Recycled concrete aggregate screening device

Abstract

The utility model provides a recycled concrete aggregate screening device, and belongs to the technical field of concrete regeneration. The recycled concrete aggregate screening device comprises a supporting mechanism and a funnel welded to the inner wall of the supporting mechanism, a screening mechanism is installed on the surface of the supporting mechanism and composed of a screening piece, elastic pieces and a vibrating piece, the elastic pieces are installed at the two ends of the screening piece through bolts and suspended on the funnel, and the bottom ends of the elastic pieces are fixedly connected with the surface of the supporting mechanism. The fixed end of the vibrating part is in bolted connection with the surface of the screening part, and the output end is connected with the inner side wall of the screening part. According to the recycled concrete aggregate screening device, the screening piece, the elastic piece and the vibrating piece are combined and are inclined, recycled concrete aggregate can be effectively screened, the screening efficiency is improved, and therefore the production efficiency is improved. And the screening net adopts a quick replacement design, so that a worker can conveniently replace the screening net which is worn or blocked due to long-term use.

Description

Technical Field

[0001] This application relates to the technical field of recycled concrete aggregates, and more particularly, to a screening device for recycled concrete aggregates. Background Art

[0002] With the acceleration of the urbanization process and the booming development of the construction industry, the generation volume of construction waste has been increasing year by year, and waste concrete aggregates account for a quite large proportion. If these waste concrete aggregates are directly discarded without treatment, they will not only occupy land resources but also cause serious environmental pollution. Therefore, developing an efficient and environmentally friendly screening device for recycled concrete aggregates is of great significance for realizing the resource utilization of construction waste and reducing environmental pollution.

[0003] Traditional screening devices for recycled concrete aggregates often adopt a single screening method during the screening process, such as vibrating screening or rolling screening. Although this screening method is simple, there are some problems in practical applications. First, since recycled concrete aggregates often contain a large amount of impurities, such as soil, wood blocks, plastics, etc., these impurities are easily attached to the sieve mesh, resulting in sieve mesh blockage and affecting the screening efficiency. To maintain the normal operation of screening, it is necessary to regularly clean and maintain the sieve mesh, such as cleaning and replacement. However, due to the complex operation and high cost of replacing the sieve mesh, it brings inconvenience to actual production and also reduces production efficiency. Second, if the vibration frequency and amplitude of existing screening devices for recycled concrete aggregates are set improperly, it will affect the screening effect; if the aperture size of the screening mesh is not reasonably selected, it will lead to uneven screening of aggregates. Utility Model Content

[0004] To make up for the above deficiencies, this application provides a screening device for recycled concrete aggregates to solve the problems raised in the above background art.

[0005] To achieve the above object, the technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A screening device for recycled concrete aggregates includes a support mechanism and a funnel welded to the inner wall of the support mechanism. A screening mechanism is installed on the surface of the support mechanism. The screening mechanism consists of a screening member, an elastic member, and a vibrating member. The two ends of the screening member are bolted with the elastic member and are suspended on the funnel. The bottom end of the elastic member is fixedly connected to the surface of the support mechanism. The fixed end of the vibrating member is bolted to the surface of the screening member, and the output end is connected to the inner side wall of the screening member.

[0007] Further, the screening member includes a top plate, two side plates, a bottom frame, an insertion port, a plurality of limiting blocks, a tension frame, a screening mesh, a cross plate, and two handles. The insertion port is provided on the outer wall of the top plate. One ends of the two side plates are respectively welded to both sides of the inner wall of the top plate. The side walls of the bottom frame are respectively welded to the top plate and the inner walls of the two side plates. A plurality of the limiting blocks are respectively welded at equal intervals on the opposite ends of the two side plates. One end of the tension frame is fixedly connected to the cross plate, and the other end is inserted into the insertion port, and the surface thereof is in contact with the inner tops of the plurality of limiting blocks, and the bottom is in contact with the surface of the bottom frame. The side wall of the screening mesh is fixedly embedded inside the tension frame. The inner wall of the cross plate is in contact with the outer wall of the top plate. The bottom ends of the two handles are respectively fixedly connected to both ends of the outer wall of the cross plate.

[0008] Further, the elastic member includes four load-bearing blocks, four groups of telescopic rods, four groups of springs, four limiting cylinders, and two connecting rollers. The bottom ends of the four load-bearing blocks are respectively welded to the four corners of the surface of the support mechanism. The two ends of the four groups of telescopic rods are respectively fixedly connected to the opposite ends of the four load-bearing blocks and the four limiting cylinders. The four groups of springs are respectively sleeved on the outer walls of the four groups of telescopic rods. The inner walls of the four limiting cylinders are respectively in close contact with both ends of the outer walls of the two connecting rollers. Both ends of the two connecting rollers respectively penetrate through both ends of the two side plates and are bolted to their inner walls.

