Discharging valve switching control method, system and device

Abstract

The invention discloses a discharging valve switching control method, system and device, and relates to the technical field of logic control, and the specific steps are as follows: obtaining a conveying belt state signal, an ore feeding belt state signal, a discharging valve state signal and a material level signal; generating a priority discrimination rule according to the blanking valve state signal and the material level signal, and calculating the priority of each blanking valve according to the priority discrimination rule; a first control signal is generated according to the priority of a discharging valve, the state signal of the conveying belt, the state signal of the ore feeding belt, the state signal of the discharging valve and the material level signal, and the discharging valve is controlled; a second control signal is generated based on the conveying belt state signal, the ore feeding belt state signal, the discharging valve state signal and the material level signal, and the ore feeding belt is controlled; automatic switching control over the discharging valves can be achieved, manual participation is reduced, the labor intensity is lowered, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of logic control technology, and more specifically to a material discharge valve switching control method, system and device. Background Art

[0002] In the mining, coal, cement and building materials industries, silos are common facilities used to store processed materials. There are often multiple discharge valves under the silo. By controlling the opening and closing of these discharge valves, the silo can be discharged and the materials can be supplied to the downstream feeding belt, which is then transported to the subsequent process.

[0003] In order to achieve a stable supply of silo materials to the downstream production process, it is necessary to control the reasonable switching of the discharge valves and interlock them with the downstream feeding belt.

[0004] At present, the industry often relies on manual operation. Although the discharge valve can be remotely operated based on DCS / SCADA, the choice of opening the discharge valve needs to comprehensively consider the material level height of the silo, the switch of the discharge valve and the intact state; the switching between the discharge valves needs to ensure a certain continuity to avoid the mine being cut off. This puts high demands on manual operation and increases the workload of the operators. If the operation is improper, the stable supply of downstream materials cannot be met. Therefore, how to realize the intelligent control of the discharge valve is an urgent problem that technicians in this field need to solve. Summary of the invention

[0005] In view of this, the present invention provides a material discharge valve switching control method, system and device to overcome the above-mentioned defects.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A method for switching and controlling a material discharge valve, comprising the following specific steps:

[0008] Obtain the status signal of the conveyor belt, the status signal of the feeding belt, the status signal of the unloading valve and the material level signal;

[0009] Generate a priority determination rule according to the unloading valve state signal and the material level signal, and calculate the priority of each unloading valve according to the priority determination rule;

[0010] Generate a first control signal according to the unloading valve priority, the transport belt status signal, the feeding belt status signal, the unloading valve status signal and the material level signal to control the unloading valve;

[0011] A second control signal is generated based on the transport belt status signal, the feeding belt status signal, the unloading valve status signal and the material level signal to control the feeding belt.

[0012] Optionally, the steps of constructing the priority determination rule are:

[0013] Step 2-1, obtaining a selection signal in the state signal of the unloading valve, and judging whether the unloading valve is involved in the switching according to the selection signal, if so, executing step 2-2; if not, ending;

[0014] Step 2-2, obtaining the unloading valve status signal of the unloading valve involved in the switching, and reading the unloading valve opening and closing status signal, the unloading valve fault signal and the material level signal of the unloading valve status signal;

[0015] Step 2-3, constructing a discharge valve screening condition according to the discharge valve opening and closing state signal, the discharge valve fault signal and the material level signal, and selecting the discharge valve that meets the condition according to the discharge valve screening condition. If the screened discharge valve is one, the priority of the discharge valve is high; if the screened discharge valves are two or more, select any one of the discharge valves according to the material level signal, and the priority of any one of the discharge valves is high.

[0016] Optionally, before calculating the priority of each unloading valve, the priority of the unloading valve needs to be initialized. The specific steps are: generating a priority initialization judgment condition according to the priority of the unloading valve and the unloading valve status signal. If the condition is true, the high priority of the unloading valve is set to no priority; if the condition is false, the operation is terminated.

