Drying equipment for sand-gravel materials

Abstract

The utility model relates to the technical field of sandstone material drying equipment, in particular to sandstone material drying equipment which comprises a fixing frame, a feeding hopper is arranged at the top of the fixing frame, and a rotatable rotating cylinder is arranged at the bottom of the feeding hopper; a first drying mechanism capable of stirring and drying materials is arranged in the rotating cylinder, a second drying mechanism capable of drying the materials is arranged in the communicating cylinder, and a scattering mechanism capable of scattering the materials is arranged in the communicating cylinder; a third drying mechanism capable of drying the materials is arranged in the material falling barrel, the first drying mechanism is arranged in the rotating barrel, and the materials are preliminarily stirred and dried through an air heater and an air injection barrel; a second drying mechanism in the communicating cylinder and an electric heating fan at the top are communicated, so that the materials are further dried; and the third drying mechanism in the material falling barrel enables the materials to be continuously heated and dried in the falling process, and the drying efficiency is greatly improved through the multi-stage drying mode.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of sand and gravel drying equipment, in particular to sand and gravel drying equipment. BACKGROUND

[0002] At present, in many engineering fields such as construction and road, sand and gravel is an indispensable basic material, however, during the mining, transportation and storage of sand and gravel, a large amount of water is often adsorbed, and the damp sand and gravel will cause many problems. First, for concrete production, sand and gravel with high water content will make it difficult to accurately control the water-cement ratio of concrete, thereby affecting the strength, durability and other properties of concrete, which may make the quality of the building structure unable to meet the design requirements, and increase the safety hazard. Secondly, in road paving, wet sand and gravel will affect the bonding effect of asphalt and sand and gravel, reduce the flatness and service life of the road, and easily cause diseases such as potholes and loose, and increase the maintenance cost in the later period. The damp sand and gravel is easy to be caked during storage, which is not only not conducive to loading and unloading and transportation, but also may block the storage equipment and conveying pipeline, and reduce the production efficiency. At present, the traditional sand and gravel drying methods mainly include natural airing and simple drying equipment drying. The natural airing is limited by weather conditions, has long drying time, wide occupied area and low efficiency, and cannot meet the needs of large-scale industrial production. The simple drying equipment usually has problems such as uneven drying, low energy utilization rate and easy to cause excessive wear of sand and gravel, and it is difficult to ensure the drying quality of sand and gravel and the continuity of production. Therefore, it has important practical significance to develop a drying equipment which is efficient, uniform, energy-saving and can ensure the quality of sand and gravel.

[0003] Therefore, the application provides a sand and gravel drying equipment which can quickly dry sand and gravel to solve the problems in the background art. CONTENT OF THE UTILITY MODEL

[0004] In order to improve the drying efficiency of sand and gravel, the application provides a sand and gravel drying equipment.

[0005] The application provides a sandstone drying equipment, which adopts the following technical scheme: a fixed frame is arranged, the top of the fixed frame is provided with a feeding hopper, the bottom of the feeding hopper is provided with a feeding opening, the bottom of the feeding hopper is provided with a rotatable rotating cylinder, a plurality of pushing protrusions are arranged on the inner wall of the rotating cylinder, the inside of the rotating cylinder is provided with a first drying mechanism which can stir and dry the material, the middle of the fixed frame is provided with a communication cylinder in the up-down direction, the inside of the communication cylinder is provided with a second drying mechanism which can dry the material, the top of the communication cylinder is provided with an electric heating fan, the inside of the communication cylinder is provided with a scattering mechanism which can scatter the material, the fixed frame is provided with a discharging cylinder, the bottom of the discharging cylinder is provided with a discharging opening, the inside of the discharging cylinder is provided with a third drying mechanism which can dry the material, the fixed frame is provided with a first motor, the output end of the first motor is provided with a driving pulley, the rotating cylinder is provided with a driven pulley which is connected with the driving pulley through a belt.

[0006] Optionally, the first drying mechanism comprises a jet cylinder, a plurality of jet rods are arranged on the jet cylinder, a jet hole is arranged on each jet rod, a hot air blower is arranged on the fixed frame, and the output end of the hot air blower is communicated with the jet cylinder.

[0007] Optionally, the scattering mechanism comprises a second rotating rod, a plurality of scattering rods are arranged on the second rotating rod, the second rotating rod is rotatably connected in the communication cylinder, the top of the communication cylinder is provided with a second motor, and the output end of the second motor is fixedly connected with the second rotating rod.

