A screening device for highway engineering construction

Abstract

The present invention belongs to the technical field of highway construction, and specifically refers to a screening device for highway engineering construction, including a base, an aggregate assembly, a feed screening assembly, a feeder and a control system. The present invention forms a four-stage screening structure by setting a feed screening assembly, a screen sleeve at the lower end of a feed barrel and screen plates stacked up and down. The rotation of the incomplete gear can drive the control gears arranged from bottom to top to rotate in sequence, so that the screen plates are moved away from the bottom of the feed barrel in sequence. The original gravel in the feed barrel is screened by the step-by-step fine screen holes and primary screen holes arranged from bottom to top under the stirring of the stirring blades and the vibration of the vibrator, so as to realize the screening function of gravel with different particle sizes; the rotation process of the aggregate barrel and the rotation process of the screen plate are carried out synchronously, so that the gravel with different particle sizes screened out falls into different aggregate barrels respectively, and the technical effect of automatically collecting gravel with different particle sizes is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of highway construction, and in particular relates to a screening device for highway engineering construction. Background Art

[0002] During the construction of highway projects, the quality of construction materials is directly related to the durability and safety of the highway. Therefore, strict screening of construction materials is an important part of ensuring the quality of the project. In the actual highway construction process, it is necessary to determine the particle size range of aggregates according to highway design requirements and construction specifications. For example, graded crushed stone used for the base and subbase of secondary and above highways needs to be pre-screened into several groups of crushed stone with different particle sizes (37.5~19mm, 19~9.5mm, 9.5~4.75mm and stone chips below 4.75mm).

[0003] The original crushed stone material is usually mixed with a variety of crushed stone particle size specifications, so it is necessary to grade and screen the crushed stone through screeners with different apertures, so as to obtain crushed stone of each grade specified by the particle size distribution, so as to ensure the stability and strength of the engineering construction. However, the existing multi-stage screeners generally screen the crushed stone by stacking multiple layers of sieve cylinders with sieves or sieve holes on the bottom layer. However, the screened crushed stone of each grade remains above the sieves or sieve holes. When in use, the sieves or sieve holes need to be removed to obtain the crushed stone material, which is time-consuming and labor-intensive. The stacking of the layers of sieve cylinders makes the device high, which is inconvenient to carry and use, and it is impossible to detect the weight of the screened crushed stone of each grade in real time.

[0004] Therefore, it is necessary to propose a screening device for highway engineering construction to solve the technical problems existing in the existing crushed stone grading and screening process. Summary of the invention

[0005] The present invention overcomes the shortcomings of the prior art and provides a screening device for highway engineering construction. A four-stage screening structure is formed by arranging a feed screening assembly, a screen sleeve at the lower end of a feed barrel and screen plates stacked up and down. The rotation of the incomplete gear can drive the control gears arranged from bottom to top to rotate in sequence, so that the screen plates are moved away from the bottom of the feed barrel in sequence. The original crushed stone in the feed barrel is screened by the step-by-step fine screening holes and the primary screening holes arranged from bottom to top in sequence under the stirring of the stirring blades and the vibration of the vibrator, so as to realize the screening function of crushed stone with different particle sizes. When the rotating disk rotates, the active rotating wheel drives the driven rotating wheel to rotate, so that the rotating rod and the incomplete gear rotate synchronously, so that the rotation process of the collecting barrel and the rotation process of the screen plate are carried out synchronously, so that each collecting barrel is respectively opposite to each screen plate one by one up and down, so that the crushed stone with different particle sizes screened out falls into different collecting barrels respectively, so as to realize the technical effect of automatically collecting crushed stone with different particle sizes.

[0006] The technical solution adopted by the present invention is as follows: The present invention provides a screening device for highway engineering construction, including a base, the upper wall of the base is provided with an aggregate assembly, a feed sub-screening assembly and a loader, the aggregate assembly is arranged at one end of the upper wall of the base, the loader is arranged at the other end of the upper wall of the base, the feed sub-screening assembly is arranged between the aggregate assembly and the loader, a control system is arranged on one side of the base, the upper wall of the base is provided with a main support frame, a first support rod and a second support rod, the main support frame is arranged on a side of the aggregate assembly close to the loader, the first support rod is arranged on a side of the main support frame away from the aggregate assembly, and the second support rod is arranged on a side of the first support rod away from the aggregate assembly A driven rotating wheel is rotatably provided on the upper wall of the base, and the driven rotating wheel is arranged on one side of the first supporting rod. A rotating rod is fixedly provided at the center of the upper wall of the driven rotating wheel. The feed screening assembly comprises a feed barrel, a control gear, a sieve plate, an incomplete gear and a limit ring. The feed barrel is fixedly provided on the upper end of the main support frame, and the control gear vertical array is coaxially rotatably sleeved on the upper end outer wall of the first supporting rod. The sieve plates are respectively fixed on the side walls of the control gear, and the incomplete gear vertical array is fixedly provided on the upper end side walls of the rotating rod. The limit ring vertical array is fixedly provided on the upper end of the second supporting rod, and the limit ring is arranged around the feed barrel, the control gear, the sieve plate and the incomplete gear.

