Metal detector for belt conveyor

Abstract

A metal detector for a belt conveyor relates to the technical field of metal detectors and comprises a support table vertically arranged in a lifting manner, two side baffles fixedly connected with the support table are vertically arranged below the support table, and a fixed U-shaped plate with a downward open end is arranged between the support table and the side baffles. The two bottom ends of the fixed U-shaped plate are correspondingly and fixedly connected with the two side baffles, a detector body and an alarm are fixedly arranged on the inner top and the outer top of the fixed U-shaped plate respectively, a cleaning assembly is arranged at the position, between the two side baffles, of the bottom of the supporting table, and the cleaning assembly and the detector body are arranged front and back in the conveying direction of a belt of the belt conveyor. An adjusting mechanism fixedly connected with the supporting table is arranged below the supporting table. The metal detector for the belt conveyor solves the problem that an existing metal detector for the belt conveyor cannot screen metal substances in the belt conveyor. The problem that the adaptability is poor due to the fact that only materials on a belt conveyor with a certain fixed width can be detected is solved; and rapid movement is not convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of metal detectors, in particular to a metal detector for a belt conveyor. Background Art

[0002] A metal detector is a metal detection device mainly used in mining, stone, cement, coal, thermal power generation, building materials and other industries. It is installed on a belt conveyor to detect metal objects mixed in the belt-conveyed materials. When the non-magnetic materials conveyed by the belt contain metal objects and pass through the metal detector, the alarm on the metal detector sounds an alarm, and the staff quickly stops the belt conveyor and cleans out the metal objects in the belt-conveyed materials to prevent the metal objects from entering the crushing or extrusion equipment of the next process along with the belt-conveyed materials, thereby preventing damage to the crushing or extrusion equipment.

[0003] The existing metal detectors for belt conveyors have gradually exposed their shortcomings during use, mainly in the following aspects:

[0004] First, the existing metal detectors do not have the function of screening metal objects in belt conveyed materials. Specifically, when the metal detector detects that there are metal objects in the belt conveyed materials and sounds an alarm, the staff will shut down the belt conveyor and search and clean the metal substances in the belt conveyed materials. The manual search and cleaning method is time-consuming and labor-intensive, inefficient, and there is also the problem of incomplete cleaning.

[0005] Second, the existing metal detectors have poor adaptability. Specifically, metal detectors of the same specification can only detect materials on a belt conveyor of a certain fixed width. When detecting materials on belt conveyors of different widths, metal detectors of corresponding specifications need to be replaced.

[0006] Third, the existing metal detector is generally fixed on the belt conveyor by bolts, and it is inconvenient to move the metal detector when repairing or maintaining it.

[0007] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] In view of the defects in the prior art, the technical problem to be solved by the utility model is to provide a metal detector for a belt conveyor, which can automatically clean the metal substances in the materials on the belt conveyor after the metal detector sounds an alarm, and has a fast cleaning speed and good cleaning effect;

[0009] The metal detector can also detect materials on belt conveyors of different widths, which improves the adaptability of the metal detector;

[0010] The metal detector can also be moved quickly, which is convenient for maintenance and care, thereby improving the practicability of the metal detector.

[0011] In order to solve the above problems, the utility model provides the following technical solutions:

[0012] A metal detector for a belt conveyor comprises a support platform arranged to be lifted vertically, two side baffles fixedly connected to the support platform are vertically arranged below the support platform, a fixed U-shaped plate with an open end arranged downward is arranged between the support platform and the side baffles, the two bottom ends of the fixed U-shaped plate are fixedly connected to the two side baffles respectively, and the inner top and outer top of the fixed U-shaped plate are respectively fixedly provided with a detector body and an alarm.

[0013] A cleaning component is provided at the bottom of the support platform between the two side baffles. The cleaning component and the detector body are arranged front and back along the transport direction of the belt conveyor. An adjustment mechanism fixedly connected to the support platform is provided below the support platform. The two side baffles and the adjustment mechanism are arranged front and back along the transport direction of the belt conveyor. Two moving components in contact with the ground are fixedly provided at the opposite ends of the support platform.

