CN108296161B

CN108296161B - Multistage automatic sand screening machine for building

Info

Publication number: CN108296161B
Application number: CN201810040313.8A
Authority: CN
Inventors: 张茂刚; 史娜
Original assignee: Wuxi City College of Vocational Technology
Current assignee: Wuxi City College of Vocational Technology
Priority date: 2018-01-16
Filing date: 2018-01-16
Publication date: 2021-03-26
Anticipated expiration: 2038-01-16
Also published as: CN108296161A

Abstract

The invention discloses a multistage automatic sand screening machine for buildings, which aims to provide a multistage automatic sand screening machine for buildings, which has the advantages of small floor area, capability of automatically screening sand and stone in multistage and high production efficiency, and has the technical scheme that a sand inlet is rotatably connected with a sand shoveling arm for shoveling sand into the sand, a one-stage sand screening unit comprising a coarse sand screen and a vibration base and a two-stage sand screening unit comprising an obliquely arranged sand channel, a medium sand screen and a fine sand bin which are arranged in the sand channel in a surrounding manner are sequentially arranged in a sand screening cylinder from top to bottom, the bottom of the sand screening cylinder is provided with a conveyor belt, the sand screening machine can divide the sand into coarse sand, medium sand and fine sand, can screen the fine sand, can automatically finish feeding and discharging, does not need manual addition and transportation of the sand, and improves the production efficiency; meanwhile, the sand screening machine structure is sequentially arranged from top to bottom, and the vertical sand screening machine is compact in structure and can reduce the occupied area.

Description

Multistage automatic sand screening machine for building

Technical Field

The invention relates to the field of building equipment, in particular to a multistage automatic sand screening machine for buildings.

Background

In the modern building field, concrete is an indispensable building material. The concrete is generally referred to as cement as a cementing material, and sand and stone as aggregate; the cement concrete, also called as common concrete, is obtained by mixing with water (which may contain additives and admixtures) according to a certain proportion and stirring, and is widely applied to civil engineering.

Thus, sand is also an indispensable building material. In addition to concrete formed by mixing with cement, sand can also be used for construction of foundations, concrete roads and the like, and is widely used. The fineness modulus is generally used as an index for the fineness and type of the sand particle size, and the larger the fineness modulus is, the coarser the sand is.

The fineness modulus is 3.7-3.1, and the sand with the average grain diameter of more than 0.5mm is coarse sand; the fineness modulus is 3.0-2.3, and the sand with the average grain diameter of 0.5-0.35 mm is medium sand; the fineness modulus is 2.2-1.6, the sand with the average grain diameter of 0.35-0.25 mm is fine sand, and each sand has different application ranges. The gravel of the naturally mined gravel has different diameters and thicknesses and can be manually distinguished to adapt to the use environment, so people develop the sand screening machine.

The sand screening machine is also called dry land sand screening boat, sand-stone separator, and is divided into drum type sand screening machine, water-washing drum type sand screening machine and vibration screen type sand screening machine, etc. said invented sand screening machine is formed from boat body, frame, speed reducer, conveying belt, rotary screen and engine or motor, and can be used for sand-stone separation of river channel, reservoir and coal yard.

At present, a chinese patent with publication number CN103599841A discloses an improved double-barrel counter-flow type sand washer, which comprises a frame, a large sand washing barrel, a small sand washing barrel, a sand screening barrel, an overflow tank, a water supply system, and a power system, wherein the lower part of the frame is provided with a first discharge port, a second discharge port, a third discharge port, a fourth discharge port, and a fifth discharge port corresponding to the discharge end of the sand screening barrel, sand salvaging blades are arranged in the large sand washing barrel and the small sand washing barrel, hook plates are arranged on the inner edges of the partition plates of the large sand washing barrel and the small sand washing barrel, the hook plates are connected with the small ends of the sand salvaging blades in the large sand washing barrel, spokes are arranged in the small sand washing barrel, and the spokes are connected with the small ends of the sand salvaging blades in the small sand washing barrel.

Compared with manual sand screening, the improved double-barrel counter-flow sand washer has the advantages that the yield is improved, the labor intensity is reduced, the production cost is saved, the occupied area is larger when the improved double-barrel counter-flow sand washer is used, and the sand screening efficiency is lower.

