CN203376836U - Double gas pipeline line type temperature sensing fire detector - Google Patents
Double gas pipeline line type temperature sensing fire detector Download PDFInfo
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- CN203376836U CN203376836U CN201320368174.4U CN201320368174U CN203376836U CN 203376836 U CN203376836 U CN 203376836U CN 201320368174 U CN201320368174 U CN 201320368174U CN 203376836 U CN203376836 U CN 203376836U
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Abstract
The utility model relates to a double gas pipeline line type temperature sensing fire detector. The double gas pipeline line type temperature sensing fire detector comprises a box body and a number of detecting pipelines which are located outside the box body. Each detecting pipeline comprises a detecting outer pipe and a detecting inner pipe which is located in the detecting outer pipe. The detecting outer pipe is filled with a first detecting gas. The detecting inner pipe is filled with a second detecting gas. The expansion coefficients of the first detecting gas and the second detecting gas are different. Each detecting pipeline is provided with a first end and a second end corresponding to the first end. A pressure sensor which is used for measuring the outer pipe pressure value in the detecting outer pipe and the inner pipe pressure value in the detecting inner pipe in each detecting pipeline is arranged in the box body. The output end of the pressure sensor is connected with a central processor. The output end of the central processor is electrically connected with an alarm output circuit. The double gas pipeline line type temperature sensing fire detector provided by the utility model has the advantages of simple and compact structure, high detecting precision, high automation degree, wide adaptation range, safety and reliability.
Description
Technical field
The utility model relates to a kind of fire detector, especially a kind of pair of gas circuit line-type heat detector, specifically a kind of energy, for fire detector and the detection method thereof in the environment places such as all kinds of long tunnels of industrial circle, large-scale workshop, warehouse, track traffic such as the early detection of fire and electric power, metallurgy, petrochemical industry, belongs to the technical field of fire detecting and alarm.
Background technology
In the prior art, the characteristics of first generation air tubular type linear temperature sensor are that the single-pipeline list is surveyed gas circuit, gather the switching value temperature signal and implement to report to the police, and the leakage of pipeline, jam detection rely on and manually regularly pipeline are pressurizeed to realize; The characteristics of second generation air tubular type linear temperature sensor are still surveyed gas circuit for the single-pipeline list, increased pressure transducer, gather the analog quantity temperature signal and implement to report to the police, the leakage of pipeline, jam detection rely on motor regularly to drive cam gear promotion air chamber the pipeline Self-pressurizing agri are realized.
First generation air tubular type linear temperature sensor groundwork principle is when temperature during in normal condition, the air pressure of sealing and the extraneous balance that keeps in sound-pipe, even temperature generation minor fluctuations causes overpressure to raise, by bleeder port, still can make external and internal pressure maintain balance.When breaking out of fire, scene temperature sharply rises, and the air pressure in sound-pipe sharply increases, and its speed of expansion is far longer than the regulating power of bleeder port, now measures the air bellows action of air pressure change, detector generation fire alarm.There are two large shortcomings in first generation air tubular type linear temperature sensor: first, the gas leakage of sound-pipe or obstruction can not detect automatically, lean on the artificial time in accordance with regulations, adopt simple artificial method of gas injection to come signal piping whether to have and stop up or leak gas and occur, if sound-pipe leaks gas in the sense cycle interval, now breaking out of fire can't be reported to the police.The secondth, the principle of response fire is closed realization of mechanical contact that relies on the air diaphragm capsule, this switching value manner of execution has all proved that from theory and practice rate of false alarm is higher, reason is that detector is without the data analysis ability, can't judge relatively the overpressure expansion rate, and get rid of the wrong report caused by environmental temperature fluctuation.
Although second generation air tubular type linear temperature sensor makes certain improvements on the basis of first generation detector, but still existing problems.At first surveying pipeline is single-pipeline, and to survey length the longest be 100m, and such detector only can be protected 100 * 5=500 m
2zone (detector space protection area is pressed the rectangle area and calculated, and area=length * wide protects width to be around sound-pipe ± the 2.5m space); in practical engineering application; the usage quantity of detector is more, and whole construction costs is very high, and construction volume is also very large.Second, although detector has certain data analysis capabilities, but be line style owing to surveying pipeline, it is subject to the impact of environment temperature not only relevant with the height of environment temperature, also relevant with the length of surveying pipeline, and the use length of surveying pipeline is relevant with the project installation position, length is not unique, so detector can't be realized environment temperature tracking compensation truly, when the industrial site application of environment temperature frequent variations, detector still there will be false alarm.The 3rd, the self-checking unit of detector adopts is that the driven by motor camming movement occurs that certain stroke promotes air chamber and inflates self check, and usually find that in actual applications cam is difficult to accomplish all fit like a glove in the interlock process at every turn, will make like this air chamber can not be air chamber when self check in gas all beat to the greatest extent, thereby can examine end leakage failure that can not check the detection pipeline while causing self check.The 4th, what in sound-pipe, fill is normal air, and its detection sensitivity is not high enough, and is non-anti-explosion product, and range of application is restricted.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of pair of gas circuit line-type heat detector is provided, and it is simple and compact for structure, and detection accuracy is high, and automaticity is high, and wide accommodation is safe and reliable.