[0017] Optionally, the material discharge valve control method is:

[0018] Step 3-1, generating a valve opening judgment condition according to the priority of the unloading valve involved in the switching and the feeding belt status signal of the feeding belt corresponding to the unloading valve involved in the switching, if the condition is true, proceed to step 3-2; if the condition is false, perform fault judgment;

[0019] Step 3-2, control the unloading valve involved in the switching to open after a delay, and output the unloading valve opening state signal; wherein the delay time is set according to the valve that was opened last time;

[0020] Step 3-3, judging whether the discharge valve is fully opened according to the discharge valve opening state signal, and if so, performing fault diagnosis, and choosing whether to execute step 3-4 according to the fault diagnosis result; if not, performing discharge valve opening fault monitoring;

[0021] Step 3-4, real-time monitoring of the discharge valve opening status signal, the material level signal, the fault judgment signal and the feeding belt status signal is performed, and a valve closing judgment condition is generated according to the discharge valve opening status signal, the material level signal, the fault judgment signal and the feeding belt status signal, and whether the valve closing judgment condition is true is judged, and if so, the discharge valve is closed and the discharge valve closing status signal is output; the discharge valve closing fault is judged according to the discharge valve closing status signal; if not, the discharge valve control operation is terminated.

[0022] Optionally, the specific steps of monitoring the opening failure of the discharge valve are:

[0023] Step 3-3-1-1, obtaining the opening state signal of the discharge valve, and generating a judgment condition of whether the discharge valve is fully opened according to the opening state signal of the discharge valve;

[0024] Step 3-3-1-2, determine whether the condition for the discharge valve to be fully opened is true, if the condition is true, perform fault determination; if the condition is false, execute step 3-3-1-3;

[0025] Step 3-3-1-3, the valve opening fault timer starts timing. When the preset time is reached, if the condition is still false, execute step 3-3-1-4; if the condition is true, execute step 3-3-1-2;

[0026] Step 3-3-1-4: Stop opening the valve and output a valve opening fault signal.

[0027] Optionally, the fault identification includes material blocking fault identification, and the specific steps are:

[0028] Step 3-3-2-1, constructing a material blocking fault judgment condition based on the unloading valve opening state signal, the material level signal, and the conveying belt state signal;

[0029] Step 3-3-2-2, determine whether the material blocking fault judgment condition is true, if the condition is true, proceed to step 3-3-2-3; if the condition is false, perform valve closing judgment condition determination;

[0030] Step 3-3-2-3, the material blocking judgment timer starts timing. When the preset time is reached, if the condition is still true, execute step 3-3-2-4; if the condition is false, execute step 3-3-2-2;

[0031] Step 3-3-2-4: Output the material blocking alarm signal.

[0032] Optionally, the specific steps for judging the closing fault of the unloading valve are:

[0033] Step 3-4-1, obtaining the closing state signal of the discharge valve, and generating a judgment condition of whether the discharge valve is fully closed according to the closing state signal of the discharge valve;

[0034] Step 3-4-2, determine whether the closing condition of the discharge valve is true, if the condition is true, end the operation; if the condition is false, execute step 3-4-3;

[0035] Step 3-4-3, the valve closing fault timer starts timing. When the preset time is reached, if the condition is still false, then execute step 3-4-4; if the condition is true, then execute step 3-4-2;

[0036] Step 3-4-4: Stop closing the valve and output a valve closing fault signal.

[0037] Optionally, the specific steps of the feeding belt control method are:

[0038] Step 4-1, obtaining the feeding belt status signal, determining whether any of the feeding belts is running, if so, executing step 4-2; if not, executing step 4-5;

[0039] Step 4-2, generating a feeding belt stop condition according to the feeding belt state signal of any of the feeding belts, the unloading valve state signal of the unloading valve corresponding to any of the feeding belts, and the material level signal, and judging whether the feeding belt stop condition is true, if the condition is true, executing step 4-3; if the condition is false, ending the feeding belt control;

[0040] Step 4-3, delaying the first time, and cutting off the constant control PID loop of any of the feeding belts;

[0041] Step 4-4, stopping any of the feeding belts;

[0042] Step 4-5: judge the interlocking condition. If the condition is true, execute step 4-6; if the condition is false, end the feeding belt control;

[0043] Step 4-6, starting any one of the feeding belts;

[0044] Step 4-7, resetting the selected signal of any of the feeding belts, delaying the second time to enable the constant control PID loop of any of the feeding belts.

[0045] A material discharge valve switching control system, comprising:

[0046] Data acquisition module, used to obtain the status signal of the conveyor belt, the status signal of the ore feeding belt, the status signal of the unloading valve and the material level signal;

[0047] A priority calculation module, used to generate a priority determination rule according to the unloading valve state signal and the material level signal, and calculate the priority of each unloading valve according to the priority determination rule;

[0048] A valve control module, used to generate a first control signal according to the unloading valve priority, the transport belt status signal, the feeding belt status signal, the unloading valve status signal and the material level signal, and control the unloading valve;

[0049] The belt control module is used to generate a second control signal based on the transport belt status signal, the feeding belt status signal, the unloading valve status signal and the material level signal to control the feeding belt.

