CN112173724B - Control system and method for negative pressure conveying system and storage medium - Google Patents
Control system and method for negative pressure conveying system and storage medium Download PDFInfo
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- CN112173724B CN112173724B CN202010979049.1A CN202010979049A CN112173724B CN 112173724 B CN112173724 B CN 112173724B CN 202010979049 A CN202010979049 A CN 202010979049A CN 112173724 B CN112173724 B CN 112173724B
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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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
- B65G53/4608—Turnable elements, e.g. rotary wheels with pockets or passages for material
Abstract
The invention discloses a control system for a negative pressure conveying system, which comprises a feeding bin, a feeding star-shaped discharge valve, a bin body, a discharging star-shaped discharge valve, a temporary storage bin, a filter core, a PLC (programmable logic controller) module, a first differential pressure gauge, a pressure transmitter and a negative pressure fan, wherein the feeding bin is provided with a feeding inlet, a feeding star-shaped discharge valve and a bin body; the PLC module controls the work of the negative pressure fan, the feeding star-shaped discharge valve and the discharging star-shaped discharge valve to convey materials to the temporary storage bin for temporary storage through the feeding bin, the feeding star-shaped discharge valve, the bin body and the discharging star-shaped discharge valve in sequence; meanwhile, the PLC module detects the differential pressure at the inlet and outlet of the discharging star-shaped discharging valve according to the first differential pressure gauge, the pressure transmitter detects the air pressure in the air negative pressure pipe to control the working frequency of the negative pressure fan, the feeding frequency of the feeding star-shaped discharging valve and the discharging frequency of the discharging star-shaped discharging valve, and judges whether the discharging star-shaped discharging valve is abnormal or not. The invention also provides a control method and a storage medium for the negative pressure conveying system.
Description
Technical Field
The invention relates to a negative pressure production line in the powder industry, in particular to a control system and method for a negative pressure conveying system and a storage medium.
Background
At present, in a continuous powder negative pressure conveying production line, a high material level frequent alarm can be caused when a discharging star-shaped discharging valve of a negative pressure feeder discharges unsmooth materials, a series of chain reactions such as permeation descending of a filter element of the discharging valve, unit negative pressure rising and the like are caused, so that a negative pressure conveying system is unstable, and the requirement that the negative pressure production line cannot convey powder is met. When the negative pressure conveying system breaks down, manual troubleshooting is generally adopted, however, the reason that equipment failure can be detected after equipment is required to be disassembled through manual troubleshooting, the equipment is required to be disassembled to stop working, and meanwhile, the equipment is time-consuming and labor-consuming to disassemble, and the production benefit is seriously influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a control system for a negative pressure conveying system, which can solve the problems that in the prior art, when the fault maintenance is carried out through manual maintenance, the troubleshooting time is long, the production benefit is influenced, and the like.
The second purpose of the invention is to provide a control method for a negative pressure conveying system, which can solve the problems that in the prior art, when the fault maintenance in the negative pressure conveying system is carried out through manual maintenance, the troubleshooting time is long, the production benefit is influenced, and the like.
The invention further aims to provide a storage medium which can solve the problems that in the prior art, when the fault maintenance is carried out through manual maintenance, the fault troubleshooting time is long, the production benefit is influenced and the like.
One of the purposes of the invention is realized by adopting the following technical scheme:
a control system for a negative pressure conveying system comprises a feeding bin, a feeding star-shaped discharge valve, a bin body, a discharging star-shaped discharge valve, a temporary storage bin, a filter element, a PLC (programmable logic controller) module, a first differential pressure gauge, a pressure transmitter and a negative pressure fan; the feeding bin is communicated with a feeding port of the bin body through a feeding star-shaped discharge valve and is used for conveying materials into the bin body through the feeding bin and the feeding star-shaped discharge valve; the discharge port of the bin body is communicated with the inlet of a discharging star-shaped discharge valve, the outlet of the discharging star-shaped discharge valve is communicated with the temporary storage bin, and the materials in the bin body are conveyed to the temporary storage bin through the discharging star-shaped discharge valve for temporary storage;
the filter element is arranged at the top of the bin body and is communicated with the bin body, and the filter element is communicated with the negative pressure fan through a negative pressure air pipe; the first differential pressure gauge is arranged on the discharging star-shaped discharge valve and used for detecting the differential pressure of an inlet and an outlet of the discharging star-shaped discharge valve; the pressure transmitter is arranged on the negative pressure air pipe and used for detecting the negative pressure in the negative pressure air pipe;
the first differential pressure gauge, the negative pressure fan, the pressure transmitter, the feeding star-shaped discharge valve and the discharging star-shaped discharge valve are respectively and electrically connected with the PLC module; the PLC module is used for controlling and starting the work of the negative pressure fan, further conveying gas into the bin body through the negative pressure air pipe and the filter element, changing the air pressure in the bin body, and simultaneously starting the feeding star-shaped discharge valve and the discharging star-shaped discharge valve to convey materials to the temporary storage bin for temporary storage through the feeding bin, the feeding star-shaped discharge valve, the bin body and the discharging star-shaped discharge valve in sequence; the PLC module is also used for receiving the differential pressure of the inlet and the outlet of the discharging star-shaped discharging valve detected by the first differential pressure gauge in real time, the working frequency of the air pressure control negative pressure fan in the air negative pressure pipe detected by the pressure transmitter, the feeding frequency of the feeding star-shaped discharging valve and the discharging frequency of the discharging star-shaped discharging valve in discharging in real time, and detecting whether the discharging star-shaped discharging valve is abnormal or not according to the differential pressure of the inlet and the outlet of the discharging star-shaped discharging valve detected by the first differential pressure gauge.
