PLC-based automatic pulping system for high-concentration filling slurry

Abstract

The utility model provides a PLC-based high-concentration filling slurry automatic pulping system. The PLC-based high-concentration filling slurry automatic pulping system comprises a powder conveying unit, a spiral feeder, a storage bin, a pulping device, a corresponding material conveying pipeline, a controller and an upper computer. The contact sensor and the weight inductor form a monitoring mechanism of the system, and the transmission motor, the stirring motor, the electric gate and the arch breaking flow aid form an executing mechanism of the system. The monitoring mechanism transmits signals to the PLC in real time, and the PLC sends various control commands to the executing mechanism, so that automatic preparation of the slurry is realized, and labor force is saved to a great extent.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the coal industry filling mining technical field especially relates to a high concentration filling slurry automatic pulp preparation system based on PLC technique control. TECHNICAL BACKGROUND

[0002] Filling mining is one of green mining paths of coal, and filling mining is from the source to prevent surface subsidence, realizes with minimum ecological disturbance to obtain coal resources, and limits the influence on ecological environment, water and soil resources and infrastructure within the controllable range of tolerance, promotes the coordinated and symbiotic development of coal mining and ecological environment.

[0003] At present, the filling mining methods and technologies applied in coal mines in China mainly include solid working face filling mining, solid roadway filling, paste working face filling mining, overburden separation grouting filling mining and high-water material filling mining. Among them, paste working face filling mining is to use coal gangue, fly ash and other industrial solid wastes generated in coal industry as raw materials, to process them by grinding process and add mine water to prepare high-concentration cemented filling materials in a certain proportion instead of cement commonly used in traditional mine filling, and its carbon emission is only 20% of cement, which can greatly reduce the filling cost of mine and promote the development of filling mining technology, and is an important technical support for "green mine" and "waste-free city" construction. However, at present, the preparation and filling work of most coal mine filling slurry need to rely on a large number of manual work, which not only reduces the filling mining operation efficiency, but also increases the labor intensity of operators, and there are certain safety hazards in the harsh working environment. SUMMARY

[0004] In view of the technical problems that the preparation and filling work of most coal mine filling slurry need to rely on a large number of manual work, resulting in low filling mining operation efficiency and high labor intensity of operators, the purpose of the utility model is to provide a high-concentration filling slurry automatic pulp preparation and grouting system based on PLC control.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme.

[0006] The application discloses a high-concentration filling material slurry automatic preparation system based on PLC, which comprises a belt conveyor, a screw feeder, a storage bin and a slurry preparation device, a powder pipeline connected with the storage bin and a clean water pipeline for conveying water for slurry preparation are arranged at the top of the slurry preparation device, and a slurry conveying pipeline for outputting slurry is arranged at the bottom of the slurry preparation device; the system further comprises a PLC control center, a monitoring mechanism and an executing mechanism; the monitoring mechanism transmits monitored signals to the PLC control center in real time; after signal conversion, the PLC control center sends various corresponding control commands to the executing mechanism, so that the weight metering ratio of powder and water entering the slurry preparation device is controlled, and the automatic preparation of high-concentration filling material slurry is realized.

[0007] Further, the PLC control center comprises a PLC controller and an upper computer.

[0008] Further, the monitoring mechanism comprises a contact sensor, a first weight sensor and a second weight sensor, wherein the first weight sensor is arranged at the bottom of the screw feeder, the contact sensor is arranged in the storage bin, and the second weight sensor is arranged at the bottom of the slurry preparation device.

[0009] Further, the executing mechanism comprises a motor, a stirring motor, a first electric gate, a second electric gate, a third electric gate and a fourth electric gate; wherein the motor and the first electric gate are arranged at the top and the bottom of the screw feeder respectively, the stirring motor and the third electric gate are arranged at the top of the slurry preparation device respectively, the fourth electric gate is arranged at the bottom of the slurry preparation device, and the second electric gate is arranged at the bottom of the storage bin.

[0010] Further, a second arch-breaking flow aid is arranged on the sidewall above the second electric gate at the bottom of the storage bin.

