CN111517127A - Dynamic and static interaction metering system and metering method - Google Patents
Dynamic and static interaction metering system and metering method Download PDFInfo
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- CN111517127A CN111517127A CN202010482152.5A CN202010482152A CN111517127A CN 111517127 A CN111517127 A CN 111517127A CN 202010482152 A CN202010482152 A CN 202010482152A CN 111517127 A CN111517127 A CN 111517127A
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- 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
- B65G67/00—Loading or unloading vehicles
- B65G67/60—Loading or unloading ships
- B65G67/606—Loading or unloading ships using devices specially adapted for bulk material
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- 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
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
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- 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
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/32—Filling devices
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- 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
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
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- 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
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- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
Abstract
The invention firstly provides a dynamic and static interaction metering system, which comprises: 2 and more than 2 measuring bins, wherein the measuring bins are provided with weight sensors, and bin bottom valves are arranged below the measuring bins and used for controlling the unloading or loading of materials in the measuring bins; and a feeding device, which is configured as a two-way feeding device; and a control system. The invention also provides a measuring method of the dynamic and static interaction measuring system. The invention integrates the metering functions of ship unloading and ship loading, and can be suitable for loading and unloading materials of large ship loaders and ship unloaders. The metering system has the advantages of large layout, large flow, stability, reliability, stronger adaptability, lower cost and higher efficiency; and the weighing sensor is not used for weighing and peeling once, but used for weighing between a full bin and an empty bin of the metering bin respectively to obtain an accurate weight numerical value, so that the precision is higher.
Description
Technical Field
The invention relates to a metering system, in particular to material conveying and online weighing equipment of a bulk material transfer station and a metering method of the metering system.
Background
In recent years, the development of the bulk cement industry is very rapid, and the method provides an inexhaustible opportunity for the distribution and construction of bulk cement transfer stations. Bulk cement and other materials belong to dry and scattered materials, the loading capacity of a shipping mode is larger and larger, and the flow of conveying equipment required for loading and unloading is larger and larger, so that a metering mode suitable for the process characteristics is not available at present, the weight is usually measured by a ship body water gauge, but the traditional metering mode is low in metering precision and is only suitable for the requirement of miniaturization metering.
The prior discharge metering device has a single structure, only measures the discharge weight, does not calculate the difference of the original quality of the stock bin and has lower precision, as the technical scheme disclosed by Chinese patent CN 103499378;
as also disclosed in chinese patent CN110395359, the metering method only weighs the total amount of the metering bin, but does not weigh the empty metering bin after unloading, neglects the influence of the residue after each unloading or the residue before unloading on the weight of the material, and has low precision, furthermore, the metering method cannot realize the combined work and the cycle work of a plurality of or single metering bins, does not accurately calculate the times of material conveying and unloading of the metering bins in unit time, has a large load on the machine by material conveying and unloading all the time, affects the service life of the equipment, and in addition, does not control the conveying flow (incoming material flow) and the unloading flow in the working process, cannot calculate the flows, is easy to operate in overload, forms the problems of material blockage, machine deformation, and the like, and may cause the overload work of the weighing sensor, causes the damage of the weighing sensor, affects the metering precision, and also affects the service life of other parts of the device.
And, with the great development of the sea traffic and modern logistics industry, the prior art is difficult to adapt to the actual demands. For example, the ship unloading and loading capacities required by the announcement of the ministry of industry and informatization on the printing of a < first station (set) major technical equipment popularization and application guide catalogue (2019 edition) > (the letter of industry and the ministry of correspondence [ 2019 ] 428) reach 3.5 ten thousand tons/hour and 2 ten thousand tons/hour respectively, which is sufficient for the current logistics industry, particularly the ship loading and unloading capacity of marine transportation, and is increasingly huge. See table below:
therefore, it is urgently needed to develop an on-line weighing device which has high metering precision, large flow, stability, reliability, low manufacturing cost and strong adaptability and can particularly meet the trade settlement metering requirement of the modern logistics system so as to immediately master the accurate conveying capacity or loading capacity before entering a storage warehouse after unloading or before loading after leaving the warehouse.
Disclosure of Invention
The invention aims to solve the technical problem of providing a dynamic and static interaction metering system which is suitable for loading and unloading ships, has high metering precision, large flow, low cost, strong adaptability, is more stable and reliable, and can meet the online weighing requirement of trade settlement metering.
Therefore, the invention adopts the following technical scheme:
it includes:
2 and more than 2 measuring bins, the measuring bins are provided with weight sensors, and bin bottom valves are arranged below the measuring bins and used for controlling the discharging or charging of materials in the measuring bins.
