A double-feed screw conveyor for weighing

Abstract

The utility model discloses a double feeding auger for weighing relates to feeding weighing technical field, including big auger and micro short auger, and the outer diameter and length of big auger are all greater than the outer diameter and length of micro short auger, and micro short auger is located below the discharge end of big auger, and big auger and micro short auger are located in big auger casing and micro short auger casing respectively, and are respectively transmission connection big auger drive part and micro short auger drive part, the inlet is provided with the feed inlet in big auger casing feed end, and micro short auger casing is located below the discharge end of big auger casing, and micro short auger casing is communicated with big auger casing discharge end through the blanking storage cavity, and big auger observation window and micro short auger observation window are respectively provided on the sidewall of feed inlet and blanking storage cavity. In the early stage of feeding weighing, utilize big auger and micro short auger two augers to carry out big, medium feeding simultaneously, in the later stage of feeding weighing, utilize micro short auger to carry out trace fine adjustment, make the material of weighing reach very high precision.

Description

Technical Field

[0001] This utility model relates to the field of feeding and weighing technology, and more specifically to a double feeding auger for weighing. Background Technology

[0002] In industries such as fine chemicals, feed, fertilizers, and food, large quantities of bulk materials need to be repackaged into bags of a fixed weight. This process is called quantitative metering packaging. Specifically, the material is conveyed to a weighing mechanism and weighed simultaneously. When the weighing weight reaches the required weight, the conveying mechanism is shut off, and the weighed material is then packaged.

[0003] In the prior art, patent CN203740149U discloses a double-helix quantitative feeding device, belonging to the field of metering equipment. This device includes two sets of augers, each set housed within a corresponding auger housing. The input ends of the two sets of augers extend beyond the auger housings and are connected to a transmission device. The device is characterized by: the ends of the auger housings being connected via a discharge pipe, with the discharge pipe extending to the lowermost auger housing corresponding to the metering hopper; a hopper located at the upper left end of the uppermost auger housing; and the uppermost and lowermost auger housings being connected via a trough pipe. This device controls the feeding speed through mechanical components, preventing clogging of the auger housings. Furthermore, the device has a simple and reasonable structure and significant market potential.

[0004] The aforementioned patent discloses a double-helix quantitative feeding device that uses large and small augers for material conveying, but it has the following problems: 1. The lower auger is located below the upper auger, and the two are connected by a central chute. The diameter of the upper auger is larger than that of the lower auger, while the lengths of the two augers are roughly the same. The upper auger is used for coarse adjustment of material conveying, and the lower auger is used for fine adjustment. However, if the lower auger is too long for fine adjustment, and its length is not significantly different from that of the upper auger, the shaft of the lower auger will be impossible to machine. For example, if the outer diameter of the small auger shell is less than 90 mm, the shell wall thickness is 4 mm, and the clearance between the auger shell and the auger on one side is 2 mm (totaling 4 mm), then the diameter of the small auger is 78 mm. The maximum diameter of the small auger shaft is 25 mm. The maximum machining length for a 25 mm diameter shaft is approximately 80 mm; any longer and it cannot be machined.

[0005] 2. During feeding, it is impossible to know the amount of material in the hopper and trough from the front. When there is no material in the hopper, it will cause the subsequent feeding and weighing to stop. The hopper will need to be filled before feeding and weighing can be resumed, which will reduce the feeding and weighing efficiency. Utility Model Content

[0006] In order to overcome the defects in the prior art, this utility model discloses a double-feeding auger for weighing. The purpose of this utility model is to solve the problems in the prior art where the length of the finely adjusted lower auger is too long and not much different from the length of the upper auger, which makes the shaft of the lower auger too small and long to be difficult to process, and the inability to know the amount of material in the hopper and trough from the front.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A dual-feed auger for weighing includes a large auger and a miniature short auger, wherein the outer diameter and length of the large auger are both greater than the outer diameter and length of the miniature short auger, and the miniature short auger is located below the discharge end of the large auger. The large auger and the miniature short auger are located inside the large auger housing and the miniature short auger housing, respectively, and are respectively connected to the large auger drive unit and the miniature short auger drive unit. The large auger housing has a feed inlet at its feed end, and the miniature short auger housing is located below the discharge end of the large auger housing. The miniature short auger housing is connected to the discharge end of the large auger housing through a material storage cavity. The feed inlet and the material storage cavity are respectively provided with observation windows for the large auger and the miniature short auger.

