An automatic weighing and packaging equipment for ton bags of ultra-fine materials

Abstract

The invention relates to an automated packaging technology, which is used to solve the problem that there is much dust when filling ton bags and the amount of granular materials in the bags after dust removal is prone to deviation. It is specifically an automated metering and packaging equipment for ton bags of ultra-fine materials, including a second conveyor belt. The invention determines the weight change of granular materials in the packaging process through a primary comparison between the discharge weight and the bagging weight at the position of a feed hopper, a secondary comparison at the position of a second conveyor belt, a tertiary comparison at the position of a connecting box and a fourth comparison at the position of a first conveyor belt, so as to ensure the accuracy of the ton bag packaging amount, and performs dust removal operations during the three comparisons to reduce the adverse effects of dust on the working environment. When it is found through comparison that there is a lot of missing weight after dust removal, the corresponding weight of granular materials is added according to the ratio of the weight of the granular materials to the output dust. No manual operation is required in the entire process of bagging the ton bags, and the packaging equipment automatically performs metering, which is more accurate, and the dust is reduced after the dust removal operation.

Description

Technical Field

[0001] The invention relates to an automatic packaging technology, in particular to an automatic ton bag metering and packaging device suitable for ultra-fine materials. Background Art

[0002] International standard ton bags are a kind of flexible transport packaging container, which is moisture-proof, dust-proof, radiation-resistant, firm and safe, and has sufficient structural strength. As container bags are easy to load and unload, and carry, the loading and unloading efficiency is significantly improved. Container bags are generally made of polyester fibers such as polypropylene and polyethylene.

[0003] In the prior art, when packing ton bags, the granular materials are contaminated with a lot of dust during transportation and packaging, so that the granular materials are prone to generate a lot of dust during bagging. The spread of dust is likely to have an adverse impact on the environment and cause breathing difficulties for workers. The dust is also likely to hinder the operation of mechanical equipment. When packing ton bags, the centrifugal fan performs dust removal on the granular materials dumped into the feed box, so that the weight of the granular materials measured at a position on the conveyor belt is different, and the amount of granular materials packaged in the ton bags is different.

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] The purpose of the present invention is to determine the weight change of granular materials in the packaging process through one comparison between the discharge weight and the bagging weight at the feed hopper position, a second comparison at the second position of the conveyor belt, a third comparison at the connecting box position and a fourth comparison at the first position of the conveyor belt, so as to ensure the accuracy of the ton bag packaging quantity, and perform dust removal operation during the three comparisons to reduce the adverse effects of dust on the working environment. When the comparison shows that there is a lot of missing weight after dust removal, the corresponding weight of granular materials is added according to the ratio of the granular material weight to the output dust. No manual operation is required in the whole process of bagging of ton bags, and the packaging equipment automatically measures, which is more accurate. The dust is reduced after the dust removal operation, so as to solve the problems that the dust is large when filling the ton bags and the amount of granular materials bagged after dust removal is prone to deviation, and an automatic metering and packaging equipment for ton bags suitable for ultra-fine materials is proposed.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] An automatic metering and packaging equipment for ton bags of ultra-fine materials comprises a conveyor belt 2, a support platform frame is arranged above one side of the upper surface of the conveyor belt 2, support legs are installed at the four corner positions of the lower surface of the support platform frame, a feed box is installed at the middle position of the lower surface inside the support platform frame, a gas storage tank is installed on the lower surface inside the support platform frame close to the feed box through a gas tank bracket, a drive motor 1 is installed at the middle position of the upper surface of the feed box, a centrifugal fan is connected to the upper surface of the feed box close to the drive motor 1 through a pipeline, a drive motor 2 is installed on the upper surface of the centrifugal fan, a hook assembly is arranged on the lower surface of the feed box, and a loading assembly is arranged on the side of the outer wall of the feed box away from the gas storage tank.

