阅读说明：本技术 一种建筑筛沙机 (Building screening sand machine ) 是由 王云娥 于 2020-11-20 设计创作，主要内容包括：本发明公开了一种建筑筛沙机,其结构包括有输送装置、斗架、进料斗、筛沙装置、导弧板、连接架、支撑底架、推沙装置,支撑底架与连接架相连接,连接架上安装有输送装置,与现有技术相比,本发明的有益效果在于：在沙子进入筛沙筒前进入进料斗后能将沙子与沙团块进行筛分,利用沙团块的重力顺高向低的趋势落于松沙装置内进行沙团块碾压松解,再经沙子与底面的滚落碰撞,使得细沙粒与粗沙粒得以完全分开松解,利于后续粗细沙子的筛分,避免粗沙中含有细沙,且利用输送装置滚筒的旋转为动力,间接使得推沙板得以进行往复式平移,以此能间歇性性沙子推开,避免沙子堆得高高的而阻碍到导弧板,使得导弧板得以正常排放粗沙,无须人工操作,省时省力。(The invention discloses a building sand screening machine, which structurally comprises a conveying device, a bucket frame, a feed hopper, a sand screening device, an arc guide plate, a connecting frame, a supporting bottom frame and a sand pushing device, wherein the supporting bottom frame is connected with the connecting frame, and the conveying device is arranged on the connecting frame, compared with the prior art, the building sand screening machine has the beneficial effects that: can sieve sand and sand lump behind the feeder hopper before the sand gets into a sand sieving section of thick bamboo, the gravity that utilizes sand lump falls into in the loose sand device along the trend of height to low and carries out sand lump roll the release, through the roll collision of sand and bottom surface again, make fine sand grain and coarse sand grain can part the release completely, do benefit to the screening of follow-up thickness sand, it has fine sand to avoid containing in the coarse sand, and the rotation that utilizes the conveyor cylinder is power, make indirectly to push away the sand board and can carry out reciprocating type translation, push away with this ability intermittent type nature sand, avoid the sand to pile high and obstruct the arc guiding plate, make the arc guiding plate can normally discharge coarse sand, need not manual operation, time saving and labor saving.)

1. A building sand screening machine structurally comprises a conveying device (1), a bucket frame (2), a feed hopper (3), a sand screening device (4), a guide arc plate (5), a connecting frame (6), a supporting bottom frame (7) and a sand pushing device (8), wherein the supporting bottom frame (7) is connected with the connecting frame (6), the conveying device (1) is installed on the connecting frame (6), the conveying device (1) is located below the sand screening device (4), the sand screening device (4) is connected with the connecting frame (6), the bucket frame (2) is further welded on the connecting frame (6), the feed hopper (3) is arranged on the bucket frame (2), a discharge port of the feed hopper (3) is communicated with the sand screening device (4), the sand screening device (4) is obliquely arranged, and the guide arc plate (5) is arranged at one end, away from the feed hopper (3), of the sand screening device (4), lead arc board (5) and be connected with link (6), the below of leading arc board (5) is equipped with pushes away husky device (8), it is connected its characterized in that with link (6) to push away husky device (8):

the sand pushing device (8) comprises a fixed block (r1), a limiting rod (r2), a disc (r3), a movable rod (r4), an inner rod (r5), a connecting rod (r6), an outer cylinder (r7) and a sand pushing plate (r8), wherein the two ends of one surface, facing the connecting frame (6), of the sand pushing plate (r8) are vertically connected with the outer cylinder (r7), the outer cylinder (r7) is movably matched with the inner rod (r5), the inner rod (r5) is fixedly connected with the outer wall of the connecting frame (6), the outer wall of the outer cylinder (r7) is fixedly provided with the connecting rod (r6), one end, far away from the sand pushing plate (r8), of the connecting rod (r6) is hinged with one end of the movable rod (r4), the other end of the movable rod (r4) is movably connected with the fixed block (1) through the limiting rod (r2), the fixed block (r1) is vertically connected with the disc (r3), and the disc (r3) is connected with the tail end of the arc guide plate (581), the sand pushing plate (r8) is positioned below the arc guiding plate (5).

2. A construction screening machine according to claim 1, wherein: the gag lever post (r2) run through the round hole on movable rod (r4) and be connected with fixed block (r1), gag lever post (r2) adopts clearance fit with the round hole, gag lever post (r2) are "T" type structure setting.

