CN203338028U - Ammonia leakage protection device - Google Patents

Ammonia leakage protection device Download PDF

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CN203338028U
CN203338028U CN2013203655345U CN201320365534U CN203338028U CN 203338028 U CN203338028 U CN 203338028U CN 2013203655345 U CN2013203655345 U CN 2013203655345U CN 201320365534 U CN201320365534 U CN 201320365534U CN 203338028 U CN203338028 U CN 203338028U
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ammonia
value
module
unit
data acquisition
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吕忠华
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LAIYANG HENGRUN FOODSTUFF CO Ltd
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LAIYANG HENGRUN FOODSTUFF CO Ltd
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Abstract

The utility model relates to an ammonia leakage protection device. The ammonia leakage protection device comprises the first ammonia detection unit, the second ammonia detection unit, a data acquisition control unit, a refrigeration motion unit, a single refrigeration motion unit, a communication unit and an emergency illumination unit, wherein the first ammonia detection unit is arranged in a refrigeration machine room, the second ammonia detection unit is arranged in a single refrigeration area, two ammonia monitoring units are internally provided with ammonia detectors, the data acquisition control unit comprises a data acquisition module, a comparison module, a storage module and a logic control module, the refrigeration motion unit comprises the first exhaust blower fan controller, the first spraying controller and the first valve controller. The ammonia leakage protection device can simultaneously detect ammonia concentration of the refrigeration machine room and of the single refrigeration area in a production workshop, after data acquisition and processing, each controller is started, and loss caused by ammonia leakage is avoided.

Description

A kind of ammonia leakage protective device
Technical field
The utility model relates to a kind of Leakage Gas protective device, relates in particular to a kind of ammonia leakage protective device that image data is carried out to redundancy determination.
Background technology
Along with developing rapidly of industry; the place that the mankind contact harmful gas gets more and more; cause thus the mankind's harm itself also increasing, each intoxication accident, people are regained consciousness recognize in developing industry in to protect mankind inherently safe importance.Therefore the ammonia leak detector becomes requisite safeguard in industrial safety production gradually.
In prior art, the pick-up unit of harmful gas and method have been existed and even be applied in production reality, as Chinese patent " gas leakage automatic detecting method ", patent publication No. CN100480662C, it discloses a kind of gas leakage automatic detecting method, comprise the following steps: (1) means the town gas webmaster with the reticulate texture of tree type, each domestic consumer is final node, the submeter of housing unit is domestic consumer's host node, the voltage regulating station of coal gas is the host node of housing unit submeter, and gas distribution plant is the cancellated root node of tree type, (2) domestic gas meter that can long-rangely read coal gas use amount data is installed on domestic consumer's node, described domestic gas meter is provided with valve-off, the flow detector that can read coal gas input quantity and gas flow is installed on all the other nodes, described flow detector is provided with valve-off, and described domestic gas meter and every flow amount detecting device all are communicated with the information center of gas distribution plant by telecommunication unit, (3) host node reads coal gas use amount and the coal gas instantaneous delivery of the next node that is under the jurisdiction of this node in the time of agreement, and read the coal gas input quantity of this host node, the coal gas input quantity of certain node and the gas flow summation that is under the jurisdiction of the next each node of this node are compared, if input quantity is greater than the gas flow summation, mean gas leakage on this node, (4) information center sends the instruction of valve-off to the node that gas leak occurs, and sends the gas leak alarm signal to maintenance department.Be provided with many pick-up units in this utility model, branch is more, but the detection that this detection method breaks down to coal gas judgement is inaccurate, easily causes erroneous judgement.
For above-mentioned defect, the utility model creator provides a kind of more perfect scheme.
Summary of the invention
The purpose of this utility model is to provide a kind of ammonia leakage protective device, to overcome above-mentioned technological deficiency.
