Weighing and bagging system with precise metering function

Abstract

The weighing and bagging system comprises a control device, and further comprises a rack, a weighing device and a weighing device, the fast and slow feeding device is mounted above the rack; the quantitative weighing device is arranged under the fast and slow feeding device, and the quantitative weighing device is located in the machine frame. The bag fixing devices are symmetrically arranged on the two sides of the quantitative weighing device; the fast and slow feeding device comprises a feeding hopper, a material blocking device and a material uniformizing device. The automatic feeding device is safe, reliable and high in stability, the problems that a material conveyor is frequently started and stopped, the production process is discontinuous, the production link is lengthy, the occupied labor is large, and the working efficiency is extremely low can be solved, and the problem that the feeding precision is uncontrollable due to the fact that material conveying equipment is high in conveying speed can also be solved; and meanwhile, the problem of bagging scattering caused by blanking deviation and eccentric accumulation of materials can be solved, and the weighing and packaging requirements of tobacco stems in a tobacco processing threshing and redrying production line are met.

Description

Technical Field

[0001] The invention relates to a weighing and packaging system, in particular to a precise weighing and packaging system, belonging to the technical field of tobacco packaging. Background Art

[0002] Generally speaking, in the tobacco stem processing section of the tobacco processing leaf threshing and redrying production line, the weighing and packaging of tobacco stems generally adopts the weighing and packaging method of the metering hopper. Although this type of weighing and packaging process also adopts automatic weighing and material bagging, the material weighing process is still manually operated, especially the metering hopper. After each metering is completed, the conveyor needs to stop and continue to transport materials to the metering hopper. After the metering hopper puts the material in it into the packaging bag, the conveyor starts working again to transport the material to the metering hopper. This frequent start and stop makes the whole process discontinuous, the production links are lengthy, the manpower is high, the space station is large, and the work efficiency is extremely low. In addition, due to the fast conveying speed of the conveying equipment, the material cannot be accurately controlled, so the metering accuracy is low.

[0003] There is currently no better solution to a series of problems in the weighing and packaging of tobacco stems due to frequent start and stop of equipment, discontinuous process, lengthy production links, high labor intensity, extremely low work efficiency, and low measurement accuracy.

[0004] At present, a Chinese utility model patent with the announcement number CN 217598880 U discloses an automatic packaging system, comprising a material distribution box (1), wherein a main bracket (17) is fixedly installed on the bottom surface of the material distribution box (1), a feed hopper (2) is fixedly installed on the top surface of the material distribution box (1), a first solenoid valve (4) is provided at the bottom of the feed hopper (2), a first supporting leg (5) is fixedly installed on the inner bottom surface of the material distribution box (1), an electric push rod (6) is hingedly connected to the inner bottom surface of the material distribution box (1), a weighing platform (7) is hingedly connected to the output end of the electric push rod (6), and the top surface of the first supporting leg (5) is hingedly connected to the weighing platform (7), a weighing box (8) is fixedly installed on the top surface of the weighing platform (7), a pressure sensor is provided at the bottom of the weighing box (8), and the weighing box (8) is provided with a pressure sensor. ) is provided with a second solenoid valve (9) on the front, a guide groove (10) is fixedly installed on the front of the weighing box (8), a base (11) is provided in front of the main bracket (17), a second supporting leg (12) is fixedly installed on the top surface of the base (11), a motor (13) is fixedly installed on the front of the second supporting leg (12), a transmission 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 transmission shaft (14), a weighing bucket (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 supporting leg (12), and a bagging mechanism is provided on the left side of the second supporting leg (12). Although the patent can realize the weighing of materials, the above patent has a complex structure, there are still errors in weighing, and the operation is cumbersome. In short, it is often very inconvenient.

[0005] Therefore, the key to solving the above technical problems is to develop a weighing and packaging system that is simple to operate, efficient, and accurate in measurement. Summary of the invention

[0006] In view of the many defects and shortcomings existing in the above-mentioned background technology, the present invention has made improvements and innovations thereto, with the aim of providing a safe, reliable, stable and accurate measuring weighing and packaging system, which can effectively solve the problems of frequent starting and stopping of material conveyors, discontinuous production processes, lengthy production links, high manpower occupation and extremely low work efficiency, so as to meet the weighing and packaging requirements of tobacco stems in the tobacco processing leaf threshing and re-roasting production line.

[0007] Another invention object of the present invention is to solve the problem of uncontrollable feeding accuracy and low precision caused by the fast conveying speed of material conveying equipment; at the same time, it can also effectively solve the problem of bagging spillage caused by material offset and eccentric accumulation of materials, so as to improve the flexibility and convenience of system operation.