[0008] As a preferred embodiment of the present invention, the hook assembly includes a telescopic frame cylinder, telescopic frame cylinders are installed on both sides of the front and rear surfaces of the feed box, the lower end of the telescopic frame cylinder is connected to the telescopic frame, and a bag hook frame is installed at the four corners of the telescopic frame, a bag hook fixing hook is installed at the lower end of the bag hook frame, a bag hook movable hook is rotatably connected to the lower end of the bag hook frame corresponding to the bag hook fixing hook position, and a bag hook cylinder is installed on the inner side of the bag hook frame corresponding to the bag hook movable hook position.

[0009] As a preferred embodiment of the present invention, the hook assembly also includes a cylinder fixing frame, a connecting pipe box is arranged on the lower surface of the feed box, a telescopic tube is arranged inside the connecting pipe box at a position corresponding to the feed box, a discharge pipe is installed at the lower end of the connecting pipe box, a cylinder fixing frame is installed on the lower surface of the support platform frame corresponding to both sides of the connecting pipe box, a fixed plate cylinder is rotatably connected to the lower inner side of the cylinder fixing frame, a grab hook is rotatably connected to the inner side of the telescopic frame corresponding to the position of the discharge pipe, and a semicircular hoop with the same outer diameter as the discharge pipe is installed on the inner side of the grab hook.

[0010] As a preferred embodiment of the present invention, the loading assembly includes a conveyor frame box, a conveyor frame box is installed on the side of the outer wall of the feed box away from the gas storage tank, a feed port is installed on one side of the upper surface of the conveyor frame box, a feed hopper is installed inside the conveyor frame box at a position corresponding to the feed port, a conveyor belt is installed inside the conveyor frame box corresponding to the bottom of the feed hopper through a number of evenly distributed transmission rollers, a conveyor belt motor is installed at the position of the outer wall of the conveyor frame box corresponding to the transmission roller, a conveyor frame cage is arranged on the lower surface of the conveyor frame box, and a cage motor is installed on one side of the outer wall of the conveyor frame cage.

[0011] As a preferred embodiment of the present invention, a switch valve is provided at the bottom of the feed hopper, a metering device is provided inside the conveying frame box at a position corresponding to the inner side of the conveyor belt, a negative pressure air supply device is provided on the outer wall of the supporting leg at a position corresponding to the second position of the conveyor belt, and the negative pressure air supply device is connected to the air storage tank.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] During the loading process of the ton bag, the discharge weight is detected at the feed hopper position to determine whether the discharge weight is the same as the bagging weight, and then the discharge weight and bagging weight data are compared again on the conveyor belt 2. The granular material poured from the conveyor belt 2 is dusted under the action of the centrifugal fan. The granular material after dust removal is compared with the bagging weight for the third time at the connecting box position. When it is found that there is a lot of missing weight after dust removal, the corresponding weight of granular material is added according to the ratio of the granular material weight to the output dust. In the process of ton bag packaging, the discharge weight and bagging weight are compared three times by the weighing device on the conveyor belt 1. The pressure detection of the material bag structure determines whether leakage occurs during the bagging process, and the air replenishment operation determines whether the ton bag is broken. After the above situation is eliminated, the ton bag is sealed. No manual operation is required in the whole process, and the packaging equipment automatically measures, which is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0015] Figure 1 It is the main structure diagram of the present invention;

[0016] Figure 2 This is a structural diagram of the centrifugal fan of the present invention;

[0017] Figure 3 It is a structural diagram of the telescopic frame of the present invention;

[0018] Figure 4 It is a structural diagram of the feed hopper of the present invention;

[0019] In the figure: 1. Conveyor belt 2; 2. Support legs; 3. Bag hook frame; 4. Support table frame; 5. Gas storage tank; 6. Drive motor 1; 7. Conveyor rack box; 8. Feed inlet; 9. Feed box; 10. Grab hook; 11. Transmission roller; 12. Conveyor rack cage; 13. Drive motor 2; 14. Centrifugal fan; 15. Gas tank bracket; 16. Telescopic frame cylinder; 17. Take-over box; 18. Bag hook cylinder; 19. Discharge pipe; 20. Fixed plate cylinder; 21. Telescopic pipe; 22. Cylinder fixed frame; 23. Bag hook fixed hook; 24. Bag hook movable hook; 25. Telescopic frame; 26. Conveyor belt 1; 27. Feed hopper; 28. Cage motor; 29. ​​Conveyor belt motor. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example:

