A precise weighing and packaging system

Abstract

This invention discloses a precise weighing and packaging system, including control equipment, and further comprising: a frame; a fast and slow feeding device mounted above the frame; a quantitative weighing device positioned directly below the fast and slow feeding device and located inside the frame; and bag securing devices symmetrically arranged on both sides of the quantitative weighing device. The fast and slow feeding device includes a feeding hopper, a material blocking device, and a material equalization device. This invention is safe, reliable, and highly stable, solving the problems of frequent start-stop of material conveyors, discontinuous production processes, lengthy production steps, high manual labor requirements, and extremely low work efficiency. It also solves the problem of uncontrollable feeding accuracy caused by the high conveying speed of material conveying equipment; and simultaneously solves the problem of spillage during bagging caused by material deviation and eccentric accumulation, thus meeting the weighing and packaging requirements of tobacco stems in tobacco processing and re-drying production lines.

Description

Technical Field

[0001] This invention relates to a weighing and packaging system, specifically a precise weighing and packaging system, belonging to the field of tobacco packaging technology. Background Technology

[0002] Generally, in the tobacco stem processing section of the tobacco processing and re-drying production line, the weighing and packaging of tobacco stems is usually done using a metering hopper. Although this type of weighing and packaging process may use automatic weighing and bagging, the material weighing process is still manually operated. In particular, after each weighing, the conveyor needs to be stopped to continue feeding material into the metering hopper. Once the metering hopper has filled the material into the packaging bag, the conveyor restarts to feed the material into the metering hopper. This frequent start-stop cycle makes the whole process discontinuous, the production process lengthy, requires a lot of manual labor, consumes a lot of space, and has extremely low work efficiency. In addition, because the conveying equipment has a relatively high conveying speed, the material cannot be accurately controlled, resulting in low metering accuracy.

[0003] The weighing and packaging of tobacco stems presents a series of problems, including frequent equipment start-ups and shutdowns, discontinuous processes, lengthy production steps, high labor requirements, extremely low work efficiency, and low measurement accuracy. Currently, there is no better solution.

[0004] Currently, Chinese utility model patent CN 217598880 U discloses an automatic packaging system, including a dispensing box (1), a main support (17) fixedly installed on the bottom surface of the dispensing box (1), a feeding hopper (2) fixedly installed on the top surface of the dispensing box (1), a first solenoid valve (4) provided at the bottom of the feeding hopper (2), a first support leg (5) fixedly installed on the bottom surface inside the dispensing box (1), an electric push rod (6) hinged to the bottom surface inside the dispensing box (1), a weighing platform (7) hinged to the output end of the electric push rod (6), and the top surface of the first support leg (5) hinged to the weighing platform (7), a weighing box (8) fixedly installed on the top surface of the weighing platform (7), a pressure sensor provided at the bottom of the weighing box (8), and the weighing box (8) The weighing box (8) has a second solenoid valve (9) on the front and a guide groove (10) fixedly installed on the front. The main support (17) has a base (11) in front and a second support leg (12) fixedly installed on the top surface of the base (11). A motor (13) is fixedly installed on the front of the second support leg (12). A drive shaft (14) is fixedly connected to the output end of the motor (13). A fixed plate (15) is fixedly installed on the back of the drive shaft (14). A weighing hopper (16) is fixedly installed on the surface of the fixed plate (15). A pressure sensor is provided on the bottom surface of the base (11). A material discharge bucket (18) is provided on the right side of the second support leg (12), and a bagging mechanism is provided on the left side of the second support leg (12). Although this patent can weigh materials, the structure of the above patent is complex, and there are still errors when weighing. The operation is cumbersome and inconvenient.

[0005] Therefore, the key to solving the above-mentioned technical problems lies in developing a simple, efficient, and accurate weighing and packaging system. Summary of the Invention

[0006] In view of the many defects and shortcomings of the above-mentioned background technology, the present invention has made improvements and innovations, aiming to provide a safe, reliable, and highly stable accurate weighing and packaging system, which effectively solves the problems of frequent start-stop of material conveyors, discontinuous production process, long production links, high manual labor requirements, and extremely low work efficiency, and meets the weighing and packaging requirements of tobacco stems in tobacco processing leaf threshing and re-drying production lines.

[0007] Another objective of this invention is to solve the problem of uncontrollable and low feeding accuracy caused by the high conveying speed of material conveying equipment; at the same time, it can also effectively solve the problem of material deviation and bagging spillage caused by eccentric accumulation of materials, thereby improving the flexibility and convenience of system operation.

[0008] To solve the above problems and achieve the above-mentioned objectives, the present invention provides a precise weighing and packaging system by adopting the following design structure and the following technical solution:

[0009] This invention addresses the issue of weighing and packaging tobacco stems in tobacco re-drying plants. It effectively solves the problems of frequent start-stop cycles of material conveyors, discontinuous production processes, lengthy production steps, high labor costs, and extremely low work efficiency. It also solves the problem of uncontrollable and low feeding accuracy caused by the high speed of material conveying equipment. Furthermore, it effectively solves the problem of spillage during bagging caused by material deviation and eccentric accumulation.

[0010] As an improvement to the accurate weighing and packaging system of the present invention, it includes a control device (5) for real-time control of the operation of the weighing and packaging system, and further includes:

[0011] Rack (1);

[0012] Fast and slow feeding device (2) is installed above the frame (1);

[0013] A quantitative weighing device (3) is set directly below the fast and slow feeding device (2) and is located inside the frame (1).