[0008] In order to solve the above problems and achieve the above invention objectives, the present invention is a precise weighing and packaging system which is realized by adopting the following design structure and the following technical solutions:

[0009] The present invention is aimed at weighing and packaging tobacco stems in leaf threshing and redrying factories, and can effectively solve the problems of frequent starting and stopping of material conveyors, discontinuous production processes, lengthy production links, high labor occupation, and extremely low work efficiency; it can solve the problem of uncontrollable feeding accuracy and low precision caused by the fast conveying speed of material conveying equipment; it can effectively solve the problem of material deviation and eccentric accumulation of materials leading to bagging and spillage.

[0010] As an improvement of a precise 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 also includes:

[0011] Rack (1);

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

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

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

[0015] The control device (5) is arranged on one side of the lower part of the frame (1); the fast and slow feeding device (2) comprises a feeding hopper (21), a material blocking device (22) and a material equalizing device (23) which are arranged in sequence from top to bottom.

[0016] As an improvement of the above-mentioned present invention, the feed hopper (21) comprises:

[0017] An upper hopper (211), the outer sides of which are respectively connected with upper hopper connecting plates adapted to be mounted on the material blocking device (22);

[0018] A lower hopper (212), the lower hopper (212) is arranged directly below the upper hopper (211);

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

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

[0021] A middle partition (215), the middle partition (215) is connected to the inside of the upper hopper (211), and the middle partition (215) is located below the rotating material guide plate (213);

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

[0023] As a further improvement of the above invention, the two ends of the lower hopper (212) are provided with bent connection parts outwardly, and the two end plates of the lower hopper (212) are lower than the height of the two side plates;

[0024] The middle partition plate (215) is arranged at the 2 / 3 position of the two end plates of the upper hopper (211), and the middle partition plate (215) is arranged parallel to the two side plates of the upper hopper (211);

[0025] The rotating material guide plate (213) is arranged above the middle partition plate (215);

[0026] The volume of the left cavity of the upper hopper (211) is larger than the filling volume of the packaging bag (6); and a working gap is left between the upper hopper (211) and the lower hopper (212).

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

[0028] The material blocking device (22) comprises:

[0029] A feeding frame (221), wherein the four lower corners of the feeding frame (221) are connected to the upper part of the frame (1) through supporting legs, the upper middle part of the feeding frame (221) is detachably connected to the upper hopper connecting plate corresponding to the upper hopper (211), and the lower middle part of the feeding frame (221) is detachably connected to the bent connecting part of the lower hopper (212);

[0030] The baffle plate guide rails (222) are symmetrically connected to both sides of the inside of the feed frame (221);

[0031] A left material blocking plate (223), the left material blocking plate (223) is slidably connected to the left end between the two material blocking plate guide rails (222);

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

[0033] A left driver (225), the left driver (225) is connected to the middle of the left outer end of the feed frame (221), a driving rod of the left driver (225) passes through the feed frame (221), and is connected to the left baffle plate (223) through a left baffle plate connecting piece;

[0034] A right driver (226), the right driver (226) is connected to the middle part of the right outer end of the feed frame (221), and a driving rod of the right driver (226) passes through the feed frame (221) and is connected to the right baffle plate (224) through a right baffle plate connecting piece;

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

[0036] As a further improvement of the above-mentioned present invention, the material balancing device (23) is arranged directly below the feeding frame (221), and the material balancing device (23) comprises:

[0037] A discharge hopper (231), wherein the upper parts of both ends of the discharge hopper (231) are symmetrically connected with discharge hopper connecting plates, and the lower part of the discharge hopper (231) is also provided with a plurality of discharge hopper connecting holes;

[0038] A material distribution roller (232), the material distribution roller (232) is rotatably connected to the upper part of the discharge hopper (231) at equal intervals;

[0039] A material balancing roller driver (233), wherein the output shaft of each material balancing roller driver (233) is respectively connected to the end of the corresponding material balancing roller (232);

[0040] The material distribution device (23) is connected to the feed frame (221) via a discharge hopper connection plate and a locking member, and each material distribution roller driver (233) is connected to the control device (5).

