Powder filling apparatus

Abstract

The application provides a powder filling device, and belongs to the technical field of filling. The device comprises a storage tank, a discharge pipe coaxially communicated with the bottom of the storage tank, a discharge screw coaxially and rotationally matched with the storage tank, a feed inlet arranged at the top of the storage tank, a material blocking mechanism, two rotating rods and a rotating ring, the middle part of the two rotating rods is rotationally connected to the rotating ring, the lower end of the rotating rod is provided with a baffle, the bottom of the baffle is provided with a scraping piece, the upper end of the baffle is provided with a matching plate, the rotating connection part of the rotating rod is provided with a torsional spring, a matching ring is slidably arranged on a vertical supporting rod, a first spring is sleeved on the supporting rod, the rotating connection part of the rotating rod is located in the matching ring, the matching plate is located above the matching ring, and the elastic coefficient of the torsional spring is greater than that of the first spring. A conveying mechanism is arranged below the storage tank, a driving part is used for driving the storage tank to move and the rotating ring to rotate, two sets of locking mechanisms are arranged on the rotating ring, and the filling device effectively solves the leakage problem and has high filling weight accuracy.

Description

Technical Field

[0001] This application belongs to the field of filling technology, and in particular relates to a powder filling device. Background Technology

[0002] In the automated production of powdered materials such as grain flour, filling is a crucial step in ensuring accurate product measurement and packaging quality. Currently, common powder filling equipment typically includes a storage tank, a discharge pipe, and a discharge screw installed inside the discharge pipe. Its basic workflow is as follows: the quantitative powder weighed by the automatic weighing module is temporarily stored in the storage tank through a conveying mechanism. Then, the drive mechanism drives the discharge screw to rotate, and the screw's spiral propulsion propels the powder stably out of the discharge pipe and into the packaging tank below.

[0003] However, to ensure the discharge screw can rotate smoothly within the discharge pipe and avoid jamming due to thermal expansion, manufacturing errors, or the embedding of powder particles, a certain assembly and operating clearance must be maintained between the outer diameter of the discharge screw and the inner wall of the discharge pipe. This necessary small clearance has adverse effects in practical applications: during the intermittent filling process, when a filling is completed and the packaging can is removed before the next can is in place, or during the process of replenishing weighed powder into the storage tank, the powder stored in the storage tank will continuously leak slowly through the gap between the screw and the pipe wall under gravity. This leakage will cause powder to scatter directly onto the equipment or workbench while the equipment is waiting or during packaging container switching, resulting in material waste and environmental pollution. Simultaneously, the leakage rate is difficult to maintain constant and may occur before and after filling the packaging cans, directly causing fluctuations in the net weight of the powder entering each packaging can, making it impossible to accurately control it to the target value and resulting in inconsistent product weights. Summary of the Invention

[0004] To address the shortcomings of the prior art, this application provides a powder filling device that effectively solves the leakage problem and provides more accurate filling weight.

[0005] To achieve the above objectives, the present invention employs the following techniques:

[0006] A powder filling device, comprising:

[0007] A vertical storage tank that moves along its own axis has a discharge pipe coaxially connected to its bottom; a discharge screw for discharging powder is coaxially rotatably fitted inside the storage tank; and a feed inlet is provided at the top of the storage tank.

[0008] The material blocking mechanism includes a rotating ring coaxially rotatably mounted on the storage tank and two rotating rods. The middle parts of the two rotating rods are rotatably connected to the rotating ring and arranged symmetrically about its axis. The rotation axis of the rotating rods is arranged horizontally. A baffle is provided at the lower end of the rotating rod. A scraper is provided at the bottom of the baffle and a mating plate is provided at the upper end. A torsion spring is provided at the rotation connection of the rotating rod. When the torsion spring is in its natural state, the two baffles close the lower end of the discharge pipe.

[0009] The mating ring is horizontally and slidably mounted on the vertical support rod. A first spring that elastically supports the mating ring is sleeved on the support rod. The storage tank is coaxially located inside the mating ring. The rotating connection of the rotating rod is located inside the mating ring. The mating plate is located above the mating ring. The elastic coefficient of the torsion spring is greater than that of the first spring.

[0010] The conveying mechanism, located below the storage tank, is used to horizontally convey the packaging tanks to the bottom of the discharge pipe;

[0011] The drive unit is used to drive the storage tank to move and the rotating ring to rotate;

[0012] When the storage tank moves down and the mating plate abuts against the mating ring, the mating ring moves down and compresses the first spring. When the storage tank moves down to the predetermined distance between the discharge pipe and the bottom of the tank, the spring force of the first spring overcomes the torsion spring and causes the rotating rod to rotate. The two baffles separate and open the discharge pipe, and the bottom of the scraper is arranged horizontally.

