CN202274972U - Capacitance sensing type bag deduster leak detector - Google Patents
Capacitance sensing type bag deduster leak detector Download PDFInfo
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- CN202274972U CN202274972U CN2011203523671U CN201120352367U CN202274972U CN 202274972 U CN202274972 U CN 202274972U CN 2011203523671 U CN2011203523671 U CN 2011203523671U CN 201120352367 U CN201120352367 U CN 201120352367U CN 202274972 U CN202274972 U CN 202274972U
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Abstract
The utility model provides a capacitance sensing type bag deduster leak detector which includes an M number of air exhausting pipe solenoid valves which are corresponding to filter chambers in a bag deduster, an air inlet pipe solenoid valve, a swirl flow member, a suction pump, a backwind pipe, a variable dielectric constant plate capacitance sensor, a measuring circuit board, a dust cleaning solenoid valve, and a host computer. In the capacitance sensing type bag deduster leak detector, bigger dust particles are separated out via the swirl flow member, and then the bigger dust particles fall into the variable dielectric constant plate capacitance sensor to change the capacitance. The capacitance change is converted into the voltage change via the measuring circuit board. The calibration can be realized through utilizing the linear relation between the dust amount and a dielectric constant, so the output voltage can directly indicates the dust amount, and consequently the leak detection false alarm is prevented, and the reliability is high. Besides, the capacitance sensing method solves the probe pollution problem in leak detection, and the dust quantitative and qualitative analysis can be realized, and the maintenance workload is small.
Description
Technical field
The utility model relates to the monitoring technical field of sack cleaner, specifically is a kind of capacitance sensing type leak detector of bag-type dust remover.
Background technology
Sack cleaner is widely used in the market a kind of high-efficiency dust remover, and its mechanism of action is dust-contained airflow when passing through filter bag, and dust is filtered under the effect of acting forces such as filtration, collision, static.Filter bag in the process of using since the effect of high temperature, acidity, atmospheric pressure etc. local down can produce be out of shape, wear out, tear etc. cause the filter bag leakage, if untimely discovery is changed, the filter bag of leakage just can increase, and finally causes the sack cleaner inefficacy.
Leak detector of bag-type dust remover is in order to let sack cleaner under normal operation, change leak-off pocket, and whether the filter bag that is used to the continuous on-line detection sack cleaner has damaged instrument.One tablecloth bag dust collector has several filter chambers, and has dozens of to arrive hundreds of filter bags in each filter chamber.Behind the filter bag damage of sack cleaner, the dust emission concentration in the gas is anxious to be increased, and at this moment, leak locator can send alerting signal, and can reflect it is to have cloth bag damaged in which filter chamber.So, as long as close the draft tube valve that this has the damaged filter chamber of cloth bag, open the top cover of this filter chamber, just can easily find out damaged cloth bag, thereby make bag-type dust removal system under the situation of normal operation, change leak-off pocket.
The method of cloth bag leak detection commonly used has: artificial leak detection, light sensing method, electric charge induction method and β rays method.Because the work of artificial leak detection is loaded down with trivial details, no longer selects the method at present for use.Therefore back three kinds of methods commonly used are at present carried out the cloth bag leak detection.
The light sensing method is to utilize the dust be suspended in the gas that the light that sees through in the gas is had abated effect, and when light beam during through dusty gas, luminous flux will change, and the indirect reflection of the variation of luminous flux the variation of Dust Capacity.But the method must be demarcated when handling different dust in advance; Different dust is also different to optical absorption; This method is vulnerable to the influence of external stray light, and therefore hunting leak with the light sensing method occurs very mistake easily, and the workload of its maintenance and demarcation is big.
The electric charge induction method mainly is to measure the dustiness in the clean flue gas in the sack cleaner through the size variation of measuring the quantity of electric charge.The method should be when dust concentration is high more on principle of work, and its quantity of electric charge is big more.But its charged ability of different dust is different, and what have is charged easily, and what have is not charged, is not very high with its accuracy rate of electric charge induction leak detection therefore.The voltage and the dustiness of its output do not have corresponding relationship when adopting the electric charge induction method, can only judge qualitatively, can not do quantitative test, and this leak hunting method is subject to the external condition influence, does not also have effective measures to overcome at present.