[0041] As a further improvement of the above-mentioned present invention, the quantitative weighing device (3) is installed on the middle cross brace of the frame (1), and the quantitative weighing device (3) comprises:

[0042] A charging hopper (31), the charging hopper (31) is connected below the discharging hopper (231);

[0043] A charging hopper fixing bracket (32), the charging hopper fixing bracket (32) being arranged at the upper middle part of the charging hopper (31);

[0044] Weighing sensors (33), the weighing sensors (33) are respectively arranged below the four corners of the charging hopper fixing bracket (32);

[0045] A charging hopper limit support (34), the charging hopper limit support (34) is respectively arranged on one side of the weighing sensor (33);

[0046] Wherein, 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 a plurality of soft curtain connection holes below the discharging hopper (231) via a soft curtain;

[0048] The middle parts of both sides of the charging hopper fixing bracket (32) are provided with bag fixing device mounting seats adapted to be connected to the bag fixing device (4); the ends of both ends of the charging hopper fixing bracket (32) are also provided with weighing sensor connecting holes adapted to be connected to the weighing sensor (33) and limit support connecting holes adapted to be connected to the charging hopper limit support (34).

[0049] As a further improvement of the above-mentioned present invention, one end of the weighing sensor (33) is detachably mounted 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 loading hopper limit support (34) is symmetrically arranged between the two weighing sensors (33) at each end, and the loading hopper limit support (34) includes: a limit connecting plate, one end of which is connected to the middle cross brace of the frame (1); a limit adjusting member, the limit adjusting member includes an adjusting bolt and at least two limit nuts threadedly connected to the adjusting bolt, one end of the adjusting bolt is connected to the middle part of the upper surface of the other end of the limit connecting plate, the head of the adjusting bolt is located above the limit support connection hole, the limit nut is located below the limit support connection hole, and the diameter of the limit nut is greater than the diameter of the limit support connection hole; wherein a gap is left between the limit nut and the loading hopper fixing bracket (32).

[0051] As a further improvement of the above-mentioned present invention, the bag fixing device (4) is used to fix the packaging bag (6), and the bag fixing device (4) comprises:

[0052] A connecting ear seat (41) is connected to the lower part of the bag fixing device mounting seat of the charging hopper fixing bracket (32);

[0053] A pressing driver (42), the pressing driver (42) is connected below the connecting ear seat (41);

[0054] A pressing connecting rod (43), one end of which is hingedly connected to the output shaft of the pressing driver (42) through a connector, and a middle portion of the pressing connecting rod (43) is rotatably connected to the charging hopper (31) through a bag fixing seat;

[0055] A pressing seat (44), the pressing seat (44) is hingedly connected to the other end of the pressing connecting rod (43);

[0056] The pressing drive (42) is connected to the control device (5).

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

[0058] The clamping connecting rod (43) is a bent connecting rod with an obtuse angle as a whole, and the bent portion of the clamping connecting rod (43) is rotatably connected to the bag fixing connection seat via a connecting shaft;

[0059] The pressing seat (44) is in the form of an elongated strip structure as a whole, and a pressing plate is connected to the pressing end of the pressing seat (44);

[0060] The pressing seat (44) is provided with a plurality of through holes along its length direction.

[0061] The working principle is: before using the above-mentioned 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 the material (7) enters the packaging bag (6), the instantaneous weight obtained by the weighing sensor (33) is the weight of the material (7), and this is the weighing process.

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

[0063] The operator presets three weight values ​​in advance through the control device (5): the first weight value is the weight Q of the fully filled packaging bag (6);

[0064] The second weight value is G, which is (80-90%) of the full bag weight Q. This indicates that the packaging bag (6) is almost full, and the left baffle plate (223) needs to be closed to perform slow feeding.

[0065] The third weight value is a stable feed amount in the slow feed zone (for example, if a feed amount of 1 kg / s is required, then the scanning cycle of the weighing sensor (33) is 1 second, and this 1 second is whether the weight increases by 1 kg). This feed amount is controlled by driving the rotating guide plate (213) to rotate left and right, which plays a role in a stable feeding 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). After receiving the signal, the control device (5) will immediately send an instruction to the right driver (226) to close the right baffle plate (224) and stop feeding. The control device (5) 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) caches 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 plate (223) and the right baffle plate (224). The material (7) cached in the feed hopper (21) quickly enters the new packaging bag (6). At this time, weighing is a continuous process.

