Material volume quantitative packaging device and method

Abstract

The invention discloses a material volume quantitative packaging device and method, and relates to the technical field of material volume quantitative packaging. The device comprises a rack, and a discharging unit, a feeding conveying belt, a bagging unit, a discharging leveling mechanism and a PLC are arranged on the rack. The discharging unit comprises a stock bin and a stirring mechanism, and the stock bin is provided with a vibration motor and a flow-aiding air disc for assisting discharging; the feeding conveying belt is driven by a servo motor; the bagging unit automatically clamps a bag opening through a bag clamping mechanism; and the discharged material leveling mechanism is used for leveling the materials. According to the device, all the components are controlled to work cooperatively through the PLC. The method comprises the steps of measuring the cross sectional area of the leveled materials, calculating the conveying distance of the feeding conveying belt and achieving quantitative packaging. The problems of inaccurate measurement, airflow interference and the like of easily compressed materials in the prior art are solved, the accuracy of material volume quantitative packaging is improved, and the actual production requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of material volumetric quantitative packaging, and in particular to a device and method for material volumetric quantitative packaging. Background Art

[0002] In the field of material volumetric quantitative packaging technology, most existing measurement and packaging methods use the rated volume method. Specifically, a cavity with a certain volume is set to accommodate the material to be measured or packaged. During the operation, the material is transported into the cavity, and the lower end discharge port is closed at the same time. When the material fills the entire cavity, the upper port is also closed, and then the lower end discharge port is opened to discharge the material, thereby completing a working cycle.

[0003] This traditional rated volume measurement method can achieve relatively accurate results for materials that are not easily compressed, such as particles and fertilizers, and has little impact on the measurement work. However, when faced with easily compressed materials, such as seedling substrates and organic fertilizers, it exposes obvious disadvantages. During the stacking process of these materials, the lower layer of materials is easily compressed by the pressure of the upper layer of materials, which in turn causes the specific gravity of the materials to increase, seriously affecting the accuracy of the measurement results, making it difficult for the final quantitative packaging to meet the expected standards.

[0004] In addition, the existing technology also has the problem of airflow interference. When the material enters the cavity, it will inevitably bring in airflow. Since the lower end outlet is in a closed state, the gas entering cannot be discharged smoothly and can only return along the entry path. This will not only form an unstable airflow environment in the cavity, but also have an adverse effect on the subsequent falling of the material, interfere with the normal filling and quantitative process of the material, and reduce the efficiency and accuracy of the entire material volume quantitative packaging.

[0005] In summary, the existing material volume quantitative packaging devices and methods have many defects and can no longer meet the needs of accurate measurement and packaging of easily compressible materials in actual production. Summary of the invention

[0006] The purpose of the present invention is to provide a device and method for volumetric quantitative packaging of materials, so as to solve the problems existing in the above-mentioned prior art and improve the accuracy of volumetric quantitative packaging of materials.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention provides a device for quantitative packaging of materials, comprising:

[0009] frame;

[0010] A discharging unit, the discharging unit comprises a silo and a stirring mechanism, the silo is fixedly mounted on the frame, the stirring mechanism comprises a stirring driving device, a stirring shaft and a plurality of stirring teeth arranged on the stirring shaft, the stirring shaft passes through the silo and rotates with the silo, all the stirring teeth are located in the silo, the stirring driving device is used to drive the stirring shaft to rotate, and a first discharging port is arranged at the bottom end of the silo;

[0011] A feeding conveyor belt, wherein the feeding conveyor belt is arranged on the frame, a driving device in the feeding conveyor belt adopts a servo motor, and a feeding end of the feeding conveyor belt is located directly below the first discharge port;

