WO2020160592A1 - Pneumatic tanker - Google Patents
Pneumatic tanker Download PDFInfo
- Publication number
- WO2020160592A1 WO2020160592A1 PCT/AU2020/000012 AU2020000012W WO2020160592A1 WO 2020160592 A1 WO2020160592 A1 WO 2020160592A1 AU 2020000012 W AU2020000012 W AU 2020000012W WO 2020160592 A1 WO2020160592 A1 WO 2020160592A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- discharge
- compartment
- control system
- discharge line
- valve
- Prior art date
Links
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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/06—Gas pressure systems operating without fluidisation of the materials
- B65G53/10—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas
-
- 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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/60—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading using fluids, e.g. having direct contact between fluid and load
-
- 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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/16—Gas pressure systems operating with fluidisation of the materials
-
- 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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging 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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/50—Pneumatic 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
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
-
- 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
- B65G2812/00—Indexing codes relating to the kind or type of conveyors
- B65G2812/16—Pneumatic conveyors
- B65G2812/1608—Pneumatic conveyors for bulk material
- B65G2812/1641—Air pressure systems
- B65G2812/165—Details
-
- 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
- B65G2812/00—Indexing codes relating to the kind or type of conveyors
- B65G2812/16—Pneumatic conveyors
- B65G2812/1608—Pneumatic conveyors for bulk material
- B65G2812/1641—Air pressure systems
- B65G2812/1658—Air pressure systems with fluidisation of materials
-
- 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
- B65G2814/00—Indexing codes relating to loading or unloading articles or bulk materials
- B65G2814/03—Loading or unloading means
- B65G2814/0347—Loading or unloading means for cars or linked car-trains with individual load-carriers
- B65G2814/0352—Feeding or discharging devices operated by cars
Definitions
- the present disclosure relates to an unloading system for a container for a particulate material, and to a container for a particulate material comprising such a system.
- a container in the form of a silo and a trailer-mounted container (or tanker) comprising such a system are also disclosed.
- Pneumatic tankers are used to store and transport dry granular material, generally referred to as product.
- a typical tanker will comprise an enclosed tank, comprising at least one hopper in connection with a product pipe, which carries product from the hopper to a storage location such as a silo. Movement of the product from the hopper to the product pipe and storage location is achieved through the use of a compressed air system.
- Typical compressed air systems comprise an air compressor or blower in fluid connection with a manifold via a“hot hose”, the manifold is in fluid connection with four valves, being the“top air” valve, the “aerator” valve, the“product line” valve and the“blow down” valve.
- The“top air” valve is in fluid connection with the top of the tank, and provides air flow to the tank, capable of creating a pressure build up within the tank.
- The“aerator” valve is in fluid connection with an aeration system located within each hopper, which acts to“fluidize” the product, encouraging it to flow out of discharge valves located at the base of each hopper.
- The“product line” valve is in fluid connection with the product line, which itself is in fluid connection with the discharge valves at the base of each hopper, where the flow of air through the product line carries the product out to the product pipe.
- a system for unloading a particulate material from a container comprising a discharge system for carrying away the material from one or more compartments to a container outlet, and a control system for controlling operation of the unloading system
- the discharge system comprising a discharge valve positioned at a material outlet for each compartment to control the discharge of material from the compartment into a discharge line
- the unloading system comprising a boost line extending from a pressure feed line to the discharge line, and comprising a boost valve, the boost valve being adjustable to any desired position at or between fully open and fully closed, and adapted to provide position feedback to the control system
- the control system comprising at least one pressure sensor for the discharge line, and wherein in use the control system will monitor discharge line pressure continuously and control the boost valve in response via a feedback loop, adjusting boost valve position in response to discharge line pressure to maintain material flow in the discharge line.
- each compartment there is for each compartment a discharge line pressure sensor adjacent to the respective discharge valve, and in use, the control system monitors the discharge line pressure sensor associated with the compartment being emptied at the time.
- the unloading system will unload one compartment at a time.
- the control system further comprises a pressure sensor for each compartment, and in response to a sensed compartment pressure and the sensed discharge line pressure continuously coordinating operation of the or each discharge valve and the boost valve via a feedback loop, to control and maintain material flow in the discharge line.
- the unloading system further comprises a gas pressurisation system for pressurising a compartment or each of a plurality of compartments contained within the container, and wherein the control system coordinates operation of the gas pressurisation system and the discharge system to effect unloading.
