A sand and gravel screening device for concrete

Abstract

This utility model discloses a sand and gravel screening device for concrete, relating to the technical field of screening devices. The utility model includes a support frame and further includes: a cleaning section disposed within the support frame; a feeding section disposed at the top of the support frame; the cleaning section includes a cleaning assembly mounted on the support frame; and a screening assembly mounted on the cleaning assembly; the cleaning assembly includes a fixed frame fixedly connected to the support frame, and a rotating rod rotatably connected to the fixed frame and the support frame, the front end of the rotating rod extending outside the fixed frame and rotatably connected to the fixed frame. This utility model, by incorporating a cleaning section, solves the problem that, due to the lack of a cleaning structure, when the screen surface is clogged by sand and gravel particles, not only is the effective screening area of ​​the screen significantly reduced, but the flow rate of material through the screen also decreases, thus affecting screening efficiency.

Description

Technical Field

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

[0002] A concrete sand and gravel screening device is a device that uses screens with different apertures to classify and screen sand and gravel raw materials. It can separate sand and gravel into different grades according to particle size. Concrete sand and gravel screening devices are used because the strength, workability and other properties of concrete are closely related to the particle size distribution of sand and gravel. Screening can remove impurities and obtain sand and gravel particles that meet the mix requirements, ensuring stable concrete quality and improving raw material utilization.

[0003] However, existing screening devices lack a cleaning structure. When the screen surface is clogged with sand, gravel, or other material particles, the effective screening area of ​​the screen is greatly reduced, and the flow rate of the material through the screen is also reduced, thus affecting the screening efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a sand and gravel screening device for concrete. By setting up a cleaning section, it solves the problem that when the screen surface is blocked by sand and gravel particles due to the lack of a cleaning structure, not only will the effective screening area of ​​the screen be greatly reduced, but the flow rate of the material through the screen will also be reduced, thus affecting the screening efficiency.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a sand and gravel screening device for concrete, comprising a support frame and further comprising: a cleaning section disposed within the support frame; a feeding section disposed at the top of the support frame; the cleaning section comprising a cleaning assembly mounted on the support frame; and a screening assembly mounted on the cleaning assembly; the cleaning assembly comprising a fixed frame fixedly connected to the support frame, a rotating rod rotatably connected to the fixed frame and the support frame, the front end of the rotating rod extending outside the fixed frame and rotatably connected to the fixed frame, and a plurality of slings sleeved on the outer wall of the rotating rod; wherein, five slings are provided, and each sling consists of three soft belts.

[0007] Furthermore, the unloading section includes an unloading assembly installed on top of the support frame; and a conveying assembly installed inside the support frame. The unloading assembly is located on top of the conveying assembly. By installing the unloading assembly on top of the support frame and the conveying assembly inside the support frame with the unloading assembly located on top of the conveying assembly, the unloading section forms a vertically connected structural layout, allowing the material output by the unloading assembly to fall directly onto the conveying assembly below, thus achieving seamless connection between unloading and conveying of materials.

[0008] Furthermore, the screening assembly includes a motor sleeve fixedly connected to the back of the support frame, a motor is fitted on the motor sleeve, the output shaft of the motor is fixedly connected to a rotating shaft via a coupling, a drum screen is fitted on the outer wall of the rotating shaft, the drum screen is in contact with several spinning belts, and transmission components are provided on the rotating shaft and the rotating rod; wherein, the rotating shaft passes through the support frame and is rotatably connected to the support frame.

[0009] Furthermore, the screening assembly includes a motor sleeve fixedly connected to the back of the support frame. A motor is mounted on the motor sleeve, and the output shaft of the motor is fixedly connected to a rotating shaft via a coupling. A drum screen is mounted on the outer wall of the rotating shaft, and the drum screen contacts several spinning belts. Transmission components are provided on the rotating shaft and the rotating rod. The rotating shaft passes through the support frame and is rotatably connected to it. The screening assembly fixes the motor to the motor sleeve and drives the rotating shaft and the drum screen on its outer wall to rotate via the coupling. Combined with the spinning belts in contact with the drum screen and the transmission components on the rotating shaft and the rotating rod, the stable operation of the drum screen can be achieved by the motor drive. At the same time, the spinning belts enhance the material turning effect during the screening process, improving screening efficiency and uniformity.