[0022] See also Figure 1-4As shown, an automatic metering and packaging equipment for ton bags of ultra-fine materials includes a conveyor belt 1, a support platform frame 4 is arranged above one side of the upper surface of the conveyor belt 1, and support legs 2 are installed at the four corners of the lower surface of the support platform frame 4. The height of the support platform frame 4 can be adjusted by splicing a number of support legs 2. A feed box 9 is installed at the middle position of the lower surface inside the support platform frame 4, and a circular hole with the same size as the aperture of the telescopic tube 21 is opened at the position of the lower surface of the feed box 9 corresponding to the telescopic tube 21. A gas storage tank 5 is installed on the side of the lower surface of the support platform frame 4 near the feed box 9 through a gas tank bracket 15, a driving motor 6 is installed at the middle position of the upper surface of the feed box 9, and the upper surface of the feed box 9 is connected to the driving motor 6 through a pipeline. A centrifugal fan 14 is connected, and a driving motor 2 13 is installed on the upper surface of the centrifugal fan 14. The driving motor 2 13 drives and drives the centrifugal fan 14 to rotate. When the centrifugal fan 14 rotates, the granular material and the dust are separated by centrifugal force and wind force. A hook assembly is arranged on the lower surface of the feed box 9, and the hook assembly includes a telescopic frame cylinder 16. The telescopic frame cylinder 16 is installed on both sides of the front and rear surfaces of the feed box 9. The lower end of the telescopic frame cylinder 16 is connected to a telescopic frame body 25, so that the telescopic frame cylinder 16 can adjust the position of the telescopic frame body 25 on the outer side of the connecting box 17 by adjusting the length of its own output end. A material bag hook frame 3 is installed at the four corner positions of the telescopic frame body 25, and a material bag hook fixing hook 23 is installed at the lower end of the material bag hook frame 3. The lower end of the bag hook 3 is rotatably connected to the bag hook movable hook 24 at the position corresponding to the bag hook fixed hook 23, and the bag hook cylinder 18 is installed at the inner side of the bag hook frame 3 at the position corresponding to the bag hook movable hook 24. The output end of the bag hook cylinder 18 is rotatably connected to the bag hook movable hook 24, so that the bag hook cylinder 18 can drive the bag hook movable hook 24 to rotate at an angle when the bag hook cylinder 18 itself is extended and retracted in length, so that the bag hook movable hook 24 and the bag hook fixed hook 23 can be used to grab the ton bag. The lower surface of the feed box 9 is provided with a connecting box 17, and the connecting box 17 is provided with a telescopic pipe 21 at the position corresponding to the feed box 9. The lower end of the connecting box 17 is installed with a discharge pipe 19, and the lower surface of the support platform frame 4 is provided with a cylinder fixing frame 22 on both sides corresponding to the connecting box 17. A fixed plate cylinder 20 is rotatably connected to the lower inner side of the frame 22, and a grab hook 10 is rotatably connected to the inner side of the telescopic frame 25 at a position corresponding to the discharge pipe 19. The output end of the fixed plate cylinder 20 is rotatably connected to the grab hook 10. When the fixed plate cylinder 20 changes its own length, it can drive the grab hook 10 to rotate around the connection point with the telescopic frame 25. A semicircular hoop with the same outer diameter as the discharge pipe 19 is installed on the inner side of the grab hook 10. A loading assembly is provided on the side of the outer wall of the feed box 9 away from the gas tank 5. The loading assembly includes a conveying frame box 7. A conveying frame box 7 is installed on the side of the outer wall of the feed box 9 away from the gas tank 5. A feed port 8 is installed on one side of the upper surface of the conveying frame box 7. A feed hopper 27 is installed at the position corresponding to the feed port 8 inside the conveying frame box 7.A conveyor belt 26 is installed inside the conveyor frame box 7 corresponding to the lower part of the feed hopper 27 through a plurality of evenly distributed transmission rollers 11, a conveyor belt motor 29 is installed at the position of the outer wall of the conveyor frame box 7 corresponding to the transmission roller 11, a conveyor frame cage 12 is arranged on the lower surface of the conveyor frame box 7, and a cage motor 28 is installed on one side of the outer wall of the conveyor frame cage 12;