[0050] A material discharge valve switching control device comprises a material bin, a feeding belt and a transport belt which are arranged in sequence; further comprising: the material bin is provided with two or more material discharge ports, each of the material discharge ports is provided with a set of material discharge valves; each of the material discharge valves is provided with a set of material level detectors; the material discharge valves are interlocked and controlled; and the feeding belts are interlocked and controlled.

[0051] It can be seen from the above technical solution that, compared with the prior art, the present invention discloses a method, system and device for switching control of a discharge valve, which can realize automatic switching control of the discharge valve, reduce manual participation, reduce labor intensity and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0053] Figure 1 A schematic diagram of a production process provided by an embodiment of the present invention;

[0054] Figure 2 A schematic diagram of the method provided by the present invention;

[0055] Figure 3 A schematic diagram of the overall flow of a method for switching a material discharge valve provided by an embodiment of the present invention;

[0056] Figure 4 A schematic diagram of initializing the priority of a material discharge valve in a material discharge valve switching control method provided by an embodiment of the present invention;

[0057] Figure 5A schematic diagram of a flow chart of a material discharge valve priority calculation method for a material discharge valve switching control method provided in an embodiment of the present invention;

[0058] Figure 6 A schematic diagram of a material discharge valve control flow chart of a material discharge valve switching control method provided by an embodiment of the present invention;

[0059] Figure 7 A schematic diagram of a feeding belt control process of a discharge valve switching control method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] On the one hand, an embodiment of the present invention discloses a switching control system for a material discharge valve, such as Figure 1 As shown, it includes a silo, a feeding belt and a transport belt which are arranged in sequence; it also includes: there are two or more discharge ports on the silo, each discharge port is equipped with a set of discharge valves, and each discharge valve is correspondingly installed with a set of material level detectors; discharge valve interlocking control; feeding belt interlocking control.

[0062] In one embodiment, a belt scale is provided on the transport belt for use in detecting the platform.

[0063] Furthermore, in this embodiment, three silos are used, each silo has two sets of material level detectors and two discharge ports at the bottom. Each discharge port is equipped with a set of discharge valves. The discharge valves use automatic discharge valves, and the material level can reflect the material level of the discharge port below. The discharge valves No. 1 and 2 discharge to the No. 1 feeding belt, the discharge valves No. 3 and 4 discharge to the No. 2 feeding belt, and the discharge valves No. 5 and 6 discharge to the No. 3 feeding belt. The discharge valves all have open and close signals. The discharge valves can be selected to participate in the switching control. In this embodiment, all six sets of discharge valves participate in the switching control. The No. 1, 2, and 3 feeding belts transport the ore to the No. 1 transport belt. The No. 1 transport belt is equipped with a belt scale for detecting the platform, that is, the material flow. According to the process characteristics, each feeding belt can only open one set of discharge valves at a time; the No. 1, 2, and 3 feeding belts can only open one set at a time. For safety reasons, when the No. 1, 2, and 3 feeding belts are switched, it is necessary to manually select which belt to open. No. 1, 2, and 3 feeding belts are speed-adjustable belts, which form PID control loops with belt scales respectively to realize automatic control of the machine time and keep the machine time constant.

[0064] On the other hand, this embodiment discloses a method for switching a material discharge valve. In the embodiment, the "&" symbol is used as the logical judgment "and", and the "||" symbol is used as the logical judgment "or", such as Figure 2 As shown, the specific steps are:

[0065] Step 1, obtaining a conveyor belt status signal, a feeding belt status signal, a discharge valve status signal and a material level signal; wherein the conveyor belt status signal includes an operation signal and a time signal; the feeding belt status signal includes a selection signal and an operation signal; the discharge valve status signal includes a selection signal, a discharge valve opening and closing status signal, and a discharge valve fault signal;

[0066] Step 2: Generate a priority determination rule according to the unloading valve state signal and the material level signal, and calculate the priority of each unloading valve according to the priority determination rule;

[0067] Step 3, generating a first control signal according to the unloading valve priority, the transport belt status signal, the feeding belt status signal, the unloading valve status signal and the material level signal, and controlling the unloading valve;

[0068] Step 4: Generate a second control signal based on the transport belt status signal, the feeding belt status signal, the unloading valve status signal and the material level signal to control the feeding belt.

