Overflow weir automatic adjustment device based on rigid chain transmission

Abstract

The application relates to the technical field of ore dressing, and specifically discloses a kind of overflow weir automatic adjusting device based on rigid chain drive, including: liquid level adjusting part includes transmission assembly, rack, weir plate, guide assembly;Transmission assembly includes servo motor, shaft coupling, transmission gear, bearing seat, rigid chain, transmission sprocket, driving shaft, driven shaft;Servo motor is arranged on the rack, the output shaft of servo motor is connected with the input end of shaft coupling, the output end of shaft coupling is connected with one end of driving shaft, the driving shaft and the one end of driven shaft are respectively provided with the transmission gear of coupling, the two ends of driving shaft and driven shaft are respectively rotatably connected with bearing seat, bearing seat is arranged on the rack, the two ends of driving shaft and driven shaft are also respectively provided with transmission sprocket, two transmission sprockets oppositely arranged are provided with rigid chain, rigid chain is coupled between transmission sprocket;Weir plate includes baffle, chain seat, one end of chain seat is fixedly connected on baffle, the other end is connected with rigid chain.

Description

Technical Field

[0001] This application relates to the field of mineral processing technology, specifically to an automatic adjustment device for an overflow weir based on rigid chain drive. Background Technology

[0002] An overflow weir is an adjustable-height baffle installed at the end of a washing tank or at a specific location. Currently, the overflow weirs of double-spiral trough washing machines and spiral classifiers on the market consist of multiple baffles. Adjusting the height of the overflow weir still relies on manual labor to increase or decrease the number of baffles, and this requires stopping the machine, otherwise there will be significant safety hazards.

[0003] The overflow weir of the double-spiral washing machine is located at the tail of the water tank, which is equipped with an overflow trough containing multiple baffles. During operation, the height of the overflow weir can be adjusted by changing the number of baffles, thereby adjusting the washing effect and throughput. Specifically: when the ore contains too much mud and cannot be thoroughly washed, increasing the number of baffles raises the liquid level and increases the water storage capacity, resulting in a better washing effect; when the throughput is too small, while ensuring the washing effect, reducing the number of baffles lowers the liquid level and increases the slurry flow rate, thus achieving a higher throughput.

[0004] With the rise of unmanned and intelligent factories, the demand for automated and unattended production and processing equipment is increasing. These tasks, which previously required human labor, need to be performed by automated devices. Summary of the Invention

[0005] The purpose of this application is to provide an automatic adjustment device for overflow weirs based on rigid chain drive, in order to solve the problems in the prior art.

[0006] To achieve the above objectives, this application provides an automatic overflow weir adjustment device based on rigid chain drive, comprising: a liquid level adjustment unit and a liquid level detection unit, wherein the liquid level adjustment unit is disposed on the overflow trough, and the liquid level detection unit is disposed on the water tank, wherein: The liquid level adjustment unit includes a transmission assembly, a frame, a weir plate, and a guide assembly; The transmission assembly includes a servo motor, coupling, transmission gear, bearing housing, rigid chain, transmission sprocket, drive shaft, and driven shaft; The servo motor is mounted on the frame, and its output shaft is connected to the input end of the coupling. The output end of the coupling is connected to one end of the drive shaft. One end of the drive shaft and the driven shaft are respectively provided with coupled transmission gears. Both ends of the drive shaft and the driven shaft are respectively rotatably connected to the bearing housing. The bearing housing is mounted on the frame, and both ends of the drive shaft and the driven shaft are also respectively provided with transmission sprockets. The two opposite transmission sprockets are provided with rigid chains, and the rigid chains are coupled to the transmission sprockets. The weir plate includes a baffle and a chain seat. One end of the chain seat is fixedly connected to the baffle, and the other end is connected to the rigid chain.

[0007] Optionally, each set of rigid chains consists of two flexible chains, which are rigid when engaged.

[0008] Optionally, a chain guide rail is provided inside the frame, and the flexible chain is disposed in the chain guide rail.

[0009] Optionally, the guide assembly includes a chute disposed within the overflow groove, and the two sides of the chain seat are disposed within the chute.

