Powder feeding device

Abstract

The utility model relates to a powder feeding device which comprises a feeding hopper, the bottom end of the feeding hopper is fixedly connected with a discharging barrel with an opening in the bottom, the feeding hopper and the discharging barrel are coaxially arranged in a communicated mode, a shaft rod is arranged in the feeding hopper and vertically extends downwards into the discharging barrel, and a driving mechanism is arranged at the top of the feeding hopper. The driving mechanism is used for driving the shaft rod to rotate, stirring rods are evenly distributed on the part, located in the feeding hopper, of the shaft rod, and a material throwing disc is fixed to the end, located in the discharging barrel, of the shaft rod. The driving mechanism works to drive the shaft rod to rotate, the material throwing disc can be driven to rotate when the shaft rod rotates, under the action of centrifugal force, powder falling on the material throwing disc can be thrown away from the periphery of the material throwing disc, the powder can impact on the inner wall of the material discharging barrel, the caked powder can be scattered through impact, fragmentation is achieved, and the crushing efficiency is improved. The uniformity of later stirring and mixing is ensured, and the concrete stirring effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete processing, in particular to a powder feeding device. Background Art

[0002] Concrete is an engineering composite material in which aggregate is cemented into a whole by a cementing material. Usually, cement is used as the cementing material, sand, stone and other additive powders are used as aggregate, and they are mixed with water in a certain proportion and stirred to obtain cement concrete, which is widely used in civil engineering. When concrete is being stirred and processed, it is necessary to use a powder feeding device to put powder materials into the stirring equipment. Usually, the feeding device is a feed hopper.

[0003] Due to weather reasons, the powder may become wet, and the wet powder will agglomerate into lumps. When using the existing feeding device to feed each powder into the stirring device, it is difficult to crush the agglomerated powder, which easily affects the uniformity of the later concrete mixing. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a powder feeding device that can crush the agglomerated powder, effectively solving the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions.

[0006] A powder feeding device includes a feed hopper. The bottom end of the feed hopper is fixedly connected with a discharge cylinder body with an open bottom. The feed hopper and the discharge cylinder body are coaxially arranged and communicated. A shaft rod is arranged in the feed hopper. The shaft rod extends vertically downward into the discharge cylinder body. A driving mechanism is arranged at the top of the feed hopper. The driving mechanism is used to drive the shaft rod to rotate. Stirring rods are evenly distributed on the part of the shaft rod located in the feed hopper. A throwing disc is fixed at the end of the shaft rod located in the discharge cylinder body.

[0007] Thus, through the operation of the driving mechanism, the shaft rod is driven to rotate. When the shaft rod rotates, the stirring rods can be driven to swing in the feed hopper, so as to pre-stir the powders, ensure that the powders are pre-mixed evenly, improve the stirring effect and efficiency. The stirred powders in the feed hopper will vertically fall on the throwing disc in the discharge cylinder body. When the shaft rod rotates, the throwing disc can be driven to rotate at the same time. Under the action of centrifugal force, the throwing disc can throw the powders falling on it to the periphery. The powders will hit the inner wall of the discharge cylinder body, and the agglomerated powders can be scattered to achieve crushing, ensuring the uniformity of the later mixing and further improving the concrete stirring effect.

[0008] Furthermore, the inner diameter of the discharge cylinder body is larger than the inner diameter of the bottom end of the feed hopper. The diameter of the throwing disc is larger than the inner diameter of the bottom end of the feed hopper. There is a gap between the outer edge wall of the throwing disc and the inner wall of the discharge cylinder body.

[0009] The throwing plate can completely cover the lower port of the feed hopper, ensuring that the powder discharged into the discharge cylinder through the lower end of the feed hopper can fall on the throwing plate to be centrifugally accelerated and thrown out. There is a gap between the outer edge wall of the throwing plate and the inner wall of the discharge cylinder, which makes room for the powder to pass through, ensuring that the powder can fall normally through the gap between the outer edge wall of the throwing plate and the inner wall of the discharge cylinder.

[0010] Furthermore, the driving mechanism includes a stand, a cantilever, a mounting seat and a driving motor. The stand is vertically fixed on the top end surface of the feed hopper, the cantilever is horizontally fixed on the top of the stand, the top of the shaft is rotatably mounted on the lower surface of the cantilever, the driving motor is fixed to the cantilever through the mounting seat, and the output shaft of the driving motor passes through the cantilever and is fixedly connected to the top of the shaft.

[0011] By driving the motor, its output shaft can drive the shaft to rotate, thereby providing drive for the stirring of the stirring rod and the rotation of the throwing tray.

