CN112079135B - Material conveying control method for mixing station and mixing station - Google Patents

Material conveying control method for mixing station and mixing station Download PDF

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Publication number
CN112079135B
CN112079135B CN202010875306.7A CN202010875306A CN112079135B CN 112079135 B CN112079135 B CN 112079135B CN 202010875306 A CN202010875306 A CN 202010875306A CN 112079135 B CN112079135 B CN 112079135B
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Prior art keywords
storage tank
discharge
feeding
control method
door
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CN112079135A (en
Inventor
陈苏波
吴俊�
田欣
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Sany Automobile Manufacturing Co Ltd
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Sany Automobile Manufacturing Co Ltd
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/0046—Storage or weighing apparatus for supplying ingredients
    • B28C7/0053—Storage containers, e.g. hoppers, silos, bins
    • B28C7/0061—Storage container plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/0046—Storage or weighing apparatus for supplying ingredients
    • B28C7/0053—Storage containers, e.g. hoppers, silos, bins
    • B28C7/0076—Parts or details thereof, e.g. opening, closing or unloading means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/54—Gates or closures
    • B65D90/66—Operating devices therefor
    • 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
    • B65G65/005—Control arrangements
    • 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
    • B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/02—Filling storage spaces as completely as possible, e.g. application of vibrators

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Accessories For Mixers (AREA)

Abstract

The invention provides a material conveying control method for a mixing station and the mixing station. The stirring station comprises an unloading region, a plurality of storage tanks, a loading carrying device and a material delivery wagon, wherein the unloading region is provided with an unloading region unloading door, the loading carrying device is used for driving the material delivery wagon to move, and the material delivery wagon is used for bearing materials and sending the materials into the storage tanks through a reversing belt. The material conveying control method for the mixing station comprises the following steps: in the feeding process, a discharging door and a feeding carrying device in a discharging area are opened, and a material conveying vehicle conveys materials into a material storage tank; detecting the height difference of the material level in the material storage tank; closing a discharging door of the discharging area based on the material level height difference reaching a threshold value, and stopping the material from being transported to the material storage tank; the reversing belt is controlled to switch the running direction so as to change the feeding position when the material conveying vehicle feeds materials to the material storage tank. Realize the switching to storage tank pay-off position through the switching-over belt, avoid certain position to put the thing material too high and lead to the storage tank to take place to warp or even slope in the storage tank.

Description

Material conveying control method for mixing station and mixing station
Technical Field
The invention relates to the technical field of material stirring, in particular to a material conveying control method for a stirring station and the stirring station.
Background
For the mixing station, the storage tank is adopted to store materials, so that the mixing station has the advantages of large capacity, dust reduction and the like, and the mode of storing materials by adopting the storage tank is widely applied.
However, the material in the material storage tank has a heavy weight and a high stacking height, which easily causes the relative offset between the center of the material and the center of the material storage tank, and especially for the material storage tank with a large diameter, the material storage tank is easily deformed or even inclined.
Disclosure of Invention
The present invention is directed to solving at least one of the above problems.
To this end, a first object of the invention is to provide a material transport control method for a mixing plant.
A second object of the invention is to provide a mixing plant.
In order to achieve the first object of the invention, the technical scheme of the invention provides a material conveying control method for a mixing station, the mixing station comprises an unloading area, a plurality of material storage tanks, a loading carrying device and a material conveying vehicle, the unloading area is provided with an unloading door of the unloading area, the loading carrying device is used for driving the material conveying vehicle to move, the material conveying vehicle is used for bearing materials and conveying the materials into the material storage tanks through a reversing belt, and the material conveying control method comprises the following steps: in the feeding process, opening a discharging door and a feeding carrying device in a discharging area, controlling a material conveying vehicle moving along with the feeding carrying device to convey materials from the discharging area, and conveying the materials into a storage tank through a reversing belt; detecting the height difference of the material levels at two opposite sides in the material storage tank; closing a discharging door of the discharging area based on the fact that the material level height difference reaches the material level height difference threshold value, so as to stop the transportation of the materials from the discharging area to the material storage tank; and controlling the reversing belt to switch the running direction and reopen the discharging door of the discharging area so as to change the feeding position of the material conveying vehicle when feeding the material to the storage tank and continuously convey the material from the discharging area to the storage tank.
The stirring station of this technical scheme drives the removal of material delivery wagon through material loading carrying device, reaches the purpose of the regional material transmission of unloading to the storage in a plurality of storage tanks. The material will load to the material delivery wagon through the regional door of unloading, and the material delivery wagon is through in the switching-over belt transmits the material to a plurality of storage tanks. According to the control method, the direction switching of the reversing belt is controlled by judging whether the height difference of the material level is larger than a preset threshold value, so that the material is conveyed to different directions in the material storage tank, and the problem that the material storage tank is not uniformly stressed and is deformed or even turned over due to the overlarge height difference of the material level in the material storage tank, and the safety performance of the mixing plant is affected is avoided.
In addition, the technical solution provided by the above technical solution of the present invention may further have the following additional technical features:
in the technical scheme, the reversing belt is controlled to switch the running direction and the discharge door of the discharge area is opened again, and the method specifically comprises the step of keeping the discharge door of the discharge area closed within a first time range; after a first time range, controlling the reversing belt to switch the running direction; and after the running direction of the reversing belt is switched, the discharging door of the discharging area is opened again.
This technical scheme is through closing the regional discharge door of unloading in first time span to stop the material and continue to the transmission of material loading carrying device. The reversing belt finishes the transmission of the materials on the reversing belt within a first time range, so that the materials are prevented from being scattered when the reversing belt switches the running direction, and the stability of the stirring station is improved. Open the regional discharge door of unloading after the switching-over belt switching-over is accomplished, avoid can't accurately loading in the material delivery wagon at switching-over in-process material, influence the material loading efficiency of mixing plant.
