A sand and stone screening device for concrete processing

Abstract

The utility model relates to screening equipment technical field discloses a sandstone screening device for concrete processing, including feed bin, the inside rotation of screening box is connected with the hole board, the outside fixed connection of hole board has the mud screen cylinder, the outside fixed connection of mud screen cylinder has two limit rings, the inside left side fixed connection of screening box has power assembly, the inside lower extreme slide connection of screening box has two -stage screen plate, both sides fixed connection of two -stage screen plate front and back all have transmission rod, the other end fixed connection of transmission rod has primary screen plate, both sides fixed connection of two -stage screen plate all have elastic component. In the utility model, the sandstone in the mud screen cylinder inside is rolled and hits, the surface soil is handled, enters primary screen plate and two -stage screen plate and carries out vibration screening and soil removal, realizes the function that the sandstone removes the soil, has played the effect that concrete processing mixes more thoroughly.

Description

Technical Field

[0001] This utility model relates to the field of screening equipment technology, and in particular to a sand and gravel screening device for concrete processing. Background Technology

[0002] Concrete is an artificial stone material formed by mixing, stirring, molding, and hardening cementitious materials, aggregates, water, and, when necessary, admixtures and additives in a specific ratio. It is one of the most widely used structural materials in modern architecture and civil engineering, and is known as the skeleton of modern buildings. In concrete processing, sand and gravel, as aggregates, are one of the core raw materials that determine the strength, durability, and fluidity of concrete. In many industrial and agricultural scenarios such as concrete processing, ore mining, and grain processing, screening devices are specialized equipment that separates mixed materials into components of different specifications and purity based on the physical properties of the material particles, such as size, shape, and density, using specific screening media. Their core function is classification and purification—removing impurities, screening qualified materials, and realizing the graded utilization of resources, which is particularly crucial in concrete sand and gravel processing.

[0003] The core structure of a sand and gravel screening device for concrete processing typically includes a feeding mechanism, a screening body, a drive system, a discharge zone, and auxiliary components for unblocking and dust removal. First, the mixed sand and gravel to be screened is evenly transported to the screening body through the feeding hopper and conveyor belt. This body is mostly a multi-layered vibrating screen with different apertures. The motor drives the eccentric wheel and the vibrating motor to generate high-frequency vibration, causing the sand and gravel to be thrown and move in a straight line on the screen. During the process, coarse aggregate with a particle size larger than the screen aperture is intercepted, while fine aggregate with a particle size smaller than the aperture falls through the screen to the lower layer. Different levels of screens screen out different specifications of materials such as coarse sand, medium sand, fine sand, and stone powder that meet the requirements of concrete processing. Finally, they are discharged through the corresponding discharge ports.

[0004] The mainstream sand and gravel screening devices in the concrete processing industry mainly include vibrating screens, drum screens, and hydrocyclones. Vibrating screens use motors to drive the screen body to vibrate at high frequency and use the difference in screen mesh size to achieve sand and gravel classification and screening. However, their core function is limited to separating sand and gravel particles of different sizes. For mud lumps attached to the surface of sand and gravel, especially hard mud lumps that are tightly bonded to sand and gravel, the inertial force generated by vibration is difficult to remove them. As a result, the screened sand and gravel still carry a large amount of mud lumps and impurities, which require secondary manual cleaning. This not only increases labor intensity but also seriously affects production efficiency. Therefore, a sand and gravel screening device for concrete processing is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a sand and gravel screening device for concrete processing, which aims to improve the problem of poor soil treatment on sand and gravel in some existing screening devices.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sand and gravel screening device for concrete processing includes a support frame, a screening box is fixedly connected to the upper inner end of the support frame, a screening mechanism is fixedly connected to the right outer side of the screening box, and protective mechanisms are fixedly connected to the left and right sides of the support frame.

[0008] The screening mechanism includes a feeding hopper, which is fixedly connected to the outside of the screening box on the right side. A drive assembly is fixedly connected to the outside of the screening box on the left side. A perforated plate is rotatably connected inside the screening box. A mud separating screen cylinder is fixedly connected to the outside of the perforated plate. Two limiting rings are fixedly connected to the outside of the mud separating screen cylinder. A power assembly is fixedly connected to the inside of the screening box on the left side. A secondary screen plate is slidably connected to the lower inside of the screening box. A transmission rod is fixedly connected to both the front and rear sides of the secondary screen plate. A primary screen plate is fixedly connected to the other end of the transmission rod. Elastic components are fixedly connected to both the left and right sides of the secondary screen plate.

