阅读说明：本技术 一种道路施工用人行道路面铺设装置 (Pavement paving device for pedestrian roads for road construction ) 是由 骆用玲 于 2020-05-16 设计创作，主要内容包括：本发明属于道路施工技术领域,尤其是一种道路施工用人行道路面铺设装置,针对现有技术中存在不便于对砂石进行粉碎和筛分,导致铺设的砂石尺寸不一,影响人行道铺设质量的问题,现提出如下方案,其包括机体,机体的底部设置有两个导轮和碾压轮,所述机体的顶部固定连接有砂石存放箱,砂石存放箱的一侧连通有上料结构,机体上设置有空腔,空腔的两侧内壁上分别滑动安装有第一筛选盒和第二筛选盒,第一筛选盒和第二筛选盒为对称设置,第一筛选盒的出料口上活动连接有第一导料盒。本发明结构简单,操作方便,便于对砂石进行粉碎和筛分,可以保证铺设的砂石尺寸的均匀性,提高人行道铺设质量。(The invention belongs to the technical field of road construction, and particularly relates to a sidewalk pavement paving device for road construction, which aims at solving the problems that in the prior art, gravels are inconvenient to crush and screen, so that the size of the paved gravels is different, and the pavement paving quality is influenced. The invention has simple structure and convenient operation, is convenient for crushing and screening the sandstone, can ensure the uniformity of the size of the paved sandstone, and improves the pavement paving quality.)

1. The pavement paving device for the sidewalks for road construction comprises a machine body (1), wherein two guide wheels (3) and a rolling wheel (2) are arranged at the bottom of the machine body (1), and is characterized in that a sand storage box (4) is fixedly connected to the top of the machine body (1), one side of the sand storage box (4) is communicated with a feeding structure, a cavity (25) is arranged on the machine body (1), a first screening box (19) and a second screening box (21) are respectively and slidably mounted on the inner walls of two sides of the cavity (25), the first screening box (19) and the second screening box (21) are symmetrically arranged, a first material guide box (20) is movably connected to a discharge port of the first screening box (19), a second material guide box (22) is movably connected to a discharge port of the second screening box (21), a material returning structure is embedded in the machine body (1), and the first material guide box (20) is communicated with the material returning structure, the discharge gate of second guide box (22) extends to the bottom of organism (1), the top of organism (1) is provided with crushing barrel (5), feed structure and feed back structure all are linked together with the top of crushing barrel (5), vertical axis (7) are installed to the perpendicular rotation in crushing barrel (5), the outside fixed mounting of vertical axis (7) has a plurality of crushing sword (16), a plurality of crushing sword (16) all are located crushing barrel (5), the top of organism (1) is provided with actuating mechanism, vertical axis (7) and actuating mechanism looks adaptation, the outside fixed cover of vertical axis (7) is equipped with two sloping piece (31), two sloping piece (31) are contradicted with the bottom of first screening box (19) and second screening box (21) respectively, first screening box (19) and second screening box (21) all with vertical axis (7) swing joint, feed structure and feed back structure all with vertical axis (7) looks adaptation.

2. The pavement paving device for the pavement construction according to claim 1, wherein the feeding structure comprises a feeding barrel (14), a feeding shaft (12), a feeding spiral blade (13) and a feeding hole (15), the feeding barrel (14) is fixedly connected with the top of the machine body (1), the feeding barrel (14) is communicated with the sand storage box (4), the feeding shaft (12) is rotatably connected with the feeding barrel (14), the feeding spiral blade (13) is fixedly arranged on the outer side of the feeding shaft (12), and the feeding hole (15) is arranged between the feeding barrel (14) and the crushing barrel (5).

3. The pavement paving device for the pavement construction according to claim 1, wherein the material returning structure comprises a material returning barrel (34), a material returning shaft (32) and a material returning spiral blade (33), the material returning barrel (34) is embedded in the machine body (1), the first material guiding box (20) is communicated with the material returning barrel (34), the material returning shaft (32) is rotatably connected with the material returning barrel (34), and the material returning spiral blade (33) is fixedly arranged on the outer side of the material returning shaft (32).

4. A pavement paving device for roads for road construction according to claim 3, characterized in that the top of the said feed back shaft (32) and the vertical shaft (7) are fixedly mounted with first chain wheels (17), and the two first chain wheels (17) are engaged with the same chain (18).

