WO2018160218A1 - Systèmes et procédés pour transporteur - Google Patents

Systèmes et procédés pour transporteur Download PDF

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Publication number
WO2018160218A1
WO2018160218A1 PCT/US2017/049598 US2017049598W WO2018160218A1 WO 2018160218 A1 WO2018160218 A1 WO 2018160218A1 US 2017049598 W US2017049598 W US 2017049598W WO 2018160218 A1 WO2018160218 A1 WO 2018160218A1
Authority
WO
WIPO (PCT)
Prior art keywords
conveyor surface
sensor
treatment unit
conveyor
contaminant
Prior art date
Application number
PCT/US2017/049598
Other languages
English (en)
Inventor
Andrea Andreoli
Cornelis Hensrik Mijndert MENKE
Justin Michael STEFANKO
Philip Michael GABOR
Original Assignee
Rexnord Industries, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PCT/NL2017/050127 external-priority patent/WO2017150976A1/fr
Application filed by Rexnord Industries, Llc filed Critical Rexnord Industries, Llc
Priority to US16/476,411 priority Critical patent/US11186441B2/en
Priority to CN201780087754.7A priority patent/CN110352169A/zh
Priority to EP17899125.3A priority patent/EP3589566A4/fr
Publication of WO2018160218A1 publication Critical patent/WO2018160218A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G45/00—Lubricating, cleaning, or clearing devices
    • B65G45/10—Cleaning devices
    • B65G45/24—Cleaning devices comprising plural diverse cleaning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G45/00—Lubricating, cleaning, or clearing devices
    • B65G45/10—Cleaning devices
    • B65G45/22—Cleaning devices comprising fluid applying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
    • B65G2203/02—Control or detection
    • B65G2203/0266—Control or detection relating to the load carrier(s)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
    • B65G2203/02—Control or detection
    • B65G2203/0266—Control or detection relating to the load carrier(s)
    • B65G2203/0283—Position of the load carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
    • B65G2203/04—Detection means
    • B65G2203/042—Sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
    • B65G2207/26—Hygienic features, e.g. easy to sanitize

Definitions

  • the present disclosure is described in the context of conveyor systems and methods. More specifically, the present disclosure relates to conveyor systems and methods that monitor, predict, and influence the present and predicted engagement properties imparted by the conveying surface to a conveyed product.
  • Conveyor systems operate to transport a variety of products and encompass numerous constructions.
  • a conveyor system may be composed of interdigitated plastic link modules adapted to transport beverage products within a beverage bottling plant at rapid and rapidly changing velocities and directions.
  • a conveyor system may include metallic belts adapted to transport baked goods within a bakery at a relatively uniform velocity and direction.
  • the engagement and interface between a conveying surface and the conveyed product is ideally controlled to establish a preferred interaction.
  • the frictional aspects established between the conveying surface and the conveyed product can impact various aspects of the overall process. For instance, frictional engagement outside of a preferred range (e.g., too much relative friction or too little relative friction between the conveying surface and the conveyed product) can result in damage to the conveyed product, excess wear to the conveying surface, and/or general disruption of the orderly conveyance of the conveyed product.
  • Frictional engagement outside of the preferred range can be caused by a number of different factors, such as the temperature or humidity inside the facility, lubrication exhaustion, or presence of water, cleaning solution, or contaminants on the conveying surface.
  • the market-wide transition towards lighter-weight containers with reduced wall thickness has led to a slight increase in leaking containers that emit liquid onto the conveying surface.
  • a sticky syrup residue may remain on the conveying surface, which can materially alter the frictional engagement between the conveying surface and the conveyed product.
  • This increased frictional engagement may lead to undesirable operation of the conveyor system (e.g., jamming of the conveyed product), and can lead to conveyor damage or even failure of the conveyor chains and components. If such problems arise, the conveyor may need to be shut down entirely for cleaning and repair, incurring substantial costs in time, lost production, and efficiency.
  • Some embodiments of the invention provide a method of monitoring and treating contaminants on a conveyor surface, the method comprising: monitoring the conveyor surface with at least one sensor configured to sense a condition on the conveyor surface; detecting the presence of a contaminant on the conveyor surface with the sensor; communicating the presence of the contaminant to a processor; and initiating a treatment cycle to treat the condition on the conveyor surface after the presence of the contaminant on the conveyor surface has been detected.
  • FIG. 1 A is a schematic illustration of an example conveyor system in accordance with the disclosure.
  • FIG. IB is a schematic illustration of a portion of the conveyor system of FIG. 1.
  • FIG. 2A is a schematic view of the motor and belt configuration used to drive the conveyor system of FIG. 1.
  • FIG. 2B is a schematic view of the conveyor system of FIG. 1 cleaning a detected spill area.
  • FIG. 2C is a schematic illustration of a portion of the conveyor system of FIG. 2A taken along arc 2C-2C in FIG. 2A.
  • FIG. 3 is a block diagram of an example control system that may be used in conjunction with the conveyor system of FIG. 1.
  • FIG. 4 is a flow chart of an example method in accordance with the disclosure.