[0009] As a further description of the above technical solution:

[0010] Both of the protective mechanisms include a collection box. The two collection boxes are fixedly connected to the left and right sides of the support frame. Multiple vacuum fans are fixedly connected inside the collection box. A filter plate is fixedly connected inside the collection box. A collection box is slidably connected inside the collection box. Limiting plates are fixedly connected to the left and right sides of the collection box. A connecting plate is fixedly connected to the upper part of the internal part of the screening box. Multiple cleaning brushes are fixedly connected to the bottom of the connecting plate.

[0011] As a further description of the above technical solution:

[0012] The drive assembly includes a motor a, which is externally and fixedly connected to the left side of the screening box. The drive end of the motor a is fixedly connected to a rotating shaft a, which is externally and fixedly connected to the outside of the perforated plate.

[0013] As a further description of the above technical solution:

[0014] The power assembly includes a motor b, which is externally fixedly connected to the inside left side of the screening box. A rotating shaft b is fixedly connected to the drive end of the motor b. A connecting shaft is fixedly connected to the outside of the rotating shaft b. A connecting rod is fixedly connected to the outside of the connecting shaft. The other end of the connecting rod is fixedly connected to the outside of the secondary screen plate.

[0015] As a further description of the above technical solution:

[0016] Each of the elastic components includes a telescopic column, and the adjacent sides of the telescopic columns on the left and right sides are fixedly connected to the left and right sides of the secondary sieve plate. A spring is sleeved on the outside of the telescopic column.

[0017] As a further description of the above technical solution:

[0018] Multiple fixing rings are fixedly connected to both the front and rear sides of the support frame, and spray water pipes are placed inside the multiple fixing rings.

[0019] As a further description of the above technical solution:

[0020] One end of each of the springs is fixedly connected to the left and right sides of the screening box, and the other end of the other half of the springs is fixedly connected to the left and right sides of the secondary sieve plate.

[0021] As a further description of the above technical solution:

[0022] The two limiting rings are externally rotatably connected to the inside of the screening box, and a mud separating screen cylinder is rotatably connected inside the screening box. The outside of the mud separating screen cylinder is slidably connected to the bottom of the plurality of cleaning brushes.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, by setting up a rotating mud-separating screen cylinder and vibrating primary and secondary screen plates, multi-stage screening and soil stripping are achieved in a coordinated manner. Starting motor a drives the mud-separating screen cylinder to rotate, causing the incoming sand and gravel to tumble and collide inside the cylinder, effectively stripping away the soil adhering to its surface. Subsequently, the sand and gravel enter the primary and secondary screen plates, which vibrate synchronously driven by motor b, for precise screening while further removing residual soil. This structure improves the cleanliness of the sand and gravel, ensuring high-quality processing of subsequent concrete.

[0025] 2. This utility model significantly improves the working environment and protects the equipment by incorporating an integrated dustproof and cleaning system. Activating the dust extraction fan draws dust generated during the screening process into the collection box, where it is efficiently collected and processed via a filter plate and collection box. Simultaneously, cleaning brushes located on the outside of the sludge separating screen continuously clean the screen during operation, preventing clogging. This design not only reduces the health hazards of dust to operators but also lowers the risk of dust entering and causing wear on core components, extending the device's service life. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a sand and gravel screening device for concrete processing proposed in this utility model.

[0027] Figure 2This is a schematic diagram of the limiting ring of a sand and gravel screening device for concrete processing proposed in this utility model;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a schematic diagram of the structure of the fixing ring of a sand and gravel screening device for concrete processing proposed in this utility model;

[0030] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0031] Legend:

[0032] 1. Support frame; 2. Screening box; 3. Screening mechanism; 31. Feed hopper; 32. Drive assembly; 321. Motor a; 322. Rotating shaft a; 33. Perforated plate; 34. Sludge separating screen cylinder; 35. Limiting ring; 36. Power assembly; 361. Motor b; 362. Rotating shaft b; 363. Connecting shaft; 364. Connecting rod; 37. Secondary screen plate; 38. Transfer rod; 39. Primary screen plate; 310. Elastic assembly; 3101. Telescopic column; 3102. Spring; 4. Protective mechanism; 41. Collection box; 42. Dust extraction fan; 43. Filter plate; 44. Collection box; 45. Limiting plate; 46. Fixing ring; 47. Connecting plate; 48. Cleaning brush; 49. Spray water pipe. Detailed Implementation

[0033] 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.

