A sealed underfeeding weighing device suitable for hazardous chemicals

Abstract

The application provides a sealed material discharging and weighing device suitable for hazardous chemicals, which comprises a rack and a material bottle assembly line, the material bottle assembly line is arranged at the middle part of the rack, and the material bottle assembly line is used for transferring a material bottle body; a discharging and weighing mechanism for accurately discharging the hazardous chemicals into the material bottle body and weighing is arranged on the rack; a pushing mechanism for pushing the material bottle body to the lower part of the discharging and weighing mechanism is arranged on the rack; and a pushing-out mechanism for pushing the material bottle body back to the material bottle assembly line is arranged on the rack. The device has the advantages of uniform and smooth discharging, no dust and material accumulation, and high weighing precision.

Description

Technical Field

[0001] This invention relates to the field of hazardous chemical packaging technology, specifically to a sealed feeding and weighing device suitable for hazardous chemicals. Background Technology

[0002] In modern industrial production, especially in the fields of chemicals, pharmaceuticals, pesticides, and new materials, a large number of powdered hazardous chemicals (referred to as "hazardous chemicals") with characteristics such as flammability, explosiveness, toxicity, and strong corrosivity are involved. The feeding and packaging of these powdered materials are critical processes in the entire production process that have extremely high requirements for safety, environmental protection, and precision.

[0003] Currently, to reduce the risk of operators directly contacting hazardous chemicals, the industry has developed and applied various automated material handling and packaging systems. For example, by using screw conveyors, vacuum feeders, or gravity silos in conjunction with automatic bag clamping devices and weighing modules, basic automation of the process from material storage to packaging has been achieved. These automated solutions largely replace traditional high-risk operations such as manual close-range material handling, receiving, and manual weighing, significantly improving production safety and reducing labor costs.

[0004] However, despite improvements in automation, existing technologies still face a series of common and challenging technical difficulties in handling powdered hazardous chemicals, severely limiting production efficiency, product quality, and operational stability: Poor metering accuracy: Due to the common physical characteristics of powdered materials, such as poor flowability, easy moisture absorption and clumping, high coefficient of friction between particles, and easy electrostatic agglomeration, their flow rate is extremely unstable during transportation and descent. Traditional volumetric or simple loss-in-weight metering methods are difficult to achieve high-precision continuous or batch control, especially in situations requiring small dosages and high-precision proportions. The error rate is often high, directly affecting the quality consistency of the final product. Material blockage and operational interruption: Due to its poor flow characteristics, material is prone to blockage at silo outlets, pipe bends, valves, and packaging bag openings. Once blockage occurs, it can lead to a sudden drop in feeding speed, affecting production efficiency; or it can cause equipment overload alarms or even force a shutdown for cleaning, not only disrupting the continuity of production but also increasing the risk of operators having to intervene under abnormal conditions. Dust pollution and environmental hazards: In open or semi-enclosed material feeding and packaging processes, especially at material drop points with significant drop heights, fine dust can easily become airborne and disperse. This not only wastes materials, but more importantly, for hazardous chemicals, dust can form explosive gas mixtures or toxic and harmful environments, seriously threatening the occupational health and safety of operators and posing a potential pollution risk to the surrounding ecological environment. Existing dust collection devices are often ineffective due to improper airflow matching or inadequate sealing.

[0005] In summary, existing feeding, weighing, and packaging technologies for powdered hazardous chemicals cannot simultaneously meet the comprehensive requirements of high precision, high stability, and high sealing. Therefore, designing a feeding and weighing mechanism that can effectively overcome the defects of powder flowability, achieve accurate metering, and ensure a leak-free, fully sealed process has become a crucial technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention proposes a sealed feeding and weighing device suitable for hazardous chemicals, which provides uniform and smooth feeding, eliminates dust and material accumulation, and achieves high weighing accuracy.