Whether the β rays method promptly is run-down through measuring whether the exceed standard cloth bag of judging fly-ash separator of Dust Capacity in the ash-laden gas.Because after the β ray passed flue gas to be measured, its strength retrogression's degree was only relevant with the dust in flue gas content that is penetrated, and irrelevant with physics, the chemical property of dust.Leak detection mechanism by this method can be known, the dust skewness of collecting on the filter paper causes measurement result error to occur easily, and what adopt is radioactive isotope because the β ray radiation source is general, thus the method not energy measurement contain the dust of radiomaterial.
In addition, no matter be the sensor-type leak locator of light, or the charge inductive type leak locator, probe (sensor) all directly contacts with flue dust, and it is very easily contaminated to pop one's head in, and causes wrong report, even causes leak locator to lose efficacy.Therefore, the anti-pollution problem of existing leak detector of bag-type dust remover probe never obtains fine solution.
Summary of the invention
In view of this, the fundamental purpose of the utility model is to provide the capacitance sensing type leak detector of bag-type dust remover that a kind of measuring accuracy is high, leak detection does not have wrong report, probe is pollution-free, measurement is reliable and stable and maintenance workload is little.
A kind of capacitance sensing type leak detector of bag-type dust remover; Comprise corresponding exhaust tube solenoid valve, draft tube solenoid valve, eddy flow, aspiration pump, backwind tube, change specific inductive capacity formula capacity plate antenna sensor, metering circuit plate, deashing solenoid valve and the host computer of filter chamber in M and the sack cleaner; One end of M exhaust tube solenoid valve respectively with sack cleaner in the corresponding mutual UNICOM of filter chamber; The other end of M exhaust tube solenoid valve is connected through the draft tube of draft tube solenoid valve with eddy flow; The gas outlet of eddy flow is connected with the inlet tube of backwind tube with the main air blower of sack cleaner through aspiration pump; The ash discharging pipe of eddy flow is positioned at and becomes directly over the specific inductive capacity formula capacity plate antenna sensor; Become specific inductive capacity formula capacity plate antenna sensor and metering circuit plate and electrically connect, between two pole plates of capacity plate antenna sensor, metering circuit plate, a M exhaust tube solenoid valve, draft tube solenoid valve and deashing solenoid valve electrically connect with host computer respectively the deashing solenoid valve through piping erection.
The capacitance sensing type leak detector of bag-type dust remover that the utility model embodiment provides has the following advantages:
1, the utility model embodiment judges according to the appearance whether larger particles is arranged in the flue gas that emits whether sack cleaner has the run-down phenomenon of filter bag.The a small amount of dusty gas that adopts eddy flow to extract out carries out gas solid separation, if the filter bag of sack cleaner is run-down, the dust of larger particles must be arranged in the air-flow.Adopt eddy flow that the dust separation of larger particles is come out; Dust is fallen into become in the specific inductive capacity formula capacitive transducer, cause electric capacity to change, behind corresponding metering circuit and A/D converter; Can convert capacitance variations into change in voltage; Be linear change through dust quality and its specific inductive capacity within the specific limits, utilize the linear relationship calibration of Dust Capacity and its specific inductive capacity, thereby make output voltage directly indicate Dust Capacity.So do not have leak detection wrong report phenomenon, reliability height.
2, the utility model embodiment is connected with filter chamber in the sack cleaner through the exhaust tube solenoid valve, and gas outlet is connected with the inlet tube of main air blower with backwind tube through aspiration pump, so the energy consumption of the utility model is low, noise is little.
3, the utility model embodiment uses and becomes specific inductive capacity formula capacity plate antenna sensor, even hunt leak with the electric capacity method for sensing, so there is not the probe pollution problem; Use the capacitance sensing method to realize quantitatively and qualitative analysis in addition, and maintenance workload is little to dust.
Description of drawings
Fig. 1 is the structural representation of the utility model capacitance sensing type leak detector of bag-type dust remover;
Fig. 2 is voltage and the variation relation figure of Dust Capacity when boiler fly ash gets into plate condenser;
Fig. 3 is the main flow chart of the leak detection program of the utility model.
Among the figure: 1-exhaust tube solenoid valve, 2-sack cleaner, 3-filter chamber, 4-main air blower, 5-backwind tube; 6-draft tube solenoid valve, 7-flowmeter, 8-draft tube, 8-gas outlet, 10-aspiration pump; The 11-whirl cylinder, 12-rotating flow cone, 13-ash discharging pipe, 14-become specific inductive capacity formula capacity plate antenna sensor, 15-box body; 16-metering circuit plate, 17-lead, 18-deashing solenoid valve, 19-host computer.
