CN202061814U - Combined split sand selecting machine - Google Patents

Abstract

The utility model relates to a composite split type sand separator for sand separation in civil engineering, which relates to the technical field of building materials. It consists of two parts: a centrifugal sand separator and an air selection sand separator; the centrifugal sand separator includes a motor (1), a feeding device, a sorting device, a collection device and a finished product conveying device; the feeding device and the motor are installed (1) The sorting device is connected, the collecting device is connected with the lower part of the sorting device, and the finished product conveying device is connected with the collecting device; the winnowing type sand separator is composed of three parts: fan, air duct and sorting chamber; The air duct leads into the sorting room. The split type sand separator provided by the utility model realizes the separation of coarse and fine sand, has a high degree of automation, saves time and labor, has a simple structure, is durable, is easy to repair, has a large processing capacity, fine sorting, and high sorting efficiency.

Description

Composite Split Type Sand Separator

technical field

The utility model relates to a composite split type sand separator for sand separation in civil engineering, which relates to the technical field of building materials. the

Background technique

Sand is an important engineering material in construction engineering. In recent years, due to the rapid development of my country's basic construction projects, the qualified sand sources used in civil construction projects have been gradually exhausted. The sand quality of the existing sand sources is poor, especially the particle gradation is not good, and there are many fine particles and coarse particles. There are few particles, it is difficult to meet the requirements of engineering use, and further screening is required. the

In recent years, rich oil resources have been explored in many desert regions in my country and the world. Petroleum development is inseparable from infrastructure, and infrastructure is inseparable from concrete. Due to the special conditions of the desert, the stones used for concrete can only be transported from outside the desert at present, and the huge transportation cost has greatly increased the cost of concrete engineering. If a kind of sand selection equipment can be produced, the sand that can meet the requirements of engineering construction can be separated from desert sand, and then the qualified sand can be used to manufacture concrete stones, which can greatly reduce the construction cost and bring huge benefits. economic benefits. the

At present, sand used in engineering is rarely sorted, and most of them use raw sand directly. Even if a small number of projects with high requirements are used to sort sand, water washing or winnowing is generally used. Due to the limitations of sewage treatment and environmental pollution, these methods do not have the value of general application. At the same time, manual screening has the problems of low efficiency and high labor intensity, while the traditional sand sorting machine is not suitable for the problem of deserts with more fine-grained sand and less coarse-grained sand due to the angle and density of the screen surface. the

CN101722151A discloses a centrifugal sand particle separation device and its implementation method. The centrifugal separation method is to use the centrifugal separation device to uniformly disperse the sand material to be selected from the feeding device to the primary separation device, and then use the secondary separation device to The centrifugal method throws it into the product collector in an umbrella shape, and the sand material to be selected is separated by the collector. But the method and device can only sort roughly, with poor fineness and low efficiency. the

Utility model content

The purpose of this utility model is to design a composite split sand separator with high degree of automation in sand sorting in civil engineering, simple structure, durable, large processing capacity, fine sorting, and high sorting efficiency. the

This sand selection machine is composed of centrifugal sand selection machine and wind selection sand selection machine. the

The composition of the centrifugal sand separator is shown in Figure 1, which includes a motor 1, a feeding device, a sorting device, a collecting device and a finished product conveying device. The feeding device is connected with the sorting device equipped with motor 1, the collecting device is connected with the lower part of the sorting device, and the finished product conveying device is connected with the collecting device. the

As the feeding device, the lower end of the belt conveyor is placed at the sand pile, and the upper end of the belt conveyor is placed on the sorting device; The first-stage separation device for evenly dispersing the material, the second-stage separation device for throwing the uniformly dispersed sand material to the product collector in an umbrella shape in a centrifugal manner, and the support frame 9 for the overall support of the sorting device; the sorting device The lower part of the collection device is connected to the collection device; the collection device is formed by two steel truncated conical cylinder inner cylinders 7 and outer cylinders 8, and the tops of the inner cylinder 7 and the outer cylinder 8 have fine sand outlets respectively. 11 and the coarse sand discharge port 10, the inner cylinder 7 collects fine-grained sand, and the outer cylinder 8 collects coarse-grained sand, which is also the shell of the whole machine; Belt conveyor for producing coarse and fine sand in a truncated conical cylinder. the