[0034] A sand and gravel screening device for concrete processing, as described in the following figure. Figures 1 to 3The device includes a support frame 1, which supports the entire sand and gravel screening device for concrete processing. The upper part of the support frame 1 is fixedly connected to a screening box 2, providing installation space and working environment, and also acting as a barrier for sand, gravel, soil and other materials during the screening process. The right side of the screening box 2 is fixedly connected to a screening mechanism 3, which includes a feed hopper 31. The feed hopper 31 is the feeding channel for sand and gravel to enter the screening device and is used to receive the sand and gravel raw materials to be screened. The feed hopper 31 is fixedly connected to the right side of the screening box 2. The left side of the screening box 2 is fixedly connected to a drive assembly 32, which includes a motor a321, which provides power for the rotation of the rotating shaft a322, thereby driving the mud separating screen cylinder 34 to rotate. The motor a321 is fixedly connected to the left side of the screening box 2. The drive end of the motor a321 is fixedly connected to the rotating shaft a322, which is used to transmit the power output by the motor a321 to the mud separating screen cylinder 34. The rotating shaft a322 is fixedly connected to the outside of the perforated plate 33.

[0035] Specifically, the support frame 1 serves as the basic load-bearing component, providing stable support for the entire device and ensuring operational stability. The screening box 2 not only provides installation space and working environment but also encloses materials such as sand, gravel, and soil during the screening process, preventing material spillage and maintaining a clean working environment. In the screening mechanism 3, the feed hopper 31 can efficiently receive the sand and gravel raw materials to be screened, ensuring smooth feeding. The motor a321 of the drive component 32 can stably provide power, which is transmitted to the mud separating screen cylinder 34 through the rotating shaft a322, driving it to rotate and achieve sand and gravel screening. The overall components are tightly fitted, effectively improving the efficiency and effect of sand and gravel screening and meeting the screening requirements of concrete processing for sand and gravel raw materials.

[0036] The screening box 2 has a perforated plate 33 rotatably connected inside, and a mud-separating screen cylinder 34 is fixedly connected to the outside of the perforated plate 33. Through its own rotation, the sand and gravel inside undergo rolling and impact motion, thereby peeling off the mud adhering to the surface of the sand and gravel. Two limiting rings 35 are fixedly connected to the outside of the mud-separating screen cylinder 34 to limit its position during rotation. The two limiting rings 35 are rotatably connected to the inside of the screening box 2. The mud-separating screen cylinder 34 rotatably connects to the inside of the screening box 2. Through its own rotation, the sand and gravel inside undergo rolling and impact motion, thereby peeling off the mud adhering to the surface of the sand and gravel. The mud-separating screen cylinder 34 is slidably connected to the bottom of multiple cleaning brushes 48. A power unit is fixedly connected to the left side of the inside of the screening box 2. Component 36, power assembly 36 includes motor b361, which provides power for the rotation of rotating shaft b362. The motor b361 is externally fixedly connected to the inside left side of screening box 2. The drive end of motor b361 is fixedly connected to rotating shaft b362, which is used to transmit the rotational power output by motor b361 to connecting shaft 363. The external side of rotating shaft b362 is fixedly connected to connecting shaft 363, which is used to convert the rotational motion of rotating shaft b362 into the reciprocating swing of connecting rod 364. The external side of connecting shaft 363 is fixedly connected to connecting rod 364, which transmits the motion of connecting shaft 363 to secondary screen plate 37, causing secondary screen plate 37 to vibrate under its drive. The other end of connecting rod 364 is fixedly connected to the outside of secondary screen plate 37.

[0037] Specifically, the drive assembly 32 drives the perforated plate 33 and the mud-separating screen cylinder 34 to rotate, causing the sand and gravel to roll and impact to remove surface mud. The limiting ring 35 restricts the position of the mud-separating screen cylinder 34 to ensure stable rotation. The cleaning brush 48 can clean the outside of the mud-separating screen cylinder 34 to ensure its screening performance. In the power assembly 36, the motor b361 transmits power to the connecting rod 364 through the rotating shaft b362 and the connecting shaft 363, which drives the secondary screen plate 37 to vibrate, realizing secondary screening of sand and gravel.

