Natural pebble grading and screening device for mud-bound pebble base course

Abstract

The present invention discloses a natural pebble grading and screening device for a mud-bound pebble base course, which includes: a lower support; a drum screening mechanism erected above the lower support, with a feed inlet provided on one side of the drum screening mechanism; a circulating drainage assembly arranged below the drum screening mechanism and fixed to the lower support, and the circulating drainage assembly can provide the water source countercurrent power during the screening of natural pebbles; a mounting frame body fixed on the circulating drainage assembly, with a hopper arranged on the mounting frame body, a transfer pipe connected below the hopper, and one end of the transfer pipe extending into the drum screening mechanism through the feed inlet; sorting and temporary storage boxes arranged in a row below the interior of the circulating drainage assembly; and a pick-up and delivery port corresponding to and communicating with each of the sorting and temporary storage boxes.

Description

Technical Field

[0001] The present invention belongs to the technical field of road construction equipment, and particularly relates to a natural pebble grading and screening device for a mud-bound pebble subbase. Background Art

[0002] Currently, during the construction of a mud-bound macadam base course, the main aggregate of the mud-bound macadam base course is coarse gravel, which has a strong interlocking effect. The internal pores need to be filled with mud-bound macadam to effectively improve the stability and density of the base course. Before the gravel is paved, the staff still needs to check the overall quality and internal performance of the gravel. Generally speaking, the stones in the mud-bound macadam base course need to be natural gravel or rolled gravel, and their application grades should conform to the construction specifications. The internal slender and flat particles should not exceed 20% of the total. In the prior art, for the natural pebble grading and screening device, due to the large hardness and weight of the pebbles, when they fall, they will impact the sieve mesh, and the long-term impact will cause wear, fatigue and even damage to the sieve mesh.

[0003] Therefore, the technical personnel in this field have provided a natural pebble grading and screening device for a mud-bound pebble subbase to solve the problems raised in the above background art. Summary of the Invention

[0004] To achieve the above object, the present invention provides the following technical solution: A natural pebble grading and screening device for a mud-bound pebble subbase, which includes:

[0005] A lower support;

[0006] A drum screening mechanism, erected above the lower support, and a feed inlet is arranged on one side of the drum screening mechanism;

[0007] A circulating drainage assembly, arranged below the drum screening mechanism and fixed to the lower support, and the circulating drainage assembly can provide the water source countercurrent power during the natural pebble screening;

[0008] A mounting frame body, fixed on the circulating drainage assembly, a hopper is arranged on the mounting body, a transfer pipe is connected below the hopper, and one end of the transfer pipe extends into the drum screening mechanism through the feed inlet;

[0009] Sorting and temporary storage boxes, arranged in a row below the interior of the circulating drainage assembly; and

[0010] Taking and sending ports, corresponding to and communicating with each sorting and temporary storage box.

[0011] Further, preferably, the drum screening mechanism includes:

[0012] An adjusting frame, rotatably arranged in the circulating drainage assembly;

[0013] A hydraulic telescopic rod is connected to the circulating drainage assembly, and the telescopic end of the hydraulic telescopic rod is rotatably connected to the adjusting frame;

[0014] A central shaft is rotatably arranged on the adjusting frame. One end of the adjusting frame is provided with a reduction gearbox, and the output end of the reduction gearbox is fixed to the central shaft;

[0015] An outer drum is coaxially sleeved and fixed on the central shaft; and

[0016] An inner buffer net assembly covers the inner wall of the outer drum.

[0017] Further, preferably, the outer drum is always in a state of being lower on the left and higher on the right during the rotation adjustment of the adjusting frame, and a plurality of screening holes distributed on the outer drum gradually increase in aperture size from left to right.

[0018] Further, preferably, the inner buffer net assembly includes:

[0019] Two connecting ring frames are arranged left and right, and the connecting ring frames are embedded and fixed in the outer drum;

[0020] An inner net body is connected between the connecting ring frames;

[0021] An outer net body is arranged inside the inner net body, and its end is connected to the connecting ring frame;

[0022] A plurality of micro-cylinders are evenly distributed, and each micro-cylinder is vertically fixed on the inner wall of the outer drum. A piston is slidably arranged in the micro-cylinder;

[0023] An elastic telescopic rod has one end fixed to the piston, and the other end of the elastic telescopic rod passes through the inner net body and is connected to the outer net body.