[0013] Two locking mechanisms are provided on the rotating ring. They are used to fix the rotating rod when the storage tank moves down to a predetermined distance between the discharge pipe and the bottom of the tank, and to release the rotating rod after the storage tank rises up to the point where the discharge pipe leaves the packaging tank.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. The opening and closing action of the baffle mechanism in the filling equipment is achieved by the lifting action of the storage tank and the locking mechanism in conjunction with the torsion spring and the rotating rod, and is synchronized with the filling action. That is, when the storage tank rises to the high position, the two baffles automatically close the discharge pipe to receive the grain powder weighed by the weighing module; when the storage tank moves down to the predetermined distance between the discharge pipe and the bottom of the tank, the baffles automatically separate and open the discharge pipe for filling, which effectively avoids uncontrolled leakage of grain powder caused by the gap between the discharge screw and the wall of the discharge pipe, ensures the complete filling of each pre-weighed grain powder, and has high filling and metering accuracy.

[0016] 2. The opening and closing of the baffle is linked to the position of the packaging can, perfectly matching the automated production rhythm, which can effectively prevent spillage and cross-contamination during the can transfer process;

[0017] 3. The filling equipment adopts a dynamic and coordinated filling mode of "discharge screw rotation, synchronous rise of storage tank, and continuous rotation of scraper". It realizes progressive filling from the bottom of the tank, which greatly reduces the falling height and impact speed of powder, significantly suppresses dust flying during the filling process, and further cooperates with the real-time leveling of the scraper to make the powder evenly distributed in the tank, effectively preventing uneven density and potential quality stratification problems caused by accumulation, and providing a perfectly flat material surface for the subsequent capping process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the filling equipment according to an embodiment of this application.

[0019] Figure 2 yes Figure 1 A magnified view of part A in the middle.

[0020] Figure 3 yes Figure 1 A magnified view of part B in the middle.

[0021] Figure 4 This is a cross-sectional view of the filling equipment in this embodiment when the discharge port is located at the mouth of the packaging can.

[0022] Figure 5 yes Figure 4 A magnified view of a portion of C.

[0023] Figure 6 This is a diagram showing the state of the filling equipment outlet entering the packaging can in an embodiment of this application.

[0024] Figure 7 yes Figure 6 A magnified view of a portion of D.

[0025] Figure 8 This is a cross-sectional view of the filling equipment according to an embodiment of this application, showing the bottom of the discharge port at a predetermined distance from the bottom of the tank.

[0026] Figure 9 yes Figure 8 A magnified view of part E in the middle.

[0027] Figure 10 yes Figure 8 A magnified view of a portion of the F-axis.

[0028] Reference numerals: 1-Storage tank, 11-Discharge pipe, 12-Discharge screw, 13-Inlet, 2-Baffle mechanism, 21-Rotating ring, 211-Guide groove, 22-Rotating rod, 23-Baffle, 24-Scraper, 25-Matching plate, 26-Torsion spring, 27-Rotating seat, 271-Mounting seat, 28-Slide groove, 29-Slider, 291-Strip plate, 292-Hook, 3-Matching ring, 31-Support rod, 32-First spring, 33-Connecting rod, 34-Limiting ring, 35-Support plate, 36-Pulley, 4-Conveying mechanism, 5-Drive unit 51-Linear mechanism, 52-Mounting plate, 53-Connecting column, 54-Drive motor, 6-Locking mechanism, 61-Moving column, 62-Locking bar, 63-Locking hook, 64-Second spring, 65-Pressure ring, 66-Pressure bar, 7-Mounting platform, 71-Gantry frame, 72-Guide rod, 73-Moving block, 74-Push rod, 75-V-shaped plate, 76-Third spring, 77-Matching rod, 8-Transmission assembly, 81-Driving gear, 82-Driven gear, 83-Transmission shaft, 84-Support seat, 85-Drive gear, 86-Gear ring, 9-Packaging can. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0030] Example 1

[0031] This application provides a powder filling device for filling grain powder into packaging cans 9, such as... Figures 1-5 As shown, it includes: a storage tank 1, a material blocking mechanism 2, a mating ring 3, a conveying mechanism 4, a drive unit 5, and two sets of locking mechanisms 6.

[0032] Among them, such as Figure 1 and Figure 4 As shown, the storage tank 1 is vertically arranged and movable along its own axis. Its bottom is coaxially connected to the discharge pipe 11. The diameter of the discharge pipe 11 is smaller than the diameter of the storage tank 1. Specifically, the bottom of the storage tank 1 is an inverted conical funnel structure, and its lower end opening is coaxially connected to the discharge pipe 11 to achieve a smooth transition from the cavity of the storage tank 1 to the discharge pipe 11. The storage tank 1 is coaxially rotatably fitted with a discharge screw 12, the bottom end of which is flush with the bottom end of the discharge pipe 11. It is used to use its spiral propulsion to discharge the grain powder from the discharge pipe 11. The top of the storage tank 1 is provided with a feed inlet 13 for receiving the grain powder weighed by the automatic weighing module.