[0012] The bag filling unit comprises a feeding drum, a bag clamping nozzle and a bag clamping mechanism, the feeding drum is vertically fixed on the frame, the feeding conveyor belt is used to transport the materials into the feeding drum, the top opening of the bag clamping nozzle is connected with the bottom opening of the feeding drum, the bag clamping nozzle is used for the bag mouth of the packaging bag to be sleeved, the bag clamping mechanism comprises a clamping drive device, two clamping arms and two arc-shaped clamping rods, the clamping arms correspond to the arc-shaped clamping rods one by one, the top ends of the clamping arms are hinged to the clamping nozzle, the arc-shaped clamping rod is fixed to the bottom ends of the corresponding clamping arms, the two arc-shaped clamping rods are arranged opposite to each other and are respectively located on both sides of the clamping nozzle, the arc-shaped clamping rod is used to cooperate with the bag clamping nozzle to clamp the bag mouth of the packaging bag, the clamping drive device adopts a double-rod cylinder, one piston rod of the clamping drive device is hinged to one of the clamping arms, and the other piston rod is hinged to the other clamping arm;

[0013] A discharging and leveling mechanism, the discharging and leveling mechanism is used to level the material on the feeding conveyor belt;

[0014] A PLC programmable controller is used to control the opening and closing of the servo motor and the clamping drive device.

[0015] Preferably, a plurality of vibration motors are arranged on the side walls of the silo.

[0016] Preferably, a plurality of flow-aiding air discs are provided at the bottom of the silo.

[0017] Preferably, the discharge leveling mechanism adopts a brush, and the brush is arranged above the feeding conveyor belt, and there is a gap between the brush and the surface of the feeding conveyor belt.

[0018] Preferably, the discharging and leveling mechanism comprises a leveling drive device, a rotating shaft and a plurality of levers arranged on the rotating shaft, the leveling drive device is used to drive the rotating shaft to rotate, and the rotating shaft rotates in coordination with the silo.

[0019] Preferably, a base is fixedly provided on the outer wall of the silo corresponding to the rotating shaft, and the rotating shaft is rotatably matched with the base.

[0020] Preferably, it further comprises a cover body fixedly mounted on the frame, wherein the bottom of the silo and the feeding conveyor belt are both located in the cover body.

[0021] Preferably, a material blocking mechanism is also provided in the cover body, and the material blocking mechanism includes a baffle and a lifting drive device, the baffle is used to prevent the material at the discharge end of the feeding conveyor belt from falling, and the lifting drive device is used to drive the baffle to rise and fall; the lifting drive device adopts a hydraulic cylinder or a linear motor, and the lifting drive device is connected to the PLC programmable controller signal, and the PLC programmable controller can control the operation of the lifting drive device.

[0022] Preferably, the bag clamping mechanism further comprises a proximity switch, and the proximity switch is connected to the PLC programmable controller by signal. When the proximity switch is triggered, the PLC programmable controller controls the clamping drive device to drive the clamping arm to perform a clamping action.

[0023] The present invention also provides a method for quantitative packaging of material volume. Based on the above-mentioned device for quantitative packaging of material volume, the cross-sectional area of ​​the material on the feeding conveyor belt after being leveled by the discharging leveling mechanism is measured, and then the conveying distance of the feeding conveyor belt is calculated according to the required packaging volume and the cross-sectional area. The feeding conveyor belt is used to move the material by the conveying distance by controlling the rotation speed and working time of the servo motor, and the algorithm for realizing the conveying distance is written into the PLC programmable controller. The servo motor is controlled by the PLC programmable controller to drive the feeding conveyor belt to move the material by the conveying distance, thereby realizing the transportation of the material of the packaging volume.

[0024] Compared with the prior art, the present invention has achieved the following technical effects:

[0025] The device and method for volumetric quantitative packaging of materials of the present invention effectively solve the problems existing in the volumetric quantitative packaging of materials in the prior art by quantitatively conveying the materials before packaging, and significantly improve the accuracy of the volumetric quantitative packaging of materials.

[0026] Furthermore, the stirring mechanism in the discharging unit is composed of a stirring drive device, a stirring shaft and a plurality of stirring teeth. The stirring drive device drives the stirring shaft to rotate, driving the stirring teeth to stir the material in the silo. This design can effectively prevent the material from accumulating and agglomerating in the silo, keeping the material in a loose state, which is conducive to the smooth discharging of subsequent materials and improves the fluidity and uniformity of the material.

