Belt servo automatic deviation adjusting device

Abstract

The application relates to a belt servo automatic deviation adjusting device, which comprises a belt left side diffuse reflection switch and a belt left side original diffuse reflection switch arranged on the left side of the belt and a belt right side diffuse reflection switch and a belt right side original diffuse reflection switch arranged on the right side of the belt; a servo motor set is used for driving the left and right movement of a supporting roller of the belt; and an air curtain protection mechanism is used for forming an air barrier on the light irradiation path between the diffuse reflection switch and the belt; the servo driver and the shaft process operation of the PLC programmable controller are used for accurately adjusting and positioning; the application utilizes the non-contact diffuse reflection sensor switch and selects a model capable of sensing the black color belt with poor emission, and the device has high stability; the air curtain protection mechanism is arranged, the air barrier is formed on the light irradiation path between the diffuse reflection switch and the belt, the diffuse reflection sensor switch is greatly reduced in interference from dust and oil stains, and the possibility of light path attenuation is reduced.

Description

Technical Field

[0001] This invention relates to a belt servo automatic belt alignment device, belonging to the field of belt alignment technology. Background Technology

[0002] There are two types of automatic belt alignment devices in the existing technology: non-powered automatic alignment idlers and electro-hydraulic automatic alignment devices. Among them, the non-powered automatic belt alignment idler has a limited adjustment range. It is suitable for specific conveyor belt widths and angles, and different adjustment methods may be required for different specifications of conveyor belts, increasing the complexity of use. In addition, the alignment accuracy is low, the alignment is unreliable, and it causes wear to the belt during operation. Electro-hydraulic automatic alignment devices have a high failure rate. Hydraulic systems typically operate under high pressure, making them prone to leaks in pipes, connectors, and seals. This can not only cause environmental pollution but also impair the system's efficiency and lifespan, potentially leading to equipment damage. Furthermore, maintenance is difficult. Hydraulic systems require regular maintenance and upkeep, including oil changes, filter cleaning, and hydraulic station overhauls. These tasks demand specialized skills and tools, and troubleshooting also requires considerable expertise and experience.

[0003] Against this backdrop, the technical challenge of how to precisely adjust the belt to the degree of belt misalignment down to the 0.5 mm level and achieve accurate belt misalignment adjustment is an urgent problem to be solved. At the same time, during the detection process, the sensor signal is easily affected by dust / oil, which can cause optical path attenuation and lead to false triggering of the sensor signal. Summary of the Invention

[0004] The purpose of this invention is to provide a belt servo automatic belt alignment device to solve the problems mentioned in the background art.

[0005] The technical solution of the present invention is as follows: A belt servo automatic belt alignment device includes: A diffuse reflection switch on the left side of the belt and a diffuse reflection switch at the origin on the left side of the belt are provided, and a diffuse reflection switch on the right side of the belt and a diffuse reflection switch at the origin on the right side of the belt are provided. A servo motor assembly is used to drive the idler rollers carrying the belt to move left and right. When the belt deviates, the servo motor assembly is driven to return to the origin slowly. An air curtain protection mechanism is used to form an air barrier in the light path between the diffuse reflection switch and the belt.

[0006] Preferably, the servo motor assembly uses a PLC programmable controller to program the axis motion control program, which sends pulse control signals to the servo driver. The servo driver controls the speed and position of the servo motor assembly according to the pulse signals; the belt is black.

[0007] Preferably, the air curtain protection mechanism includes a lower plate and multiple sets of single-line air nozzles arranged in a ring array on the lower plate.

[0008] Preferably, the lower plate is rotatably connected to the upper plate, and the upper plate has an arc-shaped groove bent radially; the straight nozzle moves radially on the lower plate via a corresponding second slider, and the second slider moves and engages within the arc-shaped groove.

[0009] Preferably, the single-piece air nozzle is rotatably connected to the corresponding second slider via a gear. The second slider is provided with a reset spring for driving the gear to rotate and reset. The end of the arc-shaped groove away from the axis of the upper plate is provided with an arc-shaped rack for meshing with the gear.

