CN201306286Y - Double-screw liquefied gas pump by-pass valve - Google Patents
Double-screw liquefied gas pump by-pass valve Download PDFInfo
- Publication number
- CN201306286Y CN201306286Y CNU2008201434775U CN200820143477U CN201306286Y CN 201306286 Y CN201306286 Y CN 201306286Y CN U2008201434775 U CNU2008201434775 U CN U2008201434775U CN 200820143477 U CN200820143477 U CN 200820143477U CN 201306286 Y CN201306286 Y CN 201306286Y
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Abstract
The utility model relates to a double-screw liquefied gas pump by-pass valve which comprises a valve body comprising a pressure hole and a pressure discharge hole, an adjustable bolt arranged in the valve body, an adjustable sliding piston, a main spring and a main valve core. The double-screw liquefied gas pump by-pass valve is characterized in that the centre of the main valve core is also provided with a group of assistant gas exhaust valves comprising valve cores and assistant springs. The utility model combines characteristics of liquefied gas, uses modern fluid mechanics theory and designs double-valve inner structure, when a pump starts, the valve can exhaust gas remained in pipelines, prevents gas seal phenomenon and then enhances the start security of the entire pipeline. When a conveying system is overloaded to work, redundant gas or liquid can be exhausted to a liquefied gas storage tank, and then the damage of the system to the pipeline or the pump caused by overpressure is prevented.
Description
[technical field]
The utility model relates to the bypass valve of liquefied petroleum gas (LPG) (LPG) transporting system, and is particularly a kind of to shield novel twin-screw liquefied gas pump bypass valve with pressure stabilization function of twin-screw liquefied gas pump and pipeline system.
[background technique]
In liquid gas station,, adorn a bypass valve outside generally on the export pipeline of system, requiring in order to improve the Security of pipe-line system.At present; employed bypass valve generally all is the common backflow safety valve of traditional form in the transporting system of liquefied petroleum gas (LPG) both at home and abroad; this valve is used for the neat liquid transporting system; adopt single spring to control the unlatching of single valve port; valve port is opened when line pressure raises; in order to keep line pressure, protective system safety.But it is for the liquid gas of very easily vaporizing, and when the gas-liquid two-phase state, work is extremely unstable, can't guarantee system high efficiency, stable operation.Also having a kind of is in two screw pump design itself built-in bypass valve to be arranged, the function that has general reflux valve equally, cause is in pump inside, its reflux medium refluxes without exterior tubing, and directly get back to Pump Suction Nozzle by the pump discharge place, therefore if be in open mode for a long time, the frictional heat that pump machinery produces can not be pulled away, and causes pump machinery itself sharply to heat up; The carburation by spraying phenomenon takes place in liquid gas at the valve port place, cause system to cavitate, and pump is produced severe impairment.In addition, the gas escape valve: be installed in the transporting system of liquid gas of easy vaporization,, only can play the single effect of the unnecessary gas of discharging for keeping line pressure, can not discharge liquid, and gas directly is discharged in the atmosphere, not only befouling environment but also waste resource.
[model utility content]
The purpose of this utility model is in order to overcome the deficiencies in the prior art, and provide a kind of twin-screw liquefied gas pump bypass valve, this twin-screw liquefied gas pump bypass valve is specifically designed to the bypass valve that plays voltage stabilizing and safety relief effect in the liquid gas transporting system, when pump starts, this valve can vent line in remaining gas, prevent " sealing gland " phenomenon, thereby improve the starting Security of whole pipeline.When transporting system works overloadingly, can be with unnecessary gas or fluid discharge to liquified gas container, anti-locking system causes damage because of superpressure to pipeline or pump.
The utility model be address the above problem the scheme that is adopted be the design a kind of twin-screw liquefied gas pump bypass valve.It comprises the valve body that contains pressure port and pressure relief opening, is loaded on the adjusting bolt in the valve body, regulates sliding plug, and main spring and main valve plug is characterized in that the center of described main valve plug also is provided with one group of auxiliary exhaust valve that is made of spool and secondary spring.
The utility model is in conjunction with the characteristic of liquid gas, uses the modern fluid mechanics theory, designed the bivalve internal structure, realized the Security of pump transporting system, and high efficiency has been improved the starting performance of liquid gas transporting system, avoids prime mover overburdening to start.Especially have following characteristics:
1, liquid gas is easily vaporized, especially when small flow is carried, because stirring, variation of ambient temperature and the pressure oscillation of pump, in systematic pipeline, gather a large amount of gaseous liquefied gas, this bypass valve can be when system's proper functioning the remaining or gaseous state discharge pipe of from liquid lng, vaporizing in pipeline, realize not changing under the pump discharge pressure situation realizing gas purging.
2. when system's overburdening, be protection pump and system, this bypass valve can in time be opened, the flow that venting is unnecessary, the safety of assurance pipeline and pump.
3. utilize the pore ejector principle, increase the interior pressure of liquified gas container, slow down the process of liquid gas in the basin, thereby improve twin-screw liquid gas pump intake condition, improve system works efficient.