The weight sensor adopts a high-precision industrial control weighing controller, and weighing signals are transmitted to a control system, namely a PLC control cabinet, through a standard RS232/RS485 serial port in a networking manner, so that the accuracy and stability of the weighing signals are ensured; and
the feeding equipment is matched with two-way feeding equipment, the two-way feeding equipment comprises a chute conveying end for conveying more than 2 metering bins and an elevator conveying end for conveying more than 2 metering bins, the chute conveying end and the elevator conveying end are flexibly connected with the metering bins, and a material conveying valve for conveying each metering bin is arranged on the conveying end of each chute and the conveying end of the elevator, the material conveying valve can convey materials after being opened, and the materials are not conveyed after being closed, so that the invention realizes two feeding modes on each metering bin, namely chute conveying end feeding and elevator conveying end feeding, generally speaking, the feeding of the chute conveying end is directly provided by a ship unloader, the elevator conveying end is provided with the incoming material by a transfer warehouse, the incoming material diversification and the use of the metering system are more flexible, and the metering system can meet the material conveying and metering requirements of various different environments; and
the discharging equipment is arranged below the metering bin, the material enters the discharging equipment after passing through the valve, and the discharging equipment is in flexible connection with the bottom of the metering bin;
in the disclosure, the feeding equipment can be a screw conveyor on a ship unloader, can convey materials from bottom to top, can be a belt conveyor, a lifter or an air conveying groove and other conventional equipment, and the conveying capacity of the feeding equipment is matched with the capacity of the ship unloader and the ship loader; and
the control system comprises a PLC control cabinet and power supply equipment, wherein the power supply equipment can be arranged in the PLC control cabinet, and the PLC control cabinet is connected with and controls the bin bottom valve, the material conveying valve, the weight sensor and the communication assembly. The power supply apparatus includes a power cable, a control cable, and the like. The PLC control cabinet controls the operation of a material conveying valve, a bin bottom valve, feeding equipment and discharging equipment, and is in communication connection with the weight sensor module group on the metering bin; the control system also comprises a remote Ethernet switch and a plurality of Ethernet data switches, and the PLC control cabinet is connected in the Ethernet data switches. The industrial personal computer and the PLC control cabinet are arranged in the field control room, and the industrial personal computer displays each metering data and is provided with a control interface for controlling each electrical device. The PLC controller integrates a PROFINET interface, has the PROFINET bus communication function, can be used for standard TCP communication, and can realize communication and remote operation and maintenance and control by configuring TCP connection or establishing TCP connection with other equipment by using an open communication special module.
Further, the measurement bin includes the cylindrical storehouse body on upper portion and the back taper platform type material conveying mouth or the tip taper material conveying mouth that falls under the cylindrical storehouse body, and the measurement bin that highly is greater than the measurement bin that sets up back taper platform type material conveying mouth that sets up the measurement bin of tip taper material conveying mouth to adapt to the different environment of unloading, when the height of material is higher, can adopt back taper platform type material conveying mouth, when the height of material is lower, can adopt tip taper type material conveying mouth.
Meanwhile, an inflation groove is formed in the lower end portion of the inverted cone-shaped material conveying opening, materials are fluidized, and material conveying is smooth.
Furthermore, the metering system further comprises a bin body supporting part and a metering bin foundation, the bin body supporting part is arranged on the side wall above the gravity center of the bin body, the bin body supporting part is of an annular beam structure and is in an annular beam structure, the annular beam structure is directly welded or fixed on the side wall of the bin body in other fixing modes, and the annular beam structure can reduce elastic deformation of the bin body and stress points. In addition, a weight sensor is arranged below the bin body supporting part, the weight sensors are supported on the basis of the metering bin, 3 or more than 3 weight sensors are arranged, preferably 3 weight sensors are uniformly distributed on the annular cross beam to form a stable supporting effect on the metering bin;
the measuring bin foundation is of a high platform type structure according to the prior art, the measuring bin is arranged in the measuring bin foundation, so that the measuring bin foundation and the annular cross beam are supported by the weight sensor, the weight of the measuring bin is measured, and the measuring bin foundation is cast by a concrete structure or a steel structure and is used for improving stability.
Further, the first dust remover has two setting modes:
1. the dust remover is connected with the bin body: a first dust remover is arranged on a top plate of the metering bin body, and a dust collecting pipe and an ash returning pipe can be omitted;
2. the dust remover is not connected with the bin body: the metering system is provided with a second dust remover, the second dust remover comprises a dust collecting air pipe and an ash return pipe, the dust collecting air pipe and the ash return pipe are in soft connection with the bin body, the soft connection can be formed by connecting the dust collecting air pipe or the ash return pipe with the bin body by using a soft material, and the second dust remover is generally made of a cloth material or a rubber material.
Therefore, the dust removing equipment can remove the raised dust generated in the feeding and discharging processes, can perform gas exchange treatment on the metering bin in the material inlet and outlet process, and generates the pressure difference between the inside and the outside of the metering bin so as to generate micro negative pressure to ensure that the dust cannot escape to the outside optimally.
Furthermore, the lower part of the metering bin is provided with a standard weight suspension part, the metering system is also provided with a standard weight and a weight lifting device, and the weight lifting device lifts the weight to a position away from the ground for static calibration and verification of the metering bin. In order to meet the metering requirement of trade settlement, the metering bin needs to be statically calibrated and checked by adopting standard weights, so that the placement position of the standard weights and a weight lifting device are designed at the lower part of the metering bin, and the weights can be conveniently loaded or unloaded in the process of calibrating the scale. The weight hoisting device is the electric hoist to the configuration lift control button, set up the weight stores pylon under the hoisting device, the stores pylon is preferred to be set up 3, possess enough space and the structural strength that can hold the weight under the stores pylon.
