CN113477399B - Sand making method by sand soil - Google Patents

Abstract

The invention relates to the technical field of sand making equipment, and discloses a sand making method by sand, which comprises the following steps: separating the stone blocks by using a vibrating screen for stone block separation, and forming mud and sand slurry from the separated sand soil; dispersing mud and sand slurry by adopting a roller type sand screening device, and screening fine sand and a mixture of coarse sand and sand stone; screening the mixture by adopting a roller sand screening machine, and separating coarse sand and sand stone; adopting a sand washing machine to wash the fine sand and the coarse sand; and adopting iron removing equipment to remove iron from the coarse sand and the fine sand to obtain the fine sand and the coarse sand. The method for preparing sand by using the sandy soil provided by the invention can obviously improve the sand preparation efficiency, reduce the equipment damage rate, reduce the cost and be easy to popularize and use.

Description

Sand making method by sand soil

Technical Field

The invention relates to the technical field of sand making equipment, in particular to a sand making method by sand.

Background

The sand is an indispensable raw material in the building industry, at present, river sand is generally used directly, however, river sand resources are limited, other sand making ways exist at present, however, in the process for preparing industrial sand by adopting mountain sandy soil at present, the sand making efficiency is low, the equipment damage rate is low, and the production cost is high.

Disclosure of Invention

In order to solve the technical problems, the invention provides a sand making method by using sandy soil, which improves sand making efficiency, reduces equipment damage rate and reduces cost.

The technical scheme adopted for solving the technical problems is as follows:

a method for producing sand by sand soil, comprising the following steps:

separating the stone blocks by using a vibrating screen for stone block separation, and forming mud and sand slurry from the separated sand soil;

dispersing mud and sand slurry by adopting a roller type sand screening device, and screening fine sand and a mixture of coarse sand and sand stone;

screening the mixture by adopting a roller sand screening machine, and separating coarse sand and sand stone;

adopting a sand washing machine to wash the fine sand and the coarse sand;

and adopting iron removing equipment to remove iron from the coarse sand and the fine sand to obtain the fine sand and the coarse sand.

Preferably, the vibrating screen for stone separation comprises a first frame, a first discharging groove and a separating net, wherein the first discharging groove and the separating net are arranged on the first frame, a vibrator is arranged at the bottom of the first discharging groove, the separating net is arranged right above the first discharging groove, a plurality of water spraying heads are arranged above the separating net, and water outlets of the water spraying heads are right opposite to the separating net.

Preferably, the water pump comprises a water delivery pipe and a water pump, wherein the water pump is connected with the water inlet end of the water delivery pipe, the water spray heads are connected with the water outlet end of the water delivery pipe, and the water delivery pipe is provided with a pressure increasing valve;

the first frame is gone up and is followed the length direction equipartition of separation net has a plurality of mounting brackets, a plurality of the sprinkler bead equipartition is gone up a plurality of the mounting bracket.

Preferably, the separation net comprises a plurality of parallel and equidistant transverse rods and a plurality of parallel and equidistant longitudinal rods, and the transverse rods and the longitudinal rods are staggered;

the distance between the transverse rods is 40-60 cm, and the distance between the longitudinal rods is 5-15 cm.

Preferably, the roller sand screening device comprises a scattering roller and a screening roller which are coaxially arranged, the screening roller is arranged at the discharge end of the scattering roller, the screening roller is used for screening fine sand, a first receiving hopper is arranged below the screening roller, the scattering roller comprises a roller body, a driving mechanism, a second rack and a supporting wheel arranged on the second rack, two ends of the roller body are fixedly sleeved with rotating rings respectively, the rotating rings are rotatably arranged on the supporting wheel, a plurality of scattering rods are uniformly distributed on the inner wall of the roller body, and the driving mechanism is used for driving the roller body to rotate.

Preferably, the driving mechanism comprises a first motor, a driving gear and a ring gear fixedly sleeved on the roller body, the first motor is fixedly arranged on the second rack, and the driving gear is connected with an output shaft of the first motor and meshed with the ring gear;

the width of the ring gear is a, the length of the roller body is b, a=0.015-0.016 b, and the value range of a is 8-18 cm;

the width of the rotating ring is c, and then c=0.8-0.9 a.