[0027] Furthermore, several vibration motors arranged on the side walls of the silo can make the silo vibrate when working; this vibration further promotes the flow of materials and prevents the materials from adhering to and accumulating on the silo walls. Especially for materials with high viscosity or prone to agglomeration, the effect of the vibration motor is more obvious, which helps to ensure that the materials can flow out smoothly from the first discharge port at the bottom of the silo.

[0028] Furthermore, a number of air discs arranged at the bottom of the silo can break the interaction force between materials by conveying airflow to the materials at the bottom of the silo, prevent the materials from forming a dead zone at the bottom of the silo, further improve the material discharge efficiency, and ensure that the materials can be discharged evenly and continuously from the first discharge port.

[0029] Furthermore, the driving device of the feeding conveyor belt adopts a servo motor, which, in conjunction with a PLC programmable controller, can achieve precise control of the running speed and conveying distance of the feeding conveyor belt. This is crucial for achieving quantitative packaging of material volume. By precisely controlling the speed and working time of the servo motor, the set volume of material can be accurately conveyed to the bagging unit, improving the accuracy and stability of quantitative packaging of materials.

[0030] Furthermore, the bag clamping mechanism of the bagging unit is ingeniously designed. The clamping drive device adopts a double-rod cylinder. Through the hinged connection between the piston rod and the clamping arm, it can quickly and stably drive the two clamping arms to drive the arc-shaped clamping rod to move, and cooperate with the bag clamping mouth to clamp the bag mouth of the packaging bag. This structural design ensures the tight clamping of the bag mouth, prevents material leakage during the bagging process, and improves the quality and efficiency of packaging.

[0031] Furthermore, the proximity switch provided in the bag clamping mechanism is connected to the PLC programmable controller signal. When the proximity switch is triggered, the PLC programmable controller can quickly control the clamping drive device to drive the clamping arm to perform the clamping action. This design realizes the automatic control of the bag clamping action, improves the degree of automation of the entire packaging process, and reduces the errors and labor intensity of manual operation.

[0032] Furthermore, if the discharge leveling mechanism adopts a brush, it is more suitable for powdered materials. It is arranged above the feeding conveyor belt and has a gap between it and the surface of the feeding conveyor belt. It can level the material on the feeding conveyor belt without damaging the conveyor belt, so that the material forms a flat surface on the conveyor belt, which is convenient for accurately measuring the cross-sectional area of ​​the material, and provides accurate basic data for the subsequent calculation of the conveying distance according to the packaging volume, thereby improving the accuracy of the quantitative packaging of the material volume.

[0033] Furthermore, when the discharging and leveling mechanism includes a leveling drive device, a rotating shaft and multiple levers, it is more suitable for materials with mixtures such as seedling substrates. The leveling drive device drives the rotating shaft to rotate, driving the levers to level the materials on the feeding conveyor belt; this form of leveling mechanism can more effectively handle different types of materials, enhance the leveling effect, ensure the accuracy of the measurement of the cross-sectional area of ​​the material, and further improve the accuracy of the volumetric quantitative packaging of the material.

[0034] Furthermore, the base fixed on the outer wall of the silo corresponding to the rotating shaft provides stable support for the rotating shaft, ensures the stability and reliability of the rotating shaft during rotation, extends the service life of the leveling mechanism, and ensures that the leveling work can be carried out continuously and stably.

[0035] Furthermore, the cover body fixed on the frame covers the bottom of the silo and the feeding conveyor belt inside, playing a protective and isolating role. On the one hand, it can prevent external impurities from entering the material conveying system to ensure the purity of the material; on the other hand, it can also reduce the flying dust generated during the material conveying process and improve the working environment.

[0036] Furthermore, the material blocking mechanism provided in the cover body is composed of a baffle and a lifting drive device; the lifting drive device adopts a hydraulic cylinder or a linear motor and is connected to the PLC programmable controller signal. When it is necessary to control the material conveying, the PLC programmable controller can control the lifting drive device to drive the baffle to rise and fall. The baffle can prevent the material from falling at the discharge end of the feeding conveyor belt, realize the precise control of material conveying, avoid the waste and unnecessary scattering of materials, and improve the efficiency and accuracy of quantitative packaging of materials.