[0014] The bag fixing device (4) is symmetrically arranged on both sides of the quantitative weighing device (3);

[0015] Among them, the control device (5) is located on the lower side of the frame (1); the fast and slow feeding device (2) includes a feeding hopper (21), a material blocking device (22), and a material equalization device (23) arranged sequentially from top to bottom.

[0016] As an improvement of the present invention described above, the feed hopper (21) includes:

[0017] The feeding hopper (211) has a feeding hopper connecting plate that is adapted to be installed on the outside of the feeding hopper (211);

[0018] The feeding hopper (212) is located directly below the feeding hopper (211);

[0019] A rotating guide plate (213) is rotatably connected to the upper inner side of the feeding hopper (211);

[0020] A rotary driver (214) is connected to an outer end above the hopper (211), and the output shaft of the rotary driver (214) is connected to the end of the rotary guide plate (213) at that end.

[0021] The middle partition (215) is connected inside the feeding hopper (211) and is located below the rotating guide plate (213);

[0022] The rotary drive (214) is connected to the control device (5).

[0023] As a further improvement of the present invention, the two ends of the feeding hopper (212) are provided with bent connecting parts, and the two end plates of the feeding hopper (212) are lower than the height of the two side plates.

[0024] The intermediate partition (215) is located at 2 / 3 of the position of the two end plates of the feeding hopper (211), and the intermediate partition (215) is arranged parallel to the two side plates of the feeding hopper (211).

[0025] The rotating guide plate (213) is disposed above the intermediate partition plate (215);

[0026] Among them, the volume of the left cavity of the feeding hopper (211) is larger than the filling volume of the packaging bag (6); there is also a working gap between the feeding hopper (211) and the unloading hopper (212).

[0027] As a further improvement of the present invention, the material blocking device (22) is connected between the upper hopper (211) and the lower hopper (212);

[0028] The material stop device (22) includes:

[0029] The feeder frame (221) is connected to the frame (1) above the four corners of the feeder frame (221) by support legs. The upper middle part of the feeder frame (221) is detachably connected to the upper hopper connecting plate corresponding to the upper hopper (211). The lower middle part of the feeder frame (221) is detachably connected to the bent connecting part of the lower hopper (212).

[0030] The baffle guide rail (222) is symmetrically connected to both sides inside the feed frame (221);

[0031] The left baffle plate (223) is slidably connected to the left end between the two baffle plate guide rails (222);

[0032] The right baffle plate (224) is slidably connected to the right end between the two baffle plate guide rails (222);

[0033] The left drive (225) is connected to the middle of the left outer end of the feed frame (221). The drive rod of the left drive (225) passes through the feed frame (221) and is connected to the left baffle (223) through the left baffle connector.

[0034] The right drive (226) is connected to the middle of the right outer end of the feed frame (221). The drive rod of the right drive (226) passes through the feed frame (221) and is connected to the right baffle (224) through the right baffle connector.

[0035] The left driver (225) and the right driver (226) are both connected to the control device (5).

[0036] As a further improvement of the present invention, the material leveling device (23) is disposed directly below the feed frame (221), and the material leveling device (23) includes:

[0037] The discharge hopper (231) has discharge hopper connecting plates symmetrically connected to the upper part of both ends of the discharge hopper (231), and multiple discharge hopper connecting holes are also provided at the lower part of the discharge hopper (231).

[0038] The material distribution roller (232) is equidistantly rotatably connected to the upper part of the discharge hopper (231);

[0039] The output shaft of each material distribution roller driver (233) is connected to the end of the corresponding material distribution roller (232);

[0040] Among them, the material equalization device (23) is connected to the feed frame (221) through the discharge hopper connecting plate and the locking part, and each material equalization roller driver (233) is connected to the control equipment (5).

[0041] As a further improvement of the present invention, the quantitative weighing device (3) is mounted on the middle cross brace of the frame (1), and the quantitative weighing device (3) includes:

[0042] A loading hopper (31) is connected below a discharge hopper (231);

[0043] A hopper fixing bracket (32) is provided in the upper part of the hopper (31);

[0044] Weighing sensors (33) are respectively installed at the lower corners of the four corners of the hopper fixing bracket (32);

[0045] The hopper limiting support (34) is respectively set on one side of the weighing sensor (33);

[0046] Each weighing sensor (33) is connected to the control device (5).

[0047] As a further improvement of the present invention, the upper part of the loading hopper (31) is connected to the lower part of the discharge hopper (231) by a soft curtain through a soft curtain connecting hole;

[0048] The two sides of the fixed support bracket (32) are provided with a fixed bag device mounting seat that is adapted to and connected to the fixed bag device (4); the two ends of the fixed support bracket (32) are also provided with a weighing sensor connection hole adapted to and connected to the weighing sensor (33) and a limit support connection hole adapted to and connected to the hopper limit support (34).

[0049] As a further improvement of the present invention, one end of the weighing sensor (33) is detachably installed below the weighing sensor connection hole, and the other end is connected to the middle cross brace of the frame (1) through the weighing sensor connection plate.