For achieving the above object, the utility model provides a kind of ammonia leakage protective device, and it comprises one first
Ammonia detecting unit, one second ammonia detecting unit, a data acquisition control unit, a refrigeration motor unit, a single freezing motor unit, a communication unit and an emergency lighting unit, wherein,
Described the first ammonia detecting unit is arranged in a refrigerating plant room, and described the second ammonia detecting unit is arranged in a single freezing zone, in two ammonia monitoring means, is provided with even number
Figure 448556DEST_PATH_IMAGE002
individual ammonia detector, wherein every two ammonia detectors are arranged in adjoining zone;
Described data acquisition control unit number is two, its respectively in refrigerating plant room and the ammonia concentration data that gather in single freezing zone processed, and two data gather between control module and have and reply mutually the transmission instruction; It comprises a data acquisition module, a comparison module, a memory module and a Logic control module, described data acquisition module is gathered and is transferred to described comparison module by the current signal in above-mentioned each ammonia detector, comprise a grouped element in described data acquisition module, its electric current by two ammonia detectors arranging in above-mentioned adjacent area divides into groups to arrange, and the ammonia detection information in described refrigerating plant room and single freezing zone forms respectively
Figure 989259DEST_PATH_IMAGE004
organize two-dimentional current matrix;
Described comparing unit is by above-mentioned
Figure 304834DEST_PATH_IMAGE004
every two groups that organize in two-dimentional current matrix are carried out the registration judgement, and result is transferred to described Logic control module, and it calculates first and second registration of two groups by following formula
Figure 843262DEST_PATH_IMAGE006
,
Figure 306605DEST_PATH_IMAGE008
In formula,
Figure 582822DEST_PATH_IMAGE010
the registration that means every two groups of electric currents,
Figure 80800DEST_PATH_IMAGE012
with
Figure 524550DEST_PATH_IMAGE014
the current value that means respectively described first group of two dimension current matrix, the sampled value that means the first ammonia detector,
Figure 560956DEST_PATH_IMAGE014
the sampled value that means the second ammonia detector;
Figure 851124DEST_PATH_IMAGE016
with
Figure 465776DEST_PATH_IMAGE018
the current value that means respectively described second group of two dimension current matrix,
Figure 841393DEST_PATH_IMAGE016
the sampled value that means the 3rd ammonia detector,
Figure 465273DEST_PATH_IMAGE018
the sampled value that means the 4th ammonia detector;
Figure 547629DEST_PATH_IMAGE020
mean the mean square deviation computing,
Figure 661079DEST_PATH_IMAGE022
mean integral operation;
Be provided with a registration threshold value in described memory module
Figure 523993DEST_PATH_IMAGE024
;
Described Logic control module is by the absolute value differences of registration in twos of described calculating gained and registration threshold value
Figure 748301DEST_PATH_IMAGE024
compare, if described registration absolute value differences is less than threshold value, conclude that wherein the smokescope of the position of two groups of ammonia detectors exceeds standard; By all calculating gained registrations respectively with the registration threshold value
Figure 13060DEST_PATH_IMAGE024
compare, can conclude that the smokescope of the position of detecting in a certain group of ammonia detector exceeds standard;
Described refrigeration motor unit comprises one first exhaust controller of fan, one first spray controller and one first valve positioner;
The freezing motor unit of described list comprises one second exhaust controller of fan, one second spray controller and a second valve door controller;
Described communication unit comprises a GPRS communication module, an alarm controller and an accident notice module.
Further, also be provided with a normal concentration value in described memory module with
Figure 319724DEST_PATH_IMAGE028
.
Further, described data acquisition module also comprises a coupling holding circuit, a filtering circuit, a gain amplifier circuit and a samples storage circuit, and above-mentioned each module connects in turn, wherein,
Described coupling holding circuit, it is in order to suppress electrical interference, and signal obtains the demand data waveform by filtering circuit after described coupling holding circuit, after described gain amplifier module is amplified, is reduced to original waveform; The current signal gathered transfers in described samples storage circuit and is stored after described grouped element is processed.
Further, described comparing unit calculates the registration of first group of two dimension current matrix and the 3rd group of two dimension current matrix according to the following equation
Figure 285406DEST_PATH_IMAGE030
,
Figure 466989DEST_PATH_IMAGE032
In formula,
Figure 797607DEST_PATH_IMAGE030
the registration that means every two groups of electric currents,
Figure 629254DEST_PATH_IMAGE012
with the current value that means respectively described first group of two dimension current matrix,
Figure 169137DEST_PATH_IMAGE012
the sampled value that means the first ammonia detector,
Figure 732973DEST_PATH_IMAGE014
the sampled value that means the second ammonia detector;
Figure 792196DEST_PATH_IMAGE034
with
Figure 161998DEST_PATH_IMAGE036
the current value that means respectively described the 3rd group of two dimension current matrix,
Figure 255856DEST_PATH_IMAGE034
the sampled value that means the 5th ammonia detector,
Figure 990593DEST_PATH_IMAGE036
the sampled value that means the 6th ammonia detector;
Figure 599429DEST_PATH_IMAGE020
mean the mean square deviation computing,
Figure 445025DEST_PATH_IMAGE022
mean integral operation.
Further, described comparing unit calculates the registration of second group of two dimension current matrix and the 3rd group of two dimension current matrix according to the following equation
Figure 393390DEST_PATH_IMAGE038
,
Figure 299029DEST_PATH_IMAGE040
In formula,
Figure 332844DEST_PATH_IMAGE038
the registration that means every two groups of electric currents,
Figure 982131DEST_PATH_IMAGE016
with the current value that means respectively described second group of two dimension current matrix, the sampled value that means the first ammonia detector,
Figure 444971DEST_PATH_IMAGE018
the sampled value that means the second ammonia detector;
Figure 960266DEST_PATH_IMAGE034
with
Figure 883222DEST_PATH_IMAGE036
the current value that means respectively described the 3rd group of two dimension current matrix,
Figure 192981DEST_PATH_IMAGE034
the sampled value that means the 5th ammonia detector,
Figure 935809DEST_PATH_IMAGE036
the sampled value that means the 6th ammonia detector;
Figure 926899DEST_PATH_IMAGE020
mean the mean square deviation computing,
Figure 766679DEST_PATH_IMAGE022
mean integral operation.