[0009] Further, the vibrating member includes a mounting plate, a servo motor, a transmission rod, two base shafts, a driving wheel, a driven wheel, a transmission belt, two bearings, a rotating roller, and two centrifugal blocks. The two bottom ends of the mounting plate are respectively bolted to the surfaces of the two side plates. The servo motor and the two base shafts are mounted on the surface of the mounting plate. The outer wall of the transmission rod is connected to the inner walls of the two base shafts, and one end is fixedly connected to the output end of the servo motor, and the other end is welded to the side wall of the driving wheel. The side wall of the driven wheel is welded to one end of the rotating roller. The transmission belt is sleeved on the driving wheel and the driven wheel. The two bearings are respectively fixedly embedded in the side walls of the two side plates. The outer wall of the rotating roller is fixedly connected to the inner walls of the two bearings, and both ends are respectively provided with the two centrifugal blocks.

[0010] Further, the support mechanism includes two side rods, four support legs, and a reinforcing rod. The opposite ends of the two side rods are respectively welded to both sides of the funnel, and four load-bearing blocks are welded on the surface. The reinforcing rod is welded between the four support legs, and the top ends are respectively welded to both bottom ends of the two side rods.

[0011] The utility model has the following beneficial effects:

[0012] 1. The utility model adopts a combination of a screening member, an elastic member and a vibrating member, and presents an inclined shape, which can effectively screen recycled concrete aggregates, improve the screening efficiency, and thus improve the production efficiency.

[0013] 2. The modular design of the screening member of the utility model, especially through the combination of the insertion interface and the tension frame, makes the replacement of the screening mesh simple and fast. When the screening mesh is worn or blocked due to long-term use, the staff can quickly replace the new screening mesh, reducing the downtime for maintenance and improving the production efficiency.

[0014] 3. The introduction of the elastic member of the utility model, through the combination of related parts such as the telescopic rod and the spring, enables the screening member to be adaptively adjusted according to different aggregates and screening requirements. When the amount of aggregates is large or there are many impurities, the screening member can be appropriately deformed under the action of the elastic member, so as to maintain the stability and efficiency of screening.

[0015] 4. The utility model adopts a vibrating member, especially the design of a servo motor and a transmission system (including a driving wheel, a driven wheel and a transmission belt), which can realize strong vibration of the screening member, so as to effectively separate impurities in the aggregates and improve the screening efficiency. At the same time, the design of the centrifugal block increases the rotational stability of the rotating roller, further ensuring the screening effect.

[0016] 5. The operation of the screening device of the utility model is simple and easy to understand. The staff only needs to start the servo motor and control the feeding amount of the aggregates to achieve automatic screening. At the same time, the design of the handle facilitates the staff to move and replace the screening member. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of a recycled concrete aggregate screening device provided by an embodiment of the present application;

[0019] Figure 2 It is a schematic labeled structural diagram of a recycled concrete aggregate screening device provided by an embodiment of the present application;

[0020] Figure 3 It is a schematic partial structural diagram of a screening member provided by an embodiment of the present application.

[0021] In the figure: 1 - support mechanism; 2 - screening mechanism; 3 - funnel; 21 - screening member; 22 - elastic member; 23 - vibrating member; 211 - top plate; 212 - side plate; 213 - bottom frame; 214 - insertion interface; 215 - limit block; 216 - tension frame; 217 - screening mesh; 218 - cross plate; 219 - handle; 221 - load-bearing block; 222 - telescopic rod; 223 - spring; 224 - limiting cylinder; 225 - connecting roller; 231 - mounting plate; 232 - servo motor; 233 - transmission rod; 234 - base shaft; 235 - driving wheel; 236 - driven wheel; 237 - transmission belt; 238 - bearing; 239 - rotating roller; 2391 - centrifugal block; 11 - side rod; 12 - support leg; 13 - reinforcing rod. Detailed implementation manner

[0022] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0023] Embodiment:

[0024] Please refer to Figure 1 、 Figure 2 , a recycled concrete aggregate screening device, including a support mechanism 1 and a funnel 3 welded to the inner wall of the support mechanism 1. The support mechanism 1 includes two side rods 11, four support legs 12 and a reinforcing rod 13.