[0010] Optionally, the guide assembly further includes: a limiting plate, a sealing strip, and a pressure strip, wherein, The limiting plate is provided with a slot, and the weir plate is installed in the slot; The limiting plate is installed inside the overflow tank, with one end connected to the outside of the rear baffle of the water tank and located below the lowest liquid level. The limiting plate and the rear baffle of the water tank form a dam. The sealing strip is located below the limiting plate, and the pressure strip is located below the sealing strip.

[0011] Optionally, the guide assembly further includes a bolt group that connects the limiting plate, the sealing strip, and the pressure strip.

[0012] Optionally, the liquid level detection unit includes: a support, a liquid level gauge, a guide rail, a liquid level pointer, a float, and a guide rod, wherein, The support is mounted on the water tank, the guide rail is mounted on the support, the liquid level pointer is mounted on the guide rod, the guide rod is mounted inside the guide rail, the float is mounted at the end of the guide rod, and the liquid level gauge is mounted on the support and parallel to the guide rod.

[0013] Optionally, the liquid level detection unit further includes: an upper limit switch and a lower limit switch, wherein, The upper limit switch and the lower limit switch are respectively set at the upper and lower ends of the liquid level gauge, and the liquid level pointer is located between the upper limit switch and the lower limit switch.

[0014] The embodiments of this application have the following advantages: 1. The aforementioned automatic overflow weir adjustment device is a device that integrates mechanical and electrical components and is centrally controlled by the ore washing machine control system, providing hardware support for equipment automation and intelligence; 2. Reduced manual operation and lowered safety hazards; 3. The rigid chain power transmission has advantages over precision components such as hydraulic cylinders, air cylinders, lead screws, and electric push rods in harsh environments. It is more adaptable to harsh environments such as high dust, high humidity, and water, and is stable and reliable. 4. The overflow weir height can be adjusted in real time, reducing downtime. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 A front view of an automatic overflow weir adjustment device based on rigid chain drive, provided for at least one embodiment of this application; Figure 2 A side view of an automatic overflow weir adjustment device based on rigid chain drive, provided for at least one embodiment of this application; Figure 3 A top view of an automatic overflow weir adjustment device based on rigid chain drive, provided for at least one embodiment of this application; Figure 4 A schematic diagram of a low liquid level for an automatic overflow weir adjustment device based on rigid chain drive, provided for at least one embodiment of this application; Figure 5 A schematic diagram of the liquid level adjustment section of an automatic overflow weir adjustment device based on rigid chain drive, provided for at least one embodiment of this application; Figure 6 A schematic diagram of the liquid level detection section of an automatic overflow weir adjustment device based on rigid chain drive, provided for at least one embodiment of this application; Figure 7 A schematic diagram of the transmission assembly of an automatic adjustment device for an overflow weir based on rigid chain drive, provided for at least one embodiment of this application; Figure 8 A partially enlarged view of the liquid level adjustment section of an automatic overflow weir adjustment device based on rigid chain drive, provided for at least one embodiment of this application.

[0017] Explanation of reference numerals in the attached figures: Liquid level adjustment unit 1, liquid level detection unit 2, overflow tank 3, water tank 4, frame 11, transmission assembly 12, weir plate 13, guide assembly 14, servo motor 121, coupling 122, transmission gear 123, bearing seat 124, rigid chain 125, transmission sprocket 126, drive shaft 127, driven shaft 128, baffle 131, chain seat 132, slide 141, bolt group 142, limit plate 143, sealing strip 144, pressure strip 145, support 21, lower limit switch 22, liquid level gauge 23, upper limit switch 24, guide rail 25, liquid level pointer 26, float ball 28, guide rod 27. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0020] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0021] This application provides an automatic adjustment device for an overflow weir based on rigid chain drive, referring to... Figures 1 to 8 It includes: a liquid level adjustment unit 1 and a liquid level detection unit 2. The liquid level adjustment unit 1 is disposed on the overflow tank 3, and the liquid level detection unit 2 is disposed on the water tank 4.

[0022] like Figure 5 As shown, the liquid level adjustment unit 1 includes a frame 11, a transmission assembly 12, a weir plate 13, and a guide assembly 14.