[0050] The hopper limiting support (34) is symmetrically arranged between two weighing sensors (33) at each end. The hopper limiting support (34) includes: a limiting connecting plate, one end of which is connected to the middle cross brace of the frame (1); a limiting adjusting component, which includes an adjusting bolt and at least two limiting nuts threaded onto the adjusting bolt. One end of the adjusting bolt is connected to the middle of the upper surface of the other end of the limiting connecting plate. The head of the adjusting bolt is located above the connecting hole of the limiting support, and the limiting nut is located below the connecting hole of the limiting support. The diameter of the limiting nut is larger than the diameter of the connecting hole of the limiting support. A gap is left between the limiting nut and the hopper fixing bracket (32).

[0051] As a further improvement of the present invention, the bag securing device (4) is used to secure the packaging bag (6), and the bag securing device (4) includes:

[0052] Connecting ear (41) is connected to the bottom of the bag fixing device mounting seat of the hopper fixing bracket (32);

[0053] A clamping driver (42) is connected below the connecting lug (41);

[0054] The clamping rod (43) has one end hinged to the output shaft of the clamping driver (42) via a connector, and the middle part of the clamping rod (43) is rotatably connected to the hopper (31) via a bag fixing seat.

[0055] The clamping seat (44) is hinged to the other end of the clamping connecting rod (43);

[0056] The clamping driver (42) is connected to the control device (5).

[0057] As a further improvement to the present invention, the connecting ear (41) and the pressing driver (42) are connected by a hinge seat;

[0058] The pressing link (43) is a bent link with an obtuse angle as a whole, and the bent part of the pressing link (43) is rotatably connected to the fixed bag connecting seat through the connecting shaft;

[0059] The clamping seat (44) is generally in the shape of a long strip, and the clamping end of the clamping seat (44) is connected to a pressure plate;

[0060] The clamping seat (44) has multiple through holes along its length.

[0061] The working principle is as follows: Before using the above-mentioned precise measurement weighing and packaging system, the present invention first obtains the weight of the quantitative weighing device (3) through the weighing sensor (33) and presets it to 0; when material (7) enters the packaging bag (6), the instantaneous weight obtained by the weighing sensor (33) is the weight of the material (7), which is the weighing process.

[0062] Before operation, the operator first presets the left baffle (223) to close when the bag weight reaches G through the control device (5); if the weighing sensor (33) detects that the total weight reaches G, the weighing sensor (33) will output a signal to the control device (5), and the control device (5) will immediately send an instruction to the left driver (225) to close the left baffle (223) upon receiving this signal; at the same time, as long as there is material (7) entering the packaging bag (6), the weighing sensor (33) can automatically weigh it in real time, which is a continuous process;

[0063] The operator can preset three weight values ​​in advance by controlling the equipment (5): the first weight value is the weight Q of the packaged bag (6);

[0064] The second weight value is G, which is 80-90% of the full bag weight Q. At this time, it means that the packaging bag (6) is almost full, and the left baffle (223) needs to be closed to allow slow feeding.

[0065] The third weight value is a stable feed rate in the slow feed zone (for example, if a feed rate of 1 kg / s is required, then the scanning cycle of the weighing sensor (33) is 1 second, and does this 1 second increase the weight by 1 kg?). This feed rate is controlled by driving the rotating guide plate (213) to rotate left and right, which plays a role in stabilizing the feed process.

[0066] During operation, when the weight reaches the first weight value, the weighing sensor (33) will output a signal to the control device (5). Upon receiving this signal, the control device (5) will immediately issue an instruction to the right driver (226) to close the right baffle (224) and stop feeding. The control device (5) controls the clamping driver (42) to drive the clamping seat (44) to loosen the packaging bag (6). At the same time, the feed hopper (21) of the fast and slow feeding device (2) is buffering the material (7). After the packaging bag (6) is changed, the control device (5) controls the clamping driver (42) to drive the clamping seat (44) to clamp the packaging bag (6). Then, the control device (5) controls the left driver (225) and the right driver (226) to quickly open the left baffle (223) and the right baffle (224). The material (7) buffered in the feed hopper (21) quickly enters the new packaging bag (6). The weighing process is continuous.

[0067] The beneficial effects of this invention compared to the prior art are:

[0068] 1. Compared with conventional metering hopper feeding methods, this invention avoids frequent start-stop cycles, ensures continuous production, simplifies production processes, reduces manual labor, minimizes space requirements, increases work efficiency, provides precise control over the feeding amount, and achieves high metering accuracy.

[0069] 2. The middle partition of the present invention divides the feed hopper into two parts. When feeding slowly, the left baffle is closed and the left cavity buffers the feed. The rotary drive is controlled by the control device to drive the rotary guide plate to rotate left and right, control the feed amount, ensure stable addition of feed amount, accurate feed amount control, and high metering accuracy.

[0070] 3. The material blocking device of the present invention can close the left cavity under the control of the control equipment, reduce the amount of material bagged, ensure the continuous feeding of the feeding equipment, and avoid frequent start-stop;

[0071] 4. The material distribution device of the present invention can effectively solve the problem of bagging spillage caused by material deviation and eccentric accumulation.

[0072] 5. This invention uses a combination of fast and slow feeding devices and a quantitative weighing device to precisely control the loaded material, providing very accurate measurement results with small errors. This saves labor, reduces the workload of operators, and avoids errors that occur in manual weighing.

[0073] 6. The quantitative weighing device of the present invention weighs materials through a weighing sensor, which can detect the weight of materials in real time and automatically feed the data back to the control system, reducing errors and delays in manual operation, and can quickly respond to weight changes, which helps to improve the flexibility and convenience of system operation.