Furthermore, a feeding pneumatic ball valve is arranged between the feeding star-shaped discharge valve and the feeding port of the bin body, and the feeding pneumatic ball valve is used for controlling the on-off between the feeding star-shaped discharge valve and the feeding port of the bin body.
Furthermore, a connecting seat is arranged between the discharging star-shaped discharge valve and the temporary storage bin; one end of the connecting seat is communicated with an outlet of the discharging star-shaped discharging valve, and one end of the connecting seat is communicated with an inlet of the temporary storage bin.
Furthermore, the control system comprises a material level switch, and the material level switch is arranged at the material limiting position of the bin body and is electrically connected with the PLC module; the PLC module is used for receiving detection data of the limit switch and sending out early warning prompts when the limit switch detects materials.
Further, the control system comprises a second differential pressure gauge, and the second differential pressure gauge is arranged on the filter element and used for detecting the differential pressure of the inlet and the outlet of the filter element; the PLC module is electrically connected with the second differential pressure gauge and is used for receiving differential pressure of an inlet and an outlet of the filter element detected by the second differential pressure gauge, detecting whether the filter element is abnormal or not according to the differential pressure of the inlet and the outlet of the filter element, and controlling the working state of the negative pressure fan according to the pressure value of the negative pressure air pipe detected by the negative pressure transmitter.
Further, the inlet of the feeding bin is communicated with the converter discharging equipment and is used for conveying materials in the converter discharging equipment to the feeding bin.
The second purpose of the invention is realized by adopting the following technical scheme:
a control method for a negative pressure delivery system, applied to a control system for a negative pressure delivery system as employed in one of the objects of the present invention, the control method comprising:
an initialization step: when the system is started, the PLC module is used for starting and controlling the work of the negative pressure fan, so that negative pressure is generated in the system, the system enters an idle running state, and meanwhile, the PLC module is used for recording the frequency of the negative pressure fan, the differential pressure of the inlet and the outlet of the discharging star-shaped discharge valve detected by the first differential pressure gauge and the air pressure value in the negative pressure air pipe detected by the pressure transmitter;
a starting step: the PLC module controls and starts a feeding star-shaped discharge valve and a discharging star-shaped discharge valve, and materials in a feeding bin are conveyed to a temporary storage bin for temporary storage through the feeding star-shaped discharge valve, a bin body and the discharging star-shaped discharge valve in sequence under the action of negative pressure of the system;
the control steps are as follows: the feeding frequency of the feeding star-shaped discharge valve is regulated according to a preset rule through the control of the PLC module, and meanwhile, the discharging frequency of the discharging star-shaped discharge valve, the differential pressure of an inlet and an outlet of the discharging star-shaped discharge valve detected by a first differential pressure gauge and the air pressure value in a negative pressure air pipe detected by a fan transmitter are recorded and stored in the system each time of regulation;
a fault judgment step: and judging whether the discharge star-shaped discharge valve is abnormal or not through the PLC module according to the differential pressure of the inlet and the outlet of the discharge star-shaped discharge valve detected by the first differential pressure gauge.
Further, the fault determining step further includes: the detection data of the limit switch is obtained through the PLC module to judge the capacity of the materials in the bin body, and when the limit switch detects the materials, an early warning prompt is sent out; the limit switch is arranged at the material limit position of the bin body.
Further, the fault determining step includes: judging whether the filter element is abnormal or not through the PLC module according to the differential pressure of the inlet and the outlet of the filter element detected by the second differential pressure gauge; the second differential pressure gauge is arranged on the filter element and used for detecting the differential pressure of the inlet and the outlet of the filter element.
The third purpose of the invention is realized by adopting the following technical scheme:
a storage medium which is a computer-readable storage medium having stored thereon a control program which is a computer program that, when executed by a processor, implements the steps of a control method for a negative pressure delivery system as adopted for the second object of the present invention.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the first differential pressure gauge is arranged on the star-shaped discharge valve of the negative pressure conveying system to detect the differential pressure at the inlet and the outlet of the star-shaped discharge valve, so that the abnormal detection of the star-shaped discharge valve is realized by combining the negative pressure control of the negative pressure conveying system, the problems of time and labor waste and the like when the star-shaped discharge valve is in fault and equipment fault reasons are checked through manually disassembling the equipment in the negative pressure conveying system are greatly improved, the fault checking time is greatly shortened, meanwhile, the fault checking can be completed without disassembling the equipment, the maintained equipment can be quickly recovered to a normal working state, and the production efficiency is improved.
Drawings
Fig. 1 is a schematic block connection diagram of a control system for a negative pressure delivery system according to the present invention.