[0007] Furthermore, the number of the control gear, screen plate, incomplete gear and limit ring is three respectively, the control gear and the screen plate are arranged in a one-to-one correspondence, the incomplete gear and the control gear are arranged in a one-to-one correspondence, the teeth of the incomplete gear mesh with the control gear when moving to the control gear, a connecting plate is fixedly connected between the screen plate and the side wall of the control gear, a sliding sleeve is provided on the side wall of the screen plate away from the control gear, and the sliding sleeve is mounted on the limit ring, and when the sliding sleeve is located at one end of the limit ring close to the aggregate assembly, the screen plate is located directly below the feed barrel.

[0008] Furthermore, the upper wall of the sieve plate is evenly provided with step-by-step fine sieve holes, which are square in shape. The sizes of the step-by-step fine sieve holes on the sieve plates arranged from bottom to top are arranged from small to large. When all the sieve plates are overlapped up and down, the horizontal projection shape of the step-by-step fine sieve holes at the bottom is contained within the horizontal projection shape of the step-by-step fine sieve holes at the top.

[0009] Furthermore, a screen sleeve is threadedly connected to the lower end of the feed barrel, and when the screen plate at the upper end is below the feed barrel, the upper wall of the screen plate at the upper end is movably fitted with the lower wall of the screen sleeve, and the lower wall of the screen sleeve is evenly provided with primary screening holes, and the primary screening holes are square. When the screen plate at the upper end is fitted to the lower wall of the screen sleeve, the horizontal projection shape of the uppermost step-by-step fine screening holes is contained within the horizontal projection shape of the primary screening holes.

[0010] Furthermore, a material guide hopper is connected to the upper opening of the feed barrel, a conveying end of the loader is arranged above the material guide hopper, a vibrator is provided at the lower end of the inner side wall of the feed barrel, and the vibrator is in contact with the lower wall of the screen jacket.

[0011] Furthermore, the material collecting assembly includes a material collecting barrel, a rotating disk and a material dividing assembly, the rotating disk is rotatably arranged at one end of the upper wall of the base, the material collecting barrel annular array is arranged on the upper wall of the rotating disk, the number of the material collecting barrels is four, the material dividing assembly is arranged above the material collecting barrel, and a third supporting rod is fixedly provided at the center of the upper wall of the rotating disk, the material dividing assembly includes a material guiding barrel and a material guiding slope, the number of the material guiding barrels is four, the material guiding barrel annular array is fixedly provided at the upper end of the third supporting rod, the material guiding barrels are respectively arranged opposite to the material collecting barrel up and down, the material guiding slope annular array is connected between the side walls of adjacent material guiding barrels, the material guiding slope is inclined in a counterclockwise direction from high to low, a material guiding port is opened at the upper end of the side wall of the material guiding barrel, the lowest end of the material guiding slope is connected to the lower edge of the material guiding port, and baffle plates are respectively provided at the edges of the material guiding slope.

[0012] Furthermore, a driving wheel is fixedly provided at the center of the lower wall of the rotating disk, and the driving wheel is rotatably provided on the upper wall of the base. A synchronous belt is provided around the side walls of the driving wheel and the driven wheel. A placement groove is embedded in the circular array on the upper wall of the rotating disk. There are four placement grooves. The lower ends of the collecting barrels are respectively engaged in the placement grooves. Weighing sensors are respectively provided on the inner upper walls of the placement grooves. The weighing sensors are in contact with the lower wall of the collecting barrel. When the rotating disk rotates, the material guide barrel is respectively arranged opposite to the feed barrel up and down.

[0013] Furthermore, a top support frame is provided on the upper wall of the main support frame, and the upper wall of the top support frame is provided above the guide hopper. A stirring motor is provided on the upper wall of the top support frame, and a stirring rod is rotatably provided at the center of the lower wall of the stirring motor. The output end of the stirring motor is connected to the upper end of the stirring rod, and the stirring rod is rotatably provided at the internal center axis position of the feed barrel. The side walls of the stirring rod are provided with stirring blades, and the stirring blades are spirally arranged.

[0014] Furthermore, a secondary support frame is provided on the side of the upper end of the main support frame away from the aggregate assembly, the upper end of the first support rod is fixedly connected to the secondary support frame, the upper end of the rotating rod is rotatably connected to the secondary support frame, the side wall of the main support frame close to the limiting ring is provided with a fixed block, the limiting rings are respectively fixed on the fixed block, the lower wall of the base is provided with a rotating motor, and the output end of the rotating motor is connected to the rotating shaft of the driving wheel.