[0037] Furthermore, based on the above device, by measuring the cross-sectional area of ​​the material on the feeding conveyor belt after being leveled by the discharging leveling mechanism, the conveying distance of the feeding conveyor belt is calculated according to the required packaging volume and cross-sectional area, and the algorithm is written into the PLC programmable controller, and the PLC programmable controller controls the servo motor to drive the feeding conveyor belt to move the material a corresponding conveying distance; this method solves the problem of material volume quantification in principle, and realizes precise control of material packaging volume through precise calculation and automatic control, avoiding the measurement error problem of traditional rated volume measurement method when facing easily compressible materials, greatly improving the accuracy and reliability of material volume quantitative packaging, and meeting the needs of accurate measurement and packaging of easily compressible materials in actual production. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 The structure of the device for quantitative packaging of materials according to the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0040] Figure 2 The structure of the device for quantitative packaging of materials according to the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0041] Figure 3 Schematic diagram of the partial structure of the device for quantitative packaging of materials according to the first embodiment of the present invention Figure 1 ;

[0042] Figure 4 Schematic diagram of the partial structure of the device for quantitative packaging of materials according to the first embodiment of the present invention Figure 2 ;

[0043] Figure 5 Schematic diagram of the partial structure of the device for quantitative packaging of materials according to the first embodiment of the present invention Figure 3 ;

[0044] Figure 6 Schematic diagram of the partial structure of the device for quantitative packaging of materials according to the first embodiment of the present invention Figure 4 ;

[0045] Figure 7 Schematic diagram of the partial structure of the device for quantitative packaging of materials according to the first embodiment of the present invention Figure 5 ;

[0046] In the figure: 100, device for quantitative packaging of material volume; 1, frame; 2, bagging unit; 201, bag clamping nozzle; 202, clamping arm; 203, arc-shaped clamping rod; 204, proximity switch; 205, feeding barrel; 206, double-rod cylinder; 3, feeding conveyor belt; 4, cover body; 5, material blocking mechanism; 6, stirring mechanism; 601, stirring drive device; 602, stirring teeth; 603, stirring shaft; 7, flow-aiding air disc; 8, discharge leveling mechanism; 801, lever; 802, rotating shaft; 803, base; 9, servo motor; 10, vibration motor; 11, silo. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The purpose of the present invention is to provide a device and method for volumetric quantitative packaging of materials, so as to solve the problems existing in the above-mentioned prior art and improve the accuracy of volumetric quantitative packaging of materials.

[0049] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Embodiment 1

[0051] like Figures 1 to 7 As shown, this embodiment provides a device 100 for quantitative packaging of materials by volume, comprising:

[0052] Rack 1;

[0053] The discharging unit includes a silo 11 and a stirring mechanism 6. The silo 11 is fixed on the frame 1. The stirring mechanism 6 includes a stirring drive device 601, a stirring shaft 603 and a plurality of stirring teeth 602 arranged on the stirring shaft 603. The stirring shaft 603 passes through the silo 11 and rotates with the silo 11. All the stirring teeth 602 are located in the silo 11. The stirring drive device 601 is used to drive the stirring shaft 603 to rotate. The bottom end of the silo 11 is provided with a first discharging port. The stirring mechanism 6 in the discharging unit is composed of a stirring drive device 601, a stirring shaft 603 and a plurality of stirring teeth 602. The stirring drive device 601 drives the stirring shaft 603 to rotate, and drives the stirring teeth 602 to stir the material in the silo 11. This design can effectively prevent the material from accumulating and agglomerating in the silo 11, so that the material remains in a loose state, which is conducive to the smooth discharging of subsequent materials and improves the fluidity of the material and the uniformity of the discharging;

[0054] A feeding conveyor belt 3, which is arranged on the frame 1. The driving device of the feeding conveyor belt 3 adopts a servo motor 9. The feeding end of the feeding conveyor belt 3 is located directly below the first discharge port;

