CN107717744A - A kind of metallic dust managing and control system, control method and the safety in production managing and control system suitable for medal polish operating environment - Google Patents
A kind of metallic dust managing and control system, control method and the safety in production managing and control system suitable for medal polish operating environment Download PDFInfo
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- CN107717744A CN107717744A CN201710866007.5A CN201710866007A CN107717744A CN 107717744 A CN107717744 A CN 107717744A CN 201710866007 A CN201710866007 A CN 201710866007A CN 107717744 A CN107717744 A CN 107717744A
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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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention discloses a kind of metallic dust managing and control system, control method and the safety in production managing and control system suitable for medal polish operating environment, including wet method dedusting system and metallic dust managing and control system, the wet method dedusting system includes an independent workplace, PVC flexible plastics door curtain, drenching installation, air curtain apparatus, high-power air exhauster, workspace bottom adsorbing powder dust pond, workspace rear portion dust filtering device, and metallic dust managing and control system includes 3 detection child nodes, 1 execution host node；Wet dedusting uses the design of autonomous working area formula, can effectively avoid polishing caused by metallic dust escape into whole workshop, so that the region of dedusting is more concentrated, and the effect of dedusting is more preferable；Execution host node can carry out data according to the transmission of each child node and effectively be judged and made timely to respond, and which substantially reduces site layout project difficulty, also reserved operability for follow-up increase detection node, added the expansion of managing and control system.
Description
Technical field
The invention belongs to the field of keeping the safety in production, and in particular to a kind of suitable for medal polish operation, wet dedusting environment
Safety in production managing and control system.
Background technology
During hard goods are polished processing technology, substantial amounts of metallic dust can be produced, magnalium dust is particularly normal
See, if this dust is directly sucked in lung by operator, tremendous influence can be caused to health.When these dust accumulate
When gathering finite concentration and air mixing can form flammable mixed gas, run into naked light and be easy to catch fire, the dust after burning
Easily aoxidize, its caused heat can pass to the dust of surrounding rapidly, cause series reaction so as to cause dust explosion.
Using wet method remove metallic dust factory in, with the water of flowing come adsorb polishing caused by metallic dust be one
The efficient and again environmentally friendly mode of kind, but metallic dust and water can produce chemical reaction and produce a certain amount of hydrogen, this is one
The extremely inflammable and explosive gas of kind, when reaching finite concentration, any small electric spark is likely to set off an explosion.
The all not detections to density of hydrogen and water flow of the existing monitoring system for wet dedusting, do not possess report yet
Alert later safe handling action, after any danger signal is detected, only alarm can not have in the case of human negligence
Effect ensures the life security of worker.
Patent " magnalium dust explosion protection Wet-way dust-collector " [number of patent application：201520658282.4 publication number：CN
204952535 U], a kind of explosion-proof Wet-way dust-collector of magnalium dust is disclosed, although the device controls dust dense with airduct
Degree and anti-explosion fire star simultaneously be furnished with dust concentration detector and warning device, but system will not make reply automatically and arrange after alarm
Apply, also lack the detection to density of hydrogen, once explosion-protection equipment failure, hydrogen meets Mars after finite concentration is gathered will
Explode.
Patent " dust control system " [number of patent application：201620282793.7 publication number：The U of CN 205861502],
Disclose a kind of dust control system.The system passes through background server and grating inductor, warning device, filming apparatus
MQTT Internet of Things host-host protocols realize wireless remote signal transmission, although the system realize networking be wirelessly transferred and
There is provided corresponding warning device, but act without processing of the explanation after alarm, in the case where there is human negligence, hold
Easily cause the further deterioration of field condition.
