A small material configuration device with accurate discharging
By coordinating the design of the spiral blades and the weighing device, the problems of agglomeration and dust generation during powder feeding are solved, achieving stable powder conveying and accurate weighing, improving the accuracy and efficiency of feeding, and reducing material waste.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIUMSUN RUBBER TIRE WEIHAI
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-07
AI Technical Summary
In existing technologies, powdered chemicals are prone to clumping during the feeding process in the rubber industry, leading to poor feeding and dust generation during the arch breaking process, which reduces weighing accuracy and efficiency.
By employing a coordinated design of spiral blades and weighing devices, and through the variable pitch design of the spiral blades and the precise control of the weighing devices, stable conveying and accurate weighing of powder are achieved, avoiding powder agglomeration and dust generation.
It improves the accuracy and efficiency of powder feeding, reduces dust emissions, avoids material waste, and ensures the accuracy and stability of weighing.
Smart Images
Figure CN224465009U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material feeding device technology, and in particular to a small material configuration device that can accurately feed materials. Background Technology
[0002] In the rubber industry, the weighing of minor components is a crucial step in the tire mixing process. During mixing, coarse and fine chemicals, prepared according to specified weight requirements, are mixed with the rubber compound. These coarse and fine chemicals contain various powdered chemicals.
[0003] The rubber industry commonly uses a vibrating screen at the bottom of the silo for material feeding and weighing. However, for powdery materials, especially in high humidity conditions, the powder tends to clump and arch, causing bridging and hindering feeding. Current methods rely on bridging hammers to break up these bridging blocks, but this results in excessive vibration, generating significant dust and wasting material. Furthermore, excessive vibration exacerbates weighing fluctuations and reduces weighing accuracy. Utility Model Content
[0004] The purpose of this invention is to provide a small material feeding device that can accurately feed materials. Through the coordinated design of the spiral blades and the weighing device, it can achieve stable material conveying and accurate weighing, reduce dust emissions, and avoid material waste.
[0005] To achieve the above objectives, this utility model provides a small material preparation device for precise material feeding, including a hopper, a feeding structure installed inside the hopper, and a weighing device located at the bottom of the hopper; the top of the hopper has a feed inlet, and the bottom has a discharge outlet, with a downwardly extending discharge pipe fixed to the bottom of the discharge outlet; the weighing device is located at the bottom of the discharge outlet; the feeding structure includes a screw, helical blades fixed circumferentially on the screw, and a drive device for driving the screw to rotate; the screw is vertically rotatably mounted on the hopper cover, with its top protruding from the hopper cover and connected to the drive device, and its bottom inserted into the discharge pipe; the bottom end of the screw inserted into the discharge pipe is fixed with helical blades, and the upper part of the helical blades is inserted into the hopper; the helical blades are clearance-fitted with the side wall of the discharge outlet, and the pitch of the helical blades is variable.
[0006] By adopting the above structure, and by setting up a hopper, a feeding structure, and a weighing device, the storage, conveying, and accurate weighing of powder materials are achieved. The design of the hopper's inlet and outlet facilitates the input and output of powder materials, the feeding structure achieves stable conveying of powder materials through the cooperation of screws and spiral blades, and the weighing device ensures accurate weighing of powder materials, thereby improving the accuracy and efficiency of feeding.
[0007] Preferably, the spiral blades are divided into three sections from top to bottom, with different pitch ratios for each section. This design allows for flexible adjustment of the conveying speed of each section based on the flow characteristics of the powder and the feeding requirements, thereby optimizing the feeding process and improving the stability and accuracy of the feeding.
[0008] Preferably, the pitch ratio of the three sections from top to bottom is 1:3:1. This design can fully utilize the function of each section of the spiral blades. The small pitch in the upper section controls the amount of powder entering, the large pitch in the middle section increases the conveying speed, and the small pitch in the lower section precisely controls the amount of material discharged, thereby achieving more accurate material discharge.
[0009] Preferably, the screw has toothed protrusions in the circumferential direction. This enhances the crushing ability of the powder, prevents bridging during conveying, and ensures smooth powder transport.
[0010] Preferably, the top of the upper spiral blades extends upwards into the hopper. This breaks the arch structure formed by the powder above the discharge port, allowing the powder to enter the discharge pipe smoothly and avoiding the problem of poor material flow caused by powder bridging.
[0011] Preferably, the upper section of the spiral blades includes a stirring blade inserted into the hopper and a discharging blade inserted into the discharge pipe, wherein the cross-section of the stirring blade gradually decreases from top to bottom until it is the same as the cross-section of the discharging blade; the stirring blades form a spiral conical structure. This design can increase the contact area between the spiral blades and the powder, enhance the stirring and pushing effect on the powder, reduce the accumulation and blockage of powder near the discharge port, and ensure the continuity and stability of the discharge.
