CN107717744B - Metal dust management and control system, control method and safety production management and control system suitable for metal polishing operation environment - Google Patents
Metal dust management and control system, control method and safety production management and control system suitable for metal polishing operation environment Download PDFInfo
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- CN107717744B CN107717744B CN201710866007.5A CN201710866007A CN107717744B CN 107717744 B CN107717744 B CN 107717744B CN 201710866007 A CN201710866007 A CN 201710866007A CN 107717744 B CN107717744 B CN 107717744B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
Abstract
The invention discloses a metal dust control system, a control method and a safe production control system suitable for a metal polishing operation environment, wherein the metal dust control system comprises a wet dust removal system and a metal dust control system, the wet dust removal system comprises an independent workshop, a PVC soft plastic door curtain, a water curtain device, an air curtain device, a high-power exhaust fan, a dust adsorption pool at the bottom of a working area and a dust filtering device at the rear part of the working area, and the metal dust control system comprises 3 detection sub-nodes and 1 execution main node; the wet dust removal adopts an independent working area type design, so that metal dust generated by polishing can be effectively prevented from escaping into the whole workshop, the dust removal area is more concentrated, and the dust removal effect is better; the execution main node can effectively judge and make timely response according to data transmitted by each sub-node, the mode enables the field arrangement difficulty to be greatly reduced, operability is reserved for subsequent increase of detection nodes, and the expansibility of the management and control system is increased.
Description
Technical Field
The invention belongs to the field of safety production, and particularly relates to a safety production management and control system suitable for metal polishing operation and wet dust removal environment.
Background
During the polishing process of metal products, a large amount of metal dust is generated, particularly the aluminum magnesium dust is common, and the dust can cause great influence on human health if directly sucked into the lung by operators. When the dust is accumulated to a certain concentration, the dust is mixed with air to form combustible mixed gas, the combustible mixed gas is easy to ignite when meeting open fire, the burnt dust is extremely easy to oxidize, and the generated heat can be rapidly transferred to the surrounding dust to cause a series of reactions so as to cause dust explosion.
In a plant for removing metal dust by a wet method, adsorption of metal dust generated by polishing by flowing water is an efficient and environmentally-friendly method, but the metal dust and water chemically react to generate a certain amount of hydrogen, which is an extremely flammable and explosive gas, and any tiny electric spark may cause explosion when a certain concentration is reached.
The existing monitoring system aiming at wet dust removal does not detect the hydrogen concentration and the water flow, does not have the safety processing action after alarming, and can not effectively guarantee the life safety of workers under the condition of human negligence only by alarming after any dangerous signal is detected.
Patent "explosion-proof wet process dust collector of aluminium magnesium dust" [ patent application no: 201520658282.4, publication No.: CN 204952535U ], discloses an explosion-proof wet dust removal device for aluminum magnesium dust, which uses an air pipe to control dust concentration and explosion-proof and fire-proof stars and is provided with a dust concentration detector and an alarm device, but the system cannot automatically take countermeasures after alarming, and lacks detection of hydrogen concentration, once the explosion-proof device fails, hydrogen can explode when meeting the fire stars after being gathered to a certain concentration.
Patent "dust monitoring system" [ patent application No.: 201620282793.7, publication No.: CN 205861502U ], discloses a dust monitoring system. According to the system, the background server, the grating sensor, the alarm device and the shooting device are in wireless remote signal transmission through an MQTT internet of things transmission protocol, although the system realizes networked wireless transmission and is provided with the corresponding alarm device, processing actions after alarming are not described, and further deterioration of field conditions is easily caused under the condition of human negligence.
Disclosure of Invention
In order to solve the problems in the background art, a safety production management and control system suitable for a metal polishing operation environment is provided, and the specific technical scheme is as follows:
the utility model provides a safety in production management and control system suitable for metal polishing operational environment, includes a wet dedusting system and a set of metal dust management and control system suitable for metal polishing operational environment, wherein:
the wet dedusting system comprises: an independent workshop, a PVC soft plastic door curtain, a water curtain device, an air curtain device, a high-power exhaust fan, a dust adsorption pool at the bottom of a working area, a dust filtering device at the rear part of the working area and a bottom water outlet; the metal dust management and control system includes: 3 detection child nodes and 1 execution master node.