Preferably, the screening roller comprises a cylinder body, wherein a first screen and a second screen are sequentially arranged on the cylinder body at intervals along the radial direction of the cylinder body, and the diameter of screening holes of the first screen is larger than that of screening holes of the second screen;

the cylinder is provided with a plurality of mounting frames, and the first screen and the second screen are arranged on the mounting frames.

Preferably, the roller sand screening machine comprises a third frame, a roller with two open ends, a lubricating oil tank and a second motor for driving the roller to rotate, a rotating shaft is arranged in the roller, two ends of the rotating shaft are connected with the third frame through bearings, the lubricating oil tank is connected with the bearings through oil delivery pipes, a screen is coated on the roller, and a second receiving hopper is arranged at the bottom of the third frame corresponding to the roller. .

Preferably, a first bearing and a second bearing are respectively arranged at two ends of the rotating shaft, a first lubrication pipe is connected to the first bearing, a second lubrication pipe is arranged on the second bearing, and the first lubrication pipe and the second lubrication pipe are both connected with the oil conveying pipe;

the lubricating device comprises a three-way valve, wherein the first lubricating pipe, the second lubricating pipe and the oil conveying pipe are respectively connected with the three-way valve.

Preferably, the iron removing device comprises a strip-shaped second discharging groove, a flat feeding box is arranged in the second discharging groove, one end of the feeding box is provided with an opening for feeding, a plurality of discharging holes are uniformly distributed on the upper surface of the feeding box, iron removing pipes are arranged on the discharging holes, and magnets are arranged in the iron removing pipes;

and the distance between the axes of two adjacent iron removing pipes is s, and the width of the feeding box is a, so that s=0.16-0.23 a.

Compared with the prior art, the sand making method by the sand has the beneficial effects that: by adopting the method provided by the invention to prepare sand, the sand preparation efficiency can be obviously improved, the equipment damage rate can be reduced, and the cost can be reduced.

Drawings

FIG. 1 is a flow chart of the sand making method of the present invention.

Fig. 2 is a schematic structural view of the vibrating screen for stone separation according to the present invention.

Fig. 3 is a top view of the vibrating screen for stone separation of the present invention.

Fig. 4 is a schematic structural view of a drum-type sand screening device of the present invention.

Fig. 5 is a cross-sectional view of fig. 4.

Fig. 6 is a schematic structural view of a drum type sand screening machine of the present invention.

Fig. 7 is a schematic structural view of the iron removing apparatus of the present invention.

Fig. 8 is a front view of the feed box of the present invention.

Wherein: 1. the vibrating screen for separating stone blocks comprises a first frame 11-a first discharge chute 12-a separating net 13-a vibrator 14-a water spray nozzle 15-a water pipe 16-a pressurizing valve 17-a pressure valve 18-a mounting frame 19-a cross bar 110-a longitudinal bar 111-a water pump 2-a drum sand screening device 21-a drum body 22-a second frame 23-a supporting wheel 24-a rotating ring 25-a scattering bar 26-a first motor 27-a driving gear 28-a ring gear 29-a mounting seat 210-a supporting plate 211-a limiting ring 212-a first receiving hopper 213-a drum body 214-a first screen 215-a second screen, 216-mounting frame, 2100-scattering roller, 2200-screening roller, 3-roller sand screening machine, 31-third rack, 32-roller, 33-lubricating oil tank, 34-second motor, 35-rotating shaft, 36-first bearing, 37-second bearing, 38-oil delivery pipe, 39-second receiving hopper, 310-three-way valve, 311-bearing seat, 312-connecting pipe, 313-speed regulating switch, 314-oil collecting tank, 315-oil return pipe, 316-one-way valve, 317-first filter screen, 318-oil pump, 4-iron removing equipment, 41-second discharge chute, 42-feeding box, 43-iron removing pipe, 44-magnet, 45-second filter screen, 46-fixing frame.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.

