CN111517127A - Dynamic and static interaction metering system and metering method - Google Patents

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

A dynamic and static interactive measurement system and measurement method

technical field

The invention relates to a metering system, in particular to material conveying and on-line weighing equipment of a bulk material transfer station, and a metering method of the metering system.

Background technique

In recent years, the bulk cement industry has developed rapidly, providing a rare opportunity for the distribution and construction of bulk cement transfer stations. Materials such as bulk cement are dry bulk materials, and the loading capacity of the shipping method is increasing, and the flow of conveying equipment required for loading and unloading is also increasing. Therefore, there is currently no measurement method suitable for its process characteristics. The hull water gauge measures the weight, but this traditional measurement method has low measurement accuracy and is only suitable for miniaturized measurement requirements.

The existing unloading metering device, such as the technical solution disclosed in Chinese patent CN103499378, has a single metering device structure, and the metering device only measures the weight of the unloading material, and does not calculate the difference of the original quality of the silo, and its accuracy is low;

Another example is the technical solution disclosed in Chinese patent CN110395359. The measurement method only weighs the total amount of the measuring bin, and does not weigh the empty measuring bin after unloading, and ignores the residual after each unloading or the residual of the previous unloading. The influence on the weight of the material is not high in accuracy. Furthermore, the measurement method cannot realize the joint work and cyclic work of multiple or single measurement bins. Continued feeding and unloading have a large load on the machine and affect the service life of the equipment. In addition, the feeding flow (incoming material flow) and unloading flow during the working process are not controlled, and these flows cannot be calculated, which is easy to exceed. Load operation will cause problems such as material blockage and machine deformation, and may cause overloading of the load cell, resulting in damage to the load cell, affecting the measurement accuracy, and also affecting the service life of other parts of the equipment.

Moreover, with the great development of shipping volume and modern logistics industry, the existing technology is difficult to adapt to the actual demand. For example, the notice of the Ministry of Industry and Information Technology on Printing and Distributing the Catalogue for the Promotion and Application of the First (Set) of Major Technical Equipment (2019 Edition) (Ministry of Industry and Information Technology [2019] No. 428) requires that the unloading and loading capacities have respectively reached 35,000 tons/hour and 20,000 tons/hour, which shows that the loading and unloading capacity of today's logistics industry, especially shipping, is becoming increasingly huge. See the table below:

Therefore, it is urgent to develop an online weighing equipment with high measurement accuracy, large flow, stable and reliable, low cost and strong adaptability, especially that can meet the measurement requirements of modern logistics system trade settlement and measurement, so that it can be used before entering the warehouse after unloading. Immediately grasp the precise delivery or loading volume after leaving the warehouse before loading.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a dynamic and static interactive metering system, which is suitable for ship loading and unloading, has high metering accuracy, large flow, low cost, strong adaptability, and is more stable and reliable, and can meet the needs of trade Online weighing for settlement measurement requirements.

For this reason, the present invention adopts the following technical solutions:

it includes:

Two or more measuring bins, the measuring bins are provided with weight sensors, and the bottom of the measuring bins is provided with a bin bottom valve, which is used to control the unloading or loading of the materials in the measuring bins.

The weight sensor adopts a high-precision industrial control weighing controller, and the weighing signal is transmitted to the control system through the standard RS232/RS485 serial port network, that is, the PLC control cabinet, to ensure the accuracy and stability of the weighing signal; and

The feeding device is configured as a two-way feeding device, and the two-way feeding device includes a chute conveying end that feeds at least two or more measuring bins and a hoist that feeds at least two or more measuring bins The conveying end, the conveying end of the chute and the conveying end of the elevator are flexibly connected with the measuring bin, and each conveying end of the chute and the conveying end of the elevator are equipped with a conveying valve to realize the conveying of each measuring bin , after the delivery valve is opened, the material can be delivered, and the material will not be delivered after it is closed. The present invention realizes two ways of feeding on each metering bin, namely the feeding at the conveying end of the chute and the feeding at the conveying end of the elevator. In other words, the feeding end of the chute is directly supplied by the ship unloader, and the conveying end of the hoist is supplied by the transfer warehouse, which makes the incoming material of the metering system more diversified and more flexible, and can adapt to various environments. delivery and metering requirements; and

unloading equipment, the unloading equipment is arranged below the measuring bin, the material enters the unloading device after passing through the valve, and the unloading device is flexibly connected to the bottom of the measuring bin;

