Concrete aggregate pre-cooling device

Abstract

The application discloses a concrete aggregate precooling device, which comprises a precooling bin main body, a decentralized feeding assembly for continuous feeding is fixedly installed at the middle position of the upper end face of the precooling bin main body, a precooling assembly for secondary precooling of the aggregate is arranged at the upper portion in the precooling bin main body, and a material guiding assembly with a vibrating function is arranged at the lower portion in the precooling bin main body; the decentralized feeding assembly comprises an upper feeding disc. The application adopts a multi-stage shunt feeding structure, relies on the cooperation of the auger blade, the bulk material pushing piece and multiple inclined bulk material pipes to jointly act on the aggregate, and divides the aggregate originally falling in a single point into multiple points for uniform falling, so that the problem of local accumulation of the material is improved from the source. The structure can adapt to the continuous feeding working condition, effectively avoids the bridging and plugging phenomenon of the feeding port and the upper portion of the bin body, guarantees the continuous and stable aggregate conveying process, and improves the overall operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of concrete production technology, and in particular to a concrete aggregate precooling device. Background Technology

[0002] If the temperature of concrete aggregate is too high before mixing and use, it can easily affect the concrete's molding quality and workability. Therefore, pre-cooling treatment of the aggregate is often necessary. Existing aggregate pre-cooling equipment mostly adopts a single vertical feeding structure, which can easily lead to local accumulation and bridging of materials in the bin during concentrated falling. In the operation of conventional screw conveyor components, damp aggregate can easily adhere to the blade surface, further aggravating the material blockage problem.

[0003] Meanwhile, traditional air-cooled precooling equipment mostly uses direct exhaust air supply, with the low-temperature air after heat exchange being directly discharged. This results in low cooling capacity utilization, high energy consumption, and only allows for single-pass cooling of falling materials, leading to poor temperature uniformity. Some equipment adds vibrating motors and striking mechanisms to solve the material accumulation problem, resulting in numerous power components, complex structures, high failure rates, and high maintenance costs.

[0004] Furthermore, existing equipment on the market has a simple airflow layout, making it impossible to combine waste heat recovery with multi-stage precooling. The material conveying, screening, and cooling mechanisms operate independently, resulting in poor interoperability and making it difficult to simultaneously meet the comprehensive needs of anti-clogging, cost reduction, and efficient precooling. Therefore, how to provide a concrete aggregate precooling device is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] One object of the present invention is to provide a concrete aggregate precooling device to solve the above-mentioned technical problems.

[0006] A concrete aggregate precooling device according to an embodiment of the present invention includes: The precooling silo body has a decentralized feeding component for continuous feeding fixedly installed at the middle position of the upper surface of the precooling silo body, a precooling component for secondary precooling of aggregate is provided at the upper part of the precooling silo body, and a material guiding component with vibration function is provided at the lower part of the precooling silo body. The decentralized feeding assembly includes an upper loading tray. The outer periphery of the upper surface of the upper loading tray is fixedly installed to the upper surface of the pre-cooling chamber body by several bolts. A feeding hopper is fixedly connected to the inner wall of the upper loading tray. A conical loading box is fixedly connected to the lower end face of the feeding hopper. An upper roller shaft is rotatably connected to the center of the upper end face of the conical loading box via a bearing. An auger blade is fixedly connected to the upper surface of the upper roller shaft. Three material dispersing blades are fixedly connected to the lower surface of the upper roller shaft. An upper motor is fixedly installed on the upper surface of the bottom loading plate of the conical loading box, and the groove of the upper output shaft of the upper motor is engaged with the lowest end of the upper roller shaft. Several inclined material dispersing pipes are connected to the outer surface of the lower end of the feeding hopper.

[0007] As a preferred embodiment of the present invention, the upper surface of both the upper loading tray and the front end of the conical loading box is embedded with a cable conduit shaped like an umbrella handle.

