CN205208147U - Natural gas pressure regulating system - Google Patents
Natural gas pressure regulating system Download PDFInfo
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- CN205208147U CN205208147U CN201521018287.7U CN201521018287U CN205208147U CN 205208147 U CN205208147 U CN 205208147U CN 201521018287 U CN201521018287 U CN 201521018287U CN 205208147 U CN205208147 U CN 205208147U
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- pressure
- pilot valve
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- natural gas
- pressure governor
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Abstract
The utility model discloses a natural gas pressure regulating system installs on natural gas line, including safety shut -off valve (9), work control voltage regulator (5), work voltage regulator (6), first order pilot valve (1), second level pilot valve (2) and third level pilot valve (3). The utility model discloses a work of second grade step -down mode can the effectual emergence that prevents phenomenons such as surging. But, if because the work voltage regulator breaks down, the work voltage regulator can normally not worked, work control voltage regulator can be automatic detects the change of natural gas line internal pressure, timely increasing step -down dynamics, and it gives vent to anger to make recovers to normal pressure value. After work control voltage regulator and work voltage regulator all broke down, safety shut -off valve can cut off the natural gas line route, stops to carry the natural gas to improve the stability of natural gas transportation equipment, improve factor of safety.
Description
Technical field
The utility model relates to natural gas transport field, particularly relates to a kind of natural gas pressure regulating system and establishing method thereof.
Background technique
In recent years, along with the high speed development of domestic economy, natural gas demand increases fast, and air contaminant treatment engineering and fire coal substitute, and accelerate this process further again.Divide the voltage regulating station of the pressure regulation workshop in defeated station and urban pipe network to develop into present skid-mounted from plant stand formula in one's early years, achieve batch production Virtual production.The major function of pressure regulation sledge realizes under inlet pressure constantly changes and constantly changes with downstream flow, obtains a stable Outlet pressure after pressure regulation sledge.
At present, in market, most of voltage adjusting device adopts one-level pressure regulation, generally include a work pressure governor, a monitoring pressure governor and a safety cut-off valve, under normal circumstances, safety cut-off valve and monitoring pressure regulator valve are in full-gear, by the pressure of work pressure governor adjustment rock gas, when work pressure governor break down can not continue pressure regulation time, when pressure increase extremely monitors the setting value of pressure governor, valve port turns down by monitoring pressure governor, the adapter of decompression task, when monitor pressure governor also break down can not continue pressure regulation time, when pressure is increased to the setting value of safety cut-off valve, safety cut-off valve can cut off natural gas line rapidly, prevent accident.
But if the inlet/outlet pressure reduction of pressure governor is large, just easily occur potential safety hazard, flow hour this problem is particularly serious.Valve port circulation area is too small, and temperature drop can be caused excessive, if Insufficient heating before pressure regulation, such as fouling of heat exchangers, then under the condition that, aperture large at temperature drop is little, valve port is easy to that ice occurs and blocks up.And ice is stifled occur after, because runner is blocked, downstream pressure declines rapidly, and modulating valve can be opened automatically, and high-speed gas flows through and blows off stifled for ice, and circulation area is skyrocketed, and downstream again can superpressure, and modulating valve cuts out rapidly again ... so repeatedly, just surge is defined.Meanwhile, because valve port opening is too small, when there being granule foreign in runner, being easy to again cause valve port damage thus pressure governor was lost efficacy, causing excess pressure cutout, affect the normal operation of equipment, and bring great safety problem.Secondly, adopt one-level pressure regulation, very large to the components and parts loss of equipment, add follow-up maintenance cost.
Model utility content
The purpose of this utility model is exactly will solve above-mentioned deficiency and provide a kind of natural gas pressure regulating system, effectively can prevent the generation of surging phenomenon, improves the stability of equipment operation, working life.
