CN201297647Y - Pipeline pressure control system for combustible gas - Google Patents
Pipeline pressure control system for combustible gas Download PDFInfo
- Publication number
- CN201297647Y CN201297647Y CNU2008203028456U CN200820302845U CN201297647Y CN 201297647 Y CN201297647 Y CN 201297647Y CN U2008203028456 U CNU2008203028456 U CN U2008203028456U CN 200820302845 U CN200820302845 U CN 200820302845U CN 201297647 Y CN201297647 Y CN 201297647Y
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- Prior art keywords
- pressure
- valve
- pipeline
- outlet
- control system
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- Expired - Fee Related
Links
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 13
- 239000002737 fuel gas Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000003063 flame retardant Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
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- Feeding And Controlling Fuel (AREA)
Abstract
The utility model discloses a pipeline pressure control system of combustible gas, especially a pressure automatic control system for carrying combustible gas's pipeline to burner. Aiming at the defects of the existing system, the pipeline pressure control system capable of rapidly stabilizing the outlet pressure is provided, and a main pipeline (1) is provided with: the pressure regulating valve comprises an inlet pressure sensor (2), an inlet safety shut-off valve group (3), a pressure control valve (5), an outlet pressure sensor (7) and an outlet diffusing unit (9), wherein a pressure stabilizing bypass pipeline (8) bypassing the pressure control valve (5) and paralleling with a main pipeline (1) is arranged, the outlet pressure is quickly stabilized through pressure compensation when the outlet pressure is too low or the pressure relief is too high and the pressure relief is excessive through opening and closing of the pressure stabilizing bypass pipeline (8). The device is used for the pressure stabilization control of the combustible gas delivery pipeline, and can be used for the reconstruction of a new pipeline system and the existing pipeline.
Description
Technical field
The utility model relates to a kind of loine pressure control system of fuel gas, especially a kind of pressure automatic control system that is used for to the pipeline of burner transporting combustible gases.
Background technology
Loine pressure automatic control system in the existing gas combustion apparatus as shown in Figure 1, pipeline upper edge gas throughput direction is provided with: the unit is diffused in inlet pressure transducer, inlet safety cut-off valve group, pressure-control valve, outlet pressure sensor, outlet, it is an entrance before pressure-control valve, after be outlet section.System control unit is regulated with stabilization of export pressure the pressure-control valve opening according to entrance and exit pressure sensor signal difference; Outlet is diffused the unit and the pipeline behind the inlet safety cut-off valve is carried out fast pressure relief in limited time in the outlet pressure superelevation; The inlet safety cut-off valve is arranged on the entrance of pipeline, closes being connected with protection system of inlet and pipe network in the time of pipeline inlet pressure superelevation limit or lower bound.
In existing system is used, because hysteresis on the control module feedback time and the hysteresis on the valve event, when pipeline gas pressure occurs than great fluctuation process, gas moment consumption when opening or closing as burner changes, perhaps inlet pressure fluctuation when causing adjusting range big, will cause pipe outlet pressure to occur than great fluctuation process, as: air pressure is crossed low and pressure-control valve adjustment hysteresis can cause the job insecurity of burner, and easily burner is caused damage; And the excessive and pressure-control valve adjustment of air pressure lags behind, to cause exporting the unlatching of diffusing the unit, but it open to lag behind and will cause security of system hidden danger, and it is closed hysteresis and may cause pipeline outlet negative pressure to cause that air pours in down a chimney and causes the pipeline blast causing serious security incident.
The utility model content
For the hysteresis that overcomes existing control module and valve stability, the Influence on security to whole system, technical problem to be solved in the utility model provides a kind of loine pressure control system that can the fast and stable outlet pressure.
The technical scheme that its technical problem that solves the utility model adopts is: diffuse the unit except inlet porting pressure sensor on main line, inlet safety cut-off valve group, pressure-control valve, outlet pressure sensor, outlet, also added walk around pressure-control valve and with trunk line side by side and be provided with the voltage stabilizing bypass line of pressure maintaining valve group.
After adopting the utility model, when outlet pressure was crossed low or negative pressure and surpassed the setting of pressure maintaining valve group, the pressure maintaining valve group was connected this bypass line, and relatively lagging behind of system acting compensated, thereby stablize the pipeline outlet pressure rapidly, realized the fast and stable of outlet pressure.
Cross low different requirements during with negative pressure in order to satisfy outlet pressure, can also be provided with that to walk around inlet safety cut-off valve and main line arranged side by side and be provided with the ftercompction bypass line of pressure-supplementing valve group.The voltage stabilizing value when having realized hypotony and the independent setting of negative pressure safety value, the potential safety hazard that may exist during safety requirements when having avoided being arranged on voltage stabilizing bypass line inlet before the safety cut-off valve and having satisfied negative pressure has simultaneously further increased the security of system.