[0008] Preferably, the large auger includes a large auger shaft and large auger spiral blades on the large auger shaft, and the micro short auger includes a micro short auger shaft and micro short auger spiral blades on the micro short auger shaft.

[0009] Preferably, both ends of the large auger shaft are mounted on the large auger housing via bearings; the miniature short auger shaft extends outward from the miniature short auger housing, and the miniature short auger shaft is partially cantilevered inside the miniature short auger housing. One end of the outward-extending portion of the miniature short auger shaft is mounted on the miniature short auger housing via a first bearing, and the other end is mounted on a support member via a second bearing. The support member is fixedly mounted on the large auger housing, and the outward-extending portion of the miniature short auger shaft is connected to the miniature short auger drive member for transmission. The first bearing is mounted on a first bearing housing, which is mounted on a miniature short auger housing; the second bearing is mounted on a second bearing housing, which is mounted on a support member.

[0010] Preferably, both the large auger drive component and the miniature short auger drive component are fixedly mounted on the large auger housing and are respectively driven connected to the large auger shaft and the miniature short auger shaft via the large auger timing belt and the miniature short auger timing belt.

[0011] Preferably, both the large auger shell and the micro short auger shell are provided with several horizontally welded grids at their discharge ports, with a gap of 15-20mm between adjacent grids, and the grids are made of 1-1.5mm thick steel plates.

[0012] Preferably, both the large auger drive and the miniature short auger drive are located below the large auger housing.

[0013] Preferably, the large auger, the miniature short auger, the large auger shell, and the miniature short auger shell are all horizontally arranged and parallel to each other, and the inner diameter of the miniature short auger shell is 40-90mm.

[0014] Preferably, the discharge ports of both the large auger housing and the miniature short auger housing are connected to the discharge cylinder. The discharge cylinder is equipped with a discharge port sealing door inside and a sealing door drive component is provided at the top. The sealing door drive component drives the discharge port sealing door to open or close the discharge ports of the large auger housing and the miniature short auger housing.

[0015] Preferably, the sealing door drive is a linear drive, which drives the discharge port sealing door to open or close the discharge ports of the large auger housing and the micro short auger housing via a crank-slider mechanism.

[0016] Preferably, the feed inlet is equipped with a feed hopper.

[0017] The beneficial effects of this utility model are: This utility model provides a dual-feeding auger for weighing. A large auger handles large-volume feeding and weighing, while a miniature short auger handles small-volume feeding and weighing. At the start of feeding and weighing, the large auger transports material from its shell to its outlet for weighing. Simultaneously, the large auger transports material from its shell through a storage chamber to the miniature short auger's shell, and the miniature short auger transports material from its shell to its outlet for weighing. In the early stages of feeding and weighing, both augers are used for large-volume feeding and weighing, allowing the material to quickly reach the required weight for coarse adjustment. In the later stages, the large auger is shut off, and the miniature short auger is used to transport material from the storage chamber and shell to the outlet for weighing. The miniature short auger provides a smaller feed rate, allowing for fine-tuning of the material feeding and weighing, resulting in high accuracy.

[0018] The dual-feeding auger for weighing provided by this utility model has a miniature short auger and a miniature short auger housing located below the discharge end of the large auger and the large auger housing. In the later stage of feeding and weighing, the miniature short auger is used to feed and weigh the material in the material storage chamber and the miniature short auger housing to finely adjust the feeding amount. Compared with the prior art where the length of the lower auger is too long and not much different from the length of the upper auger, which would make the shaft of the lower auger small and long and difficult to process, the miniature short auger and the miniature short auger housing of this utility model are located below the discharge end of the large auger, with a shorter length and can also achieve fine adjustment. Although the shaft of the lower auger is small, its length is shorter, which can meet the processing requirements.