In the figure: 11. a feeding bin; 12. a feeding star-shaped discharge valve; 13. a feeding pneumatic ball valve; 21. a bin body; 22. a discharge star-shaped discharge valve; 23. a filter element; 24. a temporary storage bin; 25. a connecting seat; 31. a PLC module; 32. a first differential pressure gauge; 33. a negative pressure fan; 34. a pressure transmitter; 35. a second differential pressure gauge; 36. and a limit switch.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
Example one
According to the invention, the differential pressure gauge is added on the star-shaped discharge valve in the existing negative pressure conveying system, the running state of the star-shaped discharge valve is monitored in real time through the differential pressure gauge, and the detection data is uploaded to the system controller, so that the system controller judges whether the star-shaped discharge valve is abnormal according to the detection data of the differential pressure gauge, and timely sends a maintenance prompt to a maintenance worker when the abnormality exists, thereby solving the problems that time and labor are wasted, the production efficiency is influenced and the like when the fault reason of the discharge valve needs to be checked through manually disassembling equipment in the prior art.
The present invention provides a preferred embodiment, a control system for a negative pressure delivery system, as shown in fig. 1, comprising a feed input section, a discharge output section, and a negative pressure control system.
The feeding input part is used for being communicated with external feeding equipment and used for storing and conveying external materials to the discharging part. The discharging part conveys materials to the discharging output part for temporary storage under the action of the negative pressure control system. The negative pressure control system is a control center and a power center of the system, and the negative pressure control system controls the work of each part of the feeding input part, the discharging part and the discharging output part to realize the conveying of materials.
Preferably, the feed input section comprises a feed bin 11 and a feed star-shaped discharge valve 12.
The inlet of the feed bin 11 is connected to an external converter discharge device for feeding the material from the converter discharge device to the feed bin 11 for storage. The outlet of the feeding bin 11 is communicated with the inlet of a feeding star-shaped discharge valve 12, and the outlet of the feeding star-shaped discharge valve 12 is communicated with a discharging part. And a feeding star-shaped discharge valve 12 for conveying the materials in the feeding bin 11 to a discharging part. Preferably, the feed star discharge valve 12 has a feed frequency, different feed frequencies differing in the amount of material delivered to the discharge section. Through the feeding frequency of the feeding star-shaped discharge valve 12, the accurate control of the conveying capacity of the material conveyed to the discharge part is realized, the stable operation of the system is ensured, and the problems that the system is blocked due to the overlarge conveying capacity of the material or the system idles due to the undersize conveying capacity of the material are solved.
Wherein, the feeding star-shaped discharge valve 12 is electrically connected with the negative pressure control system and is used for conveying the materials to the discharge part under the action of the negative pressure control system.
Preferably, the feed input section comprises a feed pneumatic ball valve 13. And the feeding pneumatic ball valve 13 is arranged between the feeding star-shaped discharge valve 12 and the discharge part and is used for controlling the on-off between the feeding star-shaped discharge valve 12 and the discharge part. Namely: when the negative pressure control system starts to work, the feeding star-shaped discharge valve 12 is started, and materials in the feeding bin 11 are conveyed to a discharge end through the feeding star-shaped discharge valve 12 and the feeding pneumatic ball valve 13 in a state that the feeding pneumatic ball valve 13 is opened. When the pneumatic ball valve 13 is disconnected, the feeding part is not communicated with the discharging part, and the materials are not conveyed to the discharging part.
Preferably, the discharge portion comprises a bin body 21, a discharge star-shaped discharge valve 22, a temporary storage bin 24 and a filter element 23.
The feeding port of the bin body 21 is communicated with the feeding pneumatic ball valve 13 of the feeding input part, the discharging port is communicated with the temporary storage bin 24 through the discharging star-shaped discharge valve 22, and the feeding port is used for conveying materials input into the bin body 21 by the feeding input part to the temporary storage bin 24 through the discharging star-shaped discharge valve 22 for temporary storage.
Preferably, the filter element 23 is disposed on the top of the bin body 21 and is communicated with the bin body 21, so as to convey gas into the bin body 21, thereby realizing air pressure control on the bin body 21, i.e. generating negative pressure in the system. Therefore, under the action of the negative pressure of the system, the materials in the bin body 21 are conveyed from the discharge port of the bin body 21 to the discharging star-shaped discharge valve 22 and further conveyed to the temporary storage bin 24 for temporary storage.
Wherein, the discharging star-shaped discharge valve 22 is electrically connected with the negative pressure control system and works under the control of the negative pressure control system.
Preferably, the negative pressure control system includes a PLC (Programmable Logic Controller) module 31, a star-type discharging differential pressure gauge, a pressure transmitter 34, a negative pressure air pipe and a negative pressure fan 33.
Wherein, pressure transmitter 34, first differential pressure gauge 32, negative pressure fan 33, feeding star type discharge valve 12, row material star type discharge valve 22 are connected with PLC module 31 electrical behavior respectively.