- a container for a particulate material comprising at least one storage compartment, the or each compartment comprising a hatch for access thereto, a discharge hopper, a lowermost material outlet, the container further comprising a system for unloading the particulate material from the container (unloading system), the unloading system comprising a discharge system for carrying away the material from the or each compartment, and a control system for controlling operation of the unloading system, the discharge system comprising a discharge valve positioned at the or each material outlet to control the discharge of material from the compartment into a discharge line, the unloading system comprising a boost line extending from a pressure feed line to the discharge line, and comprising a boost valve, the boost valve being adjustable to any desired position at or between fully open and fully closed, and adapted to provide position feedback to the control system, the control system comprising at least one pressure sensor for the discharge line, and wherein in use the control system will monitor discharge line pressure continuously and control the boost valve in response
- each compartment there is for each compartment a discharge line pressure sensor adjacent to the respective discharge valve, and in use, the control system monitors the discharge line pressure sensor associated with the compartment being emptied at the time.
- the container further comprises a container vent valve under the control of the control system.
- a container vent valve under the control of the control system.
- the container is trailer-mounted, so as to be transportable.
- the container comprises a silo.
- a pneumatic tanker for a particulate material comprising at least one storage compartment, the or each compartment comprising a hatch for access thereto, a discharge hopper, a lowermost material outlet, and a system for unloading the particulate material from the container (unloading system), the unloading system comprising a discharge system for carrying away the material from the or each compartment, and a control system for controlling operation of the unloading system, the discharge system comprising a discharge valve positioned at the or each material outlet to control the discharge of material from the compartment into a discharge line, the unloading system comprising a boost line extending from a pressure feed line to the discharge line, and comprising a boost valve, the boost valve being adjustable to any desired position at or between fully open and fully closed, and adapted to provide position feedback to the control system, the control system comprising at least one pressure sensor for the discharge line, and wherein in use the control system will monitor discharge line pressure continuously and control the boost valve in response
- a silo for a particulate material comprising at least one storage compartment, the or each compartment comprising a hatch for access thereto, a discharge hopper, a lowermost material outlet, and a system for unloading the particulate material from the container (unloading system), the unloading system comprising a discharge system for carrying away the material from the or each compartment, and a control system for controlling operation of the unloading system, the discharge system comprising a discharge valve positioned at the or each material outlet to control the discharge of material from the compartment into a discharge line, the unloading system comprising a boost line extending from a pressure feed line to the discharge line, and comprising a boost valve, the boost valve being adjustable to any desired position at or between fully open and fully closed, and adapted to provide position feedback to the control system, the control system comprising at least one pressure sensor for the discharge line, and wherein in use the control system will monitor discharge line pressure continuously and control the boost valve in response
- a method of operation for the above described control system comprising the steps of continuously monitoring the pressure sensor for each compartment, and the pressure sensor for the discharge line, and in response to a sensed compartment pressure and a sensed discharge line pressure continuously coordinating operation of the discharge valve and the boost valve via a feedback loop, to control and maintain material flow in the discharge line.
- the method comprises the further step of if the discharge line pressure reaches or approaches the compartment pressure, then the control system will close the discharge valve for that compartment and open the boost valve.
- the“boost” valve is in fluid connection with atmosphere and is used to control overall pressure levels throughout the compressed air system.
- Figure 1 is a side view of a trailer-mounted container, or tanker
- Figure 2 is a schematic illustration of a control system for the unloading system of the trailer- mounted container of Figure 1;
- Figure 3 is a side view of a silo
- Figure 4 is a front end view of the silo of Figure 3;
- Figure 5 is an opposing side view of the silo of Figure 3.
- Figure 6 is a rear end view of the silo of Figure 3.
- FIG. 1 where there is illustrated a trailer-mounted container or tanker 1.
- the container comprises a shell 2, preferably of aluminium, and, in this embodiment, divides into two generally cylindrical and horizontally disposed lower product compartments which are arranged along a common horizontal axis. Each compartment is provided with a hatch 4 for access thereto, a discharge hopper 6 and a lowermost material outlet (not visible) at the bottom of the hopper 6.
- a blower or compressor is typically mounted on a tractor that is used to haul the tanker, and is connected to a pressure feed line 10 (often referred to as a hot hose) for the container via a connector 12.
- the tanker 1 could be fitted with its own blower or compressor.
- an accumulator may be employed to ensure consistency of supply.
- An unloading system is also provided for unloading the container.
- the unloading system comprises a gas pressurisation system for pressurising each of the plurality of compartments in order to aid emptying of these, and a discharge system for carrying away the product from the or each compartment to an outlet. Operation of the unloading system involves effective coordination of the pressurisation system and the discharge system.
- the discharge system comprises a discharge valve (not visible) positioned at each material outlet to control the discharge of material from compartment into a discharge line 20.