The content of the invention
To solve the problems, such as in above-mentioned background technology, there is provided a kind of safety in production suitable for medal polish operating environment
Managing and control system, concrete technical scheme are as follows：
A kind of safety in production managing and control system suitable for medal polish operating environment, including a kind of medal polish that is applied to are made
The wet method dedusting system of industry environment and a set of metallic dust managing and control system, wherein：
The wet method dedusting system includes：One independent workplace, PVC flexible plastics door curtain, drenching installation, air curtain dress
Put, high-power air exhauster, workspace bottom adsorbing powder dust pond, workspace rear portion dust filtering device, bottom delivery port；The gold
Category dust managing and control system includes：3 detection child nodes and 1 execution host node.
The PVC flexible plastics door curtain is located at the front of workplace outer wall, and workspace and seal operation are passed in and out for worker
Area, prevent dust from escaping into whole workshop；The drenching installation is used to the water source source after circulating filtration being continuously fed to work
Make the adsorption tank of area bottom so that metallic dust can be adsorbed with water immediately；The air curtain apparatus inhales clean air from outside
Enter workspace, and the air exhauster of cooperating area rear upper so that an effectively air flow is formed in workspace, this
Air flow makes metallic dust caused by polishing constantly pour into the adsorption tank of bottom；The high-power air exhauster is located at workspace
The top at rear portion, for the mixed gas of dust in workspace and air to be adsorbed and rear portion filter by adsorption tank
After filtering, workspace is discharged, and air curtain apparatus forms an effective air flow together；The bottom adsorption tank is used to deposit
The water that gets off from drenching installation simultaneously adsorbs metallic dust caused by polishing；The delivery port is located at the right side of bottom adsorption tank, uses
Sewage after by adsorption of dust extracts adsorption tank out and carries out filtering Posterior circle use；The workspace rear portion dust filtering device bag
Two layers of baffle plate, coarse filtration net and thin screen pack are included, for the extra dust for being removed without being adsorbed by bottom adsorption tank, makes air exhauster
Clean air can be discharged；
3 detections child node is located at outer wall, workspace outer right wall and air outlet outer wall on the left of workspace respectively,
Perform host node and be located at workspace outer right wall；
The detection child node is used for dust concentration, density of hydrogen, humiture and the water of diverse location in collecting work area
Water flow in pipe, and these information are wirelessly sent to execution host node, each child node that detects includes：Control mould
Block, detection module, wireless module；
The execution host node each detects the information data that child node is sent for real-time display, and these data are entered
Row real-time judge, once finding that dust or density of hydrogen value number are less than minimum threshold beyond warning value or flow value, report at once
Alert and cut-out polishing electromechanical source, performing host node includes：Control module, display module, wireless module, alarm module, compel to stop mould
Block；
The control module be used for processing detection module collect data, control wireless communication module carry out transmitting-receiving number
According to, control display module display data and to alarm module and compel to stop the corresponding command signal of module；
The detection module is used for Collecting operation environment dust concentration, temperature, humidity, density of hydrogen, water flow, will examine
The data of survey are sent into control module and wait further processing；
The display module is used to showing real-time dust concentration in operating environment, temperature, humidity, density of hydrogen, current
Water flow, so that operating personnel easily and intuitively understand the overall condition in current work environment；
The alarm module is used to send alarm the tinkle of bells and light signal, when dust concentration, density of hydrogen exceed warning value
Or water flow is less than minimum threshold, control module can be all set to produce alarm command；
The wireless communication module is used to carry out nothing between the child node of each collection sensing data and execution host node
Line communicates；
It is described to compel to stop module for compeling to stop polishing machine, the power supply of emergency cut-off polishing machine, when the data of any detection exceed
Warning value or during less than minimum threshold, control module can make to compel to stop module and alarm module while action is to protect the life of worker
Safety.
