CN203614137U - Intelligent gas transmission pipeline monitoring system - Google Patents

Intelligent gas transmission pipeline monitoring system Download PDF

Info

Publication number
CN203614137U
CN203614137U CN201320820156.5U CN201320820156U CN203614137U CN 203614137 U CN203614137 U CN 203614137U CN 201320820156 U CN201320820156 U CN 201320820156U CN 203614137 U CN203614137 U CN 203614137U
Authority
CN
China
Prior art keywords
sensor
microprocessor
extraction
module
monitoring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201320820156.5U
Other languages
Chinese (zh)
Inventor
李研
李寿山
徐伟杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANDONG ZHONGKE NANOTURE MATERIAL CO Ltd
Original Assignee
SHANDONG ZHONGKE NANOTURE MATERIAL CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANDONG ZHONGKE NANOTURE MATERIAL CO Ltd filed Critical SHANDONG ZHONGKE NANOTURE MATERIAL CO Ltd
Priority to CN201320820156.5U priority Critical patent/CN203614137U/en
Application granted granted Critical
Publication of CN203614137U publication Critical patent/CN203614137U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Examining Or Testing Airtightness (AREA)

Abstract

The utility model discloses an intelligent gas transmission pipeline monitoring system, and belongs to the gas monitoring technical field. The intelligent gas transmission pipeline monitoring system comprises three way pipelines (14) arranged in all mining areas, wherein the other two ends of each three way pipeline (14) are inserted into an extraction main pipeline (5), each two adjacent three way pipelines (14) are connected through a or a plurality of plastic pipelines (13), and the extraction main pipeline (5) extends to the ground and is connected with an extraction device on the ground. The intelligent gas transmission pipeline monitoring system is characterized in that a branch monitoring device is arranged in each branch pipeline, a main pipeline extraction device is arranged in the extraction main pipeline (5), and the branch monitoring devices and the main pipeline extraction device are simultaneously connected with a data transmission bus (4). The intelligent gas transmission pipeline monitoring system can monitor gas density in an underground mine gas extraction main pipeline and each branch pipeline of each mining area, and simultaneously can effectively and accurately judge a gas leakage position and achieve efficient and safe extraction.