- the discharge line 20 comprises pipework extending below each discharge valve to the container outlet 22.
- a plurality of separate lines of pipework extend from the pressure feed pipe 10, so as to form a manifold with the feed pipe 10.
- An aerator line 30 extends from the feed pipe 10 to each aerator, and comprises one of the aerator valves 32 in the line.
- the aerator valve operates to control the amount of air supplied to the aerator.
- a boost line 40 extends from the pressure feed line 10 to the discharge line, and comprises a boost valve 42 in the line 40.
- the boost valve 42 operates to control the amount of air introduced to the discharge line, and comprises a position feedback function via which information regarding its position (i.e. closed and the extent to which it is open) is fed back to the control system.
- a tank vent line 50 extends from the tank to the discharge line 20, and comprises one of the tank vent valves 52 in the line, which vents to atmosphere.
- a manifold purge line 60 extends from the pressure feed pipe 10 to the discharge line, and comprises a purge valve 62 in the line.
- the purge valve 62 operates to purge the manifold when required.
- a plurality of gas pressure sensors which in this case comprise electronic gas pressure transducers, are provided. The transducers sense internal gas pressure within the compartments and sense internal gas pressures within the pressure feed line (hot hose) and the discharge line (product hose) and convert the sensed gas pressure into an electronic signal.
- a tank pressure sensor 70 to this end (and with reference to Figure 2), there is provided a tank pressure sensor 70, a manifold pressure sensor 72, a first discharge pressure sensor 74, a second discharge pressure sensor 76 and a‘control air’ pressure sensor 78.
- the unloading system further comprises a control system for controlling the operation thereof.
- the control system controls operation of the valves 32, 42, 52 and 62 in response to pressure reading feedback from the pressure sensors 70, 72, 74, 76 and 78. That is to say, the control system receives input from the pressure sensors (transducers) and then sends signals to the valves to control valve fimctions and system operation in turn.
- control system may include a variety of components.
- Exemplary components may include those that monitor electric signals, switch electric signals, perform sensing functions, and govern activation and deactivation of the valves.
- control system may comprise a processor, a memory, storage, and a user interface 80.
- the control system may be controlled by software.
- the control system may provide users with precise control, diagnostic information and performance information for governing the unloading system.
- PLC programmable logic controller
- a salient feature of the present disclosure is how the control system will monitor discharge line pressure (via discharge pressure sensors 74 and 76) continuously, adjusting an extent of boost valve 42 opening in response, to control and maintain material flow in the discharge line 20.
- a further salient feature of the present disclosure is how operation of the discharge valves and the boost valve 42 is coordinated by the control system to control discharge of the product to control and maintain material flow in the discharge line 20, and prevent and/or clear blockages.
- a user starts operation of the system such as by flipping a switch that sets the control system to work, monitoring and controlling operation of the unloading system on a near continuous basis.
- exemplary control system operation is as follows: a. Tank vent valve 52 is closed; b. Aerators are activated by the aerator valves 32; c. Pressure inside tank builds to unload pressure of approx. 140 kPa (needs to be adjustable) in 2 mins, tank pressure sensor 70 sends pressure to control system; d. When pressure in the tank reaches 140 kPa, the control system opens the boost valve 42 to 45 degrees with position feedback provided to control system from boost valve 42; e. Control system opens rear discharge valve (for the rear compartment) fully; f. Control system monitors product discharge pressure via pressure discharge sensor 76 (set point approximately 30 kPa).
- the control system will increase boost by opening the boost valve 42 further. A lower pressure will indicate reduced resistance, in this case the control system will reduce boost by closing the boost valve 42 somewhat. If the discharge pressure reaches a yet to be determined set point (approximately 60 kPa), then the control system will close the discharge valve and open the boost valve 42 to 100% (i.e. fully open) until the pressure in the discharge line reaches a set point (approximately 20 kPa) then open the discharge valve again to let product flow resume, the control system will then return to controlling the discharge pressure; g. Unloading of rear compartment takes approx. 17 mins (in this case) with pressure
- Control system monitors product discharge pressure via pressure discharge sensor 74 (set point approximately 30 kPa). If the discharge pressure shows product resistance to flow (slow flow will give a higher pressure) the control system will increase boost by opening the boost valve 42 further. A lower pressure will indicate reduced resistance, in this case the control system will reduce boost by closing the boost valve 42 somewhat. If the discharge pressure reaches a yet to be determined set point (approximately 60 kPa), then the control system will close the discharge valve and open the boost valve 42 to 100% (i.e. fully open) imtil the pressure in the discharge line reaches a set point to be determined (approximately 20 kPa) then open the discharge valve again to let product flow resume, the control system will then return to controlling the discharge pressure;
- control system When a cleanout operation is to be performed, the control system operates as follows: a. When pressure in tank reaches 140 kPa, the control system then opens the rear discharge valve (pinch valve) fully; b. Control system opens boost valve to 45 degrees position; c. When pressure drops below 100 kPa in approx. 30 seconds, the control system will close the rear discharge valve 10, seconds later the control system will close the boost valve
- control system When pressure in tank reaches 140 kPa, the control system then opens the front discharge valve (pinch valve) fully; e. Control system opens boost valve to 45 degrees position; f. When pressure drops below 100 kPa in approx. 30 seconds, then the control system will open the rear compartment discharge valve (both front and rear discharge valves are now open); g. When tank pressure drops to 15 kPa, the control system will open die tank vent valve 52; h. Control system will close both discharge valves and the boost valve 42, and open the manifold purge valve 72; i. Once all pressure sensors read zero pressure a 30 second timer will start, once timed out, control system will close all valves.