Chinese patent publication No. CN106391469A discloses a vertical sand sieving device for civil engineering, which comprises a fixed cylinder and a rotary cylinder, wherein the rotary cylinder is fixedly connected with the fixed cylinder in a rotating manner, the rotary cylinder is connected with a motor in a transmission manner, a main shaft is arranged at the center of the rotary cylinder, a blanking slot is arranged at an opening at the lower end of the rotary cylinder, a plurality of fixed columns are fixedly connected to the upper end of the main shaft, the upper end of each fixed column is fixedly connected with an upper cover, a first screen frame and a second screen frame which are sequentially arranged from top to bottom are arranged below the upper cover, a conical screen mesh is fixed on the first screen frame and the second screen frame to form a second screening area and a third screening area, a conical deflector is arranged between the second screening area of the first screening area, and an adjusting rod is arranged between the deflector and the upper cover.

Although this kind of live and build engineering with vertical screening sand device of separation has reduced area, and the structure is comparatively compact, it can only divide into two kinds of particle sizes with the grit, and the screening is careful not enough, and needs artifical material loading, and production efficiency is not high.

Disclosure of Invention

The invention aims to provide a multistage automatic sand screening machine for buildings, which has the advantages of small floor area, capability of automatically screening sand and stones in multistage and high production efficiency.

The technical purpose of the invention is realized by the following technical scheme:

a multistage automatic sand screening machine for building comprises a sand screening cylinder, a sand inlet and a sand outlet, wherein the sand inlet and the sand outlet are formed in the sand screening cylinder, a sand shoveling arm used for shoveling sand is connected to the sand inlet in a rotating mode, and the sand screening cylinder is internally provided with a sand shoveling arm from top to bottom in sequence

The primary sand screening unit comprises a coarse sand screen and a vibration base and is used for screening coarse sand and discharging the coarse sand out of the sand screening cylinder;

the secondary sand screening unit comprises a sand channel which is obliquely arranged and a medium sand screen which is arranged in the sand channel in a surrounding manner and is used for screening medium sand and fine sand and discharging the medium sand out of the sand screening cylinder;

the fine sand bin is arranged at the bottom of the sand screening cylinder and used for temporarily storing fine sand after screening, and the bottom of the fine sand bin is provided with a conveyor belt and used for conveying the fine sand out of the sand outlet.

By adopting the technical scheme, when the gravel is required to be screened, the gravel is sent into the sand screening barrel from the sand inlet by the sand shoveling arm, coarse sand in the gravel is screened by the primary sand screening unit, and the coarse sand is discharged out of the sand screening barrel; remaining gravel gets into second grade sand sieving unit, and through locating the middlings screen cloth in the sand way with the screening of middlings and fine sand, the middlings is along the sand way discharge sand sieving barrel, and the fine sand drops in the fine sand feed bin of sand sieving barrel bottom to transport outside sand sieving barrel through the conveyer belt.

The sand screening machine can divide gravel into coarse sand, medium sand and fine sand, is fine in screening, can automatically complete feeding and discharging, does not need manual addition and transportation of the gravel, and improves production efficiency; meanwhile, the sand screening machine structure is sequentially arranged from top to bottom, and the vertical sand screening machine is compact in structure and can reduce the occupied area.

Further setting: vibration base all is equipped with the vibrating part including being the base bottom plate that "says" font sets up on the centre of base bottom plate and the four corners, and the vibrating part is equipped with the loop bar including rotating the eccentric bull stick of connection on the base bottom plate, and eccentric bull stick bottom cover is equipped with the loop bar, and the grit screen cloth is connected on the loop bar.

Through adopting above-mentioned technical scheme, because the grit screen cloth is connected on the loop bar, when operating personnel drive eccentric bull stick was rotatory, can drive loop bar and the synchronous eccentric rotation of grit screen cloth, reach the effect of vibrations, with the grit separation of different particle sizes, the less grit of particle size can be followed the opening part of vibration base and transported to next unit after the grit screen cloth separation.

Further setting: a driving wheel is fixed on an eccentric rotating rod in the middle of the vibration base, a vibration motor is fixed on the vibration base, and the driving wheel is driven to rotate through a synchronous belt.