The technical scheme provided according to the utility model, described pair of gas circuit line-type heat detector, comprise box body and be positioned at the outer some detection pipelines of described box body, described detection pipeline comprises the detection inner tube of surveying outer tube and being positioned at described detection outer tube, survey in outer tube and be filled with the first probe gas, survey in inner tube and be filled with the second probe gas, described the first probe gas is different from the expansion coefficient of the second probe gas; Survey pipeline and there is first end and second end corresponding with described first end; Be provided for measuring the pressure transducer of surveying the outer tube atmospheric pressure value in the interior detection of pipeline outer tube and surveying the inner tube atmospheric pressure value in inner tube in described box body, the output terminal of described pressure transducer is connected with central processing unit, and the output terminal of central processing unit is electrically connected to alarm output circuit;
Central processing unit is measured the corresponding inner tube atmospheric pressure value of surveying the outer tube atmospheric pressure value of corresponding detection outer tube in pipeline and surveying inner tube by pressure transducer; Central processing unit receives pressure transducer and measures outer tube atmospheric pressure value and inner tube atmospheric pressure value, and by constant temperature fire alarming value default in described outer tube atmospheric pressure value and inner tube atmospheric pressure value and central processing unit, differential temperature fire alarming value and fault judgement alarming value relatively; When in described outer tube atmospheric pressure value and inner tube atmospheric pressure value and central processing unit, default constant temperature fire alarming value, differential temperature fire alarming value or fault judgement alarming value mates, central processing unit is by alarm output circuit output alarm or fault-signal.
Be connected for regulating the measurement air-channel system of surveying outer tube air pressure in the first end of detection outer tube and box body in described detection pipeline, be connected for regulating the compensation air-channel system of surveying inner tube air pressure in the first end of detection inner tube and box body in the detection pipeline; Central processing unit is electrically connected to measurement air-channel system and compensation air-channel system by control switching circuit, central processing unit is regulated the duty of measuring air-channel system and compensation air-channel system by control switching circuit, measuring corresponding outer tube atmospheric pressure value and the inner tube atmospheric pressure value of surveying in pipeline by pressure transducer.
Described measurement air-channel system comprises some measurement electromagnetic valve of gas circuit, the control end of measuring electromagnetic valve of gas circuit is electrically connected to control switching circuit, measuring the first end of electromagnetic valve of gas circuit is connected with the first end of surveying outer tube in corresponding detection pipeline, the second end of measuring electromagnetic valve of gas circuit is connected with measurement gas circuit afflux piece by measuring auxiliary piping, measurement gas circuit afflux piece feeds back the measurement auxiliary piping by air pressure and is connected with the measuring junction of pressure transducer, the air pressure feedback is measured auxiliary piping can be by measuring gas circuit afflux piece, measure auxiliary piping and measure electromagnetic valve of gas circuit and be connected with the corresponding detection outer tube of surveying pipeline.
Described measurement air-channel system also comprises that the measurement air pump that is positioned at box body reaches and the measurement gas tank of described measurement air pump corresponding matching, and the gas outlet of measuring air pump passes in and out tracheae by measurement and is connected with measurement gas circuit afflux piece.
Described compensation air-channel system comprises some complemental air way solenoid valves, and the control end of complemental air way solenoid valve is connected with control switching circuit; The first end of complemental air way solenoid valve is connected with the first end of surveying inner tube in corresponding detection pipeline, the second end of complemental air way solenoid valve is connected with compensation gas circuit afflux piece by the compensation auxiliary piping, compensation gas circuit afflux piece is connected with the compensation end of pressure transducer by air pressure feedback compensation auxiliary piping, and air pressure feedback compensation auxiliary piping can be connected with the corresponding detection inner tube of surveying pipeline by compensation gas circuit afflux piece, compensation auxiliary piping and complemental air way solenoid valve.
Described compensation air-channel system also comprises that the compensation air pump that is positioned at box body reaches and the compensation gas tank of described compensation air pump corresponding matching, and the gas outlet of compensation air pump passes in and out tracheae by compensation and is connected with compensation gas circuit afflux piece.
The second end of described detection pipeline is provided with sealing cap, the first end of surveying pipeline is provided with the draft tube joint, the detection outer tube of surveying in pipeline is connected with the measurement air-channel system by the draft tube joint, and the detection inner tube of surveying in pipeline is connected with the compensation air-channel system by draft tube joint and the auxiliary pipeline that accesses.
Advantage of the present utility model: survey pipeline and comprise the detection outer tube and survey inner tube, survey in outer tube and fill the first probe gas, survey in inner tube and fill the second probe gas, surveying outer tube is connected with the measurement air-channel system, surveying inner tube is connected with the compensation air-channel system, measure the outer tube force value of surveying outer tube and the inner tube force value of surveying inner tube by pressure transducer simultaneously, the false alarm that can avoid variation of ambient temperature to cause, central processing unit coordinates with control switching circuit realizes that multichannel Time share scanning mode gathers the data of multiplexed detection pipeline, can realize the automatic detection to a plurality of detection pipelines, central processing unit judges according to the detection data of each being surveyed to pipeline the duty of surveying pipeline, can result of detection that survey pipeline be carried out and alarm, and can guarantee to survey the functional reliability of pipeline, compact conformation, alarm temperature, temperature rise rate, sensitivity can be set adjustment, reduce the engineering equipment use amount, increased protected area, save equipment investment, greatly saved again artificial erected cost.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is structured flowchart of the present utility model.