In the present disclosure, the feeding device can be a screw conveyor on a ship unloader, which conveys materials from bottom to top, or can be conventional equipment such as a belt conveyor, a hoist, or an air conveying trough, and its conveying capacity should be the same as that of the unloader. Matching of ship engine and ship loader capability; and

The control system includes a PLC control cabinet and power supply equipment, the power supply equipment can be set in the PLC control cabinet, and the PLC control cabinet is connected to and controls the bottom valve, the material delivery valve, the weight sensor and the communication components. The power supply equipment includes power cables, control cables, and the like. The PLC control cabinet controls the operation of the feeding valve, the silo bottom valve, the feeding equipment and the unloading equipment, and the PLC control cabinet is connected in communication with the weight sensor module group on the measuring silo; the control system also includes a remote Ethernet A switch and a plurality of Ethernet data switches, and the PLC control cabinet is connected in the Ethernet data switches. The industrial computer and the PLC control cabinet are arranged in the on-site control room. The industrial computer displays the measurement data and has a control interface for controlling the electrical equipment. The PLC controller integrates the PROFINET interface, in addition to having the PROFINET bus communication function, it can also be used for standard TCP communication, by configuring TCP connections or using open communication special modules to establish TCP connections with other devices to achieve communication and remote control. Operation and control.

Further, the measuring bin includes a cylindrical bin body on the upper part and an inverted conical frustum-shaped feeding port or an inverted tapered conical feeding port under the cylindrical bin body, and the height of the measuring bin of the inverted tapered conical feeding port is set. It is larger than the measuring bin with the inverted cone-shaped feeding port to adapt to different discharge environments. When the height of the material is high, the inverted cone-shaped feeding port can be used, and when the material height is low, the inverted cone-shaped feeding port can be used. Cone-shaped feed port.

At the same time, the lower end of the inverted cone-shaped feeding port is provided with an air-filled groove to fluidize the material and make the feeding smoother.

Further, the metering system also includes a silo body support portion and a measuring silo foundation, the silo body support portion is arranged on the side wall above the center of gravity of the silo body, and the silo body support portion is a ring-shaped beam structure. It is an annular beam directly welded or fixed on the side wall of the silo body, and the annular beam structure can reduce the elastic deformation of the silo body and the stress point. In addition, a weight sensor is arranged under the support part of the silo body, and the weight sensor is supported on the basis of the measuring silo. Three or more weight sensors are arranged, preferably 3, which are evenly distributed on the annular beam to form a pair of measuring The stable support of the warehouse;

Wherein, according to the prior art, the base of the measuring bin is a high table structure, and the measuring bin is arranged in the base of the measuring bin, so the weight sensor is used to support the base of the measuring bin and the annular beam, so as to measure the weight of the measuring bin, and The foundation of the metering bin is cast with concrete structure or steel structure to increase the stability.

Further, the first dust collector has two setting modes:

1. The dust collector is connected to the bin body: a first dust collector is arranged on the top plate of the measuring bin body, and the dust collector can omit the dust collection pipe and the dust return pipe;

2. The dust collector is not connected to the silo body: the metering system is provided with a second dust collector, and the second dust collector includes a dust collection air duct and an ash return pipe, and the dust collection air duct and the ash return pipe are connected to the silo body. A soft connection, the soft connection can use a soft material to connect the dust collecting air duct or the ash return duct to the silo body, generally made of cloth material or rubber material.

As a result, the dust removal equipment can remove the dust generated during the feeding and unloading process, and at the same time, it can also process the gas exchange in the metering bin during the process of entering and leaving the material, and generate a pressure difference between the inside and outside of the measuring bin to generate micro Negative pressure keeps the dust from escaping the best.

Further, the lower part of the measuring bin is provided with a standard weight hanging part, and the measuring system is also equipped with a standard weight and a weight lifting device, and the weight lifting device lifts the weight to the ground for measurement. Static calibration and calibration of the bin. In order to meet the measurement requirements of trade settlement, the measurement bin must be statically calibrated and calibrated with standard weights. Therefore, in the lower part of the measurement bin, the placement position of the standard weight and the weight lifting device are designed to facilitate the calibration of the scale. Easy loading or unloading of weights during the process. The weight lifting device is an electric hoist, and is equipped with a lifting control button. A weight hanger is arranged under the lifting device, and three hangers are preferably arranged, and there is enough space under the hanger to accommodate the weight and Structural strength.

In addition, the weights can be permanently fixed on the pylon, and can be moved between multiple weighing bins by a loader or forklift.