[0019] This utility model provides a dual-feeding auger for weighing, with a large auger observation window and a miniature short auger observation window respectively installed on the side wall of the inlet and the discharge storage chamber. The large auger observation window can be used to observe whether there is material in the inlet. If there is no material, material is added immediately to prevent the weighing process from stopping due to lack of material. The miniature short auger observation window can be used to observe whether there is material in the discharge storage chamber. When there is no material in the discharge storage chamber and it is in the fine-tuning stage, the outlets of the large auger and the miniature short auger can be closed first, and the large auger can be used to feed material into the discharge storage chamber. Then the outlet can be opened, and the miniature short auger can be used for fine-tuning.

[0020] The dual-feeding auger for weighing provided by this utility model has a low outer diameter for miniature short augers, so it is best to have no obstructions in its conveying path. This utility model extends the miniature short auger shaft outward and uses a support member to support it, so that the part of the miniature short auger shaft located inside the miniature short auger shell is suspended without support, so as to prevent the internal support from interfering with the material conveying. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the dual-feed auger for weighing according to this utility model; Figure 2 This is a schematic diagram of the dual-feed auger structure for weighing according to this utility model; Figure 3 This is a schematic diagram of a double-feeding auger for weighing, equipped with a discharge cylinder and a feed hopper. Figure label: 1. Large auger; 2. Miniature short auger; 3. Large auger housing; 4. Miniature short auger housing; 5. Large auger drive unit; 6. Miniature short auger drive unit; 7. Feed inlet; 8. Discharge storage chamber; 9. Large auger observation window; 10. Miniature short auger observation window; 11. Large auger shaft; 12. Large auger spiral blade; 13. Miniature short auger shaft; 14. Miniature short auger spiral blade; 15. Support component; 16. Large auger synchronous belt; 17. Miniature short auger synchronous belt; 18. Barrier; 19. Discharge cylinder; 20. Discharge port sealing door; 21. Sealing door drive unit; 22. Feed hopper; 23. First bearing seat; 24. Second bearing seat. Detailed Implementation

[0022] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model.

[0023] A type of weighing double-feed auger, such as Figures 1-3 As shown, it includes a large auger 1 and a micro short auger 2. The outer diameter and length of the large auger 1 are both larger than the outer diameter and length of the micro short auger 2, and the micro short auger 2 is located below the discharge end of the large auger 1. The large auger 1 and the miniature short auger 2 are located inside the large auger housing 3 and the miniature short auger housing 4, respectively, and are respectively connected to the large auger drive component 5 and the miniature short auger drive component 6. The large auger housing 3 is provided with a feed port 7 at the feed end, and the miniature short auger housing 4 is located below the discharge end of the large auger housing 3. The miniature short auger housing 4 is connected to the discharge end of the large auger housing 3 through the discharge storage cavity 8. The feed port 7 and the discharge storage cavity 8 are respectively provided with a large auger observation window 9 and a miniature short auger observation window 10 on their side walls.

[0024] In this embodiment, the large auger 1 is used for large-volume feeding and coarse weighing adjustment. The miniature short auger 2 is used for small-volume feeding and fine weighing adjustment. The large auger housing 3 and the miniature short auger housing 4 form the large auger feeding chamber and the miniature short auger feeding chamber, respectively. The large auger drive unit 5 and the miniature short auger drive unit 6 drive the large auger 1 and the miniature short auger 2 to rotate for feeding. The feed inlet 7 is used for feeding. The discharge storage chamber 8 is used to transport the material in the large auger housing 3 to the miniature short auger housing 4 for feeding by the miniature short auger 2, and also to store material. When the large auger 1 is closed and the miniature short auger 2 is used for fine weighing adjustment, the material stored in the discharge storage chamber 8 is transported to the rear end for fine weighing adjustment via the miniature short auger 2. The large auger observation window 9 and the miniature short auger observation window 10 are used to observe the material status in the feed inlet 7 and the discharge storage chamber 8, and to add material when needed.

[0025] This weighing system uses a dual-feed auger, suitable for weighing equipment with high precision requirements. Specifically, the smaller the diameter of the short, miniature auger cylinder, the higher the accuracy.