[0010] Furthermore, the conveying assembly includes a conveyor belt mounted on a support frame, which is adapted to the drum screen. The conveyor belt is located at the bottom of the drum screen. By mounting a conveyor belt on the support frame that is adapted to the drum screen and located at its bottom, the conveying assembly can directly receive the material after it has been screened by the drum screen, achieving a close connection between the screening and conveying processes. This ensures the smooth flow of material from screening to conveying, preventing material spillage, and also improves the efficiency of material collection and transfer through the adaptive design, which helps to optimize the continuity and practicality of the overall material handling process.

[0011] Furthermore, the transmission component includes toothed pulleys that are both sleeved on the outer wall of the rotating rod and the rotating shaft, and toothed belts are wound around the outer walls of the two toothed pulleys; wherein, the two toothed pulleys and the toothed belts are located on the front of the support frame.

[0012] Furthermore, the agitator includes a stirring roller and a rotating blade, both sleeved on the outer wall of the second rotating shaft. The stirring roller is adapted to the hopper, and the rotating blade is adapted to the discharge pipe. By sleeved on the outer wall of the second rotating shaft with a stirring roller adapted to the hopper and a rotating blade adapted to the discharge pipe, the agitator can both fully agitate the material in the hopper with the stirring roller to prevent it from clumping or accumulating, and guide the material in the discharge pipe with the rotating blade to avoid blockage.

[0013] This utility model has the following beneficial effects:

[0014] 1. By setting up a cleaning section, after sand and gravel enter the drum screen through the feeding pipe, the motor is started and the drum screen is rotated through the rotating shaft. The sand falls through the screen holes and is transported away by the conveyor belt, while the gravel is transported to the outlet. At the same time, the rotating shaft drives the rotating rod to rotate synchronously through the toothed pulley and toothed belt. The swing belt on the rotating rod beats the drum screen to make it vibrate, shake off the clogging impurities, effectively prevent blockage, and ensure continuous and efficient screening.

[0015] 2. By setting up a feeding section, when in use, sand and gravel raw materials are put into the hopper and motor two is started. Motor two drives the mixing roller and rotating blade to rotate through the rotating shaft two. The former stirs the sand and gravel to prevent clumping and facilitate feeding, while the latter feeds the material evenly to prevent the feeding pipe from being blocked, ensuring smooth and uniform feeding and providing a stable supply for subsequent screening.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a partial cross-sectional view of the cleaning part of this utility model;

[0020] Figure 3 This is a partial cross-sectional view of the material feeding section of this utility model;

[0021] Figure 4 This utility model Figure 2 A magnified structural diagram of A in the middle;

[0022] Figure 5 This utility model Figure 2A magnified structural diagram of B in the diagram;

[0023] Figure 6 This utility model Figure 3 A magnified structural diagram of C.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Support frame; 2. Cleaning section; 21. Cleaning assembly; 211. Fixing frame; 212. Rotating rod; 213. Belt conveyor; 22. Screening assembly; 221. Motor sleeve; 222. Motor 1; 223. Rotating shaft 1; 224. Drum screen; 225. Toothed pulley; 226. Toothed belt; 3. Discharge section; 31. Discharge assembly; 311. Hopper; 312. Discharge pipe; 313. Support rod; 314. Motor 2; 315. Rotating shaft 2; 316. Mixing roller; 317. Rotating blade; 32. Conveying assembly; 321. Conveyor belt. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-6 As shown, this utility model is a sand and gravel screening device for concrete, including a support frame 1, and further including: a cleaning part 2, which is disposed inside the support frame 1; and a feeding part 3, which is disposed on the top of the support frame 1.