In addition, the weights can be arranged on the hanging rack in a permanent fixing mode, and the moving and carrying operation among the multiple measuring bins is carried out through a loader or a forklift.
The invention discloses a small-sized metering system loaded on a non-ship body of a metering system, for example, the technical scheme disclosed in Chinese patent CN 110395359. The metering system of the invention meets the metering operation requirement in large-scale ship unloading operation, and the metering bin is arranged on a wharf or a transfer warehouse and the like. Moreover, the metering system is not influenced by mechanical changes of the metering bin, the feeding equipment and the discharging equipment, the accuracy cannot be influenced by residual materials in the metering bin, the highest metering accuracy is realized by calculating the weight difference value between the front and the rear of the metering bin, and the trade settlement metering requirement is met.
The invention also provides a measuring method of the dynamic and static interaction measuring system, wherein the measuring method comprises the following steps:
1): is preset with
Selecting one or more metering bins required to be weighed, and setting preset values of the weight of materials in the selected one or more metering bins and the opening sequence of material conveying valves and bin bottom valves of the one or more metering bins;
closing a material conveying valve corresponding to any metering bin after the weight of the material in the metering bin reaches a preset value;
when a single metering bin is set for conveying materials, after the weight of the materials in the metering bin reaches a preset value, a material conveying valve and material conveying equipment corresponding to the metering bin are closed, the opening time of a bin bottom valve is set, and circular material conveying and material discharging are carried out according to the opening times of the material conveying valve and the bin bottom valve after material discharging;
when a plurality of metering bins are selected, firstly, a material conveying valve of a first metering bin is selected to be opened for conveying materials, after the weight value of materials in the first metering bin reaches a preset value, the material conveying valve of the first metering bin is closed, a material conveying valve of a second metering bin is opened, after the weight value of materials in the second metering bin reaches the preset value, the material conveying valve of the second metering bin is closed, a third metering bin is selected for conveying materials or the metering bin which is used before is used for conveying materials, the process is repeated, the opening time of a bin bottom valve is set, and circular material conveying and material unloading are carried out according to the opening times of the material conveying valve and the bin bottom valve after the material is unloaded;
2): after the feeding equipment takes materials, the metering bin is conveyed by opening a material conveying valve corresponding to the metering bin; weighing in real time by a weight sensor;
3): when the weight in the measuring bin reaches a preset weight value, closing a material conveying valve corresponding to the measuring bin, and recording weighing data S' by the system in real time after the signal of the sensor to be detected is stable;
4): opening a bin bottom valve, opening a discharging device for discharging, after the materials are emptied, stabilizing the signal of a weight sensor, closing the bin bottom valve, and recording weighing data S1;
5): the difference of the weighing data of the metering bin recorded before and after the system is as follows: the S' -S1 is T1, and T1 is the material throughput of the measuring bin;
6): and respectively recording the weighing data and the throughput of the materials of each metering bin, and separately and summarizing, calculating and displaying.
Further, in the steps 2) and 4), the weight sensor continuously collects the weight, the change value of the weight of the measuring bin in unit time is carried out, and the feeding flow and the discharging flow are calculated;
the feeding flow and the discharging flow are set, and when the flow exceeds or does not reach the flow value, the opening areas of the conveying valve and the bin bottom valve are correspondingly adjusted, so that the stable dynamic continuous feeding and continuous discharging dynamic metering system is achieved.
Further, in the step 2), the weight sensor continuously collects the weight, the change value of the weight of the measuring bin in unit time is carried out, and the feeding flow and the discharging flow are calculated;
and comparing the weight of the materials in the current metering bin with a preset weight value, and when the weight of the materials does not reach the preset weight value, calculating the weight value which does not reach the preset weight value and intermittently feeding the materials into the metering bin according to the feeding flow control material conveying valve. Because the feeding flow and the discharging flow are large, the conveying amount of the materials can cause large errors when the materials are stopped for a moment, and therefore, when the set weight value is reached, intermittent feeding with fixed time can be carried out after the feeding flow is measured and calculated, the feeding can be carried out more accurately, and the requirement of higher accuracy is met.
The invention integrates the metering functions of ship unloading and ship loading, and can be suitable for the material ship loading and ship unloading operation of large ships, large ship loaders and ship unloaders. The metering bin which can be selected and recycled is adopted for material conveying and discharging, and the metering bin is not a system arranged in a ship body in the prior art, so that the metering system is large in layout, large in flow, stable and reliable, higher in adaptability, lower in cost and higher in efficiency; and the weighing sensor is not used for weighing and peeling once, but used for weighing between a full bin and an empty bin of the metering bin respectively to obtain an accurate weight numerical value, so that the precision is higher.
Drawings
FIG. 1 is a schematic view of a metering system according to the present invention.
Fig. 2 is a schematic discharge view of the metering system of the present invention.