Description

Intelligent gas conveyer tube monitoring system
Technical field
Intelligent gas conveyer tube monitoring system, belongs to gas-monitoring technical field.Be specifically related to a kind of feature with leak detection, leakproof, leak stopping, realize the intelligent gas conveyer tube monitoring system of highly effective and safe extraction.
Background technology
Difference in China due to the geological conditions in each colliery, gas bearing capacity dynamic change between 0.5%-80% of coal bed gas (gas).The amount difference of the gas being extracted into due to each face, so the gas that the branch line in each exploiting field is extracted into is pooled to after extraction main pipeline, concentration is in moment change procedure.Therefore, in the prior art, be positioned at Surveillance center on the ground and be difficult to monitor stable, gas density numerical value accurately, thereby the judgement to gas density and leakage situation cannot judge accurately, grasp, once gas leaks, can become larger potential safety hazard.In the prior art, the artificial mode of general employing judges the gas leakage situation of extraction pipeline, because extraction pipeline is general long and have a more lateral, so adopt the mode operating efficiency of artificial leak detection lower, waste a large amount of manpower and materials, cannot meet the requirement of location fast of gas leakage point simultaneously.
Summary of the invention
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, provide a kind of and carry out gas concentration monitoring in downhole coal mine gas pumping main pipeline and each exploiting field lateral, can judge effectively, accurately gas leakage place, realize intelligent gas conveyer tube monitoring system efficient, safe extraction simultaneously.
The utility model solves the technical scheme that its technical problem adopts: this intellectuality gas conveyer tube monitoring system, comprise that a port stretches into the triplate line as branch line in each exploiting field, in the other two ends access extraction main pipeline of triplate line, between adjacent two triplate lines, connected by one or more plastic piping, extraction main pipeline extends to ground and is connected with the extraction equipment on ground, it is characterized in that: in described branch line, be provided with branch road monitoring device, in described extraction main pipeline, be provided with main pipeline drainage device, branch road monitoring device, main pipeline drainage device is connected with data transmission bus simultaneously.
Described main pipeline drainage device comprises the extraction flow monitoring device that is arranged on extraction main pipeline entrance and exit place, is arranged on the multiple extraction purpose monitoring devices in extraction main pipeline.
Described branch road monitoring device comprises the methane transducer that is arranged on branch line entrance, each exploiting field, is arranged on the extraction flow monitoring device in branch line exit, exploiting field and is arranged on pipeline in the branch line monitoring system of dusting.
In the tunnel in described each exploiting field, be provided with environmental monitoring installation.
Described extraction flow monitoring device comprises: the first communication module, the first memory module, the first display module, first microprocessor, the first infrared remote control module, the first power transfer module and multiple acquisition sensor, acquisition sensor is connected with first microprocessor, first microprocessor is connected with the first display module with the first memory module, the first infrared remote control module is connected with first microprocessor with the first power transfer module, first microprocessor is connected with the first communication module, and the first communication module is connected with data transmission bus.
Described environmental monitoring installation comprises the second communication module, the second memory module, the second display module, the second microprocessor, the second infrared remote control module, second source modular converter, first sensor control module and environment monitoring sensor, environment monitoring sensor is connected with first sensor control module, first sensor control module is connected with the second microprocessor, the second microprocessor is connected with the second display module with the second memory module, the second infrared remote control module is connected with the second microprocessor with second source modular converter, the second microprocessor is connected with the second communication module, the second communication module is connected with data transmission bus.
Described environment monitoring sensor comprises: methane transducer, CO sensor, temperature pick up, SO 2sensor, H 2s sensor and ammonia gas sensor.
Described extraction purpose monitoring device comprises: the 3rd communication module, the 3rd memory module, the 3rd display module, the 3rd microprocessor, the 3rd infrared remote control module, the 3rd power transfer module, the second sensor control module and monitoring sensor, monitoring sensor is connected with the second sensor control module, the second sensor control module is connected with the 3rd microprocessor, the 3rd microprocessor is connected with the 3rd display module with the 3rd memory module, the 3rd infrared remote control module is connected with the 3rd microprocessor with the 3rd power transfer module, the 3rd microprocessor is connected with the 3rd communication module, the 3rd communication module is connected with data transmission bus.
Described monitoring sensor comprises methane transducer, CO sensor, temperature pick up, pressure sensor, flow transmitter and some methane optical fiber sensors, and methane optical fiber sensor is distributed in extraction main pipeline and extraction main pipeline and lateral junction.