Compared with prior art, the present invention has the advantages that：
(1) wet dedusting uses the design of autonomous working area formula, can effectively avoid polishing caused metallic dust escape
Into whole workshop, so that the region of dedusting is more concentrated, and the effect of dedusting is more preferable；
(2) data that the sensor is collected into are passed through the wireless moulds of 2.4G by the detection child node being arranged in operating environment
Block is transferred to execution host node in real time, and execution host node can carry out data according to the transmission of each child node and effectively be judged simultaneously
Make and timely responding, which substantially reduces site layout project difficulty, has also been reserved for follow-up increase detection node operable
Property, add the expansion of managing and control system；
(3) detection to water flow and the detection of density of hydrogen, the primary hand of wet dedusting are added in managing and control system
Section is to adsorb metallic dust caused by polishing with water, and polishing machine must be electric in ability safety after cleaner opening,
When only detecting that water flow is not less than minimum threshold, it could illustrate that cleaner has already turned on；In water adsorbing metal dust
During, a certain amount of hydrogen can be produced, if Mars is met with when accumulating to finite concentration to explode.In remaining detection
In the case of sensor is nondecreasing, the detection of water flow and density of hydrogen undoubtedly allows whole managing and control system ensureing worker's life
Stepped a stage again in safety, considerably increase the reliability of managing and control system.
(4) while warning function is remained, add again and the urgent of polishing machine is stopped operating, when execution host node
MCU determines the dust concentration for detecting child node and transmitting, density of hydrogen is less than minimum threshold beyond warning value or water flow
When, it can automatically respond, triggering alarm and compel to stop relay, compel to stop relay that the working power of polishing machine can be cut off immediately,
Emergency shutdown, can effectively and reliably ensure the life security of worker in the case of human negligence, further perfect management and control
The function of system.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is managing and control system theory diagram of the present invention；
Description of reference numerals：No. 1 monitoring child node on the left of 1-, the monitoring child nodes of 2- right sides 2, No. 3 detections of 3- air outlets
Child node, 4- air exhausters, 5- air curtain apparatus, 6- drenching installations, 7- delivery ports, 8- bottoms adsorption tank, 9,11- worker's standing operation
Area, 10- polishing machines rest area, 12- perform host node (screen display area)；13- workspaces rear portion dust filtering device；14-PVC
Flexible plastic door curtain；
Embodiment
Below in conjunction with the accompanying drawings 1, Fig. 2, the present invention is further illustrated：
As shown in figure 1, it is a kind of safety in production managing and control system suitable for medal polish operating environment proposed by the present invention
General illustration, be made up of the wet method dedusting system suitable for medal polish operating environment and metallic dust managing and control system.
The wet method dedusting system is an independent workspace, and workspace outer wall front end employs PVC flexible plastic door curtains
14, worker can be facilitated to play good sealing effectiveness while passing in and out workspace, effectively prevent metallic dust to be diffused into workshop
In；Water of the sewage in adsorption tank 8 after delivery port 7 filters is sent into workspace bottom by drenching installation 6 by way of " waterfall "
The adsorption tank 8 in portion；Air is sent into workspace by the air curtain apparatus 5 of workspace front upper so that metal powder caused by polishing
Dirt moves in the presence of air curtain to the bottom of workspace, is finally adsorbed with water；Air exhauster 4 is by the air and metal in workspace
The mixed gas of dust extracts workspace out after rear portion filter 13, and the collective effect of air exhauster 4 and air curtain apparatus 5 causes
Fixed air-flow direction is formd in the workspace of sealing, air curtain apparatus 5 --->Adsorption tank 8 --->Rear portion filter
13——>Air exhauster 4；The dust filtering device 13 at rear portion is used to further filter the dust not being adsorbed with water, so that taking out
Blower fan 4 discharges clean air；The sewage that delivery port 7 is discharged after having adsorbed metallic dust continues the proscenia that feeds water after being filtered
6 recycle.
Metallic dust managing and control system includes：3 detection child nodes, 1 execution host node, as shown in Fig. 2 being managing and control system
Theory diagram.