[0055] The bagging unit 2 includes a feeding cylinder 205, a bag clamping nozzle 201 and a bag clamping mechanism. The feeding cylinder 205 is vertically fixed on the frame 1. The feeding conveyor belt 3 is used to transport the material into the feeding cylinder 205. The top opening of the bag clamping nozzle 201 is connected to the bottom opening of the feeding cylinder 205. The bag clamping nozzle 201 is used for the bag mouth of the packaging bag to be set. The bag clamping mechanism includes a clamping drive device, two clamping arms 202 and two arc-shaped clamping rods 203. The clamping arms 202 correspond to the arc-shaped clamping rods 203 one by one. The top of the clamping arm 202 is hinged with the clamping nozzle. The arc-shaped clamping rod 203 is fixed to the bottom end of the corresponding clamping arm 202. The two arc-shaped clamping rods 20 3 are arranged opposite to each other and are respectively located on both sides of the clamping mouth. The arc-shaped clamping rod 203 is used to cooperate with the bag clamping mouth 201 to clamp the bag mouth of the packaging bag. The arc-shaped clamping rod 203 is made of rubber. The clamping drive device adopts a double-rod cylinder 206. One piston rod of the clamping drive device is hinged to one clamping arm 202, and the other piston rod is hinged to the other clamping arm 202. The bag clamping mechanism of the bagging unit 2 is exquisitely designed. The clamping drive device adopts a double-rod cylinder 206. Through the hinge connection between the piston rod and the clamping arm 202, it can quickly and stably drive the two clamping arms 202 to drive the arc-shaped clamping rod 203 to move, and cooperate with the bag clamping mouth 201 to clamp the bag mouth of the packaging bag. This structural design ensures the tight clamping of the bag mouth of the packaging bag, prevents material leakage during the bagging process, and improves the quality and efficiency of packaging.

[0056] The material discharging and leveling mechanism 8 is used to level the material on the feeding conveyor belt 3;

[0057] PLC programmable controller, PLC programmable controller is used to control the opening and closing of the servo motor 9 and the clamping drive device.

[0058] In this embodiment, the driving device of the feeding conveyor belt 3 adopts a servo motor 9, which cooperates with a PLC programmable controller to achieve accurate control of the running speed and conveying distance of the feeding conveyor belt 3. This is crucial for achieving quantitative packaging of material volume. By accurately controlling the speed and working time of the servo motor 9, the set volume of material can be accurately conveyed to the bagging unit 2, thereby improving the accuracy and stability of quantitative packaging of materials.

[0059] It is worth noting that in this embodiment, the stirring teeth 602 and the stirring shaft 603 are detachably connected, specifically, they can be connected by bolts to facilitate installation and maintenance. In specific applications, the number of stirring mechanisms 6 can be adjusted according to actual needs. For example, 2 to 4 stirring mechanisms 6 can be added according to the material to ensure that the material can be completely stirred evenly. In addition, in order to adapt to the inverted cone structure at the bottom of the silo 11, the closer the stirring teeth 602 are to the middle of the stirring shaft 603, the longer the length is. Conversely, the farther the stirring teeth 602 are from the middle of the stirring shaft 603, the shorter the length is, that is, "long in the middle and short on both sides". This design can adapt to the inverted cone structure at the bottom of the silo 11, making it convenient to stir the material evenly.

[0060] In the optional scheme of this embodiment, it is more preferred that a plurality of vibration motors 10 are arranged on the side wall of the silo 11. The vibration motor 10 can make the silo 11 vibrate when working; this vibration further promotes the flow of materials, and prevents the materials from adhering to and accumulating on the wall of the silo 11. Especially for materials with high viscosity or easy to agglomerate, the effect of the vibration motor 10 is more obvious, which helps to ensure that the materials can smoothly flow out from the first discharge port at the bottom of the silo 11.

[0061] In the optional scheme of this embodiment, it is more preferred that a plurality of flow-aiding air discs 7 are provided at the bottom of the silo 11. The flow of air from the flow-aiding air discs 7 to the material at the bottom of the silo 11 can break the interaction force between the materials, prevent the materials from forming a dead zone at the bottom of the silo 11, further improve the material discharge efficiency, and ensure that the materials can be discharged uniformly and continuously from the first discharge port. The flow-aiding air discs 7 are commercially available products well known in the art, and the specific structure and working principle of the flow-aiding air discs 7 will not be elaborated in this embodiment.