[0028] The cleaning component 21 includes a fixed frame 211 fixedly connected to the support frame 1. A rotating rod 212 is rotatably connected to the fixed frame 211 and the support frame 1. The front end of the rotating rod 212 extends outside the fixed frame 211 and is rotatably connected to the fixed frame 211. Several spinning belts 213 are sleeved on the outer wall of the rotating rod 212. There are five spinning belts 213, and each spinning belt 213 is composed of three soft belts. The screening component 22 includes a motor sleeve 221 fixedly connected to the back of the support frame 1. A motor 2 is sleeved on the motor sleeve 221. 22. The output shaft of motor 222 is fixedly connected to shaft 223 via a coupling. A drum screen 224 is fitted onto the outer wall of shaft 223. The drum screen 224 contacts several belts 213. Transmission components are installed on shaft 223 and rotating rod 212. Shaft 223 passes through support frame 1 and is rotatably connected to support frame 1. The transmission components include toothed pulleys 225, each fitted onto the outer wall of rotating rod 212 and shaft 223. Toothed belts 226 are wound around the outer walls of two toothed pulleys 225. Both the toothed pulley 225 and the toothed belt 226 are located on the front of the support frame 1. Through the cleaning section 2, the sand and gravel flowing from the discharge pipe 312 enter the drum screen 224. At this time, the motor 222 is started, and the motor 222 drives the drum screen 224 to rotate via the rotating shaft 223. The sand in the sand and gravel falls through the screen holes of the drum screen 224 onto the conveyor belt 321 and is transported away by the conveyor belt 321. The pebbles in the sand and gravel, unable to pass through the screen, are transported by the drum screen 224 to the outlet. Simultaneously, on the rotating shaft... During the rotation of shaft 223, it drives its own toothed pulley 225, which in turn drives the toothed pulley 225 on the rotating rod 212 via the toothed belt 226. This causes the rotating rod 212 and the rotating shaft 223 to rotate synchronously. When the rotating rod 212 rotates, the multiple slings 213 on it beat the surface of the rotating drum screen 224, causing the surface of the drum screen 224 to vibrate and shake off impurities such as stones that are clogging the screen holes. This design effectively prevents the drum screen 224 from clogging and ensures the continuous and efficient operation of the screening process.

[0029] The feeding section 3 includes a feeding assembly 31, which is installed on top of the support frame 1; and a conveying assembly 32, which is installed inside the support frame 1. The feeding assembly 31 is located on top of the conveying assembly 32. The feeding assembly 31 includes a hopper 311 fixedly connected to the support frame 1. A feeding pipe 312 is fixedly connected to the bottom of the hopper 311. A support rod 313 is fixedly connected to the inner wall of the hopper 311. A second motor 314 is fixedly connected to the top of the support rod 313. The output shaft of the second motor 314 is fixedly connected to a second rotating shaft 315 via a coupling. The second rotating shaft 315 passes through the support rod 313 and is rotatably connected to it. An agitator is provided on the second rotating shaft 315. The feeding pipe 312 communicates with the hopper 311. The conveying assembly 32 includes a conveyor belt 321 mounted on the support frame 1, which is adapted to the drum screen 224. The conveyor belt 321 is located at the bottom of the drum screen 224. The agitator includes a stirring roller 316 and a rotating blade 317, both sleeved on the outer wall of the second rotating shaft 315. The stirring roller 316 is adapted to the hopper 311, and the rotating blade 317 is adapted to the discharge pipe 312. By setting the discharge section 3, the sand and gravel raw materials to be screened can be put into the hopper 311 during use. Then, the second motor 314 is started. The second motor 314 will drive the stirring roller 316 and the rotating blade 317 to rotate synchronously through the second rotating shaft 315. When the stirring roller 316 rotates, it can agitate the sand and gravel in the hopper 311 to prevent them from clumping together and affecting the discharge. When the rotating blade 317 rotates, it can evenly transport the sand and gravel into the discharge pipe 312 to prevent the sand and gravel from rushing into the discharge pipe 312 and causing blockage. Through this setting, the discharge of sand and gravel raw materials can be ensured to be smooth and uniform, providing a stable material supply for the subsequent screening process.

