CN113477399A - Method for preparing sand from sandy soil - Google Patents

Abstract

The invention relates to the technical field of sand making equipment, and discloses a method for making sand by sandy soil, which comprises the following steps: separating the stones by using a vibrating screen for stone separation, and forming the separated sandy soil into silt slurry; scattering the silt slurry by adopting a drum-type sandy soil screening device, and screening fine sand and a mixture of coarse sand and gravel; screening the mixture by a drum-type sand screening machine, and separating coarse sand and gravel; cleaning fine sand and coarse sand by using a sand washer; and (4) adopting iron removal 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 from sandy soil provided by the invention can obviously improve the sand preparation efficiency, reduce the equipment damage rate and reduce the cost, and is easy to popularize and use.

Description

Method for preparing sand from sandy soil

Technical Field

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

Background

The sand is an essential raw material in the building industry, at present, the river sand is directly used, but the river sand resource is limited, at present, other sand making approaches are available, but in the process of preparing industrial sand by adopting mountain sand, 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 method for preparing sand by sandy soil, which improves sand preparation efficiency, reduces equipment damage rate and reduces cost.

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

a method for preparing sand from sandy soil comprises the following steps:

separating the stones by using a vibrating screen for stone separation, and forming the separated sandy soil into silt slurry;

scattering the silt slurry by adopting a drum-type sandy soil screening device, and screening fine sand and a mixture of coarse sand and gravel;

screening the mixture by a drum-type sand screening machine, and separating coarse sand and gravel;

cleaning fine sand and coarse sand by using a sand washer;

and (4) adopting iron removal 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 discharge chute and a separation net, 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 spray heads are arranged above the separation net, and water outlets of the water spray heads are opposite to the separation net.

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

a plurality of mounting brackets are uniformly distributed on the first machine frame along the length direction of the separation net, and a plurality of water spraying heads are uniformly distributed on the mounting brackets.

Preferably, the separation net comprises a plurality of cross rods arranged in parallel at equal intervals and a plurality of longitudinal rods arranged in parallel at equal intervals, and the cross rods and the longitudinal rods are arranged in a staggered manner;

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

Preferably, drum-type sandy soil screening plant includes the cylinder and the screening cylinder of breaing up of coaxial setting, just the screening cylinder sets up the discharge end of cylinder of breaing up, the screening cylinder is used for screening fine sand, and its below is equipped with first hopper that connects, the cylinder of breaing up includes cylinder body, actuating mechanism, second frame and setting supporting wheel in the second frame, the fixed cover is equipped with the swivel becket respectively at the both ends of cylinder body, just the swivel becket rotationally locates on the supporting wheel, the inner wall equipartition of gyro wheel body has a plurality of poles of breaing up, actuating mechanism is used for the drive the cylinder body rotates.

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, and then a is 0.015-0.016b, and the value range of a is 8-18 cm;

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

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

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

Preferably, drum-type screening sand machine includes third frame, both ends open-ended cylinder, lubricating-oil tank and drive cylinder pivoted second motor, be equipped with the pivot in the cylinder, the bearing is passed through at the both ends of pivot and is connected the third frame, the lubricating-oil tank passes through defeated oil pipe and connects the bearing, the cladding has the screen cloth on the cylinder, the bottom of third frame corresponds the cylinder is equipped with the second and connects the hopper. .

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

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 equipment comprises a strip-shaped second discharge chute, a flat feeding box is arranged in the second discharge chute, an opening at one end of the feeding box is used for feeding, a plurality of discharge holes are uniformly distributed on the upper surface of the feeding box, iron removing pipes are arranged on the discharge holes, and magnets are arranged in the iron removing pipes;

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

Compared with the prior art, the method for preparing sand from sandy soil has the beneficial effects that: the sand making method provided by the invention can obviously improve the sand making efficiency, reduce the equipment damage rate and reduce the cost.

Drawings

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

Fig. 2 is a schematic structural view of the vibration sieve for stone separation of 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 the drum type sandy soil 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 according to the present invention.

Fig. 7 is a schematic structural diagram of an iron removal apparatus according to the present invention.