Further, when described data acquisition module is gathered current signal, to signal waveform, every continuous
Figure 202600DEST_PATH_IMAGE042
in the individual cycle, per cycle is selected
Figure 698303DEST_PATH_IMAGE044
the sampled point in the individual default moment, at interval of the time
Figure 289822DEST_PATH_IMAGE046
once sampling, serial sampling
Figure 187370DEST_PATH_IMAGE048
inferior; Within each cycle, select
Figure 776615DEST_PATH_IMAGE044
the time interval of individual sampled point
Figure 556352DEST_PATH_IMAGE050
calculate according to the following equation,
Figure 889244DEST_PATH_IMAGE052
In formula,
Figure 703617DEST_PATH_IMAGE054
the time interval that means sampled point, for correction factor, its size determines by sampled point quantity,
Figure 668479DEST_PATH_IMAGE058
the angular frequency that means signal, by the performance decision of ammonia detector,
Figure 805062DEST_PATH_IMAGE060
for initial phase angle,
Figure 473941DEST_PATH_IMAGE020
the time that means the signal period,
Figure 404987DEST_PATH_IMAGE062
the peak value that means signal waveform.
Further, described ammonia leakage protective device also comprises that an emergency lighting unit and promptly lets out the ammonia controller, and it all is arranged in described refrigerator room and single freezing zone.
Further, described data acquisition control unit device records the ammonia concentration value
Figure 97000DEST_PATH_IMAGE064
if,
Figure 99591DEST_PATH_IMAGE066
the concentration of this position surpasses first paragraph preset alarm value, described data acquisition control unit is to described refrigeration motor unit, single freezing motor unit, communication unit, emergency lighting unit and emergency governor sending controling instruction, alarm in it sends sound and light alarm immediately, described GPRS communication module is the mobile device transmission urgent signal to far-end by wireless telecommunications, described accident notice module sends accident information to the fire-fighting chamber, described emergency lighting unit starting emergency light, described air exhauster controller drives exhaust blower to open;
If ammonia concentration value
Figure 560659DEST_PATH_IMAGE068
, the concentration of this position surpasses second segment preset alarm value, and described data acquisition control unit drives the first valve positioner or second valve door controller are closed vent valve and inlet valve, described the first spray controller or the second spray controller opens spray system.
Further, described Logic control module is a MCU processor or a PLC, and it is integrated in a switch board.
Further, in described mono-frozen machine zone, an escape door also is set and automatically opens controller, it is connected with described data acquisition control unit, and controlled by it.
The beneficial effects of the utility model are compared with the prior art: the utility model ammonia leakage protective device is detected the ammonia concentration in the freezing zone of list of refrigerating plant room and workshop and after data acquisition process enough simultaneously, start various controllers, prevent that ammonia leakage from causing damage; Every two ammonia detectors are arranged in the refrigerating plant room and the adjacent domain in single freezing zone of workshop, described grouped element obtains two-dimentional current matrix according to two-dimensional matrix by the arrangement of dividing into groups of the image data of individual ammonia detector in above-mentioned refrigerating plant room and single freezing zone, calculated, be convenient to device and carry out software control, accuracy of judgement, quick.
Described zoom modules calculates the mode of registration in twos, can accurately judge the position of concentration over-standard, and judged result is easy to be shown, improves visual; The mode of redundancy determination in the utility model, can effectively judge the accurate location that ammonia concentration exceeds standard, and conveniently takes the measure of suing and labouring, and the cost of running software is lower, when detecting ammonia concentration, the quantity of ammonia detector can be set arbitrarily according to accuracy, be applicable to large-scale application; Avoid again the erroneous judgement of single ammonia concentration pick-up unit simultaneously.
In the utility model, when ammonia concentration exceeds standard, according to two threshold criteria, the ammonia concentration degree of exceeding standard is judged, be not very serious if exceed standard, taked the draft type exhaust; If concentration over-standard is more serious, start water-soluble mode and diluted, can effectively reduce ammonia concentration, guarantee personal security, loss can be dropped to again minimum.
The accompanying drawing explanation
The functional block diagram that Fig. 1 is the utility model ammonia leakage protective device;
The functional block diagram of the data acquisition control unit that Fig. 2 is the utility model ammonia leakage protective device;
The functional block diagram of the data acquisition module that Fig. 3 is the utility model ammonia leakage protective device.
Embodiment
Below in conjunction with accompanying drawing, detailed technology feature of the present utility model is further described, in order to more clearly understand the utility model.
Ammonia leakage protective device of the present utility model can be simultaneously detected and, after data acquisition process, is started various controllers the ammonia concentration in the freezing zone of list of refrigerating plant room and workshop, prevents that ammonia leakage from causing damage.
Refer to shown in Fig. 1, its functional block diagram that is the utility model ammonia leakage protective device, it comprises the first ammonia detecting unit 11 and the second ammonia detecting unit 12, wherein, described the first ammonia detecting unit 11 is arranged in described refrigerating plant room, and it comprises a plurality of ammonia detectors, in the present embodiment, it is 12 ammonia detectors, and wherein every two ammonia detectors are arranged in the adjacent domain of refrigerating plant room; Described the second ammonia detecting unit 12, it also comprises a plurality of ammonia detectors, in the present embodiment, it is also 12, in the adjacent domain in the freezing zone of list that wherein every two ammonia detectors are arranged on workshop.