Fig. 3 is workflow diagram of the present utility model.
Description of reference numerals: 1-sealing cap, 2-surveys pipeline, the 3-screw coupling, the auxiliary access of 4-pipeline, 5-draft tube joint, 6-complemental air way solenoid valve, the 7-box body, the 8-joint, 9-compensation gas circuit afflux piece, 10-compensates air pump, 11-compensates gas tank, 12-air pressure feedback compensation auxiliary piping, the 13-filter amplification circuit, the 14-central processing unit, the 15-circuit board, the 16-alarm output circuit, 17-line joint, 18-multiple signals lead-out terminal, the 19-control switching circuit, the 20-pressure transducer, 21-air pressure feedback is measured auxiliary piping, 22-measures gas tank, 23-measures air pump, the 24-installing plate, 25-measures gas circuit afflux piece, 26-measures auxiliary piping, 27-measures electromagnetic valve of gas circuit, 28-measures the turnover tracheae, 29-compensation turnover tracheae and 30-compensation auxiliary piping.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As depicted in figs. 1 and 2: in order accurately to realize that the fire equitemperature is surveyed, the utility model comprises box body 7 and is positioned at the outer some detection pipelines 2 of described box body 7, described detection pipeline 2 comprises the detection inner tube of surveying outer tube and being positioned at described detection outer tube, survey in outer tube and be filled with the first probe gas, survey in inner tube and be filled with the second probe gas, described the first probe gas is different from the expansion coefficient of the second probe gas; Survey pipeline 2 and there is first end and second end corresponding with described first end; Be provided for measuring the outer tube atmospheric pressure value of surveying in the interior detection outer tube of pipeline 2 and the pressure transducer 20 of surveying the inner tube atmospheric pressure value in inner tube in described box body 7, the output terminal of described pressure transducer 20 is connected with central processing unit 14, and the output terminal of central processing unit 14 is electrically connected to alarm output circuit 16;
Particularly, survey the detection outer tube in pipeline 2 and survey inner tube and be metal hollow pipe, survey outer tube and form coaxial distribution with the detection inner tube, the expansion coefficient of surveying the first probe gas in outer tube is greater than the expansion coefficient of surveying the second probe gas in inner tube, form the measurement pipeline so that survey outer tube, survey inner tube and form compensation conduit; During concrete enforcement, survey in outer tube and fill helium, the thermal expansivity of helium is to fill zellon gas in 1.1130E-02, detection inner tube, and its thermal expansivity is 9.7817E-04, and in surveying, the pipeline external diameter is 3mm, and the internal diameter of surveying inner tube is 2.5mm; The external diameter of surveying outer tube is 10mm, and the internal diameter of surveying outer tube is 8mm.Survey the interior detection outer tube of pipeline 2 and survey isolation mutually between inner tube, the outer every length of surveying pipeline 2 of box body 7 is at 20 ~ 200m, when the length of surveying pipeline 2 is longer, to survey pipeline 2 by screw coupling 3 links into an integrated entity, the second end of surveying pipeline 2 is provided with sealing cap 1, seal and survey outer tube and survey inner tube by sealing cap 1, and keep surveying outer tube and the isolation of surveying inner tube.At the outer detection pipeline 2 that respective numbers can be set as required of box body 7, in the utility model embodiment accompanying drawing, show outer four tunnels that arrange of box body 7 and survey pipeline 2, usually, can survey pipeline 2 on outer 16 tunnels that arrange of box body 7.Pressure transducer 20 can the outer different detection pipeline 2 of Time share scanning box body 7, to obtain corresponding outer tube atmospheric pressure value and the corresponding inner tube atmospheric pressure value of surveying in pipeline 2, central processing unit 14 judges the different duties of surveying pipeline 2 by outer tube atmospheric pressure value and inner tube atmospheric pressure value.
In order to realize the Time share scanning to surveying pipeline 2 inner and outer pipes atmospheric pressure values and outer tube atmospheric pressure value and to guarantee the corresponding detection accuracy of surveying pipeline 2, the first end of the interior detection outer tube of described detection pipeline 2 is connected for regulating the measurement air-channel system of surveying outer tube air pressure with box body 7 is interior, in the first end of the interior detection inner tube of detection pipeline 2 and box body 7, for regulating the compensation air-channel system of surveying inner tube air pressure, is connected; Central processing unit 14 is connected with measurement air-channel system and compensation air-channel system by control switching circuit 19, central processing unit 14 is regulated the duty of measuring air-channel system and compensation air-channel system by control switching circuit 19, measuring corresponding outer tube atmospheric pressure value and the inner tube atmospheric pressure value of surveying in pipeline 2 by pressure transducer 20.