For solving the problems of the technologies described above, the utility model adopts following technological scheme:
A kind of natural gas pressure regulating system, comprise safety cut-off valve 9, work monitoring pressure governor 5, work pressure governor 6, first order pilot valve 1, second level pilot valve 2 and third level pilot valve 3, the suction port of described safety cut-off valve 9 connects natural gas upstream pipeline 4, the suction port of the air outlet pipeline connection work monitoring pressure governor 5 of described safety cut-off valve 9, the suction port of the air outlet pipeline connection work pressure governor 6 of described work monitoring pressure governor 5, connection downstream, the air outlet natural gas line of described work pressure governor 6, described first order pilot valve 1, second level pilot valve 2 and third level pilot valve 3 are connected successively, the suction port of described first order pilot valve 1 is connected with the air inlet duct of work monitoring pressure governor 5, the air outlet of described third level pilot valve 3 is connected with the induced pressure interface J of work monitoring pressure governor 5, the pressure signal port of described first order pilot valve 1 is connected with the decompression pressure relief opening K of work monitoring pressure governor 5, the pressure signal port of described second level pilot valve 2, the feedback pressure interface L of work monitoring pressure governor 5 is connected with the downstream natural gas line of work pressure governor 6 respectively, the pressure signal port of described third level pilot valve 3 is connected with the air outlet pipeline of work monitoring pressure governor 5.
Pilot valve comprises pressure regulation state and full-gear, and when the force value that the pressure signal port of pilot valve collects is greater than its setting value, pilot valve valve port turns down, cross tolerance to reduce, the pressure-reducing function that can realize, the atmospheric pressure value of its outlet is less than the atmospheric pressure value of its entrance, namely pressure regulation state; When the force value that the pressure signal port of pilot valve collects is less than its setting value, pilot valve valve port is opened greatly, until valve port standard-sized sheet, the decompression of this state is not obvious, and just simple conducting function, namely full-gear.
In aforesaid a kind of natural gas pressure regulating system, also comprise fourth stage pilot valve 7 and level V pilot valve 8, described fourth stage pilot valve 7 and level V pilot valve 8 are connected successively, the suction port of described fourth stage pilot valve 7 is connected with the air outlet pipeline of work monitoring pressure governor 5, the air outlet of described level V pilot valve 8 is connected with the induced pressure interface J ' of work pressure governor 6, the pressure signal port of described fourth stage pilot valve 7 is connected with the decompression pressure relief opening K ' of work pressure governor 6, the pressure signal port of described level V pilot valve 8 is connected with the downstream natural gas line of work pressure governor 6, the feedback pressure interface L ' of described work pressure governor 6 is connected with the downstream natural gas line of work pressure governor 6.
The utility model compared with prior art, the utility model carries out second depressurized by work monitoring pressure governor and work pressure governor, first step-down is first carried out by work monitoring pressure governor, then second time decompression is carried out by work pressure governor, large pressure drop operating mode effectively can be distributed to work monitoring pressure governor and work pressure governor, the generation of the phenomenon such as prevent surge, ice blocks up.Further, if broken down due to work pressure governor, work pressure governor can not normally work, and work monitoring pressure governor can detect the change of natural gas line internal pressure automatically, and strengthen step-down dynamics timely, making to give vent to anger returns to normal force value.After work monitoring pressure governor and work pressure governor all break down, safety cut-off valve can cut off natural gas line path, stops transport gas, thus improves stability and the working life of natural gas transport equipment, improves safety coefficient.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of the present utility model.
Reference character: 1-first order pilot valve, 2-second level pilot valve, 3-third level pilot valve, 4-natural gas line, 5-work monitoring pressure governor, 6-works pressure governor, 7-fourth stage pilot valve, 8-level V pilot valve, 9-safety cut-off valve, K-reduces pressure pressure relief opening, J-induced pressure interface, L-feedback pressure interface, K '-decompression pressure relief opening, J '-induced pressure interface, L '-feedback pressure interface.
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Embodiment
Embodiment of the present utility model: as shown in Figure 1, a kind of natural gas pressure regulating system, comprise safety cut-off valve 9, work monitoring pressure governor 5, work pressure governor 6, first order pilot valve 1, second level pilot valve 2 and third level pilot valve 3, the suction port of described safety cut-off valve 9 connects natural gas upstream pipeline 4, the suction port of the air outlet pipeline connection work monitoring pressure governor 5 of described safety cut-off valve 9, the suction port of the air outlet pipeline connection work pressure governor 6 of described work monitoring pressure governor 5, connection downstream, the air outlet natural gas line of described work pressure governor 6, described first order pilot valve 1, second level pilot valve 2 and third level pilot valve 3 are connected successively, the suction port of described first order pilot valve 1 is connected with the air inlet duct of work monitoring pressure governor 5, the air outlet of described third level pilot valve 3 is connected with the induced pressure interface J of work monitoring pressure governor 5, the pressure signal port of described first order pilot valve 1 is connected with the decompression pressure relief opening K of work monitoring pressure governor 5, the pressure signal port of described second level pilot valve 2, the feedback pressure interface L of work monitoring pressure governor 5 is connected with the downstream natural gas line of work pressure governor 6 respectively, the pressure signal port of described third level pilot valve 3 is connected with the air outlet pipeline of work monitoring pressure governor 5.