The PVC soft plastic door curtain is positioned on the front surface of the outer wall of the workshop and used for allowing workers to enter and exit the working area and sealing the working area so as to prevent dust from escaping into the whole workshop; the water curtain device is used for continuously sending the water source subjected to the circulating filtration into the adsorption tank at the bottom of the working area, so that the metal dust can be immediately adsorbed by the water; the air curtain device sucks clean air into the working area from the outside and is matched with the exhaust fan above the rear part of the working area, so that an effective air flow is formed in the working area, and the metal dust generated by polishing continuously rushes to the adsorption pool at the bottom due to the air flow; the high-power exhaust fan is positioned above the rear part of the working area and used for adsorbing mixed gas of dust and air in the working area by the adsorption tank and filtering the mixed gas by the rear filtering device, discharging the mixed gas out of the working area and forming effective air flow together with the air curtain device; the bottom adsorption tank is used for storing water from the water curtain device and adsorbing metal dust generated by polishing; the water outlet is positioned on the right side of the bottom adsorption tank and is used for pumping the sewage after dust adsorption out of the adsorption tank for filtering and recycling; the dust filtering device at the rear part of the working area comprises two layers of baffles, a coarse filtering net and a fine filtering net and is used for removing extra dust which is not adsorbed by the bottom adsorption pool so that the air exhauster can exhaust clean air;
the 3 detection sub-nodes are respectively positioned on the outer wall of the left side of the working area, the outer wall of the right side of the working area and the outer wall of the air outlet, and the execution main node is positioned on the outer wall of the right side of the working area;
the detection sub-node is used for collecting dust concentration, hydrogen concentration, temperature and humidity of different positions in a working area and water flow in a water pipe, and wirelessly sending the information to the execution main node, and each detection sub-node comprises: the device comprises a control module, a detection module and a wireless module;
the main execution node is used for displaying information data sent by each detection sub-node in real time, judging the data in real time, and alarming and cutting off a power supply of the polishing machine once the concentration value number of dust or hydrogen exceeds a warning value or the flow value is lower than a minimum threshold value, and the main execution node comprises: the emergency stop system comprises a control module, a display module, a wireless module, an alarm module and an emergency stop module;
the control module is used for processing the data acquired by the detection module, controlling the wireless communication module to transmit and receive data, controlling the display module to display data and giving corresponding instruction signals to the alarm module and the forced stop module;
the detection module is used for collecting dust concentration, temperature, humidity, hydrogen concentration and water flow in the operation environment, and sending detected data to the control module for further processing;
the display module is used for displaying real-time dust concentration, temperature, humidity, hydrogen concentration and current water flow in the working environment so that an operator can conveniently and visually know the overall situation in the current working environment;
the alarm module is used for sending out alarm bell and light signals, and when the dust concentration and the hydrogen concentration exceed alarm values or the water flow is smaller than a minimum threshold value, the control module generates an alarm instruction;
the wireless communication module is used for performing wireless communication between each sub-node for acquiring sensor data and the execution main node;
the forced stopping module is used for forcibly stopping the polishing machine and emergently cutting off the power supply of the polishing machine, and when any detected data exceeds a warning value or is lower than a minimum threshold value, the control module enables the forced stopping module and the alarm module to act simultaneously so as to ensure the life safety of workers.
Compared with the prior art, the invention has the following beneficial effects:
(1) the wet dust removal adopts an independent working area type design, so that metal dust generated by polishing can be effectively prevented from escaping into the whole workshop, the dust removal area is more concentrated, and the dust removal effect is better;
(2) the detection sub-nodes arranged in the working environment transmit the data collected by the sensors to the execution main node in real time through the 2.4G wireless module, and the execution main node can effectively judge and make a timely response according to the data transmitted by the sub-nodes;
(3) the control system is additionally provided with the detection of water flow and the detection of hydrogen concentration, the main means of wet dust removal is that water is used for adsorbing metal dust generated by polishing, a polishing machine can be safely powered on after the dust removal equipment is opened, and the dust removal equipment can be opened only when the water flow is detected to be not less than a minimum threshold value; in the process of adsorbing metal dust by water, a certain amount of hydrogen is generated, and if the hydrogen is accumulated to a certain concentration, explosion can occur if sparks are encountered. Under the condition that other detection sensors are not reduced, the detection of the water flow and the hydrogen concentration undoubtedly enables the whole management and control system to get on a step again on the aspect of guaranteeing the life safety of workers, and the reliability of the management and control system is greatly improved.