[0015] Furthermore, when the rotating disk rotates, the active wheel drives the driven wheel, the rotating rod and the incomplete gear to rotate together, and the material guide cylinder is opposite to the feed cylinder in turn. When the incomplete gear rotates, the control gears from bottom to top rotate in turn, and the screen plate from bottom to top rotates from directly below the screen jacket to the side away from the aggregate assembly in turn, and the material guide cylinder is opposite to the screen plate and the lower wall of the screen jacket arranged from bottom to top in turn.

[0016] Furthermore, the rotating motor, weighing sensor, stirring motor, vibrator and feeder are electrically connected to the control system through wires respectively.

[0017] Furthermore, the control system adopts a Siemens S7-1200 programmable controller, the vibrator adopts a GT-20 pneumatic vibrator, and the weighing sensor adopts an EVT-20F column sensor.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows:

[0019] (1) By setting up the feed screening assembly, the screen sleeve at the lower end of the feed barrel and the screen plates stacked up and down form a four-stage screening structure. The rotation of the incomplete gear can drive the control gears arranged from bottom to top to rotate in sequence, so that the screen plates are moved away from the bottom of the feed barrel in sequence. The original crushed stone in the feed barrel is screened in sequence through the step-by-step fine screen holes and primary screen holes arranged from bottom to top under the stirring of the stirring blades and the vibration of the vibrator, thereby realizing the screening function of crushed stones of different particle sizes;

[0020] (2) When the rotating disk rotates, the active rotating wheel drives the driven rotating wheel to rotate, so that the rotating rod and the incomplete gear rotate synchronously, so that the rotation process of the collecting barrel and the rotation process of the screen plate are synchronized, so that each collecting barrel is respectively opposite to each screen plate up and down, so that the crushed stones of different particle sizes screened out fall into different collecting barrels respectively, and the technical effect of automatically collecting crushed stones of different particle sizes is achieved;

[0021] (3) The weighing sensor installed on the upper wall of the rotating disk can detect the gradually increasing weight of the crushed stones inside the aggregate barrel, which helps users to obtain the weight of crushed stones with different particle sizes and facilitates the subsequent control of the particle size distribution range of graded crushed stones;

[0022] (4) The material dividing assembly is arranged between the collecting barrel and the feeding barrel, and plays a transitional role in the crushed stone screening process. When the rotating disk drives the collecting barrel to rotate, the lower screen plate moves away from the bottom of the feeding barrel, and the size of the step-by-step fine screening holes of the upper screen plate is larger, which may cause the crushed stones in the feeding barrel to fall through the step-by-step fine screening holes. However, at this time, the collecting barrel below is not opposite to the feeding barrel in vertical direction, which may cause the crushed stones to fall out of the collecting barrel, causing material loss. The setting of the guide slope can make part of the scattered crushed stones slide along the guide slope to the collecting barrel at the next position, thereby solving the problem of the crushed stones falling outside the collecting barrel and ensuring that the crushed stones of various particle sizes can be fully collected in the collecting barrel;

[0023] (5) When the screen plate and the lower wall of the screen sleeve are opposite to each other, the horizontal projection shape of the upper layer of the fine screen holes can include the horizontal projection shape of the lower layer of the fine screen holes, and the horizontal projection shape of the primary screen holes can include the horizontal projection shape of the uppermost layer of the fine screen holes. During the screening process, the crushed stone will be screened within the size limit of the lowermost layer of the fine screen holes. As the lower screen plate is gradually removed, the crushed stone in the feed barrel will pass through the gradually increasing size of the fine screen holes in turn, thereby achieving the effect of graded screening of crushed stone of different particle sizes. Compared with the traditional form of stacking multiple layers of screen barrels, the structure is more centralized, reducing the area occupied by the equipment, facilitating the collection of crushed stone aggregates, and saving time and effort.

[0024] (6) The sieve plate is slidably connected to the limit ring through a sliding sleeve. The limit ring provides support for the sieve plate and increases the stability of the sieve plate during the screening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a first structural schematic diagram of a screening device for highway engineering construction proposed by the present invention;

[0026] Figure 2 This is a second structural schematic diagram of a screening device for highway engineering construction proposed by the present invention;

[0027] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0028] Figure 4 A third structural schematic diagram of a screening device for highway engineering construction proposed by the present invention;

[0029] Figure 5 It is a schematic diagram of the connection structure of the driving wheel, the synchronous belt and the driven wheel;

[0030] Figure 6 is a schematic diagram of the structure of the aggregate component;

[0031] Figure 7It is a schematic diagram of the structure of the screen sleeve, the control gear, the screen plate, the incomplete gear, the rotating rod and the driven runner;

[0032] Figure 8 It is a structural schematic diagram of the feed screening assembly;

[0033] Fig. 9 It is a schematic diagram of the structure of the feed barrel, guide hopper, stirring rod, stirring blade and stirring motor;

[0034] Fig.10 It is a cross-sectional view of a feed barrel, a guide hopper, a stirring rod, a stirring blade, a stirring motor and a vibrator;

[0035] Fig.11 Schematic diagram of horizontal projection of primary screening holes and each layer of progressive fine screening holes, wherein a represents the horizontal projection of primary screening holes, b represents the horizontal projection of the top layer progressive fine screening holes, c represents the horizontal projection of the middle layer progressive fine screening holes, and d represents the horizontal projection of the bottom layer progressive fine screening holes;

[0036] Fig.12 It is a cross-sectional view of the layers of screen plates and the lower wall of the screen jacket stacked up and down.