Fig. 3 is a schematic view of a measuring bin provided with an inverted-pointed conical material conveying port according to the invention.
Fig. 4 is a schematic view of a metering bin provided with an inverted frustum-shaped material conveying port according to the present invention.
Fig. 5 is a schematic view of the standard weight hanging part and the standard weight of the present invention.
Fig. 6 is a second schematic diagram of the metering system of the present invention.
Detailed Description
The invention is further elucidated with reference to the drawing.
However, the following description is of several embodiments of the invention, and is intended to provide a basic understanding of the invention and to not identify key or critical elements of the invention or to delineate the scope of the invention.
Example 1:
the invention discloses a dynamic and static interaction metering system, which is suitable for loading or unloading dry, loose, nontoxic and harmless powder or granular materials.
As shown in fig. 1, the present disclosure includes 2 and more than 2 metering silos 1, 2 shown in fig. 1; the metering bin 1 is provided with a weight sensor 2, and a bin bottom valve 3 is arranged below the metering bin 1; and
the feeding device comprises two feeding modes, as shown in fig. 1 and fig. 2, the feeding device is configured as two-way feeding device, the two-way feeding device comprises a chute conveying end 4-1 for conveying at least more than 2 metering bins and an elevator conveying end 4-2 for conveying at least more than 2 metering bins, the chute conveying end 4-1 and the elevator conveying end 4-2 are flexibly connected with the metering bins, and conveying valves for conveying each metering bin are configured on each chute conveying end and each elevator conveying end, namely chute conveying end conveying valves 5-1 and 5-2 and elevator conveying end conveying valves 5-3 and 5-4.
As shown in fig. 1 and 2, two feeding modes are provided, and similarly, other feeding modes may be provided, and other conveying modes such as belt conveying may be included, and the feeding mode is not limited to the two feeding modes shown in the figures.
In this embodiment, regarding the two feeding modes or the material conveying modes, the conveying end 4-1 of the chute is a material conveying pipe for the ship unloader, and the conveying valves are two, namely 5-1 and 5-2; the material conveying pipe 4-2 is a material conveying pipe for materials from the transfer warehouse, and is provided with two material conveying valves 5-3 and 5-4 which are used for conveying from bottom to top; and
the discharging device 20 is arranged below the metering bin 1, materials enter the discharging device after passing through the valve, and the discharging device can select several common material conveying modes including belt conveying, chute conveying and the like. As shown in fig. 2, as a process diagram of the present invention, it indicates two modes of feeding (feeding) and discharging (discharging to a ship loader and discharging to a transfer silo). Specifically, the discharging directions are shown in fig. 2 as two, one is that the left lower part directly discharges to the transport ship 10 through the ship loader 9, and the other is that the right lower part discharges to the transfer warehouse; and
the control system comprises an industrial personal computer, a PLC control cabinet and power supply equipment, wherein the PLC control cabinet is connected with and controls the bin bottom valve, the conveying valve, the weight sensor module group and the communication assembly.
Specifically, a chute conveying end 4-1 and a hoister conveying end 4-2 are arranged above the metering bin 1, and materials are conveyed and directly enter the metering bin 1 after material conveying valves 5-1, 5-2, 5-3 and 5-4 are opened.
The feeding equipment also comprises material conveying equipment, the material conveying equipment is generally conventional equipment such as a horizontal screw conveyor, a vertical screw conveyor, a belt conveyor, a lifting machine, an air conveying groove and the like, and the conveying capacity of the equipment is matched with the material conveying capacity of a ship unloader and a ship loader. And opening a material conveying valve arranged in the material conveying pipe above the metering bin, opening the conveying equipment, and allowing the materials to enter the metering bin through the material conveying pipe through the material conveying valve.
Specifically, the chute conveying end 4-1, the elevator conveying end 4-2 and the bin opening at the top of the metering bin 1 are generally in soft connection, namely, a closed tubular shape formed by materials made of cloth or soft materials such as rubber is used for butting the bin opening and the material conveying pipe, and the arrangement is used for avoiding the influence of the material conveying pipe on the weight of the metering bin and improving the metering accuracy.
In this embodiment, the measurement system further includes a bin supporting portion and a measurement bin base, the bin supporting portion is disposed on the side wall above the center of gravity of the bin body, the bin supporting portion is in an annular beam structure and is in the form of an annular beam directly welded or fixed on the side wall of the bin body in other fixing modes, the annular beam structure can reduce elastic deformation between the bin body and a stress point, and the stress point is located at the connection position of the weight sensor and the annular beam.
A weight sensor 2 is arranged below the bin body supporting part, and the weight sensor 2 is supported on a measuring bin base, so that the weight sensor is connected with an annular beam and the measuring bin base to achieve the purpose of weighing; the weight sensors 2 are arranged on the annular beam in 3 or more than 3, preferably 3, and are uniformly distributed on the annular beam to form a stable supporting function for the metering bin. When a concrete structure is adopted, the influence of vibration and deformation on the metering precision can be eliminated, and the concrete structure is preferable.