[0025] Among them, the support mechanism 1 serves as the foundation and support part of the entire screening device, and its design and stability are crucial for ensuring the normal operation of the screening device. The two side rods 11, as the main frame part of the support mechanism 1, need to consider sufficient strength and stability in their design. The opposite ends of the side rods 11 are respectively welded to both sides of the funnel 3 to ensure the stable installation of the funnel 3. Four load-bearing blocks 221 are also welded to the surface of the side rods 11. These load-bearing blocks 221 not only support the screening mechanism 2 but also are connected to the screening member 21 through the elastic member 22 to provide the elastic support required during the screening process. Reinforcing plates or ribs are added at the connection between the side rods 11 and the support legs 12 to improve the strength and stability of the structure. At the same time, anti-slip pads or fixing devices can also be added to the bottom of the support legs 12 to prevent the screening device from sliding or moving during operation. The reinforcing rod 13 is located between the four support legs 12 and is welded to the support legs 12 to form a stable triangular structure. The introduction of the reinforcing rod 13 can significantly increase the stability and load-bearing capacity of the support mechanism 1, preventing shaking or deformation caused by the impact of aggregates during the screening process.

[0026] Among them, the funnel 3 is a crucial component located on the inner wall of the support mechanism 1 and is used to receive and guide the screened aggregate. The inclination angle of the funnel 3 has an important impact on the flow rate and smoothness of the aggregate. An appropriate inclination angle can ensure that the aggregate smoothly flows onto the conveyor belt.

[0027] Please refer to Figure 1 、 Figure 2 、 Figure 3 , a recycled concrete aggregate screening device, including a screening mechanism 2 installed on the surface of the support mechanism 1. The screening mechanism 2 consists of a screening member 21, an elastic member 22, and a vibrating member 23. The screening member 21 includes a top plate 211, two side plates 212, a bottom frame 213, an insertion port 214, a number of limit blocks 215, a tension frame 216, a screening mesh 217, a cross plate 218, and two handles 219; the elastic member 22 includes four load-carrying blocks 221, four groups of telescopic rods 222, four groups of springs 223, four limit cylinders 224, and two connecting rollers 225; the vibrating member 23 includes a mounting plate 231, a servo motor 232, a transmission rod 233, two base shafts 234, a driving wheel 235, a driven wheel 236, a transmission belt 237, two bearings 238, a rotating roller 239, and two centrifugal blocks 2391.

[0028] Among them, the screening member 21 is the core component for realizing the screening function of concrete aggregates. The top plate 211 is the top structure of the screening member 21, and an insertion port 214 is provided on its outer wall for connecting with the tension frame 216. A number of limit blocks 215 are welded to the opposite ends of the side plates 212 for limiting the tension frame 216. The bottom frame 213 is located at the bottom of the screening member 21 and is welded to the top plate 211 and the two side plates 212 to form the bottom support structure of the screening member 21. The surface of the bottom frame 213 is in contact with the bottom of the tension frame 216 to ensure the flatness and stability of the screening mesh 217. The design of the insertion port 214 facilitates the insertion of one end of the tension frame 216, realizing the quick installation and disassembly of the screening mesh 217. The tension frame 216 is the support structure of the screening mesh 217. One end of it is welded to the cross plate 218, and the other end is inserted into the insertion port 214, so that the tension frame 216 is in contact with the inner top of the limit blocks 215 and the surface of the bottom frame 213 to ensure the stability of the screening mesh 217. The screening mesh 217 is the main working component of the screening member 21, and its side wall is fixed inside the tension frame 216. The mesh size of the screening mesh 217 is determined according to the aggregate screening requirements to realize the separation of aggregates with different particle sizes. The cross plate 218 is located on the outer wall of the top plate 211 to form a closed structure to prevent concrete bone powder from leaking from the insertion port 214. Both ends of the outer wall of the cross plate 218 are fixedly connected to the two handles 219, which is convenient for the operator to carry and replace the screening mesh 217. Threaded holes are provided on the surfaces of a number of limit blocks 215. By screwing a bolt into the threaded hole and pressing against the tension frame 216, the tension frame 216 can be prevented from displacing during vibration.