[0011] Further, a second weight sensor is arranged on one side above the fourth electric gate at the bottom of the slurry preparation device.

[0012] A specific preferred technical scheme is that, in the high-concentration filling material slurry automatic preparation system based on PLC, the number of the belt conveyor, the screw feeder, the storage bin and the slurry preparation device is 2 to 8 sets; when the system is running, at least one belt conveyor and one screw feeder, one storage bin and one slurry preparation device are in standby state.

[0013] A more preferred technical scheme is that, in the high-concentration filling material slurry automatic preparation system based on PLC, the number of the belt conveyor, the screw feeder, the storage bin and the slurry preparation device is 2 sets; when the system is running, one set is in operation and the other set is in standby.

[0014] Compared with the existing pulping and grouting technology, the high-concentration filling material slurry automatic pulping and grouting system can realize precise control of the processes of powder feeding, weighing, stirring time, slurry concentration and grouting time during slurry preparation, realizes real-time data acquisition and transmission, realizes intelligent management, parameter change and state monitoring of the equipment, therefore, the whole system is high in automation and intelligence, accurate in control, greatly improves the working efficiency of filling mining operation, and reduces the field labor intensity of the operating personnel. Moreover, when working in a harsh working environment, the suitable grouting speed can be adjusted according to the filling condition of the working face, and when a fault such as blockage occurs, the system can be automatically alarmed and timely closed through the PLC intelligent gateway, reminding the working personnel to pay attention to the production site change, timely management control or maintenance system and remove obstacles, and prevent safety accidents. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the utility model, and the signs in the drawing are: 1-belt conveyor; 2-screw feeder: 21-motor, 22-screw mechanism, 23-first arch breaking and flow assisting device, 24-first electric gate, 25-first weight inductance instrument; 3-storage bin: 31-contact sensor, 32-second arch breaking and flow assisting device, 33-second electric gate; 4-powder pipeline; 5-cleaning water pipeline; 6-pulping device: 61-third electric gate, 62-stirring motor, 63-fourth electric gate, 64-second weight inductance instrument; 7-slurry conveying pipeline; 8-PLC control center: 81-upper computer; 82-PLC controller.

[0016] Figure 2 It is Figure 1 schematic diagram of the structure of the screw feeder (in order to clearly and simply describe the structure, only the main components related to PLC control are marked in the drawing, and the remaining components are omitted), and the related signs are the same as Figure 1 .

[0017] Figure 3 It is Figure 1 schematic diagram of the structure of the storage bin (in order to clearly and simply describe the structure, only the main components related to PLC control are marked in the drawing, and the remaining components are omitted), and the related signs are the same as Figure 1 .

[0018] Figure 4 It is Figure 1 schematic diagram of the structure of the pulping device (in order to clearly and simply describe the structure, only the main components related to PLC control are marked in the drawing, and the remaining components are omitted), and the related signs are the same as Figure 1 .

[0019] Figure 5 It is a schematic diagram of the PLC control principle of the utility model.

[0020] Figure 6 The PLC central control unit of the utility model is shown in the figure. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the exemplary embodiments of the utility model, rather than all the embodiments of the utility model. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0023] In addition, in the description of the embodiments of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, or mechanical connection, or direct connection, or indirect connection through an intermediate medium, or communication between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the utility model can be understood according to the specific circumstances. In addition, the embodiments of the utility model involve the description of "first", "second", etc., which is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one feature.

[0024] The technical content of the utility model will be described in detail below, taking the number of belt conveyors, storage bins and pulping devices as 2 sets per seat per set, and taking the one-open-one-back operation mode in the production process as an example.

[0025] The high-concentration filling slurry automatic pulping system of the utility model comprises a feeding unit, a storage unit, a control unit and a pulping unit. After the powder is conveyed to the storage unit through the feeding unit, the powder is synchronously sent into the pulping unit for pulping according to the weight measurement ratio set by the control unit and water, and high-concentration filling slurry is obtained.

[0026] Figure 1 It is a specific embodiment of the utility model.