5. The pavement paving device for the pavement construction according to claim 1, wherein a first bevel gear (8) is fixedly mounted on an output shaft of the servo motor (6), a second bevel gear (9) is fixedly mounted on the outer side of the vertical shaft (7), the first bevel gear (8) is meshed with the second bevel gear (9), a first reduction gear (10) is fixedly mounted on the outer side of the vertical shaft (7), a second reduction gear (11) is fixedly mounted at one end of the feeding shaft (12), and the first reduction gear (10) is meshed with the second reduction gear (11).

6. The pavement paving device for the pavement for road construction according to claim 1, wherein two sliding grooves (29) are formed in the inner walls of the two sides of the cavity (25), sliding blocks (27) are fixedly mounted on the sides, away from each other, of the first screening box (19) and the second screening box (21), the sliding blocks (27) are slidably connected with the corresponding sliding grooves (29), and the same spring (28) is fixedly mounted between the top of each sliding block (27) and the inner wall of the top of each sliding groove (29).

7. The pavement paving device for the pavement construction according to claim 1, wherein a first inclined guide plate (23) and a second inclined guide plate (24) are fixedly installed on the inner wall of one side of the cavity (25) in an inclined manner, the inclined end of the first inclined guide plate (23) is positioned at the top of the second screening box (21), the inner wall of the bottom of the cavity (25) is movably connected with a fine powder collecting box (26), and the inclined end of the second inclined guide plate (24) is positioned at the top of the fine powder collecting box (26).

8. The pavement paving device for the sidewalks for road construction according to claim 1, wherein a drawer hole is formed in one side inner wall of the cavity (25), the fine powder collecting box (26) is movably connected with the drawer hole, two guide strips (30) are fixedly mounted on the bottom inner wall of the cavity (25), two guide grooves are formed in the bottom of the fine powder collecting box (26), and the two guide strips (30) are respectively connected with the two guide grooves in a sliding manner.

Technical Field

The invention relates to the technical field of road construction, in particular to a pavement paving device for a sidewalk for road construction.

Background

Roads are divided into highways, urban roads, rural roads, school roads and the like according to the use characteristics of the roads, sidewalks refer to parts which are separated by kerbs or guardrails and other similar facilities and are specially used for pedestrians to pass through, and the sidewalks are specially used for roads for people to walk, so that illegal occupation is forbidden, and vehicles are also forbidden to drive in.

When the construction is carried out on the pedestrian road, a layer of gravel needs to be paved on the surface of the pedestrian road, other engineering materials are poured on the surface of the pedestrian road, and in the life, common paving equipment is not convenient to pave the gravel, so that the gravel is not convenient to crush and screen, the size of the paved gravel is different, and the pavement paving quality is influenced.

Disclosure of Invention

The invention aims to solve the problems that in the prior art, the paved gravels are different in size and the pavement paving quality is affected due to the fact that the gravels are not convenient to crush and screen, and provides a pavement paving device for pavement construction.

In order to achieve the purpose, the invention adopts the following technical scheme:

a pavement paving device for sidewalks for road construction comprises a machine body, wherein two guide wheels and a rolling wheel are arranged at the bottom of the machine body, a gravel storage box is fixedly connected to the top of the machine body, a feeding structure is communicated with one side of the gravel storage box, a cavity is formed in the machine body, a first screening box and a second screening box are respectively and slidably mounted on the inner walls of two sides of the cavity, the first screening box and the second screening box are symmetrically arranged, a first material guide box is movably connected to a discharge port of the first screening box, a second material guide box is movably connected to a discharge port of the second screening box, a material return structure is embedded in the machine body, the first material guide box is communicated with the material return structure, the discharge port of the second material guide box extends to the bottom of the machine body, a crushing barrel is arranged at the top of the machine body, the feeding structure and the material return structure are both communicated with the top of the crushing barrel, and a vertical shaft is vertically and rotatably mounted in the crushing barrel, the outside fixed mounting of vertical axis has a plurality of crushing sword, and a plurality of crushing sword all are located crushing barrel, and the top of organism is provided with actuating mechanism, vertical axis and actuating mechanism looks adaptation, and the fixed cover in the outside of vertical axis is equipped with two hypotenuse pieces, and two hypotenuse pieces are contradicted with the bottom of first screening box and second screening box respectively, and first screening box and second screening box all with vertical axis swing joint, material loading structure and feed back structure all with vertical axis looks adaptation.