[0067] Compared with the prior art, the present invention has the following beneficial effects:

[0068] 1. Compared with the conventional metering hopper feeding method, the present invention avoids frequent start and stop, the whole process is continuous, the production link is simple, the labor occupation is small, the space occupation is small, the work efficiency is high, the feed amount is accurately controlled, and the metering accuracy is high;

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

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

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

[0072] 5. The present invention adopts a fast and slow feeding device and a quantitative weighing device to cooperate with each other to accurately control the loaded materials, which can provide very accurate measurement results with small errors, save labor, reduce the labor intensity of operators, and avoid errors in manual weighing;

[0073] 6. The quantitative weighing device of the present invention uses a weighing sensor to weigh, which can detect the weight of the material in real time, automatically feed back the data to the control, reduce 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 work of the packaging bag, avoiding the delay that may occur during manual operation, and can also automatically and continuously operate at high speed, thereby significantly improving the production efficiency of the entire loading process;

[0075] 8. The fast and slow feeding device of the present invention adopts the design of fast feeding area and slow feeding area, and can adjust the feeding amount according to the feeding state by setting the rotary driver and the blocking device of the control device to optimize the loading process;

[0076] 9. The material loading device of the present invention is reasonably rotated by controlling the device, which helps to reduce the impact of the rapid fall of the material on the weighing sensor, maintain the stability of the material supply in the system, and reduce the production stagnation or efficiency reduction caused by the fluctuation of material feed;

[0077] 10. The loading hopper limit support of the present invention can effectively protect the stability of the quantitative weighing device and prevent the loading hopper from falling or tilting 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0079] Figure 1 It is one of the use state diagrams of the present invention;

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

[0081] Figure 3 It 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 It is a partial structural schematic diagram of the present invention;

[0084] Figure 6 It is one of the schematic diagrams of the local structural connection relationship of the present invention;

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

[0086] Figure 8 It is a schematic structural diagram of the components of the fast and slow feeding device (2) of the present invention;

[0087] Fig. 9 It is a right side view of the slow feeding device (2) of the present invention;

[0088] Fig.10 It is a schematic structural diagram of the feed hopper (21) component of the present invention;

[0089] Fig.11 It is a schematic structural diagram of the material blocking device (22) of the present invention;

[0090] Fig.12 It is a schematic structural diagram of the components of the material equalizing device (23) of the present invention;

[0091] Fig.13 This is the third use state diagram of the present invention;

[0092] Fig.14 This is the fourth usage state diagram of the present invention;

[0093] Fig.15 This is the fifth use state diagram of the present invention;

[0094] Fig.16 This is the sixth use state diagram of the present invention;

[0095] Fig.17 This is the seventh use state diagram of the present invention;

[0096] Fig.18 This is the eighth use state diagram of the present invention;

[0097] Among them, the numbers in the figure are: 1—frame;

[0098] 2—fast and slow feeding device, 21—feed hopper, 211—upper hopper, 212—lower hopper, 213—rotating guide plate, 214—rotating driver, 215—middle partition, 22—blocking device, 221—feeding frame, 222—blocking plate guide rail, 223—left blocking plate, 224—right blocking plate, 225—left driver, 226—right driver, 23—equalizing device, 231—discharging hopper, 232—equalizing roller, 233—equalizing roller driver;

[0099] 3—quantitative weighing device, 31—loading hopper, 32—loading hopper fixing bracket, 33—weighing sensor, 34—loading hopper limit support;

[0100] 4—bag fixing device, 41—connecting ear seat, 42—pressing driver, 43—pressing connecting rod, 44—pressing seat,

[0101] 5—Control equipment;

[0102] 6—Packing bag;

[0103] 7—Materials. DETAILED DESCRIPTION

[0104] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0105] As the instruction manual Figure 1 To the instruction manual Fig.12 The illustrated accurate weighing and packaging system includes a control device 5 for real-time control of the operation of the weighing and packaging system, and also includes:

[0106] Rack 1;

[0107] A fast and slow feeding device 2, wherein the fast and slow feeding device 2 is installed above the frame 1;

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

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

[0110] The control device 5 is arranged at 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 equalizing device 23 which are arranged in sequence from top to bottom.

[0111] In the present invention, the rack 1 includes two brackets arranged opposite to each other and several cross braces connected between the two brackets. The bottoms of the two brackets are connected to a fixing plate, and the fixing plates are provided with fixing holes. The rack 1 is provided with mounting holes of various specifications, wherein the legs of the two brackets are hollow inside for easy wiring; the control device 5 is connected to the lower part of the cross brace on one side between the two brackets.

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

[0113] An upper hopper 211, the outer sides of which are respectively connected with upper hopper connecting plates adapted to be installed with the material blocking device 22;

[0114] A lower hopper 212, the lower hopper 212 is arranged directly below the upper hopper 211;

[0115] A rotating material guide plate 213, the rotating material guide plate 213 is rotatably connected to an inner upper side of the upper hopper 211;

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

[0117] The middle partition plate 215 is connected to the interior of the upper 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 material guide plate is connected to the upper hopper 211 between the rotating material guide plate 213 and the middle partition plate 215. The material guide plate is used to guide the material left and right to achieve the purpose of relatively smooth and uniform material distribution.