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

Wherein: 1. the stone separation device comprises a vibrating screen for stone separation, 11-a first frame, 12-a first discharge chute, 13-a separation net, 14-a vibrator, 15-a water spray head, 16-a water delivery pipe, 17-a booster valve, 18-a mounting frame, 19-a cross rod, 110-a longitudinal rod, 111-a water pump, a 2-drum type sandy soil screening device, 21-a drum body, 22-a second frame, 23-a supporting wheel, 24-a rotating ring, 25-a scattering rod, 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 mesh, 215-a second screen mesh, 216-a mounting frame and 2100-a scattering drum, 2200-screening roller, 3-drum type sand screening machine, 31-third frame, 32-roller, 33-lubricating oil tank, 34-second motor, 35-rotating shaft, 36-first bearing, 37-second bearing, 38-oil pipeline, 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 discharging tank, 42-feeding tank, 43-iron removing pipe, 44-magnet, 45-second filter screen and 46-fixing frame.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

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

separating the stones by using a vibrating screen 1 for stone separation, and forming the separated sandy soil into a slurry;

referring to fig. 2-3, in the present embodiment, the vibrating screen 1 for stone separation includes a first frame 11, a first discharging chute 12 disposed on the first frame 11, and a separating net 13, wherein a vibrator 14 is disposed at the bottom of the first discharging chute 12, and the first discharging chute 12 is disposed in an inclined manner, and an included angle between the bottom surface of the first discharging chute 12 and a horizontal plane is 2-20 degrees, such as 10 degrees or 15 degrees, so as to sufficiently ensure discharging of silt. The separation net 13 is arranged right above the first discharge 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 required to be mixed into silt slurry, then the silt slurry is separated by mortar, and then the silt slurry is prepared by screening and washing by a sand screening machine.

According to the invention, the separation net 13 is arranged above the first discharge chute 12, sand and soil raw materials are directly sent to the separation net 13 during mixing, then the water spray head 15 sprays water to the sand and soil, the silt slurry enters the first discharge chute 12 through the separation net 13 to enter the subsequent process, and the stone blocks are separated and remained on the separation net 13, so that the stone blocks are separated in the process of mixing the water and the silt slurry, the subsequent equipment is prevented from being damaged by the stone blocks, and the normal operation of sand making is ensured.

In this embodiment, the vibrating screen 1 for separating stone 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, the plurality of water spray heads 15 are all connected to a water outlet end of the water pipe 16, the water pipe 16 is provided with a pressure increasing valve 17, and the pressure increasing valve 17 can increase the water spray pressure of the water spray heads 15 to better separate stone. Meanwhile, in order to ensure the separation effect, a plurality of mounting frames 18 are uniformly distributed on the first rack 11 along the length direction of the separation net 13, the plurality of water spraying heads 15 are uniformly distributed on the plurality of mounting frames 18, for example, the three mounting frames 18 are provided, the twelve water spraying heads 15 are provided, and one water spraying head 15 is provided on the mounting frame 18, so that the four water spraying heads 15 can be arranged on the separation net 13, and the separation dead angle can be avoided.

In this embodiment, the separation net 13 includes a plurality of cross bars 19 arranged in parallel and at equal intervals and a plurality of longitudinal bars 110 arranged in parallel and at equal intervals, and the plurality of cross bars 19 and the plurality of longitudinal bars 110 are arranged in a staggered manner. The distance between the transverse bars 19 is 40-60 cm, such as 50 cm, and the distance between the longitudinal bars 110 is 5-15 cm, such as 10 cm. In addition, because the stone block is heavier and needs to bear the weight of silt, the strength of the cross rod 19 and the strength of the longitudinal rod 110 need to be guaranteed, preferably, the longitudinal rod 110 is made of steel bars, the nominal diameter of the steel bars is 10-15 mm, and the steel bars are convenient to manufacture and the strength of the steel bars can be guaranteed.

The mud-sand slurry is scattered by a drum-type sand screening device 2, and fine sand and a mixture of coarse sand and gravel are screened out.

As shown in fig. 4-5, in this embodiment, the drum-type sandy soil screening device 2 includes a scattering drum 2100 and a screening drum 2200 coaxially disposed, the screening drum 200 is disposed at a discharge end of the scattering drum 100, the screening drum 2200 is used for screening fine sand, a first receiving hopper 212 is disposed below the screening drum 2200, the scattering drum 2100 includes a drum body 21, a driving mechanism, a second frame 22 and a supporting wheel 23 disposed on the second frame 22, rotating rings 24 are respectively fixedly disposed at two end portions of the drum body 21, the rotating rings 24 are rotatably disposed on the supporting wheel 23, a plurality of scattering rods 25 are uniformly distributed on an inner wall of the drum body 21, and the driving mechanism is used for driving the drum body 21 to rotate. Through set up a plurality of poles 25 of breaing up in cylinder body 21, cylinder body 21 rotates under actuating mechanism's effect during the use, and the silt of bonding gets into cylinder body 21 along with rivers, is breaing up pole 25 and cylinder body 21 pivoted dual function down and is broken up along its flow direction to screening effect when having guaranteed follow-up entering screening sand machine.

