CN105376997A - Positive-pressure explosion-proof control cabinet and control method thereof - Google Patents
Positive-pressure explosion-proof control cabinet and control method thereof Download PDFInfo
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- CN105376997A CN105376997A CN201510796124.XA CN201510796124A CN105376997A CN 105376997 A CN105376997 A CN 105376997A CN 201510796124 A CN201510796124 A CN 201510796124A CN 105376997 A CN105376997 A CN 105376997A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000002159 abnormal effect Effects 0.000 claims abstract description 32
- 238000001816 cooling Methods 0.000 claims description 31
- 238000010926 purge Methods 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 231100001261 hazardous Toxicity 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 238000004134 energy conservation Methods 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 11
- 238000004880 explosion Methods 0.000 description 6
- 230000005855 radiation Effects 0.000 description 6
- 238000005273 aeration Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
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Abstract
The invention provides a positive pressure explosion-proof control cabinet. Malleation explosion-proof switch board includes air feed module, pressure release module, control module, unusual alarm module and power switching module, the air feed module with the cooperation of pressure release module is in order to maintain the malleation of malleation explosion-proof switch board malleation intracavity, control module respectively with the air feed module pressure release module unusual alarm module reaches power switching module electricity is connected, unusual alarm module is used for reporting to the abnormal operation of malleation explosion-proof switch board, power switching module is used for controlling the user electrical system's of malleation explosion-proof switch board malleation intracavity power. The invention further provides a control method of the positive pressure explosion-proof control cabinet. The positive pressure explosion-proof control cabinet and the control method thereof provided by the invention not only have stable air supply and high safety, but also can effectively solve the problem of heat dissipation of the positive pressure explosion-proof control cabinet, thereby achieving the effects of energy conservation and environmental protection and improving the reliability and stability of the operation of the positive pressure explosion-proof control cabinet.
Description
Technical field
The present invention relates to explosion proof control case field, concrete, relate to a kind of positive-pressure explosion-proof control cubicle and control method thereof.
Background technology
Along with development and the production-scale expanding day of China's industry, as the scene in dangerous industries such as oil, chemical industry, metallurgy, oil field, coal and plastic sprayings, positive voltage type anti-explosion rack is used to have a district of explosion risk gas or steam more and more widely (when normally running, the place of explosive gas atmosphere may be there is) (when normally running, the place of explosive gas atmosphere can not be there is in He Erqu; If there is be also occur once in a while and be only the short time exist place) hazardous area, particularly to the various electric control system be in explosion risk region and automatic control system rack.Because the existence of malleation in rack can overcome the harmful effect of severe environmental conditions to device and instrument etc. in cabinet well, thus make whole system have explosion-proof, dust-proof, moistureproof and corrosion-resistant performance, drastically increase the environmental suitability of rack.
At present, existing positive-pressure explosion-proof rack has ventilated type and compensation two kinds, and the two can solve the electrical explosion proof problem of rack.In actual use, ventilated type positive-pressure explosion-proof rack can be taken away the heat of pressurized enclosure internal heat generation components and parts or high-power heat generating components, thus effectively solve the problem of cooling machine cabinet, greatly improve each device in cabinet, the working life of instrument and reliability, but its air consumption is compensation tens times of even hundred times.And for compensation positive-pressure explosion-proof rack, the requirement of its working method itself determines shell and must have hermetically-sealed construction more better than ventilated type positive-pressure explosion-proof rack, thus the radiating condition of rack is worsened more, accelerate the aging of components and parts, particularly to there is the rack of heating element or high-power heat generating components and taking the rack of intensive mounting means, heat radiation to be the technical problem that must consider.Under normal circumstances, people can consider to adopt heat pipe heat radiation technology to solve the heat dissipation problem of rack, but greatly certainly will improve the cost of product due to the application of hot pipe technique, and this overall design philosophy is inadvisable economically.
Therefore, be necessary to develop further existing positive-pressure explosion-proof rack, to avoid above-mentioned defect.
Summary of the invention
The technical problem that simultaneously can not realize heat radiation and economical and energy saving is there is in order to solve above-mentioned existing positive-pressure explosion-proof rack, the invention provides a kind of positive-pressure explosion-proof control cubicle and control method thereof, not only air feed is stable, fail safe is high, and effectively can solve the problem of positive-pressure explosion-proof control cubicle heat radiation, thus reach the effect of energy-saving and environmental protection and improve positive-pressure explosion-proof control cubicle reliability of operation and stability.