In any of the above technical solutions, the first time range is determined by the following formula: t1 ═ (LK + PC)/VP; wherein, T1 is the first time range, LK is the length of the reversing belt, PC is the total length of the loading and carrying device, and VP is the running speed at which the material is conveyed.
According to the technical scheme, the numerical value of the first time range can be accurately calculated through the formula T1 ═ LK + PC/VP, so that the closing and opening time of the discharging door of the discharging area can be accurately determined, the situation that materials are scattered due to the fact that the materials are conveyed by the material conveying vehicle by the material loading and carrying device when the reversing belt switches the running direction is avoided, and the working efficiency of the mixing station is further influenced.
Among any one of the above-mentioned technical scheme, control switching-over belt switches the traffic direction and reopens the regional discharge door of unloading again, specifically includes: keeping the discharge door of the discharge area closed within a second time range; after a second time range, the discharge door of the discharge area is opened again; keeping the discharge door of the discharge area open within a third time range; and after the third time range, controlling the reversing belt to switch the running direction.
This technical scheme closes through the regional discharge door of unloading in the second time span and makes the material vacancy of one section distance appear on the material loading carrying device to the material vacancy of control switching-over belt on the material loading carrying device just transmits the switching traffic direction when carrying the vehicle to the material, has avoided material loading carrying device to material delivery wagon conveying material and cause the material unrestrained when the switching-over belt switching-over, and then influences the material loading efficiency at stirring station. And the discharge door of the discharge area is kept in an open state within a third time range, and the material loading and carrying device can load the material conveying vehicle within the shortest time after the reversing belt is switched in the running direction, so that the material loading efficiency of the mixing station is further improved.
In any of the above technical solutions, the loading and carrying device includes a first loading and carrying device, a second loading and carrying device and a third loading and carrying device, which are connected in sequence, and the first loading and carrying device and the third loading and carrying device are arranged side by side; the second time range is the time interval of the reversing belt for switching the running direction; the third time range is determined by the following equation: t3 ═ (LK + PC1+ PC2+ LG1+ (WZ-1) × CR)/VP + TH; wherein, T3 is the third time range, LK is the length of switching-over belt, PC1 is the length of first material loading carrier, PC2 is the length of second material loading carrier, LG1 is the relative distance between the central point of the storage tank close to second material loading carrier and the joint of second material loading carrier, WZ is the serial number of the storage tank from close to second material loading carrier, CR is the diameter of storage tank, VP is the running speed at which the material is conveyed, and TH is the time interval at which the switching-over belt switches over the running direction.
According to the technical scheme, materials are loaded onto the first loading carrying device through the unloading door of the unloading area, then the first loading carrying device transfers the materials to the second loading carrying device, and finally the third loading carrying device loads the materials into the material conveying vehicle, so that the automatic transmission of the materials is realized. Through setting up first material loading carrying device, second material loading carrying device and third material loading carrying device, increased material loading carrying device's length, make material loading carrying device can hold more materials, and then improve the material loading efficiency at mixing station. First material loading carrying device and third material loading carrying device set up side by side for material loading carrying device structure is more simple, the maintenance of being convenient for.
The third time range is determined by a formula of (LK + PC1+ PC2+ LG1+ (WZ-1). multidot.CR)/VP + TH through T3, so that accurate settlement in the third time range is achieved, and the situation that material vacancy on the feeding carrying device cannot accurately correspond to the time point of switching the running direction of the reversing belt is avoided, so that materials are scattered, and the feeding efficiency of the mixing plant is influenced.
Among the above-mentioned arbitrary technical scheme, the upper portion region of storage tank is equipped with relative first feed inlet and the second feed inlet that sets up, is equipped with the first material level height detection device who corresponds with first feed inlet and the second material level height detection device who corresponds with the second feed inlet within the storage tank, detects the material level difference in height of relative both sides in the storage tank, specifically includes: obtaining a material level height difference according to the difference of the detection results of the first material level height detection device and the second material level height detection device; control switching-over belt switches the traffic direction, specifically includes: controlling the reversing belt to switch the running direction based on the detection result of the first material level height detection device being lower than the detection result of the second material level height detection device, so that the material transport vehicle can convey the material into the material storage tank through the first feed port; or based on the detection result of the first material level height detection device being higher than the detection result of the second material level height detection device, the reversing belt is controlled to switch the running direction, so that the material conveying vehicle conveys the material into the material storage tank through the second feed port.
First feed inlet and second feed inlet setting are regional in the upper portion of storage tank among this technical scheme to the position corresponds each other. The reversing belt conveys the materials to the material storage tank through the first feeding hole or the second feeding hole. Be equipped with the first material level height detection device who corresponds with first feed inlet and the second material level height detection device who corresponds with the second feed inlet within the storage tank for detect the material height of both sides in the storage tank, avoid the material level difference in the storage tank too big and lead to the storage tank atress inhomogeneous, and then take place to warp and turn on one's side even.
The material level height difference of the two opposite sides in the material storage tank is detected through simple logic, and the cost is saved.
The material height of both sides in the storage tank is judged through first material level height detecting device and second material level height detecting device, and according to the traffic direction of material level difference switching-over belt, the material height of avoiding in the storage tank relative both sides to differ too greatly and lead to the storage tank to warp and take place to turn on one's side even, and then improve the production safety of stirring station.