[0012] Preferably, the bottom of the hopper is conical. This facilitates the concentration of powder towards the discharge port under gravity, improving the powder discharge efficiency.
[0013] Preferably, the weighing device includes a weighing platform and a weighing hopper mounted on the weighing platform with an open top. The weighing platform is used to weigh the weight of the weighing hopper; the upper opening of the weighing hopper faces the discharge port. This ensures that the powder falling from the discharge port can accurately fall into the weighing hopper, thereby achieving accurate weighing of the powder.
[0014] Preferably, the weighing device further includes a base, with a weighing platform hinged to the base. The weighing platform is connected to a rotary motor via a transmission structure, which drives the weighing platform to rotate, emptying the material from the weighing hopper. The transmission structure includes a cam rotatably mounted on the base and located at the bottom of the weighing platform. A tension spring is also provided between the base and the weighing platform, ensuring the bottom of the weighing platform remains pressed against the wheel surface of the cam. The cam's axle is connected to the rotary motor. The rotary motor drives the cam to rotate, causing the weighing platform to rotate and empty the powder from the weighing hopper. This design achieves automatic tilting and emptying of the weighing hopper, improving work efficiency.
[0015] Preferably, the weighing hopper includes a bottom wall parallel to the weighing platform, with the front end of the bottom wall extending out of the weighing platform; its rear end is an upwardly sloping arc-shaped wall, and the bottom wall and the arc-shaped wall together form a scoop-shaped weighing hopper. This design facilitates the collection and discharging of powder, reduces powder residue in the weighing hopper, and improves weighing accuracy.
[0016] After adopting the above technical solution, the beneficial effects of this utility model are:
[0017] This utility model, a small material feeding device for precise material feeding, solves the technical problems of easy clumping of small materials and dust generation caused by using a breaking hammer to break up bridging materials in existing technologies. This utility model, through the design of a hopper, feeding structure, and weighing device, achieves the storage, conveying, and precise weighing of powder materials. The hopper's inlet and outlet design facilitates the input and discharge of powder materials, the feeding structure achieves stable powder conveying through the cooperation of a screw and spiral blades, and the weighing device ensures precise weighing of the powder materials, thereby improving the accuracy and efficiency of feeding. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of a small material configuration device for precise material feeding according to this utility model;
[0019] Figure 2 This is a schematic diagram of the screw and helical blades in Embodiment 1;
[0020] Figure 3 This is a schematic diagram of the screw and helical blades in Embodiment 2;
[0021] Figure 4 This is a schematic diagram showing the position of the weighing hopper during the weighing process of the weighing device;
[0022] Figure 5 This is a schematic diagram of the position of the weighing hopper during the material pouring process of the weighing device.
[0023] In the diagram, 1 is the hopper, 11 is the feed inlet, 12 is the discharge outlet, 121 is the discharge pipe, 2 is the screw, 21 is the spiral blade, 211 is the upper section, 211a is the stirring blade, 211b is the feeding blade, 212 is the middle section, 213 is the lower section, 22 is the drive device, 23 is the toothed protrusion, 3 is the weighing device, 31 is the weighing platform, 311 is the weight sensor, 32 is the weighing hopper, 321 is the bottom wall, 322 is the arc-shaped wall, 33 is the base, 34 is the cam, and 35 is the tension spring. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings.
[0025] The orientations mentioned in this specification are based on the orientation of the small material configuration device for precise material feeding of this utility model when it is working normally. They do not limit the orientation during storage and transportation, and only represent relative positional relationships, not absolute positional relationships.
[0026] Example 1:
[0027] like Figure 1 As shown, a small material preparation device for precise material feeding includes a hopper 1, a feeding structure installed in the hopper 1, and a weighing device 3 set at the bottom of the hopper 1.
[0028] The top of the silo 1 is provided with a feed inlet 11 for feeding powder; the bottom is provided with a discharge outlet 12, and a downward-extending discharge pipe 121 is fixed to the bottom of the discharge outlet 12 for discharging powder. The bottom of the silo 1 is designed as a conical bottom, which is conducive to the powder concentrating towards the discharge outlet 12 under the action of gravity. A weighing device 3 is provided at the bottom of the discharge outlet 12.
[0029] The feeding structure includes a screw 2, helical blades 21 fixed around the circumference of the screw 2, and a drive device 22 for driving the screw 2 to rotate. The screw 2 is vertically mounted on the cover of the hopper 1, with its top protruding from the cover and connected to the drive device 22. The drive device 22 is a motor, fixed to the top of the hopper 1, and its drive shaft is connected to the screw 2. The bottom of the screw 2 is inserted into the discharge pipe 121, and the helical blades 21 are fixed at one end of the bottom of the screw 2 inserted into the discharge pipe 121. The helical blades 21 are clearance-fitted with the side wall of the discharge port 12. This design prevents powder from leaking through the gap between the helical blades 21 and the discharge port 12, improving the accuracy of feeding.