[0120] Specifically, Fig.10 As shown, the two ends of the lower hopper 212 are provided with bent connection parts outwardly, and the two end plates of the lower hopper 212 are lower than the height of the two side plates;

[0121] The middle partition plate 215 is arranged at the 2 / 3 position of the two end plates of the upper hopper 211, and the middle partition plate 215 is arranged parallel to the two side plates of the upper hopper 211;

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

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

[0124] In the present invention, the rotating guide plate 213 is arranged above the middle partition 215 and is connected to the rotating driver 214. The rotating guide plate 213 can be driven by the rotating driver 214 to swing left and right, and is used to control the feed amount of the right cavity during slow feeding; the middle partition 215 divides the upper hopper 211 cavity into two, 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 arranged, and a working gap between the left baffle plate 223 and the right baffle plate 224 is left.

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

[0126] The material blocking device 22 comprises:

[0127] The feed frame 221, the four lower corners of the feed frame 221 are connected to the upper part of the frame 1 through the 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, and the lower middle part of the feed frame 221 is detachably connected to the bent connecting part of the lower hopper 212;

[0128] The baffle plate guide rails 222 are symmetrically connected to both sides of the feed frame 221;

[0129] A left material baffle plate 223, which is slidably connected to the left end between the two material baffle plate guide rails 222;

[0130] A right baffle plate 224, which is slidably connected to the right end between the two baffle plate guide rails 222;

[0131] A left driver 225, the left driver 225 is connected to the middle of the left outer end of the feed frame 221, and a driving rod of the left driver 225 passes through the feed frame 221 and is connected to the left baffle plate 223 through a left baffle plate connecting piece;

[0132] The right driver 226 is connected to the middle part of the right outer end of the feed frame 221. The driving rod of the right driver 226 passes through the feed frame 221 and is connected to the right baffle plate 224 through the right baffle plate connecting piece;

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

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

[0135] Further, such as Fig.13 As shown, the material balancing device 23 is arranged directly below the feeding frame 221, and the material balancing device 23 includes:

[0136] A discharge hopper 231, the upper parts of both ends of the discharge hopper 231 are symmetrically connected with discharge hopper connecting plates, and the lower part of the discharge hopper 231 is also provided with a plurality of discharge hopper connecting holes;

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

[0138] The material balancing roller driver 233, the output shaft of each material balancing roller driver 233 is respectively connected to the end of the corresponding material balancing roller 232;

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

[0140] In the present invention, a soft curtain is used to connect the discharge hopper 231 and the quantitative weighing device 3 to ensure that the fast and slow feeding device 2 does not affect the weighing when it is working.

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

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

[0143] A charging hopper 31, the charging hopper 31 is connected below the material equalizing device 23;

[0144] A charging hopper fixing bracket 32, which is arranged at the upper middle part of the charging hopper 31;

[0145] Weighing sensors 33, which are respectively arranged below the four corners of the charging hopper fixing bracket 32;

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

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

[0148] In the present 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, Figure 7 and Figure 8 As shown, the upper part of the charging hopper 31 is connected to the lower part of the material equalizing device 23 through a soft curtain;

[0150] A bag fixing device mounting seat adapted to be connected to the bag fixing device 4 is provided in the middle of both sides of the loading hopper fixing bracket 32; a weighing sensor connecting hole adapted to be connected to the weighing sensor 33 and a limit support connecting hole adapted to be connected to the loading hopper limit support 34 are also provided at the end portions of the two ends of the loading hopper fixing bracket 32.

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

[0152] More specifically, Figure 7 As shown, one end of the weighing sensor 33 is detachably mounted 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 loading hopper limit support 34 is symmetrically arranged between the two weighing sensors 33 at each end, and the loading hopper limit support 34 includes: a limit connecting plate, one end of which is connected to the middle cross brace of the frame 1; a limit adjusting member, the limit adjusting member includes an adjusting bolt and at least two limit nuts threadedly connected to the adjusting bolt, one end of the adjusting bolt is connected to the middle part of the upper surface of the other end of the limit connecting plate, the head of the adjusting bolt is located above the limit support connecting hole, the limit nut is located below the limit support connecting hole, and the diameter of the limit nut is larger than the diameter of the limit support connecting hole; wherein, a gap is left between the limit nut and the loading hopper fixed bracket 32.

