Metal foreign matter detection device for conveying belt

Abstract

The utility model relates to the technical field of metal detectors, in particular to a metal foreign matter detection device for a conveying belt, which comprises a conveying mechanism comprising a support frame, a conveying roller and a driving device, a conveying belt is arranged above the conveying roller, and the conveying belt is in driving connection with the driving device; the detection mechanism is mounted on the support frame and is used for detecting metal foreign matters in the minerals; the taking-out mechanism is installed on the supporting frame and used for taking out the metal foreign matter in the minerals on the conveying belt; the taking-out mechanism comprises an adsorption head, the adsorption head is in driving connection with a horizontal reciprocating mechanism, the horizontal reciprocating mechanism is in driving connection with a lifting mechanism, the lifting mechanism is installed on the supporting frame, the horizontal reciprocating mechanism can drive the adsorption head to do horizontal reciprocating motion, and the lifting mechanism can drive the adsorption head to do vertical reciprocating motion. And the adsorption head is jointly driven to move obliquely downwards to be inserted into the minerals, then horizontally move and then move obliquely upwards to adsorb deep foreign matters out.

Description

Technical Field

[0001] The utility model relates to the technical field of metal detectors, and specifically provides a metal foreign body detection device for a conveyor belt. Background Art

[0002] With the development of society and the advancement of science and technology, metal detection has been widely used in various industries. In particular, in coal mining, metal detection systems can monitor metal impurities in coal during transportation, and detect metal foreign objects such as bucket teeth, manganese steel machine parts, sharp hole crowns, bar steel fragments, iron chains, etc. in the coal mine in advance to prevent them from falling into the next process.

[0003] In the existing technology, after the metal detector detects the metal foreign body, the worker stops the conveyor belt to pick out the iron block, which is very time-consuming and labor-intensive. Alternatively, the gantry drives the magnet to suck out the iron block in the coal mine. However, if the iron block is buried under the coal block, due to the large amount of coal blocks piled above, the magnetic force generated by the magnet is not enough to suck out the iron block from deep inside, causing the iron block to continue to move to the next process along the conveyor belt. Utility Model Content

[0004] In view of the above-mentioned defects, the present invention provides a metal foreign body detection device for a conveyor belt, the purpose of which is to solve the problem in the prior art that metal foreign bodies buried deep in conveyor belts are difficult to remove.

[0005] In order to achieve the above-mentioned object, the utility model provides a metal foreign body detection device for a conveyor belt, which includes a conveying mechanism, which includes a support frame, a conveying roller and a driving device are fixed on the support frame, a conveying belt is arranged above the conveying roller, and the conveying belt is driven and connected to the driving device;

[0006] A detection mechanism, which is mounted on the support frame and is used to detect metallic foreign matter in the minerals on the conveyor belt;

[0007] A taking-out mechanism, which is mounted on the support frame and is used to take out metallic foreign matter from the minerals on the conveyor belt;

[0008] The removal mechanism includes an adsorption head capable of adsorbing metal foreign matter, the adsorption head is driven and connected to a horizontal reciprocating mechanism, the horizontal reciprocating mechanism is driven and connected to a lifting mechanism, the lifting mechanism is installed on a support frame, the horizontal reciprocating mechanism can drive the adsorption head to move horizontally back and forth, and the lifting mechanism can drive the adsorption head to move up and down reciprocatingly.

[0009] Preferably, the lifting mechanism includes hydraulic cylinders symmetrically arranged on both sides of the support frame, the hydraulic cylinders are fixedly connected to the support plate, the support plate is fixed on the support frame, and the two hydraulic cylinder push rods are commonly fixedly connected to the horizontal reciprocating mechanism.

[0010] Preferably, the horizontal reciprocating mechanism includes a support frame fixed on the hydraulic cylinder top rod, a screw is rotatably installed in the support frame, the screw is coaxially fixed with the output shaft of the first motor, the first motor is fixed to the side wall of the support frame, the screw is threadedly engaged with the slider, the slider is slidingly engaged with the guide rod, the guide rod is fixedly connected to the support frame, and the slider is connected to the adsorption head through a first connecting rod.

[0011] Preferably, the upper end of the first connecting rod is rotatably mounted on the slider, the middle part of the first connecting rod is coaxially fixed with the gear, the gear is engaged with the rack, the rack is fixedly connected to the support frame, and the other end of the first connecting rod is fixedly connected to the adsorption head.

[0012] Preferably, the detection mechanism includes two side panels symmetrically fixed on the support frame, and a transmitting panel and a receiving panel are arranged between the two side panels. The transmitting panel and the receiving panel are detachably fixed on the two side panels. The transmitting panel is located above the conveyor belt, and the receiving panel is located below the conveyor belt. The transmitting panel and the receiving panel are both electrically connected to the first controller, and the first controller is fixed on the support frame.

[0013] Preferably, the first controller is electrically connected to the driving device and the second controller, the second controller is electrically connected to the hydraulic cylinder and the first motor, and the second controller is fixed on the support frame.

[0014] Preferably, at least two rows of first screw holes are opened on the upper part of the side panel from top to bottom, and any row of the first screw holes can be threadedly connected to the first bolts. The first bolts are also threadedly matched with the first beams, and the first beams are fixedly connected to the launch panel.

[0015] Preferably, at least two rows of second screw holes are opened from top to bottom on the lower part of the side panel, and any row of the second screw holes can be threadedly connected to the second bolts, and the second bolts are also threadedly matched with the second beam, and the second beam is fixedly connected to the receiving panel.

[0016] Preferably, a triangular plate is fixed below the support plate, and the triangular plate is fixed to the side wall of the support frame.

[0017] Preferably, the areas of the transmitting panel and the receiving panel are equal, and the projections of the transmitting panel and the receiving panel in the vertical direction overlap.

[0018] The purpose of this utility model is to provide a metal foreign body detection device for a conveyor belt, which has the following beneficial effects:

[0019] ① By setting up a hydraulic cylinder and a first motor to jointly drive the adsorption head, the adsorption head first moves obliquely downward and inserted into the mineral, then moves horizontally, and then moves obliquely upward. During the movement, the adsorption head will also rotate, which is more helpful to discharge the minerals nearby, increase the contact area during the movement, and help to adsorb foreign objects from deep inside.

[0020] ② By setting multiple rows of first screw holes, the height of the transmitting panel can be adjusted, and by setting second screw holes, the height of the receiving panel can be adjusted, so that the size of the entire detection channel can be adjusted to a suitable size according to the position of the conveyor belt, thereby increasing the accuracy of metal detection.

[0021] ③ By placing the transmitting panel above the conveyor belt, placing the receiving panel below the conveyor belt, and installing the transmitting panel and the receiving panel so that their projections in the vertical direction overlap, the penetration of the metal detection system is increased, thereby increasing the accuracy of the detector's detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view of a metal foreign body detection device for a conveyor belt;

[0023] Figure 2 This is an axonometric view of a metal foreign body detection device for a conveyor belt;

[0024] Figure 3 yes Figure 1 A local enlarged view of point A;

[0025] Figure 4 yes Figure 2 A local enlarged view of point B;

[0026] Figure 5 It is the axonometric drawing of the detection mechanism from the first perspective;

[0027] Figure 6 It is the axonometric drawing of the second perspective of the detection mechanism;

[0028] Figure 7 The present invention is a schematic diagram of a control unit of a metal foreign body detection device for a conveyor belt.

[0029] In the figure:

[0030] 10-support frame; 101-support beam; 102-support leg; 103-reinforcement frame; 11-transmission roller; 12-drive device; 13-conveyor belt; 15-adsorption head;

[0031] 20- hydraulic cylinder; 21- support plate;

[0032] 30-support frame; 31-screw rod; 32-second motor; 33-slider; 330-guide groove; 34-guide rod; 35-first connecting rod;

[0033] 40-gear; 41-rack;

[0034] 50-side panel; 51-transmitting panel; 52-receiving panel; 53-first controller;

[0035] 60- second controller;

[0036] 70-first screw hole; 71-first bolt; 72-first crossbeam;

[0037] 80 - second screw hole; 81 - second bolt; 82 - second crossbeam;

[0038] 90-set square. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] like Figure 1-7 As shown, a metal foreign body detection device for a conveyor belt includes a conveying mechanism, which includes a support frame 10. The support frame 10 is composed of two horizontally arranged support beams 101 and multiple vertical support legs 102. One end of the multiple support legs 102 is fixed to the lower end surface of the support beam 101, and the other end of the support leg 102 is placed stably on the ground. Conveyor rollers 11 are fixed on the two support beams 101. A conveyor belt 13 is arranged above the conveyor rollers 11. The conveyor rollers 11 support the conveyor belt 13. The conveyor belt 13 is connected to a driving device 12. The driving device 12 is fixed to the support frame 10. The driving device 12 is generally a high-horsepower motor. Its driving method is consistent with that of conventional mining conveyor belts. The conveyor rollers 11 also use conventional devices, which will not be described in detail in this utility model.

[0041] In order to increase the stability of the support frame 10 , a reinforcement frame 103 is fixed between every two adjacent support legs 102 .

[0042] Among them, the conveying roller 11 is a structure with a horizontal middle and raised ends, which can better wrap the coal blocks for transportation. The conveyor belt 13 is supported by the conveying roller 11, and its cross-sectional shape is also pressed by the mineral above to fit the shape of the conveying roller 11.

[0043] The device further comprises a detection mechanism, which is mounted on the support frame 10 , and the detection mechanism is used to detect metallic foreign matter in the minerals on the conveyor belt 13 .

[0044] The device also includes a removal mechanism, which is mounted on the support frame 10 and is used to remove metal foreign matter from the minerals on the conveyor belt 13. The removal mechanism includes an adsorption head 15 capable of adsorbing metal foreign matter. The adsorption head 15 is made of a neodymium magnet and is drivably connected to a horizontal reciprocating mechanism, which is drivably connected to a lifting mechanism. The lifting mechanism is mounted on the support frame 10 and can drive the adsorption head 15 to reciprocate horizontally, while the lifting mechanism can drive the adsorption head 15 to reciprocate vertically.

[0045] As a further explanation of this embodiment, the lifting mechanism includes hydraulic cylinders 20 symmetrically arranged on both sides of the support frame 10, with the bottom of the hydraulic cylinders 20 flush with the top of the support frame 10. The hydraulic cylinders 20 are fixed to the upper end surface of a support plate 21, which is fixed to the support frame 10, specifically, to the side wall of the support beam 101. The two push rods of the hydraulic cylinders 20 are fixedly connected to the horizontal reciprocating mechanism.

[0046] As a further explanation of this embodiment, the horizontal reciprocating mechanism includes a support frame 30 fixed on the top rod of the hydraulic cylinder 20, and a screw rod 31 is rotatably installed in the support frame 30. One end of the screw rod 31 passes through the side wall of the support frame 30 and is coaxially fixed with the output shaft of the first motor 32. The other end of the screw rod 31 is installed on the side wall of the support frame 30 away from the first motor 32 through a bearing. The first motor 32 is fixed to the side wall of the support frame 30. The screw rod 31 is threadedly engaged with the slider 33, and the slider 33 is movably engaged with the guide rod 34. Specifically, two guide grooves 330 are horizontally opened on the back of the slider 33. The two guide rods 34 are respectively arranged in the two guide grooves 330 and can slide relative to the guide grooves 330. The guide rod 34 is fixedly connected to the support frame 30, and the slider 33 is connected to the adsorption head 15 through the first connecting rod 35.

[0047] As a further explanation of this embodiment, the upper end of the first connecting rod 35 is rotatably mounted on the lower end surface of the horizontal portion of the slider 33, using a bearing mounting method. A gear 40 is coaxially fixed to the outer wall of the middle portion of the first connecting rod 35. The gear 40 meshes with a rack 41, which is fixed to the lower end surface of the bottom plate of the support frame 30. The other end of the first connecting rod 35 is fixedly connected to the adsorption head 15.

[0048] As a further explanation of this embodiment, the detection mechanism includes two side panels 50 fixedly mounted on the support frame 10, and the two side panels 50 are fixed to the upper end of the support beam 101. A transmitting panel 51 and a receiving panel 52 are arranged between the two side panels 50, and the transmitting panel 51 and the receiving panel 52 are detachably fixed to the two side panels 50. The transmitting panel 51 is located above the conveyor belt 13 and is used to transmit radio waves. The receiving panel 52 is located below the conveyor belt 13 and is used to receive radio waves. The transmitting panel 51 is electrically connected to the first controller 53, and the first controller 53 provides excitation for the transmitting panel 51. The first controller 53 is fixed to the support frame 10, and the receiving panel 52 is also electrically connected to the first controller 53. The first controller 53 receives the signal fed back by the receiving panel 52.

[0049] The areas of the transmitting panel 51 and the receiving panel 52 are equal, and the projections of the transmitting panel 51 and the receiving panel 52 in the vertical direction overlap.

[0050] As a further explanation of this embodiment, the first controller 53 is electrically connected to the second controller 60 , the second controller 60 is electrically connected to the hydraulic cylinder 20 and the first motor 32 , and the second controller 60 is fixed on the support frame 10 .

[0051] The first controller 53 is also electrically connected to the drive device 12. When the device is in use, a detection area is formed between the transmitting panel 51 and the receiving panel 52. When metal passes through the detection area, the alternating magnetic field in the detection area is disturbed, causing the receiving panel 52 to output an alternating voltage signal. The voltage signal is then received by the first controller 53, which then delays sending a signal to the drive device 12 and the second controller 60.

[0052] Among them, after the first controller 53 receives the signal output by the receiving panel 52, the time for delaying the signal is set according to the distance between the transmitting panel 51 and the adsorption head 15. The signal controls the driving device 12 to suspend operation, thereby suspending the operation of the conveyor belt 13. After the conveyor belt 13 is suspended, the foreign matter is just directly below the adsorption head 15.

[0053] After receiving the signal, the second controller 60 drives the hydraulic cylinder 20 and the first motor 32 to work. The hydraulic cylinder 20 drives the entire horizontal reciprocating mechanism to move downward, and the rotation of the first motor 32 drives the screw rod 31 to rotate, causing the slider 33 to move away from the first motor 32. After the two motion trajectories are superimposed, the suction head 15 moves diagonally downward away from the first motor 32. When it moves downward to the horizontal part of the conveyor belt 13, the hydraulic cylinder 20 can no longer descend. At this time, only the first motor 32 drives the slider 33 to continue moving away from the first motor 32. At this time, the suction head 15 moves horizontally. When it moves to the upward part of the conveyor belt 13, the hydraulic cylinder 20 starts and drives the entire horizontal reciprocating mechanism to move upward. At this time, the first motor 32 drives the slider 33 to continue moving away from the first motor 32. The two motion trajectories are superimposed, and the suction head 15 moves diagonally upward. After the hydraulic cylinder 20 reaches its maximum stroke, the slider 33 cooperates with the screw rod 31 to cause the suction head 15 to move horizontally toward the first motor 32 and reset.

[0054] Among them, a PLC timing module is set in the second controller 60, and the timing module is electrically connected to the hydraulic cylinder 20 and the first motor 32. The operator can prepare a PLC program in advance to control the start and stop of the hydraulic cylinder 20 and the first motor 32 according to the moving speed of the hydraulic cylinder 20 and the moving speed of the first motor 32.

[0055] Among them, a signal receiving module is also provided in the second controller 60. After the adsorption head 15 is reset, the first motor 32 stops working. At this time, the second controller 60 will send a signal to the first controller 53. After receiving the signal, the first controller 53 immediately sends a signal to the driving device 12, so that the driving device 12 resumes normal operation.

[0056] During the lateral movement of the slider 33, the slider 33 drives the first connecting rod 35 to move lateral, and the first connecting rod 35 drives the gear 40 to move lateral. The gear 40 engages with the rack 41, so that the gear 40 moves lateral and rotates at the same time, thereby causing the first connecting rod 35 to move lateral and rotate at the same time, and finally drives the adsorption head 15 to move lateral and rotate at the same time.

[0057] By setting up the hydraulic cylinder 20 and the first motor 32 to jointly drive the adsorption head 15, the adsorption head 15 first moves obliquely downward and inserted into the mineral, then moves horizontally, and then moves obliquely upward. During the movement, the adsorption head 15 will also rotate, which is more helpful to expel the minerals nearby, increase the contact area during the movement, and help to adsorb foreign objects in the deep.

[0058] It should be noted that if an ordinary screw rod is used for the screw rod 31, it is necessary to set in advance that the first motor 32 rotates a certain number of times and then reverses the same number of times; if a reciprocating screw rod is used for the screw rod 31, it is only necessary to set the number of times the first motor 32 rotates to ensure that the slider 33 resets after reaching the maximum stroke.

[0059] Since the second controller 60 controls the two hydraulic cylinders 20 simultaneously, the synchronization of the movements of the hydraulic cylinders 20 can be ensured.

[0060] In order to prevent the magnetic force of the adsorption head 15 from interfering with the operation of the first motor 32, an iron protective shell can be set on the outside of the first motor 32, and the iron protective shell can be fixed to the support frame 30. Secondly, the screw rod 31, the support frame 30, the slider 33, the guide rod 34, the first connecting rod 35, the gear 40, and the rack 41 are preferably made of high-strength polyformaldehyde plastic rather than metal materials. If it is really necessary to use metal materials, metals with lower magnetic permeability, such as copper, can be used. If necessary, the support beam 101 directly below the adsorption head 15 can also be changed to high-strength polyformaldehyde plastic. The length of the support beam 101 that needs to be changed to high-strength polyformaldehyde plastic can be 3m.

[0061] As a further explanation of this embodiment, at least two rows of first screw holes 70 are defined in the upper portion of the side panel 50 from top to bottom. Any row of the first screw holes 70 can be threadedly engaged with the first bolts 71. The first bolts 71 also threadably engage with the first crossbeam 72. Specifically, second threaded holes are defined on both sides of the first crossbeam 72, and the first bolts 71 are threadedly engaged with the second threaded holes. The first crossbeam 72 is fixedly connected to the launch panel 51.

[0062] As a further explanation of this embodiment, at least two rows of second screw holes 80 are defined in the lower portion of the side panel 50 from top to bottom. Any row of the second screw holes 80 can be threadedly engaged with a second bolt 81. The second bolt 81 further threadably engages with a second crossbeam 82. Specifically, third threaded holes are defined on both sides of the second crossbeam 82, and the second bolts 81 are threadedly engaged with the third threaded holes. The second crossbeam 82 is fixedly connected to the receiving panel 52.

[0063] When installing the detection mechanism, you can first install the side panel 50 on one side, then install the first crossbeam 72 and the second crossbeam 82, and then install the transmitting panel 51 and the receiving panel 52. After installing these components, install the side panel 50 on the other side. This split structural design allows the detection mechanism to be installed without disconnecting the conveyor belt 13.

[0064] By setting multiple rows of first screw holes 70, the height of the transmitting panel 51 can be adjusted, and by setting second screw holes 80, the height of the receiving panel 52 can be adjusted, so that the size of the entire detection channel can be adjusted to an appropriate size according to the position of the conveyor belt 13, thereby increasing the accuracy of metal detection.

[0065] By placing the transmitting panel 51 above the conveyor belt and the receiving panel 52 below the conveyor belt, the transmitting panel 51 and the receiving panel 52 are installed so that their projections in the vertical direction overlap, thereby increasing the penetration of the metal detection system and increasing the accuracy of the detector detection.

[0066] As a further explanation of this embodiment, a triangular plate 90 is fixed below the support plate 21, and the triangular plate 90 is fixed to the side wall of the support frame 10. The triangular plate 90 can enhance the stability of the support.

[0067] The present invention is not limited to the above-mentioned specific implementation methods. Various modifications made by ordinary technicians in this field based on the above-mentioned conception without creative work are all within the scope of protection of the present invention.

Claims

1. A metal foreign body detection device for a conveyor belt, characterized in that: The invention comprises a conveying mechanism, which comprises a support frame (10), a conveying roller (11) and a driving device (12) being fixed on the support frame (10), a conveying belt (13) being arranged above the conveying roller (11), and the conveying belt (13) being drivingly connected to the driving device (12); A detection mechanism, which is mounted on the support frame (10), and is used to detect metallic foreign matter in the minerals of the conveyor belt (13); A removal mechanism, which is mounted on the support frame (10), and is used to remove metallic foreign matter from the minerals on the conveyor belt (13); The removal mechanism includes an adsorption head (15) capable of adsorbing metal foreign matter, the adsorption head (15) is connected to a horizontal reciprocating mechanism, the horizontal reciprocating mechanism is connected to a lifting mechanism, the lifting mechanism is installed on a support frame (10), the horizontal reciprocating mechanism can drive the adsorption head (15) to move horizontally, and the lifting mechanism can drive the adsorption head (15) to move up and down.

2. The metal foreign body detection device for conveyor belt according to claim 1, characterized in that: The lifting mechanism comprises hydraulic cylinders (20) symmetrically arranged on both sides of the support frame (10), the hydraulic cylinders (20) being fixedly connected to a support plate (21), the support plate (21) being fixed on the support frame (10), and the top rods of the two hydraulic cylinders (20) being fixedly connected to the horizontal reciprocating mechanism.

3. The metal foreign body detection device for conveyor belt according to claim 2, characterized in that: The horizontal reciprocating mechanism includes a support frame (30) fixed on the top rod of the hydraulic cylinder (20), a screw rod (31) is rotatably installed in the support frame (30), the screw rod (31) is coaxially fixed with the output shaft of the first motor (32), the first motor (32) is fixed to the side wall of the support frame (30), the screw rod (31) is threadedly engaged with the slider (33), the slider (33) is slidably engaged with the guide rod (34), the guide rod (34) is fixedly connected to the support frame (30), and the slider (33) is connected to the adsorption head (15) through a first connecting rod (35).

4. The metal foreign body detection device for conveyor belt according to claim 3, characterized in that: The upper end of the first connecting rod (35) is rotatably mounted on the slider (33), the middle portion of the first connecting rod (35) is coaxially fixed with the gear (40), the gear (40) is meshed with the rack (41), the rack (41) is fixedly connected to the support frame (30), and the other end of the first connecting rod (35) is fixedly connected to the adsorption head (15).

5. The metal foreign body detection device for a conveyor belt according to claim 2 or 4, characterized in that: The detection mechanism includes two side panels (50) symmetrically fixed on the support frame (10), and a transmitting panel (51) and a receiving panel (52) are arranged between the two side panels (50). The transmitting panel (51) and the receiving panel (52) are detachably fixed on the two side panels (50). The transmitting panel (51) is located above the conveyor belt (13), and the receiving panel (52) is located below the conveyor belt (13). A first controller (53) is fixed on the support frame (10), and the transmitting panel (51) and the receiving panel (52) are both electrically connected to the first controller (53).

6. The metal foreign body detection device for a conveyor belt according to claim 5, characterized in that: The first controller (53) is electrically connected to the driving device (12) and the second controller (60), the second controller (60) is electrically connected to the hydraulic cylinder (20) and the first motor (32), and the second controller (60) is fixed on the support frame (10).

7. The metal foreign body detection device for a conveyor belt according to claim 5, characterized in that: At least two rows of first screw holes (70) are provided on the upper portion of the side panels (50) from top to bottom, and a first crossbeam (72) is provided between the upper portions of the two side panels (50). The first crossbeam (72) is threadedly connected to the first screw holes (70) via first bolts (71), and the first crossbeam (72) is fixedly connected to the launch panel (51).

8. The metal foreign body detection device for a conveyor belt according to claim 7, characterized in that: At least two rows of second screw holes (80) are provided on the lower portion of the side panels (50) from top to bottom, a second crossbeam (82) is provided between the lower portions of the two side panels (50), the second crossbeam (82) is threadedly connected to the second screw holes (80) via second bolts (81), and the second crossbeam (82) is fixedly connected to the receiving panel (52).

9. The metal foreign body detection device for a conveyor belt according to claim 2, characterized in that: A triangular plate (90) is fixed below the support plate (21), and the triangular plate (90) is fixed to the side wall of the support frame (10).

10. The metal foreign body detection device for a conveyor belt according to claim 5, characterized in that: The areas of the emitting panel (51) and the receiving panel (52) are equal, and the projections of the emitting panel (51) and the receiving panel (52) in the vertical direction coincide with each other.

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