The motor 1 is a speed-regulating motor, and the combination of the motor 1 and the governor adopts an integral type or a separate type;

The feeding device is a belt conveyor, and its size is determined according to the raw material handling capacity requirements; the lower end of the belt conveyor is placed at the sand pile, and the upper end of the belt conveyor is placed on the sorting device;

The sorting device consists of a feeding device for the sand to be selected to reach the primary separation device, a primary separation device for uniformly dispersing the sand to be selected, and a centrifugally-distributed sand for umbrella-shaped The secondary separation device projected to the product collector and the supporting frame 9 for the overall support of the sorting device are composed;

The sorting device specifically includes a material inlet 2, a bulk material range controller 3, a main shaft 4, a bulk material device 5, a feeder 6, an inner cylinder 7, an outer cylinder 8, a support frame 9, a coarse sand discharge port 10 and a fine sand discharge port 10. Sand outlet 11;

The motor 1 is located at the top of the sorting device, and the outer cylinder 8 is connected to the support frame 9; a rectangular hole is opened at the position of the material inlet 2; the upper part of the bulk material range controller 3 is connected to the top of the outer cylinder 8, and the lower part is connected to the outer cylinder 8 The side wall is connected; the upper part of the main shaft 4 is connected with the motor shaft, and the lower part is connected with the side wall of the outer cylinder 8; the primary bulk material device 5 is fixedly set outside the main shaft 4; the secondary lifting device 6 is located at the lower part of the primary bulk material device 5 and installed At the lower part of the main shaft 4, its position can be adjusted up and down along the direction of the main shaft 4; the top of the inner cylinder 7 is connected with the side wall of the outer cylinder 8 through the support frame 9; Fixed column connection; the lower part of the outer cylinder 8 has a coarse sand discharge port 10, and the lower part of the inner cylinder 7 has a fine sand discharge port 11;

Among them, the unloading device is a steel unloading cylinder;

Among them, the primary separation device is a bulk material range controller 3, the upper part of which is a steel truncated cone cylinder, and the lower part is a steel cylinder, which is used to control the range of bulk materials, so that the sand to be selected can be evenly distributed in the designated area of the secondary separation device. Position; Bulk material range controller 3 is set with a first-level bulk material device 5, the upper part of the bulk material device 5 is a steel cylinder, and the lower part is a steel truncated cone cylinder, and the bulk material range controller 3 is inner with a first-level bulk material device 5 Finally, a sand channel with a wide top and a narrow bottom is formed;

Among them, the secondary separation device is a lifter 6 connected with the main shaft 4 of the motor, which is a steel disc or a steel fan blade that can adjust the angle, and its outer diameter is larger than that of the lower opening of the primary bulk material 5. diameter, the distance between the lower edge of bulk feeder 5 and the upper surface of feeder 6 is 50-200mm; the rotation speed of main shaft 4 is 30-600 rpm; device;

Wherein the support frame 9 has four supporting and fixing columns, and the middle and upper parts are fixedly connected with the outer cylinder 8;

The collection device is composed of two steel truncated conical cylinder inner cylinders 7 and outer cylinders 8. The inner cylinder 7 and the lower cone top of the outer cylinder 8 respectively have a fine sand discharge port 11 and a coarse sand discharge port. Port 10, the inner cylinder 7 collects fine-grained sand, and the outer cylinder 8 collects coarse-grained sand, which is also the shell of the whole machine;

The finished product conveying device is composed of two sets of belt conveyors, which are respectively used to convey coarse and fine sand materials in different steel truncated conical cylinders. the