[0024] Further, preferably, a plurality of hinge shaft frames are circumferentially distributed on the connecting ring frame. The hinge shaft frames are rotatably connected to the connecting ring frame, and the cross-section of the hinge shaft frame is in a < - shaped structure. The two ends of the hinge shaft frame are respectively connected to the inner net body and the outer net body, and the inner net body and the outer net body are provided with mesh holes of the same size as the screening holes on the outer drum.

[0025] Further, preferably, the circulating drainage assembly includes:

[0026] A water tank;

[0027] A drain pipe is vertically connected to one side of the lower end face of the water tank, and a water inlet pipe is provided on the other side of the water tank where the drain pipe is located;

[0028] A circulating pump is connected to the drain pipe;

[0029] The sand filtering device is arranged on the liquid discharge pipe in front of the working side of the circulation pump.

[0030] Furthermore, as a preference, flowing water is stored in the water tank, and the flowing water can submerge one-third of the whole drum screening mechanism.

[0031] Furthermore, as a preference, floating cotton is also arranged in the flowing water.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] In the present invention, the mainly arranged drum screening mechanism can be used for the rolling screening of natural pebbles. Among them, the drum screening mechanism is inclined and installed on the circulating drainage assembly. On the one hand, the circulating drainage assembly can use flowing water to wash the surface of natural pebbles, improving the screening accuracy. On the other hand, the flowing water can also buffer the impact of natural pebbles in the falling and impact state during screening, thereby reducing the impact damage to the outer drum. In particular, the arranged inner buffer net assembly can form secondary impact energy dissipation inside the outer drum, further improving the service life of the outer drum. Description of the Drawings

[0034] Figure 1 is the structural schematic diagram of the present invention;

[0035] Figure 2 is the structural schematic diagram of the drum screening mechanism in the present invention;

[0036] Figure 3 is the structural schematic diagram of the inner buffer net assembly in the present invention;

[0037] Figure 4 is the structural schematic diagram of the micro cylinder in the present invention;

[0038] Figure 5 is the structural schematic diagram of the circulating drainage assembly in the present invention;

[0039] In the figure: 1. Lower support; 11. Feeding and discharging port; 12. Mounting frame body; 13. Hopper; 2. Circulating drainage assembly; 21. Water tank; 22. Water inlet pipe; 23. Liquid discharge pipe; 24. Circulation pump; 25. Sand filtering device; 3. Drum screening mechanism; 31. Adjusting frame; 32. Hydraulic telescopic rod; 33. Central shaft; 34. Reduction gearbox; 35. Outer drum; 4. Inner buffer net assembly; 41. Connecting ring frame; 42. Inner net body; 43. Outer net body; 44. Micro cylinder; 45. Hinge shaft frame. Detailed Embodiments

[0040] Please refer to Figure 1 , in the embodiment of the present invention, the natural pebble grading and screening device for the mud-bound pebble base course includes:

[0041] Lower support 1;

[0042] The drum screening mechanism 3 is erected above the lower support 1, and a feed inlet is provided on one side of the drum screening mechanism 3;

[0043] The circulating drainage assembly 2 is arranged below the drum screening mechanism 3 and fixed to the lower support 1. The circulating drainage assembly 2 can provide the reverse flow power of water source during the screening of natural pebbles;

[0044] The mounting frame body 12 is fixed on the circulating drainage assembly 2. A hopper 13 is arranged on the mounting body 12. A transfer pipe 14 is connected below the hopper 13. One end of the transfer pipe 14 extends into the drum screening mechanism 3 through the feed inlet;

[0045] The sorting and temporary storage boxes 15 are arranged in a row below the interior of the circulating drainage assembly 2; and

[0046] The picking and sending ports 11 are correspondingly communicated with the sorting and temporary storage boxes 15. Among them, the natural pebbles after being screened by the rolling of the drum screening mechanism can correspondingly accumulate and fall into the sorting and temporary storage boxes. When the natural pebbles in the sorting and temporary storage boxes reach the load limit, the natural pebbles are taken out through the picking and sending ports. Among them, the flowing water in the circulating drainage assembly can effectively prevent the natural pebbles from impacting and falling.