[0038] A secondary screen plate 37 is slidably connected to the lower end of the screening box 2 to perform secondary screening of the sand and gravel falling from the mud separating screen cylinder 34. Transmission rods 38 are fixedly connected to both the front and rear sides of the secondary screen plate 37. When the secondary screen plate 37 vibrates, the vibration is transmitted to the primary screen plate 39 through the transmission rods 38. The other end of the transmission rod 38 is fixedly connected to the primary screen plate 39, which performs a first screening of the sand and gravel falling from the mud separating screen cylinder 34. Elastic components 310 are fixedly connected to both the left and right sides of the secondary screen plate 37. Multiple elastic components 310... The system includes telescopic columns 3101, which provide support and guidance for springs 3102. The adjacent sides of the telescopic columns 3101 on both the left and right sides are fixedly connected to the left and right sides of the secondary screen plate 37. Springs 3102 are sleeved on the outside of the telescopic columns 3101, which generate elastic force when the screen plate vibrates, thus buffering the vibration of the screen plate and reducing the impact force when the screen plate vibrates. One end of multiple springs 3102 is fixedly connected to the left and right sides of the screening box 2, and the other end of the other half of the springs 3102 is fixedly connected to the left and right sides of the secondary screen plate 37.

[0039] Specifically, the power component 36 drives the secondary screen plate 37 to vibrate, which synchronously drives the primary screen plate 39 to operate through the transmission rod 38, realizing the primary and secondary classification and screening of sand and gravel falling from the mud separating screen cylinder 34, effectively improving the screening accuracy. In the elastic component 310, the telescopic column 3101 provides support and guidance for the spring 3102. The spring 3102 can generate elastic buffer when the screen plate vibrates, reducing the vibration impact force, which not only ensures the stability of the screen plate vibration screening, but also reduces the wear and tear of components caused by vibration, and extends the service life of the equipment.

[0040] Reference Figure 1 , Figure 4 and Figure 5Protective mechanisms 4 are fixedly connected to the left and right sides of the support frame 1. Each protective mechanism 4 includes a collection box 41 to prevent dust from spilling out during the dust collection process and to ensure dust collection efficiency. The two collection boxes 41 are externally fixedly connected to the left and right sides of the support frame 1. Multiple dust collection fans 42 are fixedly connected inside the collection boxes 41 to suck the dust generated during the sand and gravel processing into the collection boxes 41. A filter plate 43 is fixedly connected inside the collection boxes 41, mainly to protect the dust collection fans 42 from damage by large dust particles. A collection box 44 is slidably connected inside the collection boxes 41 to achieve centralized dust storage for convenient subsequent processing. The collection box 44 is uniformly removed and processed. Limiting plates 45 are fixedly connected to the left and right sides of the outside to limit the sliding range of the collection box 44 in the collection box 41. A connecting plate 47 is fixedly connected to the upper part of the inside of the screening box 2. Multiple cleaning brushes 48 are fixedly connected to the bottom of the connecting plate 47 to brush off the mud and fine sand adhering to the outer surface of the mud separating screen cylinder 34. Multiple fixing rings 46 are fixedly connected to the front and rear sides of the support frame 1 to provide stable support points for the spray water pipe 49. The spray water pipe 49 is placed inside the multiple fixing rings 46. By spraying clean water, it helps to suppress the spread of dust when the dust concentration is too high.

[0041] Specifically, in the protective mechanism 4, the collection box 41 can prevent dust from overflowing, the dust suction fan 42 can efficiently suck up dust, the filter plate 43 can protect the fan from damage, the collection box 44 facilitates the centralized storage and treatment of dust, the limiting plate 45 can limit its sliding range, the cleaning brush 48 can brush off the adhering substances on the outer surface of the mud separating screen cylinder 34 to ensure screening efficiency, the fixing ring 46 provides stable support for the spray water pipe 49, and the spray water pipe 49 suppresses the spread of dust by spraying water.

[0042] The implementation principle of this application embodiment is as follows: First, the sand and gravel to be screened enter the mud-separating screen cylinder 34 inside the screening box 2 through the feed hopper 31. Then, the motor a321 is started to drive the rotating shaft a322 to rotate, and the mud-separating screen cylinder 34 is driven to rotate under the restriction of two limiting rings 35 through the perforated plate 33. During the rotation, the sand and gravel inside the mud-separating screen cylinder 34 continuously roll and collide, and the soil attached to the surface gradually falls off. Some of the soil falls off initially through the holes of the mud-separating screen cylinder 34. At the same time, multiple cleaning brushes 48 at the bottom of the connecting plate 47 slide in contact with the outer surface of the mud-separating screen cylinder 34, continuously brushing away the soil. The soil and fine sand adhering to the surface then fall into the primary screen plate 39 below. At the same time, the motor b361 starts and drives the rotating shaft b362 to rotate. Through the connecting shaft 363, the connecting rod 364 swings back and forth, causing the secondary screen plate 37 to vibrate. The secondary screen plate 37 drives the primary screen plate 39 to vibrate synchronously through the transmission rods 38 on the front and rear sides. While vibrating, the springs 3102 on the left and right sides of the primary screen plate 39 and the secondary screen plate 37 extend and retract under the guidance of the telescopic column 3101, which plays a buffering role. The soil that falls off during screening passes through the gaps in the screen plate and falls into the trolley at the bottom of the screening box 2.