[0027] As Figure 1 The utility model discloses a high concentration filling material pulp automatic system of making pulp based on PLC, including belt conveyor 1, screw feeder 2, storage bin 3 and pulp making device 6, the top of pulp making device 6 is provided with the powder pipeline 4 of connecting storage bin 3 and the clear water pipeline 5 of conveying pulp water, the bottom of pulp making device 6 is provided with the pulp delivery pipeline 7 of output slurry, the system still includes PLC control center 8, monitoring mechanism and actuating mechanism, the signal that monitoring mechanism will monitor real -time transmission to PLC control center 8, and after the signal conversion of PLC control center 8, various corresponding control commands that actuating mechanism issues, control the weight ration of powder and water that enter pulp making device 6, realize the automatic preparation of high concentration filling material pulp.

[0028] The signal value of the second weight induction instrument 64 at the bottom of the pulp making device 6 affects the opening of the second electric gate 33 of the storage bin 3, when the material is conveyed to the pulp making device 6 through the screw feeder 2, and reaches the weight setting value of the system, the second electric gate 33 of the storage bin 3 is closed, the third electric gate 61 of the clear water pipeline 5 is opened, when the total amount of material and water in the system reaches the setting value of the slurry system, the electric gate 61 of the clear water pipeline is closed, the stirring motor 62 of the pulp making device 6 is started, and the high concentration filling material pulp is prepared.

[0029] As Figure 2As shown, the top and bottom of the screw feeder 2 are respectively provided with a motor 21 and a first electric gate 24, the screw feeder 2 drives the screw device 22 to work through the motor 21, and the bottom of the screw feeder 2 is provided with a first arch breaking and flow assisting device 23, so that in the case of equipment blockage, the blockage is removed by blowing air. During the working process, when the powder raw material is transported into the screw feeder 2, the first weight sensor 25 at the bottom thereof continuously monitors the quality of the raw material. When the set value input by the system in advance is reached, the upper computer 81 sends a warning signal, and the material transportation unit stops working. At this time, a working signal is input, and the PLC controller 82 instructs the motor 21 to work. During the working process, a preset stirring time can be input to the PLC controller 82 according to the actual situation, so as to ensure that the powder in the device can be uniformly mixed within the time period. When the set time is reached, the motor 21 will no longer work, and at this time the PLC controller 82 instructs the first electric gate 24 at the bottom of the screw feeder 2 to open, and the uniformly mixed powder is transported to the storage bin 3. The first weight sensor 25 is always in working state during the whole process, and if it is monitored that the quality of the powder in the screw feeder 2 is unchanged for a long time and is greater than the empty bin state, the PLC controller 82 will be triggered to instruct the arch breaking and flow assisting device 32, so as to handle the possible bin blockage problem. During the process of clearing the blocked powder in the bin by the first arch breaking and flow assisting device 23, the first weight sensor 25 continuously monitors the weight of the powder in the screw feeder 2 in real time until all the powder in the screw feeder is transported to the storage bin. Then, the first electric gate 24 at the bottom of the screw feeder 2 is closed, and the next powder mixing link is entered.

[0030] The working principle of the first weight sensor 25 in the system is that the weight in the empty bin state and the limited weight that the screw feeder 2 can bear are respectively input to the PLC controller 82. When the limited value of the screw feeder 2 is reached, the PLC controller 82 sends a warning signal to stop the powder transportation work; when the filling powder is transported into the storage bin 3, the first weight sensor 25 continuously transmits the monitored weight value of the powder in the screw feeder 2 in the time interval to the PLC controller 82, and the PLC controller 82 compares the monitoring value with the weight value monitored in the empty bin state, and when the difference falls within a certain reasonable range, it can be determined that the powder transportation is complete. At this time, the first electric gate 24 of the screw feeder 2 is automatically closed; if the specified time is exceeded, the clearing device will be started.