The metering system disclosed by the present invention is not a small metering system mounted on the hull, such as the technical solution disclosed in Chinese patent CN110395359. The metering system of the invention meets the metering operation requirements in the large-scale ship unloading operation, and the metering bin is arranged in a wharf or a transfer warehouse or the like. In addition, this metering system is not affected by the mechanical changes of the metering bin, feeding equipment, and unloading equipment, and the remaining material in the measuring bin will not affect the accuracy. Trade settlement measurement requirements.

The present invention also provides a measurement method for a dynamic and static interactive measurement system, wherein, it includes the following steps:

1): Preset

Select one or more measuring bins for material weighing, set the preset value of the material weight in the selected one or more measuring bins, and the delivery valve and bin bottom of the one or more measuring bins valve opening sequence;

After the weight of the material in any one of the measuring bins reaches the preset value, close the feeding valve corresponding to the measuring bin;

When setting a single metering bin for feeding, after the weight of the material in the measuring bin reaches the preset value, close the feeding valve and feeding equipment corresponding to the measuring bin, and set the opening time of the valve at the bottom of the bin. According to the opening times of the delivery valve and the valve at the bottom of the silo, the material is cyclically conveyed and discharged;

When selecting multiple measuring bins, first choose to open the delivery valve of the first measuring bin for material delivery, and close the delivery valve of the first measuring bin after the material weight value of the first measuring bin reaches the preset value. , open the feeding valve of the second measuring bin, close the feeding valve of the second measuring bin after the material weight value of the second measuring bin reaches the preset value, select the third measuring bin for feeding or use The previously used metering silo is used for feeding, and so on, and the opening time of the valve at the bottom of the silo is set. After unloading, the material is cyclically conveyed and discharged according to the opening times of the feeding valve and the valve at the bottom of the silo;

2): After the feeding equipment takes the material, the material is conveyed to the measuring bin by opening the feeding valve of the corresponding measuring bin; the weight sensor performs real-time weighing;

3): When the weight in the measuring bin reaches the preset weight value, close the feeding valve corresponding to the measuring bin, and after the sensor signal is stable, the system records the weighing data S' immediately;

4): Open the valve at the bottom of the silo, open the unloading equipment for unloading, and after the material is unloaded, the signal of the weight sensor is stable, close the valve at the bottom of the silo, and record the weighing data S1;

5): The difference between the weighing data of the measuring bin recorded before and after the system: S'-S1=T1, T1 is the material throughput of the measuring bin this time;

6): Record the weighing data and material throughput of each measuring bin separately, and calculate and display them separately and aggregated.

Further, in steps 2) and 4), the weight sensor continuously collects the weight, and carries out the change value of the weight of the measuring bin in unit time, and calculates the feeding flow and the unloading flow;

Set the feeding flow and discharge flow value. When the flow rate exceeds or does not reach the value, the opening area of the conveying valve and the valve at the bottom of the silo is adjusted accordingly, so as to achieve a stable dynamic continuous feeding and continuous discharging dynamic metering system.

Further, in step 2), the weight sensor continuously collects the weight, and carries out the change value of the weight of the measuring bin per unit time, and calculates the feeding flow and the unloading flow;

Compare the weight of the material in the current measuring bin with the preset weight value. When the preset weight value is not reached, calculate the unreached weight value and control the delivery valve according to the feeding flow to perform intermittent measurement. Feeding in the warehouse. Because the feed flow and discharge flow are relatively large, a short stay will cause a large error in the conveying volume of the material. Therefore, when the set weight value is about to be reached, after the feeding flow is measured and calculated, the intermittent fixed time is carried out. Feeding, can feed more accurately and meet higher precision requirements.

The invention combines the metering functions of unloading and loading into one, and can be applied to the operations of material loading and unloading of large ships, large ship loaders and ship unloaders. The present invention adopts a selectable and cyclically used metering bin for material conveying and unloading, which is not a system installed in the hull in the prior art. The metering system of the present invention has large layout, large flow, stable and reliable, and stronger adaptability. , and the cost is lower and the efficiency is higher; and it is not obtained by the single weighing and tare of the weight sensor, but the accurate weight value is obtained by weighing between the full and empty measuring bins respectively, and the accuracy is higher.

Description of drawings

FIG. 1 is a schematic diagram of the metering system according to the present invention.

Figure 2 is a schematic diagram of the unloading of the metering system according to the present invention.

Fig. 3 is a schematic diagram of a metering bin provided with an inverted tapered conical feeding port according to the present invention.