[0029] Among them, the elastic member 22 plays an important role in providing elastic support for the screening member 21 and ensuring the screening effect. The load-carrying blocks 221 are located at the four corners of the surface of the support mechanism 1 and are fixed by welding. They serve as the fixed points of the elastic system and bear the weight of the screening member 21 and the vibrations generated during the screening process. The combination of the telescopic rods 222, the limiting cylinders 224, and the load-carrying blocks 221 provides stable support and guidance, ensuring the stability of the spring 223 during compression and extension. By adjusting the specifications and quantities of the springs 223, the magnitude of the elastic force can be adjusted according to different screening requirements to meet the needs of different aggregates and screening precisions. The inner wall of the limiting cylinder 224 is in close fit with the outer wall of the connecting roller 225, playing a role in restricting the movement range of the connecting roller 225. At the same time, they also provide installation and fixing spaces for the telescopic rods 222 and the springs 223. Both ends of the connecting roller 225 penetrate through both ends of the two side plates 212 and are connected to the inner walls of the side plates 212 by bolts. They connect the elastic member 22 to the screening member 21, ensuring that the screening member 21 can receive the elastic support of the elastic member 22. The elastic member 22 is composed of a small number of components, with a simple structure and being easy to install and maintain.

[0030] Among them, the vibrating member 23 provides continuous and stable vibration for the recycled concrete aggregate screening device through its unique design and function. The mounting plate 231, as the support structure of the vibrating member 23, is connected to the surfaces of the two side plates 212 by bolts at both ends of its bottom, ensuring the stable installation of the servo motor 232. The servo motor 232 is installed on the surface of the mounting plate 231 and serves as the power source of the vibrating member 23. By controlling the rotation speed and direction of the servo motor, the vibration frequency and amplitude of the screening member 21 can be adjusted to meet the requirements of different aggregates and screening accuracies. The transmission rod 233 is connected to the mounting plate 231 through the base shaft 234. One end of it is fixedly connected to the output end of the servo motor 232, and the other end is welded to the side wall of the driving wheel 235. The transmission rod 233 transmits the power of the servo motor 232 to the driving wheel 235, driving it to rotate. The driving wheel 235 and the driven wheel 236 are connected by a transmission belt 237 to form a transmission system. The driving wheel 235 rotates under the drive of the servo motor and drives the driven wheel 236 to rotate synchronously through the transmission belt 237. The transmission belt 237 is sleeved on the driving wheel 235 and the driven wheel 236, playing a role in transmitting power. By selecting the appropriate material and tooth profile of the transmission belt, the stability and efficiency of the transmission system can be ensured. The two bearings 238 are respectively embedded in the side walls of the two side plates 212, providing support and guidance for the rotating roller 239. The design of the bearing 238 should take into account the rotation speed and load requirements of the rotating roller 239 to ensure its stability and durability. The rotating roller 239 is connected to the side plate 212 through the bearing 238, and one end of it is welded to the side wall of the driven wheel 236. The rotating roller 239 rotates under the drive of the driven wheel 236, generating centrifugal force. The centrifugal blocks 2391 are fixed at both ends of the rotating roller 239, and the centrifugal force generated by rotation acts on the screening member 21, causing the screening member 21 to vibrate. The material and weight of the centrifugal blocks 2391 can be adjusted according to the screening requirements to optimize the vibration effect.

[0031] Working principle of the recycled concrete aggregate screening device: When screening concrete, by starting the servo motor 232, it drives the transmission rod 233 to rotate. The transmission rod 233 drives the driving wheel 235 to rotate, and through the transmission of the transmission belt 237, the driven wheel 236 also rotates synchronously. The rotation of the driven wheel 236 drives the rotation of the rotating roller 239. The centrifugal blocks 2391 at both ends of the rotating roller 239 generate centrifugal force due to rotation. These centrifugal forces act on the screening member 21, causing it to vibrate. The frequency and intensity of the vibration can be controlled by adjusting the rotation speed and direction of the servo motor 232. At this time, the telescopic rod 222 and the spring 223 installed between the load block 221 and the limiting cylinder 224 elastically support the screening member 21, ensuring that the screening member 21 can maintain a certain stability and screening accuracy during vibration. The concrete aggregate enters the inside of the screening member 21. The screening mesh 217 inside the screening member 21 screens the raw materials according to the set particle size distribution requirements. Under the vibration generated by the vibrating member 23, the raw materials jump and roll on the screening mesh 217, enabling the raw materials with a particle size smaller than the sieve holes to smoothly pass through the screening mesh 217 and enter the funnel 3, while the raw materials with a larger particle size are left on the screening mesh 217. Due to its inclined shape, it can be quickly discharged.

[0032] It should be noted that the specific model specifications of the screening mesh 217, the telescopic rod 222, the spring 223, the servo motor 232, the transmission belt 237, and the centrifugal block 2391 need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0033] The power supply and principle of the servo motor 232 are clear to those skilled in the art and will not be elaborated here.

