CN203604997U - Buried gas pipeline leakage monitoring and alarming system - Google Patents
Buried gas pipeline leakage monitoring and alarming system Download PDFInfo
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- CN203604997U CN203604997U CN201320803164.9U CN201320803164U CN203604997U CN 203604997 U CN203604997 U CN 203604997U CN 201320803164 U CN201320803164 U CN 201320803164U CN 203604997 U CN203604997 U CN 203604997U
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Abstract
The utility model relates to a buried gas pipeline leakage monitoring and alarming system which comprises a gas monitoring pipe permeating gas selectively, a first gas monitoring instrument, a second gas monitoring instrument, a first vacuum pump, a second vacuum pump, a flow meter, a first control valve and a second control valve. One end of the gas monitoring pipe is connected with the first gas monitoring instrument through a pipeline and then is divided into two branches at a branching point, the first vacuum pump and the first control valve are arranged on the two branches respectively, the other end of the gas monitoring pipe is connected with the second gas monitoring instrument through a pipeline and then is divided into two branches at a branching point, the second vacuum pump and the second control valve are arranged on the two branches respectively, and the flow meter is arranged between the two branching points at the two ends of the gas monitoring pipe. The buried gas pipeline leakage monitoring and alarming system is matched with a corresponding method and can continuously monitor buried gas pipelines in a city on line in real time, leaking conditions of the gas pipelines can be timely found and leaking points can be accurately positioned.
Description
Technical field
The utility model relates to and is a kind ofly embedded in underground gas pipeline for Real-Time Monitoring and whether gas leakage occurs and determine the buried fuel gas pipeline leakage monitor and alarm system of leakage point.
Background technique
Along with deepening continuously of China's reform and optimizing and revising of energy resource structure, clean and effective sustainable use energy proportion in structure is more and more higher.Combustion gas is as one of energy of clean and effective, demand cumulative year after year.For meeting the city air feed market demand, urban pipeline construction department has accelerated pipe-line construction paces, therefore, length of pipeline rapid growth, pipe network swept area expands gradually.Along with the growth of duct length and the increase of the operation time limit, because the reasons such as burn into external force mechanical deterioration, tubing defect cause the frequency of Urban Buried Gas Pipeline leakage accident to increase.Therefore, the research of Urban Buried Gas Pipeline leakage monitoring alarm system is significant.
At present, the domestic typical patent of invention relevant to Urban Pipeline Carrying Natural Gas monitoring technology, as publication number is: the utility model patent " a kind of urban underground gas ductwork automatic monitoring and alarming system " of 201672262U, this patent Introduction the control system part of underground gas ductwork early warning system, control system can not directly be monitored gas pipeline, need to be equipped with monitoring equipment and just can reach monitoring object; The patent of invention that is 102201149A for another publication number " centralized domestic gas leakage monitoring alarming device ", this patent is carried out leakage situation warning for family's gas user, is not suitable for the monitoring of City Buried Gas Network.
As can be seen here, in prior art, do not have a kind of system of carrying out Real-Time Monitoring for buried gas pipeline.
Summary of the invention
The purpose of this utility model be to provide a kind of to Urban Buried Gas Pipeline carry out in real time, online, monitoring continuously, can realize the buried fuel gas pipeline leakage monitor and alarm system of the accurate location of timely discovery to fuel gas pipeline leakage situation and leakage point.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of buried fuel gas pipeline leakage monitor and alarm system, it comprises correspondence and parallel laid in gas pipeline top to be monitored and gas monitoring pipe, the first gas monitoring instrument, the second gas monitoring instrument, the first vacuum pump, the second vacuum pump, flowmeter, the first control valve and the second control valve that can selectively penetrating combustion gas;
One end of described gas monitoring pipe is divided into two-way branch road at a point branch point after connecting the first described gas monitoring instrument by pipeline, and the first described vacuum pump and the first described control valve are arranged at respectively on the branch road described in two-way;
The other end of described gas monitoring pipe is divided into two-way branch road at a point branch point after connecting the second described gas monitoring instrument by pipeline, and the second described vacuum pump and the second described control valve are arranged at respectively on the branch road described in two-way;
Described flowmeter is arranged between two points of branch points at described gas monitoring pipe two ends;
The described gas monitoring instrument that is arranged at the described control valve of the described arbitrary end of gas monitoring pipe and is arranged at the described relative the other end of gas monitoring pipe and vacuum pump are connected successively and are formed gas leakage and judge system by described pipeline, described branch road and described gas monitoring pipe; Control valve described in vacuum pump described in gas monitoring instrument described in two, two, described flowmeter, two is connected and forms gas leakage point positioning system with described gas monitoring pipe by described pipeline, described branch road.