Among the above-mentioned any technical scheme, the mixing plant still includes the delivery device of unloading, and the bottom of the relative both sides of storage tank is equipped with a plurality of storage tank discharge doors that set up side by side, and the delivery device of unloading is used for transporting the material that comes from the storage tank discharge door from the storage tank, and the control method is carried to the material, still includes: in the discharging process, the discharging doors of the storage tanks arranged on any side of the storage tanks are opened and closed one by one, and after the discharging doors of the previous storage tanks are closed, the discharging doors of the next storage tanks are opened until all the storage tanks are discharged
The bottom of the relative both sides of storage tank among this technical scheme is equipped with a plurality of storage tanks that set up side by side and unloads the bin gate, and the material can directly drop on the delivery device of unloading through self action of gravity, need not external drive, practices thrift the stirring station cost.
Open one by one and close each storage tank discharge door of locating any side of storage tank at the in-process of unloading, close the back at the storage tank discharge door that will be earlier, open the storage tank discharge door after again, until all storage tanks discharge door opened and closed, avoid opening a certain storage tank discharge door alone and cause the material on the delivery device of unloading to appear piling up and even drop, influence stirring station work efficiency.
Among the above-mentioned arbitrary technical scheme, open and close each storage tank discharge door of locating storage tank arbitrary side one by one, specifically include: opening and closing the discharge doors of the storage tanks one by one according to a first sequence; after all the storage tank discharge doors are opened and closed, opening and closing the storage tank discharge doors one by one again according to a second sequence; wherein the second order is opposite to the first order.
First order and the second order that the storage tank discharge door opened among this technical scheme are opposite for the even uninstallation of material is on the delivery device of unloading, avoids the material on the delivery device of unloading to appear piling up and even drop, improves the work efficiency of mixing station.
In any technical scheme, the opening time of each material storage tank discharging door is kept the same; and/or the time interval from the closing of the discharging door of the prior storage tank to the opening of the discharging door of the subsequent storage tank is the same for any two storage tank discharging doors which are adjacent in opening and closing sequence.
This technical scheme is through each storage tank discharge door keep the same opening time and/or the previous storage tank discharge door closing time is the same with the next storage tank discharge door opening time interval for the material of uninstallation on the delivery device of unloading is more even, improves the work efficiency at stirring station.
In order to achieve the second object of the present invention, the technical solution of the present invention provides a mixing plant, wherein the material is conveyed by using the material conveying control method for a mixing plant according to any one of the above technical solutions, so that all the beneficial effects of any one of the above technical solutions are achieved, and details are not repeated herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a first step of a mixing station material delivery control method according to some embodiments of the present invention;
FIG. 2 is a flow chart of a second step of a material handling control method for a mixing station according to some embodiments of the present invention;
FIG. 3 is a flow chart of a third step of a material transport control method for a mixing station according to some embodiments of the present invention;
FIG. 4 is a flow chart of a fourth step of a material handling control method for a mixing station according to some embodiments of the present invention;
FIG. 5 is a flow chart of a fifth step of a material handling control method for a mixing station according to some embodiments of the present invention;
FIG. 6 is a flow chart of a sixth step of a material handling control method for a mixing station according to some embodiments of the present invention;
FIG. 7 is a flow chart of a seventh step of a material handling control method for a mixing station according to some embodiments of the present invention;
FIG. 8 is a flow chart of an eighth step of a material handling control method for a mixing station according to some embodiments of the present invention;
FIG. 9 is a flow chart of a ninth step of a material transport control method for a mixing station according to some embodiments of the present invention;
FIG. 10 is a flow chart of a tenth step of a material handling control method for a mixing station according to some embodiments of the present invention;
FIG. 11 is a schematic block diagram of a first configuration of a mixing station according to some embodiments of the present invention;
FIG. 12 is a schematic block diagram of a second configuration of a holding tank according to some embodiments of the invention;
FIG. 13 is a block diagram schematically illustrating the structure of a load carrier according to some embodiments of the present invention;
FIG. 14 is a schematic view of a first configuration of a mixing station according to some embodiments of the invention;
FIG. 15 is a flow chart of an eleventh step of a material handling control method for a blending station according to some embodiments of the present invention;
fig. 16 is a flow chart of a twelfth step of a material handling control method for a mixing station according to some embodiments of the present invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 11 to 14 is:
100: stirring station, 110: discharge area, 120: storage tank, 122: first feed port, 124: second feed port, 126: first level height detecting device, 128: second level height detecting device, 130: material loading carrier, 132: first load carrier, 134: second load carrier, 136: third load carrier, 140: material delivery wagon, 150: discharge carrier, 160: storage tank discharge door.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A material transport control method for a mixing station and a mixing station 100 according to some embodiments of the present invention are described below with reference to fig. 1 to 16.
Example 1
The embodiment provides a material conveying control method for a mixing station 100, the mixing station 100 comprises a discharge area 110, a plurality of storage tanks 120, a loading carrying device 130 and a material conveying vehicle 140, and the discharge area 110 is provided with a discharge area discharge door. The loading carrier 130 is used for driving the material transporting vehicle 140 to move, and the material transporting vehicle 140 is used for carrying the material and sending the material into the material storage tank 120 through the reversing belt. As shown in fig. 1, the material conveyance control method for the stirring station 100 includes:
step S102, in the feeding process, opening a discharging door and a feeding carrying device of a discharging area, controlling a material transport vehicle moving along with the feeding carrying device to transport materials from the discharging area, and feeding the materials into a storage tank through a reversing belt;
s104, detecting the height difference of the material levels at two opposite sides in the material storage tank;
step S106, based on the fact that the material level height difference reaches the material level height difference threshold value, closing a discharging door of the discharging area to stop the material from being transported from the discharging area to the material storage tank;
and S108, controlling the reversing belt to switch the running direction and reopening the discharging door of the discharging area so as to change the feeding position when the material conveying vehicle feeds the material to the material storage tank and continuously convey the material from the discharging area to the material storage tank.