[0069] In one embodiment, the steps for constructing the priority determination rule are:

[0070] Step 2-1, obtain the selection signal in the unloading valve status signal, and determine whether there is an unloading valve involved in the switching according to the selection signal. If so, execute step 2-2; if not, end;

[0071] Step 2-2, obtaining the unloading valve status signal of the unloading valve involved in the switching, and reading the unloading valve opening and closing status signal, the unloading valve fault signal and the material level signal of the unloading valve status signal;

[0072] Step 2-3, construct the unloading valve screening condition according to the unloading valve opening and closing state signal, the unloading valve fault signal and the material level signal, select the unloading valve that meets the condition according to the unloading valve screening condition, if there is only one unloading valve screened out, the priority of the unloading valve is high priority; if there are two or more unloading valves screened out, select any unloading valve according to the material level signal, and the priority of any unloading valve is high priority.

[0073] Among them, the priority judgment rule is: the unloading valve is selected to participate in the switching & the selected unloading valve has no fault & the selected unloading valve has no opening signal & the corresponding material level of the selected unloading valve is high.

[0074] In one embodiment, before calculating the priority of each unloading valve, the priority of the unloading valve needs to be initialized. The specific steps are: generate a priority initialization judgment condition based on the priority of the unloading valve and the unloading valve status signal. If the condition is true, the high priority of the unloading valve is set to no priority; if the condition is false, the operation is terminated.

[0075] The priority initialization judgment condition is: the valve priority is 1 & the valve with valve priority 1 outputs the valve opening signal.

[0076] In one embodiment, the material discharge valve control method is:

[0077] Step 3-1, generating a valve opening judgment condition according to the priority of the unloading valve involved in the switching and the feeding belt state signal of the feeding belt corresponding to the unloading valve involved in the switching, if the condition is true, proceed to step 3-2; if the condition is false, perform fault judgment;

[0078] Step 3-2, control the unloading valve involved in the switching to open after a delay, and output the unloading valve opening state signal; wherein the delay time is set according to the valve that was opened last time;

[0079] Step 3-3, according to the open state signal of the discharge valve, determine whether the discharge valve is fully opened. If so, perform fault diagnosis, and choose whether to execute step 3-4 according to the fault diagnosis result; if not, perform discharge valve opening fault monitoring;

[0080] Step 3-4, real-time monitoring of the discharge valve opening status signal, material level signal, fault judgment signal and feeding belt status signal is performed, and a valve closing judgment condition is generated according to the discharge valve opening status signal, material level signal, fault judgment signal and feeding belt status signal, and it is judged whether the valve closing judgment condition is true. If so, the discharge valve is closed and the discharge valve closing status signal is output; the discharge valve closing fault is judged according to the discharge valve closing status signal; if not, the discharge valve control operation is terminated.

[0081] Among them, the valve opening judgment conditions are: the unloading valve is selected to participate in the switching control & the unloading valve priority is 1 & the downstream feeding belt is running;

[0082] The conditions for closing the valve are: (valve fully opened & (low material level & blockage alarm)) || the downstream feeding belt stops.

[0083] In one embodiment, the specific steps of monitoring the opening failure of the discharge valve are as follows:

[0084] Step 3-3-1-1, obtain the unloading valve opening state signal, and generate the unloading valve opening position judgment condition according to the unloading valve opening state signal;

[0085] Step 3-3-1-2: Determine whether the condition for the discharge valve to be fully opened is true. If the condition is true, perform fault diagnosis; if the condition is false, execute step 3-3-1-3;

[0086] Step 3-3-1-3, the valve opening fault timer starts timing. When the preset time is reached, if the condition is still false, execute step 3-3-1-4; if the condition is true, execute step 3-3-1-2;

[0087] Step 3-3-1-4: Stop opening the valve and output a valve opening fault signal.

[0088] Furthermore, in step 3-3-1-3, within the preset time, the condition becomes true (the valve is open), and the process jumps to step 3-3-1-2. If the valve opening signal is not captured, the valve opening fault is triggered until the timer reaches the preset time.

[0089] Among them, the judgment condition of the unloading valve being fully opened is that the unloading valve is fully opened;

[0090] In one embodiment, fault identification includes material blocking fault identification, and the specific steps are as follows:

[0091] Step 3-3-2-1, construct the material blocking fault judgment condition based on the material discharge valve opening state signal, material level signal, and conveyor belt state signal;

[0092] Step 3-3-2-2: Determine whether the material blocking fault judgment condition is true. If the condition is true, proceed to step 3-3-2-3; if the condition is false, proceed to the valve closing judgment condition.