[0062] It is worth noting that different discharging and leveling mechanisms 8 need to be selected according to different materials. In this embodiment, two different discharging and leveling mechanisms 8 are provided, specifically:

[0063] ① The discharging and leveling mechanism 8 adopts a brush, which is arranged above the feeding conveyor belt 3, and there is a gap between the brush and the surface of the feeding conveyor belt 3. The brush is suitable for powdered materials; the discharging and leveling mechanism 8 adopts a brush, which is arranged above the feeding conveyor belt 3 and there is a gap between the brush and the surface of the feeding conveyor belt 3. It can level the material on the feeding conveyor belt 3 without damaging the conveyor belt, so that the material forms a flat surface on the conveyor belt, which is convenient for accurately measuring the cross-sectional area of ​​the material, and provides accurate basic data for the subsequent calculation of the conveying distance according to the packaging volume, thereby improving the accuracy of the quantitative packaging of the material volume.

[0064] ② The discharging and leveling mechanism 8 includes a leveling drive device, a rotating shaft 802 and a plurality of levers 801 arranged on the rotating shaft 802. The axial direction of the lever 801 is perpendicular to the axial direction of the rotating shaft 802. The lever 801 can specifically be made of steel bars. The leveling drive device is used to drive the rotating shaft 802 to rotate, and the rotating shaft 802 cooperates with the silo 11 to rotate; the lever 801 is suitable for materials with mixtures such as seedling substrates; when the discharging and leveling mechanism 8 includes a leveling drive device, a rotating shaft 802 and a plurality of levers 801, the leveling drive device drives the rotating shaft 802 to rotate, driving the lever 801 to level the material on the feeding conveyor belt 3; this form of leveling mechanism can more effectively handle different types of materials, enhance the leveling effect, ensure the accuracy of the measurement of the cross-sectional area of ​​the material, and further improve the accuracy of the quantitative packaging of the material volume.

[0065] In the optional scheme of this embodiment, it is more preferred that a base 803 is fixedly provided on the outer wall of the silo 11 corresponding to the rotating shaft 802, and the rotating shaft 802 rotates with the base 803; the base 803 provides stable support for the rotating shaft 802, ensures the stability and reliability of the rotating shaft 802 during the rotation process, extends the service life of the leveling mechanism, and ensures that the leveling work can be carried out continuously and stably.

[0066] In the optional scheme of this embodiment, it is more preferred to further include a cover body 4 fixed on the frame 1, and the bottom of the silo 11 and the feeding conveyor belt 3 are both located in the cover body 4; the cover body 4 covers the bottom of the silo 11 and the feeding conveyor belt 3 inside, playing a role of protection and isolation. On the one hand, it can prevent external impurities from entering the material conveying system and ensure the purity of the material; on the other hand, it can also reduce the flying dust generated during the material conveying process and improve the working environment.

[0067] In the optional scheme of this embodiment, it is more preferred that a material blocking mechanism 5 is also provided in the cover body 4, and the material blocking mechanism 5 includes a baffle and a lifting drive device, the baffle is used to block the material at the discharge end of the feeding conveyor belt 3 from falling, and the lifting drive device is used to drive the baffle to rise and fall; the lifting drive device adopts a hydraulic cylinder or a linear motor, and the lifting drive device is connected to the PLC programmable controller signal, and the PLC programmable controller can control the operation of the lifting drive device; when it is necessary to control material transportation, the PLC programmable controller can control the operation of the lifting drive device and drive the baffle to rise and fall, so that the baffle blocks or does not block the material at the discharge end of the feeding conveyor belt 3 from falling, thereby realizing precise control of material transportation, avoiding waste and unnecessary scattering of materials, and improving the efficiency and accuracy of quantitative packaging of materials.

[0068] In the optional scheme of this embodiment, it is more preferred that the bag clamping mechanism further includes a proximity switch 204, and the proximity switch 204 is connected to the PLC programmable controller signal. When the proximity switch 204 is triggered, the PLC programmable controller controls the clamping drive device to drive the clamping arm 202 to perform a clamping action. The proximity switch 204 provided in the bag clamping mechanism is connected to the PLC programmable controller signal. When the proximity switch 204 is triggered, the PLC programmable controller can quickly control the clamping drive device to drive the clamping arm 202 to perform a clamping action; this design realizes the automatic control of the bag clamping action, improves the automation degree of the entire packaging process, and reduces the error and labor intensity of manual operation.