  • FIG. 5 A is plot of the pH over time.
  • FIG. 5B is a plot of the coefficient of friction over time.
  • FIG. 1A is a schematic illustration of an example conveyor system 10 capable of conveying products 12 A, 12B, and monitoring, predicting, and influencing the present and predicted engagement properties imparted by a conveying surface 14 A, 14B, 14C of belt modules 16 A, 16B, 16C to the products 12 A, 12B being transported.
  • conveyor system 10 comprises a belt 1 1 (e.g., the interconnected belt modules 16A, 16B, 16C shown, a substantially continuous flat belt conveyor, a flat wire belt, etc.) driven by a motor 22.
  • each interface area 18A, 18B, 18C of engagement defined between the respective conveying surface 14A, 14B, 14C and product 12 A, 12B portion will be assumed to be uniform within the respective interface area 18 A, 18B, 18C.
  • the degree of granularity with which the engagement inquiry is made can be a function of the particular application to which the present concepts are adapted.
  • the transfer of forces between the conveying surfaces 14 A, 14B, 14C to the products 12 A, 12B can be influenced, at least in part, by interface substances 20A, 20B, 20C located at the interface areas 18A, 18B, 18C.
  • the interface substances 20A, 20B, 20C can be uniform, distinct, or some combination of substances dispersed continuously or discretely, and can include, for example, particles and/or fluids such as environmental particles and contaminants, manufacturing debris, foodstuffs, cleaning fluids, and lubricants.
  • the interface substances 20A, 20B, 20C, 20D, 20E, 20F can originate from a variety of sources, such as passively by virtue of the surrounding environment, actively in accordance with logic, and/or functionally as a result of the particular product being conveyed.
  • interface substances 20A, 20B, 20C on conveying surfaces 14A, 14B, 14C can be useful in some situations (e.g., cleaning fluids and lubricants) or can be detrimental (e.g., environmental particles and contaminants). Accordingly, in some situations it may be advantageous to remove some or all of interface substances 20A, 20B, 20C from the conveying surfaces 14A, 14B, 14C to maintain acceptable engagement properties in interface areas 18 A, 18B, 18C. For example, if a spill occurs, unwanted liquid could be present on the conveying surfaces 14A, 14B, 14C that adversely affects the operation of the conveyor system.
  • the unwanted liquid is preferably removed from the conveyor belt by treatment unit 24, discussed below.
  • interface substances 20A, 20B, 20C may be necessary for satisfactory operation of the conveyor system 10.
  • conveyor lubricant may be necessary to allow the belt 1 1 to continue operating properly in the conveyor system 10. If a less than satisfactory amount of lubricant is detected on conveying surfaces 14A, 14B, 14C, the treatment unit 24 (or a separate lubricant dispensing device (not shown)) may dispense a lubricant composition to introduce additional lubrication into the conveyor system 10, in a manner similar to that disclosed in International Publication Number WO 2015/020524, the contents of which are hereby incorporated by reference in their entirety.
  • one or more sensors 26 are placed about the conveyor system 10 that can detect the presence of certain unwanted interface substances 20A, 20B, 20C on conveyor surfaces 14A, 14B, 14C.
  • one or more pH sensors 26 can be configured to monitor conveyor belt 1 1. Such a sensor 26 may be particularly advantageous for use in the beverage industry, as the contents contained within beverage containers are typically acidic in nature.
  • pH sensor 26 could readily detect that a spill has occurred, and could communicate to the central processing unit (“CPU") 28 a time stamp for when the spill was detected and the exact location of the spill, such that a controller 25 in communication with CPU 28 can communicate to the treatment unit 24 that the spilled liquid must be addressed and belt 1 1 must be treated.
  • optical sensors 26 may be used. Such sensors 26 can actively monitor the belt for discoloration caused by the presence of liquid or other contaminants, as will be discussed in more detail below.
  • various types of other sensors 26 may be utilized, such as drag sensors, friction sensors, belt temperature sensors in combination with ambient temperature sensors, relative humidity sensors, lubrication sensors, cleaning solution sensors, and the like.
  • image processing can be employed to determine the relative friction between, for example, product 12B and belt module 16C by capturing the relative position of the product 12B over time and determining an average change in velocity and/or acceleration, which can be correlated to a present and a desired frictional engagement between the product 12B and the belt module 16C.
  • the one or more sensors 26 in conveyor system 10 are stationary relative to the belt 11, and are configured to detect the presence of interface substances 20A, 20B, 20C, 20D, 20E, 20F on conveyor surfaces 14A, 14B, 14C as they pass through the sensor regions of interest.
  • the one or more sensors in conveyor system 10 can be integrally molded within conveyor surfaces 14A, 14B, 14C, and can be configured to translate in concert with conveyor belt 11 as it moves about conveyor system 10.
  • the one or more sensors 26 may be otherwise coupled to conveyor surfaces 14A, 14B, 14C, such that they are constantly monitoring the same conveyor surface 14A, 14B, 14C during the operation of conveyor system 10.