Embodiment
To combine the accompanying drawing in the utility model below, the technical scheme in the utility model will be carried out clear, intactly description.
As shown in Figure 1, the utility model capacitance sensing type leak detector of bag-type dust remover comprises exhaust tube solenoid valve 1, draft tube solenoid valve 6, deashing solenoid valve 18, eddy flow, aspiration pump 10, backwind tube 5, change specific inductive capacity formula capacity plate antenna sensor 14, metering circuit plate 16, deashing solenoid valve 18 and the host computer 19 that filter chamber in M and the sack cleaner 23 is corresponding.Sack cleaner described in the present embodiment 2 includes 5 filter chambers 3, so the capacitance sensing type leak detector of bag-type dust remover of present embodiment comprises 5 corresponding with it exhaust tube solenoid valves 1.
Said eddy flow comprises draft tube 8, gas outlet 9, whirl cylinder 11, rotating flow cone 12 and ash discharging pipe 13.Whirl cylinder 11 is that internal diameter is the cylinder of 30～60mm; Draft tube 8 is fixedly mounted on the whirl cylinder 11; Gas outlet 9 is fixedly mounted on the top board center of whirl cylinder 11; The upper end of rotating flow cone 12 is installed on the whirl cylinder 11, is positioned at 2/3～3/4 high place of whirl cylinder 11 cylindrical shells, the lower port of rotating flow cone 12 and ash discharging pipe 13 sealed attachment.
Become specific inductive capacity formula capacity plate antenna sensor 14 and be installed in the box body 15, said box body 15 can seal.The ash discharging pipe 13 and said box body 15 sealed attachment of eddy flow, and the ash discharging pipe 13 of eddy flow is positioned at directly over the change specific inductive capacity formula capacity plate antenna sensor 14.Become specific inductive capacity formula capacity plate antenna sensor 14 and electrically connect through lead and metering circuit plate 16, metering circuit plate 16 can be provided with an external power supply.
One end of 5 exhaust tube solenoid valves 1 respectively with sack cleaner 2 in corresponding filter chamber 3 mutual UNICOMs; The other end of 5 exhaust tube solenoid valves 1 is UNICOM mutually; Be connected with draft tube solenoid valve 6 through pipeline; Between two pole plates of capacity plate antenna sensor 14, draft tube solenoid valve 6 is connected through the draft tube 8 of pipeline with eddy flow deashing solenoid valve 18 through piping erection, and deashing solenoid valve 18 is air valves; Directly and atmosphere, the gas outlet 9 that is positioned at the sub-top of eddy flow is connected with the inlet tube of backwind tube 5 with the main air blower 4 of sack cleaner 2 through aspiration pump 10.On the pipeline of aspiration pump 10 flowmeter 7 can be set.
Metering circuit plate 16,5 exhaust tube solenoid valves 1, draft tube solenoid valve 6 and deashing solenoid valves 18 electrically connect with host computer 19 respectively, and leak detection software is housed in the host computer 19.
The gas velocity scope that gets in the whirl cylinder 11 from draft tube 8 is 15～25m/s.Since in little, the whirl cylinder of whirl cylinder 11 diameters 11 to cut the flow velocity degree higher, therefore higher separation efficiency is arranged, can will from flue gas, separate greater than 5 microns solid particulate matter.The internal diameter of draft tube 8 and gas outlet 9 is 10～20mm, and the degree of depth that gas outlet 9 inserts whirl cylinders 11 is 1～1.2 times of diameter of draft tube 8.Become specific inductive capacity formula capacity plate antenna sensor 14 and be the same parallel formation of smooth copper coin of two quality of long 28.5mm, high 20mm, polar plate spacing is 5mm.
Become specific inductive capacity formula capacity plate antenna sensor 14 and adopt the differential capacitance sensing technology; Because when surface area that becomes specific inductive capacity formula capacity plate antenna sensor 14 and polar plate spacing one timing; The size of its electric capacity is directly proportional with specific inductive capacity, promptly when dust gets into capacitive transducer 14, must cause that electric capacity changes, behind corresponding metering circuit and A/D converter (metering circuit plate 16); Can convert capacitance variations into change in voltage; Be linear change through dust quality and its specific inductive capacity within the specific limits, utilize the linear relationship calibration of Dust Capacity and its specific inductive capacity, thereby make output voltage directly indicate Dust Capacity.
