Semi-countercurrent river sand magnetic separator

Abstract

The utility model discloses a semi-countercurrent river sand magnetic separator, and relates to the technical field of magnetic separators. The device comprises a fixing frame, a large transmission wheel and a collecting hopper, the top end of the fixing frame is connected with a second driving source, and the power output end of the second driving source is in power connection with a small transmission wheel. According to the river sand scattering device, the driving gear is meshed with the two driven gears, so that stirring blades are conveniently driven to rotate to scatter river sand, caking is avoided as much as possible, and spiral blades are driven by a fifth driving source to rotate, so that the scattered river sand is conveniently conveyed to a main transmission belt and a first transmission belt; secondary magnetic separation is carried out through the magnetic separation modules on the first transmission belt, the magnetic separation effect is improved, that is, the magnetic separation modules on the main transmission belt and the first transmission belt are matched to facilitate two-time magnetic separation of river sand, and therefore the situation that the magnetic separation effect is affected due to omission of preliminary magnetic separation is avoided; the interior of the collecting hopper can be conveniently washed through clean water by opening the sealing cover, and dirt is discharged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of magnetic separator, concretely, especially relates to a half counterflow river sand magnetic separator. BACKGROUND

[0002] The magnetic separator is a screening device for removing iron powder in recycling powder particles. After the half counterflow river sand flows into the tank, the ore particles enter the ore feeding area of the tank in a loose state under the action of the water flow of the ore feeding water spray pipe. Under the action of the magnetic field, the magnetic ore particles form "magnetic groups" or "magnetic chains" through magnetic aggregation. The "magnetic groups" or "magnetic chains" move towards the magnetic pole under the action of the magnetic force in the ore slurry and are adsorbed on the cylinder.

[0003] The Chinese patent CN202321099061.9 discloses a magnetic separator, which is provided with a magnetic separation part and a fine selection part. The magnetic separation part includes a magnetic separation shell, and a magnetic selection assembly is arranged in the magnetic separation shell. The magnetic selection assembly includes a first motor, and the output end of the first motor is connected with a roller. A first magnet is arranged in the roller, and the roller is rotatable relative to the first magnet. A feeding port and a discharging port are connected to the magnetic separation shell. A first spray head is connected to the feeding port. A discharging assembly is further connected to the magnetic separation shell. The fine selection part includes a first support, and a fine selection shell is connected to the first support. A second magnet is arranged in the fine selection shell. A second motor is connected to the fine selection shell, and the output end of the second motor is connected with the second magnet. The second magnet is rotatable relative to the fine selection shell. An insulating layer is connected to the inner wall of the upper end of the fine selection shell.

[0004] Most of the current magnetic separators only perform one-step magnetic separation on river sand, which can also be understood as preliminary magnetic separation. However, there is a lack of secondary magnetic separation. Therefore, if preliminary magnetic separation is performed, there are still magnetic ores in the river sand after magnetic separation, and secondary magnetic separation is still required. Moreover, the river sand needs to be collected and put into the ore feeding area of the tank repeatedly, which is not only time-consuming but also labor-intensive.

[0005] However, there is no effective solution to the above problems in the related art. UTILITY MODEL CONTENTS

[0006] In view of the problems in the related art, the utility model provides a half counterflow river sand magnetic separator to overcome the above technical problems in the prior art.

[0007] To solve the above technical problems, the utility model is implemented by the following technical scheme:

[0008] The utility model discloses a half counterflow river sand magnetic separator, which comprises a fixing frame, a large transmission wheel and a collecting hopper. The top end of the fixing frame is connected with a second driving source. The power output end of the second driving source is connected with a small transmission wheel. The surface of the small transmission wheel is connected with a small transmission belt. The large transmission wheel is connected with the small transmission wheel through the small transmission belt.