[0012] Furthermore, a number of baffle columns are fixed on the top wall of the discharge cylinder in a ring-shaped array around the shaft rod, and an annular groove is provided on the upper surface of the material-throwing plate around the shaft rod. An annular part is rotatably installed in the annular groove, and the bottom end of each baffle column is fixedly connected to the annular part, forming a throwing outlet on the top wall of the discharge cylinder, the upper surface of the material-throwing plate and between two adjacent baffle columns.

[0013] The baffle columns can be used to intercept larger powder lumps. As the throwing disc continues to rotate, the large powder lumps will continue to roll and collide with the baffle columns in the space above the throwing disc and surrounded by the baffle columns, forming small powder lumps to reduce the volume of the lumps. When the volume of the lumps is smaller than the size of the throwing outlet, they can pass through the throwing outlet and be thrown out onto the inner wall of the discharge cylinder, thereby continuing to crush the small powder lumps, thereby providing a double impact crushing effect, which can crush the large powder lumps step by step, further improving the crushing effect of the powder lumps.

[0014] Furthermore, a blocking disk is fixed on the shaft near the bottom end of the feed hopper, the outer peripheral wall of the blocking disk is rotatably fitted with the inner wall of the feed hopper, and a feeding port that passes through from top to bottom is provided at an eccentric position on the blocking disk.

[0015] The stirred powder is intercepted by the sealing disk and goes down into the discharge cylinder through the discharge port on the sealing disk. When the shaft rotates, the sealing disk is driven to rotate, so that the discharge port rotates eccentrically around the shaft, which can make the material evenly scattered on the throwing disk, avoiding excessive accumulation of powder in a certain place on the throwing disk and affecting the crushing effect.

[0016] Furthermore, a connecting arm is fixed to the side of the shaft rod, and a scraper is fixed on the connecting arm. The extended shape of the scraper is adapted to the shape of the feed hopper and is slidably fitted with the inner wall of the feed hopper.

[0017] When the shaft rotates, the fixed connection of the connecting arm can drive the scraper to rotate. The rotating scraper can scrape off the powder adhered to the inner wall of the feed hopper, preventing the powder from remaining in the feed hopper and facilitating the discharge of the powder in the feed hopper.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows.

[0019] 1. The present utility model works through the drive mechanism to drive the shaft to rotate. When the shaft rotates, it can drive the stirring rod to swing in the feed hopper, thereby pre-stirring each powder material, ensuring that each powder material is pre-mixed evenly, and improving the stirring effect and efficiency.

[0020] 2. When the shaft rotates, the present utility model can simultaneously drive the throwing disc to rotate. Under the action of centrifugal force, the throwing disc can throw the powder falling on it to the periphery. The powder will impact on the inner wall of the discharge cylinder, which can break up the agglomerated powder blocks, realize fragmentation, ensure the uniformity of later stirring and mixing, and further improve the concrete stirring effect.

[0021] 3. The present utility model uses the retaining post to intercept the powder blocks with a relatively large volume. As the throwing disc continues to rotate, the large-volume powder blocks continuously roll and collide with the retaining post in the space above the throwing disc and surrounded by the retaining post, forming small-volume powder blocks to reduce the block volume. When the block volume is smaller than the size of the discharge opening, it can pass through the discharge opening and be thrown onto the inner wall of the discharge cylinder, realizing the continuous crushing of the small-volume powder blocks, thereby providing two impact crushing effects, gradually crushing the large-volume powder blocks, and further improving the crushing effect on the powder blocks.

[0022] 4. When the shaft rotates, the present utility model drives the blocking disc to rotate, causing the feeding port to rotate eccentrically around the shaft, which can evenly scatter the material on the throwing disc, preventing the powder from accumulating excessively at a certain place on the throwing disc and affecting the fragmentation effect. The fixed connection of the connecting arm can drive the scraper to rotate. The rotating scraper can scrape off the powder adhered to the inner wall of the feed hopper, preventing the powder from remaining in the feed hopper and facilitating the discharge of the powder in the feed hopper.

[0023] 5. In the present utility model, by arranging the stirring rod, the throwing disc, the blocking disc and the scraper on the shaft, the rotation of each component shares the same drive source, eliminating the need to arrange multiple drive sources, reducing the equipment cost investment, and being beneficial to the miniaturization of the overall structure of the device, achieving two goals with one action. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present utility model;

[0025] Figure 2 is a schematic cross-sectional structure diagram of the present utility model;

[0026] Figure 3 is Figure 2 Schematic enlarged view of the structure at position A in

[0027] Figure 4 Partial structure sectional view of the present utility model.