In this embodiment, the measuring bin foundation is a high platform structure according to the prior art, and the measuring bin is disposed in the measuring bin foundation, so that the measuring bin foundation and the annular beam are supported by the weight sensor, so as to measure the weight of the measuring bin, and the measuring bin foundation is cast by a concrete structure or a steel structure, so as to increase the stability.
In this embodiment, 1, the bin body is suspended on the weight sensor, so the bin body needs to have enough strength and rigidity; 2. the shape of the bin body is preferably circular, the upper part is generally considered to be cylindrical, the lower part is considered to be inverted-pointed-cone-shaped, and the inclination angle is not less than 55 degrees so as to empty materials, as shown in fig. 3; 3. when the height has the limitation requirement, the lower part can adopt an inverted frustum shape, and the bottom of the discharging cone is fully distributed with an inflation groove, as shown in figure 4.
In this embodiment, as shown in fig. 5, a standard weight hanging portion 15 is further provided at the lower portion of the measuring chamber 1, and the measuring system is further provided with a standard weight 16 and a weight lifting device, and the weight lifting device lifts the weight 16 off the ground to perform static calibration and verification of the measuring chamber. In order to meet the metering requirement of trade settlement, the metering bin needs to be statically calibrated and checked by adopting standard weights, so that the placement position of the standard weights and a weight lifting device are designed at the lower part of the metering bin, and the weights can be conveniently loaded or unloaded in the process of calibrating the scale. The weight hoisting device is the electric hoist to the configuration lift control button, set up the weight stores pylon under the hoisting device, the stores pylon is preferred to be set up 3, possess enough space and the structural strength that can hold the weight under the stores pylon.
In addition, the weights 16 may be permanently fixed on a rack, and the movement and transportation operation between the multiple measuring chambers may be performed by a loader or a forklift.
In the embodiment, the metering system can realize metering in three modes, namely 1, ship unloading, metering and warehouse entry; 2. unloading, metering and loading; 3. ex-warehouse, metering and shipping. The system can be used for direct shipment after unloading or taking materials from a transfer warehouse for shipment, has stronger flexibility, avoids the use limitation of a metering system in the prior art, and has large shipment and unloading amount.
In addition, the system is a metering system fixed on a wharf, static metering is realized, the influence of shaking, vibration and deformation on a metering result caused by unstable foundation generated during metering on a ship body is avoided, and the optimal precision requirement is realized.
The measuring bin is also provided with a dust remover 11, and the dust remover has two installation connection modes:
1. the first dust remover is arranged on the top plate of the bin body, the weight of the dust remover is added into the weight of the metering bin, so that the weight of the metering bin is increased, and a dust collecting air pipe and an ash return pipe can be omitted;
2. the dust remover is not connected with the bin body: the metering system further comprises a second dust remover, the second dust remover comprises a dust collecting air pipe and an ash return pipe, the dust collecting air pipe and the ash return pipe are in soft connection with the bin body, the soft connection can be formed by connecting the dust collecting air pipe or the ash return pipe with the bin body through soft materials, and the second dust remover is generally made of cloth materials or rubber materials. This is preferred, and the dust removal structure does not produce additional weight gain to the dosing bin.
Meanwhile, the dust removing equipment can remove the raised dust generated in the feeding and discharging processes, can also perform gas exchange treatment on the metering bin in the material inlet and outlet processes, and generates a pressure difference between the inside and the outside of the metering bin so as to generate micro negative pressure to ensure that the dust cannot escape outwards optimally.
In the disclosure, in order to perform static calibration and inspection on the metering bin, a standard weight hanging part is arranged at the lower part of the metering bin, and weight calibration is performed after the standard weight is hung at the standard weight hanging part.
The metering system is also provided with a weight lifting device, and the weight lifting device lifts the weight to a position away from the ground, and then static calibration and verification of the metering bin are carried out.
Specifically, weight hoisting device is the electric hoist to the configuration lift control button, set up the weight stores pylon under the hoisting device, the stores pylon is preferred to be set up 3, possess enough space and the structural strength that can hold the weight under the stores pylon.
In addition, the weights can be permanently fixed on the hanging rack, and the moving and carrying operation among the multiple measuring bins can be carried out through a loader or a forklift.
The operation method comprises the following steps:
as shown in figure 6, materials are fed into a metering bin 1 with a weight sensor 2 through a chute conveying end 4-1 or a lifter conveying end 4-2 and a material conveying valve 5-1 or 5-2 or 5-3 or 5-4, when the weight of the materials in the bin reaches a preset value, the materials are conveyed into other metering bins corresponding to the material conveying valves through switching the material conveying valves, sequential material conveying or circular material conveying can be selected, and certainly, the metering bins need to be unloaded before material conveying is finished.
In the actual operation process, the number of the metering bins and the volume of the bin body are determined according to the scale of a transfer station, ship unloading and loading flow, ship load capacity, switching auxiliary time and the possibility of subsequent development, the number of the general metering bins is 2-4, the volume of the bin body is 20-120 t (and meets the requirement that the volume of the bin body is not more than 5% of the ship load capacity of an entering port), the switching frequency of each bin per hour is 2-10 times, and the auxiliary time is considered to be 20% or is determined through accurate calculation; in addition, the maximum unloading capacity of the bin bottom is not less than 120% of the rated unloading capacity of the ship unloader and not more than 120% of the rated loading capacity of the ship loader, and the flow rate is continuously adjustable.