[0047] In this embodiment, the drum screening mechanism 3 includes:

[0048] The adjusting frame 31 is rotatably arranged in the circulating drainage assembly 2;

[0049] The hydraulic telescopic rod 32 is connected to the circulating drainage assembly 2, and the telescopic end of the hydraulic telescopic rod 32 is rotatably connected to the adjusting frame 31;

[0050] The central shaft 33 is rotatably arranged on the adjusting frame 31. A reduction gearbox 34 is installed at one end of the adjusting frame 31, and the output end of the reduction gearbox 34 is fixed to the central shaft 33;

[0051] The outer drum 35 is coaxially sleeved and fixed on the central shaft 33; and

[0052] The inner buffer mesh assembly 4 is sleeved on the inner wall of the outer drum 35. That is to say, the outer drum can roll and screen the natural pebbles under the rotational drive of the reduction gearbox.

[0053] As a preferred embodiment, the outer drum 35 is always in a state of being lower on the left and higher on the right during the rotation and adjustment of the adjusting frame 31, and the multiple screening holes distributed on the outer drum 35 gradually become larger from left to right according to the aperture size.

[0054] In this embodiment, the inner buffer mesh assembly 4 includes:

[0055] There are two connecting ring frames 41 arranged left and right, and the connecting ring frames 41 are embedded and fixed in the outer drum 35;

[0056] The inner net body 42 is connected between the connecting ring frames 41;

[0057] The outer net body 43 is arranged inside the inner net body 42, and its end is connected to the connecting ring frame 41;

[0058] There are multiple uniformly distributed micro-cylinders 44, and each micro-cylinder 44 is vertically fixed on the inner wall of the outer drum 35. A piston is slidably arranged in the micro-cylinder 44;

[0059] The elastic telescopic rod has one end fixed to the piston, and the other end of the elastic telescopic rod passes through the inner net body 42 and is connected to the outer net body 43. Among them, the inner net body and the outer net body can form a double impact buffering effect, elastically protecting the inner wall of the outer drum 35 and improving the service life of the outer drum.

[0060] In this embodiment, a plurality of hinge shaft frames 45 are circumferentially distributed on the connecting ring frame 41. The hinge shaft frames 45 are rotatably connected to the connecting ring frame 41, and the cross-section of the hinge shaft frame 45 is in a < shape structure. The two ends of the hinge shaft frame 45 are respectively connected to the inner net body 42 and the outer net body 43. The inner net body 42 and the outer net body 43 are provided with mesh holes of the same size as the screening holes on the outer drum 35. Among them, the micro-cylinders can be supplied with air for pressurization or exhausted according to the overall weight of the natural pebbles, the rolling screening speed of the outer drum, the erection angle of the outer drum, etc., so that the elastic telescopic rod can slide correspondingly. When the elastic telescopic rod is relatively extended, the outer net body is in a taut state while the inner net body is relatively relaxed, so as to adjust the relative tension between the inner net body and the outer net body; when the elastic telescopic rod is relatively retracted, the outer net body is tightened in the reverse direction and the inner net body is synchronously tightened under the pulling action of the hinge shaft frame, thereby forming a double-layer rigid erection net.

[0061] In this embodiment, the circulating drainage assembly 2 includes:

[0062] A water tank 21;

[0063] A drain pipe 23 is vertically connected to one side of the lower end surface of the water tank 21, and a water inlet pipe 22 is provided on the other side of the water tank 21 where the drain pipe 23 is located;

[0064] A circulating pump 24 is connected to the drain pipe 23;

[0065] The sand filtering device 25 is arranged on the drainage pipe 23 in front of the working position of the circulation pump 24. That is to say, the circulation pump pumps the flowing water in the water tank through the drainage pipe to the water inlet pipe to form a circulating flow. Among them, the flowing direction of the flowing water is opposite to the rolling screening direction of the drum screening mechanism, so as to form a reverse flow, so that the natural pebbles can undergo multiple rolling screening operations.

[0066] As a preferred embodiment, the water tank 21 stores flowing water, and the flowing water can immerse one-third of the entire drum screening mechanism 3. In particular, it is assumed that the distance from the highest point at the left end of the outer drum to the liquid level of the flowing water is D1, and the distance from the highest point at the right end of the outer drum to the liquid level of the flowing water is D2, where D1 ≤ 40 cm and D2 ≤ 70 cm, so as to form a buffer liquid level for the natural pebble blanking by the flowing water.

[0067] In this embodiment, floating cotton is also arranged in the flowing water to further improve the page buffering effect.