The mixing station 100 of this embodiment drives the material transporting vehicle 140 to move through the material loading and carrying device 130, so as to transport the material in the discharging area 110 to the material storage tank 120. In particular, the mixing station 100 may be used for mixing building materials such as concrete, gravel, etc. The loading and carrying device can be a conveying belt, a metal conveying chute, a patterned conveying belt or the like. The material handling cart 140 has a bucket-like structure for storing the material being handled.
In some embodiments of this embodiment, the material transporting vehicle 140 may be fixedly connected to the material loading device 130, and the material transporting vehicle 140 moves along with the movement of the material loading device 130, so as to improve the stability of the material transporting vehicle 140 during material transporting and prevent the material from spilling. In other embodiments of this embodiment, an operator can control the movement of the material transport vehicle 140 relative to the material carrying device 130 according to the loading condition, so as to improve the flexibility of the loading process.
The material storage tank 120 is used for storing materials, and it is understood that the material storage tank 120 may be a cylinder, a rectangular parallelepiped, or an elliptical cylinder. The material is loaded onto the material carriers 130 through the discharge area discharge doors of the discharge area 110 and the material transport cart 140 transports the material through the reversing belts to the plurality of storage bins 120 for storage. Specifically, the reversing belt may be a conveyor belt, a patterned conveyor belt, or the like, for conveying the material to the plurality of material storage tanks 120.
In some embodiments of this embodiment, the number of the material loading vehicles 130 and the material transport vehicles 140 may be one or more to increase the speed of material loading. Each material transfer car 140 is equipped with at least one reversing belt to effect transfer of material from the material transfer car 140 to the storage tank 120.
The material conveying control method for the mixing station 100 comprises the steps of opening the discharge door of the discharge area and the loading carrying device 130, driving the material conveying vehicle 140 to move by the loading carrying device 130, and conveying the materials to the plurality of storage tanks 120 by the material conveying vehicle 140 through the reversing belt for storage. The material level height difference of the two opposite sides of the material stored in the material storage tank 120 is detected, and when the material level height difference reaches the material level height difference threshold value, the discharging door of the discharging area is controlled to be closed, so that the material is stopped to be continuously transported to the material storage tank 120 from the discharging area 110.
And controlling the reversing belt to switch the running direction, and reopening the discharge door of the discharge area to realize the continuous feeding of the mixing station 100. In the embodiment, the materials are transmitted to the storage tank 120 in multiple directions by switching the running direction of the reversing belt, so that the problem that the storage tank 120 is stressed unevenly, deformed or even turned on the side due to the overlarge height difference of the material level in the storage tank 120 is avoided, and the safety performance of the mixing plant 100 is improved.
Example 2
As shown in fig. 2, the present embodiment provides a material conveyance control method for the mixing plant 100, and in addition to the technical features of embodiment 1 described above, the present embodiment further includes the following technical features.
Control switching-over belt switches the traffic direction and reopens the regional discharge door of unloading, specifically includes:
step S202, keeping a discharge door of a discharge area closed within a first time range;
step S204, after a first time range, controlling a reversing belt to switch the running direction;
and step S206, after the running direction of the reversing belt is switched, the discharging door of the discharging area is opened again.
In this embodiment, when the level difference in the storage tank 120 is too large, the discharge door of the discharge area is controlled to remain closed within a first time range, so as to stop the material from being continuously transferred to the load carrier 130. The material on the switching-over belt is transmitted to the storage tank 120 in to the switching-over belt in first time span to lead to the material unrestrained when avoiding the switching-over belt to switch the traffic direction, thereby improve the material loading efficiency of mixing plant 100. After the first time range, the reversing belt switches the running direction, the discharging door of the discharging area is controlled to be opened, the situation that materials cannot be accurately loaded in the material conveying vehicle 140 in the reversing process is avoided, and the feeding efficiency of the mixing plant 100 is improved.
Example 3
The present embodiment provides a material conveyance control method for the mixing plant 100, and in addition to the technical features of any one of the above embodiments, the present embodiment further includes the following technical features.
The first time range is determined by the formula T1 ═ LK + PC)/VP. Where T1 is the first time range, LK is the length of the reversing belt, PC is the total length of the load carrier 130, and VP is the running speed at which the material is being conveyed.
In this embodiment, the numerical value of the first time range can be accurately calculated by the formula T1 ═ LK + PC)/VP, so as to determine the closing and opening times of the discharge doors in the discharge area, thereby avoiding the material scattering caused by the material transfer from the material carrying device 130 to the material transporting vehicle 140 when the reversing belt switches the direction of operation, and further affecting the working efficiency of the mixing plant 100.
Example 4
As shown in fig. 3, the present embodiment provides a material transportation control method for the mixing plant 100, and in addition to the technical features of any one of the above embodiments, the present embodiment further includes the following technical features.
Control switching-over belt switches the traffic direction and reopens the regional discharge door of unloading, specifically includes:
step S302, keeping a discharge door of a discharge area closed within a second time range;
step S304, after a second time range, the discharging door of the discharging area is opened again;
step S306, keeping the discharge door of the discharge area open within a third time range;
and step S308, controlling the reversing belt to switch the running direction after the third time range.
In this embodiment, the discharge door of the discharge area is closed within the second time range, so that a distance of material vacancy occurs in the material loading and carrying device 130, and the material vacancy in the material loading and carrying device 130 is controlled to be just transmitted to the material transporting vehicle 140, so that the operation direction is switched, and the situation that the material is scattered when the material transporting vehicle 140 is transported by the material loading and carrying device 130 during the reversing of the reversing belt is avoided, and the material loading efficiency of the mixing plant 100 is further affected. And, the discharge door of the discharge area is kept in an open state within a third time range, and the material loading and carrying device 130 can load the material transporting vehicle 140 within the shortest time after the switching of the running direction of the reversing belt is completed, so that the loading efficiency of the mixing station 100 is further improved.