  • the one or more sensors 26 can be provided with sampling rates such that a sensing cycle occurs about once every second, once every five seconds, once every ten seconds, or at sampling speeds faster or slower yet. Additionally, it should be appreciated that different sampling rates may be used for different types of sensors. Accordingly, in some embodiments the sampling rate amongst sensors 26 present in the conveyor system 10 may differ from sensor to sensor.
  • the conveyor system 10 may initiate a treatment process to address the substance.
  • the treatment process may involve locating the specific location of a detected interface substance 20 A, 20B, 20C, 20D, 20E, 20F on conveyor surfaces 14 A, 14B, 14C and treating only those locations and their immediately surrounding areas.
  • the type and positioning of the sensors relative to conveying surfaces 14A, 14B, 14C may determine the processes necessary to accurately and efficiently perform the aforementioned interface substance treatment process.
  • each sensor 26 can be assigned a specific locational value along the conveyor system 10.
  • each sensor 26 may be assigned a locational value corresponding with the distance that sensor is positioned away from the treatment unit 24, which can be fixed at a specific location in the conveyor system 10.
  • each sensor 26 may be configured to communicate to a central processing unit 28 when an unwanted or unexpected interface substance 20A, 20B, 20C, 20D, 20E, 20F is detected on conveyor surfaces 14A, 14B, 14C.
  • each sensor 26 may be configured to communicate to the central processing unit 28 after every measurement taken, and the central processing unit 28 may evaluate each measurement to determine whether action is necessary (immediately or at an approximate future time), for instance, to remove an identified interface substance 20A, 20B, 20C or otherwise impact the frictional engagement properties between the conveying surfaces 14A, 14B, 14C and the products 12 A, 12B.
  • Each sensor 26 may be programmed to communicate its specific position relative to the treatment unit 24, the exact time the measurement was taken, and the measurement value obtained by the sensor 26 to the central processing unit 28.
  • the central processing unit 28 can identify the exact time the conveying surface 14A, 14B, 14C containing interface substance 20A, 20B, 20C will next be within range of the treatment unit 24, and can communicate to controller 25 to activate the treatment unit 24 to remove the substance.
  • conveyor system 10 transporting bottles 12A, 12B.
  • motor 22 drives a belt 11 in conveyor system 10.
  • Motor 22 can be controlled by central processing unit 28 to output a specific, constant motor shaft speed (in RPM).
  • the output shaft of the motor 22 can be coupled to a drive wheel, which can engage conveyor belt driving surface 15.
  • the drive wheel rotates at the speed of the motor shaft, friction between the drive wheel and driving surface 15 produces no- slip contact between the components, which produces constant conveyor surface 14A, 14B, 14C translation constrained and controlled by belt rollers 16A, 16B, 16C.
  • conveyor system 10 comprises an endless belt 11 having a finite overall length. Because no-slip contact occurs or can be approximated between the drive wheel and the conveyor belt driving surface 15, the rate of conveyor belt 11 displacement can be readily calculated by knowing the motor speed and drive wheel dimensions. By also knowing the distance away from the cleaning unit 24 and overall length of the conveyor belt 11, the predicted time can be calculated for when a portion of the conveyor belt will be located directly at the treatment unit 24, which can then remove unwanted interface substances 20A, 20B, 20C detected at a specific area.
  • a stationary sensor 26 detects that an unwanted interface substance 20A, 20B, 20C is present on a conveying surface 14A, 14B, 14C at location X on the conveyor belt 11.
  • the sensor 26 may then communicate to the central processing unit 28 that a measurement outside of the acceptable range has been detected, and may similarly provide a time stamp for when the measurement occurred and the distance D of the sensor from/to the treatment unit 24.
  • the conveyor belt 11 is an endless belt having a finite length L, location X on the conveyor belt 11 will eventually rotate until it is located directly under the treatment unit 24.
  • quantity N is the ratio of drive wheel circumference to belt length, which can be easily calculated by knowing the diameter of the drive wheel and length of the belt.
  • the angular velocity ⁇ of the motor 22 corresponds to the motor shaft speed which can be controlled by the central processing unit 28.
  • treatment unit 24 can conserve treatment fluid and energy by avoiding cleaning, washing, or otherwise treating portions of conveyor surfaces 14A, 14B, 14C that do not contain any unwanted interface substances 20A, 20B, 20C. By only activating treatment unit 24 when location X is within range, treatment unit 24 uses less resources to provide an effective and targeted treatment to the conveyor system 10. In some embodiments, the treatment unit 24 is entirely passive until a sensor 26 detects an unwanted interface substance 20A, 20B, 20C present on a conveyor surface 14A, 14B, 14C, further conserving energy in the system.
  • conveyor system 10 may comprise one or more sensors 26 that are coupled to conveyor belt 11 and configured to rotate about conveyor system 10 as the conveyor belt is driven by motor 22.
  • the sensors 26 communicate with treatment unit 24 differently, as their position relative to treatment unit 24 is constantly changing as conveyor system 10 is operating.
  • the sensors 26 may be configured to communicate their positions relative to the belt at all times once an unwanted interface substance 20A, 20B, 20C has been detected.