The invention provides a kind of positive-pressure explosion-proof control cubicle, described positive-pressure explosion-proof control cubicle comprises air feed module, pressure release module, control module, abnormal alarm module and electrical source exchange module, described air feed module coordinates with the malleation maintained in positive-pressure explosion-proof control cubicle malleation chamber with described pressure release module, described control module respectively with described air feed module, described pressure release module, described abnormal alarm module and the electrical connection of described electrical source exchange module, described abnormal alarm module is used for reporting to the police to the misoperation of described positive-pressure explosion-proof control cubicle, described electrical source exchange module is for controlling the power supply of the user's electrical system in described positive-pressure explosion-proof control cubicle malleation chamber, wherein,
Described air feed module comprises source of the gas and prepares unit and supply unit, described source of the gas is prepared unit and is comprised successively by air compressor that pipeline connects, cooling driers, filter and air accumulator, described supply unit comprises switch valve, pressure-reducing valve, flow control valve, supply air line, allocation component and multiple injection apparatus, described switch valve, described pressure-reducing valve and described flow control valve order are located at described supply air line, the two ends of described supply air line are communicated with described allocation component with described air accumulator respectively, the other end of described allocation component is provided with multiple points of stream interfaces, a multiple described point stream interface is communicated with multiple described injection apparatus one_to_one corresponding.
In a preferred embodiment of described positive-pressure explosion-proof control cubicle provided by the invention, described pressure release module comprises exhaust outlet and pressure relief opening, and described exhaust outlet comprises the flame-proof switch valve being located at its inside, described pressure relief opening comprises the sparker and explosion-proof relief valve of being located at its inside.In a preferred embodiment of described positive-pressure explosion-proof control cubicle provided by the invention, described control module comprises detector and programmable logic controller (PLC), and described programmable logic controller (PLC) is electrically connected with described detector, described air feed module, described pressure release module, described abnormal alarm module and described electrical source exchange module respectively.
In a preferred embodiment of described positive-pressure explosion-proof control cubicle provided by the invention, described detector comprises the first pressure detector, second pressure detector, 3rd pressure detector, Temperature Detector and gas flow rate detector, and described first pressure detector is located in described air accumulator, described second pressure detector is located in the described supply air line between described pressure-reducing valve and described flow control valve, described 3rd pressure detector and described Temperature Detector are located in described positive-pressure explosion-proof control cubicle malleation chamber, described gas flow rate detector is located in the described supply air line of described flow control valve away from the side of described pressure-reducing valve.
In a preferred embodiment of described positive-pressure explosion-proof control cubicle provided by the invention, described abnormal alarm module comprises the abnormal alarm device be connected electrically.
The present invention also provides a kind of control method of described positive-pressure explosion-proof control cubicle, and it comprises the following steps:
Prepared by step one, source of the gas: provide air compressor, cooling driers, filter, air accumulator, the first pressure detector and programmable logic controller (PLC), the compressed air of described air compressor is stored in described air accumulator after the cooling process of described cooling driers and the filtration treatment of described filter, and described programmable logic controller (PLC) controls described air compressor according to the air pressure signal that described first pressure detector detects in described air accumulator and whether described cooling driers works;
Step 2, air feed in the malleation chamber of positive-pressure explosion-proof control cubicle: switch valve is provided, pressure-reducing valve, flow control valve, supply air line, allocation component, injection apparatus, exhaust outlet, pressure relief opening, second pressure detector, 3rd pressure detector, Temperature Detector and gas flow rate detector, described programmable logic controller (PLC) controls described air accumulator by the described switch valve of control and whether provides protective gas, described programmable logic controller (PLC) is according to described second pressure detector, described 3rd pressure detector, pressure-reducing valve described in the signal controlling of described Temperature Detector and described gas flow rate detector and described flow control valve, to regulate supply gas pressure and the air feed speed of described air accumulator, described air accumulator is by described supply air line, described allocation component and described injection apparatus are to the malleation interacvity air-filling of described positive-pressure explosion-proof control cubicle, described exhaust outlet and described pressure relief opening discharge the gas in the malleation chamber of described positive-pressure explosion-proof control cubicle,
Step 3, abnormal alarm: abnormal alarm device and electrical source exchange module are provided, when described positive-pressure explosion-proof control cubicle operation exception being detected, described programmable logic controller (PLC) abnormal alarm device according to the misoperation signal controlling detected carries out alarm, and cuts off the power supply of user's electrical system by controlling described electrical source exchange module.