Example 5
As shown in fig. 13, the present embodiment provides a material transportation control method for the mixing plant 100, and in addition to the technical features of any one of the above embodiments, the present embodiment further includes the following technical features.
The feeding carrier device 130 includes a first feeding carrier device 132, a second feeding carrier device 134, and a third feeding carrier device 136 connected in sequence, and the first feeding carrier device 132 and the third feeding carrier device 136 are arranged side by side.
The second time range is the time interval for switching the running direction of the reversing belt. The third time frame is determined by the formula (LK + PC1+ PC2+ LG1+ (WZ-1) × CR)/VP + TH, T3. Wherein, T3 is a third time range, LK is the length of the reversing belt, PC1 is the length of the first loading carrier 132, PC2 is the length of the second loading carrier 134, LG1 is the relative distance between the center position of the storage tank 120 near the second loading carrier 134 and the joint of the second loading carrier 134, WZ is the sequence number of the storage tank 120 from near the second loading carrier 134, CR is the diameter of the storage tank 120, VP is the running speed at which the material is conveyed, and TH is the time interval at which the reversing belt switches the running direction.
In this embodiment, the material is loaded onto the first loading carrier 132 through the discharge door of the discharge area, and then the first loading carrier 132 transfers the material to the second loading carrier 134, and finally the third loading carrier 136 loads the material into the material transporting cart 140, so as to realize the automatic transportation of the material. By providing the first, second and third loading carriers 132, 134 and 136, the length of the loading carrier 130 is increased, so that the loading carrier 130 can accommodate more materials, thereby improving the loading efficiency of the mixing station 100. The first and third loading carriers 132, 136 are arranged side by side, so that the loading carrier 130 has a simpler structure and is convenient to repair and maintain.
The third time range is determined by a formula of (LK + PC1+ PC2+ LG1+ (WZ-1) × CR)/VP + TH, so as to realize accurate settlement in the third time range, and avoid that the material vacancy on the material loading and carrying device 130 and the time point of the reversing belt switching the operation direction cannot be accurately corresponded, thereby causing the material to be scattered and affecting the material loading efficiency of the mixing plant 100.
Example 6
As shown in fig. 12, the present embodiment provides a material transportation control method for the mixing plant 100, and in addition to the technical features of any one of the above embodiments, the present embodiment further includes the following technical features.
The upper region of the storage tank 120 is provided with a first feeding hole 122 and a second feeding hole 124 which are oppositely arranged, and a first material level height detection device 126 corresponding to the first feeding hole 122 and a second material level height detection device 128 corresponding to the second feeding hole 124 are arranged in the storage tank 120.
As shown in fig. 4, detect the material level difference in the relative both sides in the storage tank, specifically include:
and step S402, obtaining a material level height difference according to the detection result difference of the first material level height detection device and the second material level height detection device.
As shown in fig. 5 and 6, controlling the reversing belt to switch the running direction specifically includes:
step S502, controlling a reversing belt to switch the running direction based on the detection result of the first material level height detection device being lower than the detection result of the second material level height detection device, so that the material transport vehicle sends the material into a material storage tank through a first feed port; or
And step S602, controlling the reversing belt to switch the running direction based on the detection result of the first material level height detection device is higher than the detection result of the second material level height detection device, so that the material transport vehicle sends the material into the material storage tank through the second feed port.
The first feed opening 122 and the second feed opening 124 are provided in the upper region of the accumulator tank 120 in this embodiment, and are located corresponding to each other. The diverter belt transfers material to the storage tank 120 through the first feed opening 122 or the second feed opening 124.
Be equipped with the first material level height detection device 126 that corresponds with first feed inlet 122 and the second material level height detection device 128 that corresponds with second feed inlet 124 within the storage tank 120, material height of both sides in first material level height detection device 126 and the second material level height detection device 128 are used for detecting storage tank 120 avoids the material level difference in the storage tank 120 too big, and leads to the storage tank 120 atress inhomogeneous, takes place to warp and even takes place to turn on one's side. Specifically, the first level height detecting device 126 and the second level height detecting device 128 may be an infrared level detecting device, an ultrasonic level detecting device, a laser level detecting device, and the like.
The step of detecting the material level height difference of the two opposite sides in the storage tank 120 specifically includes determining the material level height difference of the two opposite sides in the storage tank 120 through simple logic according to the detection result difference of the first material level height detection device 126 and the second material level height detection device 128, so that the cost is saved.
The material heights of the two sides in the storage tank 120 are judged through the first material level height detection device 126 and the second material level height detection device 128, the running direction of the reversing belt is switched according to the material level height difference, the situation that the material heights of the two opposite sides in the storage tank 120 are too large in difference to cause the storage tank 120 to be extruded and deformed or even incline is avoided, and the stability of the mixing plant 100 is improved.
Example 7
As shown in fig. 11, the present embodiment provides a material transportation control method for the mixing plant 100, and in addition to the technical features of any one of the above embodiments, the present embodiment further includes the following technical features.
As shown in fig. 14, the mixing station 100 further includes a discharge carrier 150, and a plurality of storage bin discharge doors 160 are disposed at the bottom of the storage bin 120 on opposite sides of the storage bin, and the discharge carrier 150 is used for transporting the materials from the storage bin discharge doors 160 away from the storage bin 120.
