Belt servo automatic deviation adjusting device

Abstract

The invention relates to a belt servo automatic deviation adjusting device which comprises a belt left side diffuse reflection switch and a belt left side original point diffuse reflection switch which are arranged on the left side of a belt, and a belt right side diffuse reflection switch and a belt right side original point diffuse reflection switch which are arranged on the right side of the belt. The servo motor set sleeve is used for driving a carrier roller bearing a belt to move left and right. The air curtain protection mechanism is used for forming an air barrier on a light irradiation path between the diffuse reflection switch and the belt. The shaft process operation of the servo driver and the PLC is used for being matched with precise deviation adjusting and positioning, a non-contact diffuse reflection sensor switch is used, the model of a black belt capable of sensing poor emissivity is selected, and the equipment stability is high. By arranging the air curtain protection mechanism, an air barrier is formed on a light irradiation path between the diffuse reflection switch and the belt, so that the interference of dust / oil dirt on the diffuse reflection sensor switch is greatly reduced, and the possibility of light path attenuation is reduced.

Description

Technical Field

[0001] The present invention relates to a belt servo automatic deviation rectifying device, belonging to the technical field of belt deviation rectification. Background Art

[0002] There are two types of belt automatic deviation rectifying devices in the prior art: the unpowered automatic deviation rectifying idler and the electro-hydraulic automatic deviation rectifying device; Among them, the deviation rectifying range of the unpowered automatic deviation rectifying idler is limited. It is applicable to specific conveyor belt widths and angles, and different adjustment methods may be required for conveyor belts of different specifications, increasing the complexity of use. Moreover, the deviation rectifying accuracy is low, the deviation rectifying is unreliable, and it wears the running belt; The electro-hydraulic automatic deviation rectifying device has a high failure rate. The hydraulic system usually works under high pressure, and parts such as oil pipes, connectors, and seals are prone to leakage, which may not only cause environmental pollution, but also damage the working efficiency and life of the hydraulic system, and even may cause equipment damage. Moreover, the maintenance difficulty is high. The hydraulic system needs regular maintenance and upkeep, including work such as oil product replacement, filter element cleaning, and overhaul of the hydraulic station. These works require special techniques and tools, and troubleshooting also requires certain techniques and experience.

[0003] Under this background, how to accurately adjust the belt at the 0.5 mm level according to the degree of belt deviation to achieve the function of accurate belt deviation rectification is a technical problem to be solved urgently; at the same time, during the detection process, the sensor signal is easily interfered by dust / oil stains, resulting in optical path attenuation, and then causing mis-triggering of the sensor signal. Summary of the Invention

[0004] The purpose of the present invention is to provide a belt servo automatic deviation rectifying device to solve the problems raised in the above background art.

[0005] The technical solution of the present invention is as follows: A belt servo automatic deviation rectifying device includes: A left belt diffuse reflection switch and a left belt origin diffuse reflection switch arranged on the left side of the belt, and a right belt diffuse reflection switch and a right belt origin diffuse reflection switch arranged on the right side of the belt; A servo motor set sleeve, which is used to drive the idler supporting the belt to move left and right. When the belt deviates, it drives the servo motor set sleeve to run slowly back to the origin; An air curtain protection mechanism, which is used to form an air barrier on the light irradiation path between the diffuse reflection switch and the belt.

[0006] Preferably, the servo motor set is programmed with a motion control program for the process axis by a PLC programmable controller to send a pulse control signal to the servo driver, and the servo driver controls the speed and position of the servo motor set according to the pulse signal; the belt is preferably black in color.

[0007] Preferably, the air curtain protection mechanism includes a lower disc and a plurality of linear air nozzles arranged in an annular array on the lower disc.

[0008] Preferably, an upper disc is rotatably connected coaxially on the lower disc, and an arc-shaped groove is radially curved on the upper disc; the linear air nozzle moves radially on the lower disc through a corresponding second slider, and the second slider is movably fitted in the arc-shaped groove.