[0010] Preferably, the idler roller includes a main idler roller and side idler rollers that are mirror-symmetrically and inclinedly 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 the bracket is provided with an angle adjustment mechanism for driving the side idler roller to rotate.

[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 roller through the connecting rod. The first slider and the lead screw are threadedly connected. The lead screws in the two sets of angle adjustment mechanisms are coaxially connected as one unit.

[0013] Preferably, the angle adjustment mechanism further includes a housing, which is fixed to the middle side wall of the bracket. A turntable is rotatably connected inside the housing. Two sets of centrally symmetrical linkage rods are hinged on the turntable. A push rod is hinged to the end of each linkage rod away from the turntable. A linkage ring is provided on the push rod. The linkage ring slides linearly on the housing, approaching or moving away from the end face of a corresponding lead screw. The ends of the two sets of lead screws that are close to each other are rotatably connected to the housing. A force-applying rod that moves along its axial direction is provided inside each lead screw. A protrusion is provided on the force-applying rod. A limiting part is provided on the push rod. When the ends of the two sets of force-applying rods that are close to each other are coaxially connected, the protrusion and the limiting part cooperate to push the linkage ring to separate from the lead screw.

[0014] Preferably, the lead screw and the linkage ring are respectively provided with a first arc-shaped tooth and a second ring tooth that mesh with each other on their respective end faces; the two sets of force-applying rods are respectively provided with a third arc-shaped tooth and a fourth ring tooth that mesh with each other on their respective end faces.

[0015] The present invention has the following beneficial effects: This invention utilizes a servo driver and a PLC programmable controller for precise axis alignment and positioning, featuring advanced technology and applicability to equipment in coal-fired power plants, coal mines, and belt conveyors.

[0016] Unlike commonly used contact-type lever switches on the market, this invention utilizes 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 come into contact with the sensor, and the equipment will not experience wear or collisions due to belt deviation, resulting in high equipment stability.

[0017] This invention creates an air barrier in the light path between the diffuse reflection switch and the belt by setting up an air curtain protection mechanism, which greatly reduces the interference of dust / oil on the diffuse reflection sensor switch and thus reduces the possibility of light path attenuation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the system of the present invention; Figure 2 This is a three-dimensional structural diagram of the assembly of the idler roller, bracket, and servo motor of the present invention. Figure 3 for Figure 2 A schematic diagram of the assembly structure of the idler rollers and brackets in the diagram; Figure 4 This is a schematic diagram of the angle adjustment mechanism of the present invention; Figure 5 This is a first schematic diagram showing the mating of the internal components of the housing of the present invention; Figure 6 This is a second schematic diagram showing the fit of the internal components of the housing of the present invention; Figure 7 This is a three-dimensional structural diagram of the air curtain protection mechanism of the present invention; Figure 8 This is a schematic diagram of the shaft return-to-origin running curve for the first process of the present invention; Figure 9 This is a schematic diagram of the shaft return-to-origin running curve for the second process of the present invention.

[0019] The reference numerals in the figure are as follows: 101. Servo driver; 102. PLC programmable controller; 103. Servo motor assembly; 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 roller; 13. Side bracket; 14. Side idler roller; 15. Angle adjustment mechanism; 16. Air curtain protection mechanism; 151. First slider; 152. Connecting rod; 153. Lead screw; 154. Housing; 155. Turntable; 156. Linkage rod; 157. Push rod; 1571. Limiting part; 158. Linkage ring; 159. Force application rod; 1591. Protrusion; 161. Lower plate; 162. Upper plate; 163. Arc-shaped slide; 164. Second slider; 165. Gear; 166. Straight nozzle; 167. Arc-shaped rack. Detailed Implementation

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

[0021] Example: Belt servo automatic alignment device, such as Figure 1 As shown: The belt 107 is supported on the idler roller.