The steps that the realization method (see Fig. 2) that this centrifugal sand separator carries out sand particle separation include:

Motor 1 provides power for sand separation;

The loading device (belt conveyor) transports the sand to be selected to the unloading device (steel unloading barrel);

The sand to be selected enters the primary separation device from the feeding device;

The sand material enters the secondary separation device after primary separation, and the secondary separation device throws the sand material into the collector in an umbrella shape through centrifugal action;

The collector is composed of two steel truncated conical cylinders. The inner cylinder collects fine-grained sand, and the outer cylinder collects coarse-grained sand. The collected coarse sand directly enters the inlet of the winnowing type sand separator for secondary Secondary sorting or transported to the designated position by the belt conveyor, the fine material falls to the finished product conveying device (belt conveyor) through the discharge port at the bottom of the cylinder, and then transported to the designated position. the

The composition of the winnowing type sand separator is shown in Figure 3, which consists of three parts: fan, air duct and sorting chamber. The air duct connected with the fan leads into the sorting chamber. the

The winnowing type sand separator specifically includes a feed hopper 12, a sorting chamber shell 13, an air outlet 14, a collection plate I 15, a collection plate II16, a collection plate III17, a collection plate IV18, a collection plate V19, a collection plate Material board VI20, partition board I21, partition board II22, partition board III23, partition board IV24, air duct I25, fan I26, air duct II27, fan II28, coarse sand outlet II29, fine sand outlet II30. There is a feed hopper 12 on the top side of the shell 13 of the sorting chamber, the outlet of the air duct I25 connected with the blower fan I26 is placed outside the lower mouth of the feed hopper 12, and the inclined collecting plate V19 is placed under the outlet of the air duct I25. The collection plate VI20 and the collection plate V19 are installed in a funnel shape, and there is a gap between the collection plate V19 and the collection plate VI20, and there are two oblique partitions III23 on the opposite side of the collection plate V19 , Partition plate IV24; the outlet of the air duct II27 connected to the fan II28 is placed outside and below the gap between the collecting plate V19 and the collecting plate VI20, and the inclined collecting plate IV18 is against the outlet of the air duct II27. The material plate III17 and the material collecting plate IV18 are installed in a funnel shape, and there is a gap between the material collecting plate III17 and the material collecting plate IV18. It communicates with the coarse sand outlet II29. Slanted partition I21 and partition II22; the upper end of the collection board III17 is connected to the collection board II16, and the lower end of the collection board II16 and the collection board I15 are installed in a funnel shape, and the gap between them and the fine sand The discharge port II30 is connected; the coarse sand discharge port II29 and the fine sand discharge port II30 are located at the bottom of the sorting chamber shell 13, and the right side of the sorting chamber shell 13 has an air outlet 14. the

in:

The air duct I25 and the air duct II27 penetrate the sorting chamber casing 13 from bottom to top, the angle between the axes of the air duct I25 and the air duct II27 and the horizontal line is 30°-45°, and the angle between the collecting plate V19 and the collecting plate VI20 is 80°-120°, the angle between the collecting plate III17 and the collecting plate IV18 is 80°-100°, the angle between the collecting plate I15 and the collecting plate II16 is 90°-135°; the separation plate I21, The angle between partition plate II22, partition plate III23, partition plate IV24 and the horizontal line is 110°-145°; the outlet of air duct I25 is 100-200mm away from the outlet of feed hopper 12, and the distance between the outlet of air duct II27 and the outlet of collecting plate V19 and The gap between the collecting plate VI20 is 100-200mm; the upper end of the collecting plate I15 is located at the lower edge of the air outlet 14;

Fan I26 and fan II28 are centrifugal fans;

Air duct I25 and air duct II27 are made of galvanized iron sheet, and the air outlet is a rectangular section with the same width as the sorting chamber; 

The sorting chamber shell 13 is a rectangular box;

The feeding hopper 12 is a strip bucket; the coarse sand discharge port II29 and the fine sand discharge port II30 are strip holes;