[0009] The power output end of the large transmission wheel is connected with the main transmission belt through two transmission wheels, the surface of the fixed frame is connected with two magnetic separation modules, the surface of the fixed frame is connected with a third driving source, the power output end of the third driving source is connected with the first transmission belt through two transmission wheels, the surface of the fixed frame is connected with a fourth driving source, the power output end of the fourth driving source is connected with the second transmission belt through two transmission wheels, the collecting hopper is located on one side of the fixed frame, the collecting hopper is respectively provided with a stirring assembly and a circulating assembly, and the surface of the fixed frame is connected with a connecting plate.

[0010] The surface of the stirring assembly is connected with the surface of the collecting hopper, so as to stir the river sand to avoid caking.

[0011] The surface of the circulating assembly is connected with the surface of the collecting hopper, so as to convey the river sand.

[0012] Further, the stirring assembly comprises a first driving source, two supporting rods and two driven gears, the first driving source is arranged on one side of the collecting hopper, the power output end of the first driving source is connected with a driving gear, two supporting rods are rotatably arranged on one side of the collecting hopper, two driven gears are arranged at one end of the two supporting rods respectively, the two driven gears are connected with the driving gear in meshing connection, one side of the driving gear and one side of the two driven gears are connected with stirring rods, and the surfaces of the three stirring rods are connected with a plurality of stirring blades.

[0013] Further, the surface of each stirring rod is rotatably connected with the inside of one side of the collecting hopper, and one end of each stirring rod is rotatably connected with the inner wall of the other side of the collecting hopper through a bearing.

[0014] Further, the circulating assembly comprises a feeding hopper, a fifth driving source and a discharge pipe, the feeding hopper is arranged at the bottom end of the collecting hopper, the fifth driving source is arranged at the bottom end of the collecting hopper, the power output end of the fifth driving source is connected with a spiral blade, the discharge pipe is arranged on the surface of the feeding hopper, and the bottom end of the feeding hopper is clampedly connected with a sealing cover.

[0015] Further, the top end inside of the feeding hopper is in communication with the bottom end of the collecting hopper.

[0016] Further, the top end of the spiral blade is rotatably connected with the top end inside of the feeding hopper, and the discharge pipe is located above the main transmission belt.

[0017] Further, the bottom end of one of the magnetic separation modules is matched with the bottom end inside of the main transmission belt, and the top end of the other magnetic separation module is matched with the top end inside of the first transmission belt.

[0018] Furthermore, a protective shell is connected to the surface of the fixed frame, and one side of the small transmission wheel and the other side of the large transmission wheel are rotatably connected to the inner wall of one side of the protective shell through bearings.

[0019] Furthermore, the second transmission belt is located above the hopper.

[0020] Furthermore, the surface of the connecting plate is in contact with both the surface of the first transmission belt and the surface of the second transmission belt.

[0021] This utility model has the following beneficial effects:

[0022] This invention utilizes a drive gear and two driven gears to mesh and rotate the mixing blades, thus breaking up the river sand and minimizing clumping. A fifth drive source drives the spiral blades to rotate, facilitating the transport of the broken river sand to the main drive belt and the first drive belt. A secondary magnetic separation is performed by a magnetic separation module on the first drive belt, improving the separation effect. In other words, the cooperation between the magnetic separation modules on the main drive belt and the first drive belt allows for two magnetic separations of the river sand, preventing omissions in the initial magnetic separation that could affect the separation effect. Furthermore, opening the sealing cover allows for rinsing the inside of the collection hopper with clean water to remove dirt.

[0023] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a top view of the structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the front planar structure of the present invention;

[0028] Figure 4 This is a partial cross-sectional structural diagram of the present invention;

[0029] Figure 5 This utility model Figure 4 A magnified structural diagram at point A;

[0030] Figure 6 It is the partial view structure schematic diagram of the utility model.

[0031] In the drawings, the component list represented by each sign is as follows:

[0032] 1, fixed frame; 2, stirring assembly; 21, first driving source; 22, driving gear; 23, support rod; 24, driven gear; 25, stirring rod; 26, stirring blade; 3, second driving source; 4, small transmission wheel; 5, large transmission wheel; 6, small transmission belt; 7, main transmission belt; 8, magnetic separation module; 9, protective shell; 10, third driving source; 11, first transmission belt; 12, fourth driving source; 13, second transmission belt; 14, material collecting hopper; 15, circulating assembly; 1501, feeding hopper; 1502, fifth driving source; 1503, spiral blade; 1504, discharge pipe; 1505, sealing cover; 16, connecting plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model protection.

[0034] In the description of the utility model, it is understood that the terms "opening", "upper", "lower", "top", "middle", "inner" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated components or elements must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model.

[0035] Please refer to Figures 1-6 The utility model discloses a kind of semi-counterflow river sand magnetic separators, including fixed frame 1, large transmission wheel 5 and material collecting hopper 14, the top of the fixed frame 1 is connected with second driving source 3, the power output end of the second driving source 3 is connected with small transmission wheel 4 by power, the surface of the small transmission wheel 4 is connected with small transmission belt 6 by transmission, the large transmission wheel 5 is connected with the small transmission wheel 4 by transmission by the small transmission belt 6:

[0036] The power output end of the large transmission wheel 5 is connected with the main transmission belt 7 through two transmission wheels, the surface of the fixed frame 1 is connected with two magnetic separation modules 8, the surface of the fixed frame 1 is connected with the third driving source 10, the power output end of the third driving source 10 is connected with the first transmission belt 11 through two transmission wheels, the surface of the fixed frame 1 is connected with the fourth driving source 12, the power output end of the fourth driving source 12 is connected with the second transmission belt 13 through two transmission wheels, the collecting hopper 14 is located on one side of the fixed frame 1, the collecting hopper 14 is respectively provided with the stirring assembly 2 and the circulating assembly 15, and the surface of the fixed frame 1 is connected with the connecting plate 16.

[0037] The surface of the stirring assembly 2 is connected with the surface of the collecting hopper 14, so that the river sand is stirred to avoid caking.

[0038] The surface of the circulating assembly 15 is connected with the surface of the collecting hopper 14, so that the river sand is conveyed.

[0039] Firstly, the small transmission wheel 4, the large transmission wheel 5 and the small transmission belt 6 are driven to rotate by the second driving source 3, then the main transmission belt 7 is driven to operate by the large transmission wheel 5, and the third driving source 10 and the fourth driving source 12 are started, respectively driving the first transmission belt 11 and the second transmission belt 13 to transmit, wherein the transmission direction of the second transmission belt 13 is counterclockwise, the transmission direction of the first transmission belt 11 is clockwise, and the transmission direction of the main transmission belt 7 can be adjusted clockwise or counterclockwise as needed, then the river sand to be magnetically separated is flowed onto the connecting plate 16, at this time the transmission direction of the first transmission belt 11 is clockwise, and the transmission direction of the main transmission belt 7 is counterclockwise, under the action of the earth's gravity, the river sand will gradually fall on the surface of the second transmission belt 13 from the inclined connecting plate 16, in the process of conveying the river sand to the right by the second transmission belt 13, the magnetic particles in the river sand will be first magnetically attracted by the magnetic separation module 8 on the main transmission belt 7, then the counterclockwise transmission of the main transmission belt 7 will make the magnetic particles fall on the first transmission belt 11 which is clockwise transmission when the magnetic attraction of the magnetic separation module 8 on the main transmission belt 7 is lost, continue to be magnetically attracted by the magnetic separation module 8 on the first transmission belt 11 and fall into the external collection bucket, which is the preliminary magnetic separation, and the river sand on the second transmission belt 13 will gradually fall into the collecting hopper 14, after a batch of river sand falls into the collecting hopper 14 and the magnetic particles are conveyed to the external collection bucket by the first transmission belt 11, the external supply of this batch of river sand is stopped and the transmission direction of the main transmission belt 7 is adjusted to clockwise, then the river sand is dispersed by the rotation of the stirring assembly 2, so as to avoid the situation of clumping, and the dispersed river sand will enter the circulating assembly 15, the river sand is conveyed to the upper surface of the main transmission belt 7 by the circulating assembly 15, the main transmission belt 7 will convey the river sand to the upper surface of the first transmission belt 11, and the second magnetic separation is carried out by the magnetic separation module 8 on the first transmission belt 11 to improve the magnetic separation effect, that is, the initial position of the river sand is on the second transmission belt 13 for preliminary magnetic separation and conveying, and the final position after magnetic separation is at the top of the first transmission belt 11 which is conveyed to the left, so the river sand is magnetically separated twice to avoid affecting the magnetic separation effect due to clumping.

[0040] The river sand is dispersed by the rotation of the stirring assembly 2 to avoid clumping as much as possible, the dispersed river sand is conveyed to the main transmission belt 7 and the first transmission belt 11 by the circulating assembly 15, the second magnetic separation is carried out by the magnetic separation module 8 on the first transmission belt 11 to improve the magnetic separation effect, that is, the river sand is magnetically separated twice by the cooperation of the magnetic separation modules 8 on the main transmission belt 7 and the first transmission belt 11, so as to avoid the situation that the preliminary magnetic separation affects the magnetic separation effect due to omission.

[0041] In one embodiment, for the stirring assembly 2 described above, the stirring assembly 2 comprises a first driving source 21, two supporting rods 23 and two driven gears 24, the first driving source 21 is arranged on one side of the collecting hopper 14, the power output end of the first driving source 21 is connected with a driving gear 22, the two supporting rods 23 are both rotationally arranged on one side of the collecting hopper 14, the two driven gears 24 are respectively arranged on one end of the two supporting rods 23, the two driven gears 24 are both meshingly connected with the driving gear 22, one side of the driving gear 22 and one side of the two driven gears 24 are both connected with stirring rods 25, and the surfaces of the three stirring rods 25 are all connected with a plurality of stirring blades 26.

[0042] Firstly, the small transmission wheel 4, the large transmission wheel 5 and the small transmission belt 6 are driven to rotate by the second driving source 3, then the main transmission belt 7 is driven to operate by the large transmission wheel 5, and the third driving source 10 and the fourth driving source 12 are started, respectively driving the first transmission belt 11 and the second transmission belt 13 to transmit, wherein the transmission direction of the second transmission belt 13 is counterclockwise, the transmission direction of the first transmission belt 11 is clockwise, and the transmission direction of the main transmission belt 7 can be adjusted clockwise or counterclockwise as needed, then the river sand to be magnetically separated is flowed onto the connecting plate 16, at this time the transmission direction of the first transmission belt 11 is clockwise, and the transmission direction of the main transmission belt 7 is counterclockwise, under the action of the earth's gravity, the river sand will gradually fall on the surface of the second transmission belt 13 from the inclined connecting plate 16, and in the process of transmitting the river sand to the right by the second transmission belt 13, the magnetic particles in the river sand will be first magnetically attracted by the magnetic separation module 8 on the main transmission belt 7, then the counterclockwise transmission of the main transmission belt 7 will make the magnetic particles fall on the first transmission belt 11 which is clockwise transmission when losing the magnetic attraction of the magnetic separation module 8 on the main transmission belt 7, continue to be magnetically attracted by the magnetic separation module 8 on the first transmission belt 11 and fall into the external collection bucket, which is the preliminary magnetic separation, and the river sand on the second transmission belt 13 will gradually fall into the collecting hopper 14, after a batch of river sand falls into the collecting hopper 14 and the magnetic particles are transmitted to the external collection bucket by the first transmission belt 11, the external stops feeding this batch, and the transmission direction of the main transmission belt 7 is adjusted to clockwise, then the driving gear 22 is driven to rotate by the first driving source 21, thereby driving the two driven gears 24 connected with it to rotate, and then the river sand is dispersed by the stirring blades 26, thereby avoiding the occurrence of clumping, and the dispersed river sand enters the circulating assembly 15, the river sand is transmitted to the upper surface of the main transmission belt 7 by the circulating assembly 15, the main transmission belt 7 transmits the river sand to the upper surface of the first transmission belt 11, and the second magnetic separation is performed by the magnetic separation module 8 on the first transmission belt 11 to improve the magnetic separation effect, that is, the initial position of the river sand is on the second transmission belt 13 for preliminary magnetic separation and transmission, and the final position after magnetic separation is at the top of the first transmission belt 11 and is transmitted to the left, so the river sand is magnetically separated twice in a loop to avoid affecting the magnetic separation effect due to clumping.

[0043] The driving gear 22 and the two driven gears 24 are engaged to drive the stirring blades 26 to rotate and disperse the river sand as much as possible to avoid clumping, the dispersed river sand is transmitted to the main transmission belt 7 and the first transmission belt 11 by the circulating assembly 15, the second magnetic separation is performed by the magnetic separation module 8 on the first transmission belt 11 to improve the magnetic separation effect, that is, the main transmission belt 7 and the first transmission belt 11 cooperate with the magnetic separation module 8 to magnetically separate the river sand twice, thereby avoiding the case that the preliminary magnetic separation is missed and affects the magnetic separation effect.

[0044] In one embodiment, for the above-mentioned stirring rod 25, the surface of each of the stirring rod 25 is rotatably connected with the inner side of one side of the aggregate hopper 14, and one end of each of the stirring rod 25 is rotatably connected with the inner wall of the other side of the aggregate hopper 14 through a bearing, thereby improving the stability of the rotation of the stirring rod 25.

[0045] In one embodiment, for the above-mentioned feeding hopper 1501, the inner side of the top end of the feeding hopper 1501 is connected with the bottom end of the aggregate hopper 14, thereby facilitating the passage of river sand in the aggregate hopper 14 into the feeding hopper 1501.

[0046] In one embodiment, for the above-mentioned spiral blade 1503, the top end of the spiral blade 1503 is rotatably connected with the inner side of the top end of the feeding hopper 1501, and the discharge pipe 1504 is located above the main transmission belt 7, thereby facilitating the transportation of river sand to the surface above the main transmission belt 7 through the discharge pipe 1504, and facilitating the secondary magnetic separation of river sand through the magnetic separation module 8 on the first transmission belt 11.

[0047] In one embodiment, for the above-mentioned magnetic separation module 8, the bottom end of one of the magnetic separation modules 8 is fitted with the inner side of the bottom end of the main transmission belt 7, and the top end of the other magnetic separation module 8 is fitted with the inner side of the top end of the first transmission belt 11, thereby facilitating magnetic separation.

[0048] In one embodiment, for the above-mentioned fixed frame 1, the surface of the fixed frame 1 is connected with a protective shell 9, and one side of the small transmission wheel 4 and the other side of the large transmission wheel 5 are rotatably connected with the inner wall of one side of the protective shell 9 through a bearing, thereby improving the stability of the rotation of the small transmission wheel 4 and the large transmission wheel 5.

[0049] In one embodiment, for the above-mentioned second transmission belt 13, the second transmission belt 13 is located above the aggregate hopper 14, thereby facilitating the collection and transportation of river sand into the aggregate hopper 14.

[0050] In one embodiment, for the above-mentioned connecting plate 16, the surface of the connecting plate 16 is fitted with the surface of the first transmission belt 11 and the surface of the second transmission belt 13, thereby facilitating the transportation of river sand onto the second transmission belt 13 through the inclined connecting plate 16, which helps to prolong the contact time of river sand with the magnetic separation module 8 on the main transmission belt 7, thereby improving the effect of preliminary magnetic separation.

[0051] According to the above technical scheme of the utility model, firstly, the second driving source 3 drives the transmission rotation among the small transmission wheel 4, the large transmission wheel 5 and the small transmission belt 6, then the large transmission wheel 5 drives the main transmission belt 7 to drive operation, and the third driving source 10 and the fourth driving source 12 are started, respectively drive the first transmission belt 11 and the second transmission belt 13 to drive transmission, wherein the transmission direction of the second transmission belt 13 is counterclockwise, the transmission direction of the first transmission belt 11 is clockwise, and the transmission direction of the main transmission belt 7 can be adjusted clockwise or counterclockwise as required, then the river sand required for magnetic separation is circulated to the connecting plate 16, at this time, the transmission direction of the first transmission belt 11 is clockwise, and the transmission direction of the main transmission belt 7 is counterclockwise rotation, under the action of the earth's gravity, the river sand will gradually fall on the surface of the second transmission belt 13 from the inclined connecting plate 16, in the process of conveying the river sand to the right through the second transmission belt 13, the magnetic particles in the river sand will be first magnetically attracted by the magnetic separation module 8 on the main transmission belt 7, then the counterclockwise transmission of the main transmission belt 7 will make the magnetic particles fall on the first transmission belt 11 driven clockwise when losing the magnetic attraction of the magnetic separation module 8 on the main transmission belt 7, continue to be magnetically attracted by the magnetic separation module 8 on the first transmission belt 11 and fall into the external collection barrel, which is the preliminary magnetic separation, and the river sand on the second transmission belt 13 will gradually fall into the collecting hopper 14, after a batch of river sand falls into the collecting hopper 14 and the magnetic particles are conveyed to the external collection barrel through the first transmission belt 11 at the bottom end of the main transmission belt 7, the external stops feeding this batch, and the transmission direction of the main transmission belt 7 is adjusted to clockwise, then the driving gear 22 is driven to rotate by the first driving source 21, thereby driving the two driven gears 24 meshing with the driving gear 22 to rotate, and then the river sand is dispersed by the stirring blades 26, thereby avoiding the agglomeration, and the dispersed river sand enters the feeding hopper 1501, the helical blade 1503 is driven to rotate by the fifth driving source 1502, so that the river sand is conveyed to the upper surface of the main transmission belt 7 through the discharge pipe 1504, the main transmission belt 7 conveys the river sand to the upper surface of the first transmission belt 11, and the river sand is subjected to secondary magnetic separation by the magnetic separation module 8 on the first transmission belt 11, so as to improve the magnetic separation effect, that is, the initial position of the river sand is on the second transmission belt 13 for preliminary magnetic separation and conveying, and the final position of the river sand after magnetic separation is conveyed to the left at the top end of the first transmission belt 11, so that the river sand is subjected to two times of magnetic separation, thereby avoiding the influence of agglomeration on the magnetic separation effect of the river sand, wherein the inside of the collecting hopper 14 is washed by clean water by opening the sealing cover 1505, and dirt is discharged.

[0052] Through the above technical scheme, the active gear 22 and the two driven gears 24 are engaged to drive the stirring blade 26 to rotate to scatter the river sand, so as to avoid clumping as much as possible, the fifth driving source 1502 drives the spiral blade 1503 to rotate to convey the scattered river sand to the main transmission belt 7 and the first transmission belt 11, and the first transmission belt 11 is provided with a magnetic separation module 8 for secondary magnetic separation, so that the magnetic separation effect is improved, that is, the river sand is subjected to twice magnetic separation through the cooperation of the magnetic separation modules 8 on the main transmission belt 7 and the first transmission belt 11, so that the case that the preliminary magnetic separation is missed and the magnetic separation effect is affected is avoided, wherein the sealing cover 1505 is opened to facilitate the inside of the material collecting hopper 14 to be washed by clean water to discharge dirt.

[0053] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The above disclosed preferred embodiments of the utility model are only used to help explain the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific embodiments described. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. A semi-counterflow river sand magnetic separator, comprising a fixed frame (1), a large transmission wheel (5) and a collecting hopper (14), the top end of the fixed frame (1) is connected with a second driving source (3), the power output end of the second driving source (3) is power-connected with a small transmission wheel (4), the surface of the small transmission wheel (4) is drivingly connected with a small transmission belt (6), and the large transmission wheel (5) is drivingly connected with the small transmission wheel (4) through the small transmission belt (6), characterized in that: the power output end of the large transmission wheel (5) is drivingly connected with a main transmission belt (7) through two transmission wheels, the surface of the fixed frame (1) is connected with two magnetic separation modules (8), the surface of the fixed frame (1) is connected with a third driving source (10), the power output end of the third driving source (10) is drivingly connected with a first transmission belt (11) through two transmission wheels, the surface of the fixed frame (1) is connected with a fourth driving source (12), the power output end of the fourth driving source (12) is drivingly connected with a second transmission belt (13) through two transmission wheels, the collecting hopper (14) is located on one side of the fixed frame (1), the collecting hopper (14) is respectively provided with a stirring assembly (2) and a circulating assembly (15), and the surface of the fixed frame (1) is connected with a connecting plate (16). The surface of the stirring assembly (2) is connected with the surface of the collecting hopper (14) for agitating river sand to avoid caking. The surface of the circulating assembly (15) is connected with the surface of the collecting hopper (14) for conveying the river sand.

2. A semi-counterflow river sand magnetic separator according to claim 1, characterized in that, The stirring assembly (2) comprises a first driving source (21), two supporting rods (23) and two driven gears (24), the first driving source (21) is arranged on one side of the collecting hopper (14), the power output end of the first driving source (21) is power-connected with a driving gear (22), the two supporting rods (23) are both rotationally arranged on one side of the collecting hopper (14), the two driven gears (24) are respectively arranged on one end of the two supporting rods (23), the two driven gears (24) are both meshingly connected with the driving gear (22), one side of the driving gear (22) and one side of the two driven gears (24) are both connected with stirring rods (25), and the surfaces of the three stirring rods (25) are all connected with a plurality of stirring blades (26).

3. A semi-counterflow river sand magnetic separator according to claim 2, characterized in that, The surface of each stirring rod (25) is rotationally connected with the inside of one side of the collecting hopper (14), and one end of each stirring rod (25) is rotationally connected with the inner wall of the other side of the collecting hopper (14) through a bearing.

4. A semi-counterflow river sand magnetic separator according to claim 1, characterized in that, The circulating assembly (15) comprises a feeding hopper (1501), a fifth driving source (1502) and a discharge pipe (1504), the feeding hopper (1501) is arranged at the bottom end of the collecting hopper (14), the fifth driving source (1502) is arranged at the bottom end of the collecting hopper (14), the power output end of the fifth driving source (1502) is power-connected with a spiral blade (1503), and the discharge pipe (1504) is arranged on the surface of the feeding hopper (1501).

5. A semi-reverse current river sand magnetic separator according to claim 4, characterized in that, The top end of the feeding hopper (1501) is in communication with the bottom end of the collecting hopper (14).

6. A semi-reverse current river sand magnetic separator according to claim 4, characterized in that, The top end of the spiral blade (1503) is rotationally connected with the top end of the feeding hopper (1501), and the discharge pipe (1504) is located above the main transmission belt (7).

7. A semi-counterflow river sand magnetic separator according to claim 1, characterized in that, The bottom end of one of the magnetic separation modules (8) is in abutment with the inner side of the bottom end of the main transmission belt (7), and the top end of the other magnetic separation module (8) is in abutment with the inner side of the top end of the first transmission belt (11).

8. A semi-counterflow river sand magnetic separator according to claim 1, characterized in that, The surface of the fixed frame (1) is connected with a protective shell (9), one side of the small transmission wheel (4) and the other side of the large transmission wheel (5) are both rotationally connected with the inner wall of one side of the protective shell (9) through bearings.

9. A semi-reverse current river sand magnetic separator according to claim 1, characterized in that, The second transmission belt (13) is located above the collecting hopper (14).

10. A semi-counterflow river sand magnetic separator according to claim 1, characterized in that, The surface of the connecting plate (16) is in abutment with the surface of the first transmission belt (11) and the surface of the second transmission belt (13).

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