  • Each sensor 26 may be configured with a GPS, Bluetooth, RFID, NFC, or other communication system to communicate with the central processor 28 that the sensor 26 (and unwanted interface substance) is approaching the treatment unit.
  • the sensor 26 comprises a de-energized RFID tag in a non- transmitting mode when no unwanted interface substances 20A, 20B, 20C are detected by the sensor 26. However, when the sensor 26 detects the presence of an unwanted interface substance, an energy source on the sensor 26 can re-energize the RFID tag, such that it is in a transmitting mode.
  • the treatment unit 24 can be configured with an RFID tag reader that constantly scans for matching RFID tags, and can remain passive until the RFID tag reader detects a matching key.
  • the treatment unit 24 can begin, for example, a washing cycle to remove that unwanted interface substance 20A, 20B, 20C once the RFID tag is in range of the RFID tag reader, and can similarly cease cleaning when the RFID tag is no longer detected (i.e., it is out of range).
  • Treatment unit 24 is configured to dispense fluid onto conveying surfaces 14A, 14B, 14C.
  • the treatment unit 24 is stationary relative to the conveyor system 10, and can be configured to dispense a cleaning solution onto the conveying surfaces 14A, 14B, 14C (shown in FIG. 2B).
  • treatment unit 24 may be positioned in conveying system 10 such that conveying surfaces 14 A, 14B, 14C pass underneath treatment unit 24 during operation.
  • a cleaning solution may be used that comprises water and an acidic, neutral, or alkaline concentrated cleaning agent.
  • treatment unit 24 may be configured to run multiple cycles, such as a washing cycle, a rinsing cycle, a lubrication cycle, a drying cycle, and an ultraviolet cleaning cycle.
  • the washing cycle may comprise dispensing a cleaning solution onto conveying surfaces 14A, 14B, 14C.
  • the controller 25 can communicate to the treatment unit 24 to initiate a rinsing cycle.
  • the rinsing cycle may comprise dispensing water onto the conveying surfaces 14A, 14B, 14C to remove any remaining cleaning solution and/or interface substances 20 A, 20B, 20C still present on the conveying surfaces 14 A, 14B, 14C being washed.
  • treatment unit 24 may use no cleaning solution, and instead spray only water onto the conveying surfaces 14A, 14B, 14C to remove interface substances 20A, 20B, 20C.
  • pressurized gas can also be used to remove interface substances 20A, 20B, 20C.
  • treatment unit 24 may comprise an air compressor or other pressurized gas source.
  • the treatment unit 24 may comprise a pump 30, which can be placed in fluid communication (e.g. using a hose 36) with a fluid source 32, lubrication source, and/or other sources to facilitate treatment. Using the pump 30, fluid 34 can be pressurized prior to being dispersed onto conveying surfaces 14A, 14B, 14C.
  • the pump 30 may be configured to compress fluid 34 to pressures between about five pounds per square inch to as high as about five thousand pounds per square inch, or even greater.
  • the treatment unit 24 may comprise a fluid pressure tank (not shown) which can be configured to store pressurized fluid for cleaning as well.
  • water from a water source first enters the pump, where it can be pressurized. When the water is pressurized, it can then be stored in a water pressure tank until a cleaning or rinsing cycle begins.
  • the treatment unit 24 may be configured to dispense fluid at rates as low as 0.25 gallons per minute to as high as five hundred gallons per minute, or even greater.
  • treatment unit 24 may comprise one or more dispensing heads 38.
  • the one or more dispensing heads 38 can be configured to dispense the pressurized fluid in a direction towards conveying surfaces 14A, 14B, 14C such that interface substances 20A, 20B, 20C can be successfully removed and/or the conveying surfaces 14A, 14B, 14C treated.
  • the one or more dispensing heads 38 can be configured to dispense fluid in a number of different patterns.
  • the dispensing heads 38 are configured to output fluid approximately perpendicular to the conveying surfaces 14A, 14B, 14C. In other embodiments, the dispensing heads 38 may be configured to produce a more cone-shaped fluid pattern, and may disperse fluid at an angle other than perpendicular to the conveying surfaces 14A, 14B, 14C. It will be appreciated that any number of different fluid patterns can be produced by the one or more dispensing heads and remain entirely within the scope of the present disclosure.
  • the treatment unit 24 may further comprise a drying component (not shown), which can be configured to, for instance, dry a portion of conveying surfaces 14 A, 14B, 14C after a wash and/or rinse cycle has been performed.
  • the drying component may utilize a blower, fan, heat, compressed air source, steam, or any combination of these drying mechanisms.
  • the drying component can be configured to direct compressed air at a high velocity towards conveying surfaces 14A, 14B, 14C.
  • the high velocity air can serve to both dry and displace liquid that remains from any wash and/or rinse cycle that was performed, and can similarly act to displace or remove interface substances 20A, 20B, 20C that might remain on conveying surfaces 14A, 14B, 14C.
  • a heating element and a blower can be used in conjunction with one another.
  • the air can be passed over the heating element to the blower, which can be configured to direct the heated air (or other gas) towards conveying surfaces 14A, 14B, 14C.