FIG. 4 is a schematic diagram of a metering bin provided with an inverted frustoconical feeding port according to the present invention.

FIG. 5 is a schematic diagram of the hanging part of the standard weight and the standard weight according to the present invention.

FIG. 6 is a second schematic diagram of the metering system according to the present invention.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings.

However, the following descriptions are only some of the various embodiments of the present invention, which are intended to provide a basic understanding of the present invention, and are not intended to identify key or critical elements of the present invention or the scope of protection of the present invention.

Example 1:

The invention discloses a dynamic and static interactive metering system, which is suitable for the loading or unloading of dry, loose, non-toxic and harmless powder or granular materials. The metering system is generally arranged on the ground of the wharf instead of the hull .

As shown in FIG. 1 , the present disclosure includes two or more measuring bins 1 , and FIG. 1 shows two measuring bins; the measuring bin 1 is provided with a weight sensor 2 , and a weight sensor 2 is provided below the measuring bin 1 silo bottom valve 3; and

Feeding equipment, as shown in Figures 1 and 2, has two feeding methods. For the two feeding methods, the feeding equipment is configured as a two-way feeding equipment, and the two-way feeding equipment includes The chute conveying end 4-1 for conveying at least two or more measuring bins and the elevator conveying end 4-2 for conveying at least two or more measuring bins, the chute conveying end 4-1 is connected to the elevator The conveying end 4-2 is flexibly connected to the metering bin, and each chute conveying end and the hoist conveying end are equipped with a conveying valve for conveying material to each metering bin, respectively feeding the chute conveying end. Valves 5-1 and 5-2, and delivery valves 5-3 and 5-4 at the conveying end of the elevator.

As shown in Figure 1 and Figure 2, there are two feeding methods. Similarly, other feeding methods are also possible, and other conveying methods such as belt conveying can also be included, and are not limited to the two shown in this figure.

In this embodiment, in terms of the above two feeding methods or feeding methods, the concrete conveying end 4-1 of the chute is the feeding pipe of the ship unloader, and the feeding valves are equipped with 5-1 and 5-1. 5-2 two; the conveying pipe 4-2 is the conveying pipe for incoming materials from the transfer warehouse, and it is equipped with two conveying valves 5-3 and 5-4, which are conveyed from bottom to top; and

Unloading equipment 20, the unloading equipment 20 is arranged below the metering bin 1, the material enters the unloading equipment after passing through the valve, and the unloading equipment can choose several common conveying methods, including belt conveying, chute conveying Wait. As shown in Figure 2, as the process diagram of the present invention, it indicates two ways of conveying (feeding) (ship unloader incoming and transfer warehouse incoming), and two ways of discharging (to Ship loader unloading and unloading to transfer warehouse). Specifically, two directions of unloading are shown in FIG. 2 , one is to unload directly to the transport vessel 10 through the ship loader 9 in the lower left, and the other is to unload to the transfer warehouse in the lower right; and

The control system includes an industrial computer, a PLC control cabinet and a power supply device, and the PLC control cabinet is connected to and controls the silo bottom valve, the material delivery valve, the weight sensor module group and the communication component.

Specifically, the conveying end 4-1 of the chute and the conveying end 4-2 of the elevator are arranged above the metering bin 1, and the conveying valves 5-1, 5-2, 5-3 and 5-4 are opened and the materials are conveyed and directly enter the Inside the measuring bin 1.

The feeding equipment also includes conveying equipment, which are generally conventional equipment such as horizontal screw conveyors, vertical screw conveyors, belt conveyors, elevators, and air conveying troughs. The conveying capacity of the ship machine and the ship loader is matched. Open the feeding valve set in the material conveying pipe above the measuring bin, the conveying equipment is turned on, and the material enters the measuring bin through the material conveying pipe through the feeding valve.

Specifically, the conveying end 4-1 of the chute and the conveying end 4-2 of the elevator are generally softly connected to the silo opening at the top of the measuring silo 1, that is, a soft material such as cloth or rubber is used. The closed tube connects the silo mouth and the material conveying pipe. This setting is to avoid the influence of the material conveying pipe on the weight of the measuring silo and improve the accuracy of the measurement.

In this embodiment, the metering system further includes a silo body support portion and a measuring silo foundation, the silo body support portion is arranged on the side wall above the center of gravity of the silo body, and the silo body support portion is an annular beam structure, The form is an annular beam directly welded or fixed on the side wall of the silo body by other fixed methods. The annular beam structure can reduce the elastic deformation of the silo body and the force point, which is located at the weight sensor and the annular beam. of the connection.

