabletop (310) that can be lifted up and down.

2. The quantitative packaging system according to claim 1, characterized in that: The three-way pipe (200) comprises a connecting branch pipe (210) and two discharging branch pipes (220), wherein the connecting branch pipe (210) is rotatably connected to the drop pipe (120), and the two discharging branch pipes (220) are both provided with the discharging port.

3. The quantitative packaging system according to claim 2, characterized in that: The two discharge branch pipes (220) extend to both sides of the connecting branch pipe (210) respectively.

4. The quantitative packaging system according to claim 3, characterized in that: The two discharge branch pipes (220) are connected to form a straight pipe section (222).

5. The quantitative packaging system according to claim 4, characterized in that: Two of the first switch gate mechanisms (400) are provided, and the two first switch gate mechanisms (400) are respectively provided on the two discharge branch pipes (220).

6. The quantitative packaging system according to claim 2, characterized in that: The connecting branch pipe (210) is sleeved outside the blanking pipe (120), the inner circumference of the connecting branch pipe (210) is provided with an inner ring groove (211), and the outer circumference of the blanking pipe (120) is provided with an outer ring strip (121) matching the inner ring groove (211).

7. The quantitative packaging system according to claim 2, characterized in that: The blanking pipe (120) is sleeved outside the connecting branch pipe (210), the inner circumference of the blanking pipe (120) is provided with an inner annular groove (211), and the outer circumference of the connecting branch pipe (210) is provided with an outer annular strip (121) matching the inner annular groove (211).

8. The quantitative packaging system according to claim 6 or 7, characterized in that: A lubrication space (201) is reserved between the inner ring groove (211) and the outer ring strip (121).

9. The quantitative packaging system according to claim 1, characterized in that: Two lifting platforms (300) are provided, and the two lifting platforms (300) are controlled independently of each other.

10. The quantitative packaging system according to claim 1, characterized in that: A second opening and closing gate mechanism is provided at the lowermost end of the silo (100).

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