[0007] To achieve the above objectives, the present invention provides a sealed dispensing and weighing device for hazardous chemicals, comprising a frame and a bottle conveyor line. The bottle conveyor line is located in the middle of the frame and is used to transfer bottle bodies. The frame is provided with a dispensing and weighing mechanism for accurately dispensing and weighing the hazardous chemicals into the bottle bodies. The frame is also provided with a pushing mechanism for pushing the bottle bodies below the dispensing and weighing mechanism, and a pushing mechanism for pushing the bottle bodies back onto the bottle conveyor line. Furthermore, the frame includes a first frame and a second frame, which are respectively set on both sides of the bottle production line. The pushing mechanism is set on the first frame, and the pushing mechanism is set on the second frame. The pushing mechanism and the pushing mechanism are at the same height. The feeding and weighing mechanism is set above the second frame, and the projection of the feeding and weighing mechanism is located between the pushing mechanism and the pushing mechanism.

[0008] Furthermore, the feeding and weighing mechanism includes a main frame, a feeding component, and a weighing component. The feeding component is located on the top of the main frame, and the weighing component is located inside the main frame. The feeding component includes a feeding box, which contains a feeding pipe. The feeding pipe has a square tube structure. The top of the feeding pipe passes through the top of the feeding box and bends to one side. The top of the feeding pipe has a feeding port, and the bottom of the feeding pipe is set as an arc-shaped discharge port. The discharge port is equipped with a discharge gate, and the bottom of the discharge gate is an arc shape adapted to the discharge port.

[0009] Furthermore, a gate shaft is provided inside the feeding box, and the side of the feeding gate is rotatably connected to the gate shaft. A gate drive box is provided on the side of the feeding box, and a gate drive cylinder is provided inside the gate drive box. The bottom of the gate drive cylinder is rotatably connected to the inner wall of the gate shaft. A gate swing arm is provided at the end of the piston rod of the gate drive cylinder. The gate swing arm is a two-link structure. The end of the gate swing arm away from the gate drive cylinder is rotatably connected to the end of the gate shaft. The gate drive cylinder drives the gate shaft to reciprocate, and the gate shaft drives the feeding gate to reciprocate.

[0010] Furthermore, the top of the main frame is provided with a transitional flexible sleeve connected to the bottom of the feeding box. The bottom of the transitional flexible sleeve is provided with a feeding hopper. The feeding hopper is a bucket-shaped structure with a gradually decreasing cross-sectional area. The bottom of the feeding hopper is provided with a feeding port. The end of the feeding port has a flexible block. The side of the feeding hopper is provided with an exhaust port. The inside of the feeding hopper is provided with an exhaust chamber that communicates with the discharge port. The exhaust chamber is a thin-walled structure that is separated from the internal cavity of the feeding hopper. The exhaust chamber extends downward into the feeding port. The side of the feeding hopper is provided with a vibrator.

[0011] Furthermore, the main frame is equipped with a lifting assembly, which includes a bottle support platform and a lifting cylinder. The bottle support platform is equipped with a pair of bottle limiting plates, and a bottle positioning sensor is provided at one end of each bottle limiting plate. The lifting cylinders are respectively located on the outer sides of the bottle limiting plates on both sides and installed on the inner side of the main frame. The bottom of the lifting cylinder is fixed, and the piston rod of the lifting cylinder is set downward. The end of the piston rod of the lifting cylinder is connected to the bottle support platform.

[0012] Furthermore, the second frame is equipped with a residual material control cylinder on the side of the main frame. The piston rod of the residual material control cylinder is equipped with a residual material box at its end. When the piston rod of the residual material control cylinder extends, the residual material box moves to below the discharge port to block the opening of the material bottle body. When the piston rod of the residual material control cylinder retracts, the residual material box moves away to expose the opening of the material bottle body.

[0013] Furthermore, the weighing assembly includes a load cell disposed below the bottom plate of the main frame, the bottom of the load cell being disposed on the top plate of the second frame, and anti-collision blocks located on both sides of the load cell being disposed on the bottom plate of the main frame.

[0014] Furthermore, the pushing mechanism includes a pushing cylinder and a pushing plate, and the pushing mechanism includes a pushing cylinder and a pushing plate. The piston rods of the pushing cylinder and the pushing cylinder are both positioned towards the central bottle conveyor line, and the pushing cylinder and the pushing cylinder are at the same height.

[0015] Furthermore, a limiting cylinder is provided on the side of the ejection component, and a limiting baffle is provided at the end of the piston rod of the limiting cylinder. A continuous bottle holder is provided on the bottle production line, and a space for accommodating the bottle body is formed between two adjacent bottle holders.