[0033] like Figure 1 , Figure 2 , Figure 4 , Figure 5As shown, the material blocking mechanism 2 includes a rotating ring 21 coaxially rotatably sleeved on the tank body of the storage tank 1. Specifically, a guide ring is coaxially provided on the tank body of the storage tank 1, and an annular groove is provided on the inner side of the rotating ring 21. The rotating ring 21 is rotatably fitted onto the guide ring through the annular groove. The material blocking mechanism 2 also includes two rotating rods 22, the middle parts of which are rotatably connected to the rotating ring 21 and arranged symmetrically about its axis. That is, the direction of the line connecting the two rotating rods 22 at the rotatable connection point is radial to the rotating ring 21. The rotation axis of the rotating rod 22 is arranged horizontally. A baffle 23 is provided at the lower end of the rotating rod 22, and a scraper 24 is provided at the bottom of the baffle 23. A mating plate 25 is provided at the upper end of the rotating rod 22, and a torsion spring 26 is provided at the rotation connection of the rotating rod 22. When the torsion spring 26 is in its natural state, the top surfaces of the two baffles 23 abut against the bottom end of the discharge pipe 11 to close the discharge pipe 11. At the same time, the scrapers 24 at the bottom of the two baffles 23 are arranged alternately, and the bottom ends of the two scrapers 24 are arranged in an inclined plane that converges inward toward the axis of the discharge pipe 11.

[0034] like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, the mating ring 3 is horizontally arranged and slidably mounted on a pair of vertical support rods 31. A first spring 32 is sleeved on the support rods 31 for elastic support of the mating ring 3. The storage tank 1 is coaxially located inside the mating ring 3. The rotating connection of the rotating rod 22 is located inside the mating ring 3. The mating plate 25 is located above the mating ring 3. The elastic coefficient of the torsion spring 26 is greater than that of the first spring 32. Figure 1 As shown, the conveying mechanism 4 is located below the storage tank 1 and is used to convey the packaging tanks 9 with the opening facing upwards in sequence along the horizontal direction to the bottom of the discharge pipe 11. Specifically, the conveying mechanism 4 can adopt a roller conveyor or a conveyor belt conveyor structure.

[0035] like Figure 1 As shown, the drive unit 5 is used to drive the storage tank 1 to move and the rotating ring 21 to rotate. When the drive unit 5 drives the storage tank 1 to move down so that the mating plate 25 abuts against the mating ring 3, the mating ring 3 moves down to compress the first spring 32. When the storage tank 1 moves down to the discharge pipe 11 at a predetermined distance from the bottom of the tank, the elastic force of the first spring 32 overcomes the torsion spring 26 to make the rotating rod 22 rotate, and the two baffles 23 separate to open the discharge pipe 11. The bottom end of the scraper 24 is arranged horizontally.

[0036] like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, two sets of locking mechanisms 6 are provided on the rotating ring 21 and correspond to the two rotating rods 22 respectively. The locking mechanism 6 is used to fix the rotating rods 22 when the storage tank 1 moves down to the discharge pipe 11 at a predetermined distance from the bottom of the tank, and to release the rotating rods 22 after the storage tank 1 rises up to the discharge pipe 11 leaving the packaging tank 9.

[0037] The powder filling equipment provided in this embodiment operates on the principle of automatically opening and closing the material blocking mechanism 2 by controlling the lifting and lowering movement of the storage tank 1, thereby tightly sealing the discharge pipe 11 during non-filling periods and preventing powder leakage. The specific workflow is as follows:

[0038] Preparation and feeding stage: such as Figure 1 , Figure 2 , Figure 4 As shown, in the initial state of the equipment, the storage tank 1 is in a high position. Under the action of the torsion spring 26, the two baffles 23 are tightly abutted, completely sealing the bottom end of the discharge pipe 11. At this time, a portion of grain powder, accurately weighed by the automatic weighing module, is temporarily stored in the storage tank 1 through the feed inlet 13. Since the bottom end of the discharge pipe 11 is sealed, the powder will not leak from the gap between the discharge screw 12 and the inner wall of the discharge pipe 11.

[0039] Descent and opening phases: such as Figures 6-9 As shown, after the conveying mechanism 4 transports the empty packaging can 9 to directly below the discharge pipe 11, the drive unit 5 drives the storage tank 1 to move downward as a whole. When the storage tank 1 moves downward to contact the mating plate 25 and begins to press down the mating ring 3, the mating ring 3 descends and compresses the first spring 32. In the initial stage of this process, since the elastic coefficient of the torsion spring 26 is greater than that of the first spring 32, the torque of the torsion spring 26 still keeps the baffle 23 closed. When the storage tank 1 moves downward to the point where the discharge pipe 11 enters the packaging can 9 and the discharge pipe 11 is a predetermined distance from the bottom of the can, the elastic force generated by the compression of the first spring 32 finally overcomes the torque of the torsion spring 26, pushing the two rotating rods 22 to rotate outward, thereby separating the two baffles 23 and opening the discharge pipe 11. At the same time, the locking mechanism 6 locks the rotating rods 22 in the open position, and the bottom end of the scraper 24 at the bottom of the baffle 23 is in a horizontal state after rotation.