Wherein, the filter element 23 is communicated with the negative pressure fan 33 through a negative pressure air pipe. The pressure transmitter 34 is disposed on the negative pressure air pipe for detecting the negative pressure in the negative pressure air pipe. The first differential pressure gauge 32 is installed on the discharging star-shaped discharge valve 22 and is used for detecting the differential pressure at the inlet and the outlet of the discharging star-shaped discharge valve 22. Preferably, one end of the first differential pressure gauge 32 is disposed at the inlet of the discharge star discharge valve 22 and one end is disposed at the outlet of the discharge star discharge valve 22.
The PLC module 31 is configured to receive negative pressure in the negative pressure air pipe detected by the pressure transmitter 34, detect differential pressure at an inlet and an outlet of the discharging star-shaped discharge valve 22 by the first differential pressure gauge 32, and control feeding frequencies of the feeding star-shaped discharge valve 12 and the discharging star-shaped discharge valve 22, so as to realize a conveying amount of a material entering the storage bin 21 from the feeding bin 11 and a conveying amount of a material entering the temporary storage bin 24 from the feeding bin.
Preferably, when the system is initialized, a control closed loop is formed by the filter element 23, the bin body 21, the material discharging star-shaped discharge valve 22, the temporary storage bin 24, the PLC module 31, the negative pressure fan 33, the pressure transmitter 34 and the negative pressure air pipe. The work of the negative pressure fan 33 is started through the PLC module 31, so that a negative pressure is formed in the control closed loop, and the system is in an idle running state.
After the negative pressure of the system is formed, the feeding star-shaped discharge valve 12 is started through the PLC module 31, the materials in the feeding bin 11 enter the bin body 21 through the feeding star-shaped discharge valve 12 and the feeding pneumatic ball valve 13 in the state that the feeding pneumatic ball valve 13 is opened, and under the action of the negative pressure, the materials entering the bin body 21 enter the temporary storage bin 24 through the discharging star-shaped discharge valve 22 to be temporarily stored, so that the materials are conveyed.
Meanwhile, in order to ensure the stable operation of the system, when the system enters an idle running state, the PLC module 31 further receives the initial negative pressure in the negative pressure air pipe detected by the pressure transmitter 34, the initial differential pressure at the inlet and outlet of the discharging star-shaped discharge valve 22 detected by the first differential pressure gauge 32, and the operating frequency of the negative pressure fan 33, and stores the operating frequency in the system.
After the PLC module 31 starts the feeding star-shaped discharge valve 12, the feeding frequency of the feeding star-shaped discharge valve 12 is gradually adjusted according to the preset rule of the system to adjust the conveying capacity of the material to the corresponding conveying capacity: m1、M2、…….：
Simultaneously, all record the feeding frequency of arranging material star type discharge valve 22 through PLC module 31 during every turn of adjustment: f. of1、f2… …, detection value of pressure transmitter 34: pQ1、PQ2… …, detecting value of differential pressure gauge of discharging star-shaped discharging valve 22: pX1、PX2… …, thereby the PLC module 31 adjusts the feeding frequency of the feeding star-shaped discharge valve 12 and the working frequency of the wind pressure fan according to the data, and simultaneously adjusts the supply of the matched materials, and realizes the stable work of the negative pressure conveying system. That is, the present invention realizes the adjustment of the material conveying amount of the feeding star-shaped discharge valve 12 at the front end and the jump of the working frequency of the negative pressure fan 33 by the closed-loop control of the PLC module 31, and ensures the stable operation of the negative pressure conveying system.
Preferably, PLC module 31 still judges through the differential pressure to the row material star type discharge valve 22 that detects of first differential pressure gauge 32 exit whether arrange material star type discharge valve 22 unusual, if, then sends the early warning suggestion through corresponding early warning device to maintainer overhauls row material star type discharge valve 22 in time, has solved the trouble reason that needs look over equipment through artifical dismantlement equipment among the prior art.
Generally, when the discharge star-shaped discharge valve 22 abnormally operates, the differential pressure at the inlet and the outlet of the discharge star-shaped discharge valve 22 changes. For example, the differential pressure at the inlet and outlet of the discharging star-shaped discharge valve 22 can be changed by too large a gap, too much air leakage, and small pressure loss of the discharging star-shaped discharge valve 22. Preferably, the abnormal judgment of the discharging star-shaped discharging valve 22 can be performed by setting a judgment logic in the PLC module 31 in advance according to the actual operating condition, and then performing a matching judgment.
Consequently, when PLC module 31 detected that the current differential pressure of arranging material star type discharge valve 22 and importing and exporting is less than the setting value, then think that row material star type discharge valve 22 is unusual, send early warning maintenance suggestion through corresponding early warning equipment to in time maintain row material star type discharge valve 22, solved among the prior art and carried out detection device trouble reason through artifical dismantlement equipment and lead to cost of maintenance height, maintenance duration long, reduction production efficiency scheduling problem. Through the automatic maintenance of the unusual of arranging material star type discharge valve 22, in time send and overhaul the suggestion, immediately rent the maintenance to examine or change new row material star type discharge valve 22, alleviated the troubleshooting time greatly, guaranteed that the negative pressure carries the material quick recovery, guarantee production efficiency.
