A raw material screening device for concrete product production

Abstract

The utility model relates to concrete product production technical field, concretely disclose a raw material screening device for concrete product production, including protective housing, its upper surface is installed with the feed pipeline, the filter screen board is installed to the protective housing upper end cavity inner wall, the collecting box is provided with the protective housing lower end cavity inner wall, the side surface fixed connection of protective housing has the material guiding pipeline, the upper surface fixed connection of material guiding pipeline has the dust collecting box, and the upper surface fixed dust collecting box has the dust falling air pump. The raw material screening device for concrete product production, through the drive motor drives first sprocket and extrusion cam rotation, cooperation linkage slide and spring structure, make filter screen board produce high frequency vibration, can quickly shake off the raw material impurity inlayed in the sieve plate aperture, completely solve the problem that traditional filter screen is easy to block, avoid the screening interruption caused by the blockage, improve the overall screening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of concrete product manufacturing technology, specifically to a raw material screening device for concrete product manufacturing. Background Technology

[0002] Concrete products refer to industrialized products with specific shapes, properties, and uses, made from concrete, which is a mixture of cementitious materials, aggregates, water, and admixtures in a certain proportion as the core raw material, through processes such as mixing, molding, and curing. They are widely used in construction, transportation, water conservancy, municipal engineering, and other fields, and are one of the core materials for modern infrastructure construction and engineering projects. The performance of concrete products, such as strength, durability, and stability, directly depends on the quality of raw materials. Therefore, raw material selection is a core link in production. Strict screening standards and testing procedures should be established for each type of raw material, focusing on the three major goals of "matching product functions, controlling costs, and ensuring stability".

[0003] When processing concrete products, due to impurities in the raw materials or the raw materials not being the same as the aggregate specifications required for different products, screening is necessary to improve the processing quality. When using existing screening devices, the raw materials are generally separated by a filter screen before being discharged for sorting. However, the raw materials are easily embedded on the surface of the filter screen, causing blockage of subsequent raw materials and thus affecting the discharge of raw materials. Utility Model Content

[0004] The purpose of this utility model is to provide a raw material screening device for concrete product production, so as to solve the problem mentioned in the background art that the raw materials are generally separated by a filter screen and then discharged for sorting, but the raw materials are easily embedded on the surface of the filter screen and cause blockage to subsequent raw materials, thereby affecting the discharge of raw materials.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a raw material screening device for concrete product production, comprising a protective shell, a feeding pipe installed through its upper surface, a filter screen plate installed on the inner wall of the upper cavity of the protective shell, a collection box provided on the inner wall of the lower cavity of the protective shell, a guiding pipe fixedly connected to the side surface of the protective shell, a dust collection box fixedly connected to the upper surface of the guiding pipe, a dust suppression air pump fixedly connected to the upper surface of the dust collection box, a dust suppression suction nozzle fixedly connected to the top surface of the cavity of the dust collection box, a sealing airbag fixedly connected to the inner wall of the lower cavity of the protective shell, a drive motor fixedly connected to the rear surface of the protective shell, a first sprocket installed through the rear surface of the protective shell, a compression cam fixedly connected to one end of the shaft of the first sprocket, a linkage slide rod fixedly connected to the lower surface of the filter screen plate, and a feeding mechanism provided in the upper cavity of the protective shell.

[0006] Preferably, the protective shell and the filter screen plate are slidably connected, and one end of the filter screen plate passes through the opening on the side surface of the protective shell. The filter screen plate is inclined, and one end of the collection box passes through the front surface of the protective shell.

[0007] Using the above technical solution, the filter screen plate adopts an inclined design. When the raw material falls on the screen plate, it will slide naturally along the inclined direction under the action of gravity. During this process, the raw material that meets the specifications can fall into the collection box through the screen plate holes more quickly, while the impurities exceeding the standard will be discharged from the screen plate through end as it slides. No additional power is needed to drive the raw material to move, which saves energy and avoids the accumulation of raw material on the screen plate surface, thereby improving the screening speed and separation effect.