[0074] 7. The bag fixing device of the present invention can quickly and stably complete the fixing of packaging bags, avoiding delays that may occur during manual operation, and can also automatically and continuously run at high speed, thereby significantly improving the production efficiency of the entire filling process.

[0075] 8. The fast and slow feeding device of the present invention adopts the design of fast feeding zone and slow feeding zone. According to the feeding state, the feeding amount can be adjusted by setting a rotary drive and a baffle device through the control equipment to optimize the feeding process.

[0076] 9. The material equalization device of this invention rotates reasonably through control equipment, which helps to reduce the impact of rapid material falling on the weighing sensor, maintain the stability of material supply in the system, and reduce production stagnation or efficiency decline caused by fluctuations in material feeding.

[0077] 10. The hopper limiting support of the present invention can effectively protect the stability of the quantitative weighing device and prevent the hopper from falling or tilting downwards when its overall weight exceeds the load-bearing range of the weighing sensor during operation, thereby avoiding damage to the quantitative weighing device and other components and ensuring the safety and accuracy of the system. Attached Figure Description

[0078] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0079] Figure 1 This is one of the usage state diagrams of the present invention;

[0080] Figure 2 This is the second usage state diagram of the present invention;

[0081] Figure 3 This is one of the overall structural schematic diagrams of the present invention;

[0082] Figure 4 This is the second schematic diagram of the overall structure of the present invention;

[0083] Figure 5 This is a partial structural schematic diagram of the present invention;

[0084] Figure 6 This is one of the schematic diagrams showing the partial structural connection relationships of the present invention;

[0085] Figure 7 This is the second schematic diagram of the partial structural connection relationship of the present invention;

[0086] Figure 8 This is a schematic diagram of the structure of the fast and slow feeding device (2) component of the present invention;

[0087] Figure 9 This is a right view of the slow feed device (2) component of the present invention;

[0088] Figure 10 This is a schematic diagram of the structure of the feed hopper (21) component of the present invention;

[0089] Figure 11 This is a schematic diagram of the structure of the material blocking device (22) component of the present invention;

[0090] Figure 12 This is a schematic diagram of the structure of the material equalization device (23) of the present invention;

[0091] Figure 13 This is the third usage state diagram of the present invention;

[0092] Figure 14 This is the fourth diagram showing the usage state of the present invention;

[0093] Figure 15 This is the fifth diagram showing the usage state of the present invention;

[0094] Figure 16 This is the sixth diagram showing the usage state of the present invention;

[0095] Figure 17 This is the seventh diagram showing the usage state of the present invention;

[0096] Figure 18 This is the eighth diagram showing the usage state of the present invention;

[0097] In the diagram, number 1 represents the frame.

[0098] 2—Fast and slow feeding device, 21—Feed hopper, 211—Upper hopper, 212—Lower hopper, 213—Rotary guide plate, 214—Rotary driver, 215—Intermediate partition plate, 22—Baffle device, 221—Feeding frame, 222—Baffle plate guide rail, 223—Left baffle plate, 224—Right baffle plate, 225—Left driver, 226—Right driver, 23—Equalizing device, 231—Discharge hopper, 232—Equalizing roller, 233—Equalizing roller driver;

[0099] 3—Quantitative weighing device; 31—Feeding hopper; 32—Feeding hopper fixing bracket; 33—Weighing sensor; 34—Feeding hopper limit support;

[0100] 4—Bag securing device; 41—Connecting lug; 42—Pressure actuator; 43—Pressure connecting rod; 44—Pressure seat.

[0101] 5—Control equipment;

[0102] 6—Packaging bags;

[0103] 7—Materials. Detailed Implementation

[0104] To make the technical means, inventive features, objectives, and effects of this invention readily understandable, the technical solution of this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0105] As per the instruction manual Figure 1 To the instruction manual Figure 12 The illustrated precise weighing and packaging system includes a control device 5 for real-time control of the system's operation, and further includes:

[0106] Rack 1;

[0107] Fast and slow feeding device 2 is installed above the frame 1;

[0108] The quantitative weighing device 3 is located directly below the fast and slow feeding device 2 and is located inside the frame 1.

[0109] Bag fixing device 4 is symmetrically arranged on both sides of quantitative weighing device 3;

[0110] Among them, the control device 5 is located on one side of the lower part of the frame 1; the fast and slow feeding device 2 includes a feeding hopper 21, a material blocking device 22, and a material equalization device 23 arranged sequentially from top to bottom.

[0111] In this invention, the frame 1 comprises two supports arranged opposite to each other and several cross braces connected between the two supports. The bottom of each support is connected to a fixing plate, and the fixing plate has fixing holes. The frame 1 has mounting holes of various specifications. The legs of the two supports are hollow inside to facilitate wiring. The control device 5 is connected to the lower part of the cross brace on one side between the two supports.

[0112] Furthermore, such as Figures 8 to 10 As shown, the feed hopper 21 includes:

[0113] The feeding hopper 211 has feeding hopper connecting plates that are adapted to and installed with the material blocking device 22 on its outer side.

[0114] The feeding hopper 212 is located directly below the feeding hopper 211;

[0115] Rotary guide plate 213 is rotatably connected to the inner upper side of the feeding hopper 211;

[0116] A rotary driver 214 is connected to an outer end above the hopper 211, and the output shaft of the rotary driver 214 is connected to the end of the rotary guide plate 213 at that end.