[0008] Optionally, the third drying mechanism comprises an electric heating plate, the inside of the discharging cylinder is provided with a movable electric heating plate, the electric heating plate is provided with a vortex-shaped flow guide channel, the inside of the discharging cylinder is provided with a vibrating mechanism which can vibrate the electric heating plate, the bottom of the second rotating rod is provided with a transmission rod, a transmission hole is arranged on the electric heating plate, the transmission rod is inserted into the transmission hole and can move in the transmission hole, the middle of the discharging cylinder is provided with a conical block below the communication cylinder, a gap for the material to pass through is arranged between the conical block and the communication cylinder, and the conical block is located in the middle of the flow guide channel.

[0009] Optionally, the vibrating mechanism comprises a rotatable third rotating rod, the third rotating rod is located in the discharging cylinder, rotating cams are arranged on the two sides of the third rotating rod, respectively, the inside of the discharging cylinder is provided with an annular connecting plate, a plurality of fixed rods are arranged on the annular connecting plate, a compression spring is arranged on each fixed rod, the other end of the compression spring is fixed in the discharging cylinder, and the rotating cams are in contact with the annular connecting plate.

[0010] In summary, the application has the following beneficial technical effects:

[0011] 1. By setting the first drying mechanism in the rotating cylinder, the material is preliminarily stirred and dried by using the hot air blower and the air jet cylinder. The material is continuously turned over in the rotating cylinder, increasing the contact area and time with hot air. The second drying mechanism in the connecting cylinder and the electric heating fan at the top further dry the material. The third drying mechanism in the discharging cylinder, especially the design of the vortex flow guide channel and the vibration mechanism, allows the material to be continuously heated and dried during the falling process. The multi-stage drying method greatly improves the drying efficiency, quickly and effectively removes the moisture in the sand and gravel, and meets the requirements of industrial production for the drying speed of sand and gravel.

[0012] 2. The designs of the pushing protrusion in the rotating cylinder, the scattering mechanism in the connecting cylinder, and the conical block and vibrating electric heating plate in the discharging cylinder continuously turn, scatter, and disperse the material from the moment the material enters the device, ensuring that the material is evenly heated during the entire drying process and avoiding local insufficient or excessive drying, thereby ensuring the quality stability of the dried sand and gravel and improving the product qualification rate, which is beneficial to the construction quality control of subsequent projects. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the overall structure of the device Figure I ;

[0014] Figure 2 is the overall structure of the device Figure II ;

[0015] Figure 3 is the top view of the device

[0016] Figure 4 is the cross-sectional view of the device

[0017] Figure 5 is the component diagram of the discharging cylinder of the device

[0018] 1, fixed frame, 2, feeding hopper, 3, feeding port, 4, rotating cylinder, 5, pushing protrusion, 6, first drying mechanism, 7, connecting cylinder, 8, second drying mechanism, 9, electric heating fan, 10, scattering mechanism, 11, discharging cylinder, 12, discharging port, 13, third drying mechanism, 14, first motor, 15, driving pulley, 16, driven pulley, 17, air jet cylinder, 18, air jet rod, 19, air jet hole, 20, hot air blower, 21, second rotating rod, 22, scattering rod, 23, second motor, 24, electric heating plate, 25, flow guide channel, 26, vibration mechanism, 27, transmission rod, 28, transmission hole, 29, conical block, 30, gap, 31, third rotating rod, 32, rotating cam, 33, annular connecting plate, 34, fixed rod, 35, compression spring. DETAILED DESCRIPTION