[0037] Among them, 1. base, 11. main support frame, 111. top support frame, 112. auxiliary support frame, 113. fixed block, 12. first support rod, 13. second support rod, 14. rotating motor, 2. collecting assembly, 21. collecting barrel, 22. rotating disk, 221. third support rod, 222. driving wheel, 2221. synchronous belt, 223. placement groove, 2231. weighing sensor, 23. material distribution assembly, 231. material guide barrel, 2311. material guide port, 232. material guide slope , 2321, material baffle, 3, feed screening assembly, 31, feed barrel, 311, screen sleeve, 3111, primary screening hole, 312, guide hopper, 313, stirring rod, 3131, stirring blade, 314, stirring motor, 315, vibrator, 32, control gear, 33, sieve plate, 331, connecting plate, 332, sliding sleeve, 333, step-by-step fine screening hole, 34, incomplete gear, 341, rotating rod, 342, driven wheel, 35, limit ring, 4, feeder, 5, control system. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0040] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 A screening device for highway engineering construction in this embodiment includes a base 1, and the upper wall of the base 1 is provided with an aggregate assembly 2, a feed screening assembly 3 and a loader 4, the aggregate assembly 2 is arranged at one end of the upper wall of the base 1, the loader 4 is arranged at the other end of the upper wall of the base 1, the feed screening assembly 3 is arranged between the aggregate assembly 2 and the loader 4, and a control system 5 is provided on one side of the base 1.

[0041] A main support frame 11, a first support rod 12 and a second support rod 13 are provided on the upper wall of the base 1. The main support frame 11 is provided on the side of the aggregate assembly 2 close to the loader 4, the first support rod 12 is provided on the side of the main support frame 11 away from the aggregate assembly 2, and the second support rod 13 is provided on the side of the first support rod 12 away from the aggregate assembly 2. A top support frame 111 is provided on the upper wall of the main support frame 11, and a secondary support frame 112 is provided on the side of the upper end of the main support frame 11 away from the aggregate assembly 2. The upper end of the first support rod 12 is fixedly connected to the secondary support frame 112, and a rotating motor 14 is provided on the lower wall of the base 1.

[0042] The material collecting assembly 2 includes a material collecting barrel 21, a rotating disk 22 and a material dividing assembly 23. The rotating disk 22 is rotatably arranged at one end of the upper wall of the base 1. The material collecting barrels 21 are arranged in an annular array on the upper wall of the rotating disk 22. The number of the material collecting barrels 21 is four. The material dividing assembly 23 is arranged above the material collecting barrel 21. A third supporting rod 221 is fixedly arranged at the center of the upper wall of the rotating disk 22. The material dividing assembly 23 includes a material guiding barrel 231 and a material guiding inclined surface 232. The number of the material guiding barrel 231 is four. The material guiding barrel 231 is annular. The array is fixedly arranged at the upper end of the third support rod 221, the guide cylinders 231 are respectively arranged opposite to the upper and lower material collecting cylinders 21, the guide slopes 232 are connected in a circular array between the side walls of the adjacent guide cylinders 231, the guide slopes 232 are arranged in a counterclockwise direction from high to low, the upper end of the side wall of the guide cylinder 231 is provided with a guide port 2311, the lowest end of the guide slope 232 is connected to the lower edge of the guide port 2311, and the edges of the guide slope 232 are respectively provided with baffle plates 2321;

[0043] A driving wheel 222 is fixedly provided at the center of the lower wall of the rotating disk 22. The driving wheel 222 is rotatably provided on the upper wall of the base 1. The output end of the rotating motor 14 is connected to the rotating shaft of the driving wheel 222. A placement groove 223 is embedded in a circular array on the upper wall of the rotating disk 22. There are four placement grooves 223. The lower ends of the collecting barrel 21 are respectively engaged in the placement grooves 223. The inner upper walls of the placement grooves 223 are respectively provided with weighing sensors 2231, and the weighing sensors 2231 are in contact with the lower wall of the collecting barrel 21.