In a preferred embodiment of the control method of described positive-pressure explosion-proof control cubicle provided by the invention, described step 2 comprises:
Purge mode time long, for being imported by protective gas large for flow in the malleation chamber of described positive-pressure explosion-proof control cubicle, to remove the hazardous gas of its inside;
Leakage compensation pattern, for described long time purge mode complete after to compensate with the protective gas of low discharge and reduce owing to revealing the described positive-pressure explosion-proof control cubicle malleation cavity pressure caused; And
Interval purge mode, for after described leakage compensation work pattern a period of time or/and under described leakage compensation pattern described positive-pressure explosion-proof control cubicle malleation cavity temperature raise or/and hypotony time, import in the malleation chamber of described positive-pressure explosion-proof control cubicle with the protective gas that flow is large;
Described long time after purge mode completes, described leakage compensation pattern and described interval purge mode alternate run.
Compared to prior art, described positive-pressure explosion-proof control cubicle provided by the invention and control method thereof have following beneficial effect:
One, the present invention controls the operation of described positive-pressure explosion-proof control cubicle by described control module, not only easy and simple to handle, and fail safe is high, is also convenient to the systematized management of described positive-pressure explosion-proof control cubicle, thus avoids the waste of human resources.
Two, the present invention controls described air compressor and described cooling driers by described programmable logic controller (PLC) according to the pressure information in the described air accumulator of described first pressure detector detection; and the compressed air of described air compressor is stored in described air accumulator as source of the gas after the cooling process of described cooling driers and the filtration treatment of described filter; clean protective gas can not only be provided for described positive-pressure explosion-proof control cubicle; and air feed is stablized, fail safe is high.
Three, described air accumulator of the present invention by described supply air line, described allocation component and described injection apparatus to described positive-pressure explosion-proof control cubicle air feed, and control the blowing pressure and described Flux Valve Control aeration speed by described pressure-reducing valve, effectively can not only solve the problem of described positive-pressure explosion-proof control cubicle heat radiation, and economical and energy saving.
Four, the present invention by arranging described sparker and described explosion-proof relief valve in described pressure relief opening, can not only avoid spark or the effusion of hot particle, and malleation in described positive-pressure explosion-proof control cubicle can be avoided too high.
Five, reported to the police by the misoperation of described abnormal alarm module to described positive-pressure explosion-proof control cubicle, achieve Timeliness coverage and the eliminating of fault.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the structural representation of positive-pressure explosion-proof control cubicle provided by the invention;
Fig. 2 is the flow chart of steps of the control method of positive-pressure explosion-proof control cubicle provided by the invention;
Fig. 3 is the flow chart of steps of step 2 in the control method of the control cubicle of positive-pressure explosion-proof shown in Fig. 2.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1, is the structural representation of positive-pressure explosion-proof control cubicle provided by the invention.Described positive-pressure explosion-proof control cubicle 1 comprises air feed module 11, pressure release module 13, control module 15, abnormal alarm module 17 and electrical source exchange module 19, described air feed module 11 coordinates with described pressure release module 13 to maintain the malleation in described positive-pressure explosion-proof control cubicle 1 malleation chamber, described control module 15 respectively with described air feed module 11, described pressure release module 13, described abnormal alarm module 17 and described electrical source exchange module 19 are electrically connected, described abnormal alarm module 17 is for reporting to the police to the misoperation of described positive-pressure explosion-proof control cubicle 1, described electrical source exchange module 19 is for controlling the user's electrical system power supply in described positive-pressure explosion-proof control cubicle 1 malleation chamber.
Described air feed module 11 comprises source of the gas and prepares unit 111 and supply unit 113, and described source of the gas prepares unit 111 for the preparation of pure air, and by described supply unit 113 to release guard gas in described positive-pressure explosion-proof control cubicle 1 malleation chamber.
Described source of the gas is prepared unit 111 and is comprised air compressor 1111, cooling driers 1113, filter 1115 and air accumulator 1117, described air compressor 1111, described cooling driers 1113, described filter 1115 and described air accumulator 1117 are connected by pipeline successively, and the compressed air of described air compressor 1111 is stored in described air accumulator 1117 after the cooling process of described cooling driers 1113 and the filtration treatment of described filter 1115.In the present embodiment, preferably, described source of the gas prepares unit 111 away from deathtrap.
Described supply unit 113 comprises switch valve 1131, pressure-reducing valve 1132, flow control valve 1133, supply air line 1134, allocation component 1135 and multiple injection apparatus 1136, described switch valve 1131, described pressure-reducing valve 1132 and described flow control valve 1133 order is located at described supply air line 1134, the two ends of described supply air line 1134 are communicated with described allocation component 1135 with described air accumulator 1117 respectively, the other end of described allocation component 1135 is provided with multiple points of stream interfaces, and a multiple described point stream interface is communicated with multiple described injection apparatus 1136 one_to_one corresponding.