3. A construction screening machine according to claim 1, wherein: push away husky board (r8) including plate body (r80), arc opening (r81), rectangle opening (r82), pivot (r83), axle sleeve (r84), sweep husky brush (r85), removal wheel (r86), arc opening (r81) that the opening is up have been seted up at the top of plate body (r80), and the bottom is equipped with opening rectangle opening (r82) down, rectangle opening (r82) are equipped with pivot (r83), the both ends of pivot (r83) are equipped with removal wheel (r86), two be equipped with axle sleeve (r84) of being connected with pivot (r83) between removal wheel (r86), the equipartition has the husky brush (r85) of sweeping that densely laying on axle sleeve (r84), sweep husky brush (r85) and be the arcwall form, plate body (r80) and urceolus (r7) are connected perpendicularly.

4. A construction screening machine according to claim 3, wherein: the arc-shaped opening (r81) is positioned below the arc guide plate (5) and the vertical distance between the arc guide plate and the arc guide plate is 15 mm.

5. A construction screening machine according to claim 1, wherein: the sand loosening device is characterized in that the feed hopper (3) comprises a hopper body (e1), a sand outlet (e2), a sand loosening device (e3), a lower opening (e4), a coarse filter screen (e5), an upper opening (e6) and a sand inlet (e7), the top of the hopper body (e1) is provided with the sand inlet (e7), the bottom of the hopper body is provided with the sand outlet (e2), the coarse filter screen (e5) fixedly connected with the hopper body (e1) is arranged between the sand outlet (e2) and the sand inlet (e7), the sand loosening device (e3) is installed on one side of the hopper body (e1), the upper end of the sand loosening device (e3) is communicated with the upper opening (e6), the lower end of the sand loosening device (e3) is communicated with the lower opening (e4), and the hopper body (e1) is connected with the hopper frame (2).

6. A construction screening machine according to claim 5, wherein: the coarse filter screen (e5) is obliquely arranged, one end facing the sand loosening device (e3) is a low-level end, and the end far away from the sand loosening device (e3) is a high-level end.

7. A construction screening machine according to claim 5, wherein: the sand loosening device (e3) comprises a forward rotating roller (e31), an outer cover (e32), a reverse rotating roller (e33), a sand channel (e34) and an inner base (e35), wherein the inner base (e35) is connected with the outer cover (e32), a sand channel (e34) is formed between the outer cover (e32) and the inner base (e35), the sand channel (e34) is provided with the forward rotating roller (e31) and the reverse rotating roller (e33), the tail ends of the reverse rotating roller (e33) and the forward rotating roller (e31) penetrate through the outer cover (e32) to be connected with gears, the gears are provided with two gears and meshed with each other, one end of the sand channel (e34) is communicated with an upper opening (e6), the other end of the sand channel is communicated with a lower opening (e4), and one surface, far away from the reverse rotating roller (e33), of the inner base (e35) is fixedly connected with the outer wall surface of a hopper body (1).

Technical Field

The invention relates to the technical field of construction machinery, in particular to a construction sand screening machine.

Background

The sand screening machine is a machine for separating thick and thin materials by utilizing screening equipment, is widely used for separating thick and thin sand and stones in building engineering, because the air contains moisture, sand on the surface of a sand pile can be coagulated into sand lumps due to the moisture, and in the sand screening operation, because the existing sand screening machine is not perfect, the sand screening machine has the following defects to be improved:

(1) for sand agglomerates which are more firm to agglomerate, the sand agglomerates can be screened out as coarse sand grains, and fine sand grains exist in the sand agglomerates, so that the sand screening is not accurate enough and the sand screening is not sufficient;

(2) in the sieve sand, fine sand is generally carried toward the eminence through the conveyer, and the coarse sand utilizes the gravity of sand to fall in low department along the downward gradient of height, because the sand guide plate of low department is nearer from ground, along with piling up of coarse sand, the coarse sand easily surpasss and leads the sand plate to be unfavorable for the row of coarse sand to fall, need the manual work to remove the coarse sand or spread the coarse sand to both sides and expand, comparatively loaded down with trivial details.

Disclosure of Invention

The invention mainly aims to overcome the defects of the prior art and provide a building sand screening machine.