The invention can be applied to a continuous negative pressure conveying production line, can effectively monitor the running state of the star-shaped discharge valve, and regulates the common work of other equipment by combining PLC closed-loop control logic, thereby greatly improving the stability of a negative pressure conveying system and greatly improving the production efficiency. Meanwhile, the star-shaped discharge valve can be monitored in real time, and the fault reason can be judged within 1-10 s, so that the fault troubleshooting time is greatly saved, and the operation and maintenance cost is reduced.
Preferably, the control system also comprises a third differential pressure gauge for detecting the pressure at the inlet and outlet of the star-shaped discharge valve 12 for feeding. The PLC module 31 is electrically connected with the third differential pressure gauge and used for judging the abnormal condition of the feeding star-shaped discharge valve 12 according to the pressure of the inlet and the outlet of the feeding star-shaped discharge valve 12 detected by the third differential pressure gauge.
Preferably, the control system includes a limit switch 36. The limit switch 36 is installed at the material limit position of the bin body 21 and used for detecting the volume of the material in the bin body 21. The material limiting position is the maximum capacity of the materials of the bin body 21 allowed by the system, and the limit switch 36 is arranged to detect the maximum capacity of the materials, so that the situation that the filter element 23 is blocked due to excessive materials in the bin body 21 to influence the safe operation of the system is avoided.
When the PLC module 31 detects that the material reaches the material limit position according to the limit switch 36, an early warning signal is sent to the corresponding early warning device to perform early warning, and meanwhile, the conveying capacity of the material entering the bin body 21 is reduced by controlling the feeding frequency of the feeding star-shaped discharge valve 12, so that excessive material is prevented from entering the bin body 21.
Preferably, the present embodiment further includes a second differential pressure gauge 35. The second differential pressure gauge 35 is attached to the filter element 23 and detects a differential pressure between an inlet and an outlet of the filter element 23. The second differential pressure gauge 35 is electrically connected to the PLC module 31, and is configured to upload differential pressure at an inlet and an outlet of the filter element 23 to the PLC module 31, so that the PLC module 31 controls operating states of each device in the system in combination with other detection data. Preferably, one end of the second differential pressure gauge 35 is provided at the inlet of the filter element 23, and the other end is provided at the outlet of the filter element 23.
When the system is started, the PLC module 31 also receives the initial differential pressure at the inlet and outlet of the filter element 23 detected by the second differential pressure gauge 35 and stores the initial differential pressure in the system when the system enters an idle running state.
In addition, after the PLC module 31 starts the feeding star-shaped discharge valve 12, when the feeding frequency of the feeding star-shaped discharge valve 12 is gradually adjusted according to the preset rule of the system to adjust the conveying amount of the material to the corresponding conveying amount, the difference of the inlet and the outlet of the filter element 23 detected by the second differential pressure gauge 35 is synchronously recorded and stored in the system.
Preferably, a connecting seat 25 is further arranged between the discharging star-shaped discharging valve 22 and the temporary storage bin 24, and the discharging star-shaped discharging valve 22 is communicated with the temporary storage bin 24 through the connecting seat 25 to convey the materials in the bin body 21 to the temporary storage bin 24 for temporary storage.
Example two
Based on the first embodiment, the invention also provides another embodiment, and the control method for monitoring the star-shaped discharge valve of the negative pressure conveying production line comprises the following steps:
initializing, when the system is started, starting and controlling the work of a negative pressure fan through a PLC module, further enabling the system to generate negative pressure to enter an idle running state, and simultaneously recording the frequency of the negative pressure fan, the differential pressure of an inlet and an outlet of a discharging star-shaped discharge valve detected by a first differential pressure gauge and the air pressure value in a negative pressure air pipe detected by a pressure transmitter through the PLC module;
the method comprises the steps of starting, controlling and starting a feeding star-shaped discharge valve and a discharging star-shaped discharge valve through a PLC module, and conveying materials in a feeding bin to a temporary storage bin for temporary storage through the feeding star-shaped discharge valve, a bin body and the discharging star-shaped discharge valve in sequence under the action of negative pressure of a system;
the control step S3 includes that the PLC module is used for controlling and adjusting the feeding frequency of the feeding star-shaped discharge valve according to preset rules, and meanwhile, the discharging frequency of the discharging star-shaped discharge valve, the differential pressure of the inlet and the outlet of the discharging star-shaped discharge valve detected by the first differential pressure gauge and the air pressure value in the negative pressure air pipe detected by the fan transmitter are recorded and stored in the system each time of adjustment;
and an abnormity judgment step, judging whether the discharging star-shaped discharging valve is abnormal or not through the PLC module according to the differential pressure of the inlet and the outlet of the discharging star-shaped discharging valve detected by the first differential pressure gauge.
Further, the abnormality determining step further includes: the detection data of the limit switch is obtained through the PLC module to judge the capacity of the materials in the bin body, and when the limit switch detects the materials, an early warning prompt is sent out; the limit switch is arranged at the material limit position of the bin body.
Further, the abnormality determining step further includes: judging whether the filter element is abnormal or not through the PLC module according to the differential pressure of the inlet and the outlet of the filter element detected by the second differential pressure gauge; the second differential pressure gauge is arranged on the filter element and used for detecting the differential pressure of the inlet and the outlet of the filter element.