[0093] Step 3-3-2-3, the material blocking judgment timer starts timing. When the preset time is reached, if the condition is still true, execute step 3-3-2-4; if the condition is false, execute step 3-3-2-2;

[0094] Step 3-3-2-4: Output the material blocking alarm signal.

[0095] The judgment conditions for the discharge valve to be fully opened are: the discharge valve is fully opened & the material level is high & the machine time is low;

[0096] In one embodiment, the specific steps of determining the closing fault of the discharge valve are as follows:

[0097] Step 3-4-1, obtain the closing state signal of the discharge valve, and generate the judgment condition of whether the discharge valve is fully closed according to the closing state signal of the discharge valve;

[0098] Step 3-4-2, determine whether the closing condition of the discharge valve is true. If the condition is true, end the operation; if the condition is false, execute step 3-4-3;

[0099] Step 3-4-3, the valve closing fault timer starts timing. When the preset time is reached, if the condition is still false, execute step 3-4-4; if the condition is true, execute step 3-4-2;

[0100] Step 3-4-4: Stop closing the valve and output a valve closing fault signal.

[0101] The judgment condition for whether the discharge valve is fully closed is: the discharge valve is fully closed.

[0102] In one embodiment, the overall operation steps are as follows: Figure 3 As shown, specifically:

[0103] It is determined whether the unloading valve switching control function is enabled. If not, the logic ends directly. If enabled, it indicates that the unloading valve switching control function is started, and the process goes to step 201.

[0104] Step S201, the priority of the 1-6 unloading valves is initialized, as follows: Figure 4 As shown, including:

[0105] Step S20101, determine whether there is a valve with a priority of 1 for unloading valves and a valve with a priority of 1 outputting a valve opening signal, if yes, proceed to step S20102, if not, end step S201;

[0106] Step S20102, setting the unloading valve priority of the unloading valve with a priority of 1 to 0.

[0107] The calculation steps for the unloading valve priority include:

[0108] Step S202, determine whether the unloading valve priority calculation conditions are met, if so, proceed to step S203, if not, proceed to step S204; specifically, the unloading valve priority calculation conditions are: there is a feeding belt in operation & the unloading valves upstream of the feeding belt are not opened & a unloading valve is selected to participate in automatic switching & (the selected unloading valve is closed || there is a blockage alarm).

[0109] Further, taking the No. 1 silo as an example, valves 1 and 2 are selected to participate in the switching, and the downstream No. 1 feeding belt is turned on. According to the logic diagram S204, the control logic is: (1) For example, if valve 1 is open and the material level is low, and the material level of valve 2 is high, valve 1 is automatically closed. At this time, valves 1 and 2 are not open. At this time, the priority judgment program is entered, and the priority of valve 2 is 1, and then valve 2 will be controlled to be opened; (2) For example, if valve 1 is open and the material level is high, but there is a material blocking fault, and the material level of valve 2 is high and closed, the priority judgment program is entered, and the priority of valve 2 is 1, and then valve 2 will be controlled to be opened.

[0110] Step S203, calculation of the priority of the material discharge valve. Specifically, the logic of step S203 is shown in Figure 5 ,as follows:

[0111] Step S20301, the priority is set to 0;

[0112] Step S20302, determine whether there is a discharge valve selected to participate in the switching & the selected discharge valve has no fault & the selected discharge valve has no opening signal & the selected discharge valve corresponds to a high material level) discharge valve; in this embodiment, the material level is greater than 16% and the material level is high. If yes, proceed to step S20303, if not, end step S203;

[0113] Step S20303, set the priority of the discharge valve with the highest material level to 1, and the priority of other discharge valves to 0, and then end step S203.

[0114] The specific steps of unloading valve control are:

[0115] Step S204: Control the material discharge valves No. 1 to 6. Specifically, the control logic of each material discharge valve is shown in Figure 6 ,include:

[0116] Step S20401, determine whether the condition is true: the unloading valve is selected to participate in the switching control & the unloading valve priority is 1 & the downstream feeding belt is running. If so, execute step S20402; if not, jump to step S20405;

[0117] Step S20402, after a delay of time T, execute step S20403;

[0118] Further, taking silo No. 1 as an example, valves No. 1 and No. 2 are selected to participate in the switching. If valve No. 1 is closed and valve No. 2 is switched on, step S204 is used to control valve No. 2, then T = 15s; if valve No. 2 is closed and valve No. 1 is switched on, step S204 is used to control valve No. 1, then T = 1s;