  • the velocity of air or other gas can displace water, cleaning solution, or other interface substances 20A, 20B, 20C from conveying surfaces 14A, 14B, 14C, while heat from the air can evaporate at least a portion of the remaining liquids present on conveying surfaces 14A, 14B, 14C.
  • the drying component is placed in electrical communication with a controller 25 that is configured to activate the drying component only after a washing or rinsing cycle has been performed, which can help avoid excess energy consumption.
  • conveyor system 10 comprises a steam cleaning unit that utilizes compressed water vapor to quickly clean, dry, and sanitize conveying surfaces 14A, 14B, 14C of conveyor belt 11.
  • the treatment unit 24 may further comprise a boiler and an insulated tank to heat and store the compressed water vapor for cleaning.
  • abrasive scrubbing units may be utilized to help complete a cleaning cycle. Abrasive cylinder brushes may be selectively introduced to conveying surfaces 14 A, 14B, 14C depending upon the detection of an unwanted material at a specific location on conveyor belt 11.
  • an abrasive cylinder brush may be positioned away from conveyor belt 11 when no unwanted interface substances 20A, 20B, 20C are detected by any of the one or more sensors 26 in conveyor system 10.
  • a controller 25 may communicate to an actuator to lower the cylinder brush to a position where it then contacts the conveyor belt 11.
  • friction between the bristles of the brush and the conveyor belt cause the cylinder brush to rotate, thereby causing the brush to selectively remove material present on the conveyor belt.
  • the cylinder brush may be placed in communication with a motor that causes the cylinder brush to rotate in a direction opposing the direction of conveyor belt travel, and may act to remove contaminants by having helically-oriented bristles.
  • the controller 25 can communicate to the actuator to return the cylinder brush to a position away from conveyor belt 11. In some embodiments, the controller 25 may also cause the cylinder brush motor to cease operation once the cylinder brush is returned to a position away from the conveyor belt 11.
  • treatment unit 24 may comprise both a pressurized fluid dispenser and an abrasive scrubbing unit.
  • the treatment unit 24 may further comprise a drying component.
  • the treatment unit 24 may comprise a steam cleaning unit and an abrasive scrubbing unit.
  • the treatment unit may comprise both a pressurized cleaning fluid dispenser and a steam cleaning unit.
  • some embodiments of the present disclosure may comprise a pressurized fluid dispenser, a steam cleaning unit, and an abrasive scrubbing unit to fully effect a cleaning process.
  • Sensors 26 may be placed in electrical communication with a controller 25 that can implement a treatment process when, for instance, an unwanted interface substance is detected by a sensor 26 or the engagement between the conveying surfaces 14A, 14B, 14C and the products 12A, 12B is not presently within expectations or is predicted to become undesirable in practice.
  • the controller 25 may be programmed with machine readable instructions, such as a program for implementing the rinsing, cleaning, or drying cycles discussed in more detail below and shown in FIG. 4.
  • the program may be executed by a processor 102 such as CPU 28.
  • the program may be stored on a tangible computer readable storage medium such as a CD-ROM, floppy disk, hard drive, digital versatile disk (DVD), Blu-ray disk, or a memory associated with the CPU 28.
  • a tangible computer readable storage medium such as a CD-ROM, floppy disk, hard drive, digital versatile disk (DVD), Blu-ray disk, or a memory associated with the CPU 28.
  • the entire program or parts thereof could be executed by a device other than CPU 28, and may be instead embodied in firmware or dedicated hardware.
  • the example program discussed with reference to FIG. 4 is provided in a specific order, it should be appreciated that many other methods of implementing the example controller program may alternatively be used. For example, the order of execution of the steps may be changed, or some of the steps discussed may be altered, eliminated, or combined.
  • the example conveyor operating process 200 shown in FIG. 4 may be implemented using coded instructions (computer readable instructions, for example) stored on a tangible computer readable storage medium such as a hard disk drive, flash memory, read-only memory (ROM), random access memory (RAM), compact disk (CD), digital versatile disk (DVD), cache, or any other storage device in which information can be stored for any duration of time.
  • a tangible computer readable storage medium such as a hard disk drive, flash memory, read-only memory (ROM), random access memory (RAM), compact disk (CD), digital versatile disk (DVD), cache, or any other storage device in which information can be stored for any duration of time.
  • tangible computer readable storage medium includes any type of computer readable storage device or storage disk. Additionally, it should be appreciated that "tangible computer readable storage medium” and “tangible machine readable storage medium” can be used interchangeably, and should be understood to be synonymous. Additionally or alternatively, the example conveyor operating process 200 disclosed in FIG.
  • FIG. 3 is a block diagram of an example processor platform 100 capable of executing conveyor operating process 200 of FIG. 4 by implementing the example controller of FIGS. 1 and 2.
  • the processor platform 100 can be, for example, a server, a personal computer, a mobile device (i.e., a smart phone, tablet, or cell phone), a personal digital assistant (PDA), or any other type of computing device.
  • a non-transitory computer or machine readable medium such as a hard disk drive, flash memory, read-only memory, compact disk, digital versatile disk, cache, random-access memory, or any other storage device or disk in which information may be stored for any duration of time.