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

[0023] It also includes a servo driver 101, a PLC programmable controller 102, a servo motor assembly 103, and cables 108. The left side diffuse reflection switch 104-1, the left side origin diffuse reflection switch 104-2, the right side diffuse reflection switch 105-1, and the right side origin diffuse reflection switch 105-2 are connected to the PLC programmable controller 102 via their respective cables 108. The PLC programmable controller 102 can be an S7-1500 programmable controller. The servo motor assembly 103 can be a servo motor driven screw transmission structure. The PLC programmable controller 102 drives the servo driver 101 based on the degree of belt deviation sensed by the diffuse reflection switches, and controls the torque, acceleration curve, and deceleration curve of the servo motor in the servo motor assembly 103, so that the idler roller moves left and right to achieve the function of automatic deviation adjustment.

[0024] The main principle is to program the process axis motion control program into the PLC programmable controller 102, and send pulse control signals to the servo driver 101. The servo driver 101 precisely controls the speed and position of the servo motor assembly 103 according to the pulse signals. When the belt 107 deviates and causes the diffuse reflection switch 104-1 on the left side of the belt to activate, the servo motor assembly 103 is driven to push the idler roller according to the following... Figure 8 The process axis running curve shown is slowly running back to the origin, with the diffuse reflection switch 104-2 on the left side of the belt as the origin. When belt 107 deviates from its designated path, causing diffuse reflection switch 105-1 on the right side of the belt to activate, the servo motor assembly 103 drives the idler rollers according to the process axis. Figure 9 The running curve shown indicates a slow return to the origin. At this time, with the right side of the belt and the diffuse reflection switch 105-2 as the origin, the PLC's process axis returns to the origin with very precise control in terms of speed and position, with an error of ±1mm, and the adjustment effect is very obvious.

[0025] Example 2: Contains all the contents of Example 1, except that: Figure 2 , Figure 3 and Figure 7 As shown: It also includes an air curtain protection mechanism 16, which has two sets, one on the left and one on the right of the belt 107. The air curtain protection mechanism 16 on the left is used to generate an air curtain, so that the space between the diffuse reflection switch 104-1 on the left side of the belt, the diffuse reflection switch 104-2 at the origin on the left side of the belt and the edge of the belt 107 forms an air barrier; the air curtain protection mechanism 16 on the right side is similar and will not be described in detail.

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

[0027] The lower plate 161 has a ring array of multiple sets of second sliders 164. The second sliders 164 move radially in a straight line relative to the lower plate 161. A gear 165 is rotatably connected to the second slider 164 via a hollow cylinder. The rotation range of the gear 165 relative to the second slider 164 is 0°-180°. A straight nozzle 166 is provided on the top of the gear 165. The straight nozzle 166 is connected to an external positive pressure air source through a hose. The straight nozzle 166 sprays out a straight airflow, and the length of the airflow increases the further away from the straight nozzle 166.

[0028] The upper plate 162 has multiple sets of arc-shaped grooves 163 arranged in a ring array. The arc-shaped grooves 163 extend outward from the center of the upper plate 162 in an arc shape. The arc-shaped grooves 163 and the second slider 164 are used in a one-to-one correspondence. The outer contour of the hollow cylinder is adapted to the inner cavity of the arc-shaped groove 163. A return spring is provided between the gear 165 and the second slider 164. The return spring can be a torsion spring. The elastic force of the return spring pushes the slotted air nozzle 166 to rotate to its normal position. Figure 7 As shown, the straight nozzle 166 is radially positioned relative to the upper plate 162 at this time.

[0029] An arc-shaped rack 167 is provided at the outer end of the upper plate 162 near the arc-shaped slide groove 163 (away from the center of the upper plate 162), and the arc-shaped rack 167 meshes with the gear 165.