EXAMPLE III
The present invention also provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is a control program, and the processor implements the following steps when executing the control program:
an initialization step: when the system is started, the PLC module is used for starting and controlling the work of the negative pressure fan, so that negative pressure is generated in the system, the system enters an idle running state, and meanwhile, the PLC module is used for recording the frequency of the negative pressure fan, the differential pressure of the inlet and the outlet of the discharging star-shaped discharge valve detected by the first differential pressure gauge and the air pressure value in the negative pressure air pipe detected by the pressure transmitter;
a starting step: the PLC module controls and starts a feeding star-shaped discharge valve and a discharging star-shaped discharge valve, and materials in a feeding bin are conveyed to a temporary storage bin for temporary storage through the feeding star-shaped discharge valve, a bin body and the discharging star-shaped discharge valve in sequence under the action of negative pressure of the system;
the control steps are as follows: the feeding frequency of the feeding star-shaped discharge valve is regulated according to a preset rule through the control of the PLC module, and meanwhile, the discharging frequency of the discharging star-shaped discharge valve, the differential pressure of an inlet and an outlet of the discharging star-shaped discharge valve detected by a first differential pressure gauge and the air pressure value in a negative pressure air pipe detected by a fan transmitter are recorded and stored in the system each time of regulation;
a fault judgment step: and judging whether the discharge star-shaped discharge valve is abnormal or not through the PLC module according to the differential pressure of the inlet and the outlet of the discharge star-shaped discharge valve detected by the first differential pressure gauge.
Further, the fault determining step further includes: the detection data of the limit switch is obtained through the PLC module to judge the capacity of the materials in the bin body, and when the limit switch detects the materials, an early warning prompt is sent out; the limit switch is arranged at the material limit position of the bin body.
Further, the fault determining step includes: judging whether the filter element is abnormal or not through the PLC module according to the differential pressure of the inlet and the outlet of the filter element detected by the second differential pressure gauge; (ii) a The second differential pressure gauge is arranged on the filter element and used for detecting the differential pressure of the inlet and the outlet of the filter element.
Example four
A storage medium which is a computer-readable storage medium having a control program stored thereon, the control program being a computer program which, when executed by a processor, implements the steps of:
an initialization step: when the system is started, the PLC module is used for starting and controlling the work of the negative pressure fan, so that negative pressure is generated in the system, the system enters an idle running state, and meanwhile, the PLC module is used for recording the frequency of the negative pressure fan, the differential pressure of the inlet and the outlet of the discharging star-shaped discharge valve detected by the first differential pressure gauge and the air pressure value in the negative pressure air pipe detected by the pressure transmitter;
a starting step: the PLC module controls and starts a feeding star-shaped discharge valve and a discharging star-shaped discharge valve, and materials in a feeding bin are conveyed to a temporary storage bin for temporary storage through the feeding star-shaped discharge valve, a bin body and the discharging star-shaped discharge valve in sequence under the action of negative pressure of the system;
the control steps are as follows: the feeding frequency of the feeding star-shaped discharge valve is regulated according to a preset rule through the control of the PLC module, and meanwhile, the discharging frequency of the discharging star-shaped discharge valve, the differential pressure of an inlet and an outlet of the discharging star-shaped discharge valve detected by a first differential pressure gauge and the air pressure value in a negative pressure air pipe detected by a fan transmitter are recorded and stored in the system each time of regulation;
a fault judgment step: and judging whether the discharge star-shaped discharge valve is abnormal or not through the PLC module according to the differential pressure of the inlet and the outlet of the discharge star-shaped discharge valve detected by the first differential pressure gauge.
Further, the fault determining step further includes: the detection data of the limit switch is obtained through the PLC module to judge the capacity of the materials in the bin body, and when the limit switch detects the materials, an early warning prompt is sent out; the limit switch is arranged at the material limit position of the bin body.