[0031] As Figure 3As shown, the storage silo 3 is a cylindrical concrete structure. Inside, a second electric gate 33 is installed at the bottom. Above the second electric gate 33, on the side wall, a contact sensor 31 and a second arch-breaking flow aid 32 are installed. The contact sensor 31 monitors the material storage status in the silo in real time to prevent empty silos and ensure a sufficient supply of pulping raw materials. The second arch-breaking flow aid 32 near the discharge port clears accumulated material promptly to prevent silo blockage. The opening of the second electric gate 33 and the second arch-breaking flow aid 32 is directly controlled by the PLC controller 82. The issuance of control commands is mainly affected by the weight value sensed by the second weight sensor 64 located at the bottom of the pulping device 6.

[0032] like Figure 4 As shown, the pulping device 6 includes a stirring motor 62, a third electric gate 61, a fourth electric gate 63, and a second weight sensor 64. During operation, three comparison values ​​are set for the second weight sensor 64 at the bottom of the pulping device 6: empty chamber value, powder value, and pulp value. When the system starts operating, if the metering mechanism detects that the pulping device 6 is empty and the storage silo 3 has a storage capacity greater than the lower limit, the system will automatically open the second electric gate 33 located at the bottom of the storage silo 6 to transport the uniformly mixed powder to the pulping device 6. This operating principle is basically the same as the principle of the screw feeder 2 conveying powder to the storage silo 3. If the metering mechanism detects that the powder has not reached the required limit value for a long time, the system will activate the second arch-breaking and flow-aiding device 32 on the outer side of the bottom of the storage silo 3 to handle the blockage; if the metering mechanism detects that the powder mass in the pulping device has reached the limit value, the system will close the second electric gate 33 at the bottom of the storage silo 3. At this point, the powder content in the system will serve as the command to open the third electric gate 61 controlling the clean water pipe 5, allowing clean water to flow into the pulping device 6 through the clean water pipe 5. When the metering mechanism detects that the total mass of powder and clean water in the pulping device 6 reaches the slurry content, the system closes the third electric gate 61 controlling the clean water pipe 5 and sends a command to the stirring motor 62 to mix the powder and clean water evenly within a set time to form the slurry material. After the set time is reached, the stirring motor 62 stops working, and the fourth electric gate 63 at the bottom of the pulping device 6 opens, transporting the prepared slurry to the slurry conveying pipe 7 for filling. When the metering mechanism detects that all the slurry has flowed into the slurry conveying pipe 7, the system closes the fourth electric gate 63 at the bottom of the pulping device 6. The pulping device 6 then begins the next pulping process.

[0033] The utility model discloses a preferred embodiment, the PLC control center 8 includes PLC controller 82 and host computer 81, the monitoring mechanism is by contact sensor 31, first weight inductive instrument 25 and second weight inductive instrument 64 are formed, wherein contact sensor 31 sets up in the storage bin 3, and first weight inductive instrument 25 sets up at the bottom of screw feeder 2, and second weight inductive instrument 64 sets up at the bottom of pulping device 6, the executing mechanism includes motor 21, stirring motor 62, first electric gate 24, second electric gate 33, third electric gate 61 and fourth electric gate 63, wherein, motor 21 and first electric gate 24 are arranged at the top and bottom of screw feeder 2 respectively, stirring motor 62, third electric gate 61 are arranged at the top of pulping device 6 respectively, fourth electric gate 63 is arranged at the bottom of pulping device 6, and second electric gate 33 is arranged at the bottom of storage bin 3, the monitoring mechanism and executing mechanism are connected with PLC controller 82, and PLC controller 82 communicates with host computer 81 through communication module.

[0034] Figure 5 、 Figure 6 It is respectively the PLC control principle schematic drawing, PLC center control element schematic drawing of the utility model. Among them, the PLC control system is composed of host computer (man-machine interface) 81 and PLC control unit 82. PLC control unit 82 is composed of Siemens S7-300 series PLC, including a PLC master station and ET200 remote station (PLC slave station). The PLC master station is composed of a CPU of S7-300, an industrial Ethernet communication module, a DP communication module and corresponding rack module and power module, mainly completes signal input output processing, logic calculation, communication processing etc. ET200 remote station is composed of ET200 communication module and corresponding digital input output module, analog input output module, completes the input collection of field detection signal and the output of output signal. The signal collected by ET200 is transmitted to the PLC master station through the DP network cable. The host computer is composed of a Jinhua industrial computer, mainly displays the material level value detected in the field, the weight of the material in the bin, the movement state of the executing mechanism, and the manual operation interface for the operator. The PLC master station and the PLC slave station realize data exchange through Ethernet communication protocol.