As shown in fig. 1, a method for producing sand from sandy soil according to a preferred embodiment of the present invention includes the following steps:

separating stone by using a vibrating screen 1 for stone separation, and forming mud and sand slurry from the separated sand;

referring to fig. 2-3, in this embodiment, the vibrating screen 1 for stone separation includes a first frame 11, a first discharge chute 12 disposed on the first frame 11, and a separation net 13, wherein a vibrator 14 is disposed at the bottom of the first discharge chute 12, and meanwhile, the first discharge chute 12 is obliquely disposed, and an included angle between the bottom surface and a horizontal plane is 2-20 degrees, such as 10 degrees, 15 degrees, etc., so as to fully ensure the discharge of the slurry. The separation net 13 is arranged right above the first discharging chute 12, a plurality of water spraying heads 15 are arranged above the separation net 13, and water outlets of the water spraying heads 15 are arranged right opposite to the separation net 3. In the process of preparing industrial sand by adopting mountain sandy soil, water and sandy soil are firstly mixed into mud and sand slurry, then the mud and sand slurry is separated through mortar, and then the mud and sand slurry is screened and washed by a screening sand machine, so that the industrial sand is prepared, however, at present, water is directly added into the sandy soil when the sandy soil and the water are mixed, larger stones tend to exist in the sandy soil, the stones are not separated and directly enter the subsequent process, and the subsequent equipment is damaged, so that the sand preparation is influenced.

According to the invention, the separating net 13 is arranged above the first discharging chute 12, sand and soil raw materials are directly conveyed to the separating net 13 during mixing, then the water spray head 15 sprays water to sand and soil, silt slurry enters the first discharging chute 12 through the separating net 13 to enter the subsequent process, and stones are separated and left on the separating net 13, so that stones are separated in the process of mixing water and sand and soil to form silt slurry, the stones are prevented from damaging subsequent equipment, and normal sand making is ensured.

In this embodiment, the vibrating screen 1 for stone separation further includes a water pipe 16 and a water pump 111, the water pump 11 is connected to a water inlet end of the water pipe 16, a plurality of water spray heads 15 are all connected to a water outlet end of the water pipe 16, a pressure increasing valve 17 is disposed on the water pipe 16, and the pressure increasing valve 17 is disposed to increase water spray pressure of the water spray heads 15, so that stones can be separated better. Meanwhile, in order to ensure the separation effect, a plurality of mounting frames 18 are uniformly distributed on the first frame 11 along the length direction of the separation net 13, a plurality of water spraying heads 15 are uniformly distributed on a plurality of mounting frames 18, for example, the number of the mounting frames 18 is three, the number of the water spraying heads 15 is twelve, and then one mounting frame 18 is provided with four water spraying heads 15, so that the separation net 13 can be guaranteed to be flushed with stones everywhere, and separation dead angles are avoided.

In this embodiment, the separating net 13 includes a plurality of parallel and equally spaced cross bars 19 and a plurality of parallel and equally spaced longitudinal bars 110, and a plurality of cross bars 19 and a plurality of longitudinal bars 110 are staggered. The cross bars 19 are spaced 40-60 cm, such as 50 cm, and the side bars 110 are spaced 5-15 cm, such as 10 cm. In addition, since the stone is heavy and needs to bear the weight of the sediment, the cross bars 19 and the longitudinal bars 110 need to ensure the strength, preferably, the longitudinal bars 110 are made of steel bars, and the nominal diameter of the longitudinal bars is 10-15 mm, and the steel bars are convenient to manufacture and can ensure the strength.

The roller sand screening device 2 is adopted to scatter mud and sand slurry and screen fine sand and the mixture of coarse sand and sand stone.

As shown in fig. 4-5, in this embodiment, the roller sand screening device 2 includes a scattering roller 2100 and a screening roller 2200 that are coaxially disposed, and the screening roller 200 is disposed at a discharge end of the scattering roller 100, the screening roller 2200 is configured to screen fine sand, a first receiving hopper 212 is disposed below the scattering roller, the scattering roller 2100 includes a roller body 21, a driving mechanism, a second frame 22, and a supporting wheel 23 disposed on the second frame 22, two ends of the roller body 21 are respectively fixedly sleeved with a rotating ring 24, and the rotating ring 24 is rotatably disposed on the supporting wheel 23, and a plurality of scattering rods 25 are uniformly disposed on an inner wall of the roller body 21, and the driving mechanism is configured to drive the roller body 21 to rotate. Through setting up a plurality of bars 25 of scattering in the cylinder body 21, the cylinder body 21 rotates under actuating mechanism's effect during the use, and the silt of bonding gets into the cylinder body 21 along with rivers, is scattered along its flow direction under the dual effect of the bars 25 of scattering and the pivoted of cylinder body 21 to the screening effect when having guaranteed the follow-up sand screening machine that gets into.