The invention is realized by adopting the following technical scheme: the utility model provides a building screening sand machine, its structure is including conveyor, bucket frame, feeder hopper, screening sand device, lead arc board, link, support chassis, push away husky device, it is connected with the link to support the chassis, install conveyor on the link, conveyor is located the below of screening sand device, screening sand device is connected with the link, the link still welds the bucket frame, be equipped with the feeder hopper on the bucket frame, the discharge gate of feeder hopper communicates with each other with the screening sand device, the screening sand device is the slope setting, the screening sand device is kept away from the one end of feeder hopper and is equipped with and leads the arc board, it is connected with the link to lead the arc board, the below of leading the arc board is equipped with and pushes away husky device, it is connected with the link to push away husky device.

As a further optimization of the content of the invention, the sand pushing device comprises a fixed block, a limiting rod, a disc, a movable rod, an inner rod, a connecting rod, an outer cylinder and a sand pushing plate, wherein two ends of one surface of the sand pushing plate facing to the connecting frame are both vertically connected with the outer cylinder, the outer cylinder is both movably matched with the inner rod, the inner rod is fixedly connected with the outer wall of the connecting frame, the outer side wall of the outer cylinder is fixedly provided with the connecting rod, one end of the connecting rod, far away from the sand pushing plate, is hinged with one end of the movable rod, the other end of the movable rod is movably connected with the fixed block through the limiting rod, the fixed block is vertically connected with the disc, the disc is connected with a tail end roller shaft of the conveying device, close to the arc.

As a further optimization of the invention, the limiting rod penetrates through the round hole on the movable rod and is connected with the fixed block, the limiting rod and the round hole are in clearance fit, and the limiting rod is arranged in a T-shaped structure.

As a further optimization of the content of the invention, the sand pushing plate comprises a plate body, an arc-shaped opening, a rectangular opening, a rotating shaft, a shaft sleeve, a sand sweeping brush and moving wheels, wherein the arc-shaped opening with an upward opening is formed in the top of the plate body, the rectangular opening with a downward opening is formed in the bottom of the plate body, the rotating shaft is arranged in the rectangular opening, the moving wheels are arranged at two ends of the rotating shaft, the shaft sleeve connected with the rotating shaft is arranged between the two moving wheels, the sand sweeping brushes distributed densely are uniformly distributed on the shaft sleeve, the sand sweeping brush is arc-shaped, and the plate body is vertically connected with the outer cylinder.

As a further optimization of the invention, the arc-shaped opening is positioned below the arc guide plate, and the vertical distance between the arc guide plate and the arc guide plate is 15 mm.

As a further optimization of the content of the invention, the feed hopper comprises a hopper body, a sand outlet, a sand loosening device, a lower opening, a coarse strainer, an upper opening and a sand inlet, wherein the top of the hopper body is provided with the sand inlet, the bottom of the hopper body is provided with the sand outlet, the coarse strainer fixedly connected with the hopper body is arranged between the sand outlet and the sand inlet, one side of the hopper body is provided with the sand loosening device, the upper end of the sand loosening device is communicated with the upper opening, the lower end of the sand loosening device is communicated with the lower opening, and the hopper body is connected with a hopper frame.

As a further optimization of the content of the invention, the coarse strainer is arranged obliquely, one end facing the sand loosening device is a low-level end, and the other end far away from the sand loosening device is a high-level end.

As a further optimization of the invention, the sand loosening device comprises a forward rotating roller, an outer cover, a reverse rotating roller, a sand channel and an inner base, wherein the inner base is connected with the outer cover, the sand channel is formed between the outer cover and the inner base, the sand channel is provided with the forward rotating roller and the reverse rotating roller, the tail ends of the reverse rotating roller and the forward rotating roller penetrate through the outer cover to be connected with gears, the gears are provided with two gears which are meshed with each other, one end of the sand channel is communicated with the upper opening, the other end of the sand channel is communicated with the lower opening, and one surface of the inner base, which is far away from the reverse rotating roller, is fixedly connected with the outer wall.