[0023] like Figure 5 , Figure 7 As shown, the transmission assembly 12 includes a servo motor 121, a coupling 122, a transmission gear 123, a bearing housing 124, a rigid chain 125, a transmission sprocket 126, a drive shaft 127, and a driven shaft 128.

[0024] like Figure 5 , Figure 7 As shown, the servo motor 121 is the power source of the liquid level adjustment unit 1, providing power for precise control of the height of the weir plate 13; the coupling 122 is used to connect the servo motor 121 and the drive shaft 127, transmitting power to the drive shaft 127; there are two transmission gears 123, which have the same module and number of teeth, enabling the drive shaft 127 and the driven shaft 128 to have the same number of rotations during transmission; the bearing seat 124 is used to support the drive shaft 127 and the driven shaft 128; the rigid chain 125 consists of two flexible chains forming a set. Each chain has flexible characteristics, and the two chains have rigid characteristics after meshing, showing no significant bending deformation under force. In this example, two sets of rigid chains are used to drive the weir plate 13. The transmission sprocket 126 is used to drive the chain to achieve chain meshing and disengagement, thereby realizing the rigid-flexible conversion of the chain. In this example, the chain above the drive sprocket 126 is flexible, requiring a chain guide rail within the frame 11 to provide a stable motion trajectory for the flexible chain. The chain below the drive sprocket 126 is rigid and can only move in a straight line along the output direction. The rigid chain 125 requires two drive sprockets with the same pitch and number of teeth. The drive shaft 127 transmits power to one set of drive sprockets; the driven shaft 128, via the drive gear, transmits power to the other set of drive sprockets.

[0025] like Figure 1 , Figure 3 , Figure 5 As shown, the frame 11 is used to support the transmission assembly 12. The frame 11 is mounted on the overflow trough 3 to ensure the stable operation of the transmission assembly 12. like Figure 5 As shown, the weir plate 13 includes a baffle 131 and a chain seat 132. The baffle 131 is the actuator of the automatic adjustment device for overflow weirs, and the slurry level is determined by the position of the baffle 131. One end of the chain seat 132 is fixed to the baffle 131, and the other end is connected to the rigid chain 125, so that the weir plate 13 can receive the power of the transmission assembly 12.

[0026] like Figure 5 , Figure 8As shown, the guide assembly 14 includes a chute 141, a bolt group 142, a limiting plate 143, a sealing strip 144, and a pressure strip 145. The chute 141 is welded within the overflow trough 3, serving as an installation and positioning component for the weir plate 13, ensuring that the weir plate 13 has a fixed running trajectory. The bolt group 142 is used to install the sealing strip 144; the limiting plate 143 has a slot, and the weir plate 13 is installed within the slot. The limiting plate 143 is welded within the overflow trough 3, with one end welded to the outside of the rear baffle of the water tank 4, located below the lowest liquid level, forming a weir with the rear baffle of the water tank 4; the sealing strip 144 is installed on the limiting plate 143 to ensure that the slurry does not leak here; the pressure strip 145 is used to fix the sealing strip 144.

[0027] like Figure 6 As shown, the liquid level detection unit 2 includes a support 21, a lower limit switch 22, a liquid level gauge 23, an upper limit switch 24, a guide rail 25, a liquid level pointer 26, a float ball 28, and a guide rod 27.

[0028] like Figure 1 , Figure 4 , Figure 6 As shown, the support 21 is fixed on the water tank 4 to support the various actuators of the liquid level detection unit 1; the lower limit switch 22 is used to control the minimum liquid level of the overflow weir. When the slurry liquid level is at the minimum level, the liquid level pointer 26 touches the lower limit switch 22, at which point the control system no longer controls the weir plate 13 to continue moving downward; the liquid level gauge 23 is used to indicate the liquid level height, and a sensor can also be configured on the liquid level gauge 23 to transmit the liquid level height to the control center in real time; the upper limit switch 24 is used to control the minimum liquid level of the overflow weir. At a high liquid level, when the slurry level is at its highest level, the liquid level pointer 26 touches the upper limit switch 24, at which point the control system no longer controls the weir plate to continue moving upwards; the guide rail 25 is fixed on the support 21, providing a stable trajectory for the float 28; the liquid level pointer 26 is fixed on the guide rod 27 and moves together with the guide rod 27; the float 28 is fixed at the end of the guide rod 27 and performs the liquid level detection task; the guide rod 27 runs within the guide rail 25, making the float 28 run stably.