(4) When the MCU of the execution main node judges that the dust concentration and the hydrogen concentration transmitted from the detection sub-node exceed the warning value or the water flow is lower than the minimum threshold value, the MCU of the execution main node automatically responds to trigger an alarm and a forced stop relay, the forced stop relay immediately cuts off the working power supply of the polishing machine, the emergency stop is realized, the life safety of workers can be effectively and reliably ensured under the condition of artificial negligence, and the function of a control system is further improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic block diagram of the management and control system of the present invention;
description of reference numerals: 1-left monitoring sub-node No. 1, 2-right monitoring sub-node No. 2, 3-air outlet No. 3, 4-exhaust fan, 5-air curtain device, 6-water curtain device, 7-water outlet, 8-bottom adsorption tank, 9, 11-worker standing operation area, 10-polishing machine placing area, 12-execution main node (screen display area); 13-dust filtering device at the back of the working area; 14-PVC soft plastic door curtain;
Detailed Description
The invention will be further described with reference to the accompanying drawings 1 and 2:
as shown in fig. 1, a general schematic diagram of a safety production management and control system suitable for a metal polishing operation environment provided by the present invention is composed of a wet dust removal system and a metal dust management and control system suitable for a metal polishing operation environment.
The wet dust removal system is an independent working area, and the front end of the outer wall of the working area adopts the PVC soft plastic door curtain 14, so that workers can conveniently enter and exit the working area and play a good role in sealing, and metal dust is effectively prevented from being diffused into a workshop; the water curtain device 6 feeds the sewage in the adsorption tank 8 into the adsorption tank 8 at the bottom of the working area in a waterfall mode after filtering the water through the water outlet 7; an air curtain device 5 above the front part of the working area sends air into the working area, so that metal dust generated by polishing moves to the bottom of the working area under the action of an air curtain and is finally adsorbed by water; the exhaust fan 4 pumps the mixed gas of air and metal dust in the working area out of the working area after passing through the rear filtering device 13, the fixed air flowing direction is formed in the sealed working area under the combined action of the exhaust fan 4 and the air curtain device 5, and the air curtain device 5 is more than the adsorption tank 8, more than the rear filtering device 13 and more than the exhaust fan 4; the rear dust filter 13 is used to further filter dust that is not adsorbed by water, thereby allowing the exhaust fan 4 to exhaust clean air; the sewage which is discharged from the water outlet 7 and adsorbed with the metal dust is filtered and then continuously recycled by the water curtain device 6.
The metal dust management and control system includes: the 3 detection child nodes and the 1 execution master node are schematic block diagrams of a management and control system as shown in fig. 2.
The 3 detection sub-nodes are respectively arranged on the left outer wall 1, the right outer wall 2 and the upper air outlet outer wall 3 of the working area, so that the omnibearing detection effect is achieved;
the execution main node is arranged on the right outer wall 12 of the working area and is positioned below the right detection point, so that workers can clearly and visually observe all information on the site conveniently;
each of the detecting sub-nodes includes: the device comprises a control module, a detection module and a wireless module;
the execution master node includes: the emergency stop system comprises a control module, a display module, a wireless module, an alarm module and an emergency stop module;
the control module of the detection sub-node is used for storing the data collected by the detection module and sending corresponding instructions to the wireless module to send the data to the execution main node through the wireless module;
the detection modules of the detection sub-nodes collect data collected by the sensors, wherein the data comprise a dust concentration sensor, a hydrogen concentration sensor, a temperature sensor and a humidity sensor, and the data are transmitted to the control modules of the detection nodes;
the wireless module of the detection sub-node is used for wirelessly transmitting the data required by the control module to the wireless module of the execution main node;
the control module of the execution main node is used for controlling the wireless module of the main node to receive data transmitted by the detection sub-node, displaying the obtained data on the display module, comparing the dust concentration value and the concentration value with a corresponding warning value, comparing the water flow value with a minimum threshold value, and immediately triggering the alarm module and the forced stop module if the water flow value is abnormal;
the display module of the execution main node is used for displaying the data required to be displayed by the control module;
the wireless module of the execution main node is used for receiving data sent by the wireless module of each detection sub-node;
the alarm module of the execution main node is used for receiving the instruction of the control module, lightening an alarm lamp and sounding an alarm caller;
the forced stop module of the execution main node is used for receiving the instruction of the control module and cutting off the working power supply of the polishing machine;
the control module in this example is STC 51;
in the example, the detection module is a PM2.5 and PM10 concentration detection sensor, a temperature sensor, a humidity sensor, a hydrogen concentration detection sensor and a water flow detection sensor;
the wireless module in this example is a 2.4G wireless communication module NRF24L 01;
the display module in this example is an LCD display screen;
in the embodiment, the alarm module is an alarm relay and an alarm lamp with an alarm calling function;
the forced stop module in the embodiment is a forced stop relay and an alternating current contactor.