[0119] Step S20403, open the valve and output a valve opening signal, then proceed to step S20404;

[0120] Step S20404, determine whether the discharge valve is fully opened, if so, proceed to step S20405; if not, proceed to step S20408;

[0121] Step S20405, judging whether the condition is true: the material discharge valve is fully opened & the material level is high & the machine time is low; if so, proceed to step S20406, if not, jump to step S20412; in this embodiment, the machine time is less than 40t / h, which is low;

[0122] Step S20406, the material blocking judgment timer starts counting, and then proceeds to step S20407;

[0123] Step S20407, determine whether the material blocking determination timer has completed timing; if so, proceed to step S20411, if not, jump to step S20405; in this embodiment, the timing is completed when the timing reaches 180s;

[0124] Step S20408, the valve opening fault timer starts counting, and then proceeds to step S20409;

[0125] Step S20409, determine whether the valve opening fault timer has completed timing, if so, proceed to step S20410; if not, return to step S20404; in this embodiment, the timing is completed when it reaches 10s.

[0126] Step S20410, stop opening the valve, output a valve opening fault signal, and then end the entire step S204;

[0127] Step S20411, outputting a material blocking alarm signal;

[0128] Step S20412, determine whether the following conditions are met: (valve fully opened & (low material level & material blocking alarm)) || downstream belt stops, if yes, go to step S20413; if not, end the entire step S204;

[0129] Step S20413, close the valve and output a valve closing signal;

[0130] Step S20414, determine whether the discharge valve is fully closed, if so, end the entire step S204; if not, enter step S20415.

[0131] Step S20415, the valve closing fault timer starts counting, and then proceeds to step S20416;

[0132] Step S20416, determine whether the valve closing fault timer has completed timing, if so, proceed to step S20417; if not, proceed to step S20414; in this embodiment, the timing is completed when the timing reaches 10s;

[0133] Step S20417, stop closing the valve and output a valve closing fault signal; end the entire step S204.

[0134] In one embodiment, the specific steps of the feeding belt control method are:

[0135] Step 4-1, obtain the feeding belt status signal, determine whether any feeding belt is running, if so, execute step 4-2; if not, execute step 4-5;

[0136] Step 4-2, generating a feeding belt stop condition according to a feeding belt state signal of any feeding belt, a discharge valve state signal of a discharge valve corresponding to any feeding belt, and a material level signal, and judging whether the feeding belt stop condition is true. If the condition is true, executing step 4-3; if the condition is false, ending the feeding belt control;

[0137] Step 4-3, delay the first time, and cut off the constant control PID loop of any feeding belt;

[0138] Step 4-4, stop any feeding belt;

[0139] Step 4-5: judge the interlocking condition. If the condition is true, execute step 4-6; if the condition is false, end the feeding belt control;

[0140] Step 4-6, start any feeding belt;

[0141] Step 4-7, reset the selected signal of any feeding belt, delay the second time to enable the constant control PID loop of any feeding belt.

[0142] Among them, the stopping conditions of the feeding belt are: the feeding belt is running & the corresponding unloading valve of the feeding belt is selected to participate in the switching control & the selected unloading valve is closed & the corresponding material level is low)||(the feeding belt is running & the corresponding unloading valve of the feeding belt is selected to participate in the switching control & the selected unloading valve has a blocking alarm;

[0143] The interlocking conditions are: the feeding belt is selected & other belts in the same group are stopped.

[0144] Further, the feeding belt control steps are as follows: Figure 7 As shown, specifically:

[0145] Step S20501, determine whether the belt is running, if so, proceed to step S20502; if not, proceed to step S20505;

[0146] Step S20502, determine whether the following conditions are met: (this feeding belt is running & this feeding belt has a corresponding unloading valve selected to participate in the switching control & the selected unloading valve is closed & the corresponding material level is low) || (this feeding belt is running & this feeding belt has a corresponding unloading valve selected to participate in the switching control & the selected unloading valve has a blocking alarm). If so, enter step S20503, if not, end the entire step S205; in this embodiment, the No. 1 feeding belt is running, and the corresponding No. 1 and No. 2 unloading valves are selected to participate in the switching control. These two sets of unloading valves are closed, and the corresponding material levels are less than 16% (in this embodiment, the material level is lower than 16% for low material level), and this condition is true; or, the No. 1 feeding belt is running, and the corresponding No. 1 and No. 2 unloading valves are selected to participate in the switching control, and these two sets of unloading valves have blocking alarms, and this condition is also true.