[0029] This application provides an embodiment of an automatic adjustment method for overflow weirs based on rigid chain drive, as follows: like Figure 4 As shown, the position of the weir plate 13 is typically defined as zero when it is at its lowest point, at which time the load on the servo motor 121 is minimal. To reduce the load on the servo motor 121 and extend its service life, the automatic overflow weir adjustment device requires the position of the weir plate 13 to be returned to zero when the equipment leaves the factory and when it is shut down for material supply.

[0030] When the equipment is started for production, the servo motor 121 receives instructions from the control center and will perform corresponding actions according to the instructions from the control center.

[0031] 1. Scenario 1: When the washing process is set to produce this batch of washing at the lowest liquid level, the servo motor 121 will not perform any operation. 2. Scenario 2: When the ore washing process is set to produce this batch of ore at the highest liquid level, the servo motor 121 is controlled to rotate counterclockwise. The power is transmitted to the drive shaft 127 through the coupling 122. The drive shaft 127 drives the two transmission sprockets on the drive shaft to rotate counterclockwise. At this time, the flexible chain engaged with the two transmission sprockets on the drive shaft is lifted upward. At the same time, the transmission gear on the drive shaft 127 pushes the transmission gear on the driven shaft 128 to rotate clockwise, driving the two transmission sprockets on the driven shaft to rotate clockwise. At this time, the flexible chain engaged with the two transmission sprockets on the driven shaft is lifted upward, driving the weir plate 13 to rise. When the weir plate 13 reaches the highest liquid level set by the control system, the servo motor 121 is controlled to stop rotating. 3. Scenario 3: When the washing process is set such that the liquid level of this batch of washing ore is above the minimum liquid level but below the maximum liquid level, the servo motor 121 is controlled to rotate counterclockwise. The power is transmitted to the drive shaft 127 through the coupling 122. The drive shaft 127 drives the two transmission sprockets on the drive shaft to rotate counterclockwise. At this time, the flexible chain engaged with the two transmission sprockets on the drive shaft is lifted upward. At the same time, the transmission gear on the drive shaft 127 pushes the transmission gear on the driven shaft 128 to rotate clockwise, driving the two transmission sprockets on the driven shaft to rotate clockwise. At this time, the flexible chain engaged with the two transmission sprockets on the driven shaft is lifted upward, driving the weir plate 13 to rise. When the weir plate 13 reaches the liquid level height set by the control system, the servo motor 121 is controlled to stop rotating. 4. Scenario 4: When the liquid level needs to be raised during the ore washing process, the control center issues an instruction to control the servo motor 121 to rotate counterclockwise, driving the weir plate 13 to rise. The components of the automatic overflow weir adjustment device operate according to Scenario 3. 5. Scenario 5: When the liquid level needs to be lowered during the ore washing process, the control center issues a command to control the servo motor 121 to rotate clockwise. The power is transmitted to the drive shaft 127 through the coupling 122. The drive shaft 127 drives the two transmission sprockets on the drive shaft to rotate clockwise. At this time, the chain engaged with the two transmission sprockets on the drive shaft moves downward. Simultaneously, the transmission gear on the drive shaft 127 pushes the transmission gear on the driven shaft 128 to rotate counterclockwise, driving the two transmission sprockets on the driven shaft to rotate counterclockwise. At this time, the flexible chain engaged with the two transmission sprockets on the driven shaft moves downward. At this time, the flexible chain below the transmission sprocket 126 meshes with each other, becoming a rigid chain, pushing the weir plate 13 to move downward. When the weir plate 13 reaches the liquid level height set by the control system, the servo motor 121 is controlled to stop rotating. It should be noted that due to the slurry pressure, sludge may also block the chute 141, forcing the weir plate 13 to be unable to slide down by its own gravity. 6. When the weir plate 13 is at the lowest liquid level, the automatic overflow weir adjustment device is controlled by the lower limit switch 22. If the control center gives an instruction to lower the liquid level, the control system will not execute the instruction. When the weir plate 13 is at the highest liquid level, the automatic overflow weir adjustment device is controlled by the upper limit switch 24. If the control center gives an instruction to raise the liquid level, the control system will not execute the instruction.