Through adopting above-mentioned technical scheme, vibrating motor passes through drive wheel and hold-in range and drives the eccentric bull stick rotation to make the cover establish the loop bar eccentric rotation on the eccentric bull stick, form vibrations, accomplish screening and the filtration of coarse sand.

Further setting: the eccentric rotating rod comprises a middle disc, a first eccentric rod and a second eccentric rod are eccentrically fixed on two side faces of the middle disc, and the first eccentric rod and the second eccentric rod are arranged in a staggered mode.

Through adopting above-mentioned technical scheme, the setting of middle disc can make eccentric bull stick rotate to be connected on vibration base, and vibrating motor drives the second eccentric rod rotation of below, makes first eccentric rod drive loop bar and makes eccentric rotation to accomplish the holistic vibration of screening sand machine and screening.

Further setting: the sand way includes a plurality of branch ways, wholly is the rhombus setting and communicates with the base bottom plate, and the bottom that the sand was said is equipped with the screening platform, and the branch way sets up towards the screening platform.

Through adopting above-mentioned technical scheme, in well sand and the fine sand after screening through one-level sand screening unit got into the subchannel, because sand says whole and be the setting of rhombus, the gravel gets into different subchannels, gathers on the screening platform at last. Because the middlings screen cloth is located in the sand way, consequently the gravel bumps to the middlings screen cloth at the circulation in-process that the bypath, just can accomplish the screening of fine sand and middlings, and the screening platform can further screen it at last, avoids screening incompletely.

Further setting: the both sides of screening platform are equipped with the intercommunication and have the middlings material that is used for discharging the middlings to say, and the sand is said, and screening platform and middlings material say all the cladding outward and have the middlings screen cloth.

Through adopting above-mentioned technical scheme, the sand is said and is had the medium sand screen cloth with screening platform is last all the cladding, and the sand is said wholly and is the rhombus, and the gravel can be constantly collided with the medium sand screen cloth in the sand is said, and collision in-process fine sand drops to depositing in the fine sand feed bin of bottom through the screen cloth, and the medium sand is said along with the sand and is got into screening platform, under the promotion at the rear gravel, the place ahead gravel gets into the medium sand material and says and discharge to the external world.

Further setting: the fine sand bin is positioned below the screening platform and the medium sand channel, and the sand outlet is respectively positioned on the side wall of the sand screening cylinder corresponding to the coarse sand screen, the medium sand channel and the fine sand bin.

Through adopting above-mentioned technical scheme, from the sand say, the fine sand that drops on saying and screening platform says gets into the fine sand feed bin in, drop to the conveyer belt of bottom on, the rethread conveyer belt is to the external discharge of sand screening section of thick bamboo, therefore the sand outlet corresponds grit difference coarse sand screen cloth, the sand in says and the setting of fine sand feed bin can make things convenient for the grit differentiation of various particle diameters to transport and deposit.

Further setting: a cleaning arm used for sweeping coarse sand into the sand outlet is horizontally arranged in a sand sieving cylinder above the coarse sand screen, and a cleaning hydraulic cylinder is arranged in the sand sieving cylinder and used for driving the cleaning arm to slide.

Through adopting above-mentioned technical scheme, after the screening of a period of time, clean the pneumatic cylinder and drive and clean the arm and slide, make the grit sweep out to sand outlet one side, accomplish the emission of grit, so can make things convenient for operating personnel to clear up the grit screen cloth, avoid the grit screen cloth to block up.

Further setting: shovel sand arm including rotate connect in a sieve sand section of thick bamboo and the main armed lever of cavity setting, feed sleeve and the shovel sand board of sliding connection in the feed sleeve of intercommunication main armed lever, be equipped with in the feed sleeve and drive actuating cylinder for it slides to drive the shovel sand board.

Through adopting above-mentioned technical scheme, when adding the grit, shovel sand arm whole downward sloping drives actuating cylinder and drives shovel sand board roll-off, inserts the grit, just can empty the grit from the feed inlet to a sieve sand section of thick bamboo in through the passageway between shovel sand board, feeding cover and the main arm pole to accomplish automatic feed work.

Further setting: a driving motor is arranged in the sand screening cylinder, a rotating shaft is rotatably connected to the main arm rod, a driving worm wheel is fixed on the rotating shaft, a driving worm is fixed on an output shaft of the driving motor, and the driving worm is meshed with the driving worm wheel.