[0068] Specifically, the natural pebbles are conveyed to the drum screening mechanism through a hopper. The outer drum can perform rolling screening under the action of rotation. Among them, the erection angle of the outer drum can be adjusted by the telescopic action of the hydraulic telescopic rod, so as to change the impact direction of the natural pebble rolling screening and reduce the impact strength on the outer drum. The circulating drainage component is also arranged to form a reverse flow (opposite to the rolling screening direction of the drum screening mechanism) in the water tank through the circulation pump, realizing the full screening of natural pebbles, with high working efficiency.

[0069] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. Natural pebble grading and screening device for mud-bound pebble base course, Characterized in that: Comprising: Lower support (1); Roller screening mechanism (3), erected above the lower support (1), and a feed inlet is provided on one side of the roller screening mechanism (3); Circulating drainage assembly (2), arranged below the roller screening mechanism (3) and fixed to the lower support (1), and the circulating drainage assembly (2) can provide reverse water flow power during the screening of natural pebbles; Mounting frame body (12), fixed on the circulating drainage assembly (2), a hopper (13) is arranged on the mounting frame body (12), a transfer pipe (14) is connected below the hopper (13), and one end of the transfer pipe (14) extends into the roller screening mechanism (3) through the feed inlet; Sorting and temporary storage box (15), arranged in a row below the interior of the circulating drainage assembly (2); Pick-up and delivery port (11), corresponding to and communicating with each sorting and temporary storage box (15); The roller screening mechanism (3) includes: Adjusting frame (31), rotatably arranged in the circulating drainage assembly (2); Central shaft (33), rotatably arranged on the adjusting frame (31); Outer drum (35), coaxially sleeved and fixed on the central shaft (33); Inner buffer net assembly (4), covering and connecting to the inner wall of the outer drum (35); The inner buffer net assembly (4) includes: Connecting ring frames (41), two arranged left and right, and the connecting ring frames (41) are embedded and fixed in the outer drum (35); Inner net body (42), connected between the connecting ring frames (41); Outer net body (43), arranged inside the inner net body (42), and its end is connected to the connecting ring frame (41); Micro cylinders (44), a plurality of which are evenly distributed, each micro cylinder (44) is vertically fixed on the inner wall of the outer drum (35), and a piston is slidably arranged in the micro cylinder (44); Elastic telescopic rod, one end of which is fixed to the piston, and the other end passes through the inner net body (42) and is connected to the outer net body (43); A plurality of hinge shaft frames (45) are circumferentially distributed on the connecting ring frame (41), the hinge shaft frames (45) are rotatably connected to the connecting ring frame (41), the cross section of the hinge shaft frame (45) is in a < - shaped structure, the two ends of the hinge shaft frame (45) are respectively connected to the inner net body (42) and the outer net body (43), and the inner net body (42) and the outer net body (43) are provided with mesh holes of the same size as the screening holes on the outer drum (35).

2. The natural pebble grading and screening device for mud-bound pebble base course according to claim 1, Characterized in that: The roller screening mechanism (3) further includes: Hydraulic telescopic rod (32), connected to the circulating drainage assembly (2), and the telescopic end of the hydraulic telescopic rod (32) is rotatably connected to the adjusting frame (31); One end of the adjusting frame (31) is equipped with a reduction gearbox (34), and the output end of the reduction gearbox (34) is fixed to the central shaft (33).

3. The natural pebble grading and screening device for mud-bound pebble base course according to claim 2, Characterized in that: The outer drum (35) is always in a state of being lower on the left and higher on the right during the rotation and adjustment of the adjusting frame (31), and the plurality of screening holes distributed on the outer drum (35) gradually become smaller from left to right according to the aperture size.

4. The natural pebble grading and screening device for the gravel subbase according to claim 1, characterized in that: The circulating drainage assembly (2) includes: A water tank (21); A drain pipe (23), vertically connected to one side of the lower end face of the water tank (21), and a water inlet pipe (22) is provided on the other side of the water tank (21) where the drain pipe (23) is located; A circulating pump (24), connected to the drain pipe (23); A sand filtering device (25), arranged on the drain pipe (23) on the front side of the operation of the circulating pump (24).

5. The natural pebble grading and screening device for the gravel subbase according to claim 4, characterized in that: Flowing water is stored in the water tank (21), and the flowing water can submerge one-third of the whole drum screening mechanism (3).

6. The natural pebble grading and screening device for the gravel subbase according to claim 5, characterized in that: Floating cotton is also arranged in the flowing water.

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