[0044] The feed screening assembly 3 includes a feed barrel 31, a control gear 32, a sieve plate 33, an incomplete gear 34 and a limit ring 35. The feed barrel 31 is fixedly arranged on the upper end of the main support frame 11. The control gear 32 is vertically arrayed and coaxially rotatably sleeved on the upper end outer wall of the first support rod 12. The sieve plates 33 are respectively fixedly arranged on the side walls of the control gear 32. A driven rotating wheel 342 is rotatably arranged on the upper wall of the base 1. The driven rotating wheel 342 is arranged on one side of the first support rod 12. A synchronous belt 2221 is arranged around the side walls of the driving rotating wheel 222 and the driven rotating wheel 342. A rotating rod 341 is fixedly provided at the center of the upper wall of the driven rotating wheel 342, and an incomplete gear 34 is fixedly provided in a vertical array on the upper side wall of the rotating rod 341. The upper end of the rotating rod 341 is rotatably connected to the auxiliary support frame 112. A limiting ring 35 is fixedly provided in a vertical array on the upper end of the second supporting rod 13. The limiting ring 35 is arranged around the feed barrel 31, the control gear 32, the sieve plate 33 and the incomplete gear 34. A fixing block 113 is provided on the side wall of the main support frame 11 close to the limiting ring 35, and the limiting ring 35 is fixedly provided on the fixing block 113 respectively.

[0045] When the rotating disk 22 rotates, the material guide cylinder 231 is disposed opposite to the material feed cylinder 31 up and down;

[0046] The number of the control gear 32, the sieve plate 33, the incomplete gear 34 and the limit ring 35 are three respectively. The control gear 32 and the sieve plate 33 are arranged in a one-to-one correspondence, and the incomplete gear 34 and the control gear 32 are arranged in a one-to-one correspondence. When the teeth of the incomplete gear 34 move to the control gear 32, they mesh with the control gear 32. A connecting plate 331 is fixedly connected between the sieve plate 33 and the side wall of the control gear 32. A sliding sleeve 332 is arranged on the side wall of the end of the sieve plate 33 away from the control gear 32. The sliding sleeve 332 is sleeved on the limit ring 35. When the sliding sleeve 332 is located at one end of the limit ring 35 close to the aggregate assembly 2, the sieve plate 33 is located directly below the feed barrel 31.

[0047] The upper wall of the sieve plate 33 is evenly provided with step-by-step fine sieve holes 333, which are square in shape. The sizes of the step-by-step fine sieve holes 333 on the sieve plates 33 arranged from bottom to top are arranged from small to large. When all the sieve plates 33 are overlapped up and down, the horizontal projection shape of the step-by-step fine sieve holes 333 at the bottom is contained within the horizontal projection shape of the step-by-step fine sieve holes 333 at the top.

[0048] The lower end of the feed barrel 31 is threadedly connected with a screen sleeve 311. When the uppermost screen plate 33 is below the feed barrel 31, the upper wall of the uppermost screen plate 33 is movably fitted with the lower wall of the screen sleeve 311. The lower wall of the screen sleeve 311 is evenly provided with primary screening holes 3111. The primary screening holes 3111 are square. When the uppermost screen plate 33 is fitted to the lower wall of the screen sleeve 311, the horizontal projection shape of the uppermost progressive fine screening holes 333 is contained within the horizontal projection shape of the primary screening holes 3111.

[0049] The upper opening of the feed cylinder 31 is connected to a guide hopper 312, the conveying end of the feeder 4 is arranged above the guide hopper 312, and a vibrator 315 is arranged at the lower end of the inner side wall of the feed cylinder 31, and the vibrator 315 is in contact with the lower wall of the screen jacket 311;

[0050] The upper wall of the top support frame 111 is arranged above the guide hopper 312, and a stirring motor 314 is arranged on the upper wall of the top support frame 111. A stirring rod 313 is rotatably arranged at the center of the lower wall of the stirring motor 314. The output end of the stirring motor 314 is connected to the upper end of the stirring rod 313. The stirring rod 313 is rotatably arranged at the internal center axis position of the feeding barrel 31, and a stirring blade 3131 is arranged on the side wall of the stirring rod 313, and the stirring blade 3131 is spirally arranged.

[0051] When the rotating disk 22 rotates, the active wheel 222 drives the driven wheel 342, the rotating rod 341 and the incomplete gear 34 to rotate together, and the material guide cylinder 231 is opposite to the feed cylinder 31 in turn. When the incomplete gear 34 rotates, the control gear 32 from bottom to top rotates in turn, and the screen plate 33 from bottom to top rotates from directly below the screen jacket 311 to the side away from the aggregate assembly 2 in turn, and the material guide cylinder 231 is opposite to the screen plate 33 set from bottom to top and the lower wall of the screen jacket 311 in turn.

[0052] The rotating motor 14, the weighing sensor 2231, the stirring motor 314, the vibrator 315 and the feeder 4 are electrically connected to the control system 5 through wires respectively.