Fig. 2 is to be example with the boiler fly ash, the magnitude of voltage of behind boiler fly ash entering capacity plate antenna sensor 4, being exported and the graph of a relation of Dust Capacity.
In the present embodiment, the extraction flow Q=10m of aspiration pump 10
3/ h in the leak detection process, can pass through flowmeter 7 bleeding regulating flow at any time; Dust concentration is greater than 30mg/m during leak-off pocket
3, greater than 5 microns dust granules concentration at least greater than 15mg/m
3, the Dust Capacity that falls into capacitive transducer is: m>=(10m
3/ h) * (15mg/m
3)=150mg/h.After 2 hours cycles of leak detection, the dust weight in the capacity plate antenna sensor is increased to more than the 300mg at the filter chamber of setting.For improving the lead that leak-off pocket is reported to the police, the Dust Capacity that setting capacity plate antenna sensor holds is 200mg.Can be known that by Fig. 2 its initial voltage value is not 0.46mv when having dust to get into the capacity plate antenna sensor, the alarm voltage value is 0.633mv.
To different dust, its specific inductive capacity is different, possibly cause its changes in capacitance different; So the alarm voltage value that causes changes; Therefore the utility model greatly reduces manual operation through setting automatic calibration function, has solved the leak detection of the sack cleaner that is used for different flue gases.
The main flow of the leak detection software that present embodiment adopts is as shown in Figure 3:
(1) host computer 19 starts;
(2) program initialization;
(3) show current state: show that all solenoid valves are closure state, show leak detection zero-time T0;
(4) set leak detection parameter and solenoid valve switching order: set the initial output voltage values U0 that becomes specific inductive capacity formula capacity plate antenna sensor 14; Become the alarm voltage value Ut of specific inductive capacity formula capacity plate antenna sensor 14; Set the leak detection cycle P of filter chamber 3; Deashing time T 1, leak detection time T 2, the leak detection cycle P=T1+T2 of filter chamber 3; Set each solenoid valve open and close order, set the numbering of each exhaust tube solenoid valve 1: Fj, j=1,2 ..., j ..., M; M is exhaust tube solenoid valve 1 sum, M=4～30, and exhaust tube solenoid valve 1 sum equals filter chamber quantity;
(5) open the leak detection button, aspiration pump 10 starts;
T=T0=0, deashing solenoid valve 18 is opened, and draft tube solenoid valve 6 closes, and first exhaust tube solenoid valve Fj opens, and j=1 gets into the 3 leak detection cycles of first filter chamber;
(6) host computer 19 shows the open and close state of timer state and solenoid valve;
If T＜T1, deashing continue to carry out; If T=T1, draft tube solenoid valve 6 is opened, and deashing solenoid valve 18 cuts out, and gets into the leak detection period T2 of first filter chamber 3;
If T=P=T1+T2, leak detection finishes, and the leak detection time makes zero, i.e. T=T0=0, and at this moment, deashing solenoid valve 18 is opened, and draft tube solenoid valve 6 closes, and the exhaust tube solenoid valve Fj of second filter chamber 3 opens, and j=2 gets into second 3 leak detection cycle of filter chamber;
Get into successively the 3rd, the 4th ..., the 3 leak detection cycles of a M filter chamber;
If j=M+1 makes j=1, then get into the 3 leak detection cycles of first filter chamber again, successively circulation;
Wherein, in 3 leak detection cycles, if become the output voltage U＜Ut of specific inductive capacity formula capacity plate antenna sensor 14, leak detection is proceeded at j filter chamber; If the output voltage U=Ut of capacity plate antenna sensor 14, host computer 19 shows that current exhaust tube solenoid valve Fj is a malfunction, shows that j filter chamber 3 has leak-off pocket, and host computer 19 is reported to the police, and aspiration pump 10 cuts out.After the leak-off pocket in j the filter chamber 3 was changed, leak detection system restarted.
The sack cleaner 2 of present embodiment has 5 filter chambers 3.Exhaust tube solenoid valve 1 of each filter chamber 3 corresponding installation; When detecting a certain filter chamber 3, these filter chamber 3 exhaust tube solenoid valves 1 are in opening, and the exhaust tube solenoid valve 1 of other each filter chamber 3 is in closed condition; The leak detection cycle carries out successively, and the leak detection cycle of each filter chamber 3 is 2 hours.