In the process of preparing industrial sand by adopting mountain sandy soil, sand with different particle size grades is needed to be screened out by a sand screening machine with a screen, then sand with larger particles and smaller quantity of sand is screened out in the existing manufacturing process, and coarse sand and fine sand are screened out by the sand according to different particle sizes, but because the larger sand is less, the total sand amount in the sand screening process is not greatly different from that in the subsequent coarse sand screening process, the time for twice screening is longer, and the screening efficiency is low. On the other hand, before screening sand, the bonded silt needs to be scattered by using a scattering roller, and the process is only performed with scattering and has no other functions. According to the invention, the screening roller 2200 for screening fine sand is arranged at the discharge end of the scattering roller 2100, when silt is scattered and flows into the screening roller 2200 along with water flow, the screening roller 2200 rotates along with the scattering roller 2100, and the screened fine sand enters the first receiving hopper 212, so that the fine sand is screened in the scattering process, and the total screening amount is smaller when sand and coarse sand are screened firstly, and the subsequent screening efficiency can be improved.

In this embodiment, the driving mechanism includes a first motor 26, a driving gear 27, and a ring gear 28 fixedly sleeved on the roller body 21, the first motor 26 is fixedly disposed on the second frame 22, and the driving gear 27 is connected to an output shaft of the first motor and is meshed with the ring gear 28. When in operation, the first motor 26 is started to drive the driving gear 27 to rotate, and the roller body 21 rotates under the engagement of the driving gear 27 and the ring gear 28, so as to break up sediment. Meanwhile, in order to ensure the meshing effect of the driving gear 27 and the ring gear 28, a mounting seat 29 is provided on the second frame 22, a strip-shaped mounting hole is provided on the mounting seat 29, and the first motor 26 is fixedly arranged on the mounting hole, so that the position of the first motor 26 can be adjusted according to the position of the ring gear 28 during mounting, namely, the position of the driving gear 27 is adjusted, and the driving effect is ensured.

In this embodiment, the roller body 21 has a larger size, and is filled with more sediment and water during operation, and needs to rotate at the same time, so that the strength of the ring gear 28 needs to be ensured, and damage is avoided. Preferably, if the width of the ring gear 8 is a and the length of the roller body 1 is b, a=0.015-0.016 b, and the value of a is 8-18 cm, the width of the driving gear 27 is the same as that of the ring gear 28. Meanwhile, the size of the rotating ring 24 is also guaranteed, and preferably, if the width of the rotating ring 24 is c, c=0.8-0.9 a.

In this embodiment, each of the rotating rings 24 is supported on two supporting wheels 23, and the two supporting wheels 23 are respectively disposed on two sides of the roller body 21, so as to ensure stability of the roller body 21. The supporting wheel 23 is provided with a rotating shaft in a penetrating way, two ends of the rotating shaft are rotatably connected with the upper end of the supporting plate 210, and the lower end of the supporting plate 210 is connected with the second frame 22. Meanwhile, in order to ensure the relative rotation effect between the rotating ring 24 and the supporting wheel 23, the offset is avoided in the rotation process, two ends of the supporting wheel 23 are provided with limiting rings 211, and the rotating ring 24 is arranged between the two limiting rings 211.