Preferably, the feeding structure comprises a feeding barrel, a feeding shaft, a feeding spiral blade and a feeding hole, the feeding barrel is fixedly connected with the top of the organism, the feeding barrel is communicated with the sand storage box, the feeding shaft is rotatably connected with the feeding barrel, the feeding spiral blade is fixedly installed on the outer side of the feeding shaft, and the feeding hole is formed between the feeding barrel and the crushing barrel.

Preferably, the feed back structure includes feed back section of thick bamboo, feed back axle and feed back spiral leaf, and the feed back section of thick bamboo is embedded in the organism, and first guide box is linked together with the feed back section of thick bamboo, and the feed back axle rotates with the feed back section of thick bamboo to be connected, and feed back spiral leaf fixed mounting is in the outside of feed back axle.

Preferably, the top of the material returning shaft and the top of the vertical shaft are both fixedly provided with first chain wheels, and the two first chain wheels are both meshed with the same chain.

Preferably, a first bevel gear is fixedly mounted on an output shaft of the servo motor, a second bevel gear is fixedly mounted on the outer side of the vertical shaft, the first bevel gear is meshed with the second bevel gear, a first reduction gear is fixedly mounted on the outer side of the vertical shaft, a second reduction gear is fixedly mounted at one end of the feeding shaft, and the first reduction gear is meshed with the second reduction gear.

Preferably, two chutes are formed in the inner walls of the two sides of the cavity, a sliding block is fixedly mounted on one side, away from each other, of the first screening box and the second screening box, the sliding block is connected with the corresponding chute in a sliding mode, and a same spring is fixedly mounted between the top of the sliding block and the inner wall of the top of the chute.

Preferably, the inclined fixed mounting has first slope baffle and second slope baffle on the inner wall of one side of cavity, and the slope end of first slope baffle is located the top of second screening box, and swing joint has the fine powder to collect the box on the bottom inner wall of cavity, and the slope end of second slope baffle is located the top of fine powder collection box.

Preferably, a drawer hole is formed in the inner wall of one side of the cavity, the fine powder collecting box is movably connected with the drawer hole, two guide strips are fixedly mounted on the inner wall of the bottom of the cavity, two guide grooves are formed in the bottom of the fine powder collecting box, and the two guide strips are respectively in sliding connection with the two guide grooves.

Compared with the prior art, the invention has the advantages that:

(1) according to the scheme, the sand and stone can be uninterruptedly guided into the crushing barrel through the feeding structure, and the vertical shaft drives the crushing cutter to crush the sand and stone;

(2) the large gravel particles are guided into a first material guide box by the first screening box and are guided into a material return cylinder by the first material guide box, a vertical shaft drives a material return shaft to rotate through two first chain wheels and a chain, the material return shaft drives a material return spiral blade to rotate, and the material return spiral blade guides the large gravel into a crushing cylinder again to be crushed continuously;

(3) screening again through a second screening box, guiding the screened standard gravel into the ground through a second material guide box for laying, ensuring the laying uniformity, and collecting the fine gravel falling from the bottom of the second screening box in a fine powder collecting box;

(4) the vertical axis drives two hypotenuse blocks and rotates, and two hypotenuse blocks extrude first screening box and second screening box upward movement respectively, provide decurrent elasticity for the slider through the spring for first screening box and second screening box vibrations from top to bottom making a round trip, can improve the screening effect of first screening box and second screening box, extrude the grit through rolling wheel pair.

The invention has simple structure and convenient operation, is convenient for crushing and screening the sandstone, can ensure the uniformity of the size of the paved sandstone, and improves the pavement paving quality.

Drawings

FIG. 1 is a schematic structural view of a pavement laying device for a sidewalk for road construction according to the present invention;

FIG. 2 is a schematic structural view of part A of a pavement laying apparatus for a pavement construction according to the present invention;

FIG. 3 is a schematic structural view of part B of the pavement laying apparatus for a pavement construction according to the present invention;

FIG. 4 is a schematic perspective view of a first screening box and a slide block of the pavement paving device for pavement construction according to the present invention;

fig. 5 is a schematic perspective view of a bevel block and a vertical shaft of the pavement laying apparatus for a pavement for road construction according to the present invention.