[0008] As a preferred embodiment of the present invention, the precooling assembly includes a gathering plate, which is fixedly connected to the inner wall of the upper end of the precooling chamber body. The left side of the lower end of the gathering plate and the left side of the precooling chamber body are both provided with a content groove. A jointed material distribution plate is inserted into the inner cavity of the content groove. The bottom of the left end face of the jointed material distribution plate and the left side of the precooling chamber body are both threadedly connected with a locking rod.

[0009] As a preferred embodiment of the present invention, the two sides of the upper end of the precooling chamber body are rotatably connected to a center roller shaft via bearings. The outer surface of the left end of the center roller shaft is fixedly connected to an auger blade that fits against the inner wall of the lower end of the gathering plate. A center motor is fixedly installed on the right side of the upper end of the precooling chamber body, and the output shaft of the left end of the center motor and the right end of the center roller shaft are both fixedly connected via a coupling.

[0010] As a preferred embodiment of the present invention, a main precooling pipe is fixedly connected to the middle of the front surface of the inner cavity of the precooling chamber body. A circulating fan is fixedly installed on the front of the upper end of the precooling chamber body. The air extraction port at the upper end of the circulating fan and the front of the upper end of the precooling chamber body are both connected by a main extraction pipe with a built-in filter. An air cooler is fixedly installed directly below the circulating fan and on the front of the precooling chamber body. The air inlet at the upper end of the air cooler is connected to the exhaust port at the front end of the circulating fan. The front end of the main precooling pipe and the exhaust port at the lower end of the air cooler are both connected by an air inlet pipe.

[0011] As a preferred embodiment of the present invention, a filter cartridge is fixedly installed in the mounting hole directly below the air inlet pipe and located on the front of the precooling chamber body. A secondary precooling pipe is fixedly connected to the inner wall of the left side of the upper end of the precooling chamber body. The air inlet at the left end of the secondary precooling pipe and the air outlet at the front end of the filter cartridge are both connected to a circulating air duct.

[0012] As a preferred embodiment of the present invention, the material guiding assembly includes a plurality of internal resistance strips, the internal resistance strips being fixedly connected to the inner wall of the intermediate roller shaft, a plurality of steel balls being installed in the inner cavity of the intermediate roller shaft, and an outer sealing plug with a handle being threadedly connected to the outer surface of the left end of the intermediate roller shaft.

[0013] As a preferred embodiment of the present invention, a guide plate is fixedly connected to the bottom of the rear surface of the inner cavity of the precooling chamber body. An arc-shaped guide plate is fixedly connected to the bottom of the guide plate and the precooling chamber body on the side closest to each other. A discharge pipe is connected to the front of the lower left side of the precooling chamber body. A lower roller is rotatably connected to the front of the lower right side of the precooling chamber body through a bearing. An auger blade is fixedly connected to the surface of the left end of the lower roller. A lower motor is fixedly installed to the front of the lower right side of the precooling chamber body, and the output shaft of the lower motor on the left end and the right end of the lower roller are fixedly connected through a coupling.

[0014] As a preferred embodiment of the present invention, the lower ends of the precooling chamber body are connected to driven shafts at the middle positions of both sides via bearings. The left end of the driven shaft has a surface with a curved array of several guide rubber rods. The middle roller shaft and the right end of the driven shaft are both fixedly mounted with a transmission sprocket, and the surface of the transmission sprocket is meshed with a transmission chain.

[0015] The beneficial effects of this invention are: This invention employs a multi-stage diversion feeding structure, relying on the combined action of auger blades, material dispersing blades, and multiple inclined material dispersing pipes to break down aggregates that originally fell from a single point into multiple points of uniform material flow. This improves the problem of localized material accumulation from the source. This structure can adapt to continuous feeding conditions, effectively avoiding bridging and blockage at the feed inlet and the upper part of the silo, ensuring continuous and stable aggregate conveying process, and improving overall operating efficiency.

