CN203006175U - Online monitoring device for monitoring combustible gas in secondary sealed cavity of external floating roof oil tank - Google Patents
Online monitoring device for monitoring combustible gas in secondary sealed cavity of external floating roof oil tank Download PDFInfo
- Publication number
- CN203006175U CN203006175U CN 201220614550 CN201220614550U CN203006175U CN 203006175 U CN203006175 U CN 203006175U CN 201220614550 CN201220614550 CN 201220614550 CN 201220614550 U CN201220614550 U CN 201220614550U CN 203006175 U CN203006175 U CN 203006175U
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- combustible gas
- floating roof
- secondary seal
- seal cavity
- external floating
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Abstract
The utility model discloses an online monitoring device for monitoring combustible gas in a secondary sealed cavity of an external floating roof oil tank. The online monitoring device comprises combustible gas probes, safety isolation modules and an alarm controller. The combustible gas probes are used for monitoring concentration of the combustible gas in the secondary sealed cavity in real time and converting concentration information into an electrical signal; each safety isolation module can be connected with a plurality of combustible gas probes to implement partitioned monitoring on the secondary sealed cavity, so that a leakage region can be more accurately positioned and convenience is provided for overhauling; a liquid crystal display screen, a buzzer and an indicating lamp are arranged inside the alarm controller; the liquid crystal display screen is used for displaying a real-time combustible gas concentration value monitored by each combustible gas probe in real time; and when the real-time concentration value monitored by a certain combustible gas probe exceeds a preset alarm value or the combustible gas probes go wrong, the buzzer and the indicating lamp timely send out sound and light alarm signals so as to accurately prompt the specific position of the leaked part and prompt monitoring personnel to pay attention.
Description
Technical field
The utility model relates to a kind of external floating roof tank secondary seal cavity fire gases on-Line Monitor Device.
Background technology
External floating roof tank, the most frequently used a kind of version at present domestic and international large oil tank, be mainly used in storing the media such as crude oil, gasoline and diesel oil, can reach with the hermetically-sealed construction between the unsteady and tank skin of oil product liquid level by floating plate and suppress the oil product volatilization, reduce environmental pollution, reduce the purpose of economic loss.Sealing effectiveness between floating plate and tank skin directly has influence on the effect that external floating roof tank suppresses the oil product volatilization.
Outer floating roof is followed the liquid storage level and is risen or descend, with respect to the space that there is no evaporation without the fixed roof tank of floating roof.In principle, this has just eliminated so-called " large breathing loss ".Evaporation has not only caused the loss on product quantity, also affected the quality of product, simultaneously polluted again environment, the inflammable medium in space and air mixture ratio reach certain limit and easily produce blast, and therefore uncovered cylindrical steel storage tank adds the measure that outer floating roof is necessity.Need between tank shell and outer floating roof floating plate to keep 100mm to the gap of 500mm so that guarantee in operational process not can chuck, use edge seal system to reduce the edge evaporation.
Similar and the inner floating roof of the version of outer floating roof has steel tray formula, buoyancy module formula, and individual layer or double deck form even have the outer floating roof of using the aluminum alloy sandwich construction.Normally movable telescopic being suspended in liquid of the adjustable brace of floating roof.
In prior art, the general secondary seal structure that adopts between floating plate and tank skin, by two-layer oil gas every film formed once sealing space and secondary seal space, generally can realize the sealing effectiveness of floating plate in the process that fluctuates with pasta, avoid oil gas to leak out from volatilizing between floating plate and tank skin.Yet in the process of using, in a single day failure conditions appears in the floating plate hermetically-sealed construction that is positioned at eminence, the characteristics that just have difficult discovery, difficult inspection, difficult location, and the hand inspection mode of the present periodic inspection maintenance of adopting is faced with long in time limit, the problems such as work capacity large, response lag, can not in time eliminate the situation that oil gas volatilization leaks, when finding leak case is arranged, often revealed for a long time, thereby caused huge pollution and waste.
The utility model content
The purpose of this utility model is to propose a kind of external floating roof tank secondary seal cavity fire gases on-Line Monitor Device, can effectively solve the technical matters that exists in prior art.