[0030] Working principle: Under normal circumstances, such as Figure 7 As shown, multiple sets of straight air nozzles 166 near the center of the upper plate 162 converge to increase air volume, which helps to blow away dust in the space between the diffuse reflection switch and the edge of the belt 107. Then, the motor rotates, causing the upper plate 162 to rotate relative to the lower plate 161. During this process, the straight air nozzles 166 move outward through the cooperation of the second slider 164, the hollow cylinder on the second slider 164, and the arc-shaped groove 163, until the gear 165 meshes with the corresponding arc-shaped rack 167, so that the straight air nozzles 166 rotate relative to each other at a certain angle to be perpendicular to the radial direction of the upper plate 162. At this time, the airflow ejected by the multiple sets of straight air nozzles 166 in a ring array forms an air barrier, thereby surrounding the light emitted by the diffuse reflection switch and preventing it from being affected by external dust.

[0031] Example 3: Includes all the content of Example 1 or 2, the difference being: as follows Figures 2-6 As shown: The servo motor assembly 103 is used to drive the linear movement of the bracket 1. The main bracket 11 is fixedly installed in the middle of the bracket 1, and the 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 a force application rod 159; The first slider 151 has two sets located on the left and right sides 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 of the side bracket 13. The housing 154 is fixed in the middle of the bracket 1. The lead screw 153 has two sets located on the left and right sides of the bracket 1 and 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 first slider 151 corresponding to it.

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

[0033] like Figure 5 As shown, the turntable 155 is rotatably connected inside the housing 154. Two sets of linkage rods 156 are centrally symmetrical about the axis of the turntable 155. One end of each linkage rod 156 is hinged to the turntable 155, and the other end is hinged to a corresponding push rod 157. A linkage ring 158 is fixedly mounted on each push rod 157. The linkage ring 158 is coaxially arranged with respect to the lead screw 153 and moves along the axial direction of the lead screw 153 on the housing 154. A compression spring is provided between the two sets of linkage rods 156, and the elastic force of the compression spring pushes the two sets of push rods 157 away from each other.

[0034] The end faces of the linkage ring 158 and the lead screw 153 that are close to each other are respectively provided with a first arc-shaped tooth and a second ring tooth that mesh with each other.

[0035] The lead screw 153 has a hollow interior design to house the force-applying rod 159. The force-applying rod 159 moves axially relative to the lead screw 153. The outer end of the force-applying rod 159 extends outside the lead screw 153 for user control, and the inner end of the force-applying rod 159 passes through the linkage ring 158 and extends into the housing 154. Figure 6 As shown, the inner end faces of the two sets of force-applying rods 159 that are close to each other are respectively provided with a third arc-shaped tooth and a fourth ring tooth that mesh with each other, the side wall of the push rod 157 is provided with a limiting part 1571, and the outer side wall of the force-applying rod 159 is provided with a protrusion 1591.

[0036] Working principle: Under normal conditions, the linkage ring 158 abuts against the end face of the lead screw 153 under the elastic force of the compression spring. At this time, the first arc-shaped tooth and the second ring tooth are in a meshing state, thereby fixing the lead screw 153 and the linkage ring 158 in the circumferential direction, thus avoiding the swaying of the side bracket 13 angle caused by the movement of the first slider 151 under normal conditions.

[0037] An external force is applied to push the force-applying rod 159 inward, causing the third arc-shaped teeth and the fourth ring teeth on the inner end faces of the two sets of force-applying rods 159 to engage. During this process, the protrusion 1591 and the limiting part 1571 cooperate to push the push rod 157 inward, causing the second ring tooth of the linkage ring 158 to separate from the first ring tooth of the lead screw 153. During this process, the turntable 155 and the two sets of push rods 157 cooperate to ensure that the two sets of lead screws 153 are in the same state at the same time. Then, the two sets of force-applying rods 159, which are fixedly connected by the third arc-shaped teeth and the fourth ring teeth, synchronously drive the two sets of lead screws 153 to rotate synchronously. The synchronous rotation of the two sets of lead screws 153 drives the two sets of first sliders 151 to move synchronously in opposite directions, thereby ensuring that the two sets of side brackets 13 are always in a symmetrical state.