[0117] The middle partition 215 is connected to the inside of the feeding hopper 211 and is located below the rotating guide plate 213.

[0118] The rotary drive 214 is connected to the control device 5.

[0119] Specifically, a guide plate is also connected to the feeding hopper 211 between the rotating guide plate 213 and the middle partition plate 215. The guide plate is used to guide the material left and right, so as to achieve a smoother and more uniform material distribution.

[0120] Specifically, such as Figure 10 As shown, the two ends of the feeding hopper 212 are provided with bent connecting parts, and the height of the two end plates of the feeding hopper 212 is lower than that of the two side plates.

[0121] The intermediate partition 215 is located at 2 / 3 of the position of the two end plates of the feeding hopper 211, and the intermediate partition 215 is arranged parallel to the two side plates of the feeding hopper 211.

[0122] The rotating guide plate 213 is disposed above the intermediate partition plate 215;

[0123] The volume of the left cavity of the feeding hopper 211 is larger than the filling volume of the packaging bag 6; there is also a working gap between the feeding hopper 211 and the unloading hopper 212.

[0124] In this invention, the rotating guide plate 213 is disposed above the intermediate partition plate 215 and connected to the rotating driver 214. The rotating guide plate 213 can be driven by the rotating driver 214 to swing left and right, which is used to control the feed amount of the right cavity during slow feeding. The intermediate partition plate 215 divides the upper hopper 211 cavity into two parts, so that the left cavity of the upper hopper 211 occupies 2 / 3 of the total volume and the right cavity of the upper hopper 211 occupies 1 / 3 of the total volume. The lower hopper 212 and the upper hopper 211 are separately disposed, with a working gap between them left baffle plate 223 and right baffle plate 224.

[0125] Furthermore, such as Figure 11 As shown, the material blocking device 22 is connected between the upper hopper 211 and the lower hopper 212;

[0126] The material stop device 22 includes:

[0127] The feeding frame 221 is connected to the frame 1 above by support legs at the four lower corners of the feeding frame 221. The upper middle part of the feeding frame 221 is detachably connected to the upper hopper connecting plate corresponding to the upper hopper 211. The lower middle part of the feeding frame 221 is detachably connected to the bent connecting part of the lower hopper 212.

[0128] The baffle guide rail 222 is symmetrically connected to both sides of the inside of the feed frame 221;

[0129] Left baffle 223 is slidably connected to the left end between the two baffle guide rails 222;

[0130] Right baffle 224 is slidably connected to the right end between the two baffle guide rails 222;

[0131] The left drive 225 is connected to the middle of the left outer end of the feed frame 221. The drive rod of the left drive 225 passes through the feed frame 221 and is connected to the left baffle 223 through the left baffle connector.

[0132] The right driver 226 is connected to the middle of the right outer end of the feed frame 221. The drive rod of the right driver 226 passes through the feed frame 221 and is connected to the right baffle 224 through the right baffle connector.

[0133] Both the left driver 225 and the right driver 226 are connected to the control device 5.

[0134] In this invention, when the left baffle plate 223 and the right baffle plate 224 are closed, the feed hopper 211 can be completely sealed, and the volume of the left baffle plate 223 is larger than that of the right baffle plate 224.

[0135] Furthermore, such as Figure 13 As shown, the material leveling device 23 is located directly below the feed frame 221, and the material leveling device 23 includes:

[0136] The discharge hopper 231 has discharge hopper connecting plates symmetrically connected to the upper part of both ends of the discharge hopper 231, and multiple discharge hopper connecting holes are also provided at the lower part of the discharge hopper 231.

[0137] The material distribution roller 232 is equidistantly rotatably connected to the upper part of the discharge hopper 231;

[0138] The output shaft of each material distribution roller driver 233 is connected to the end of the corresponding material distribution roller 232.

[0139] The material distribution device 23 is connected to the feed frame 221 via a discharge hopper connecting plate and a locking component, and each material distribution roller driver 233 is connected to the control device 5.

[0140] In this invention, the discharge hopper 231 and the quantitative weighing device 3 are connected by a soft curtain to ensure that the weighing is not affected when the fast and slow feeding device 2 is working.

[0141] In this invention, the control device 5 is an existing product that can be purchased on the market. This existing product is now applied to this invention to realize the weighing of this invention. The control device 5 is a PLC, a PC, or a programmable logic controller.

[0142] Furthermore, such as Figure 7 As shown, the quantitative weighing device 3 is mounted on the middle cross brace of the frame 1, and the quantitative weighing device 3 includes:

[0143] The feeding hopper 31 is connected below the material distribution device 23;

[0144] The hopper fixing bracket 32 ​​is located in the upper part of the hopper 31;

[0145] Weighing sensors 33 are respectively installed at the lower corners of the four corners of the hopper fixing bracket 32;

[0146] The hopper limit support 34 is respectively installed on one side of the weighing sensor 33;

[0147] Each of the weighing sensors 33 is connected to the control device 5.

[0148] In this invention, a gap is left between the quantitative weighing device 3 and the fast and slow feeding device 2, and the quantitative weighing device 3 and the fast and slow feeding device 2 are connected by a soft curtain.