[0030] A specific application of this embodiment is as follows: During use, the sand and gravel raw material to be screened can be placed into the hopper 311. Then, motor 314 is started, and motor 314 synchronously drives the stirring roller 316 and rotating blade 317 to rotate via shaft 315. When the stirring roller 316 rotates, it agitates the sand and gravel in the hopper 311, preventing them from clumping and affecting the feeding. When the rotating blade 317 rotates, it evenly conveys the sand and gravel into the discharge pipe 312, preventing sand and gravel from rushing into the discharge pipe 312 and causing blockage. This setting ensures smooth and uniform feeding of the sand and gravel raw material, providing a stable material supply for subsequent screening. The sand and gravel flowing out of the discharge pipe 312 enters the drum screen 224. At this time, motor 222 is started, and motor 222 drives the drum screen 224 via shaft 223. As the drum screen 224 rotates, sand in the gravel falls through the screen holes onto the conveyor belt 321 and is transported away by the conveyor belt 321. Stones in the gravel, unable to pass through the screen, are transported to the outlet by the drum screen 224. Simultaneously, as the rotating shaft 223 rotates, it drives its toothed pulley 225, which in turn drives the toothed pulley 225 on the rotating rod 212 via the toothed belt 226. This causes the rotating rod 212 to rotate synchronously with the rotating shaft 223. When the rotating rod 212 rotates, its multiple slings 213 strike the surface of the rotating drum screen 224, causing vibration and shaking off stones and other impurities clogging the screen holes. This design effectively prevents clogging of the drum screen 224, ensuring continuous and efficient screening.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sand and gravel screening device for concrete, comprising a support frame (1), characterized in that, Also includes: Cleaning section (2), which is disposed inside the support frame (1); The material feeding section (3) is located on the top of the support frame (1); The cleaning unit (2) includes a cleaning component (21) which is mounted on the support frame (1); as well as Screening assembly (22), which is mounted on cleaning assembly (21); The cleaning assembly (21) includes a fixed frame (211) fixedly connected to the support frame (1), and a rotating rod (212) rotatably connected to the fixed frame (211) and the support frame (1). The front end of the rotating rod (212) extends to the outside of the fixed frame (211) and is rotatably connected to the fixed frame (211). A plurality of slings (213) are sleeved on the outer wall of the rotating rod (212). Among them, there are five swivel belts (213), and each swivel belt (213) consists of three soft leather belts.

2. The sand and gravel screening device for concrete according to claim 1, characterized in that, The feeding section (3) includes a feeding assembly (31), which is mounted on the top of the support frame (1); and A conveying assembly (32) is installed inside a support frame (1); The feeding assembly (31) is located on top of the conveying assembly (32).

3. The sand and gravel screening device for concrete according to claim 2, characterized in that, The screening assembly (22) includes a motor sleeve (221) fixedly connected to the back of the support frame (1). A motor (222) is fitted on the motor sleeve (221). The output shaft of the motor (222) is fixedly connected to a rotating shaft (223) via a coupling. A drum screen (224) is fitted on the outer wall of the rotating shaft (223). The drum screen (224) is in contact with several spinning belts (213). Transmission components are provided on the rotating shaft (223) and the rotating rod (212). Among them, the rotating shaft (223) passes through the support frame (1) and is rotatably connected to the support frame (1).

4. A sand and gravel screening device for concrete according to claim 3, characterized in that, The feeding assembly (31) includes a hopper (311) fixedly connected to the support frame (1), a feeding pipe (312) fixedly connected to the bottom of the hopper (311), a support rod (313) fixedly connected to the inner wall of the hopper (311), a motor (314) fixedly connected to the top of the support rod (313), a rotating shaft (315) fixedly connected to the output shaft of the motor (314) through a coupling, the rotating shaft (315) passing through the support rod (313) and rotatably connected to the support rod (313), and an agitator is provided on the rotating shaft (315). The feed pipe (312) is connected to the hopper (311).

5. A sand and gravel screening device for concrete according to claim 4, characterized in that, The conveying assembly (32) includes a conveyor belt (321) disposed on a support frame (1), the conveyor belt (321) being adapted to the drum screen (224); The conveyor belt (321) is located at the bottom of the drum screen (224).

6. A sand and gravel screening device for concrete according to claim 5, characterized in that, The transmission component includes toothed pulleys (225) that are sleeved on the outer walls of the rotating rod (212) and the rotating shaft (223), and toothed belts (226) are wound around the outer walls of the two toothed pulleys (225). The two toothed pulleys (225) and the toothed belt (226) are located on the front of the support frame (1).

7. A sand and gravel screening device for concrete according to claim 6, characterized in that, The agitator includes a stirring roller (316) and a rotating blade (317) both sleeved on the outer wall of the rotating shaft (315). The stirring roller (316) is adapted to the hopper (311), and the rotating blade (317) is adapted to the feed pipe (312).

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