[0023] In the prior art, when carrying out the packaging operation of ton bags, the granular materials are contaminated with a lot of dust during transportation and packaging, so that the granular materials are prone to generate a lot of dust during the bagging process. The diffusion of dust is likely to have an adverse impact on the environment and cause breathing difficulties for the workers. In addition, the dust is likely to hinder the operation of mechanical equipment.

[0024] After the granular material enters the conveyor frame box 7 from the feed port 8, the granular material is concentrated in the feed hopper 27. The weighing device below the feed hopper 27 can detect the weight change of the feed hopper 27. After the switch valve below the feed hopper 27 is opened, the granular material is released onto the conveyor belt 26. The metering device located at the conveyor belt 26 can detect the weight of the granular material placed on the conveyor belt 26. The granular material on the conveyor belt 26 is poured into the feed box 9. The granular material falls in a parabolic shape. During the falling process, it is affected by the centrifugal fan 14 above the feed box 9, so that the dust in the granular material is separated from the granular material. After being weighed at the feed hopper 27 and the conveyor belt 26, the granular material is discharged. The weighed granular material falls downward after dust removal at the position of the feed box 9, and falls into the inside of the take-over box 17. The rear telescopic frame cylinder 16 extends to push the discharge pipe 19 to descend in height. After descending to align with the height of the ton bag on the conveyor belt 21, the length of the bag hook cylinder 18 is shortened, driving the bag hook movable hook 24 to rotate and open, so that the ton bag is aligned with the four bag hooks. The length of the rear bag hook cylinder 18 is restored, so that the bag hook movable hook 24 interacts with the bag hook fixed hook 23 to clamp the ton bag, and the switch valve on the rear take-over box 17 is opened, so that the granular material inside the take-over box 17 falls into the inner bag of the ton bag, and the negative pressure air replenishing device on the rear supporting leg 2 performs air replenishing operation on the inner bag of the ton bag, so that the inner bag of the ton bag is fully inflated and then sealed;

[0025] A switch valve is provided at the bottom of the feed hopper 27, a metering device is provided at the inner position of the conveyor frame box 7 corresponding to the inner side of the conveyor belt 1 26, a negative pressure air supply device is provided at the outer wall of the support leg 2 corresponding to the position of the conveyor belt 2 1, and the negative pressure air supply device is connected to the air storage tank 5. When the ton bag is packed and evacuated, the negative pressure air supply device blows air into the inner bag of the ton bag to fully inflate the inner bag of the ton bag, so as to avoid dust caused by incomplete loading when the ton bag is removed;

[0026] In the prior art, when the ton-bag packaging operation is performed, the centrifugal fan 14 performs dust removal operation on the granular material dumped into the feed box 9, so that the weight of the granular material measured at the position of the conveyor belt 26 is different, and the amount of granular material packaged in the ton-bag is different;

[0027] The feed port 8 adds granular materials to the feed hopper 27 at regular intervals. The weighing device on the feed hopper 27 detects the weight change of the granular materials in the feed hopper 27 at all times during the feeding process, and marks the weight data of the granular materials in the feed hopper 27 before feeding as LZq, and the weight data of the granular materials in the feed hopper 27 after feeding as LZh. The maximum weight data of the granular materials that can be accommodated in the feed hopper 27 is marked as ZMax, and the minimum weight data when the granular materials need to be added in the feed hopper 27 is marked as ZMin;