Further, the fault determining step includes: judging whether the filter element is abnormal or not through the PLC module according to the differential pressure of the inlet and the outlet of the filter element detected by the second differential pressure gauge; the second differential pressure gauge is arranged on the filter element and used for detecting the differential pressure of the inlet and the outlet of the filter element.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (9)
1. A control system for a negative pressure conveying system is characterized by comprising a feeding bin, a feeding star-shaped discharge valve, a bin body, a discharging star-shaped discharge valve, a temporary storage bin, a filter element, a PLC (programmable logic controller) module, a first differential pressure meter, a pressure transmitter and a negative pressure fan; the feeding bin is communicated with a feeding port of the bin body through a feeding star-shaped discharge valve and is used for conveying materials into the bin body through the feeding bin and the feeding star-shaped discharge valve; the discharge port of the bin body is communicated with the inlet of a discharging star-shaped discharge valve, the outlet of the discharging star-shaped discharge valve is communicated with the temporary storage bin, and the materials in the bin body are conveyed to the temporary storage bin through the discharging star-shaped discharge valve for temporary storage;
the filter element is arranged at the top of the bin body and is communicated with the bin body, and the filter element is communicated with the negative pressure fan through a negative pressure air pipe; the first differential pressure gauge is arranged on the discharging star-shaped discharge valve and used for detecting the differential pressure of an inlet and an outlet of the discharging star-shaped discharge valve; the pressure transmitter is arranged on the negative pressure air pipe and used for detecting the negative pressure in the negative pressure air pipe;
the first differential pressure gauge, the negative pressure fan, the pressure transmitter, the feeding star-shaped discharge valve and the discharging star-shaped discharge valve are respectively and electrically connected with the PLC module; the PLC module is used for controlling and starting the work of the negative pressure fan, further conveying gas into the bin body through the negative pressure air pipe and the filter element, changing the air pressure in the bin body, and simultaneously starting the feeding star-shaped discharge valve and the discharging star-shaped discharge valve to convey materials to the temporary storage bin for temporary storage through the feeding bin, the feeding star-shaped discharge valve, the bin body and the discharging star-shaped discharge valve in sequence; the PLC module is also used for receiving the differential pressure of the inlet and outlet of the discharging star-shaped discharging valve detected by the first differential pressure gauge in real time, the working frequency of the air pressure control negative pressure fan, the feeding frequency of the feeding star-shaped discharging valve and the discharging frequency of the discharging star-shaped discharging valve detected by the pressure transmitter in the air negative pressure pipe, and detecting whether the discharging star-shaped discharging valve is abnormal or not according to the differential pressure of the inlet and outlet of the discharging star-shaped discharging valve detected by the first differential pressure gauge; the control system comprises a second differential pressure gauge, and the second differential pressure gauge is arranged on the filter element and used for detecting the differential pressure of the inlet and the outlet of the filter element; the PLC module is electrically connected with the second differential pressure gauge and is used for receiving differential pressure of an inlet and an outlet of the filter element detected by the second differential pressure gauge, detecting whether the filter element is abnormal or not according to the differential pressure of the inlet and the outlet of the filter element, and controlling the working state of the negative pressure fan according to the pressure value of the negative pressure air pipe detected by the negative pressure transmitter.
2. The control system of claim 1, wherein a feed pneumatic ball valve is disposed between the feed star discharge valve and the inlet port of the silo body, said feed pneumatic ball valve controlling the opening and closing of the feed star discharge valve and the inlet port of the silo body.
3. The control system for the negative pressure conveying system according to claim 1, wherein a connecting seat is arranged between the discharging star-shaped discharge valve and the temporary storage bin; one end of the connecting seat is communicated with an outlet of the discharging star-shaped discharging valve, and one end of the connecting seat is communicated with an inlet of the temporary storage bin.
4. The control system for the negative pressure conveying system according to claim 1, wherein the control system comprises a material level switch, and the material level switch is mounted on a material limit position of the bin body and is electrically connected with the PLC module; the PLC module is used for receiving detection data of the limit switch and sending out early warning prompts when the limit switch detects materials.
5. A control system for a negative pressure delivery system according to claim 1, wherein the inlet of the feed bin is in communication with a converter discharge apparatus for delivering material from the converter discharge apparatus to the feed bin.
6. A control method for a negative pressure delivery system, applied to a control system for a negative pressure delivery system according to any one of claims 1 to 5, characterized by comprising:
an initialization step: when the system is started, the PLC module is used for starting and controlling the work of the negative pressure fan, so that negative pressure is generated in the system, the system enters an idle running state, and meanwhile, the PLC module is used for recording the frequency of the negative pressure fan, the differential pressure of the inlet and the outlet of the discharging star-shaped discharge valve detected by the first differential pressure gauge and the air pressure value in the negative pressure air pipe detected by the pressure transmitter;
a starting step: the PLC module controls and starts a feeding star-shaped discharge valve and a discharging star-shaped discharge valve, and materials in a feeding bin are conveyed to a temporary storage bin for temporary storage through the feeding star-shaped discharge valve, a bin body and the discharging star-shaped discharge valve in sequence under the action of negative pressure of the system;
the control steps are as follows: the feeding frequency of the feeding star-shaped discharge valve is regulated according to a preset rule through the control of the PLC module, and meanwhile, the discharging frequency of the discharging star-shaped discharge valve, the differential pressure of an inlet and an outlet of the discharging star-shaped discharge valve detected by a first differential pressure gauge and the air pressure value in a negative pressure air pipe detected by a fan transmitter are recorded and stored in the system each time of regulation;
a fault judgment step: and judging whether the discharge star-shaped discharge valve is abnormal or not through the PLC module according to the differential pressure of the inlet and the outlet of the discharge star-shaped discharge valve detected by the first differential pressure gauge.
7. The control method for the negative pressure delivery system according to claim 6, wherein the failure determination step further comprises: the detection data of the limit switch is obtained through the PLC module to judge the capacity of the materials in the bin body, and when the limit switch detects the materials, an early warning prompt is sent out; the limit switch is arranged at the material limit position of the bin body.
8. The control method for the negative pressure delivery system according to claim 6, wherein the failure determination step includes: judging whether the filter element is abnormal or not through the PLC module according to the differential pressure of the inlet and the outlet of the filter element detected by the second differential pressure gauge; the second differential pressure gauge is arranged on the filter element and used for detecting the differential pressure of the inlet and the outlet of the filter element.