As a further optimization of the content of the invention, the outer cover comprises two limiting top plates, arc surfaces, a bottom plate and side plates, the two side plates are connected through the limiting top plates and the bottom plate, the bottom plate is connected with the limiting top plates and integrally formed with the side plates, the arc surfaces are arranged on the inner side surfaces of the side plates, the distance between the arc surfaces and the outer wall surface of the forward rotation roller is 10mm, and the inner side surfaces of the side plates are connected with the outer side surface of the inner base.

As a further optimization of the content of the invention, the inner base is provided with an inner concave arc groove, the reverse roller is positioned in the inner concave arc groove, the distance between the reverse roller and the inner concave arc groove is 10mm, the inner concave arc groove is right opposite to the arc surface, and the distance between the reverse roller and the reverse roller is 15 mm.

Advantageous effects

Compared with the prior art, the invention provides a building sand screening machine, which has the following beneficial effects:

(1) sand enters the coarse strainer from the sand inlet, most of scattered sand directly passes through the coarse strainer and enters the sand sieving cylinder of the sand sieving device from the sand outlet to sieve the sand, the caked sand blocks enter the sand pushing device from the upper opening along the inclination of the coarse filter screen and fall between the forward rotation roller and the reverse rotation roller, the forward rotation roller and the reverse rotation roller are driven by two meshed gears to rotate in opposite directions, namely, the forward rotation roller rotates clockwise, and the reverse rotation roller rotates anticlockwise, so that the forward rotation roller and the reverse rotation roller grind the sand blocks, the scattered sand grains fall on the bottom panel, the small sand blocks which are not completely loosened become soft through grinding, the sand-loosening device can collide with the bottom panel during rolling, so that sand loosening can be further performed, separation of coarse sand particles and fine sand particles is facilitated, the sand-loosening device slides out of the lower opening along the inclination of the bottom panel and falls into the bucket body, and the sand-loosening device falls into the sand-sieving cylinder through the sand outlet to perform rotary sand sieving;

(2) the sand grains smaller than the aperture of the sand screening cylinder pass through the sand screening cylinder and fall on a conveying belt of a conveying device, the sand grains are conveyed to a high position by the conveying device, the sand grains larger than the aperture of the sand screening cylinder are inclined along the sand screening cylinder, the sand falling on the ground can be pushed away by the sand pushing device, when the roller of the conveying device rotates, the disc can be driven to rotate by taking the rotating shaft of the roller as the shaft, thereby the movable rod can move along with the fixed block through the fixed block and the limiting rod, the movable rod can drive the connecting rod to move, the connecting rod can perform reciprocating translation under the guiding and limiting of the inner rod and the outer cylinder, thereby drive and push away the sand board and carry out reciprocating type translation, push away the sand board and can push away the sand, avoid the sand to pile up and influence the sand and follow the arc board landing for the sand can follow the arc board landing completely.

In summary, compared with the prior art, before sand enters the sand screening cylinder, the sand and sand lumps can be screened after entering the feed hopper, the sand and sand lumps fall into the sand loosening device along the trend of high and low gravity of the sand lumps to be ground and loosened, and then the sand and the bottom surface roll and collide, so that fine sand grains and coarse sand grains can be completely separated and loosened, the subsequent screening of coarse and fine sand is facilitated, the coarse sand is prevented from containing fine sand, the sand pushing plate can be indirectly translated in a reciprocating manner by using the rotation of the roller of the conveying device as power, so that the sand can be pushed away intermittently, the sand is prevented from being piled high and blocking the arc guiding plate, the arc guiding plate can normally discharge the coarse sand, manual operation is not needed, and time and labor are saved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural diagram of a building sand screening machine according to the present invention.

Fig. 2 is a schematic structural diagram of the conveying device of the invention matched with an arc guide plate, a connecting frame and a sand pushing device.

Fig. 3 is a schematic structural view of the sand pushing plate of the present invention.

Fig. 4 is a schematic structural view of the shaft sleeve and the sand sweeping brush of the invention.

Fig. 5 is a schematic sectional view of the hopper of the present invention.

Fig. 6 is a schematic perspective view of the cover of the present invention.