[0009] Preferably, the linear air nozzle is rotatably connected to the corresponding second slider through a gear, a return spring for driving the gear to rotate and reset is arranged on the second slider, and an arc-shaped rack for meshing with the gear is arranged at one end of the arc-shaped groove away from the axis of the upper disc.

[0010] Preferably, the idler roller includes a main idler roller and side idler rollers symmetrically and obliquely arranged on the left and right sides of the main idler roller.

[0011] Preferably, the main idler roller is rotatably connected to the main bracket, the side idler roller is rotatably connected to the corresponding side bracket, the main bracket is fixed to the bracket, one end of the side idler roller is hinged to the bracket, and an angle adjustment mechanism for driving the side idler roller to rotate is arranged on the bracket.

[0012] Preferably, the angle adjustment mechanism includes a first slider, a connecting rod and a lead screw. The first slider is linearly slidably connected to the bracket. The first slider is connected to the side idler roller through the connecting rod. The first slider is in threaded connection with the lead screw; the lead screws in the two groups of angle adjustment mechanisms are coaxially integrated.

[0013] Preferably, the angle adjustment mechanism further includes a housing. The housing is fixed to the side wall of the middle part of the bracket. A turntable is rotatably connected in the housing. Two groups of centrally symmetric link rods are hinged on the turntable. A push rod is hinged at the end of the link rod away from the turntable. A linkage ring is arranged on the push rod. The linkage ring linearly slides on the housing to approach or move away from the end face of the corresponding lead screw. One ends of the two lead screws close to each other are rotatably connected to the housing. A force application rod axially movable along the lead screw is arranged inside the lead screw. A convex part is arranged on the force application rod. A limiting part is arranged on the push rod. When one ends of the two force application rods close to each other are coaxially integrated, the convex part and the limiting part cooperate to push the linkage ring to separate from the lead screw.

[0014] Preferably, the end faces of the lead screw and the linkage ring close to each other are respectively provided with a first arc tooth and a second annular tooth that mesh with each other; the ends of the two sets of force application rods close to each other are respectively provided with a third arc tooth and a fourth annular tooth that mesh with each other.

[0015] The present invention has the following beneficial effects: The present invention uses the shaft process operation of a servo driver and a PLC programmable controller to precisely adjust the deviation and position, with high technical content, and can be applied to equipment such as coal-fired power plants, coal mines, and belt conveyors.

[0016] Different from the commonly used contact type lever switches on the market, the present invention uses a non-contact diffuse reflection sensor switch and selects a model that can sense black belts with poor emissivity. When the belt deviates, it will not touch the sensor, and the equipment will not be worn or collided due to belt deviation, so the equipment has high stability.

[0017] The present invention forms an air barrier in the light irradiation path between the diffuse reflection switch and the belt by setting an air curtain protection mechanism, which greatly reduces the interference of the diffuse reflection sensor switch by dust / oil, thereby reducing the possibility of optical path attenuation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the system schematic diagram of the present invention; Figure 2 is the three-dimensional structure schematic diagram of the idler, bracket and servo motor set of the present invention; Figure 3 is Figure 2 the schematic diagram of the idler and bracket matching structure in Figure 4 is the schematic diagram of the angle adjustment mechanism structure of the present invention; Figure 5 is the first schematic diagram of the internal component matching of the housing of the present invention; Figure 6 is the second schematic diagram of the internal component matching of the housing of the present invention; Figure 7 is the three-dimensional structure schematic diagram of the air curtain protection mechanism of the present invention; Figure 8 is the first process shaft return to origin operation curve schematic diagram of the present invention; Figure 9 is the second process shaft return to origin operation curve schematic diagram of the present invention.