The possibility that occurs negative pressure for further minimizing system, flashback tank can also further be set, this flashback tank be provided with that an end is communicated with the main line port of export and the other end by the water seal pipeline that water seal sealed, and be higher than the pipeline that diffuses of water seal liquid level with the link position of flashback tank.Fast pressure relief when outlet pressure is excessive, thus the open frequency that the unit is diffused in outlet reduced, reduced the possibility that negative pressure occurs.
And cause potential safety hazard in order further to stop combustion-supporting gas to enter flashback tank, also be provided with the fire-retardant gas piping that in flashback tank, feeds fire-retardant gas.Make to be in barotropic state in the flashback tank always, further increased the security of system.
Description of drawings
Fig. 1 is this prior art system layout drawing.
Fig. 2 is a system layout of the present utility model
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
As shown in Figure 2, the utility model has set gradually inlet pressure transducer 2, inlet safety cut-off valve group 3, pressure-control valve 5, outlet pressure sensor 7, has exported and diffuse unit 9 at main line 1 upper edge gas throughput direction, inlet safety cut-off valve group 3 comprises two safety valves and one and diffuses unit 4, and is provided with and gets around pressure-control valve 5 and the voltage stabilizing bypass line 8 arranged side by side with main line 1.The inlet of voltage stabilizing bypass line 8 is arranged between inlet safety cut-off valve group 3 and the pressure-control valve 5, outlet is after pressure-control valve 5, it is provided with self-supporting pressure-reducing valve 6, this valve also can with other automatically the valve or the valve group of high-speed switch and adjustable solar term flow replace, as a stop valve and the valve group that the mechanical type pressure-reducing valve is formed.Self-supporting pressure-reducing valve 6 outlet pressures are set at the outlet pressure of main line 1, when outlet pressure during less than the setting value of self-supporting pressure-reducing valve 6, it opens and regulates the throughput of voltage stabilizing bypass line 6 rapidly, the adjusting of introducing the pressure-control valve 5 that gases relatively lag behind to action before the pressure-control valve 5 compensates, and realizes the stable of outlet pressure.And the inlet setting of this voltage stabilizing bypass line 8 has also avoided inlet to walk around the potential safety hazard that safety cut-off valve 3 may exist.
On main line 1, also be provided with and get around inlet safety cut-off valve group 3 and the ftercompction bypass line 15 arranged side by side with main line 1, its inlet is before safety cut-off valve 3, outlet is after pressure-control valve 5, be provided with pressure-supplementing valve group 14 on it, this valve group is made up of mechanical type pressure-reducing valve 16, stop valve 17, but also can with self-supporting pressure-reducing valve or other automatically high-speed switch and adjustable solar term flow valve or the replacement of valve group.This pipeline is set secure setting by stop valve 17, when the hysteresis that unit 9 moves is diffused in the hysteresis and the outlet of system control unit feedback time, when causing the outlet pressure of main line 1 to become negative pressure, stop valve 17 is connected ftercompction bypass line 15 rapidly, directly introduce gas to main line 1 outlet supercharging from main line 1 inlet, make main line 1 outlet pressure get back to normal interval, realize the purpose of ftercompction, air pours in down a chimney the security incident that may cause when having prevented negative pressure.And can set and regulate, be i.e. the setting of ftercompction speed and adjusting by 16 pairs of throughputs of mechanical type pressure-reducing valve.And the outlet of this ftercompction bypass management 15 is provided with the influence of further having avoided 5 pairs of ftercompction speed of pressure-control valve to exist, has guaranteed the rapid response of system.
Also be provided with flashback tank 12 in the present embodiment, by water seal pipeline 10 flashback tank 12 is connected with main line 1 outlet, water seal pipeline 10 is connected an end with flashback tank 12 and stretches into below the liquid level, be higher than the water seal liquid level and diffuse its inlet of top that pipeline is installed on flashback tank 12, thereby by water seal with diffuse pipeline 11 and efflux the realization fast pressure relief, the equivalent pressure that liquid level produces adds that atmospheric pressure is the secure setting of this water seal arrangement when main line 1 outlet pressure is excessive.And only just unlatching under some limiting case of unit is diffused in outlet, thereby reduces the open frequency that the unit is diffused in outlet, has reduced the possibility that negative pressure occurs.Nitrogen pipeline 13 also is installed on this flashback tank, the top that its outlet is arranged on flashback tank 12 is higher than the liquid level place, make and be in barotropic state in the flashback tank 12 all the time by feeding nitrogen, avoided possible air to pour in down a chimney, here nitrogen also can replace with fire-retardant gases such as carbon dioxide, and the outlet of nitrogen pipeline also can be under liquid level, but its air pressure should be made suitable adjustment according to its position.