Example (c): the design of the rated ship unloading capacity of 3000t/h, the design of the rated ship loading capacity of 4000t/h, and the trial design of the bin capacity, the number and the maximum unloading capacity of the metering bin are known.
Solution: considering the simplicity and smoothness of the whole transfer station system, the number of the metering bins is initially determined to be 3, and the switching is performed for 10 times per hour, so that the bin volume is at least 3000(t/h) × 1.2/10 (times/h)/3-120 t/seat, and the bin bottom unloading capacity interval is as follows: and the bottom unloading capacity parameter is determined according to the comprehensive factors of a shipping system or an warehousing conveying system of a specific project, wherein the parameters are more than or equal to 3000t/h multiplied by 1.2 (3600 t/h) and less than or equal to 4000t/h multiplied by 1.2 (4800 t/h).
The metering system disclosed by the embodiment is designed in an electromechanical integration way, closed-loop control is realized in the feeding process and the discharging process, the metering precision is high, the feeding is stable, and the measuring range is wide. Meanwhile, the structure is compact, the stability is strong, the failure rate is low, and the operation and the use are convenient.
Example 2:
the measuring method of the dynamic and static interaction measuring system is realized by the measuring system disclosed by the embodiment 1, wherein the measuring method comprises the following steps:
1): is preset with
Selecting one or more metering bins required to be weighed, and setting preset values of the weight of materials in the selected one or more metering bins and the opening sequence of material conveying valves and bin bottom valves of the one or more metering bins;
closing a material conveying valve corresponding to any metering bin after the weight of the material in the metering bin reaches a preset value;
when a single metering bin is set for conveying materials, after the weight of the materials in the metering bin reaches a preset value, a material conveying valve and material conveying equipment corresponding to the metering bin are closed, the opening time of a bin bottom valve is set, and circular material conveying and material discharging are carried out according to the opening times of the material conveying valve and the bin bottom valve after material discharging;
when a plurality of metering bins are selected, firstly, a material conveying valve of a first metering bin is selected to be opened for conveying materials, after the weight value of materials in the first metering bin reaches a preset value, the material conveying valve of the first metering bin is closed, a material conveying valve of a second metering bin is opened, after the weight value of materials in the second metering bin reaches the preset value, the material conveying valve of the second metering bin is closed, a third metering bin is selected for conveying materials or the metering bin which is used before is used for conveying materials, the process is repeated, the opening time of a bin bottom valve is set, and circular material conveying and material unloading are carried out according to the opening times of the material conveying valve and the bin bottom valve after the material is unloaded;
2): after the feeding equipment takes materials, the metering bin is conveyed by opening a material conveying valve corresponding to the metering bin; weighing in real time by a weight sensor;
3): when the weight in the measuring bin reaches a preset weight value, closing a material conveying valve corresponding to the measuring bin, and recording weighing data S' by the system in real time after the signal of the sensor to be detected is stable;
4): opening a bin bottom valve, opening a discharging device for discharging, after the materials are emptied, stabilizing the signal of a weight sensor, closing the bin bottom valve, and recording weighing data S1;
5): the difference of the weighing data of the metering bin recorded before and after the system is as follows: the S' -S1 is T1, and T1 is the material throughput of the measuring bin;
6): and respectively recording the weighing data and the throughput of the materials of each metering bin, and separately and summarizing, calculating and displaying.
The specific operation mode is as follows:
after the metering bin is used for conveying materials, the weighing data S' is recorded by the system in real time after the weight sensor signal of the A # metering bin is stable within a preset delay time period, a bin bottom valve E1 is opened, and discharging equipment F1 with adjustable flow is opened for discharging materials; after the materials are emptied and the signals of the weight sensor are stable, the system immediately records data S1 when a bin bottom valve E1 is closed, and the A # metering bin enters an empty bin standby state;
a # measuring bin weighing data difference (S' -S) recorded before and after system1) Namely the throughput T of the A # measuring bin1. Of course, a certain amount of material may be present in the a # dosing bin before the present feeding, or the material in the a # dosing bin is not emptied last, but this does not affect the dosing result because of the actual throughput T1Refers to the difference in weight of the a # dosing bin recorded before and after the system. Sequentially calculating the weight difference of other measuring bins and the weight difference after circulation according to the method, and counting accumulated data to obtain the total throughput of the dynamic and static interactive measuring scale system in a certain time period;
in the embodiment, in the steps 2) and 4), the weight sensor continuously collects the weight, the change value of the weight of the measuring bin in unit time is calculated, and the feeding flow rate and the discharging flow rate are calculated;
the feeding flow and the discharging flow are set, and when the flow exceeds or does not reach the flow value, the opening areas of the conveying valve and the bin bottom valve are correspondingly adjusted, so that the stable dynamic continuous feeding and continuous discharging dynamic metering system is achieved.