[0019] Further details of the present application are described below in conjunction with the accompanying drawings, in the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0020] Referring to Figure 1 , Figure 4 An embodiment is as follows: a drying equipment for sand and gravel includes a fixed frame 1 made of metal material (such as a steel beam welded together), which provides a stable support frame structure for the entire equipment, ensuring the relative position stability of each component during operation, a feed hopper 2 is welded on the top of the fixed frame 1, the bottom inlet 3 is precisely aligned with the top opening of the rotating cylinder 4, ensuring the smoothness of the material entering, the rotating cylinder 4 is rotatably connected to the bottom of the feed hopper 2 through a bearing, realizing the flexible rotation of the rotating cylinder 4, the rotating cylinder 4 can rotate, the pushing protrusions 5 on the inner wall can push the material to move, making the material continuously tumble in the rotating cylinder 4, the first drying mechanism 6 is arranged in the rotating cylinder 4, which can stir and dry the material, the middle of the fixed frame 1 is fixedly installed with a communication cylinder 7, the communication cylinder 7 is arranged in the vertical direction, providing a channel for the material from the rotating cylinder 4 to the discharging cylinder 11, and the second drying mechanism 8 in the communication cylinder 7 can dry the material, the electric heating fan 9 fixedly arranged on the top of the communication cylinder 7 can blow hot air to the material, further assisting drying, the scattering mechanism 10 in the communication cylinder 7 is used to scatter the material to prevent clumping and ensure uniform drying, the discharging cylinder 11 is fixedly installed on the fixed frame 1, the discharge port 12 at the bottom is used to discharge the dried material, the third drying mechanism 13 in the discharging cylinder 11 performs the final drying treatment on the material, the first motor 14 is fixedly arranged on the fixed frame 1, the driving pulley 15 at the output end is connected to the driven pulley 16 on the rotating cylinder 4 through a belt, realizing power transmission and driving the rotating cylinder 4 to rotate. The implementation principle of the above embodiment is as follows: when the equipment is running, the first motor 14 is started, the rotating cylinder 4 is driven to rotate through belt transmission, the material enters the rotating cylinder 4 from the feed hopper 2 through the inlet 3, the rotation of the rotating cylinder 4 makes the pushing protrusions 5 push the material to tumble, at the same time, the first drying mechanism 6 starts to stir and dry the material, the material is preliminarily dried in the rotating cylinder 4, then enters the communication cylinder 7, in the communication cylinder 7, the second drying mechanism 8 and the electric heating fan 9 further dry the material, the scattering mechanism 10 scatters the material to ensure that the material is fully exposed to heat, finally, the material enters the discharging cylinder 11, is finally dried by the third drying mechanism 13, and is discharged from the discharge port 12.

[0021] Referring to Figure 3 An embodiment shown in the above is that the first drying mechanism 6 includes a jet cylinder 17 and a plurality of jet rods 18, the jet cylinder 17 is fixed on the central axis inside the rotating cylinder 4 by welding or bolt connection, etc., and rotates synchronously with the rotating cylinder 4, which ensures the stability of the jet cylinder 17 during the rotation of the rotating cylinder 4 and prevents displacement or shaking, thereby ensuring the uniformity and accuracy of hot air injection, the jet rods 18 are evenly distributed on the jet cylinder 17 by welding, which ensures the firmness of the jet rods 18 and the consistency of the direction of the jet holes 19, so that hot air can be uniformly sprayed to the material from all directions, and the heat blower 20 is bolted on the fixed frame 1, the output end of the heat blower 20 is communicated with the jet cylinder 17 through a flexible pipe with high temperature resistance, which ensures that hot air is stably delivered into the jet cylinder 17 to provide a heat source for the stirring and drying of the material. The implementation principle of the above embodiment is that during the operation of the equipment, the hot air generated by the heat blower 20 enters the jet cylinder 17 through the flexible pipe, and due to the stable connection and reasonable distribution of the jet cylinder 17 and the jet rods 18, the hot air can be uniformly sprayed from the jet holes 19 on the jet rods 18 and fully contact with the material in the rotating cylinder 4 to heat and dry the material.

[0022] Referring to Figures 1-5 An embodiment shown in the above is that the scattering mechanism 10 includes a second rotating rod 21 and a plurality of scattering rods 22, the second rotating rod 21 is connected in the communicating cylinder 7 through a bearing, the upper and lower ends of the bearing are tightly matched with the upper and lower walls of the communicating cylinder 7, respectively, which ensures that the second rotating rod 21 can rotate flexibly and stably in the communicating cylinder 7, reduces the friction resistance, and improves the rotation efficiency, and a plurality of scattering rods 22 are evenly distributed on the second rotating rod 21 by welding, which ensures the stability of the scattering rods 22 during the rotation and the scattering effect on the material, and the top of the communicating cylinder 7 is bolted with a second motor 23, the output shaft of the second motor 23 is fixedly connected with the upper end of the second rotating rod 21 through a coupling, the bolt connection facilitates the installation and maintenance of the second motor 23, and the coupling can accurately transmit power, so that the rotation of the second motor 23 can efficiently drive the rotation of the second rotating rod 21, and then drive the scattering rods 22 to scatter the material. The implementation principle of the above embodiment is that when the material enters the communicating cylinder 7 from the rotating cylinder 4, the second motor 23 is started, and the power is transmitted to the second rotating rod 21 through the coupling, the second rotating rod 21 drives the scattering rods 22 to rotate, and due to the uniform distribution and stable connection of the scattering rods 22, the material can be effectively scattered to prevent the material from caking.