In this embodiment, the sieving roller 2200 includes a cylindrical body 213, a first screen 214 and a second screen 215 are sequentially disposed on the cylindrical body 213 along a radial direction thereof, a diameter of a passing hole of the first screen 214 is larger than a diameter of a passing hole of the second screen 215, and the first screen 214 is flush with an inner surface of the roller body 21. The fine sand passes through the first screen 214 and the second screen 215 in turn during rotation, and finally flows into the first receiving hopper 212 through the second screen 215. Larger sand is blocked by the first screen 214 and then goes to the next process; the coarse sand passes through the first screen 214, and flows between the first screen 214 and the second screen 215 to the sand screening machine in the next step. Therefore, the screening process of fine sand is performed according to the screening sequence of sand stone, coarse sand and fine sand, and the screening efficiency is improved. In addition, in order to avoid the local damage of the first screen 214 or the second screen 215 and the need to replace the whole screen, resources are wasted and cost is increased, the cylinder 213 is provided with a plurality of mounting frames 216, and the first screen 214 and the second screen 215 are both arranged on the mounting frames 216. Therefore, the first screen 214 and the second screen 215 are divided into a plurality of small blocks, and only the corresponding screen is needed to be replaced when a certain block is damaged, so that the screens can be fully utilized and are convenient to replace;

and screening the mixture by adopting a roller sand screening machine 3 to separate coarse sand and sand stone.

As shown in fig. 6, in this embodiment, the roller sand screening machine includes a third frame 31, a roller 32 with two open ends, a lubricant tank 33, and a second motor 34 for driving the roller 32 to rotate, where the lubricant tank 33 is used for containing lubricant, one end of the roller 32 is connected with a feed hopper, a rotating shaft 35 is disposed in the roller 32, two ends of the rotating shaft 35 are connected with the third frame 31 through bearings, the lubricant tank 33 is connected with the bearings through oil pipes 38, a screen is coated on the roller 32, and a second receiving hopper 39 is disposed at the bottom of the third frame 31 corresponding to the roller 32. Through setting up lubricating oil tank 33 to be connected lubricating oil tank 33 and bearing through oil pipe 38, can lubricate the bearing in real time in the course of the work, avoided the bearing to damage, thereby guaranteed the normal work of screening sand machine.

In this embodiment, the two ends of the rotating shaft 35 are respectively provided with a first bearing 36 and a second bearing 37, the first bearing 36 is connected with a first lubrication pipe, the second bearing 37 is provided with a second lubrication pipe, and the first lubrication pipe and the second lubrication pipe are both connected with the oil delivery pipe 38, so that one lubrication oil tank 33 can supply oil to two bearings at the same time. When the sand screening machine is specifically installed, the sand screening machine further comprises a three-way valve 310, and the first lubrication pipe, the second lubrication pipe and the oil conveying pipe 38 are respectively connected with the three-way valve 310. Meanwhile, in order to facilitate the adjustment of the oil intake, the oil delivery pipe 38 is provided with a speed regulating switch 313.

In this embodiment, in order to facilitate connection between the bearing and the oil delivery pipe 38, a bearing seat 311 for mounting the bearing is disposed on the third frame 31, a connection pipe 312 is disposed on the bearing seat 311, the connection pipe 312 is made of metal, one end of the connection pipe 312 passes through a side wall of the bearing seat 311 to connect with the bearing, and the other end of the connection pipe 312 is connected with the oil delivery pipe 38. Specifically, the connecting pipe 312 on the first bearing 36 is connected to the first lubrication pipe, the connecting pipe 312 on the second bearing 37 is connected to the second lubrication pipe, and the first lubrication pipe and the second lubrication pipe are connected to the oil delivery pipe 38 through the three-way valve 310.

In this embodiment, an oil collecting tank 314 is disposed below the bearing, the oil collecting tank 314 is connected with the lubricating oil tank 33 through an oil return pipe 315, and the oil return pipe 315 is provided with a check valve 316 and an oil pump 318. Since the bearings are lubricated in real time, excessive lubricating oil flows out, and the lubricating oil flowing out can be collected by providing the oil collecting groove 314, the collected lubricating oil is again transferred to the lubricating oil tank 33 through the oil pump 318, thereby realizing recycling of the lubricating oil. The check valve 316 is disposed between the oil pump 318 and the oil tank 33, and prevents the oil in the oil tank 33 from flowing back into the oil sump 314. The bottom of oil collecting tank 314 is equipped with the oil return mouth, return oil pipe 315 is connected return oil mouth, be equipped with first filter screen 317 on the oil return mouth, through setting up first filter screen 317, can guarantee follow oil collecting tank 314 is retrieved the cleanliness factor of the lubricating oil in the lubricating oil tank 33. The damage of impurities in the lubricating oil to the bearing is avoided;

adopting a sand washing machine to wash the fine sand and the coarse sand;

and adopting iron removing equipment 4 to remove iron from the coarse sand and the fine sand to obtain the fine sand and the coarse sand.