[0032] The relationship between the number of revolutions of the servo motor 121 and the length of the linear motion of the weir plate 13 is calculated using the number of teeth and pitch of the transmission sprocket 126.

[0033] Note that, unless otherwise explicitly stated, all features disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by alternative features for achieving the same, equivalent, or similar purpose. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features. Where used, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments, the combination of which with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment constitutes yet another embodiment.

[0034] In the implementation of functions and steps, the corresponding functions and steps in the various embodiments may occur in a different order than those shown. For example, two consecutive functions and steps may actually be executed or implemented substantially in parallel, and they may sometimes be executed or implemented in reverse order, depending on the functions involved.

[0035] Although this application has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this application fall within the scope of protection claimed in this application.

Claims

1. An automatic adjustment device for an overflow weir based on rigid chain drive, characterized in that, include: The system includes a level adjustment unit and a level detection unit, wherein the level adjustment unit is mounted on the overflow tank and the level detection unit is mounted on the water tank. The liquid level adjustment unit includes a transmission assembly, a frame, a weir plate, and a guide assembly; The transmission assembly includes a servo motor, coupling, transmission gear, bearing housing, rigid chain, transmission sprocket, drive shaft, and driven shaft; The servo motor is mounted on the frame, and its output shaft is connected to the input end of the coupling. The output end of the coupling is connected to one end of the drive shaft. One end of the drive shaft and the driven shaft are respectively provided with coupled transmission gears. Both ends of the drive shaft and the driven shaft are respectively rotatably connected to the bearing housing. The bearing housing is mounted on the frame, and both ends of the drive shaft and the driven shaft are also respectively provided with transmission sprockets. The two opposite transmission sprockets are provided with rigid chains, and the rigid chains are coupled to the transmission sprockets. The weir plate includes a baffle and a chain seat. One end of the chain seat is fixedly connected to the baffle, and the other end is connected to the rigid chain.

2. The automatic adjustment device for overflow weir based on rigid chain drive according to claim 1, characterized in that, Each set of rigid chains consists of two flexible chains, which are rigid when engaged.

3. The automatic adjustment device for overflow weir based on rigid chain drive according to claim 2, characterized in that, The frame is equipped with a chain guide rail, and the flexible chain is disposed in the chain guide rail.

4. The automatic adjustment device for overflow weir based on rigid chain drive according to claim 1, characterized in that, The guide assembly includes a slide groove disposed within the overflow groove, and the two sides of the chain seat are disposed within the slide groove.

5. The automatic adjustment device for overflow weir based on rigid chain drive according to claim 4, characterized in that, The guide assembly further includes: a limiting plate, a sealing strip, and a pressure strip, wherein... The limiting plate is provided with a slot, and the weir plate is installed in the slot; The limiting plate is installed inside the overflow tank, with one end connected to the outside of the rear baffle of the water tank and located below the lowest liquid level. The limiting plate and the rear baffle of the water tank form a dam. The sealing strip is located below the limiting plate, and the pressure strip is located below the sealing strip.

6. The automatic adjustment device for overflow weir based on rigid chain drive according to claim 5, characterized in that, The guide assembly further includes a bolt group, which connects the limiting plate, the sealing strip, and the pressure strip.

7. The automatic adjustment device for overflow weir based on rigid chain drive according to claim 1, characterized in that, The liquid level detection unit includes: a support, a liquid level gauge, a guide rail, a liquid level pointer, a float, and a guide rod, wherein... The support is mounted on the water tank, the guide rail is mounted on the support, the liquid level pointer is mounted on the guide rod, the guide rod is mounted inside the guide rail, the float is mounted at the end of the guide rod, and the liquid level gauge is mounted on the support and parallel to the guide rod.

8. The automatic adjustment device for overflow weir based on rigid chain drive according to claim 7, characterized in that, The liquid level detection unit further includes: an upper limit switch and a lower limit switch, wherein... The upper limit switch and the lower limit switch are respectively set at the upper and lower ends of the liquid level gauge, and the liquid level pointer is located between the upper limit switch and the lower limit switch.

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