Compared with prior art, had beneficial effect of the present utility model is: intelligent gas conveyer tube monitoring system of the present utility model, in downhole coal mine gas pumping main pipeline and each exploiting field lateral, carry out gas concentration monitoring, after there is gas leakage situation, the monitor value collecting by the firedamp sensor being arranged in extraction main pipeline and each exploiting field, the monitor value of adjacent two methane transducers is carried out to the calculating of concentration difference, compare with the difference threshold presetting simultaneously, thereby can be effective, the place of judgement gas leakage accurately, realize efficient, safe extraction, greatly shorten the time of leak detection, guarantee the safety of down-hole extraction.The data that simultaneously each sensor collected are stored, are uploaded, and have improved the operating efficiency of aboveground work simultaneously, and the intelligent degree of extraction is increased greatly.
Accompanying drawing explanation
Fig. 1 is intelligent gas conveyer tube monitoring system structural representation.
Fig. 2 is intelligent gas conveyer tube monitoring system extraction flow monitoring device functional-block diagram.
Fig. 3 is intelligent gas conveyer tube monitoring system environmental monitoring installation functional-block diagram.
Fig. 4 is intelligent gas conveyer tube monitoring system extraction purpose monitoring principle of device block diagram.
Wherein: 1, dust monitoring system 11, methane transducer 12, extraction flow monitoring device 13, plastic piping 14, triplate line of the first exploiting field 2, the second exploiting field 3, N exploiting field 4, data transmission bus 5, extraction main pipeline 6, extraction purpose monitoring device 7, spark arrester 8, environmental monitoring installation 9, air-leakage preventing device 10, pipeline.
The specific embodiment
Fig. 1 ~ 4th, most preferred embodiment of the present utility model, is described further below in conjunction with 1 ~ 4 pair of the utility model of accompanying drawing:
As shown in Figure 1, in underground mine, be distributed with multiple exploiting fields: the first exploiting field 1, the second exploiting field 2 ... N exploiting field 3, the equal correspondence in each exploiting field is provided with a metal triplate line 14, a port of triplate line 14 stretches into the branch line as this exploiting field extraction in exploiting field, in another two ports access of triplate line 14 extraction main pipeline 5, multiple adjacent triplate lines 14 and some plastic pipings 13 that each triplate line 14 is connected connect to form extraction main pipeline 5.Extraction main pipeline 5 extends to ground, carries out extraction by the drainage device (not shown in FIG.) that is arranged on ground, under the effect of drainage device, and the interior formation negative pressure of extraction main pipeline 5, the power of formation extraction main pipeline 5 interior Gas Flow.
Between the triplate line 14 in adjacent two exploiting fields, connect by plastic piping 13, when adjacent two exploiting fields are when distant, between two corresponding triplate lines 14, need to connect the connection that realize extraction main line 5 by many plastic pipings 13 head and the tail.In the time that many plastic pipings of needs 13 are used in combination, between two adjacent plastic pipings 13, be connected by air-leakage preventing device 9, open in the patent that air-leakage preventing device 9 has been 201020105215.7 by the applicant in the patent No..
Entrance in the lateral in each exploiting field is provided with methane transducer 11, exit (being branch line and extraction main line 5 interfaces) is provided with extraction flow monitoring device 12, in branch line, be provided with the pipeline monitoring system 10 of dusting, dust monitoring system 10, methane transducer 11 and extraction flow monitoring device 12 of pipeline is all connected with data transmission bus 4 simultaneously.Methane transducer 11 is for the concentration of the methane of entrance in this lateral is gathered, and the data that collect are uploaded by data transmission bus 4; Extraction flow-monitoring device 12 is monitored for the concentration of the flow in this lateral and all kinds of gases, and the data that collect are uploaded by data transmission bus 4.The dust signal input part of monitoring system 10 of pipeline is connected with the ultraviolet flame sensor, infrared rays flame sensor, temperature pick up and the detonation pressure sensor (all not drawing in figure) that are arranged in lateral, when in lateral when breaking out of fire, the sensor that pipeline dusts in monitoring system 10 is rapidly by data upload, dust simultaneously, when warning, fire is controlled.The dust signal output part of monitoring system 10 of pipeline is connected with data transmission bus 4, and the data that the each sensor being attached thereto is collected are uploaded by data transmission bus 4.Be provided with some extraction purpose monitoring devices 6 extraction main pipeline 5 is interior simultaneously, extraction purpose monitoring device 6 is with the main distinction of extraction flow monitoring device 12, the sensor setting of extraction flow monitoring device 12 is comparatively fixing, mainly comprise methane transducer, CO sensor, temperature pick up, pressure sensor and flow meter, the number of sensors that extraction purpose monitoring device 6 is controlled is more and unfixing, autgmentability is stronger simultaneously, can or set up different sensors according to the replacing of actual environment.In the tunnel of mine, be provided with some environmental monitoring installations 8, in order to the ambient concentration in the outer tunnel of extraction pipeline is monitored simultaneously.At every interior spark arrester 7 that is provided with of extraction main line 5 simultaneously.