Particularly, described measurement air-channel system comprises some measurement electromagnetic valve of gas circuit 27, the control end of measuring electromagnetic valve of gas circuit 27 is electrically connected to control switching circuit 19, the first end of measuring electromagnetic valve of gas circuit 27 is connected with the first end of the interior detection outer tube of corresponding detection pipeline 2, the second end of measuring electromagnetic valve of gas circuit 27 is connected with measurement gas circuit afflux piece 25 by measuring auxiliary piping 26, measurement gas circuit afflux piece 25 feeds back measurement auxiliary piping 20 by air pressure and is connected with the measuring junction of pressure transducer 20, the air pressure feedback is measured auxiliary piping 20 can be by measuring gas circuit afflux piece 25, measure auxiliary piping 26 and measure electromagnetic valve of gas circuit 27 and be connected with the corresponding detection outer tube of surveying pipeline 2.
The quantity of measuring electromagnetic valve of gas circuit 27 is consistent with the quantity of surveying pipeline 2, measures electromagnetic valve of gas circuit 27 and connects one to one with the detection outer tube of surveying in pipeline 2.In the utility model embodiment, the outer draft tube joint 5 that arranges of box body 7, the detection outer tube of surveying pipeline 2 passes through draft tube joint 5 and is communicated with the first end of measuring electromagnetic valve of gas circuit 27, by draft tube joint 5, realizes that the detection outer tube of surveying pipelines 2 connects one to one with measurement electromagnetic valve of gas circuit 27.The second end of measuring electromagnetic valve of gas circuit 27 is provided with joint 8 and is connected with an end of measuring auxiliary piping 26, measure the other end of auxiliary piping 26 and joint 8 on measurement gas circuit afflux piece 25 and be connected, and be connected with gas circuit afflux piece 25 by joint 8, measure the quantity that joint 8 is set on gas circuit afflux piece 25 consistent with the quantity of measuring electromagnetic valve of gas circuit 27, with can with 27 corresponding connections of measurement electromagnetic valve of gas circuit.The end that the air pressure feedback is measured auxiliary piping 20 is connected with an end of measuring gas circuit afflux piece 25, and the other end is connected with the measuring junction of pressure transducer 20.
When measurement electromagnetic valve of gas circuit 27 is opened, the detection outer tube of the detection pipeline 2 be connected with the described measurement electromagnetic valve of gas circuit 27 of opening can be measured auxiliary piping 20 with the air pressure feedback and be connected by measurement electromagnetic valve of gas circuit 27, measurement auxiliary piping 26, measurement gas circuit afflux piece 25, thereby pressure transducer 20 can obtain the outer tube atmospheric pressure value of the interior detection outer tube of corresponding detection pipeline 2.When in box body 7, remaining measurement electromagnetic valve of gas circuit 27 is closed, the detection pipeline 2 be connected with the measurement electromagnetic valve of gas circuit 27 of closing turn-offs with the air pressure feedback and measures being communicated with of auxiliary piping 20, thereby can realize the measurement to the outer tube atmospheric pressure value of the detection outer tube of each road detection pipeline 2.Measuring the on off state of electromagnetic valve of gas circuit 27 is regulated and controls by control switching circuit 19 by central processing unit 14, in the utility model embodiment, control switching circuit 19 adopts relay to realize, control switching circuit 19 comprises some relays, realizes the open and-shut mode of different measurement electromagnetic valve of gas circuit 27 by different relays.
Described measurement air-channel system also comprises that the measurement air pump 23 that is positioned at box body 7 reaches and the measurement gas tank 22 of described measurement air pump 23 corresponding matching, and the gas outlet of measuring air pump 23 passes in and out tracheae 28 by measurement and is connected with measurement gas circuit afflux piece 25.
Described measurement gas circuit afflux piece 25 is equivalent to three-way device, measure air pump 23 and measure gas tank 22 corresponding matching, the outer tube atmospheric pressure value that can survey the interior detection outer tube of pipeline 2 to difference is regulated, measuring air pump 23 can pass in and out tracheae 28 by measurement, measures gas circuit afflux piece 25, measure auxiliary piping 26 and corresponding 27 pairs of detection outer tubes of surveying in pipelines 2 of measurement electromagnetic valve of gas circuit are inflated or bleed, to meet the different operating requirement of surveying pipeline 2, improve the investigative range of surveying pipeline 2, and can guarantee to survey the use safety of pipeline 2.Particularly, the control end of measuring air pump 23 is electrically connected to above-mentioned control switching circuit 19, central processing unit 14 obtains the different outer tube force value of surveying the interior detection outer tube of pipeline 2 by pressure transducer 20, when corresponding outer tube force value need to be adjusted, central processing unit 14 regulates by control switching circuit 19 duty of measuring air pump 23, by measuring air pump 23 and measuring the adjusting that gas tank 22 is realized air pressure, easy to operate.