As shown in fig. 7, the material conveying control method for the stirring station 100 further includes:
step S702, in the discharging process, the discharging doors of the storage tanks arranged on any side of the storage tanks are opened and closed one by one, and after the discharging door of the previous storage tank is closed, the discharging door of the next storage tank is opened until the discharging doors of all the storage tanks are opened and closed.
In this embodiment, the bottom of the two opposite sides of the storage tank 120 is provided with a plurality of storage tank discharge doors 160 arranged side by side, and the material can directly fall on the discharge carrier 150 under the action of gravity, so that the cost of the mixing station 100 is saved without being driven by external force. It will be appreciated that the discharge carrier 150 may be a conveyor belt, a metal transfer chute, a patterned conveyor belt, or the like, which functions to transport material away from the storage tank 120.
Specifically, the respective storage tank discharge doors 160 provided on either side of the storage tank 120 are opened and closed one by one during the discharge process to achieve the discharge of the storage tank 120. After the storage tank discharge door 160 that will precede is closed, the storage tank discharge door 160 that will follow is opened again, until all storage tank discharge doors 160 are opened and are closed, avoid opening a certain storage tank discharge door 160 alone and cause the material on the delivery device 150 of unloading to appear piling up even dropping, influence stirring station 100 work efficiency.
In some embodiments of this embodiment, the mixing station 100 may include a plurality of discharge carriers 150 to improve the discharge efficiency of the storage tanks 120.
Example 8
As shown in fig. 8, the present embodiment provides a material transportation control method for the mixing plant 100, and in addition to the technical features of any one of the above embodiments, the present embodiment further includes the following technical features.
Open and close each storage tank discharge door of locating storage tank arbitrary side one by one, specifically include:
step S802, opening and closing the discharge doors of the storage tanks one by one according to a first sequence;
step S804, after all the storage tank discharge doors are opened and closed, opening and closing the storage tank discharge doors one by one again according to a second sequence;
wherein the second order is opposite to the first order.
The discharge doors 160 of the storage tanks are opened and closed one by one according to a first sequence in the discharging process of the storage tank 120, after all the discharge doors 160 of the storage tanks are opened and closed, the discharge doors 160 of the storage tanks are opened and closed one by one according to a second sequence opposite to the first sequence, so that the materials on the discharging carrying device 150 are prevented from being piled up and even falling, and the work efficiency of the mixing station 100 is improved.
Example 9
As shown in fig. 9 and 10, the present embodiment provides a material conveyance control method for the mixing plant 100, and in addition to the technical features of any one of the above embodiments, the present embodiment further includes the following technical features.
Step S902, keeping the opening time of each material storage tank discharging door the same; and/or
In step S1002, the time interval from when the discharge door of the previous storage tank is closed to when the discharge door of the next storage tank is opened is the same for any two storage tank discharge doors adjacent to each other in the opening and closing sequence.
In the present embodiment, the time for opening each storage tank discharge door 160 is the same during the discharging process of the storage tank 120, and/or the time interval from the time when the previous storage tank discharge door is closed to the time when the next storage tank discharge door 160 is opened is the same during the discharging process of the storage tank 120 between any two storage tank discharge doors 160 adjacent to each other in the opening and closing sequence, so that the materials unloaded on the discharge carrier 150 are more uniform, and the work efficiency of the mixing station 100 is improved.
Example 10
The present embodiment provides a mixing station 100, which adopts the material conveying control method for the mixing station 100 according to any one of the above embodiments.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The storage tank is adopted to store materials, so that the storage tank has the advantages of large capacity, less dust and the like, but in the related technology, the weight of the stored materials in the storage tank is large, the stacking is high, the deviation of the center positions of the material center and the storage tank is too large, the pressure around the storage tank is uneven, the storage tank deforms or even turns on the side, and the production safety is damaged.
As shown in fig. 15, in order to solve the above-mentioned problems in the related art, the present embodiment provides a material conveyance control method for a mixing station 100, including:
step S1102, setting a material level height difference threshold value;
step S1104, whether the material level height difference is larger than a threshold value;
and executing step S1106 when the height difference of the material level in the material storage tank is greater than the threshold value, otherwise executing step S1116.
Step S1106, whether a discharge door of a discharge area is opened or not;
when the discharge area discharge door is opened, step S1108 is performed, otherwise step S1110 is performed.
Step S1108, closing a discharge door of a discharge area;
step S1110, reaching a first time range;
step S1112, controlling the reversing belt to switch the running direction;
step S1114, reopening the discharge door of the discharge area;
and step S1116, controlling the reversing belt to convey materials to the material storage tank.
The storage tank 120 in this embodiment includes a first feed opening 122 and a second feed opening 124 disposed in an upper region of the storage tank 120 and disposed opposite to each other. The first level height detecting device 126 and the second level height detecting device 128 are disposed in the storage tank 120 and correspond to the first feeding hole 122 and the second feeding hole 124 in position, for detecting the material height on both sides of the storage tank 120.
The material is loaded onto the material carrier 130 through the discharge area discharge gate and is carried by the material carrier 130 to the material transport cart 140, and the material transport cart 140 transfers the material to the storage tank 120 for storage through the reversing belt.
The material conveying control method for the mixing plant 100 includes setting a material level height difference threshold, detecting material level heights of two sides in the material storage tank 120 through the first material level height detection device 126 and the second material level height detection device 128, and obtaining the material level height difference according to the detection result. And when the height difference of the material level is greater than a preset threshold value, judging whether the discharging door of the discharging area is in an open state.