[0154] In the present invention, one end of the weighing sensor 33 is used to support the charging hopper fixed bracket 32, and the other end is connected to the frame 1; the charging hopper limit support 34 is arranged on one side of the weighing sensor 33, and the limit nut of the charging hopper limit support 34 is directly below the limit support connecting hole of the charging hopper fixed bracket 32, and has a certain gap with the charging hopper fixed bracket 32, and the gap is adjustable, and the limit connecting plate is fixed on the frame 1; the limit support 34 is fixed on the frame 1, and is not fixed to the charging hopper fixed bracket 32; the limit support connecting hole is a U-shaped through hole, so 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 fails and material is added continuously, the entire quantitative weighing device 3 will keep moving downward. In order to ensure that the weighing sensor 33 is not damaged, the limit nut will support the charging hopper fixed bracket 32 ​​at this time.

[0155] Further, such as Figure 7 As shown, the bag fixing device 4 is used to fix the packaging bag 6, and the bag fixing device 4 includes:

[0156] A connecting ear seat 41, which is connected below the bag fixing device mounting seat of the hopper fixing bracket 32;

[0157] A pressing driver 42, the pressing driver 42 is connected below the connecting ear seat 41;

[0158] A clamping connecting rod 43, one end of which is hingedly connected to the output shaft of the clamping driver 42 through a connector, and a middle portion of the clamping connecting rod 43 is rotatably connected to the charging hopper 31 through a bag-fixing connecting seat;

[0159] A pressing seat 44, the pressing seat 44 is hingedly connected to the other end of the pressing connecting rod 43;

[0160] The pressure drive 42 is connected to the control device 5 .

[0161] More specifically, Figure 7 As shown, the connecting ear seat 41 and the pressing driver 42 are connected via a hinge seat;

[0162] The clamping connecting rod 43 is a bent connecting rod with an obtuse angle as a whole, and the bent portion of the clamping connecting rod 43 is rotatably connected to the bag fixing connection seat through a connecting shaft;

[0163] The pressing seat 44 is in an elongated strip-shaped structure as a whole, and a pressing plate is connected to the pressing end of the pressing seat 44;

[0164] The pressing seat 44 is provided with a plurality of through holes along its length direction.

[0165] In the present invention, the articulated seat includes 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 clamping driver 42; the solid bag connecting seat is composed of two square plates arranged opposite to each other, and the bent portion of the clamping connecting rod 43 is rotatably connected between the two square plates through a connecting shaft; the non-connecting end of the pressing plate of the clamping seat 44 is provided with anti-slip grooves, and the pressing plate is made of rubber material.

[0166] In the present invention, the rotation driver 214, the left driver 225, the right driver 226 and the pressing driver 42 are electric modules or cylinders, and are driving devices with electric or pneumatic telescopic driving functions.

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

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

[0169] Before operation, the operator first presets the bagging weight to G through the control device 5 to close the left material baffle 223; 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 issue a command to the left driver 225 to close the left material baffle 223 after receiving the signal; at the same time, as long as there is material 7 entering the packaging bag 6, the weighing sensor 33 can automatically weigh in real time, which is a continuous process;

[0170] The operator presets three weight values ​​in advance through the control device 5: the first weight value is the weight Q of the full packaging 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 perform slow feeding;

[0172] The third weight value is a stable feed amount in the slow feed zone. For example, if a feed amount of 1kg / s is required, the scanning cycle of the weighing sensor 33 is 1s. This 1s means that 1kg of weight is added. This feed amount is controlled by driving the rotating guide plate 213 to rotate left and right, which plays a role in a stable feeding process.

[0173] During operation, when the weight reaches the first weight value, the weighing sensor 33 will output a signal to the control device 5. After receiving the signal, the control device 5 will immediately send an instruction to the right driver 226 to close the right baffle plate 224 and stop feeding. The control device 5 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 is caching the material 7. After the replacement of the packaging bag 6 is completed, 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 plate 223 and the right baffle plate 224. The material 7 cached in the feed hopper 21 quickly enters the new packaging bag 6. At this time, weighing is a continuous process.

[0174] Specific application examples

[0175] Machine workflow:

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

[0177] 1) Set the weight of the filled packaging bag 6 to W;

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

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

[0180] The above setting values ​​can be adjusted according to the specific situation and system requirements. They are only examples here.