Described fourth stage pilot valve 7 and level V pilot valve 8 are connected successively, the suction port of fourth stage pilot valve 7 is connected with the air outlet pipeline of work monitoring pressure governor 5, the air outlet of described level V pilot valve 8 is connected with the induced pressure interface J ' of work pressure governor 6, the pressure signal port of described fourth stage pilot valve 7 is connected with the decompression pressure relief opening K ' of work pressure governor 6, the pressure signal port of described level V pilot valve 8 is connected with the downstream natural gas line of work pressure governor 6, the feedback pressure interface L ' of described work pressure governor 6 is connected with the downstream natural gas line of work pressure governor 6.
A kind of establishing method of natural gas pressure regulating system, comprise the steps: that controlling first order pilot valve 1 is in pressure regulation state, the atmospheric pressure value that the setting value of second level pilot valve 2 works in the downstream natural gas line of pressure governor 6 when being greater than normal operation, and the atmospheric pressure value in the air outlet pipeline of pressure governor 5 is monitored in work when being less than normal operation, the atmospheric pressure value worked in the air outlet pipeline of monitoring pressure governor 5 when the setting value of described third level pilot valve 3 equals normally to run.
Described fourth stage pilot valve 7 and level V pilot valve 8 are all in pressure regulation state.
The working principle of a kind of embodiment of the present utility model: when system is normally run, work monitoring pressure governor 5 pairs of rock gases carry out first order decompression, and the pressure of rock gas is reduced to P2 from P1; Work monitoring pressure governor 5 is controlled by first order pilot valve 1, second level pilot valve 2 and third level pilot valve 3.Under the effect of first order pilot valve 1, the gas pressure entered from its suction port drops to P11 from P1, the setting value of second level pilot valve 2 is that (P4 is slightly higher than P3 pressure for P4, approximate P3), now, the valve port of second level pilot valve 2 is in full-gear, rock gas enters third level pilot valve 3 through second level pilot valve 2, and the setting value of third level pilot valve 3 is P2, work monitoring pressure governor 5 is flowed to as power source after natural gas via third level pilot valve 3 regulates, the valve port action of control work monitoring pressure governor 5, realizes one-level pressure-reducing function.Work pressure governor 6 pairs of rock gases carry out second level decompression, and the pressure of rock gas is reduced to P3 from P2.
After work pressure governor 6 breaks down and can not reduce pressure, when the downstream natural gas line internal pressure of work pressure governor 6 rises to P4 (setting value of secondary pilot valve 2) by P3, the pressure that the pressure signal port of second level pilot valve 2 collects also rises to P4 by P3, and (P4 is a bit larger tham P3, and this pressure is the working pressure that downstream user can accept), the valve port opening of second level pilot valve 2 turns down, and the power source air pressure that third level pilot valve 3 flows to work monitoring pressure governor 5 also reduces thereupon; The aperture of work monitoring pressure governor 5 reduces, and the step-down of work monitoring pressure governor 5 puts more effort, and its gas pressure exported drops to P4 by P2.After work pressure governor 6 breaks down, work monitoring pressure governor 5 can strengthen step-down dynamics automatically under the effect of three pilot valves, is remained in normal output area by outlet pressure.
When work monitoring pressure governor 5 and work pressure governor 6 all can not step-down time, the pressure that safety cut-off valve 9 collects is rise to P5 (the cut-out pressure setting value of safety cut-off valve by P3, P5 is a bit larger tham P4), safety cut-off valve 9 can cut off the path of natural gas line 4 automatically, prevents potential safety hazard.Adopt this natural gas pressure regulating system, the generation of the phenomenons such as surge can be avoided, improve the stability of system cloud gray model.When the pressure governor 6 that works breaks down, outlet pressure also can remain in normal pressure range by work monitoring pressure governor 5, avoids the phenomenon occurring dying.