[0043] Multiple vacuum fans 42 are activated to suck the dust raised around the bottom of the cart into the collection box 41. After being filtered by the filter plate 43, the dust is blocked and collected by the collection box 44. The limiting plate 45 prevents the collection box 44 from sliding out of the collection box 41. When the dust concentration is high, clean water can be sprayed through the spray pipe 49 fixed by the fixing ring 46 to assist in dust reduction.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sand and gravel screening device for concrete processing, comprising a support frame (1), characterized in that: The upper part of the support frame (1) is fixedly connected to a screening box (2), the right side of the screening box (2) is fixedly connected to a screening mechanism (3), and the left and right sides of the support frame (1) are fixedly connected to a protective mechanism (4). The screening mechanism (3) includes a feeding hopper (31), which is fixedly connected to the outside of the screening box (2) on the right side. A drive assembly (32) is fixedly connected to the outside of the screening box (2) on the left side. A perforated plate (33) is rotatably connected inside the screening box (2). A mud separating screen cylinder (34) is fixedly connected to the outside of the perforated plate (33). Two limiting rings (35) are fixedly connected to the outside of the mud separating screen cylinder (34). A power assembly (36) is fixedly connected to the inside of the screening box (2) on the left side. A secondary screen plate (37) is slidably connected to the lower inside of the screening box (2). A transmission rod (38) is fixedly connected to both the front and rear sides of the secondary screen plate (37). A primary screen plate (39) is fixedly connected to the other end of the transmission rod (38). An elastic assembly (310) is fixedly connected to both the left and right sides of the secondary screen plate (37).

2. The sand and gravel screening device for concrete processing according to claim 1, characterized in that: Both of the protective mechanisms (4) include a collection box (41). The two collection boxes (41) are fixedly connected to the left and right sides of the support frame (1). Multiple vacuum fans (42) are fixedly connected inside the collection box (41). A filter plate (43) is fixedly connected inside the collection box (41). A collection box (44) is slidably connected inside the collection box (41). Limiting plates (45) are fixedly connected to the left and right sides of the collection box (44). A connecting plate (47) is fixedly connected to the upper part of the internal part of the screening box (2). Multiple cleaning brushes (48) are fixedly connected to the bottom of the connecting plate (47).

3. The sand and gravel screening device for concrete processing according to claim 1, characterized in that: The drive assembly (32) includes a motor a (321), which is externally fixedly connected to the left side of the screening box (2). The drive end of the motor a (321) is fixedly connected to a rotating shaft a (322), which is externally fixedly connected to the outside of the perforated plate (33).

4. The sand and gravel screening device for concrete processing according to claim 1, characterized in that: The power assembly (36) includes a motor b (361), which is externally fixedly connected to the left side of the inside of the screening box (2). The drive end of the motor b (361) is fixedly connected to a rotating shaft b (362), and the outside of the rotating shaft b (362) is fixedly connected to a connecting shaft (363). The outside of the connecting shaft (363) is fixedly connected to a connecting rod (364), and the other end of the connecting rod (364) is fixedly connected to the outside of the secondary screen plate (37).

5. The sand and gravel screening device for concrete processing according to claim 1, characterized in that: Each of the elastic components (310) includes a telescopic column (3101), and the adjacent sides of the telescopic columns (3101) on the left and right sides are fixedly connected to the left and right sides of the secondary sieve plate (37). A spring (3102) is sleeved on the outside of the telescopic column (3101).

6. The sand and gravel screening device for concrete processing according to claim 2, characterized in that: Multiple fixing rings (46) are fixedly connected to both the front and rear sides of the support frame (1), and spray water pipes (49) are placed inside the multiple fixing rings (46).

7. The sand and gravel screening device for concrete processing according to claim 5, characterized in that: One end of each of the springs (3102) is fixedly connected to the left and right sides of the screening box (2), and the other end of the other half of the springs (3102) is fixedly connected to the left and right sides of the secondary sieve plate (37).

8. The sand and gravel screening device for concrete processing according to claim 2, characterized in that: The two limiting rings (35) are externally rotatably connected to the inside of the screening box (2), and the inside of the screening box (2) is rotatably connected to the mud separating screen cylinder (34), and the outside of the mud separating screen cylinder (34) is slidably connected to the bottom of the plurality of cleaning brushes (48).

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