Described compensation air-channel system comprises some complemental air way solenoid valves 6, and the control end of complemental air way solenoid valve 6 is electrically connected to control switching circuit 19; The first end of complemental air way solenoid valve 6 is connected with the first end of the interior detection inner tube of corresponding detection pipeline 2, the second end of complemental air way solenoid valve 6 is connected with compensation gas circuit afflux piece 9 by compensation auxiliary piping 30, compensation gas circuit afflux piece 9 is connected with the compensation end of pressure transducer 20 by air pressure feedback compensation auxiliary piping 12, and air pressure feedback compensation auxiliary piping 12 can be connected with the corresponding detection inner tube of surveying pipeline 2 by compensation gas circuit afflux piece 9, compensation auxiliary piping 30 and complemental air way solenoid valve 6.
The quantity of complemental air way solenoid valve 6 is consistent with the quantity of measuring electromagnetic valve of gas circuit 27, the first end of complemental air way solenoid valve 6 is connected with draft tube joint 5 by auxiliary access pipeline 4, and be connected with the detection inner tube in surveying pipeline 2 by draft tube joint 5, in the utility model embodiment, the detection inner tube in complemental air way solenoid valve 6 and detection pipeline 2 is also for connecting one to one.The second end of complemental air way solenoid valve 6 is connected with an end of compensation auxiliary piping 30 by joint 8, the other end of compensation auxiliary piping 30 with compensate gas circuit afflux piece 9 on the corresponding connection of joint 8, one end of compensation gas circuit afflux piece 9 is connected with air pressure feedback compensation auxiliary piping 12, and the other end of air pressure feedback compensation auxiliary piping 12 is connected with the compensation end of pressure transducer 20.In the utility model embodiment, pressure transducer 20 obtains the inner tube atmospheric pressure value of surveying the interior detection inner tube of pipeline 2 process by air pressure feedback compensation auxiliary piping 12 is similar with the outer tube atmospheric pressure value of measuring detection pipeline 2.Particularly, the control end of complemental air way solenoid valve 6 is connected with control switching circuit 19, control switching circuit 19 can be opened simultaneously or close simultaneously with same road and be surveyed measurement electromagnetic valve of gas circuit 27 and the complemental air way solenoid valve 6 that pipeline 2 is connected, and pressure transducer 20 obtains same road simultaneously and surveys outer tube atmospheric pressure value and the inner tube atmospheric pressure value in pipeline 2.Structure, the function and measure gas circuit afflux piece 25 of compensation gas circuit afflux piece 9 are identical.
Described compensation air-channel system also comprises that the compensation air pump 10 that is positioned at box body 7 reaches and the compensation gas tank 11 of described compensation air pump 10 corresponding matching, and the gas outlet of compensation air pump 10 passes in and out tracheae 29 by compensation and is connected with compensation gas circuit afflux piece 9.In the utility model embodiment, the effect of compensation air pump 10 and compensation gas tank 11 is with measurement air pump 23 and measure the similar of gas tank 22.The control end of compensation air pump 10 also is connected with control switching circuit 19, by control switching circuit 19 regulate the duties that compensate air pump 10.Pressure transducer 20 is connected with the input end of central processing unit 14 by filter amplification circuit 13, can improve the precision of pressure transducer 20 input signals by filter amplification circuit 13, reduces and disturbs.
In the utility model embodiment, be provided with installing plate 24 and circuit board 15 in box body 7, wherein, measure electromagnetic valve of gas circuit 27, measure gas circuit afflux piece 25, measure air pump 23, measure gas tank 22, complemental air way solenoid valve 6, compensation gas circuit afflux piece 9, compensation air pump 10 and compensation gas tank 11 all be positioned on installing plate 24.Filter amplification circuit 13, central processing unit 14, alarm output circuit 16, control switching circuit 19 and pressure transducer 20 all are positioned on circuit board 15.Central processing unit 14 adopts single-chip microcomputer or other micro-chip processors.In addition, also be provided with multiple signals lead-out terminal 18 on circuit board 15, described multiple signals lead-out terminal 18 is connected with the output terminal of alarm output circuit 16, by multiple signals lead-out terminal 18, alerting signal is outwards outputed to the outside of box body 7.The outside of box body 7 also is provided with line joint 17, by line joint 17, can provide required working power for the equipment on circuit board 15 and installing plate 24,, the signal of multiple signals lead-out terminal 18 further can be exported simultaneously.
The utility model is when surveying the residing regional breaking out of fire of pipeline 2 or local overheating, measurement gas (thermal expansivity the is higher) expansion of surveying sealing in outer tube makes to survey the interior pressure of outer tube to be increased by certain speed, surveys compensation gas (thermal expansivity the is lower) pressure sealed in inner tube substantially unchanged.The gas pressure value of surveying in outer tube is detected by pressure transducer 20 with the gas pressure value of surveying in inner tube simultaneously, be converted to electric signal through pressure transducer 20, electric signal inputs to central processing unit 14 by filter amplification circuit 13, central processing unit 14 gathers pressure data, process sequential through the data of setting, whether the zone that judgement detection pipeline 2 monitors is in reporting to the police or malfunction, if in reporting to the police or malfunction, drive alarm output circuit 16 to implement to report to the police, central processing unit 14 can carry out the detection switching of 2 of a plurality of detection pipelines by control switching circuit 19, realize the collection respectively of different line pressure signal, thereby realize the Data Detection to a plurality of detection pipelines 2, realize the detection process of multichannel.