Preferably, it also comprises PLC control gear, and described PLC control gear connects with signal with the first described gas monitoring instrument, the second described gas monitoring instrument, the first described vacuum pump, the second described vacuum pump, described flowmeter, the first described control valve, the second described control valve respectively.
Preferably, described gas monitoring pipe comprises and forms the structure of molecule film with selectively penetrating function of tubulose and the internal layer support bushing by the structure of molecule film described in inner support.
Preferably, on the described branch road that is provided with the first described vacuum pump and described the second vacuum pump at described gas monitoring pipe two ends, be also respectively arranged with gas concentration unit.
Due to technique scheme use, the utility model compared with prior art has following advantages: buried fuel gas pipeline leakage monitor and alarm system of the present utility model coordinate corresponding method can carry out in real time Urban Buried Gas Pipeline, online, continuously monitoring; It can realize timely discovery to fuel gas pipeline leakage situation and the accurate location of leakage point; It can use under complex environment, does not affect monitoring accuracy, can provide safe operation guarantee to city gas pipeline operation, meets the needs of Urban Buried Gas Pipeline monitoring.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram of buried fuel gas pipeline leakage monitor and alarm system of the present utility model.
Accompanying drawing 2 is the process flow diagram of buried fuel gas pipeline leakage monitor and alarm system of the present utility model.
In above accompanying drawing: 1, the first vacuum pump; 2, the first gas monitoring instrument; 3, gas monitoring pipe; 4, the second gas monitoring instrument; 5, flowmeter; 6, the second vacuum pump; 7, gas concentration unit; 8, the first control valve; 9, PLC control gear; 10, the second control valve.
Embodiment
Below in conjunction with embodiment shown in the drawings, the utility model is further described.
Embodiment one: shown in accompanying drawing 1.A kind of buried fuel gas pipeline leakage monitor and alarm system, it comprises correspondence and parallel laid in gas pipeline top to be monitored and gas monitoring pipe 3, the first gas monitoring instrument 2, the second gas monitoring instrument 4, the first vacuum pump 1, the second vacuum pump 6, flowmeter 5, the first control valve 8 and the second control valve 10 that can selectively penetrating combustion gas.The first control valve 8 and the second control valve 10 are electro motion control valve.Press the left and right directions in accompanying drawing 1, the two ends of definition gas monitoring pipe 3 are respectively its left end and right-hand member, to facilitate subsequent descriptions.
The left end of gas monitoring pipe 3 is divided into two-way branch road at a point branch point after connecting the first gas monitoring instrument 2 by pipeline, and the first vacuum pump 1 and the first control valve 8 are arranged at respectively on two-way branch road.On the branch road that the first vacuum pump 1 is set, be also provided with gas concentration unit 7, gas concentration unit 7 is positioned at the exhaust end of the first vacuum pump 1.Branch road after gas concentration unit 7 or the first control valve 8 with air communication.
The right-hand member of gas monitoring pipe 3 is divided into two-way branch road at a point branch point after connecting the second gas monitoring instrument 4 by pipeline, and the second vacuum pump 6 and the second control valve 10 are arranged at respectively on two-way branch road.On the branch road that the second vacuum pump 6 is set, be also provided with gas concentration unit 7, gas concentration unit 7 is positioned at the exhaust end of the second vacuum pump 6.Branch road after gas concentration unit 7 or the second control valve 10 with air communication.
The first gas monitoring instrument 2, the second gas monitoring instrument 4, the first vacuum pump 1, the second vacuum pump 6, flowmeter 5, the first control valve 8, the second control valve 10 also connect with signal with a PLC control gear 9 respectively.PLC control gear 9 is for controlling the first vacuum pump 1, the second vacuum pump 6, the first control valve 8, the second control valve 10, and receives the alarm signal that the first gas monitoring instrument 2, the second gas monitoring instrument 4 send, the reading that obtains flowmeter 5.
Above in each constituent element, the gas monitoring instrument that is arranged at the control valve of gas monitoring pipe 3 arbitrary ends and is arranged at the gas monitoring pipe 3 relative the other ends and vacuum pump are connected successively and are formed gas leakage and judge system by pipeline, branch road and gas monitoring pipe 3; Two gas monitoring instrument, two vacuum pumps, flowmeter 5, two control valves are connected and are formed gas leakage point positioning system by pipeline, branch road and gas monitoring pipe 3.