As shown in fig. 7-8, in this embodiment, the iron removing device 4 includes a strip-shaped second discharge chute 41, a flat feeding box 42 is disposed in the second discharge chute 41, an opening at one end of the feeding box 42 is used for feeding, a plurality of discharge holes are uniformly distributed on the upper surface of the feeding box 42, iron removing pipes 43 are disposed on the discharge holes, and magnets 44 are disposed in the iron removing pipes 43. When the iron removal pipes 43 are arranged, if the distance between the axes of two adjacent iron removal pipes 43 is s, and the width of the feeding box 42 is a, s=0.16-0.23 a. The existing iron removal equipment is poor in iron removal effect, iron cannot be removed completely, and the use of subsequent equipment is affected. This application sets up a plurality of discharge holes through the upper surface at feeding case 42, sets up deironing pipe 43 on the discharge hole, sets up magnet 44 in the deironing pipe 43, and the sand after washing the sand gets into feeding case 42 along with rivers from the opening of feeding case 42, then discharges through deironing pipe 43 from each discharge hole, owing to be equipped with magnet 44 in the deironing pipe 43, and the flow through the sand of every deironing pipe 43 is less to can fully guarantee the deironing effect of the sand of flowing through every deironing pipe 43, guarantee the normal use of follow-up equipment.

In this embodiment, a second filter screen 45 is disposed at the open end of the feeding box 42. By arranging the second filter screen 45, sand entering the feeding box 42 can be filtered, larger impurities are prevented from entering the feeding box 42 to block the discharging hole, and the normal running of iron removal is ensured.

In this embodiment, the fixing frame 46 is disposed on the feeding box 42, the middle parts of the iron removing pipes 43 are fixed on the fixing frame 46, the lower ends of the iron removing pipes 43 are in threaded connection with the feeding box 42, and meanwhile, the fixing frame 46 connects all the iron removing pipes 43 into a whole, thereby ensuring the stability of the fixing frame 46.

In this embodiment, the magnet 44 has a cylindrical shape, and an outer diameter thereof is smaller than an inner diameter of the iron removing pipe 43, so that sand is ensured to flow out normally from between the magnet 44 and the iron removing pipe 43. Specifically, the outer diameter of the magnet 44 is smaller than the inner diameter of the iron removing pipe 43 by 1 to 4 mm, such as 2 cm, 3 cm, etc., and the outer diameter of the magnet 44 is 8 to 20 mm, such as 12 cm, 16 cm, etc. Specifically according to the particle size of the sand.

In this embodiment, the feeding box 42 is disposed at the front end of the second discharge chute 41, and the width of the feeding box 42 is the same as the width of the second discharge chute 41, so that the sand and year old water flow after iron removal flows out from the rear end of the second discharge chute 41 to enter the next process.

By adopting the method provided by the invention to prepare sand, the sand preparation efficiency can be obviously improved, the equipment damage rate can be reduced, and the cost can be reduced.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.

Claims (9)

1. A method for preparing sand from sandy soil is characterized by comprising the following steps: the method comprises the following steps:

separating the stone blocks by using a vibrating screen for stone block separation, and forming mud and sand slurry from the separated sand soil;

dispersing mud and sand slurry by adopting a roller type sand screening device, and screening fine sand and a mixture of coarse sand and sand stone;

screening the mixture by adopting a roller sand screening machine, and separating coarse sand and sand stone;

adopting a sand washing machine to wash the fine sand and the coarse sand;

iron is removed from the coarse sand and the fine sand by adopting iron removing equipment, so that the fine sand and the coarse sand are obtained;

the iron removing device comprises a strip-shaped second discharging groove, a flat feeding box is arranged in the second discharging groove, one end of the feeding box is opened for feeding, a second filter screen is arranged at the opening end of the feeding box, a plurality of discharging holes are uniformly distributed on the upper surface of the feeding box, iron removing pipes are arranged on the discharging holes, and magnets are arranged in the iron removing pipes;

and the distance between the axes of two adjacent iron removing pipes is s, and the width of the feeding box is a, so that s=0.16-0.23 a.