Ammonia leakage protective device of the present utility model also comprises a data acquisition control unit 3, refrigeration motor unit 4, one a single freezing motor unit 5, a communication unit 6 and an emergency lighting unit 7; Above-mentioned each ammonia detector detects the ammonia concentration at its place, position and result is processed to described data acquisition control unit 3 by current delivery, and described data acquisition control unit 3 is controlled described refrigeration motor unit 4, single freezing motor unit 5 according to result.
Number in the unit of data acquisition control described in the utility model 3 is two, and it is respectively in refrigerating plant room and being processed by its concentration data of gathering in single freezing zone, and two data gather between control module and have and reply mutually the transmission instruction.
Described refrigeration motor unit 4 comprises one first exhaust controller of fan 41, one first spray controller 42 and one first valve positioner 43, and the freezing motor unit 5 of described list comprises one the 1 air exhauster controller 51, one second spray controller 52 and a second valve door controller 53.
Described communication unit 6 comprises a GPRS communication module 61, an alarm controller 62 and an accident notice module 63, and wherein, described GPRS communication module 61 is sent to the mobile device of far-end by wireless telecommunications, in order to inform managerial personnel; Described alarm controller 62 is separately positioned in described refrigerator room and single freezing zone, when regional concentration value exceeds standard at this, sends warning; Described accident notice module 63, it is in order to by described concentration over-standard communication to a fire protection control center.
Described ammonia leakage protective device also comprises that an emergency lighting unit 7 and promptly lets out ammonia controller 8, and it all is arranged in described refrigerator room and single freezing zone.
In described mono-frozen machine zone, an escape door also is set and automatically opens controller 9, it is connected with described data acquisition control unit 3, and controlled by it.
The utlity model has the adjustment controller of multiple ammonia concentration, can take different measures according to different ammonia concentrations.
Refer to shown in Fig. 2, the functional block diagram of its data acquisition control unit that is the utility model ammonia leakage protective device, in the utility model, described data acquisition control unit 3 comprises a data acquisition module 31, one comparison module 32, one memory module 33 and a Logic control module 34, wherein, described data acquisition module 31, its testing result to all ammonia detectors is carried out data sampling, and transfer in described comparison module 32, after described comparison module 32 is processed sample information according to pre-set programs, result is transferred to described Logic control module 34, described Logic control module 34 compares result and predetermined threshold value, and according to different threshold values to described refrigeration motor unit 4, the control that single freezing motor unit 5 carries out in various degree.
Refer to shown in Fig. 3, the functional block diagram of its data acquisition module that is the utility model ammonia leakage protective device, in the utility model, described data acquisition module comprises a coupling holding circuit 311, one filtering circuit 312, one gain amplifier circuit 313 1 grouped elements 315 and a samples storage circuit 314, above-mentioned each module connects in turn, wherein, described coupling holding circuit 311, it is in order to suppress electrical interference, signal obtains the demand data waveform by filtering circuit 312 after described coupling holding circuit 311, after described gain amplifier module 313 is amplified, be reduced to original waveform, the current signal gathered transfers in described samples storage circuit 314 and is stored after described grouped element 315 is processed.
In the utility model, when 31 pairs of current signals of described data acquisition module are gathered, take the mode of random sampling to carry out, to signal waveform, every continuous
Figure 662608DEST_PATH_IMAGE042
in the individual cycle, per cycle is selected
Figure 904233DEST_PATH_IMAGE044
the sampled point in the individual default moment, at interval of the time
Figure 382619DEST_PATH_IMAGE046
once sampling, serial sampling
Figure 698194DEST_PATH_IMAGE048
inferior; But, for referential and the accuracy that guarantees sampled data, within each cycle, select
Figure 106129DEST_PATH_IMAGE044
the time interval of individual sampled point
Figure 569472DEST_PATH_IMAGE050
calculate (1) according to the following equation,
Figure 851548DEST_PATH_IMAGE052
（1）
In formula,
Figure 21630DEST_PATH_IMAGE054
the time interval that means sampled point,
Figure 793277DEST_PATH_IMAGE056
for correction factor, its size determines by sampled point quantity,
Figure 681598DEST_PATH_IMAGE058
the angular frequency that means signal, by the performance decision of ammonia detector,
Figure 564104DEST_PATH_IMAGE060
for initial phase angle,
Figure 854271DEST_PATH_IMAGE020
the time that means the signal period,
Figure 734502DEST_PATH_IMAGE062
the peak value that means signal waveform.
Through above-mentioned formula (1) sampling, when signal amplitude is larger, sample more intensive, but the referential of sampled data is stronger; Sampling according to pre-conditioned sampling, makes follow-up signal deal with data amount reduce signal data, alleviates numerous and diverse computing that data are processed.