[0019] The reference numerals in the drawings are represented as: 101. Servo driver; 102. PLC programmable logic controller; 103. Servo motor set; 104-1. Belt left diffuse reflection switch; 104-2. Belt left origin diffuse reflection switch; 105-1. Belt right diffuse reflection switch; 105-2. Belt right origin diffuse reflection switch; 107. Belt; 108. Cable; 1. Bracket; 11. Main bracket; 12. Main idler; 13. Side bracket; 14. Side idler; 15. Angle adjustment mechanism; 16. Air curtain protection mechanism; 151. First slider; 152. Link; 153. Lead screw; 154. Housing; 155. Turntable; 156. Linking rod; 157. Push rod; 1571. Limiting part; 158. Linking ring; 159. Force application rod; 1591. Protruding part; 161. Lower disc; 162. Upper disc; 163. Arc-shaped chute; 164. Second slider; 165. Gear; 166. Linear air nozzle; 167. Arc-shaped rack. Detailed implementation mode

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Embodiment: The belt servo automatic deviation correction device is as Figure 1 shown: The belt 107 is carried on the idlers.

[0022] The diffuse reflection switches include a belt left diffuse reflection switch 104-1, a belt left origin diffuse reflection switch 104-2, a belt right diffuse reflection switch 105-1, and a belt right origin diffuse reflection switch 105-2; the belt left diffuse reflection switch 104-1 and the belt left origin diffuse reflection switch 104-2 are arranged on the left side of the belt 107, and the belt right diffuse reflection switch 105-1 and the belt right origin diffuse reflection switch 105-2 are arranged on the right side of the belt 107.

[0023] It also includes a servo driver 101, a PLC programmable logic controller 102, a servo motor set 103, and a cable 108. The left belt diffuse reflection switch 104-1, the left belt origin diffuse reflection switch 104-2, the right belt diffuse reflection switch 105-1, and the right belt origin diffuse reflection switch 105-2 are connected to the PLC programmable logic controller 102 through their respective cables 108. The PLC programmable logic controller 102 can adopt an S7-1500 programmable logic controller, and the servo motor set 103 can adopt a lead screw drive structure driven by a servo motor. The PLC programmable logic controller 102 senses the deviation degree of the belt 107 through the diffuse reflection switch, and then drives the servo driver 101 to control the torque, acceleration curve, and deceleration curve of the servo motor in the servo motor set 103, so that the idler moves left and right to achieve the function of automatic deviation adjustment.

[0024] The main principle is to program the motion control program of the process axis for the PLC programmable logic controller 102, and send a pulse control signal to the servo driver 101. The servo driver 101 accurately controls the speed and position of the servo motor set 103 according to the pulse signal. When the belt 107 deviates and the left belt diffuse reflection switch 104-1 is activated, the servo motor set 103 is driven to push the idler to run slowly back to the origin according to the process axis operation curve as Figure 8 shown, and at this time, the left belt origin diffuse reflection switch 104-2 is used as the origin. When the belt 107 deviates and the right belt diffuse reflection switch 105-1 is activated, the servo motor set 103 is driven to push the idler to run slowly back to the origin according to the process axis operation curve as Figure 9 shown, and at this time, the right belt origin diffuse reflection switch 105-2 is used as the origin. The process axis of the PLC runs back to the origin with very accurate control in terms of speed and position, and the error reaches ±1mm, and the adjustment effect is very obvious.

[0025] Embodiment 2: It includes all the contents of Embodiment 1, and the differences are as follows: As Figure 2 、 Figure 3 and Figure 7 shown: It also includes an air curtain protection mechanism 16. There are two groups of air curtain protection mechanisms 16, which are respectively on the left and right sides of the belt 107. The left air curtain protection mechanism 16 is used to generate an air curtain, so that an air barrier is formed in the space between the left belt diffuse reflection switch 104-1, the left belt origin diffuse reflection switch 104-2 and the edge of the belt 107. The right air curtain protection mechanism 16 will not be elaborated here for the same reason.