[0008] Preferably, the material guide pipe is connected to the opening on the side surface of the protective shell, the width of the opening at one end of the material guide pipe is smaller than the width of the opening at the other end, the dust collection box is connected to the dust suppression air pump and the dust suppression suction nozzle respectively, and a filter screen is provided between the dust collection box and the dust suppression air pump.

[0009] Using the above technical solution, the dust collection box is connected to the dust-suppressing air pump and the dust-suppressing nozzle respectively. After the dust-suppressing air pump is started, a negative pressure is formed in the dust collection box. The dust-suppressing nozzle can quickly adsorb the dust generated during the raw material screening process. Compared with the traditional open screening device, it effectively avoids the dust from spreading into the workshop air, reduces the health risk of operators inhaling dust, and reduces the pollution and corrosion of equipment circuits and transmission components by dust.

[0010] Preferably, the sealing airbag is in contact with the lower surface of the collection box, the first sprocket is rotatably connected to the protective shell, and one end of the first sprocket shaft is fixedly connected to the output end of the drive motor.

[0011] Using the above technical solution, the sealing airbag fits into the lower surface of the collection box. When the collection box is pushed into the protective shell, the airbag can fill the gap between the box and the inner wall of the shell through its own elastic deformation. Compared with the traditional rigid seal, the flexible airbag can adapt to the slight deviation during the installation of the collection box, achieve "no dead angle seal", effectively prevent qualified raw materials from leaking out from the gap at the bottom of the box, and avoid material waste and material accumulation at the bottom of the equipment.

[0012] Preferably, the outer surface of the extrusion cam is in contact with the lower end of the linkage slide rod, the linkage slide rod is slidably connected to the inner wall of the protective shell, and a spring is connected between the linkage slide rod and the protective shell.

[0013] Using the above technical solution, the outer surface of the extrusion cam is in contact with the lower end of the linkage slide rod. When the first sprocket drives the extrusion cam to rotate, the eccentric structure of the cam will periodically push up the linkage slide rod. Since the linkage slide rod is fixedly connected to the filter screen plate, the up and down movement of the slide rod will cause the filter screen plate to generate high-frequency small-amplitude vibration. This vibration can "shake off" the raw material impurities embedded in the screen plate pores, fundamentally solving the problem of reduced screening efficiency caused by raw material blockage in traditional screen plates, and keeping the screen plate pores unobstructed at all times.

[0014] Preferably, the feeding mechanism includes a second sprocket, which is installed through the upper rear surface of the protective housing. A feeding wheel is rotatably connected to the inner wall of the cavity of the protective housing, and a metering groove is formed on the surface of the feeding wheel.

[0015] Using the above technical solution, the feeding wheel is rotatably connected to the inner wall of the protective shell cavity. After the raw material falls into the feed pipe, it needs to be rotated by the wheel to enter the filter screen plate. Compared with the traditional "free fall" feeding method, the wheel can adjust the falling speed of the raw material by controlling the rotation speed, avoiding a large amount of raw material to accumulate on the filter screen plate instantly, which would cause the screen plate to be overloaded, the screening to be incomplete or blocked, and ensure that the screening process is carried out "uniformly and with low load".

[0016] Preferably, the second sprocket and the protective shell are rotatably connected, and a transmission chain is provided between the second sprocket and the first sprocket. The shaft of the feeding wheel is fixedly connected to the shaft of the second sprocket. The quantitative grooves are arranged in a circumferential array, and the inner wall of the quantitative grooves is arc-shaped.