Described grouped element 315 divides into groups the image data of 6 ammonia detectors in above-mentioned refrigerating plant room and single freezing zone to arrange according to two-dimensional matrix, in the utility model, 6 ammonia detectors in described refrigerating plant room and single freezing zone, every two are arranged in adjoining zone respectively, two dimension values as a two dimension group electric current, in the present embodiment, 6 ammonia detectors in described refrigerating plant room and single freezing zone, according to label 1-12, be labeled as respectively 6 groups of two dimension set of currents, wherein first, two ammonia detectors are first group, the 3rd, four ammonia detectors are second group, the 5th, six ammonia detectors are the 3rd group, seven, eight ammonia detectors are the 4th group, nine, ten ammonia detectors are the 5th group, the 11,12 ammonia detectors are the 6th group, and described grouped element 315 arranges the current signal of collection to obtain matrix by three groups of two dimension current matrixs according to above-mentioned grouping
Figure 172437DEST_PATH_IMAGE070
,
Figure 796316DEST_PATH_IMAGE072
,
Figure 940989DEST_PATH_IMAGE074
,
Figure 54439DEST_PATH_IMAGE076
,
Figure 917353DEST_PATH_IMAGE078
,
Figure 141661DEST_PATH_IMAGE080
.
Being not limited to above-mentioned ammonia detector in the utility model is 12, and it can be any even number
Figure 344103DEST_PATH_IMAGE002
individual, described grouped element 315 is still divided into groups two current signals of every adjacent domain according to above-mentioned packet mode, is divided into
Figure 362875DEST_PATH_IMAGE004
individual two-dimentional current matrix.
Institute's grouped element divide into groups the image data of the even number ammonia detector in above-mentioned refrigerating plant room and single freezing zone to arrange according to two-dimensional matrix and obtains two-dimentional current matrix, is convenient to device and carries out software control, accuracy of judgement, quick.
The two-dimentional current matrix of respectively organizing that described data acquisition control unit 3 will gather carries out a redundancy determination, according to judged result, carries out corresponding control, is that the redundancy of redundance is judged in the present embodiment.
Comprise a comparer in comparison module described in the utility model 32, its current acquisition signal to all data acquisition module 314 interior storages carries out calculation process, calculates respectively a registration , and transmit it in described Logic control module, now with first group of two dimension current matrix and second group of two dimension current matrix, describe, described comparison module 32 (2) according to the following equation calculates the registration of electric current in these two groups two dimension current matrix signals
Figure 678766DEST_PATH_IMAGE006
,
（2）
In formula,
Figure 253284DEST_PATH_IMAGE010
the registration that means every two groups of electric currents,
Figure 887528DEST_PATH_IMAGE012
with
Figure 391322DEST_PATH_IMAGE014
the current value that means respectively described first group of two dimension current matrix, the sampled value that means the first ammonia detector,
Figure 188650DEST_PATH_IMAGE014
the sampled value that means the second ammonia detector;
Figure 310190DEST_PATH_IMAGE016
with
Figure 617675DEST_PATH_IMAGE018
the current value that means respectively described second group of two dimension current matrix,
Figure 773849DEST_PATH_IMAGE016
the sampled value that means the 3rd ammonia detector,
Figure 508587DEST_PATH_IMAGE018
the sampled value that means the 4th ammonia detector;
Figure 55106DEST_PATH_IMAGE020
mean the mean square deviation computing, mean integral operation.
In like manner first group of two dimension current matrix and the 3rd group two dimension current matrix according to the following equation (3) carry out registration calculating
Figure 911384DEST_PATH_IMAGE030
,
Figure 817023DEST_PATH_IMAGE032
（3）
In formula,
Figure 850838DEST_PATH_IMAGE030
the registration that means every two groups of electric currents,
Figure 500125DEST_PATH_IMAGE012
with
Figure 365313DEST_PATH_IMAGE014
the current value that means respectively described first group of two dimension current matrix,
Figure 441853DEST_PATH_IMAGE012
the sampled value that means the first ammonia detector,
Figure 962965DEST_PATH_IMAGE014
the sampled value that means the second ammonia detector;
Figure 478260DEST_PATH_IMAGE034
with
Figure 135637DEST_PATH_IMAGE036
the current value that means respectively described the 3rd group of two dimension current matrix,
Figure 445396DEST_PATH_IMAGE034
the sampled value that means the 5th ammonia detector,
Figure 453803DEST_PATH_IMAGE036
the sampled value that means the 6th ammonia detector; mean the mean square deviation computing,
Figure 284673DEST_PATH_IMAGE022
mean integral operation.
Second group of two dimension current matrix and the 3rd group two dimension current matrix (4) according to the following equation carries out registration calculating
Figure 703016DEST_PATH_IMAGE038
,
Figure 198719DEST_PATH_IMAGE040
（4）
In formula,
Figure 727921DEST_PATH_IMAGE038
the registration that means every two groups of electric currents,
Figure 422207DEST_PATH_IMAGE016
with
Figure 208854DEST_PATH_IMAGE018
the current value that means respectively described second group of two dimension current matrix,
Figure 926275DEST_PATH_IMAGE016
the sampled value that means the first ammonia detector, the sampled value that means the second ammonia detector;
Figure 11222DEST_PATH_IMAGE034
with the current value that means respectively described the 3rd group of two dimension current matrix,
Figure 38401DEST_PATH_IMAGE034
the sampled value that means the 5th ammonia detector, the sampled value that means the 6th ammonia detector;
Figure 781546DEST_PATH_IMAGE020
mean the mean square deviation computing,
Figure 774910DEST_PATH_IMAGE022
mean integral operation.