The weight sensor 2 is arranged under the support part of the warehouse body, and the weight sensor 2 is supported on the basis of the measuring warehouse, so that the connecting annular beam of the weight sensor and the foundation of the measuring warehouse can achieve the purpose of weighing; the weight sensor 2 is provided with 3 or More than three, preferably three, are evenly distributed on the annular beam to form a stable support for the measuring bin. When the concrete structure is used, the influence of vibration and deformation on the measurement accuracy can be eliminated, which is the best choice.

In this embodiment, the base of the measuring bin is a high table structure according to the prior art, and the measuring bin is set in the base of the measuring bin, so a weight sensor is used between the base of the measuring bin and the annular beam to measure the The weight of the measuring bin is cast with concrete structure or steel structure to increase the stability.

In this embodiment, 1. Since the silo body is suspended on the weight sensor, the silo body needs to have sufficient strength and rigidity; 2. The shape of the silo body is preferably circular. Generally, it is considered that the upper part is cylindrical and the lower part is an inverted cone. The inclination angle is not less than 55°, so that the material can be unloaded, as shown in Figure 3; 3. When the height is limited, the lower part can use the inverted cone type, and the bottom of the discharge cone is full of air-filled grooves, as shown in Figure 4 .

In this embodiment, as shown in FIG. 5 , the lower part of the measuring bin 1 is further provided with a standard weight hanging part 15 , and the measuring system is also equipped with a standard weight 16 and a weight lifting device. The lifting device lifts the weight 16 to the ground and performs static calibration and calibration of the measuring chamber. In order to meet the measurement requirements of trade settlement, the measurement bin must be statically calibrated and calibrated with standard weights. Therefore, in the lower part of the measurement bin, the placement position of the standard weight and the weight lifting device are designed to facilitate the calibration of the scale. Easy loading or unloading of weights during the process. The weight lifting device is an electric hoist, and is equipped with a lifting control button. A weight hanger is arranged under the lifting device, and three hangers are preferably arranged, and there is enough space under the hanger to accommodate the weight and Structural strength.

In addition, the weights 16 can be permanently fixed on the pylon, and can be moved and transported between multiple weighing bins by a loader or a forklift.

In this embodiment, the metering system can realize metering in three ways: 1. Ship unloading-metering-warehousing; 2. Ship unloading-metering-shipping; 3. Unloading-metering-shipping. It can be used whether it is unloading the ship into the warehouse, directly loading the ship after unloading, or taking the material from the transfer warehouse and loading the ship, which is more flexible and avoids the limitations of the use of the metering system in the existing technology. large.

In addition, this system is a measurement system fixed on the wharf, which realizes static measurement, avoids the influence of shaking, vibration and deformation caused by the instability of the foundation during measurement on the hull, and achieves the best accuracy requirements. .

The metering bin is also provided with a dust collector 11, and the dust collector has two installation and connection methods:

1. There is a first dust collector on the top plate of the silo body. The weight of the precipitator is included in the weight of the measuring bin, which increases the weight of the measuring bin, but the dust collecting air duct and the ash return duct can be omitted;

2. The dust collector is not connected to the silo body: the metering system further includes a second dust collector, and the second dust collector includes a dust collection air duct and an ash return pipe, and the dust collection air duct and the ash return pipe are connected to the silo body. A soft connection, the soft connection can use a soft material to connect the dust collecting air duct or the ash return duct to the silo body, generally made of cloth material or rubber material. This method is preferred, and the dust removal structure will not cause additional weight gain to the metering bin.

At the same time, the dust removal equipment can remove the dust generated during the feeding and unloading process, and can also process the gas exchange in the metering bin in the process of entering and leaving the material, and generate the pressure difference between the inside and the outside of the measuring bin to generate a slight negative The best pressure is to keep the dust from escaping.

In the present disclosure, in order to perform static calibration and inspection on the measuring bin, the lower part of the measuring bin is provided with a standard weight hanging part, and the standard weight is hung on the standard weight hanging part to perform weight calibration.

The metering system is also equipped with a weight lifting device, which lifts the weight to the ground and performs static calibration and verification of the metering bin.

Specifically, the weight lifting device is an electric hoist, and is equipped with a lifting control button, and a weight hanger is arranged under the lifting device, preferably three of the hangers are provided, and the hanger is provided with a weight capable of accommodating the weight. Sufficient space and structural strength.

In addition, the weights can also be permanently fixed on the pylon, and can be moved between multiple weighing bins by a loader or forklift.

Operation method:

As shown in Figure 6, the material is fed into the machine with the weight sensor 2 through the chute conveying end 4-1 or the elevator conveying end 4-2, and the material conveying valve 5-1 or 5-2 or 5-3 or 5-4. In measuring bin 1, when the weight of the material in the bin reaches the preset value, the material is transported to the other measuring bins corresponding to the material transport valve by switching the feeding valve. The bin must be unloaded before feeding.

In the actual operation process, the number of measuring bins and the capacity of the bins are determined according to the scale of the transfer station, the flow of unloading and loading, the carrying capacity of the ship, the auxiliary switching time and the possibility of subsequent development. The capacity is 20~120t (and meets the requirement of not more than 5% of the loading weight of the incoming ship), the switching times of each warehouse are 2~10 times per hour, and the auxiliary time is considered to be 20% or determined by accurate calculation; the maximum discharge at the bottom of the other warehouse The capacity should not be less than 120% of the rated ship unloading capacity of the ship unloader, and should not be greater than 120% of the rated ship loading capacity of the ship loader, and the flow rate should be continuously adjustable.

Example: Knowing that the design rated unloading capacity is 3000t/h, the design rated loading capacity is 4000t/h, and the trial design measures the storage capacity, quantity and maximum unloading capacity.

Solution: Considering the simplicity and smoothness of the entire transfer station system, the number of measuring bins is initially determined to be 3 and the switching is performed 10 times per hour, so the capacity of the bin is at least 3000(t/h)×1.2/10(times/h)/3 =120t/seat, the unloading capacity range at the bottom of the silo is: ≥3000t/h×1.2 (=3600t/h)～≤4000t/h×1.2 (=4800t/h), and finally depends on the specific project’s loading system or storage The comprehensive factors of the conveying system determine the discharge capacity parameters at the bottom of the silo.

The metering system disclosed in this embodiment is designed for mechatronics, and the closed-loop control of the feeding process and the discharging process is realized, with high measurement accuracy, stable feeding and wide measurement range. At the same time, the structure is relatively compact, the stability is strong, the failure rate is low, and the operation and use are relatively convenient.

Example 2:

A dynamic and static interactive measurement system measurement method realized by the measurement system disclosed in Embodiment 1, wherein, it includes the following steps:

1): Preset

Select one or more measuring bins for material weighing, set the preset value of the material weight in the selected one or more measuring bins, and the delivery valve and bin bottom of the one or more measuring bins valve opening sequence;

After the weight of the material in any one of the measuring bins reaches the preset value, close the feeding valve corresponding to the measuring bin;

When setting a single metering bin for feeding, after the weight of the material in the measuring bin reaches the preset value, close the feeding valve and feeding equipment corresponding to the measuring bin, and set the opening time of the valve at the bottom of the bin. According to the opening times of the delivery valve and the valve at the bottom of the silo, the material is cyclically conveyed and discharged;

When selecting multiple measuring bins, first choose to open the delivery valve of the first measuring bin for material delivery, and close the delivery valve of the first measuring bin after the material weight value of the first measuring bin reaches the preset value. , open the feeding valve of the second measuring bin, close the feeding valve of the second measuring bin after the material weight value of the second measuring bin reaches the preset value, select the third measuring bin for feeding or use The previously used metering silo is used for feeding, and so on, and the opening time of the valve at the bottom of the silo is set. After unloading, the material is cyclically conveyed and discharged according to the opening times of the feeding valve and the valve at the bottom of the silo;

2): After the feeding equipment takes the material, the material is conveyed to the measuring bin by opening the feeding valve of the corresponding measuring bin; the weight sensor performs real-time weighing;

3): When the weight in the measuring bin reaches the preset weight value, close the feeding valve corresponding to the measuring bin, and after the sensor signal is stable, the system records the weighing data S' immediately;

4): Open the valve at the bottom of the silo, open the unloading equipment for unloading, and after the material is unloaded, the signal of the weight sensor is stable, close the valve at the bottom of the silo, and record the weighing data S1;

5): The difference between the weighing data of the measuring bin recorded before and after the system: S'-S1=T1, T1 is the material throughput of the measuring bin this time;

6): Record the weighing data and material throughput of each measuring bin separately, and calculate and display them separately and aggregated.