The method that above-mentioned buried fuel gas pipeline leakage monitor and alarm system adopts comprises gas leakage determination methods and gas leakage independent positioning method two aspects, as shown in Figure 2.
Gas leakage determination methods is undertaken by a set of gas leakage judgement system arbitrarily.In the present embodiment, this gas leakage determination methods is: first started the first vacuum pump 1 and closed the first control valve 8 by the control of PLC control gear 9, open the second control valve 10 and close the second vacuum pump 6.Now, under the air-extraction function of the first vacuum pump 1, form negative pressure in pipeline, air forms the air-flow of forward flow through the second control valve 10, the second gas monitoring instrument 4, gas monitoring pipe 3, the first gas monitoring instrument 2 and the first vacuum pump 1.If while there is gas leakage in the somewhere of fuel tube to be monitored, forward flow thereupon after corresponding being penetrated into of combustion gas of leaking mixes in gas monitoring pipe 3 and with air, when the combustion gas of leaking is during with air motion to the first gas monitoring instrument 2, the first gas monitoring instrument 2 monitors combustion gas and sends alarm signal and transfer to PLC control gear 9, is the known gas leakage that occurred thus.Otherwise if without gas leakage, the first gas monitoring instrument 2 five alarm signals are sent.
If desired further determine the position that gas leakage occurs, need to be by the additional gas leakage independent positioning method of gas leakage point positioning system on the basis of gas leakage determination methods.
Gas leakage independent positioning method is: when monitor the arbitrary moment occurring after gas leakage by the first gas monitoring instrument 2, close the first vacuum pump 1 simultaneously and start the second vacuum pump 6, unlatching the first control valve 8 and close the second control valve 10 by PLC control gear 9, and using this moment as time zero T
1.Now, under the air-extraction function of the second vacuum pump 6, air through the first control valve 8, the first gas monitoring instrument 2 and with the combustion gas mixing of leaking after, then form the air-flow of reverse flow through gas monitoring pipe 3, the second gas monitoring instrument 4, the second vacuum pump 6.In the time that the combustion gas of leaking arrives the second gas monitoring instrument 4, it sends alarm signal, and the moment that the second gas monitoring instrument 4 is detected to combustion gas and sends alarm signal is as timing end point T
2.PLC control gear 9 is according to time zero T
1with timing end point T
2obtain time difference Δ T, the combustion gas that this Δ T is leakage flowed to for the second required time of gas monitoring instrument 4 by the position in gas monitoring pipe 3 corresponding to leakage point.Above-mentioned by time zero T
1to timing end point T
2process in, the flow that gathers the air-flow of reverse flow by flowmeter 5 is converted into its flow velocity V by PLC control gear 9, PLC control gear 9 is according to the flow velocity V of the air-flow of this reverse flow and time difference Δ T and calculate the distance of the combustion gas reverse flow of leakage by formula Δ S=V* Δ T, and the distance of the combustion gas reverse flow of this leakage is the distance between gas leakage point and the second gas monitoring instrument 4.Then the distance, delta S between PLC control gear 9 these gas leakage points of recycling and the second gas monitoring instrument 4 deducts the distance S between right-hand member and the second gas monitoring instrument 4 of gas monitoring pipe 3
1(this is apart from S
1buried fuel gas pipeline leakage monitor and alarm system is set is known), can obtain the distance S=Δ S-S between gas leakage point and the right-hand member of gas monitoring pipe 3
1thereby, the position of definite gas leakage point.
In the working procedure of this system, gas concentration unit 7 can reclaim the gas in the mixed gas of combustion gas and air, guarantees that the gas of discharge is pollution-free to atmosphere.
This buried fuel gas pipeline leakage monitor and alarm system is the application aspect gas pipeline monitoring of the buried fuel gas pipeline leakage monitor and alarm system in city based on monitoring pipe; The gas concentration unit 7 of its outfit can play the effect of protection of the environment; And this system adopts the monitoring theory of gas leakage monitoring and leak point positioning stepwise development, improve positioning precision, shorten the response time; Its improved system that can also be equipped with solar energy electroplax and long distance wireless transmitting module can solve a difficult problem for desert gas pipeline monitoring.