If all filter bags all do not have breakage in the sack cleaner 2, are clean through sack cleaner 2 purified gases, are can not see through filter bag for the dust granules greater than 5 microns, even there is fine dust to see through filter bag, its total mass concentration is less than 30mg/m
3Sub to eddy flow with aspiration pump 10 extraction sub-fractions by sack cleaner 2 purified gases, because the separation efficiency of eddy flow is lower than sack cleaner 2, the subparticle that sack cleaner 2 can not be removed, eddy flow can't be removed equally.So the gas that contains subparticle of extraction turns back in the main air blower 4 of sack cleaner through exhaust tube solenoid valve 1, draft tube solenoid valve 6, eddy flow, aspiration pump 10, backwind tube 5 again.Because the leak locator of present embodiment has utilized the main air blower 4 of sack cleaner 2, so reduced the power of aspiration pump 10 significantly.
If the filter bag in the sack cleaner 2 in certain filter chamber 3 has breakage, must there be a large amount of dust granules to see through filter bag greater than 5 microns, the dust mass concentration of flue gas will be much larger than 30mg/m
3, will effectively be separated by eddy flow greater than 5 microns dust granules.The dust of separating drops in action of gravity and becomes 14 li of specific inductive capacity formula capacitive transducers; Capacitive transducer 14 causes its electric capacity to change because of dust gets into; Behind corresponding metering circuit and A/D converter (metering circuit plate 16), can convert capacitance variations into change in voltage, through dust quality and its specific inductive capacity are linear change within the specific limits; Utilize the linear relationship calibration of Dust Capacity and its specific inductive capacity, thereby make output voltage directly indicate Dust Capacity.In 2 hours that set, will show that filter chamber 3 has filter bag damage above predefined magnitude of voltage by metering circuit plate 16 measured next magnitudes of voltage; The host computer 19 that is connected with metering circuit plate 16 will be reported to the police; Prompting has filter bag damage, and aspiration pump 10 cuts out, and changes bag.
The capacitance sensing type leak detector of bag-type dust remover that the utility model embodiment provides has the following advantages:
1, the utility model embodiment judges according to the appearance whether larger particles is arranged in the flue gas that emits whether sack cleaner 2 has the run-down phenomenon of filter bag.The a small amount of dusty gas that adopts eddy flow to extract out carries out gas solid separation, if the filter bag of sack cleaner 2 is run-down, the dust of larger particles must be arranged in the air-flow.Adopt eddy flow that the dust separation of larger particles is come out; Dust is fallen into become in the specific inductive capacity formula capacitive transducer, cause electric capacity to change, behind corresponding metering circuit and A/D converter; Can convert capacitance variations into change in voltage; Be linear change through dust quality and its specific inductive capacity within the specific limits, utilize the linear relationship calibration of Dust Capacity and its specific inductive capacity, thereby make output voltage directly indicate Dust Capacity.So do not have leak detection wrong report phenomenon, reliability height.
2, the utility model embodiment is connected with filter chamber 3 in the sack cleaner 2 through exhaust tube solenoid valve 1, and gas outlet 9 is connected with the inlet tube of backwind tube 5 with main air blower 4 through aspiration pump 10, so the energy consumption of the utility model is low, noise is little.
3, the utility model embodiment uses and becomes specific inductive capacity formula capacity plate antenna sensor 14, even hunt leak with the electric capacity method for sensing, so there is not the probe pollution problem; Use the capacitance sensing method to realize quantitatively and qualitative analysis in addition, and maintenance workload is little to dust.
The above; Be merely the embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any technician who belongs to the present technique field is in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of claim.