As shown in Figure 2, extraction flow monitoring device 12 comprises: the first communication module, the first memory module, the first display module, first microprocessor, the first infrared remote control module, the first power transfer module and all kinds of acquisition sensor.All kinds of acquisition sensors are connected with first microprocessor, and the signal detecting is delivered to first microprocessor.First microprocessor is connected with the first display module with the first memory module, the sensor signal receiving is stored and shown, the first infrared remote control module is connected with first microprocessor with the first power transfer module, respectively first microprocessor is powered and infrared control; First microprocessor is connected with the first communication module, and the first communication module is connected with data transmission bus 4, and the signal all kinds of acquisition sensors being detected by the first communication module and data transmission bus 4 is uploaded.Above-mentioned all kinds of acquisition sensors comprise: methane transducer, CO sensor, temperature pick up, pressure sensor, flow meter, need to coordinate flow module to use in use traffic timing.
As shown in Figure 3, environmental monitoring installation 8 comprises the second communication module, the second memory module, the second display module, the second microprocessor, the second infrared remote control module, second source modular converter, first sensor control module and environment monitoring sensor.Environment monitoring sensor is connected with first sensor control module, and first sensor control module is connected with the second microprocessor, and the signal receiving is delivered to the second microprocessor.The second microprocessor is connected with the second display module with the second memory module, the sensor signal receiving is stored and shown, the second infrared remote control module is connected with the second microprocessor with second source modular converter, respectively the second microprocessor is powered and infrared control; The second microprocessor is connected with the second communication module, and the second communication module is connected with data transmission bus 4, and the signal all kinds of acquisition sensors being detected by the second communication module and data transmission bus 4 is uploaded.Above-mentioned environment monitoring sensor comprises: methane transducer, CO sensor, temperature pick up, SO 2sensor, H 2s sensor and ammonia gas sensor, environmental monitoring installation 8 is monitored for the concentration of all kinds of gases in tunnel.
As shown in Figure 4, the functional-block diagram of extraction purpose monitoring device 6 is identical with environmental monitoring installation functional-block diagram, comprises the 3rd communication module, the 3rd memory module, the 3rd display module, the 3rd microprocessor, the 3rd infrared remote control module, the 3rd power transfer module, the second sensor control module and monitoring sensor.Monitoring sensor is connected with the second sensor control module, and the second sensor control module is connected with the 3rd microprocessor, and the signal receiving is delivered to the 3rd microprocessor.The 3rd microprocessor is connected with the 3rd display module with the 3rd memory module, the sensor signal receiving is stored and shown, the 3rd infrared remote control module is connected with the 3rd microprocessor with the 3rd power transfer module, respectively the 3rd microprocessor is powered and infrared control; The 3rd microprocessor is connected with the 3rd communication module, and the 3rd communication module is connected with data transmission bus 4, and the signal all kinds of acquisition sensors being detected by the 3rd communication module and data transmission bus 4 is uploaded.The monitoring sensor of extraction purpose monitoring device 6 comprises: methane transducer, CO sensor, temperature pick up, pressure sensor, flow transmitter and some methane optical fiber sensors.The methane optical fiber sensor that extraction purpose monitoring device 6 connects is distributed in extraction main pipeline 5 and extraction main pipeline 5 and lateral junction, methane dynamic data in extraction main pipeline 5 is monitored, and the data analysis of each Fibre Optical Sensor being uploaded by extraction purpose monitoring device 6, realize the intelligence of extraction main pipeline 5, efficiently leak detection.
Specific works process and operating principle are as follows: intelligent gas conveyer tube monitoring system of the present utility model is in the time monitoring, methane optical fiber sensor is monitored the methane concentration in extraction main pipeline 5, and the concentration value monitoring is uploaded on corresponding extraction purpose monitoring device 6, the real-time concentration value that extraction purpose monitoring device 6 is uploaded according to the each methane optical fiber sensor receiving, the methane concentration value that adjacent two methane optical fiber sensors are collected is carried out difference comparison successively, and the difference calculating is carried out to record, then extraction purpose monitoring device 6 compares the multiple differences that calculate successively with predefined concentration difference threshold value, and judge whether all differences meet or exceed predefined concentration difference threshold value, if met or exceeded predefined concentration difference threshold value, can judge 11 the interior gas leakages that occur of corresponding extraction main pipeline 5 of adjacent two methane transducer that occur this difference.Extraction purpose monitoring device 6 is uploaded to related data in ground control computer and reports to the police, after the staff on ground sees the alarm signal of uploading in underground mine, notice underground activities personnel manually hunt leak, process to the leakage section of extraction main pipeline 5, completes leak stopping.
The above, it is only preferred embodiment of the present utility model, be not the restriction of the utility model being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present utility model, still belong to the protection domain of technical solutions of the utility model.