[0030] like Figure 2 As shown, the pitch of the helical blade 21 is variable. Specifically, the helical blade 21 is divided into three sections from top to bottom: the upper section 211, the middle section 212, and the lower section 213, with different pitch ratios for the three sections. In this embodiment, the preferred pitch ratio for the three sections from top to bottom is 1:3:1, but the pitch ratio can be adjusted as needed in practical applications.
[0031] The screw blades 21 of the upper section 211 have a relatively small pitch. In the initial stage when the powder enters the screw conveying area, the small pitch can better control the amount of powder entering. For powder, there may be uneven distribution in the hopper 1. The small pitch can gradually and stably introduce the powder into the discharge pipe 121, avoiding blockage or uneven discharge caused by a sudden large influx of powder, and ensuring a smooth and orderly start stage of powder conveying.
[0032] The spiral blades 21 in the middle section 212 have a larger pitch, which can significantly improve the conveying speed of the powder. After the powder has successfully entered the discharge pipe 121, the large pitch can quickly convey the powder downwards, reducing the residence time of the powder during the conveying process and improving the overall discharge efficiency. At the same time, the large pitch also facilitates the tumbling and mixing of the powder during the conveying process, making the powder move downwards more evenly.
[0033] The pitch of the spiral blades 21 in the lower section 213 decreases again. As the powder approaches the outlet of the discharge pipe 121, the small pitch allows for precise control of the powder feed rate. Since the powder is about to enter the weighing device 3 at this point, precise control of the feed rate is crucial for accurate weighing. The small pitch allows for slow and stable powder output, avoiding inaccurate weighing due to excessive feed speed and ensuring that the weight of each feed meets the set requirements.
[0034] Inside the hopper 1, powder tends to form an arch structure above the discharge port 12, preventing the powder from falling smoothly. To solve this problem, the top part of the spiral blade 21 of the upper section 211 extends upward into the hopper 1, with the length extending into the hopper 1 accounting for 2 / 3 of the total length of the upper section 211. The rotational motion of the spiral blade 21 breaks up the arch structure formed by the powder, allowing the powder to enter the discharge pipe 121 smoothly, avoiding the problem of poor material flow caused by powder bridging.
[0035] Furthermore, the screw 2 is provided with toothed protrusions 23 in the circumferential direction. The toothed protrusions 23 enhance the crushing capacity of the powder and prevent bridging.
[0036] like Figure 1 , Figure 4 and Figure 5 As shown, the weighing device 3 includes a weighing platform 31 and a weighing hopper 32 mounted on the weighing platform 31 with an open top. A weight sensor 311 is installed on the weighing platform 31, which is used to weigh the weight of the weighing hopper 32. The upper opening of the weighing hopper 32 is directly opposite the discharge port 12, ensuring that the powder falling from the discharge port 12 can accurately fall into the weighing hopper 32.
[0037] Furthermore, the weighing device 3 also includes a base 33, and the bottom of the weighing platform 31 is hinged to the base 33; the weighing platform 31 is connected to a rotary motor (not shown in the figure) through a transmission structure, and the rotary motor drives the weighing platform 31 to rotate, pouring out the powder in the weighing hopper 32.
[0038] The transmission structure includes a cam 34 rotatably mounted on the base 33 and located at the bottom of the weighing platform 31; a tension spring 35 is also provided between the base 33 and the weighing platform 31, the tension spring 35 keeps the bottom of the weighing platform 31 against the wheel surface of the cam 34; the wheel axle of the cam 34 is connected to a rotary motor. When the rotary motor drives the cam 34 to rotate, the wheel surface of the cam 34 changes the angle between the weighing platform 31 and the base 33, thereby realizing the tilting and unloading of the weighing hopper 32.
[0039] The weighing hopper 32 includes a bottom wall 321 arranged parallel to the weighing platform 31, with the front end of the bottom wall 321 extending out of the weighing platform 31; its rear end is an upwardly sloping arc-shaped wall 322. The bottom wall 321 and the arc-shaped wall 322 form a scoop-shaped weighing hopper 32. The angle between the bottom wall 321 and the arc-shaped wall 322 is 110°-135°. This scoop-shaped weighing hopper 32 design facilitates the collection and pouring of powder, reducing powder residue in the weighing hopper 32.
[0040] Compared with vibrating screen weighing and feeding devices, this device vibrates less during operation, which can effectively reduce dust generation and reduce material waste.