Described switch valve 1131 closes on described air accumulator 1117 side and arranges, and for controlling described air accumulator 1117 whether air feed.
Described pressure-reducing valve 1132 is for controlling the blowing pressure.
Described flow control valve 1133 closes on described injection apparatus 1136 side and arranges, and for adjusting aeration speed.
Described injection apparatus 1136 comprises jet pipe and multiple nozzle, and described multiple nozzle is located at described jet pipe, and described jet pipe is communicated with a point stream interface one_to_one corresponding for described allocation component 1135.In the present embodiment, the arrangement of multiple described injection apparatus 1136 can adjust according to the installation situation of the user's electrical system in described positive-pressure explosion-proof control cubicle 1 malleation chamber.
Described pressure release module 13 comprises exhaust outlet 131 and pressure relief opening 133, and described exhaust outlet 131 and described pressure relief opening 133 are located at the shell of described positive-pressure explosion-proof control cubicle 1 respectively.
Described exhaust outlet 131 comprises the flame-proof switch valve 1311 being located at its inside.
Described pressure relief opening 133 comprises the sparker 1331 and explosion-proof relief valve 1333 of being located at its inside.
Described sparker 1331 is discharged from described explosion-proof relief valve 1333 with air-flow for the spark or hot particle preventing inside, described positive-pressure explosion-proof control cubicle 1 malleation chamber.
Described explosion-proof relief valve 1333 is not more than the highest preset value for keeping the malleation value of inside, described positive-pressure explosion-proof control cubicle 1 malleation chamber.
Described control module 15 comprises detector 151 and programmable logic controller (PLC) 153, and described detector 151 is electrically connected with described programmable logic controller (PLC) 153.In the present embodiment, described programmable logic controller (PLC) 153 can also be connected with host computer by network, thus realizes the networking control of described positive-pressure explosion-proof control cubicle 1.
Described detector 151 comprises the first pressure detector 1511, second pressure detector 1513, the 3rd pressure detector 1515, Temperature Detector 1517 and gas flow rate detector 1519.
Described first pressure detector 1511 is located in described air accumulator 1117.
Described second pressure detector 1513 is located in the described supply air line 1134 between described pressure-reducing valve 1132 and described flow control valve 1133.
Described 3rd pressure detector 1515 and described Temperature Detector 1517 are located in described positive-pressure explosion-proof control cubicle 1 malleation chamber, and are explosion detector.
Described gas flow rate detector 1519 is located in the described supply air line 1134 of described flow control valve 1133 away from the side of described pressure-reducing valve 1132.
Described programmable logic controller (PLC) 153 is also electrically connected with described air compressor 1111, described cooling driers 1113, described switch valve 1131, described pressure-reducing valve 1132, described flow control valve 1133 and described flame-proof switch valve 1311 respectively, and controls described air compressor 1111, described cooling driers 1113, described switch valve 1131, described pressure-reducing valve 1132, described flow control valve 1133 and described flame-proof switch valve 1311.
Described abnormal prompt module 17 comprises the abnormal alarm device 171 be connected electrically.In the present embodiment, preferably, described abnormal alarm device 171 is sound, light crossing-signal, and is located on the cabinet door of described positive-pressure explosion-proof control cubicle 1.
Referring again to Fig. 2, it is the flow chart of steps of the control method of positive-pressure explosion-proof control cubicle provided by the invention.The control method of described positive-pressure explosion-proof control cubicle comprises the following steps:
Step S1, prepared by source of the gas: provide air compressor 1111, cooling driers 1113, filter 1115, air accumulator 1117, first pressure detector 1511 and programmable logic controller (PLC) 153, the compressed air of described air compressor 1111 is stored in described air accumulator 1117 after the cooling process of described cooling driers 1113 and the filtration treatment of described filter 1115, described programmable logic controller (PLC) 153 controls described air compressor 1111 according to the air pressure signal that described first pressure detector 1511 detects in described air accumulator 1117 and whether described cooling driers 1113 works.
Concrete, the normal operation of described positive-pressure explosion-proof control cubicle 1 needs the gas pressure in described air accumulator 1115 to keep within the specific limits.When described first pressure detector 1511 detects described air accumulator 1117 internal gas pressure lower than default minimum, first signal is sent to described programmable logic controller (PLC) 153 by described first pressure detector 1511, described programmable logic controller (PLC) 153 controls described air compressor 1111 and described cooling driers 1113 works, and the compressed air of described air compressor 1111 is stored in described air accumulator 1117 after the cooling process of described cooling driers 1113 and the filtration treatment of described filter 1115; When described air accumulator 1117 internal gas pressure reaches default peak, secondary signal is sent to described programmable logic controller (PLC) 153 by described first pressure detector 1511, described programmable logic controller (PLC) 153 controls described air compressor 1111 and described cooling driers 1113 quits work, and described air accumulator 1117 stops inflation.