In the embodiment, in the step 2), the weight sensor continuously collects the weight, the change value of the weight of the measuring bin in unit time is carried out, and the feeding flow and the discharging flow are calculated;
and comparing the weight of the materials in the current metering bin with a preset weight value, and when the weight of the materials does not reach the preset weight value, calculating the weight value which does not reach the preset weight value and intermittently feeding the materials into the metering bin according to the feeding flow control material conveying valve. Because the feeding flow and the discharging flow are large, the stopping for a moment can cause large errors to the conveying capacity of the materials, and therefore when the set weight value is reached, intermittent feeding with fixed time is carried out after the feeding flow is measured and calculated, the feeding can be carried out more accurately, and the requirement of higher accuracy is met.
In the method of the embodiment, a control system arranged in the metering system can monitor the weight data of each metering bin in real time, the industrial personal computer is connected with the PLC control cabinet, the PLC control cabinet is connected with and controls the bin bottom valve, the material conveying valve and the weight sensor, data exchange between the PLC control cabinet and the industrial personal computer is realized by means of the communication assembly, and the bin bottom valve and the material conveying valve are controlled to be opened or closed or the opening area is adjusted. All operations can be completed through remote monitoring and operation, and complete intellectualization and automation degree are achieved.
Meanwhile, the document can be printed immediately after the data in the system is uploaded, and information such as the ship number, the unloading variety, the loading variety, the delivery unit, the delivery address, the real delivery weight, the time information, the operator and the like can be printed on the document according to actual needs,
the metering method of the embodiment can realize large-flow ship loading or unloading operation, and is continuous and uninterrupted; meanwhile, on-line continuous metering is realized.
Spatially relative terms such as "below …," "above …," "below," "above," "below," and the like are used for ease of description and to explain the positioning of one element relative to a second element. These terms are intended to encompass different orientations of the corresponding device in addition to different orientations than those depicted in the figures. Further, terms such as "first" and "second," etc., are also used to describe various elements, regions, sections, etc. and are also not intended to be limiting. Like terms refer to like elements throughout the description.
As used herein, the terms "having," "including," "containing," and "exhibiting," and the like are open-ended terms that indicate the presence of stated elements or features, but do not exclude additional elements or features.
With the above range of variations and applications in mind, it should be understood that the present invention is not limited by the foregoing description, nor is it limited by the accompanying drawings. Rather, the invention is limited only by the claims and their legal equivalents.
Claims (10)
1. A dynamic and static interaction metering system is characterized by comprising:
2 and more than 2 metering bins are arranged on the fixed surface, the metering bins are provided with weight sensors, and bin bottom valves are arranged below the metering bins; and
the two-way feeding equipment comprises a chute conveying end for conveying at least more than 2 metering bins and an elevator conveying end for conveying at least more than 2 metering bins, wherein the chute conveying end is flexibly connected with the elevator conveying end and the metering bins, and a conveying valve for conveying each metering bin is arranged on each chute conveying end and each elevator conveying end; and
the discharging equipment is arranged below the metering bin, the material enters the discharging equipment after passing through the bin bottom valve, and the discharging equipment is in flexible connection with the bottom of the metering bin; and
the control system comprises a PLC control cabinet and power supply equipment, wherein the PLC control cabinet is connected with and controls the bin bottom valve, the conveying valve, the weight sensor and the communication assembly.
2. The dynamic and static interaction metering system according to claim 1, wherein the metering bin comprises a cylindrical bin body at the upper part and an inverted frustum-shaped conveying port or an inverted-tip-shaped conveying port below the cylindrical bin body, and the height of the metering bin provided with the inverted-tip-shaped conveying port is larger than that of the metering bin provided with the inverted frustum-shaped conveying port.
3. The dynamic and static interaction metering system according to claim 1, further comprising a bin body supporting portion and a fixed metering bin foundation, wherein the bin body supporting portion is arranged on the side wall above the gravity center of the bin body, the bin body supporting portion is of an annular beam structure, 3 or more than 3 weight sensors are arranged below the bin body supporting portion, the weight sensors are supported on the metering bin foundation, and the metering bin foundation is made of concrete structure pouring or steel structure.
4. The dynamic-static interaction metering system as claimed in claim 1, wherein a first dust remover is arranged on a top plate of the metering bin body.
5. The dynamic-static interaction metering system as claimed in claim 1, wherein the metering system is provided with a second dust remover, the second dust remover comprises a dust collection air pipe and an ash return pipe, and the dust collection air pipe and the ash return pipe are flexibly connected with the bin body.
6. The dynamic-static interaction metering system as claimed in claim 1, wherein a standard weight suspension part is arranged at the lower part of the metering bin, and the metering system is further provided with a standard weight and a weight lifting device, and the weight lifting device lifts the weight to be away from the ground for static calibration and verification of the metering bin.