In the process of preparing industrial sand by adopting mountain sand, sand with different particle size grades needs to be screened by a sand screening machine with a screen, then, sand with larger particles and smaller quantity is screened out in the existing manufacturing process, and then, the sand is screened out with coarse sand and fine sand according to different particle sizes, but because the larger sand is less, the difference between the total sand quantity in the sand screening process and the subsequent coarse sand screening process is not large, the time for two-time screening is longer, and the screening efficiency is low. On the other hand, before screening sand, the adhered silt needs to be scattered by using a scattering roller, and the scattering is only carried out in the process, so that other functions are not provided. 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 then 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 less when the fine sand with more fine sand is screened firstly and then the sand and the coarse sand are screened, so that 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 drum 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 engaged with the ring gear 28. During operation first motor 26 starts, drives driving gear 27 rotates driving gear 27 with the meshing of ring gear 28 is down the cylinder body 21 rotates, realizes breaing up of silt. Meanwhile, in order to ensure the meshing effect between the driving gear 27 and the ring gear 28, the second frame 22 is provided with a mounting seat 29, the mounting seat 29 is provided with a strip-shaped mounting hole, 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 installation, that is, the position of the driving gear 27 is adjusted, and the driving effect is ensured.

In this embodiment, the size of the roller body 21 is large, and a large amount of silt and water are also filled in the roller body during operation, and meanwhile, the roller body needs to rotate, so that the strength of the ring gear 28 needs to be ensured, and the roller body is prevented from being damaged. Preferably, if the width of the ring gear 8 is a and the length of the drum body 1 is b, a is 0.015 to 0.016b, and a ranges from 8 cm to 18 cm, and 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 needs to be ensured, and preferably, if the width of the rotating ring 24 is c, c is 0.8-0.9 a.

In this embodiment, each of the rotating rings 24 is supported on two of the 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 manner, the 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 and avoid the deviation in the rotation process, two limiting rings 211 are arranged at two ends of the supporting wheel 23, and the rotating ring 24 is arranged between the two limiting rings 211.

In this embodiment, the screen drum 2200 includes a drum 213, the drum 213 is provided with a first screen 214 and a second screen 215 sequentially at intervals along a radial direction thereof, a diameter of a mesh opening of the first screen 214 is larger than a diameter of a mesh opening of the second screen 215, and the first screen 214 is flush with an inner surface of the drum body 21. The fine sand passes through the first screen 214 and the second screen 215 in sequence during the rotation process, and finally flows into the first receiving hopper 212 through the second screen 215. The larger sand is blocked by the first screen 214 and then enters the next process; the coarse sand passes through the first screen 214, and flows into a sand screen of the next process between the first screen 214 and the second screen 215. Therefore, the fine sand screening process is carried out according to the screening sequence of the sand, the coarse sand and the fine sand, and the screening efficiency is improved. In addition, in order to avoid local damage to the first screen 214 or the second screen 215 and the need to replace the whole screen, which wastes resources and increases cost, a plurality of mounting frames 216 are provided on the cylinder 213, and the first screen 214 and the second screen 215 are both provided on the mounting frames 216. Therefore, the first screen 214 and the second screen 215 are divided into a plurality of small blocks, and when a certain block is damaged, only the corresponding screen needs to be replaced, so that the screens can be fully utilized and are convenient to replace;

and screening the mixture by using a drum-type sand screening machine 3 to separate coarse sand and gravel.