[0016] This invention integrates vibration function into the conveyor main shaft. It utilizes a hollow intermediate roller shaft with internal resistance strips and steel balls. The rotation of the shaft drives the steel balls to roll and impact, generating micro-vibration. There is no need to add independent vibration motors, exciters, or other components. On the one hand, it can shake off the wet aggregate adhering to the surface of the spiral blades, preventing the blades from sticking and getting stuck. On the other hand, the vibration can be transmitted downward to clear the material channel. This simplifies the overall mechanical structure of the machine, reduces the number of power components, and lowers the energy consumption and failure rate of the equipment.

[0017] This invention adopts a closed-loop multi-stage air-cooling structure. The cold air first passes through the main pre-cooling pipe to cool the aggregate falling in the middle section. After heat exchange, the low-temperature waste air is filtered and purified by the filter cartridge, and then transported to the feeding area by the auxiliary pre-cooling pipe to achieve pre-cooling. The waste heat cold air is fully recovered and utilized. The entire air circuit is closed and circulated, which greatly improves the utilization rate of cooling capacity and reduces the load on the refrigeration system. At the same time, the closed structure can suppress dust overflow, which has both energy-saving and environmental protection characteristics.

[0018] This invention features a sprocket and chain linkage mechanism that synchronously drives the driven shaft and guide rods via the main conveyor shaft, forming a rotary flexible striking structure that intermittently strikes the guide plate. Combined with the micro-vibration effect of the main shaft, this creates a dual anti-clogging system that effectively shakes off aggregates stuck or adhering to the surface of the guide plate. It is particularly suitable for complex aggregate conditions with high moisture content and high mud content, significantly improving the equipment's adaptability to different materials and its operational reliability.

[0019] The present invention features a layered filter cartridge and protective filter screen at the interface between the airflow system and the pipeline. The lower filter cartridge is responsible for filtering coarse dust and debris in the airflow, while the filter screen at the upper main exhaust pipe intercepts fine debris, achieving graded protection. This effectively prevents impurities from entering core components such as the circulating fan and air cooler, reduces dust accumulation and blockage inside the pipeline and equipment, extends the service life of core components, and reduces the frequency and cost of daily inspection and maintenance of the equipment. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a concrete aggregate precooling device proposed in this invention; Figure 2 This is a schematic diagram of the structure of a concrete aggregate precooling device proposed in this invention, viewed from the right side.

[0021] Figure 3 This is a front sectional view of a concrete aggregate precooling device proposed in this invention.

[0022] Figure 4 This invention proposes a concrete aggregate precooling device. Figure 3 A structural diagram from the bottom view.

[0023] Figure 5 This is a side sectional view of a concrete aggregate precooling device proposed in this invention.

[0024] Figure 6 This invention proposes a concrete aggregate precooling device. Figure 5 A three-dimensional image.

[0025] Figure 7 This invention proposes a concrete aggregate precooling device. Figure 6 A structural diagram from the right-hand perspective.

[0026] Figure 8 This is an exploded view of a distributed feeding assembly for a concrete aggregate precooling device proposed in this invention.

[0027] Figure 9 This is a schematic diagram of the precooling component structure of a concrete aggregate precooling device proposed in this invention.

[0028] Figure 10 This invention proposes a concrete aggregate precooling device. Figure 9 A structural diagram from a rear view.

[0029] Figure 11 This is an exploded view of the precooling component and the material guiding component of a concrete aggregate precooling device proposed in this invention.

[0030] Figure 12 This invention proposes a concrete aggregate precooling device. Figure 3 Enlarged view of point A in the middle.

[0031] Figure 13 This invention proposes a concrete aggregate precooling device. Figure 3 Enlarged view of point B in the middle.

[0032] Figure 14 This invention proposes a concrete aggregate precooling device. Figure 6 A magnified view of point C in the middle.

[0033] Figure 15 This invention proposes a concrete aggregate precooling device. Figure 6 Enlarged view of point D in the middle.