Step 1, a control module of a child node acquires data of a dust concentration sensor in a detection module;
step 2, a control module of the child node collects data of a temperature and humidity sensor in a detection module;
step 3, the control module of the child node collects data of the water flow sensor in the detection module;
step 4, the control module of the child node collects data of a hydrogen concentration sensor in the detection module;
step 5, the control module of the child node sends an instruction to the wireless module and sends the acquired data to the execution main node through the wireless module according to a specific data packet;
step 6, the wireless module of the execution main node receives the data sent by the wireless module of the sub-node, analyzes the data packet and then transmits the data packet to the control module of the execution main node;
step 7, the control module of the main node classifies the data and compares the data within a period of continuous time;
step 8, the main node control module compares the water flow, if the obtained water flow is less than the minimum threshold value within the continuous 15 seconds, the step 12 is executed, if the obtained water flow is not less than the minimum threshold value within the continuous 15 seconds, the previous comparison result is cleared, the comparison is executed again from the next time, and the step 9 is executed;
step 9, the control module of the master node compares the concentration of PM2.5, if the data obtained in the continuous 1 minute is greater than the alarm value, step 12 is executed, if the data obtained in any one time in the continuous 1 minute is not greater than the alarm value, the previous comparison result is cleared, the comparison is executed again from the next time, and step 10 is executed;
step 10, the main node control module compares the concentration of the PM10, if the data obtained in the continuous 1 minute is greater than the alarm value, the step 12 is executed, if the data obtained in any one time in the continuous 1 minute is not greater than the alarm value, the previous comparison result is cleared, the comparison is executed again from the next time, and the step 11 is executed;
step 11, the main node control module compares the concentration of hydrogen, if the obtained data in the continuous 1 minute is greater than the alarm value, the step 12 is executed, if the data in any one time in the continuous 1 minute is not greater than the alarm value, the previous comparison result is cleared, the comparison is executed again from the next time, and the step 7 is executed;
and step 12, the control module of the execution main node sends an instruction to the alarm module and the forced stop module, so that the alarm module generates sound-light alarm and the forced stop module cuts off the working power supply of the polishing machine, thereby ensuring the safety of the field production environment.
The invention can avoid many artificial operation errors so as to ensure the life safety of operators, when the abnormity is detected, the whole system can automatically process, the use of relative manpower is reduced, and the automation degree of the whole system is higher. In the long run, the system has high practicability and higher application prospect and use value.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. A control method of a safety production management and control system suitable for a metal polishing operation environment is characterized in that,
the safety production control system comprises a metal dust control system and a wet dust removal system;
the metal dust management and control system comprises 3 detection sub-nodes and 1 execution main node;
the 3 detection sub-nodes are respectively arranged on the left outer wall (1), the right outer wall (2) and the upper air outlet outer wall (3) of the working area, so that the omnibearing detection effect is achieved;
the execution main node is arranged on the right outer wall (12) of the working area and is positioned below the right detection point, so that workers can clearly and intuitively observe all information on the site conveniently;
each detection child node includes: the device comprises a control module, a detection module and a wireless module;
the execution main node comprises a control module, a display module, a wireless module, an alarm module and a forced stop module;
the control module of the detection sub-node is used for storing the data collected by the detection module and sending corresponding instructions to the wireless module to send the data to the execution main node through the wireless module; the detection modules of the detection sub-nodes collect data collected by the sensors, wherein the data comprise a dust concentration sensor, a hydrogen concentration sensor, a temperature sensor and a humidity sensor, and the data are transmitted to the control modules of the detection nodes; the wireless module of the detection sub-node is used for wirelessly transmitting the data required by the control module to the wireless module of the execution main node;
the control module of the execution main node is used for controlling the wireless module of the main node to receive data transmitted by the detection sub-node, displaying the obtained data on the display module, comparing the dust concentration value and the hydrogen concentration value with corresponding warning values, comparing the water flow value with a minimum threshold value, and immediately triggering the alarm module and the forced stop module if abnormity occurs; the display module of the execution main node is used for displaying the data required to be displayed by the control module; the wireless module of the execution main node is used for receiving data sent by the wireless module of each detection sub-node; the alarm module of the execution main node is used for receiving the instruction of the control module, lightening an alarm lamp and sounding an alarm caller; the forced stop module of the execution main node is used for receiving the instruction of the control module and cutting off the working power supply of the polishing machine; the forced stopping module is a forced stopping relay and an alternating current contactor;