[0016] This invention provides a sealed feeding and weighing device for hazardous chemicals that can smoothly discharge materials while preventing dust from flying and material from accumulating and clumping inside the hopper, and also features a high-precision weighing system. It avoids frequent maintenance and intervention by personnel, effectively reducing occupational risks. Attached Figure Description

[0017] The invention will now be further described and explained with reference to the accompanying drawings.

[0018] Figure 1This is a schematic diagram of the overall structure of a sealed feeding and weighing device for hazardous chemicals, which is a preferred embodiment of the present invention.

[0019] Figure 2 It is a structural diagram used to illustrate a part of the lifting component.

[0020] Figure 3 This is a schematic diagram illustrating a portion of the material feeding and weighing mechanism.

[0021] Figure 4 This is a schematic diagram illustrating the internal structure of the gate drive box.

[0022] Figure 5 It is a sectional view used to show the internal structure of the feeding box.

[0023] Figure 6 It is a cross-sectional view used to show the internal structure of the hopper.

[0024] Figure 7 This is a schematic diagram illustrating a portion of the bottle production line.

[0025] Reference numerals: 11. First frame; 12. Second frame; 2. Bottle production line; 21. Bottle holder; 22. Bottle body; 3. Push cylinder; 31. Push plate; 4. Push cylinder; 41. Push plate; 5. Main frame; 51. Transition flexible sleeve; 52. Feed hopper; 53. Feed outlet; 54. Exhaust port; 55. Exhaust chamber; 56. Vibrator; 57. Bottle support platform; 571. Bottle 58. Limit plate; 59. Bottle positioning sensor; 60. Lifting cylinder; 61. Feeding box; 62. Feeding pipe; 63. Feeding port; 64. Discharge port; 65. Discharge gate; 66. Gate shaft; 67. Gate drive box; 68. Gate drive cylinder; 69. Gate swing arm; 71. Weighing sensor; 72. Anti-collision block; 73. Residual material control cylinder; 74. Residual material box; 8. Limit cylinder; 81. Limit baffle. Detailed Implementation

[0026] The technical solution of the present invention will be more clearly and completely explained below with reference to the accompanying drawings and through the description of preferred embodiments of the present invention.

[0027] like Figure 1 and Figure 2 As shown, a preferred embodiment of the present invention provides a sealed feeding and weighing device for hazardous chemicals, comprising a frame and a bottle conveyor line 2. The bottle conveyor line 2 is located in the middle of the frame and is used to transfer bottle bodies 22. The frame is provided with a feeding and weighing mechanism for accurately feeding hazardous chemicals into the bottle bodies 22 and weighing them. The frame is also provided with a pushing mechanism for pushing the bottle bodies 22 below the feeding and weighing mechanism, and a pushing mechanism for pushing the bottle bodies 22 back into the bottle conveyor line 2.

[0028] like Figure 1 As shown, the frame includes a first frame 11 and a second frame 12. The first frame 11 and the second frame 12 are respectively set on both sides of the bottle production line 2. The pushing mechanism is set on the first frame 11, and the pushing mechanism is set on the second frame 12. The pushing mechanism and the pushing mechanism are at the same height. The feeding and weighing mechanism is set above the second frame 12. The projection of the feeding and weighing mechanism is located between the pushing mechanism and the pushing mechanism.

[0029] like Figure 2 and Figure 3 As shown, the feeding and weighing mechanism includes a main frame 5, a feeding component, and a weighing component. The feeding component is located on the top of the main frame 5, and the weighing component is located inside the main frame 5. The feeding component includes a feeding box 61, and a feeding pipe 62 is provided inside the feeding box 61. The feeding pipe 62 has a square tube structure. The top of the feeding pipe 62 passes through the top of the feeding box 61 and bends to one side. The top of the feeding pipe 62 is provided with a feeding port 63, and the bottom of the feeding pipe 62 is provided with an arc-shaped discharge port 64. A discharge gate 65 is provided on the discharge port 64, and the bottom of the discharge gate 65 is an arc shape adapted to the discharge port 64.