[0034] In the diagram: 1. Pre-cooling silo main body; 2. Distributed feeding assembly; 201. Upper loading tray; 202. Feed hopper; 203. Conical box; 204. Upper roller; 205. Screwdriver blade one; 206. Material dispensing blade; 207. Upper motor; 208. Material dispensing pipe; 209. Cable conduit; 3. Pre-cooling assembly; 301. Gathering plate; 302. Inner trough; 303. Sealing material dispensing plate; 304. Locking rod; 305. Middle roller; 306. Screwdriver blade two; 307. Middle motor; 308. Main pre-cooling pipe; 3 09. Circulating fan; 310. Main extraction pipe; 311. Air cooler; 312. Air inlet pipe; 313. Filter cartridge; 314. Secondary pre-cooling pipe; 315. Circulating air duct; 4. Material guiding assembly; 401. Inner resistance bar; 402. Steel ball; 403. Outer seal; 404. Material guiding inclined plate; 405. Material guiding horizontal plate; 406. Discharge pipe; 407. Lower roller shaft; 408. Screwdriver blades; 409. Lower motor; 410. Driven shaft; 411. Material guiding rubber rod; 412. Drive sprocket; 413. Drive chain. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0036] refer to Figures 1-15 .

[0037] In this embodiment, a concrete aggregate precooling device includes: a precooling silo body 1; a distributed feeding assembly 2 for continuous feeding is fixedly installed at the middle position of the upper surface of the precooling silo body 1; a precooling assembly 3 for secondary precooling of the aggregate is arranged at the upper part of the interior of the precooling silo body 1; and a guide assembly 4 with vibration function is arranged at the lower part of the interior of the precooling silo body 1. The distributed feeding assembly 2 includes an upper loading plate 201, the outer periphery of the upper surface of the upper loading plate 201 is fixedly installed on the upper surface of the precooling silo body 1 by several bolts, a feeding hopper 202 is fixedly connected to the inner wall of the upper loading plate 201, and a conical feed hopper 202 is fixedly connected to the lower end face of the feeding hopper 202. The upper end of the conical box 203 is rotatably connected to the center of the upper end face via a bearing. The upper end surface of the upper roller 204 is fixedly connected to the auger blade 205. The lower end surface of the upper roller 204 is fixedly connected to three material dispensing blades 206. The upper surface of the bottom plate of the conical box 203 is fixedly installed with an upper motor 207. The groove of the upper output shaft of the upper motor 207 is engaged with the lower end of the upper roller 204. The outer surface of the lower end of the feed hopper 202 is connected to several inclined material dispensing pipes 208. The upper surface of the upper plate 201 and the front end of the conical box 203 are both embedded with umbrella handle-shaped cable conduits 209.

[0038] The upper motor 207 is designed with a hexagonal groove at its output end and a hexagonal end at the lower end of its roller 204. When the equipment is running, the upper motor 207 drives the roller 204 to rotate together via the hexagonal contact surface to complete the material conveying. When maintenance is required, the fixing bolts of the bottom plate of the conical box 203 are removed, and the upper motor 207 is taken out along with the plate. The two hexagonal structures are separated directly without jamming each other. This connection method makes the disassembly and assembly of the decentralized feeding assembly 2 simpler and facilitates the maintenance and replacement of parts by the staff.

[0039] The system features a feed hopper 202 and an inclined material distribution pipe 208. An auger blade 205 is installed at the upper end of the upper roller 204, and a material distribution deflector 206 is installed at the lower end. During operation, the auger blade 205 continuously pushes the aggregate downwards. After the material enters the bottom space of the feed hopper 202, the rotating material distribution deflector 206 separates the material, allowing it to fall from the surrounding material distribution pipe 208. This feeding method changes the traditional single-point feeding pattern, preventing material accumulation and jamming inside the equipment, and ensuring the normal operation of the feeding process.