The specific operation method:

After the metering bin is feeding, the A# measuring bin will record the weighing data S' immediately after the signal of the weight sensor is stable within the preset delay time period, open the valve E1 at the bottom of the bin, and open the unloading equipment F1 with adjustable flow. After the material is unloaded, the signal of the weight sensor is stable and the bottom valve E1 of the warehouse is closed, the system records the data S1 immediately, and the A# measuring warehouse enters the empty warehouse standby state;

The difference (S'-S ₁ ) of the weighing data of the A# measuring bin recorded before and after the system is the throughput T ₁ of the A# measuring bin this time. Of course, there may be a certain amount of material in the A# measuring bin before this feeding, or the material in the A# measuring bin may not be emptied at the end, but this does not affect the measuring result, because the actual throughput T ₁ refers to The weight difference of the A# measuring bin recorded before and after the system. Calculate the weight difference of other measuring bins and the weight difference after circulation in turn according to the above method, and count the accumulated data to obtain the total throughput of the dynamic and static interactive weighing scale system in a certain period of time;

In this embodiment, in steps 2) and 4), the weight sensor continuously collects the weight, and measures the change value of the bin weight per unit time, and calculates the feeding flow and the discharging flow;

Set the feeding flow and discharge flow value. When the flow rate exceeds or does not reach the value, the opening area of the conveying valve and the valve at the bottom of the silo is adjusted accordingly, so as to achieve a stable dynamic continuous feeding and continuous discharging dynamic metering system.

In this embodiment, in step 2), the weight sensor continuously collects the weight, and measures the change value of the weight of the measuring bin per unit time, and calculates the feed flow rate and the discharge flow rate;

Compare the weight of the material in the current measuring bin with the preset weight value. When the preset weight value is not reached, calculate the unreached weight value and control the delivery valve according to the feeding flow to perform intermittent measurement. Feeding in the warehouse. Because the feeding flow and discharge flow are large, a short stop will cause a large error in the conveying volume of the material. Therefore, when the set weight value is about to be reached, after the feeding flow is measured and calculated, the intermittent fixed time is carried out. It can feed more accurately and meet higher precision requirements.

In the method of this embodiment, the control system set in the metering system can monitor the weight data of each metering bin in real time, the industrial computer is connected to the PLC control cabinet, and the PLC control cabinet is connected to and controls the valve at the bottom of the bin, the feeding valve, and the weight sensor, relying on the communication component. Realize the data exchange between the PLC control cabinet and the industrial computer, and control the opening or closing of the bottom valve and the delivery valve or adjust the opening area. All operations can be completed through remote monitoring and operation, achieving complete intelligence and automation.

At the same time, after the data in this system is uploaded, the documents can be printed immediately, and the ship number, unloading type, loading type, delivery unit, delivery address, actual delivery weight, time information, operator and other information can be printed on the actual needs. on the document,

The metering method of this embodiment can realize a large flow of ship loading or unloading operations, and is continuous and uninterrupted; at the same time, online continuous metering can be realized.

Spatially relative terms such as "below", "above", "below", "above", "above", "below" are used for ease of description and to explain an element relative to a The positioning of the two elements. These terms are intended to encompass different orientations of the corresponding device in addition to those in different orientations than those depicted in the various figures. Further, terms such as "first" and "second" and the like are also used to describe various elements, regions, sections, etc. and are also not intended to be limiting. The same terms refer to the same elements throughout the description.

As used herein, the terms "having", "comprising", "including", "including" and "representing" and the like are open-ended terms that indicate the presence of a stated element or feature, but do not preclude additional elements or characteristics.