[0030] like Figure 4 and Figure 5 As shown, a gate shaft 66 is provided inside the feeding box 61. The side of the discharge gate 65 is rotatably connected to the gate shaft 66. A gate drive box 67 is provided on the side of the feeding box 61. A gate drive cylinder 68 is provided inside the gate drive box 67. The bottom of the gate drive cylinder 68 is rotatably connected to the inner wall of the gate shaft 66. A gate swing arm 69 is provided at the end of the piston rod of the gate drive cylinder 68. The gate swing arm 69 is a two-link structure. The end of the gate swing arm 69 away from the gate drive cylinder 68 is rotatably connected to the end of the gate shaft 66. The gate drive cylinder 68 drives the gate shaft 66 to reciprocate, and the gate shaft 66 drives the discharge gate 65 to reciprocate.

[0031] like Figure 2 and Figure 3 As shown, the top of the main frame 5 is provided with a transition flexible sleeve 51 connected to the bottom of the feeding box 61. The bottom of the transition flexible sleeve 51 is provided with a feeding hopper 52. The feeding hopper 52 is a bucket-shaped structure with a gradually decreasing cross-sectional area. The bottom of the feeding hopper 52 is provided with a feeding port 53, and the end of the feeding port 53 has a flexible block. The side of the feeding hopper 52 is provided with an exhaust port 54. The inside of the feeding hopper 52 is provided with an exhaust chamber 55 communicating with the discharge port. The exhaust chamber 55 is a thin-walled structure separated from the internal cavity of the feeding hopper 52. The exhaust chamber 55 extends downward into the feeding port 53. The side of the feeding hopper 52 is provided with a vibrator 56.

[0032] like Figure 2 and Figure 3As shown, the main frame 5 is equipped with a lifting assembly, which includes a bottle support platform 57 and a lifting cylinder 59. The bottle support platform 57 is equipped with a pair of bottle limiting plates 571. One end of the bottle limiting plate 571 is equipped with a bottle positioning sensor 58. The lifting cylinder 59 is respectively located on the outer side of the bottle limiting plates 571 on both sides. The lifting cylinder 59 is installed on the inner side of the main frame 5. The bottom of the lifting cylinder 59 is fixed. The piston rod of the lifting cylinder 59 is set downward. The end of the piston rod of the lifting cylinder 59 is connected to the bottle support platform 57.

[0033] like Figure 2 and Figure 3 As shown, the second frame 12 is provided with a residual material control cylinder 73 on the side of the main frame 5. The piston rod of the residual material control cylinder 73 is provided with a residual material box 74. When the piston rod of the residual material control cylinder 73 extends, the residual material box 74 moves to below the discharge port 53 to block the opening of the bottle body 22. When the piston rod of the residual material control cylinder 73 retracts, the residual material box 74 moves away to expose the opening of the bottle body 22.

[0034] like Figure 2 and Figure 3 As shown, the weighing assembly includes a weighing sensor 71 disposed below the bottom plate of the main frame 5, the bottom of the weighing sensor 71 is disposed on the top plate of the second frame 12, and anti-collision blocks 72 are provided on both sides of the weighing sensor 71 on the bottom plate of the main frame 5.

[0035] like Figure 7 As shown, the pushing mechanism includes a pushing cylinder 3 and a pushing plate 31, and the pushing mechanism includes a pushing cylinder 4 and a pushing plate 41. The piston rods of both the pushing cylinder 3 and the pushing cylinder 4 are positioned towards the central bottle conveyor line 2, and the pushing cylinder 3 and the pushing cylinder 4 are at the same height. A limiting cylinder 8 is provided on the side of the pushing assembly, and a limiting baffle 81 is provided at the end of the piston rod of the limiting cylinder 8. Continuous bottle holders 21 are provided on the bottle conveyor line 2, and a space for accommodating the bottle body 22 is formed between two adjacent bottle holders 21.

[0036] Specific implementation process: The limiting baffle 81 is in the pushed-out state before the bottle is loaded. After the bottle holder 21 is moved into place by the conveyor belt, it is precisely positioned by the limiting baffle 81. Then the pushing component pushes a bottle body 22 on the bottle holder 21 into the bottle support platform 57 below the discharge port 53.