Fig. 7 is a schematic perspective view of the inner base of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

the sand screening device comprises a conveying device 1, a hopper frame 2, a feed hopper 3, a sand screening device 4, an arc guide plate 5, a connecting frame 6, a supporting bottom frame 7, a sand pushing device 8, a fixed block r1, a limiting rod r2, a circular disc r3, a movable rod r4, an inner rod r5, a connecting rod r6, an outer cylinder r7, a sand pushing plate r8, a plate body r80, an arc opening r81, a rectangular opening r82, a rotating shaft r83, a shaft sleeve r84, a sand sweeping brush r85, a moving wheel r86, a hopper body e1, a sand outlet e2, a sand loosening device e3, a lower opening e4, a coarse filter screen e5, an upper opening e6, a sand inlet e7, a side panel roller e31, an outer cover e32, a counter-rotating roller e33, a sand channel e34, an inner base e35, a limiting top plate 32a, an arc surface 32b, a normal rotation plate 32c, a bottom.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-5, the present invention provides a technical solution of a sand screening machine for construction: its structure is including conveyor 1, bucket frame 2, feeder hopper 3, screening sand device 4, leads arc 5, link 6, support chassis 7, pushes away husky device 8, support chassis 7 and link 6 and be connected, install conveyor 1 on the link 6, conveyor 1 is located screening sand device 4's below, screening sand device 4 is connected with link 6, link 6 still welds bucket frame 2, be equipped with feeder hopper 3 on the bucket frame 2, the discharge gate of feeder hopper 3 communicates with each other with screening sand device 4, screening sand device 4 is the slope setting, the one end that feeder hopper 3 was kept away from to screening sand device 4 is equipped with leads arc 5, it is connected with link 6 to lead arc 5, the below of leading arc 5 is equipped with pushes away husky device 8, it is connected with link 6 to push away husky device 8.

The sand pushing device 8 comprises a fixed block r1, a limiting rod r2, a disc r3, a movable rod r4, an inner rod r5, a connecting rod r6, an outer cylinder r7 and a sand pushing plate r8, wherein two ends of one surface, facing the connecting frame 6, of the sand pushing plate r8 are vertically connected with an outer cylinder r7, the outer cylinder r7 is movably matched with the inner rod r5, the inner rod r5 is fixedly connected with the outer wall of the connecting frame 6, the outer side wall of the outer cylinder r7 is fixedly provided with the connecting rod r6, one end, far away from the sand pushing plate r8, of the connecting rod r6 is hinged with one end of the movable rod r4, the other end of the movable rod r4 is movably connected with the fixed block r1 through the limiting rod r2, the fixed block r1 is vertically connected with the disc r3, the disc r3 is connected with a tail end roller shaft, close to the guide arc plate 5, and the sand pushing plate r8 is.

The limiting rod r2 runs through the round hole on the movable rod r4 and is connected with the fixed block r1, the limiting rod r2 and the round hole adopt clearance fit, and the limiting rod r2 is arranged in a T-shaped structure.

The combination of the inner rod r5 and the outer cylinder r7 enables the sand pushing plate r8 to translate, so that the sand pushing plate r8 can better push sand.

The disc r3 is arranged to rotate to drive the stationary fixed block r1 to rotate, so that the movable rod r4 can drive the connecting rod r6 to perform reciprocating translation, and the sand pushing plate r8 can perform reciprocating translation.

The sand pushing plate r8 comprises a plate body r80, an arc-shaped opening r81, a rectangular opening r82, a rotating shaft r83, a shaft sleeve r84, a sand sweeping brush r85 and a moving wheel r86, wherein the top of the plate body r80 is provided with an arc-shaped opening r81 with an upward opening, the bottom of the plate body r80 is provided with a rectangular opening r82 with a downward opening, the rectangular opening r82 is provided with a rotating shaft r83, two ends of the rotating shaft r83 are provided with moving wheels r86, a shaft sleeve r84 connected with the rotating shaft r83 is arranged between the two moving wheels r86, the shaft sleeve r84 is uniformly provided with sand sweeping brushes r85 which are densely distributed, the sand sweeping brushes r85 are arc-shaped, and the plate body 80 is vertically connected with an outer cylinder r 7.

The sand sweeping brush r85 is arranged to sweep away sand, which is beneficial to the centralized accumulation of sand.

The moving wheel r86 is arranged to facilitate the translation of the plate body r80, so that the rigid abrasion of the plate body r80 and the ground is avoided.

The arc-shaped opening r81 can be matched with the arc guide plate 5 in shape, so that the sand pushing plate r8 can move conveniently, sand can be pushed away by the sand pushing plate r8, sand is prevented from being piled high, and sand is prevented from falling onto the arc guide plate 5.