- the silo 100 differs principally in the following respects:
- a. It is larger and comprises a single internal compartment, hopper 6, discharge valve, and discharge line pressure sensor; b. It is equipped with pipework to discharge from both sides thereof; c. It comprises three aeration valves 32 at each end thereof; d. It is provided with a series of support retractable legs 110 at various positions along its length, upon which it can be stood; e. Each of the legs 1 10 comprises a load cell, via which the overall weight of the silo 100 and its load can be determined; f.
- the control system further comprises an overfill prevention feature which prevents overfilling of the silo, by shutting off inflow in response to sensing a predetermined load via the load cells.
- the unloading system for a container for a particulate material disclosed herein is able to control unloading of the product, and control and maintain material flow in the discharge line, thus preventing blockages in the discharge line, without intervention from an operator.
- a user/operator may define a volume of the particulate material for unloading from the container and set a rate of unloading, whereby both the defined volume and the rate of unloading may be set via the control system.
- the control system monitors the discharge line pressure continuously during unloading and controls the boost valve in response via the feedback loop, adjusting the boost valve position in response to advantageously maintain the set rate until the volume of the particulate material is unloaded.
- the user/operator may define a 50,000 kg volume of particulate material to be unloaded from the container and set a rate of 800 kg per minute to be unloaded via the control system, which monitors the discharge line pressure continuously to maintain the rate of 800 kg per minute until the total volume of 50,000 kg particulate material is unloaded.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2020217825A AU2020217825A1 (en) | 2019-02-07 | 2020-02-07 | Pneumatic tanker |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2019900393 | 2019-02-07 | ||
AU2019900393A AU2019900393A0 (en) | 2019-02-07 | Pneumatic tanker |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020160592A1 true WO2020160592A1 (en) | 2020-08-13 |
Family
ID=71946929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2020/000012 WO2020160592A1 (en) | 2019-02-07 | 2020-02-07 | Pneumatic tanker |
Country Status (2)
Country | Link |
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AU (1) | AU2020217825A1 (en) |
WO (1) | WO2020160592A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3876259A (en) * | 1974-02-01 | 1975-04-08 | Dynamic Air | Pneumatic booster valves for transporting hot abrasive material |
JP2524902B2 (en) * | 1991-03-14 | 1996-08-14 | 極東開発工業株式会社 | Ejection device for powder particles loaded on the vehicle |
US5855456A (en) * | 1996-10-16 | 1999-01-05 | Ultraflo Corporation | Apparatus and method for unblocking conveying pipe |
US20180178974A1 (en) * | 2016-12-23 | 2018-06-28 | David E. Sisk | Automatic unloading system for tank trailer or other bulk materials |
-
2020
- 2020-02-07 WO PCT/AU2020/000012 patent/WO2020160592A1/en active Application Filing
- 2020-02-07 AU AU2020217825A patent/AU2020217825A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3876259A (en) * | 1974-02-01 | 1975-04-08 | Dynamic Air | Pneumatic booster valves for transporting hot abrasive material |
JP2524902B2 (en) * | 1991-03-14 | 1996-08-14 | 極東開発工業株式会社 | Ejection device for powder particles loaded on the vehicle |
US5855456A (en) * | 1996-10-16 | 1999-01-05 | Ultraflo Corporation | Apparatus and method for unblocking conveying pipe |
US20180178974A1 (en) * | 2016-12-23 | 2018-06-28 | David E. Sisk | Automatic unloading system for tank trailer or other bulk materials |
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Publication number | Publication date |
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AU2020217825A1 (en) | 2021-08-19 |
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