[0041] like Figure 1 As shown, the working process of the small material preparation device for precise material feeding according to this utility model is as follows:
[0042] Powder is fed into silo 1 through the feed inlet 11 at the top of silo 1. The drive unit 22 is started, driving the screw 2 to rotate, and the spiral blades 21 rotate accordingly, conveying the powder from silo 1 to the discharge outlet 12, where it falls into the weighing hopper 32. Due to the variable pitch design of the spiral blades 21, precise feeding can be achieved according to the flow characteristics of the powder. The weighing platform 31 weighs the powder in the weighing hopper 32 in real time. When the set weight is reached, the drive unit 22 is stopped, completing the feeding process. The rotary motor is started, driving the cam 34 to rotate, causing the weighing platform 31 to rotate and empty the powder from the weighing hopper 32, completing one powder preparation process.
[0043] Example 2:
[0044] like Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that the cross-sectional size of the helical blade 21 in the upper section 211 is different.
[0045] In this embodiment, the spiral blades of the upper section 211 include a stirring blade 211a inserted into the hopper 1 and a discharging blade 211b inserted into the discharge pipe 121. The cross-section of the stirring blade 211a gradually decreases from top to bottom until it is the same as the cross-section of the discharging blade 211b. The stirring blades 211a form a spiral conical structure. This design can increase the contact area between the spiral blades 21 and the powder, improve the stirring and pushing effect on the powder, reduce the accumulation and blockage of powder near the discharge port 12, and ensure the continuity and stability of the discharge.
[0046] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.
Claims
1. A small material preparation device for precise material feeding, characterized in that: It includes a hopper, a feeding structure installed inside the hopper, and a weighing device located at the bottom of the hopper; The silo has a feed inlet at the top and a discharge outlet at the bottom, with a downward-extending discharge pipe fixed to the bottom of the discharge outlet; the weighing device is installed at the bottom of the discharge outlet. The feeding structure includes a screw, helical blades fixed in the circumferential direction of the screw, and a drive device for driving the screw to rotate. The screw is vertically and rotatably mounted on the hopper cover, with its top protruding from the hopper cover and connected to the drive device, and its bottom inserted into the discharge pipe; the bottom end of the screw inserted into the discharge pipe is fixed with the helical blade; the upper part of the helical blade is inserted into the hopper; the helical blade is clearance-fitted with the side wall of the discharge port, and the pitch of the helical blade is variable.
2. The small material preparation device for precise material feeding according to claim 1, characterized in that: The helical blade is divided into three sections from top to bottom, and the pitch ratio of the three sections is different.
3. The small material preparation device for precise material feeding according to claim 2, characterized in that: The pitch ratio of the three sections from top to bottom is 1:3:
1.
4. The small material preparation device for precise material feeding according to claim 1, characterized in that: The screw has toothed protrusions in its circumferential direction.
5. The small material preparation device for precise material feeding according to claim 3, characterized in that: The top of the upper section of the spiral blade extends upward into the interior of the hopper.
6. The small material preparation device for precise material feeding according to claim 5, characterized in that: The upper section of the spiral blades includes a stirring blade inserted into the hopper and a discharging blade inserted into the discharge pipe, wherein the cross-section of the stirring blade gradually decreases from top to bottom until it is the same as the cross-section of the discharging blade; The stirring blades are arranged in a spiral conical structure.
7. The small material preparation device for precise material feeding according to claim 1, characterized in that: The bottom of the silo is conical.
8. The small material preparation device for precise material feeding according to claim 1, characterized in that: The weighing device includes a weighing platform and a weighing hopper mounted on the weighing platform with an open top. The weighing platform is used to weigh the weight of the weighing hopper. The upper opening of the weighing hopper is directly opposite the discharge port.
9. A small material preparation device for precise material feeding according to claim 8, characterized in that: The weighing device further includes a base, and the weighing platform is hinged to the base; the weighing platform is connected to a rotary motor through a transmission structure, and the rotary motor drives the weighing platform to rotate, pouring out the material in the weighing hopper; the transmission structure includes a cam rotatably mounted on the base and located at the bottom of the weighing platform; a tension spring is also provided between the base and the weighing platform, and the tension spring keeps the bottom of the weighing platform against the wheel surface of the cam; the wheel axle of the cam is driven to the rotary motor.
10. A small material preparation device for precise material feeding according to claim 9, characterized in that: The weighing hopper includes a bottom wall that is parallel to the weighing platform, and the front end of the bottom wall extends out of the weighing platform; Its rear end is an upward-sloping arc-shaped wall, and the bottom wall and the arc-shaped wall form a scoop-shaped weighing hopper.