If the discharge area discharge doors are open, control closes the discharge area discharge doors within the time frame of T1. And if the discharge door of the discharge area is in a closed state, controlling the closing time to reach a first time range. Specifically, the first time range is determined by the formula T1 ═ (LK + PC)/VP. Where T1 is the first time range, LK is the length of the reversing belt, PC is the total length of the load carrier 130, and VP is the running speed at which the material is being conveyed. The first time range is the time required for the material on the reversing belt to be transferred into the storage tank 120, so that the material is prevented from being scattered when the reversing belt switches the running direction, and the feeding efficiency of the stirring station 100 is prevented from being influenced.
After the first time range is reached, the reversing belt is controlled to switch the running direction, the unloading door of the unloading area is opened again, and at the moment, the material is conveyed to another feeding hole of the storage tank 120 through the reversing belt, so that the phenomenon that the material level height difference in the storage tank 120 is too large, the stress of the storage tank 120 is uneven, the storage tank 120 is deformed and even turned on one side is caused, and the production safety is influenced.
As shown in FIG. 16, in some embodiments of the present embodiment, a material transport control method for a mixing plant 100 includes
Step S1202, setting a material level height difference threshold value;
step S1204, whether the material level height difference is larger than a threshold value;
and executing the step S1206 when the level difference in the storage tank is greater than the threshold value, otherwise executing the step S1218.
Step S1206, whether a discharge door of a discharge area is opened or not;
when the discharge area discharge door is opened, step S1208 is performed, otherwise step S1210 is performed.
Step S1208, closing a discharge door of the discharge area;
step S1210, reaching a second time range;
step S1212, reopening the discharge door of the discharge area;
step S1214, reaching the third time range;
step S1216, controlling the reversing belt to switch the running direction;
and step S1218, controlling the reversing belt to convey the material to the storage tank.
In this embodiment, when the level height difference of the storage tank 120 is greater than the predetermined threshold, it is determined whether the discharge door of the discharge area is in an open state. And if the discharge door of the discharge area is in an open state, controlling the discharge door of the discharge area to be in a closed state within a second time range. And if the discharge door of the discharge area is in a closed state, controlling the closing time of the discharge door of the discharge area to reach a second time range.
And specifically, after the second time range is reached, controlling the discharge door of the discharge area to keep an open state in a third time range. It will be appreciated that in the second time frame the discharge area discharge gate is closed and material cannot be loaded onto the load carrier 130, and in the third time frame material continues to be loaded onto the load carrier 130, so that a distance of material vacancy is present above the load carrier 130.
The third time range is the time required for the empty material on the load carrier 130 to transfer to the material transport cart 140. The reversing belt is controlled to complete the switching of the running directions within the third time range, so that the phenomenon that materials are scattered when the running directions are switched to affect the feeding efficiency of the mixing plant 100 is avoided. And, the discharge door of the discharge area is kept in an open state within a third time range, and the material loading and carrying device 130 can load the material transporting vehicle 140 within the shortest time after the switching of the running direction of the reversing belt is completed, so that the loading efficiency of the mixing station 100 is further improved.
Specifically, the third time range may be calculated by the formula T3 ═ (LK + PC1+ PC2+ LG1+ (WZ-1) × CR)/VP + TH. Wherein, T3 is a third time range, LK is the length of the reversing belt, PC1 is the length of the first loading carrier 132, PC2 is the length of the second loading carrier 134, LG1 is the relative distance between the center position of the storage tank 120 near the second loading carrier 134 and the joint of the second loading carrier 134, WZ is the sequence number of the storage tank 120 from near the second loading carrier 134, CR is the diameter of the storage tank 120, VP is the running speed at which the material is conveyed, and TH is the time interval at which the reversing belt switches the running direction.
By accurately calculating the third time range, the situation that the material vacancy on the material loading and carrying device 130 and the time for switching the running direction of the reversing belt cannot be accurately corresponded is avoided, so that the material is scattered, and the material loading efficiency of the mixing plant 100 is influenced.
Specifically, the mixing station 100 further comprises a discharge carrier 150, wherein a plurality of storage tank discharge doors 160 are arranged side by side at the bottoms of two opposite sides of the storage tank 120, and the discharge carrier 150 is used for transporting the materials from the storage tank discharge doors 160 away from the storage tank 120. The materials can directly fall on the discharging and carrying device 150 under the action of self gravity, external force driving is not needed, and the cost of the mixing plant 100 is saved.
And the discharge doors 160 of the storage tanks arranged on any side of the storage tank 120 are opened and closed one by one in the discharging process so as to realize the discharging of the storage tank 120. Specifically, open and close each storage tank's discharge door 160 one by one according to first order, after all storage tank discharge doors 160 were opened and were closed, open and close each storage tank discharge door 160 one by one according to the second order opposite with first order again, avoid unloading the material on the carrier 150 and appear piling up even dropping, improve the work efficiency of mixing plant 100.
It can be understood that the time for each storage tank discharge door 160 to remain open during the discharge of the storage tanks 120 is the same, and/or the time interval from the time when the previous storage tank discharge door is closed to the time when the next storage tank discharge door 160 is opened during the discharge of any two storage tanks 120, which are adjacent to each other in the opening and closing sequence, is the same, so that the materials discharged onto the discharge carrier 150 are more uniform, and the work efficiency of the mixing station 100 is improved.
In summary, the embodiment of the invention has the following beneficial effects:
1. the direction of the material is conveyed to the discharging pipe by the reversing belt through the material level height difference in the material storage tank detected by the material level height detection device, so that the problem that the material storage tank is deformed or even turned on one side due to the overlarge material level height difference in the tank, and the production safety is influenced is avoided.
2. The reversing time point of the reversing belt is limited through the first time range, the second time range or the third time range, so that the phenomenon that the working efficiency of the mixing plant is influenced due to the fact that materials are scattered due to the fact that the reversing belt switches the running direction is avoided.