[0026] The air curtain protection mechanism 16 includes a coaxial lower disk 161 and an upper disk 162. The lower disk 161 is fixedly arranged relative to the side bracket 13, and the upper disk 162 is rotatably connected to the top of the lower disk 161. A motor is installed on the lower disk 161, and the output end of the motor is coaxially connected to the upper disk 162.

[0027] There are multiple groups of second sliders 164 arranged in a circular array on the lower disk 161. The second sliders 164 move linearly along the radial direction relative to the lower disk 161. A gear 165 is rotatably connected to the second sliders 164 through a hollow cylinder. The rotation range of the gear 165 relative to the second sliders 164 is 0° - 180°. A linear air nozzle 166 is provided at the top of the gear 165. The linear air nozzle 166 is connected to an external positive pressure air source through a hose; the linear air nozzle 166 ejects a linear airflow, and the length of the airflow becomes longer as it is farther away from the linear air nozzle 166.

[0028] Multiple groups of arc-shaped sliding grooves 163 are arranged in a circular array on the upper disk 162. The arc-shaped sliding grooves 163 extend in a curved arc from the center of the upper disk 162 outward. The arc-shaped sliding grooves 163 and the second sliders 164 are used in one-to-one correspondence. The outer contour of the hollow cylinder is adapted to the inner cavity of the arc-shaped sliding grooves 163, and a return spring is provided between the gear 165 and the second sliders 164. The return spring can be a torsion spring. The elastic force of the return spring is used to push the linear air nozzle 166 to rotate to the normal state as Figure 7 shown. At this time, the linear air nozzle 166 is radially arranged relative to the upper disk 162.

[0029] An arc-shaped rack 167 is provided at a position on the upper disk 162 near the outer end of the arc-shaped sliding groove 163 (away from the center of the upper disk 162). The arc-shaped rack 167 meshes and cooperates with the gear 165.

[0030] Working principle: Under normal conditions, as Figure 7 shown, multiple groups of linear air nozzles 166 near the center of the upper disk 162 gather together to increase the air volume, which is beneficial to blowing away the dust in the space between the diffuse reflection switch and the edge of the belt 107. Then, the motor rotates to drive the upper disk 162 to rotate relative to the lower disk 161. During this process, the linear air nozzle 166 is driven to move outward through the cooperation of the second slider 164, the hollow cylinder on the second slider 164, and the arc-shaped sliding groove 163 until the gear 165 meshes and cooperates with the corresponding arc-shaped rack 167, causing the linear air nozzle 166 to rotate a certain angle relative to the radial direction of the upper disk 162 to be perpendicular to the radial direction of the upper disk 162. At this time, the airflow ejected by multiple groups of linear air nozzles 166 arranged in a linear ring array cooperate to form an air barrier, thereby surrounding the light emitted by the diffuse reflection switch and avoiding being affected by external dust.

[0031] Embodiment 3: It includes all the contents of Embodiment 1 or 2, and the difference is that: as Figures 2 - 6 shown: The servo motor set 103 is used to drive the bracket 1 to move linearly. A main bracket 11 is fixedly arranged in the middle of the bracket 1. Side brackets 13 are symmetrically arranged on the left and right sides of the bracket 1. One end of the side bracket 13 is hinged to the bracket 1; The angle adjustment mechanism 15 includes a first slider 151, a connecting rod 152, a lead screw 153, a housing 154, a turntable 155, a linkage rod 156, a push rod 157, a linkage ring 158, and an actuating rod 159; There are two sets of first sliders 151 located at the left and right parts of the bracket 1 respectively. The first slider 151 is linearly slidably connected to the bracket 1. The two ends of the connecting rod 152 are respectively hinged to the first slider 151 and the middle part of the side bracket 13. The housing 154 is fixed to the middle part of the bracket 1. There are two sets of lead screws 153 located at the left and right parts of the bracket 1 and on the opposite sides of the housing 154, and the thread directions of the two sets of lead screws 153 are opposite. One end of the lead screw 153 is rotatably connected to the housing 154, and the lead screw 153 is threadedly connected to the corresponding first slider 151.