[0181] 2. Continuous feeding after startup

[0182] 1) The staff installs the packaging bag 6 to the outside of the outlet of the loading hopper 31, starts the bag fixing device 4 through the control device 5, and the pressing driver 42 works to push the pressing connecting rod 43 to move, and then the pressing connecting rod 43 drives the pressing seat 44 to press down, 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 material baffle plate 223 to open, the right driver 226 drives the right material baffle plate to open, and the material equalizing device 23 starts to work at the same time;

[0184] 3) The material 7 quickly enters the fast and slow feeding device 1 through the upstream equipment, and then falls evenly into the packaging bag 6, and 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 90% W of the set value, the control device 5 controls the left driver 225 to work, driving the left material baffle plate 223 to be pushed out, and the left material baffle plate 223 is pushed out to form a closed state with the middle partition plate 215 in the upper hopper 211, so that the left cavity forms a buffer hopper for caching the material 7;

[0186] 5) The control device 5 controls the rotation driver 214 to work, and the rotation guide plate 213 rotates left and right under the drive of the rotation driver 214 to ensure that the feed amount meets G at this time, and the feed amount every five seconds is G;

[0187] 6) When the feeding amount meets G, it is slow feeding. 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, driving the right baffle plate 224 to be pushed out and closed with the middle partition plate 215 in the upper hopper 211, thereby blocking the material 7 from entering the packaging bag 6; the control device 5 controls the clamping driver 42 to work and pull the clamping connecting rod 43, driving the clamping seat 44 to retreat, opening the packaging bag 6 to complete the metering and bagging of a bag of material 7;

[0188] 7) Thereafter, the above working processes 1) to 6) are continuously executed to carry out a continuous weighing and bagging process.

[0189] Finally, it should be noted that the above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution 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); A fast and slow feeding device (2), the fast and slow feeding device (2) is installed above the frame (1); A quantitative weighing device (3), the quantitative weighing device (3) is arranged directly below the fast and slow feeding device (2), and the quantitative weighing device (3) is located inside the frame (1); A bag fixing device (4), the bag fixing device (4) is symmetrically arranged on both sides of the quantitative weighing device (3); The control device (5) is arranged on one side of the lower part of the frame (1); the fast and slow feeding device (2) comprises a feeding hopper (21), a material blocking device (22) and a material equalizing device (23) which are arranged in sequence from top to bottom.

2. The precise weighing and packaging system according to claim 1, characterized in that: The feed hopper (21) comprises: An upper hopper (211), the outer sides of which are respectively connected with upper hopper connecting plates adapted to be mounted on the material blocking device (22); A lower hopper (212), the lower hopper (212) is arranged directly below the upper hopper (211); A rotating material guide plate (213), the rotating material guide plate (213) is rotatably connected to an inner upper side of the upper hopper (211); A rotary driver (214), the rotary driver (214) is connected to an outer end above the upper hopper (211), and an output shaft of the rotary driver (214) is connected to an end of a rotary guide plate (213) at the end; A middle partition (215), the middle partition (215) is connected to the inside of the upper hopper (211), and the middle partition (215) is located below the rotating material guide plate (213); The rotary drive (214) is connected to the control device (5).

3. The precise weighing and packaging system according to claim 2, characterized in that: The two ends of the lower hopper (212) are provided with bent connection parts outwardly, and the two end plates of the lower hopper (212) are lower than the height of the two side plates; The middle partition plate (215) is arranged at the 2 / 3 position of the two end plates of the upper hopper (211), and the middle partition plate (215) is arranged parallel to the two side plates of the upper hopper (211); The rotating material guide plate (213) is arranged above the middle partition plate (215); The volume of the left cavity of the upper hopper (211) is larger than the filling volume of the packaging bag (6); and a working gap is left between the upper hopper (211) and the lower hopper (212).

4. 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 blocking device (22) comprises: A feeding frame (221), wherein the four lower corners of the feeding frame (221) are connected to the upper part of the frame (1) through supporting legs, the upper middle part of the feeding frame (221) is detachably connected to the upper hopper connecting plate corresponding to the upper hopper (211), and the lower middle part of the feeding frame (221) is detachably connected to the bent connecting part of the lower hopper (212); The baffle plate guide rails (222) are symmetrically connected to both sides of the inside of the feed frame (221); A left material blocking plate (223), the left material blocking plate (223) is slidably connected to the left end between the two material blocking plate guide rails (222); A right material baffle plate (224), the right material baffle plate (224) is slidably connected to the right end between the two material baffle plate guide rails (222); A left driver (225), the left driver (225) is connected to the middle of the left outer end of the feed frame (221), a driving rod of the left driver (225) passes through the feed frame (221), and is connected to the left baffle plate (223) through a left baffle plate connecting piece; A right driver (226), the right driver (226) is connected to the middle part of the right outer end of the feed frame (221), and a driving rod of the right driver (226) passes through the feed frame (221) and is connected to the right baffle plate (224) through a right baffle plate connecting piece; Wherein, the left driver (225) and the right driver (226) are both connected to the control device (5).

