A pre-treatment device for surface strengthening treatment of recycled aggregates

Abstract

The utility model relates to a kind of pretreatment device of recycled aggregate surface strengthening treatment, belong to recycled aggregate processing technical field.The pretreatment device of recycled aggregate surface strengthening treatment, it includes: drum-type screening machine;Spray cleaning mechanism, the spray cleaning mechanism includes support frame and water tank, the liquid outlet end of the water tank is fixedly connected and is communicated with infusion pump;Spray cleaning mechanism is cooperatively designed by liquid guide hopper and spray head, high-pressure water flow is used to flush screen hole from outside to inside, remove adhered dirt and blocked material, ensure that screen hole continues to be unobstructed;Liquid flow divider distributes water flow to more than ten spray heads evenly, expands cleaning coverage;Inverted right-angle hexagonal liquid guide hopper restrains water flow splashing and pushes and pushes extended material back to inside screen cylinder, reduces secondary plugging risk;Rolling brush removes surface dirt synchronously when screen cylinder rotates, cooperates with arc-shaped shielding cover to prevent dirt splashing, significantly improves subsequent washing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of recycled aggregate processing technology, and in particular to a pretreatment device for surface strengthening treatment of recycled aggregate. Background Technology

[0002] Surface strengthening technology for recycled aggregates enhances their engineering properties through methods such as physical grinding, chemical coating, or carbonization. The pretreatment stage utilizes a drum screen, combined with a screen grading and spraying system, which effectively reduces the aggregate's water absorption and dust content, creating favorable conditions for subsequent strengthening processes. Ultimately, this enables the recycled aggregates to meet the high-standard engineering application requirements of high-strength concrete and other applications.

[0003] However, the sharp edges of the crushed recycled aggregate make it prone to jamming when passing through the screen; at the same time, the water absorption during the spraying process will significantly increase the surface viscosity of the aggregate. This adhesion effect and the interaction with the geometry further aggravate the screening resistance, seriously affecting the pretreatment efficiency and equipment stability. Utility Model Content

[0004] Therefore, it is necessary to provide a pretreatment device for surface strengthening treatment of recycled aggregates, which addresses the problem that existing drum screens equipped with spray systems are prone to clogging aggregates and reducing the efficiency of recycled aggregate processing.

[0005] A pretreatment apparatus for surface strengthening treatment of recycled aggregate includes: Drum screener; The spray cleaning mechanism includes a support frame and a water tank. The outlet end of the water tank is fixedly connected to and connected to a liquid pump. The outlet end of the liquid pump is fixedly connected to and connected to a liquid guide pipe. The liquid guide pipe is fixedly connected to the surface of the support frame, and the outlet end of the liquid guide pipe faces the upper surface of the screen cylinder of the drum screener.

[0006] In one embodiment, the liquid outlet end of the liquid guide pipe is fixedly connected to and communicates with a nozzle, and the liquid outlet end of the nozzle faces the screen cylinder of the drum screener.

[0007] In one embodiment, the number of nozzles is not less than ten, the liquid outlet end of the liquid guide tube is fixedly connected to and communicates with a liquid distributor, and the nozzle is fixedly connected to and communicates with the liquid outlet end of the liquid distributor.

[0008] In one embodiment, a liquid guide hopper is fixedly connected to the surface of the support frame, the nozzle is disposed inside the liquid guide hopper, and the bottom of the liquid guide hopper is in no pressure contact with the screen cylinder of the drum screener.

[0009] In one embodiment, the vertical cross-sectional shape of the inner side of the liquid guide hopper is an inverted right-angled hexagon, and the width of the lower opening of the liquid guide hopper is greater than the diameter of the nozzle.

[0010] In one embodiment, the spray cleaning mechanism further includes an enhanced cleaning component, which includes a roller brush rotatably connected to the lower surface of the liquid guide hopper, the lower surface of the roller brush being in pressure contact with the upper surface of the screen cylinder of the drum screener.

[0011] In one embodiment, the number of roller brushes is two, and the two roller brushes are symmetrically distributed on both sides of the centerline of the liquid distributor.

[0012] In one embodiment, a shield is rotatably connected to the surface of the roller brush, one end of which is fixedly connected to the liquid guide hopper, and the vertical cross-sectional shape of the shield is an arc shape with the opening facing the screen cylinder of the drum screener.