Through adopting above-mentioned technical scheme, driving motor's output shaft drives the drive worm rotatory to it is rotatory to take the drive worm wheel, just can make the shovel sand arm location in optional position with worm gear's auto-lock nature.

In conclusion, the invention has the following beneficial effects:

the gravel can be divided into coarse sand, medium sand and fine sand, the screening is fine, the feeding and the discharging can be automatically completed, the gravel does not need to be added and carried manually, and the production efficiency is improved; meanwhile, the sand screening machine structure is sequentially arranged from top to bottom, and the vertical sand screening machine is compact in structure and can reduce the occupied area.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of example 1;

FIG. 2 is a schematic view showing the construction of a sand shoveling arm in example 1;

FIG. 3 is a schematic view for showing a vibration base in embodiment 1;

fig. 4 is a schematic view for showing an eccentric rotary rod in embodiment 1.

In the figure, 1, a sand screening cylinder; 11. a sand inlet; 12. a sand outlet; 2. a sand shoveling arm; 21. a main arm lever; 22. a feeding sleeve; 23. shoveling a sand plate; 24. a driving cylinder; 25. a drive motor; 26. a rotating shaft; 27. a drive worm gear; 28. a drive worm; 29. a partition plate; 3. a primary sand screening unit; 31. a coarse sand screen; 32. vibrating the base; 321. a base bottom plate; 4. a secondary sand screening unit; 41. a sand channel; 411. a branch road; 412. screening the platform; 42. a medium sand screen; 43. a medium sand channel; 5. a fine sand silo; 6. a conveyor belt; 7. a vibrating member; 71. an eccentric rotating rod; 711. a middle disc; 712. a first eccentric rod; 713. a second eccentric rod; 72. a loop bar; 73. a driving wheel; 74. a vibration motor; 75. a synchronous belt; 8. a sweeping arm; 81. and cleaning the hydraulic cylinder.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings.

The technical scheme adopted by the invention is as follows:

embodiment 1, a multistage automatic sand screening machine for building, including a cylindrical sand screening section of thick bamboo 1 as shown in fig. 1, sand inlet 11 has been seted up to the right side top of sand screening section of thick bamboo 1, and articulated on the sand screening section of thick bamboo 1 lateral wall on the sand inlet 11 position have shovel sand arm 2 for shovel the grit into in the sand inlet 11. The sand shoveling arm 2 comprises three parts, one part is a main arm rod 21, and one end of the main arm rod 21 is rotatably connected to the side wall of the sand sieving cylinder 1; the second is a feeding sleeve 22, the feeding sleeve 22 is fixed on the main arm rod 21; and the third step is a sand shoveling plate 23, wherein the sand shoveling plate 23 is integrally arranged in an inclined manner and is connected in the feeding sleeve 22 in a sliding manner.

As shown in fig. 1 and 2, the sanding shovel arm 2 is hollow as a whole, and an opening in the feeding cover 22 communicates the sanding shovel arm 2 with the main arm lever 21. Be equipped with between main arm pole 21 and the sand screen section of thick bamboo 1 and be used for driving the rotatory pivot 26 of main arm pole 21, be fixed with drive worm wheel 27 with the axle center on the pivot 26, be equipped with drive worm 28 in the sand screen section of thick bamboo 1, still be equipped with driving motor 25 in the sand screen section of thick bamboo 1, driving motor 25 drives drive worm 28 and drive worm wheel 27 rotatory to change the inclination between shovel sand arm 2 and the sand screen section of thick bamboo 1, with the feeding process of one-tenth grit.

As shown in FIG. 2, a plurality of driving cylinders 24 are horizontally arranged in the feeding sleeve 22, an output shaft of the driving cylinders 24 is connected with one side of the shoveling plate 23, and the driving cylinders 24 can push the shoveling plate 23 to slide in the feeding sleeve 22. Drive the baffle 29 that actuating cylinder 24 top was equipped with the level setting, can prevent that the grit from getting into and drive between the actuating cylinder 24 to make things convenient for shovel sand board 23 to shovel the grit.