[0040] Dynamic filling and synchronous leveling stage:

[0041] like Figures 6-8As shown, the drive unit 5 drives the discharge screw 12 to rotate, discharging the grain powder in the storage tank 1 from the discharge pipe 11. Since the bottom end of the discharge pipe 11, i.e., the discharge port, is close to the bottom surface of the packaging tank 9, filling is achieved from the bottom, which effectively avoids dust generated during filling at the can opening. While the discharge screw 12 rotates, the drive unit 5 controls the storage tank 1 to rise slowly at a constant speed matching the discharge speed. This ensures that the discharge port of the discharge pipe 11 and the surface of the grain powder in the packaging tank 9 are always kept close and constant, allowing the grain powder to fall in with a lower drop. In the can, this further reduces dust and impact buildup. During the filling process, the drive unit 5 also drives the rotating ring 21 to rotate at a speed that matches the discharge speed, thereby driving the rotating rod 22 connected to it and the scraper 24 fixed at its lower end to rotate synchronously around the axis of the discharge pipe 11. Since the bottom of the scraper 24 is horizontal at this time, the horizontal scraper 24 will continue to scrape and spread the grain powder that is accumulating during the rotation process, ensuring that the powder is evenly filled in the packaging can 9 from the bottom, effectively avoiding the cone-shaped pile that is easily formed in traditional filling.

[0042] Rising reset and closing phases:

[0043] When the filling volume reaches the preset value, i.e., the grain powder in the storage tank 1 is emptied, the discharge screw 12 and the rotating ring 21 both stop rotating. The drive unit 5 continues to drive the storage tank 1 to rise until the discharge pipe 11 is completely separated from the opening of the packaging tank 9. At this time, the locking mechanism 6 releases the rotating rod 22. Under the restoring torque of the torsion spring 26, the two rotating rods 22 rotate inward, causing the two baffles 23 to close again, sealing the bottom end of the discharge pipe 11. After that, the storage tank 1 returns to the high position, and the automatic weighing module continues to put the weighed grain powder into the storage tank 1. Since the bottom end of the discharge pipe 11 is sealed at this time, no leakage will be detected in the added grain powder. The above process is repeated for the next filling.

[0044] The opening and closing action of the baffle mechanism 2 in the filling equipment is achieved by the lifting action of the storage tank 1 and the locking mechanism 6 in conjunction with the torsion spring 26 and the rotating rod 22, and is synchronized with the filling action. That is, when the storage tank 1 rises to the high position, the two baffles 23 automatically close the discharge pipe 11 to receive the grain powder weighed by the weighing module; when the storage tank 1 moves down to the predetermined length from the bottom of the tank when the discharge pipe 11 is at the bottom, the baffles 23 automatically separate and open the discharge pipe 11 for filling, effectively avoiding uncontrolled leakage of grain powder caused by the gap between the discharge screw 12 and the wall of the discharge pipe 11, ensuring the complete filling of each pre-weighed grain powder, and having high filling and metering accuracy; at the same time, the opening and closing of the baffles 23 and the... The closing mechanism is linked to the position of the packaging can 9, perfectly matching the automated production cycle and effectively preventing spillage and cross-contamination during can transfer. Furthermore, the filling equipment employs a dynamic, coordinated filling mode of "discharge screw 12 rotating, storage tank 1 rising synchronously, and scraper 24 rotating continuously," achieving progressive filling from the bottom of the can. This significantly reduces the powder's falling height and impact speed, effectively suppressing dust during the filling process. Combined with the real-time leveling by the scraper 24, the powder is evenly distributed within the can, effectively preventing uneven density and potential quality stratification caused by accumulation, and providing a perfectly flat material surface for the subsequent capping process.

[0045] Preferred, such as Figure 1 and Figure 2As shown, multiple pulleys 36 are evenly arrayed along the circumference of the top surface of the horizontally arranged mating ring 3. Each pulley 36 is mounted on a pre-set bracket or mounting groove on the top surface of the mating ring 3 via a short shaft, and their rotation axes are all arranged horizontally along the radial direction of the mating ring 3. When the torsion spring 26 is in its natural state and the baffle 23 closes the discharge pipe 11, it is tilted above the mating ring 3 and does not contact the pulleys 36. When the storage tank 1 moves down, the mating plate 25 begins to abut and press down on the mating ring 3. As the storage tank 1 continues to move down, the first spring... The upward reaction force generated by the compression of rod 32 acts on mating plate 25 through mating ring 3. This force generates a torque that causes rotating rod 22 to rotate outward. Under the action of the torque, mating plate 25 starts to rotate from an inclined state to a horizontal direction. When storage tank 1 moves down to a predetermined distance between discharge pipe 11 and bottom of packaging tank 9, mating plate 25 rotates to a horizontal state parallel to the top surface of mating ring 3. At this time, the bottom surface of mating plate 25 is completely supported by the rolling of pulleys 36 arranged below, achieving surface contact support with low frictional resistance. This state is locked by locking mechanism 6 until filling is completed. By setting up pulley 36, the sliding friction between mating plate 25 and mating ring 3 is converted into rolling friction of pulley 36, which effectively reduces the coefficient of friction. This makes the rotating rod 22 more sensitive and smoother in the process of overcoming the torque of torsion spring 26. At the same time, it effectively avoids dry friction or scraping that may occur between the mating plate 25 and mating ring 3 due to direct sliding, effectively eliminates the risk of the mechanism being unable to move smoothly or getting stuck due to frictional resistance, and effectively extends the service life of moving parts.