[0069] The working principle of the device 100 for quantitative packaging of materials by volume in this embodiment is as follows:

[0070] During operation, the material is stored in the silo 11 fixed on the frame 1, and the stirring drive device 601 of the stirring mechanism 6 drives the stirring shaft 603 and the stirring teeth 602 to rotate and stir the material. At the same time, the vibration motor 10 on the side wall of the silo 11 and the flow-aiding air disc 7 at the bottom assist the material to be discharged smoothly from the first discharge port at the bottom and fall on the feeding conveyor belt 3 below. The feeding conveyor belt 3 is driven by the servo motor 9 and operates under the control of the PLC programmable controller. The discharge leveling mechanism 8 levels the material on the conveyor belt through a brush or a lever 801 to accurately measure the cross-sectional area of ​​the material. The feeding barrel 205 of the bagging unit 2 is vertically fixed on the frame 1, and the feeding conveyor belt 3 conveys the material into the feeding barrel 205. When the packaging bag is put on the bag clamping nozzle 201, the staff triggers the proximity switch 204, and the PLC programmable controller controls the clamping drive device to drive the clamping arm 202 to drive the arc-shaped clamping rod 203 to cooperate with the bag clamping nozzle 201 to clamp the bag mouth. The cover body 4 protects and isolates the bottom of the silo 11 and the feeding conveyor belt 3. The material blocking mechanism 5 in the cover body 4 is controlled by a PLC programmable controller to lift and lower the baffle to accurately control material transportation. Finally, the PLC programmable controller controls the coordinated operation of various components based on the preset algorithm and the packaging volume and material cross-sectional area to complete the volumetric quantitative packaging of the material.

[0071] Embodiment 2

[0072] This embodiment provides a method for quantitative packaging of materials by volume, based on the device 100 for quantitative packaging of materials by volume in the first embodiment, specifically:

[0073] Measure the cross-sectional area of ​​the material on the feeding conveyor belt 3 after being leveled by the discharging leveling mechanism 8, and then calculate the conveying distance of the feeding conveyor belt 3 according to the required packaging volume and the cross-sectional area. The feeding conveyor belt 3 is used to move the material for the conveying distance by controlling the rotation speed and working time of the servo motor 9. The algorithm for realizing the conveying distance is written into the PLC programmable controller, and the servo motor 9 is controlled by the PLC programmable controller to drive the feeding conveyor belt 3 to move the material for the conveying distance, thereby realizing the transportation of the material with the packaging volume.

[0074] In this embodiment, the cross-sectional area of ​​the material on the feeding conveyor belt 3 after being leveled by the discharging leveling mechanism 8 is measured, and then the conveying distance of the feeding conveyor belt 3 is calculated according to the required packaging volume and the cross-sectional area, and the algorithm is written into the PLC programmable controller, and the PLC programmable controller controls the servo motor 9 to drive the feeding conveyor belt 3 to move the material to the corresponding conveying distance; this method solves the problem of material volume quantification in principle, and realizes precise control of the material packaging volume through precise calculation and automatic control, avoiding the measurement error problem of the traditional rated volume measurement method when facing easily compressible materials, greatly improving the accuracy and reliability of material volume quantitative packaging, and meeting the needs of accurate measurement and packaging of easily compressible materials in actual production.