[0038] The above description is merely an embodiment of the present invention and does not limit the scope of the patent of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A belt servo automatic alignment device, characterized in that, include: The belt left diffuse reflection switch (104-1) and belt left origin diffuse reflection switch (104-2) are set on the left side of the belt (107), and the belt right diffuse reflection switch (105-1) and belt right origin diffuse reflection switch (105-2) are set on the right side of the belt (107). Servo motor assembly (103) is used to drive the idler roller of the carrying belt (107) to move left and right. When the belt (107) deviates, the servo motor assembly (103) is driven to return to the origin slowly. An air curtain protection mechanism (16) is used to form an air barrier in the light path between the diffuse reflection switch and the belt (107); The air curtain protection mechanism (16) includes a lower plate (161) and multiple sets of ring arrays of single-line air nozzles (166) arranged on the lower plate (161). The lower plate (161) is coaxially rotatably connected to the upper plate (162), and the upper plate (162) is radially curved with an arc groove (163); the straight nozzle (166) moves radially on the lower plate (161) through the corresponding second slider (164), and the second slider (164) moves and cooperates within the arc groove (163).

2. The belt servo automatic alignment device as described in claim 1, characterized in that: The servo motor assembly (103) uses a PLC programmable controller (102) to program the process axis motion control program and send pulse control signals to the servo driver (101). The servo driver (101) controls the speed and position of the servo motor assembly (103) according to the pulse signals. The belt (107) is black.

3. The belt servo automatic alignment device as described in claim 1, characterized in that: The single-line air nozzle (166) is rotatably connected to the corresponding second slider (164) via a gear (165). The second slider (164) is provided with a reset spring for driving the gear (165) to rotate and reset. The end of the arc groove (163) away from the axis of the upper plate (162) is provided with an arc rack (167) for meshing with the gear (165).

4. The belt servo automatic alignment device as described in claim 1, characterized in that: The idler rollers include a main idler roller (12) and side idler rollers (14) that are mirror-symmetrically inclined on the left and right sides of the main idler roller (12).

5. The belt servo automatic alignment device as described in claim 4, characterized in that: The main roller (12) is rotatably connected to the main bracket (11), and the side roller (14) is rotatably connected to the corresponding side bracket (13). The main bracket (11) is fixed to the bracket (1), and one end of the side roller (14) is hinged to the bracket (1). The bracket (1) is provided with an angle adjustment mechanism (15) for driving the side roller (14) to rotate.

6. The belt servo automatic alignment device as described in claim 5, 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 roller (14) through the connecting rod (152). The first slider (151) and the lead screw (153) are threadedly connected. The lead screws (153) in the two sets of angle adjustment mechanisms (15) are coaxially connected as one unit.

7. The belt servo automatic alignment device as described in claim 6, characterized in that: The angle adjustment mechanism (15) further includes a housing (154), which is fixed to the middle side wall of the bracket (1). A turntable (155) is rotatably connected inside the housing (154). Two sets of centrally symmetrical linkage rods (156) are hinged on the turntable (155). A push rod (157) is hinged to the end of the linkage rod (156) away from the turntable (155). A linkage ring (158) is provided on the push rod (157). The linkage ring (158) slides linearly on the housing (154) towards or away from the corresponding wire. The two sets of lead screws (153) are rotatably connected to the housing (154) at one end close to each other. The lead screw (153) is provided with a force-applying rod (159) that moves along its axial direction. The force-applying rod (159) is provided with a protrusion (1591). The push rod (157) is provided with a limiting part (1571). When the two sets of force-applying rods (159) are coaxially connected at one end close to each other, the protrusion (1591) and the limiting part (1571) work together to push the linkage ring (158) to separate from the lead screw (153).

8. The belt servo automatic alignment device as described in claim 7, characterized in that: The lead screw (153) and the linkage ring (158) are respectively provided with a first arc-shaped tooth and a second ring tooth that mesh with each other on their respective end faces; the two sets of force-applying rods (159) are respectively provided with a third arc-shaped tooth and a fourth ring tooth that mesh with each other on their respective end faces.

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