[0028] The weighing device constantly detects the weight change of the granular material inside the feed hopper 27. When LZq≤ZMin, the weighing device sends a feeding signal and transmits the feeding signal to the feeding device, so that the feeding device performs the feeding operation. The weight data WL=(LZh-LZq) / T of the material added by the feeding device to the feed hopper 27 within the unit time T can be obtained through the difference between the weight data LZh and LZq within the unit time T. The time required for the feeding device to stop completely from receiving the stop signal is t1. The weight data WLt=t1*WL of the granular material added to the feed hopper 27 from receiving the stop signal to stopping completely is when LZh=ZMax-WLt. When LZh=ZMax-WLt, the weighing device sends a feeding stop signal and transmits the feeding stop signal to the feeding device, so as to prevent the feeding device from adding excessive granular material to the feed hopper 27, causing the granular material inside the feed hopper 27 to overflow.

[0029] The weight data of the granular material to be added to the ton bag is marked as DZ. When the switch valve below the feed hopper 27 is opened for discharging, the weighing device detects the weight change in the feed hopper 27, and calculates the weight data WLx of the granular material falling during the closing process of the switch valve below the feed hopper 27 through the time required for the switch valve below the feed hopper 27 to close and the weight change of the granular material in the feed hopper 27. When the weight reduction data of the granular material inside the feed hopper 27 reaches DZ-WLx, the weighing device transmits a stop discharging signal, and transmits the stop discharging signal to the switch valve below the feed hopper 27, so that the switch valve below the feed hopper 27 is closed;

[0030] When granular materials are poured into the inside of the feed box 9, the dust weight data collected at the position of the centrifugal fan 14 is FCZ, and the weight data of the granular materials received inside the connection box 17 is WLj. If FCZ + WLj = DZ, it is determined that no loss of granular materials occurs during the dust removal process. Otherwise, it is determined that the granular materials are lost during the dust removal operation. The maximum allowable error weight WCz of the granular materials in the ton bag. If (DZ - WLj) ≤ WCz, the discharging operation is performed. Otherwise, the feeding operation is carried out. The weight data BLz to be replenished at the position of the feed hopper 27 = [(DZ - WLj) / (FCZ / DZ)];

[0031] The weighing device at the position of the second conveyor belt 1 can detect the weight change of the ton bag. The weight before the ton bag is packed is DBz. If the weight data DBh after the ton bag is packed = DBz + DZ, it is determined that the packing is correct. Otherwise, it is determined that there is an error in the packing; If the discharging weight at the connection box 17 is DZ, but DBh ≠ DBz + DZ, the pressure data between the movable hook 24 and the fixed hook 23 of the bag hook at the bag hook position is detected. If there is one or more bag hook pressure data greater than the set pressure value, it is determined that there is a leakage of materials during the packing process of the ton bag; If the detected pressure data is equal to the set pressure value, the air supplement operation is carried out;

[0032] When the negative pressure air supplement device performs the air supplement operation, the reduction in the stored gas inside the gas storage tank 5 can be detected. An air pressure gauge is provided on the pipeline connecting the negative pressure air supplement device and the inner bag of the ton bag, and the air pressure gauge can detect the air pressure change inside the inner bag of the ton bag. When the reduction in the stored gas inside the gas storage tank 5 is CQj, the air pressure value inside the ton bag can reach QYs. If when the reduction in the stored gas inside the gas storage tank 5 reaches CQj, the air pressure value QYj inside the ton bag < QYs, it is determined that the ton bag is cracked and leaking, and an alarm is issued through the buzzer to inform the staff to replace the ton bag.