3 detection child nodes are separately mounted to left side outer wall 1, outer right wall 2 and the top air outlet outer wall of workspace
3, to reach comprehensive Detection results；
The outer right wall 12 for performing host node and being arranged on workspace, positioned at the lower section of right side test point, facilitates worker
All information at scene are observed clear and intuitively；
Each detection child node includes：Control module, detection module, wireless module；
The execution host node includes：Control module, display module, wireless module, alarm module, compel to stop module；
The control module of the detection child node is used for the data for depositing detection module collection, and is sent to wireless module
Instruct accordingly and data are sent to execution host node by wireless module；
The data of each sensor collection of detection module collection of the detection child node, including sensor of dust concentration,
Hydrogen gas concentration sensor, temperature sensor, humidity sensor, and by control module of these data transfers to detection node；
The wireless module of the detection child node is used to the data of control module requirement being wirelessly sent to execution host node
Wireless module；
The control module for performing host node is used to control the wireless module of host node to receive what detection child node transmitted
Data, and obtained data are included on display module, while by dust concentration value and ask its concentration value and corresponding warning
Value is made comparisons, and water flow value is made comparisons with minimum threshold, if there is exception, is triggered alarm module immediately and is compeled to stop module；
The display module for performing host node is used for the data that display control module requires display；
The wireless module for performing host node is used to receive the data that the wireless module of each detection child node is sent；
The alarm module for performing host node is used for the instruction of receive and control module, lights alarm lamp and sounds alarm
Calling set；
The urgent instruction for stopping module and being used for receive and control module for performing host node, cut off the working power of polishing machine；
Control module is STC51 in this example；
Detection module is PM2.5, PM10 concentration detection sensor, temperature sensor, humidity sensor, hydrogen in this example
Concentration detection sensor, water flow detection sensor；
Wireless module is 2.4G wireless communication modules NRF24L01 in this example；
Display module is LCD display in this example；
Alarm module is alarm relay, the alarm lamp with alarm calls function in this example；
Compel to stop module in this example to compel to stop relay, A.C. contactor.
Step 1, in the control module acquisition testing module of child node sensor of dust concentration data；
Step 2, in the control module acquisition testing module of child node Temperature Humidity Sensor data；
Step 3, the data of the control module acquisition testing module reclaimed water flow rate sensor of child node；
Step 4, in the control module acquisition testing module of child node hydrogen gas concentration sensor data；
Step 5, the control module of child node sends instructions to wireless module by the data collected according to specific data
Bag is sent to execution host node by wireless module；
Step 6, the wireless module for performing host node receives the data that the wireless module of child node is sent, by packet solution
Send the control module for performing host node after analysis to；
Step 7, data are classified and carry out the comparison in one section of continuous time by the control module of host node；
Step 8, host node control module compares water flow, if the water flow obtained by continuous 15 seconds is both less than
Minimum threshold, then step 12 is performed, if there are any data not once to be less than minimum threshold in continuous 15 seconds, by before
Comparative result reset, again from being compared and perform step 9 next time；
Step 9, the control module of host node compares PM2.5 concentration, if the data obtained by continuous 1 minute are all
More than warning value, then step 12 is performed, if there are any data to be once not greater than warning value in continuous 1 minute, by it
Preceding comparative result is reset, again from being compared and perform step 10 next time；
Step 10, host node control module compares PM10 concentration, if the data obtained by continuous 1 minute are all big
In warning value, then step 12 is performed, if there are any data to be once not greater than warning value in continuous 1 minute, by before
Comparative result reset, again from being compared and perform step 11 next time；
Step 11, host node control module compares the concentration of hydrogen, if the data obtained by continuous 1 minute are all big
In warning value, then step 12 is performed, if there are any data to be once not greater than warning value in continuous 1 minute, by before
Comparative result reset, again from being compared and perform step 7 next time；
Step 12, the control module for performing host node sends instructions to alarm module and compels to stop module, produces alarm module
With the working power for compeling to stop module cut-out polishing machine while raw sound and light alarm, it is ensured that the safety of in-situ production environment.