[0046] Specifically, such as Figure 1 As shown, the drive unit 5 includes a linear mechanism 51 fixedly mounted on the equipment frame and located directly above the storage tank 1. Specifically, it can be in the form of a linear cylinder, hydraulic cylinder, etc. Its drive end is vertically downward and is fixedly connected to a horizontally set mounting plate 52. The mounting plate 52 is rigidly connected to the top of the storage tank 1 below through a pair of connecting columns 53, thereby driving the storage tank 1 to perform vertical lifting and lowering movements. A drive motor 54 is fixedly mounted at the bottom of the mounting plate 52. Its drive end is vertically downward and is coaxially connected to the upper end of the discharge screw 12 in the storage tank 1 through a coupling, directly driving it to rotate for material discharge operation.

[0047] Furthermore, such as Figure 6 and Figure 10As shown, in order to synchronize the rotational scraping action of the scraper 24 with the material discharge action, a transmission assembly 8 is provided between the drive motor 54 and the rotating ring 21. This assembly includes a drive gear 81 coaxially fixedly mounted on the drive end of the drive motor 54, which meshes with a driven gear 82, forming a first transmission pair. The center of the bottom surface of the driven gear 82 is fixedly connected to the upper end of a vertically arranged transmission shaft 83 located on one side of the storage tank 1. The transmission shaft 83 is rotated via a support seat 84 fixed to the outer wall of the storage tank 1. A drive gear 85 is coaxially connected to the lower end of the transmission shaft 83. A gear ring 86 is coaxially rotatably sleeved on the outer wall of the storage tank 1. The gear ring 86 is supported by a bearing and meshes with the drive gear 85, forming a secondary transmission pair. The rotating ring 21 is fixedly connected to the gear ring 86 through a connector. Therefore, the power of the drive motor 54 is transmitted sequentially through the driving gear 81, driven gear 82, transmission shaft 83, drive gear 85, and gear ring 86, ultimately driving the rotating ring 21 and its scraper 24 to rotate synchronously. The matching relationship between the rotational speed of the rotating ring 21 (i.e., the scraper flattening frequency) and the rotational speed of the discharge screw 12 (i.e., the discharge speed) is achieved by the gear ratio of each gear in the designed and fixed transmission assembly 8.

[0048] Example 2

[0049] As a further implementation of the above embodiment 1, such as Figure 1 , Figure 2 , Figure 4 . Figure 5 As shown, two pairs of rotating seats 27 are symmetrically arranged on the rotating ring 21 about its axis. The line connecting the two rotating seats 27 is arranged radially along the rotating ring 21. Each pair of rotating seats 27 is used to install a rotating rod 22, that is, the middle part of the rotating rod 22 is rotatably connected to the corresponding pair of rotating seats 27 through a rotating shaft. A sliding groove 28 is opened on one side of the upper end of the rotating seat 27, which is arranged along its length. A slider 29 is slidably fitted in the sliding groove 28. The slider 29 is rotatably connected to one end of a strip plate 291 through a short shaft, and its rotation axis is parallel to the rotation axis of the corresponding rotating rod 22. A rotating seat 27 is fixedly equipped with There is a mounting base 271 located above the rotating connection of the rotating rod 22. The strip plate 291 slides through the corresponding mounting base 271 along the radial direction of the rotating ring 21. The connection point between the strip plate 291 and the slider 29, the rotation axis of the rotating rod 22, and the sliding engagement point between the strip plate 291 and the mounting base 271 constitute a dynamic triangular linkage mechanism. When the strip plate 291 slides radially inward or outward along the rotating ring 21, the movement of the slider 29 in the groove 28 can drive the rotating rod 22 to swing around its rotation center, thereby realizing the closing and opening of the baffle 23.

[0050] like Figure 2 , Figure 4 , Figure 5 , Figure 8 , Figure 9 As shown, the strip plate 291 has a downward-bent barb 292 at one end facing the axis of the storage tank 1. The top edge of the rotating ring 21 has two vertically oriented guide grooves 211 corresponding to the strip plate 291. Each guide groove 211 has a vertically slidingly fitted movable column 61. A locking bar 62 is connected to the lower end of the movable column 61, and the length direction of the locking bar 62 is consistent with the sliding direction of the strip plate 291. An upward-bent locking hook 63 is provided at one end of the locking bar 62 facing the corresponding strip plate 291. A second spring 64 is provided inside the guide groove 211, with its two ends connected to the bottom of the movable column 61 and the guide bar 64, respectively. Between the bottom of the groove 211, an upward elastic support force is provided for the movable column 61 and the locking strip 62; a pressure ring 65 is coaxially provided at a predetermined distance above the mating ring 3, and the pressure ring 65 is rigidly connected to the mating ring 3 below through two connecting rods 33, so that the two form an integral frame; a limiting ring 34 is coaxially fixed on the support rod 31; when the first spring 32 is in the natural state, the bottom surface of the mating ring 3 abuts against the limiting ring 34, and this position is the mechanical upper limit of the mating ring 3; a pressure strip 66 extending radially along the pressure ring 65 is connected to the upper end of each movable column 61, and the vertical downward projection of the pressure ring 65 falls on the pressure strip 66.