[0053] Working principle and workflow: In the initial state, all the sieve plates 33 are located below the feed barrel 31. At this time, the sieve jacket 311 and the sieve plates 33 are stacked up and down. Figure 1 and Figure 2 In the state shown, the user first places the original crushed stone that needs to be graded and screened in the storage hopper of the loader 4. The specific structural principle of the loader 4 is the existing technology and will not be elaborated here. After the placement is completed, the user turns on the loader 4 through the control system 5. The conveying device of the loader 4 conveys the original crushed stone stored in the storage hopper to the guide hopper 312. The original stone crushed stone enters the feed barrel 31 through the guide hopper 312. At this time, the stirring motor 314 is automatically turned on, driving the stirring rod 313 to rotate, and the stirring rod 313 drives the stirring blades 3131 to rotate. The stirring blades 3131 can break up and stir the original stone crushed stone conveyed by the loader 4, so that the original stone crushed stone can be evenly distributed on the screen sleeve 311 below the feed barrel 31.

[0054] When the sieve plate 33 and the lower wall of the screen jacket 311 are opposite to each other, the horizontal projection shape of the upper layer of the step-by-step fine screen holes 333 can include the horizontal projection shape of the lower layer of the step-by-step fine screen holes 333, and the horizontal projection shape of the primary screen holes 3111 can include the horizontal projection shape of the uppermost step-by-step fine screen holes 333. During the screening process, the crushed stones will be screened within the size limit of the step-by-step fine screen holes 333 at the lowest layer. At this time, the vibrator 315 is synchronously turned on to vibrate the lower wall of the screen jacket 311 and the sieve plates 33 below, so that the entering The crushed stones inside the barrel 31 vibrate, so that the crushed stones can fully contact with the primary screening holes 3111 and the step-by-step fine screening holes 333, thereby improving the penetration rate of the primary screening holes 3111 and the step-by-step fine screening holes 333. The crushed stones first pass through the screening of the step-by-step fine screening holes 333 with the smallest size, and the screened crushed stones pass through the guide barrel 231 and fall into one of the collecting barrels 21. The weight value detected by the weighing sensor 2231 arranged under the collecting barrel 21 will increase, and the weight value will be reflected to the user in real time through the control system 5.

[0055] When the weight value detected by the weighing sensor 2231 no longer increases, it indicates that the gravel that can pass through the bottom step-by-step fine screening holes 333 in the feed barrel 31 has been basically screened out. At this time, it is necessary to screen the gravel of the next level with a larger particle size. The control system 5 can automatically start the rotating motor 14 according to the signal that the weighing sensor 2231 no longer changes. The rotating motor 14 will drive the rotating disk 22 to rotate clockwise, and the rotating disk 22 will synchronously drive the collecting barrel 21 to rotate clockwise. At the same time, the active wheel 222 will rotate clockwise with the rotating disk 22. 22 drives the driven rotating wheel 342 to rotate clockwise through the synchronous belt 2221, and the driven rotating wheel 342 drives the rotating rod 341 and the incomplete gear 34 to rotate clockwise. The teeth on the incomplete gear 34 are designed to have the function of driving the control gears 32 arranged from bottom to top to rotate in sequence. When the collecting barrel 21 collecting the crushed stones after screening rotates 90 degrees clockwise, another adjacent empty collecting barrel 21 will rotate to the bottom of the feeding barrel 31, and the incomplete gear 34 at the bottom will drive the control gear 32 at the bottom to rotate counterclockwise, so that the bottom layer of the collecting barrel 21 is rotated 90 degrees clockwise. The sieve plate 33 is moved away from the bottom of the sieve sleeve 311, and the sieve plate 33 of the upper layer is now located between the lower collecting barrel 21 and the upper feeding barrel 31. The crushed stones in the feeding barrel 31 continue to be screened out through the step-by-step fine screen holes 333 on the sieve plate 33 under the stirring of the stirring blades 3131 and the vibration of the vibrator 315, and fall into the collecting barrel 21 below for collection. When the crushed stones that can pass through the step-by-step fine screen holes 333 of this layer are basically screened, the above operation is repeated, so that the next collecting barrel 21 rotates clockwise to the bottom of the feeding barrel 31, and the sieve plate 33 is moved from the feeding barrel 31 to the lower part of the collecting barrel 21. The cylinder 31 is moved away from below, and the crushed stone in the feed cylinder 31 is screened into the collecting cylinder 21 through the step-by-step fine screening holes 333 on the uppermost screen plate 33. When the last collecting cylinder 21 rotates to the bottom of the feed cylinder 31, the crushed stone in the feed cylinder 31 is directly screened out of the last level of particle size through the primary screening holes 3111 set on the screen sleeve 311. At this time, the four collecting cylinders 21 respectively collect crushed stone aggregates of four different particle sizes from small to large. The weight of the crushed stone in each collecting cylinder 21 will also be recorded by the control system 5, which is convenient for the subsequent precise control of the graded crushed stone particle size distribution.