In order to realize detection, detection method of the present utility model comprises the steps:
A, required detection pipeline 2 is set, and described detection pipeline 2 is connected with pressure transducer 20 and central processing unit 14 couplings;
B, obtain the first atmospheric pressure value of surveying in pipeline 2 by pressure transducer 20, the first atmospheric pressure value that pressure transducer 20 will be measured detection pipeline 2 transfers in central processing unit 14, and central processing unit 14 records corresponding very first time value; Described the first atmospheric pressure value comprises the first outer tube atmospheric pressure value of surveying outer tube and the first inner tube atmospheric pressure value of surveying inner tube;
C, second time value of central processing unit 14 through setting, again gather pressure transducer 20 and survey pipeline 2 second atmospheric pressure value corresponding with the second time value to obtain, described the second atmospheric pressure value comprises the second outer tube atmospheric pressure value of surveying outer tube and the second inner tube atmospheric pressure value of surveying inner tube;
D, central processing unit 14 obtain the air pressure difference according to the second atmospheric pressure value of surveying pipeline 2 and the first atmospheric pressure value of surveying pipeline 2, central processing unit 14 by default constant temperature fire alarming value in described air pressure difference relatively, when described air pressure difference and constant temperature fire alarming value coupling, central processing unit 14 is by alarm output circuit 16 output constant temperature alerting signals, otherwise central processing unit 14 proceeds to step e;
E, central processing unit 14 obtain the time difference according to described the second time value and very first time value, and the differential temperature fire alarming value in the ratio of the air pressure difference that described steps d is obtained and described time difference and central processing unit 14 relatively, when the ratio of described air pressure difference and time difference and differential temperature fire alarming value coupling, central processing unit 14 is by alarm output circuit 16 output constant temperature alerting signals, otherwise central processing unit 14 proceeds to step f;
F, central processing unit 14 will be surveyed the second atmospheric pressure value of pipeline 2 and default fault judgement alarming value compares, when the second atmospheric pressure value of described detection pipeline 2 and default fault judgement alarming value coupling, central processing unit 14 is surveyed the pipeline fault-signals by alarm output circuit 16 outputs.
In the utility model embodiment, constant temperature fire alarming value, differential temperature fire alarming value and fault judgement alarming value are surveyed requirement according to the difference of surveying pipeline 2, analysis by lot of experimental data obtains, constant temperature fire alarming value, differential temperature fire alarming value and fault judgement alarming value are used and survey the difference that requires and slightly different according to the difference of surveying pipeline 2, no longer equally describe in detail herein.
As shown in Figure 3: for utilizing detection pipeline 2, survey for the first time and the follow-up process flow diagram of repeatedly surveying.Power on the operation after, at first central processing unit 14 carries out program initialization, the typical constant temperature fire alarming value A that data register zero clearing and transferring has been stored, typical differential temperature fire combustion alarming value B and typical fault judgement alarming value C, the air pump of control survey simultaneously 23 and compensation air pump 10, make to measure air-channel system and the compensation air-channel system all keeps certain pressure.Then regulate by central processing unit 14 and control switching circuit 19 open and-shut mode of measuring electromagnetic valve of gas circuit 27 and corresponding complemental air way solenoid valve 6, to gather initial value data V10, the V20 of multiplexed detection pipeline 2 by pressure transducer 20 ... Vn0, record initial time T10, the T20 of multi pass acquisition ... Tn0, each primary data of surveying pipeline 2 records complete, starts to enter the alarm decision sequential.
At first central processing unit 14 gathers by pressure transducer 20 the current atmospheric pressure value V1 that the first via is surveyed pipeline 2, and record current time T1, whether the air pressure difference of judging V1-V10 is greater than constant temperature fire alarming value A, if be greater than constant temperature fire alarming value A, think that first via detection pipeline 2 meets constant temperature and reports to the police, drive alarm output circuit 16 to implement fire alarm, if the first via is surveyed the air pressure difference of the V1-V10 of pipeline 2, be less than constant temperature fire alarming value A; Whether judgement (V1-V10)/(T1-T10) is greater than differential temperature fire alarming value B, if be greater than differential temperature fire alarming value B, thinks that first via detection pipeline 2 meets differential temperature and reports to the police, and drives alarm output circuit 16 to implement fire alarms.If above-mentioned two judgements all are false, judge whether current atmospheric pressure value V1 is less than fault judgement alarming value C, if be less than fault judgement alarming value C, think that leaking appears in first via detection pipeline 2, drives alarm output circuit 16 to implement fault alarm.Now, detection and the detection process of the first via detection pipeline 2 outside 14 pairs of box bodys of central processing unit 7 are disposed.