[0037] After the bottle positioning sensor 58 detects that the bottle body 22 is in place, the lifting cylinders 59 on both sides of the lifting assembly work simultaneously to lift the bottle support platform 57 supporting the bottle body 22 upwards. The discharge port 53 has a flexible block, and the bottle body 22 is lifted and connected to the discharge port 53 to achieve a seal. The gate drive cylinder 68 is inflated, and the connected gate swing arm 69 drives the discharge gate 65 to open and perform the discharge action. During the discharge process, the exhaust structure of the discharge port 53 can continuously exhaust air to balance the internal and external pressure.

[0038] The feeding hopper 52 is made entirely of SUS316L stainless steel with a mirror-polished finish. Its relatively large tilt angle, combined with the vibrator 56 on the side wall of the feeding hopper 52, vibrates at a specific frequency during feeding, effectively preventing material accumulation inside the feeding port 53. A bottom weighing sensor 71 measures the overall weight of the feeding hopper 52 and the material bottle. The feeding box 61 is connected to the feeding hopper 52 via a flexible sleeve and is not involved in quality verification. Anti-collision blocks 72 on both sides of the bottom prevent the equipment from falling and provide support during equipment maintenance.

[0039] When the weighing sensor 71 detects that the weight is about to reach the required level, the upper discharge gate 65 closes. The lead time is precisely calculated by the system so that after the gate closes, the material continuing to fall from the hopper 52 completely enters the bottle body 22, just enough to meet the requirement. At this time, the lifting component descends, the bottle body 22 resets, and then the ejection component pushes the bottle body 22 back to the bottle holder 21 for the next bottle to be filled.

[0040] The residual material box 74 between the discharge port 53 and the bottle body 22 remains extended before the bottle body 22 is lifted into position and after the bottle body 22 has finished loading and descended, to prevent residual material from slipping and causing material leakage.

[0041] The present invention provides a sealed feeding and weighing device for hazardous chemicals. The bottle body 22 is moved up and down by a pushing component and a pushing component. The lifting component lifts the bottle body 22. After the bottle mouth of the bottle body 22 and the discharge port 53 form a seal, the material is discharged by the discharge gate 65. The weighing component weighs simultaneously. The residual material box 74 is set between the bottle mouth and the discharge port 53 of the bottle body 22 to prevent material leakage between the upper and lower bottles. The overall structure is compact, highly automated, safe and dust-free.

[0042] The above-described specific embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications, substitutions, and improvements made by those skilled in the art to the technical solutions of the present invention based on the provided textual description and drawings, without departing from the design concept and spirit of the present invention, should all fall within the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. A sealed feeding and weighing device suitable for hazardous chemicals, characterized in that, The system includes a frame and a bottle conveyor line (2). The bottle conveyor line (2) is located in the middle of the frame. The bottle conveyor line (2) is used to transfer the bottle body (22). The frame is provided with a feeding and weighing mechanism for accurately feeding hazardous chemicals into the bottle body (22) and weighing it. The frame is provided with a pushing mechanism for pushing the bottle body (22) below the feeding and weighing mechanism. The frame is provided with a pushing mechanism for pushing the bottle body (22) back into the bottle conveyor line (2).

2. The sealed feeding and weighing device for hazardous chemicals according to claim 1, characterized in that, The frame includes a first frame (11) and a second frame (12), which are respectively arranged on both sides of the bottle production line (2). The pushing mechanism is arranged on the first frame (11), and the pushing mechanism is arranged on the second frame (12). The pushing mechanism and the pushing mechanism are at the same height. The feeding and weighing mechanism is arranged above the second frame (12), and the projection of the feeding and weighing mechanism is located between the pushing mechanism and the pushing mechanism.

3. A sealed feeding and weighing device for hazardous chemicals according to claim 2, characterized in that, The feeding and weighing mechanism includes a main frame (5), a feeding component and a weighing component. The feeding component is located on the top of the main frame (5), and the weighing component is located inside the main frame (5). The feeding component includes a feeding box (61). The feeding box (61) is provided with a feeding pipe (62). The feeding pipe (62) is a square tube structure. The top of the feeding pipe (62) passes through the top of the feeding box (61) and bends to one side. The top of the feeding pipe (62) is provided with a feeding port (63). The bottom of the feeding pipe (62) is set as an arc-shaped discharge port (64). The discharge port (64) is provided with a discharge gate (65). The bottom of the discharge gate (65) is an arc shape adapted to the discharge port (64).