[0056] It should be noted that the above clockwise and counterclockwise directions are determined from a perspective of looking down at the device.

[0057] To summarize, the screen sleeve 311 at the lower end of the feed barrel 31 and the screen plates 33 stacked up and down form a four-stage screening structure. The rotation of the incomplete gear 34 can drive the control gear 32 arranged from bottom to top to rotate in sequence, so that the screen plates 33 are moved away from the bottom of the feed barrel 31 in sequence. The original gravel in the feed barrel 31 is screened in sequence through the step-by-step fine screen holes 333 and the primary screen holes 3111 arranged from bottom to top under the stirring of the stirring blades 3131 and the vibration of the vibrator 315, thereby realizing the screening function of gravel with different particle sizes.

[0058] The material dividing assembly 23 is arranged between the collecting barrel 21 and the feeding barrel 31, and plays a transitional role in the gravel screening process. When the rotating disk 22 drives the collecting barrel 21 to rotate, the lower screen plate 33 moves away from the bottom of the feeding barrel 31, and the size of the step-by-step fine screening holes 333 of the upper screen plate 33 is larger, which may cause the gravel in the feeding barrel 31 to fall through the step-by-step fine screening holes 333. However, at this time, the collecting barrel 21 below is not opposite to the feeding barrel 31 up and down, which may cause the gravel to fall out of the collecting barrel 21, causing material loss. The setting of the guide slope 232 can make some of the scattered gravel slide along the guide slope 232 to the collecting barrel 21 at the next position, thereby solving the problem of gravel spilling outside the collecting barrel 21 and ensuring that gravel of various particle sizes can be fully collected in the collecting barrel 21.

[0059] The above is the overall workflow of the present invention, and you can repeat this step next time you use it.

[0060] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0061] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A screening device for highway engineering construction, comprising a base (1), characterized in that: The upper wall of the base (1) is provided with an aggregate assembly (2), a feed screening assembly (3) and a feeder (4); the aggregate assembly (2) is provided at one end of the upper wall of the base (1); the feeder (4) is provided at the other end of the upper wall of the base (1); the feed screening assembly (3) is provided between the aggregate assembly (2) and the feeder (4); a control system (5) is provided on one side of the base (1); a main support frame (11), a first support rod (12) and a second support rod (13) are provided on the upper wall of the base (1); the main support frame (11) is provided on a side of the aggregate assembly (2) close to the feeder (4); the first support rod (12) is provided on a side of the main support frame (11) away from the aggregate assembly (2); the second support rod (13) is provided on a side of the first support rod (12) away from the aggregate assembly (2); a driven rotating wheel (342) is rotatably provided on the upper wall of the base (1); the driven rotating wheel ( The driven rotating wheel (342) is provided on one side of the first supporting rod (12); a rotating rod (341) is fixedly provided at the center of the upper wall of the driven rotating wheel (342); the feed screening assembly (3) comprises a feed cylinder (31), a control gear (32), a screen plate (33), an incomplete gear (34) and a limit ring (35); the feed cylinder (31) is fixedly provided at the upper end of the main supporting frame (11); the control gear (32) is vertically arrayed and coaxially rotatably sleeved on the first supporting rod (12); The sieve plates (33) are respectively fixedly arranged on the side walls of the control gear (32), the incomplete gears (34) are vertically arranged in an array on the side walls of the upper end of the rotating rod (341), the limiting rings (35) are vertically arranged in an array on the upper end of the second supporting rod (13), and the limiting rings (35) are arranged around the feeding barrel (31), the control gear (32), the sieve plates (33) and the incomplete gears (34); The control gear (32), the sieve plate (33), the incomplete gear (34) and the limiting ring (35) are respectively provided in three numbers; the control gear (32) and the sieve plate (33) are provided in one-to-one correspondence; the incomplete gear (34) and the control gear (32) are provided in one-to-one correspondence; the teeth of the incomplete gear (34) mesh with the control gear (32) when the teeth move to the control gear (32); a connecting plate (331) is fixedly connected between the side walls of the sieve plate (33) and the control gear (32); a sliding sleeve (332) is provided on the side wall of the sieve plate (33) away from the control gear (32); the sliding sleeve (332) is sleeved on the limiting ring (35); when the sliding sleeve (332) is located at one end of the limiting ring (35) close to the aggregate assembly (2), the sieve plate (33) is located directly below the feed barrel (31); The upper wall of the sieve plate (33) is evenly provided with step-by-step fine sieve holes (333), the step-by-step fine sieve holes (333) are square, and the sizes of the step-by-step fine sieve holes (333) on the sieve plates (33) arranged from bottom to top are arranged from small to large, and when all the sieve plates (33) are superimposed on each other, the horizontal projection shape of the step-by-step fine sieve holes (333) at the bottom is contained within the horizontal projection shape of the step-by-step fine sieve holes (333) at the top; The material collecting assembly (2) comprises a material collecting barrel (21), a rotating disk (22) and a material distributing assembly (23); the rotating disk (22) is rotatably arranged at one end of the upper wall of the base (1); the material collecting barrels (21) are arranged in an annular array on the upper wall of the rotating disk (22); the number of the material collecting barrels (21) is four; the material distributing assembly (23) is arranged above the material collecting barrel (21); and a third supporting rod (221) is fixedly arranged at the center of the upper wall of the rotating disk (22); A driving rotating wheel (222) is fixedly provided at the center of the lower wall of the rotating disk (22), and the driving rotating wheel (222) is rotatably provided on the upper wall of the base (1). A synchronous belt (2221) is provided around the side walls of the driving rotating wheel (222) and the driven rotating wheel (342). A placement groove (223) is embedded in a circular array on the upper wall of the rotating disk (22). The number of the placement grooves (223) is four. The lower ends of the collecting barrels (21) are respectively engaged in the placement grooves (223). The inner upper walls of the placement grooves (223) are respectively provided with weighing sensors (2231), and the weighing sensors (2231) are in contact with the lower wall of the collecting barrel (21).