Claims (7)
1. capacitance sensing type leak detector of bag-type dust remover; It is characterized in that: comprise M the exhaust tube solenoid valve (1) corresponding, draft tube solenoid valve (6), eddy flow, aspiration pump (10), backwind tube (5), become specific inductive capacity formula capacity plate antenna sensor (14), metering circuit plate (16), deashing solenoid valve (18) and host computer (19) with the middle filter chamber (3) of sack cleaner (2); One end of M exhaust tube solenoid valve (1) respectively with sack cleaner (2) in the mutual UNICOM of corresponding filter chamber (3); The other end of M exhaust tube solenoid valve (1) is connected through the draft tube (8) of draft tube solenoid valve (6) with eddy flow; The gas outlet (9) of eddy flow is connected with the inlet tube of backwind tube (5) with the main air blower (4) of sack cleaner (2) through aspiration pump (10); The ash discharging pipe (13) of eddy flow is positioned at and becomes directly over the specific inductive capacity formula capacity plate antenna sensor (14); Becoming specific inductive capacity formula capacity plate antenna sensor (14) electrically connects with metering circuit plate (16); Between two pole plates of capacity plate antenna sensor (14), metering circuit plate (16), a M exhaust tube solenoid valve (1), draft tube solenoid valve (6) and deashing solenoid valve (18) electrically connect with host computer (19) respectively deashing solenoid valve (18) through piping erection.
2. capacitance sensing type leak detector of bag-type dust remover as claimed in claim 1 is characterized in that: become specific inductive capacity formula capacity plate antenna sensor (14) and be installed in the box body (15), the ash discharging pipe (13) and box body (15) sealed attachment of eddy flow.
3. capacitance sensing type leak detector of bag-type dust remover as claimed in claim 1; It is characterized in that: said eddy flow comprises draft tube (8), gas outlet (9), whirl cylinder (11), rotating flow cone (12) and ash discharging pipe (13); Whirl cylinder (11) is that internal diameter is the cylinder of 30～60mm; Draft tube (8) is fixedly mounted on the whirl cylinder (11); Gas outlet (9) is fixedly mounted on the top board center of whirl cylinder (11), and the upper end of rotating flow cone (12) is installed on the whirl cylinder (11), the lower port of rotating flow cone (12) and ash discharging pipe (13) sealed attachment.
4. capacitance sensing type leak detector of bag-type dust remover as claimed in claim 3 is characterized in that: the upper end of rotating flow cone (12) is positioned at 2/3～3/4 high place of whirl cylinder (11) cylindrical shell.
5. capacitance sensing type leak detector of bag-type dust remover as claimed in claim 3 is characterized in that: the internal diameter of draft tube (8) and gas outlet (9) is 10～20mm, and the degree of depth that gas outlet (9) inserts whirl cylinder (11) is 1～1.2 times of diameter of draft tube (8).
6. capacitance sensing type leak detector of bag-type dust remover as claimed in claim 1 is characterized in that: become the two piece copper coin parallel formations of specific inductive capacity formula capacity plate antenna sensor (14) into long 28.5mm, high 20mm, polar plate spacing is 5mm.
7. capacitance sensing type leak detector of bag-type dust remover as claimed in claim 1; It is characterized in that: metering circuit plate (16) is used for converting the capacitance variations that becomes specific inductive capacity formula capacity plate antenna sensor (14) into change in voltage that indication gets into the Dust Capacity that becomes specific inductive capacity formula capacity plate antenna sensor (14); And the magnitude of voltage after will changing is sent to host computer (19); When the magnitude of voltage of metering circuit plate (16) transmission surpassed predefined magnitude of voltage, host computer (19) prompting was reported to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203523671U CN202274972U (en) | 2011-09-20 | 2011-09-20 | Capacitance sensing type bag deduster leak detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203523671U CN202274972U (en) | 2011-09-20 | 2011-09-20 | Capacitance sensing type bag deduster leak detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202274972U true CN202274972U (en) | 2012-06-13 |
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ID=46195322
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203523671U Expired - Fee Related CN202274972U (en) | 2011-09-20 | 2011-09-20 | Capacitance sensing type bag deduster leak detector |
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| Country | Link |
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| CN (1) | CN202274972U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017983A (en) * | 2011-09-20 | 2013-04-03 | 武汉朗涤环保设备制造有限公司 | Capacitor sensing type bag-type dust collector leak detector |
-
2011
- 2011-09-20 CN CN2011203523671U patent/CN202274972U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017983A (en) * | 2011-09-20 | 2013-04-03 | 武汉朗涤环保设备制造有限公司 | Capacitor sensing type bag-type dust collector leak detector |
| CN103017983B (en) * | 2011-09-20 | 2015-01-28 | 武汉朗涤环保设备制造有限公司 | Capacitor sensing type bag-type dust collector leak detector |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20200920 |
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| CF01 | Termination of patent right due to non-payment of annual fee |