[0149] Specifically, such as Figure 7 and Figure 8 As shown, the upper part of the feeding hopper 31 is connected to the lower part of the material distribution device 23 via a soft curtain;

[0150] The middle of both sides of the hopper fixing bracket 32 ​​is provided with a bag fixing device mounting seat that is adapted to and connected to the bag fixing device 4; the ends of the hopper fixing bracket 32 ​​are also provided with a weighing sensor connection hole adapted to and connected to the weighing sensor 33 and a limit support connection hole adapted to and connected to the hopper limit support 34.

[0151] In this invention, the limiting support connection hole is a U-shaped through hole.

[0152] More specifically, such as Figure 7 As shown, one end of the weighing sensor 33 is detachably installed below the weighing sensor connection hole, and the other end is connected to the middle cross brace of the frame 1 through the weighing sensor connection plate.

[0153] The hopper limiting supports 34 are symmetrically arranged between the two weighing sensors 33 at each end. The hopper limiting supports 34 include: a limiting connecting plate, one end of which is connected to the middle cross brace of the frame 1; and a limiting adjusting component, which includes an adjusting bolt and at least two limiting nuts threaded onto the adjusting bolt. One end of the adjusting bolt is connected to the middle of the upper surface of the other end of the limiting connecting plate. The head of the adjusting bolt is located above the connecting hole of the limiting support, and the limiting nut is located below the connecting hole of the limiting support. The diameter of the limiting nut is larger than the diameter of the connecting hole of the limiting support. A gap is left between the limiting nut and the hopper fixing bracket 32.

[0154] In this invention, one end of the weighing sensor 33 is used to support the hopper fixing bracket 32, and the other end is connected to the frame 1. The hopper limiting support 34 is set on one side of the weighing sensor 33. The limiting nut of the hopper limiting support 34 is directly below the limiting support connecting hole of the hopper fixing bracket 32, and there is a certain gap between it and the hopper fixing bracket 32. The gap is adjustable. The limiting connecting plate is fixed on the frame 1. The limiting support 34 is fixed on the frame 1, but not fixed to the hopper fixing bracket 32. The limiting support connecting hole is a U-shaped through hole. The purpose is that when there is material, the weighing sensor 33 will be pressed down, and the entire quantitative weighing device 3 will move downward. If the equipment malfunctions and continuous feeding occurs, the entire quantitative weighing device 3 will continue to move downward. In order to ensure that the weighing sensor 33 is not damaged, the limiting nut will press against the hopper fixing bracket 32.

[0155] Furthermore, such as Figure 7 As shown, the bag securing device 4 is used to secure the packaging bag 6, and the bag securing device 4 includes:

[0156] Connecting ear 41 is connected to the bottom of the bag fixing device mounting base of the hopper fixing bracket 32;

[0157] The clamping driver 42 is connected below the connecting ear 41;

[0158] The clamping rod 43 has one end that is hinged to the output shaft of the clamping driver 42 via a connector, and the middle part of the clamping rod 43 is rotatably connected to the hopper 31 via a bag fixing seat.

[0159] The clamping seat 44 is hinged to the other end of the clamping connecting rod 43;

[0160] The clamping driver 42 is connected to the control device 5.

[0161] More specifically, such as Figure 7 As shown, the connecting ear 41 and the clamping driver 42 are connected by a hinged joint;

[0162] The clamping link 43 is a bent link with an obtuse angle, and the bent part of the clamping link 43 is rotatably connected to the fixed bag connecting seat through the connecting shaft;

[0163] The clamping seat 44 is generally in the shape of a long strip, and the clamping end of the clamping seat 44 is connected to a pressure plate;

[0164] The clamping seat 44 has multiple through holes extending along its length.

[0165] In this invention, the hinged seat comprises two U-shaped connecting plates arranged opposite to each other and a connecting block rotatably connected between the two U-shaped connecting plates. One end of the connecting block is connected to the connecting ear seat 41, and the two U-shaped connecting plates are connected to the non-output shaft end of the pressing driver 42. The fixed bag connecting seat is composed of two square plates arranged opposite to each other. The bent part of the pressing rod 43 is rotatably connected between the two square plates through the connecting shaft. The non-connecting end of the pressing plate of the pressing seat 44 is provided with anti-slip texture, and the pressing plate is made of rubber material.

[0166] In this invention, the rotary driver 214, the left driver 225, the right driver 226, and the clamping driver 42 are electric modules or cylinders, and are drive devices with electric or pneumatic telescopic driving functions.

[0167] In summary, a more specific embodiment of the present invention is as follows:

[0168] Before using the above-described precise weighing and packaging system, the present invention first obtains the weight of the quantitative weighing device 3 through the weighing sensor 33 and presets it to 0; when material 7 enters the packaging bag 6, the instantaneous weight obtained by the weighing sensor 33 is the weight of the material, which is the weighing process.

[0169] Before operation, the operator first presets the left baffle 223 to close when the bag weight reaches G using the control device 5. If the weighing sensor 33 detects that the total weight reaches G, the weighing sensor 33 will output a signal to the control device 5. Upon receiving this signal, the control device 5 will immediately issue a command to the left driver 225 to close the left baffle 223. At the same time, as long as material 7 enters the packaging bag 6, the weighing sensor 33 can automatically weigh it in real time. This is a continuous process.

[0170] The operator can preset three weight values ​​in advance through the control device 5: the first weight value is the weight Q of the packaged bag 6;

[0171] The second weight value is G, which is 80-90% of the full bag weight Q. At this time, it means that the packaging bag 6 is almost full, and the left baffle plate 223 needs to be closed to start slow feeding.

