Aggregate pretreatment and screening device

Abstract

The utility model discloses an aggregate pretreatment and screening device. The device comprises a vibration device, a pretreatment and screening mechanism and a dumping mechanism. The pretreatment and screening mechanism comprises multiple stages of screen drums and a pretreatment liquid collecting drum, the bottom of each stage of screen drum is of a screen structure, and meanwhile, the side wall of each stage of screen drum is provided with a discharge port controllable in opening and closing; a liquid outlet is formed in the bottom of the pretreatment liquid collecting barrel; the multiple stages of screen drums and the pretreatment liquid collecting drum are sequentially stacked and communicated from top to bottom, the uppermost screen drum is a first-stage screen drum, a feeding port is formed in the top of the first-stage screen drum, and a pretreatment liquid spray head is arranged in the first-stage screen drum; the dumping mechanism is arranged on the vibration device, the pretreatment and screening mechanism is arranged on the dumping mechanism, and the dumping direction of the dumping mechanism faces the side where the discharging ports are located. According to the device, the surface of aggregate is fully and uniformly treated through a reasonable mechanical structure, the modification effect is improved to the greatest extent, and the requirement of batch treatment is met.

Description

Technical Field

[0001] This utility model relates to the field of road engineering aggregate pretreatment technology research, and in particular to an aggregate pretreatment and screening device. Background Technology

[0002] In construction and road engineering, aggregates are one of the key materials constituting pavement structures. Currently, natural aggregates such as crushed stone, gravel, and sand are widely used in pavement structures due to their high strength and stability. In the selection of alternative aggregates, industrial by-products and construction waste, such as steel slag, mineral slag, and recycled concrete aggregates, are gradually becoming research and application hotspots. The application of these alternative aggregates can not only reduce dependence on natural stone resources but also effectively treat industrial waste, resulting in significant environmental benefits. However, if these alternative aggregates are used directly in road engineering without treatment, the following problems often arise:

[0003] Steel slag, a byproduct of steel production, possesses high strength and wear resistance. However, due to the presence of unreacted free calcium oxide (f-CaO) and free magnesium oxide (f-MgO), it expands upon absorbing water, leading to volume instability. Direct use of untreated steel slag may result in water absorption and expansion damage, affecting road durability and safety. Mineral slag, produced during blast furnace ironmaking, exhibits good mechanical properties, but its high water absorption rate can lead to weak bonding with asphalt, impacting pavement durability and fatigue resistance. Recycled concrete aggregate, obtained by crushing and screening waste concrete, often has a surface covered with old cement paste and other impurities. These impurities weaken the aggregate's strength and durability, hindering its application in pavement structures. To effectively address these issues, surface modification pretreatment of these alternative aggregates is necessary. Surface modification technology can significantly improve the physical and chemical properties of aggregates, enhancing their applicability in road engineering. For example, steel slag can have its volume stability improved through hydration, aging, or chemical modification; blast furnace slag can have its adhesion to asphalt enhanced through surface activation; and recycled concrete aggregates can have their surface impurities removed and their quality improved through acid washing or mechanical treatment.

[0004] Although these surface modification technologies have been applied in laboratories or small-scale production, there is still a lack of integrated pretreatment and screening devices capable of efficiently processing these alternative aggregates on a large scale in actual production. Existing modification equipment typically has only a single function and cannot simultaneously perform aggregate modification and screening operations, which not only increases production costs but also reduces processing efficiency. Utility Model Content

[0005] In view of the defects or deficiencies of the existing technology, this utility model provides a material pretreatment and screening device.

[0006] Therefore, the present invention provides a vibrating device for a material pretreatment and screening device, a pretreatment and screening mechanism, and a tilting mechanism;

[0007] The pretreatment and screening mechanism includes multi-stage screen cylinders and a pretreatment liquid collection cylinder. Each stage screen cylinder has a screen mesh structure at the bottom and a switchable discharge port on its side wall. The pretreatment liquid collection cylinder has a liquid outlet at the bottom. The multi-stage screen cylinders and the pretreatment liquid collection cylinder are arranged sequentially from top to bottom and are connected. The aperture of the screen mesh at the bottom of each stage screen cylinder decreases sequentially from top to bottom. The uppermost screen cylinder is the first-stage screen cylinder. The top of the first-stage screen cylinder has a feed inlet and a pretreatment liquid nozzle inside. The discharge ports of each stage screen cylinder are located on the same side of the material collection, pretreatment, and screening device.