[0028] In the figure: 01, discharge port; 1, feed hopper; 2, discharge cylinder; 21, retaining column; 3, shaft rod; 31, stirring rod; 32, throwing disc; 321, annular groove; 322, annular part; 33, sealing disc; 34, material discharge port; 35, connecting arm; 36, scraping blade; 4, driving mechanism; 41, vertical frame; 42, cantilever; 43, mounting seat; 44, driving motor. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figures 1 - 4 , a powder feeding device provided by the present utility model includes a feed hopper 1. The bottom end of the feed hopper 1 is fixedly connected with a discharge cylinder 2 with an open bottom. The feed hopper 1 and the discharge cylinder 2 are coaxially arranged and communicate with each other. A shaft rod 3 is arranged in the feed hopper 1. The shaft rod 3 extends vertically downward into the discharge cylinder 2. A driving mechanism 4 is provided at the top of the feed hopper 1. The driving mechanism 4 is used to drive the shaft rod 3 to rotate. Stirring rods 31 are evenly distributed on the part of the shaft rod 3 located in the feed hopper 1. A throwing disc 32 is fixed at the end of the shaft rod 3 located in the discharge cylinder 2.

[0031] When using this device to feed powder into the mixing equipment during the concrete mixing process, various powders are put into the feed hopper 1 from above. At the same time, the driving mechanism 4 works to drive the shaft rod 3 to rotate. When the shaft rod 3 rotates, it can drive the stirring rods 31 to swing in the feed hopper 1, thereby pre-stirring various powders to ensure that the powders are pre-mixed evenly, improving the mixing effect and efficiency. The well-stirred powders in the feed hopper 1 will vertically fall onto the throwing disc 32 in the discharge cylinder 2. When the shaft rod 3 rotates, it can drive the throwing disc 32 to rotate at the same time. Under the action of centrifugal force, the throwing disc 32 can throw the powders falling on it to the periphery. The powders will hit the inner wall of the discharge cylinder 2, and the agglomerated powders can be broken up to achieve fragmentation, ensuring the uniformity of the later mixing and further improving the concrete mixing effect.

[0032] Specifically, the inner diameter of the discharging cylinder body 2 is larger than the inner diameter of the bottom end of the feeding hopper 1, and the diameter of the throwing disc 32 is larger than the inner diameter of the bottom end of the feeding hopper 1, so that the throwing disc 32 can completely cover the lower port of the feeding hopper 1, ensuring that the powder discharged into the discharging cylinder body 2 from the lower end of the feeding hopper 1 can all fall on the throwing disc 32 to receive centrifugal acceleration and be thrown out. There is a gap between the outer edge wall of the throwing disc 32 and the inner wall of the discharging cylinder body 2, providing space for the powder to pass through, ensuring that the powder can normally fall through the gap between the outer edge wall of the throwing disc 32 and the inner wall of the discharging cylinder body 2.

[0033] Specifically, the driving mechanism 4 includes a vertical frame 41, a cantilever 42, a mounting seat 43 and a driving motor 44. The vertical frame 41 is vertically fixed on the top end surface of the feeding hopper 1, the cantilever 42 is horizontally fixed on the top end of the vertical frame 41, the top end of the shaft rod 3 is rotatably installed on the lower surface of the cantilever 42, the driving motor 44 is fixed on the cantilever 42 through the mounting seat 43, the output shaft of the driving motor 44 penetrates through the cantilever 42 and is fixedly connected with the top end of the shaft rod 3. By the operation of the driving motor 44, its output shaft can drive the shaft rod 3 to rotate, thereby providing drive for the stirring of the stirring rod 31 and the rotation of the throwing disc 32.

[0034] Specifically, a plurality of retaining columns 21 are fixedly arranged in an annular array around the shaft rod 3 on the inner top wall of the discharging cylinder body 2. An annular groove 321 is provided around the shaft rod 3 on the upper surface of the throwing disc 32. An annular member 322 is rotatably installed in the annular groove 321. The bottom ends of the retaining columns 21 are fixedly connected with the annular member 322. A throwing outlet 01 is formed among the inner top wall of the discharging cylinder body 2, the upper surface of the throwing disc 32 and between two adjacent retaining columns 21. After the large-volume powder agglomerates are thrown out and impact on the inner wall of the discharging cylinder body 2, small-volume powder agglomerates will be formed, which will still affect the uniformity of later stirring and mixing. Therefore, the retaining columns 21 can be used to intercept the larger-volume powder agglomerates. As the throwing disc 32 continues to rotate, the large-volume powder agglomerates continuously roll and collide with the retaining columns 21 in the space above the throwing disc 32 and surrounded by the retaining columns 21, forming small-volume powder agglomerates to reduce the agglomerate volume. When the agglomerate volume is smaller than the size of the throwing outlet 01, it can pass through the throwing outlet 01 and be thrown out on the inner wall of the discharging cylinder body 2, realizing the continuous crushing of the small-volume powder agglomerates, thereby providing two impact crushing effects, and the large-volume powder agglomerates can be gradually fragmented, further improving the fragmentation effect on the powder agglomerates.