Collection board I15, collection board II16, collection board III17, collection board IV18, collection board V19, collection board VI20, partition board I21, partition board II22, partition board III23, partition board IV24 It is a rectangular plate, and the two ends of the plate are connected with the box bodies on both sides of the shell 13 of the sorting chamber. the

As can be seen from Figure 4, the feed hopper 12 is located at the top of the winnowing chamber. After the sand to be selected flows out through the feed hopper 12, it is scattered under the wind force provided by the fan I26. The smaller particles have a larger scattering distance and pass through the separation plate III23 and partition plate IV24 enter the fine material collection area, and coarser particles enter the lower hopper formed by the material collecting plate V19 and material collecting plate VI20. Under the action of the wind force provided by the fan II28, the coarser sand flowing out from the lower hopper formed by the collecting plate V19 and VI20 is further dispersed, and the finer particles enter the aggregate through the dividing plate I21 and dividing plate II22 The fine material collection area of the lower hopper formed by the plate I15 and the collecting plate II16 enters the fine sand discharge port II30, and the coarser particles enter the coarse material discharge port 29 under the action of the collecting plate III17 and the collecting plate IV18. the

The application field of the split type sand separator provided by the utility model is sand screening in civil construction engineering, and the range of sand to be selected includes river sand, sea sand, artificial sand and desert sand. the

The utility model can be used alone or in combination. Centrifugal sand separator is a kind of equipment using centrifugal principle. Under the action of centrifugal force, the coarse sand is thrown far away, and the fine sand is thrown relatively short, so as to realize the separation of coarse and fine sand. The air separation type sand separator is a kind of equipment that uses the principle of wind blowing. Under the action of wind, the distance of coarse sand is blown out is relatively short, and the distance of fine sand is relatively far, so as to realize the separation of coarse and fine sand. The centrifugal sand separator is the main machine, if the separation effect cannot meet the ideal requirements, the air separation sand separator can be used as the secondary separation equipment. the

The split type sand separator provided by the utility model realizes the separation of coarse and fine sand, has high degree of automation, saves time and effort, simple structure, durable, easy to repair, large processing capacity, fine sorting, and high sorting efficiency. the

Description of drawings

Figure 1 Schematic diagram of the overall structure of the centrifugal sand separator

Figure 2 Schematic diagram of the working principle of the centrifugal sand separator

Figure 3 Schematic diagram of the overall structure of the winnowing type sand separator

Figure 4 Schematic diagram of the working principle of the winnowing type sand separator

Among them: 1-motor         2- material inlet

                                                                   

5-Bulk feeder 6-Lifter

  7-Inner cylinder   8-Outer cylinder

9-Support frame 10-Coarse sand outlet I

                                                                                         

                                                                           

                                                                                                                 

                                                                                     

                                                                                                   

                                                                                                                 

                                                                               

                                                                                                       

                                                                                 

     29-Coarse sand outlet II 30-Fine sand outlet II

Detailed ways

Embodiment. This example is an experimental prototype, and its composition is shown in Fig. 1 and Fig. 3 . the

This example consists of two parts: a centrifugal sand separator and an air selection sand separator. the

The centrifugal sand separator includes a motor 1, a feeding device, a sorting device, a collecting device and a finished product conveying device. The feeding device is connected with the sorting device equipped with motor 1, the collecting device is connected with the lower part of the sorting device, and the finished product conveying device is connected with the collecting device. the

The motor 1 is a speed-regulating motor, and the combination of the motor 1 and the governor adopts a separate type; the model of the motor 1 is ILGO (5-20kw; the model of the governor is 6SE6440 (15-22kw; the spindle speed is 30-600 rpm /minute.