To achieve these goals, the technical scheme that adopts is:
external floating roof tank secondary seal cavity fire gases on-Line Monitor Device, the first seal diaphragm and the second seal diaphragm are set between floating roof floating plate and oil tank wall outside, the second seal diaphragm is positioned at above the first seal diaphragm, described the first seal diaphragm and oil tank wall, surround a secondary seal cavity between the second seal diaphragm, described external floating roof tank secondary seal cavity fire gases on-Line Monitor Device, comprise for Real-Time Monitoring secondary seal cavity inside combustable gas concentration and also this concentration information is converted to a plurality of combustible gas probes of electrical signal, for the safe isolation module that receives the transmission of described combustible gas probe electrical signal and change, be used for receiving safe isolation module transmitted signal and also in time make the alarm controller of response.
Further, described combustible gas probe is fixed on the second seal diaphragm by installing mechanism, comprises infrared combustible gas sensor and signal-processing board, and infrared combustible gas sensor stretches into the secondary seal cavity inside.
Adopt infrared combustible gas sensor, have a life-span long, can be not poisoning, the characteristics such as measurement range is wide have made up general catalytic combustion type fuel gas sensor application and the inferior position of the environment of explosive gas mixture occurred continuously or for a long time.
Further, described installing mechanism, comprise outer clamping disk(-sc) and interior clamping disk(-sc), offer axially extending bore on outer clamping disk(-sc), the sidepiece of clamping disk(-sc) offers the screw hole that is communicated with axially extending bore outside, be provided with the mounting hole suitable with outer clamping disk(-sc) on the second seal diaphragm, outside clamping disk(-sc) passes mounting hole and stretches into the secondary seal cavity inside and be fixed by described interior clamping disk(-sc); Described combustible gas probe is arranged on axially extending bore inside and is fixed by the holding screw that passes screw hole.
Further, the junction of described outer clamping disk(-sc) and interior clamping disk(-sc) is provided with seal gasket; Be provided with seal ring between outer clamping disk(-sc) and combustible gas probe.
Further, described electrical signal is current signal, and is converted to 485 signals through safe isolation module.
Further, described alarm controller, inside is provided with LCDs, buzzer phone and indicator lamp.
LCDs, be used for the real-time combustable gas concentration value that each combustible gas probe of demonstration monitors, when the real-time concentration value that monitors when certain combustible gas probe surpasses preset alarm value or combustible gas probe and breaks down, alarm controller in time sends the sound and light alarm signal, and indication place sends the particular location of the combustible gas probe of warning, and prompting the monitor staff note.
Further, described alarm controller is connected in series with several safe isolation modules by quad, and each safe isolation module is connected with a plurality of combustible gas probes by triple cable; Triple cable and quad all adopt shielded cable, and the core cross-sectional area is not less than 1mm
2
Further, described safe isolation module has several, and each safe isolation module connects a plurality of combustible gas probes by triple cable respectively; Be provided with signal hub between alarm controller and safe isolation module, all safe isolation modules are connected on signal hub by quad, are connected by quad between signal hub and alarm controller; Triple cable and quad all adopt shielded cable, and the core cross-sectional area is not less than 1mm
2
Further, described safe isolation module and signal hub all are arranged on flame proof joint box inside.
Further, described alarm controller operating voltage is the 220V alternating current, and the combustible gas probe operating voltage is the 24V direct current (DC).
The utility model has the advantages that:
the external floating roof tank secondary seal cavity fire gases on-Line Monitor Device that the utility model is addressed, can be by stretching into the infrared combustible gas sensor of secondary seal cavity inside, combustable gas concentration to the secondary seal cavity inside carries out Real-Time Monitoring, and be converted to the electrical signal that can be identified by signal-processing board, by safe isolation module, be delivered on alarm controller, and the LCDs of alarm controller, can the real-time combustable gas concentration value that each combustible gas probe monitors be shown in real time, and the real-time concentration value that monitors at certain combustible gas probe is when surpassing preset alarm value or combustible gas probe and breaking down, in time send the sound and light alarm signal by buzzer phone and indicator lamp, the particular location of the combustible gas probe of warning is sent in indication, thereby reach timely, accurately point out out the purpose of external floating roof tank leak case.
By safe isolation module, limit the energy of infrared combustible gas sensor, make it to satisfy the requirement that is applied in the environment that explosive gas mixture occurs continuously or for a long time; In addition, safe isolation module can be converted to the electrical signal of combustible gas probe transmission 485 signals, reduces length of arrangement wire, improves the economy of on-Line Monitor Device.