Above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (4)
1. a buried fuel gas pipeline leakage monitor and alarm system, is characterized in that: it comprises correspondence and parallel laid in gas pipeline top to be monitored and gas monitoring pipe, the first gas monitoring instrument, the second gas monitoring instrument, the first vacuum pump, the second vacuum pump, flowmeter, the first control valve and the second control valve that can selectively penetrating combustion gas;
One end of described gas monitoring pipe is divided into two-way branch road at a point branch point after connecting the first described gas monitoring instrument by pipeline, and the first described vacuum pump and the first described control valve are arranged at respectively on the branch road described in two-way;
The other end of described gas monitoring pipe is divided into two-way branch road at a point branch point after connecting the second described gas monitoring instrument by pipeline, and the second described vacuum pump and the second described control valve are arranged at respectively on the branch road described in two-way;
Described flowmeter is arranged between two points of branch points at described gas monitoring pipe two ends;
The described gas monitoring instrument that is arranged at the described control valve of the described arbitrary end of gas monitoring pipe and is arranged at the described relative the other end of gas monitoring pipe and vacuum pump are connected successively and are formed gas leakage and judge system by described pipeline, described branch road and described gas monitoring pipe; Control valve described in vacuum pump described in gas monitoring instrument described in two, two, described flowmeter, two is connected and forms gas leakage point positioning system with described gas monitoring pipe by described pipeline, described branch road.
2. buried fuel gas pipeline leakage monitor and alarm system according to claim 1, it is characterized in that: it also comprises PLC control gear, described PLC control gear connects with signal with the first described gas monitoring instrument, the second described gas monitoring instrument, the first described vacuum pump, the second described vacuum pump, described flowmeter, the first described control valve, the second described control valve respectively.
3. buried fuel gas pipeline leakage monitor and alarm system according to claim 1 and 2, is characterized in that: described gas monitoring pipe comprises and forms the structure of molecule film with selectively penetrating function of tubulose and the internal layer support bushing by the structure of molecule film described in inner support.
4. buried fuel gas pipeline leakage monitor and alarm system according to claim 1, is characterized in that: on the described branch road that is provided with the first described vacuum pump and described the second vacuum pump at described gas monitoring pipe two ends, be also respectively arranged with gas concentration unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320803164.9U CN203604997U (en) | 2013-12-10 | 2013-12-10 | Buried gas pipeline leakage monitoring and alarming system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320803164.9U CN203604997U (en) | 2013-12-10 | 2013-12-10 | Buried gas pipeline leakage monitoring and alarming system |
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| Publication Number | Publication Date |
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| CN203604997U true CN203604997U (en) | 2014-05-21 |
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| CN201320803164.9U Withdrawn - After Issue CN203604997U (en) | 2013-12-10 | 2013-12-10 | Buried gas pipeline leakage monitoring and alarming system |
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| CN (1) | CN203604997U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644459A (en) * | 2013-12-10 | 2014-03-19 | 苏州苏净保护气氛有限公司 | Monitoring and alarming system and method for buried gas pipeline leakage |
| CN107606489A (en) * | 2017-09-30 | 2018-01-19 | 新奥（中国）燃气投资有限公司 | A kind of burning line management method, apparatus and system |
| CN110886968A (en) * | 2019-11-26 | 2020-03-17 | 北部湾大学 | Natural gas riser early warning system based on optical fiber sensing |
| CN114607944A (en) * | 2022-02-24 | 2022-06-10 | 之江实验室 | Natural gas pipeline leakage monitoring device and method |
-
2013
- 2013-12-10 CN CN201320803164.9U patent/CN203604997U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644459A (en) * | 2013-12-10 | 2014-03-19 | 苏州苏净保护气氛有限公司 | Monitoring and alarming system and method for buried gas pipeline leakage |
| CN103644459B (en) * | 2013-12-10 | 2016-03-02 | 苏州苏净保护气氛有限公司 | Steel gas pipe underground leakage monitoring alarm system and method |
| CN107606489A (en) * | 2017-09-30 | 2018-01-19 | 新奥（中国）燃气投资有限公司 | A kind of burning line management method, apparatus and system |
| CN107606489B (en) * | 2017-09-30 | 2019-04-30 | 新奥泛能网络科技有限公司 | A kind of burning line management method, apparatus and system |
| CN110886968A (en) * | 2019-11-26 | 2020-03-17 | 北部湾大学 | Natural gas riser early warning system based on optical fiber sensing |
| CN110886968B (en) * | 2019-11-26 | 2021-12-07 | 北部湾大学 | Natural gas riser early warning system based on optical fiber sensing |
| CN114607944A (en) * | 2022-02-24 | 2022-06-10 | 之江实验室 | Natural gas pipeline leakage monitoring device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140521 Effective date of abandoning: 20160302 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140521 Effective date of abandoning: 20160302 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |