A belt crack detection device for belt conveyor

Abstract

The present invention discloses a belt crack detection device for a belt conveyor, and relates to the technical field of belt conveyors. The belt crack detection device includes a mounting frame arranged on both sides of the corresponding upper belt in the belt conveyor, and the mounting frame is provided with a rope located below the upper belt, one end of the rope is connected with the mounting frame, and the other end of the rope is provided with a magnet, and also includes a magnetic sensor arranged on the mounting frame, and the magnet is adsorbed on one side of the magnetic sensor by magnetic force; the magnetic sensor adopts a Hall element, and the Hall element is fixed on the mounting frame through a metal shell that can be magnetically attracted, and the Hall element is electrically connected to the circuit breaker controlling the belt conveyor through a controller. The present invention can timely detect whether the belt has cracks, and automatically stop the operation of the belt conveyor in time after detecting the cracks, so as to avoid greater losses.

Description

Technical Field

[0001] The invention relates to the technical field of belt conveyors, in particular to a belt crack detection device for belt conveyors. Background Art

[0002] In mining, belt conveyor is a key equipment, mainly used for continuous conveying of bulk materials, such as ore, coal, etc. Belt conveyor is mainly composed of conveyor belt (core component for carrying materials, usually made of rubber, PVC and other materials), drive device (including motor, reducer and transmission roller, providing power), roller (supporting conveyor belt, reducing friction, divided into load-bearing and return rollers), tensioning device (maintaining proper tension of conveyor belt to prevent slipping), frame (structure supporting the whole equipment), cleaner (removing materials adhering to conveyor belt), protective device (such as deviation switch, emergency stop switch, etc., to ensure safe operation).

[0003] Working principle of belt conveyor: materials enter the conveyor belt from the feed port, the driving device drives the conveyor belt to operate, and the materials move along the conveyor belt to the discharge port for unloading.

[0004] In the prior art, since the conveying distance of belt conveyors used in mining is long, the cost of using conveyor belts is also high. When the ore is conveyed on the belt, some sharp-edged ores will cause friction and cutting on the conveyor belt. After long-term conveying operations, the belt may be damaged, and in severe cases, cracks may appear. If the conveyor belt cracks and is not repaired in time, large ores may be stuck in the cracks and interfere with the racks or rollers between the belt conveyors, eventually causing the belt cracks to be torn by large ores, or even causing the belt to be scrapped, resulting in greater economic losses. Summary of the invention

[0005] The purpose of the present invention is to provide a belt crack detection device for a belt conveyor, which can timely detect whether the belt has cracks, and automatically stop the operation of the belt conveyor in time after detecting the cracks, so as to avoid greater losses.

[0006] To achieve the above object, the present invention provides the following technical solution: a belt crack detection device for a belt conveyor, comprising mounting frames arranged on both sides of the corresponding upper belt in the belt conveyor, the mounting frames being provided with a rope located below the upper belt, one end of the rope being matched and connected with the mounting frame, the other end of the rope being provided with a magnet, and also comprising a magnetic sensor arranged on the mounting frame, the magnet being adsorbed on one side of the magnetic sensor by magnetic force;

[0007] The magnetic sensor adopts a Hall element, which is fixed on a mounting frame through a metal shell that can be magnetically attracted. The Hall element is electrically connected to a circuit breaker that controls the belt conveyor through a controller.

[0008] Preferably, a rope fixing seat is provided on the mounting frame, and one end of the rope is bound to the rope fixing seat.

[0009] Preferably, both ends of the rope are connected to magnets, one end of the rope is arranged below the upper belt and adsorbed on the magnetic sensor through the corresponding magnet, the other end of the rope is arranged below the lower belt and adsorbed on the mounting frame through the corresponding magnet, and the middle section of the rope is guided by a fixed pulley.

[0010] Preferably, both ends of the rope are connected to magnets, and the magnets at both ends of the rope are cooperatively connected to magnetic sensors; one end of the rope is arranged below the upper belt and adsorbed on the corresponding magnetic sensor through the corresponding magnet, and the other end of the rope is arranged below the lower belt and adsorbed on the corresponding magnetic sensor through the corresponding magnet, and the middle section of the rope is guided by a fixed pulley.

[0011] Preferably, it also includes a magnet resetter, which includes two reset rods arranged parallel to each other, the two reset rods are hollow and transitionally connected by a fixed handle; a slider is provided for sliding inside the end of the reset rod away from the fixed handle, and an adjusting wheel is provided for rotating outside the end of the reset rod away from the fixed handle, the surface of the adjusting wheel is provided with a guide groove with a spiral structure, the slider is provided with a driving plug extending to the outside of the reset rod, and the driving plug is inserted into the guide groove; an adjusting handle for driving the slider to move is also provided between the two reset rods, and an elastic member for resetting the slider is also provided in the reset rod; a buckle claw is also fixed on the rotating shaft of the adjusting wheel.

[0012] Preferably, the adjustment handle is transitionally connected to the slider via a connecting rod, the adjustment handle is arranged directly at and close to the fixed handle of the two reset rods, both ends of the adjustment handle extend to the inside of the two reset rods respectively, one end of the connecting rod is fixedly connected to the corresponding slider, and the other end of the connecting rod is fixedly connected to the adjustment handle.

[0013] Preferably, the adjusting wheel is rotatably disposed on the reset rod via a shaft seat.

[0014] Preferably, the elastic member is a spring, a limit seat is provided inside the reset rod and between the adjustment handle and the slider, and the spring is provided between the limit seat and the slider.

[0015] Preferably, the clasp claw is configured to be an arc-shaped structure, and the clasp opening of the clasp claw is rotated to the side wall of the reset rod, and the clasp opening of the clasp claw is completely in contact with the side wall of the reset rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention adsorbs a magnet on a metal shell for fixing a Hall element. The Hall element senses the size of the magnetic field. When the belt cracks and an opening appears, the material on the upper belt falls along the opening and hits the rope. Under the impact of the falling material, the rope causes the magnet to detach from the metal shell for fixing the Hall element. After the magnet detaches, the Hall element detects that the magnetic field disappears and transmits the detection result to the controller. The controller controls the circuit breaker to cut off the power, so that the belt conveyor suspends operation to prevent the belt from continuing to move to form a larger tear, thereby reducing economic losses.

[0018] 2. The present invention can quickly reset the magnet by designing a magnet resetter. The magnet resetter can reset two magnets at one time, thereby increasing the reset efficiency of the magnet.

[0019] 3. In the present invention, both ends of the rope are connected by magnets so that the rope can slide along the fixed pulley after being hit and fallen off by the ore, thereby preventing the rope from being broken, ensuring the safety of the rope and making the detection device reusable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structure of the present invention is schematically shown Figure 1 (Method 1 for connecting the rope and the mounting frame);

[0021] Figure 2 The structure of the present invention is schematically shown Figure 2 (Method 2 for connecting the rope and the mounting frame);

[0022] Figure 3 The structure of the present invention is schematically shown Figure 3 (Method 3 of connecting the rope and the mounting frame);

[0023] Figure 4 A diagram showing the matching mode of the magnet and the magnetic sensor of the present invention;

[0024] Figure 5 The use method of the magnet resetter of the present invention is Figure 1 (When the magnet is not in contact with the magnet sensor);

[0025] Figure 6 For the present invention Figure 5 A magnified view of part A in FIG.

[0026] Figure 7 The use method of the magnet resetter of the present invention is Figure 1 (When the magnet contacts the magnet sensor);

[0027] Figure 8 For the present invention Figure 7 A magnified view of part B in FIG.

[0028] Fig. 9 It is a structural schematic diagram of the magnet resetter of the present invention;

[0029] Fig.10 It is a structural schematic diagram of the adjusting wheel of the present invention;

[0030] Fig.11 The internal structure diagram of the magnet resetter of the present invention;

[0031] Fig.12 For the present invention Fig.11 A magnified view of part C in FIG.

[0032] Fig.13 For the present invention Fig.11 A magnified view of part D in FIG.

[0033] Fig.14 This is a diagram showing the arrangement of the drive plug of the present invention.

[0034] In the figure:

[0035] 11-upper belt, 12-lower belt,

[0036] 2- Rope,

[0037] 3- Magnet,

[0038] 4- Magnetic sensor,

[0039] 5-mounting frame, 51-rope fixing seat, 52-magnetic seat,

[0040] 6-Fixed pulley,

[0041] 7-magnet resetter, 71-reset rod, 711-axle seat, 712-limit seat, 72-fixed handle, 73-adjusting handle, 74-slider, 741-driving plug, 75-connecting rod, 76-spring, 77-adjusting wheel, 771-guide groove, 78-claw. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figures 1 to 3As shown, a belt crack detection device for a belt conveyor includes a mounting frame 5 arranged on both sides of the corresponding upper belt 11 in the belt conveyor, a rope 2 located below the upper belt 11 is arranged on the mounting frame 5, one end of the rope 2 is cooperatively connected with the mounting frame 5, and the other end of the rope 2 is provided with a magnet 3, and also includes a magnetic sensor 4 arranged on the mounting frame 5, and the magnet 3 is adsorbed on one side of the magnetic sensor 4 by magnetic force.

[0044] In this embodiment, the mounting frame 5 can be adaptively installed according to the actual working site. It can be rotatably installed on the working site of the belt conveyor, or it can be installed on the frame of the belt conveyor through fasteners. The above two installation methods are conventional technical means, and the specific setting method will not be described in detail.

[0045] As a specific implementation, the magnetic sensor 4 uses a Hall element, and the Hall element is fixed on the mounting frame 5 through a metal shell that can be magnetically attracted. The Hall element is electrically connected to the circuit breaker that controls the belt conveyor through a controller. The metal shell that can be magnetically attracted uses a metal shell of martensitic stainless steel or a metal shell of ferritic stainless steel. The magnet 3 is adsorbed on the metal shell used to fix the Hall element. The Hall element senses the size of the magnetic field. When the belt cracks and an opening appears, the material on the upper belt 11 falls along the opening and hits the rope 2. The rope 2 causes the magnet 3 to detach from the metal shell used to fix the Hall element under the impact of the falling material. After the magnet 3 detaches, the Hall element detects that the magnetic field disappears and transmits the detection result to the controller. The controller controls the circuit breaker to cut off the power, so that the belt conveyor suspends operation.

[0046] In this embodiment, the Hall element and the controller (such as a PLC controller, etc.) are conventional technologies, and the specific electrical connection method is not described in detail here.

[0047] Preferably, the portion of the rope 2 located below the upper belt 11 is arranged horizontally and close to the upper belt 11 .

[0048] Mode 1 for connecting one end of the rope 2 to the mounting frame 5:

[0049] like Figure 1 As shown, a rope fixing seat 51 is provided on the mounting frame 5 , and one end of the rope 2 is bound to the rope fixing seat 51 .

[0050] In this way, one end of the rope 2 is relatively fixed to the mounting frame 5, and the other end of the rope 2 is magnetically attracted to the magnetic sensor 4 through the magnet 3. The advantage of this design is that the connection strength between the end of the rope 2 not connected to the magnet 3 and the mounting frame 5 is high, ensuring that the end of the rope 2 connected to the magnet 3 can be directly hit and separated from the magnetic sensor 4, ensuring that the belt cracking condition can be detected in time. However, the disadvantage is that during the falling process of the magnet 3, it is not ruled out that the magnet 3 may be stuck on the frame of the belt conveyor, which will cause the end of the rope 2 connected to the magnet 3 to be fixed, and eventually the rope will be broken by the material.

[0051] Mode 2 for connecting one end of the rope 2 to the mounting frame 5:

[0052] like Figure 2 As shown, both ends of the rope 2 are connected with magnets 3, wherein one end of the rope 2 is arranged below the upper belt 11 and is adsorbed on the magnetic sensor 4 through the corresponding magnet 3, and the other end of the rope 2 is arranged below the corresponding lower belt 12 in the belt conveyor and is adsorbed on the mounting frame 5 through the corresponding magnet 3. The middle section of the rope 2 is guided and arranged through a fixed pulley 6, and is adaptively adjusted according to the actual structure of the frame of the belt conveyor so that the rope 2 does not interfere with the normal operation of the belt conveyor.

[0053] Specifically, the mounting frame 5 is provided with a magnetic seat 52, which can be a magnet seat or an adsorbed metal; the magnetic seat 52 preferably adopts a magnet seat to increase the connection strength of the corresponding magnet 3 matched therewith, to ensure that during the falling process of the material, the magnet 3 magnetically matched with the magnetic sensor 4 is preferentially dropped, to ensure that the belt conveyor can stop operating in time. If the magnet 3 magnetically matched with the magnetic sensor 4 is stuck with the belt conveyor frame, the magnet 3 matched with the magnetic seat 52 will drop subsequently to prevent the rope 2 from being broken.

[0054] Specifically, the fixed pulley 6 is fixedly mounted on the mounting frame 5 via fasteners.

[0055] Mode 3 of connecting one end of the rope 2 with the mounting frame 5:

[0056] like Figure 3 As shown, both ends of the rope 2 are connected with magnets 3, and the magnets 3 at both ends of the rope 2 are matched and connected with magnetic sensors 4. One end of the rope 2 is arranged below the upper belt 11 and is adsorbed on the corresponding magnetic sensor 4 through the corresponding magnet 3, and the other end of the rope 2 is arranged below the corresponding lower belt 12 in the belt conveyor and is adsorbed on the corresponding magnetic sensor 4 through the corresponding magnet 3. The middle section of the rope 2 is guided and arranged through a fixed pulley 6, and is adaptively adjusted according to the actual structure of the frame of the belt conveyor so that the rope 2 does not interfere with the normal operation of the belt conveyor.

[0057] The advantage of this design is that if the corresponding magnet 3 under the upper belt 11 does not fall off, the corresponding magnet under the lower belt 12 will also fall off. On the premise of ensuring that the rope 2 will not be broken, the magnetic sensor 4 can detect the falling of materials and the cracking of the belt in time.

[0058] Furthermore, due to the narrow frame space of the belt conveyor, it is not convenient to quickly reset the magnet 3 after the rope 2 and the magnet 3 are separated from the magnetic sensor 4 or the magnetic seat 52. Therefore, the present invention also includes a magnet resetter 7 for assisting the magnet to quickly reset.

[0059] like Figures 4 to 14 As shown, the magnet resetter 7 includes two reset rods 71 ​​arranged parallel to each other, the two reset rods 71 ​​are hollow and transitionally connected by a fixed handle 72; a slider 74 is slidably arranged inside the end of the reset rod 71 away from the fixed handle 72, and an adjusting wheel 77 is rotatably arranged outside the end of the reset rod 71 away from the fixed handle 72, and a guide groove 771 with a spiral structure is arranged on the surface of the adjusting wheel 77, and a driving plug 741 extending to the outside of the reset rod 71 is arranged on the slider 74, and the driving plug 741 is inserted into the guide groove 771; an adjusting handle 73 for driving the slider 74 to move is also arranged between the two reset rods 71, and an elastic member for resetting the slider 74 is also arranged in the reset rod 71; a buckle claw 78 is also fixed on the rotating shaft of the adjusting wheel 77.

[0060] As a specific implementation method, Figures 11 to 13 As shown, the adjusting handle 73 and the slider 74 are transitionally connected via a connecting rod 75. The adjusting handle 73 is arranged directly between the two reset rods 71 ​​and close to the fixed handle 72. Both ends of the adjusting handle 73 extend to the inside of the two reset rods 71 ​​respectively. One end of the connecting rod 75 is fixedly connected to the corresponding slider 74, and the other end of the connecting rod 75 is fixedly connected to the adjusting handle 73.

[0061] As a specific implementation, the adjusting wheel 77 is rotatably disposed on the reset rod 71 via a shaft seat 711 .

[0062] It should be noted that the reset rod 71 is provided with an escape opening for the adjustment handle 73 and the drive plug 741 to pass through and slide. The avoidance opening is designed to prevent the adjustment handle 73 or the drive plug 741 from interfering with the reset rod 71 when moving. The above design belongs to the adaptive design of the prior art, and the specific setting method will not be described in detail.

[0063] As a specific implementation, the elastic member is a spring 76, a limit seat 712 is provided inside the reset rod 71 and between the adjustment handle 73 and the slider 74, and the spring 76 is provided between the limit seat 712 and the slider 74. By driving the adjustment handle 73 to move toward the fixed handle 72, the adjustment handle 73 drives the slider 74 and the driving plug 741 to move through the connecting rod 75, and the adjustment wheel 77 rotates under the driving force of the driving plug 741 and the guiding action of the guide groove 771, and finally the adjustment wheel 77 rotates with the buckle claw 78 until the buckle claw 78 fits the outer wall of the reset rod 71, and the claw mouth of the buckle claw 78 is closed.

[0064] Preferably, in this embodiment, Fig. 9 and Fig.10 As shown, the pawl 78 is configured to be an arc-shaped structure, and the claw opening of the pawl 78 rotates to the side wall of the reset rod 71 , and the claw opening of the pawl 78 completely fits with the side wall of the reset rod 71 .

[0065] In this embodiment, when not subject to external force, the spring 76 is in a naturally extended state, and the claw 78 is away from the reset rod 71. When the adjusting handle 73 is driven by an external force to move the claw 78, the spring 76 is compressed. After the external force is removed, the adjusting handle 73 and the claw 78 are reset under the elastic force of the spring 76.

[0066] When using, Figures 5 to 8 As shown, when resetting the magnet 3, the operator first stands on the side of the belt conveyor away from the magnetic sensor 4, then holds the magnet resetter 7, and puts the fallen rope 2 into the claw 78. The operator then drives the claw 78 to rotate by adjusting the handle 73 and makes it close to the side of the reset rod 71. At this time, the claw mouth of the claw 78 is blocked by the side of the reset rod 71, and the rope 2 cannot fall off from the claw 78. Then, the operator moves the magnet resetter 7 to make the claw 78 close to the corresponding magnetic sensor 4 or magnetic seat 52. During the movement of the magnet resetter 7, the claw 78 gradually approaches the magnet 3 until it contacts the corresponding magnet 3. At this time, the corresponding magnet 3 just contacts the corresponding magnetic sensor 4 or magnetic seat 52, and the magnet 3 is reset.

[0067] In this embodiment, the claw opening area of ​​the clasp 78 is smaller than the area of ​​one side of the connection end of the magnet 3 and the rope 2, ensuring that the magnet 3 will not fall off from the claw opening of the clasp 78 during the resetting process.

[0068] After the magnet 3 is reset, the operator cancels the driving force on the adjusting handle 73, and under the elastic force of the spring 76, the claw 78 is opened and reset. After the claw 78 is opened, the rope 2 is separated from the claw 78 through the claw mouth of the claw 78, and finally the magnet resetter 7 is retracted.

[0069] It should be noted that when resetting a magnet 3, it is only necessary to put the rope 2 at one end of the corresponding magnet 3 that has fallen off into a claw 78 to reset it. When the magnets at both ends of a rope 2 fall off, it is necessary to put both ends of the rope 2 into the corresponding claws 78 for reset. Since the rope 2 is movable in the claws 78, even if one claw 78 contacts the corresponding magnet 3 first, in the subsequent reset process, the claw 78 that contacts the magnet 3 first will move with the corresponding magnet 3 and adjust the position of the rope 2 in the claw 78 until the other magnet 3 contacts the corresponding claw 78 and resets to the corresponding magnetic sensor 4 or magnetic seat 52.

[0070] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A belt crack detection device for a belt conveyor, characterized in that: The invention comprises a mounting frame (5) arranged on both sides of a corresponding upper belt (11) in a belt conveyor, a rope (2) located below the upper belt (11) being arranged on the mounting frame (5), one end of the rope (2) being cooperatively connected to the mounting frame (5), and a magnet (3) being arranged on the other end of the rope (2), and a magnetic sensor (4) being arranged on the mounting frame (5), and the magnet (3) being attracted to one side of the magnetic sensor (4) by magnetic force; The magnetic sensor (4) adopts a Hall element, which is fixed on a mounting frame (5) via a metal shell that can be attracted by magnets, and the Hall element is electrically connected to a circuit breaker that controls the belt conveyor via a controller; Both ends of the rope (2) are connected to magnets (3), and the magnets (3) at both ends of the rope (2) are matched and connected to magnetic sensors (4); one end of the rope (2) is arranged below the upper belt (11) and is adsorbed on the corresponding magnetic sensor (4) through the corresponding magnet (3), and the other end of the rope (2) is arranged below the corresponding lower belt (12) in the belt conveyor and is adsorbed on the corresponding magnetic sensor (4) through the corresponding magnet (3), and the middle section of the rope (2) is guided and arranged through a fixed pulley (6); It also comprises a magnet resetter (7), the magnet resetter (7) comprising two reset rods (71) arranged parallel to each other, the two reset rods (71) being hollow and transitionally connected via a fixed handle (72); a slider (74) being slidably disposed inside one end of the reset rod (71) away from the fixed handle (72), an adjusting wheel (77) being rotatably disposed outside one end of the reset rod (71) away from the fixed handle (72), a guide groove (771) having a spiral structure being disposed on the surface of the adjusting wheel (77), a driving plug (741) extending to the outside of the reset rod (71) being disposed on the slider (74), the driving plug (741) being inserted into the guide groove (771); an adjusting handle (73) for driving the slider (74) to move is also disposed between the two reset rods (71), an elastic member for resetting the slider (74) is also disposed inside the reset rod (71); a buckle claw (78) is also fixed on the rotating shaft of the adjusting wheel (77); The adjusting handle (73) and the sliding block (74) are transitionally connected via a connecting rod (75); the adjusting handle (73) is arranged directly between the two reset rods (71) and close to the fixed handle (72); both ends of the adjusting handle (73) extend into the interior of the two reset rods (71), one end of the connecting rod (75) is fixedly connected to the corresponding sliding block (74), and the other end of the connecting rod (75) is fixedly connected to the adjusting handle (73).

2. A belt crack detection device for a belt conveyor according to claim 1, characterized in that: The adjusting wheel (77) is rotatably disposed on the reset rod (71) via a shaft seat (711).

3. The belt crack detection device for a belt conveyor according to claim 1, characterized in that: The elastic member is a spring (76), a limit seat (712) is provided inside the reset rod (71) and between the adjustment handle (73) and the slider (74), and the spring (76) is provided between the limit seat (712) and the slider (74).

4. The belt crack detection device for a belt conveyor according to claim 1, characterized in that: The pawl (78) is configured to be an arc-shaped structure, and the claw opening of the pawl (78) is rotated to the side wall of the reset rod (71), and the claw opening of the pawl (78) is completely in contact with the side wall of the reset rod (71).

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