The utility model is not by the restriction of above-mentioned mode of execution; change, modification that other any does under not deviating from the Spirit Essence of this reality invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (2)
1. a natural gas pressure regulating system, it is characterized in that, comprise safety cut-off valve (9), work monitoring pressure governor (5), work pressure governor (6), first order pilot valve (1), second level pilot valve (2) and third level pilot valve (3), the suction port of described safety cut-off valve (9) connects natural gas upstream pipeline (4), the suction port of air outlet pipeline connection work monitoring pressure governor (5) of described safety cut-off valve (9), the suction port of air outlet pipeline connection work pressure governor (6) of described work monitoring pressure governor (5), connection downstream, the air outlet natural gas line of described work pressure governor (6), described first order pilot valve (1), second level pilot valve (2) and third level pilot valve (3) are connected successively, the suction port of described first order pilot valve (1) is connected with the air inlet duct of work monitoring pressure governor (5), the air outlet of described third level pilot valve (3) is connected with the induced pressure interface (J) of work monitoring pressure governor (5), the pressure signal port of described first order pilot valve (1) is connected with the decompression pressure relief opening (K) of work monitoring pressure governor (5), the pressure signal port of described second level pilot valve (2), the feedback pressure interface (L) of work monitoring pressure governor (5) is connected with the downstream natural gas line of work pressure governor (6) respectively, the pressure signal port of described third level pilot valve (3) is connected with the air outlet pipeline of work monitoring pressure governor (5).
2. a kind of natural gas pressure regulating system according to claim 1, it is characterized in that, also comprise fourth stage pilot valve (7) and level V pilot valve (8), described fourth stage pilot valve (7) and level V pilot valve (8) are connected successively, the suction port of described fourth stage pilot valve (7) is connected with the air outlet pipeline of work monitoring pressure governor (5), the air outlet of described level V pilot valve (8) is connected with the induced pressure interface (J ') of work pressure governor (6), the pressure signal port of described fourth stage pilot valve (7) is connected with the decompression pressure relief opening (K ') of work pressure governor (6), the pressure signal port of described level V pilot valve (8) is connected with the downstream natural gas line of work pressure governor (6), the feedback pressure interface (L ') of described work pressure governor (6) is connected with the downstream natural gas line of work pressure governor (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018287.7U CN205208147U (en) | 2015-12-09 | 2015-12-09 | Natural gas pressure regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018287.7U CN205208147U (en) | 2015-12-09 | 2015-12-09 | Natural gas pressure regulating system |
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| Publication Number | Publication Date |
|---|---|
| CN205208147U true CN205208147U (en) | 2016-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521018287.7U Withdrawn - After Issue CN205208147U (en) | 2015-12-09 | 2015-12-09 | Natural gas pressure regulating system |
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| CN (1) | CN205208147U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423132A (en) * | 2015-12-09 | 2016-03-23 | 高拓石油天然气技术（上海）有限责任公司 | Natural gas pressure regulating system and setting method thereof |
| CN109595472A (en) * | 2018-11-29 | 2019-04-09 | 北京市燃气集团有限责任公司 | The pipeline abnormal flow recognition methods of mesolow garden and device based on spectrum analysis |
-
2015
- 2015-12-09 CN CN201521018287.7U patent/CN205208147U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423132A (en) * | 2015-12-09 | 2016-03-23 | 高拓石油天然气技术（上海）有限责任公司 | Natural gas pressure regulating system and setting method thereof |
| CN105423132B (en) * | 2015-12-09 | 2019-03-08 | 高拓石油天然气技术（上海）有限责任公司 | A kind of natural gas pressure regulating system and its setting method |
| CN109595472A (en) * | 2018-11-29 | 2019-04-09 | 北京市燃气集团有限责任公司 | The pipeline abnormal flow recognition methods of mesolow garden and device based on spectrum analysis |
| CN109595472B (en) * | 2018-11-29 | 2020-07-24 | 北京市燃气集团有限责任公司 | Method and device for identifying abnormal flow of medium-low pressure yard pipeline based on spectral analysis |
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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: 20160504 Effective date of abandoning: 20190308 |
|
| AV01 | Patent right actively abandoned |