[0040] The precooling assembly 3 includes a gathering plate 301, which is fixedly connected to the inner wall of the upper end of the precooling chamber body 1. Both the lower left side of the gathering plate 301 and the left side of the precooling chamber body 1 have internal grooves 302. A sealing material distribution plate 303 is inserted into the inner cavity of the internal groove 302. A locking rod 304 is threadedly connected to the bottom of the left end of the sealing material distribution plate 303 and the left side of the precooling chamber body 1. A center roller 305 is rotatably connected to both sides of the upper end of the precooling chamber body 1 via bearings. A second auger blade 306, which fits against the inner wall of the lower end of the gathering plate 301, is fixedly connected to the outer surface of the left end of the center roller 305. A center motor 307 is fixedly installed on the right side of the upper end of the precooling chamber body 1, and the output shaft of the left end of the center motor 307 is fixedly connected to the right end of the center roller 305 via a coupling. The middle position of the front surface of the inner cavity of the precooling chamber body 1 is fixed. A main precooling pipe 308 is connected to a circulating fan 309 fixedly installed on the front of the upper end of the precooling chamber body 1. The air extraction port at the upper end of the circulating fan 309 is connected to the main extraction pipe 310 with a built-in filter screen on the front of the upper end of the precooling chamber body 1. An air cooler 311 is fixedly installed directly below the circulating fan 309 and on the front of the precooling chamber body 1. The air inlet at the upper end of the air cooler 311 is connected to the exhaust port at the front end of the circulating fan 309. The front end of the main precooling pipe 308 and the exhaust port at the lower end of the air cooler 311 are both connected to an air inlet pipe 312. A filter cartridge 313 is fixedly installed in the mounting hole directly below the air inlet pipe 312 and on the front of the precooling chamber body 1. A secondary precooling pipe 314 is fixedly connected to the inner wall of the left side of the upper end of the precooling chamber body 1. The air inlet at the left end of the secondary precooling pipe 314 and the air outlet at the front end of the filter cartridge 313 are both connected to a circulating air pipe 315.

[0041] The system features a circulating air path consisting of a main precooling pipe 308, a filter cartridge 313, a circulating air duct 315, a secondary precooling pipe 314, and a main extraction pipe 310. During operation, the circulating fan 309 and the air cooler 311 produce cold air. The cold air enters the main precooling pipe 308 through the air inlet pipe 312 to cool the falling aggregate. The cold air blowing over the material flows downward, passes through the filter cartridge 313 to remove dust, and then flows along the circulating air duct 315 to the secondary precooling pipe 314 to precool the aggregate that has just fallen from above. Finally, the airflow returns to the fan through the main extraction pipe 310 and is continuously circulated. This air path can reuse the cold air, resulting in a more uniform cooling effect and reduced power consumption. The enclosed structure also prevents dust from drifting outward.

[0042] By setting up a double-layer filtration structure with a bottom filter cartridge 313 and an upper main extraction pipe 310 embedded filter screen, when the cold air circulates, larger dust and particles will be blocked by the lower filter cartridge 313, while smaller debris will be intercepted by the filter screen inside the main extraction pipe 310. This can prevent impurities from entering the circulating fan 309 and the air cooler 311, prevent pipe blockage and parts wear, extend equipment service life, and reduce the number of daily maintenance operations.

[0043] The material guiding assembly 4 includes several inner resistance bars 401, which are fixedly connected to the inner wall of the intermediate roller shaft 305. Several steel balls 402 are installed in the inner cavity of the intermediate roller shaft 305. An outer sealing plug 403 with a handle is threadedly connected to the outer surface of the left end of the intermediate roller shaft 305. A material guiding inclined plate 404 is fixedly connected to the bottom of the rear surface of the inner cavity of the precooling chamber body 1. An arc-shaped material guiding horizontal plate 405 is fixedly connected to the bottom of the side of the material guiding inclined plate 404 and the side of the precooling chamber body 1 that are close to each other. A discharge pipe 406 is connected to the front of the lower left side of the precooling chamber body 1. A lower roller shaft is rotatably connected to the front of the lower right side of the precooling chamber body 1 through a bearing. 407, the surface of the left end of the lower roller 407 is fixedly connected to the auger blade 408, the front of the right side of the lower end of the precooling chamber body 1 is fixedly installed with the lower motor 409, and the output shaft of the left end of the lower motor 409 and the right end of the lower roller 407 are fixedly connected by a coupling; the middle position of the two sides of the lower end of the precooling chamber body 1 is rotatably connected to the driven shaft 410 through the bearing, and the surface of the left end of the driven shaft 410 has a curved array of several guide rubber rods 411. The surface of the middle roller 305 and the right end of the driven shaft 410 are both fixedly installed with a transmission sprocket 412, and the surface of the transmission sprocket 412 is meshed with a transmission chain 413.