7. A metering method using the dynamic-static interaction metering system as recited in any one of claims 1 to 6, characterized by comprising the steps of:
1): is preset with
Selecting one or more metering bins required to be weighed, and setting preset values of the weight of materials in the selected one or more metering bins and the opening sequence of material conveying valves and bin bottom valves of the one or more metering bins;
closing a material conveying valve corresponding to any metering bin after the weight of the material in the metering bin reaches a preset value;
when a single metering bin is set for conveying materials, after the weight of the materials in the metering bin reaches a preset value, a material conveying valve and material conveying equipment corresponding to the metering bin are closed, the opening time of a bin bottom valve is set, and circular material conveying and material discharging are carried out according to the opening times of the material conveying valve and the bin bottom valve after material discharging;
when a plurality of metering bins are selected, firstly, a material conveying valve of a first metering bin is selected to be opened for conveying materials, after the weight value of materials in the first metering bin reaches a preset value, the material conveying valve of the first metering bin is closed, a material conveying valve of a second metering bin is opened, after the weight value of materials in the second metering bin reaches the preset value, the material conveying valve of the second metering bin is closed, a third metering bin is selected for conveying materials or the metering bin which is used before is used for conveying materials, the process is repeated, the opening time of a bin bottom valve is set, and circular material conveying and material unloading are carried out according to the opening times of the material conveying valve and the bin bottom valve after the material is unloaded;
2): after the feeding equipment takes materials, the metering bin is conveyed by opening a material conveying valve corresponding to the metering bin; weighing in real time by a weight sensor;
3): when the weight in the measuring bin reaches a preset weight value, closing a material conveying valve corresponding to the measuring bin, and recording weighing data S' by the system in real time after the signal of the sensor to be detected is stable;
4): opening a bin bottom valve, opening a discharging device for discharging, after the materials are emptied, stabilizing the signal of a weight sensor, closing the bin bottom valve, and recording weighing data S1;
5): the difference of the weighing data of the metering bin recorded before and after the system is as follows: s' -S1= T1, and T1 is the material throughput of the measuring bin;
6): and respectively recording the weighing data and the throughput of the materials of each metering bin, and separately and summarizing, calculating and displaying.
8. The measuring method of a dynamic and static interactive measuring system according to claim 7, wherein in the steps 2) and 4), the weight sensor continuously collects the weight, and the change value of the weight of the measuring bin in unit time is carried out to calculate the feeding flow rate and the discharging flow rate;
and setting the feeding flow and the discharging flow, and correspondingly adjusting the opening areas of the conveying valve and the bin bottom valve when the feeding flow and the discharging flow exceed or do not reach the flow.
9. The method as claimed in claim 7, wherein in step 2), the weight sensor continuously collects the weight, and the change value of the weight of the measuring bin in unit time is performed to calculate the feeding flow rate and the discharging flow rate.
10. The dynamic and static interactive metering method of claim 9, wherein the weight of the material in the current metering bin is compared with a preset weight value, and when the preset weight value is not reached, the weight value which is not reached is calculated, and the material is intermittently fed into the metering bin according to the feeding flow control material conveying valve.
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| CN202010482152.5A CN111517127A (en) | 2020-05-29 | 2020-05-29 | Dynamic and static interaction metering system and metering method |
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| CN202010482152.5A CN111517127A (en) | 2020-05-29 | 2020-05-29 | Dynamic and static interaction metering system and metering method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113148594A (en) * | 2021-04-14 | 2021-07-23 | 交通运输部天津水运工程科学研究所 | Automatic control system and control method for flow of bulk cargo unloading hopper group at port |
| CN113148593A (en) * | 2021-04-14 | 2021-07-23 | 交通运输部天津水运工程科学研究所 | Automatic control system and method for port bulk cargo unloading hopper flow |
| CN113353648A (en) * | 2021-08-09 | 2021-09-07 | 北京建工资源循环利用投资有限公司 | Dosing method and apparatus |
| CN113911638A (en) * | 2021-11-24 | 2022-01-11 | 中建材（合肥）机电工程技术有限公司 | Method for detecting feed back rate of bucket elevator |
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2020
- 2020-05-29 CN CN202010482152.5A patent/CN111517127A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113148594A (en) * | 2021-04-14 | 2021-07-23 | 交通运输部天津水运工程科学研究所 | Automatic control system and control method for flow of bulk cargo unloading hopper group at port |
| CN113148593A (en) * | 2021-04-14 | 2021-07-23 | 交通运输部天津水运工程科学研究所 | Automatic control system and method for port bulk cargo unloading hopper flow |
| CN113148593B (en) * | 2021-04-14 | 2022-07-29 | 交通运输部天津水运工程科学研究所 | Automatic control system and method for port bulk cargo unloading hopper flow |
| CN113353648A (en) * | 2021-08-09 | 2021-09-07 | 北京建工资源循环利用投资有限公司 | Dosing method and apparatus |
| CN113353648B (en) * | 2021-08-09 | 2021-11-02 | 北京建工资源循环利用投资有限公司 | Dosing method |
| CN113911638A (en) * | 2021-11-24 | 2022-01-11 | 中建材（合肥）机电工程技术有限公司 | Method for detecting feed back rate of bucket elevator |
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