The data of surveying pipeline 2 when the first via are disposed, central processing unit 14 is controlled gas circuit by control switching circuit 19 and is switched to the second tunnel detection pipeline 2, gather the second tunnel current data V2 by pressure transducer 20 and measurement electromagnetic valve of gas circuit 27 with complemental air way solenoid valve 6, record current sampling time T2, whether the difference of judging V2-V20 is greater than constant temperature fire alarming value A, if be greater than constant temperature fire alarming value A, think that the result of detection of the second tunnel detection pipeline 2 meets the constant temperature warning, drive alarm output circuit 16 to implement fire alarm, if surveying the result of detection of pipeline, the second tunnel do not meet the constant temperature warning, whether judgement (V2-V20)/(T2-T20) is greater than differential temperature fire alarming value B, if be greater than differential temperature fire alarming value B, think that the result of detection of the second tunnel detection pipeline 2 meets the differential temperature warning, drive alarm output circuit 16 to implement fire alarm.If above-mentioned two deterministic processes all are false, whether the atmospheric pressure value V2 that judges the second tunnel detection pipeline 2 is less than fault judgement alarming value C, if be less than fault judgement alarming value C, think that leaking appears in the second tunnel detection pipeline 2, drives alarm output circuit 16 to implement fault alarm.
The like, central processing unit 14 switches successively complemental air way solenoid valve 6 and measures electromagnetic valve of gas circuit 27 by control switching circuit 19, surveys in pipeline 2(the utility model embodiment n≤16 until gas circuit switches to last n road, during concrete enforcement, n can arrange as required).When central processing unit 14 gathers by pressure transducer 20 the current atmospheric pressure value Vn that pipeline 2 is surveyed on the n road, record current time Tn, whether the difference of judging Vn-Vn0 is greater than constant temperature fire alarming value A, if be greater than constant temperature fire alarming value A, think that the result of detection of n road detection pipeline 2 meets the constant temperature warning, drive alarm output circuit 16 to implement fire alarm, if surveying the result of detection of pipeline 2, the n road do not meet the constant temperature warning, whether judgement (Vn-Vn0)/(Tn-Tn0) is greater than differential temperature fire alarming value B, if be greater than differential temperature fire alarming value B, think that the result of detection of n road detection pipeline 2 meets the differential temperature warning, drive alarm output circuit 16 to implement fire alarm.If above-mentioned two deterministic processes all are false, judge whether current atmospheric pressure value Vn is less than fault judgement alarming value C, if be less than fault judgement alarming value C, think that leaking appears in n road detection pipeline 2, drives alarm output circuit 16 to implement fault alarm.The n road is surveyed pipeline 2 data and is disposed, central processing unit 14 is again controlled gas circuit by control switching circuit 19 and is switched to first via detection pipeline 2, repeat the above-mentioned first via and survey pipeline 2 is surveyed pipeline 2 data judgement flow process to the n road, judge in the n road simultaneously and whether a road is arranged in alarm condition, if the n road is surveyed pipeline 2 and is not all reported to the police, carry out environment temperature and follow the tracks of compensation, replace primary data by current data, initial value as next cycle, be that V1 replaces V10, V2 replaces V20, Vn replaces Vn0, if arbitrary road is in fire alarm or fault-alarming state, execution environment Temperature Tracking Compensation sequential not, so that timely checking the fire alarm situation.
The utility model is surveyed pipeline 2 and is comprised the detection outer tube and survey inner tube, survey in outer tube and fill the first probe gas, survey in inner tube and fill the second probe gas, surveying outer tube is connected with the measurement air-channel system, surveying inner tube is connected with the compensation air-channel system, measure the outer tube force value of surveying outer tube and the inner tube force value of surveying inner tube by pressure transducer 20 simultaneously, the false alarm that can avoid variation of ambient temperature to cause, central processing unit 14 coordinates with control switching circuit 19 realizes that multichannel Time share scanning mode gathers the data of multiplexed detection pipeline 2, can realize the automatic detection to a plurality of detection pipelines 2, central processing unit 14 judges according to the detection data of each being surveyed to pipeline 2 duty of surveying pipeline 2, can result of detection that survey pipeline 2 be carried out and alarm, and can guarantee to survey the functional reliability of pipeline 2, compact conformation, alarm temperature, temperature rise rate, sensitivity can be set adjustment, reduce the engineering equipment use amount, increased protected area, save equipment investment, greatly saved again artificial erected cost.
Claims (7)
1. a two gas circuit line-type heat detector, it is characterized in that: comprise box body (7) and be positioned at the outer some detection pipelines (2) of described box body (7), described detection pipeline (2) comprises the detection inner tube of surveying outer tube and being positioned at described detection outer tube, survey in outer tube and be filled with the first probe gas, survey in inner tube and be filled with the second probe gas, survey pipeline (2) and there is first end and second end corresponding with described first end; Be provided for measuring the pressure transducer (20) of surveying the outer tube atmospheric pressure value in the interior detection of pipeline (2) outer tube and surveying the inner tube atmospheric pressure value in inner tube in described box body (7), the output terminal of described pressure transducer (20) is connected with central processing unit (14), and the output terminal of central processing unit (14) is electrically connected to alarm output circuit (16).