In the figure: 1 machine body, 2 rolling wheels, 3 guide wheels, 4 sand storage boxes, 5 crushing cylinders, 6 servo motors, 7 vertical shafts, 8 first bevel gears, 9 second bevel gears, 10 first reduction gears, 11 second reduction gears, 12 feeding shafts, 13 feeding spiral blades, 14 feeding cylinders, 15 feeding ports, 16 crushing knives, 17 chain wheels, 18 chains, 19 first screening boxes, 20 first guide boxes, 21 second screening boxes, 22 second guide boxes, 23 first inclined guide plates, 24 second inclined guide plates, 25 cavities, 26 fine powder collecting boxes, 27 sliding blocks, 28 springs, 29 sliding grooves, 30 guide strips, 31 inclined edge blocks, 32 returning shafts, 33 returning spiral blades and 34 returning cylinders.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example one

Referring to fig. 1-5, a pavement paving device for roads for road construction comprises a machine body 1, two guide wheels 3 and a rolling wheel 2 are arranged at the bottom of the machine body 1, a sand storage box 4 is fixedly connected to the top of the machine body 1, a feeding structure is communicated with one side of the sand storage box 4, a cavity 25 is arranged on the machine body 1, a first screening box 19 and a second screening box 21 are respectively slidably mounted on the inner walls of the two sides of the cavity 25, the first screening box 19 and the second screening box 21 are symmetrically arranged, a first material guide box 20 is movably connected to the discharge port of the first screening box 19, a second material guide box 22 is movably connected to the discharge port of the second screening box 21, a return structure is embedded in the machine body 1, the first material guide box 20 is communicated with the return structure, the discharge port of the second material guide box 22 extends to the bottom of the machine body 1, a crushing barrel 5 is arranged at the top of the machine body 1, and the feeding structure and the return structure are both communicated with the top of the crushing barrel 5, vertical axis 7 is installed in the vertical rotation in the crushing section of thick bamboo 5, the outside fixed mounting of vertical axis 7 has a plurality of crushing sword 16, a plurality of crushing sword 16 all are located crushing section of thick bamboo 5, vertical axis 7 drives a plurality of crushing sword 16 and rotates, crushing sword 16 smashes the grit, the top of organism 1 is provided with actuating mechanism, vertical axis 7 and actuating mechanism looks adaptation, the fixed cover in outside of vertical axis 7 is equipped with two sloping blocks 31, two sloping blocks 31 are inconsistent with the bottom of first screening box 19 and second screening box 21 respectively, first screening box 19 and second screening box 21 all with vertical axis 7 swing joint, material loading structure and feed back structure all with vertical axis 7 looks adaptation.

In this embodiment, the feeding structure includes feeding barrel 14, feeding shaft 12, feeding spiral leaf 13 and feed inlet 15, feeding barrel 14 fixed connection organism 1's top, feeding barrel 14 is linked together with grit and deposits case 4, feeding shaft 12 rotates with feeding barrel 14 and is connected, feeding spiral leaf 13 fixed mounting is in the outside of feeding shaft 12, feed inlet 15 sets up between feeding barrel 14 and crushing barrel 5, feeding shaft 12 drives feeding spiral leaf 13 and rotates, feeding spiral leaf 13 deposits the inside grit of case 4 with the grit and introduces into feeding barrel 14.

In this embodiment, the feed back structure includes feed back cylinder 34, feed back axle 32 and feed back helical blade 33, and feed back cylinder 34 is embedded in organism 1, and first guide box 20 is linked together with feed back cylinder 34, and feed back axle 32 rotates with feed back cylinder 34 to be connected, and feed back helical blade 33 fixed mounting is in the outside of feed back axle 32, and feed back axle 32 drives feed back helical blade 33 and rotates, and feed back helical blade 33 continues to smash in redirecting into crushing barrel 5 with great grit again.

In this embodiment, the top of the material returning shaft 32 and the top of the vertical shaft 7 are both fixedly provided with the first chain wheels 17, the two first chain wheels 17 are both engaged with the same chain 18, and the vertical shaft 7 drives the material returning shaft 32 to rotate through the two first chain wheels 17 and the chain 18.

In this embodiment, a first bevel gear 8 is fixedly mounted on an output shaft of the servo motor 6, a second bevel gear 9 is fixedly mounted on the outer side of the vertical shaft 7, the first bevel gear 8 is engaged with the second bevel gear 9, a first reduction gear 10 is fixedly mounted on the outer side of the vertical shaft 7, a second reduction gear 11 is fixedly mounted at one end of the feeding shaft 12, the first reduction gear 10 is engaged with the second reduction gear 11, the servo motor 6 drives the vertical shaft 7 to rotate through the first bevel gear 8 and the second bevel gear 9, and the vertical shaft 7 drives the feeding shaft 12 to rotate through the first reduction gear 10 and the second reduction gear 11.