the wet dedusting system comprises: an independent workshop, a PVC soft plastic door curtain, a water curtain device, an air curtain device, a high-power exhaust fan, a dust adsorption pool at the bottom of a working area, a dust filtering device at the rear part of the working area and a bottom water outlet;
the PVC soft plastic door curtain is positioned on the front surface of the outer wall of the workshop and used for allowing workers to enter and exit the working area and sealing the working area so as to prevent dust from escaping into the whole workshop; the water curtain device is used for continuously sending the water source subjected to the circulating filtration into the adsorption tank at the bottom of the working area, so that the metal dust can be immediately adsorbed by the water; the air curtain device sucks clean air into the working area from the outside and is matched with the exhaust fan above the rear part of the working area, so that an effective air flow is formed in the working area, and the metal dust generated by polishing continuously rushes to the adsorption pool at the bottom due to the air flow; the high-power exhaust fan is positioned above the rear part of the working area and used for adsorbing mixed gas of dust and air in the working area by the adsorption tank and filtering the mixed gas by the rear filtering device, discharging the mixed gas out of the working area and forming effective air flow together with the air curtain device; the bottom dust adsorption tank is used for storing water from the water curtain device and adsorbing metal dust generated by polishing; the bottom water outlet is positioned on the right side of the bottom adsorption tank and is used for pumping the sewage after dust adsorption out of the adsorption tank for filtering and recycling; the dust filtering device at the rear part of the working area comprises two layers of baffles, a coarse filtering net and a fine filtering net and is used for removing extra dust which is not adsorbed by the bottom adsorption pool so that the air exhauster can exhaust clean air;
the control method comprises the following steps:
step 1, a control module of a child node acquires data of a dust concentration sensor in a detection module;
step 2, a control module of the child node collects data of a temperature and humidity sensor in a detection module;
step 3, the control module of the child node collects data of the water flow sensor in the detection module;
step 4, the control module of the child node collects data of a hydrogen concentration sensor in the detection module;
step 5, the control module of the child node sends an instruction to the wireless module and sends the acquired data to the execution main node through the wireless module according to a specific data packet;
step 6, the wireless module of the execution main node receives the data sent by the wireless module of the sub-node, analyzes the data packet and then transmits the data packet to the control module of the execution main node;
step 7, the control module of the main node classifies the data and compares the data within a period of continuous time;
step 8, the main node control module compares the water flow, if the obtained water flow is less than the minimum threshold value within the continuous 15 seconds, the step 12 is executed, if the obtained water flow is not less than the minimum threshold value within the continuous 15 seconds, the previous comparison result is cleared, the comparison is executed again from the next time, and the step 9 is executed;
step 9, the control module of the master node compares the concentration of PM2.5, if the data obtained in the continuous 1 minute is greater than the alarm value, step 12 is executed, if the data obtained in any one time in the continuous 1 minute is not greater than the alarm value, the previous comparison result is cleared, the comparison is executed again from the next time, and step 10 is executed;
step 10, the main node control module compares the concentration of the PM10, if the data obtained in the continuous 1 minute is greater than the alarm value, the step 12 is executed, if the data obtained in any one time in the continuous 1 minute is not greater than the alarm value, the previous comparison result is cleared, the comparison is executed again from the next time, and the step 11 is executed;
step 11, the main node control module compares the concentration of hydrogen, if the obtained data in the continuous 1 minute is greater than the alarm value, the step 12 is executed, if the data in any one time in the continuous 1 minute is not greater than the alarm value, the previous comparison result is cleared, the comparison is executed again from the next time, and the step 7 is executed;
and step 12, the control module of the execution main node sends an instruction to the alarm module and the forced stop module, so that the alarm module generates sound-light alarm and the forced stop module cuts off the working power supply of the polishing machine, thereby ensuring the safety of the field production environment.
2. The method as claimed in claim 1, wherein the control module of the metal dust management and control system is STC 51.
3. The method as claimed in claim 1, wherein the detecting module of the metal dust management and control system is a PM2.5, PM10 concentration detecting sensor, a temperature sensor, a humidity sensor, a hydrogen concentration detecting sensor, or a water flow detecting sensor.
4. The method as claimed in claim 1, wherein the wireless module of the metal dust control system is a 2.4G wireless communication module NRF24L 01.
5. The method as claimed in claim 1, wherein the display module of the metal dust management and control system is an LCD display.
6. The method as claimed in claim 1, wherein the alarm module of the metal dust management and control system is an alarm relay or an alarm lamp with an alarm calling function.
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| CN108907730A (en) * | 2018-07-05 | 2018-11-30 | 泰州市申工不锈钢制品有限公司 | A kind of round-bar pass truncation grinding attachment |
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