2. A screening device for highway engineering construction according to claim 1, characterized in that: The lower end of the feed barrel (31) is threadedly connected to a screen sleeve (311); when the uppermost screen plate (33) is below the feed barrel (31), the upper wall of the uppermost screen plate (33) is movably fitted with the lower wall of the screen sleeve (311); the lower wall of the screen sleeve (311) is evenly provided with primary screening holes (3111); the primary screening holes (3111) are square; when the uppermost screen plate (33) is fitted with the lower wall of the screen sleeve (311), the horizontal projection shape of the uppermost progressive fine screening holes (333) is contained within the horizontal projection shape of the primary screening holes (3111).

3. A screening device for highway engineering construction according to claim 2, characterized in that: The upper end opening of the feed cylinder (31) is connected to a material guide hopper (312), the conveying end of the feeder (4) is arranged above the material guide hopper (312), and a vibrator (315) is provided at the lower end of the inner side wall of the feed cylinder (31), and the vibrator (315) is in contact with the lower wall of the screen jacket (311).

4. A screening device for highway engineering construction according to claim 3, characterized in that: The material distribution assembly (23) comprises a material guide cylinder (231) and a material guide inclined surface (232). The number of the material guide cylinders (231) is four. The material guide cylinders (231) are fixedly arranged in an annular array at the upper end of the third support rod (221). The material guide cylinders (231) are respectively arranged opposite to the material collection cylinder (21) in the upper and lower directions. The material guide inclined surfaces (232) are connected in an annular array between the side walls of adjacent material guide cylinders (231). The surface (232) is arranged to be inclined from high to low in a counterclockwise direction, a material guide opening (2311) is provided at the upper end of the side wall of the material guide cylinder (231), the lowest end of the material guide inclined surface (232) is connected to the lower edge of the material guide opening (2311), and material baffle plates (2321) are respectively provided at the edges of the material guide inclined surface (232), and when the rotating disk (22) rotates, the material guide cylinder (231) is respectively arranged to be opposite to the feed cylinder (31) in the upper and lower directions.

5. A screening device for highway engineering construction according to claim 4, characterized in that: A top support frame (111) is provided on the upper wall of the main support frame (11), the upper wall of the top support frame (111) is arranged above the guide hopper (312), a stirring motor (314) is provided on the upper wall of the top support frame (111), a stirring rod (313) is rotatably provided at the center of the lower wall of the stirring motor (314), an output end of the stirring motor (314) is connected to the upper end of the stirring rod (313), the stirring rod (313) is rotatably provided at the inner center axis position of the feeding barrel (31), and a stirring blade (3131) is provided on the side wall of the stirring rod (313), and the stirring blade (3131) is arranged in a spiral shape.

6. A screening device for highway engineering construction according to claim 5, characterized in that: A secondary support frame (112) is provided at a side of the upper end of the main support frame (11) away from the aggregate assembly (2); the upper end of the first support rod (12) is fixedly connected to the secondary support frame (112); the upper end of the rotating rod (341) is rotatably connected to the secondary support frame (112); a fixing block (113) is provided on a side wall of the main support frame (11) close to the limiting ring (35); the limiting ring (35) is fixedly mounted on the fixing block (113); a rotating motor (14) is provided on the lower wall of the base (1); and an output end of the rotating motor (14) is connected to a rotating shaft of the driving wheel (222).

7. A screening device for highway engineering construction according to claim 6, characterized in that: The rotating motor (14), the weighing sensor (2231), the stirring motor (314), the vibrator (315) and the feeder (4) are electrically connected to the control system (5) via wires.

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