[0008] The tilting mechanism is mounted on the vibrating device, and the pretreatment and screening mechanism is mounted on the tilting mechanism, with the tilting direction of the tilting mechanism facing the side where each discharge port is located.

[0009] An optional embodiment is that the tilting mechanism includes a lever fulcrum, a tilting fulcrum, a lifting lever, and a lifting device; the lever fulcrum and the tilting fulcrum are mounted on the vibrating device, the lifting device is mounted beside the vibrating device, and the side of the lifting device is opposite to the side of each discharge port; one end of the lifting lever is connected to the lever fulcrum, and the other end is connected to the lifting device; the tilting fulcrum is located on the extension line of the end of the lifting lever; the pretreatment and screening mechanism is mounted on the tilting fulcrum and the lifting lever.

[0010] An alternative solution is to provide a support block between the bottom of the simultaneous pretreatment and screening mechanism and the vibration device.

[0011] Alternatively, the bottom of the pretreatment liquid collection cylinder is also provided with a circulating liquid outlet, which is connected to the pretreatment liquid nozzle via a circulating pump.

[0012] An alternative solution is to install a filter screen at the outlet of the circulating liquid.

[0013] An alternative solution is to provide a sliding door at the controllable discharge port, with the sliding door controlling the opening and closing of the discharge port.

[0014] An alternative solution is to install a hopper at the switch-controllable discharge port.

[0015] This invention combines mechanical and chemical methods to ensure that the surface of the aggregate is fully and uniformly treated, maximizing the modification effect while meeting the needs of large-scale mass production; it also enables the recycling of the surface modification agent, reducing waste. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the device of this utility model. Detailed Implementation

[0017] Unless otherwise specified, the scientific and technical terms used in this article are intended for understanding by those skilled in the art.

[0018] The directional or orientational terms used herein, such as above, below, top, bottom, side, and right, are consistent with the relevant directions or orientations in the accompanying drawings. It should be noted that the accompanying drawings are intended to explain this utility model, and any solutions obtained by those skilled in the art through equivalent transformations based on the disclosure herein are within the protection scope of this utility model. The utility model will now be described in further detail with reference to the accompanying drawings.

[0019] See Figure 1 As shown, the aggregate pretreatment and screening device of this utility model includes a vibration device 1, a pretreatment and screening mechanism 2, and a tilting mechanism.

[0020] The pretreatment and screening mechanism 2 includes multi-stage screen cylinders and a pretreatment liquid collection cylinder 22. Each stage of the screen cylinder has a screen mesh structure at its bottom, and each stage's side wall is equipped with a switchable discharge port 24. The pretreatment liquid collection cylinder has a liquid outlet 23 at its bottom. The multi-stage screen cylinders and the pretreatment liquid collection cylinder 22 are arranged in multiple layers from top to bottom and are detachably connected (e.g., by snap-fit ​​connections). Adjacent layers are connected by screen meshes. The mesh size of each stage of the screen cylinder decreases sequentially from top to bottom. The uppermost screen cylinder is the first-stage screen cylinder 21, which has a feed inlet 26 at its top (the location of the feed inlet can be designed according to the available installation space). The first-stage screen cylinder may also have a treatment liquid nozzle 27 at its top; multiple nozzles can be installed. After installation, the discharge ports on each stage of the screen cylinder are located on the same side of the overall device. Figure 1 The image shows the location on the right side of the device;

[0021] The tilting mechanism is mounted on the vibrating device. The pretreatment and screening mechanisms are mounted on both the tilting mechanism and the vibrating device. When the tilting mechanism tilts, it can tilt the pretreatment and screening devices toward the side where the discharge port is located.

[0022] In the specific scheme, the mesh size of each level of screen cylinder is set according to the aggregate gradation.

[0023] The working principle of the device is as follows:

[0024] Initially, the tilting mechanism is in a horizontal position, meaning the pretreatment and screening mechanisms remain in a vertical state; the discharge ports of each stage of the screen cylinder are closed.

[0025] When starting work, add the aggregate to be treated through the feed inlet and supply pretreatment liquid to the nozzle. The pretreatment liquid is sprayed onto the surface of the aggregate, and the vibration device is turned on at the same time. Vibrating the aggregate makes the pretreatment liquid evenly act on the surface of the aggregate. At the same time, the aggregate is vibrated and screened. During the process, excess pretreatment liquid is collected into the pretreatment liquid collection cylinder and discharged through the liquid outlet. After the pretreatment and screening of the aggregate are completed, the vibration motor is turned off.