[description of drawings]
Fig. 1 is a twin-screw liquefied petroleum pump bypass valve scheme of installation;
Fig. 2 is common bypass valve arrangement schematic representation;
Fig. 3 twin-screw liquefied gas pump bypass valve arrangement schematic representation.
Among the figure: 1-twin-screw liquefied gas pump; 2-bypass valve; 3-pressure gauge; 4-valve body; 5-adjusting bolt; 6-main spring; 7-secondary spring; 8-main valve plug; 9-auxiliary spool; 10-regulate and slide plug.
Be described in detail with reference to accompanying drawing below in conjunction with embodiment of the present utility model.
[embodiment]
As shown in Figure 3, twin-screw liquefied gas pump bypass valve of the present utility model comprises valve body 4, is loaded on the adjusting bolt 5 in the valve body, regulate sliding plug 10, main spring 6, main valve plug 8, and the auxiliary exhaust valve that constitutes by auxiliary spool 9 and secondary spring 7 etc. that places the center of main valve plug.The auxiliary spool shape of described auxiliary exhaust valve can be conical, cylindrical or spherical; Described auxiliary spool can be that often open or normally closed.Described valve body pressure port and pressure relief opening can be thread forms or form of flanges.Described main spring and secondary spring can be cylindrically coiled spring or butterfly spring.
As shown in Figure 1, bypass valve is installed in the outlet of twin-screw liquefied gas pump 1, and its relief outlet links through pressure gauge 3 and liquified gas container.When pump just started, the gas in the pipeline was discharged in the liquified gas container by the auxiliary exhaust valve in the main valve plug 8, thereby eliminated " sealing gland " phenomenon, avoided twin-screw liquefied gas pump band to press and started, and improved the startability of pump.Along with the operation of pump, the survival gas in the pipeline slowly is drained, and liquid lng slowly increases in the pipeline, and the pressure in the pipeline also slowly raises.When pressure that pressure is set greater than secondary spring 7, the liquid liquid gas is with auxiliary spool 9 jack-up exhaust port in closing main valve plug.When system's overburdening (line pressure greater than main spring 6 setting pressures time), liquid lng will jack-up main valve plug 8, opens bypass valve, liquid lng is discharged in the liquified gas container, thereby protects positive whole system safe operation.When line pressure descended, under the effect of main spring 6, main valve plug 8 was closed gradually, guaranteed the stable of line pressure.
When the suction performance of whole system not good, cause the exhaust port vaporization of twin-screw liquefied gas pump serious, when the gas of sneaking in the output medium is a lot, gaseous liquefied gas will discharge back liquified gas container by exhaust port in the main valve plug 8, when gaseous liquefied gas the carburation by spraying phenomenon can take place during by exhaust port, cause the liquefied petroleum gas storage pressure tank to raise, slow down the vaporization process of liquid gas in the basin, improve twin-screw liquid gas pump intake condition simultaneously, thereby reduce the vaporization degree of pump discharge place liquid gas, improve the working efficiency of system.
Claims (6)
1, a kind of twin-screw liquefied gas pump bypass valve, comprise the valve body that contains pressure port and pressure relief opening, be loaded on the adjusting bolt in the valve body, regulate sliding plug, main spring and main valve plug is characterized in that the center of described main valve plug also is provided with one group of auxiliary exhaust valve that is made of auxiliary spool and secondary spring.
2, twin-screw liquefied gas pump bypass valve according to claim 1, the auxiliary spool shape that it is characterized in that described auxiliary exhaust valve is conical, cylindrical or spherical.
3, twin-screw liquefied gas pump bypass valve according to claim 1 and 2 is characterized in that described auxiliary spool is that often open or normally closed.
4, twin-screw liquefied gas pump bypass valve according to claim 3 is characterized in that described valve body pressure port and pressure relief opening are thread forms or form of flanges.
5, twin-screw liquefied gas pump bypass valve according to claim 3 is characterized in that described main spring and secondary spring are cylindrically coiled spring or butterfly spring.