As advantageous embodiment of the present utility model, each safe isolation module can connect a plurality of combustible gas probes, realizes the subregion monitoring to the secondary seal cavity, can locate more accurately and reveal the zone, for maintenance facilitates; Simultaneously alarm controller is positioned at Control Room inside, can connect several safe isolation modules, monitoring when can realize a plurality of external floating roof tank.
Description of drawings
Fig. 1 is the structural representation of external floating roof tank secondary seal cavity fire gases on-Line Monitor Device in the utility model;
Fig. 2 is the mounting structure figure of combustible gas probe in Fig. 1;
Fig. 3 a is the field layout figure when in the utility model, external floating roof tank secondary seal cavity fire gases on-Line Monitor Device is applied in single external floating roof tank;
Fig. 3 b is a kind of field layout figure when in the utility model, external floating roof tank secondary seal cavity fire gases on-Line Monitor Device is applied in a plurality of external floating roof tank;
Fig. 3 c is the another kind of field layout figure when in the utility model, external floating roof tank secondary seal cavity fire gases on-Line Monitor Device is applied in a plurality of external floating roof tank.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and the specific embodiment:
In conjunction with Fig. 1, shown in Figure 2, external floating roof tank of the prior art, the general secondary seal structure that adopts between outer floating roof floating plate and oil tank wall, the first seal diaphragm 1 and the second seal diaphragm 3 namely are set between floating roof floating plate and oil tank wall outside, the second seal diaphragm is positioned at above the first seal diaphragm, surrounds a secondary seal cavity 18 between the first seal diaphragm and oil tank wall 4, the second seal diaphragm.
External floating roof tank secondary seal cavity fire gases on-Line Monitor Device comprises combustible gas probe 2, safe isolation module 13 and alarm controller 15.Combustible gas probe is used for Real-Time Monitoring secondary seal cavity inside combustable gas concentration and this concentration information is converted to electrical signal, and preferably, this electrical signal is 4～20mA current signal; Safe isolation module, be used for receiving the transmission of described combustible gas probe electrical signal, and this electrical signal is converted to 485 signals, preferably, each safe isolation module can connect a plurality of combustible gas probes, the subregion monitoring of realization to the secondary seal cavity can be located more accurately and reveal the zone, for maintenance is facilitated; Alarm controller, inside is provided with LCDs, buzzer phone and indicator lamp, be used for receiving safe isolation module transmitted signal and in time making response: LCDs, show in real time the real-time combustable gas concentration value that each combustible gas probe monitors, when the real-time concentration value that monitors when certain combustible gas probe surpasses preset alarm value or combustible gas probe and breaks down, alarm controller in time sends the sound and light alarm signal, and indication place sends the particular location of the combustible gas probe of warning, and prompting the monitor staff note.
Infrared combustible gas sensor utilizes the spectrum Intrinsic Gettering principle of gas, utilizes fire gases to realize measurement to combustable gas concentration to the infrared Absorption principle of specific wavelength section.
Preferably, installing mechanism, comprise outer clamping disk(-sc) 6 and interior clamping disk(-sc) 9, offer axially extending bore on outer clamping disk(-sc), the sidepiece of clamping disk(-sc) offers the screw hole that is communicated with axially extending bore outside, be provided with the mounting hole suitable with outer clamping disk(-sc) on the second seal diaphragm 3, outside clamping disk(-sc) 6 passes mounting hole and stretches into the secondary seal cavity inside and be fixed by interior clamping disk(-sc) 9; Combustible gas probe is arranged on axially extending bore inside and is fixed by the holding screw 7 that passes screw hole.The junction of outer clamping disk(-sc) and interior clamping disk(-sc) is provided with seal gasket 8; Be provided with seal ring 5 between outer clamping disk(-sc) 6 and combustible gas probe 2.
The alarm controller operating voltage is the 220V alternating current, and the combustible gas probe operating voltage is the 24V direct current (DC).
In Fig. 3 a, field layout when showing external floating roof tank secondary seal cavity fire gases on-Line Monitor Device and being applied in single external floating roof tank 10: by the zone, a plurality of combustible gas probes are installed on outer floating roof floating plate 11, each combustible gas probe is connected on safe isolation module 13 by a triple core cable 12 respectively, safe isolation module of each external floating roof tank configuration, safe isolation module is connected on the alarm controller 15 that is positioned at Control Room 16 by a quad line 14.