As shown in fig. 1, a first-level sand screening unit 3, a second-level sand screening unit 4 and a fine sand bin 5 are sequentially arranged in a sand screening cylinder 1 from top to bottom, the bottom of the sand screening cylinder 1 is provided with the fine sand bin 5, a conveyor belt 6 is arranged in the fine sand bin 5, a sand outlet 12 is arranged at the rear position of the bottom of the sand screening cylinder 1, and the conveyor belt 6 moves towards the sand outlet 12. The fine sand falls onto the conveyor belt 6 in the fine sand bin 5, and is conveyed out of the sand screening cylinder 1 through the conveyor belt 6.

As shown in fig. 1 and 3, the primary sand sieving unit 3 includes a vibration base 32 horizontally disposed at an upper position in the sand sieving cylinder 1, the vibration base 32 includes a base bottom plate 321, the base bottom plate 321 is integrally disposed in a shape like a Chinese character 'ri', four corners and middle positions of the base bottom plate 321 are provided with a vibrating member 7, as shown in fig. 4, the vibrating member 7 includes an eccentric rotating rod 71, the eccentric rotating rod 71 includes a middle disc 711 disposed at the middle position, the top of the middle disc 711 is fixed with a first eccentric rod 712, the bottom of the middle disc 711 is fixed with a second eccentric rod 713, and the first eccentric rod 712 and the second eccentric rod 713 are eccentrically disposed in a staggered manner.

As shown in fig. 1 and 3, the middle disk 711 is rotatably coupled to the vibration base 32, and the first eccentric rod 712 and the second eccentric rod 713 respectively penetrate through the vibration base 32 and extend out of the upper and lower surfaces of the vibration base 32. The second eccentric rod 713 is sleeved with a sleeve rod 72, a plurality of sleeve rods 72 are connected with coarse sand screens 31, and the coarse sand screens 31 are integrally and horizontally arranged. The sand outlet 12 is arranged on the position of the sand sieving cylinder 1 corresponding to the coarse sand screen 31, and the filtered coarse sand can be discharged.

As shown in fig. 1 and 3, a vibration motor 74 is fixed at a middle position of the bottom surface of the vibration base 32, transmission wheels 73 are respectively arranged on an output wheel of the vibration motor 74 and the first eccentric rod 712, and the two transmission wheels 73 are linked through a timing belt 75. A cleaning hydraulic cylinder 81 is provided on the side wall of the sand screen 1 above the coarse sand screen 31, a cleaning arm 8 provided perpendicular to the cleaning hydraulic cylinder 81 is fixed to an output shaft of the cleaning hydraulic cylinder 81, and the cleaning arm 8 can slide toward the sand outlet 12.

As shown in fig. 1, the secondary sand screening unit includes a sand channel 41 disposed obliquely, the sand channel 41 includes a plurality of branch channels 411, the branch channels 411 are communicated to the vibration base 32, and are disposed toward the inner corners of the sand screening cylinder 1 after inclining towards two sides of the sand screening cylinder 1, so as to form the diamond-shaped sand channel 41 as a whole. The bottom of the branch 411 is provided with a screening platform 412, and the screening platform 412 is arranged parallel to the horizontal plane. The sand is said 41 bottom both sides and is equipped with well sand material and says 43, and well sand material says 43 and inclines to set up towards 1 both sides of a sand screening section of thick bamboo, and sand outlet 12 has been seted up to the last corresponding position of a sand screening section of thick bamboo 1, can discharge well sand. The branch passage 411, the screening platform 412 and the fine sand silo 5 are all provided with a medium sand screen 42 which can separate medium sand from fine sand.

When the cleaning arm 8 is slid by the cleaning hydraulic cylinder 81, the coarse sand filtered on the coarse sand screen 31 can be swept out from the sand outlet 12. The fine sand drops to the fine sand feed bin 5 in through the medium sand screen cloth 42 downwards to transport out through the conveyer belt 6, the medium sand is discharged through the sand outlet 12 that the medium sand material says 43 and corresponds under the action of gravity, thereby accomplish automatic feeding, multistage screening and automatic discharge, the transportation of grit, greatly reduced required manpower.