[0075] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A device for quantitative packaging of materials, characterized in that: include: frame; A discharging unit, the discharging unit comprises a silo and a stirring mechanism, the silo is fixedly mounted on the frame, the stirring mechanism comprises a stirring driving device, a stirring shaft and a plurality of stirring teeth arranged on the stirring shaft, the stirring shaft passes through the silo and rotates with the silo, all the stirring teeth are located in the silo, the stirring driving device is used to drive the stirring shaft to rotate, and a first discharging port is arranged at the bottom end of the silo; A feeding conveyor belt, wherein the feeding conveyor belt is arranged on the frame, a driving device in the feeding conveyor belt adopts a servo motor, and a feeding end of the feeding conveyor belt is located directly below the first discharge port; The bag filling unit comprises a feeding drum, a bag clamping nozzle and a bag clamping mechanism, the feeding drum is vertically fixed on the frame, the feeding conveyor belt is used to transport the materials into the feeding drum, the top opening of the bag clamping nozzle is connected with the bottom opening of the feeding drum, the bag clamping nozzle is used for the bag mouth of the packaging bag to be sleeved, the bag clamping mechanism comprises a clamping drive device, two clamping arms and two arc-shaped clamping rods, the clamping arms correspond to the arc-shaped clamping rods one by one, the top ends of the clamping arms are hinged to the clamping nozzle, the arc-shaped clamping rod is fixed to the bottom ends of the corresponding clamping arms, the two arc-shaped clamping rods are arranged opposite to each other and are respectively located on both sides of the clamping nozzle, the arc-shaped clamping rod is used to cooperate with the bag clamping nozzle to clamp the bag mouth of the packaging bag, the clamping drive device adopts a double-rod cylinder, one piston rod of the clamping drive device is hinged to one of the clamping arms, and the other piston rod is hinged to the other clamping arm; A discharging and leveling mechanism, the discharging and leveling mechanism is used to level the material on the feeding conveyor belt; A PLC programmable controller is used to control the opening and closing of the servo motor and the clamping drive device.

2. The device for quantitative packaging of materials according to claim 1, characterized in that: A plurality of vibration motors are arranged on the side wall of the silo.

3. The device for quantitative packaging of materials according to claim 1, characterized in that: A plurality of flow-aiding air discs are arranged at the bottom of the silo.

4. The device for quantitative packaging of materials according to claim 1, characterized in that: The discharging and leveling mechanism adopts a brush, and the brush is arranged above the feeding conveyor belt, and there is a gap between the brush and the surface of the feeding conveyor belt.

5. The device for quantitative packaging of materials according to claim 1, characterized in that: The discharging and leveling mechanism comprises a leveling driving device, a rotating shaft and a plurality of levers arranged on the rotating shaft. The leveling driving device is used to drive the rotating shaft to rotate, and the rotating shaft is rotatably matched with the silo.

6. The device for quantitative packaging of materials according to claim 5, characterized in that: A base is fixedly provided on the outer wall of the silo corresponding to the rotating shaft, and the rotating shaft is rotatably matched with the base.

7. The device for quantitative packaging of materials according to claim 1, characterized in that: It also includes a cover body fixed on the frame, and the bottom of the silo and the feeding conveyor belt are both located in the cover body.

8. The device for quantitative packaging of materials according to claim 7, characterized in that: A material blocking mechanism is also provided in the cover body, and the material blocking mechanism includes a baffle and a lifting drive device, the baffle is used to block the material at the discharge end of the feeding conveyor belt from falling, and the lifting drive device is used to drive the baffle to rise and fall; the lifting drive device adopts a hydraulic cylinder or a linear motor, and the lifting drive device is connected to the PLC programmable controller signal, and the PLC programmable controller can control the operation of the lifting drive device.

9. The device for quantitative packaging of materials according to claim 1, characterized in that: The bag clamping mechanism also includes a proximity switch, which is connected to the PLC programmable controller by signal. When the proximity switch is triggered, the PLC programmable controller controls the clamping drive device to drive the clamping arm to perform a clamping action.

10. A method for quantitative packaging of materials, characterized in that: Based on the device for quantitative packaging of material volume as described in any one of claims 1 to 9, the cross-sectional area of ​​the material on the feeding conveyor belt after being leveled by the discharging leveling mechanism is measured, and then the conveying distance of the feeding conveyor belt is calculated by the required packaging volume and the cross-sectional area, and the feeding conveyor belt is enabled to move the material by the conveying distance by controlling the rotation speed and working time of the servo motor, and the algorithm for achieving the conveying distance is written into the PLC programmable controller, and the servo motor is controlled by the PLC programmable controller to drive the feeding conveyor belt to move the material by the conveying distance, thereby realizing the transportation of the material of the packaging volume.

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