[0044] The design incorporates a hollow, central roller shaft 305 containing internal resistance bars 401 and steel balls 402. When the central roller shaft 305 rotates, the internal steel balls 402 are driven by the internal resistance bars 401 to roll back and forth and collide with each other, causing micro-vibrations throughout the shaft. These micro-vibrations are transmitted to the auger blades 306 and the material channel. This self-generated vibration dislodges damp material adhering to the blades and clears the material channel. This structure eliminates the need for an additional vibration motor, simplifying the design and reducing power consumption and the probability of malfunction. Furthermore, the shape of the retracting plate 301 self-limits the outer surface of the auger blades 306, thus reducing vibration as the central roller shaft 305 extends to the right side of the pre-cooling chamber body 1. This also effectively reduces the vibration impact when the transmission sprocket 412 and transmission chain 413 are linked.

[0045] By setting up a transmission sprocket 412, a transmission chain 413, and a driven shaft 410 equipped with a guide rubber rod 411, when the equipment is working, the intermediate roller shaft 305 drives the driven shaft 410 to rotate together with the sprocket and chain. The guide rubber rod 411 on the driven shaft 410 rotates continuously and continuously knocks the bottom of the guide inclined plate 404, which can shake the material remaining on the inclined plate off. The equipment can also be used normally when facing aggregates with high moisture content and mixed with soil, and the operation is more stable.