The present invention is not intended to be limited to the particular embodiments shown above, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a multistage automatic sand screening machine for building, includes a sieve sand section of thick bamboo (1), locates advance sand mouth (11) and go out sand mouth (12) on a sieve sand section of thick bamboo (1), its characterized in that: the sand inlet (11) is connected with a sand shoveling arm (2) for shoveling sand into the sand, and the sand sieving cylinder (1) is sequentially provided with a sand shoveling arm (2) from top to bottom

The primary sand screening unit (3) comprises a coarse sand screen (31) and a vibration base (32) and is used for screening coarse sand and discharging the coarse sand out of the sand screening barrel (1);

the secondary sand screening unit (4) comprises a sand channel (41) which is obliquely arranged and a medium sand screen (42) which is arranged in the sand channel (41) in a surrounding manner and is used for screening medium sand and fine sand and discharging the medium sand out of the sand screening cylinder (1);

the fine sand bin (5) is arranged at the bottom of the sand screening barrel (1) and used for temporarily storing fine sand after screening, a conveying belt (6) is arranged at the bottom of the fine sand bin (5) and used for conveying the fine sand to the outside of a sand outlet (12), the vibration base (32) comprises a base bottom plate (321) which is arranged in a shape like the Chinese character 'ri', vibration parts (7) are arranged in the middle and four corners of the base bottom plate (321), each vibration part (7) comprises an eccentric rotating rod (71) which is rotatably connected to the base bottom plate (321), a sleeve rod (72) is sleeved at the bottom of the eccentric rotating rod (71), a coarse sand screen (31) is connected to the sleeve rod (72), a driving wheel (73) is fixed on the eccentric rotating rod (71) at the middle position of the vibration base (32), a vibration motor (74) is fixed on the vibration base (32), and the driving wheel (73) is driven to rotate through a synchronous belt (75), the eccentric rotating rod (71) comprises a middle disc (, a first eccentric rod (712) and a second eccentric rod (713) are eccentrically fixed on two side surfaces of the middle disc (711), and the first eccentric rod (712) and the second eccentric rod (713) are arranged in a staggered mode.

2. The multi-stage automatic sand screening machine for buildings according to claim 1, wherein: the sand channel (41) comprises a plurality of branch channels (411), the whole sand channel is arranged in a diamond shape and is communicated with the base bottom plate (321), the bottom of the sand channel (41) is provided with a screening platform (412), and the branch channels (411) are arranged towards the screening platform (412).

3. The multi-stage automatic sand screening machine for buildings according to claim 2, wherein: and the two sides of the screening platform (412) are communicated with a medium sand channel (43) for discharging medium sand, and the sand channel (41), the screening platform (412) and the medium sand channel (43) are all coated with a medium sand screen (42).

4. The multi-stage automatic sand screening machine for buildings according to claim 3, wherein: the fine sand silo (5) is positioned below the screening platform (412) and the medium sand material channel (43), and the sand outlet (12) is respectively positioned on the side walls of the sand screening cylinder (1) corresponding to the coarse sand screen (31), the medium sand material channel (43) and the fine sand silo (5).

5. The multi-stage automatic sand screening machine for buildings according to claim 4, wherein: a cleaning arm (8) used for sweeping coarse sand into the sand outlet (12) is horizontally arranged in the sand sieving cylinder (1) above the coarse sand screen (31), and a cleaning hydraulic cylinder (81) is arranged in the sand sieving cylinder (1) and used for driving the cleaning arm (8) to slide.

6. The multi-stage automatic sand screening machine for buildings according to claim 5, wherein: shovel sand arm (2) including rotate connect in sieve sand section of thick bamboo (1) and main armed lever (21) that cavity set up, feed sleeve (22) and the shovel sand board (23) of sliding connection in feed sleeve (22) of intercommunication main armed lever (21), be equipped with in feed sleeve (22) and drive actuating cylinder (24) for drive shovel sand board (23) slide.

7. The multi-stage automatic sand screening machine for buildings according to claim 6, wherein: the sand screening device is characterized in that a driving motor (25) is arranged in the sand screening barrel (1), a rotating shaft (26) is connected to the main arm rod (21) in a rotating mode, a driving worm wheel (27) is fixed to the rotating shaft (26), a driving worm (28) is fixed to an output shaft of the driving motor (25), and the driving worm (28) is meshed with the driving worm wheel (27).