The present invention can avoid it is many it is artificial on operational error so that it is guaranteed that the life security of operator, when detecting
Have abnormal when occurring, whole system can automatically process, and reduce the use of relative manpower, whole system automaticity is more
It is high.In the long run, the practicality of the system is high, has higher application prospect and use value.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example describe
Structure, material or feature are contained at least one embodiment or example of the present invention.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can combine in an appropriate manner in any one or more embodiments or example.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (9)
1. a kind of metallic dust managing and control system, it is characterised in that including 3 detection child nodes, 1 execution host node；
3 detection child nodes are separately mounted to left side outer wall (1), outer right wall (2) and the top air outlet outer wall of workspace
(3), to reach comprehensive Detection results；
The outer right wall (12) for performing host node and being arranged on workspace, positioned at the lower section of right side test point, facilitates worker clear
The clear all information for being visually observed that scene；
Each detection child node includes：Control module, detection module, wireless module；
The execution host node includes control module, display module, wireless module, alarm module, compels to stop module；
The control module of the detection child node is used for the data for depositing detection module collection, and is sent accordingly to wireless module
Instruction data are sent to execution host node by wireless module；The detection module of the detection child node collects each sensing
The data of device collection, including sensor of dust concentration, hydrogen gas concentration sensor, temperature sensor, humidity sensor, and by these
Control module of the data transfer to detection node；The wireless module of the detection child node is used for the data of control module requirement
It is wirelessly sent to the wireless module for performing host node；
The control module for performing host node is used to control the wireless module of host node to receive the data that detection child node transmits,
And include obtained data on display module, while by dust concentration value and ask its concentration value to make ratio with corresponding warning value
Compared with water flow value is made comparisons with minimum threshold, if occurring abnormal, alarm module is triggered immediately and compels to stop module；It is described to hold
The display module of row host node is used for the data that display control module requires display；The wireless module for performing host node is used for
Receive the data that the wireless module of each detection child node is sent；The alarm module for performing host node is used to receive control mould
The instruction of block, light alarm lamp and sound acoustic alarm；It is described perform host node it is urgent stop module be used for receive control mould
The instruction of block, cut off the working power of polishing machine.
A kind of 2. metallic dust managing and control system according to claim 1, it is characterised in that control module STC51.
3. a kind of metallic dust managing and control system according to claim 1, it is characterised in that detection module PM2.5, PM10
Concentration detection sensor, temperature sensor, humidity sensor, density of hydrogen detection sensor, water flow detection sensor.
4. a kind of metallic dust managing and control system according to claim 1, it is characterised in that wireless module is 2.4G channel radios
Believe module NRF24L01.
5. a kind of metallic dust managing and control system according to claim 1, it is characterised in that display module is LCD display.
6. a kind of metallic dust managing and control system according to claim 1, it is characterised in that alarm module is alarm relay
Device, the alarm lamp with alarm calls function.
7. a kind of metallic dust managing and control system according to claim 1, it is characterised in that compel to stop module to compel to stop relay
Device, A.C. contactor.