As shown in fig. 6, in this embodiment, the drum-type sand screening machine includes a third frame 31, a roller 32 with openings at two ends, a lubricating oil tank 33 and a drive, the second motor 34 for rotating the roller 32, the lubricating oil tank 33 is used for containing lubricating oil, one end of the roller 32 is connected with the feed hopper, a rotating shaft 35 is arranged in the roller 32, two ends of the rotating shaft 35 are connected with the third frame 31 through bearings, the lubricating oil tank 33 is connected with the bearings through an oil pipe 38, the roller 32 is coated with a screen, and the bottom of the third frame 31 corresponds to the roller 32 and is provided with a second receiving hopper 39. Through setting up lubricating-oil tank 33 to being connected lubricating-oil tank 33 and bearing through defeated oil pipe 38, can lubricate the bearing in real time at the course of the work, avoided the bearing to damage, thereby guaranteed the normal work of screening sand machine.

In this embodiment, the both ends of pivot 35 are equipped with first bearing 36 and second bearing 37 respectively, be connected with first lubricated pipe on the first bearing 36, be equipped with the lubricated pipe of second on the second bearing 37, first lubricated pipe reaches the lubricated pipe of second all with defeated oil pipe 38 is connected, thereby has realized one lubricated oil tank 33 can be two simultaneously the bearing fuel feeding. During the specific installation, the drum-type sand screening machine further comprises a three-way valve 310, and the first lubricating pipe, the second lubricating pipe and the oil delivery pipe 38 are respectively connected with the three-way valve 310. Meanwhile, in order to adjust the oil inlet amount, a speed adjusting switch 313 is arranged on the oil delivery pipe 38.

In this embodiment, for convenience the bearing with defeated oil pipe 38 is connected, be equipped with on the third frame 31 and be used for the installation the bearing frame 311 of bearing, be equipped with connecting pipe 312 on the bearing frame 311, the material of connecting pipe 312 is the metal, the one end of connecting pipe 312 is passed the lateral wall of bearing frame 311 is connected the bearing, the other end of connecting pipe 312 is connected defeated oil pipe 38. Specifically, the connecting pipe 312 of the first bearing 36 is connected to the first lubrication pipe, the connecting pipe 312 of the second bearing 37 is connected to the second lubrication pipe, and the first and second lubrication pipes are connected to the oil delivery pipe 38 through the three-way valve 310.

In this embodiment, an oil collecting tank 314 is arranged below the bearing, the oil collecting tank 314 is connected with the lubricating oil tank 33 through an oil return pipe 315, and a check valve 316 and an oil pump 318 are arranged on the oil return pipe 315. Since the bearings are lubricated in real time, the excessive lubricating oil flows out, the oil collecting groove 314 is arranged to collect the flowing lubricating oil, and the collected lubricating oil is conveyed to the lubricating oil tank 33 again through the oil pump 318, so that the recycling of the lubricating oil is realized. The check valve 316 is provided between the oil pump 318 and the lubricating oil tank 33, and prevents the lubricating oil in the lubricating oil tank 33 from flowing back into the oil sump 314. The bottom of the oil collecting tank 314 is provided with an oil return opening, the oil return pipe 315 is connected with the oil return opening, the oil return opening is provided with a first filter screen 317, and the cleanliness of the lubricating oil recovered from the oil collecting tank 314 to the lubricating oil tank 33 can be ensured by arranging the first filter screen 317. The bearing is prevented from being damaged by impurities in the lubricating oil;

cleaning fine sand and coarse sand by using a sand washer;

and (4) adopting iron removal 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 apparatus 4 includes a second elongated discharge chute 41, a flat feeding box 42 is disposed in the second elongated 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 an upper surface of the feeding box 42, an iron removing pipe 43 is disposed on the discharge holes, and a magnet 44 is disposed in the iron removing pipe 43. When the distance between the axes of two adjacent iron removing pipes 43 is s and the width of the feeding box 42 is a, s is 0.16-0.23 a. The iron removal effect of the existing iron removal equipment is poor, so that iron cannot be removed completely, and the use of subsequent equipment is influenced. This application sets up a plurality of discharge openings through the upper surface at feed box 42, set up on the discharge opening and remove iron pipe 43, set up magnet 44 in removing iron pipe 43, sand after washing sand gets into feed box 42 along with rivers along with the opening of feed box 42, then discharge through removing iron pipe 43 from each discharge opening, because be equipped with magnet 44 in removing iron pipe 43, and the flow through every the husky of removing iron pipe 43 is less, thereby can fully guarantee to flow through the deironing effect of every the husky of removing iron pipe 43, guarantee the normal use of follow-up equipment.

In this embodiment, the open end of the feeding box 42 is provided with a second filter screen 45. Through setting up second filter screen 45 can be to getting into the husky of feeding case 42 filters, avoids great impurity to get into feeding case 42 blocks up the discharge opening guarantees the normal clear of deironing.