[0023] Referring to Figure 4 , Figure 5An embodiment is shown as follows: the third drying mechanism 13 comprises an electric heating plate 24, and a vortex-shaped flow guide channel 25 is fixedly connected to the electric heating plate 24, so that the material can move out of the flow guide channel 25 under the action of centrifugal force along with the rotation of the electric heating plate 24, prolong the residence time of the material on the electric heating plate 24, and enhance the drying effect; the bottom of the second rotating rod 21 is welded with a transmission rod 27, a transmission hole 28 is formed in the corresponding position of the electric heating plate 24, the transmission rod 27 is inserted into the transmission hole 28 and can move in the transmission hole 28, and the gap 30 between the transmission rod 27 and the transmission hole 28 cooperates to enable the second rotating rod 21 to drive the electric heating plate 24 to rotate synchronously when the second rotating rod 21 rotates; the middle part of the material dropping cylinder 11 is fixed with a conical block 29 below the communicating cylinder 7 by welding or bolt connection, the gap 30 for the material to pass through is reserved between the conical block 29 and the communicating cylinder 7, the conical block 29 is located in the middle part of the flow guide channel 25, the top of the conical block 29 corresponds to the opening at the bottom of the communicating cylinder 7, and the welding or bolt connection ensures the stability of the conical block 29; the design of the conical block 29 can make the material evenly distributed in the flow guide channel 25 after entering the material dropping cylinder 11 from the communicating cylinder 7, preventing the material from accumulating in one place and ensuring the uniformity of drying. The implementation principle of the above embodiment is as follows: when the material enters the material dropping cylinder 11, the electric heating plate 24 heats and dries the material; since the vortex-shaped flow guide channel 25 is arranged on the electric heating plate 24, the material moves along the flow guide channel 25 and moves out of the electric heating plate 24, prolonging the contact time of the material with the electric heating plate 24 and enhancing the drying effect; at the same time, the transmission rod 27 at the bottom of the second rotating rod 21 drives the electric heating plate 24 to rotate along with the rotation of the second rotating rod 21, so that the material is more dispersed in the flow guide channel 25, improving the uniformity of drying; the conical block 29 can make the material evenly distributed in the flow guide channel 25 after entering the material dropping cylinder 11 from the communicating cylinder 7, preventing the material from accumulating in one place and affecting the drying effect.

[0024] Referring to Figure 4 , Figure 5The third rotating rod 31 is rotatably connected in the blanking cylinder 11 through a bearing, the bearing is installed to ensure the rotating flexibility of the third rotating rod 31 in the blanking cylinder 11, reduce the friction resistance, improve the rotating efficiency, the rotating cam 32 is fixed on the two sides of the third rotating rod 31 through welding or key connection respectively, the firm connection of the rotating cam 32 and the third rotating rod 31 is guaranteed, the rotating cam 32 can rotate with the third rotating rod 31, the annular connecting plate 33 is arranged in the blanking cylinder 11 and can move up and down, a plurality of fixed rods 34 are uniformly distributed on the annular connecting plate 33 through welding, the top of each fixed rod 34 is fixed with the compression spring 35, one end of the compression spring 35 is welded with the annular connecting plate 33, and the other end is welded on the corresponding position on the inner wall of the blanking cylinder 11, the rotating cam 32 is in contact with the annular connecting plate 33, when the third rotating rod 31 rotates, the rotating cam 32 drives the annular connecting plate 33 to move up and down, due to the elastic effect of the compression spring 35, the annular connecting plate 33 vibrates, and then drives the electric heating plate 24 connected with the annular connecting plate 33 to vibrate, the annular connecting plate 33 and the electric heating plate 24 are relatively rotatably connected. The implementation principle of the above embodiment is that in the equipment operation process, the third rotating rod 31 rotates, drives the rotating cam 32 to rotate, the rotating of the rotating cam 32 periodically drives the annular connecting plate 33, since the annular connecting plate 33 is connected with the blanking cylinder 11 through the fixed rod 34 and the compression spring 35, the elasticity of the compression spring 35 makes the annular connecting plate 33 vibrate, the vibration is transmitted to the electric heating plate 24, so that the electric heating plate 24 continuously vibrates during work, the vibration of the electric heating plate 24 can avoid the material from being accumulated and blocked in the flow guide channel 25 of the electric heating plate 24, ensures that the material can smoothly pass through the flow guide channel 25, also enhances the contact effect between the material and the electric heating plate 24, improves the drying efficiency and uniformity, guarantees the stable operation of the equipment and the smooth progress of the drying process, and further improves the reliability and drying performance of the whole equipment.