Claims (9)

1. intelligent gas conveyer tube monitoring system, comprise that a port stretches into the triplate line as branch line (14) in each exploiting field, in the other two ends access extraction main pipelines (5) of triplate line (14), between adjacent two triplate lines (14), connected by one or more plastic piping (13), extraction main pipeline (5) extends to ground and is connected with the extraction equipment on ground, it is characterized in that: in described branch line, be provided with branch road monitoring device, in described extraction main pipeline (5), be provided with main pipeline drainage device, branch road monitoring device, main pipeline drainage device is connected with data transmission bus (4) simultaneously.
2. intelligent gas conveyer tube monitoring system according to claim 1, it is characterized in that: described main pipeline drainage device comprises the extraction flow monitoring device (12) that is arranged on extraction main pipeline (5) entrance and exit place, be arranged on the multiple extraction purpose monitoring devices (6) in extraction main pipeline (5).
3. intelligent gas conveyer tube monitoring system according to claim 1, it is characterized in that: described branch road monitoring device comprises the methane transducer (11) that is arranged on branch line entrance, each exploiting field, be arranged on the extraction flow monitoring device (12) in branch line exit, exploiting field and be arranged on pipeline in the branch line monitoring system (10) of dusting.
4. intelligent gas conveyer tube monitoring system according to claim 1, is characterized in that: in the tunnel in described each exploiting field, be provided with environmental monitoring installation (8).
5. according to the intelligent gas conveyer tube monitoring system described in claim 2 or 3, it is characterized in that: described extraction flow monitoring device (12) comprising: the first communication module, the first memory module, the first display module, first microprocessor, the first infrared remote control module, the first power transfer module and multiple acquisition sensor, acquisition sensor is connected with first microprocessor, first microprocessor is connected with the first display module with the first memory module, the first infrared remote control module is connected with first microprocessor with the first power transfer module, first microprocessor is connected with the first communication module, the first communication module is connected with data transmission bus (4).
6. intelligent gas conveyer tube monitoring system according to claim 4, it is characterized in that: described environmental monitoring installation (8) comprises the second communication module, the second memory module, the second display module, the second microprocessor, the second infrared remote control module, second source modular converter, first sensor control module and environment monitoring sensor, environment monitoring sensor is connected with first sensor control module, first sensor control module is connected with the second microprocessor, the second microprocessor is connected with the second display module with the second memory module, the second infrared remote control module is connected with the second microprocessor with second source modular converter, the second microprocessor is connected with the second communication module, the second communication module is connected with data transmission bus (4).
7. intelligent gas conveyer tube monitoring system according to claim 6, is characterized in that: described environment monitoring sensor comprises: methane transducer, CO sensor, temperature pick up, SO 2sensor, H 2s sensor and ammonia gas sensor.
8. intelligent gas conveyer tube monitoring system according to claim 2, it is characterized in that: described extraction purpose monitoring device (6) comprising: the 3rd communication module, the 3rd memory module, the 3rd display module, the 3rd microprocessor, the 3rd infrared remote control module, the 3rd power transfer module, the second sensor control module and monitoring sensor, monitoring sensor is connected with the second sensor control module, the second sensor control module is connected with the 3rd microprocessor, the 3rd microprocessor is connected with the 3rd display module with the 3rd memory module, the 3rd infrared remote control module is connected with the 3rd microprocessor with the 3rd power transfer module, the 3rd microprocessor is connected with the 3rd communication module, the 3rd communication module is connected with data transmission bus (4).
9. intelligent gas conveyer tube monitoring system according to claim 8, it is characterized in that: described monitoring sensor comprises methane transducer, CO sensor, temperature pick up, pressure sensor, flow transmitter and some methane optical fiber sensors, methane optical fiber sensor is distributed in extraction main pipeline (5) and extraction main pipeline (5) and lateral junction.
CN201320820156.5U 2013-12-14 2013-12-14 Intelligent gas transmission pipeline monitoring system Expired - Fee Related CN203614137U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320820156.5U CN203614137U (en) 2013-12-14 2013-12-14 Intelligent gas transmission pipeline monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320820156.5U CN203614137U (en) 2013-12-14 2013-12-14 Intelligent gas transmission pipeline monitoring system