In this embodiment, two chutes 29 have been all seted up on the both sides inner wall of cavity 25, and the equal fixed mounting in one side that first screening box 19 and second screening box 21 kept away from each other has slider 27, slider 27 and the spout 29 sliding connection that corresponds, and fixed mounting has same spring 28 between the top of slider 27 and the top inner wall of spout 29, and spring 28 provides decurrent elasticity for slider 27.

In this embodiment, the slope fixed mounting has first slope baffle 23 and second slope baffle 24 on the inner wall of one side of cavity 25, the slope end of first slope baffle 23 is located the top of second screening box 21, swing joint has fine powder collection box 26 on the bottom inner wall of cavity 25, the slope end of second slope baffle 24 is located the top of fine powder collection box 26, first slope baffle 23 can be with the leading-in second screening box 21 of grit of first screening in, second slope baffle 23 can be with the leading-in fine powder collection box 26 of grit of second screening in.

In this embodiment, the drawer hole has been seted up on one side inner wall of cavity 25, and box 26 and drawer hole swing joint are collected to the fine powder, and fixed mounting has two guide bars 30 on the bottom inner wall of cavity 25, and two guide slots have been seted up to the bottom of box 26 is collected to the fine powder, and two guide bars 30 respectively with two guide slot sliding connection, the clearance can be taken out to the box 26 is collected to the fine powder.

Example two

Referring to fig. 1-5, a pavement paving device for roads for road construction, comprising a machine body 1, two guide wheels 3 and a rolling wheel 2 arranged at the bottom of the machine body 1, a sand storage box 4 fixedly connected to the top of the machine body 1 through screws, a feeding structure communicated with one side of the sand storage box 4, a cavity 25 arranged on the machine body 1, a first screening box 19 and a second screening box 21 respectively slidably mounted on the inner walls of the two sides of the cavity 25, the first screening box 19 and the second screening box 21 symmetrically arranged, a first material guide box 20 movably connected to the discharge port of the first screening box 19, a second material guide box 22 movably connected to the discharge port of the second screening box 21, a material return structure embedded in the machine body 1, the first material guide box 20 communicated with the material return structure, the discharge port of the second material guide box 22 extending to the bottom of the machine body 1, a crushing barrel 5 arranged at the top of the machine body 1, feeding structure and feed back structure all are linked together with the top of a crushing barrel 5, vertical axis 7 is installed to the perpendicular rotation in the crushing barrel 5, a plurality of crushing sword 16 are installed through welded fastening in the outside of vertical axis 7, a plurality of crushing sword 16 all are located crushing barrel 5, vertical axis 7 drives a plurality of crushing sword 16 rotations, crushing sword 16 smashes the grit, the top of organism 1 is provided with actuating mechanism, vertical axis 7 and actuating mechanism looks adaptation, the fixed cover in outside of vertical axis 7 is equipped with two sloping blocks 31, two sloping blocks 31 are inconsistent with the bottom of first screening box 19 and second screening box 21 respectively, first screening box 19 and second screening box 21 all with vertical axis 7 swing joint, feeding structure and feed back structure all with vertical axis 7 looks adaptation.

In this embodiment, the material loading structure includes material loading barrel 14, material loading axle 12, material loading spiral leaf 13 and feed inlet 15, material loading barrel 14 passes through the top of screw fixed connection organism 1, material loading barrel 14 is linked together with grit storage box 4, material loading axle 12 rotates with material loading barrel 14 to be connected, material loading spiral leaf 13 passes through welded fastening and installs in the outside of material loading axle 12, feed inlet 15 sets up between material loading barrel 14 and crushing barrel 5, material loading axle 12 drives material loading spiral leaf 13 and rotates, material loading spiral leaf 13 is deposited the inside grit of box 4 with the grit and is introduced into material loading barrel 14.

In this embodiment, the feed back structure includes feed back cylinder 34, feed back axle 32 and feed back helical blade 33, and feed back cylinder 34 is embedded in organism 1, and first guide box 20 is linked together with feed back cylinder 34, and feed back axle 32 rotates with feed back cylinder 34 to be connected, and feed back helical blade 33 passes through welded fastening and installs in the outside of feed back axle 32, and feed back axle 32 drives feed back helical blade 33 and rotates, and feed back helical blade 33 continues to smash in redirecting into crushing barrel 5 with great grit again.