[0025] The working principle of the device is that when the sand and stone drying equipment works, first, start the first motor 14, the second motor 23, the hot air blower 20 and the electric heating fan 9 and other equipment, the sand and stone material enters the rotating cylinder 4 from the feeding hopper 2, and is preliminarily dried under the action of the rotating cylinder 4 and the first drying mechanism 6, then enters the communicating cylinder 7, is further dried by the second drying mechanism 8 after being scattered by the scattering mechanism 10, and finally enters the blanking cylinder 11, and is discharged after completing the final drying by the third drying mechanism 13. In the whole process, the drying mechanisms work cooperatively, remove the water in the sand and stone material in a high-efficiency and uniform manner through hot air heating, material turning, scattering and flow guiding, realize the rapid drying of the sand and stone material, and provide high-quality dried sand and stone material for subsequent engineering application.

[0026] The working principle of the device has been described through the above-mentioned embodiments, and the above-mentioned embodiments only express several implementation manners of the device, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A drying apparatus for sand and gravel, comprising a fixed frame (1), characterized in that: The top of the fixed frame (1) is provided with a feeding hopper (2), the bottom of the feeding hopper (2) is provided with a feeding port (3), the bottom of the feeding hopper (2) is provided with a rotatable rotating cylinder (4), a plurality of pushing protrusions (5) are formed in the inner wall of the rotating cylinder (4), the inside of the rotating cylinder (4) is provided with a first drying mechanism (6) capable of stirring and drying the material, the middle of the fixed frame (1) is provided with a communication cylinder (7) in the up-down direction, the inside of the communication cylinder (7) is provided with a second drying mechanism (8) capable of drying the material, the top of the communication cylinder (7) is provided with an electric heating fan (9), the inside of the communication cylinder (7) is provided with a scattering mechanism (10) capable of scattering the material, the fixed frame (1) is provided with a discharging cylinder (11), the bottom of the discharging cylinder (11) is provided with a discharging port (12), the inside of the discharging cylinder (11) is provided with a third drying mechanism (13) capable of drying the material, the fixed frame (1) is provided with a first motor (14), the output end of the first motor (14) is provided with a driving pulley (15), the rotating cylinder (4) is provided with a driven pulley (16) connected with the driving pulley (15) through a belt.

2. The drying apparatus for sand and gravel according to claim 1, characterized in that: The first drying mechanism (6) comprises a jet cylinder (17), a plurality of jet rods (18) are arranged on the jet cylinder (17), a jet hole (19) is formed in each of the jet rods (18), and a hot air blower (20) is arranged on the fixed frame (1) and communicated with the jet cylinder (17).

3. The drying apparatus for sand and gravel according to claim 1, characterized in that: The scattering mechanism (10) comprises a second rotating rod (21), a plurality of scattering rods (22) are arranged on the second rotating rod (21), and the second rotating rod (21) is rotatably connected in the communication cylinder (7); the top of the communication cylinder (7) is provided with a second motor (23), and the output end of the second motor (23) is fixedly connected with the second rotating rod (21).

4. The drying apparatus for sand and gravel according to claim 3, characterized in that: The third drying mechanism (13) comprises an electric heating plate (24), the electric heating plate (24) is movably arranged in the discharging cylinder (11), the electric heating plate (24) is provided with a vortex-shaped flow guide channel (25), the discharging cylinder (11) is provided with a vibrating mechanism (26) capable of vibrating the electric heating plate (24), the bottom of the second rotating rod (21) is provided with a transmission rod (27), the electric heating plate (24) is provided with a transmission hole (28), the transmission rod (27) is inserted into and movable in the transmission hole (28), the middle of the discharging cylinder (11) is provided with a tapered block (29) below the communication cylinder (7), a gap (30) for the material to pass through is formed between the tapered block (29) and the communication cylinder (7), and the tapered block (29) is located in the middle of the flow guide channel (25).

5. The drying apparatus for sand and gravel according to claim 4, characterized in that: Said vibrating mechanism (26) includes rotatable third rotating rod (31), third rotating rod (31) is located in blanking cylinder (11), both sides of third rotating rod (31) are provided with rotating cam (32) respectively, annular connecting plate (33) is provided in blanking cylinder (11), a plurality of fixed rods (34) are provided on annular connecting plate (33), a compression spring (35) is provided on each fixed rod (34), the other end of compression spring (35) is fixed in blanking cylinder (11), rotating cam (32) is connected with annular connecting plate (33) in contact.

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