  • the term non-transitory computer readable medium includes any type of computer readable storage device or disk and excludes propagating signals and transmission media.
  • FIG. 3 is a block diagram of an example processor platform 100 capable of executing conveyor operating process 200 of FIG. 4 by implementing the example controller of FIGS. 1 and 2.
  • the processor platform 100 can be, for example, a server,
  • the processor platform 100 includes a processor 102, which is illustrated as hardware. Such a processor 102 may be implemented in integrated circuits, logic circuits, microprocessors, or controllers from any desired family or manufacturer. In some embodiments, processor 102 may be similar to CPU 28, such as that described with respect to FIGS. 1A, IB, 2 A and 2B.
  • the processor 102 of the illustrated example includes a local memory 104, such as a cache.
  • the example processor 102 executes the instructions of FIG. 4 to implement the example conveyor operating process 200.
  • the processor 102 of the illustrative embodiment is in communication with a main memory including a volatile memory 106 and a non-volatile memory 108 via a bus 110.
  • the volatile memory 106 may be implemented using Synchronous Dynamic Random Access Memory (SDRAM), Dynamic Random Access Memory (DRAM), RAMBUS Dynamic Random Access Memory (RDRAM), or any other type of random access memory device.
  • the non-volatile memory 108 may be implemented by flash memory or any other type of memory suitable for use with processor 102.
  • a memory controller may be used to control volatile memory 106 and non-volatile memory 108.
  • the processor platform 100 shown in FIG. 3 may also include an interface circuit 112.
  • the input device(s) 114 permit(s) a user to enter data and commands into the processor 102, which can in turn be used to control conveyor system 10.
  • the input device(s) can be implemented by a sensor, microphone, camera (still or video), keyboard, button, mouse, touchscreen, track-pad, trackball, isopoint, voice recognition system, or other input methods suitable for inputting parameters into the controller of conveyor system 10. It should be appreciated that this list of input devices is not exhaustive, and that other input devices may be used to incorporate the systems and methods of the present disclosure.
  • One or more output devices 116 may also be used in the system. In some embodiments, output devices 116 may be connected to interface circuit 112.
  • the output devices 116 may be implemented by display devices, such as a light emitting diode (LED), organic light emitting diode (OLED), liquid crystal display (LCD), cathode ray tube display (CRT), touchscreen, tactile output device, speakers, or other devices for outputting a signal.
  • the interface circuit 112 may include a graphics driver card, graphics driver chip, or a graphics driver processor to produce and display signals on such output devices 116.
  • the interface circuit 112 shown in the provided figures also includes a communication device such as a transmitter, receiver, transceiver, modem, or network interface card.
  • a communication device such as a transmitter, receiver, transceiver, modem, or network interface card.
  • Such communication devices facilitate the exchange of data with external machines, such as computing devices of any kind.
  • Such communication may occur via a network 118, such as through an Ethernet connection, a digital subscriber line (DSL), telephone line, coaxial cable, cellular telephone system, or other suitable methods of communicating and transmitting data.
  • DSL digital subscriber line
  • the processor platform 100 may also include one or more mass storage devices 120 for storing software or data.
  • mass storage device 120 may include floppy disk drives, hard disk drives, compact disk drives, Blu-ray disk drives, RAID systems, digital versatile disk (DVD) drives, or other mass storage devices 120 suitable for storing data for any period of time.
  • coded instructions 122 to implement conveyor operating process 200 of FIG. 4 may be stored in the mass storage device 120, volatile memory 106, nonvolatile memory 108, or on a removable tangible computer readable storage medium such as a CD, DVD, Blu-Ray, floppy disk, or hard disk.
  • FIG. 4 provides an example conveyor operating process 200 that may be implemented using the methods and conveyor systems 10 disclosed herein with reference to FIGS. 1 A-3. As discussed with respect to conveyor system 10, a plurality of different sensors 26 may be used to ensure continuous and improved operation of the conveyor system 10.
  • Conveyor operating process 200 may begin at block 202, where one or more sensors are actively monitoring conveyor surfaces while the conveyor belt is moving or stationary.
  • the one or more sensors may be configured to detect a number of different characteristics of the conveyor belt, and may be placed at various intervals about the conveyor belt.
  • the one or more sensors may be configured to detect a pH level on the belt, a discoloration detected on the belt, or other belt properties, such as friction, drag, temperature, level of lubricant present, level of cleaning solution present, or other desirably monitored belt qualities that preferably impact or correlate to the engagement between product and the belt.
  • the one or more sensors may be positioned stationary about the conveyor system and may be configured to detect the presence of interface substances on the conveying surfaces at different sampling frequencies as the belt moves past, allowing for nearly real-time detection and response. It should be appreciated that in some embodiments, one or more sensors are configured to travel along with the conveyor belt as it moves, and may be configured to actively monitor a single conveying surface throughout the conveyor system operation.