In this embodiment, the top of the material returning shaft 32 and the top of the vertical shaft 7 are both fixedly provided with the first chain wheels 17 through welding, the two first chain wheels 17 are all meshed with the same chain 18, and the vertical shaft 7 drives the material returning shaft 32 to rotate through the two first chain wheels 17 and the chain 18.

In this embodiment, a first bevel gear 8 is fixedly installed on an output shaft of the servo motor 6 by welding, a second bevel gear 9 is fixedly installed on the outer side of the vertical shaft 7 by welding, the first bevel gear 8 is engaged with the second bevel gear 9, a first reduction gear 10 is fixedly installed on the outer side of the vertical shaft 7 by welding, a second reduction gear 11 is fixedly installed at one end of the feeding shaft 12 by welding, the first reduction gear 10 is engaged with the second reduction gear 11, the servo motor 6 drives the vertical shaft 7 to rotate by the first bevel gear 8 and the second bevel gear 9, and the vertical shaft 7 drives the feeding shaft 12 to rotate by the first reduction gear 10 and the second reduction gear 11.

In this embodiment, two chutes 29 have all been seted up on the both sides inner wall of cavity 25, and the slider 27 is all installed through welded fastening in the one side that first screening box 19 and second screening box 21 kept away from each other, slider 27 and the spout 29 sliding connection that corresponds, has same spring 28 through welded fastening between the top of slider 27 and the top inner wall of spout 29, and spring 28 provides decurrent elasticity for slider 27.

In this embodiment, there are first slope baffle 23 and second slope baffle 24 on the slope of one side inner wall of cavity 25 through welded fastening, the slope end of first slope baffle 23 is located the top of second screening box 21, swing joint has fine powder collection box 26 on the bottom inner wall of cavity 25, the slope end of second slope baffle 24 is located the top of fine powder collection box 26, first slope baffle 23 can be with the leading-in second screening box 21 of grit of first screening in, second slope baffle 23 can be with the leading-in fine powder collection box 26 of grit of second screening in.

In this embodiment, the drawer hole has been seted up on one side inner wall of cavity 25, and box 26 and drawer hole swing joint are collected to the fine powder, installs two gibs 30 through welded fastening on the bottom inner wall of cavity 25, and two guide slots have been seted up to the bottom of box 26 is collected to the fine powder, and two gibs 30 respectively with two guide slot sliding connection, the clearance can be taken out to the box 26 is collected to the fine powder.

In the embodiment, when the device is used, the servo motor 6 is powered on and the controller, sand and stone are added into the sand and stone storage box 4, the machine body 1 is powered on and the driving device drives the machine body 1 to move, the servo motor 6 is started, the servo motor 6 drives the vertical shaft 7 to rotate through the first bevel gear 8 and the second bevel gear 9, the vertical shaft 7 drives the feeding shaft 12 to rotate through the first reduction gear 10 and the second reduction gear 11, the feeding shaft 12 drives the feeding spiral blades 13 to rotate, the sand and stone inside the sand and stone storage box 4 are guided into the feeding barrel 14 through the feeding spiral blades 13 and are guided into the crushing barrel 5 through the feeding port 15, the vertical shaft 7 drives the plurality of crushing cutters 16 to rotate, the crushing cutters 16 crush the sand and crushed sand and stone into the cavity 25, the sand and stone enter the first screening box 19, the first screening box 19 guides larger sand and stone particles into the first material guide box 20, the first material guide box 20 is guided into the material return barrel 34, the vertical shaft 7 drives the material return shaft 32 to rotate through the two first chain wheels 17 and the chain 18, the material return shaft 32 drives the material return spiral blade 33 to rotate, the material return spiral blade 33 guides larger gravels into the crushing barrel 5 again to be crushed continuously, gravels falling from the first screening box 19 are screened again through the second screening box 21, screened standard gravels are guided into the ground through the second material guide box 22 to be laid, fine gravels falling from the bottom of the second screening box 21 fall into the fine powder collecting box 26 to be collected, the vertical shaft 7 drives the two inclined edge blocks 31 to rotate, the two inclined edge blocks 31 respectively extrude the first screening box 19 and the second screening box 21 to move upwards, a downward elastic force is provided for the sliding block 27 through the spring 28, so that the first screening box 19 and the second screening box 21 vibrate up and down, the screening effect of the first screening box 19 and the second screening box 21 can be improved, the fine powder collection box 26 can be taken out and collected by pressing the sand by the rolling wheel 2.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.