In like manner, by above-mentioned, respectively organize two-dimentional current matrix and carry out respectively registration calculating, draw 15 registration values.
Being not limited to above-mentioned ammonia detector in the utility model is 12, and it can be any even number individual, be divided into
Figure 203934DEST_PATH_IMAGE004
individual two-dimentional current matrix, carry out a registration calculating and get final product between every two groups of matrixes.The above-mentioned mode of calculating in twos registration, can accurately judge the position of concentration over-standard, and judged result is easy to be shown, improves visual.
Described comparison module 32 is done above-mentioned registration in twos difference and takes absolute value, and after calculating result, signal registration and absolute difference result of calculation is transferred in described Logic control module 34.
Described Logic control module 34 is a MCU processor or a PLC, and it is integrated in a switch board; Described memory module 34, be stored with a registration threshold value
Figure 665003DEST_PATH_IMAGE024
with a normal concentration value
Figure 32530DEST_PATH_IMAGE026
with
Figure 274156DEST_PATH_IMAGE028
, described Logic control module 34 is by the registration absolute value differences of described calculating gained and registration threshold value
Figure 486962DEST_PATH_IMAGE024
compare, if described registration absolute value differences is greater than threshold value, conclude that wherein the smokescope of the position of two groups of ammonia detectors exceeds standard; By all registration absolute value differences respectively with the registration threshold value
Figure 68116DEST_PATH_IMAGE024
compare, can conclude that the smokescope of the position of detecting in a certain group of ammonia detector exceeds standard.In the present embodiment, described registration threshold value
Figure 403283DEST_PATH_IMAGE024
value is 0.95.
The mode of redundancy determination in the utility model, can effectively judge the accurate location that ammonia concentration exceeds standard, and conveniently takes the measure of suing and labouring, and the cost of running software is lower, when detecting ammonia concentration, the quantity of ammonia detector can be set arbitrarily according to accuracy, be applicable to large-scale application; Avoid again the erroneous judgement of single ammonia concentration pick-up unit simultaneously.
Further, the ammonia of the position of the 3 pairs of concentration over-standards in described data acquisition control unit carries out the concentration detection, and corresponding ammonia detector is by the concentration value recorded , described and normal concentration value
Figure 148702DEST_PATH_IMAGE026
with
Figure 584362DEST_PATH_IMAGE028
contrasted, if
Figure 293692DEST_PATH_IMAGE066
, the concentration of this position surpasses first paragraph preset alarm value, now, described data acquisition control unit 3 is to described refrigeration motor unit 4, single freezing motor unit 5, communication unit 6, emergency lighting unit 7 and emergency governor 8 sending controling instructions, alarm 62 in it sends sound and light alarm immediately, reminding user takes safety measures, simultaneously, described GPRS communication module 61 is the mobile device transmission urgent signal to far-end by wireless telecommunications, described accident notice module 63 sends accident information to the fire-fighting chamber, described emergency lighting unit 7 starts emergency light, described air exhauster controller 41 drives exhaust blower to open, in order to reduce ammonia concentration.
If ammonia concentration value
Figure 244331DEST_PATH_IMAGE068
the concentration of this position surpasses second segment preset alarm value, the power supply that cuts off an accident compressor is controlled in described data acquisition control unit 3, drive the first valve positioner 43 or second valve door controller 53 to close vent valve and inlet valve, simultaneously described the first spray controller 42 or the second spray controller 52 are opened spray system; If leak in the larger uncontrollable situation of ammonia accident, start the described ammonia controller 8 of promptly letting out, promptly drain ammonia.
Also be provided with an escape door and automatically open controller 9 in described mono-frozen machine zone, it automatically opens escape door and provides convenience to staff's escape when ammonia leakage.
The mono-frozen machine zone belongs to intensive staff, and the current frozen food intensive staff of processing enterprise, so ammonia leakage can injure a lot of people.
Ammonia is in the circularly cooling process, if because production operation is improper or production equipment, pipeline, valve break down, will cause a large amount of ammonia evaporations, gas or liquid are to external leakage, therefore the serious consequences such as fire disaster, blast and personnel are poisoning likely occur, have the characteristics such as inflammable, explosive, poisonous when liquid ammonia is converted into gaseous ammonia, its destructiveness is very serious, directly the whole Production Regional of impact and surrounding enviroment.
In the utility model, when ammonia concentration exceeds standard, according to two threshold criteria, the ammonia concentration degree of exceeding standard is judged, be not very serious if exceed standard, taked the draft type exhaust; If concentration over-standard is more serious, start water-soluble mode and diluted, can effectively reduce ammonia concentration, guarantee personal security, loss can be dropped to again minimum.