  • the sensors communicate to a CPU whether a substance has been detected on the conveying surfaces of the belt. If there has not been any substances detected on the conveying surfaces of the belt, the process returns to block 202, and the sensors and CPU continue to monitor the conveyor belt. If a substance has been detected, the CPU may inquire the sensor to provide the position of the sensor 206. In some embodiments, the position may be the coordinates of the specific sensor relative to a treatment unit. In other embodiments, the position may correspond to a specific location on the belt, which the CPU may then use to determine the distance between the conveying surface with substances detected and the treatment unit.
  • the CPU determines whether the substance that was detected is within range of the treatment unit. Relying on the positional data relayed by the sensors to the CPU, the CPU may calculate the projected time until the substance detected is within range of the treatment unit. If the CPU calculates that the substance is not positioned within range of the treatment unit, the CPU may again inquire the sensor to provide positional data about where the substance was detected. In some embodiments, this process can result in updated data about the location of a spill and can provide multiple measurements to the CPU to allow for an even more accurate determination of when the substance is located within range of the treatment unit. [0051] If the CPU does determine that the substance detected is within range of the treatment unit, a treatment cycle, such as a wash cycle, may be initiated at block 210.
  • a treatment cycle such as a wash cycle
  • the wash cycle may first involve powering on the treatment unit at block 212.
  • a pump in the treatment unit may be powered up when the treatment unit is powered on, and may be configured to pressurize a cleaning solution, lubrication, water, or other fluid present in a fluid reservoir.
  • the treatment unit may then expel pressurized fluid towards the conveying surface, which may act to remove the detected substance from the conveyor belt or otherwise impact the engagement properties between the product and the belt (e.g., increase or decrease relative friction).
  • the position of the detected substance relative to the treatment unit is continuously monitored at block 214, which determines whether or not the power of the treatment unit should remain on (when the detected substance is within range of the treatment unit) or should be turned off (when the detected substance is out of range of the treatment unit).
  • the position of the substance relative to the cleaning unit may once again be determined by the CPU (e.g., using equation 1 above), or could instead be monitored by sensors present within the range of the treatment unit, among other options.
  • the position of the substance may be continuously transmitted to the CPU by a sensor detecting a specific location on the belt continuously. If the substance is within range of the treatment unit, the treatment unit may remain on and may continue to dispense fluid onto the conveying surfaces of the conveyor belt.
  • the treatment unit may be powered off at block 216.
  • the treatment unit may cease to dispense cleaning fluid onto the conveying surfaces of the conveyor belt once the treatment unit has been powered off.
  • the surface of the conveyor is once again sensed at block 218.
  • the sensing process may take place via any of the one or more sensors present in the conveyor system.
  • the acceptability of the conveyor surfaces after treatment can be evaluated at process block 220. If the substances detected on the conveying surfaces of the conveyor belt are still determined to be higher than acceptable, the process may return to decision block 208, where the CPU communicates with the one or more sensors to determine whether or not the substances on the conveying surface are within range of the treatment unit.
  • the process may then optionally initiate a drying cycle at block 222, which may selectively dry the portion of the conveyor belt that was washed during the cleaning cycle. It should be appreciated, however, that the drying cycle may be omitted entirely. In some embodiments, the entire process 200 restarts after completion of the drying cycle at block 222.
  • the process 200 may be used to monitor many locations along the belt, and that each sensor may be simultaneously performing a different block of the process 200 at various times during operation of the conveyor system.
  • the CPU may be given a specific command hierarchy to ensure that treatment (e.g., washing) occurs at the proper times, and to ensure that operation of the conveyor remains properly ongoing in different blocks at different times during conveyor belt operation.
  • the one or more sensors may be configured to continue sensing the conveyor surfaces for additional substances, and may continue to repeat blocks 202 and 204 during this process.
  • a substance at another location on the conveying surface may be detected (e.g., at process block 202) to be within the range of the washer, which then requires the treatment unit to be powered on. Accordingly, the command to turn the treatment unit off at block 216 may be effectively overridden when a different substance is detected at 208 within the washer range, such that the treatment unit remains on.
  • conveyor system transports beverages and contains one or more pH sensors 26 placed along various intervals in the conveyor system 10.
  • conveyor belt 11 may maintain a pH around neutral (i.e., around 7.0), as shown between time Ot and time 2t.
  • a bottle may spill or leak some or all of its contents onto conveying surfaces 14A, 14B, 14C, as indicated in FIGS. 5A and 5B at time 2t. Because most beverages are slightly to moderately acidic in nature, an initial drop in pH occurs at the location of the spill, which is measured by the one or more pH sensors 26 present in conveyor system 10 at time 3t.
  • the frictional forces at interface areas 18A, 18B, 18C initially decrease, as the liquid present on conveying surfaces 14A, 14B, 14C acts as a lubricant between products 12A, 12B and conveying surfaces 14A, 14B, 14C. Accordingly, the frictional forces at interface areas 18 A, 18B, 18C hit a local minimum between time 2t and 3t.
  • the initial drop in pH is detected by the one or more sensors 26, which relays that signal to CPU 28 to effectuate a conveyor operating process 200 at the location where the unwanted interface substance 20A, 20B, 20C was sensed.