[0051] In application, the locking process of locking mechanism 6 is as follows: Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, in the initial state, the locking mechanism 6 is not locked, and the baffle 23 is closed under the action of the torsion spring 26. When the storage tank 1 moves down, the mating plate 25 presses against the mating ring 3 and compresses the first spring 32. Its elastic force acts on the mating plate 25 through the pulley 36, driving the rotating rod 22 to rotate outward. This rotation is converted into the sliding of the strip plate 291 radially inward along the rotating ring 21 through the triangular linkage mechanism. When the strip plate 291 moves inward, the inclined surface of its front end hook 292 contacts and presses against the inclined surface of the locking hook 63, pressing the movable column 61 downward, compressing the second spring 64, and causing the hook 292 to slide past the locking hook 63. The storage tank 1 continues to descend. When the storage tank 1 moves down to the point where the discharge pipe 11 is a predetermined distance from the bottom of the tank, the rotating rod 22 rotates to the position, and the baffle 23 is completely separated. At this time, the strip plate 291 moves inward to the limit position, and its hook 292 completely passes over the locking hook 63. The compressed second spring 64 immediately releases its elastic force, pushing the movable column 61 and the locking bar 62 upward, so that the locking hook 63 hooks the barb 292 of the strip plate 291 from below, thereby locking the strip plate 291 and the entire material blocking mechanism in the fully open state.

[0052] The release process of locking mechanism 6 is as follows: Figures 5-9As shown, after filling is completed, the storage tank 1 continues to rise, driving the rotating ring 21, rotating rod 22 and other structures to rise. When the storage tank 1 rises to the point where the mating ring 3 abuts against the limiting ring 34 of the support rod 31, the mating ring 3 and the pressure ring 65 rigidly connected to it stop rising. At this time, the discharge pipe 11 has completely left the opening of the packaging tank 9. After the storage tank 1 continues to rise, the pressure ring 65 will abut against and press down the pressure bar 66 at the upper end of the movable column 61, which is still in the locked state. The pressure bar 66 will directly transmit the downward pressure to the movable column 61, driving it to overcome the elastic force of the second spring 64 and move downward, thereby completely separating the locking hook 63 from the barb 292 and actively releasing the lock. After the lock is released, the rotating rod 22 will quickly rotate under the action of the restoring torque of the torsion spring 26, driving the baffle 23 to close reliably.

[0053] The locking mechanism 6 links the opening action of the baffle 23 with the downward movement depth of the storage tank 1. Only when the discharge pipe 11 reaches the predetermined working position at the bottom of the packaging tank 9 will the locking hook 63 automatically spring up under the action of the second spring 64, hooking the barb 292 of the strip plate 291 and locking the baffle 23 in the fully open position. This design ensures that the baffle 23 is only opened at the filling position and remains in a stable open state throughout the filling process, providing a basis for uniform discharge and effectively improving the reliability of the filling equipment. At the same time, through the cooperation of the pressure ring 65 and the pressure bar 66, the strip plate 291 is released in the process of the storage tank 1 rising to the high position and before the next batch of weighed grain powder is delivered, automatically closing the discharge pipe 11. The whole process is controlled by mechanical operation, which can realize reliable unlocking operation, thereby improving the automation and reliability of the filling equipment.

[0054] Example 3

[0055] As a further implementation of the above embodiments 1-2, such as Figure 1 and Figure 3 As shown, a mounting platform 7 is provided directly below the storage tank 1. The lower end of the support rod 31 is fixed on the mounting platform 7. The first spring 32 is connected between the mating ring 3 and the mounting platform 7. A conveying mechanism 4 for conveying the packaging tank 9 is installed on the mounting platform 7. Specifically, the conveying mechanism 4 can adopt a roller conveyor or a conveyor belt. A gantry frame 71 is fixed on the mounting platforms 7 on both sides of the storage tank 1. A push rod 74 arranged in the radial direction of the storage tank 1 is mounted on the top of the gantry frame 71. The center lines of the two push rods 74 coincide, and a V-shaped plate 75 with opposite openings is installed at the opposite ends of the two push rods, i.e., the ends facing the axis of the storage tank. The two push rods 74 can move towards each other or move away from each other synchronously.

[0056] To guide and move the push rod 74, a pair of guide rods 72 parallel to the push rod 74 can be set at the top of the portal frame 71. A movable block 73 slides through the guide rods 72, and the push rod 74 slides through the movable block 73, so that the push rod 74 can slide relative to the movable block 73 and move together with the movable block 73.