The feeding device is a belt conveyor, and the belt size is: width 600mm, thickness 10mm;

The sorting device specifically includes a material inlet 2, a bulk material range controller 3, a main shaft 4, a bulk material device 5, a feeder 6, an inner cylinder 7, an outer cylinder 8, a support frame 9, a coarse sand discharge port 10 and a fine sand discharge port 10. Sand outlet 11;

The motor 1 is located at the top of the sorting device, and the outer cylinder 8 is connected to the support frame 9; a rectangular hole is opened at the position of the material inlet 2; the upper part of the bulk material range controller 3 is connected to the top of the outer cylinder 8, and the lower part is connected to the outer cylinder 8 The side wall is connected; the upper part of the main shaft 4 is connected with the motor shaft, and the lower part is connected with the side wall of the outer cylinder 8; the primary bulk material device is fixedly installed on the main shaft 4; the secondary lifting device 6 is located at the lower part of the primary bulk material device and is also installed on On the main shaft 4, its position can be adjusted up and down along the direction of the main shaft 4; the top of the inner cylinder 7 is connected with the side wall of the outer cylinder 8 through the support frame 9; Column connection; the lower part of the outer cylinder 8 has a coarse sand discharge port 10, and the lower part of the inner cylinder 7 has a fine sand discharge port 11;

Among them, the unloading device is a steel unloading cylinder;

Among them, the bulk material range controller 3, which consists of a steel cylinder and a steel truncated cone tube, is used to control the bulk material range, so that the sand to be selected can be evenly distributed in the designated position of the secondary separation device;

Wherein the lifter 6 connected with the main shaft 4 of the motor is larger than the first-stage bulk feeder and is a steel disc;

Among them, the support frame 9 has four supporting and fixing columns, and the middle and upper parts are fixedly connected with the outer cylinder 8; the fixing columns are 100×100×1000mm;

The collection device is composed of two steel truncated conical cylinder inner cylinders 7 and outer cylinders 8. The inner cylinder 7 and the lower cone top of the outer cylinder 8 respectively have a fine sand discharge port 11 and a coarse sand discharge port. Port 10; the size of the inner cylinder 7 is Φ800×800mm, and the size of the outer cylinder 8 is Φ1000×1000mm;

The finished product conveying device is composed of two sets of belt conveyors, and the belt width is 600mm and the thickness is 10mm.

The motor 1 is a speed-regulating motor with a power of 5-20 kilowatts. The combination of the motor and the governor adopts a separate type, and the working speed is 30 rpm to 600 rpm;

The composition of the winnowing type sand separator is shown in Figure 3, which consists of three parts: fan, air duct and sorting chamber. The air duct connected with the fan leads into the sorting chamber. the

The winnowing type sand separator specifically includes the feed hopper 12, the shell of the sorting chamber 13, the air outlet 14, the collecting plate I15, the collecting plate II16, the collecting plate III17, the collecting plate IV18, the collecting plate V19, the collecting plate Plate VI20, partition I21, partition II22, partition III23, partition IV24, air duct I25, fan I26, air duct II27, fan II28, coarse sand outlet II29, fine sand outlet II30 . There is a feed hopper 12 on the top side of the shell 13 of the sorting chamber, the outlet of the air duct I25 connected with the blower fan I26 is placed outside the lower mouth of the feed hopper 12, and the inclined collecting plate V19 is placed under the outlet of the air duct I25. The collection plate VI20 and the collection plate V19 are installed in a funnel shape, and there is a gap between the collection plate V19 and the collection plate VI20, and there are two oblique partitions III23 on the opposite side of the collection plate V19 , Partition plate IV24; the outlet of the air duct II27 connected to the fan II28 is placed outside and below the gap between the collecting plate V19 and the collecting plate VI20, and the inclined collecting plate IV18 is against the outlet of the air duct II27. The material plate III17 and the material collecting plate IV18 are installed in a funnel shape, and there is a gap between the material collecting plate III17 and the material collecting plate IV18, which communicates with the coarse sand outlet II29, and there are two upper and lower sides of the material collecting plate IV18. Slanted partition I21 and partition II22; the upper end of the collection board III17 is connected to the collection board II16, and the lower end of the collection board II16 and the collection board I15 are installed in a funnel shape, and the gap between them and the fine sand The discharge port II30 is connected; the coarse sand discharge port II29 and the fine sand discharge port II30 are located at the bottom of the sorting chamber shell 13, and the right side of the sorting chamber shell 13 has an air outlet 14. the

in:

The air duct I25 and the air duct II27 penetrate the sorting chamber shell 13 from bottom to top, the angle between the axes of the air duct I25 and the air duct II27 and the horizontal line is 35°, and the angle between the collecting plate V19 and the collecting plate VI20 is 95° , the angle between collecting plate III17 and collecting plate IV18 is 80°, the angle between collecting plate I15 and collecting plate II16 is 130°; separating plate I21, separating plate II22, separating plate III23, separating The included angle between plate IV24 and the horizontal line is 135°; the outlet of air duct I25 is 150mm away from the outlet of feed hopper 12, and the outlet of air duct II27 is 150mm away from the gap between collecting plate V19 and collecting plate VI20;

The upper end of the collecting plate I15 is located at the lower edge of the air outlet 14;

Fan I26 and fan II28 are centrifugal fans with a power of 0.5-1.5 kilowatts;

The air duct I25 and the air duct II27 are made of galvanized iron sheet, and the air outlet is a rectangular section with a size of 2000×50mm;

The shell 13 of the sorting chamber is a 4mm thick ordinary steel plate rectangular box with a size of 2000×2000×2000mm;

The feeding hopper 12 is a strip-shaped bucket with a size of 2000×50mm; the coarse sand discharge port II29 and the fine sand discharge port II30 are strip-shaped holes with a size of 2000×50mm;

Collection board I15, collection board II16, collection board III17, collection board IV18, collection board V19, collection board VI20, partition board I21, partition board II22, partition board III23, partition board IV24 It is a 4mm thick rectangular steel plate, and the two ends of the plate are connected with the boxes on both sides of the shell 13 of the sorting chamber. The size of the collecting plate I15 is 2000×600mm; The size of IV18 is 2000×600mm; the size of collecting plate V19 is 2000×550mm; the size of collecting plate VI20 is 2000×300mm; the size of partition I21, partition II22, partition III23 and partition IV24 is 2000× 300mm;

The feed hopper 12 is located at the top of the air selection chamber. After the sand to be selected flows out through the feed hopper 12, it is scattered under the action of the wind force provided by the fan I26. The smaller particles have a larger scattering distance and enter through the partition III23 and IV24. In the fine material collection area, the coarser particles enter the lower hopper formed by the collecting plate V19 and the collecting plate VI20. Under the action of the wind force provided by the fan II28, the coarser sand flowing out from the lower hopper formed by the collecting plate V19 and VI20 is further dispersed, and the finer particles enter the aggregate through the dividing plate I21 and dividing plate II22 The fine material collection area of the lower hopper formed by the plate I15 and the collecting plate II16 enters the fine sand discharge port II30, and the coarser particles enter the coarse material discharge port 29 under the action of the collecting plate III17 and the collecting plate IV18. the

The centrifugal sand separation device is mainly used to separate sand particles larger and smaller than a certain control particle size to meet engineering application requirements. The processing capacity of the sand material to be selected depends on the power and speed of the motor used. The larger the motor power and the higher the speed, the greater the output. When the motor power is above 10 kW and the hourly throughput is above 30 tons, the separation efficiency is above 80%. the

This split type sand separator has a high degree of automation, saves time and effort, has a simple structure, is durable, is easy to repair, has a large processing capacity, and is finely sorted. And sand less than 0.15mm, the sorting efficiency can reach more than 70%. the

Claims (13)

1. A compound split type sand separator is characterized in that it is made up of centrifugal type sand separator and winnowing type sand separator; Centrifugal sand separator comprises motor (1), feeding device, sorting device, The collecting device and the finished product conveying device; the feeding device is connected with the sorting device installed with the motor (1), the collecting device is connected with the lower part of the sorting device, and the finished product conveying device is connected with the collecting device; the winnowing type sand separator is composed of a fan, The air duct and the sorting room are composed of three parts; the air duct connected with the fan leads into the sorting room. 2. The composite split type sand separator according to claim 1, characterized in that the centrifugal sand separator is placed at the sand pile at the lower end of the belt conveyor as the feeding device, and the upper end of the belt conveyor is placed on the sorting device Above; the sorting device is composed of the unloading device for the sand to be selected to reach the primary separation device, the primary separation device for uniform dispersion of the sand to be selected, and the umbrella-shaped ejection of the uniformly dispersed sand in a centrifugal manner The secondary separation device to the product collector and the supporting frame (9) used for the overall support of the sorting device are composed; the lower part of the sorting device is connected to the collecting device; the collecting device is composed of two steel truncated conical cylinders The cylinder (7) and the outer cylinder (8) are nested together, and the lower cone tops of the inner cylinder (7) and the outer cylinder (8) respectively have a fine sand discharge port (11) and a coarse sand discharge port (10). The inner cylinder (7) collects fine-grained sand, and the outer cylinder (8) collects coarse-grained sand, which is also the shell of the whole machine; the lower part of the collection device is connected to two sets of finished product delivery devices to convey different steel truncated conical cylinders Belt conveyor for coarse and fine sand materials in the body. 3. The composite split type sand separator according to claim 1 or 2, characterized in that the sorting device includes a material inlet (2), a bulk material range controller (3), a main shaft (4), a bulk material device (5), lifter (6), inner cylinder (7), outer cylinder (8), support frame (9), coarse sand discharge port (10) and fine sand discharge port (11); The motor (1) is located at the uppermost part of the sorting device, and the outer cylinder (8) is connected to the support frame (9); a rectangular hole is opened at the position of the material inlet (2); the upper part of the bulk material range controller (3) is connected to the outer The top of the cylinder (8) is connected, and the lower part is connected with the side wall of the outer cylinder (8); the upper part of the main shaft (4) is connected with the motor shaft, and the lower part is connected with the side wall of the outer cylinder (8); Outside the main shaft (4); the secondary lifter (6) is located at the lower part of the first bulk material device (5), installed on the lower part of the main shaft (4), and its position can be adjusted up and down along the direction of the main shaft (4); the inner cylinder (7) The top is connected with the side wall of the outer cylinder (8) through the support frame (9); the top of the outer cylinder (8) and the middle part of the tapered cylinder body are connected with the four supporting and fixing columns of the support frame (9); the lower part of the outer cylinder (8) A coarse sand discharge port (10) is arranged, and a fine sand discharge port (11) is arranged at the bottom of the inner cylinder (7). 4. The composite split type sand separator according to claim 1, characterized in that the motor (1) is a speed-regulating motor, and the combination of the motor (1) and the speed controller adopts an integral type or a separate type. 5. The composite split type sand separator according to claim 2, characterized in that the primary separation device is a bulk material range controller (3), the upper part of which is a steel truncated cone cylinder, and the lower part is a steel cylinder ; The bulk material range controller (3) is covered with a primary bulk material device (5), the upper part of the bulk material device (5) is a steel cylinder, and the lower part is a steel truncated cone cylinder, and the bulk material range controller (3) is A sand material channel with a wide top and a narrow bottom is formed after the first-level bulk material device (5) is covered. 6. The composite split type sand separator according to claim 2, characterized in that the secondary separation device is a lifter (6) connected to the main shaft (4) of the motor, which is a steel disc or The steel fan blade that can adjust the angle has an outer diameter larger than the outer diameter of the lower opening of the primary bulk feeder (5), and the distance between the lower edge of the bulk feeder (5) and the upper surface of the lifter (6) is 50- 200mm; the rotating speed of the main shaft (4) is 30-600 rev/min. 7. The composite split type sand separator according to claim 1, characterized in that the air selection type sand separator specifically comprises a feed hopper (12), a sorting chamber shell (13), an air outlet (14), Collecting plate I (15), collecting plate II (16), collecting plate III (17), collecting plate IV (18), collecting plate V (19), collecting plate VI (20), partition Plate I (21), dividing plate II (22), dividing plate III (23), dividing plate IV (24), air duct I (25), fan I (26), air duct II (27), Fan II (28), coarse sand discharge port II (29), fine sand discharge port II (30); there is a feed hopper (12) on the top side of the sorting chamber shell (13), and the fan I ( 26) The outlet of the connected air duct I (25) is placed outside the lower mouth of the feed hopper (12), the inclined collecting plate V (19) is under the outlet of the air duct I (25), and the collecting plate VI (20 ) and the collecting plate V (19) are installed in a funnel shape, and there is a gap between the collecting plate V (19) and the collecting plate VI (20). Two oblique partitions III (23) and IV (24); the outlet of the air duct II (27) connected to the fan II (28) is placed on the collection plate V (19) and the collection plate Below the gap between Ⅵ (20), the inclined collecting plate IV (18) is under the outlet of the air duct II (27), and the collecting plate III (17) and the collecting plate IV (18) form a funnel shape Installation, and there is a gap between the collecting plate III (17) and the collecting plate IV (18) to communicate with the coarse sand discharge port II (29), and there are two upper and lower sides of the collecting plate IV (18) opposite to each other. Separation plate I (21) and separation plate II (22) with inclined strips; the upper end of the collection plate III (17) is connected with the collection plate II (16), and the lower end of the collection plate II (16) is connected with the The collecting plate I (15) is installed in a funnel shape, and the gap between them communicates with the fine sand discharge port II (30); the coarse sand discharge port II (29) and the fine sand discharge port II (30) are located in the separation The bottom of the chamber shell (13) has an air outlet (14) on the right side of the sorting chamber shell (13). 8. The composite split type sand separator according to claim 7, characterized in that the air duct I (25) and the air duct II (27) penetrate the sorting chamber shell (13) from bottom to top, and the air duct I (25) ) and the axis of the air duct II (27) and the horizontal line have an angle of 30°-45°, the angle between the collecting plate V (19) and the collecting plate VI (20) is 80°-120°, and the collecting plate III (17) is 80°-100° with the angle of collecting plate IV (18), and the angle between collecting plate I (15) and collecting plate II (16) is 90°-135°; (21), the included angle of dividing plate II (22), dividing plate III (23), dividing plate IV (24) and horizontal line is 110 °-145 °; Air duct I (25) outlet is apart from feed hopper (12) The outlet is 100-200mm, and the outlet of the air duct II (27) is 100-200mm away from the gap between the collecting plate V (19) and the collecting plate VI (20); the upper end of the collecting plate I (15) is located at the air outlet (14 ) of the lower edge. 9. The composite split type sand separator according to claim 7, characterized in that said fan I (26) and fan II (28) are centrifugal fans. 10. The composite split type sand separator according to claim 7, characterized in that said air duct I (25) and air duct II (27) are made of galvanized iron sheet, and the air outlet is a rectangular section, the width of which is the same as that of the sorting chamber same. 11. The compound split type sand separator according to claim 7, characterized in that the shell (13) of the sorting chamber is a rectangular box. 12. The compound split type sand separator according to claim 7, characterized in that the feed hopper (12) is a strip bucket; the coarse sand discharge port II (29), the fine sand discharge port II (30 ) is a strip hole. 13. The compound split type sand separator according to claim 7, characterized in that said collecting plate I (15), collecting plate II (16), collecting plate III (17), collecting plate IV ( 18), collecting plate V (19), collecting plate VI (20), separating plate I (21), separating plate II (22), separating plate III (23), separating plate IV (24) All are rectangular plates, and the two ends of the plates are connected with the box bodies on both sides of the sorting chamber shell (13). the

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