Publications (1)

Publication Number Publication Date
CN203614137U true CN203614137U (en) 2014-05-28

Family

ID=50766788

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320820156.5U Expired - Fee Related CN203614137U (en) 2013-12-14 2013-12-14 Intelligent gas transmission pipeline monitoring system

Country Status (1)

Country Link
CN (1) CN203614137U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103628922A (en) * 2013-12-14 2014-03-12 山东中科纳米管材有限公司 Intelligent gas transmission pipeline monitoring system and monitoring method
CN110185936A (en) * 2019-06-28 2019-08-30 湖南中建管廊运营有限公司 A kind of gas transmission pipeline detection device
CN112817253A (en) * 2020-12-31 2021-05-18 重庆占峰科技有限公司 Gas drainage comprehensive parameter tester
CN113309558A (en) * 2021-06-11 2021-08-27 北京掌上通网络技术股份有限公司 Grouping metering monitoring system and monitoring method for mine gas extraction

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103628922A (en) * 2013-12-14 2014-03-12 山东中科纳米管材有限公司 Intelligent gas transmission pipeline monitoring system and monitoring method
CN103628922B (en) * 2013-12-14 2015-04-01 山东中科纳米管材有限公司 Intelligent gas transmission pipeline monitoring system and monitoring method
CN110185936A (en) * 2019-06-28 2019-08-30 湖南中建管廊运营有限公司 A kind of gas transmission pipeline detection device
CN112817253A (en) * 2020-12-31 2021-05-18 重庆占峰科技有限公司 Gas drainage comprehensive parameter tester
CN113309558A (en) * 2021-06-11 2021-08-27 北京掌上通网络技术股份有限公司 Grouping metering monitoring system and monitoring method for mine gas extraction

Similar Documents

Publication Publication Date Title
CN103628922B (en) Intelligent gas transmission pipeline monitoring system and monitoring method
CN104088669B (en) Coal mine gob coal spontaneous combustion monitor and early warning system
CN203614137U (en) Intelligent gas transmission pipeline monitoring system
CN102230375A (en) Method and device for monitoring coal bed gas parameter in real time
CN206095313U (en) Centralized water supply pipe network integrated monitoring simulates analytic system
CN206877112U (en) A kind of underground pipe gallery monitoring and operation managing system
CN103899357A (en) System and method for real-time visual monitoring and early warning of mine floor water disasters
CN103927834B (en) Underground utilities circumference invades and harasses early warning system
CN203149775U (en) Real-time monitoring and early-warning system based on sensing detection and video detection for debris flow
CN202771245U (en) Natural gas wellhead data acquisition and remote transmission system
CN102644848B (en) Transmission pipeline capable of monitoring leakage
CN206111244U (en) Gaseous real -time supervision device of conflagration landmark in mining collecting space area in pit
CN203571437U (en) Intelligent pipeline safety monitoring and early warning system
CN203809053U (en) Novel mine water disaster monitoring and early warning system
CN204677235U (en) A kind of intelligent all downhole safety warning device
CN102705012A (en) Monitoring system of coal roadway roof separation based on M-BUS
CN110185936A (en) A kind of gas transmission pipeline detection device
CN105114815A (en) Monitoring early-warning system for underground oil and gas pipeline
CN206555718U (en) A kind of novel pipeline leakage warning device
CN204327074U (en) Shale gas ground open flow safety monitoring assembly
CN206002242U (en) A kind of petroleum transportation pipeline pressure monitoring system
CN204552808U (en) Mine gas drainage pipeline optic-fiber monitoring system
CN203797356U (en) Oil pipeline leakage monitoring device
CN109268073B (en) Mining gas measurement safety monitoring system
CN205909006U (en) City utility tunnel pipeline automatic monitoring system that bursts

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: 20140528

Termination date: 20171214