[0046] Working principle: The material is fed into the equipment through the decentralized feeding component 2. The upper motor 207 drives the upper roller 204 to rotate continuously. The upper roller 204 drives the outer auger blade 205 to rotate synchronously, conveying the aggregate inside the feeding hopper 202 and the conical box 203 downward. Under the push of the auger blade 205, the aggregate is inclined and diverted through multiple sets of circumferentially arranged dispersing pipes 208, and falls from multiple points into the upper area inside the pre-cooling chamber 1, realizing multi-point uniform material drop and avoiding local material accumulation caused by single-point concentrated feeding. The lower end of the upper roller 204 at the bottom of the conical box 203 is fixed with a dispersing blade 206. The dispersing blade 206 rotates synchronously with the shaft to disperse the aggregate that reaches the bottom for a second time, ensuring that the material enters the subsequent cavity smoothly. The wiring pipes 209 set on the upper loading tray 201 and the conical box 203 are used to organize the wiring layout and improve the overall cleanliness and safety of the equipment. After the material falls into the pre-cooling component 3 area, the intermediate motor 307 drives the intermediate roller 305 to rotate through the coupling. The auger blades 306 on the outer side of the intermediate roller 305 rotate accordingly, cooperating with the gathering plate 301 and the jointing material distribution plate 303 to agitate and guide the aggregate. The jointing material distribution plate 303 is assembled by inserting into the inner groove 302 and locked by the locking rod 304. It is easy to disassemble and assemble, and can be flexibly inspected and replaced according to the particle size of the material and the conveying conditions. The intermediate roller 305 has a hollow structure with an inner resistance bar 401 fixed inside. The cavity is filled with several steel balls 402. Both ends of the shaft are sealed by outer plugs 403. When the intermediate roller 305 rotates, the steel balls 402 roll continuously along the inner cavity wall and collide with each other under the centrifugal force and the lifting action of the inner resistance bar 401, so that the entire shaft generates stable micro-vibration. The vibration is synchronously transmitted to the auger blade 306, which can effectively shake off the wet aggregate adhering to the blade surface and prevent the blade from sticking to the material and blocking the rotation. At the same time, the vibration is transmitted downward to help clear the material channel below. The main body 1 of the precooling silo is equipped with a circulating fan 309 and an air cooler 311 on the front, forming a closed-loop circulating air-cooling system. When the circulating fan 309 is running, the exhaust port at the front end delivers airflow to the air cooler 311. After the airflow is cooled by the air cooler 311, it is sent into the main precooling pipe 308 through the air inlet pipe 312. The main precooling pipe 308 sends low-temperature cold air towards the material falling area in the silo to perform primary precooling on the falling aggregate. After heat exchange, the airflow flows to the lower part of the silo and enters the filter cartridge 313 on the front of the main body 1 of the precooling silo. The filter cartridge 313 removes dust and purifies the dust-laden airflow, preventing aggregate dust and fine particles from entering the pipeline. The purified low-temperature waste air is delivered to the secondary precooling pipe 314 through the circulating air duct 315. The secondary precooling pipe 314 is arranged in the upper feeding area of ​​the silo, using the recovered waste cooling to precool the high-temperature aggregate that has just fallen, realizing the secondary utilization of cold energy. The airflow inside the chamber eventually converges at the top of the pre-cooling chamber body 1, and flows back to the exhaust port of the circulating fan 309 through the main extraction pipe 310 with its own filter. The filter can intercept small debris and protect the fan body. The entire air path forms a closed loop, and the cold air is continuously circulated. After the aggregate is pre-cooled in multiple stages, it continues to fall to the surface of the guide plate 404. Under the combined action of gravity and shaft vibration, it slides down the plate surface. The bottom of the guide plate 404 is connected to the arc-shaped guide plate 405, which gathers and guides the material, so that the aggregate is gathered in the discharge area at the bottom of the equipment. The drive sprocket 412 at the right end of the middle roller 305 is driven by the drive chain 413 and the drive sprocket 412 at the end of the driven shaft 410. When the middle roller 305 rotates, it drives the driven shaft 410 to rotate synchronously. Multiple sets of guide rubber rods 411 are arranged in an array on the outside of the driven shaft 410. The guide rubber rods 411 intermittently knock the bottom of the guide inclined plate 404 as the shaft rotates, further shaking off the material stuck on the plate surface, accelerating the feeding, and completely avoiding the aggregate from sticking, bridging and blocking on the inclined plate surface. Finally, the material is collected at the lower end of the pre-cooling chamber body 1. The lower motor 409 drives the lower roller 407 to rotate. The auger blades 408 on the outside of the lower roller 407 continuously push the material, and smoothly transport the cooled aggregate to the discharge pipe 406, from which it is discharged outward, completing the whole process of aggregate feeding, diversion, multi-stage pre-cooling, anti-blocking conveying and finished product discharge.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A concrete aggregate precooling device, characterized in that, include: The precooling chamber body (1) has a decentralized feeding component (2) for continuous feeding fixedly installed at the middle position of the upper end face of the precooling chamber body (1), a precooling component (3) for secondary precooling of aggregate is provided at the upper part of the precooling chamber body (1), and a guide component (4) with vibration function is provided at the lower part of the precooling chamber body (1). The decentralized feeding assembly (2) includes an upper loading tray (201). The outer periphery of the upper surface of the upper loading tray (201) is fixedly installed on the upper surface of the pre-cooling chamber body (1) by several bolts. The inner wall of the upper loading tray (201) is fixedly connected to a feeding hopper (202). The lower end face of the feeding hopper (202) is fixedly connected to a conical box (203). The center position of the upper end face of the conical box (203) is rotatably connected to an upper roller shaft (204) through a bearing. A screw conveyor blade (205) is fixedly connected to the upper end of the roller (204). Three material dispensing blades (206) are fixedly connected to the lower end of the upper roller (204). An upper motor (207) is fixedly installed on the upper surface of the bottom plate of the conical box (203). The groove of the upper output shaft of the upper motor (207) is engaged with the lower end of the upper roller (204). Several inclined material dispensing pipes (208) are connected to the outer surface of the lower end of the feed hopper (202).

2. The concrete aggregate precooling device according to claim 1, characterized in that, The upper surface of both the upper tray (201) and the conical box (203) has an umbrella handle-shaped cable conduit (209) embedded in it.