With the above scope of variations and applications in mind, it should be understood that the 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 interactive measurement system, is characterized in that, it comprises: 2 or more measuring bins arranged on the fixed surface, the measuring bins are provided with weight sensors, and the bottom of the measuring bins is provided with a bottom valve; and The feeding device is configured as a two-way feeding device, and the two-way feeding device includes a chute conveying end that feeds at least two or more measuring bins and a hoist that feeds at least two or more measuring bins The conveying end, the conveying end of the chute and the conveying end of the elevator are flexibly connected with the measuring bin, and each conveying end of the chute and the conveying end of the elevator is equipped with a conveying valve to realize the conveying of each measuring bin ;and unloading equipment, the unloading equipment is arranged below the measuring silo, the material enters the unloading equipment after passing through the valve at the bottom of the silo, and the unloading equipment is flexibly connected to the bottom of the measuring silo; and The control system includes a PLC control cabinet and power supply equipment, and the PLC control cabinet is connected to and controls the silo bottom valve, the material delivery valve, the weight sensor and the communication component. 2. a kind of dynamic and static interactive metering system according to claim 1, is characterized in that, described metering bin comprises the cylindrical bin body of the upper part and the inverted cone frustum type feeding port or the inverted pointed cone under the cylindrical bin body For the feeding port, the height of the measuring bin with the inverted tapered feeding port is greater than that of the measuring bin with the inverted conical truncated feeding port. 3. a kind of dynamic and static interactive metering system according to claim 1, is characterized in that, described metering system also comprises silo body support part and fixed measuring silo foundation, described silo body support part is arranged above the center of gravity of silo body On the side wall of the silo body, the support part of the warehouse body is an annular beam structure, and 3 or more weight sensors are set under the support part of the warehouse body, and the weight sensors are supported on the basis of the measuring warehouse, and the basis of the measuring warehouse adopts Concrete structure pour or steel structure. 4 . The dynamic and static interactive metering system according to claim 1 , wherein a first dust collector is provided on the top plate of the metering bin body. 5 . 5 . A dynamic and static interactive metering system according to claim 1 , wherein the metering system is provided with a second dust collector, and the second dust collector comprises a dust collecting air duct and an ash return duct. 5 . The dust air duct and the ash return duct are softly connected with the silo body. 6 . The dynamic and static interactive measurement system according to claim 1 , wherein the lower part of the measurement bin is provided with a standard weight hanging part, and the measurement system is also equipped with a standard weight and a weight lifting device. 7 . , the weight lifting device lifts the weight to leave the ground for static calibration and verification of the measuring bin. 7. A measurement method using the dynamic and static interactive measurement system described in any one of claims 1-6, characterized in that, it comprises the steps: 1): Pre-set Select one or more measuring bins for material weighing, set the preset value of the material weight in the selected one or more measuring bins, and the delivery valve and bin bottom of the one or more measuring bins valve opening sequence; After the weight of the material in any one of the measuring bins reaches the preset value, close the feeding valve corresponding to the measuring bin; When setting a single metering bin for feeding, after the weight of the material in the measuring bin reaches the preset value, close the feeding valve and feeding equipment corresponding to the measuring bin, and set the opening time of the valve at the bottom of the bin. According to the opening times of the delivery valve and the valve at the bottom of the silo, the material is cyclically conveyed and discharged; When selecting multiple measuring bins, first choose to open the delivery valve of the first measuring bin for material delivery, and close the delivery valve of the first measuring bin after the material weight value of the first measuring bin reaches the preset value. , open the feeding valve of the second measuring bin, close the feeding valve of the second measuring bin after the material weight value of the second measuring bin reaches the preset value, select the third measuring bin for feeding or use The previously used metering silo is used for feeding, and so on, and the opening time of the valve at the bottom of the silo is set. After unloading, the material is cyclically conveyed and discharged according to the opening times of the feeding valve and the valve at the bottom of the silo; 2): After the feeding equipment takes the material, the material is conveyed to the measuring bin by opening the feeding valve of the corresponding measuring bin; the weight sensor performs real-time weighing; 3): When the weight in the measuring bin reaches the preset weight value, close the feeding valve corresponding to the measuring bin, and after the sensor signal is stable, the system records the weighing data S’ immediately; 4): Open the valve at the bottom of the silo, turn on the unloading equipment for unloading, and after the material is unloaded, the signal of the weight sensor is stable, close the valve at the bottom of the silo, and record the weighing data S1; 5): The difference between the weighing data of the measuring warehouse recorded before and after the system: S’-S1=T1, T1 is the material throughput of the measuring warehouse this time; 6): Record the weighing data and material throughput of each measuring bin separately, and display them separately and aggregated. 8. A measurement method for a dynamic and static interactive measurement system according to claim 7, wherein in steps 2) and 4), the weight sensor continuously collects the weight and changes the weight of the measurement bin per unit time. value, calculate the feed flow and discharge flow; Set the feed flow and discharge flow value, and adjust the opening area of the conveying valve and the silo bottom valve correspondingly when the flow value exceeds or fails to be reached. 9 . The measurement method of a dynamic and static interactive measurement system according to claim 7 , wherein in step 2), the weight sensor continuously collects the weight, and calculates the change value of the weight of the measurement bin per unit time. 10 . Outfeed flow and discharge flow. 10. The measurement method of a dynamic and static interactive measurement system according to claim 9, wherein the weight of the material in the current measurement bin is compared with a preset weight value, and when the preset weight value is not reached When the weight is not reached, the unreached weight value is calculated and the feeding valve is controlled according to the feeding flow to intermittently feed the material into the metering bin.

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