[0014] As an optimized solution, the cleaning component includes a sliding U-shaped plate that is arranged to slide back and forth horizontally, the open end of the sliding U-shaped plate is arranged downward, a moving block is provided inside the sliding U-shaped plate for horizontal reciprocating sliding, the moving block is perpendicular to the sliding direction of the sliding U-shaped plate, and an electromagnetic suction cup is provided at the bottom of the moving block for vertical lifting.

[0015] As an optimized solution, the adjustment mechanism includes a horizontally fixed support plate, the bottom of the support plate is provided with two rotating plates arranged to rotate along a plumb line, the bottom of each rotating plate is provided with a driving roller and a driven roller arranged to rotate along a plumb line, and a conveyor belt is sleeved on the driving roller and the driven roller under the same rotating plate, one end of each of the two conveyor belts extends between the two side baffles, and the bottom surface of the conveyor belt is flush with the bottom surface of the side baffle.

[0016] A linkage assembly is provided above the support plate, and the two rotating plates can be controlled to rotate synchronously in opposite directions through the linkage assembly.

[0017] As an optimized solution, the linkage assembly includes two rotating shafts and a rotating rod that are rotatably arranged along a plumb line. The rotating shafts and the rotating rod are both rotatably connected to the top of the support plate. A driven gear is fixedly connected to the top of one of the rotating shafts, and a driving gear meshing with the driven gear is fixedly sleeved on the upper part of the rotating rod.

[0018] The top of the rotating rod and another rotating shaft are respectively fixed with a passive wheel and a driving wheel, the driving wheel is connected to the passive wheel through a connecting belt, and the bottoms of the two rotating shafts pass through the supporting plate and are fixedly connected to the two rotating plates accordingly.

[0019] As an optimized solution, the mobile component includes a horizontally arranged base, universal wheels are provided at the four corners of the bottom of the base, a vertically arranged fixed tube is fixedly provided on the top of the base, the upper port of the fixed tube is sealed, a lifting rod is coaxially provided in the fixed tube for vertical sliding, the top end of the lifting rod passes through the top of the fixed tube and is fixedly connected to a positioning plate, and the positioning plate is fixedly connected to the support platform.

[0020] As an optimized solution, the bottom of the support platform is provided with two sliding plates arranged to slide back and forth horizontally, and the two sliding plates are fixedly connected to the sliding U-shaped plate.

[0021] Two upper reciprocating screw rods are arranged to rotate along a horizontal line below the support platform, and one end of the two upper reciprocating screw rods passes through two sliding plates respectively and is correspondingly threadedly connected with the two sliding plates.

[0022] As an optimized solution, a lower reciprocating screw rod rotating along a horizontal line is provided in the sliding U-shaped plate, the upper reciprocating screw rod is perpendicular to the lower reciprocating screw rod, and one end of the lower reciprocating screw rod passes through the moving block and is threadedly connected to the moving block.

[0023] As an optimized solution, an electric telescopic cylinder is fixedly provided on the bottom of the moving block, and the telescopic end of the electric telescopic cylinder is fixedly connected to the electromagnetic suction cup.

[0024] As an optimized solution, the two rotating shafts are coaxially arranged corresponding to the two driven rollers, and a fixing bracket is fixedly connected to the outer wall of each rotating shaft, and one end of the fixing bracket extends toward the driving roller and is fixedly connected to the rotating plate.

[0025] As an optimized solution, the interior of the fixed tube is coaxially provided with a fixed circular plate fixedly connected to its inner wall, and a single-thread screw is provided on the top of the fixed circular plate that rotates along the plumb line. One end of the single-thread screw extends upward into the lifting rod and is threadedly connected to the lifting rod.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] 1. When the materials on the belt conveyor pass through the two side baffles, the detector body detects the materials. When the materials contain metal substances, the alarm sounds an alarm, and the cleaning component automatically cleans the metal substances in the materials on the belt conveyor. The cleaning speed is fast, the cleaning effect is good, and the workload of the staff is reduced at the same time;

[0028] 2. The materials on the belt conveyors of different widths can be transported between the two side baffles through the adjustment mechanism. When the materials pass through the two side baffles, the detector body detects the materials, realizing the function of detecting materials on belt conveyors of different widths and improving the adaptability of the metal detector;

[0029] 3. The metal detector can be quickly moved through four moving devices, which is convenient for maintenance and service of the metal detector and improves the practicality of the metal detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0031] Figure 1 It is a schematic diagram of the structure of the utility model;

[0032] Figure 2 It is a structural schematic diagram of the cleaning component of the utility model;

[0033] Figure 3 It is a structural schematic diagram of the adjustment mechanism of the utility model;

[0034] Figure 4 It is a structural schematic diagram of the mobile component of the utility model.

[0035] In the figure: 1-belt conveyor; 2-adjustment mechanism; 3-linkage assembly; 4-detector body; 5-fixed U-shaped plate; 6-alarm; 7-support table; 8-cleaning assembly; 9-side baffle; 10-moving assembly; 11-electromagnetic suction cup; 12-signal receiver; 13-first drive motor; 14-driven wheel; 15-transmission belt; 16-drive wheel; 17-moving block; 18-sliding U-shaped plate; 19-sliding plate; 20-upper reciprocating screw rod; 21-fixed plate; 22-second drive motor; 23-second connecting plate; 24-lower reciprocating screw rod; 25 -Electric telescopic cylinder; 26-driven wheel; 27-connecting belt; 28-driving wheel; 29-first connecting plate; 30-control motor; 31-support plate; 32-fixed bracket; 33-servo motor; 34-driving roller; 35-conveyor belt; 36-rotating rod; 37-rotating plate; 38-driving gear; 39-driven roller; 40-rotating shaft; 41-driven gear; 42-fixed circular plate; 43-sliding circular plate; 44-positioning plate; 45-lifting rod; 46-fixed tube; 47-single threaded rod; 48-built-in motor; 49-universal wheel; 50-base. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0037] like Figures 1 to 4 As shown, a metal detector for a belt conveyor includes a support platform 7 that is vertically lifted and lowered, two side baffles 9 that are vertically fixedly connected to the support platform 7 are vertically arranged below the support platform 7, a fixed U-shaped plate 5 with an open end downwardly arranged is arranged between the support platform 7 and the side baffles 9, the two bottom ends of the fixed U-shaped plate 5 are correspondingly fixedly connected to the two side baffles 9, and the inner top and outer top of the fixed U-shaped plate 5 are respectively fixedly provided with a detector body 4 and an alarm 6,

[0038] A cleaning assembly 8 is provided at the bottom of the support platform 7 between the two side baffles 9. The cleaning assembly 8 and the detector body 4 are arranged front and back along the conveying direction of the belt of the belt conveyor 1. An adjustment mechanism 2 fixedly connected to the support platform 7 is provided below the support platform 7. The two side baffles 9 and the adjustment mechanism 2 are arranged front and back along the conveying direction of the belt of the belt conveyor 1. Two moving assemblies 10 in contact with the ground are fixedly provided at opposite ends of the support platform 7.

[0039] The support platform 7 descends to the bottom of the two side baffles 9 and frictionally contacts the belt of the belt conveyor 1. When the material on the belt conveyor 1 passes through the two side baffles 9, the detector body 4 detects the material; after the alarm 6 sounds an alarm, the cleaning component 8 can automatically clean the metal substances in the material on the belt conveyor 1; the material on the belt conveyor 1 of different widths can be transported between the two side baffles 9 through the adjustment mechanism 2; the equipment can be quickly moved through the four moving components 10.

[0040] The cleaning assembly 8 includes a sliding U-shaped plate 18 that is horizontally reciprocatingly slidable, the open end of the sliding U-shaped plate 18 is downwardly arranged, a moving block 17 is horizontally reciprocatingly slidable in the sliding U-shaped plate 18, the moving block 17 is perpendicular to the sliding direction of the sliding U-shaped plate 18, and an electromagnetic suction cup 11 is vertically lifted at the bottom of the moving block 17;

[0041] The electromagnetic suction cup 11 descends to a position close to the material on the belt conveyor 1. After the alarm 6 sounds an alarm, the sliding U-shaped plate 18 and the moving block 17 both slide back and forth horizontally, thereby driving the electromagnetic suction cup 11 to move between the two side baffles 9, thereby quickly adsorbing the metal substances in the material.

[0042] The adjustment mechanism 2 includes a horizontally fixed support plate 31, two rotating plates 37 arranged to rotate along a vertical line are arranged at the bottom of the support plate 31, and a driving roller 34 and a driven roller 39 arranged to rotate along a vertical line are arranged at the bottom of the rotating plate 37. The driving roller 34 and the driven roller 39 under the same rotating plate 37 are sleeved with a conveyor belt 35, one end of the two conveyor belts 35 extends between the two side baffles 9, and the bottom surface of the conveyor belt 35 is flush with the bottom surface of the side baffle 9.

[0043] A linkage assembly 3 is provided above the support plate 31, and the linkage assembly 3 can control the two rotating plates 37 to rotate synchronously in opposite directions;

[0044] When inspecting materials on belt conveyors 1 of different widths, the two conveyor belts 35 are controlled to rotate synchronously in opposite directions through the linkage component 3 until the spacing between the other ends of the two conveyor belts 35 matches the width of the belt conveyor 1. During the rotation of the conveyor belts 35, the materials on the belt conveyor 1 can be transported between the two side baffles 9.

[0045] The linkage assembly 3 includes two rotating shafts 40 and a rotating rod 36 that are rotatably arranged along a plumb line. The rotating shafts 40 and the rotating rod 36 are both rotatably connected to the top of the support plate 31. A driven gear 41 is fixedly connected to the top of one of the rotating shafts 40. A driving gear 38 that meshes with the driven gear 41 is fixedly sleeved on the upper part of the rotating rod 36.

[0046] The top of the rotating rod 36 and the other rotating shaft 40 are respectively fixed with a passive wheel 26 and a driving wheel 28, and the driving wheel 28 is connected to the passive wheel 26 through a connecting belt 27. The bottoms of the two rotating shafts 40 pass through the supporting plate 31 and are fixedly connected to the two rotating plates 37 accordingly.

[0047] With the cooperation between the passive wheel 26 and the driving gear 38 , the active wheel 28 and the driven gear 41 can rotate synchronously in opposite directions, thereby controlling the two rotating plates 37 to rotate synchronously in opposite directions.

[0048] The moving component 10 includes a horizontally arranged base 50, and universal wheels 49 are provided at the four corners of the bottom of the base 50. A vertically arranged fixed tube 46 is fixedly provided on the top of the base 50, and the upper end of the fixed tube 46 is sealed. A lifting rod 45 is coaxially provided in the fixed tube 46 for vertical sliding. The top end of the lifting rod 45 passes through the top of the fixed tube 46 and is fixedly connected to a positioning plate 44, and the positioning plate 44 is fixedly connected to the support platform 7.

[0049] Two sliding plates 19 are arranged at the bottom of the support platform 7 to slide back and forth horizontally. Both sliding plates 19 are fixedly connected to the sliding U-shaped plate 18 .

[0050] Two upper reciprocating screw rods 20 are arranged to rotate along a horizontal line below the support platform 7 , and one end of the two upper reciprocating screw rods 20 passes through two sliding plates 19 respectively and is correspondingly threadedly connected to the two sliding plates 19 .

[0051] Two fixing plates 21 are fixedly connected to the bottom of the support platform 7 , and two ends of the two upper reciprocating screw rods 20 are rotatably connected to the two fixing plates 21 .

[0052] The same end of the two upper reciprocating screw rods 20 passes through one of the fixing plates 21 and is fixedly connected to the driving wheel 16 and the driven wheel 14 respectively. The driving wheel 16 is connected to the driven wheel 14 through a transmission belt 15 .

[0053] A first drive motor 13 is fixedly mounted on one of the fixing plates 21 , and an output end of the first drive motor 13 is fixedly connected to the drive wheel 16 .

[0054] A lower reciprocating screw rod 24 is arranged to rotate along a horizontal line in the sliding U-shaped plate 18 . The upper reciprocating screw rod 20 is perpendicular to the lower reciprocating screw rod 24 . One end of the lower reciprocating screw rod 24 passes through the moving block 17 and is threadedly connected to the moving block 17 .

[0055] The two ends of the lower reciprocating screw rod 24 are rotatably connected to the relative inner walls of the sliding U-shaped plate 18 , and a second drive motor 22 is fixedly provided at the end of the sliding U-shaped plate 18 . The output end of the second drive motor 22 passes through the sliding U-shaped plate 18 and is fixedly connected to the lower reciprocating screw rod 24 .

[0056] The first drive motor 13 and the second drive motor 22 are both provided with a signal receiver 12. When the alarm 6 sounds an alarm, the signal receiver 12 receives the signal and controls the first drive motor 13 and the second drive motor 22 to rotate.

[0057] An electric telescopic cylinder 25 is fixedly provided at the bottom of the moving block 17 , and a telescopic end of the electric telescopic cylinder 25 is fixedly connected to the electromagnetic suction cup 11 .

[0058] The two rotating shafts 40 are coaxially arranged corresponding to the two driven rollers 39. The outer wall of the rotating shaft 40 is fixedly connected with a fixing bracket 32. One end of the fixing bracket 32 ​​extends toward the direction close to the driving roller 34 and is fixedly connected to the rotating plate 37.

[0059] The fixing bracket 32 ​​can enhance the connection stability between the rotating shaft 40 and the rotating plate 37 .

[0060] A servo motor 33 is fixedly mounted on the top of each rotating plate 37 . The output ends of the two servo motors 33 pass through the two rotating plates 37 and are fixedly connected to the two driving rollers 34 .

[0061] A fixed circular plate 42 is coaxially disposed inside the fixed tube 46 and fixedly connected to its inner wall. A single-thread screw 47 is disposed on the top of the fixed circular plate 42 and rotates along the plumb line. One end of the single-thread screw 47 extends upward into the lifting rod 45 and is threadedly connected to the lifting rod 45.

[0062] A sliding circular plate 43 is coaxially fixed to the bottom of the lifting rod 45 and is vertically slidably connected to the inner wall of the fixed tube 46 . The sliding circular plate 43 is threadedly connected to the single-thread screw 47 .

[0063] A built-in motor 48 is fixedly disposed on the fixed tube 46 below the fixed circular plate 42 . An output end of the built-in motor 48 passes through the fixed circular plate 42 and is fixedly connected to a single-thread screw 47 .

[0064] The support plate 31 is fixedly connected to the support platform 7 via the first connecting plate 29 . A control motor 30 is fixedly provided on the top of the support plate 31 . The output end of the control motor 30 is fixedly connected to the driving wheel 28 .

[0065] The side baffles 9 are fixedly connected to the support platform 7 via two second connecting plates 23 .

[0066] The working principle of this device is:

[0067] When inspecting the material on the belt conveyor 1, the four built-in motors 48 respectively drive the four single-thread screws 47 to rotate, and then drive the four lifting rods 45 to slide downward, thereby driving the support platform 7 to move downward until the two side baffles 9 and the two conveyor belts 35 are in contact with the belt of the belt conveyor 1. The electric telescopic cylinder 25 drives the electromagnetic suction cup 11 to descend to a suitable position, and the belt conveyor 1 drives the material to move. At the same time, the two servo motors 33 drive the two driving rollers 34 and the two conveyor belts 35 to rotate. The material on the belt of the belt conveyor 1 can be transported into the two side baffles 9 with the cooperation of the two conveyor belts 35. The detector body 4 detects the material passing through the side baffles 9. When it is detected that the material contains metal substances, the alarm 6 sounds an alarm, and the staff quickly shuts down the belt conveyor. 1, at the same time, the two signal receivers 12 receive the signal and drive the first drive motor 13 and the second drive motor 22 to rotate respectively, the first drive motor 13 drives the drive wheel 16, the transmission belt 15, the driven wheel 14 and the two upper reciprocating screws 20 to rotate, and then drives the two sliding plates 19 to slide back and forth horizontally, thereby driving the sliding U-shaped plate 18 to slide back and forth horizontally, the second drive motor 22 drives the lower reciprocating screw 24 to rotate, and then drives the moving block 17 to slide back and forth horizontally, under the cooperation of the sliding U-shaped plate 18 and the moving block 17, the electromagnetic suction cup 11 moves between the two side baffles 9 and absorbs the metal substances in the material, realizing the function of automatically cleaning the metal substances in the material on the belt conveyor 1, and the cleaning speed is fast, the cleaning effect is good, and the workload of the staff is reduced;

[0068] When detecting materials on the belt conveyors 1 of different widths, the control motor 30 drives the driving wheel 28, the connecting belt 27, the driven wheel 26 and the driving gear 38 to rotate, and then drives the driven gear 41 to rotate. The driving wheel 28 and the driven gear 41 rotate synchronously in opposite directions. Under the transmission of the two rotating shafts 40, the two rotating plates 37 rotate synchronously in opposite directions, and then drive the two conveyor belts 35 to rotate synchronously in opposite directions until the spacing between the two conveyor belts 35 away from one end of the support platform 7 is adapted to the width of the belt conveyor 1. The materials on the belt of the belt conveyor 1 can be transported into the two side baffles 9 with the cooperation of the two conveyor belts 35. The detector body 4 detects the materials passing through the side baffles 9, thereby realizing the function of detecting materials on the belt conveyors 1 of different widths and improving the adaptability of the metal detector.

[0069] When the metal detector is moved, the four built-in motors 48 rotate in the opposite direction, thereby driving the four lifting rods 45 to rise, thereby driving the support platform 7 to rise, until the two side baffles 9 and the two conveyor belts 35 are separated from the belt conveyor 1. The staff moves the metal detector by holding the fixed tube 46, thereby realizing the function of quickly moving the metal detector, facilitating the maintenance and care of the metal detector, and improving the practicality of the metal detector.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A metal detector for a belt conveyor, characterized in that: The invention comprises a support platform (7) which is arranged to be lifted vertically, two side baffles (9) which are fixedly connected to the support platform (7) are arranged vertically below the support platform (7), a fixed U-shaped plate (5) with an open end arranged downward is arranged between the support platform (7) and the side baffles (9), the two bottom ends of the fixed U-shaped plate (5) are fixedly connected to the two side baffles (9) respectively, and a detector body (4) and an alarm (6) are fixedly arranged on the inner top and the outer top of the fixed U-shaped plate (5), respectively. A cleaning assembly (8) is provided at a position between two side baffles (9) at the bottom of the support platform (7); the cleaning assembly (8) and the detector body (4) are arranged front and back along the conveying direction of the belt of the belt conveyor (1); an adjustment mechanism (2) fixedly connected to the support platform (7) is provided below the support platform (7); the two side baffles (9) and the adjustment mechanism (2) are arranged front and back along the conveying direction of the belt of the belt conveyor (1); and two moving assemblies (10) in contact with the ground are fixedly provided at opposite ends of the support platform (7).

2. The metal detector for a belt conveyor according to claim 1, characterized in that: The cleaning assembly (8) comprises a sliding U-shaped plate (18) arranged to slide back and forth horizontally, the open end of the sliding U-shaped plate (18) being arranged downward, a moving block (17) being arranged to slide back and forth horizontally inside the sliding U-shaped plate (18), the moving block (17) being perpendicular to the sliding direction of the sliding U-shaped plate (18), and an electromagnetic suction cup (11) being arranged to lift vertically at the bottom of the moving block (17).

3. The metal detector for a belt conveyor according to claim 2, characterized in that: The adjustment mechanism (2) comprises a support plate (31) fixedly arranged horizontally, two rotating plates (37) arranged to rotate along a vertical line are arranged at the bottom of the support plate (31), a driving roller (34) and a driven roller (39) arranged to rotate along a vertical line are arranged at the bottom of the rotating plates (37), a conveyor belt (35) is sleeved on the driving roller (34) and the driven roller (39) below the rotating plate (37), one end of the two conveyor belts (35) extends between the two side baffles (9), and the bottom surface of the conveyor belt (35) is flush with the bottom surface of the side baffle (9). A linkage assembly (3) is provided above the support plate (31), and the linkage assembly (3) can control the two rotating plates (37) to rotate synchronously in opposite directions.

4. The metal detector for a belt conveyor according to claim 3, characterized in that: The linkage assembly (3) comprises two rotating shafts (40) rotatably arranged along a vertical line and a rotating rod (36), wherein the rotating shafts (40) and the rotating rod (36) are both rotatably connected to the top of the support plate (31), wherein a driven gear (41) is fixedly connected to the top of one of the rotating shafts (40), and a driving gear (38) meshing with the driven gear (41) is fixedly sleeved on the upper portion of the rotating rod (36). The top of the rotating rod (36) and the other rotating shaft (40) are respectively fixedly connected with a passive wheel (26) and a driving wheel (28); the driving wheel (28) is connected to the passive wheel (26) via a connecting belt (27); the bottoms of the two rotating shafts (40) pass through the supporting plate (31) and are fixedly connected to the two rotating plates (37) respectively.

5. The metal detector for a belt conveyor according to claim 4, characterized in that: The moving assembly (10) comprises a horizontally arranged base (50), the four corners of the bottom of the base (50) are provided with universal wheels (49), the top of the base (50) is fixedly provided with a vertically arranged fixed tube (46), the upper end of the fixed tube (46) is sealed, a vertically slidable lifting rod (45) is coaxially arranged inside the fixed tube (46), the top end of the lifting rod (45) passes through the top of the fixed tube (46) and is fixedly connected to a positioning plate (44), and the positioning plate (44) is fixedly connected to the support platform (7).

6. The metal detector for a belt conveyor according to claim 5, characterized in that: The bottom of the support platform (7) is provided with two sliding plates (19) arranged to slide back and forth horizontally, and the two sliding plates (19) are fixedly connected to the sliding U-shaped plate (18). Two upper reciprocating screw rods (20) are arranged to rotate along a horizontal line below the support platform (7), and one end of the two upper reciprocating screw rods (20) passes through two sliding plates (19) respectively and is correspondingly threadedly connected to the two sliding plates (19).

7. The metal detector for a belt conveyor according to claim 6, characterized in that: A lower reciprocating screw rod (24) is arranged to rotate along a horizontal line in the sliding U-shaped plate (18), the upper reciprocating screw rod (20) is perpendicular to the lower reciprocating screw rod (24), and one end of the lower reciprocating screw rod (24) passes through the moving block (17) and is threadedly connected to the moving block (17).

8. The metal detector for a belt conveyor according to claim 7, characterized in that: An electric telescopic cylinder (25) is fixedly provided at the bottom of the moving block (17), and the telescopic end of the electric telescopic cylinder (25) is fixedly connected to the electromagnetic suction cup (11).

9. The metal detector for a belt conveyor according to claim 8, characterized in that: The two rotating shafts (40) are coaxially arranged corresponding to the two driven rollers (39), and a fixed bracket (32) is fixedly connected to the outer wall of each rotating shaft (40). One end of the fixed bracket (32) extends in a direction close to the driving roller (34) and is fixedly connected to the rotating plate (37).

10. The metal detector for a belt conveyor according to claim 9, characterized in that: The interior of the fixed tube (46) is coaxially provided with a fixed circular plate (42) fixedly connected to the inner wall thereof, and the top of the fixed circular plate (42) is provided with a single-thread screw (47) that rotates along a plumb line, and one end of the single-thread screw (47) extends upward into the lifting rod (45) and is threadedly connected to the lifting rod (45).

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