[0172] The third weight value is a stable feed rate in the slow feed zone. For example, if a feed rate of 1 kg / s is required, then the scanning cycle of the weighing sensor 33 is 1 second. Does this 1 second increase the weight by 1 kg? This feed rate is controlled by driving the rotating guide plate 213 to rotate left and right, thus stabilizing the feed process.

[0173] During operation, when the weight reaches the first weight value, the weighing sensor 33 outputs a signal to the control device 5. Upon receiving this signal, the control device 5 immediately issues a command to the right driver 226 to close the right baffle 224 and stop feeding. The control device 5 then controls the clamping driver 42 to drive the clamping seat 44 to release the packaging bag 6. At the same time, the feed hopper 21 of the fast and slow feeding device 2 buffers the material 7. After the packaging bag 6 is replaced, the control device 5 controls the clamping driver 42 to drive the clamping seat 44 to clamp the packaging bag 6. Then, the control device 5 controls the left driver 225 and the right driver 226 to quickly open the left baffle 223 and the right baffle 224. The material 7 buffered in the feed hopper 21 quickly enters the new packaging bag 6. The weighing process is continuous.

[0174] Specific application examples

[0175] Overall machine workflow:

[0176] 1. Preliminary settings for control device 5 before startup:

[0177] 1) Let W be the weight of the package filled with 6 bags;

[0178] 2) When the package weight reaches 90%W, the left baffle plate 223 is pushed out and closes with the middle partition plate 215 in the feed hopper 211, so that the left cavity forms a buffer hopper;

[0179] 3) When the package weight reaches 90%W, the feeding rate of the right cavity of the feeding hopper 211 is set to G / 5s, and the feeding rate every five seconds is GG = 1%W;

[0180] The above settings can be adjusted according to the specific circumstances to meet the system requirements; these are just examples.

[0181] 2. Continuous feeding after startup

[0182] 1) The staff installs the packaging bag 6 to the outside of the outlet of the hopper 31, starts the bag fixing device 4 through the control device 5, and the pressing driver 42 works to push the pressing rod 43 to move, and then the pressing rod 43 drives the pressing seat 44 to press down, thus completing the installation of the packaging bag 6;

[0183] 2) After the control device 5 detects that the bag fixing device 4 is in place, the control device 5 controls the left driver 225 and the right driver 226 to work. The left driver 225 drives the left baffle 223 to open, and the right driver 226 drives the right baffle to open. At the same time, the material equalization device 23 starts to work.

[0184] 3) Material 7 enters the fast and slow feeding device 1 quickly through the upstream equipment, and then falls evenly into the packaging bag 6. The quantitative weighing device 3 weighs it in real time.

[0185] 4) When the control device 5 detects that the weight of the material 7 in the packaging bag 6 reaches the set value of 90%W, the control device 5 controls the left driver 225 to work, which drives the left baffle 223 to push out. The left baffle 223 pushes out and forms a closure with the middle partition 215 in the feeding hopper 211, so that the left cavity forms a buffer hopper to buffer the material 7.

[0186] 5) Control device 5 controls the rotary driver 214 to work. The rotary guide plate 213 rotates left and right under the drive of the rotary driver 214 to ensure that the feed rate meets G at this time. The feed rate every five seconds is G.

[0187] 6) When the feed rate meets G, the feed is slow. When the control device 5 detects that the weight of the material 7 in the packaging bag 6 reaches the set value W, the control device 5 controls the right driver 226 to work, which drives the right baffle 224 to push out and form a closure with the middle partition 215 in the feeding hopper 211, thus preventing the material 7 from entering the packaging bag 6. The control device 5 controls the pressing driver 42 to work and pull the pressing rod 43, which drives the pressing seat 44 to retract, opening the packaging bag 6 and completing the metering and bagging of one bag of material 7.

[0188] 7) After that, the above workflow from 1) to 6) can be continuously run to carry out the continuous weighing and bagging process.

[0189] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A precise weighing and packaging system, comprising a control device (5) for real-time control of the operation of the weighing and packaging system, characterized in that, Also includes: Rack (1); Fast and slow feeding device (2) is installed above the frame (1); A quantitative weighing device (3) is set directly below the fast and slow feeding device (2) and is located inside the frame (1). The bag fixing device (4) is symmetrically arranged on both sides of the quantitative weighing device (3); Among them, the control device (5) is located on one side of the lower part of the frame (1); the fast and slow feeding device (2) includes a feeding hopper (21) and a material blocking device (22) arranged in sequence from top to bottom, as well as a material equalization device (23). The feed hopper (21) includes: The feeding hopper (211) has a feeding hopper connecting plate that is adapted to be installed on the outside of the feeding hopper (211); The feeding hopper (212) is located directly below the feeding hopper (211); Rotary guide plate (213) is rotatably connected to the inner upper side of the feeding hopper (211); A rotary driver (214) is connected to an outer end above the hopper (211), and the output shaft of the rotary driver (214) is connected to the end of the rotary guide plate (213) at the outer end. The middle partition (215) is connected to the inside of the feeding hopper (211) and is located below the rotating guide plate (213); The rotary actuator (214) is connected to the control device (5); The quantitative weighing device (3) is installed on the middle cross brace of the frame (1), and the quantitative weighing device (3) includes: The loading hopper (31) is connected below the discharge hopper (231); A hopper fixing bracket (32) is provided in the upper part of the hopper (31); Weighing sensors (33) are respectively installed at the four corners of the fixed bracket (32) of the hopper; The hopper limiting support (34) is respectively set on one side of the weighing sensor (33); Each weighing sensor (33) is connected to the control device (5); One end of the load cell (33) is detachably installed below the load cell connection hole, and the other end is connected to the middle cross brace of the frame (1) through the load cell connection plate. The hopper limiting support (34) is symmetrically arranged between two weighing sensors (33) at each end. The hopper limiting support (34) includes: a limiting connecting plate, one end of which is connected to the middle cross brace of the frame (1); a limiting adjusting component, which includes an adjusting bolt and at least two limiting nuts threaded onto the adjusting bolt. One end of the adjusting bolt is connected to the middle of the upper surface of the other end of the limiting connecting plate. The head of the adjusting bolt is located above the connecting hole of the limiting support, and the limiting nut is located below the connecting hole of the limiting support. The diameter of the limiting nut is larger than the diameter of the connecting hole of the limiting support. A gap is left between the limiting nut and the hopper fixing bracket (32).