2. The method for producing sand by using sandy soil according to claim 1, wherein: the vibrating screen for stone separation comprises a first frame, a first discharge chute and a separation net, wherein the first discharge chute and the separation net are arranged on the first frame, a vibrator is arranged at the bottom of the first discharge chute, the separation net is arranged right above the first discharge chute, a plurality of water spraying heads are arranged above the separation net, and water outlets of the water spraying heads are right opposite to the separation net.

3. The method for producing sand by using sandy soil according to claim 2, wherein: the water pump is connected with the water inlet end of the water pipe, the water spray heads are connected with the water outlet end of the water pipe, and the water pipe is provided with a booster valve;

the first frame is gone up and is followed the length direction equipartition of separation net has a plurality of mounting brackets, a plurality of the sprinkler bead equipartition is gone up a plurality of the mounting bracket.

4. A method of producing sand from sand as claimed in claim 3 wherein: the separation net comprises a plurality of parallel and equidistant transverse rods and a plurality of parallel and equidistant longitudinal rods, and the transverse rods and the longitudinal rods are staggered;

the distance between the transverse rods is 40-60 cm, and the distance between the longitudinal rods is 5-15 cm.

5. The method for producing sand by using sandy soil according to claim 1, wherein: the roller type sand screening device comprises a scattering roller and a screening roller which are coaxially arranged, the screening roller is arranged at the discharge end of the scattering roller, the screening roller is used for screening fine sand, a first receiving hopper is arranged below the screening roller, the scattering roller comprises a roller body, a driving mechanism, a second rack and a supporting wheel arranged on the second rack, rotating rings are fixedly sleeved at two ends of the roller body respectively, the rotating rings are rotatably arranged on the supporting wheel, a plurality of scattering rods are uniformly distributed on the inner wall of the roller body, and the driving mechanism is used for driving the roller body to rotate.

6. The method for producing sand by using sandy soil according to claim 5, wherein: the driving mechanism comprises a first motor, a driving gear and a ring gear fixedly sleeved on the roller body, the first motor is fixedly arranged on the second rack, and the driving gear is connected with an output shaft of the first motor and meshed with the ring gear;

the width of the ring gear is a, the length of the roller body is b, a=0.015-0.016 b, and the value range of a is 8-18 cm;

the width of the rotating ring is c, and then c=0.8-0.9 a.

7. The method for producing sand by using sandy soil according to claim 5, wherein: the screening roller comprises a roller body, a first screen and a second screen are sequentially arranged on the roller body at intervals along the radial direction of the roller body, and the diameter of screening holes of the first screen is larger than that of screening holes of the second screen;

the cylinder is provided with a plurality of mounting frames, and the first screen and the second screen are arranged on the mounting frames.

8. The method for producing sand by using sandy soil according to claim 1, wherein: the roller type sand screening machine comprises a third frame, rollers with two openings at two ends, a lubricating oil tank and a second motor for driving the rollers to rotate, a rotating shaft is arranged in the rollers, two ends of the rotating shaft are connected with the third frame through bearings, the lubricating oil tank is connected with the bearings through oil delivery pipes, a screen is coated on the rollers, and a second receiving hopper is arranged at the bottom of the third frame corresponding to the rollers.

9. The method for producing sand from sand as claimed in claim 8, wherein: the two ends of the rotating shaft are respectively provided with a first bearing and a second bearing, the first bearing is connected with a first lubricating pipe, the second bearing is provided with a second lubricating pipe, and the first lubricating pipe and the second lubricating pipe are both connected with the oil conveying pipe;

the lubricating device comprises a three-way valve, wherein the first lubricating pipe, the second lubricating pipe and the oil conveying pipe are respectively connected with the three-way valve.