[0017] Using the above technical solution, the quantitative groove is set in a circular array, which allows the raw material to fall "continuously and evenly" during the rotation of the wheel, avoiding interruption of feeding. The inner wall of the groove is designed with an arc shape. Compared with the right-angle inner wall, the arc structure can reduce the residue of raw material in the groove, ensure the accuracy of the amount of raw material conveyed by the groove each time, further improve the quantitative feeding accuracy, and ensure the consistency of the raw material ratio of concrete products.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the raw material screening device for concrete product production: 1. The drive motor drives the first sprocket and the extrusion cam to rotate, which, together with the linkage slide rod and spring structure, causes the filter screen plate to vibrate at high frequency. This can quickly shake off the raw material impurities embedded in the screen plate holes, completely solving the problem of easy clogging of traditional filter screens, avoiding screening interruptions caused by clogging, and improving the overall screening efficiency. 2. The dust collection box, dust suppression air pump and dust suppression nozzle above the material guide pipe form a negative pressure dust collection system, which can efficiently adsorb the dust generated during the screening process, reduce the impact of dust diffusion on the health of operators, and at the same time, the filter screen between the dust collection box and the dust suppression air pump can trap dust, prevent it from entering the air pump and causing malfunctions, and extend the equipment operation and maintenance cycle. 3. The quantitative groove of the feeding wheel in the feeding mechanism can realize the uniform and quantitative feeding of raw materials, avoid the accumulation of raw materials on the filter screen plate and overload. The sealing airbag inside the protective shell fits closely with the collection box, which can fill the gap to prevent qualified raw materials from leaking and reduce waste. At the same time, the through-type design of the collection box facilitates quick unloading and cleaning. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the connection between the protective shell and the feed pipe of this utility model; Figure 2 This is a three-dimensional structural diagram of the connection between the dust collection box and the dust-reducing air pump of this utility model; Figure 3 This is a three-dimensional structural diagram of the connection between the material guiding pipe and the dust suction nozzle of this utility model; Figure 4 This is a three-dimensional structural diagram of the connection between the feeding wheel and the metering groove of this utility model; Figure 5 This is a three-dimensional structural diagram of the connection between the extrusion cam and the linkage slide rod of this utility model; Figure 6 This is a three-dimensional structural diagram of the connection between the drive motor and the first sprocket of this utility model.

[0020] In the diagram: 1. Protective outer shell; 2. Feed pipe; 3. Filter screen plate; 4. Collection box; 5. Guide pipe; 6. Dust collection box; 7. Dust suppression air pump; 8. Dust suppression suction nozzle; 9. Sealing airbag; 10. Drive motor; 11. First sprocket; 12. Extrusion cam; 13. Linkage slide bar; 14. Second sprocket; 15. Feeding wheel; 16. Metering groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-6This utility model provides a technical solution: a raw material screening device for concrete product production, comprising a protective shell 1, a feeding pipe 2, a filter screen plate 3, a collection box 4, a guiding pipe 5, a dust collection box 6, a dust suppression air pump 7, a dust suppression suction nozzle 8, a sealing airbag 9, a drive motor 10, a first sprocket 11, a pressing cam 12, a linkage slide rod 13, a second sprocket 14, a feeding wheel 15, and a metering groove 16. The upper surface of the protective shell 1 is permeated by the feeding pipe 2, and the inner wall of the upper cavity of the protective shell 1 is fitted with a filter screen plate 3. The protective shell 1 and the filter screen plate 3 are connected. The sieve plate 3 forms a sliding connection, and one end of the filter sieve plate 3 penetrates the opening on the side surface of the protective shell 1. The filter sieve plate 3 is designed to be inclined. One end of the collection box 4 penetrates the front surface of the protective shell 1. When the drive motor 10 is started, its output end drives the first sprocket 11 to rotate. The first sprocket 11 drives the second sprocket 14 to rotate through the transmission chain. The feeding wheel 15, which is fixed to the rotating shaft of the second sprocket 14, rotates accordingly. After the raw material is put into the feed pipe 2, it will fill the quantitative groove 16 on the surface of the feeding wheel 15. As the wheel rotates, it quantitatively transports the raw material to the filter sieve plate 3 below.