Step S2, air feed in the malleation chamber of positive-pressure explosion-proof control cubicle 1: switch valve 1131 is provided, pressure-reducing valve 1132, flow control valve 1133, supply air line 1134, allocation component 1135, injection apparatus 1136, exhaust outlet 131, pressure relief opening 133, second pressure detector 1513, 3rd pressure detector 1515, Temperature Detector 1517 and gas flow rate detector 1519, described programmable logic controller (PLC) 153 controls described air accumulator 1117 by the described switch valve 1131 of control and whether provides protective gas, and described programmable logic controller (PLC) 153 is according to described second pressure detector 1513, described 3rd pressure detector 1515, pressure-reducing valve 1132 and described flow control valve 1133 described in the signal controlling of described Temperature Detector 1517 and described gas flow rate detector 1519, thus regulating supply gas pressure and the air feed speed of described air accumulator 1117, described air accumulator 1117 is by described supply air line 1134, described allocation component 1135 and described injection apparatus 1136 are to the malleation interacvity air-filling of described positive-pressure explosion-proof control cubicle 1, and described exhaust outlet 131 and described pressure relief opening 133 discharge the gas in the malleation chamber of described positive-pressure explosion-proof control cubicle 1.
Referring again to Fig. 3, it is the flow chart of steps of step 2 in the control method of the control cubicle of positive-pressure explosion-proof shown in Fig. 2.Described step S2 specifically comprises the following steps:
S2-1, long time purge mode, import in the malleation chamber of described positive-pressure explosion-proof control cubicle 1 for the protective gas large with flow, to remove the hazardous gas of its inside;
Concrete, described long time purge mode under, described programmable logic controller (PLC) 153 controls described switch valve 1131 and opens, described flame-proof switch valve 1311 standard-sized sheet in described exhaust outlet 131, described pressure-reducing valve 1132 and described flow control valve 1133 are to purge mode operating state time long, described air accumulator 1117 starts to be filled with pure air in the malleation chamber of described positive-pressure explosion-proof control cubicle 1, the malleation chamber inside of described pure air to described positive-pressure explosion-proof control cubicle 1 purges, and by described exhaust outlet 131, hazardous gas inner a small amount of for described positive-pressure explosion-proof control cubicle 1 malleation chamber is discharged, after described air accumulator 1117 air feed to Preset Time, described programmable logic controller (PLC) 153 controls described flame-proof switch valve 1311 and cuts out, after malleation in the malleation chamber of described positive-pressure explosion-proof control cubicle 1 rises to 70Pa, described positive-pressure explosion-proof control cubicle 1 is allowed to obtain electric, when malleation in the malleation chamber of described positive-pressure explosion-proof control cubicle 1 rises to 150Pa, described long time purge mode quit work.In the present embodiment, described purge time can regulate according to actual conditions.
S2-2, leakage compensation pattern, for described long time purge mode complete after to compensate with the protective gas of low discharge and reduce owing to revealing the described positive-pressure explosion-proof control cubicle 1 malleation cavity pressure caused;
Concrete, under described leakage compensation pattern, described switch valve 1131 is opened, described flame-proof switch valve 1311 cuts out, described programmable logic controller (PLC) 153 controls described pressure-reducing valve 1132 and described flow control valve 1133 arrives leakage compensation mode state, described air accumulator 1117 reduces to the air demand in described positive-pressure explosion-proof control cubicle 1 malleation chamber, described programmable logic controller (PLC) 153 according to the detection Data Control of described 3rd pressure detector 1515 flow control valve 1133 thus the pressure maintained in described positive-pressure explosion-proof control cubicle 1 malleation chamber in normal range (NR), when the pressure that described 3rd pressure detector 1133 detects in described positive-pressure explosion-proof control cubicle 1 malleation chamber exceedes default warning value, described programmable logic controller (PLC) 153 controls described switch valve 1131 and cuts out, and the described relief valve 1333 now in described pressure relief opening 133 starts pressure release, when the pressure recover in described positive-pressure explosion-proof control cubicle 1 malleation chamber is to time normal, described leakage compensation pattern restarts.