[0035] In the preferred technical scheme of the utility model, the number of the belt conveyor 1, the screw feeder 2, the storage bin 3 and the pulping device 6 in the system is 2 sets per seat per set, and a one-open-one-standby operation mode is adopted in the system operation process. When the pulp reserve of one set of equipment is insufficient, another set of equipment is started to replace the first set of equipment, and at this time, the first set of equipment starts to prepare materials to replace another set of equipment. In addition, when any set of equipment fails, the operation of another set of equipment does not affect the filling and grouting, and also saves time for the maintenance of the failed system, ensuring the smooth progress of the whole filling work. The double-system setting greatly improves the efficiency of filling and grouting, and improves the fault tolerance of the single system.

[0036] Although the embodiments of the utility model have been shown and described above, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model. Therefore, it can be understood that any modification, equivalent replacement, improvement, etc. made under the principles and spirits of the embodiments belong to the protection scope of the utility model.

Claims

1. A PLC-based automatic pulping system for high-concentration filling slurry, comprising a belt conveyor (1), a screw feeder (2), a storage silo (3), and a pulping device (6), wherein the top of the pulping device (6) is provided with a powder pipe (4) connecting to the storage silo (3) and a clean water pipe (5) for conveying pulping water, and the bottom of the pulping device (6) is provided with a slurry conveying pipe (7) for outputting slurry, characterized in that: Also include PLC control center (8), monitoring mechanism and executive mechanism.

2. The PLC-based automatic preparation system for high consistency filling slurry according to claim 1, characterized in that: The PLC control center (8) comprises a PLC controller (82) and an upper computer (81).

3. The PLC-based automatic high consistency feed slurry preparation system of claim 1, wherein: The monitoring mechanism is composed of a contact sensor (31), a first weight sensor (25) and a second weight sensor (64), wherein the contact sensor (31) is arranged in the storage bin (3), the first weight sensor (25) is arranged at the bottom of the screw feeder, and the second weight sensor (64) is arranged at the bottom of the pulping device (6).

4. The PLC-based automatic preparation system for high consistency filling slurry according to claim 1, characterized in that: The executive mechanism comprises a motor (21), a stirring motor (62), a first electric gate (24), a second electric gate (33), a third electric gate (61) and a fourth electric gate (63); wherein the motor (21) and the first electric gate (24) are arranged at the top and the bottom of the screw feeder (2) respectively, the stirring motor (62) and the third electric gate (61) are arranged at the top of the pulping device (6) respectively, the fourth electric gate (63) is arranged at the bottom of the pulping device (6), and the second electric gate (33) is arranged at the bottom of the storage bin (3).

5. The PLC-based automatic high consistency fillers slurry preparation system according to claim 1, characterized in that: The second arch-breaking flow aid (32) is arranged outside the inner bottom of the storage bin (3).

6. The PLC-based high consistency fillers slurry automatic preparation system according to claim 1, characterized in that: The second weight sensor (64) is arranged on one side above the fourth electric gate (63) of the inner bottom of the pulping device (6).

7. The PLC-based high consistency fillers slurry automatic slurrying system according to any one of claims 1 to 6, characterized in that: The number of the belt conveyor (1), the screw feeder (2), the storage bin (3) and the pulping device (6) is 2-8 sets; when the system is running, at least one belt conveyor (1), one screw feeder (2), one storage bin (3) and one pulping device (6) are in standby state.

8. The PLC-based high consistency fillers slurry automatic preparation system according to claim 7, characterized in that: The number of the belt conveyor (1), the screw feeder (2), the storage bin (3) and the pulping device (6) is 2 sets; during the system running, one open and one standby running mode is adopted.

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