[0057] To provide flexible clamping force and allow the V-shaped plate 75 to self-adapt, a third spring 76 can be sleeved on the push rod 74, connecting the V-shaped plate 75 and the movable block 73. Two radially outwardly extending support plates 35 are symmetrically provided on the edge of the mating ring 3. Each support plate 35 is rotatably connected to the corresponding movable block 73 via the two ends of a mating rod 77. The rotation axes corresponding to the two ends of the mating rod 77 are horizontal and parallel to each other. Thus, as... Figure 4 and Figure 8 The cross-sectional view shown shows that the mating ring 3, the mating rods 77 on both sides, and the two push rods 74 together form a dynamically variable inverted isosceles trapezoidal linkage mechanism; the elastic coefficient of the third spring 76 is less than that of the torsion spring 26.

[0058] In application, when the drive unit 5 drives the storage tank 1 to move downward for filling, the mating ring 3 moves downward accordingly. The downward movement of the mating ring 3 drives the two movable blocks 73 to move towards each other synchronously along the guide rod 72 through the support plates 35 on both sides and the mating rod 77. The inward movement of the movable blocks 73 pushes the push rod 74 and the V-shaped plate 75 towards the packaging tank 9. The V-shaped plates 75 on both sides contact the outer wall of the packaging tank 9 with their inclined surfaces. Even if the initial position of the packaging tank 9 is slightly deviated, it can be automatically pushed to the axis of the storage tank 1 and the discharge pipe 11 under the guidance of the V-shaped inclined surfaces. Directly below, precise centering is achieved. When the V-shaped plate 75 contacts the packaging can 9, if they continue to move towards each other, the push rod 74 will overcome the elastic force of the third spring 76 and slide relative to the movable block 73, meaning the V-shaped plate remains basically stationary. The movable block 73 continues to move inward, compressing the third spring 76. At this time, the reaction force generated by the compression of the third spring 76 is the flexible clamping force applied to the packaging can 9. Since the elastic coefficient of the third spring 76 is small and much smaller than that of the torsion spring 26, the clamping force is gradually established at this stage and will not impact or crush the packaging can 9. After filling is completed, the storage tank 1 rises, and the cooperating ring 3 rises accordingly. Through the inverted isosceles trapezoidal structure, the movable block 73 is driven to separate in opposite directions. The reset of the third spring 76 first causes the V-shaped plate 75 to loosen its clamping of the packaging can 9. Then, the movable block 73 drives the V-shaped plate 75 to completely return to the initial separation position, releasing the constraint on the packaging can 9, making it easy for the conveying mechanism 4 to send it away.

[0059] The purpose of the above structure is to automatically correct the positional error of the packaging can 9 caused by the conveying mechanism 4 by using the inclined guide of the V-shaped plate 75, and to ensure the precise alignment of the discharge pipe 11 with the mouth of the packaging can 9. This is a prerequisite for ensuring that the filling is not spilled and the weight is accurate, and further improves the reliability and accuracy of the filling equipment.

[0060] The above description is only a preferred embodiment of this application and is not intended to limit this application. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application.

Claims

1. A powder filling device, characterized in that, include: A vertical storage tank (1) that moves along its own axis has a discharge screw (12) inside for discharging powder, a feed inlet (13) at the top, and a discharge pipe (11) at the bottom. The material blocking mechanism (2) includes a rotating ring (21) coaxially rotatably mounted on the storage tank (1) and two rotating rods (22). The middle part of the rotating rod (22) is rotatably connected to the rotating ring (21) and a torsion spring (26) is provided at the rotatable connection. The rotation axis of the rotating rod (22) is arranged horizontally. A baffle (23) is provided at the lower end of the rotating rod (22) and a mating plate (25) is provided at the upper end. A scraper (24) is provided at the bottom of the baffle (23). When the torsion spring (26) is in its natural state, the two baffles (23) close the lower end of the discharge pipe (11). The mating ring (3) is horizontally set and slides through the vertical support rod (31). The support rod (31) is fitted with a first spring (32) that elastically supports the mating ring (3). The storage tank (1) is coaxially located inside the mating ring (3). The rotating connection of the rotating rod (22) is located inside the mating ring (3). The mating plate (25) is located above the mating ring (3). The elastic coefficient of the torsion spring (26) is greater than that of the first spring (32). The conveying mechanism (4) is located below the storage tank (1) and is used to horizontally convey the packaging tank (9) to the bottom of the discharge pipe (11); Drive unit (5) is used to drive the storage tank (1) to move and the rotating ring (21) to rotate; When the storage tank (1) moves down and the mating plate (25) comes into contact with the mating ring (3), the mating ring (3) moves down and compresses the first spring (32) until the storage tank (1) moves down to the predetermined distance between the discharge pipe (11) and the bottom of the tank. At this point, the first spring (32) is no longer compressed and the mating ring (3) stops moving down. When the storage tank (1) continues to descend, the stationary mating ring (3) presses against the mating plate (25) and forces the torsion spring (26) to rotate, thereby causing the rotating rod (22) to rotate. The two baffles (23) separate and open the discharge pipe (11), and the bottom of the scraper (24) is arranged horizontally. Two sets of locking mechanisms (6) are provided on the rotating ring (21) to fix the rotating rod (22) when the storage tank (1) moves down to the discharge pipe (11) at a predetermined distance from the bottom of the tank, and to release the rotating rod (22) after the storage tank (1) rises up to the discharge pipe (11) and leaves the packaging tank (9).