[0023] A collection box 4 is provided on the inner wall of the cavity at the lower end of the protective shell 1. A material guide pipe 5 is fixedly connected to the side surface of the protective shell 1. A dust collection box 6 is fixedly connected to the upper surface of the material guide pipe 5, and a dust suppression air pump 7 is fixedly fixed to the upper surface of the dust collection box 6. A dust suppression suction nozzle 8 is fixedly connected to the top surface of the cavity of the dust collection box 6. The material guide pipe 5 is connected to the opening on the side surface of the protective shell 1. The width of the opening at one end of the material guide pipe 5 is smaller than the width of the opening at the other end. The dust collection box 6 is connected to both the dust suppression air pump 7 and the dust suppression suction nozzle 8. A filter screen is installed between the air pumps 7. When the first sprocket 11 rotates, the squeezing cam 12 at one end of its shaft rotates synchronously. The outer surface of the squeezing cam 12 periodically pushes up the linkage slide rod 13 that is in contact with it. Since there is a spring connecting the linkage slide rod 13 and the protective shell 1, the spring pulls the slide rod back to its original position after the cam rotates to the highest point, which drives the filter screen plate 3 fixed with the slide rod to vibrate at high frequency. The raw materials that meet the specifications fall through the holes of the screen plate, while the impurities that exceed the standard slide along the inclined filter screen plate 3 into the opening on the side surface of the protective shell 1, and are then discharged through the guide pipe 5.

[0024] A sealing airbag 9 is fixedly connected to the inner wall of the cavity at the lower end of the protective shell 1. A drive motor 10 is fixedly connected to the rear surface of the protective shell 1. A first sprocket 11 is installed through the rear surface of the protective shell 1. A compression cam 12 is fixed to one end of the shaft of the first sprocket 11. A linkage slide rod 13 is fixedly connected to the lower surface of the filter screen plate 3. The sealing airbag 9 is in contact with the lower surface of the collection box 4. The first sprocket 11 and the protective shell 1 are rotatably connected. One end of the shaft of the first sprocket 11 is fixedly connected to the output end of the drive motor 10. The outer surface of the extrusion cam 12 is in contact with the lower end of the linkage slide rod 13. The linkage slide rod 13 is slidably connected to the inner wall of the protective shell 1, and a spring is connected between the linkage slide rod 13 and the protective shell 1. During the screening process, the dust-suppressing air pump 7 is started to create a negative pressure in the dust collection box 6. The dust collection box 6 adsorbs the dust generated in the material guide pipe 5 and the protective shell 1 through the dust-suppressing suction nozzle 8. After the dust enters the dust collection box 6, it is intercepted by the filter screen between the dust collection box 6 and the dust-suppressing air pump 7 to prevent the dust from entering the air pump or spreading to the outside.

[0025] A feeding mechanism is provided in the upper cavity of the protective shell 1. The feeding mechanism includes a second sprocket 14, which is installed through the rear surface of the upper end of the protective shell 1. A feeding wheel 15 is rotatably connected to the inner wall of the cavity of the protective shell 1. A metering groove 16 is formed on the surface of the feeding wheel 15. The second sprocket 14 is rotatably connected to the protective shell 1, and a transmission chain is provided between the second sprocket 14 and the first sprocket 11. The rotating shaft of the feeding wheel 15 is fixedly connected to the rotating shaft of the second sprocket 14. The metering grooves 16 are arranged in a circumferential array, and the inner wall of the metering grooves 16 is arc-shaped. The qualified raw materials passing through the filter screen plate 3 fall into the collection box 4 in the lower cavity of the protective shell 1. The lower surface of the collection box 4 is in contact with the sealing airbag 9 to prevent the raw materials from leaking from the gap between the box and the shell. When the raw materials in the collection box reach a certain amount, the collection box 4 penetrating the front surface of the protective shell 1 can be directly pulled out to complete the unloading of qualified raw materials.