[0032] Thus, the rotation of the lead screw 153 drives the first slider 151 to linearly slide on the bracket 1, and drives the side bracket 13 to rotate relative to the bracket 1 through the connecting rod 152 to achieve angle adjustment.

[0033] As Figure 5 shown, the turntable 155 is rotatably connected inside the housing 154. There are two sets of linkage rods 156 which are centrosymmetric about the axis of the turntable 155. One end of the linkage rod 156 is hinged to the turntable 155, and the other end of the linkage rod 156 is hinged to the corresponding push rod 157. A linkage ring 158 is fixedly arranged on the push rod 157. The linkage ring 158 is coaxially arranged relative to the lead screw 153, and the linkage ring 158 is movably matched with the housing 154 along the axial direction of the lead screw 153. And a compression spring is arranged between the two sets of linkage rods 156, and the elastic force of the compression spring pushes the two sets of push rods 157 to tend to move away from each other.

[0034] On the end faces of the mutually approaching sides of the linkage ring 158 and the lead screw 153, a first arc tooth and a second annular tooth which are meshed with each other are respectively arranged.

[0035] The inside of the lead screw 153 is designed to be hollow and is used to place the actuating rod 159. The actuating rod 159 is movably matched with the lead screw 153 along the axial direction. The outer end of the actuating rod 159 extends to the outside of the lead screw 153 for the user to operate. The inner end of the actuating rod 159 passes through the linkage ring 158 and extends to the inside of the housing 154. As Figure 6 shown, on the end faces of the mutually approaching inner ends of the two sets of actuating rods 159, a third arc tooth and a fourth annular tooth which are meshed with each other are respectively arranged. A limiting part 1571 is arranged on the side wall of the push rod 157, and a protruding part 1591 is arranged on the outer side wall of the actuating rod 159.

[0036] Working principle: Under normal conditions, driven by the elastic force of the compression spring, the linkage ring 158 abuts against the end face of the lead screw 153. At this time, the first arc-shaped teeth and the second annular teeth are in a meshed state, thereby realizing the circumferential fixed setting of the lead screw 153 and the linkage ring 158, so as to avoid the shaking of the angle of the side bracket 13 caused by the movement of the first slider 151 under normal conditions.

[0037] Apply an external force to push the force-applying rod 159 to move inward, so that the third arc-shaped teeth and the fourth annular teeth on the inner end faces of the two groups of force-applying rods 159 are in a meshed state. During this process, the convex portion 1591 and the limiting portion 1571 cooperate to push the push rod 157 to move inward, so that the second annular teeth of the linkage ring 158 are separated from the first annular teeth of the lead screw 153. During this process, the cooperation of the turntable 155 and the two groups of push rods 157 enables the two groups of lead screws 153 to be in the same state at the same time; then the two groups of force-applying rods 159 fixedly connected into one body by the third arc-shaped teeth and the fourth annular teeth drive the two groups of lead screws 153 to rotate synchronously, and the synchronous rotation of the two groups of lead screws 153 drives the two groups of first sliders 151 to move synchronously in the opposite direction, so as to ensure that the two groups of side brackets 13 are always in a symmetrical state.

[0038] The above are only the embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A belt servo automatic deviation rectifying device, characterized in that Including: A left belt diffuse reflection switch (104-1) and a left belt origin diffuse reflection switch (104-2) arranged on the left side of the belt (107), and a right belt diffuse reflection switch (105-1) and a right belt origin diffuse reflection switch (105-2) arranged on the right side of the belt (107); A servo motor set (103) for driving the idler roller carrying the belt (107) to move left and right. When the belt (107) runs off track, it drives the servo motor set (103) to run slowly back to the origin; An air curtain protection mechanism (16) for forming an air barrier in the light irradiation path between the diffuse reflection switch and the belt (107).