Above for referencial use with preferred embodiment, technical characterictic of the present utility model and effect have been carried out to brief description, the utility model is not limited to above-mentioned embodiment, and in the scope that does not break away from the utility model aim, those skilled in the art can do various changes and modification.

Claims (8)

1. an ammonia leakage protective device, is characterized in that, it comprise one first ammonia detecting unit,
One second ammonia detecting unit, a data acquisition control unit, a refrigeration motor unit, a single freezing motor unit, a communication unit and an emergency lighting unit, wherein,
Described the first ammonia detecting unit is arranged in a refrigerating plant room, and described the second ammonia detecting unit is arranged in a single freezing zone, in two ammonia monitoring means, is provided with even number
Figure DEST_PATH_DEST_PATH_IMAGE002
individual ammonia detector, wherein every two ammonia detectors are arranged in adjoining zone;
Described data acquisition control unit number is two, its respectively in refrigerating plant room and the ammonia concentration data that gather in single freezing zone processed, and two data gather between control module and have and reply mutually the transmission instruction; It comprises a data acquisition module, a comparison module, a memory module and a Logic control module, described data acquisition module is gathered and is transferred to described comparison module by the current signal in above-mentioned each ammonia detector, comprise a grouped element in described data acquisition module, its electric current by two ammonia detectors arranging in above-mentioned adjacent area divides into groups to arrange, and the ammonia detection information in described refrigerating plant room and single freezing zone forms respectively
Figure DEST_PATH_DEST_PATH_IMAGE004
organize two-dimentional current matrix;
Described comparing unit is by above-mentioned
Figure DEST_PATH_361462DEST_PATH_IMAGE004
every two groups that organize in two-dimentional current matrix are carried out the registration judgement, and result is transferred to described Logic control module, and it calculates first and second registration of two groups by following formula ,
Figure DEST_PATH_DEST_PATH_IMAGE008
In formula,
Figure DEST_PATH_DEST_PATH_IMAGE010
the registration that means every two groups of electric currents,
Figure DEST_PATH_DEST_PATH_IMAGE012
with
Figure DEST_PATH_DEST_PATH_IMAGE014
the current value that means respectively described first group of two dimension current matrix,
Figure DEST_PATH_530800DEST_PATH_IMAGE012
the sampled value that means the first ammonia detector,
Figure DEST_PATH_310537DEST_PATH_IMAGE014
the sampled value that means the second ammonia detector;
Figure DEST_PATH_DEST_PATH_IMAGE016
with
Figure DEST_PATH_DEST_PATH_IMAGE018
the current value that means respectively described second group of two dimension current matrix, the sampled value that means the 3rd ammonia detector,
Figure DEST_PATH_956336DEST_PATH_IMAGE018
the sampled value that means the 4th ammonia detector;
Figure DEST_PATH_DEST_PATH_IMAGE020
mean the mean square deviation computing,
Figure DEST_PATH_DEST_PATH_IMAGE022
mean integral operation;
Be provided with a registration threshold value in described memory module ;
Described Logic control module is by the absolute value differences of registration in twos of described calculating gained and registration threshold value compare, if described registration absolute value differences is less than threshold value, conclude that wherein the smokescope of the position of two groups of ammonia detectors exceeds standard; By all calculating gained registrations respectively with the registration threshold value
Figure DEST_PATH_921198DEST_PATH_IMAGE024
compare, can conclude that the smokescope of the position of detecting in a certain group of ammonia detector exceeds standard;
Described refrigeration motor unit comprises one first exhaust controller of fan, one first spray controller and one first valve positioner;
The freezing motor unit of described list comprises one second exhaust controller of fan, one second spray controller and a second valve door controller;
Described communication unit comprises a GPRS communication module, an alarm controller and an accident notice module.
2. ammonia leakage protective device according to claim 1, is characterized in that, also is provided with a normal concentration value in described memory module with
Figure DEST_PATH_DEST_PATH_IMAGE028
.
3. ammonia leakage protective device according to claim 1, is characterized in that, described data acquisition module also comprises a coupling holding circuit, a filtering circuit, a gain amplifier circuit and a samples storage circuit, and above-mentioned each module connects in turn, wherein,
Described coupling holding circuit, it is in order to suppress electrical interference, and signal obtains the demand data waveform by filtering circuit after described coupling holding circuit, after described gain amplifier module is amplified, is reduced to original waveform; The current signal gathered transfers in described samples storage circuit and is stored after described grouped element is processed.
4. ammonia leakage protective device according to claim 2, is characterized in that, described comparing unit calculates the registration of first group of two dimension current matrix and the 3rd group of two dimension current matrix according to the following equation
Figure DEST_PATH_DEST_PATH_IMAGE030
,
In formula,
Figure DEST_PATH_321698DEST_PATH_IMAGE030
the registration that means every two groups of electric currents,
Figure DEST_PATH_52893DEST_PATH_IMAGE012
with the current value that means respectively described first group of two dimension current matrix, the sampled value that means the first ammonia detector,
Figure DEST_PATH_849183DEST_PATH_IMAGE014
the sampled value that means the second ammonia detector;
Figure DEST_PATH_DEST_PATH_IMAGE034
with
Figure DEST_PATH_DEST_PATH_IMAGE036
the current value that means respectively described the 3rd group of two dimension current matrix,
Figure DEST_PATH_247934DEST_PATH_IMAGE034
the sampled value that means the 5th ammonia detector,
Figure DEST_PATH_677779DEST_PATH_IMAGE036
the sampled value that means the 6th ammonia detector;
Figure DEST_PATH_981721DEST_PATH_IMAGE020
mean the mean square deviation computing, mean integral operation.
5. ammonia leakage protective device according to claim 4, is characterized in that, described comparing unit calculates the registration of second group of two dimension current matrix and the 3rd group of two dimension current matrix according to the following equation
Figure DEST_PATH_DEST_PATH_IMAGE038
,
In formula, the registration that means every two groups of electric currents,
Figure DEST_PATH_425362DEST_PATH_IMAGE016
with
Figure DEST_PATH_154284DEST_PATH_IMAGE018
the current value that means respectively described second group of two dimension current matrix,
Figure DEST_PATH_295415DEST_PATH_IMAGE016
the sampled value that means the first ammonia detector,
Figure DEST_PATH_793393DEST_PATH_IMAGE018
the sampled value that means the second ammonia detector; with
Figure DEST_PATH_827262DEST_PATH_IMAGE036
the current value that means respectively described the 3rd group of two dimension current matrix,
Figure DEST_PATH_772085DEST_PATH_IMAGE034
the sampled value that means the 5th ammonia detector,
Figure DEST_PATH_124569DEST_PATH_IMAGE036
the sampled value that means the 6th ammonia detector; mean the mean square deviation computing,
Figure DEST_PATH_380418DEST_PATH_IMAGE022
mean integral operation.
6. according to the described ammonia leakage protective device of claim 1 or 3, it is characterized in that, described ammonia leakage protective device also comprises that an emergency lighting unit and promptly lets out the ammonia controller, and it all is arranged in described refrigerator room and single freezing zone.
7. ammonia leakage protective device according to claim 1, is characterized in that, described data acquisition control unit device records the ammonia concentration value
Figure DEST_PATH_DEST_PATH_IMAGE042
if,
Figure DEST_PATH_DEST_PATH_IMAGE044
the concentration of this position surpasses first paragraph preset alarm value, described data acquisition control unit is to described refrigeration motor unit, single freezing motor unit, communication unit, emergency lighting unit and emergency governor sending controling instruction, alarm in it sends sound and light alarm immediately, described GPRS communication module is the mobile device transmission urgent signal to far-end by wireless telecommunications, described accident notice module sends accident information to the fire-fighting chamber, described emergency lighting unit starting emergency light, described air exhauster controller drives exhaust blower to open;
If ammonia concentration value
Figure DEST_PATH_DEST_PATH_IMAGE046
, the concentration of this position surpasses second segment preset alarm value, and described data acquisition control unit drives the first valve positioner or second valve door controller are closed vent valve and inlet valve, described the first spray controller or the second spray controller opens spray system.
8. according to the described ammonia leakage protective device of the arbitrary claim of claim 1-5, it is characterized in that, described Logic control module is a MCU processor or a PLC, and it is integrated in a switch board.
9. according to the described ammonia leakage protective device of the arbitrary claim of claim 1-5, it is characterized in that, in the freezing zone of described list, an escape door also is set and automatically opens controller, it is connected with described data acquisition control unit, and controlled by it.
CN2013203655345U 2013-06-25 2013-06-25 Ammonia leakage protection device Expired - Fee Related CN203338028U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106761566A (en) * 2016-12-07 2017-05-31 王晓龙 A kind of anti-leak environmental protecting device for offshore oil production pipeline
CN106840533A (en) * 2017-03-02 2017-06-13 佛山市顺德区环威电器有限公司 A kind of refrigerator or wine cabinet or the special small-sized ammonia refrigeration diffusion absorbing refrigerator NH_3 leakage real-time detection processing method of refrigerating box

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106761566A (en) * 2016-12-07 2017-05-31 王晓龙 A kind of anti-leak environmental protecting device for offshore oil production pipeline
CN106761566B (en) * 2016-12-07 2019-03-15 王晓龙 A kind of anti-leak environmental protecting device for offshore oil production pipeline
CN106840533A (en) * 2017-03-02 2017-06-13 佛山市顺德区环威电器有限公司 A kind of refrigerator or wine cabinet or the special small-sized ammonia refrigeration diffusion absorbing refrigerator NH_3 leakage real-time detection processing method of refrigerating box
JP2019512073A (en) * 2017-03-02 2019-05-09 佛山市順徳区環威電器有限公司Ｆｏｓｈａｎ Ｗｅｌｌｗａｙ Ｅｌｅｃｔｒｉｃ Ａｐｐｌｉａｎｃｅ Ｃｏ．，Ｌｔｄ Real-time detection method of ammonia leak of small ammonia refrigeration type diffusion absorption type refrigerator dedicated to refrigerator, wine cabinet or cooler

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