6, twin-screw liquefied gas pump bypass valve according to claim 4 is characterized in that described main spring and secondary spring are cylindrically coiled spring or butterfly spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201434775U CN201306286Y (en) | 2008-11-25 | 2008-11-25 | Double-screw liquefied gas pump by-pass valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201434775U CN201306286Y (en) | 2008-11-25 | 2008-11-25 | Double-screw liquefied gas pump by-pass valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201306286Y true CN201306286Y (en) | 2009-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201434775U Expired - Fee Related CN201306286Y (en) | 2008-11-25 | 2008-11-25 | Double-screw liquefied gas pump by-pass valve |
Country Status (1)
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| CN (1) | CN201306286Y (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003386A (en) * | 2010-11-27 | 2011-04-06 | 湖南机油泵股份有限公司 | Annular ring oil discharge valve lubricating pump |
| CN102269286A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Protection device for gas circuit system |
| CN102562512A (en) * | 2010-12-20 | 2012-07-11 | 西安航天远征流体控制股份有限公司 | Hand-operated hydraulic pump |
| CN103115173A (en) * | 2012-12-11 | 2013-05-22 | 天津市国威给排水设备制造有限公司 | Double seal water escape device with spring force regulation |
| CN103711752A (en) * | 2013-12-27 | 2014-04-09 | 胜瑞兰工业设备（苏州）有限公司 | Pressure relief valve with function of automatic air exhaust on hydraulic oil cavity |
| CN104180029A (en) * | 2014-09-05 | 2014-12-03 | 上海冠龙阀门机械有限公司 | Screwing opening type check valve capable of balancing pressure automatically |
| CN106178340A (en) * | 2016-08-31 | 2016-12-07 | 北京中瑞和电气有限公司 | Oil-filled equipment explosion-proof fire-extinguishing protection system and oil-filled equipment explosion-proof fire-extinguishing control method |
| CN106402629A (en) * | 2016-12-20 | 2017-02-15 | 湖南机油泵股份有限公司 | Anti-blocking high-pressure protection pressure limiting valve and engine oil pump |
| CN110425113A (en) * | 2019-08-14 | 2019-11-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and refrigeration equipment with it |
| CN110817162A (en) * | 2019-12-06 | 2020-02-21 | 上海依呗科技有限公司 | Liquid oxygen storage tank |
| CN110917543A (en) * | 2019-12-16 | 2020-03-27 | 福建侨龙应急装备股份有限公司 | Constant-pressure variable-flow remote water supply pump truck |
| CN111520512A (en) * | 2020-04-30 | 2020-08-11 | 张礼维 | Oil gas recovery conveying pressure control valve |
| CN112814900A (en) * | 2020-12-31 | 2021-05-18 | 浙江创为真空设备股份有限公司 | Screw pump exhaust pressure stabilizing structure |
-
2008
- 2008-11-25 CN CNU2008201434775U patent/CN201306286Y/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003386A (en) * | 2010-11-27 | 2011-04-06 | 湖南机油泵股份有限公司 | Annular ring oil discharge valve lubricating pump |
| CN102562512A (en) * | 2010-12-20 | 2012-07-11 | 西安航天远征流体控制股份有限公司 | Hand-operated hydraulic pump |
| CN102562512B (en) * | 2010-12-20 | 2015-11-18 | 西安航天远征流体控制股份有限公司 | A kind of hydraulic hand-pump |
| CN102269286A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Protection device for gas circuit system |
| CN103115173A (en) * | 2012-12-11 | 2013-05-22 | 天津市国威给排水设备制造有限公司 | Double seal water escape device with spring force regulation |
| CN103711752A (en) * | 2013-12-27 | 2014-04-09 | 胜瑞兰工业设备（苏州）有限公司 | Pressure relief valve with function of automatic air exhaust on hydraulic oil cavity |
| CN103711752B (en) * | 2013-12-27 | 2016-08-24 | 胜瑞兰工业设备（苏州）有限公司 | The pressure relief valve of band automatic ventilating function on hydraulic fluid chamber |
| CN104180029A (en) * | 2014-09-05 | 2014-12-03 | 上海冠龙阀门机械有限公司 | Screwing opening type check valve capable of balancing pressure automatically |
| CN106178340A (en) * | 2016-08-31 | 2016-12-07 | 北京中瑞和电气有限公司 | Oil-filled equipment explosion-proof fire-extinguishing protection system and oil-filled equipment explosion-proof fire-extinguishing control method |
| CN106178340B (en) * | 2016-08-31 | 2021-11-19 | 北京中瑞和电气有限公司 | Explosion-proof fire-extinguishing protection system for oil-filled equipment and explosion-proof fire-extinguishing control method for oil-filled equipment |
| CN106402629A (en) * | 2016-12-20 | 2017-02-15 | 湖南机油泵股份有限公司 | Anti-blocking high-pressure protection pressure limiting valve and engine oil pump |
| CN110425113A (en) * | 2019-08-14 | 2019-11-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and refrigeration equipment with it |
| CN110425113B (en) * | 2019-08-14 | 2022-04-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and refrigeration equipment with same |
| CN110817162A (en) * | 2019-12-06 | 2020-02-21 | 上海依呗科技有限公司 | Liquid oxygen storage tank |
| CN110917543A (en) * | 2019-12-16 | 2020-03-27 | 福建侨龙应急装备股份有限公司 | Constant-pressure variable-flow remote water supply pump truck |
| CN110917543B (en) * | 2019-12-16 | 2021-08-10 | 福建侨龙应急装备股份有限公司 | Constant-pressure variable-flow remote water supply pump truck |
| CN111520512A (en) * | 2020-04-30 | 2020-08-11 | 张礼维 | Oil gas recovery conveying pressure control valve |
| CN112814900A (en) * | 2020-12-31 | 2021-05-18 | 浙江创为真空设备股份有限公司 | Screw pump exhaust pressure stabilizing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20161125 |