9. A storage medium that is a computer-readable storage medium having a control program stored thereon, the control program being a computer program, characterized in that: the control program realizing the steps of a control method for a negative pressure delivery system according to any one of claims 6-8 when executed by a processor.
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009848A (en) * | 2009-09-08 | 2011-04-13 | 镇江市电站辅机厂 | Positive-negative integrated conveying system device of multifunctional pump |
| CN202492151U (en) * | 2012-02-03 | 2012-10-17 | 济南大学 | Pneumatic conveying branch pipeline flow testing device |
| CN104512727A (en) * | 2013-09-30 | 2015-04-15 | 宁夏嘉翔自控技术有限公司 | Pneumatic flour transmitting system |
| CN104609188A (en) * | 2015-01-26 | 2015-05-13 | 杭州天丰润滑油有限公司 | Automatic feeding system for powder materials on vacuum condition |
| CN105129430A (en) * | 2015-07-20 | 2015-12-09 | 江苏锐升新材料有限公司 | PVC ingredient conveying system used for PVC floor production line and application of PVC ingredient conveying system |
| CN205602705U (en) * | 2016-05-03 | 2016-09-28 | 苏州中材建设有限公司 | Back feedback automatic control system of open air conveying steady operation of malleation |
| CN107032124A (en) * | 2016-11-30 | 2017-08-11 | 江苏大学 | A kind of batch (-type) powder negative-pressure pneumatic transmission system and method |
| CN107226353A (en) * | 2016-03-25 | 2017-10-03 | 宝山钢铁股份有限公司 | It is a kind of from dredging material-transporting system and its from dredging method |
| CN108016883A (en) * | 2016-11-02 | 2018-05-11 | 建浩Enc股份有限公司 | Powder conveying device |
| CN108726179A (en) * | 2017-04-24 | 2018-11-02 | 科倍隆有限公司 | Method for pneumatic conveying plastic grain |
| CN109928215A (en) * | 2019-04-16 | 2019-06-25 | 中冶赛迪技术研究中心有限公司 | A kind of balk cargo pneumatic conveying experimental provision and method |
| CN110104441A (en) * | 2019-04-30 | 2019-08-09 | 大唐国际发电股份有限公司陡河发电厂 | The defeated grey stored program controlled of boiler dry ash handling system |
| CN110104439A (en) * | 2019-06-04 | 2019-08-09 | 魏志晓 | A kind of powder negative pressure feeder |
| CN111410042A (en) * | 2020-05-07 | 2020-07-14 | 西安华电清洁能源技术有限公司 | Anti-blocking energy-saving system and method suitable for powder conveying system |
-
2020
- 2020-09-17 CN CN202010979049.1A patent/CN112173724B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009848A (en) * | 2009-09-08 | 2011-04-13 | 镇江市电站辅机厂 | Positive-negative integrated conveying system device of multifunctional pump |
| CN202492151U (en) * | 2012-02-03 | 2012-10-17 | 济南大学 | Pneumatic conveying branch pipeline flow testing device |
| CN104512727A (en) * | 2013-09-30 | 2015-04-15 | 宁夏嘉翔自控技术有限公司 | Pneumatic flour transmitting system |
| CN104609188A (en) * | 2015-01-26 | 2015-05-13 | 杭州天丰润滑油有限公司 | Automatic feeding system for powder materials on vacuum condition |
| CN105129430A (en) * | 2015-07-20 | 2015-12-09 | 江苏锐升新材料有限公司 | PVC ingredient conveying system used for PVC floor production line and application of PVC ingredient conveying system |
| CN107226353A (en) * | 2016-03-25 | 2017-10-03 | 宝山钢铁股份有限公司 | It is a kind of from dredging material-transporting system and its from dredging method |
| CN205602705U (en) * | 2016-05-03 | 2016-09-28 | 苏州中材建设有限公司 | Back feedback automatic control system of open air conveying steady operation of malleation |
| CN108016883A (en) * | 2016-11-02 | 2018-05-11 | 建浩Enc股份有限公司 | Powder conveying device |
| CN107032124A (en) * | 2016-11-30 | 2017-08-11 | 江苏大学 | A kind of batch (-type) powder negative-pressure pneumatic transmission system and method |
| CN108726179A (en) * | 2017-04-24 | 2018-11-02 | 科倍隆有限公司 | Method for pneumatic conveying plastic grain |
| CN109928215A (en) * | 2019-04-16 | 2019-06-25 | 中冶赛迪技术研究中心有限公司 | A kind of balk cargo pneumatic conveying experimental provision and method |
| CN110104441A (en) * | 2019-04-30 | 2019-08-09 | 大唐国际发电股份有限公司陡河发电厂 | The defeated grey stored program controlled of boiler dry ash handling system |
| CN110104439A (en) * | 2019-06-04 | 2019-08-09 | 魏志晓 | A kind of powder negative pressure feeder |
| CN111410042A (en) * | 2020-05-07 | 2020-07-14 | 西安华电清洁能源技术有限公司 | Anti-blocking energy-saving system and method suitable for powder conveying system |
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|---|---|
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