[0035] Specifically, a sealing disc 33 is fixed on the shaft rod 3 and near the bottom end of the feed hopper 1. The outer peripheral wall of the sealing disc 33 is rotationally fitted with the inner wall of the feed hopper 1. A downwardly and upwardly penetrating material discharge port 34 is provided at an eccentric position on the sealing disc 33. The agitated powder is intercepted by the sealing disc 33 and passes through the material discharge port 34 on the sealing disc 33 and descends into the discharge cylinder body 2. When the shaft rod 3 rotates, the sealing disc 33 is driven to rotate, so that the material discharge port 34 rotates eccentrically around the shaft rod 3, enabling the material to be evenly scattered on the throwing disc 32 and preventing the powder from accumulating excessively at a certain place on the throwing disc 32 and affecting the crushing effect.

[0036] Specifically, a connecting arm 35 is fixed on the side of the shaft rod 3, and a scraping blade 36 is fixed on the connecting arm 35. The extending shape of the scraping blade 36 is adapted to the shape of the feed hopper 1 and is slidably fitted with the inner wall of the feed hopper 1. When the shaft rod 3 rotates, the scraping blade 36 can be driven to rotate through the fixed connection of the connecting arm 35. The rotating scraping blade 36 can scrape off the powder adhering to the inner wall of the feed hopper 1, preventing the powder from remaining in the feed hopper 1 and helping to discharge all the powder in the feed hopper 1.

[0037] The above is a detailed description of the present utility model in combination with specific embodiments. It cannot be determined that the specific implementation manners of the present invention are only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present invention, several equivalent substitutions or obvious modifications are made, and if the performance or use is the same, they should all be regarded as belonging to the patent protection scope determined by the claims submitted for the present utility model.

Claims

1. A powder feeding device, comprising a feeding hopper (1), characterized in that: The bottom end of the feed hopper (1) is fixedly connected to a discharge cylinder (2) with an opening at the bottom, and the feed hopper (1) and the discharge cylinder (2) are coaxial and communicated with each other; A shaft (3) is arranged in the feed hopper (1), and the shaft (3) extends vertically downward into the discharge cylinder (2). A driving mechanism (4) is provided on the top of the feed hopper (1), and the driving mechanism (4) is used to drive the shaft (3) to rotate; The portion of the shaft rod (3) located in the feed hopper (1) is evenly distributed with stirring rods (31), and the end of the shaft rod (3) located in the discharge barrel (2) is fixed with a material throwing tray (32).

2. A powder feeding device according to claim 1, characterized in that: The inner diameter of the discharge cylinder (2) is larger than the inner diameter of the bottom end of the feed hopper (1), and the diameter of the ejection plate (32) is larger than the inner diameter of the bottom end of the feed hopper (1); There is a gap between the outer edge wall of the material-discharging tray (32) and the inner wall of the material-discharging cylinder (2).

3. A powder feeding device according to claim 1, characterized in that: The driving mechanism (4) comprises a stand (41), a cantilever (42), a mounting seat (43) and a driving motor (44); The stand (41) is vertically fixed on the top end surface of the feed hopper (1), and the cantilever (42) is horizontally fixed on the top of the stand (41); The top end of the shaft rod (3) is rotatably mounted on the lower surface of the cantilever (42); the drive motor (44) is fixed to the cantilever (42) via the mounting seat (43); and the output shaft of the drive motor (44) passes through the cantilever (42) and is fixedly connected to the top end of the shaft rod (3).

4. A powder feeding device according to claim 1, characterized in that: A plurality of retaining columns (21) are fixed in a ring-shaped array on the inner top wall of the discharge cylinder (2) around the shaft (3), and an annular groove (321) is provided on the upper surface of the ejection plate (32) around the shaft (3); An annular member (322) is rotatably mounted in the annular groove (321), and the bottom end of each of the blocking columns (21) is fixedly connected to the annular member (322); An ejection outlet (01) is formed between the inner top wall of the discharge cylinder (2), the upper surface of the ejection tray (32), and two adjacent blocking columns (21).

5. A powder feeding device according to claim 1, characterized in that: A blocking disk (33) is fixed on the shaft (3) and close to the bottom end of the feed hopper (1), and the outer peripheral wall of the blocking disk (33) is rotatably fitted with the inner wall of the feed hopper (1); A material discharge opening (34) that passes through from top to bottom is provided at an eccentric position on the sealing disk (33).

6. A powder feeding device according to claim 1, characterized in that: A connecting arm (35) is fixed to the side of the shaft rod (3), and a scraper (36) is fixed to the connecting arm (35); The extended shape of the scraper (36) is adapted to the shape of the feed hopper (1), and is slidably fitted to the inner wall of the feed hopper (1).

Images