Arc opening r81 is located the below of leading arc 5 and the vertical separation between them is 15mm, does benefit to the translation that pushes away husky board r8, avoids pushing away husky board r8 and receives the restriction that leads arc 5.

Example 2

Referring to fig. 1-7, the present invention provides a technical solution of a sand screening machine for construction: its structure is including conveyor 1, bucket frame 2, feeder hopper 3, screening sand device 4, leads arc 5, link 6, support chassis 7, pushes away husky device 8, support chassis 7 and link 6 and be connected, install conveyor 1 on the link 6, conveyor 1 is located screening sand device 4's below, screening sand device 4 is connected with link 6, link 6 still welds bucket frame 2, be equipped with feeder hopper 3 on the bucket frame 2, the discharge gate of feeder hopper 3 communicates with each other with screening sand device 4, screening sand device 4 is the slope setting, the one end that feeder hopper 3 was kept away from to screening sand device 4 is equipped with leads arc 5, it is connected with link 6 to lead arc 5, the below of leading arc 5 is equipped with pushes away husky device 8, it is connected with link 6 to push away husky device 8.

The sand pushing device 8 comprises a fixed block r1, a limiting rod r2, a disc r3, a movable rod r4, an inner rod r5, a connecting rod r6, an outer cylinder r7 and a sand pushing plate r8, wherein two ends of one surface, facing the connecting frame 6, of the sand pushing plate r8 are vertically connected with an outer cylinder r7, the outer cylinder r7 is movably matched with the inner rod r5, the inner rod r5 is fixedly connected with the outer wall of the connecting frame 6, the outer side wall of the outer cylinder r7 is fixedly provided with the connecting rod r6, one end, far away from the sand pushing plate r8, of the connecting rod r6 is hinged with one end of the movable rod r4, the other end of the movable rod r4 is movably connected with the fixed block r1 through the limiting rod r2, the fixed block r1 is vertically connected with the disc r3, the disc r3 is connected with a tail end roller shaft, close to the guide arc plate 5, and the sand pushing plate r8 is.

The feed hopper 3 comprises a hopper body e1, a sand outlet e2, a sand loosening device e3, a lower opening e4, a coarse filter screen e5, an upper opening e6 and a sand inlet e7, wherein the top of the hopper body e1 is provided with the sand inlet e7, the bottom of the hopper body e1 is provided with the sand outlet e2, a coarse filter screen e5 fixedly connected with the hopper body e1 is arranged between the sand outlet e2 and the sand inlet e7, the sand loosening device e3 is installed on one side of the hopper body e1, the upper end of the sand loosening device e3 is communicated with the upper opening e6, the lower end of the sand loosening device e3 is communicated with the lower opening e4, and the hopper body e1 is connected with the hopper frame 2.

The sand loosening device e3 is arranged to loosen sand blocks and facilitate screening of the sand blocks.

The coarse filter screen e5 is obliquely arranged, one end facing the sand loosening device e3 is a low-level end, and the other end far away from the sand loosening device e3 is a high-level end.

The coarse strainer e5 can be arranged to drop sand grains, the coarse strainer e5 can block sand blocks, and the sand blocks can roll down in the sand loosening device e3 by the inclined arrangement.

The sand loosening device e3 comprises a forward rotating roller e31, an outer cover e32, a reverse rotating roller e33, a sand passage e34 and an inner base e35, the inner base e35 is connected with an outer cover e32, the sand passage e34 is formed between the outer cover e32 and the inner base e35, the sand passage e34 is provided with a forward rotating roller e31 and a reverse rotating roller e33, the tail ends of the reverse rotating roller e33 and the forward rotating roller e31 penetrate through the outer cover e32 to be connected with gears, the gears are provided with two gears which are meshed with each other, one end of the sand passage e34 is communicated with an upper opening e6, the other end of the sand passage e34 is communicated with a lower opening e4, and one surface, far away from the reverse rotating roller e33, of the inner base e35 is fixedly connected with the outer wall surface of.

The combination of the forward roller e31 and the reverse roller e33 enables the forward roller e31 and the reverse roller e33 to rotate oppositely, so that the sand block can be rolled, and the sand block can be loosened.