[0013] Beneficial effects The pretreatment device for surface strengthening of recycled aggregates described above features a spray cleaning mechanism that uses a coordinated design of a liquid guide bucket and nozzles to flush the screen holes from the outside in with high-pressure water flow, removing adhering dirt and clogging materials to ensure continuous unobstructed flow. A liquid distributor evenly distributes water flow to more than ten nozzles, expanding the cleaning coverage area. An inverted right-angled hexagonal liquid guide bucket suppresses water splashing and pushes extended materials back into the screen cylinder, reducing the risk of secondary clogging. A roller brush removes surface dirt simultaneously as the screen cylinder rotates, and an arc-shaped shield prevents dirt from splashing, significantly improving the efficiency of subsequent rinsing. The enhanced cleaning components feature a symmetrical dual-roller brush layout that achieves dynamic self-cleaning through pressure contact with the screen cylinder, effectively reducing dirt adhesion. The arc-shaped structure of the shield prevents dirt from rotating and splashing, and combined with the water flow guiding function of the liquid guide hopper, it significantly reduces the probability of dust pollution in the working area. At the same time, the linkage design of the spray system and mechanical cleaning effectively reduces screening resistance and significantly improves the stability of continuous equipment operation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of the spray cleaning mechanism in this utility model; Figure 3 This is a partial structural diagram of the spray cleaning mechanism in this utility model; Figure 4 for Figure 3 Schematic sectional view along the middle AA direction; Figure 5 for Figure 3 Schematic sectional view along the middle BB direction.

[0016] Figure label: 100. Drum screener; 200. Spray cleaning mechanism; 210. Support frame; 220. Water tank; 230. Infusion pump; 240. Liquid guide pipe; 250. Nozzle; 260. Liquid distributor; 270. Liquid guide hopper; 280. Enhanced cleaning components; 281. Roller brush; 282. Shielding cover. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The following is combined Figure 1 - Figure 5 This invention describes a pretreatment apparatus for surface strengthening treatment of recycled aggregates.

[0019] In one embodiment, a pretreatment apparatus for surface strengthening treatment of recycled aggregate includes: 100 drum screener; The spray cleaning mechanism 200 includes a support frame 210 and a water tank 220. The outlet end of the water tank 220 is fixedly connected to and connected to a liquid pump 230. The outlet end of the liquid pump 230 is fixedly connected to and connected to a liquid guide pipe 240. The liquid guide pipe 240 is fixedly connected to the surface of the support frame 210, with its outlet end facing the upper surface of the screen cylinder of the drum screen 100. Through the coordinated design of the liquid guide hopper 270 and the spray nozzles 250, the spray cleaning mechanism 200 uses high-pressure water flow to flush the screen holes from the outside in, removing adhering dirt and clogging materials, ensuring continuous unobstructed flow through the screen holes. A liquid distributor 260 evenly distributes the water flow to more than ten spray nozzles 250, expanding the cleaning coverage area.

[0020] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the outlet end of the liquid guide pipe 240 is fixedly connected to and communicates with a nozzle 250. The outlet end of the nozzle 250 faces the screen cylinder of the drum screen 100. The nozzle 250 can increase the flow rate of the cleaning water sprayed onto the screen cylinder of the drum screen 100, further improving the cleaning effect on the screen holes. There are no fewer than ten nozzles 250. The outlet end of the liquid guide pipe 240 is fixedly connected to and communicates with a liquid distributor 260. The nozzles 250 are fixedly connected to and communicate with the outlet end of the liquid distributor 260. This can expand the cleaning range of the screen cylinder of the drum screen 100, thereby improving the cleaning effect on the screen cylinder of the drum screen 100. A liquid guide hopper 270 is fixedly connected to the surface of the support frame 210. The nozzle 250 is located inside the liquid guide hopper 270. The bottom of the liquid guide hopper 270 has no pressure contact with the screen cylinder of the drum screen 100. The vertical cross-section of the inner side of the liquid guide hopper 270 is an inverted right-angled hexagon. The width of the lower opening of the liquid guide hopper 270 is greater than the diameter of the nozzle 250. The liquid guide hopper 270 can not only effectively limit the water sprayed by the nozzle 250 on the surface of the screen cylinder of the drum screen 100 to splash in all directions, so as to reduce the probability of pollution to the surrounding environment, but also push the material that extends out of the screen holes into the screen cylinder, so as to reduce the difficulty of subsequent water rinsing.

[0021] like Figure 3 and Figure 4 As shown, the spray cleaning mechanism 200 also includes a reinforced cleaning component 280, which includes a roller brush 281 rotatably connected to the lower surface of the liquid guide hopper 270. The lower surface of the roller brush 281 is in pressure contact with the upper surface of the screen cylinder of the drum screen 100. There are two roller brushes 281, which are symmetrically distributed on both sides of the axis of the liquid distributor 260. A shield 282 is rotatably connected to the surface of the roller brush 281. One end of the shield 282 is fixedly connected to the liquid guide hopper 270. The vertical cross-sectional shape of the shield 282 is an arc shape with the opening facing the screen cylinder of the drum screen 100. The shield 282 can prevent the roller brush 281 from carrying dirt and rotating and splashing in all directions, further reducing the probability of pollution to the surrounding environment.