3. The concrete aggregate precooling device according to claim 2, characterized in that, The precooling component (3) includes a gathering plate (301), which is fixedly connected to the inner wall of the upper end of the precooling chamber body (1). The left side of the lower end of the gathering plate (301) and the left side of the precooling chamber body (1) are both provided with a content groove (302). A jointed material distribution plate (303) is inserted into the inner cavity of the content groove (302). The bottom of the left end face of the jointed material distribution plate (303) and the left side of the precooling chamber body (1) are both threadedly connected with a locking rod (304).

4. A concrete aggregate precooling device according to claim 3, characterized in that, The two sides of the upper end of the precooling chamber body (1) are rotatably connected to the middle roller shaft (305) by bearings. The outer surface of the left end of the middle roller shaft (305) is fixedly connected to the auger blade (306) that is in contact with the inner wall of the lower end of the gathering plate (301). The right side of the upper end of the precooling chamber body (1) is fixedly installed with the middle motor (307), and the output shaft of the left end of the middle motor (307) and the right end of the middle roller shaft (305) are both fixedly connected by coupling.

5. A concrete aggregate precooling device according to claim 4, characterized in that, A main precooling pipe (308) is fixedly connected to the middle of the front surface of the inner cavity of the precooling chamber body (1). A circulating fan (309) is fixedly installed on the front of the upper end of the precooling chamber body (1). The air extraction port at the upper end of the circulating fan (309) and the front of the upper end of the precooling chamber body (1) are both connected to a main extraction pipe (310) with a built-in filter. An air cooler (311) is fixedly installed directly below the circulating fan (309) and on the front of the precooling chamber body (1). The air inlet at the upper end of the air cooler (311) is connected to the exhaust port at the front end of the circulating fan (309). The front end of the main precooling pipe (308) and the exhaust port at the lower end of the air cooler (311) are both connected to an air inlet pipe (312).

6. A concrete aggregate precooling device according to claim 5, characterized in that, A filter cartridge (313) is fixedly installed in the mounting hole directly below the air inlet pipe (312) and on the front of the precooling chamber body (1). A secondary precooling pipe (314) is fixedly connected to the inner wall of the left side of the upper end of the precooling chamber body (1). The air inlet at the left end of the secondary precooling pipe (314) and the air outlet at the front end of the filter cartridge (313) are both connected to a circulating air pipe (315).

7. A concrete aggregate precooling device according to claim 6, characterized in that, The material guiding assembly (4) includes several inner resistance strips (401), which are fixedly connected to the inner wall of the middle roller (305). Several steel balls (402) are installed in the inner cavity of the middle roller (305), and an outer sealing plug (403) with a handle is threadedly connected to the outer surface of the left end of the middle roller (305).

8. A concrete aggregate precooling device according to claim 7, characterized in that, A guide plate (404) is fixedly connected to the bottom of the rear surface of the inner cavity of the precooling chamber body (1). An arc-shaped guide plate (405) is fixedly connected to the bottom of the guide plate (404) and the precooling chamber body (1) on the side closest to each other. A discharge pipe (406) is connected to the front of the lower left side of the precooling chamber body (1). A lower roller shaft (407) is rotatably connected to the front of the lower right side of the precooling chamber body (1) through a bearing. An auger blade (408) is fixedly connected to the surface of the left end of the lower roller shaft (407). A lower motor (409) is fixedly installed to the front of the lower right side of the precooling chamber body (1). The output shaft of the lower motor (409) on the left end and the right end of the lower roller shaft (407) are fixedly connected through a coupling.

9. A concrete aggregate precooling device according to claim 8, characterized in that, The lower two sides of the precooling chamber body (1) are connected to a driven shaft (410) via bearings. The left end of the driven shaft (410) has a curved array of several guide rubber rods (411). The middle roller (305) and the right end of the driven shaft (410) are both fixedly mounted with a transmission sprocket (412). The surface of the transmission sprocket (412) is meshed with a transmission chain (413).

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