2. The powder filling equipment according to claim 1, characterized in that, The rotating ring (21) is provided with two pairs of rotating seats (27) arranged in a circular array around it, and two rotating rods (22) are rotatably connected to the corresponding rotating seats (27); a sliding groove (28) is provided on one side of the upper end of the rotating rod (22) along its length direction, and a slider (29) is slidably fitted in it; the slider (29) is rotatably connected to one end of a strip plate (291), and its rotation axis is parallel to the rotation axis of the corresponding rotating rod (22); the rotating seat (27) is provided with a mounting seat (271) located above the rotation connection of the rotating rod (22), and the strip plate (291) slides radially through the corresponding mounting seat (271) along the rotating ring (21); the rotation axis of the strip plate (291), the rotation axis of the rotating rod (22), and the sliding fit between the strip plate (291) and the mounting seat (271) form a triangular structure; the locking mechanism (6) is used to fix the strip plate (291).

3. The powder filling equipment according to claim 2, characterized in that, The strip plate (291) has a downward-facing barb (292) at one end facing the storage tank (1); the top edge of the rotating ring (21) has two guide grooves (211) arranged in a circular array; the locking mechanism (6) includes a movable column (61) that slides vertically in the corresponding guide groove (211), and its lower end is connected to a locking bar (62) whose length direction is consistent with that of the strip plate (291); the locking bar (62) has an upward-facing hook (63) at one end facing the strip plate (291); a second spring is provided in the guide groove (211). 64), which is connected between the bottom of the movable column (61) and the bottom of the guide groove (211); the barb (292) and the locking hook (63) are parallel inclined surfaces at opposite ends; when the strip plate (291) moves toward the corresponding locking strip (62), the inclined surface of the barb (292) is used to abut against the inclined surface of the locking hook (63) to press down the movable column (61); when the discharge pipe (11) is a predetermined distance from the bottom of the tank, the second spring (64) is used to lift the movable column (61), and the locking hook (63) hooks the barb (292) to fix the strip plate (291).

4. The powder filling equipment according to claim 3, characterized in that, A pressure ring (65) is coaxially provided at a predetermined distance above the mating ring (3), and the pressure ring (65) and the mating ring (3) are rigidly connected by a connecting rod (33); a limiting ring (34) is provided on the support rod (31); when the first spring (32) is in its natural state, the mating ring (3) abuts against the limiting ring (34); a pressure strip (66) is connected to the upper end of the movable column (61) and arranged radially along the pressure ring (65); when the storage tank (1) rises and the mating ring (3) abuts against the limiting ring (34) and the discharge pipe (11) leaves the packaging tank (9), the pressure ring (65) is used to press down the pressure strip (66) as the storage tank (1) rises, so as to drive the movable column (61) to move down and disengage the locking hook (63) from the barb (292), thereby releasing the strip plate (291).

5. A powder filling device according to claim 2, characterized in that, A mounting platform (7) is provided below the storage tank (1), and a gantry frame (71) is provided on both sides of the conveying mechanism (4). Each gantry frame (71) is equipped with push rods (74) arranged radially along the storage tank (1) and whose center lines coincide. The opposite ends of the two push rods (74) are provided with V-shaped plates (75) with opposite openings. The two push rods (74) are arranged to move towards each other or to separate in opposite directions.

6. The powder filling equipment according to claim 5, characterized in that, The top of the portal frame (71) is provided with a pair of guide rods (72) parallel to the push rod (74), and a movable block (73) slides through them; the push rod (74) slides through the movable block (73); a third spring (76) is sleeved on the push rod (74), which is connected between the V-shaped plate (75) and the movable block (73); the edge of the mating ring (3) is provided with two support plates (35) that correspond to the upper and lower parts of the two movable blocks (73), and each support plate (35) is rotatably connected to the corresponding movable block (73) through the two ends of a mating rod (77); the elastic coefficient of the third spring (76) is less than that of the torsion spring (26).

7. The powder filling equipment according to claim 1, characterized in that, The top surface of the mating ring (3) is provided with pulleys (36) arranged in a circular array around it, and the rotation axis of each pulley (36) is arranged radially along the mating ring (3); when the torsion spring (26) is in its natural state, the mating plate (25) is tilted above the mating ring (3); when the storage tank (1) moves down to the discharge pipe (11) at a predetermined distance from the bottom of the tank, the mating plate (25) rotates to be flush with the top surface of the mating ring (3) and rolls into contact with the pulleys (36).

8. The powder filling equipment according to claim 1, characterized in that, The drive unit (5) includes a linear mechanism (51) fixed above the storage tank (1), with its drive end facing vertically and connected to a mounting plate (52). The mounting plate (52) is connected to the storage tank (1) via a connecting column (53).

9. A powder filling device according to claim 8, characterized in that, The bottom of the mounting plate (52) is provided with a drive motor (54), whose drive end is coaxially connected to the discharge screw (12). A transmission assembly (8) is provided between the drive motor (54) and the rotating ring (21) to cooperate with the drive motor (54) to synchronously drive the rotating ring (21).

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