[0147] Step S20503, delaying the first time, synchronously, cutting off the constant control PID loop of the feeding belt; in this embodiment, it is 2 minutes;

[0148] Step S20504, stop the feeding belt, and then end all steps S205;

[0149] Step S20505, determine whether the following conditions are met: the feeding belt is selected & other belts in the same group are stopped. If yes, proceed to step S20506, if no, end all steps S205; in this embodiment, for the No. 1 feeding belt, the personnel selects the belt to participate in the interlocking, and at the same time, the No. 2 and No. 3 feeding belts are in the stopped state, then the condition is true.

[0150] Step S20506, start the ore feeding belt;

[0151] Step S20507, reset the selected signal of the feeding belt; after a delay of the second time, enable the constant control PID loop of the feeding belt, and then end all steps S205. In this embodiment, the second time is 2 minutes.

[0152] On the other hand, this embodiment also discloses a material discharge valve switching control system, including:

[0153] Data acquisition module, used to obtain the status signal of the conveyor belt, the status signal of the ore feeding belt, the status signal of the unloading valve and the material level signal;

[0154] A priority calculation module is used to generate a priority determination rule according to a discharge valve state signal and a material level signal, and calculate the priority of each discharge valve according to the priority determination rule;

[0155] A valve control module, used to generate a first control signal according to a material discharge valve priority, a conveyor belt status signal, a feeding belt status signal, a material discharge valve status signal and a material level signal, and control the material discharge valve;

[0156] The belt control module is used to generate a second control signal based on the transport belt status signal, the feeding belt status signal, the unloading valve status signal and the material level signal to control the feeding belt.

[0157] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0158] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for switching and controlling a material discharge valve, characterized in that: The specific steps are: Obtain the status signal of the conveyor belt, the status signal of the feeding belt, the status signal of the unloading valve and the material level signal; Generate a priority determination rule according to the unloading valve state signal and the material level signal, and calculate the priority of each unloading valve according to the priority determination rule; Generate a first control signal according to the unloading valve priority, the transport belt status signal, the feeding belt status signal, the unloading valve status signal and the material level signal to control the unloading valve; A second control signal is generated based on the transport belt status signal, the feeding belt status signal, the unloading valve status signal and the material level signal to control the feeding belt.

2. A method for switching and controlling a material discharge valve according to claim 1, characterized in that: The steps for constructing the priority determination rule are: Step 2-1, obtaining a selection signal in the state signal of the unloading valve, and judging whether the unloading valve is involved in the switching according to the selection signal, if so, executing step 2-2; if not, ending; Step 2-2, obtaining the unloading valve status signal of the unloading valve involved in the switching, and reading the unloading valve opening and closing status signal, the unloading valve fault signal and the material level signal of the unloading valve status signal; Step 2-3, constructing a discharge valve screening condition according to the discharge valve opening and closing state signal, the discharge valve fault signal and the material level signal, and selecting the discharge valve that meets the condition according to the discharge valve screening condition. If the screened discharge valve is one, the priority of the discharge valve is high; if the screened discharge valves are two or more, select any one of the discharge valves according to the material level signal, and the priority of any one of the discharge valves is high.

3. A material discharge valve switching control method according to claim 2, characterized in that: Before calculating the priority of each of the unloading valves, the priority of the unloading valves needs to be initialized. The specific steps are as follows: A priority initialization judgment condition is generated according to the priority of the unloading valve and the unloading valve status signal. If the condition is true, the high priority of the unloading valve is set to no priority; if the condition is false, the operation is terminated.

4. A method for switching and controlling a material discharge valve according to claim 2, characterized in that: The material discharge valve control method is: Step 3-1, generating a valve opening judgment condition according to the priority of the unloading valve involved in the switching and the feeding belt status signal of the feeding belt corresponding to the unloading valve involved in the switching, if the condition is true, proceed to step 3-2; if the condition is false, perform fault judgment; Step 3-2, controlling the unloading valve involved in the switching to open after a delay, and outputting an unloading valve opening state signal; Step 3-3, judging whether the discharge valve is fully opened according to the discharge valve opening state signal, and if so, performing fault diagnosis, and choosing whether to execute step 3-4 according to the fault diagnosis result; if not, performing discharge valve opening fault monitoring; Step 3-4, real-time monitoring of the discharge valve opening status signal, the material level signal, the fault judgment signal and the feeding belt status signal is performed, and a valve closing judgment condition is generated according to the discharge valve opening status signal, the material level signal, the fault judgment signal and the feeding belt status signal, and whether the valve closing judgment condition is true is judged, and if so, the discharge valve is closed and the discharge valve closing status signal is output; the discharge valve closing fault is judged according to the discharge valve closing status signal; if not, the discharge valve control operation is terminated.