Claims (8)
- The loine pressure control system of [claim 1] a kind of fuel gas, be provided with on main line (1): unit (9) is diffused in inlet pressure transducer (2), inlet safety cut-off valve group (3), pressure-control valve (5), outlet pressure sensor (7), outlet, it is characterized in that: be provided with and walk around pressure-control valve (5) and the voltage stabilizing bypass line (8) arranged side by side with main line (1), it is provided with pressure maintaining valve group (6).
- The loine pressure control system of [claim 2] fuel gas as claimed in claim 1 is characterized in that: pressure maintaining valve group (6) is self-supporting pressure-reducing valve or the valve group be made up of pressure-reducing valve and stop valve.
- The loine pressure control system of [claim 3] fuel gas as claimed in claim 1, it is characterized in that: the inlet of voltage stabilizing bypass line (8) is arranged between inlet safety cut-off valve group (3) and the pressure-control valve (5), and outlet at pressure-control valve (5) afterwards.
- The loine pressure control system of [claim 4] fuel gas as claimed in claim 1, it is characterized in that: be provided with and walk around inlet safety cut-off valve group (3) and the ftercompction bypass line (15) arranged side by side with main line (1), it is provided with pressure-supplementing valve group (14).
- The loine pressure control system of [claim 5] fuel gas as claimed in claim 4 is characterized in that: pressure-supplementing valve group (14) is self-supporting pressure-reducing valve or the valve group be made up of pressure-reducing valve and stop valve.
- The loine pressure control system of [claim 6] fuel gas as claimed in claim 4 is characterized in that: the inlet of ftercompction bypass line (15) is arranged on safety cut-off valve group (3) before, and outlet at inlet pressure control valve (5) afterwards.
- [claim 7] is as the loine pressure control system of claim 1 or 4 described fuel gas, it is characterized in that: be provided with flashback tank (12), flashback tank (12) is equipped with that an end is communicated with main line (1) port of export and the other end stretches into the following water seal pipeline (10) of liquid level in the flashback tank (12), with diffuse pipeline (11), the link position that diffuses pipeline (11) and flashback tank (12) is higher than the liquid level in the flashback tank (12).
- The loine pressure control system of [claim 8] fuel gas as claimed in claim 7 is characterized in that: flashback tank (12) also is connected with fire-retardant gas piping (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203028456U CN201297647Y (en) | 2008-11-19 | 2008-11-19 | Pipeline pressure control system for combustible gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203028456U CN201297647Y (en) | 2008-11-19 | 2008-11-19 | Pipeline pressure control system for combustible gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201297647Y true CN201297647Y (en) | 2009-08-26 |
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ID=41043629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008203028456U Expired - Fee Related CN201297647Y (en) | 2008-11-19 | 2008-11-19 | Pipeline pressure control system for combustible gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201297647Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445367A (en) * | 2010-10-13 | 2012-05-09 | 中国石油化工股份有限公司 | Pretreatment system used for gas on-line analysis |
| GB2491394A (en) * | 2011-06-02 | 2012-12-05 | Honeywell Uk Ltd | Pressure control of pressurised air supply |
| CN104100839A (en) * | 2014-07-24 | 2014-10-15 | 北京正拓气体科技有限公司 | Pressure regulation and safety device for gas |
| CN106764452A (en) * | 2016-12-29 | 2017-05-31 | 武汉钢铁股份有限公司 | A kind of firebreak device and method for inflammable media collapse equipment |
| CN110304284A (en) * | 2019-07-02 | 2019-10-08 | 北京卫星环境工程研究所 | Low temperature low pressure gas pressure accuracy-control system and method |
-
2008
- 2008-11-19 CN CNU2008203028456U patent/CN201297647Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445367A (en) * | 2010-10-13 | 2012-05-09 | 中国石油化工股份有限公司 | Pretreatment system used for gas on-line analysis |
| GB2491394A (en) * | 2011-06-02 | 2012-12-05 | Honeywell Uk Ltd | Pressure control of pressurised air supply |
| CN104100839A (en) * | 2014-07-24 | 2014-10-15 | 北京正拓气体科技有限公司 | Pressure regulation and safety device for gas |
| CN106764452A (en) * | 2016-12-29 | 2017-05-31 | 武汉钢铁股份有限公司 | A kind of firebreak device and method for inflammable media collapse equipment |
| CN110304284A (en) * | 2019-07-02 | 2019-10-08 | 北京卫星环境工程研究所 | Low temperature low pressure gas pressure accuracy-control system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: PANGANG GROUP STEEL VANADIUM + TITANIUM CO., LTD. Free format text: FORMER NAME: PANZHIHUA NEW STEEL + VANADIUM CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 617067 Panzhihua city of Sichuan Province East Xiangyang Village, new technology and quality department Patentee after: Pangang Group Steel Vanadium & Titanium Co., Ltd. Address before: 617067 Panzhihua city of Sichuan Province East Xiangyang Village, new technology and quality department Patentee before: Panzhihua New Steel & Vanadium Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090826 Termination date: 20131119 |