S2-3, interval purge mode, for after described leakage compensation work pattern a period of time or/and under described leakage compensation pattern described positive-pressure explosion-proof control cubicle 1 malleation cavity temperature raise or/and hypotony time, import in the malleation chamber of described positive-pressure explosion-proof control cubicle 1 with the protective gas that flow is large;
Concrete, when described Temperature Detector 1517 detects that described positive-pressure explosion-proof control cubicle 1 malleation chamber internal temperature rises to default warning value or/and after described leakage compensation work pattern a period of time, described switch valve 1131 is opened, described programmable logic controller (PLC) 153 controls described pressure-reducing valve 1132 and described flow control valve 1133 to interval purge mode state to strengthen described air accumulator 1117 to the air demand in described positive-pressure explosion-proof control cubicle 1 malleation chamber, and regulate described flame-proof switch valve 1311 opening degree to discharge the gas in described positive-pressure explosion-proof control cubicle 1 malleation chamber, thus discharge the inflammable substance of release in described positive-pressure explosion-proof control cubicle 1 malleation chamber inside a small amount of hazardous gas that may exist or electric equipment, reduce the temperature of inside, described positive-pressure explosion-proof control cubicle 1 malleation chamber.
When described 3rd pressure detector 1133 detects that malleation value in described positive-pressure explosion-proof control cubicle 1 malleation chamber is lower than 70Pa, described switch valve 1131 is opened, the opening and closing of described flame-proof switch valve 1311, described programmable logic controller (PLC) 153 controls described pressure-reducing valve 1132 and described flow control valve 1133 to strengthen described air accumulator 1117 to the air demand in described positive-pressure explosion-proof control cubicle 1 malleation chamber to maintain malleation value.
Described long time after purge mode completes, described leakage compensation pattern and described interval purge mode alternate run;
Step S3, abnormal alarm: abnormal alarm device 171 and electrical source exchange module 19 are provided, when described positive-pressure explosion-proof control cubicle 1 operation exception being detected, described programmable logic controller (PLC) 153 abnormal alarm device 171 according to the misoperation signal controlling detected carries out alarm, and cuts off the power supply of user's electrical system by controlling described electrical source exchange module 19.In the present embodiment, abnormal information can also be sent to host computer by described programmable logic controller (PLC) 153, and described host computer notifies corresponding staff by message release mode.
Concrete, under described leakage compensation pattern, tonifying Qi is unsuccessful, when described detector 151 detects that malleation in described positive-pressure explosion-proof control cubicle 1 malleation chamber is lower than 70Pa, signal is sent to described programmable logic controller (PLC) 153, described programmable logic controller (PLC) 153 controls described abnormal alarm device 171 and carries out alarm, and cut off and the power supply of locked user's electrical system by controlling described electrical source exchange module 19, after user operation personnel eliminate fault, described electrical source exchange module can be untied, and rerun described step S1 and described step S2.
Described positive-pressure explosion-proof control cubicle provided by the invention and control method thereof have following beneficial effect:
One, the present invention controls the operation of described positive-pressure explosion-proof control cubicle 1 by described control module 15, not only easy and simple to handle, and fail safe is high, is also convenient to the systematized management of described positive-pressure explosion-proof control cubicle 1, thus avoids the waste of human resources.
Two, the present invention controls described air compressor 1111 and described cooling driers 1113 by described programmable logic controller (PLC) 153 according to the pressure information in the described air accumulator 1117 of described first pressure detector 1511 detection; and the compressed air of described air compressor 1111 is stored in described air accumulator 1117 as source of the gas after the cooling process of described cooling driers 1113 and the filtration treatment of described filter 1115; clean protective gas can not only be provided for described positive-pressure explosion-proof control cubicle 1; and air feed is stablized, fail safe is high.
Three, described air accumulator 1117 of the present invention by described supply air line 1134, described allocation component 1135 and described injection apparatus 1136 to described positive-pressure explosion-proof control cubicle 1 air feed, and control the blowing pressure by described pressure-reducing valve 1132 and described flow control valve 1133 controls aeration speed, effectively can not only solve the problem of described positive-pressure explosion-proof control cubicle 1 heat radiation, and economical and energy saving.
Four, the present invention by arranging described sparker 1131 and described explosion-proof relief valve 1133 in described pressure relief opening 133, can not only avoid spark or the effusion of hot particle, and malleation in described positive-pressure explosion-proof control cubicle 1 can be avoided too high.