5. The precise weighing and packaging system according to claim 1, characterized in that: The material balancing device (23) is arranged directly below the feeding frame (221), and the material balancing device (23) comprises: A discharge hopper (231), the upper parts of both ends of the discharge hopper (231) are symmetrically connected with discharge hopper connecting plates, and the lower part of the discharge hopper (231) is also provided with a plurality of soft curtain connecting holes; A material distribution roller (232), the material distribution roller (232) is rotatably connected to the upper part of the discharge hopper (231) at equal intervals; A material balancing roller driver (233), wherein the output shaft of each material balancing roller driver (233) is respectively connected to the end of the corresponding material balancing roller (232); The material distribution device (23) is connected to the feed frame (221) via a discharge hopper connection plate and a locking member, and each material distribution roller driver (233) is connected to the control device (5).

6. The precise weighing and packaging system according to claim 1, characterized in that: The quantitative weighing device (3) is installed on the middle cross brace of the frame (1), and the quantitative weighing device (3) comprises: A charging hopper (31), the charging hopper (31) is connected below the discharging hopper (231); A charging hopper fixing bracket (32), the charging hopper fixing bracket (32) being arranged at the upper middle part of the charging hopper (31); Weighing sensors (33), the weighing sensors (33) are respectively arranged below the four corners of the charging hopper fixing bracket (32); A charging hopper limit support (34), the charging hopper limit support (34) is respectively arranged on one side of the weighing sensor (33); Wherein, each weighing sensor (33) is connected to the control device (5).

7. The precise weighing and packaging system according to claim 6, characterized in that: The upper part of the loading hopper (31) is connected to a plurality of soft curtain connection holes below the discharging hopper (231) via a soft curtain; The middle parts of both sides of the charging hopper fixing bracket (32) are provided with bag fixing device mounting seats adapted to be connected to the bag fixing device (4); the ends of both ends of the charging hopper fixing bracket (32) are also provided with weighing sensor connecting holes adapted to be connected to the weighing sensor (33) and limit support connecting holes adapted to be connected to the charging hopper limit support (34).

8. The precise weighing and packaging system according to claim 6, characterized in that: One end of the weighing sensor (33) is detachably mounted below the weighing sensor connection hole, and the other end is connected to the middle cross brace of the frame (1) via a weighing sensor connection plate; The loading hopper limit support (34) is symmetrically arranged between the two weighing sensors (33) at each end, and the loading hopper limit support (34) includes: a limit connecting plate, one end of which is connected to the middle cross brace of the frame (1); a limit adjusting member, the limit adjusting member includes an adjusting bolt and at least two limit nuts threadedly connected to the adjusting bolt, one end of the adjusting bolt is connected to the middle part of the upper surface of the other end of the limit connecting plate, the head of the adjusting bolt is located above the limit support connection hole, the limit nut is located below the limit support connection hole, and the diameter of the limit nut is greater than the diameter of the limit support connection hole; wherein a gap is left between the limit nut and the loading hopper fixing bracket (32).

9. The precise weighing and packaging system according to claim 1, characterized in that: The bag fixing device (4) is used to fix the packaging bag (6), and the bag fixing device (4) comprises: A connecting ear seat (41) is connected to the lower part of the bag fixing device mounting seat of the charging hopper fixing bracket (32); A pressing driver (42), the pressing driver (42) is connected below the connecting ear seat (41); A pressing connecting rod (43), one end of which is hingedly connected to the output shaft of the pressing driver (42) through a connector, and a middle portion of the pressing connecting rod (43) is rotatably connected to the charging hopper (31) through a bag fixing seat; A pressing seat (44), the pressing seat (44) is hingedly connected to the other end of the pressing connecting rod (43); The pressing drive (42) is connected to the control device (5).

10. The precise weighing and packaging system according to claim 1, characterized in that: The connecting ear seat (41) and the pressing driver (42) are connected via a hinge seat; The clamping connecting rod (43) is a bent connecting rod with an obtuse angle as a whole, and the bent portion of the clamping connecting rod (43) is rotatably connected to the bag fixing connection seat via a connecting shaft; The pressing seat (44) is in the form of an elongated strip structure as a whole, and a pressing plate is connected to the pressing end of the pressing seat (44); The pressing seat (44) is provided with a plurality of through holes along its length direction.

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