[0026] Then, the tilting mechanism lifts or moves one side of the pretreatment and screening mechanism, tilting it toward the discharge port. Then, the discharge port of the corresponding graded screen cylinder is opened to collect the corresponding graded aggregates after pretreatment and screening.

[0027] A specific dumping mechanism such as Figure 1 As shown, it includes a lever fulcrum 31, a tilting fulcrum 32, a lifting lever 33, and a lifting device 34 (such as a jack); wherein the lever fulcrum 31 and the tilting fulcrum 32 are set on the vibrating device 1, the lifting device 34 is set on the side of the vibrating device, and the side where the lifting device is located is opposite to the side where each discharge port is located; one end of the lifting lever 33 is connected to the lever fulcrum, and the other end is connected to the lifting device; and the tilting fulcrum is located on the extension line of the end of the lifting lever;

[0028] The pretreatment and screening mechanism is mounted on the tilting fulcrum 32 and the lifting lever 33. A support block 35 is provided between the bottom of the pretreatment and screening mechanism and the vibrating device to ensure stable support when the pretreatment and screening mechanism is in a horizontal or vertical position. One end of the lever 33 is lifted by the lifting mechanism, causing the lever to rise around the lever fulcrum 31, thus tilting the pretreatment and screening mechanism towards the discharge port around the tilting fulcrum 32.

[0029] In some designs, the bottom of the pretreatment liquid collection cylinder is also equipped with a circulating liquid outlet, which is connected to the pretreatment liquid nozzle via a circulating pump to achieve the recycling of the pretreatment liquid. In a further design, a filter screen is installed at the circulating liquid outlet to filter out solid particles.

[0030] In the specific design, the controllable discharge port is equipped with a push-pull sliding door, which slides along the circumference of the corresponding screen cylinder, and the push-pull sliding door controls the opening and closing of the corresponding discharge port.

[0031] In other designs, a hopper 25 is installed at each switch-controlled discharge port.

[0032] The above description is merely a preferred embodiment of this utility model. For those skilled in the art, the technical solutions described in the foregoing embodiments can still be combined, or some of the technical features can be equivalently replaced. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A material pretreatment and screening device, comprising a vibration device, characterized in that, It also includes a pretreatment and screening mechanism and a tilting mechanism; The pretreatment and screening mechanism includes multi-stage screen cylinders and a pretreatment liquid collection cylinder. Each stage screen cylinder has a screen mesh structure at the bottom and a switchable discharge port on its side wall. The pretreatment liquid collection cylinder has a liquid outlet at the bottom. The multi-stage screen cylinders and the pretreatment liquid collection cylinder are arranged sequentially from top to bottom and are connected. The aperture of the screen mesh at the bottom of each stage screen cylinder decreases sequentially from top to bottom. The uppermost screen cylinder is the first-stage screen cylinder. The top of the first-stage screen cylinder has a feed inlet and a pretreatment liquid nozzle inside. The discharge ports of each stage screen cylinder are located on the same side of the material collection, pretreatment, and screening device. The tilting mechanism is mounted on the vibrating device, and the pretreatment and screening mechanism is mounted on the tilting mechanism, with the tilting direction of the tilting mechanism facing the side where each discharge port is located.

2. The aggregate pretreatment and screening device according to claim 1, characterized in that, The tilting mechanism includes a lever fulcrum, a tilting fulcrum, a lifting lever, and a lifting device; the lever fulcrum and the tilting fulcrum are set on the vibrating device, the lifting device is set on the side of the vibrating device, and the side where the lifting device is located is opposite to the side where each discharge port is located; one end of the lifting lever is connected to the lever fulcrum and the other end is connected to the lifting device; the tilting fulcrum is located on the extension line of the end of the lifting lever. The pretreatment and screening mechanism is located on the tilting fulcrum and the lifting lever.

3. The aggregate pretreatment and screening device according to claim 2, characterized in that, A support block is provided between the bottom of the pretreatment and screening mechanism and the vibration device.

4. The aggregate pretreatment and screening device according to claim 1, characterized in that, The bottom of the pretreatment liquid collection cylinder is also provided with a circulating liquid outlet, which is connected to the pretreatment liquid nozzle through a circulating pump.

5. The aggregate pretreatment and screening device according to claim 4, characterized in that, A filter screen is installed at the outlet of the circulating liquid.

6. The aggregate pretreatment and screening device according to claim 1, characterized in that, The controllable discharge port is equipped with a sliding door, which controls the opening and closing of the discharge port.

7. The aggregate pretreatment and screening device according to claim 1, characterized in that, A hopper is installed at the switch-controllable discharge port.

Images