2. The belt servo automatic deviation rectifying device according to claim 1, characterized in that: The servo motor set (103) programs the motion control program of the process axis with a PLC programmable controller (102) and emits a pulse control signal to the servo driver (101). The servo driver (101) controls the speed and position of the servo motor set (103) according to the pulse signal; the belt (107) is selected to be black.

3. The belt servo automatic deviation rectifying device according to claim 1, wherein: The air curtain protection mechanism (16) includes a lower disk (161) and multiple groups of annularly arrayed linear nozzles (166) arranged on the lower disk (161).

4. The belt servo automatic deviation rectifying device according to claim 3, characterized in that: An upper disk (162) is coaxially and rotatably connected to the lower disk (161), and an arc-shaped groove (163) is radially curved and opened on the upper disk (162); the linear nozzle (166) moves radially on the lower disk (161) through a corresponding second slider (164), and the second slider (164) is movably engaged in the arc-shaped groove (163).

5. The belt servo automatic deviation rectifying device according to claim 4, characterized in that: The linear nozzle (166) is rotatably connected to the corresponding second slider (164) through a gear (165). A return spring for driving the gear (165) to rotate and reset is arranged on the second slider (164). An arc-shaped rack (167) for meshing with the gear (165) is arranged at one end of the arc-shaped groove (163) far from the axis of the upper disk (162).

6. The belt servo automatic deviation rectifying device according to claim 1, characterized in that: The idler roller includes a main idler roller (12) and side idler rollers (14) symmetrically and obliquely arranged on the left and right sides of the main idler roller (12).

7. The belt servo automatic deviation rectifying device according to claim 6, characterized in that: The main idler roller (12) is rotatably connected to the main bracket (11), the side idler roller (14) is rotatably connected to the corresponding side bracket (13), the main bracket (11) is fixed to the bracket (1), one end of the side idler roller (14) is hinged to the bracket (1), and an angle adjustment mechanism (15) for driving the side idler roller (14) to rotate is arranged on the bracket (1).

8. The belt servo automatic deviation rectifying device according to claim 7, characterized in that: The angle adjustment mechanism (15) includes a first slider (151), a connecting rod (152) and a lead screw (153). The first slider (151) is linearly slidably connected to the bracket (1). The first slider (151) is connected to the side idler roller (14) through the connecting rod (152). The first slider (151) is in threaded connection and cooperation with the lead screw (153); the lead screws (153) in the two groups of angle adjustment mechanisms (15) are coaxially integrated.

9. The belt servo automatic deviation rectifying device according to claim 8, characterized in that: The angle adjustment mechanism (15) further includes a housing (154), the housing (154) is fixed on the middle side wall of the bracket (1), a turntable (155) is rotatably connected inside the housing (154), two sets of centrally symmetric linkage rods (156) are hinged on the turntable (155), one end of the linkage rod (156) far from the turntable (155) is hinged with a push rod (157), a linkage ring (158) is arranged on the push rod (157), the linkage ring (158) linearly slides on the housing (154) to approach or move away from the end face of the corresponding lead screw (153), one end of the two lead screws (153) close to each other is rotatably connected on the housing (154), a force application rod (159) axially movable along the lead screw (153) is arranged inside the lead screw (153), a convex portion (1591) is arranged on the force application rod (159), a limiting portion (1571) is arranged on the push rod (157), when one ends of the two force application rods (159) close to each other are coaxially integrated, the linkage ring (158) is pushed to separate from the lead screw (153) through the cooperation of the convex portion (1591) and the limiting portion (1571).

10. The belt servo automatic deviation rectifying device according to claim 9, wherein: The end faces of the mutually approaching sides of the lead screw (153) and the linkage ring (158) are respectively provided with a first arc-shaped tooth and a second ring-shaped tooth which are meshed with each other; the mutually approaching ends of the two force application rods (159) are respectively provided with a third arc-shaped tooth and a fourth ring-shaped tooth which are meshed with each other.

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