3. By setting the second time range and the third time range, the reversing belt can complete the switching of the running directions in the material neutral period, and the working efficiency of the mixing plant is further improved.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A material conveying control method for a mixing station is characterized in that the mixing station comprises an unloading area, a plurality of material storage tanks, a loading carrying device and a material conveying vehicle, the unloading area is provided with an unloading door of the unloading area, the loading carrying device is used for driving the material conveying vehicle to move, the material conveying vehicle is used for bearing materials and conveying the materials into the material storage tanks through a reversing belt, and the material conveying control method comprises the following steps:
in the feeding process, opening a discharging door of the discharging area and the feeding carrying device, controlling the material transport vehicle moving along with the feeding carrying device to transport the material from the discharging area, and feeding the material into the storage tank through the reversing belt;
detecting the height difference of the material levels at two opposite sides in the material storage tank;
closing the discharge door of the discharge area based on the material level height difference reaching a material level height difference threshold value to stop the transportation of the material from the discharge area to the storage tank;
and controlling the reversing belt to switch the running direction and reopening the discharge door of the discharge area so as to change the feeding position of the material conveying vehicle when feeding the material to the storage tank and continuously convey the material from the discharge area to the storage tank.
2. The material transport control method for the mixing plant according to claim 1, wherein the controlling the reversing belt to switch the direction of travel and reopen the discharge area discharge door comprises:
holding the discharge region discharge door closed for a first time frame;
after the first time range passes, controlling the reversing belt to switch the running direction;
and after the running direction of the reversing belt is switched, the discharging door of the discharging area is opened again.
3. The material transport control method for a mixing plant of claim 2, characterized in that the first time range is determined by the following formula:
T1＝(LK+PC)/VP；
wherein T1 is the first time range, LK is the length of the reversing belt, PC is the total length of the load carrier, and VP is the running speed at which the material is conveyed.
4. The material transport control method for the mixing plant according to claim 1, wherein the controlling the reversing belt to switch the direction of travel and reopen the discharge area discharge door comprises:
holding the discharge region discharge door closed for a second time frame;
reopening the discharge door of the discharge area after the second time frame has elapsed;
maintaining the discharge doors open in the discharge region for a third time frame;
and after the third time range, controlling the reversing belt to switch the running direction.
5. The material transport control method for a stirring station according to claim 4,
the feeding and carrying device comprises a first feeding and carrying device, a second feeding and carrying device and a third feeding and carrying device which are connected in sequence, and the first feeding and carrying device and the third feeding and carrying device are arranged side by side;
the second time range is the time interval of switching the running direction of the reversing belt;
the third time range is determined by the following formula:
T3＝(LK+PC1+PC2+LG1+(WZ-1)*CR)/VP+TH；
wherein T3 is the third time range, LK is the length of the reversing belt, PC1 is the length of the first loading carrier, PC2 is the length of the second loading carrier, LG1 is the relative distance between the center position of the storage tank near the second loading carrier and the joint of the second loading carrier, WZ is the sequence number of the storage tank from near the second loading carrier, CR is the diameter of the storage tank, VP is the running speed at which the material is conveyed, and TH is the time interval at which the reversing belt switches the running direction.
6. The material conveying control method for the mixing plant as recited in claim 1, wherein the upper region of the material storage tank is provided with a first feeding hole and a second feeding hole which are oppositely arranged, a first material level height detection device corresponding to the first feeding hole and a second material level height detection device corresponding to the second feeding hole are arranged in the material storage tank,
detect the material level difference in height of relative both sides in the storage tank specifically includes:
obtaining the material level height difference according to the detection result difference of the first material level height detection device and the second material level height detection device;
the control the switching-over belt switches over the traffic direction, specifically includes:
controlling the reversing belt to switch the running direction based on the detection result of the first material level height detection device being lower than the detection result of the second material level height detection device, so that the material transport vehicle sends the material into the material storage tank through the first feed port; or
Based on the detection result of the first material level height detection device is higher than the detection result of the second material level height detection device, the reversing belt is controlled to switch the running direction, so that the material transport vehicle passes through the second feed inlet and sends the material into the storage tank.
7. The material transport control method for a mixing station according to any one of claims 1 to 6, wherein the mixing station further comprises a discharge carrier, the bottom of each of two opposite sides of the storage tank is provided with a plurality of storage tank discharge doors arranged side by side, the discharge carrier is used for transporting the materials from the storage tank discharge doors away from the storage tank, and the material transport control method further comprises:
in the discharging process, the discharging doors of the storage tanks arranged on any side of the storage tanks are opened and closed one by one, and after the discharging door of the storage tank in the front is closed, the discharging door of the storage tank in the back is opened until all the discharging doors of the storage tanks are opened and closed.
8. The material conveying control method for the mixing plant according to claim 7, wherein the opening and closing of each of the storage bin discharge doors provided on either side of the storage bin one by one specifically comprises:
according to a first sequence, opening and closing the discharge doors of the storage tanks one by one;
after all the storage tank discharge doors are opened and closed, opening and closing the storage tank discharge doors one by one again according to a second sequence;
wherein the second order is opposite to the first order.
9. The material transport control method for a stirring station according to claim 8,
the opening time of each material storage tank discharging door is the same; and/or
The time interval from the time when the previous material storage tank discharge door is closed to the time when the next material storage tank discharge door is opened is the same for any two material storage tank discharge doors which are adjacent in opening and closing sequence.
10. A mixing plant, characterized in that material is conveyed using the material conveyance control method for a mixing plant according to any one of claims 1 to 9.
CN202010875306.7A 2020-08-27 2020-08-27 Material conveying control method for mixing station and mixing station Active CN112079135B (en)

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