2. according to claim 1 pair of gas circuit line-type heat detector, it is characterized in that: be connected for regulating the measurement air-channel system of surveying outer tube air pressure in the first end of detection outer tube and box body (7) in described detection pipeline (2), be connected for regulating the compensation air-channel system of surveying inner tube air pressure in the first end of detection inner tube and box body (7) in detection pipeline (2); Central processing unit (14) is electrically connected to measurement air-channel system and compensation air-channel system by control switching circuit (19), central processing unit (14) is regulated the duty of measuring air-channel system and compensation air-channel system by control switching circuit (19), can pass through pressure transducer (20), measure corresponding outer tube atmospheric pressure value and the inner tube atmospheric pressure value of surveying in pipeline (2).
3. according to claim 2 pair of gas circuit line-type heat detector, it is characterized in that: described measurement air-channel system comprises some measurement electromagnetic valve of gas circuit (27), the control end of measuring electromagnetic valve of gas circuit (27) is electrically connected to control switching circuit (19), measuring the first end of electromagnetic valve of gas circuit (27) is connected with the first end of surveying outer tube in corresponding detection pipeline (2), the second end of measuring electromagnetic valve of gas circuit (27) is connected with measurement gas circuit afflux piece (25) by measuring auxiliary piping (26), measurement gas circuit afflux piece (25) feeds back measurement auxiliary piping (20) by air pressure and is connected with the measuring junction of pressure transducer (20), the air pressure feedback is measured auxiliary piping (20) can be by measuring gas circuit afflux piece (25), measure auxiliary piping (26) and measure electromagnetic valve of gas circuit (27) and be connected with the corresponding detection outer tube of surveying pipeline (2).
4. according to claim 3 pair of gas circuit line-type heat detector, it is characterized in that: described measurement air-channel system also comprises that the measurement air pump (23) that is positioned at box body (7) reaches and the measurement gas tank (22) of described measurement air pump (23) corresponding matching, and the gas outlet of measuring air pump (23) passes in and out tracheae (28) by measurement and is connected with measurement gas circuit afflux piece (25).
5. according to claim 2 pair of gas circuit line-type heat detector, it is characterized in that: described compensation air-channel system comprises some complemental air way solenoid valves (6), the control end of complemental air way solenoid valve (6) is electrically connected to control switching circuit (19), the first end of complemental air way solenoid valve (6) is connected with the first end of surveying inner tube in corresponding detection pipeline (2), the second end of complemental air way solenoid valve (6) is connected with compensation gas circuit afflux piece (9) by compensation auxiliary piping (30), compensation gas circuit afflux piece (9) is connected with the compensation end of pressure transducer (20) by air pressure feedback compensation auxiliary piping (12), air pressure feedback compensation auxiliary piping (12) can be by compensation gas circuit afflux piece (9), compensation auxiliary piping (30) and complemental air way solenoid valve (6) are connected with the corresponding detection inner tube of surveying pipeline (2).
6. according to claim 5 pair of gas circuit line-type heat detector, it is characterized in that: described compensation air-channel system also comprises that the compensation air pump (10) that is positioned at box body (7) reaches and the compensation gas tank (11) of described compensation air pump (10) corresponding matching, and the gas outlet of compensation air pump (10) passes in and out tracheae (29) by compensation and is connected with compensation gas circuit afflux piece (9).
7. according to claim 2 pair of gas circuit line-type heat detector, it is characterized in that: the second end of described detection pipeline (2) is provided with sealing cap (1), the first end of surveying pipeline (2) is provided with draft tube joint (5), the detection outer tube of surveying in pipeline (2) is connected with the measurement air-channel system by draft tube joint (5), and the detection inner tube of surveying in pipeline (2) is connected with the compensation air-channel system by draft tube joint (5) and the auxiliary pipeline (4) that accesses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320368174.4U CN203376836U (en) | 2013-06-25 | 2013-06-25 | Double gas pipeline line type temperature sensing fire detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320368174.4U CN203376836U (en) | 2013-06-25 | 2013-06-25 | Double gas pipeline line type temperature sensing fire detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203376836U true CN203376836U (en) | 2014-01-01 |
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ID=49839355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320368174.4U Expired - Lifetime CN203376836U (en) | 2013-06-25 | 2013-06-25 | Double gas pipeline line type temperature sensing fire detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203376836U (en) |
-
2013
- 2013-06-25 CN CN201320368174.4U patent/CN203376836U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUXI SHENGMIN SENSOR TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LIU XING Effective date: 20150527 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150527 Address after: 214028, No. four, No. 19-1 Road, Wuxi New District, Jiangsu Patentee after: WUXI SHENGMIN SENSING TECHNOLOGY Co.,Ltd. Address before: 41-401 room 214028, Xinzhou garden, New District, Jiangsu, Wuxi Patentee before: Liu Xing |
|
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 214028, No. four, No. 19-1, Wuxi New District, Jiangsu Patentee after: WUXI SHENGMIN SENSING TECHNOLOGY Co.,Ltd. Address before: 214028, No. four, No. 19-1 Road, Wuxi New District, Jiangsu Patentee before: Wuxi Shengmin Sensing Technology Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140101 |
|
| CU01 | Correction of utility model | ||
| CU01 | Correction of utility model |
Correction item: Termination upon expiration of patent Correct: Revocation of Patent Expiration and Termination False: Expiration and Termination of 39 Volume 2801 Patent on July 11, 2023 Number: 28-01 Volume: 39 |