8. a kind of control method of metallic dust managing and control system, it is characterised in that comprise the following steps：
Step 1, in the control module acquisition testing module of child node sensor of dust concentration data；
Step 2, in the control module acquisition testing module of child node Temperature Humidity Sensor data；
Step 3, the data of the control module acquisition testing module reclaimed water flow rate sensor of child node；
Step 4, in the control module acquisition testing module of child node hydrogen gas concentration sensor data；
Step 5, the control module of child node sends instructions to wireless module and leads to the data collected according to specific packet
Cross wireless module and be sent to execution host node；
Step 6, the wireless module for performing host node receives the data that the wireless module of child node is sent, after resolve packet
Send the control module for performing host node to；
Step 7, data are classified and carry out the comparison in one section of continuous time by the control module of host node；
Step 8, host node control module compares water flow, if the water flow obtained by continuous 15 seconds is both less than minimum
Threshold value, then step 12 is performed, if there are any data not once to be less than minimum threshold in continuous 15 seconds, by ratio before
Relatively result is reset, again from being compared and perform step 9 next time；
Step 9, the control module of host node compares PM2.5 concentration, if the data obtained by continuous 1 minute are all greater than
Warning value, then step 12 is performed, if there are any data to be once not greater than warning value in continuous 1 minute, by before
Comparative result is reset, again from being compared and perform step 10 next time；
Step 10, host node control module compares PM10 concentration, if the data obtained by continuous 1 minute are all greater than warning
Ring value, then step 12 is performed, if there are any data to be once not greater than warning value in continuous 1 minute, by ratio before
Relatively result is reset, again from being compared and perform step 11 next time；
Step 11, host node control module compares the concentration of hydrogen, if the data obtained by continuous 1 minute are all greater than warning
Ring value, then step 12 is performed, if there are any data to be once not greater than warning value in continuous 1 minute, by ratio before
Relatively result is reset, again from being compared and perform step 7 next time；
Step 12, the control module for performing host node sends instructions to alarm module and compels to stop module, makes alarm module generation sound
With the working power for compeling to stop module cut-out polishing machine while light alarm, it is ensured that the safety of in-situ production environment.
9. a kind of safety in production managing and control system suitable for medal polish operating environment, it is characterised in that be applied to including one kind
The wet method dedusting system of medal polish operating environment and a kind of metallic dust managing and control system as claimed in claim 1, wherein：
The wet method dedusting system includes：It is one independent workplace, PVC flexible plastics door curtain, drenching installation, air curtain apparatus, big
Power air exhauster, workspace bottom adsorbing powder dust pond, workspace rear portion dust filtering device, bottom delivery port；
The PVC flexible plastics door curtain is located at the front of workplace outer wall, passes in and out workspace and sealing work area for worker, prevents
Only dust is escaped into whole workshop；The drenching installation is used to the water source source after circulating filtration being continuously fed to workspace bottom
The adsorption tank in portion so that metallic dust can be adsorbed with water immediately；Clean air is sucked work by the air curtain apparatus from outside
Area, and the air exhauster of cooperating area rear upper so that an effectively air flow, this air stream are formed in workspace
The dynamic adsorption tank for making metallic dust caused by polishing constantly pour into bottom；The high-power air exhauster is located at workspace rear portion
Top, for the mixed gas of dust in workspace and air to be passed through into adsorption tank absorption and the filtering of rear portion filter
Afterwards, workspace is discharged, and air curtain apparatus forms an effective air flow together；The bottom adsorbing powder dust pond is used to deposit
The water that gets off from drenching installation simultaneously adsorbs metallic dust caused by polishing；The bottom delivery port is located at the right side of bottom adsorption tank
Side, carry out filtering Posterior circle use for extracting the sewage after adsorption of dust out adsorption tank；Workspace rear portion dust-filtering
Device includes two layers of baffle plate, coarse filtration net and thin screen pack, for the extra dust for being removed without being adsorbed by bottom adsorption tank, makes
Exhausting function discharges clean air.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710866007.5A CN107717744B (en) | 2017-09-22 | 2017-09-22 | Metal dust management and control system, control method and safety production management and control system suitable for metal polishing operation environment |
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| CN201710866007.5A CN107717744B (en) | 2017-09-22 | 2017-09-22 | Metal dust management and control system, control method and safety production management and control system suitable for metal polishing operation environment |
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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 |
| JP2020203335A (en) * | 2019-06-17 | 2020-12-24 | Dmg森精機株式会社 | Machine tool |
| CN117282194A (en) * | 2023-10-17 | 2023-12-26 | 米脂冀东水泥有限公司 | Dust treatment device for magnesium slag cement |
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