4. A sealed feeding and weighing device for hazardous chemicals according to claim 3, characterized in that, The feeding box (61) is provided with a gate shaft (66), and the side of the discharge gate (65) is rotatably connected to the gate shaft (66). The side of the feeding box (61) is provided with a gate drive box (67), and the gate drive box (67) is provided with a gate drive cylinder (68). The bottom of the gate drive cylinder (68) is rotatably connected to the inner wall of the gate shaft (66). The end of the piston rod of the gate drive cylinder (68) is provided with a gate swing arm (69). The gate swing arm (69) is a two-link structure. The end of the gate swing arm (69) away from the gate drive cylinder (68) is rotatably connected to the end of the gate shaft (66). The gate drive cylinder (68) drives the gate shaft (66) to reciprocate, and the gate shaft (66) drives the discharge gate (65) to reciprocate.

5. A sealed feeding and weighing device for hazardous chemicals according to claim 4, characterized in that, The top of the main frame (5) is provided with a transition flexible sleeve (51) connected to the bottom of the feeding box (61). The bottom of the transition flexible sleeve (51) is provided with a feeding hopper (52). The feeding hopper (52) is a bucket-shaped structure with a gradually decreasing cross-sectional area. The bottom of the feeding hopper (52) is provided with a feeding port (53). The end of the feeding port (53) has a flexible block. The side of the feeding hopper (52) is provided with an exhaust port (54). The inside of the feeding hopper (52) is provided with an exhaust chamber (55) communicating with the discharge port. The exhaust chamber (55) is a thin-walled structure separated from the internal cavity of the feeding hopper (52). The exhaust chamber (55) extends downward into the feeding port (53). The side of the feeding hopper (52) is provided with a vibrator (56).

6. A sealed feeding and weighing device for hazardous chemicals according to claim 5, characterized in that, The main frame (5) is provided with a lifting assembly, which includes a bottle support platform (57) and a lifting cylinder (59). The bottle support platform (57) is provided with a pair of bottle limiting plates (571). One end of the bottle limiting plate (571) is provided with a bottle positioning sensor (58). The lifting cylinder (59) is respectively located on the outside of the bottle limiting plates (571) on both sides. The lifting cylinder (59) is installed on the inside of the main frame (5). The bottom of the lifting cylinder (59) is fixed. The piston rod of the lifting cylinder (59) is set downward. The end of the piston rod of the lifting cylinder (59) is connected to the bottle support platform (57).

7. A sealed feeding and weighing device for hazardous chemicals according to claim 5, characterized in that, The second frame (12) is provided with a residual material control cylinder (73) on the side of the main frame (5). The piston rod of the residual material control cylinder (73) is provided with a residual material box (74). When the piston rod of the residual material control cylinder (73) extends, the residual material box (74) moves to the bottom of the discharge port (53) to block the opening of the bottle body (22). When the piston rod of the residual material control cylinder (73) retracts, the residual material box (74) moves away to expose the opening of the bottle body (22).

8. A sealed feeding and weighing device for hazardous chemicals according to claim 3, characterized in that, The weighing assembly includes a weighing sensor (71) disposed below the bottom plate of the main frame (5), the bottom of the weighing sensor (71) is disposed on the top plate of the second frame (12), and anti-collision blocks (72) are provided on both sides of the weighing sensor (71) on the bottom plate of the main frame (5).

9. A sealed feeding and weighing device for hazardous chemicals according to claim 2, characterized in that, The pushing mechanism includes a pushing cylinder (3) and a pushing plate (31), and the pushing mechanism includes a pushing cylinder (4) and a pushing plate (41). The piston rods of the pushing cylinder (3) and the pushing cylinder (4) are both set towards the middle material bottle production line (2). The pushing cylinder (3) and the pushing cylinder (4) are at the same height.

10. A sealed feeding and weighing device for hazardous chemicals according to claim 9, characterized in that, The side of the ejection assembly is provided with a limiting cylinder (8), and the end of the piston rod of the limiting cylinder (8) is provided with a limiting baffle (81). The bottle production line (2) is provided with continuous bottle holders (21), and a space for accommodating the bottle body (22) is formed between two adjacent bottle holders (21).

Images