2. The precise weighing and packaging system according to claim 1, characterized in that, The two ends of the feeding hopper (212) are provided with bent connecting parts, and the two end plates of the feeding hopper (212) are lower than the height of the two side plates; The intermediate partition (215) is located at 2 / 3 of the position of the two end plates of the feeding hopper (211), and the intermediate partition (215) is arranged parallel to the two side plates of the feeding hopper (211). The rotating guide plate (213) is positioned above the intermediate partition plate (215); Among them, the volume of the left cavity of the feeding hopper (211) is larger than the filling volume of the packaging bag (6); there is also a working gap between the feeding hopper (211) and the unloading hopper (212).

3. The precise weighing and packaging system according to claim 1, characterized in that, The material blocking device (22) is connected between the upper hopper (211) and the lower hopper (212); The material stop device (22) includes: The feed frame (221) is connected to the frame (1) above by the four corners of the feed frame (221) via support legs. The upper middle part of the feed frame (221) is detachably connected to the upper hopper connecting plate corresponding to the upper hopper (211). The lower middle part of the feed frame (221) is detachably connected to the bent connecting part of the lower hopper (212). The baffle guide rail (222) is symmetrically connected to both sides inside the feed frame (221); The left baffle plate (223) is slidably connected to the left end between the two baffle plate guide rails (222); The right baffle (224) is slidably connected to the right end between the two baffle guide rails (222); The left drive (225) is connected to the middle of the left outer end of the feed frame (221). The drive rod of the left drive (225) passes through the feed frame (221) and is connected to the left baffle (223) through the left baffle connector. The right drive (226) is connected to the middle of the right outer end of the feed frame (221). The drive rod of the right drive (226) passes through the feed frame (221) and is connected to the right baffle (224) through the right baffle connector. The left driver (225) and the right driver (226) are both connected to the control device (5).

4. The precise weighing and packaging system according to claim 1, characterized in that, The material leveling device (23) is located directly below the feed frame (221), and the material leveling device (23) includes: The discharge hopper (231) has discharge hopper connecting plates symmetrically connected to the upper part of both ends of the discharge hopper (231), and multiple soft curtain connecting holes are also provided at the lower part of the discharge hopper (231). The material distribution roller (232) is equidistantly rotatably connected to the upper part of the discharge hopper (231); The output shaft of each material distribution roller driver (233) is connected to the end of the corresponding material distribution roller (232); Among them, the material equalization device (23) is connected to the feed frame (221) through the discharge hopper connecting plate and the locking part, and each material equalization roller driver (233) is connected to the control device (5).

5. The precise weighing and packaging system according to claim 1, characterized in that, The upper part of the loading hopper (31) is connected to the lower part of the discharge hopper (231) through a soft curtain connecting hole; The middle of both sides of the hopper fixing bracket (32) is provided with a bag fixing device mounting seat that is adapted to and connected to the bag fixing device (4); the two ends of the hopper fixing bracket (32) are also provided with a weighing sensor connection hole adapted to and connected to the weighing sensor (33) and a limit support connection hole adapted to and connected to the hopper limit support (34).

6. The precise weighing and packaging system according to claim 1, characterized in that, The bag securing device (4) is used to secure the packaging bag (6), and the bag securing device (4) includes: Connecting ear (41) is connected to the bottom of the bag fixing device mounting seat of the hopper fixing bracket (32); A clamping driver (42) is connected below the connecting lug (41); The clamping rod (43) has one end hinged to the output shaft of the clamping driver (42) via a connector, and the middle part of the clamping rod (43) is rotatably connected to the hopper (31) via a bag fixing seat. The clamping seat (44) is hinged to the other end of the clamping connecting rod (43); The clamping driver (42) is connected to the control device (5).

7. The precise weighing and packaging system according to claim 6, characterized in that, The connecting lug (41) and the clamping driver (42) are connected by a hinge; The pressing link (43) is a bent link with an obtuse angle as a whole, and the bent part of the pressing link (43) is rotatably connected to the fixed bag connecting seat through the connecting shaft; The clamping seat (44) is generally in the shape of a long strip, and the clamping end of the clamping seat (44) is connected to a pressure plate; The clamping seat (44) has multiple through holes along its length.

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