[0033] When the present invention is in use, after the granular material enters the conveyor frame box 7 from the feed port 8, the granular material is concentrated in the feed hopper 27. The weighing device below the feed hopper 27 can detect the weight change of the feed hopper 27. The weighing device detects the weight change of the granular material in the feed hopper 27 at all times. When LZq≤ZMin, the weighing device sends a feeding signal and transmits the feeding signal to the feeding device, so that the feeding device performs the feeding operation. The weight data WL of the material added to the feed hopper 27 by the feeding device within the unit time T can be obtained by the difference between the weight data LZh and LZq within the unit time T = (LZh-LZq) / T. The time required for the feeding device to stop completely after receiving the stop signal is When the time interval is t1, the weight data of the granular material added to the feed hopper 27 by the feeding device from receiving the stop signal to completely stopping is WLt=t1*WL. When LZh=ZMax-WLt, the weighing device sends a feeding stop signal and transmits the feeding stop signal to the feeding device to prevent the feeding device from adding excessive granular material to the feed hopper 27, causing the granular material in the feed hopper 27 to overflow. After the switch valve below the feed hopper 27 is opened, the granular material is released onto the conveyor belt 26. The metering device located at the position of the conveyor belt 26 can detect the weight of the granular material placed on the conveyor belt 26. The weight data of the granular material to be added to the ton bag is marked as DZ. The switch valve below the feed hopper 27 is opened. When discharging, the weighing device detects the weight change in the feed hopper 27, and calculates the weight data WLx of the granular material falling during the closing process of the switch valve below the feed hopper 27 through the time required for the switch valve below the feed hopper 27 to close and the weight change of the granular material in the feed hopper 27. When the weight reduction data of the granular material inside the feed hopper 27 reaches DZ-WLx, the weighing device transmits a stop discharge signal, and transmits the stop discharge signal to the switch valve below the feed hopper 27, so that the switch valve below the feed hopper 27 is closed, and the granular material on the conveyor belt 26 is dumped into the feed box 9. The granular material falls in a parabolic shape. During the falling process, it is affected by the centrifugal fan 14 above the feed box 9, so that the dust in the granular material Dust and granular materials are separated from each other. The granular materials weighed at the feed hopper 27 and the conveyor belt 26 fall downward after dust removal at the feed box 9 and fall into the connecting box 17. When the granular materials are dumped into the feed box 9, the dust weight data collected at the centrifugal fan 14 is FCZ, and the granular material weight data received in the connecting box 17 is WLj. If FCZ+WLj=DZ, it is determined that no granular materials are lost during the dust removal process. Otherwise, it is determined that the granular materials are lost during the dust removal operation. The maximum allowable error weight of the granular materials in the ton bag is WCz. If (DZ-WLj)≤WCz, the discharge operation is performed. Otherwise, the replenishment operation is performed.The weight data BLz to be replenished at the position of the feed hopper 27 is BLz = [(DZ - WLj) / (FCZ / DZ)]. The rear telescopic frame cylinder 16 extends to push the discharge pipe 19 to lower its height. After it is lowered to align with the height of the ton bag on the second conveyor belt 1, the length of the bag hook cylinder 18 is shortened, driving the movable hook 24 of the bag hook to rotate and open, so that the ton bag is aligned with the four bag hooks. Then, the length of the bag hook cylinder 18 is restored, and the movable hook 24 of the bag hook interacts with the fixed hook 23 of the bag hook to clamp the ton bag. Then, the on-off valve on the connecting pipe box 17 is opened, so that the granular material inside the connecting pipe box 17 falls into the inner bag of the ton bag. The weighing device at the position of the second conveyor belt 1 can detect the weight change of the ton bag. The weight before bagging of the ton bag is DBz. If the weight data DBh after bagging of the ton bag is DBh = DBz + DZ, it is determined that the bagging is correct; otherwise, it is determined that there is an error in bagging. If the discharge weight of the connecting pipe box 17 is DZ, but DBh ≠ DBz + DZ, the pressure data between the movable hook 24 and the fixed hook 23 of the bag hook at the position of the bag hook is detected. If there is one or more bag hook pressure data greater than the set pressure value, it is determined that there is a situation of material leakage during the bagging process of the ton bag. If the detected pressure data is equal to the set pressure value, the negative pressure air supplement device on the support leg 2 is used to supplement air into the inner bag of the ton bag. When the negative pressure air supplement device performs the air supplement operation, the internal storage tank 5 can detect the reduction in the stored gas. An air pressure gauge is provided on the pipeline connecting the negative pressure air supplement device and the inner bag of the ton bag, and the air pressure gauge can detect the air pressure change inside the inner bag of the ton bag. When the reduction in the stored gas in the internal storage tank 5 is CQj, the air pressure value inside the ton bag can reach QYs. If the air pressure value QYj < QYs inside the ton bag when the reduction in the stored gas in the internal storage tank 5 reaches CQj, it is determined that the ton bag has burst and leaked, and an alarm is issued through the buzzer to inform the staff to replace the ton bag. If the ton bag does not leak, after the inner bag of the ton bag is fully inflated, a sealing operation is performed.,

[0034] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific implementation manners. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An automatic weighing and packaging equipment for ton bags of ultra-fine materials, characterized in that: It comprises a conveyor belt 2 (1), a support platform frame (4) is arranged above one side of the upper surface of the conveyor belt 2 (1), support legs (2) are installed at four corner positions of the lower surface of the support platform frame (4), a feed box (9) is installed at the middle position of the lower surface of the support platform frame (4), a gas storage tank (5) is installed on the lower surface of the support platform frame (4) near the feed box (9) through a gas tank bracket (15), a drive motor 1 (6) is installed at the middle position of the upper surface of the feed box (9), a centrifugal fan (14) is connected to the upper surface of the feed box (9) near the drive motor 1 (6) through a pipeline, and a drive motor 2 (13) is installed on the upper surface of the centrifugal fan (14), a hook assembly is arranged on the lower surface of the feed box (9), and a feeding assembly is arranged on the side of the outer wall of the feed box (9) away from the gas storage tank (5); a connecting box (17) is arranged on the lower surface of the feed box (9); The loading assembly comprises a conveyor frame box (7), the conveyor frame box (7) being installed on a side of the outer wall of the feed box (9) away from the gas storage tank (5), a feed port (8) being installed on one side of the upper surface of the conveyor frame box (7), a feed hopper (27) being installed inside the conveyor frame box (7) at a position corresponding to the feed port (8), a conveyor belt (26) being installed inside the conveyor frame box (7) below the feed hopper (27) via a plurality of evenly distributed transmission rollers (11), a conveyor belt motor (29) being installed at a position of the outer wall of the conveyor frame box (7) corresponding to the transmission roller (11), a conveyor frame cage (12) being provided on the lower surface of the conveyor frame box (7), and a cage motor (28) being installed on one side of the outer wall of the conveyor frame cage (12); The hook assembly comprises a telescopic frame cylinder (16), the telescopic frame cylinder (16) being installed on both sides of the front and rear surfaces of the feed box (9), the lower end of the telescopic frame cylinder (16) being connected to a telescopic frame (25), a bag hook frame (3) being installed at four corners of the telescopic frame (25), a bag hook fixing hook (23) being installed at the lower end of the bag hook frame (3), a bag hook movable hook (24) being rotatably connected at a position corresponding to the bag hook fixing hook (23), and a bag hook cylinder (18) being installed at a position corresponding to the bag hook movable hook (24) on the inner side of the bag hook frame (3); A switch valve is provided at the bottom of the feed hopper (27), a metering device is provided inside the conveyor frame box (7) at a position corresponding to the inner side of the conveyor belt one (26), and a negative pressure air supply device is provided on the outer wall of the support leg (2) at a position corresponding to the conveyor belt two (1), and the negative pressure air supply device is connected to the air storage tank (5); The feed port (8) performs an operation of adding granular material into the feed hopper (27) at regular intervals. The weighing device on the feed hopper (27) detects the weight change of the granular material in the feed hopper (27) at all times during the feeding process, and marks the weight data of the granular material in the feed hopper (27) before feeding as LZq, the weight data of the granular material in the feed hopper (27) after feeding as LZh, the maximum weight data of the granular material that can be accommodated in the feed hopper (27) as ZMax, and the minimum weight data of the granular material in the feed hopper (27) when adding granular material is required as ZMin; The weighing device constantly detects the weight change of the granular material in the feed hopper (27). When LZq≤ZMin, the weighing device sends a feeding signal and transmits the feeding signal to the feeding device, so that the feeding device performs the feeding operation. The weight data WL of the material added to the feed hopper (27) by the feeding device in the unit time T can be obtained by the difference between the weight data LZh and LZq in the unit time T. , the time required for the feeding device to completely stop after receiving the stop signal is t1, then the weight data of the granular material added to the inside of the feeding hopper (27) by the feeding device from receiving the stop signal to completely stopping is WLt=t1×WL, when LZh=ZMax-WLt, the weighing device sends a feeding stop signal and transmits the feeding stop signal to the feeding device; The weight data of the granular material to be added to the ton bag is marked as DZ. When the switch valve below the feed hopper (27) is opened to discharge the material, the weighing device detects the weight change in the feed hopper (27), and calculates the weight data WLx of the granular material falling during the closing process of the switch valve below the feed hopper (27) through the time required for the switch valve below the feed hopper (27) to close and the weight change of the granular material in the feed hopper (27). When the weight reduction data of the granular material inside the feed hopper (27) reaches DZ-WLx, the weighing device transmits a stop discharge signal, and transmits the stop discharge signal to the switch valve below the feed hopper (27), so that the switch valve below the feed hopper (27) is closed; When the granular material is dumped into the feed box (9), the dust weight data collected at the position of the centrifugal fan (14) is FCZ, and the granular material weight data received in the receiving box (17) is WLj. If FCZ+WLj=DZ, it is determined that no granular material is lost during the dust removal process. Otherwise, it is determined that the granular material is lost during the dust removal operation. The maximum allowable error weight of the granular material in the ton bag is WCz. If If WCz, the material discharge operation is executed, otherwise, the material replenishment operation is performed; The weighing device at the second (1) position of the conveyor belt can detect the weight change of the ton bag. The weight before the ton bag is DBz, the weight after the ton bag is DBh, and the weight of the material discharged from the take-over box (17) is DZ, but DBh DBz+DZ, detect the pressure data between the bag hook movable hook (24) and the bag hook fixed hook (23) at the bag hook position. If one or more bag hook pressure data are greater than the set pressure value, it is determined that leakage occurs during the ton packaging process; if the detected pressure data is equal to the set pressure value, the air replenishment operation is performed; When the negative pressure air replenishing device is performing the air replenishing operation, the amount of gas stored in the air storage tank (5) can be detected. A barometer is provided on the pipeline connecting the negative pressure air replenishing device and the inner bag of the ton bag. The barometer can detect the change of the air pressure in the inner bag of the ton bag. When the amount of gas stored in the air storage tank (5) is reduced by CQj, the air pressure value in the ton bag can reach QYs. If the amount of gas stored in the air storage tank (5) is reduced by CQj, the air pressure value in the ton bag is QYj. If the bag is broken or leaking, it will be judged that the bag is broken and leaking, and an alarm will be sounded through the buzzer to inform the staff to replace the bag.

2. The automatic weighing and packaging equipment for ton bags of ultra-fine materials according to claim 1 is characterized in that: The hooking assembly also includes a cylinder fixing frame (22), a telescopic tube (21) is arranged inside the connecting pipe box (17) at a position corresponding to the feeding box (9), a discharge pipe (19) is installed at the lower end of the connecting pipe box (17), a cylinder fixing frame (22) is installed on the lower surface of the support platform frame (4) at both sides corresponding to the connecting pipe box (17), a fixed plate cylinder (20) is rotatably connected to the lower inner side of the cylinder fixing frame (22), a grab hook (10) is rotatably connected to the inner side of the telescopic frame (25) at a position corresponding to the discharge pipe (19), and a semicircular hoop with the same outer diameter as the discharge pipe (19) is installed on the inner side of the grab hook (10).

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