[0034] For those skilled in the art, it is obvious that this application is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of this application, this application can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of this application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed in this application. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A recycled concrete aggregate screening device, comprising a support mechanism (1) and a funnel (3) welded to the inner wall of the support mechanism (1), characterized in that: A screening mechanism (2) is mounted on the surface of the support mechanism (1), the screening mechanism (2) comprising a screening element (21), an elastic element (22) and a vibrating element (23), the elastic elements (22) being bolted to both ends of the screening element (21) and suspended on the funnel (3), the bottom end of the elastic element (22) being fixedly connected to the surface of the support mechanism (1), the fixed end of the vibrating element (23) being bolted to the surface of the screening element (21), and the output end being connected to the inner wall of the screening element (21).

2. A recycled concrete aggregate screening device according to claim 1, characterized in that: The screening element (21) comprises a top plate (211), two side plates (212), a bottom frame (213), an insertion port (214), a plurality of limit blocks (215), a tension frame (216), a screening net (217), a horizontal plate (218) and two handles (219); the insertion port (214) is provided on an outer wall of the top plate (211); one end of the two side plates (212) are respectively welded to two sides of an inner wall of the top plate (211); the side walls of the bottom frame (213) are respectively welded to the top plate (211) and the inner walls of the two side plates (212); the plurality of limit blocks (215) are respectively welded to the inner walls of the top plate (211) and the two side plates (212); The tension frame (216) is welded to the opposite ends of the two side plates (212) at equal intervals. One end of the tension frame (216) is fixedly connected to the transverse plate (218), and the other end is plugged into the plug port (214). The surface is in contact with the top of the plurality of limit blocks (215), and the bottom is in contact with the surface of the bottom frame (213). The side wall of the screening net (217) is embedded in the tension frame (216). The inner wall of the transverse plate (218) is in contact with the outer wall of the top plate (211). The bottom ends of the two handles (219) are fixedly connected to the two ends of the outer wall of the transverse plate (218).

3. A recycled concrete aggregate screening device according to claim 2, characterized in that: The elastic member (22) comprises four load-bearing blocks (221), four groups of telescopic rods (222), four groups of springs (223), four limiting cylinders (224) and two connecting rollers (225); the bottom ends of the four load-bearing blocks (221) are respectively welded to the four corners of the surface of the supporting mechanism (1); the two ends of the four groups of telescopic rods (222) are respectively fixedly connected to the opposite ends of the four load-bearing blocks (221) and the four limiting cylinders (224); the four groups of springs (223) are respectively sleeved on the outer walls of the four groups of telescopic rods (222); the inner walls of the four limiting cylinders (224) are respectively tightly fitted to the two ends of the outer walls of the two connecting rollers (225); and the two ends of the two connecting rollers (225) respectively pass through the two ends of the two side plates (212) and are bolted to the inner walls thereof.

4. A recycled concrete aggregate screening device according to claim 3, characterized in that: The vibrating member (23) comprises a mounting plate (231), a servo motor (232), a transmission rod (233), two base shafts (234), a driving wheel (235), a driven wheel (236), a transmission belt (237), two bearings (238), a rotating roller (239) and two centrifugal blocks (2391); the two ends of the bottom of the mounting plate (231) are respectively connected to the surfaces of the two side plates (212) with bolts; the servo motor (232) and the two base shafts (234) are mounted on the surface of the mounting plate (231); the outer wall of the transmission rod (233) is connected to the two side plates (212) with bolts; The base shaft (234) is connected to the inner wall, and one end is fixedly connected to the output end of the servo motor (232), and the other end is welded to the side wall of the driving wheel (235). The side wall of the driven wheel (236) is welded to one end of the rotating roller (239). The transmission belt (237) is sleeved on the driving wheel (235) and the driven wheel (236). The two bearings (238) are respectively embedded in the side walls of the two side plates (212). The outer wall of the rotating roller (239) is fixedly connected to the inner walls of the two bearings (238), and the two ends are respectively provided with two centrifugal blocks (2391).

5. A recycled concrete aggregate screening device according to claim 4, characterized in that: The support mechanism (1) comprises two side bars (11), four support legs (12) and a reinforcement bar (13); the opposite ends of the two side bars (11) are respectively welded to the two sides of the funnel (3), and the four loading blocks (221) are welded on the surface; the reinforcement bar (13) is welded between the four support legs (12), and the top end is respectively welded to the two ends of the bottom of the two side bars (11).

Images