  • the one or more sensors 26 which detect the change in pH effectively predict that a future problem area on the conveyor belt 11 will develop, as would occur if the spill or leak was untreated.
  • the spill begins to dry at time 3t, which causes an increase in frictional force and an increase in pH.
  • the dried beverage leaves behind a sticky syrupy residue, which greatly increases the frictional forces at interface areas 18 A, 18B, 18C, at time 4t to time 5t and beyond.
  • Such increased frictional forces may cause improper engagement between conveying surfaces 14A, 14B, 14C and products 12A, 12B, which may eventually lead to jam ups of containers, container damage, or even failure of the conveyor chains, belt, or other components, and may require total conveyor system 10 shutdown.
  • one or more sensors 26 actively monitor conveyor surfaces 14A, 14B, 14C on conveyor belt 1 1 to ensure that any spilled liquid or interface substances 20A, 20B, 20C that may eventually cause frictional issues on belt 1 1 are removed before they result in undesirable operation.
  • a conveyor operating process 200 may be initiated shortly after an initial drop in pH is detected by any of the sensors 26.
  • the treatment unit 24 may remain passive until any of the one or more sensors 26 detects an initial contaminant present on conveying surfaces 14A, 14B, 14C.
  • Measurements taken by sensor 26 may be analyzed directly by a control unit, analyzed by an auxiliary monitoring unit, or sent to a remote location to be analyzed. If the signal is determined to contain or predict an unacceptable condition (e.g., detected contaminants, relative friction outside of a desired range, excessive rate of change in relative friction), the CPU 28 can initiate a process to remove the interface substances 20A, 20B, 20C from or otherwise treat the conveying surfaces 14A, 14B, 14C. In some embodiments, the cleaning process is initiated between time 2t and time 3t, which can be configured to provide a cleaning solution, a rinse cycle, a combination of the two, or other treatment to remove unwanted interface substance 20A, 20B, 20C from conveying surfaces 14A, 14B, 14C and establish the desired engagement properties.
  • time 2t and time 3t can be configured to provide a cleaning solution, a rinse cycle, a combination of the two, or other treatment to remove unwanted interface substance 20A, 20B, 20C from conveying surfaces 14A, 14B, 14C and establish the desired
  • the treatment unit 24 could remain in an unpowered or low power state until the unacceptable interface substance 20A, 20B, 20C is within range of the treatment unit 24.
  • CPU 28 may once again rely upon the position data provided by the sensor 26 which detected the presence of the contaminant. Using this same position data, the treatment unit 24 may also detect when the conveyor surface 14A, 14B, 14C containing the unwanted interface substance 20A, 20B, 20C has past outside the range of the treatment unit 24, at which point the treatment unit may return to a low power or unpowered state.
  • the CPU 28 may be provided with an acceptable range of pH values, such that the cleaning process continues until the one or more sensors 26 indicates that the pH present on the belt has returned within an acceptable range of values.
  • the washing and/or rinsing cycles may be terminated, and a drying cycle may begin.
  • drying cycle may begin around time 3t, when the pH is detected to be approximately neutral.
  • conveyor system 10 can actively monitor conveying surfaces 14A, 14B, 14C for unwanted interface substances 20A, 20B, 20C, and can effectively deal with any potential issues that these interface substances 20A, 20B, 20C may cause prior to the belt or transported products 12 A, 12B experiencing any catastrophic failures that require extensive system shutdown or maintenance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Conveyors (AREA)

Abstract

Selon des modes de réalisation, l'invention concerne des systèmes et des procédés pour surveiller et éliminer des contaminants d'une surface de transporteur en fonction des qualités d'engagement abrasif prévues détectées sur la surface de transporteur. Dans certains exemples, les procédés peuvent comprendre la surveillance de la surface de transporteur avec au moins un capteur configuré pour détecter un état sur la surface de transporteur. Le capteur peut détecter la présence d'un contaminant, et communiquer l'emplacement du contaminant détecté à un processeur. Un cycle de traitement peut ensuite être initié pour retirer ou déplacer le contaminant de la surface de transporteur après que la présence d'un contaminant a été détectée.
PCT/US2017/049598 2016-03-01 2017-08-31 Systèmes et procédés pour transporteur WO2018160218A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US16/476,411 US11186441B2 (en) 2016-03-01 2017-08-31 Conveyor systems and methods
CN201780087754.7A CN110352169A (zh) 2017-03-01 2017-08-31 传送机系统和方法
EP17899125.3A EP3589566A4 (fr) 2017-03-01 2017-08-31 Systèmes et procédés pour transporteur

Applications Claiming Priority (2)

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PCT/NL2017/050127 WO2017150976A1 (fr) 2016-03-01 2017-03-01 Procédé et système pour commander le coefficient de frottement entre une surface de transporteur et les produits transportés
NLPCT/NL2017/050127 2017-03-01

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WO2021182949A1 (fr) 2020-03-09 2021-09-16 Rexnord Flattop Europe B.V. Contrôle d'écoulement de transport de produit

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EP3589566A4 (fr) 2020-12-30
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