In this embodiment, a fixing frame 46 is arranged on the feeding box 42, the middle parts of the plurality of 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, so that the stability of the fixing frame 46 is ensured.

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

In this embodiment, the feeding box 42 is disposed at the front end of the second discharging chute 41, the width of the feeding box 42 is the same as the width of the second discharging chute 41, and the sand-containing water stream after iron removal flows out from the rear end of the second discharging chute 41 to enter the next process.

The sand making method provided by the invention can obviously improve the sand making efficiency, reduce the equipment damage rate and reduce the cost.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (10)

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

separating the stones by using a vibrating screen for stone separation, and forming the separated sandy soil into silt slurry;

scattering the silt slurry by adopting a drum-type sandy soil screening device, and screening fine sand and a mixture of coarse sand and gravel;

screening the mixture by a drum-type sand screening machine, and separating coarse sand and gravel;

cleaning fine sand and coarse sand by using a sand washer;

and (4) adopting iron removal equipment to remove iron from the coarse sand and the fine sand to obtain the fine sand and the coarse sand.

2. The method for preparing sand from sandy soil as claimed in 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 spray heads are arranged above the separation net, and water outlets of the water spray heads are right aligned to the separation net.

3. The method for making sand from sandy soil according to claim 2, wherein: the water spray device comprises a water pipe and a water pump, wherein the water pump is connected with the water inlet end of the water pipe, a plurality of water spray heads are connected with the water outlet end of the water pipe, and a pressure increasing valve is arranged on the water pipe;

a plurality of mounting brackets are uniformly distributed on the first machine frame along the length direction of the separation net, and a plurality of water spraying heads are uniformly distributed on the mounting brackets.

4. A method of making sand from sandy soil according to claim 3, wherein: the separation net comprises a plurality of transverse rods which are arranged in parallel and at equal intervals and a plurality of longitudinal rods which are arranged in parallel and at equal intervals, and the plurality of transverse rods and the plurality of longitudinal rods are arranged in a staggered mode;

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

5. The method for preparing sand from sandy soil as claimed in claim 1, wherein: drum-type sandy soil screening plant includes the cylinder and the screening cylinder of breaing up of coaxial setting, just the screening cylinder sets up the discharge end of cylinder is breaed up, the screening cylinder is used for screening fine sand, and its below is equipped with first hopper that connects, the cylinder of breaing up includes cylinder body, actuating mechanism, second frame and setting supporting wheel in the second frame, the fixed cover is equipped with the swivel becket respectively at the both ends of cylinder body, just the swivel becket rotationally locates on the supporting wheel, the inner wall equipartition of gyro wheel body has a plurality of poles of breaing up, actuating mechanism is used for the drive the cylinder body rotates.

6. The sand making method using sandy soil as claimed in 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, and then a is 0.015-0.016b, and the value range of a is 8-18 cm;

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

7. The sand making method using sandy soil as claimed in 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 a screening hole of the first screen is larger than that of a screening hole of the second screen;

the cylinder body 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 preparing sand from sandy soil as claimed in claim 1, wherein: drum-type screening sand machine includes third frame, both ends open-ended cylinder, lubricating-oil tank and drive cylinder pivoted second motor, be equipped with the pivot in the cylinder, the bearing is passed through at the both ends of pivot and is connected the third frame, the lubricating-oil tank passes through defeated oil pipe and connects the bearing, the cladding has the screen cloth on the cylinder, the bottom of third frame corresponds the cylinder is equipped with the second and connects the hopper.

9. The sand making method using sandy soil as claimed in claim 8, wherein: a first bearing and a second bearing are respectively arranged at two ends of the rotating shaft, a first lubricating pipe is connected to the first bearing, a second lubricating pipe is arranged on the second bearing, and the first lubricating pipe and the second lubricating pipe are both connected with the oil conveying pipe;

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

10. The method for preparing sand from sandy soil as claimed in claim 1, wherein: the iron removing equipment comprises a strip-shaped second discharge chute, a flat feeding box is arranged in the second discharge chute, an opening at one end of the feeding box is used for feeding, a plurality of discharge holes are uniformly distributed on the upper surface of the feeding box, iron removing pipes are arranged on the discharge holes, and magnets are arranged in the iron removing pipes;

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

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