The outer cover e32 comprises two limiting top plates 32a, an arc surface 32b, a bottom plate 32c and side plates 32d, the two side plates 32d are connected through the limiting top plates 32a and the bottom plate 32c, the bottom plate 32c is connected with the limiting top plate 32a and integrally formed with the side plates 32d, the arc surface 32b is arranged on the inner side surface of the side plates 32d, the distance between the arc surface 32b and the outer wall surface of the forward rotation roller e31 is 10mm, and the inner side surface of the side plate 32d is connected with the outer side surface of the inner base e 35.

The inner base e35 is provided with an inner concave arc groove 35a, the reverse roller e33 is located in the inner concave arc groove 35a, the distance between the inner concave arc groove 35a and the arc surface 32b is 10mm, the inner concave arc groove 35a is opposite to the arc surface 32b, and the distance between the reverse roller e33 and the reverse roller e33 is 15 mm.

The structural arrangement of the outer cover e32 and the inner base e35 can enable the caked sand blocks to fall between the forward roller e31 and the reverse roller e 33.

The working principle of the invention is as follows: sand enters the coarse strainer e5 from the sand inlet e7 and falls on the coarse strainer e5, most of the scattered sand directly passes through the coarse strainer e5 and enters the sand sieving cylinder of the sand sieving device 4 from the sand outlet e2 for sand sieving, the caked sand block enters the sand pushing device 8 from the upper opening e6 along the inclination of the coarse strainer e5 and falls between the forward rotating roller e31 and the reverse rotating roller e33, the forward rotating roller e31 and the reverse rotating roller e33 rotate in opposite directions under the drive of two meshed gears, namely the forward rotating roller e31 rotates clockwise, and the reverse rotating roller e33 rotates counterclockwise, so that the forward rotating roller e31 and the reverse rotating roller e33 roll the sand block, the scattered sand particles fall on the bottom plate 32c, small sand blocks which are not completely loosened are loosened through rolling, collide with the bottom plate during rolling, further sand loosening can be carried out, the separation of the coarse sand particles and the fine sand particles slide in the hopper outlet 1 along the bottom plate 4 c, the sand falls into a sand sieving cylinder through a sand outlet e2 to be rotationally sieved, sand grains smaller than the aperture of the sand sieving cylinder pass through the sand sieving cylinder to fall on a conveying belt of a conveying device 1 and are conveyed to a high position through the conveying device 1, the sand grains larger than the aperture of the sand sieving cylinder are conveyed to a low position along the inclination of the sand sieving cylinder under the rotation action of the sand sieving cylinder to a guide arc plate 5 and then fall on the ground through the guide arc plate 5, and the sand falling on the ground can be pushed away through a sand pushing device 8;

conveyor 1's cylinder is when rotatory, can drive disc r3 and use the pivot of cylinder to carry out the rotation as the axle, thereby through fixed block r1, gag lever post r2 makes movable rod r4 can follow fixed block r1 displacement, thereby movable rod r4 can drive connecting rod r6 displacement, and connecting rod r6 carries out reciprocating type translation under inner rod r5 and urceolus r 7's direction is spacing, thereby it carries out reciprocating type translation to drive sand pushing plate r8, sand pushing plate r8 can push away the sand, avoid the sand to pile up and influence the sand from leading arc board 5 landing, make the sand can be completely from leading arc board 5 landing.

In summary, the technical progress obtained by the invention compared with the prior art is as follows: before sand gets into a sieve husky section of thick bamboo, can sieve sand and sand lump after getting into the feeder hopper, the gravity that utilizes sand lump falls on in the loose husky device along the trend of height to low and carries out the husky lump and roll the debonding, collision through the roll of sand and bottom surface again, make fine sand grain and coarse sand grain can part the debonding completely, do benefit to the screening of follow-up thickness sand, it has fine sand to avoid containing in the coarse sand, and the rotation that utilizes the conveyor cylinder is power, it can reciprocating type translation to make indirectly to push away the sand board, push away with this ability intermittent type nature sand, avoid the sand to pile up the height and obstruct and lead the arc board, make it can normally discharge coarse sand to lead the arc board, need not manual operation, time saving and labor saving.

In the description of the present invention, it is to be understood that the terms "center", "one side", "the other side", "one end", "the other end", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.