Combustable gas concentration in combustible gas probe Real-Time Monitoring secondary seal cavity, and the current signal that combustable gas concentration information converts 4～20mA to is sent to safe isolation module, safe isolation module will be positioned at the signal that a plurality of combustible gas probes on an external floating roof tank send and unify conversion, convert 485 signals to, and send to alarm controller by the quad line.Alarm controller is installed in Control Room, receive 485 signals that safe isolation module sends, and the real-time combustable gas concentration value that each combustible gas probe is detected is presented on LCDs, the real-time concentration value that detects when certain combustible gas probe surpasses preset alarm value or combustible gas probe when sending breakdown signal, send the sound and light alarm signal by buzzer phone and indicator lamp, and indicating the particular location of the combustible gas probe that sends warning, prompting the monitor staff note.
In Fig. 3 b, a kind of field layout when showing external floating roof tank secondary seal cavity fire gases on-Line Monitor Device and being applied in a plurality of external floating roof tank 10: when a plurality of external floating roof tank 10 is arranged, each external floating roof tank is equipped with respectively a safe isolation module 13, each safe isolation module is serially connected by quad line 14 and alarm controller 15, monitoring when can realize alarm controller to a plurality of external floating roof tank.
In Fig. 3 c, another kind of field layout when showing external floating roof tank secondary seal cavity fire gases on-Line Monitor Device and being applied in a plurality of external floating roof tank 10: the actual conditions when considering field application, wiring inconvenience may appear, or wiring distance restriction, a signal hub 17 is set between alarm controller 15 and safe isolation module 13 is installed on the scene, 13 of each safe isolation modes are connected on signal hub by a quad line 14, and signal hub 17 is connected on alarm controller 15 by a quad line 14.
Safe isolation module and signal hub all are placed in the flame proof joint box, and safe isolation module can be arranged on the instrument platform at external floating top tank top, and signal hub can be installed according to on-site actual situations, to guarantee comfort feature and the economy of field wiring.Triple core cable and quad line should adopt shielded cable, and the core cross-sectional area is not less than 1mm
2, to guarantee the reliability of signal transmission.
In the utility model, external floating roof tank is in case leak appearance, the combustable gas concentration of secondary seal cavity inside will rise, when concentration acquires a certain degree, alarm controller will send alerting signal, and then can be more in time, point out out leakage situation accurately, be beneficial to staff's maintenance.
Claims (10)
1. external floating roof tank secondary seal cavity fire gases on-Line Monitor Device, the first seal diaphragm and the second seal diaphragm are set between floating roof floating plate and oil tank wall outside, the second seal diaphragm is positioned at above the first seal diaphragm, described the first seal diaphragm and oil tank wall, surround a secondary seal cavity between the second seal diaphragm, it is characterized in that, described external floating roof tank secondary seal cavity fire gases on-Line Monitor Device, comprise for Real-Time Monitoring secondary seal cavity inside combustable gas concentration and also this concentration information is converted to a plurality of combustible gas probes of electrical signal, for the safe isolation module that receives the transmission of described combustible gas probe electrical signal and change, be used for receiving safe isolation module transmitted signal and also in time make the alarm controller of response.
2. external floating roof tank secondary seal cavity fire gases on-Line Monitor Device according to claim 1, it is characterized in that, described combustible gas probe, be fixed on the second seal diaphragm by installing mechanism, comprise infrared combustible gas sensor and signal-processing board, infrared combustible gas sensor stretches into the secondary seal cavity inside.
3. external floating roof tank secondary seal cavity fire gases on-Line Monitor Device according to claim 2, it is characterized in that, described installing mechanism, comprise outer clamping disk(-sc) and interior clamping disk(-sc), offer axially extending bore on outer clamping disk(-sc), the sidepiece of clamping disk(-sc) offers the screw hole that is communicated with axially extending bore outside, is provided with the mounting hole suitable with outer clamping disk(-sc) on the second seal diaphragm, and outside clamping disk(-sc) passes mounting hole and stretches into the secondary seal cavity inside and be fixed by described interior clamping disk(-sc); Described combustible gas probe is arranged on axially extending bore inside and is fixed by the holding screw that passes screw hole.
4. external floating roof tank secondary seal cavity fire gases on-Line Monitor Device according to claim 3, is characterized in that, the junction of described outer clamping disk(-sc) and interior clamping disk(-sc) is provided with seal gasket; Be provided with seal ring between outer clamping disk(-sc) and combustible gas probe.