Five, reported to the police by the misoperation of described abnormal alarm module 17 to described positive-pressure explosion-proof control cubicle 1, achieve Timeliness coverage and the eliminating of fault.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a positive-pressure explosion-proof control cubicle, it is characterized in that, comprise air feed module, pressure release module, control module, abnormal alarm module and electrical source exchange module, described air feed module coordinates with the malleation maintained in positive-pressure explosion-proof control cubicle malleation chamber with described pressure release module, described control module respectively with described air feed module, described pressure release module, described abnormal alarm module and the electrical connection of described electrical source exchange module, described abnormal alarm module is used for reporting to the police to the misoperation of described positive-pressure explosion-proof control cubicle, described electrical source exchange module is for controlling the power supply of the user's electrical system in described positive-pressure explosion-proof control cubicle malleation chamber, wherein,
Described air feed module comprises source of the gas and prepares unit and supply unit, described source of the gas is prepared unit and is comprised successively by air compressor that pipeline connects, cooling driers, filter and air accumulator, described supply unit comprises switch valve, pressure-reducing valve, flow control valve, supply air line, allocation component and multiple injection apparatus, described switch valve, described pressure-reducing valve and described flow control valve order are located at described supply air line, the two ends of described supply air line are communicated with described allocation component with described air accumulator respectively, the other end of described allocation component is provided with multiple points of stream interfaces, a multiple described point stream interface is communicated with multiple described injection apparatus one_to_one corresponding.
2. positive-pressure explosion-proof control cubicle according to claim 1, it is characterized in that, described pressure release module comprises exhaust outlet and pressure relief opening, and described exhaust outlet comprises the flame-proof switch valve being located at its inside, and described pressure relief opening comprises the sparker and explosion-proof relief valve of being located at its inside.
3. positive-pressure explosion-proof control cubicle according to claim 1, it is characterized in that, described control module comprises detector and programmable logic controller (PLC), and described programmable logic controller (PLC) is electrically connected with described detector, described air feed module, described pressure release module, described abnormal alarm module and described electrical source exchange module respectively.
4. positive-pressure explosion-proof control cubicle according to claim 3, it is characterized in that, described detector comprises the first pressure detector, second pressure detector, 3rd pressure detector, Temperature Detector and gas flow rate detector, and described first pressure detector is located in described air accumulator, described second pressure detector is located in the described supply air line between described pressure-reducing valve and described flow control valve, described 3rd pressure detector and described Temperature Detector are located in described positive-pressure explosion-proof control cubicle malleation chamber, described gas flow rate detector is located in the described supply air line of described flow control valve away from the side of described pressure-reducing valve.
5. positive-pressure explosion-proof control cubicle according to claim 1, is characterized in that, described abnormal alarm module comprises the abnormal alarm device be connected electrically.
6., as a control method for positive-pressure explosion-proof control cubicle as described in arbitrary in claim 1-5, it is characterized in that, comprise the following steps:
Prepared by step one, source of the gas: provide air compressor, cooling driers, filter, air accumulator, the first pressure detector and programmable logic controller (PLC), the compressed air of described air compressor is stored in described air accumulator after the cooling process of described cooling driers and the filtration treatment of described filter, and described programmable logic controller (PLC) controls described air compressor according to the air pressure signal that described first pressure detector detects in described air accumulator and whether described cooling driers works;
Step 2, air feed in the malleation chamber of positive-pressure explosion-proof control cubicle: switch valve is provided, pressure-reducing valve, flow control valve, supply air line, allocation component, injection apparatus, exhaust outlet, pressure relief opening, second pressure detector, 3rd pressure detector, Temperature Detector and gas flow rate detector, described programmable logic controller (PLC) controls described air accumulator by the described switch valve of control and whether provides protective gas, described programmable logic controller (PLC) is according to described second pressure detector, described 3rd pressure detector, pressure-reducing valve described in the signal controlling of described Temperature Detector and described gas flow rate detector and described flow control valve, to regulate supply gas pressure and the air feed speed of described air accumulator, described air accumulator is by described supply air line, described allocation component and described injection apparatus are to the malleation interacvity air-filling of described positive-pressure explosion-proof control cubicle, described exhaust outlet and described pressure relief opening discharge the gas in the malleation chamber of described positive-pressure explosion-proof control cubicle,
Step 3, abnormal alarm: abnormal alarm device and electrical source exchange module are provided, when described positive-pressure explosion-proof control cubicle operation exception being detected, described programmable logic controller (PLC) abnormal alarm device according to the misoperation signal controlling detected carries out alarm, and cuts off the power supply of user's electrical system by controlling described electrical source exchange module.
7. the control method of positive-pressure explosion-proof control cubicle according to claim 6, it is characterized in that, described step 2 comprises:
Purge mode time long, for being imported by protective gas large for flow in the malleation chamber of described positive-pressure explosion-proof control cubicle, to remove the hazardous gas of its inside;
Leakage compensation pattern, for described long time purge mode complete after to compensate with the protective gas of low discharge and reduce owing to revealing the described positive-pressure explosion-proof control cubicle malleation cavity pressure caused; And
Interval purge mode, for after described leakage compensation work pattern a period of time or/and under described leakage compensation pattern described positive-pressure explosion-proof control cubicle malleation cavity temperature raise or/and hypotony time, import in the malleation chamber of described positive-pressure explosion-proof control cubicle with the protective gas that flow is large;
Described long time after purge mode completes, described leakage compensation pattern and described interval purge mode alternate run.
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| CN107229250A (en) * | 2017-07-14 | 2017-10-03 | 希美埃（芜湖）机器人技术有限公司 | A kind of malleation robot explosion protection system and its control method |
| CN107509369A (en) * | 2017-09-12 | 2017-12-22 | 长春北方化工灌装设备股份有限公司 | Explosion-proof malleation cabinet and active cooling method based on Active Cooling |
| CN109277242A (en) * | 2018-08-17 | 2019-01-29 | 深圳市泰达机器人有限公司 | A kind of positive-pressure explosion-proof spray trigger |
| CN110032162A (en) * | 2018-04-18 | 2019-07-19 | 沈阳铝镁设计研究院有限公司 | A kind of DCS/PLC control cabinet and its application method with positive pressure |
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| CN112984379A (en) * | 2021-02-05 | 2021-06-18 | 亿昇(天津)科技有限公司 | Control method based on leakage compensation type positive pressure redundancy safety protection system |
| CN113359891A (en) * | 2021-06-23 | 2021-09-07 | 库卡机器人制造（上海）有限公司 | Positive pressure explosion-proof system and control method and device thereof, spraying device and storage medium |
| CN113910266A (en) * | 2021-12-16 | 2022-01-11 | 佛山华数机器人有限公司 | A explosion-proof switch board of malleation for spraying robot |
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| CN107229250A (en) * | 2017-07-14 | 2017-10-03 | 希美埃（芜湖）机器人技术有限公司 | A kind of malleation robot explosion protection system and its control method |
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| CN110032162A (en) * | 2018-04-18 | 2019-07-19 | 沈阳铝镁设计研究院有限公司 | A kind of DCS/PLC control cabinet and its application method with positive pressure |
| CN110471324A (en) * | 2018-05-10 | 2019-11-19 | 常州美择新材料科技有限公司 | A kind of experimental formula real time data acquisition smart machine based on technology of Internet of things |
| CN109277242A (en) * | 2018-08-17 | 2019-01-29 | 深圳市泰达机器人有限公司 | A kind of positive-pressure explosion-proof spray trigger |
| CN111642118A (en) * | 2020-07-02 | 2020-09-08 | 浙江全世科技有限公司 | Positive-pressure explosion-proof control cabinet and control method thereof |
| CN112984379A (en) * | 2021-02-05 | 2021-06-18 | 亿昇(天津)科技有限公司 | Control method based on leakage compensation type positive pressure redundancy safety protection system |
| CN113359891A (en) * | 2021-06-23 | 2021-09-07 | 库卡机器人制造（上海）有限公司 | Positive pressure explosion-proof system and control method and device thereof, spraying device and storage medium |
| CN113910266A (en) * | 2021-12-16 | 2022-01-11 | 佛山华数机器人有限公司 | A explosion-proof switch board of malleation for spraying robot |
| CN117072475A (en) * | 2023-10-16 | 2023-11-17 | 亿昇(天津)科技有限公司 | Integrated compressor control system |
| CN117072475B (en) * | 2023-10-16 | 2024-01-05 | 亿昇(天津)科技有限公司 | Integrated compressor control system |
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Address after: 473499 No. 61, Xingda East Road, Tanghe County, Nanyang City, Henan Province Patentee after: Nanyang Zhongtong Intelligent Technology Group Co.,Ltd. Address before: 473024 Li He Xiang Fu Niu Nan Lu, Wancheng District, Nanyang City, Henan Province Patentee before: NANYANG ZHONGTONG EXPLOSION-PROOF MOTOR ELECTRIC APPLIANCE Co.,Ltd. |
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Denomination of invention: Control method of positive pressure explosion-proof control cabinet Granted publication date: 20181214 Pledgee: China Minsheng Bank Co.,Ltd. Nanyang Branch Pledgor: Nanyang Zhongtong Intelligent Technology Group Co.,Ltd. Registration number: Y2024980021004 |