[0026] like Figure 1 As shown, the large auger 1 includes a large auger shaft 11 and large auger spiral blades 12 on the large auger shaft 11, and the miniature short auger 2 includes a miniature short auger shaft 13 and miniature short auger spiral blades 14 on the miniature short auger shaft 13. When the shaft rotates, the material is conveyed through the spiral blades on it.

[0027] like Figure 1 As shown, the two ends of the large auger shaft 11 are mounted on the large auger housing 3 via bearings; the miniature short auger shaft 13 extends outward from the miniature short auger housing 4, and the miniature short auger shaft 13 is partially cantilevered inside the miniature short auger housing 4. One end of the outward-extending part of the miniature short auger shaft 13 is mounted on the miniature short auger housing 4 via a first bearing, and the other end is mounted on the support member 15 via a second bearing. The support member 15 is fixedly mounted on the large auger housing 3, and the outward-extending part of the miniature short auger shaft 13 is connected to the miniature short auger drive member 6 for transmission. The first bearing is mounted on the first bearing housing 23, which is mounted on the miniature short auger housing 4. The second bearing is mounted on the second bearing housing 24, which is mounted on the support member 15. The front end of the miniature short auger is completely suspended. Because the outer diameter of the miniature short auger housing is less than 90mm, there is no space to install the bearing at the front end of the auger. Therefore, the miniature auger must be made both small and short so that its shaft can be effectively machined.

[0028] For shafts, bearings are typically installed at both ends and fixed by support members, thus providing support and allowing the shaft to rotate. For example, in this embodiment, the two ends of the large auger shaft 11 are mounted on the large auger housing 3 via bearings. The bearing support member at the left end forms an obstruction, which will affect the conveying efficiency of the large auger 1, but the impact is not significant because the outer diameter of the large auger 1 is relatively large, while the bearing support member is relatively small. For the miniature short auger 2, its outer diameter is smaller, and it is best to have no obstructions in its conveying path. Obstructions, such as bearing support members, are relatively large compared to the miniature short auger 2 and will obstruct its conveying, thus reducing its conveying efficiency.

[0029] In this embodiment, to reduce the impact of bearing supports on the conveying path of the miniature short auger 2, the portion of the miniature short auger shaft 13 located inside the miniature short auger housing 4 is specifically designed as a cantilever structure without bearing supports, thereby reducing the impact of obstructions on the conveying path of the miniature short auger 2. Specifically, the miniature short auger shaft 13 extends outward from the miniature short auger housing 4. One end of the outward-extending portion of the miniature short auger shaft 13 is mounted on the miniature short auger housing 4 via a first bearing, and the other end is mounted on a support member 15 via a second bearing. The support member 15 is fixedly mounted on the large auger housing 3, as shown below. Figure 1 As shown, the left end of the outward-extending portion of the miniature short auger shaft 13 is supported on the miniature short auger housing 4, and the right end is supported on the support member 15, so as to form a stable support structure to support the miniature short auger shaft 13 and make the miniature short auger shaft 13 suspended in the inner part of the miniature short auger housing 4.

[0030] like Figure 1 As shown, the large auger drive unit 5 and the miniature short auger drive unit 6 are both fixedly mounted on the large auger housing 3, and are respectively connected to the large auger shaft 11 and the miniature short auger shaft 13 via the large auger synchronous belt 16 and the miniature short auger synchronous belt 17, driving the large auger shaft 11 and the miniature short auger shaft 13 to rotate, and using the spiral blades on them to transport materials.

[0031] like Figure 1 and Figure 2As shown, several horizontally welded grids 18 are provided at the discharge ports of both the large auger shell 3 and the miniature short auger shell 4. The gap between adjacent grids 18 is 15-20mm. The grids 18 are made of 1-1.5mm thick steel plates. When the large auger 1 and the miniature short auger 2 are closed, the grids 18 block the material conveyed at the discharge port, so that the material falls into the feed cylinder as little as possible, which would affect the weighing accuracy.

[0032] like Figure 1 and Figure 2 As shown, both the large auger drive unit 5 and the miniature short auger drive unit 6 are located below the large auger housing 3. Compared to being installed on the left or right side of the large auger housing 3 and the miniature short auger housing 4, they utilize the space below the dual feeding augers and occupy less space on the left and right sides, making the dual feeding augers occupy less space.

[0033] like Figure 1 As shown, the large auger 1, the miniature short auger 2, the large auger shell 3, and the miniature short auger shell 4 are all horizontally arranged and parallel to each other. The inner diameter of the cylinder of the miniature short auger shell 4 is 40-90 mm, for example, 40 mm, 60 mm, 80 mm, and 90 mm.

[0034] like Figure 3 As shown, the discharge ports of the large auger housing 3 and the miniature short auger housing 4 are both connected to the discharge cylinder 19. The discharge cylinder 19 is equipped with a discharge port sealing door 20 and a sealing door drive component 21 at the top. The sealing door drive component 21 drives the discharge port sealing door 20 to open or close the discharge ports of the large auger housing 3 and the miniature short auger housing 4.

[0035] In this embodiment, the feeding cylinder 19 is used for feeding materials, and a weighing mechanism is installed below it, on which packaging bags are placed. The discharge port sealing door 20 is used to open or close the discharge ports of the large auger housing 3 and the miniature short auger housing 4, and the sealing door drive component 21 is used to drive the discharge port sealing door 20 to move. The material conveyed by the large auger 1 and the miniature short auger 2 enters the feeding cylinder 19 and then falls into the packaging bag on the weighing mechanism below. Simultaneously, the weighing mechanism weighs the material inside the packaging bag, achieving simultaneous conveying and weighing. After weighing is completed, the large auger 1 and the miniature short auger 2 are closed, and the packaging bag is then packaged. By providing the discharge port sealing door 20, when feeding is complete, the discharge ports of the two augers are closed respectively to prevent material overflow and affecting accuracy.

[0036] like Figure 3As shown, the sealing door drive component 21 is a linear drive component. The linear drive component drives the discharge port sealing door 20 to open or close the discharge ports of the large auger housing 3 and the miniature short auger housing 4 via a crank-slider mechanism. The linear drive component can be a linear motor, hydraulic cylinder, or other linear drive component. The linear drive component outputs linear reciprocating motion, which in turn drives the slider of the crank-slider mechanism to reciprocate linearly, thereby driving the rocker arm of the crank-slider mechanism to swing. The rocker arm swing drives the discharge port sealing door 20 to open or close the discharge ports of the large auger housing 3 and the miniature short auger housing 4.

[0037] like Figure 3 As shown, the feed inlet 7 is equipped with a feed hopper 22 for loading and weighing materials.

[0038] To better understand this utility model, the working principle of this utility model will be described in detail below: At the start of feeding and weighing, both the large auger 1 and the miniature short auger 2 begin operation to convey materials. Specifically, the large auger drive unit 5 and the miniature short auger drive unit 6 drive the large auger 1 and miniature short auger 2 to rotate and convey materials, respectively. Material in the feed hopper 22 enters the large auger housing 3 through the feed inlet 7. The large auger 1 conveys the material forward, and it enters the discharge cylinder 19 through the discharge outlet at the large auger housing 3. Simultaneously, when the material reaches the discharge outlet of the large auger housing 3, a portion of the material enters the discharge storage chamber 8 and then the miniature short auger housing 4. It is then conveyed forward by the miniature short auger 2 and enters the discharge cylinder 19 through the discharge outlet of the miniature short auger housing 4. The material then falls into the packaging bag on the weighing mechanism below. Simultaneously, the weighing mechanism weighs the material in the packaging bag, achieving simultaneous conveying and weighing. Large quantities of material are fed using both the large auger 1 and the miniature short auger 2.

[0039] When the weighing mechanism reaches the preset coarse adjustment value of the material inside the packaging bag, which is close to the target weighing value, the large auger 1 is shut off, leaving only the miniature short auger 2 feeding a small amount of material. The miniature short auger 2 conveys the material in the feeding storage chamber 8 forward to the feeding cylinder 19 and into the packaging bag. The miniature short auger 2 feeds a small amount of material. When the weighing mechanism reaches the preset fine adjustment value of the material inside the packaging bag, which is the target weighing value, the miniature short auger 2 is shut off, the weighing is completed, and the packaging bag is then packaged.

[0040] The embodiments of this utility model have been described in detail above, but this utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this utility model, and these equivalents or substitutions are all included within the scope defined by the claims of this utility model.

Claims

1. A double-feed auger for weighing, characterized in that, It includes a large auger (1) and a micro short auger (2), wherein the outer diameter and length of the large auger (1) are both greater than the outer diameter and length of the micro short auger (2), and the micro short auger (2) is located below the discharge end of the large auger (1); The large auger (1) and the miniature short auger (2) are located inside the large auger housing (3) and the miniature short auger housing (4) respectively, and are respectively connected to the large auger drive unit (5) and the miniature short auger drive unit (6); the large auger housing (3) is provided with a feed port (7) at the feed end, and the miniature short auger housing (4) is located below the discharge end of the large auger housing (3). The miniature short auger housing (4) is connected to the discharge end of the large auger housing (3) through the discharge storage cavity (8). The feed port (7) and the discharge storage cavity (8) are respectively provided with a large auger observation window (9) and a miniature short auger observation window (10) on their side walls. The large auger (1) includes a large auger shaft (11) and a large auger spiral blade (12) on the large auger shaft (11), and the micro short auger (2) includes a micro short auger shaft (13) and a micro short auger spiral blade (14) on the micro short auger shaft (13). The two ends of the large auger shaft (11) are mounted on the large auger housing (3) by bearings; the micro short auger shaft (13) extends outward from the micro short auger housing (4), and the micro short auger shaft (13) is located in the inner part of the micro short auger housing (4) and is cantilevered. One end of the outward-extending part of the micro short auger shaft (13) is mounted on the micro short auger housing (4) by the first bearing, and the other end is mounted on the support member (15) by the second bearing. The support member (15) is fixedly mounted on the large auger housing (3), and the outward-extending part of the micro short auger shaft (13) is connected to the micro short auger drive member (6) for transmission.

2. The dual-feed auger for weighing as described in claim 1, characterized in that, The first bearing is mounted on the first bearing housing (23), which is mounted on the miniature short auger housing (4); the second bearing is mounted on the second bearing housing (24), which is mounted on the support member (15).

3. A dual-feed auger for weighing as described in claim 1, characterized in that, The large auger drive unit (5) and the miniature short auger drive unit (6) are both fixedly mounted on the large auger housing (3) and are respectively driven and connected to the large auger shaft (11) and the miniature short auger shaft (13) via the large auger timing belt (16) and the miniature short auger timing belt (17).

4. A dual-feed auger for weighing as described in claim 1, characterized in that, The discharge ports of the large auger shell (3) and the micro short auger shell (4) are provided with several horizontally welded fences (18), the gap between adjacent fences (18) is 15-20mm, and the fences (18) are made of 1-1.5mm thick steel plates.

5. A dual-feed auger for weighing as described in claim 1, characterized in that, Both the large auger drive unit (5) and the miniature short auger drive unit (6) are located below the large auger housing (3).

6. A dual-feed auger for weighing as described in claim 1, characterized in that, The large auger (1), the miniature short auger (2), the large auger shell (3) and the miniature short auger shell (4) are all horizontally arranged and parallel to each other. The inner diameter of the cylinder of the miniature short auger shell (4) is 40-90mm.

7. A dual-feed auger for weighing as described in claim 1, characterized in that, The discharge ports of the large auger housing (3) and the micro short auger housing (4) are both connected to the discharge cylinder (19). The discharge cylinder (19) is provided with a discharge port sealing door (20) and a sealing door drive (21) on the top. The sealing door drive (21) drives the discharge port sealing door (20) to open or close the discharge ports of the large auger housing (3) and the micro short auger housing (4).

8. A dual-feed auger for weighing as described in claim 7, characterized in that, The sealing door drive (21) is a linear drive, which drives the discharge port sealing door (20) to open or close the discharge ports of the large auger housing (3) and the micro short auger housing (4) through a crank-slider mechanism.

9. A dual-feed auger for weighing as described in claim 1, characterized in that, The feed inlet (7) is equipped with a feed hopper (22).

Images