5. external floating roof tank secondary seal cavity fire gases on-Line Monitor Device according to claim 1, is characterized in that, described electrical signal is current signal, and be converted to 485 signals through safe isolation module.
6. external floating roof tank secondary seal cavity fire gases on-Line Monitor Device according to claim 1, is characterized in that, described alarm controller, and inside is provided with LCDs, buzzer phone and indicator lamp.
7. external floating roof tank secondary seal cavity fire gases on-Line Monitor Device according to claim 1, it is characterized in that, described alarm controller, be connected in series several safe isolation modules by quad, each safe isolation module is connected with a plurality of combustible gas probes by triple cable; Triple cable and quad all adopt shielded cable, and the core cross-sectional area is not less than 1mm
2
8. external floating roof tank secondary seal cavity fire gases on-Line Monitor Device according to claim 1, is characterized in that, described safe isolation module has several, and each safe isolation module connects a plurality of combustible gas probes by triple cable respectively; Be provided with signal hub between alarm controller and safe isolation module, all safe isolation modules are connected on signal hub by quad, are connected by quad between signal hub and alarm controller; Triple cable and quad all adopt shielded cable, and the core cross-sectional area is not less than 1mm
2
9. external floating roof tank secondary seal cavity fire gases on-Line Monitor Device according to claim 8, is characterized in that, it is inner that described safe isolation module and signal hub all are arranged on the flame proof joint box.
10. external floating roof tank secondary seal cavity fire gases on-Line Monitor Device according to claim 1, is characterized in that, described alarm controller operating voltage is the 220V alternating current, and the combustible gas probe operating voltage is the 24V direct current (DC).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220614550 CN203006175U (en) | 2012-11-20 | 2012-11-20 | Online monitoring device for monitoring combustible gas in secondary sealed cavity of external floating roof oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220614550 CN203006175U (en) | 2012-11-20 | 2012-11-20 | Online monitoring device for monitoring combustible gas in secondary sealed cavity of external floating roof oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203006175U true CN203006175U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220614550 Expired - Fee Related CN203006175U (en) | 2012-11-20 | 2012-11-20 | Online monitoring device for monitoring combustible gas in secondary sealed cavity of external floating roof oil tank |
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| Country | Link |
|---|---|
| CN (1) | CN203006175U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482217A (en) * | 2014-11-04 | 2015-04-01 | 中国石油化工股份有限公司 | Self compensating type inflatable soft sealing method with remote control function |
| CN104792962A (en) * | 2015-03-19 | 2015-07-22 | 中国石油化工股份有限公司 | Wireless monitoring device for concentration of flammable gas inside sealing ring of outer floating roof storage tank |
| CN107215581A (en) * | 2016-03-22 | 2017-09-29 | 中国石油化工股份有限公司 | Totally enclosed type floating roof tank |
| CN111483712A (en) * | 2019-01-25 | 2020-08-04 | 中国石油天然气集团有限公司 | Sealing device for secondary sealing of outer floating roof storage tank and outer floating roof storage tank |
| CN112665793A (en) * | 2020-12-16 | 2021-04-16 | 浙江海洋大学 | Device for monitoring damage of central drain pipe of floating roof storage tank in real time |
-
2012
- 2012-11-20 CN CN 201220614550 patent/CN203006175U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482217A (en) * | 2014-11-04 | 2015-04-01 | 中国石油化工股份有限公司 | Self compensating type inflatable soft sealing method with remote control function |
| CN104792962A (en) * | 2015-03-19 | 2015-07-22 | 中国石油化工股份有限公司 | Wireless monitoring device for concentration of flammable gas inside sealing ring of outer floating roof storage tank |
| CN107215581A (en) * | 2016-03-22 | 2017-09-29 | 中国石油化工股份有限公司 | Totally enclosed type floating roof tank |
| CN111483712A (en) * | 2019-01-25 | 2020-08-04 | 中国石油天然气集团有限公司 | Sealing device for secondary sealing of outer floating roof storage tank and outer floating roof storage tank |
| CN111483712B (en) * | 2019-01-25 | 2022-03-01 | 中国石油天然气集团有限公司 | Sealing device for secondary sealing of outer floating roof storage tank and outer floating roof storage tank |
| CN112665793A (en) * | 2020-12-16 | 2021-04-16 | 浙江海洋大学 | Device for monitoring damage of central drain pipe of floating roof storage tank in real time |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20181120 |