[0026] Working principle: When using the raw material screening device for concrete product production, start the drive motor 10, which drives the first sprocket 11 to rotate. On one hand, the first sprocket 11 drives the second sprocket 14 and the feeding wheel 15 to rotate through the transmission chain. The raw material enters the quantitative groove 16 of the feeding wheel 15 through the feeding pipe 2 and is quantitatively conveyed to the filter screen plate 3. On the other hand, the first sprocket 11 drives the extrusion cam 12 to rotate, which lifts the linkage slide rod 13. With the help of the spring, the filter screen plate 3 vibrates at high frequency. Qualified raw materials fall into the collection box 4, and impurities are discharged through the guide pipe 5. At the same time, the dust suppression air pump 7 is started. The dust collection box 6 absorbs dust through the dust suppression suction nozzle 8. The filter screen traps dust to protect the air pump, and the sealing air bag 9 prevents raw material leakage. After the collection box is full, it is pulled out to unload the material, which increases the overall practicality.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A raw material screening device for concrete product production, comprising a protective outer shell (1) with a feed pipe (2) installed through its upper surface, characterized in that: A filter screen plate (3) is installed on the inner wall of the upper cavity of the protective shell (1). A collection box (4) is provided on the inner wall of the lower cavity of the protective shell (1). A material guide pipe (5) is fixedly connected to the side surface of the protective shell (1). A dust collection box (6) is fixedly connected to the upper surface of the material guide pipe (5). A dust-reducing air pump (7) is fixedly connected to the upper surface of the dust collection box (6). A dust-reducing suction nozzle (8) is fixedly connected to the top surface of the cavity of the dust collection box (6). A sealing airbag (9) is fixedly connected to the inner wall of the lower cavity of the protective shell (1). A drive motor (10) is fixedly connected to the rear surface of the protective shell (1). A first sprocket (11) is installed through the rear surface of the protective shell (1). A squeezing cam (12) is fixed to one end of the shaft of the first sprocket (11). A linkage slide rod (13) is fixedly connected to the lower surface of the filter screen plate (3). A feeding mechanism is provided in the upper cavity of the protective shell (1).

2. The raw material screening device for concrete product production according to claim 1, characterized in that: The protective shell (1) and the filter screen plate (3) are slidably connected, and one end of the filter screen plate (3) penetrates the opening on the side surface of the protective shell (1). The filter screen plate (3) is inclined, and one end of the collection box (4) penetrates the front surface of the protective shell (1).

3. The raw material screening device for concrete product production according to claim 1, characterized in that: The material guide pipe (5) is connected to the opening on the side surface of the protective shell (1). The width of the opening at one end of the material guide pipe (5) is smaller than the width of the opening at the other end. The dust collection box (6) is connected to the dust-suppressing air pump (7) and the dust-suppressing suction nozzle (8) respectively. A filter screen is provided between the dust collection box (6) and the dust-suppressing air pump (7).

4. The raw material screening device for concrete product production according to claim 1, characterized in that: The sealing airbag (9) is attached to the lower surface of the collection box (4), the first sprocket (11) and the protective shell (1) are rotatably connected, and one end of the shaft of the first sprocket (11) is fixedly connected to the output end of the drive motor (10).

5. The raw material screening device for concrete product production according to claim 1, characterized in that: The outer surface of the extrusion cam (12) is in contact with the lower end of the linkage slide rod (13), the linkage slide rod (13) is slidably connected to the inner wall of the protective shell (1), and a spring is connected between the linkage slide rod (13) and the protective shell (1).

6. The raw material screening device for concrete product production according to claim 1, characterized in that: The feeding mechanism includes a second sprocket (14), which is installed through the rear surface of the upper end of the protective shell (1). The inner wall of the cavity of the protective shell (1) is rotatably connected to a feeding wheel (15), and a quantitative groove (16) is opened on the surface of the feeding wheel (15).

7. The raw material screening device for concrete product production according to claim 6, characterized in that: The second sprocket (14) is rotatably connected to the protective shell (1), and a transmission chain is provided between the second sprocket (14) and the first sprocket (11). The shaft of the feeding wheel (15) is fixedly connected to the shaft of the second sprocket (14). The quantitative groove (16) is arranged in a circular array, and the inner wall of the quantitative groove (16) is arc-shaped.

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