5. A method for switching and controlling a material discharge valve according to claim 4, characterized in that: The specific steps of the unloading valve opening fault monitoring are: Step 3-3-1-1, obtaining the opening state signal of the discharge valve, and generating a judgment condition of whether the discharge valve is fully opened according to the opening state signal of the discharge valve; Step 3-3-1-2, determine whether the condition for determining whether the discharge valve is fully opened is true, if the condition is true, perform fault determination; if the condition is false, execute step 3-3-1-3; Step 3-3-1-3, the valve opening fault timer starts timing. When the preset time is reached, if the condition is still false, execute step 3-3-1-4; if the condition is true, execute step 3-3-1-2; Step 3-3-1-4: Stop opening the valve and output a valve opening fault signal.

6. A method for switching and controlling a material discharge valve according to claim 4, characterized in that: The fault identification includes material blocking fault identification, and the specific steps are as follows: Step 3-3-2-1, constructing a material blocking fault judgment condition based on the unloading valve opening state signal, the material level signal, and the conveying belt state signal; Step 3-3-2-2, determine whether the material blocking fault judgment condition is true, if the condition is true, proceed to step 3-3-2-3; if the condition is false, perform valve closing judgment condition determination; Step 3-3-2-3, the material blocking judgment timer starts timing. When the preset time is reached, if the condition is still true, execute step 3-3-2-4; if the condition is false, execute step 3-3-2-2; Step 3-3-2-4: Output the material blocking alarm signal.

7. A material discharge valve switching control method according to claim 4, characterized in that: The specific steps for judging the failure of the unloading valve closing are as follows: Step 3-4-1, obtaining the closing state signal of the discharge valve, and generating a judgment condition of whether the discharge valve is fully closed according to the closing state signal of the discharge valve; Step 3-4-2, determine whether the closing condition of the discharge valve is true, if the condition is true, end the operation; if the condition is false, execute step 3-4-3; Step 3-4-3, the valve closing fault timer starts timing. When the preset time is reached, if the condition is still false, then execute step 3-4-4; if the condition is true, then execute step 3-4-2; Step 3-4-4: Stop closing the valve and output a valve closing fault signal.

8. A method for switching and controlling a material discharge valve according to claim 1, characterized in that: The specific steps of the feeding belt control method are: Step 4-1, obtaining the feeding belt status signal, determining whether any of the feeding belts is running, if so, executing step 4-2; if not, executing step 4-5; Step 4-2, generating a feeding belt stop condition according to the feeding belt state signal of any of the feeding belts, the unloading valve state signal of the unloading valve corresponding to any of the feeding belts, and the material level signal, and judging whether the feeding belt stop condition is true, if the condition is true, executing step 4-3; if the condition is false, ending the feeding belt control; Step 4-3, delaying the first time, and cutting off the constant control PID loop of any of the feeding belts; Step 4-4, stopping any of the feeding belts; Step 4-5: judge the interlocking condition. If the condition is true, execute step 4-6; if the condition is false, end the feeding belt control; Step 4-6, starting any one of the feeding belts; Step 4-7, resetting the selected signal of any of the feeding belts, delaying the second time to enable the constant control PID loop of any of the feeding belts.

9. A material discharge valve switching control system, characterized in that: include: Data acquisition module, used to obtain the status signal of the conveyor belt, the status signal of the ore feeding belt, the status signal of the unloading valve and the material level signal; A priority calculation module, used to generate a priority determination rule according to the unloading valve state signal and the material level signal, and calculate the priority of each unloading valve according to the priority determination rule; A valve control module, used to generate a first control signal according to the unloading valve priority, the transport belt status signal, the feeding belt status signal, the unloading valve status signal and the material level signal, and control the unloading valve; The belt control module is used to generate a second control signal based on the transport belt status signal, the feeding belt status signal, the unloading valve status signal and the material level signal to control the feeding belt.

10. A switching control device for a material discharge valve, comprising a silo, a feeding belt and a transport belt arranged in sequence; characterized in that: include: The silo has two or more discharge ports, each of which The discharge port is equipped with a set of discharge valves; each discharge valve is correspondingly equipped with a set of material level detectors; The unloading valve is interlocked and controlled; the feeding belt is interlocked and controlled.

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