[0022] In this embodiment, during the rotation of the drum screen 100, the drum screen 100 synchronously drives the roller brush 281 to rotate. The rotating roller brush 281 sweeps away the dirt adhering to the surface of the drum screen 100, which can effectively reduce the adhesion of dirt on the drum screen 100, making subsequent water rinsing easier.

[0023] The drum screen 100 includes, but is not limited to, the following structures: Support and drive: The frame is made of welded steel and is installed at an angle on the idler rollers. It is equipped with a hydraulic angle adjustment device and a discharge hopper is provided on the inner side of the frame. The motor drives the screen cylinder through a reducer, which drives a large gear or chain.

[0024] Shaftless screen cylinder: It adopts an open cylindrical design without the obstruction of a central shaft. The tilt angle of the cylinder is adjustable from 5° to 15°. It has 3-5 layers of screens (with decreasing aperture size). The screens are made of wear-resistant woven metal wire or perforated steel plate. The overall sealed design prevents dust from overflowing.

[0025] The process of recycled aggregate screening is as follows: The material crushed by the jaw crusher is fed into the screen cylinder. The liquid pump 230 delivers water from the water tank 220 to the liquid guide pipe 240. The liquid guide pipe 240 guides the water into the liquid distributor 260. The liquid distributor 260 evenly guides the water into the connected nozzle 250. The nozzle 250 sprays the water onto the outer surface of the screen cylinder. The water flows along the screen holes of the screen cylinder from the outside to the inside, washing away the mud and dirt adhering to the inside of the screen holes and some of the clogging material, so that the screen holes of the screen cylinder remain unobstructed and can filter the material smoothly.

[0026] It should be noted that the drum screen 100, infusion pump 230, nozzle 250, liquid distributor 260 and jaw crusher mentioned above are all devices with relatively mature existing technology. The specific model can be selected according to actual needs. At the same time, the drum screen 100, infusion pump 230 and jaw crusher are all powered by mains electricity. The specific power supply method is selected according to the situation and will not be elaborated here.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pretreatment apparatus for surface strengthening treatment of recycled aggregate, characterized in that, include: Drum screen (100); The spray cleaning mechanism (200) includes a support frame (210) and a water tank (220). The outlet end of the water tank (220) is fixedly connected to and connected to a liquid pump (230). The outlet end of the liquid pump (230) is fixedly connected to and connected to a liquid guide pipe (240). The liquid guide pipe (240) is fixedly connected to the surface of the support frame (210). The outlet end of the liquid guide pipe (240) faces the upper surface of the screen cylinder of the drum screen (100).

2. The pretreatment apparatus for surface strengthening treatment of recycled aggregate according to claim 1, characterized in that, The liquid outlet end of the liquid guide pipe (240) is fixedly connected to and communicates with a nozzle (250), and the liquid outlet end of the nozzle (250) faces the screen cylinder of the drum screener (100).

3. The pretreatment apparatus for surface strengthening treatment of recycled aggregate according to claim 2, characterized in that, The number of nozzles (250) is not less than ten. The liquid outlet end of the liquid guide tube (240) is fixedly connected to and communicates with a liquid distributor (260). The nozzles (250) are fixedly connected to and communicate with the liquid outlet end of the liquid distributor (260).

4. The pretreatment apparatus for surface strengthening treatment of recycled aggregate according to claim 3, characterized in that, The surface of the support frame (210) is fixedly connected to a liquid guide hopper (270), and the nozzle (250) is located inside the liquid guide hopper (270). The bottom of the liquid guide hopper (270) is in no pressure contact with the screen cylinder of the drum screener (100).

5. The pretreatment apparatus for surface strengthening treatment of recycled aggregate according to claim 4, characterized in that, The vertical cross-sectional shape of the inner side of the liquid guide hopper (270) is an inverted right-angled hexagon, and the width of the lower opening of the liquid guide hopper (270) is greater than the diameter of the nozzle (250).

6. The pretreatment apparatus for surface strengthening treatment of recycled aggregate according to claim 4, characterized in that, The spray cleaning mechanism (200) also includes a reinforced cleaning component (280), which includes a roller brush (281) rotatably connected to the lower surface of the liquid guide hopper (270), and the lower surface of the roller brush (281) is in pressure contact with the upper surface of the screen cylinder of the drum screener (100).

7. The pretreatment apparatus for surface strengthening treatment of recycled aggregate according to claim 6, characterized in that, There are two roller brushes (281), which are symmetrically distributed on both sides of the center line of the liquid distributor (260).

8. The pretreatment apparatus for surface strengthening treatment of recycled aggregate according to claim 7, characterized in that, The surface of the roller brush (281) is rotatably connected to a shield (282), one end of which is fixedly connected to the liquid guide hopper (270). The vertical cross-sectional shape of the shield (282) is an arc shape with the opening facing the screen cylinder of the drum screen (100).

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